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/avassert.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/timer.h"
33 #include "cabac_functions.h"
34 #include "error_resilience.h"
38 #include "h264chroma.h"
39 #include "h264_mvpred.h"
42 #include "mpegutils.h"
43 #include "rectangle.h"
47 static const uint8_t rem6[QP_MAX_NUM + 1] = {
48 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2,
49 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
50 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
53 static const uint8_t div6[QP_MAX_NUM + 1] = {
54 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3,
55 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
56 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10,
59 static const uint8_t field_scan[16] = {
60 0 + 0 * 4, 0 + 1 * 4, 1 + 0 * 4, 0 + 2 * 4,
61 0 + 3 * 4, 1 + 1 * 4, 1 + 2 * 4, 1 + 3 * 4,
62 2 + 0 * 4, 2 + 1 * 4, 2 + 2 * 4, 2 + 3 * 4,
63 3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4, 3 + 3 * 4,
66 static const uint8_t field_scan8x8[64] = {
67 0 + 0 * 8, 0 + 1 * 8, 0 + 2 * 8, 1 + 0 * 8,
68 1 + 1 * 8, 0 + 3 * 8, 0 + 4 * 8, 1 + 2 * 8,
69 2 + 0 * 8, 1 + 3 * 8, 0 + 5 * 8, 0 + 6 * 8,
70 0 + 7 * 8, 1 + 4 * 8, 2 + 1 * 8, 3 + 0 * 8,
71 2 + 2 * 8, 1 + 5 * 8, 1 + 6 * 8, 1 + 7 * 8,
72 2 + 3 * 8, 3 + 1 * 8, 4 + 0 * 8, 3 + 2 * 8,
73 2 + 4 * 8, 2 + 5 * 8, 2 + 6 * 8, 2 + 7 * 8,
74 3 + 3 * 8, 4 + 1 * 8, 5 + 0 * 8, 4 + 2 * 8,
75 3 + 4 * 8, 3 + 5 * 8, 3 + 6 * 8, 3 + 7 * 8,
76 4 + 3 * 8, 5 + 1 * 8, 6 + 0 * 8, 5 + 2 * 8,
77 4 + 4 * 8, 4 + 5 * 8, 4 + 6 * 8, 4 + 7 * 8,
78 5 + 3 * 8, 6 + 1 * 8, 6 + 2 * 8, 5 + 4 * 8,
79 5 + 5 * 8, 5 + 6 * 8, 5 + 7 * 8, 6 + 3 * 8,
80 7 + 0 * 8, 7 + 1 * 8, 6 + 4 * 8, 6 + 5 * 8,
81 6 + 6 * 8, 6 + 7 * 8, 7 + 2 * 8, 7 + 3 * 8,
82 7 + 4 * 8, 7 + 5 * 8, 7 + 6 * 8, 7 + 7 * 8,
85 static const uint8_t field_scan8x8_cavlc[64] = {
86 0 + 0 * 8, 1 + 1 * 8, 2 + 0 * 8, 0 + 7 * 8,
87 2 + 2 * 8, 2 + 3 * 8, 2 + 4 * 8, 3 + 3 * 8,
88 3 + 4 * 8, 4 + 3 * 8, 4 + 4 * 8, 5 + 3 * 8,
89 5 + 5 * 8, 7 + 0 * 8, 6 + 6 * 8, 7 + 4 * 8,
90 0 + 1 * 8, 0 + 3 * 8, 1 + 3 * 8, 1 + 4 * 8,
91 1 + 5 * 8, 3 + 1 * 8, 2 + 5 * 8, 4 + 1 * 8,
92 3 + 5 * 8, 5 + 1 * 8, 4 + 5 * 8, 6 + 1 * 8,
93 5 + 6 * 8, 7 + 1 * 8, 6 + 7 * 8, 7 + 5 * 8,
94 0 + 2 * 8, 0 + 4 * 8, 0 + 5 * 8, 2 + 1 * 8,
95 1 + 6 * 8, 4 + 0 * 8, 2 + 6 * 8, 5 + 0 * 8,
96 3 + 6 * 8, 6 + 0 * 8, 4 + 6 * 8, 6 + 2 * 8,
97 5 + 7 * 8, 6 + 4 * 8, 7 + 2 * 8, 7 + 6 * 8,
98 1 + 0 * 8, 1 + 2 * 8, 0 + 6 * 8, 3 + 0 * 8,
99 1 + 7 * 8, 3 + 2 * 8, 2 + 7 * 8, 4 + 2 * 8,
100 3 + 7 * 8, 5 + 2 * 8, 4 + 7 * 8, 5 + 4 * 8,
101 6 + 3 * 8, 6 + 5 * 8, 7 + 3 * 8, 7 + 7 * 8,
104 // zigzag_scan8x8_cavlc[i] = zigzag_scan8x8[(i/4) + 16*(i%4)]
105 static const uint8_t zigzag_scan8x8_cavlc[64] = {
106 0 + 0 * 8, 1 + 1 * 8, 1 + 2 * 8, 2 + 2 * 8,
107 4 + 1 * 8, 0 + 5 * 8, 3 + 3 * 8, 7 + 0 * 8,
108 3 + 4 * 8, 1 + 7 * 8, 5 + 3 * 8, 6 + 3 * 8,
109 2 + 7 * 8, 6 + 4 * 8, 5 + 6 * 8, 7 + 5 * 8,
110 1 + 0 * 8, 2 + 0 * 8, 0 + 3 * 8, 3 + 1 * 8,
111 3 + 2 * 8, 0 + 6 * 8, 4 + 2 * 8, 6 + 1 * 8,
112 2 + 5 * 8, 2 + 6 * 8, 6 + 2 * 8, 5 + 4 * 8,
113 3 + 7 * 8, 7 + 3 * 8, 4 + 7 * 8, 7 + 6 * 8,
114 0 + 1 * 8, 3 + 0 * 8, 0 + 4 * 8, 4 + 0 * 8,
115 2 + 3 * 8, 1 + 5 * 8, 5 + 1 * 8, 5 + 2 * 8,
116 1 + 6 * 8, 3 + 5 * 8, 7 + 1 * 8, 4 + 5 * 8,
117 4 + 6 * 8, 7 + 4 * 8, 5 + 7 * 8, 6 + 7 * 8,
118 0 + 2 * 8, 2 + 1 * 8, 1 + 3 * 8, 5 + 0 * 8,
119 1 + 4 * 8, 2 + 4 * 8, 6 + 0 * 8, 4 + 3 * 8,
120 0 + 7 * 8, 4 + 4 * 8, 7 + 2 * 8, 3 + 6 * 8,
121 5 + 5 * 8, 6 + 5 * 8, 6 + 6 * 8, 7 + 7 * 8,
124 static const uint8_t dequant4_coeff_init[6][3] = {
133 static const uint8_t dequant8_coeff_init_scan[16] = {
134 0, 3, 4, 3, 3, 1, 5, 1, 4, 5, 2, 5, 3, 1, 5, 1
137 static const uint8_t dequant8_coeff_init[6][6] = {
138 { 20, 18, 32, 19, 25, 24 },
139 { 22, 19, 35, 21, 28, 26 },
140 { 26, 23, 42, 24, 33, 31 },
141 { 28, 25, 45, 26, 35, 33 },
142 { 32, 28, 51, 30, 40, 38 },
143 { 36, 32, 58, 34, 46, 43 },
147 static void release_unused_pictures(H264Context *h, int remove_current)
151 /* release non reference frames */
152 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
153 if (h->DPB[i].f->buf[0] && !h->DPB[i].reference &&
154 (remove_current || &h->DPB[i] != h->cur_pic_ptr)) {
155 ff_h264_unref_picture(h, &h->DPB[i]);
160 static int alloc_scratch_buffers(H264SliceContext *sl, int linesize)
162 const H264Context *h = sl->h264;
163 int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
165 av_fast_malloc(&sl->bipred_scratchpad, &sl->bipred_scratchpad_allocated, 16 * 6 * alloc_size);
166 // edge emu needs blocksize + filter length - 1
167 // (= 21x21 for h264)
168 av_fast_malloc(&sl->edge_emu_buffer, &sl->edge_emu_buffer_allocated, alloc_size * 2 * 21);
170 av_fast_malloc(&sl->top_borders[0], &sl->top_borders_allocated[0],
171 h->mb_width * 16 * 3 * sizeof(uint8_t) * 2);
172 av_fast_malloc(&sl->top_borders[1], &sl->top_borders_allocated[1],
173 h->mb_width * 16 * 3 * sizeof(uint8_t) * 2);
175 if (!sl->bipred_scratchpad || !sl->edge_emu_buffer ||
176 !sl->top_borders[0] || !sl->top_borders[1]) {
177 av_freep(&sl->bipred_scratchpad);
178 av_freep(&sl->edge_emu_buffer);
179 av_freep(&sl->top_borders[0]);
180 av_freep(&sl->top_borders[1]);
182 sl->bipred_scratchpad_allocated = 0;
183 sl->edge_emu_buffer_allocated = 0;
184 sl->top_borders_allocated[0] = 0;
185 sl->top_borders_allocated[1] = 0;
186 return AVERROR(ENOMEM);
192 static int init_table_pools(H264Context *h)
194 const int big_mb_num = h->mb_stride * (h->mb_height + 1) + 1;
195 const int mb_array_size = h->mb_stride * h->mb_height;
196 const int b4_stride = h->mb_width * 4 + 1;
197 const int b4_array_size = b4_stride * h->mb_height * 4;
199 h->qscale_table_pool = av_buffer_pool_init(big_mb_num + h->mb_stride,
201 h->mb_type_pool = av_buffer_pool_init((big_mb_num + h->mb_stride) *
202 sizeof(uint32_t), av_buffer_allocz);
203 h->motion_val_pool = av_buffer_pool_init(2 * (b4_array_size + 4) *
204 sizeof(int16_t), av_buffer_allocz);
205 h->ref_index_pool = av_buffer_pool_init(4 * mb_array_size, av_buffer_allocz);
207 if (!h->qscale_table_pool || !h->mb_type_pool || !h->motion_val_pool ||
208 !h->ref_index_pool) {
209 av_buffer_pool_uninit(&h->qscale_table_pool);
210 av_buffer_pool_uninit(&h->mb_type_pool);
211 av_buffer_pool_uninit(&h->motion_val_pool);
212 av_buffer_pool_uninit(&h->ref_index_pool);
213 return AVERROR(ENOMEM);
219 static int alloc_picture(H264Context *h, H264Picture *pic)
223 av_assert0(!pic->f->data[0]);
226 ret = ff_thread_get_buffer(h->avctx, &pic->tf, pic->reference ?
