2 * H.26L/H.264/AVC/JVT/14496-10/... decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * H.264 / AVC / MPEG4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
28 #include "libavutil/imgutils.h"
31 #include "cabac_functions.h"
33 #include "error_resilience.h"
35 #include "mpegvideo.h"
38 #include "h264chroma.h"
39 #include "h264_mvpred.h"
42 #include "rectangle.h"
45 #include "vdpau_internal.h"
46 #include "libavutil/avassert.h"
51 const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
53 static const uint8_t rem6[QP_MAX_NUM + 1] = {
54 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2,
55 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
56 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
59 static const uint8_t div6[QP_MAX_NUM + 1] = {
60 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3,
61 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
62 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10,
65 static const enum AVPixelFormat h264_hwaccel_pixfmt_list_420[] = {
66 #if CONFIG_H264_DXVA2_HWACCEL
69 #if CONFIG_H264_VAAPI_HWACCEL
72 #if CONFIG_H264_VDA_HWACCEL
75 #if CONFIG_H264_VDPAU_HWACCEL
82 static const enum AVPixelFormat h264_hwaccel_pixfmt_list_jpeg_420[] = {
83 #if CONFIG_H264_DXVA2_HWACCEL
86 #if CONFIG_H264_VAAPI_HWACCEL
89 #if CONFIG_H264_VDA_HWACCEL
92 #if CONFIG_H264_VDPAU_HWACCEL
99 static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
101 int mb_x, int mb_y, int mb_intra, int mb_skipped)
103 H264Context *h = opaque;
107 h->mb_xy = mb_x + mb_y * h->mb_stride;
108 memset(h->non_zero_count_cache, 0, sizeof(h->non_zero_count_cache));
110 /* FIXME: It is possible albeit uncommon that slice references
111 * differ between slices. We take the easy approach and ignore
112 * it for now. If this turns out to have any relevance in
113 * practice then correct remapping should be added. */
114 if (ref >= h->ref_count[0])
116 fill_rectangle(&h->cur_pic.ref_index[0][4 * h->mb_xy],
118 fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
119 fill_rectangle(h->mv_cache[0][scan8[0]], 4, 4, 8,
120 pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
121 assert(!FRAME_MBAFF(h));
122 ff_h264_hl_decode_mb(h);
125 void ff_h264_draw_horiz_band(H264Context *h, int y, int height)
127 AVCodecContext *avctx = h->avctx;
128 Picture *cur = &h->cur_pic;
129 Picture *last = h->ref_list[0][0].f.data[0] ? &h->ref_list[0][0] : NULL;
130 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
131 int vshift = desc->log2_chroma_h;
132 const int field_pic = h->picture_structure != PICT_FRAME;
138 height = FFMIN(height, avctx->height - y);
140 if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
143 if (avctx->draw_horiz_band) {
145 int offset[AV_NUM_DATA_POINTERS];
148 if (cur->f.pict_type == AV_PICTURE_TYPE_B || h->low_delay ||
149 (avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
156 offset[0] = y * src->linesize[0];
158 offset[2] = (y >> vshift) * src->linesize[1];
159 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
164 avctx->draw_horiz_band(avctx, src, offset,
165 y, h->picture_structure, height);
169 static void unref_picture(H264Context *h, Picture *pic)
171 int off = offsetof(Picture, tf) + sizeof(pic->tf);
177 ff_thread_release_buffer(h->avctx, &pic->tf);
178 av_buffer_unref(&pic->hwaccel_priv_buf);
180 av_buffer_unref(&pic->qscale_table_buf);
181 av_buffer_unref(&pic->mb_type_buf);
182 for (i = 0; i < 2; i++) {
183 av_buffer_unref(&pic->motion_val_buf[i]);
184 av_buffer_unref(&pic->ref_index_buf[i]);
187 memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
190 static void release_unused_pictures(H264Context *h, int remove_current)
194 /* release non reference frames */
195 for (i = 0; i < MAX_PICTURE_COUNT; i++) {
196 if (h->DPB[i].f.data[0] && !h->DPB[i].reference &&
197 (remove_current || &h->DPB[i] != h->cur_pic_ptr)) {
198 unref_picture(h, &h->DPB[i]);
203 static int ref_picture(H264Context *h, Picture *dst, Picture *src)
207 av_assert0(!dst->f.buf[0]);
208 av_assert0(src->f.buf[0]);
212 ret = ff_thread_ref_frame(&dst->tf, &src->tf);
217 dst->qscale_table_buf = av_buffer_ref(src->qscale_table_buf);
218 dst->mb_type_buf = av_buffer_ref(src->mb_type_buf);
219 if (!dst->qscale_table_buf || !dst->mb_type_buf)
221 dst->qscale_table = src->qscale_table;
222 dst->mb_type = src->mb_type;
224 for (i = 0; i < 2; i ++) {
225 dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
226 dst->ref_index_buf[i] = av_buffer_ref(src->ref_index_buf[i]);
227 if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i])
229 dst->motion_val[i] = src->motion_val[i];
230 dst->ref_index[i] = src->ref_index[i];
233 if (src->hwaccel_picture_private) {
234 dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
235 if (!dst->hwaccel_priv_buf)
237 dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
240 for (i = 0; i < 2; i++)
241 dst->field_poc[i] = src->field_poc[i];
243 memcpy(dst->ref_poc, src->ref_poc, sizeof(src->ref_poc));
244 memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
247 dst->frame_num = src->frame_num;
248 dst->mmco_reset = src->mmco_reset;
249 dst->pic_id = src->pic_id;
250 dst->long_ref = src->long_ref;
251 dst->mbaff = src->mbaff;
252 dst->field_picture = src->field_picture;
253 dst->needs_realloc = src->needs_realloc;
254 dst->reference = src->reference;
258 unref_picture(h, dst);
263 static int alloc_scratch_buffers(H264Context *h, int linesize)
265 int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
267 if (h->bipred_scratchpad)
270 h->bipred_scratchpad = av_malloc(16 * 6 * alloc_size);
271 // edge emu needs blocksize + filter length - 1
272 // (= 21x21 for h264)
273 h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 21);
274 h->me.scratchpad = av_mallocz(alloc_size * 2 * 16 * 2);
276 if (!h->bipred_scratchpad || !h->edge_emu_buffer || !h->me.scratchpad) {
277 av_freep(&h->bipred_scratchpad);
278 av_freep(&h->edge_emu_buffer);
279 av_freep(&h->me.scratchpad);
280 return AVERROR(ENOMEM);
283 h->me.temp = h->me.scratchpad;
288 static int init_table_pools(H264Context *h)
290 const int big_mb_num = h->mb_stride * (h->mb_height + 1) + 1;
291 const int mb_array_size = h->mb_stride * h->mb_height;
292 const int b4_stride = h->mb_width * 4 + 1;
293 const int b4_array_size = b4_stride * h->mb_height * 4;
295 h->qscale_table_pool = av_buffer_pool_init(big_mb_num + h->mb_stride,
297 h->mb_type_pool = av_buffer_pool_init((big_mb_num + h->mb_stride) *
298 sizeof(uint32_t), av_buffer_allocz);
299 h->motion_val_pool = av_buffer_pool_init(2 * (b4_array_size + 4) *
300 sizeof(int16_t), av_buffer_allocz);
301 h->ref_index_pool = av_buffer_pool_init(4 * mb_array_size, av_buffer_allocz);
303 if (!h->qscale_table_pool || !h->mb_type_pool || !h->motion_val_pool ||
304 !h->ref_index_pool) {
305 av_buffer_pool_uninit(&h->qscale_table_pool);
306 av_buffer_pool_uninit(&h->mb_type_pool);
307 av_buffer_pool_uninit(&h->motion_val_pool);
308 av_buffer_pool_uninit(&h->ref_index_pool);
309 return AVERROR(ENOMEM);
315 static int alloc_picture(H264Context *h, Picture *pic)
319 av_assert0(!pic->f.data[0]);
322 ret = ff_thread_get_buffer(h->avctx, &pic->tf, pic->reference ?
323 AV_GET_BUFFER_FLAG_REF : 0);
327 h->linesize = pic->f.linesize[0];
328 h->uvlinesize = pic->f.linesize[1];
330 if (h->avctx->hwaccel) {
331 const AVHWAccel *hwaccel = h->avctx->hwaccel;
332 av_assert0(!pic->hwaccel_picture_private);
333 if (hwaccel->priv_data_size) {
334 pic->hwaccel_priv_buf = av_buffer_allocz(hwaccel->priv_data_size);
335 if (!pic->hwaccel_priv_buf)
336 return AVERROR(ENOMEM);
337 pic->hwaccel_picture_private = pic->hwaccel_priv_buf->data;
341 if (!h->qscale_table_pool) {
342 ret = init_table_pools(h);
347 pic->qscale_table_buf = av_buffer_pool_get(h->qscale_table_pool);
348 pic->mb_type_buf = av_buffer_pool_get(h->mb_type_pool);
349 if (!pic->qscale_table_buf || !pic->mb_type_buf)
352 pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * h->mb_stride + 1;
353 pic->qscale_table = pic->qscale_table_buf->data + 2 * h->mb_stride + 1;
355 for (i = 0; i < 2; i++) {
356 pic->motion_val_buf[i] = av_buffer_pool_get(h->motion_val_pool);
357 pic->ref_index_buf[i] = av_buffer_pool_get(h->ref_index_pool);
358 if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
361 pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
362 pic->ref_index[i] = pic->ref_index_buf[i]->data;
367 unref_picture(h, pic);
368 return (ret < 0) ? ret : AVERROR(ENOMEM);
371 static inline int pic_is_unused(H264Context *h, Picture *pic)
373 if (pic->f.data[0] == NULL)
375 if (pic->needs_realloc && !(pic->reference & DELAYED_PIC_REF))
380 static int find_unused_picture(H264Context *h)
384 for (i = 0; i < MAX_PICTURE_COUNT; i++) {
385 if (pic_is_unused(h, &h->DPB[i]))
388 if (i == MAX_PICTURE_COUNT)
389 return AVERROR_INVALIDDATA;
391 if (h->DPB[i].needs_realloc) {
392 h->DPB[i].needs_realloc = 0;
393 unref_picture(h, &h->DPB[i]);
400 * Check if the top & left blocks are available if needed and
401 * change the dc mode so it only uses the available blocks.
403 int ff_h264_check_intra4x4_pred_mode(H264Context *h)
405 static const int8_t top[12] = {
406 -1, 0, LEFT_DC_PRED, -1, -1, -1, -1, -1, 0
408 static const int8_t left[12] = {
409 0, -1, TOP_DC_PRED, 0, -1, -1, -1, 0, -1, DC_128_PRED
413 if (!(h->top_samples_available & 0x8000)) {
414 for (i = 0; i < 4; i++) {
415 int status = top[h->intra4x4_pred_mode_cache[scan8[0] + i]];
417 av_log(h->avctx, AV_LOG_ERROR,
418 "top block unavailable for requested intra4x4 mode %d at %d %d\n",
419 status, h->mb_x, h->mb_y);
422 h->intra4x4_pred_mode_cache[scan8[0] + i] = status;
427 if ((h->left_samples_available & 0x8888) != 0x8888) {
428 static const int mask[4] = { 0x8000, 0x2000, 0x80, 0x20 };
429 for (i = 0; i < 4; i++)
430 if (!(h->left_samples_available & mask[i])) {
431 int status = left[h->intra4x4_pred_mode_cache[scan8[0] + 8 * i]];
433 av_log(h->avctx, AV_LOG_ERROR,
434 "left block unavailable for requested intra4x4 mode %d at %d %d\n",
435 status, h->mb_x, h->mb_y);
438 h->intra4x4_pred_mode_cache[scan8[0] + 8 * i] = status;
444 } // FIXME cleanup like ff_h264_check_intra_pred_mode
447 * Check if the top & left blocks are available if needed and
448 * change the dc mode so it only uses the available blocks.
450 int ff_h264_check_intra_pred_mode(H264Context *h, int mode, int is_chroma)
452 static const int8_t top[7] = { LEFT_DC_PRED8x8, 1, -1, -1 };
453 static const int8_t left[7] = { TOP_DC_PRED8x8, -1, 2, -1, DC_128_PRED8x8 };
456 av_log(h->avctx, AV_LOG_ERROR,
457 "out of range intra chroma pred mode at %d %d\n",
462 if (!(h->top_samples_available & 0x8000)) {
465 av_log(h->avctx, AV_LOG_ERROR,
466 "top block unavailable for requested intra mode at %d %d\n",
472 if ((h->left_samples_available & 0x8080) != 0x8080) {
474 if (is_chroma && (h->left_samples_available & 0x8080)) {
475 // mad cow disease mode, aka MBAFF + constrained_intra_pred
476 mode = ALZHEIMER_DC_L0T_PRED8x8 +
477 (!(h->left_samples_available & 0x8000)) +
478 2 * (mode == DC_128_PRED8x8);
481 av_log(h->avctx, AV_LOG_ERROR,
482 "left block unavailable for requested intra mode at %d %d\n",
491 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src,
492 int *dst_length, int *consumed, int length)
498 // src[0]&0x80; // forbidden bit
499 h->nal_ref_idc = src[0] >> 5;
500 h->nal_unit_type = src[0] & 0x1F;
505 #define STARTCODE_TEST \
506 if (i + 2 < length && src[i + 1] == 0 && src[i + 2] <= 3) { \
507 if (src[i + 2] != 3) { \
508 /* startcode, so we must be past the end */ \
513 #if HAVE_FAST_UNALIGNED
514 #define FIND_FIRST_ZERO \
515 if (i > 0 && !src[i]) \
520 for (i = 0; i + 1 < length; i += 9) {
521 if (!((~AV_RN64A(src + i) &
522 (AV_RN64A(src + i) - 0x0100010001000101ULL)) &
523 0x8000800080008080ULL))
530 for (i = 0; i + 1 < length; i += 5) {
531 if (!((~AV_RN32A(src + i) &
532 (AV_RN32A(src + i) - 0x01000101U)) &
541 for (i = 0; i + 1 < length; i += 2) {
544 if (i > 0 && src[i - 1] == 0)
550 if (i >= length - 1) { // no escaped 0
551 *dst_length = length;
552 *consumed = length + 1; // +1 for the header
556 // use second escape buffer for inter data
557 bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0;
558 av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx],
559 length + FF_INPUT_BUFFER_PADDING_SIZE);
560 dst = h->rbsp_buffer[bufidx];
567 while (si + 2 < length) {
568 // remove escapes (very rare 1:2^22)
569 if (src[si + 2] > 3) {
570 dst[di++] = src[si++];
571 dst[di++] = src[si++];
572 } else if (src[si] == 0 && src[si + 1] == 0) {
573 if (src[si + 2] == 3) { // escape
578 } else // next start code
582 dst[di++] = src[si++];
585 dst[di++] = src[si++];
588 memset(dst + di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
591 *consumed = si + 1; // +1 for the header
592 /* FIXME store exact number of bits in the getbitcontext
593 * (it is needed for decoding) */
598 * Identify the exact end of the bitstream
599 * @return the length of the trailing, or 0 if damaged
601 static int decode_rbsp_trailing(H264Context *h, const uint8_t *src)
606 tprintf(h->avctx, "rbsp trailing %X\n", v);
608 for (r = 1; r < 9; r++) {
616 static inline int get_lowest_part_list_y(H264Context *h, Picture *pic, int n,
617 int height, int y_offset, int list)
619 int raw_my = h->mv_cache[list][scan8[n]][1];
620 int filter_height_up = (raw_my & 3) ? 2 : 0;
621 int filter_height_down = (raw_my & 3) ? 3 : 0;
622 int full_my = (raw_my >> 2) + y_offset;
623 int top = full_my - filter_height_up;
624 int bottom = full_my + filter_height_down + height;
626 return FFMAX(abs(top), bottom);
629 static inline void get_lowest_part_y(H264Context *h, int refs[2][48], int n,
630 int height, int y_offset, int list0,
631 int list1, int *nrefs)
635 y_offset += 16 * (h->mb_y >> MB_FIELD(h));
638 int ref_n = h->ref_cache[0][scan8[n]];
639 Picture *ref = &h->ref_list[0][ref_n];
641 // Error resilience puts the current picture in the ref list.
642 // Don't try to wait on these as it will cause a deadlock.
643 // Fields can wait on each other, though.
644 if (ref->tf.progress->data != h->cur_pic.tf.progress->data ||
645 (ref->reference & 3) != h->picture_structure) {
646 my = get_lowest_part_list_y(h, ref, n, height, y_offset, 0);
647 if (refs[0][ref_n] < 0)
649 refs[0][ref_n] = FFMAX(refs[0][ref_n], my);
654 int ref_n = h->ref_cache[1][scan8[n]];
655 Picture *ref = &h->ref_list[1][ref_n];
657 if (ref->tf.progress->data != h->cur_pic.tf.progress->data ||
658 (ref->reference & 3) != h->picture_structure) {
659 my = get_lowest_part_list_y(h, ref, n, height, y_offset, 1);
660 if (refs[1][ref_n] < 0)
662 refs[1][ref_n] = FFMAX(refs[1][ref_n], my);
668 * Wait until all reference frames are available for MC operations.
670 * @param h the H264 context
672 static void await_references(H264Context *h)
674 const int mb_xy = h->mb_xy;
675 const int mb_type = h->cur_pic.mb_type[mb_xy];
677 int nrefs[2] = { 0 };
680 memset(refs, -1, sizeof(refs));
682 if (IS_16X16(mb_type)) {
683 get_lowest_part_y(h, refs, 0, 16, 0,
684 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
685 } else if (IS_16X8(mb_type)) {
686 get_lowest_part_y(h, refs, 0, 8, 0,
687 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
688 get_lowest_part_y(h, refs, 8, 8, 8,
689 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
690 } else if (IS_8X16(mb_type)) {
691 get_lowest_part_y(h, refs, 0, 16, 0,
692 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
693 get_lowest_part_y(h, refs, 4, 16, 0,
694 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
698 assert(IS_8X8(mb_type));
700 for (i = 0; i < 4; i++) {
701 const int sub_mb_type = h->sub_mb_type[i];
703 int y_offset = (i & 2) << 2;
705 if (IS_SUB_8X8(sub_mb_type)) {
706 get_lowest_part_y(h, refs, n, 8, y_offset,
707 IS_DIR(sub_mb_type, 0, 0),
708 IS_DIR(sub_mb_type, 0, 1),
710 } else if (IS_SUB_8X4(sub_mb_type)) {
711 get_lowest_part_y(h, refs, n, 4, y_offset,
712 IS_DIR(sub_mb_type, 0, 0),
713 IS_DIR(sub_mb_type, 0, 1),
715 get_lowest_part_y(h, refs, n + 2, 4, y_offset + 4,
716 IS_DIR(sub_mb_type, 0, 0),
717 IS_DIR(sub_mb_type, 0, 1),
719 } else if (IS_SUB_4X8(sub_mb_type)) {
720 get_lowest_part_y(h, refs, n, 8, y_offset,
721 IS_DIR(sub_mb_type, 0, 0),
722 IS_DIR(sub_mb_type, 0, 1),
724 get_lowest_part_y(h, refs, n + 1, 8, y_offset,
725 IS_DIR(sub_mb_type, 0, 0),
726 IS_DIR(sub_mb_type, 0, 1),
730 assert(IS_SUB_4X4(sub_mb_type));
731 for (j = 0; j < 4; j++) {
732 int sub_y_offset = y_offset + 2 * (j & 2);
733 get_lowest_part_y(h, refs, n + j, 4, sub_y_offset,
734 IS_DIR(sub_mb_type, 0, 0),
735 IS_DIR(sub_mb_type, 0, 1),
742 for (list = h->list_count - 1; list >= 0; list--)
743 for (ref = 0; ref < 48 && nrefs[list]; ref++) {
744 int row = refs[list][ref];
746 Picture *ref_pic = &h->ref_list[list][ref];
747 int ref_field = ref_pic->reference - 1;
748 int ref_field_picture = ref_pic->field_picture;
749 int pic_height = 16 * h->mb_height >> ref_field_picture;
754 if (!FIELD_PICTURE(h) && ref_field_picture) { // frame referencing two fields
755 ff_thread_await_progress(&ref_pic->tf,
756 FFMIN((row >> 1) - !(row & 1),
759 ff_thread_await_progress(&ref_pic->tf,
760 FFMIN((row >> 1), pic_height - 1),
762 } else if (FIELD_PICTURE(h) && !ref_field_picture) { // field referencing one field of a frame
763 ff_thread_await_progress(&ref_pic->tf,
764 FFMIN(row * 2 + ref_field,
767 } else if (FIELD_PICTURE(h)) {
768 ff_thread_await_progress(&ref_pic->tf,
769 FFMIN(row, pic_height - 1),
772 ff_thread_await_progress(&ref_pic->tf,
773 FFMIN(row, pic_height - 1),
780 static av_always_inline void mc_dir_part(H264Context *h, Picture *pic,
781 int n, int square, int height,
783 uint8_t *dest_y, uint8_t *dest_cb,
785 int src_x_offset, int src_y_offset,
786 qpel_mc_func *qpix_op,
787 h264_chroma_mc_func chroma_op,
788 int pixel_shift, int chroma_idc)
790 const int mx = h->mv_cache[list][scan8[n]][0] + src_x_offset * 8;
791 int my = h->mv_cache[list][scan8[n]][1] + src_y_offset * 8;
792 const int luma_xy = (mx & 3) + ((my & 3) << 2);
793 int offset = ((mx >> 2) << pixel_shift) + (my >> 2) * h->mb_linesize;
794 uint8_t *src_y = pic->f.data[0] + offset;
795 uint8_t *src_cb, *src_cr;
797 int extra_height = 0;
799 const int full_mx = mx >> 2;
800 const int full_my = my >> 2;
801 const int pic_width = 16 * h->mb_width;
802 const int pic_height = 16 * h->mb_height >> MB_FIELD(h);
810 if (full_mx < 0 - extra_width ||
811 full_my < 0 - extra_height ||
812 full_mx + 16 /*FIXME*/ > pic_width + extra_width ||
813 full_my + 16 /*FIXME*/ > pic_height + extra_height) {
814 h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
815 src_y - (2 << pixel_shift) - 2 * h->mb_linesize,
817 16 + 5, 16 + 5 /*FIXME*/, full_mx - 2,
818 full_my - 2, pic_width, pic_height);
819 src_y = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
823 qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); // FIXME try variable height perhaps?
825 qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
827 if (CONFIG_GRAY && h->flags & CODEC_FLAG_GRAY)
830 if (chroma_idc == 3 /* yuv444 */) {
831 src_cb = pic->f.data[1] + offset;
833 h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
834 src_cb - (2 << pixel_shift) - 2 * h->mb_linesize,
836 16 + 5, 16 + 5 /*FIXME*/,
837 full_mx - 2, full_my - 2,
838 pic_width, pic_height);
839 src_cb = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
841 qpix_op[luma_xy](dest_cb, src_cb, h->mb_linesize); // FIXME try variable height perhaps?
843 qpix_op[luma_xy](dest_cb + delta, src_cb + delta, h->mb_linesize);
845 src_cr = pic->f.data[2] + offset;
847 h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
848 src_cr - (2 << pixel_shift) - 2 * h->mb_linesize,
850 16 + 5, 16 + 5 /*FIXME*/,
851 full_mx - 2, full_my - 2,
852 pic_width, pic_height);
853 src_cr = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
855 qpix_op[luma_xy](dest_cr, src_cr, h->mb_linesize); // FIXME try variable height perhaps?
857 qpix_op[luma_xy](dest_cr + delta, src_cr + delta, h->mb_linesize);
861 ysh = 3 - (chroma_idc == 2 /* yuv422 */);
862 if (chroma_idc == 1 /* yuv420 */ && MB_FIELD(h)) {
863 // chroma offset when predicting from a field of opposite parity
864 my += 2 * ((h->mb_y & 1) - (pic->reference - 1));
865 emu |= (my >> 3) < 0 || (my >> 3) + 8 >= (pic_height >> 1);
868 src_cb = pic->f.data[1] + ((mx >> 3) << pixel_shift) +
869 (my >> ysh) * h->mb_uvlinesize;
870 src_cr = pic->f.data[2] + ((mx >> 3) << pixel_shift) +
871 (my >> ysh) * h->mb_uvlinesize;
874 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb, h->mb_uvlinesize,
875 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
876 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
877 src_cb = h->edge_emu_buffer;
879 chroma_op(dest_cb, src_cb, h->mb_uvlinesize,
880 height >> (chroma_idc == 1 /* yuv420 */),
881 mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
884 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr, h->mb_uvlinesize,
885 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
886 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
887 src_cr = h->edge_emu_buffer;
889 chroma_op(dest_cr, src_cr, h->mb_uvlinesize, height >> (chroma_idc == 1 /* yuv420 */),
890 mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
893 static av_always_inline void mc_part_std(H264Context *h, int n, int square,
894 int height, int delta,
895 uint8_t *dest_y, uint8_t *dest_cb,
897 int x_offset, int y_offset,
898 qpel_mc_func *qpix_put,
899 h264_chroma_mc_func chroma_put,
900 qpel_mc_func *qpix_avg,
901 h264_chroma_mc_func chroma_avg,
902 int list0, int list1,
903 int pixel_shift, int chroma_idc)
905 qpel_mc_func *qpix_op = qpix_put;
906 h264_chroma_mc_func chroma_op = chroma_put;
908 dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
909 if (chroma_idc == 3 /* yuv444 */) {
910 dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
911 dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
912 } else if (chroma_idc == 2 /* yuv422 */) {
913 dest_cb += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
914 dest_cr += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
915 } else { /* yuv420 */
916 dest_cb += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
917 dest_cr += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
919 x_offset += 8 * h->mb_x;
920 y_offset += 8 * (h->mb_y >> MB_FIELD(h));
923 Picture *ref = &h->ref_list[0][h->ref_cache[0][scan8[n]]];
924 mc_dir_part(h, ref, n, square, height, delta, 0,
925 dest_y, dest_cb, dest_cr, x_offset, y_offset,
926 qpix_op, chroma_op, pixel_shift, chroma_idc);
929 chroma_op = chroma_avg;
933 Picture *ref = &h->ref_list[1][h->ref_cache[1][scan8[n]]];
934 mc_dir_part(h, ref, n, square, height, delta, 1,
935 dest_y, dest_cb, dest_cr, x_offset, y_offset,
936 qpix_op, chroma_op, pixel_shift, chroma_idc);
940 static av_always_inline void mc_part_weighted(H264Context *h, int n, int square,
941 int height, int delta,
942 uint8_t *dest_y, uint8_t *dest_cb,
944 int x_offset, int y_offset,
945 qpel_mc_func *qpix_put,
946 h264_chroma_mc_func chroma_put,
947 h264_weight_func luma_weight_op,
948 h264_weight_func chroma_weight_op,
949 h264_biweight_func luma_weight_avg,
950 h264_biweight_func chroma_weight_avg,
951 int list0, int list1,
952 int pixel_shift, int chroma_idc)
956 dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
957 if (chroma_idc == 3 /* yuv444 */) {
958 chroma_height = height;
959 chroma_weight_avg = luma_weight_avg;
960 chroma_weight_op = luma_weight_op;
961 dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
962 dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
963 } else if (chroma_idc == 2 /* yuv422 */) {
964 chroma_height = height;
965 dest_cb += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
966 dest_cr += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
967 } else { /* yuv420 */
968 chroma_height = height >> 1;
969 dest_cb += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
970 dest_cr += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
972 x_offset += 8 * h->mb_x;
973 y_offset += 8 * (h->mb_y >> MB_FIELD(h));
975 if (list0 && list1) {
976 /* don't optimize for luma-only case, since B-frames usually
977 * use implicit weights => chroma too. */
978 uint8_t *tmp_cb = h->bipred_scratchpad;
979 uint8_t *tmp_cr = h->bipred_scratchpad + (16 << pixel_shift);
980 uint8_t *tmp_y = h->bipred_scratchpad + 16 * h->mb_uvlinesize;
981 int refn0 = h->ref_cache[0][scan8[n]];
982 int refn1 = h->ref_cache[1][scan8[n]];
984 mc_dir_part(h, &h->ref_list[0][refn0], n, square, height, delta, 0,
985 dest_y, dest_cb, dest_cr,
986 x_offset, y_offset, qpix_put, chroma_put,
987 pixel_shift, chroma_idc);
988 mc_dir_part(h, &h->ref_list[1][refn1], n, square, height, delta, 1,
989 tmp_y, tmp_cb, tmp_cr,
990 x_offset, y_offset, qpix_put, chroma_put,
991 pixel_shift, chroma_idc);
993 if (h->use_weight == 2) {
994 int weight0 = h->implicit_weight[refn0][refn1][h->mb_y & 1];
995 int weight1 = 64 - weight0;
996 luma_weight_avg(dest_y, tmp_y, h->mb_linesize,
997 height, 5, weight0, weight1, 0);
998 chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize,
999 chroma_height, 5, weight0, weight1, 0);
1000 chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize,
1001 chroma_height, 5, weight0, weight1, 0);
1003 luma_weight_avg(dest_y, tmp_y, h->mb_linesize, height,
1004 h->luma_log2_weight_denom,
1005 h->luma_weight[refn0][0][0],
1006 h->luma_weight[refn1][1][0],
1007 h->luma_weight[refn0][0][1] +
1008 h->luma_weight[refn1][1][1]);
1009 chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, chroma_height,
1010 h->chroma_log2_weight_denom,
1011 h->chroma_weight[refn0][0][0][0],
1012 h->chroma_weight[refn1][1][0][0],
1013 h->chroma_weight[refn0][0][0][1] +
1014 h->chroma_weight[refn1][1][0][1]);
1015 chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, chroma_height,
1016 h->chroma_log2_weight_denom,
1017 h->chroma_weight[refn0][0][1][0],
1018 h->chroma_weight[refn1][1][1][0],
1019 h->chroma_weight[refn0][0][1][1] +
1020 h->chroma_weight[refn1][1][1][1]);
1023 int list = list1 ? 1 : 0;
1024 int refn = h->ref_cache[list][scan8[n]];
1025 Picture *ref = &h->ref_list[list][refn];
1026 mc_dir_part(h, ref, n, square, height, delta, list,
1027 dest_y, dest_cb, dest_cr, x_offset, y_offset,
1028 qpix_put, chroma_put, pixel_shift, chroma_idc);
1030 luma_weight_op(dest_y, h->mb_linesize, height,
1031 h->luma_log2_weight_denom,
1032 h->luma_weight[refn][list][0],
1033 h->luma_weight[refn][list][1]);
1034 if (h->use_weight_chroma) {
1035 chroma_weight_op(dest_cb, h->mb_uvlinesize, chroma_height,
1036 h->chroma_log2_weight_denom,
1037 h->chroma_weight[refn][list][0][0],
1038 h->chroma_weight[refn][list][0][1]);
1039 chroma_weight_op(dest_cr, h->mb_uvlinesize, chroma_height,
1040 h->chroma_log2_weight_denom,
1041 h->chroma_weight[refn][list][1][0],
1042 h->chroma_weight[refn][list][1][1]);
1047 static av_always_inline void prefetch_motion(H264Context *h, int list,
1048 int pixel_shift, int chroma_idc)
1050 /* fetch pixels for estimated mv 4 macroblocks ahead
1051 * optimized for 64byte cache lines */
1052 const int refn = h->ref_cache[list][scan8[0]];
1054 const int mx = (h->mv_cache[list][scan8[0]][0] >> 2) + 16 * h->mb_x + 8;
1055 const int my = (h->mv_cache[list][scan8[0]][1] >> 2) + 16 * h->mb_y;
1056 uint8_t **src = h->ref_list[list][refn].f.data;
1057 int off = (mx << pixel_shift) +
1058 (my + (h->mb_x & 3) * 4) * h->mb_linesize +
1059 (64 << pixel_shift);
1060 h->vdsp.prefetch(src[0] + off, h->linesize, 4);
1061 if (chroma_idc == 3 /* yuv444 */) {
1062 h->vdsp.prefetch(src[1] + off, h->linesize, 4);
1063 h->vdsp.prefetch(src[2] + off, h->linesize, 4);
1065 off = ((mx >> 1) << pixel_shift) +
1066 ((my >> 1) + (h->mb_x & 7)) * h->uvlinesize +
1067 (64 << pixel_shift);
1068 h->vdsp.prefetch(src[1] + off, src[2] - src[1], 2);
1073 static void free_tables(H264Context *h, int free_rbsp)
1078 av_freep(&h->intra4x4_pred_mode);
1079 av_freep(&h->chroma_pred_mode_table);
1080 av_freep(&h->cbp_table);
1081 av_freep(&h->mvd_table[0]);
1082 av_freep(&h->mvd_table[1]);
1083 av_freep(&h->direct_table);
1084 av_freep(&h->non_zero_count);
1085 av_freep(&h->slice_table_base);
1086 h->slice_table = NULL;
1087 av_freep(&h->list_counts);
1089 av_freep(&h->mb2b_xy);
1090 av_freep(&h->mb2br_xy);
1092 av_buffer_pool_uninit(&h->qscale_table_pool);
1093 av_buffer_pool_uninit(&h->mb_type_pool);
1094 av_buffer_pool_uninit(&h->motion_val_pool);
1095 av_buffer_pool_uninit(&h->ref_index_pool);
1097 if (free_rbsp && h->DPB) {
1098 for (i = 0; i < MAX_PICTURE_COUNT; i++)
1099 unref_picture(h, &h->DPB[i]);
1101 } else if (h->DPB) {
1102 for (i = 0; i < MAX_PICTURE_COUNT; i++)
1103 h->DPB[i].needs_realloc = 1;
1106 h->cur_pic_ptr = NULL;
1108 for (i = 0; i < MAX_THREADS; i++) {
1109 hx = h->thread_context[i];
1112 av_freep(&hx->top_borders[1]);
1113 av_freep(&hx->top_borders[0]);
1114 av_freep(&hx->bipred_scratchpad);
1115 av_freep(&hx->edge_emu_buffer);
1116 av_freep(&hx->dc_val_base);
1117 av_freep(&hx->me.scratchpad);
1118 av_freep(&hx->er.mb_index2xy);
1119 av_freep(&hx->er.error_status_table);
1120 av_freep(&hx->er.er_temp_buffer);
1121 av_freep(&hx->er.mbintra_table);
1122 av_freep(&hx->er.mbskip_table);
1125 av_freep(&hx->rbsp_buffer[1]);
1126 av_freep(&hx->rbsp_buffer[0]);
1127 hx->rbsp_buffer_size[0] = 0;
1128 hx->rbsp_buffer_size[1] = 0;
1131 av_freep(&h->thread_context[i]);
1135 static void init_dequant8_coeff_table(H264Context *h)
1138 const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
1140 for (i = 0; i < 6; i++) {
1141 h->dequant8_coeff[i] = h->dequant8_buffer[i];
1142 for (j = 0; j < i; j++)
1143 if (!memcmp(h->pps.scaling_matrix8[j], h->pps.scaling_matrix8[i],
1144 64 * sizeof(uint8_t))) {
1145 h->dequant8_coeff[i] = h->dequant8_buffer[j];
1151 for (q = 0; q < max_qp + 1; q++) {
1152 int shift = div6[q];
1154 for (x = 0; x < 64; x++)
1155 h->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
1156 ((uint32_t)dequant8_coeff_init[idx][dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
1157 h->pps.scaling_matrix8[i][x]) << shift;
1162 static void init_dequant4_coeff_table(H264Context *h)
1165 const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
1166 for (i = 0; i < 6; i++) {
1167 h->dequant4_coeff[i] = h->dequant4_buffer[i];
1168 for (j = 0; j < i; j++)
1169 if (!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i],
1170 16 * sizeof(uint8_t))) {
1171 h->dequant4_coeff[i] = h->dequant4_buffer[j];
1177 for (q = 0; q < max_qp + 1; q++) {
1178 int shift = div6[q] + 2;
1180 for (x = 0; x < 16; x++)
1181 h->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
1182 ((uint32_t)dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
1183 h->pps.scaling_matrix4[i][x]) << shift;
1188 static void init_dequant_tables(H264Context *h)
1191 init_dequant4_coeff_table(h);
1192 if (h->pps.transform_8x8_mode)
1193 init_dequant8_coeff_table(h);
1194 if (h->sps.transform_bypass) {
1195 for (i = 0; i < 6; i++)
1196 for (x = 0; x < 16; x++)
1197 h->dequant4_coeff[i][0][x] = 1 << 6;
1198 if (h->pps.transform_8x8_mode)
1199 for (i = 0; i < 6; i++)
1200 for (x = 0; x < 64; x++)
1201 h->dequant8_coeff[i][0][x] = 1 << 6;
1205 int ff_h264_alloc_tables(H264Context *h)
1207 const int big_mb_num = h->mb_stride * (h->mb_height + 1);
1208 const int row_mb_num = h->mb_stride * 2 * h->avctx->thread_count;
1211 FF_ALLOCZ_OR_GOTO(h->avctx, h->intra4x4_pred_mode,
1212 row_mb_num * 8 * sizeof(uint8_t), fail)
1213 FF_ALLOCZ_OR_GOTO(h->avctx, h->non_zero_count,
1214 big_mb_num * 48 * sizeof(uint8_t), fail)
1215 FF_ALLOCZ_OR_GOTO(h->avctx, h->slice_table_base,
1216 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
1217 FF_ALLOCZ_OR_GOTO(h->avctx, h->cbp_table,
1218 big_mb_num * sizeof(uint16_t), fail)
1219 FF_ALLOCZ_OR_GOTO(h->avctx, h->chroma_pred_mode_table,
1220 big_mb_num * sizeof(uint8_t), fail)
1221 FF_ALLOCZ_OR_GOTO(h->avctx, h->mvd_table[0],
1222 16 * row_mb_num * sizeof(uint8_t), fail);
1223 FF_ALLOCZ_OR_GOTO(h->avctx, h->mvd_table[1],
1224 16 * row_mb_num * sizeof(uint8_t), fail);
1225 FF_ALLOCZ_OR_GOTO(h->avctx, h->direct_table,
1226 4 * big_mb_num * sizeof(uint8_t), fail);
1227 FF_ALLOCZ_OR_GOTO(h->avctx, h->list_counts,
1228 big_mb_num * sizeof(uint8_t), fail)
1230 memset(h->slice_table_base, -1,
1231 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
1232 h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
1234 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2b_xy,
1235 big_mb_num * sizeof(uint32_t), fail);
1236 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2br_xy,
1237 big_mb_num * sizeof(uint32_t), fail);
1238 for (y = 0; y < h->mb_height; y++)
1239 for (x = 0; x < h->mb_width; x++) {
1240 const int mb_xy = x + y * h->mb_stride;
1241 const int b_xy = 4 * x + 4 * y * h->b_stride;
1243 h->mb2b_xy[mb_xy] = b_xy;
1244 h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
1247 if (!h->dequant4_coeff[0])
1248 init_dequant_tables(h);
1251 h->DPB = av_mallocz_array(MAX_PICTURE_COUNT, sizeof(*h->DPB));
1253 return AVERROR(ENOMEM);
1254 for (i = 0; i < MAX_PICTURE_COUNT; i++)
1255 avcodec_get_frame_defaults(&h->DPB[i].f);
1256 avcodec_get_frame_defaults(&h->cur_pic.f);
1267 * Mimic alloc_tables(), but for every context thread.
1269 static void clone_tables(H264Context *dst, H264Context *src, int i)
1271 dst->intra4x4_pred_mode = src->intra4x4_pred_mode + i * 8 * 2 * src->mb_stride;
1272 dst->non_zero_count = src->non_zero_count;
1273 dst->slice_table = src->slice_table;
1274 dst->cbp_table = src->cbp_table;
1275 dst->mb2b_xy = src->mb2b_xy;
1276 dst->mb2br_xy = src->mb2br_xy;
1277 dst->chroma_pred_mode_table = src->chroma_pred_mode_table;
1278 dst->mvd_table[0] = src->mvd_table[0] + i * 8 * 2 * src->mb_stride;
1279 dst->mvd_table[1] = src->mvd_table[1] + i * 8 * 2 * src->mb_stride;
1280 dst->direct_table = src->direct_table;
1281 dst->list_counts = src->list_counts;
1282 dst->DPB = src->DPB;
1283 dst->cur_pic_ptr = src->cur_pic_ptr;
1284 dst->cur_pic = src->cur_pic;
1285 dst->bipred_scratchpad = NULL;
1286 dst->edge_emu_buffer = NULL;
1287 dst->me.scratchpad = NULL;
1288 ff_h264_pred_init(&dst->hpc, src->avctx->codec_id, src->sps.bit_depth_luma,
1289 src->sps.chroma_format_idc);
1294 * Allocate buffers which are not shared amongst multiple threads.