227 AV_GET_BUFFER_FLAG_REF : 0);
231 if (h->avctx->hwaccel) {
232 const AVHWAccel *hwaccel = h->avctx->hwaccel;
233 av_assert0(!pic->hwaccel_picture_private);
234 if (hwaccel->frame_priv_data_size) {
235 pic->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
236 if (!pic->hwaccel_priv_buf)
237 return AVERROR(ENOMEM);
238 pic->hwaccel_picture_private = pic->hwaccel_priv_buf->data;
242 if (!h->qscale_table_pool) {
243 ret = init_table_pools(h);
248 pic->qscale_table_buf = av_buffer_pool_get(h->qscale_table_pool);
249 pic->mb_type_buf = av_buffer_pool_get(h->mb_type_pool);
250 if (!pic->qscale_table_buf || !pic->mb_type_buf)
253 pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * h->mb_stride + 1;
254 pic->qscale_table = pic->qscale_table_buf->data + 2 * h->mb_stride + 1;
256 for (i = 0; i < 2; i++) {
257 pic->motion_val_buf[i] = av_buffer_pool_get(h->motion_val_pool);
258 pic->ref_index_buf[i] = av_buffer_pool_get(h->ref_index_pool);
259 if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
262 pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
263 pic->ref_index[i] = pic->ref_index_buf[i]->data;
268 ff_h264_unref_picture(h, pic);
269 return (ret < 0) ? ret : AVERROR(ENOMEM);
272 static inline int pic_is_unused(H264Context *h, H264Picture *pic)
279 static int find_unused_picture(H264Context *h)
283 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
284 if (pic_is_unused(h, &h->DPB[i]))
287 if (i == H264_MAX_PICTURE_COUNT)
288 return AVERROR_INVALIDDATA;
294 static void init_dequant8_coeff_table(H264Context *h)
297 const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
299 for (i = 0; i < 6; i++) {
300 h->dequant8_coeff[i] = h->dequant8_buffer[i];
301 for (j = 0; j < i; j++)
302 if (!memcmp(h->pps.scaling_matrix8[j], h->pps.scaling_matrix8[i],
303 64 * sizeof(uint8_t))) {
304 h->dequant8_coeff[i] = h->dequant8_buffer[j];
310 for (q = 0; q < max_qp + 1; q++) {
313 for (x = 0; x < 64; x++)
314 h->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
315 ((uint32_t)dequant8_coeff_init[idx][dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
316 h->pps.scaling_matrix8[i][x]) << shift;
321 static void init_dequant4_coeff_table(H264Context *h)
324 const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
325 for (i = 0; i < 6; i++) {
326 h->dequant4_coeff[i] = h->dequant4_buffer[i];
327 for (j = 0; j < i; j++)
328 if (!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i],
329 16 * sizeof(uint8_t))) {
330 h->dequant4_coeff[i] = h->dequant4_buffer[j];
336 for (q = 0; q < max_qp + 1; q++) {
337 int shift = div6[q] + 2;
339 for (x = 0; x < 16; x++)
340 h->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
341 ((uint32_t)dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
342 h->pps.scaling_matrix4[i][x]) << shift;
347 void h264_init_dequant_tables(H264Context *h)
350 init_dequant4_coeff_table(h);
351 if (h->pps.transform_8x8_mode)
352 init_dequant8_coeff_table(h);
353 if (h->sps.transform_bypass) {
354 for (i = 0; i < 6; i++)
355 for (x = 0; x < 16; x++)
356 h->dequant4_coeff[i][0][x] = 1 << 6;
357 if (h->pps.transform_8x8_mode)
358 for (i = 0; i < 6; i++)
359 for (x = 0; x < 64; x++)
360 h->dequant8_coeff[i][0][x] = 1 << 6;
364 #define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b) + (size))))
366 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
367 ((pic && pic >= old_ctx->DPB && \
368 pic < old_ctx->DPB + H264_MAX_PICTURE_COUNT) ? \
369 &new_ctx->DPB[pic - old_ctx->DPB] : NULL)
371 static void copy_picture_range(H264Picture **to, H264Picture **from, int count,
372 H264Context *new_base,
373 H264Context *old_base)
377 for (i = 0; i < count; i++) {
378 assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
379 IN_RANGE(from[i], old_base->DPB,
380 sizeof(H264Picture) * H264_MAX_PICTURE_COUNT) ||
382 to[i] = REBASE_PICTURE(from[i], new_base, old_base);
386 static int copy_parameter_set(void **to, void **from, int count, int size)
390 for (i = 0; i < count; i++) {
391 if (to[i] && !from[i]) {
393 } else if (from[i] && !to[i]) {
394 to[i] = av_malloc(size);
396 return AVERROR(ENOMEM);
400 memcpy(to[i], from[i], size);
406 #define copy_fields(to, from, start_field, end_field) \
407 memcpy(&to->start_field, &from->start_field, \
408 (char *)&to->end_field - (char *)&to->start_field)
410 static int h264_slice_header_init(H264Context *h);
412 int ff_h264_update_thread_context(AVCodecContext *dst,
413 const AVCodecContext *src)
415 H264Context *h = dst->priv_data, *h1 = src->priv_data;
416 int inited = h->context_initialized, err = 0;
420 if (dst == src || !h1->context_initialized)
424 (h->width != h1->width ||
425 h->height != h1->height ||
426 h->mb_width != h1->mb_width ||
427 h->mb_height != h1->mb_height ||
428 h->sps.bit_depth_luma != h1->sps.bit_depth_luma ||
429 h->sps.chroma_format_idc != h1->sps.chroma_format_idc ||
430 h->sps.colorspace != h1->sps.colorspace)) {
435 if ((ret = copy_parameter_set((void **)h->sps_buffers,
436 (void **)h1->sps_buffers,
437 MAX_SPS_COUNT, sizeof(SPS))) < 0)
440 if ((ret = copy_parameter_set((void **)h->pps_buffers,
441 (void **)h1->pps_buffers,
442 MAX_PPS_COUNT, sizeof(PPS))) < 0)
446 if (need_reinit || !inited) {
447 h->width = h1->width;
448 h->height = h1->height;
449 h->mb_height = h1->mb_height;
450 h->mb_width = h1->mb_width;
451 h->mb_num = h1->mb_num;
452 h->mb_stride = h1->mb_stride;
453 h->b_stride = h1->b_stride;
455 if ((err = h264_slice_header_init(h)) < 0) {
456 av_log(h->avctx, AV_LOG_ERROR, "h264_slice_header_init() failed");
460 /* copy block_offset since frame_start may not be called */
461 memcpy(h->block_offset, h1->block_offset, sizeof(h->block_offset));
464 h->avctx->coded_height = h1->avctx->coded_height;
465 h->avctx->coded_width = h1->avctx->coded_width;
466 h->avctx->width = h1->avctx->width;
467 h->avctx->height = h1->avctx->height;
468 h->coded_picture_number = h1->coded_picture_number;
469 h->first_field = h1->first_field;
470 h->picture_structure = h1->picture_structure;
471 h->droppable = h1->droppable;
472 h->low_delay = h1->low_delay;
474 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
475 ff_h264_unref_picture(h, &h->DPB[i]);
476 if (h1->DPB[i].f->buf[0] &&
477 (ret = ff_h264_ref_picture(h, &h->DPB[i], &h1->DPB[i])) < 0)
481 h->cur_pic_ptr = REBASE_PICTURE(h1->cur_pic_ptr, h, h1);
482 ff_h264_unref_picture(h, &h->cur_pic);
483 if (h1->cur_pic.f->buf[0]) {
484 ret = ff_h264_ref_picture(h, &h->cur_pic, &h1->cur_pic);
489 h->enable_er = h1->enable_er;
490 h->workaround_bugs = h1->workaround_bugs;
491 h->low_delay = h1->low_delay;
492 h->droppable = h1->droppable;
494 // extradata/NAL handling
495 h->is_avc = h1->is_avc;
496 h->nal_length_size = h1->nal_length_size;
498 // Dequantization matrices
499 // FIXME these are big - can they be only copied when PPS changes?
500 copy_fields(h, h1, dequant4_buffer, dequant4_coeff);
502 for (i = 0; i < 6; i++)
503 h->dequant4_coeff[i] = h->dequant4_buffer[0] +
504 (h1->dequant4_coeff[i] - h1->dequant4_buffer[0]);
506 for (i = 0; i < 6; i++)
507 h->dequant8_coeff[i] = h->dequant8_buffer[0] +
508 (h1->dequant8_coeff[i] - h1->dequant8_buffer[0]);
510 h->dequant_coeff_pps = h1->dequant_coeff_pps;
513 copy_fields(h, h1, poc_lsb, current_slice);
515 copy_picture_range(h->short_ref, h1->short_ref, 32, h, h1);
516 copy_picture_range(h->long_ref, h1->long_ref, 32, h, h1);
517 copy_picture_range(h->delayed_pic, h1->delayed_pic,
518 MAX_DELAYED_PIC_COUNT + 2, h, h1);
524 err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
525 h->prev_poc_msb = h->poc_msb;
526 h->prev_poc_lsb = h->poc_lsb;
528 h->prev_frame_num_offset = h->frame_num_offset;
529 h->prev_frame_num = h->frame_num;
531 h->recovery_frame = h1->recovery_frame;
532 h->frame_recovered = h1->frame_recovered;
537 static int h264_frame_start(H264Context *h)
541 const int pixel_shift = h->pixel_shift;
543 release_unused_pictures(h, 1);
544 h->cur_pic_ptr = NULL;
546 i = find_unused_picture(h);
548 av_log(h->avctx, AV_LOG_ERROR, "no frame buffer available\n");
553 pic->reference = h->droppable ? 0 : h->picture_structure;
554 pic->f->coded_picture_number = h->coded_picture_number++;
555 pic->field_picture = h->picture_structure != PICT_FRAME;
556 pic->frame_num = h->frame_num;
558 * Zero key_frame here; IDR markings per slice in frame or fields are ORed
560 * See decode_nal_units().
562 pic->f->key_frame = 0;
566 if ((ret = alloc_picture(h, pic)) < 0)
569 h->cur_pic_ptr = pic;
570 ff_h264_unref_picture(h, &h->cur_pic);
571 if ((ret = ff_h264_ref_picture(h, &h->cur_pic, h->cur_pic_ptr)) < 0)
574 if (CONFIG_ERROR_RESILIENCE && h->enable_er)
575 ff_er_frame_start(&h->slice_ctx[0].er);
577 for (i = 0; i < 16; i++) {
578 h->block_offset[i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);
579 h->block_offset[48 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);
581 for (i = 0; i < 16; i++) {
582 h->block_offset[16 + i] =
583 h->block_offset[32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);
584 h->block_offset[48 + 16 + i] =
585 h->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);
588 /* Some macroblocks can be accessed before they're available in case
589 * of lost slices, MBAFF or threading. */
590 memset(h->slice_table, -1,
591 (h->mb_height * h->mb_stride - 1) * sizeof(*h->slice_table));
593 /* We mark the current picture as non-reference after allocating it, so
594 * that if we break out due to an error it can be released automatically
595 * in the next ff_mpv_frame_start().