1296 static int context_init(H264Context *h)
1298 ERContext *er = &h->er;
1299 int mb_array_size = h->mb_height * h->mb_stride;
1300 int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
1301 int c_size = h->mb_stride * (h->mb_height + 1);
1302 int yc_size = y_size + 2 * c_size;
1305 FF_ALLOCZ_OR_GOTO(h->avctx, h->top_borders[0],
1306 h->mb_width * 16 * 3 * sizeof(uint8_t) * 2, fail)
1307 FF_ALLOCZ_OR_GOTO(h->avctx, h->top_borders[1],
1308 h->mb_width * 16 * 3 * sizeof(uint8_t) * 2, fail)
1310 h->ref_cache[0][scan8[5] + 1] =
1311 h->ref_cache[0][scan8[7] + 1] =
1312 h->ref_cache[0][scan8[13] + 1] =
1313 h->ref_cache[1][scan8[5] + 1] =
1314 h->ref_cache[1][scan8[7] + 1] =
1315 h->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
1317 if (CONFIG_ERROR_RESILIENCE) {
1319 er->avctx = h->avctx;
1321 er->decode_mb = h264_er_decode_mb;
1323 er->quarter_sample = 1;
1325 er->mb_num = h->mb_num;
1326 er->mb_width = h->mb_width;
1327 er->mb_height = h->mb_height;
1328 er->mb_stride = h->mb_stride;
1329 er->b8_stride = h->mb_width * 2 + 1;
1331 FF_ALLOCZ_OR_GOTO(h->avctx, er->mb_index2xy, (h->mb_num + 1) * sizeof(int),
1332 fail); // error ressilience code looks cleaner with this
1333 for (y = 0; y < h->mb_height; y++)
1334 for (x = 0; x < h->mb_width; x++)
1335 er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
1337 er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
1338 h->mb_stride + h->mb_width;
1340 FF_ALLOCZ_OR_GOTO(h->avctx, er->error_status_table,
1341 mb_array_size * sizeof(uint8_t), fail);
1343 FF_ALLOC_OR_GOTO(h->avctx, er->mbintra_table, mb_array_size, fail);
1344 memset(er->mbintra_table, 1, mb_array_size);
1346 FF_ALLOCZ_OR_GOTO(h->avctx, er->mbskip_table, mb_array_size + 2, fail);
1348 FF_ALLOC_OR_GOTO(h->avctx, er->er_temp_buffer, h->mb_height * h->mb_stride,
1351 FF_ALLOCZ_OR_GOTO(h->avctx, h->dc_val_base, yc_size * sizeof(int16_t), fail);
1352 er->dc_val[0] = h->dc_val_base + h->mb_width * 2 + 2;
1353 er->dc_val[1] = h->dc_val_base + y_size + h->mb_stride + 1;
1354 er->dc_val[2] = er->dc_val[1] + c_size;
1355 for (i = 0; i < yc_size; i++)
1356 h->dc_val_base[i] = 1024;
1362 return -1; // free_tables will clean up for us
1365 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
1366 int parse_extradata);
1368 int ff_h264_decode_extradata(H264Context *h)
1370 AVCodecContext *avctx = h->avctx;
1372 if (avctx->extradata[0] == 1) {
1373 int i, cnt, nalsize;
1374 unsigned char *p = avctx->extradata;
1378 if (avctx->extradata_size < 7) {
1379 av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
1382 /* sps and pps in the avcC always have length coded with 2 bytes,
1383 * so put a fake nal_length_size = 2 while parsing them */
1384 h->nal_length_size = 2;
1385 // Decode sps from avcC
1386 cnt = *(p + 5) & 0x1f; // Number of sps
1388 for (i = 0; i < cnt; i++) {
1389 nalsize = AV_RB16(p) + 2;
1390 if (p - avctx->extradata + nalsize > avctx->extradata_size)
1392 if (decode_nal_units(h, p, nalsize, 1) < 0) {
1393 av_log(avctx, AV_LOG_ERROR,
1394 "Decoding sps %d from avcC failed\n", i);
1399 // Decode pps from avcC
1400 cnt = *(p++); // Number of pps
1401 for (i = 0; i < cnt; i++) {
1402 nalsize = AV_RB16(p) + 2;
1403 if (p - avctx->extradata + nalsize > avctx->extradata_size)
1405 if (decode_nal_units(h, p, nalsize, 1) < 0) {
1406 av_log(avctx, AV_LOG_ERROR,
1407 "Decoding pps %d from avcC failed\n", i);
1412 // Now store right nal length size, that will be used to parse all other nals
1413 h->nal_length_size = (avctx->extradata[4] & 0x03) + 1;
1416 if (decode_nal_units(h, avctx->extradata, avctx->extradata_size, 1) < 0)
1422 av_cold int ff_h264_decode_init(AVCodecContext *avctx)
1424 H264Context *h = avctx->priv_data;
1429 h->bit_depth_luma = 8;
1430 h->chroma_format_idc = 1;
1432 ff_h264dsp_init(&h->h264dsp, 8, 1);
1433 ff_h264chroma_init(&h->h264chroma, h->sps.bit_depth_chroma);
1434 ff_h264qpel_init(&h->h264qpel, 8);
1435 ff_h264_pred_init(&h->hpc, h->avctx->codec_id, 8, 1);
1437 h->dequant_coeff_pps = -1;
1439 /* needed so that IDCT permutation is known early */
1440 if (CONFIG_ERROR_RESILIENCE)
1441 ff_dsputil_init(&h->dsp, h->avctx);
1442 ff_videodsp_init(&h->vdsp, 8);
1444 memset(h->pps.scaling_matrix4, 16, 6 * 16 * sizeof(uint8_t));
1445 memset(h->pps.scaling_matrix8, 16, 2 * 64 * sizeof(uint8_t));
1447 h->picture_structure = PICT_FRAME;
1448 h->slice_context_count = 1;
1449 h->workaround_bugs = avctx->workaround_bugs;
1450 h->flags = avctx->flags;
1453 // s->decode_mb = ff_h263_decode_mb;
1454 if (!avctx->has_b_frames)
1457 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1459 ff_h264_decode_init_vlc();
1462 h->sps.bit_depth_luma = avctx->bits_per_raw_sample = 8;
1464 h->thread_context[0] = h;
1465 h->outputed_poc = h->next_outputed_poc = INT_MIN;
1466 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
1467 h->last_pocs[i] = INT_MIN;
1468 h->prev_poc_msb = 1 << 16;
1470 ff_h264_reset_sei(h);
1471 if (avctx->codec_id == AV_CODEC_ID_H264) {
1472 if (avctx->ticks_per_frame == 1)
1473 h->avctx->time_base.den *= 2;
1474 avctx->ticks_per_frame = 2;
1477 if (avctx->extradata_size > 0 && avctx->extradata &&
1478 ff_h264_decode_extradata(h))
1481 if (h->sps.bitstream_restriction_flag &&
1482 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
1483 h->avctx->has_b_frames = h->sps.num_reorder_frames;
1487 avctx->internal->allocate_progress = 1;
1492 #define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b) + (size))))
1493 #undef REBASE_PICTURE
1494 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
1495 ((pic && pic >= old_ctx->DPB && \
1496 pic < old_ctx->DPB + MAX_PICTURE_COUNT) ? \
1497 &new_ctx->DPB[pic - old_ctx->DPB] : NULL)
1499 static void copy_picture_range(Picture **to, Picture **from, int count,
1500 H264Context *new_base,
1501 H264Context *old_base)
1505 for (i = 0; i < count; i++) {
1506 assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
1507 IN_RANGE(from[i], old_base->DPB,
1508 sizeof(Picture) * MAX_PICTURE_COUNT) ||
1510 to[i] = REBASE_PICTURE(from[i], new_base, old_base);
1514 static void copy_parameter_set(void **to, void **from, int count, int size)
1518 for (i = 0; i < count; i++) {
1519 if (to[i] && !from[i])
1521 else if (from[i] && !to[i])
1522 to[i] = av_malloc(size);
1525 memcpy(to[i], from[i], size);
1529 static int decode_init_thread_copy(AVCodecContext *avctx)
1531 H264Context *h = avctx->priv_data;
1533 if (!avctx->internal->is_copy)
1535 memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
1536 memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
1538 h->context_initialized = 0;
1543 #define copy_fields(to, from, start_field, end_field) \
1544 memcpy(&to->start_field, &from->start_field, \
1545 (char *)&to->end_field - (char *)&to->start_field)
1547 static int h264_slice_header_init(H264Context *, int);
1549 static int h264_set_parameter_from_sps(H264Context *h);
1551 static int decode_update_thread_context(AVCodecContext *dst,
1552 const AVCodecContext *src)
1554 H264Context *h = dst->priv_data, *h1 = src->priv_data;
1555 int inited = h->context_initialized, err = 0;
1556 int context_reinitialized = 0;
1559 if (dst == src || !h1->context_initialized)
1563 (h->width != h1->width ||
1564 h->height != h1->height ||
1565 h->mb_width != h1->mb_width ||
1566 h->mb_height != h1->mb_height ||
1567 h->sps.bit_depth_luma != h1->sps.bit_depth_luma ||
1568 h->sps.chroma_format_idc != h1->sps.chroma_format_idc ||
1569 h->sps.colorspace != h1->sps.colorspace)) {
1571 /* set bits_per_raw_sample to the previous value. the check for changed
1572 * bit depth in h264_set_parameter_from_sps() uses it and sets it to
1573 * the current value */
1574 h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
1576 av_freep(&h->bipred_scratchpad);
1578 h->width = h1->width;
1579 h->height = h1->height;
1580 h->mb_height = h1->mb_height;
1581 h->mb_width = h1->mb_width;
1582 h->mb_num = h1->mb_num;
1583 h->mb_stride = h1->mb_stride;
1584 h->b_stride = h1->b_stride;
1586 if ((err = h264_slice_header_init(h, 1)) < 0) {
1587 av_log(h->avctx, AV_LOG_ERROR, "h264_slice_header_init() failed");
1590 context_reinitialized = 1;
1592 /* update linesize on resize. The decoder doesn't
1593 * necessarily call h264_frame_start in the new thread */
1594 h->linesize = h1->linesize;
1595 h->uvlinesize = h1->uvlinesize;
1597 /* copy block_offset since frame_start may not be called */
1598 memcpy(h->block_offset, h1->block_offset, sizeof(h->block_offset));
1602 for (i = 0; i < MAX_SPS_COUNT; i++)
1603 av_freep(h->sps_buffers + i);
1605 for (i = 0; i < MAX_PPS_COUNT; i++)
1606 av_freep(h->pps_buffers + i);
1608 memcpy(h, h1, sizeof(*h1));
1609 memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
1610 memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
1611 memset(&h->er, 0, sizeof(h->er));
1612 memset(&h->me, 0, sizeof(h->me));
1613 memset(&h->mb, 0, sizeof(h->mb));
1614 memset(&h->mb_luma_dc, 0, sizeof(h->mb_luma_dc));
1615 memset(&h->mb_padding, 0, sizeof(h->mb_padding));
1616 h->context_initialized = 0;
1618 memset(&h->cur_pic, 0, sizeof(h->cur_pic));
1619 avcodec_get_frame_defaults(&h->cur_pic.f);
1620 h->cur_pic.tf.f = &h->cur_pic.f;
1624 h->qscale_table_pool = NULL;
1625 h->mb_type_pool = NULL;
1626 h->ref_index_pool = NULL;
1627 h->motion_val_pool = NULL;
1629 if (ff_h264_alloc_tables(h) < 0) {
1630 av_log(dst, AV_LOG_ERROR, "Could not allocate memory for h264\n");
1631 return AVERROR(ENOMEM);
1635 for (i = 0; i < 2; i++) {
1636 h->rbsp_buffer[i] = NULL;
1637 h->rbsp_buffer_size[i] = 0;
1639 h->bipred_scratchpad = NULL;
1640 h->edge_emu_buffer = NULL;
1642 h->thread_context[0] = h;
1644 h->context_initialized = 1;
1647 h->avctx->coded_height = h1->avctx->coded_height;
1648 h->avctx->coded_width = h1->avctx->coded_width;
1649 h->avctx->width = h1->avctx->width;
1650 h->avctx->height = h1->avctx->height;
1651 h->coded_picture_number = h1->coded_picture_number;
1652 h->first_field = h1->first_field;
1653 h->picture_structure = h1->picture_structure;
1654 h->qscale = h1->qscale;
1655 h->droppable = h1->droppable;
1656 h->data_partitioning = h1->data_partitioning;
1657 h->low_delay = h1->low_delay;
1659 for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1660 unref_picture(h, &h->DPB[i]);
1661 if (h1->DPB[i].f.data[0] &&
1662 (ret = ref_picture(h, &h->DPB[i], &h1->DPB[i])) < 0)
1666 h->cur_pic_ptr = REBASE_PICTURE(h1->cur_pic_ptr, h, h1);
1667 unref_picture(h, &h->cur_pic);
1668 if ((ret = ref_picture(h, &h->cur_pic, &h1->cur_pic)) < 0)
1671 h->workaround_bugs = h1->workaround_bugs;
1672 h->low_delay = h1->low_delay;
1673 h->droppable = h1->droppable;
1675 /* frame_start may not be called for the next thread (if it's decoding
1676 * a bottom field) so this has to be allocated here */
1677 err = alloc_scratch_buffers(h, h1->linesize);
1681 // extradata/NAL handling
1682 h->is_avc = h1->is_avc;
1685 copy_parameter_set((void **)h->sps_buffers, (void **)h1->sps_buffers,
1686 MAX_SPS_COUNT, sizeof(SPS));
1688 copy_parameter_set((void **)h->pps_buffers, (void **)h1->pps_buffers,
1689 MAX_PPS_COUNT, sizeof(PPS));
1692 // Dequantization matrices
1693 // FIXME these are big - can they be only copied when PPS changes?
1694 copy_fields(h, h1, dequant4_buffer, dequant4_coeff);
1696 for (i = 0; i < 6; i++)
1697 h->dequant4_coeff[i] = h->dequant4_buffer[0] +
1698 (h1->dequant4_coeff[i] - h1->dequant4_buffer[0]);
1700 for (i = 0; i < 6; i++)
1701 h->dequant8_coeff[i] = h->dequant8_buffer[0] +
1702 (h1->dequant8_coeff[i] - h1->dequant8_buffer[0]);
1704 h->dequant_coeff_pps = h1->dequant_coeff_pps;
1707 copy_fields(h, h1, poc_lsb, redundant_pic_count);
1710 copy_fields(h, h1, short_ref, cabac_init_idc);
1712 copy_picture_range(h->short_ref, h1->short_ref, 32, h, h1);
1713 copy_picture_range(h->long_ref, h1->long_ref, 32, h, h1);
1714 copy_picture_range(h->delayed_pic, h1->delayed_pic,
1715 MAX_DELAYED_PIC_COUNT + 2, h, h1);
1717 h->last_slice_type = h1->last_slice_type;
1719 if (context_reinitialized)
1720 h264_set_parameter_from_sps(h);
1722 if (!h->cur_pic_ptr)
1725 if (!h->droppable) {
1726 err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1727 h->prev_poc_msb = h->poc_msb;
1728 h->prev_poc_lsb = h->poc_lsb;
1730 h->prev_frame_num_offset = h->frame_num_offset;
1731 h->prev_frame_num = h->frame_num;
1732 h->outputed_poc = h->next_outputed_poc;
1737 static int h264_frame_start(H264Context *h)
1741 const int pixel_shift = h->pixel_shift;
1743 release_unused_pictures(h, 1);
1744 h->cur_pic_ptr = NULL;
1746 i = find_unused_picture(h);
1748 av_log(h->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1753 pic->reference = h->droppable ? 0 : h->picture_structure;
1754 pic->f.coded_picture_number = h->coded_picture_number++;
1755 pic->field_picture = h->picture_structure != PICT_FRAME;
1757 * Zero key_frame here; IDR markings per slice in frame or fields are ORed
1759 * See decode_nal_units().
1761 pic->f.key_frame = 0;
1762 pic->mmco_reset = 0;
1764 if ((ret = alloc_picture(h, pic)) < 0)
1767 h->cur_pic_ptr = pic;
1768 unref_picture(h, &h->cur_pic);
1769 if ((ret = ref_picture(h, &h->cur_pic, h->cur_pic_ptr)) < 0)
1772 if (CONFIG_ERROR_RESILIENCE)
1773 ff_er_frame_start(&h->er);
1775 assert(h->linesize && h->uvlinesize);
1777 for (i = 0; i < 16; i++) {
1778 h->block_offset[i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * h->linesize * ((scan8[i] - scan8[0]) >> 3);
1779 h->block_offset[48 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * h->linesize * ((scan8[i] - scan8[0]) >> 3);
1781 for (i = 0; i < 16; i++) {
1782 h->block_offset[16 + i] =
1783 h->block_offset[32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * h->uvlinesize * ((scan8[i] - scan8[0]) >> 3);
1784 h->block_offset[48 + 16 + i] =
1785 h->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * h->uvlinesize * ((scan8[i] - scan8[0]) >> 3);
1788 /* can't be in alloc_tables because linesize isn't known there.
1789 * FIXME: redo bipred weight to not require extra buffer? */
1790 for (i = 0; i < h->slice_context_count; i++)
1791 if (h->thread_context[i]) {
1792 ret = alloc_scratch_buffers(h->thread_context[i], h->linesize);
1797 /* Some macroblocks can be accessed before they're available in case
1798 * of lost slices, MBAFF or threading. */
1799 memset(h->slice_table, -1,
1800 (h->mb_height * h->mb_stride - 1) * sizeof(*h->slice_table));
1802 // s->decode = (s->flags & CODEC_FLAG_PSNR) || !s->encoding ||
1803 // s->current_picture.f.reference /* || h->contains_intra */ || 1;
1805 /* We mark the current picture as non-reference after allocating it, so
1806 * that if we break out due to an error it can be released automatically
1807 * in the next ff_MPV_frame_start().
1809 h->cur_pic_ptr->reference = 0;
1811 h->cur_pic_ptr->field_poc[0] = h->cur_pic_ptr->field_poc[1] = INT_MAX;
1813 h->next_output_pic = NULL;
1815 assert(h->cur_pic_ptr->long_ref == 0);
1821 * Run setup operations that must be run after slice header decoding.
1822 * This includes finding the next displayed frame.
1824 * @param h h264 master context
1825 * @param setup_finished enough NALs have been read that we can call
1826 * ff_thread_finish_setup()
1828 static void decode_postinit(H264Context *h, int setup_finished)
1830 Picture *out = h->cur_pic_ptr;
1831 Picture *cur = h->cur_pic_ptr;
1832 int i, pics, out_of_order, out_idx;
1833 int invalid = 0, cnt = 0;
1835 h->cur_pic_ptr->f.pict_type = h->pict_type;
1837 if (h->next_output_pic)
1840 if (cur->field_poc[0] == INT_MAX || cur->field_poc[1] == INT_MAX) {
1841 /* FIXME: if we have two PAFF fields in one packet, we can't start
1842 * the next thread here. If we have one field per packet, we can.
1843 * The check in decode_nal_units() is not good enough to find this
1844 * yet, so we assume the worst for now. */
1845 // if (setup_finished)
1846 // ff_thread_finish_setup(h->avctx);
1850 cur->f.interlaced_frame = 0;
1851 cur->f.repeat_pict = 0;
1853 /* Signal interlacing information externally. */
1854 /* Prioritize picture timing SEI information over used
1855 * decoding process if it exists. */
1857 if (h->sps.pic_struct_present_flag) {
1858 switch (h->sei_pic_struct) {
1859 case SEI_PIC_STRUCT_FRAME:
1861 case SEI_PIC_STRUCT_TOP_FIELD:
1862 case SEI_PIC_STRUCT_BOTTOM_FIELD:
1863 cur->f.interlaced_frame = 1;
1865 case SEI_PIC_STRUCT_TOP_BOTTOM:
1866 case SEI_PIC_STRUCT_BOTTOM_TOP:
1867 if (FIELD_OR_MBAFF_PICTURE(h))
1868 cur->f.interlaced_frame = 1;
1870 // try to flag soft telecine progressive
1871 cur->f.interlaced_frame = h->prev_interlaced_frame;
1873 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
1874 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
1875 /* Signal the possibility of telecined film externally
1876 * (pic_struct 5,6). From these hints, let the applications
1877 * decide if they apply deinterlacing. */
1878 cur->f.repeat_pict = 1;
1880 case SEI_PIC_STRUCT_FRAME_DOUBLING:
1881 cur->f.repeat_pict = 2;
1883 case SEI_PIC_STRUCT_FRAME_TRIPLING:
1884 cur->f.repeat_pict = 4;
1888 if ((h->sei_ct_type & 3) &&
1889 h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
1890 cur->f.interlaced_frame = (h->sei_ct_type & (1 << 1)) != 0;
1892 /* Derive interlacing flag from used decoding process. */
1893 cur->f.interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
1895 h->prev_interlaced_frame = cur->f.interlaced_frame;
1897 if (cur->field_poc[0] != cur->field_poc[1]) {
1898 /* Derive top_field_first from field pocs. */
1899 cur->f.top_field_first = cur->field_poc[0] < cur->field_poc[1];
1901 if (cur->f.interlaced_frame || h->sps.pic_struct_present_flag) {
1902 /* Use picture timing SEI information. Even if it is a
1903 * information of a past frame, better than nothing. */
1904 if (h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
1905 h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
1906 cur->f.top_field_first = 1;
1908 cur->f.top_field_first = 0;
1910 /* Most likely progressive */
1911 cur->f.top_field_first = 0;
1915 // FIXME do something with unavailable reference frames
1917 /* Sort B-frames into display order */
1919 if (h->sps.bitstream_restriction_flag &&
1920 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
1921 h->avctx->has_b_frames = h->sps.num_reorder_frames;
1925 if (h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT &&
1926 !h->sps.bitstream_restriction_flag) {
1927 h->avctx->has_b_frames = MAX_DELAYED_PIC_COUNT - 1;
1932 while (h->delayed_pic[pics])
1935 assert(pics <= MAX_DELAYED_PIC_COUNT);
1937 h->delayed_pic[pics++] = cur;
1938 if (cur->reference == 0)
1939 cur->reference = DELAYED_PIC_REF;
1941 /* Frame reordering. This code takes pictures from coding order and sorts
1942 * them by their incremental POC value into display order. It supports POC
1943 * gaps, MMCO reset codes and random resets.