597 h->cur_pic_ptr->reference = 0;
599 h->cur_pic_ptr->field_poc[0] = h->cur_pic_ptr->field_poc[1] = INT_MAX;
601 h->next_output_pic = NULL;
603 assert(h->cur_pic_ptr->long_ref == 0);
608 static av_always_inline void backup_mb_border(const H264Context *h, H264SliceContext *sl,
610 uint8_t *src_cb, uint8_t *src_cr,
611 int linesize, int uvlinesize,
616 const int pixel_shift = h->pixel_shift;
617 int chroma444 = CHROMA444(h);
618 int chroma422 = CHROMA422(h);
621 src_cb -= uvlinesize;
622 src_cr -= uvlinesize;
624 if (!simple && FRAME_MBAFF(h)) {
627 top_border = sl->top_borders[0][sl->mb_x];
628 AV_COPY128(top_border, src_y + 15 * linesize);
630 AV_COPY128(top_border + 16, src_y + 15 * linesize + 16);
631 if (simple || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
634 AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
635 AV_COPY128(top_border + 48, src_cb + 15 * uvlinesize + 16);
636 AV_COPY128(top_border + 64, src_cr + 15 * uvlinesize);
637 AV_COPY128(top_border + 80, src_cr + 15 * uvlinesize + 16);
639 AV_COPY128(top_border + 16, src_cb + 15 * uvlinesize);
640 AV_COPY128(top_border + 32, src_cr + 15 * uvlinesize);
642 } else if (chroma422) {
644 AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
645 AV_COPY128(top_border + 48, src_cr + 15 * uvlinesize);
647 AV_COPY64(top_border + 16, src_cb + 15 * uvlinesize);
648 AV_COPY64(top_border + 24, src_cr + 15 * uvlinesize);
652 AV_COPY128(top_border + 32, src_cb + 7 * uvlinesize);
653 AV_COPY128(top_border + 48, src_cr + 7 * uvlinesize);
655 AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize);
656 AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize);
661 } else if (MB_MBAFF(sl)) {
667 top_border = sl->top_borders[top_idx][sl->mb_x];
668 /* There are two lines saved, the line above the top macroblock
669 * of a pair, and the line above the bottom macroblock. */
670 AV_COPY128(top_border, src_y + 16 * linesize);
672 AV_COPY128(top_border + 16, src_y + 16 * linesize + 16);
674 if (simple || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
677 AV_COPY128(top_border + 32, src_cb + 16 * linesize);
678 AV_COPY128(top_border + 48, src_cb + 16 * linesize + 16);
679 AV_COPY128(top_border + 64, src_cr + 16 * linesize);
680 AV_COPY128(top_border + 80, src_cr + 16 * linesize + 16);
682 AV_COPY128(top_border + 16, src_cb + 16 * linesize);
683 AV_COPY128(top_border + 32, src_cr + 16 * linesize);
685 } else if (chroma422) {
687 AV_COPY128(top_border + 32, src_cb + 16 * uvlinesize);
688 AV_COPY128(top_border + 48, src_cr + 16 * uvlinesize);
690 AV_COPY64(top_border + 16, src_cb + 16 * uvlinesize);
691 AV_COPY64(top_border + 24, src_cr + 16 * uvlinesize);
695 AV_COPY128(top_border + 32, src_cb + 8 * uvlinesize);
696 AV_COPY128(top_border + 48, src_cr + 8 * uvlinesize);
698 AV_COPY64(top_border + 16, src_cb + 8 * uvlinesize);
699 AV_COPY64(top_border + 24, src_cr + 8 * uvlinesize);
706 * Initialize implicit_weight table.
707 * @param field 0/1 initialize the weight for interlaced MBAFF
708 * -1 initializes the rest
710 static void implicit_weight_table(const H264Context *h, H264SliceContext *sl, int field)
712 int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
714 for (i = 0; i < 2; i++) {
715 sl->luma_weight_flag[i] = 0;
716 sl->chroma_weight_flag[i] = 0;
720 if (h->picture_structure == PICT_FRAME) {
721 cur_poc = h->cur_pic_ptr->poc;
723 cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1];
725 if (sl->ref_count[0] == 1 && sl->ref_count[1] == 1 && !FRAME_MBAFF(h) &&
726 sl->ref_list[0][0].poc + sl->ref_list[1][0].poc == 2 * cur_poc) {
728 sl->use_weight_chroma = 0;
732 ref_count0 = sl->ref_count[0];
733 ref_count1 = sl->ref_count[1];
735 cur_poc = h->cur_pic_ptr->field_poc[field];
737 ref_count0 = 16 + 2 * sl->ref_count[0];
738 ref_count1 = 16 + 2 * sl->ref_count[1];
742 sl->use_weight_chroma = 2;
743 sl->luma_log2_weight_denom = 5;
744 sl->chroma_log2_weight_denom = 5;
746 for (ref0 = ref_start; ref0 < ref_count0; ref0++) {
747 int poc0 = sl->ref_list[0][ref0].poc;
748 for (ref1 = ref_start; ref1 < ref_count1; ref1++) {
750 if (!sl->ref_list[0][ref0].parent->long_ref && !sl->ref_list[1][ref1].parent->long_ref) {
751 int poc1 = sl->ref_list[1][ref1].poc;
752 int td = av_clip_int8(poc1 - poc0);
754 int tb = av_clip_int8(cur_poc - poc0);
755 int tx = (16384 + (FFABS(td) >> 1)) / td;
756 int dist_scale_factor = (tb * tx + 32) >> 8;
757 if (dist_scale_factor >= -64 && dist_scale_factor <= 128)
758 w = 64 - dist_scale_factor;
762 sl->implicit_weight[ref0][ref1][0] =
763 sl->implicit_weight[ref0][ref1][1] = w;
765 sl->implicit_weight[ref0][ref1][field] = w;
772 * initialize scan tables
774 static void init_scan_tables(H264Context *h)
777 for (i = 0; i < 16; i++) {
778 #define TRANSPOSE(x) (x >> 2) | ((x << 2) & 0xF)
779 h->zigzag_scan[i] = TRANSPOSE(zigzag_scan[i]);
780 h->field_scan[i] = TRANSPOSE(field_scan[i]);
783 for (i = 0; i < 64; i++) {
784 #define TRANSPOSE(x) (x >> 3) | ((x & 7) << 3)
785 h->zigzag_scan8x8[i] = TRANSPOSE(ff_zigzag_direct[i]);
786 h->zigzag_scan8x8_cavlc[i] = TRANSPOSE(zigzag_scan8x8_cavlc[i]);
787 h->field_scan8x8[i] = TRANSPOSE(field_scan8x8[i]);
788 h->field_scan8x8_cavlc[i] = TRANSPOSE(field_scan8x8_cavlc[i]);
791 if (h->sps.transform_bypass) { // FIXME same ugly
792 h->zigzag_scan_q0 = zigzag_scan;
793 h->zigzag_scan8x8_q0 = ff_zigzag_direct;
794 h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
795 h->field_scan_q0 = field_scan;
796 h->field_scan8x8_q0 = field_scan8x8;
797 h->field_scan8x8_cavlc_q0 = field_scan8x8_cavlc;
799 h->zigzag_scan_q0 = h->zigzag_scan;
800 h->zigzag_scan8x8_q0 = h->zigzag_scan8x8;
801 h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
802 h->field_scan_q0 = h->field_scan;
803 h->field_scan8x8_q0 = h->field_scan8x8;
804 h->field_scan8x8_cavlc_q0 = h->field_scan8x8_cavlc;
808 static enum AVPixelFormat get_pixel_format(H264Context *h)
810 #define HWACCEL_MAX (CONFIG_H264_DXVA2_HWACCEL + \
811 CONFIG_H264_D3D11VA_HWACCEL + \
812 CONFIG_H264_VAAPI_HWACCEL + \
813 (CONFIG_H264_VDA_HWACCEL * 2) + \
814 CONFIG_H264_VDPAU_HWACCEL)
815 enum AVPixelFormat pix_fmts[HWACCEL_MAX + 2], *fmt = pix_fmts;
816 const enum AVPixelFormat *choices = pix_fmts;
818 switch (h->sps.bit_depth_luma) {
821 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
822 *fmt++ = AV_PIX_FMT_GBRP9;
824 *fmt++ = AV_PIX_FMT_YUV444P9;
825 } else if (CHROMA422(h))
826 *fmt++ = AV_PIX_FMT_YUV422P9;
828 *fmt++ = AV_PIX_FMT_YUV420P9;
832 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
833 *fmt++ = AV_PIX_FMT_GBRP10;
835 *fmt++ = AV_PIX_FMT_YUV444P10;
836 } else if (CHROMA422(h))
837 *fmt++ = AV_PIX_FMT_YUV422P10;
839 *fmt++ = AV_PIX_FMT_YUV420P10;
842 #if CONFIG_H264_VDPAU_HWACCEL
843 *fmt++ = AV_PIX_FMT_VDPAU;
846 if (h->avctx->colorspace == AVCOL_SPC_RGB)
847 *fmt++ = AV_PIX_FMT_GBRP;
848 else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
849 *fmt++ = AV_PIX_FMT_YUVJ444P;
851 *fmt++ = AV_PIX_FMT_YUV444P;
852 } else if (CHROMA422(h)) {
853 if (h->avctx->color_range == AVCOL_RANGE_JPEG)
854 *fmt++ = AV_PIX_FMT_YUVJ422P;
856 *fmt++ = AV_PIX_FMT_YUV422P;
858 #if CONFIG_H264_DXVA2_HWACCEL
859 *fmt++ = AV_PIX_FMT_DXVA2_VLD;
861 #if CONFIG_H264_D3D11VA_HWACCEL
862 *fmt++ = AV_PIX_FMT_D3D11VA_VLD;
864 #if CONFIG_H264_VAAPI_HWACCEL
865 *fmt++ = AV_PIX_FMT_VAAPI_VLD;
867 #if CONFIG_H264_VDA_HWACCEL
868 *fmt++ = AV_PIX_FMT_VDA_VLD;
869 *fmt++ = AV_PIX_FMT_VDA;
871 if (h->avctx->codec->pix_fmts)
872 choices = h->avctx->codec->pix_fmts;
873 else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
874 *fmt++ = AV_PIX_FMT_YUVJ420P;
876 *fmt++ = AV_PIX_FMT_YUV420P;
880 av_log(h->avctx, AV_LOG_ERROR,
881 "Unsupported bit depth %d\n", h->sps.bit_depth_luma);
882 return AVERROR_INVALIDDATA;
885 *fmt = AV_PIX_FMT_NONE;
887 return ff_get_format(h->avctx, choices);
890 /* export coded and cropped frame dimensions to AVCodecContext */
891 static int init_dimensions(H264Context *h)
893 int width = h->width - (h->sps.crop_right + h->sps.crop_left);
894 int height = h->height - (h->sps.crop_top + h->sps.crop_bottom);
896 /* handle container cropping */
897 if (FFALIGN(h->avctx->width, 16) == FFALIGN(width, 16) &&
898 FFALIGN(h->avctx->height, 16) == FFALIGN(height, 16)) {
899 width = h->avctx->width;
900 height = h->avctx->height;
903 if (width <= 0 || height <= 0) {
904 av_log(h->avctx, AV_LOG_ERROR, "Invalid cropped dimensions: %dx%d.\n",
906 if (h->avctx->err_recognition & AV_EF_EXPLODE)
907 return AVERROR_INVALIDDATA;
909 av_log(h->avctx, AV_LOG_WARNING, "Ignoring cropping information.\n");
920 h->avctx->coded_width = h->width;
921 h->avctx->coded_height = h->height;
922 h->avctx->width = width;
923 h->avctx->height = height;
928 static int h264_slice_header_init(H264Context *h)
930 int nb_slices = (HAVE_THREADS &&
931 h->avctx->active_thread_type & FF_THREAD_SLICE) ?
932 h->avctx->thread_count : 1;
935 ff_set_sar(h->avctx, h->sps.sar);
936 av_pix_fmt_get_chroma_sub_sample(h->avctx->pix_fmt,
937 &h->chroma_x_shift, &h->chroma_y_shift);
939 if (h->sps.timing_info_present_flag) {
940 int64_t den = h->sps.time_scale;
941 if (h->x264_build < 44U)
943 av_reduce(&h->avctx->framerate.den, &h->avctx->framerate.num,
944 h->sps.num_units_in_tick, den, 1 << 30);
947 ff_h264_free_tables(h);
950 h->prev_interlaced_frame = 1;
953 ret = ff_h264_alloc_tables(h);
955 av_log(h->avctx, AV_LOG_ERROR, "Could not allocate memory\n");
959 if (h->sps.bit_depth_luma < 8 || h->sps.bit_depth_luma > 10) {
960 av_log(h->avctx, AV_LOG_ERROR, "Unsupported bit depth %d\n",
961 h->sps.bit_depth_luma);
962 return AVERROR_INVALIDDATA;
965 h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
966 h->pixel_shift = h->sps.bit_depth_luma > 8;
967 h->chroma_format_idc = h->sps.chroma_format_idc;
968 h->bit_depth_luma = h->sps.bit_depth_luma;
970 ff_h264dsp_init(&h->h264dsp, h->sps.bit_depth_luma,
971 h->sps.chroma_format_idc);
972 ff_h264chroma_init(&h->h264chroma, h->sps.bit_depth_chroma);
973 ff_h264qpel_init(&h->h264qpel, h->sps.bit_depth_luma);
974 ff_h264_pred_init(&h->hpc, h->avctx->codec_id, h->sps.bit_depth_luma,
975 h->sps.chroma_format_idc);
976 ff_videodsp_init(&h->vdsp, h->sps.bit_depth_luma);
978 if (nb_slices > H264_MAX_THREADS || (nb_slices > h->mb_height && h->mb_height)) {
981 max_slices = FFMIN(H264_MAX_THREADS, h->mb_height);
983 max_slices = H264_MAX_THREADS;
984 av_log(h->avctx, AV_LOG_WARNING, "too many threads/slices %d,"
985 " reducing to %d\n", nb_slices, max_slices);
986 nb_slices = max_slices;
988 h->slice_context_count = nb_slices;
990 if (!HAVE_THREADS || !(h->avctx->active_thread_type & FF_THREAD_SLICE)) {
991 ret = ff_h264_slice_context_init(h, &h->slice_ctx[0]);
993 av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
997 for (i = 0; i < h->slice_context_count; i++) {
998 H264SliceContext *sl = &h->slice_ctx[i];
1001 sl->intra4x4_pred_mode = h->intra4x4_pred_mode + i * 8 * 2 * h->mb_stride;
1002 sl->mvd_table[0] = h->mvd_table[0] + i * 8 * 2 * h->mb_stride;
1003 sl->mvd_table[1] = h->mvd_table[1] + i * 8 * 2 * h->mb_stride;
1005 if ((ret = ff_h264_slice_context_init(h, sl)) < 0) {
1006 av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
1012 h->context_initialized = 1;
1018 * Decode a slice header.
1019 * This will (re)intialize the decoder and call h264_frame_start() as needed.
1021 * @param h h264context
1023 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1025 int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl)
1027 unsigned int first_mb_in_slice;
1028 unsigned int pps_id;
1030 unsigned int slice_type, tmp, i, j;
1031 int last_pic_structure, last_pic_droppable;
1032 int needs_reinit = 0;
1033 int field_pic_flag, bottom_field_flag;
1034 int frame_num, droppable, picture_structure;
1035 int mb_aff_frame = 0;
1037 h->qpel_put = h->h264qpel.put_h264_qpel_pixels_tab;
1038 h->qpel_avg = h->h264qpel.avg_h264_qpel_pixels_tab;
1040 first_mb_in_slice = get_ue_golomb(&sl->gb);
1042 if (first_mb_in_slice == 0) { // FIXME better field boundary detection
1043 if (h->current_slice && h->cur_pic_ptr && FIELD_PICTURE(h)) {
1044 ff_h264_field_end(h, sl, 1);
1047 h->current_slice = 0;
1048 if (!h->first_field) {
1049 if (h->cur_pic_ptr && !h->droppable) {
1050 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1051 h->picture_structure == PICT_BOTTOM_FIELD);
1053 h->cur_pic_ptr = NULL;
1057 slice_type = get_ue_golomb_31(&sl->gb);
1058 if (slice_type > 9) {
1059 av_log(h->avctx, AV_LOG_ERROR,
1060 "slice type %d too large at %d\n",
1061 slice_type, first_mb_in_slice);
1062 return AVERROR_INVALIDDATA;
1064 if (slice_type > 4) {
1066 sl->slice_type_fixed = 1;
1068 sl->slice_type_fixed = 0;
1070 slice_type = golomb_to_pict_type[slice_type];
1071 sl->slice_type = slice_type;
1072 sl->slice_type_nos = slice_type & 3;
1074 if (h->nal_unit_type == NAL_IDR_SLICE &&
1075 sl->slice_type_nos != AV_PICTURE_TYPE_I) {
1076 av_log(h->avctx, AV_LOG_ERROR, "A non-intra slice in an IDR NAL unit.\n");
1077 return AVERROR_INVALIDDATA;
1080 // to make a few old functions happy, it's wrong though
1081 if (!h->setup_finished)
1082 h->pict_type = sl->slice_type;
1084 pps_id = get_ue_golomb(&sl->gb);
1085 if (pps_id >= MAX_PPS_COUNT) {
1086 av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
1087 return AVERROR_INVALIDDATA;
1089 if (!h->pps_buffers[pps_id]) {
1090 av_log(h->avctx, AV_LOG_ERROR,
1091 "non-existing PPS %u referenced\n",
1093 return AVERROR_INVALIDDATA;
1095 if (!h->setup_finished) {
1096 h->pps = *h->pps_buffers[pps_id];
1097 } else if (h->dequant_coeff_pps != pps_id) {
1098 av_log(h->avctx, AV_LOG_ERROR, "PPS changed between slices\n");
1099 return AVERROR_INVALIDDATA;
1102 if (!h->sps_buffers[h->pps.sps_id]) {
1103 av_log(h->avctx, AV_LOG_ERROR,
1104 "non-existing SPS %u referenced\n",
1106 return AVERROR_INVALIDDATA;
1109 if (h->pps.sps_id != h->sps.sps_id ||
1110 h->sps_buffers[h->pps.sps_id]->new) {
1111 h->sps_buffers[h->pps.sps_id]->new = 0;
1113 h->sps = *h->sps_buffers[h->pps.sps_id];
1115 if (h->bit_depth_luma != h->sps.bit_depth_luma ||
1116 h->chroma_format_idc != h->sps.chroma_format_idc)
1119 if (h->flags & AV_CODEC_FLAG_LOW_DELAY ||
1120 (h->sps.bitstream_restriction_flag &&
1121 !h->sps.num_reorder_frames)) {
1122 if (h->avctx->has_b_frames > 1 || h->delayed_pic[0])
1123 av_log(h->avctx, AV_LOG_WARNING, "Delayed frames seen. "
1124 "Reenabling low delay requires a codec flush.\n");
1129 if (h->avctx->has_b_frames < 2)
1130 h->avctx->has_b_frames = !h->low_delay;
1134 if (!h->setup_finished) {
1135 h->avctx->profile = ff_h264_get_profile(&h->sps);
1136 h->avctx->level = h->sps.level_idc;
1137 h->avctx->refs = h->sps.ref_frame_count;
1139 if (h->mb_width != h->sps.mb_width ||
1140 h->mb_height != h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag))
1143 h->mb_width = h->sps.mb_width;
1144 h->mb_height = h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1145 h->mb_num = h->mb_width * h->mb_height;
1146 h->mb_stride = h->mb_width + 1;
1148 h->b_stride = h->mb_width * 4;
1150 h->chroma_y_shift = h->sps.chroma_format_idc <= 1; // 400 uses yuv420p
1152 h->width = 16 * h->mb_width;
1153 h->height = 16 * h->mb_height;
1155 ret = init_dimensions(h);
1159 if (h->sps.video_signal_type_present_flag) {
1160 h->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG
1162 if (h->sps.colour_description_present_flag) {
1163 if (h->avctx->colorspace != h->sps.colorspace)
1165 h->avctx->color_primaries = h->sps.color_primaries;
1166 h->avctx->color_trc = h->sps.color_trc;
1167 h->avctx->colorspace = h->sps.colorspace;
1172 if (h->context_initialized && needs_reinit) {
1173 h->context_initialized = 0;
1174 if (sl != h->slice_ctx) {
1175 av_log(h->avctx, AV_LOG_ERROR,
1176 "changing width %d -> %d / height %d -> %d on "
1178 h->width, h->avctx->coded_width,
1179 h->height, h->avctx->coded_height,
1180 h->current_slice + 1);
1181 return AVERROR_INVALIDDATA;
1184 ff_h264_flush_change(h);
1186 if ((ret = get_pixel_format(h)) < 0)
1188 h->avctx->pix_fmt = ret;
1190 av_log(h->avctx, AV_LOG_INFO, "Reinit context to %dx%d, "
1191 "pix_fmt: %d\n", h->width, h->height, h->avctx->pix_fmt);
1193 if ((ret = h264_slice_header_init(h)) < 0) {
1194 av_log(h->avctx, AV_LOG_ERROR,
1195 "h264_slice_header_init() failed\n");
1199 if (!h->context_initialized) {
1200 if (sl != h->slice_ctx) {
1201 av_log(h->avctx, AV_LOG_ERROR,
1202 "Cannot (re-)initialize context during parallel decoding.\n");
1203 return AVERROR_PATCHWELCOME;
1206 if ((ret = get_pixel_format(h)) < 0)
1208 h->avctx->pix_fmt = ret;
1210 if ((ret = h264_slice_header_init(h)) < 0) {
1211 av_log(h->avctx, AV_LOG_ERROR,
1212 "h264_slice_header_init() failed\n");
1217 if (sl == h->slice_ctx && h->dequant_coeff_pps != pps_id) {
1218 h->dequant_coeff_pps = pps_id;
1219 h264_init_dequant_tables(h);
1222 frame_num = get_bits(&sl->gb, h->sps.log2_max_frame_num);
1223 if (!h->setup_finished)
1224 h->frame_num = frame_num;
1228 last_pic_structure = h->picture_structure;
1229 last_pic_droppable = h->droppable;
1231 droppable = h->nal_ref_idc == 0;
1232 if (h->sps.frame_mbs_only_flag) {
1233 picture_structure = PICT_FRAME;
1235 field_pic_flag = get_bits1(&sl->gb);
1236 if (field_pic_flag) {
1237 bottom_field_flag = get_bits1(&sl->gb);
1238 picture_structure = PICT_TOP_FIELD + bottom_field_flag;
1240 picture_structure = PICT_FRAME;
1241 mb_aff_frame = h->sps.mb_aff;
1244 if (!h->setup_finished) {
1245 h->droppable = droppable;
1246 h->picture_structure = picture_structure;
1247 h->mb_aff_frame = mb_aff_frame;
1249 sl->mb_field_decoding_flag = h->picture_structure != PICT_FRAME;
1251 if (h->current_slice != 0) {
1252 if (last_pic_structure != picture_structure ||
1253 last_pic_droppable != droppable) {
1254 av_log(h->avctx, AV_LOG_ERROR,
1255 "Changing field mode (%d -> %d) between slices is not allowed\n",
1256 last_pic_structure, h->picture_structure);
1257 return AVERROR_INVALIDDATA;
1258 } else if (!h->cur_pic_ptr) {
1259 av_log(h->avctx, AV_LOG_ERROR,
1260 "unset cur_pic_ptr on slice %d\n",
1261 h->current_slice + 1);
1262 return AVERROR_INVALIDDATA;
1265 /* Shorten frame num gaps so we don't have to allocate reference
1266 * frames just to throw them away */
1267 if (h->frame_num != h->prev_frame_num) {
1268 int unwrap_prev_frame_num = h->prev_frame_num;
1269 int max_frame_num = 1 << h->sps.log2_max_frame_num;
1271 if (unwrap_prev_frame_num > h->frame_num)
1272 unwrap_prev_frame_num -= max_frame_num;
1274 if ((h->frame_num - unwrap_prev_frame_num) > h->sps.ref_frame_count) {
1275 unwrap_prev_frame_num = (h->frame_num - h->sps.ref_frame_count) - 1;
1276 if (unwrap_prev_frame_num < 0)
1277 unwrap_prev_frame_num += max_frame_num;
1279 h->prev_frame_num = unwrap_prev_frame_num;
1283 /* See if we have a decoded first field looking for a pair...