1944 * A "display group" can start either with a IDR frame (f.key_frame = 1),
1945 * and/or can be closed down with a MMCO reset code. In sequences where
1946 * there is no delay, we can't detect that (since the frame was already
1947 * output to the user), so we also set h->mmco_reset to detect the MMCO
1949 * FIXME: if we detect insufficient delays (as per h->avctx->has_b_frames),
1950 * we increase the delay between input and output. All frames affected by
1951 * the lag (e.g. those that should have been output before another frame
1952 * that we already returned to the user) will be dropped. This is a bug
1953 * that we will fix later. */
1954 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++) {
1955 cnt += out->poc < h->last_pocs[i];
1956 invalid += out->poc == INT_MIN;
1958 if (!h->mmco_reset && !cur->f.key_frame &&
1959 cnt + invalid == MAX_DELAYED_PIC_COUNT && cnt > 0) {
1962 h->delayed_pic[pics - 2]->mmco_reset = 2;
1964 if (h->mmco_reset || cur->f.key_frame) {
1965 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
1966 h->last_pocs[i] = INT_MIN;
1968 invalid = MAX_DELAYED_PIC_COUNT;
1970 out = h->delayed_pic[0];
1972 for (i = 1; i < MAX_DELAYED_PIC_COUNT &&
1973 h->delayed_pic[i] &&
1974 !h->delayed_pic[i - 1]->mmco_reset &&
1975 !h->delayed_pic[i]->f.key_frame;
1977 if (h->delayed_pic[i]->poc < out->poc) {
1978 out = h->delayed_pic[i];
1981 if (h->avctx->has_b_frames == 0 &&
1982 (h->delayed_pic[0]->f.key_frame || h->mmco_reset))
1983 h->next_outputed_poc = INT_MIN;
1984 out_of_order = !out->f.key_frame && !h->mmco_reset &&
1985 (out->poc < h->next_outputed_poc);
1987 if (h->sps.bitstream_restriction_flag &&
1988 h->avctx->has_b_frames >= h->sps.num_reorder_frames) {
1989 } else if (out_of_order && pics - 1 == h->avctx->has_b_frames &&
1990 h->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT) {
1991 if (invalid + cnt < MAX_DELAYED_PIC_COUNT) {
1992 h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames, cnt);
1995 } else if (h->low_delay &&
1996 ((h->next_outputed_poc != INT_MIN &&
1997 out->poc > h->next_outputed_poc + 2) ||
1998 cur->f.pict_type == AV_PICTURE_TYPE_B)) {
2000 h->avctx->has_b_frames++;
2003 if (pics > h->avctx->has_b_frames) {
2004 out->reference &= ~DELAYED_PIC_REF;
2005 // for frame threading, the owner must be the second field's thread or
2006 // else the first thread can release the picture and reuse it unsafely
2007 for (i = out_idx; h->delayed_pic[i]; i++)
2008 h->delayed_pic[i] = h->delayed_pic[i + 1];
2010 memmove(h->last_pocs, &h->last_pocs[1],
2011 sizeof(*h->last_pocs) * (MAX_DELAYED_PIC_COUNT - 1));
2012 h->last_pocs[MAX_DELAYED_PIC_COUNT - 1] = cur->poc;
2013 if (!out_of_order && pics > h->avctx->has_b_frames) {
2014 h->next_output_pic = out;
2015 if (out->mmco_reset) {
2017 h->next_outputed_poc = out->poc;
2018 h->delayed_pic[out_idx - 1]->mmco_reset = out->mmco_reset;
2020 h->next_outputed_poc = INT_MIN;
2023 if (out_idx == 0 && pics > 1 && h->delayed_pic[0]->f.key_frame) {
2024 h->next_outputed_poc = INT_MIN;
2026 h->next_outputed_poc = out->poc;
2031 av_log(h->avctx, AV_LOG_DEBUG, "no picture\n");
2034 if (setup_finished && !h->avctx->hwaccel)
2035 ff_thread_finish_setup(h->avctx);
2038 static av_always_inline void backup_mb_border(H264Context *h, uint8_t *src_y,
2039 uint8_t *src_cb, uint8_t *src_cr,
2040 int linesize, int uvlinesize,
2043 uint8_t *top_border;
2045 const int pixel_shift = h->pixel_shift;
2046 int chroma444 = CHROMA444(h);
2047 int chroma422 = CHROMA422(h);
2050 src_cb -= uvlinesize;
2051 src_cr -= uvlinesize;
2053 if (!simple && FRAME_MBAFF(h)) {
2056 top_border = h->top_borders[0][h->mb_x];
2057 AV_COPY128(top_border, src_y + 15 * linesize);
2059 AV_COPY128(top_border + 16, src_y + 15 * linesize + 16);
2060 if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
2063 AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
2064 AV_COPY128(top_border + 48, src_cb + 15 * uvlinesize + 16);
2065 AV_COPY128(top_border + 64, src_cr + 15 * uvlinesize);
2066 AV_COPY128(top_border + 80, src_cr + 15 * uvlinesize + 16);
2068 AV_COPY128(top_border + 16, src_cb + 15 * uvlinesize);
2069 AV_COPY128(top_border + 32, src_cr + 15 * uvlinesize);
2071 } else if (chroma422) {
2073 AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
2074 AV_COPY128(top_border + 48, src_cr + 15 * uvlinesize);
2076 AV_COPY64(top_border + 16, src_cb + 15 * uvlinesize);
2077 AV_COPY64(top_border + 24, src_cr + 15 * uvlinesize);
2081 AV_COPY128(top_border + 32, src_cb + 7 * uvlinesize);
2082 AV_COPY128(top_border + 48, src_cr + 7 * uvlinesize);
2084 AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize);
2085 AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize);
2090 } else if (MB_MBAFF(h)) {
2096 top_border = h->top_borders[top_idx][h->mb_x];
2097 /* There are two lines saved, the line above the top macroblock
2098 * of a pair, and the line above the bottom macroblock. */
2099 AV_COPY128(top_border, src_y + 16 * linesize);
2101 AV_COPY128(top_border + 16, src_y + 16 * linesize + 16);
2103 if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
2106 AV_COPY128(top_border + 32, src_cb + 16 * linesize);
2107 AV_COPY128(top_border + 48, src_cb + 16 * linesize + 16);
2108 AV_COPY128(top_border + 64, src_cr + 16 * linesize);
2109 AV_COPY128(top_border + 80, src_cr + 16 * linesize + 16);
2111 AV_COPY128(top_border + 16, src_cb + 16 * linesize);
2112 AV_COPY128(top_border + 32, src_cr + 16 * linesize);
2114 } else if (chroma422) {
2116 AV_COPY128(top_border + 32, src_cb + 16 * uvlinesize);
2117 AV_COPY128(top_border + 48, src_cr + 16 * uvlinesize);
2119 AV_COPY64(top_border + 16, src_cb + 16 * uvlinesize);
2120 AV_COPY64(top_border + 24, src_cr + 16 * uvlinesize);
2124 AV_COPY128(top_border + 32, src_cb + 8 * uvlinesize);
2125 AV_COPY128(top_border + 48, src_cr + 8 * uvlinesize);
2127 AV_COPY64(top_border + 16, src_cb + 8 * uvlinesize);
2128 AV_COPY64(top_border + 24, src_cr + 8 * uvlinesize);
2134 static av_always_inline void xchg_mb_border(H264Context *h, uint8_t *src_y,
2135 uint8_t *src_cb, uint8_t *src_cr,
2136 int linesize, int uvlinesize,
2137 int xchg, int chroma444,
2138 int simple, int pixel_shift)
2140 int deblock_topleft;
2143 uint8_t *top_border_m1;
2144 uint8_t *top_border;
2146 if (!simple && FRAME_MBAFF(h)) {
2151 top_idx = MB_MBAFF(h) ? 0 : 1;
2155 if (h->deblocking_filter == 2) {
2156 deblock_topleft = h->slice_table[h->mb_xy - 1 - h->mb_stride] == h->slice_num;
2157 deblock_top = h->top_type;
2159 deblock_topleft = (h->mb_x > 0);
2160 deblock_top = (h->mb_y > !!MB_FIELD(h));
2163 src_y -= linesize + 1 + pixel_shift;
2164 src_cb -= uvlinesize + 1 + pixel_shift;
2165 src_cr -= uvlinesize + 1 + pixel_shift;
2167 top_border_m1 = h->top_borders[top_idx][h->mb_x - 1];
2168 top_border = h->top_borders[top_idx][h->mb_x];
2170 #define XCHG(a, b, xchg) \
2171 if (pixel_shift) { \
2173 AV_SWAP64(b + 0, a + 0); \
2174 AV_SWAP64(b + 8, a + 8); \
2184 if (deblock_topleft) {
2185 XCHG(top_border_m1 + (8 << pixel_shift),
2186 src_y - (7 << pixel_shift), 1);
2188 XCHG(top_border + (0 << pixel_shift), src_y + (1 << pixel_shift), xchg);
2189 XCHG(top_border + (8 << pixel_shift), src_y + (9 << pixel_shift), 1);
2190 if (h->mb_x + 1 < h->mb_width) {
2191 XCHG(h->top_borders[top_idx][h->mb_x + 1],
2192 src_y + (17 << pixel_shift), 1);
2195 if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
2197 if (deblock_topleft) {
2198 XCHG(top_border_m1 + (24 << pixel_shift), src_cb - (7 << pixel_shift), 1);
2199 XCHG(top_border_m1 + (40 << pixel_shift), src_cr - (7 << pixel_shift), 1);
2201 XCHG(top_border + (16 << pixel_shift), src_cb + (1 << pixel_shift), xchg);
2202 XCHG(top_border + (24 << pixel_shift), src_cb + (9 << pixel_shift), 1);
2203 XCHG(top_border + (32 << pixel_shift), src_cr + (1 << pixel_shift), xchg);
2204 XCHG(top_border + (40 << pixel_shift), src_cr + (9 << pixel_shift), 1);
2205 if (h->mb_x + 1 < h->mb_width) {
2206 XCHG(h->top_borders[top_idx][h->mb_x + 1] + (16 << pixel_shift), src_cb + (17 << pixel_shift), 1);
2207 XCHG(h->top_borders[top_idx][h->mb_x + 1] + (32 << pixel_shift), src_cr + (17 << pixel_shift), 1);
2211 if (deblock_topleft) {
2212 XCHG(top_border_m1 + (16 << pixel_shift), src_cb - (7 << pixel_shift), 1);
2213 XCHG(top_border_m1 + (24 << pixel_shift), src_cr - (7 << pixel_shift), 1);
2215 XCHG(top_border + (16 << pixel_shift), src_cb + 1 + pixel_shift, 1);
2216 XCHG(top_border + (24 << pixel_shift), src_cr + 1 + pixel_shift, 1);
2222 static av_always_inline int dctcoef_get(int16_t *mb, int high_bit_depth,
2225 if (high_bit_depth) {
2226 return AV_RN32A(((int32_t *)mb) + index);
2228 return AV_RN16A(mb + index);
2231 static av_always_inline void dctcoef_set(int16_t *mb, int high_bit_depth,
2232 int index, int value)
2234 if (high_bit_depth) {
2235 AV_WN32A(((int32_t *)mb) + index, value);
2237 AV_WN16A(mb + index, value);
2240 static av_always_inline void hl_decode_mb_predict_luma(H264Context *h,
2241 int mb_type, int is_h264,
2243 int transform_bypass,
2247 uint8_t *dest_y, int p)
2249 void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
2250 void (*idct_dc_add)(uint8_t *dst, int16_t *block, int stride);
2252 int qscale = p == 0 ? h->qscale : h->chroma_qp[p - 1];
2253 block_offset += 16 * p;
2254 if (IS_INTRA4x4(mb_type)) {
2255 if (IS_8x8DCT(mb_type)) {
2256 if (transform_bypass) {
2258 idct_add = h->h264dsp.h264_add_pixels8_clear;
2260 idct_dc_add = h->h264dsp.h264_idct8_dc_add;
2261 idct_add = h->h264dsp.h264_idct8_add;
2263 for (i = 0; i < 16; i += 4) {
2264 uint8_t *const ptr = dest_y + block_offset[i];
2265 const int dir = h->intra4x4_pred_mode_cache[scan8[i]];
2266 if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {
2267 h->hpc.pred8x8l_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2269 const int nnz = h->non_zero_count_cache[scan8[i + p * 16]];
2270 h->hpc.pred8x8l[dir](ptr, (h->topleft_samples_available << i) & 0x8000,
2271 (h->topright_samples_available << i) & 0x4000, linesize);
2273 if (nnz == 1 && dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
2274 idct_dc_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2276 idct_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2281 if (transform_bypass) {
2283 idct_add = h->h264dsp.h264_add_pixels4_clear;
2285 idct_dc_add = h->h264dsp.h264_idct_dc_add;
2286 idct_add = h->h264dsp.h264_idct_add;
2288 for (i = 0; i < 16; i++) {
2289 uint8_t *const ptr = dest_y + block_offset[i];
2290 const int dir = h->intra4x4_pred_mode_cache[scan8[i]];
2292 if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {
2293 h->hpc.pred4x4_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2298 if (dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED) {
2299 const int topright_avail = (h->topright_samples_available << i) & 0x8000;
2300 assert(h->mb_y || linesize <= block_offset[i]);
2301 if (!topright_avail) {
2303 tr_high = ((uint16_t *)ptr)[3 - linesize / 2] * 0x0001000100010001ULL;
2304 topright = (uint8_t *)&tr_high;
2306 tr = ptr[3 - linesize] * 0x01010101u;
2307 topright = (uint8_t *)&tr;
2310 topright = ptr + (4 << pixel_shift) - linesize;
2314 h->hpc.pred4x4[dir](ptr, topright, linesize);
2315 nnz = h->non_zero_count_cache[scan8[i + p * 16]];
2318 if (nnz == 1 && dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
2319 idct_dc_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2321 idct_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2322 } else if (CONFIG_SVQ3_DECODER)
2323 ff_svq3_add_idct_c(ptr, h->mb + i * 16 + p * 256, linesize, qscale, 0);
2329 h->hpc.pred16x16[h->intra16x16_pred_mode](dest_y, linesize);
2331 if (h->non_zero_count_cache[scan8[LUMA_DC_BLOCK_INDEX + p]]) {
2332 if (!transform_bypass)
2333 h->h264dsp.h264_luma_dc_dequant_idct(h->mb + (p * 256 << pixel_shift),
2335 h->dequant4_coeff[p][qscale][0]);
2337 static const uint8_t dc_mapping[16] = {
2338 0 * 16, 1 * 16, 4 * 16, 5 * 16,
2339 2 * 16, 3 * 16, 6 * 16, 7 * 16,
2340 8 * 16, 9 * 16, 12 * 16, 13 * 16,
2341 10 * 16, 11 * 16, 14 * 16, 15 * 16 };
2342 for (i = 0; i < 16; i++)
2343 dctcoef_set(h->mb + (p * 256 << pixel_shift),
2344 pixel_shift, dc_mapping[i],
2345 dctcoef_get(h->mb_luma_dc[p],
2349 } else if (CONFIG_SVQ3_DECODER)
2350 ff_svq3_luma_dc_dequant_idct_c(h->mb + p * 256,
2351 h->mb_luma_dc[p], qscale);
2355 static av_always_inline void hl_decode_mb_idct_luma(H264Context *h, int mb_type,
2356 int is_h264, int simple,
2357 int transform_bypass,
2361 uint8_t *dest_y, int p)
2363 void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
2365 block_offset += 16 * p;
2366 if (!IS_INTRA4x4(mb_type)) {
2368 if (IS_INTRA16x16(mb_type)) {
2369 if (transform_bypass) {
2370 if (h->sps.profile_idc == 244 &&
2371 (h->intra16x16_pred_mode == VERT_PRED8x8 ||
2372 h->intra16x16_pred_mode == HOR_PRED8x8)) {
2373 h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset,
2374 h->mb + (p * 256 << pixel_shift),
2377 for (i = 0; i < 16; i++)
2378 if (h->non_zero_count_cache[scan8[i + p * 16]] ||
2379 dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
2380 h->h264dsp.h264_add_pixels4_clear(dest_y + block_offset[i],
2381 h->mb + (i * 16 + p * 256 << pixel_shift),
2385 h->h264dsp.h264_idct_add16intra(dest_y, block_offset,
2386 h->mb + (p * 256 << pixel_shift),
2388 h->non_zero_count_cache + p * 5 * 8);
2390 } else if (h->cbp & 15) {
2391 if (transform_bypass) {
2392 const int di = IS_8x8DCT(mb_type) ? 4 : 1;
2393 idct_add = IS_8x8DCT(mb_type) ? h->h264dsp.h264_add_pixels8_clear
2394 : h->h264dsp.h264_add_pixels4_clear;
2395 for (i = 0; i < 16; i += di)
2396 if (h->non_zero_count_cache[scan8[i + p * 16]])
2397 idct_add(dest_y + block_offset[i],
2398 h->mb + (i * 16 + p * 256 << pixel_shift),
2401 if (IS_8x8DCT(mb_type))
2402 h->h264dsp.h264_idct8_add4(dest_y, block_offset,
2403 h->mb + (p * 256 << pixel_shift),
2405 h->non_zero_count_cache + p * 5 * 8);
2407 h->h264dsp.h264_idct_add16(dest_y, block_offset,
2408 h->mb + (p * 256 << pixel_shift),
2410 h->non_zero_count_cache + p * 5 * 8);
2413 } else if (CONFIG_SVQ3_DECODER) {
2414 for (i = 0; i < 16; i++)
2415 if (h->non_zero_count_cache[scan8[i + p * 16]] || h->mb[i * 16 + p * 256]) {
2416 // FIXME benchmark weird rule, & below
2417 uint8_t *const ptr = dest_y + block_offset[i];
2418 ff_svq3_add_idct_c(ptr, h->mb + i * 16 + p * 256, linesize,
2419 h->qscale, IS_INTRA(mb_type) ? 1 : 0);
2427 #include "h264_mb_template.c"
2431 #include "h264_mb_template.c"
2435 #include "h264_mb_template.c"
2437 void ff_h264_hl_decode_mb(H264Context *h)
2439 const int mb_xy = h->mb_xy;
2440 const int mb_type = h->cur_pic.mb_type[mb_xy];
2441 int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || h->qscale == 0;
2444 if (is_complex || h->pixel_shift)
2445 hl_decode_mb_444_complex(h);
2447 hl_decode_mb_444_simple_8(h);
2448 } else if (is_complex) {
2449 hl_decode_mb_complex(h);
2450 } else if (h->pixel_shift) {
2451 hl_decode_mb_simple_16(h);
2453 hl_decode_mb_simple_8(h);
2456 static int pred_weight_table(H264Context *h)
2459 int luma_def, chroma_def;
2462 h->use_weight_chroma = 0;
2463 h->luma_log2_weight_denom = get_ue_golomb(&h->gb);
2464 if (h->sps.chroma_format_idc)
2465 h->chroma_log2_weight_denom = get_ue_golomb(&h->gb);
2466 luma_def = 1 << h->luma_log2_weight_denom;
2467 chroma_def = 1 << h->chroma_log2_weight_denom;
2469 for (list = 0; list < 2; list++) {
2470 h->luma_weight_flag[list] = 0;
2471 h->chroma_weight_flag[list] = 0;
2472 for (i = 0; i < h->ref_count[list]; i++) {
2473 int luma_weight_flag, chroma_weight_flag;
2475 luma_weight_flag = get_bits1(&h->gb);
2476 if (luma_weight_flag) {
2477 h->luma_weight[i][list][0] = get_se_golomb(&h->gb);
2478 h->luma_weight[i][list][1] = get_se_golomb(&h->gb);
2479 if (h->luma_weight[i][list][0] != luma_def ||
2480 h->luma_weight[i][list][1] != 0) {
2482 h->luma_weight_flag[list] = 1;
2485 h->luma_weight[i][list][0] = luma_def;
2486 h->luma_weight[i][list][1] = 0;
2489 if (h->sps.chroma_format_idc) {
2490 chroma_weight_flag = get_bits1(&h->gb);
2491 if (chroma_weight_flag) {
2493 for (j = 0; j < 2; j++) {
2494 h->chroma_weight[i][list][j][0] = get_se_golomb(&h->gb);
2495 h->chroma_weight[i][list][j][1] = get_se_golomb(&h->gb);
2496 if (h->chroma_weight[i][list][j][0] != chroma_def ||
2497 h->chroma_weight[i][list][j][1] != 0) {
2498 h->use_weight_chroma = 1;
2499 h->chroma_weight_flag[list] = 1;
2504 for (j = 0; j < 2; j++) {
2505 h->chroma_weight[i][list][j][0] = chroma_def;
2506 h->chroma_weight[i][list][j][1] = 0;
2511 if (h->slice_type_nos != AV_PICTURE_TYPE_B)
2514 h->use_weight = h->use_weight || h->use_weight_chroma;
2519 * Initialize implicit_weight table.
2520 * @param field 0/1 initialize the weight for interlaced MBAFF
2521 * -1 initializes the rest
2523 static void implicit_weight_table(H264Context *h, int field)
2525 int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
2527 for (i = 0; i < 2; i++) {
2528 h->luma_weight_flag[i] = 0;
2529 h->chroma_weight_flag[i] = 0;
2533 if (h->picture_structure == PICT_FRAME) {
2534 cur_poc = h->cur_pic_ptr->poc;
2536 cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1];
2538 if (h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF(h) &&
2539 h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2 * cur_poc) {
2541 h->use_weight_chroma = 0;
2545 ref_count0 = h->ref_count[0];
2546 ref_count1 = h->ref_count[1];
2548 cur_poc = h->cur_pic_ptr->field_poc[field];
2550 ref_count0 = 16 + 2 * h->ref_count[0];
2551 ref_count1 = 16 + 2 * h->ref_count[1];
2555 h->use_weight_chroma = 2;
2556 h->luma_log2_weight_denom = 5;
2557 h->chroma_log2_weight_denom = 5;
2559 for (ref0 = ref_start; ref0 < ref_count0; ref0++) {
2560 int poc0 = h->ref_list[0][ref0].poc;
2561 for (ref1 = ref_start; ref1 < ref_count1; ref1++) {
2563 if (!h->ref_list[0][ref0].long_ref && !h->ref_list[1][ref1].long_ref) {
2564 int poc1 = h->ref_list[1][ref1].poc;
2565 int td = av_clip(poc1 - poc0, -128, 127);
2567 int tb = av_clip(cur_poc - poc0, -128, 127);
2568 int tx = (16384 + (FFABS(td) >> 1)) / td;
2569 int dist_scale_factor = (tb * tx + 32) >> 8;
2570 if (dist_scale_factor >= -64 && dist_scale_factor <= 128)
2571 w = 64 - dist_scale_factor;
2575 h->implicit_weight[ref0][ref1][0] =
2576 h->implicit_weight[ref0][ref1][1] = w;
2578 h->implicit_weight[ref0][ref1][field] = w;
2585 * instantaneous decoder refresh.
2587 static void idr(H264Context *h)
2589 ff_h264_remove_all_refs(h);
2590 h->prev_frame_num = 0;
2591 h->prev_frame_num_offset = 0;
2593 h->prev_poc_lsb = 0;
2596 /* forget old pics after a seek */
2597 static void flush_change(H264Context *h)
2600 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
2601 h->last_pocs[i] = INT_MIN;
2602 h->outputed_poc = h->next_outputed_poc = INT_MIN;
2603 h->prev_interlaced_frame = 1;
2606 h->cur_pic_ptr->reference = 0;
2608 memset(h->ref_list[0], 0, sizeof(h->ref_list[0]));
2609 memset(h->ref_list[1], 0, sizeof(h->ref_list[1]));
2610 memset(h->default_ref_list[0], 0, sizeof(h->default_ref_list[0]));
2611 memset(h->default_ref_list[1], 0, sizeof(h->default_ref_list[1]));
2612 ff_h264_reset_sei(h);
2615 /* forget old pics after a seek */
2616 static void flush_dpb(AVCodecContext *avctx)
2618 H264Context *h = avctx->priv_data;
2621 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++) {
2622 if (h->delayed_pic[i])
2623 h->delayed_pic[i]->reference = 0;
2624 h->delayed_pic[i] = NULL;
2630 for (i = 0; i < MAX_PICTURE_COUNT; i++)
2631 unref_picture(h, &h->DPB[i]);
2632 h->cur_pic_ptr = NULL;
2633 unref_picture(h, &h->cur_pic);
2635 h->mb_x = h->mb_y = 0;
2637 h->parse_context.state = -1;
2638 h->parse_context.frame_start_found = 0;
2639 h->parse_context.overread = 0;
2640 h->parse_context.overread_index = 0;
2641 h->parse_context.index = 0;
2642 h->parse_context.last_index = 0;
2645 int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc)
2647 const int max_frame_num = 1 << h->sps.log2_max_frame_num;
2650 h->frame_num_offset = h->prev_frame_num_offset;
2651 if (h->frame_num < h->prev_frame_num)
2652 h->frame_num_offset += max_frame_num;
2654 if (h->sps.poc_type == 0) {
2655 const int max_poc_lsb = 1 << h->sps.log2_max_poc_lsb;
2657 if (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb / 2)
2658 h->poc_msb = h->prev_poc_msb + max_poc_lsb;
2659 else if (h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb / 2)
2660 h->poc_msb = h->prev_poc_msb - max_poc_lsb;
2662 h->poc_msb = h->prev_poc_msb;
2664 field_poc[1] = h->poc_msb + h->poc_lsb;
2665 if (h->picture_structure == PICT_FRAME)
2666 field_poc[1] += h->delta_poc_bottom;
2667 } else if (h->sps.poc_type == 1) {
2668 int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
2671 if (h->sps.poc_cycle_length != 0)
2672 abs_frame_num = h->frame_num_offset + h->frame_num;
2676 if (h->nal_ref_idc == 0 && abs_frame_num > 0)
2679 expected_delta_per_poc_cycle = 0;
2680 for (i = 0; i < h->sps.poc_cycle_length; i++)
2681 // FIXME integrate during sps parse
2682 expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[i];
2684 if (abs_frame_num > 0) {
2685 int poc_cycle_cnt = (abs_frame_num - 1) / h->sps.poc_cycle_length;
2686 int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
2688 expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
2689 for (i = 0; i <= frame_num_in_poc_cycle; i++)
2690 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[i];
2694 if (h->nal_ref_idc == 0)
2695 expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
2697 field_poc[0] = expectedpoc + h->delta_poc[0];
2698 field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
2700 if (h->picture_structure == PICT_FRAME)
2701 field_poc[1] += h->delta_poc[1];
2703 int poc = 2 * (h->frame_num_offset + h->frame_num);
2705 if (!h->nal_ref_idc)
2712 if (h->picture_structure != PICT_BOTTOM_FIELD)
2713 pic_field_poc[0] = field_poc[0];
2714 if (h->picture_structure != PICT_TOP_FIELD)
2715 pic_field_poc[1] = field_poc[1];
2717 *pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
2723 * initialize scan tables
2725 static void init_scan_tables(H264Context *h)
2728 for (i = 0; i < 16; i++) {
2729 #define T(x) (x >> 2) | ((x << 2) & 0xF)
2730 h->zigzag_scan[i] = T(zigzag_scan[i]);
2731 h->field_scan[i] = T(field_scan[i]);
2734 for (i = 0; i < 64; i++) {
2735 #define T(x) (x >> 3) | ((x & 7) << 3)
2736 h->zigzag_scan8x8[i] = T(ff_zigzag_direct[i]);
2737 h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
2738 h->field_scan8x8[i] = T(field_scan8x8[i]);
2739 h->field_scan8x8_cavlc[i] = T(field_scan8x8_cavlc[i]);
2742 if (h->sps.transform_bypass) { // FIXME same ugly
2743 h->zigzag_scan_q0 = zigzag_scan;
2744 h->zigzag_scan8x8_q0 = ff_zigzag_direct;
2745 h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
2746 h->field_scan_q0 = field_scan;
2747 h->field_scan8x8_q0 = field_scan8x8;
2748 h->field_scan8x8_cavlc_q0 = field_scan8x8_cavlc;
2750 h->zigzag_scan_q0 = h->zigzag_scan;
2751 h->zigzag_scan8x8_q0 = h->zigzag_scan8x8;
2752 h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
2753 h->field_scan_q0 = h->field_scan;
2754 h->field_scan8x8_q0 = h->field_scan8x8;
2755 h->field_scan8x8_cavlc_q0 = h->field_scan8x8_cavlc;
2759 static int field_end(H264Context *h, int in_setup)
2761 AVCodecContext *const avctx = h->avctx;
2765 if (!in_setup && !h->droppable)
2766 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
2767 h->picture_structure == PICT_BOTTOM_FIELD);
2769 if (CONFIG_H264_VDPAU_DECODER &&
2770 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
2771 ff_vdpau_h264_set_reference_frames(h);
2773 if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
2774 if (!h->droppable) {
2775 err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
2776 h->prev_poc_msb = h->poc_msb;
2777 h->prev_poc_lsb = h->poc_lsb;
2779 h->prev_frame_num_offset = h->frame_num_offset;
2780 h->prev_frame_num = h->frame_num;
2781 h->outputed_poc = h->next_outputed_poc;
2784 if (avctx->hwaccel) {
2785 if (avctx->hwaccel->end_frame(avctx) < 0)
2786 av_log(avctx, AV_LOG_ERROR,
2787 "hardware accelerator failed to decode picture\n");
2790 if (CONFIG_H264_VDPAU_DECODER &&
2791 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
2792 ff_vdpau_h264_picture_complete(h);
2795 * FIXME: Error handling code does not seem to support interlaced
2796 * when slices span multiple rows
2797 * The ff_er_add_slice calls don't work right for bottom
2798 * fields; they cause massive erroneous error concealing
2799 * Error marking covers both fields (top and bottom).
2800 * This causes a mismatched s->error_count
2801 * and a bad error table. Further, the error count goes to
2802 * INT_MAX when called for bottom field, because mb_y is
2803 * past end by one (callers fault) and resync_mb_y != 0
2804 * causes problems for the first MB line, too.
2806 if (CONFIG_ERROR_RESILIENCE && !FIELD_PICTURE(h)) {
2807 h->er.cur_pic = h->cur_pic_ptr;
2808 h->er.last_pic = h->ref_count[0] ? &h->ref_list[0][0] : NULL;
2809 h->er.next_pic = h->ref_count[1] ? &h->ref_list[1][0] : NULL;
2810 ff_er_frame_end(&h->er);
2814 h->current_slice = 0;
2820 * Replicate H264 "master" context to thread contexts.
2822 static int clone_slice(H264Context *dst, H264Context *src)
2824 memcpy(dst->block_offset, src->block_offset, sizeof(dst->block_offset));
2825 dst->cur_pic_ptr = src->cur_pic_ptr;
2826 dst->cur_pic = src->cur_pic;
2827 dst->linesize = src->linesize;
2828 dst->uvlinesize = src->uvlinesize;
2829 dst->first_field = src->first_field;
2831 dst->prev_poc_msb = src->prev_poc_msb;
2832 dst->prev_poc_lsb = src->prev_poc_lsb;
2833 dst->prev_frame_num_offset = src->prev_frame_num_offset;
2834 dst->prev_frame_num = src->prev_frame_num;
2835 dst->short_ref_count = src->short_ref_count;
2837 memcpy(dst->short_ref, src->short_ref, sizeof(dst->short_ref));
2838 memcpy(dst->long_ref, src->long_ref, sizeof(dst->long_ref));
2839 memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
2841 memcpy(dst->dequant4_coeff, src->dequant4_coeff, sizeof(src->dequant4_coeff));
2842 memcpy(dst->dequant8_coeff, src->dequant8_coeff, sizeof(src->dequant8_coeff));
2848 * Compute profile from profile_idc and constraint_set?_flags.
2852 * @return profile as defined by FF_PROFILE_H264_*
2854 int ff_h264_get_profile(SPS *sps)
2856 int profile = sps->profile_idc;
2858 switch (sps->profile_idc) {
2859 case FF_PROFILE_H264_BASELINE:
2860 // constraint_set1_flag set to 1
2861 profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
2863 case FF_PROFILE_H264_HIGH_10:
2864 case FF_PROFILE_H264_HIGH_422:
2865 case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
2866 // constraint_set3_flag set to 1
2867 profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
2874 static int h264_set_parameter_from_sps(H264Context *h)
2876 if (h->flags & CODEC_FLAG_LOW_DELAY ||
2877 (h->sps.bitstream_restriction_flag &&
2878 !h->sps.num_reorder_frames)) {
2879 if (h->avctx->has_b_frames > 1 || h->delayed_pic[0])
2880 av_log(h->avctx, AV_LOG_WARNING, "Delayed frames seen. "
2881 "Reenabling low delay requires a codec flush.\n");
2886 if (h->avctx->has_b_frames < 2)
2887 h->avctx->has_b_frames = !h->low_delay;
2889 if (h->sps.bit_depth_luma != h->sps.bit_depth_chroma) {
2890 avpriv_request_sample(h->avctx,
2891 "Different chroma and luma bit depth");
2892 return AVERROR_PATCHWELCOME;
2895 if (h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma ||
2896 h->cur_chroma_format_idc != h->sps.chroma_format_idc) {
2897 if (h->avctx->codec &&
2898 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU &&
2899 (h->sps.bit_depth_luma != 8 || h->sps.chroma_format_idc > 1)) {
2900 av_log(h->avctx, AV_LOG_ERROR,
2901 "VDPAU decoding does not support video colorspace.\n");
2902 return AVERROR_INVALIDDATA;
2904 if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 10) {
2905 h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
2906 h->cur_chroma_format_idc = h->sps.chroma_format_idc;
2907 h->pixel_shift = h->sps.bit_depth_luma > 8;
2909 ff_h264dsp_init(&h->h264dsp, h->sps.bit_depth_luma,
2910 h->sps.chroma_format_idc);
2911 ff_h264chroma_init(&h->h264chroma, h->sps.bit_depth_chroma);
2912 ff_h264qpel_init(&h->h264qpel, h->sps.bit_depth_luma);
2913 ff_h264_pred_init(&h->hpc, h->avctx->codec_id, h->sps.bit_depth_luma,
2914 h->sps.chroma_format_idc);
2915 if (CONFIG_ERROR_RESILIENCE)
2916 ff_dsputil_init(&h->dsp, h->avctx);
2917 ff_videodsp_init(&h->vdsp, h->sps.bit_depth_luma);
2919 av_log(h->avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n",
2920 h->sps.bit_depth_luma);
2921 return AVERROR_INVALIDDATA;
2927 static enum AVPixelFormat get_pixel_format(H264Context *h)
2929 switch (h->sps.bit_depth_luma) {
2932 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
2933 return AV_PIX_FMT_GBRP9;
2935 return AV_PIX_FMT_YUV444P9;
2936 } else if (CHROMA422(h))
2937 return AV_PIX_FMT_YUV422P9;
2939 return AV_PIX_FMT_YUV420P9;
2943 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
2944 return AV_PIX_FMT_GBRP10;
2946 return AV_PIX_FMT_YUV444P10;
2947 } else if (CHROMA422(h))
2948 return AV_PIX_FMT_YUV422P10;
2950 return AV_PIX_FMT_YUV420P10;
2954 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
2955 return AV_PIX_FMT_GBRP;
2957 return h->avctx->color_range == AVCOL_RANGE_JPEG ? AV_PIX_FMT_YUVJ444P
2958 : AV_PIX_FMT_YUV444P;
2959 } else if (CHROMA422(h)) {
2960 return h->avctx->color_range == AVCOL_RANGE_JPEG ? AV_PIX_FMT_YUVJ422P
2961 : AV_PIX_FMT_YUV422P;
2963 return h->avctx->get_format(h->avctx, h->avctx->codec->pix_fmts ?
2964 h->avctx->codec->pix_fmts :
2965 h->avctx->color_range == AVCOL_RANGE_JPEG ?
2966 h264_hwaccel_pixfmt_list_jpeg_420 :
2967 h264_hwaccel_pixfmt_list_420);
2971 av_log(h->avctx, AV_LOG_ERROR,
2972 "Unsupported bit depth: %d\n", h->sps.bit_depth_luma);
2973 return AVERROR_INVALIDDATA;
2977 /* export coded and cropped frame dimensions to AVCodecContext */
2978 static int init_dimensions(H264Context *h)
2980 int width = h->width - (h->sps.crop_right + h->sps.crop_left);
2981 int height = h->height - (h->sps.crop_top + h->sps.crop_bottom);
2983 /* handle container cropping */
2985 FFALIGN(h->avctx->width, 16) == h->width &&
2986 FFALIGN(h->avctx->height, 16) == h->height) {
2987 width = h->avctx->width;
2988 height = h->avctx->height;
2991 if (width <= 0 || height <= 0) {
2992 av_log(h->avctx, AV_LOG_ERROR, "Invalid cropped dimensions: %dx%d.\n",
2994 if (h->avctx->err_recognition & AV_EF_EXPLODE)
2995 return AVERROR_INVALIDDATA;
2997 av_log(h->avctx, AV_LOG_WARNING, "Ignoring cropping information.\n");
2998 h->sps.crop_bottom = h->sps.crop_top = h->sps.crop_right = h->sps.crop_left = 0;
3005 h->avctx->coded_width = h->width;
3006 h->avctx->coded_height = h->height;
3007 h->avctx->width = width;
3008 h->avctx->height = height;
3013 static int h264_slice_header_init(H264Context *h, int reinit)
3015 int nb_slices = (HAVE_THREADS &&
3016 h->avctx->active_thread_type & FF_THREAD_SLICE) ?
3017 h->avctx->thread_count : 1;
3020 h->avctx->sample_aspect_ratio = h->sps.sar;
3021 av_assert0(h->avctx->sample_aspect_ratio.den);
3022 av_pix_fmt_get_chroma_sub_sample(h->avctx->pix_fmt,
3023 &h->chroma_x_shift, &h->chroma_y_shift);
3025 if (h->sps.timing_info_present_flag) {
3026 int64_t den = h->sps.time_scale;
3027 if (h->x264_build < 44U)
3029 av_reduce(&h->avctx->time_base.num, &h->avctx->time_base.den,
3030 h->sps.num_units_in_tick, den, 1 << 30);
3033 h->avctx->hwaccel = ff_find_hwaccel(h->avctx->codec->id, h->avctx->pix_fmt);
3038 h->prev_interlaced_frame = 1;
3040 init_scan_tables(h);
3041 if (ff_h264_alloc_tables(h) < 0) {
3042 av_log(h->avctx, AV_LOG_ERROR,
3043 "Could not allocate memory for h264\n");
3044 return AVERROR(ENOMEM);
3047 if (nb_slices > MAX_THREADS || (nb_slices > h->mb_height && h->mb_height)) {
3050 max_slices = FFMIN(MAX_THREADS, h->mb_height);
3052 max_slices = MAX_THREADS;
3053 av_log(h->avctx, AV_LOG_WARNING, "too many threads/slices (%d),"
3054 " reducing to %d\n", nb_slices, max_slices);
3055 nb_slices = max_slices;
3057 h->slice_context_count = nb_slices;
3059 if (!HAVE_THREADS || !(h->avctx->active_thread_type & FF_THREAD_SLICE)) {
3060 if (context_init(h) < 0) {
3061 av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
3065 for (i = 1; i < h->slice_context_count; i++) {
3067 c = h->thread_context[i] = av_mallocz(sizeof(H264Context));
3068 c->avctx = h->avctx;
3071 c->h264dsp = h->h264dsp;
3072 c->h264qpel = h->h264qpel;
3073 c->h264chroma = h->h264chroma;
3076 c->pixel_shift = h->pixel_shift;
3077 c->width = h->width;
3078 c->height = h->height;
3079 c->linesize = h->linesize;
3080 c->uvlinesize = h->uvlinesize;
3081 c->chroma_x_shift = h->chroma_x_shift;
3082 c->chroma_y_shift = h->chroma_y_shift;
3083 c->qscale = h->qscale;
3084 c->droppable = h->droppable;
3085 c->data_partitioning = h->data_partitioning;
3086 c->low_delay = h->low_delay;
3087 c->mb_width = h->mb_width;
3088 c->mb_height = h->mb_height;
3089 c->mb_stride = h->mb_stride;
3090 c->mb_num = h->mb_num;
3091 c->flags = h->flags;
3092 c->workaround_bugs = h->workaround_bugs;
3093 c->pict_type = h->pict_type;
3095 init_scan_tables(c);
3096 clone_tables(c, h, i);
3097 c->context_initialized = 1;
3100 for (i = 0; i < h->slice_context_count; i++)
3101 if (context_init(h->thread_context[i]) < 0) {
3102 av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
3107 h->context_initialized = 1;
3113 * Decode a slice header.