1284 * Here, we're using that to see if we should mark previously
1285 * decode frames as "finished".
1286 * We have to do that before the "dummy" in-between frame allocation,
1287 * since that can modify s->current_picture_ptr. */
1288 if (h->first_field) {
1289 assert(h->cur_pic_ptr);
1290 assert(h->cur_pic_ptr->f->buf[0]);
1291 assert(h->cur_pic_ptr->reference != DELAYED_PIC_REF);
1293 /* figure out if we have a complementary field pair */
1294 if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1295 /* Previous field is unmatched. Don't display it, but let it
1296 * remain for reference if marked as such. */
1297 if (!last_pic_droppable && last_pic_structure != PICT_FRAME) {
1298 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1299 last_pic_structure == PICT_TOP_FIELD);
1302 if (h->cur_pic_ptr->frame_num != h->frame_num) {
1303 /* This and previous field were reference, but had
1304 * different frame_nums. Consider this field first in
1305 * pair. Throw away previous field except for reference
1307 if (!last_pic_droppable && last_pic_structure != PICT_FRAME) {
1308 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1309 last_pic_structure == PICT_TOP_FIELD);
1312 /* Second field in complementary pair */
1313 if (!((last_pic_structure == PICT_TOP_FIELD &&
1314 h->picture_structure == PICT_BOTTOM_FIELD) ||
1315 (last_pic_structure == PICT_BOTTOM_FIELD &&
1316 h->picture_structure == PICT_TOP_FIELD))) {
1317 av_log(h->avctx, AV_LOG_ERROR,
1318 "Invalid field mode combination %d/%d\n",
1319 last_pic_structure, h->picture_structure);
1320 h->picture_structure = last_pic_structure;
1321 h->droppable = last_pic_droppable;
1322 return AVERROR_INVALIDDATA;
1323 } else if (last_pic_droppable != h->droppable) {
1324 avpriv_request_sample(h->avctx,
1325 "Found reference and non-reference fields in the same frame, which");
1326 h->picture_structure = last_pic_structure;
1327 h->droppable = last_pic_droppable;
1328 return AVERROR_PATCHWELCOME;
1334 while (h->frame_num != h->prev_frame_num &&
1335 h->frame_num != (h->prev_frame_num + 1) % (1 << h->sps.log2_max_frame_num)) {
1336 H264Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
1337 av_log(h->avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n",
1338 h->frame_num, h->prev_frame_num);
1339 ret = h264_frame_start(h);
1345 h->prev_frame_num++;
1346 h->prev_frame_num %= 1 << h->sps.log2_max_frame_num;
1347 h->cur_pic_ptr->frame_num = h->prev_frame_num;
1348 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 0);
1349 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 1);
1350 ret = ff_generate_sliding_window_mmcos(h, 1);
1351 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1353 ret = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1354 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1356 /* Error concealment: If a ref is missing, copy the previous ref
1358 * FIXME: Avoiding a memcpy would be nice, but ref handling makes
1359 * many assumptions about there being no actual duplicates.
1360 * FIXME: This does not copy padding for out-of-frame motion
1361 * vectors. Given we are concealing a lost frame, this probably
1362 * is not noticeable by comparison, but it should be fixed. */
1363 if (h->short_ref_count) {
1365 h->short_ref[0]->f->width == prev->f->width &&
1366 h->short_ref[0]->f->height == prev->f->height &&
1367 h->short_ref[0]->f->format == prev->f->format) {
1368 av_image_copy(h->short_ref[0]->f->data,
1369 h->short_ref[0]->f->linesize,
1370 (const uint8_t **)prev->f->data,
1375 h->short_ref[0]->poc = prev->poc + 2;
1377 h->short_ref[0]->frame_num = h->prev_frame_num;
1381 /* See if we have a decoded first field looking for a pair...
1382 * We're using that to see whether to continue decoding in that
1383 * frame, or to allocate a new one. */
1384 if (h->first_field) {
1385 assert(h->cur_pic_ptr);
1386 assert(h->cur_pic_ptr->f->buf[0]);
1387 assert(h->cur_pic_ptr->reference != DELAYED_PIC_REF);
1389 /* figure out if we have a complementary field pair */
1390 if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1391 /* Previous field is unmatched. Don't display it, but let it
1392 * remain for reference if marked as such. */
1393 h->cur_pic_ptr = NULL;
1394 h->first_field = FIELD_PICTURE(h);
1396 if (h->cur_pic_ptr->frame_num != h->frame_num) {
1397 /* This and the previous field had different frame_nums.
1398 * Consider this field first in pair. Throw away previous
1399 * one except for reference purposes. */
1401 h->cur_pic_ptr = NULL;
1403 /* Second field in complementary pair */
1408 /* Frame or first field in a potentially complementary pair */
1409 h->first_field = FIELD_PICTURE(h);
1412 if (!FIELD_PICTURE(h) || h->first_field) {
1413 if (h264_frame_start(h) < 0) {
1415 return AVERROR_INVALIDDATA;
1418 release_unused_pictures(h, 0);
1422 assert(h->mb_num == h->mb_width * h->mb_height);
1423 if (first_mb_in_slice << FIELD_OR_MBAFF_PICTURE(h) >= h->mb_num ||
1424 first_mb_in_slice >= h->mb_num) {
1425 av_log(h->avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1426 return AVERROR_INVALIDDATA;
1428 sl->resync_mb_x = sl->mb_x = first_mb_in_slice % h->mb_width;
1429 sl->resync_mb_y = sl->mb_y = (first_mb_in_slice / h->mb_width) <<
1430 FIELD_OR_MBAFF_PICTURE(h);
1431 if (h->picture_structure == PICT_BOTTOM_FIELD)
1432 sl->resync_mb_y = sl->mb_y = sl->mb_y + 1;
1433 assert(sl->mb_y < h->mb_height);
1435 if (h->picture_structure == PICT_FRAME) {
1436 h->curr_pic_num = h->frame_num;
1437 h->max_pic_num = 1 << h->sps.log2_max_frame_num;
1439 h->curr_pic_num = 2 * h->frame_num + 1;
1440 h->max_pic_num = 1 << (h->sps.log2_max_frame_num + 1);
1443 if (h->nal_unit_type == NAL_IDR_SLICE)
1444 get_ue_golomb(&sl->gb); /* idr_pic_id */
1446 if (h->sps.poc_type == 0) {
1447 int poc_lsb = get_bits(&sl->gb, h->sps.log2_max_poc_lsb);
1449 if (!h->setup_finished)
1450 h->poc_lsb = poc_lsb;
1452 if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME) {
1453 int delta_poc_bottom = get_se_golomb(&sl->gb);
1454 if (!h->setup_finished)
1455 h->delta_poc_bottom = delta_poc_bottom;
1459 if (h->sps.poc_type == 1 && !h->sps.delta_pic_order_always_zero_flag) {
1460 int delta_poc = get_se_golomb(&sl->gb);
1462 if (!h->setup_finished)
1463 h->delta_poc[0] = delta_poc;
1465 if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME) {
1466 delta_poc = get_se_golomb(&sl->gb);
1468 if (!h->setup_finished)
1469 h->delta_poc[1] = delta_poc;
1473 if (!h->setup_finished)
1474 ff_init_poc(h, h->cur_pic_ptr->field_poc, &h->cur_pic_ptr->poc);
1476 if (h->pps.redundant_pic_cnt_present)
1477 sl->redundant_pic_count = get_ue_golomb(&sl->gb);
1479 ret = ff_set_ref_count(h, sl);
1483 if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
1484 ret = ff_h264_decode_ref_pic_list_reordering(h, sl);
1486 sl->ref_count[1] = sl->ref_count[0] = 0;
1491 if ((h->pps.weighted_pred && sl->slice_type_nos == AV_PICTURE_TYPE_P) ||
1492 (h->pps.weighted_bipred_idc == 1 &&
1493 sl->slice_type_nos == AV_PICTURE_TYPE_B))
1494 ff_pred_weight_table(h, sl);
1495 else if (h->pps.weighted_bipred_idc == 2 &&
1496 sl->slice_type_nos == AV_PICTURE_TYPE_B) {
1497 implicit_weight_table(h, sl, -1);
1500 for (i = 0; i < 2; i++) {
1501 sl->luma_weight_flag[i] = 0;
1502 sl->chroma_weight_flag[i] = 0;
1506 // If frame-mt is enabled, only update mmco tables for the first slice
1507 // in a field. Subsequent slices can temporarily clobber h->mmco_index
1508 // or h->mmco, which will cause ref list mix-ups and decoding errors
1509 // further down the line. This may break decoding if the first slice is
1510 // corrupt, thus we only do this if frame-mt is enabled.