3114 * This will also call ff_MPV_common_init() and frame_start() as needed.
3116 * @param h h264context
3117 * @param h0 h264 master context (differs from 'h' when doing sliced based
3118 * parallel decoding)
3120 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
3122 static int decode_slice_header(H264Context *h, H264Context *h0)
3124 unsigned int first_mb_in_slice;
3125 unsigned int pps_id;
3126 int num_ref_idx_active_override_flag, max_refs, ret;
3127 unsigned int slice_type, tmp, i, j;
3128 int default_ref_list_done = 0;
3129 int last_pic_structure, last_pic_droppable;
3130 int needs_reinit = 0;
3132 h->me.qpel_put = h->h264qpel.put_h264_qpel_pixels_tab;
3133 h->me.qpel_avg = h->h264qpel.avg_h264_qpel_pixels_tab;
3135 first_mb_in_slice = get_ue_golomb(&h->gb);
3137 if (first_mb_in_slice == 0) { // FIXME better field boundary detection
3138 if (h0->current_slice && FIELD_PICTURE(h)) {
3142 h0->current_slice = 0;
3143 if (!h0->first_field) {
3144 if (h->cur_pic_ptr && !h->droppable) {
3145 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
3146 h->picture_structure == PICT_BOTTOM_FIELD);
3148 h->cur_pic_ptr = NULL;
3152 slice_type = get_ue_golomb_31(&h->gb);
3153 if (slice_type > 9) {
3154 av_log(h->avctx, AV_LOG_ERROR,
3155 "slice type too large (%d) at %d %d\n",
3156 h->slice_type, h->mb_x, h->mb_y);
3159 if (slice_type > 4) {
3161 h->slice_type_fixed = 1;
3163 h->slice_type_fixed = 0;
3165 slice_type = golomb_to_pict_type[slice_type];
3166 if (slice_type == AV_PICTURE_TYPE_I ||
3167 (h0->current_slice != 0 && slice_type == h0->last_slice_type)) {
3168 default_ref_list_done = 1;
3170 h->slice_type = slice_type;
3171 h->slice_type_nos = slice_type & 3;
3173 // to make a few old functions happy, it's wrong though
3174 h->pict_type = h->slice_type;
3176 pps_id = get_ue_golomb(&h->gb);
3177 if (pps_id >= MAX_PPS_COUNT) {
3178 av_log(h->avctx, AV_LOG_ERROR, "pps_id out of range\n");
3181 if (!h0->pps_buffers[pps_id]) {
3182 av_log(h->avctx, AV_LOG_ERROR,
3183 "non-existing PPS %u referenced\n",
3187 h->pps = *h0->pps_buffers[pps_id];
3189 if (!h0->sps_buffers[h->pps.sps_id]) {
3190 av_log(h->avctx, AV_LOG_ERROR,
3191 "non-existing SPS %u referenced\n",
3196 if (h->pps.sps_id != h->current_sps_id ||
3197 h0->sps_buffers[h->pps.sps_id]->new) {
3198 h0->sps_buffers[h->pps.sps_id]->new = 0;
3200 h->current_sps_id = h->pps.sps_id;
3201 h->sps = *h0->sps_buffers[h->pps.sps_id];
3203 if (h->bit_depth_luma != h->sps.bit_depth_luma ||
3204 h->chroma_format_idc != h->sps.chroma_format_idc) {
3205 h->bit_depth_luma = h->sps.bit_depth_luma;
3206 h->chroma_format_idc = h->sps.chroma_format_idc;
3209 if ((ret = h264_set_parameter_from_sps(h)) < 0)
3213 h->avctx->profile = ff_h264_get_profile(&h->sps);
3214 h->avctx->level = h->sps.level_idc;
3215 h->avctx->refs = h->sps.ref_frame_count;
3217 if (h->mb_width != h->sps.mb_width ||
3218 h->mb_height != h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag))
3221 h->mb_width = h->sps.mb_width;
3222 h->mb_height = h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
3223 h->mb_num = h->mb_width * h->mb_height;
3224 h->mb_stride = h->mb_width + 1;
3226 h->b_stride = h->mb_width * 4;
3228 h->chroma_y_shift = h->sps.chroma_format_idc <= 1; // 400 uses yuv420p
3230 h->width = 16 * h->mb_width;
3231 h->height = 16 * h->mb_height;
3233 ret = init_dimensions(h);
3237 if (h->sps.video_signal_type_present_flag) {
3238 h->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG
3240 if (h->sps.colour_description_present_flag) {
3241 if (h->avctx->colorspace != h->sps.colorspace)
3243 h->avctx->color_primaries = h->sps.color_primaries;
3244 h->avctx->color_trc = h->sps.color_trc;
3245 h->avctx->colorspace = h->sps.colorspace;
3249 if (h->context_initialized &&
3250 (h->width != h->avctx->coded_width ||
3251 h->height != h->avctx->coded_height ||
3255 av_log(h->avctx, AV_LOG_ERROR, "changing width/height on "
3256 "slice %d\n", h0->current_slice + 1);
3257 return AVERROR_INVALIDDATA;
3262 if ((ret = get_pixel_format(h)) < 0)
3264 h->avctx->pix_fmt = ret;
3266 av_log(h->avctx, AV_LOG_INFO, "Reinit context to %dx%d, "
3267 "pix_fmt: %d\n", h->width, h->height, h->avctx->pix_fmt);
3269 if ((ret = h264_slice_header_init(h, 1)) < 0) {
3270 av_log(h->avctx, AV_LOG_ERROR,
3271 "h264_slice_header_init() failed\n");
3275 if (!h->context_initialized) {
3277 av_log(h->avctx, AV_LOG_ERROR,
3278 "Cannot (re-)initialize context during parallel decoding.\n");
3282 if ((ret = get_pixel_format(h)) < 0)
3284 h->avctx->pix_fmt = ret;
3286 if ((ret = h264_slice_header_init(h, 0)) < 0) {
3287 av_log(h->avctx, AV_LOG_ERROR,
3288 "h264_slice_header_init() failed\n");
3293 if (h == h0 && h->dequant_coeff_pps != pps_id) {
3294 h->dequant_coeff_pps = pps_id;
3295 init_dequant_tables(h);
3298 h->frame_num = get_bits(&h->gb, h->sps.log2_max_frame_num);
3301 h->mb_aff_frame = 0;
3302 last_pic_structure = h0->picture_structure;
3303 last_pic_droppable = h0->droppable;
3304 h->droppable = h->nal_ref_idc == 0;
3305 if (h->sps.frame_mbs_only_flag) {
3306 h->picture_structure = PICT_FRAME;
3308 if (get_bits1(&h->gb)) { // field_pic_flag
3309 h->picture_structure = PICT_TOP_FIELD + get_bits1(&h->gb); // bottom_field_flag
3311 h->picture_structure = PICT_FRAME;
3312 h->mb_aff_frame = h->sps.mb_aff;
3315 h->mb_field_decoding_flag = h->picture_structure != PICT_FRAME;
3317 if (h0->current_slice != 0) {
3318 if (last_pic_structure != h->picture_structure ||
3319 last_pic_droppable != h->droppable) {
3320 av_log(h->avctx, AV_LOG_ERROR,
3321 "Changing field mode (%d -> %d) between slices is not allowed\n",
3322 last_pic_structure, h->picture_structure);
3323 h->picture_structure = last_pic_structure;
3324 h->droppable = last_pic_droppable;
3325 return AVERROR_INVALIDDATA;
3326 } else if (!h0->cur_pic_ptr) {
3327 av_log(h->avctx, AV_LOG_ERROR,
3328 "unset cur_pic_ptr on %d. slice\n",
3329 h0->current_slice + 1);
3330 return AVERROR_INVALIDDATA;
3333 /* Shorten frame num gaps so we don't have to allocate reference
3334 * frames just to throw them away */
3335 if (h->frame_num != h->prev_frame_num) {
3336 int unwrap_prev_frame_num = h->prev_frame_num;
3337 int max_frame_num = 1 << h->sps.log2_max_frame_num;
3339 if (unwrap_prev_frame_num > h->frame_num)
3340 unwrap_prev_frame_num -= max_frame_num;
3342 if ((h->frame_num - unwrap_prev_frame_num) > h->sps.ref_frame_count) {
3343 unwrap_prev_frame_num = (h->frame_num - h->sps.ref_frame_count) - 1;
3344 if (unwrap_prev_frame_num < 0)
3345 unwrap_prev_frame_num += max_frame_num;
3347 h->prev_frame_num = unwrap_prev_frame_num;
3351 /* See if we have a decoded first field looking for a pair...
3352 * Here, we're using that to see if we should mark previously
3353 * decode frames as "finished".
3354 * We have to do that before the "dummy" in-between frame allocation,
3355 * since that can modify s->current_picture_ptr. */
3356 if (h0->first_field) {
3357 assert(h0->cur_pic_ptr);
3358 assert(h0->cur_pic_ptr->f.data[0]);
3359 assert(h0->cur_pic_ptr->reference != DELAYED_PIC_REF);
3361 /* figure out if we have a complementary field pair */
3362 if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
3363 /* Previous field is unmatched. Don't display it, but let it
3364 * remain for reference if marked as such. */
3365 if (!last_pic_droppable && last_pic_structure != PICT_FRAME) {
3366 ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
3367 last_pic_structure == PICT_TOP_FIELD);
3370 if (h0->cur_pic_ptr->frame_num != h->frame_num) {
3371 /* This and previous field were reference, but had
3372 * different frame_nums. Consider this field first in
3373 * pair. Throw away previous field except for reference
3375 if (!last_pic_droppable && last_pic_structure != PICT_FRAME) {
3376 ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
3377 last_pic_structure == PICT_TOP_FIELD);
3380 /* Second field in complementary pair */
3381 if (!((last_pic_structure == PICT_TOP_FIELD &&
3382 h->picture_structure == PICT_BOTTOM_FIELD) ||
3383 (last_pic_structure == PICT_BOTTOM_FIELD &&
3384 h->picture_structure == PICT_TOP_FIELD))) {
3385 av_log(h->avctx, AV_LOG_ERROR,
3386 "Invalid field mode combination %d/%d\n",
3387 last_pic_structure, h->picture_structure);
3388 h->picture_structure = last_pic_structure;
3389 h->droppable = last_pic_droppable;
3390 return AVERROR_INVALIDDATA;
3391 } else if (last_pic_droppable != h->droppable) {
3392 avpriv_request_sample(h->avctx,
3393 "Found reference and non-reference fields in the same frame, which");
3394 h->picture_structure = last_pic_structure;
3395 h->droppable = last_pic_droppable;
3396 return AVERROR_PATCHWELCOME;
3402 while (h->frame_num != h->prev_frame_num &&
3403 h->frame_num != (h->prev_frame_num + 1) % (1 << h->sps.log2_max_frame_num)) {
3404 Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
3405 av_log(h->avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n",
3406 h->frame_num, h->prev_frame_num);
3407 if (h264_frame_start(h) < 0)
3409 h->prev_frame_num++;
3410 h->prev_frame_num %= 1 << h->sps.log2_max_frame_num;
3411 h->cur_pic_ptr->frame_num = h->prev_frame_num;
3412 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 0);
3413 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 1);
3414 if ((ret = ff_generate_sliding_window_mmcos(h, 1)) < 0 &&
3415 h->avctx->err_recognition & AV_EF_EXPLODE)
3417 if (ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index) < 0 &&
3418 (h->avctx->err_recognition & AV_EF_EXPLODE))
3419 return AVERROR_INVALIDDATA;
3420 /* Error concealment: if a ref is missing, copy the previous ref in its place.
3421 * FIXME: avoiding a memcpy would be nice, but ref handling makes many assumptions
3422 * about there being no actual duplicates.
3423 * FIXME: this doesn't copy padding for out-of-frame motion vectors. Given we're
3424 * concealing a lost frame, this probably isn't noticeable by comparison, but it should
3426 if (h->short_ref_count) {
3428 av_image_copy(h->short_ref[0]->f.data, h->short_ref[0]->f.linesize,
3429 (const uint8_t **)prev->f.data, prev->f.linesize,
3430 h->avctx->pix_fmt, h->mb_width * 16, h->mb_height * 16);
3431 h->short_ref[0]->poc = prev->poc + 2;
3433 h->short_ref[0]->frame_num = h->prev_frame_num;
3437 /* See if we have a decoded first field looking for a pair...
3438 * We're using that to see whether to continue decoding in that
3439 * frame, or to allocate a new one. */
3440 if (h0->first_field) {
3441 assert(h0->cur_pic_ptr);
3442 assert(h0->cur_pic_ptr->f.data[0]);
3443 assert(h0->cur_pic_ptr->reference != DELAYED_PIC_REF);
3445 /* figure out if we have a complementary field pair */
3446 if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
3447 /* Previous field is unmatched. Don't display it, but let it
3448 * remain for reference if marked as such. */
3449 h0->cur_pic_ptr = NULL;
3450 h0->first_field = FIELD_PICTURE(h);
3452 if (h0->cur_pic_ptr->frame_num != h->frame_num) {
3453 /* This and the previous field had different frame_nums.
3454 * Consider this field first in pair. Throw away previous
3455 * one except for reference purposes. */
3456 h0->first_field = 1;
3457 h0->cur_pic_ptr = NULL;
3459 /* Second field in complementary pair */
3460 h0->first_field = 0;
3464 /* Frame or first field in a potentially complementary pair */
3465 h0->first_field = FIELD_PICTURE(h);
3468 if (!FIELD_PICTURE(h) || h0->first_field) {
3469 if (h264_frame_start(h) < 0) {
3470 h0->first_field = 0;
3474 release_unused_pictures(h, 0);
3477 if (h != h0 && (ret = clone_slice(h, h0)) < 0)
3480 h->cur_pic_ptr->frame_num = h->frame_num; // FIXME frame_num cleanup
3482 assert(h->mb_num == h->mb_width * h->mb_height);
3483 if (first_mb_in_slice << FIELD_OR_MBAFF_PICTURE(h) >= h->mb_num ||
3484 first_mb_in_slice >= h->mb_num) {
3485 av_log(h->avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
3488 h->resync_mb_x = h->mb_x = first_mb_in_slice % h->mb_width;
3489 h->resync_mb_y = h->mb_y = (first_mb_in_slice / h->mb_width) << FIELD_OR_MBAFF_PICTURE(h);
3490 if (h->picture_structure == PICT_BOTTOM_FIELD)
3491 h->resync_mb_y = h->mb_y = h->mb_y + 1;
3492 assert(h->mb_y < h->mb_height);
3494 if (h->picture_structure == PICT_FRAME) {
3495 h->curr_pic_num = h->frame_num;
3496 h->max_pic_num = 1 << h->sps.log2_max_frame_num;
3498 h->curr_pic_num = 2 * h->frame_num + 1;
3499 h->max_pic_num = 1 << (h->sps.log2_max_frame_num + 1);
3502 if (h->nal_unit_type == NAL_IDR_SLICE)
3503 get_ue_golomb(&h->gb); /* idr_pic_id */
3505 if (h->sps.poc_type == 0) {
3506 h->poc_lsb = get_bits(&h->gb, h->sps.log2_max_poc_lsb);
3508 if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
3509 h->delta_poc_bottom = get_se_golomb(&h->gb);
3512 if (h->sps.poc_type == 1 && !h->sps.delta_pic_order_always_zero_flag) {
3513 h->delta_poc[0] = get_se_golomb(&h->gb);
3515 if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
3516 h->delta_poc[1] = get_se_golomb(&h->gb);
3519 ff_init_poc(h, h->cur_pic_ptr->field_poc, &h->cur_pic_ptr->poc);
3521 if (h->pps.redundant_pic_cnt_present)
3522 h->redundant_pic_count = get_ue_golomb(&h->gb);
3524 // set defaults, might be overridden a few lines later
3525 h->ref_count[0] = h->pps.ref_count[0];
3526 h->ref_count[1] = h->pps.ref_count[1];
3528 if (h->slice_type_nos != AV_PICTURE_TYPE_I) {
3529 if (h->slice_type_nos == AV_PICTURE_TYPE_B)
3530 h->direct_spatial_mv_pred = get_bits1(&h->gb);
3531 num_ref_idx_active_override_flag = get_bits1(&h->gb);
3533 if (num_ref_idx_active_override_flag) {
3534 h->ref_count[0] = get_ue_golomb(&h->gb) + 1;
3535 if (h->ref_count[0] < 1)
3536 return AVERROR_INVALIDDATA;
3537 if (h->slice_type_nos == AV_PICTURE_TYPE_B) {
3538 h->ref_count[1] = get_ue_golomb(&h->gb) + 1;
3539 if (h->ref_count[1] < 1)
3540 return AVERROR_INVALIDDATA;
3544 if (h->slice_type_nos == AV_PICTURE_TYPE_B)
3550 h->ref_count[0] = h->ref_count[1] = 0;
3554 max_refs = h->picture_structure == PICT_FRAME ? 16 : 32;
3556 if (h->ref_count[0] > max_refs || h->ref_count[1] > max_refs) {
3557 av_log(h->avctx, AV_LOG_ERROR, "reference overflow\n");
3558 h->ref_count[0] = h->ref_count[1] = 0;
3559 return AVERROR_INVALIDDATA;
3562 if (!default_ref_list_done)
3563 ff_h264_fill_default_ref_list(h);
3565 if (h->slice_type_nos != AV_PICTURE_TYPE_I &&
3566 ff_h264_decode_ref_pic_list_reordering(h) < 0) {
3567 h->ref_count[1] = h->ref_count[0] = 0;
3571 if ((h->pps.weighted_pred && h->slice_type_nos == AV_PICTURE_TYPE_P) ||
3572 (h->pps.weighted_bipred_idc == 1 &&
3573 h->slice_type_nos == AV_PICTURE_TYPE_B))
3574 pred_weight_table(h);
3575 else if (h->pps.weighted_bipred_idc == 2 &&
3576 h->slice_type_nos == AV_PICTURE_TYPE_B) {
3577 implicit_weight_table(h, -1);
3580 for (i = 0; i < 2; i++) {
3581 h->luma_weight_flag[i] = 0;
3582 h->chroma_weight_flag[i] = 0;
3586 // If frame-mt is enabled, only update mmco tables for the first slice
3587 // in a field. Subsequent slices can temporarily clobber h->mmco_index
3588 // or h->mmco, which will cause ref list mix-ups and decoding errors
3589 // further down the line. This may break decoding if the first slice is
3590 // corrupt, thus we only do this if frame-mt is enabled.
3591 if (h->nal_ref_idc &&
3592 ff_h264_decode_ref_pic_marking(h0, &h->gb,
3593 !(h->avctx->active_thread_type & FF_THREAD_FRAME) ||
3594 h0->current_slice == 0) < 0 &&
3595 (h->avctx->err_recognition & AV_EF_EXPLODE))
3596 return AVERROR_INVALIDDATA;
3598 if (FRAME_MBAFF(h)) {
3599 ff_h264_fill_mbaff_ref_list(h);
3601 if (h->pps.weighted_bipred_idc == 2 && h->slice_type_nos == AV_PICTURE_TYPE_B) {
3602 implicit_weight_table(h, 0);
3603 implicit_weight_table(h, 1);
3607 if (h->slice_type_nos == AV_PICTURE_TYPE_B && !h->direct_spatial_mv_pred)
3608 ff_h264_direct_dist_scale_factor(h);
3609 ff_h264_direct_ref_list_init(h);
3611 if (h->slice_type_nos != AV_PICTURE_TYPE_I && h->pps.cabac) {
3612 tmp = get_ue_golomb_31(&h->gb);
3614 av_log(h->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
3617 h->cabac_init_idc = tmp;
3620 h->last_qscale_diff = 0;
3621 tmp = h->pps.init_qp + get_se_golomb(&h->gb);
3622 if (tmp > 51 + 6 * (h->sps.bit_depth_luma - 8)) {
3623 av_log(h->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
3627 h->chroma_qp[0] = get_chroma_qp(h, 0, h->qscale);
3628 h->chroma_qp[1] = get_chroma_qp(h, 1, h->qscale);
3629 // FIXME qscale / qp ... stuff
3630 if (h->slice_type == AV_PICTURE_TYPE_SP)
3631 get_bits1(&h->gb); /* sp_for_switch_flag */
3632 if (h->slice_type == AV_PICTURE_TYPE_SP ||
3633 h->slice_type == AV_PICTURE_TYPE_SI)
3634 get_se_golomb(&h->gb); /* slice_qs_delta */
3636 h->deblocking_filter = 1;
3637 h->slice_alpha_c0_offset = 52;
3638 h->slice_beta_offset = 52;
3639 if (h->pps.deblocking_filter_parameters_present) {
3640 tmp = get_ue_golomb_31(&h->gb);
3642 av_log(h->avctx, AV_LOG_ERROR,
3643 "deblocking_filter_idc %u out of range\n", tmp);
3646 h->deblocking_filter = tmp;
3647 if (h->deblocking_filter < 2)
3648 h->deblocking_filter ^= 1; // 1<->0
3650 if (h->deblocking_filter) {
3651 h->slice_alpha_c0_offset += get_se_golomb(&h->gb) << 1;
3652 h->slice_beta_offset += get_se_golomb(&h->gb) << 1;
3653 if (h->slice_alpha_c0_offset > 104U ||
3654 h->slice_beta_offset > 104U) {
3655 av_log(h->avctx, AV_LOG_ERROR,
3656 "deblocking filter parameters %d %d out of range\n",
3657 h->slice_alpha_c0_offset, h->slice_beta_offset);
3663 if (h->avctx->skip_loop_filter >= AVDISCARD_ALL ||
3664 (h->avctx->skip_loop_filter >= AVDISCARD_NONKEY &&
3665 h->slice_type_nos != AV_PICTURE_TYPE_I) ||
3666 (h->avctx->skip_loop_filter >= AVDISCARD_BIDIR &&
3667 h->slice_type_nos == AV_PICTURE_TYPE_B) ||
3668 (h->avctx->skip_loop_filter >= AVDISCARD_NONREF &&
3669 h->nal_ref_idc == 0))
3670 h->deblocking_filter = 0;
3672 if (h->deblocking_filter == 1 && h0->max_contexts > 1) {
3673 if (h->avctx->flags2 & CODEC_FLAG2_FAST) {
3674 /* Cheat slightly for speed:
3675 * Do not bother to deblock across slices. */
3676 h->deblocking_filter = 2;
3678 h0->max_contexts = 1;
3679 if (!h0->single_decode_warning) {
3680 av_log(h->avctx, AV_LOG_INFO,
3681 "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
3682 h0->single_decode_warning = 1;
3685 av_log(h->avctx, AV_LOG_ERROR,
3686 "Deblocking switched inside frame.\n");
3691 h->qp_thresh = 15 + 52 -
3692 FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset) -
3694 h->pps.chroma_qp_index_offset[0],
3695 h->pps.chroma_qp_index_offset[1]) +
3696 6 * (h->sps.bit_depth_luma - 8);
3698 h0->last_slice_type = slice_type;
3699 h->slice_num = ++h0->current_slice;
3700 if (h->slice_num >= MAX_SLICES) {
3701 av_log(h->avctx, AV_LOG_ERROR,
3702 "Too many slices, increase MAX_SLICES and recompile\n");
3705 for (j = 0; j < 2; j++) {
3707 int *ref2frm = h->ref2frm[h->slice_num & (MAX_SLICES - 1)][j];
3708 for (i = 0; i < 16; i++) {
3710 if (j < h->list_count && i < h->ref_count[j] && h->ref_list[j][i].f.buf[0]) {
3712 AVBuffer *buf = h->ref_list[j][i].f.buf[0]->buffer;
3713 for (k = 0; k < h->short_ref_count; k++)
3714 if (h->short_ref[k]->f.buf[0]->buffer == buf) {
3718 for (k = 0; k < h->long_ref_count; k++)
3719 if (h->long_ref[k] && h->long_ref[k]->f.buf[0]->buffer == buf) {
3720 id_list[i] = h->short_ref_count + k;
3728 for (i = 0; i < 16; i++)
3729 ref2frm[i + 2] = 4 * id_list[i] +
3730 (h->ref_list[j][i].reference & 3);
3732 ref2frm[18 + 1] = -1;
3733 for (i = 16; i < 48; i++)
3734 ref2frm[i + 4] = 4 * id_list[(i - 16) >> 1] +
3735 (h->ref_list[j][i].reference & 3);
3738 if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
3739 av_log(h->avctx, AV_LOG_DEBUG,
3740 "slice:%d %s mb:%d %c%s%s pps:%u frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
3742 (h->picture_structure == PICT_FRAME ? "F" : h->picture_structure == PICT_TOP_FIELD ? "T" : "B"),
3744 av_get_picture_type_char(h->slice_type),
3745 h->slice_type_fixed ? " fix" : "",
3746 h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
3747 pps_id, h->frame_num,
3748 h->cur_pic_ptr->field_poc[0],
3749 h->cur_pic_ptr->field_poc[1],
3750 h->ref_count[0], h->ref_count[1],
3752 h->deblocking_filter,
3753 h->slice_alpha_c0_offset / 2 - 26, h->slice_beta_offset / 2 - 26,
3755 h->use_weight == 1 && h->use_weight_chroma ? "c" : "",
3756 h->slice_type == AV_PICTURE_TYPE_B ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : "");
3762 int ff_h264_get_slice_type(const H264Context *h)
3764 switch (h->slice_type) {
3765 case AV_PICTURE_TYPE_P:
3767 case AV_PICTURE_TYPE_B:
3769 case AV_PICTURE_TYPE_I:
3771 case AV_PICTURE_TYPE_SP:
3773 case AV_PICTURE_TYPE_SI:
3780 static av_always_inline void fill_filter_caches_inter(H264Context *h,
3781 int mb_type, int top_xy,
3782 int left_xy[LEFT_MBS],
3784 int left_type[LEFT_MBS],
3785 int mb_xy, int list)
3787 int b_stride = h->b_stride;
3788 int16_t(*mv_dst)[2] = &h->mv_cache[list][scan8[0]];
3789 int8_t *ref_cache = &h->ref_cache[list][scan8[0]];
3790 if (IS_INTER(mb_type) || IS_DIRECT(mb_type)) {
3791 if (USES_LIST(top_type, list)) {
3792 const int b_xy = h->mb2b_xy[top_xy] + 3 * b_stride;
3793 const int b8_xy = 4 * top_xy + 2;
3794 int (*ref2frm)[64] = h->ref2frm[h->slice_table[top_xy] & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2);
3795 AV_COPY128(mv_dst - 1 * 8, h->cur_pic.motion_val[list][b_xy + 0]);
3796 ref_cache[0 - 1 * 8] =
3797 ref_cache[1 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 0]];
3798 ref_cache[2 - 1 * 8] =
3799 ref_cache[3 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 1]];
3801 AV_ZERO128(mv_dst - 1 * 8);
3802 AV_WN32A(&ref_cache[0 - 1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
3805 if (!IS_INTERLACED(mb_type ^ left_type[LTOP])) {
3806 if (USES_LIST(left_type[LTOP], list)) {
3807 const int b_xy = h->mb2b_xy[left_xy[LTOP]] + 3;
3808 const int b8_xy = 4 * left_xy[LTOP] + 1;
3809 int (*ref2frm)[64] = h->ref2frm[h->slice_table[left_xy[LTOP]] & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2);
3810 AV_COPY32(mv_dst - 1 + 0, h->cur_pic.motion_val[list][b_xy + b_stride * 0]);
3811 AV_COPY32(mv_dst - 1 + 8, h->cur_pic.motion_val[list][b_xy + b_stride * 1]);
3812 AV_COPY32(mv_dst - 1 + 16, h->cur_pic.motion_val[list][b_xy + b_stride * 2]);
3813 AV_COPY32(mv_dst - 1 + 24, h->cur_pic.motion_val[list][b_xy + b_stride * 3]);
3815 ref_cache[-1 + 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 0]];
3816 ref_cache[-1 + 16] =
3817 ref_cache[-1 + 24] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 1]];
3819 AV_ZERO32(mv_dst - 1 + 0);
3820 AV_ZERO32(mv_dst - 1 + 8);
3821 AV_ZERO32(mv_dst - 1 + 16);
3822 AV_ZERO32(mv_dst - 1 + 24);
3825 ref_cache[-1 + 16] =
3826 ref_cache[-1 + 24] = LIST_NOT_USED;
3831 if (!USES_LIST(mb_type, list)) {
3832 fill_rectangle(mv_dst, 4, 4, 8, pack16to32(0, 0), 4);
3833 AV_WN32A(&ref_cache[0 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
3834 AV_WN32A(&ref_cache[1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
3835 AV_WN32A(&ref_cache[2 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
3836 AV_WN32A(&ref_cache[3 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
3841 int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
3842 int (*ref2frm)[64] = h->ref2frm[h->slice_num & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2);
3843 uint32_t ref01 = (pack16to32(ref2frm[list][ref[0]], ref2frm[list][ref[1]]) & 0x00FF00FF) * 0x0101;
3844 uint32_t ref23 = (pack16to32(ref2frm[list][ref[2]], ref2frm[list][ref[3]]) & 0x00FF00FF) * 0x0101;
3845 AV_WN32A(&ref_cache[0 * 8], ref01);
3846 AV_WN32A(&ref_cache[1 * 8], ref01);
3847 AV_WN32A(&ref_cache[2 * 8], ref23);
3848 AV_WN32A(&ref_cache[3 * 8], ref23);
3852 int16_t(*mv_src)[2] = &h->cur_pic.motion_val[list][4 * h->mb_x + 4 * h->mb_y * b_stride];
3853 AV_COPY128(mv_dst + 8 * 0, mv_src + 0 * b_stride);
3854 AV_COPY128(mv_dst + 8 * 1, mv_src + 1 * b_stride);
3855 AV_COPY128(mv_dst + 8 * 2, mv_src + 2 * b_stride);
3856 AV_COPY128(mv_dst + 8 * 3, mv_src + 3 * b_stride);
3862 * @return non zero if the loop filter can be skipped
3864 static int fill_filter_caches(H264Context *h, int mb_type)
3866 const int mb_xy = h->mb_xy;
3867 int top_xy, left_xy[LEFT_MBS];
3868 int top_type, left_type[LEFT_MBS];
3872 top_xy = mb_xy - (h->mb_stride << MB_FIELD(h));
3874 /* Wow, what a mess, why didn't they simplify the interlacing & intra
3875 * stuff, I can't imagine that these complex rules are worth it. */
3877 left_xy[LBOT] = left_xy[LTOP] = mb_xy - 1;
3878 if (FRAME_MBAFF(h)) {
3879 const int left_mb_field_flag = IS_INTERLACED(h->cur_pic.mb_type[mb_xy - 1]);
3880 const int curr_mb_field_flag = IS_INTERLACED(mb_type);
3882 if (left_mb_field_flag != curr_mb_field_flag)
3883 left_xy[LTOP] -= h->mb_stride;
3885 if (curr_mb_field_flag)
3886 top_xy += h->mb_stride &
3887 (((h->cur_pic.mb_type[top_xy] >> 7) & 1) - 1);
3888 if (left_mb_field_flag != curr_mb_field_flag)
3889 left_xy[LBOT] += h->mb_stride;
3893 h->top_mb_xy = top_xy;
3894 h->left_mb_xy[LTOP] = left_xy[LTOP];
3895 h->left_mb_xy[LBOT] = left_xy[LBOT];
3897 /* For sufficiently low qp, filtering wouldn't do anything.
3898 * This is a conservative estimate: could also check beta_offset
3899 * and more accurate chroma_qp. */
3900 int qp_thresh = h->qp_thresh; // FIXME strictly we should store qp_thresh for each mb of a slice
3901 int qp = h->cur_pic.qscale_table[mb_xy];
3902 if (qp <= qp_thresh &&
3903 (left_xy[LTOP] < 0 ||
3904 ((qp + h->cur_pic.qscale_table[left_xy[LTOP]] + 1) >> 1) <= qp_thresh) &&
3906 ((qp + h->cur_pic.qscale_table[top_xy] + 1) >> 1) <= qp_thresh)) {
3907 if (!FRAME_MBAFF(h))
3909 if ((left_xy[LTOP] < 0 ||
3910 ((qp + h->cur_pic.qscale_table[left_xy[LBOT]] + 1) >> 1) <= qp_thresh) &&
3911 (top_xy < h->mb_stride ||
3912 ((qp + h->cur_pic.qscale_table[top_xy - h->mb_stride] + 1) >> 1) <= qp_thresh))
3917 top_type = h->cur_pic.mb_type[top_xy];
3918 left_type[LTOP] = h->cur_pic.mb_type[left_xy[LTOP]];
3919 left_type[LBOT] = h->cur_pic.mb_type[left_xy[LBOT]];
3920 if (h->deblocking_filter == 2) {
3921 if (h->slice_table[top_xy] != h->slice_num)
3923 if (h->slice_table[left_xy[LBOT]] != h->slice_num)
3924 left_type[LTOP] = left_type[LBOT] = 0;
3926 if (h->slice_table[top_xy] == 0xFFFF)
3928 if (h->slice_table[left_xy[LBOT]] == 0xFFFF)
3929 left_type[LTOP] = left_type[LBOT] = 0;
3931 h->top_type = top_type;
3932 h->left_type[LTOP] = left_type[LTOP];
3933 h->left_type[LBOT] = left_type[LBOT];
3935 if (IS_INTRA(mb_type))
3938 fill_filter_caches_inter(h, mb_type, top_xy, left_xy,
3939 top_type, left_type, mb_xy, 0);
3940 if (h->list_count == 2)
3941 fill_filter_caches_inter(h, mb_type, top_xy, left_xy,
3942 top_type, left_type, mb_xy, 1);
3944 nnz = h->non_zero_count[mb_xy];
3945 nnz_cache = h->non_zero_count_cache;
3946 AV_COPY32(&nnz_cache[4 + 8 * 1], &nnz[0]);
3947 AV_COPY32(&nnz_cache[4 + 8 * 2], &nnz[4]);
3948 AV_COPY32(&nnz_cache[4 + 8 * 3], &nnz[8]);
3949 AV_COPY32(&nnz_cache[4 + 8 * 4], &nnz[12]);
3950 h->cbp = h->cbp_table[mb_xy];
3953 nnz = h->non_zero_count[top_xy];
3954 AV_COPY32(&nnz_cache[4 + 8 * 0], &nnz[3 * 4]);
3957 if (left_type[LTOP]) {
3958 nnz = h->non_zero_count[left_xy[LTOP]];
3959 nnz_cache[3 + 8 * 1] = nnz[3 + 0 * 4];
3960 nnz_cache[3 + 8 * 2] = nnz[3 + 1 * 4];
3961 nnz_cache[3 + 8 * 3] = nnz[3 + 2 * 4];
3962 nnz_cache[3 + 8 * 4] = nnz[3 + 3 * 4];
3965 /* CAVLC 8x8dct requires NNZ values for residual decoding that differ
3966 * from what the loop filter needs */
3967 if (!CABAC(h) && h->pps.transform_8x8_mode) {
3968 if (IS_8x8DCT(top_type)) {
3969 nnz_cache[4 + 8 * 0] =
3970 nnz_cache[5 + 8 * 0] = (h->cbp_table[top_xy] & 0x4000) >> 12;
3971 nnz_cache[6 + 8 * 0] =
3972 nnz_cache[7 + 8 * 0] = (h->cbp_table[top_xy] & 0x8000) >> 12;
3974 if (IS_8x8DCT(left_type[LTOP])) {
3975 nnz_cache[3 + 8 * 1] =
3976 nnz_cache[3 + 8 * 2] = (h->cbp_table[left_xy[LTOP]] & 0x2000) >> 12; // FIXME check MBAFF
3978 if (IS_8x8DCT(left_type[LBOT])) {
3979 nnz_cache[3 + 8 * 3] =
3980 nnz_cache[3 + 8 * 4] = (h->cbp_table[left_xy[LBOT]] & 0x8000) >> 12; // FIXME check MBAFF
3983 if (IS_8x8DCT(mb_type)) {
3984 nnz_cache[scan8[0]] =
3985 nnz_cache[scan8[1]] =
3986 nnz_cache[scan8[2]] =
3987 nnz_cache[scan8[3]] = (h->cbp & 0x1000) >> 12;
3989 nnz_cache[scan8[0 + 4]] =
3990 nnz_cache[scan8[1 + 4]] =
3991 nnz_cache[scan8[2 + 4]] =
3992 nnz_cache[scan8[3 + 4]] = (h->cbp & 0x2000) >> 12;
3994 nnz_cache[scan8[0 + 8]] =
3995 nnz_cache[scan8[1 + 8]] =
3996 nnz_cache[scan8[2 + 8]] =
3997 nnz_cache[scan8[3 + 8]] = (h->cbp & 0x4000) >> 12;
3999 nnz_cache[scan8[0 + 12]] =
4000 nnz_cache[scan8[1 + 12]] =
4001 nnz_cache[scan8[2 + 12]] =
4002 nnz_cache[scan8[3 + 12]] = (h->cbp & 0x8000) >> 12;
4009 static void loop_filter(H264Context *h, int start_x, int end_x)
4011 uint8_t *dest_y, *dest_cb, *dest_cr;
4012 int linesize, uvlinesize, mb_x, mb_y;
4013 const int end_mb_y = h->mb_y + FRAME_MBAFF(h);
4014 const int old_slice_type = h->slice_type;
4015 const int pixel_shift = h->pixel_shift;
4016 const int block_h = 16 >> h->chroma_y_shift;
4018 if (h->deblocking_filter) {
4019 for (mb_x = start_x; mb_x < end_x; mb_x++)
4020 for (mb_y = end_mb_y - FRAME_MBAFF(h); mb_y <= end_mb_y; mb_y++) {
4022 mb_xy = h->mb_xy = mb_x + mb_y * h->mb_stride;
4023 h->slice_num = h->slice_table[mb_xy];
4024 mb_type = h->cur_pic.mb_type[mb_xy];
4025 h->list_count = h->list_counts[mb_xy];
4029 h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
4033 dest_y = h->cur_pic.f.data[0] +
4034 ((mb_x << pixel_shift) + mb_y * h->linesize) * 16;
4035 dest_cb = h->cur_pic.f.data[1] +
4036 (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
4037 mb_y * h->uvlinesize * block_h;
4038 dest_cr = h->cur_pic.f.data[2] +
4039 (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
4040 mb_y * h->uvlinesize * block_h;
4041 // FIXME simplify above
4044 linesize = h->mb_linesize = h->linesize * 2;
4045 uvlinesize = h->mb_uvlinesize = h->uvlinesize * 2;
4046 if (mb_y & 1) { // FIXME move out of this function?
4047 dest_y -= h->linesize * 15;
4048 dest_cb -= h->uvlinesize * (block_h - 1);
4049 dest_cr -= h->uvlinesize * (block_h - 1);
4052 linesize = h->mb_linesize = h->linesize;
4053 uvlinesize = h->mb_uvlinesize = h->uvlinesize;
4055 backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize,
4057 if (fill_filter_caches(h, mb_type))
4059 h->chroma_qp[0] = get_chroma_qp(h, 0, h->cur_pic.qscale_table[mb_xy]);
4060 h->chroma_qp[1] = get_chroma_qp(h, 1, h->cur_pic.qscale_table[mb_xy]);
4062 if (FRAME_MBAFF(h)) {
4063 ff_h264_filter_mb(h, mb_x, mb_y, dest_y, dest_cb, dest_cr,
4064 linesize, uvlinesize);
4066 ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb,
4067 dest_cr, linesize, uvlinesize);
4071 h->slice_type = old_slice_type;
4073 h->mb_y = end_mb_y - FRAME_MBAFF(h);
4074 h->chroma_qp[0] = get_chroma_qp(h, 0, h->qscale);
4075 h->chroma_qp[1] = get_chroma_qp(h, 1, h->qscale);
4078 static void predict_field_decoding_flag(H264Context *h)
4080 const int mb_xy = h->mb_x + h->mb_y * h->mb_stride;
4081 int mb_type = (h->slice_table[mb_xy - 1] == h->slice_num) ?
4082 h->cur_pic.mb_type[mb_xy - 1] :
4083 (h->slice_table[mb_xy - h->mb_stride] == h->slice_num) ?
4084 h->cur_pic.mb_type[mb_xy - h->mb_stride] : 0;
4085 h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
4089 * Draw edges and report progress for the last MB row.