1511 if (h->nal_ref_idc) {
1512 ret = ff_h264_decode_ref_pic_marking(h, &sl->gb,
1513 !(h->avctx->active_thread_type & FF_THREAD_FRAME) ||
1514 h->current_slice == 0);
1515 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1516 return AVERROR_INVALIDDATA;
1519 if (FRAME_MBAFF(h)) {
1520 ff_h264_fill_mbaff_ref_list(h, sl);
1522 if (h->pps.weighted_bipred_idc == 2 && sl->slice_type_nos == AV_PICTURE_TYPE_B) {
1523 implicit_weight_table(h, sl, 0);
1524 implicit_weight_table(h, sl, 1);
1528 if (sl->slice_type_nos == AV_PICTURE_TYPE_B && !sl->direct_spatial_mv_pred)
1529 ff_h264_direct_dist_scale_factor(h, sl);
1530 ff_h264_direct_ref_list_init(h, sl);
1532 if (sl->slice_type_nos != AV_PICTURE_TYPE_I && h->pps.cabac) {
1533 tmp = get_ue_golomb_31(&sl->gb);
1535 av_log(h->avctx, AV_LOG_ERROR, "cabac_init_idc %u overflow\n", tmp);
1536 return AVERROR_INVALIDDATA;
1538 sl->cabac_init_idc = tmp;
1541 sl->last_qscale_diff = 0;
1542 tmp = h->pps.init_qp + get_se_golomb(&sl->gb);
1543 if (tmp > 51 + 6 * (h->sps.bit_depth_luma - 8)) {
1544 av_log(h->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
1545 return AVERROR_INVALIDDATA;
1548 sl->chroma_qp[0] = get_chroma_qp(h, 0, sl->qscale);
1549 sl->chroma_qp[1] = get_chroma_qp(h, 1, sl->qscale);
1550 // FIXME qscale / qp ... stuff
1551 if (sl->slice_type == AV_PICTURE_TYPE_SP)
1552 get_bits1(&sl->gb); /* sp_for_switch_flag */
1553 if (sl->slice_type == AV_PICTURE_TYPE_SP ||
1554 sl->slice_type == AV_PICTURE_TYPE_SI)
1555 get_se_golomb(&sl->gb); /* slice_qs_delta */
1557 sl->deblocking_filter = 1;
1558 sl->slice_alpha_c0_offset = 0;
1559 sl->slice_beta_offset = 0;
1560 if (h->pps.deblocking_filter_parameters_present) {
1561 tmp = get_ue_golomb_31(&sl->gb);
1563 av_log(h->avctx, AV_LOG_ERROR,
1564 "deblocking_filter_idc %u out of range\n", tmp);
1565 return AVERROR_INVALIDDATA;
1567 sl->deblocking_filter = tmp;
1568 if (sl->deblocking_filter < 2)
1569 sl->deblocking_filter ^= 1; // 1<->0
1571 if (sl->deblocking_filter) {
1572 sl->slice_alpha_c0_offset = get_se_golomb(&sl->gb) * 2;
1573 sl->slice_beta_offset = get_se_golomb(&sl->gb) * 2;
1574 if (sl->slice_alpha_c0_offset > 12 ||
1575 sl->slice_alpha_c0_offset < -12 ||
1576 sl->slice_beta_offset > 12 ||
1577 sl->slice_beta_offset < -12) {
1578 av_log(h->avctx, AV_LOG_ERROR,
1579 "deblocking filter parameters %d %d out of range\n",
1580 sl->slice_alpha_c0_offset, sl->slice_beta_offset);
1581 return AVERROR_INVALIDDATA;
1586 if (h->avctx->skip_loop_filter >= AVDISCARD_ALL ||
1587 (h->avctx->skip_loop_filter >= AVDISCARD_NONKEY &&
1588 sl->slice_type_nos != AV_PICTURE_TYPE_I) ||
1589 (h->avctx->skip_loop_filter >= AVDISCARD_BIDIR &&
1590 sl->slice_type_nos == AV_PICTURE_TYPE_B) ||
1591 (h->avctx->skip_loop_filter >= AVDISCARD_NONREF &&
1592 h->nal_ref_idc == 0))
1593 sl->deblocking_filter = 0;
1595 if (sl->deblocking_filter == 1 && h->max_contexts > 1) {
1596 if (h->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1597 /* Cheat slightly for speed:
1598 * Do not bother to deblock across slices. */
1599 sl->deblocking_filter = 2;
1601 h->max_contexts = 1;
1602 if (!h->single_decode_warning) {
1603 av_log(h->avctx, AV_LOG_INFO,
1604 "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
1605 h->single_decode_warning = 1;
1607 if (sl != h->slice_ctx) {
1608 av_log(h->avctx, AV_LOG_ERROR,
1609 "Deblocking switched inside frame.\n");
1614 sl->qp_thresh = 15 -
1615 FFMIN(sl->slice_alpha_c0_offset, sl->slice_beta_offset) -
1617 h->pps.chroma_qp_index_offset[0],
1618 h->pps.chroma_qp_index_offset[1]) +
1619 6 * (h->sps.bit_depth_luma - 8);
1621 sl->slice_num = ++h->current_slice;
1622 if (sl->slice_num >= MAX_SLICES) {
1623 av_log(h->avctx, AV_LOG_ERROR,
1624 "Too many slices, increase MAX_SLICES and recompile\n");
1627 for (j = 0; j < 2; j++) {
1629 int *ref2frm = sl->ref2frm[sl->slice_num & (MAX_SLICES - 1)][j];
1630 for (i = 0; i < 16; i++) {
1632 if (j < sl->list_count && i < sl->ref_count[j] &&
1633 sl->ref_list[j][i].parent->f->buf[0]) {
1635 AVBuffer *buf = sl->ref_list[j][i].parent->f->buf[0]->buffer;
1636 for (k = 0; k < h->short_ref_count; k++)
1637 if (h->short_ref[k]->f->buf[0]->buffer == buf) {
1641 for (k = 0; k < h->long_ref_count; k++)
1642 if (h->long_ref[k] && h->long_ref[k]->f->buf[0]->buffer == buf) {
1643 id_list[i] = h->short_ref_count + k;
1651 for (i = 0; i < 16; i++)
1652 ref2frm[i + 2] = 4 * id_list[i] + (sl->ref_list[j][i].reference & 3);
1654 ref2frm[18 + 1] = -1;
1655 for (i = 16; i < 48; i++)
1656 ref2frm[i + 4] = 4 * id_list[(i - 16) >> 1] +
1657 (sl->ref_list[j][i].reference & 3);
1660 if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
1661 av_log(h->avctx, AV_LOG_DEBUG,
1662 "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",
1664 (h->picture_structure == PICT_FRAME ? "F" : h->picture_structure == PICT_TOP_FIELD ? "T" : "B"),
1666 av_get_picture_type_char(sl->slice_type),
1667 sl->slice_type_fixed ? " fix" : "",
1668 h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
1669 pps_id, h->frame_num,
1670 h->cur_pic_ptr->field_poc[0],
1671 h->cur_pic_ptr->field_poc[1],
1672 sl->ref_count[0], sl->ref_count[1],
1674 sl->deblocking_filter,
1675 sl->slice_alpha_c0_offset, sl->slice_beta_offset,
1677 sl->use_weight == 1 && sl->use_weight_chroma ? "c" : "",
1678 sl->slice_type == AV_PICTURE_TYPE_B ? (sl->direct_spatial_mv_pred ? "SPAT" : "TEMP") : "");
1684 int ff_h264_get_slice_type(const H264SliceContext *sl)
1686 switch (sl->slice_type) {
1687 case AV_PICTURE_TYPE_P:
1689 case AV_PICTURE_TYPE_B:
1691 case AV_PICTURE_TYPE_I:
1693 case AV_PICTURE_TYPE_SP:
1695 case AV_PICTURE_TYPE_SI:
1698 return AVERROR_INVALIDDATA;
1702 static av_always_inline void fill_filter_caches_inter(const H264Context *h,
1703 H264SliceContext *sl,
1704 int mb_type, int top_xy,
1705 int left_xy[LEFT_MBS],
1707 int left_type[LEFT_MBS],
1708 int mb_xy, int list)
1710 int b_stride = h->b_stride;
1711 int16_t(*mv_dst)[2] = &sl->mv_cache[list][scan8[0]];
1712 int8_t *ref_cache = &sl->ref_cache[list][scan8[0]];
1713 if (IS_INTER(mb_type) || IS_DIRECT(mb_type)) {
1714 if (USES_LIST(top_type, list)) {
1715 const int b_xy = h->mb2b_xy[top_xy] + 3 * b_stride;
1716 const int b8_xy = 4 * top_xy + 2;
1717 int (*ref2frm)[64] = sl->ref2frm[h->slice_table[top_xy] & (MAX_SLICES - 1)][0] + (MB_MBAFF(sl) ? 20 : 2);
1718 AV_COPY128(mv_dst - 1 * 8, h->cur_pic.motion_val[list][b_xy + 0]);
1719 ref_cache[0 - 1 * 8] =
1720 ref_cache[1 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 0]];
1721 ref_cache[2 - 1 * 8] =
1722 ref_cache[3 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 1]];
1724 AV_ZERO128(mv_dst - 1 * 8);
1725 AV_WN32A(&ref_cache[0 - 1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
1728 if (!IS_INTERLACED(mb_type ^ left_type[LTOP])) {
1729 if (USES_LIST(left_type[LTOP], list)) {
1730 const int b_xy = h->mb2b_xy[left_xy[LTOP]] + 3;
1731 const int b8_xy = 4 * left_xy[LTOP] + 1;
1732 int (*ref2frm)[64] = sl->ref2frm[h->slice_table[left_xy[LTOP]] & (MAX_SLICES - 1)][0] + (MB_MBAFF(sl) ? 20 : 2);
1733 AV_COPY32(mv_dst - 1 + 0, h->cur_pic.motion_val[list][b_xy + b_stride * 0]);
1734 AV_COPY32(mv_dst - 1 + 8, h->cur_pic.motion_val[list][b_xy + b_stride * 1]);
1735 AV_COPY32(mv_dst - 1 + 16, h->cur_pic.motion_val[list][b_xy + b_stride * 2]);
1736 AV_COPY32(mv_dst - 1 + 24, h->cur_pic.motion_val[list][b_xy + b_stride * 3]);
1738 ref_cache[-1 + 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 0]];
1739 ref_cache[-1 + 16] =
1740 ref_cache[-1 + 24] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 1]];
1742 AV_ZERO32(mv_dst - 1 + 0);
1743 AV_ZERO32(mv_dst - 1 + 8);
1744 AV_ZERO32(mv_dst - 1 + 16);
1745 AV_ZERO32(mv_dst - 1 + 24);
1748 ref_cache[-1 + 16] =
1749 ref_cache[-1 + 24] = LIST_NOT_USED;
1754 if (!USES_LIST(mb_type, list)) {
1755 fill_rectangle(mv_dst, 4, 4, 8, pack16to32(0, 0), 4);
1756 AV_WN32A(&ref_cache[0 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
1757 AV_WN32A(&ref_cache[1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
1758 AV_WN32A(&ref_cache[2 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
1759 AV_WN32A(&ref_cache[3 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
1764 int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
1765 int (*ref2frm)[64] = sl->ref2frm[sl->slice_num & (MAX_SLICES - 1)][0] + (MB_MBAFF(sl) ? 20 : 2);
1766 uint32_t ref01 = (pack16to32(ref2frm[list][ref[0]], ref2frm[list][ref[1]]) & 0x00FF00FF) * 0x0101;
1767 uint32_t ref23 = (pack16to32(ref2frm[list][ref[2]], ref2frm[list][ref[3]]) & 0x00FF00FF) * 0x0101;
1768 AV_WN32A(&ref_cache[0 * 8], ref01);
1769 AV_WN32A(&ref_cache[1 * 8], ref01);
1770 AV_WN32A(&ref_cache[2 * 8], ref23);
1771 AV_WN32A(&ref_cache[3 * 8], ref23);
1775 int16_t(*mv_src)[2] = &h->cur_pic.motion_val[list][4 * sl->mb_x + 4 * sl->mb_y * b_stride];
1776 AV_COPY128(mv_dst + 8 * 0, mv_src + 0 * b_stride);
1777 AV_COPY128(mv_dst + 8 * 1, mv_src + 1 * b_stride);
1778 AV_COPY128(mv_dst + 8 * 2, mv_src + 2 * b_stride);
1779 AV_COPY128(mv_dst + 8 * 3, mv_src + 3 * b_stride);
1785 * @return non zero if the loop filter can be skipped
1787 static int fill_filter_caches(const H264Context *h, H264SliceContext *sl, int mb_type)
1789 const int mb_xy = sl->mb_xy;
1790 int top_xy, left_xy[LEFT_MBS];
1791 int top_type, left_type[LEFT_MBS];
1795 top_xy = mb_xy - (h->mb_stride << MB_FIELD(sl));
1797 /* Wow, what a mess, why didn't they simplify the interlacing & intra
1798 * stuff, I can't imagine that these complex rules are worth it. */
1800 left_xy[LBOT] = left_xy[LTOP] = mb_xy - 1;
1801 if (FRAME_MBAFF(h)) {
1802 const int left_mb_field_flag = IS_INTERLACED(h->cur_pic.mb_type[mb_xy - 1]);
1803 const int curr_mb_field_flag = IS_INTERLACED(mb_type);
1805 if (left_mb_field_flag != curr_mb_field_flag)
1806 left_xy[LTOP] -= h->mb_stride;
1808 if (curr_mb_field_flag)
1809 top_xy += h->mb_stride &
1810 (((h->cur_pic.mb_type[top_xy] >> 7) & 1) - 1);
1811 if (left_mb_field_flag != curr_mb_field_flag)
1812 left_xy[LBOT] += h->mb_stride;
1816 sl->top_mb_xy = top_xy;
1817 sl->left_mb_xy[LTOP] = left_xy[LTOP];
1818 sl->left_mb_xy[LBOT] = left_xy[LBOT];
1820 /* For sufficiently low qp, filtering wouldn't do anything.
1821 * This is a conservative estimate: could also check beta_offset
1822 * and more accurate chroma_qp. */
1823 int qp_thresh = sl->qp_thresh; // FIXME strictly we should store qp_thresh for each mb of a slice
1824 int qp = h->cur_pic.qscale_table[mb_xy];
1825 if (qp <= qp_thresh &&
1826 (left_xy[LTOP] < 0 ||
1827 ((qp + h->cur_pic.qscale_table[left_xy[LTOP]] + 1) >> 1) <= qp_thresh) &&
1829 ((qp + h->cur_pic.qscale_table[top_xy] + 1) >> 1) <= qp_thresh)) {
1830 if (!FRAME_MBAFF(h))
1832 if ((left_xy[LTOP] < 0 ||
1833 ((qp + h->cur_pic.qscale_table[left_xy[LBOT]] + 1) >> 1) <= qp_thresh) &&
1834 (top_xy < h->mb_stride ||
1835 ((qp + h->cur_pic.qscale_table[top_xy - h->mb_stride] + 1) >> 1) <= qp_thresh))
1840 top_type = h->cur_pic.mb_type[top_xy];
1841 left_type[LTOP] = h->cur_pic.mb_type[left_xy[LTOP]];
1842 left_type[LBOT] = h->cur_pic.mb_type[left_xy[LBOT]];
1843 if (sl->deblocking_filter == 2) {
1844 if (h->slice_table[top_xy] != sl->slice_num)
1846 if (h->slice_table[left_xy[LBOT]] != sl->slice_num)
1847 left_type[LTOP] = left_type[LBOT] = 0;
1849 if (h->slice_table[top_xy] == 0xFFFF)
1851 if (h->slice_table[left_xy[LBOT]] == 0xFFFF)
1852 left_type[LTOP] = left_type[LBOT] = 0;
1854 sl->top_type = top_type;
1855 sl->left_type[LTOP] = left_type[LTOP];
1856 sl->left_type[LBOT] = left_type[LBOT];
1858 if (IS_INTRA(mb_type))
1861 fill_filter_caches_inter(h, sl, mb_type, top_xy, left_xy,
1862 top_type, left_type, mb_xy, 0);
1863 if (sl->list_count == 2)
1864 fill_filter_caches_inter(h, sl, mb_type, top_xy, left_xy,
1865 top_type, left_type, mb_xy, 1);
1867 nnz = h->non_zero_count[mb_xy];
1868 nnz_cache = sl->non_zero_count_cache;
1869 AV_COPY32(&nnz_cache[4 + 8 * 1], &nnz[0]);
1870 AV_COPY32(&nnz_cache[4 + 8 * 2], &nnz[4]);
1871 AV_COPY32(&nnz_cache[4 + 8 * 3], &nnz[8]);
1872 AV_COPY32(&nnz_cache[4 + 8 * 4], &nnz[12]);
1873 sl->cbp = h->cbp_table[mb_xy];
1876 nnz = h->non_zero_count[top_xy];
1877 AV_COPY32(&nnz_cache[4 + 8 * 0], &nnz[3 * 4]);
1880 if (left_type[LTOP]) {
1881 nnz = h->non_zero_count[left_xy[LTOP]];
1882 nnz_cache[3 + 8 * 1] = nnz[3 + 0 * 4];
1883 nnz_cache[3 + 8 * 2] = nnz[3 + 1 * 4];
1884 nnz_cache[3 + 8 * 3] = nnz[3 + 2 * 4];
1885 nnz_cache[3 + 8 * 4] = nnz[3 + 3 * 4];
1888 /* CAVLC 8x8dct requires NNZ values for residual decoding that differ
1889 * from what the loop filter needs */
1890 if (!CABAC(h) && h->pps.transform_8x8_mode) {
1891 if (IS_8x8DCT(top_type)) {
1892 nnz_cache[4 + 8 * 0] =
1893 nnz_cache[5 + 8 * 0] = (h->cbp_table[top_xy] & 0x4000) >> 12;
1894 nnz_cache[6 + 8 * 0] =
1895 nnz_cache[7 + 8 * 0] = (h->cbp_table[top_xy] & 0x8000) >> 12;
1897 if (IS_8x8DCT(left_type[LTOP])) {
1898 nnz_cache[3 + 8 * 1] =
1899 nnz_cache[3 + 8 * 2] = (h->cbp_table[left_xy[LTOP]] & 0x2000) >> 12; // FIXME check MBAFF
1901 if (IS_8x8DCT(left_type[LBOT])) {
1902 nnz_cache[3 + 8 * 3] =
1903 nnz_cache[3 + 8 * 4] = (h->cbp_table[left_xy[LBOT]] & 0x8000) >> 12; // FIXME check MBAFF
1906 if (IS_8x8DCT(mb_type)) {
1907 nnz_cache[scan8[0]] =
1908 nnz_cache[scan8[1]] =
1909 nnz_cache[scan8[2]] =
1910 nnz_cache[scan8[3]] = (sl->cbp & 0x1000) >> 12;
1912 nnz_cache[scan8[0 + 4]] =
1913 nnz_cache[scan8[1 + 4]] =
1914 nnz_cache[scan8[2 + 4]] =
1915 nnz_cache[scan8[3 + 4]] = (sl->cbp & 0x2000) >> 12;
1917 nnz_cache[scan8[0 + 8]] =
1918 nnz_cache[scan8[1 + 8]] =
1919 nnz_cache[scan8[2 + 8]] =
1920 nnz_cache[scan8[3 + 8]] = (sl->cbp & 0x4000) >> 12;
1922 nnz_cache[scan8[0 + 12]] =
1923 nnz_cache[scan8[1 + 12]] =
1924 nnz_cache[scan8[2 + 12]] =
1925 nnz_cache[scan8[3 + 12]] = (sl->cbp & 0x8000) >> 12;
1932 static void loop_filter(const H264Context *h, H264SliceContext *sl, int start_x, int end_x)
1934 uint8_t *dest_y, *dest_cb, *dest_cr;
1935 int linesize, uvlinesize, mb_x, mb_y;
1936 const int end_mb_y = sl->mb_y + FRAME_MBAFF(h);
1937 const int old_slice_type = sl->slice_type;
1938 const int pixel_shift = h->pixel_shift;
1939 const int block_h = 16 >> h->chroma_y_shift;
1941 if (sl->deblocking_filter) {
1942 for (mb_x = start_x; mb_x < end_x; mb_x++)
1943 for (mb_y = end_mb_y - FRAME_MBAFF(h); mb_y <= end_mb_y; mb_y++) {
1945 mb_xy = sl->mb_xy = mb_x + mb_y * h->mb_stride;
1946 sl->slice_num = h->slice_table[mb_xy];
1947 mb_type = h->cur_pic.mb_type[mb_xy];
1948 sl->list_count = h->list_counts[mb_xy];
1952 sl->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
1956 dest_y = h->cur_pic.f->data[0] +
1957 ((mb_x << pixel_shift) + mb_y * sl->linesize) * 16;
1958 dest_cb = h->cur_pic.f->data[1] +
1959 (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
1960 mb_y * sl->uvlinesize * block_h;
1961 dest_cr = h->cur_pic.f->data[2] +
1962 (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
1963 mb_y * sl->uvlinesize * block_h;
1964 // FIXME simplify above
1967 linesize = sl->mb_linesize = sl->linesize * 2;
1968 uvlinesize = sl->mb_uvlinesize = sl->uvlinesize * 2;
1969 if (mb_y & 1) { // FIXME move out of this function?