4091 static void decode_finish_row(H264Context *h)
4093 int top = 16 * (h->mb_y >> FIELD_PICTURE(h));
4094 int pic_height = 16 * h->mb_height >> FIELD_PICTURE(h);
4095 int height = 16 << FRAME_MBAFF(h);
4096 int deblock_border = (16 + 4) << FRAME_MBAFF(h);
4098 if (h->deblocking_filter) {
4099 if ((top + height) >= pic_height)
4100 height += deblock_border;
4101 top -= deblock_border;
4104 if (top >= pic_height || (top + height) < 0)
4107 height = FFMIN(height, pic_height - top);
4109 height = top + height;
4113 ff_h264_draw_horiz_band(h, top, height);
4118 ff_thread_report_progress(&h->cur_pic_ptr->tf, top + height - 1,
4119 h->picture_structure == PICT_BOTTOM_FIELD);
4122 static void er_add_slice(H264Context *h, int startx, int starty,
4123 int endx, int endy, int status)
4125 #if CONFIG_ERROR_RESILIENCE
4126 ERContext *er = &h->er;
4128 er->ref_count = h->ref_count[0];
4129 ff_er_add_slice(er, startx, starty, endx, endy, status);
4133 static int decode_slice(struct AVCodecContext *avctx, void *arg)
4135 H264Context *h = *(void **)arg;
4136 int lf_x_start = h->mb_x;
4138 h->mb_skip_run = -1;
4140 h->is_complex = FRAME_MBAFF(h) || h->picture_structure != PICT_FRAME ||
4141 avctx->codec_id != AV_CODEC_ID_H264 ||
4142 (CONFIG_GRAY && (h->flags & CODEC_FLAG_GRAY));
4146 align_get_bits(&h->gb);
4149 ff_init_cabac_states();
4150 ff_init_cabac_decoder(&h->cabac,
4151 h->gb.buffer + get_bits_count(&h->gb) / 8,
4152 (get_bits_left(&h->gb) + 7) / 8);
4154 ff_h264_init_cabac_states(h);
4158 int ret = ff_h264_decode_mb_cabac(h);
4160 // STOP_TIMER("decode_mb_cabac")
4163 ff_h264_hl_decode_mb(h);
4165 // FIXME optimal? or let mb_decode decode 16x32 ?
4166 if (ret >= 0 && FRAME_MBAFF(h)) {
4169 ret = ff_h264_decode_mb_cabac(h);
4172 ff_h264_hl_decode_mb(h);
4175 eos = get_cabac_terminate(&h->cabac);
4177 if ((h->workaround_bugs & FF_BUG_TRUNCATED) &&
4178 h->cabac.bytestream > h->cabac.bytestream_end + 2) {
4179 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x - 1,
4180 h->mb_y, ER_MB_END);
4181 if (h->mb_x >= lf_x_start)
4182 loop_filter(h, lf_x_start, h->mb_x + 1);
4185 if (ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
4186 av_log(h->avctx, AV_LOG_ERROR,
4187 "error while decoding MB %d %d, bytestream (%td)\n",
4189 h->cabac.bytestream_end - h->cabac.bytestream);
4190 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
4191 h->mb_y, ER_MB_ERROR);
4195 if (++h->mb_x >= h->mb_width) {
4196 loop_filter(h, lf_x_start, h->mb_x);
4197 h->mb_x = lf_x_start = 0;
4198 decode_finish_row(h);
4200 if (FIELD_OR_MBAFF_PICTURE(h)) {
4202 if (FRAME_MBAFF(h) && h->mb_y < h->mb_height)
4203 predict_field_decoding_flag(h);
4207 if (eos || h->mb_y >= h->mb_height) {
4208 tprintf(h->avctx, "slice end %d %d\n",
4209 get_bits_count(&h->gb), h->gb.size_in_bits);
4210 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x - 1,
4211 h->mb_y, ER_MB_END);
4212 if (h->mb_x > lf_x_start)
4213 loop_filter(h, lf_x_start, h->mb_x);
4219 int ret = ff_h264_decode_mb_cavlc(h);
4222 ff_h264_hl_decode_mb(h);
4224 // FIXME optimal? or let mb_decode decode 16x32 ?
4225 if (ret >= 0 && FRAME_MBAFF(h)) {
4227 ret = ff_h264_decode_mb_cavlc(h);
4230 ff_h264_hl_decode_mb(h);
4235 av_log(h->avctx, AV_LOG_ERROR,
4236 "error while decoding MB %d %d\n", h->mb_x, h->mb_y);
4237 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
4238 h->mb_y, ER_MB_ERROR);
4242 if (++h->mb_x >= h->mb_width) {
4243 loop_filter(h, lf_x_start, h->mb_x);
4244 h->mb_x = lf_x_start = 0;
4245 decode_finish_row(h);
4247 if (FIELD_OR_MBAFF_PICTURE(h)) {
4249 if (FRAME_MBAFF(h) && h->mb_y < h->mb_height)
4250 predict_field_decoding_flag(h);
4252 if (h->mb_y >= h->mb_height) {
4253 tprintf(h->avctx, "slice end %d %d\n",
4254 get_bits_count(&h->gb), h->gb.size_in_bits);
4256 if (get_bits_left(&h->gb) == 0) {
4257 er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
4258 h->mb_x - 1, h->mb_y,
4263 er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
4264 h->mb_x - 1, h->mb_y,
4272 if (get_bits_left(&h->gb) <= 0 && h->mb_skip_run <= 0) {
4273 tprintf(h->avctx, "slice end %d %d\n",
4274 get_bits_count(&h->gb), h->gb.size_in_bits);
4275 if (get_bits_left(&h->gb) == 0) {
4276 er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
4277 h->mb_x - 1, h->mb_y,
4279 if (h->mb_x > lf_x_start)
4280 loop_filter(h, lf_x_start, h->mb_x);
4284 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
4285 h->mb_y, ER_MB_ERROR);
4295 * Call decode_slice() for each context.
4297 * @param h h264 master context
4298 * @param context_count number of contexts to execute
4300 static int execute_decode_slices(H264Context *h, int context_count)
4302 AVCodecContext *const avctx = h->avctx;
4306 if (h->avctx->hwaccel ||
4307 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
4309 if (context_count == 1) {
4310 return decode_slice(avctx, &h);
4312 for (i = 1; i < context_count; i++) {
4313 hx = h->thread_context[i];
4314 hx->er.error_count = 0;
4317 avctx->execute(avctx, decode_slice, h->thread_context,
4318 NULL, context_count, sizeof(void *));
4320 /* pull back stuff from slices to master context */
4321 hx = h->thread_context[context_count - 1];
4324 h->droppable = hx->droppable;
4325 h->picture_structure = hx->picture_structure;
4326 for (i = 1; i < context_count; i++)
4327 h->er.error_count += h->thread_context[i]->er.error_count;
4333 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
4334 int parse_extradata)
4336 AVCodecContext *const avctx = h->avctx;
4337 H264Context *hx; ///< thread context
4341 int pass = !(avctx->active_thread_type & FF_THREAD_FRAME);
4342 int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
4345 h->max_contexts = h->slice_context_count;
4346 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS)) {
4347 h->current_slice = 0;
4348 if (!h->first_field)
4349 h->cur_pic_ptr = NULL;
4350 ff_h264_reset_sei(h);
4353 for (; pass <= 1; pass++) {
4356 next_avc = h->is_avc ? 0 : buf_size;
4366 if (buf_index >= next_avc) {
4367 if (buf_index >= buf_size - h->nal_length_size)
4370 for (i = 0; i < h->nal_length_size; i++)
4371 nalsize = (nalsize << 8) | buf[buf_index++];
4372 if (nalsize <= 0 || nalsize > buf_size - buf_index) {
4373 av_log(h->avctx, AV_LOG_ERROR,
4374 "AVC: nal size %d\n", nalsize);
4377 next_avc = buf_index + nalsize;
4379 // start code prefix search
4380 for (; buf_index + 3 < next_avc; buf_index++)
4381 // This should always succeed in the first iteration.
4382 if (buf[buf_index] == 0 &&
4383 buf[buf_index + 1] == 0 &&
4384 buf[buf_index + 2] == 1)
4387 if (buf_index + 3 >= buf_size) {
4388 buf_index = buf_size;
4393 if (buf_index >= next_avc)
4397 hx = h->thread_context[context_count];
4399 ptr = ff_h264_decode_nal(hx, buf + buf_index, &dst_length,
4400 &consumed, next_avc - buf_index);
4401 if (ptr == NULL || dst_length < 0) {
4405 i = buf_index + consumed;
4406 if ((h->workaround_bugs & FF_BUG_AUTODETECT) && i + 3 < next_avc &&
4407 buf[i] == 0x00 && buf[i + 1] == 0x00 &&
4408 buf[i + 2] == 0x01 && buf[i + 3] == 0xE0)
4409 h->workaround_bugs |= FF_BUG_TRUNCATED;
4411 if (!(h->workaround_bugs & FF_BUG_TRUNCATED))
4412 while (ptr[dst_length - 1] == 0 && dst_length > 0)
4414 bit_length = !dst_length ? 0
4416 decode_rbsp_trailing(h, ptr + dst_length - 1));
4418 if (h->avctx->debug & FF_DEBUG_STARTCODE)
4419 av_log(h->avctx, AV_LOG_DEBUG,
4420 "NAL %d at %d/%d length %d\n",
4421 hx->nal_unit_type, buf_index, buf_size, dst_length);
4423 if (h->is_avc && (nalsize != consumed) && nalsize)
4424 av_log(h->avctx, AV_LOG_DEBUG,
4425 "AVC: Consumed only %d bytes instead of %d\n",
4428 buf_index += consumed;
4432 /* packets can sometimes contain multiple PPS/SPS,
4433 * e.g. two PAFF field pictures in one packet, or a demuxer
4434 * which splits NALs strangely if so, when frame threading we
4435 * can't start the next thread until we've read all of them */
4436 switch (hx->nal_unit_type) {
4439 nals_needed = nal_index;
4444 init_get_bits(&hx->gb, ptr, bit_length);
4445 if (!get_ue_golomb(&hx->gb))
4446 nals_needed = nal_index;
4451 // FIXME do not discard SEI id
4452 if (avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc == 0)
4456 /* Ignore every NAL unit type except PPS and SPS during extradata
4457 * parsing. Decoding slices is not possible in codec init
4459 if (parse_extradata && HAVE_THREADS &&
4460 (h->avctx->active_thread_type & FF_THREAD_FRAME) &&
4461 (hx->nal_unit_type != NAL_PPS &&
4462 hx->nal_unit_type != NAL_SPS)) {
4463 av_log(avctx, AV_LOG_INFO, "Ignoring NAL unit %d during "
4464 "extradata parsing\n", hx->nal_unit_type);
4465 hx->nal_unit_type = NAL_FF_IGNORE;
4468 switch (hx->nal_unit_type) {
4470 if (h->nal_unit_type != NAL_IDR_SLICE) {
4471 av_log(h->avctx, AV_LOG_ERROR,
4472 "Invalid mix of idr and non-idr slices\n");
4476 idr(h); // FIXME ensure we don't lose some frames if there is reordering
4478 init_get_bits(&hx->gb, ptr, bit_length);
4480 hx->inter_gb_ptr = &hx->gb;
4481 hx->data_partitioning = 0;
4483 if ((err = decode_slice_header(hx, h)))
4486 h->cur_pic_ptr->f.key_frame |=
4487 (hx->nal_unit_type == NAL_IDR_SLICE) ||
4488 (h->sei_recovery_frame_cnt >= 0);
4490 if (h->current_slice == 1) {
4491 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS))
4492 decode_postinit(h, nal_index >= nals_needed);
4494 if (h->avctx->hwaccel &&
4495 h->avctx->hwaccel->start_frame(h->avctx, NULL, 0) < 0)
4497 if (CONFIG_H264_VDPAU_DECODER &&
4498 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
4499 ff_vdpau_h264_picture_start(h);
4502 if (hx->redundant_pic_count == 0 &&
4503 (avctx->skip_frame < AVDISCARD_NONREF ||
4505 (avctx->skip_frame < AVDISCARD_BIDIR ||
4506 hx->slice_type_nos != AV_PICTURE_TYPE_B) &&
4507 (avctx->skip_frame < AVDISCARD_NONKEY ||
4508 hx->slice_type_nos == AV_PICTURE_TYPE_I) &&
4509 avctx->skip_frame < AVDISCARD_ALL) {
4510 if (avctx->hwaccel) {
4511 if (avctx->hwaccel->decode_slice(avctx,
4512 &buf[buf_index - consumed],
4515 } else if (CONFIG_H264_VDPAU_DECODER &&
4516 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) {
4517 static const uint8_t start_code[] = {
4519 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f.data[0], start_code,
4520 sizeof(start_code));
4521 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f.data[0], &buf[buf_index - consumed],
4528 init_get_bits(&hx->gb, ptr, bit_length);
4530 hx->inter_gb_ptr = NULL;
4532 if ((err = decode_slice_header(hx, h)) < 0)
4535 hx->data_partitioning = 1;
4538 init_get_bits(&hx->intra_gb, ptr, bit_length);
4539 hx->intra_gb_ptr = &hx->intra_gb;
4542 init_get_bits(&hx->inter_gb, ptr, bit_length);
4543 hx->inter_gb_ptr = &hx->inter_gb;
4545 if (hx->redundant_pic_count == 0 &&
4547 hx->data_partitioning &&
4548 h->cur_pic_ptr && h->context_initialized &&
4549 (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc) &&
4550 (avctx->skip_frame < AVDISCARD_BIDIR ||
4551 hx->slice_type_nos != AV_PICTURE_TYPE_B) &&
4552 (avctx->skip_frame < AVDISCARD_NONKEY ||
4553 hx->slice_type_nos == AV_PICTURE_TYPE_I) &&
4554 avctx->skip_frame < AVDISCARD_ALL)
4558 init_get_bits(&h->gb, ptr, bit_length);
4559 ff_h264_decode_sei(h);
4562 init_get_bits(&h->gb, ptr, bit_length);
4563 if (ff_h264_decode_seq_parameter_set(h) < 0 &&
4564 h->is_avc && (nalsize != consumed) && nalsize) {
4565 av_log(h->avctx, AV_LOG_DEBUG,
4566 "SPS decoding failure, trying again with the complete NAL\n");
4567 init_get_bits(&h->gb, buf + buf_index + 1 - consumed,
4569 ff_h264_decode_seq_parameter_set(h);
4572 if (h264_set_parameter_from_sps(h) < 0) {
4578 init_get_bits(&h->gb, ptr, bit_length);
4579 ff_h264_decode_picture_parameter_set(h, bit_length);
4582 case NAL_END_SEQUENCE:
4583 case NAL_END_STREAM:
4584 case NAL_FILLER_DATA:
4586 case NAL_AUXILIARY_SLICE:
4591 av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
4592 hx->nal_unit_type, bit_length);
4595 if (context_count == h->max_contexts) {
4596 execute_decode_slices(h, context_count);
4601 av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
4602 else if (err == 1) {
4603 /* Slice could not be decoded in parallel mode, copy down
4604 * NAL unit stuff to context 0 and restart. Note that
4605 * rbsp_buffer is not transferred, but since we no longer
4606 * run in parallel mode this should not be an issue. */
4607 h->nal_unit_type = hx->nal_unit_type;
4608 h->nal_ref_idc = hx->nal_ref_idc;
4615 execute_decode_slices(h, context_count);
4619 if (h->cur_pic_ptr && !h->droppable) {
4620 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
4621 h->picture_structure == PICT_BOTTOM_FIELD);
4628 * Return the number of bytes consumed for building the current frame.
4630 static int get_consumed_bytes(int pos, int buf_size)
4633 pos = 1; // avoid infinite loops (i doubt that is needed but ...)
4634 if (pos + 10 > buf_size)
4635 pos = buf_size; // oops ;)
4640 static int output_frame(H264Context *h, AVFrame *dst, AVFrame *src)
4643 int ret = av_frame_ref(dst, src);
4650 for (i = 0; i < 3; i++) {
4651 int hshift = (i > 0) ? h->chroma_x_shift : 0;
4652 int vshift = (i > 0) ? h->chroma_y_shift : 0;
4653 int off = ((h->sps.crop_left >> hshift) << h->pixel_shift) +
4654 (h->sps.crop_top >> vshift) * dst->linesize[i];
4655 dst->data[i] += off;
4660 static int decode_frame(AVCodecContext *avctx, void *data,
4661 int *got_frame, AVPacket *avpkt)
4663 const uint8_t *buf = avpkt->data;
4664 int buf_size = avpkt->size;
4665 H264Context *h = avctx->priv_data;
4666 AVFrame *pict = data;
4670 h->flags = avctx->flags;
4672 /* end of stream, output what is still in the buffers */
4674 if (buf_size == 0) {
4678 h->cur_pic_ptr = NULL;
4680 // FIXME factorize this with the output code below
4681 out = h->delayed_pic[0];
4684 h->delayed_pic[i] &&
4685 !h->delayed_pic[i]->f.key_frame &&
4686 !h->delayed_pic[i]->mmco_reset;
4688 if (h->delayed_pic[i]->poc < out->poc) {
4689 out = h->delayed_pic[i];
4693 for (i = out_idx; h->delayed_pic[i]; i++)
4694 h->delayed_pic[i] = h->delayed_pic[i + 1];
4697 ret = output_frame(h, pict, &out->f);
4706 buf_index = decode_nal_units(h, buf, buf_size, 0);
4710 if (!h->cur_pic_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
4715 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS) && !h->cur_pic_ptr) {
4716 if (avctx->skip_frame >= AVDISCARD_NONREF)
4718 av_log(avctx, AV_LOG_ERROR, "no frame!\n");
4722 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS) ||
4723 (h->mb_y >= h->mb_height && h->mb_height)) {
4724 if (avctx->flags2 & CODEC_FLAG2_CHUNKS)
4725 decode_postinit(h, 1);
4729 if (!h->next_output_pic) {
4730 /* Wait for second field. */
4733 ret = output_frame(h, pict, &h->next_output_pic->f);
4740 assert(pict->data[0] || !*got_frame);
4742 return get_consumed_bytes(buf_index, buf_size);
4745 av_cold void ff_h264_free_context(H264Context *h)
4749 free_tables(h, 1); // FIXME cleanup init stuff perhaps
4751 for (i = 0; i < MAX_SPS_COUNT; i++)
4752 av_freep(h->sps_buffers + i);
4754 for (i = 0; i < MAX_PPS_COUNT; i++)
4755 av_freep(h->pps_buffers + i);
4758 static av_cold int h264_decode_end(AVCodecContext *avctx)
4760 H264Context *h = avctx->priv_data;
4762 ff_h264_free_context(h);
4764 unref_picture(h, &h->cur_pic);
4769 static const AVProfile profiles[] = {
4770 { FF_PROFILE_H264_BASELINE, "Baseline" },
4771 { FF_PROFILE_H264_CONSTRAINED_BASELINE, "Constrained Baseline" },
4772 { FF_PROFILE_H264_MAIN, "Main" },
4773 { FF_PROFILE_H264_EXTENDED, "Extended" },
4774 { FF_PROFILE_H264_HIGH, "High" },
4775 { FF_PROFILE_H264_HIGH_10, "High 10" },
4776 { FF_PROFILE_H264_HIGH_10_INTRA, "High 10 Intra" },
4777 { FF_PROFILE_H264_HIGH_422, "High 4:2:2" },
4778 { FF_PROFILE_H264_HIGH_422_INTRA, "High 4:2:2 Intra" },
4779 { FF_PROFILE_H264_HIGH_444, "High 4:4:4" },
4780 { FF_PROFILE_H264_HIGH_444_PREDICTIVE, "High 4:4:4 Predictive" },
4781 { FF_PROFILE_H264_HIGH_444_INTRA, "High 4:4:4 Intra" },
4782 { FF_PROFILE_H264_CAVLC_444, "CAVLC 4:4:4" },
4783 { FF_PROFILE_UNKNOWN },
4786 AVCodec ff_h264_decoder = {
4788 .type = AVMEDIA_TYPE_VIDEO,
4789 .id = AV_CODEC_ID_H264,
4790 .priv_data_size = sizeof(H264Context),
4791 .init = ff_h264_decode_init,
4792 .close = h264_decode_end,
4793 .decode = decode_frame,
4794 .capabilities = /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 |
4795 CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS |
4796 CODEC_CAP_FRAME_THREADS,
4798 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
4799 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
4800 .update_thread_context = ONLY_IF_THREADS_ENABLED(decode_update_thread_context),
4801 .profiles = NULL_IF_CONFIG_SMALL(profiles),
4804 #if CONFIG_H264_VDPAU_DECODER
4805 AVCodec ff_h264_vdpau_decoder = {
4806 .name = "h264_vdpau",
4807 .type = AVMEDIA_TYPE_VIDEO,
4808 .id = AV_CODEC_ID_H264,
4809 .priv_data_size = sizeof(H264Context),
4810 .init = ff_h264_decode_init,
4811 .close = h264_decode_end,
4812 .decode = decode_frame,
4813 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
4815 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
4816 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_VDPAU_H264,
4818 .profiles = NULL_IF_CONFIG_SMALL(profiles),