1970 dest_y -= sl->linesize * 15;
1971 dest_cb -= sl->uvlinesize * (block_h - 1);
1972 dest_cr -= sl->uvlinesize * (block_h - 1);
1975 linesize = sl->mb_linesize = sl->linesize;
1976 uvlinesize = sl->mb_uvlinesize = sl->uvlinesize;
1978 backup_mb_border(h, sl, dest_y, dest_cb, dest_cr, linesize,
1980 if (fill_filter_caches(h, sl, mb_type))
1982 sl->chroma_qp[0] = get_chroma_qp(h, 0, h->cur_pic.qscale_table[mb_xy]);
1983 sl->chroma_qp[1] = get_chroma_qp(h, 1, h->cur_pic.qscale_table[mb_xy]);
1985 if (FRAME_MBAFF(h)) {
1986 ff_h264_filter_mb(h, sl, mb_x, mb_y, dest_y, dest_cb, dest_cr,
1987 linesize, uvlinesize);
1989 ff_h264_filter_mb_fast(h, sl, mb_x, mb_y, dest_y, dest_cb,
1990 dest_cr, linesize, uvlinesize);
1994 sl->slice_type = old_slice_type;
1996 sl->mb_y = end_mb_y - FRAME_MBAFF(h);
1997 sl->chroma_qp[0] = get_chroma_qp(h, 0, sl->qscale);
1998 sl->chroma_qp[1] = get_chroma_qp(h, 1, sl->qscale);
2001 static void predict_field_decoding_flag(const H264Context *h, H264SliceContext *sl)
2003 const int mb_xy = sl->mb_x + sl->mb_y * h->mb_stride;
2004 int mb_type = (h->slice_table[mb_xy - 1] == sl->slice_num) ?
2005 h->cur_pic.mb_type[mb_xy - 1] :
2006 (h->slice_table[mb_xy - h->mb_stride] == sl->slice_num) ?
2007 h->cur_pic.mb_type[mb_xy - h->mb_stride] : 0;
2008 sl->mb_mbaff = sl->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2012 * Draw edges and report progress for the last MB row.
2014 static void decode_finish_row(const H264Context *h, H264SliceContext *sl)
2016 int top = 16 * (sl->mb_y >> FIELD_PICTURE(h));
2017 int pic_height = 16 * h->mb_height >> FIELD_PICTURE(h);
2018 int height = 16 << FRAME_MBAFF(h);
2019 int deblock_border = (16 + 4) << FRAME_MBAFF(h);
2021 if (sl->deblocking_filter) {
2022 if ((top + height) >= pic_height)
2023 height += deblock_border;
2024 top -= deblock_border;
2027 if (top >= pic_height || (top + height) < 0)
2030 height = FFMIN(height, pic_height - top);
2032 height = top + height;
2036 ff_h264_draw_horiz_band(h, sl, top, height);
2041 ff_thread_report_progress(&h->cur_pic_ptr->tf, top + height - 1,
2042 h->picture_structure == PICT_BOTTOM_FIELD);
2045 static void er_add_slice(H264SliceContext *sl,
2046 int startx, int starty,
2047 int endx, int endy, int status)
2049 #if CONFIG_ERROR_RESILIENCE
2050 ERContext *er = &sl->er;
2052 if (!sl->h264->enable_er)
2055 er->ref_count = sl->ref_count[0];
2056 ff_er_add_slice(er, startx, starty, endx, endy, status);
2060 static int decode_slice(struct AVCodecContext *avctx, void *arg)
2062 H264SliceContext *sl = arg;
2063 const H264Context *h = sl->h264;
2064 int lf_x_start = sl->mb_x;
2067 sl->linesize = h->cur_pic_ptr->f->linesize[0];
2068 sl->uvlinesize = h->cur_pic_ptr->f->linesize[1];
2070 ret = alloc_scratch_buffers(sl, sl->linesize);
2074 sl->mb_skip_run = -1;
2076 sl->is_complex = FRAME_MBAFF(h) || h->picture_structure != PICT_FRAME ||
2077 avctx->codec_id != AV_CODEC_ID_H264 ||
2078 (CONFIG_GRAY && (h->flags & AV_CODEC_FLAG_GRAY));
2082 align_get_bits(&sl->gb);
2085 ff_init_cabac_decoder(&sl->cabac,
2086 sl->gb.buffer + get_bits_count(&sl->gb) / 8,
2087 (get_bits_left(&sl->gb) + 7) / 8);
2089 ff_h264_init_cabac_states(h, sl);
2095 if (sl->mb_x + sl->mb_y * h->mb_width >= sl->next_slice_idx) {
2096 av_log(h->avctx, AV_LOG_ERROR, "Slice overlaps with next at %d\n",
2097 sl->next_slice_idx);
2098 return AVERROR_INVALIDDATA;
2101 ret = ff_h264_decode_mb_cabac(h, sl);
2102 // STOP_TIMER("decode_mb_cabac")
2105 ff_h264_hl_decode_mb(h, sl);
2107 // FIXME optimal? or let mb_decode decode 16x32 ?
2108 if (ret >= 0 && FRAME_MBAFF(h)) {
2111 ret = ff_h264_decode_mb_cabac(h, sl);
2114 ff_h264_hl_decode_mb(h, sl);
2117 eos = get_cabac_terminate(&sl->cabac);
2119 if ((h->workaround_bugs & FF_BUG_TRUNCATED) &&
2120 sl->cabac.bytestream > sl->cabac.bytestream_end + 2) {
2121 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x - 1,
2122 sl->mb_y, ER_MB_END);
2123 if (sl->mb_x >= lf_x_start)
2124 loop_filter(h, sl, lf_x_start, sl->mb_x + 1);
2127 if (ret < 0 || sl->cabac.bytestream > sl->cabac.bytestream_end + 2) {
2128 av_log(h->avctx, AV_LOG_ERROR,
2129 "error while decoding MB %d %d, bytestream %td\n",
2131 sl->cabac.bytestream_end - sl->cabac.bytestream);
2132 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2133 sl->mb_y, ER_MB_ERROR);
2134 return AVERROR_INVALIDDATA;
2137 if (++sl->mb_x >= h->mb_width) {
2138 loop_filter(h, sl, lf_x_start, sl->mb_x);
2139 sl->mb_x = lf_x_start = 0;
2140 decode_finish_row(h, sl);
2142 if (FIELD_OR_MBAFF_PICTURE(h)) {
2144 if (FRAME_MBAFF(h) && sl->mb_y < h->mb_height)
2145 predict_field_decoding_flag(h, sl);
2149 if (eos || sl->mb_y >= h->mb_height) {
2150 ff_tlog(h->avctx, "slice end %d %d\n",
2151 get_bits_count(&sl->gb), sl->gb.size_in_bits);
2152 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x - 1,
2153 sl->mb_y, ER_MB_END);
2154 if (sl->mb_x > lf_x_start)
2155 loop_filter(h, sl, lf_x_start, sl->mb_x);
2163 if (sl->mb_x + sl->mb_y * h->mb_width >= sl->next_slice_idx) {
2164 av_log(h->avctx, AV_LOG_ERROR, "Slice overlaps with next at %d\n",
2165 sl->next_slice_idx);
2166 return AVERROR_INVALIDDATA;
2169 ret = ff_h264_decode_mb_cavlc(h, sl);
2172 ff_h264_hl_decode_mb(h, sl);
2174 // FIXME optimal? or let mb_decode decode 16x32 ?
2175 if (ret >= 0 && FRAME_MBAFF(h)) {
2177 ret = ff_h264_decode_mb_cavlc(h, sl);
2180 ff_h264_hl_decode_mb(h, sl);
2185 av_log(h->avctx, AV_LOG_ERROR,
2186 "error while decoding MB %d %d\n", sl->mb_x, sl->mb_y);
2187 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2188 sl->mb_y, ER_MB_ERROR);
2192 if (++sl->mb_x >= h->mb_width) {
2193 loop_filter(h, sl, lf_x_start, sl->mb_x);
2194 sl->mb_x = lf_x_start = 0;
2195 decode_finish_row(h, sl);
2197 if (FIELD_OR_MBAFF_PICTURE(h)) {
2199 if (FRAME_MBAFF(h) && sl->mb_y < h->mb_height)
2200 predict_field_decoding_flag(h, sl);
2202 if (sl->mb_y >= h->mb_height) {
2203 ff_tlog(h->avctx, "slice end %d %d\n",
2204 get_bits_count(&sl->gb), sl->gb.size_in_bits);
2206 if (get_bits_left(&sl->gb) == 0) {
2207 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2208 sl->mb_x - 1, sl->mb_y, ER_MB_END);
2212 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2213 sl->mb_x - 1, sl->mb_y, ER_MB_END);
2215 return AVERROR_INVALIDDATA;
2220 if (get_bits_left(&sl->gb) <= 0 && sl->mb_skip_run <= 0) {
2221 ff_tlog(h->avctx, "slice end %d %d\n",
2222 get_bits_count(&sl->gb), sl->gb.size_in_bits);
2224 if (get_bits_left(&sl->gb) == 0) {
2225 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2226 sl->mb_x - 1, sl->mb_y, ER_MB_END);
2227 if (sl->mb_x > lf_x_start)
2228 loop_filter(h, sl, lf_x_start, sl->mb_x);
2232 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2233 sl->mb_y, ER_MB_ERROR);
2235 return AVERROR_INVALIDDATA;
2243 * Call decode_slice() for each context.
2245 * @param h h264 master context
2246 * @param context_count number of contexts to execute
2248 int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count)
2250 AVCodecContext *const avctx = h->avctx;
2251 H264SliceContext *sl;
2254 if (h->avctx->hwaccel)
2256 if (context_count == 1) {
2259 h->slice_ctx[0].next_slice_idx = h->mb_width * h->mb_height;
2261 ret = decode_slice(avctx, &h->slice_ctx[0]);
2262 h->mb_y = h->slice_ctx[0].mb_y;
2265 for (i = 0; i < context_count; i++) {
2266 int next_slice_idx = h->mb_width * h->mb_height;
2269 sl = &h->slice_ctx[i];
2270 sl->er.error_count = 0;
2272 /* make sure none of those slices overlap */
2273 slice_idx = sl->mb_y * h->mb_width + sl->mb_x;
2274 for (j = 0; j < context_count; j++) {
2275 H264SliceContext *sl2 = &h->slice_ctx[j];
2276 int slice_idx2 = sl2->mb_y * h->mb_width + sl2->mb_x;
2278 if (i == j || slice_idx2 < slice_idx)
2280 next_slice_idx = FFMIN(next_slice_idx, slice_idx2);
2282 sl->next_slice_idx = next_slice_idx;
2285 avctx->execute(avctx, decode_slice, h->slice_ctx,
2286 NULL, context_count, sizeof(h->slice_ctx[0]));
2288 /* pull back stuff from slices to master context */
2289 sl = &h->slice_ctx[context_count - 1];
2291 for (i = 1; i < context_count; i++)
2292 h->slice_ctx[0].er.error_count += h->slice_ctx[i].er.error_count;