2 * VC-1 and WMV3 decoder
3 * Copyright (c) 2011 Mashiat Sarker Shakkhar
4 * Copyright (c) 2006-2007 Konstantin Shishkov
5 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
7 * This file is part of FFmpeg.
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * VC-1 and WMV3 decoder
34 #include "mpegvideo.h"
36 #include "msmpeg4data.h"
40 #include "vdpau_compat.h"
41 #include "libavutil/avassert.h"
44 #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
46 typedef struct SpriteData {
48 * Transform coefficients for both sprites in 16.16 fixed point format,
49 * in the order they appear in the bitstream:
60 int effect_type, effect_flag;
61 int effect_pcount1, effect_pcount2; ///< amount of effect parameters stored in effect_params
62 int effect_params1[15], effect_params2[10]; ///< effect parameters in 16.16 fixed point format
65 static inline int get_fp_val(GetBitContext* gb)
67 return (get_bits_long(gb, 30) - (1 << 29)) << 1;
70 static void vc1_sprite_parse_transform(GetBitContext* gb, int c[7])
74 switch (get_bits(gb, 2)) {
77 c[2] = get_fp_val(gb);
81 c[0] = c[4] = get_fp_val(gb);
82 c[2] = get_fp_val(gb);
85 c[0] = get_fp_val(gb);
86 c[2] = get_fp_val(gb);
87 c[4] = get_fp_val(gb);
90 c[0] = get_fp_val(gb);
91 c[1] = get_fp_val(gb);
92 c[2] = get_fp_val(gb);
93 c[3] = get_fp_val(gb);
94 c[4] = get_fp_val(gb);
97 c[5] = get_fp_val(gb);
99 c[6] = get_fp_val(gb);
104 static int vc1_parse_sprites(VC1Context *v, GetBitContext* gb, SpriteData* sd)
106 AVCodecContext *avctx = v->s.avctx;
109 for (sprite = 0; sprite <= v->two_sprites; sprite++) {
110 vc1_sprite_parse_transform(gb, sd->coefs[sprite]);
111 if (sd->coefs[sprite][1] || sd->coefs[sprite][3])
112 avpriv_request_sample(avctx, "Non-zero rotation coefficients");
113 av_log(avctx, AV_LOG_DEBUG, sprite ? "S2:" : "S1:");
114 for (i = 0; i < 7; i++)
115 av_log(avctx, AV_LOG_DEBUG, " %d.%.3d",
116 sd->coefs[sprite][i] / (1<<16),
117 (abs(sd->coefs[sprite][i]) & 0xFFFF) * 1000 / (1 << 16));
118 av_log(avctx, AV_LOG_DEBUG, "\n");
122 if (sd->effect_type = get_bits_long(gb, 30)) {
123 switch (sd->effect_pcount1 = get_bits(gb, 4)) {
125 vc1_sprite_parse_transform(gb, sd->effect_params1);
128 vc1_sprite_parse_transform(gb, sd->effect_params1);
129 vc1_sprite_parse_transform(gb, sd->effect_params1 + 7);
132 for (i = 0; i < sd->effect_pcount1; i++)
133 sd->effect_params1[i] = get_fp_val(gb);
135 if (sd->effect_type != 13 || sd->effect_params1[0] != sd->coefs[0][6]) {
136 // effect 13 is simple alpha blending and matches the opacity above
137 av_log(avctx, AV_LOG_DEBUG, "Effect: %d; params: ", sd->effect_type);
138 for (i = 0; i < sd->effect_pcount1; i++)
139 av_log(avctx, AV_LOG_DEBUG, " %d.%.2d",
140 sd->effect_params1[i] / (1 << 16),
141 (abs(sd->effect_params1[i]) & 0xFFFF) * 1000 / (1 << 16));
142 av_log(avctx, AV_LOG_DEBUG, "\n");
145 sd->effect_pcount2 = get_bits(gb, 16);
146 if (sd->effect_pcount2 > 10) {
147 av_log(avctx, AV_LOG_ERROR, "Too many effect parameters\n");
148 return AVERROR_INVALIDDATA;
149 } else if (sd->effect_pcount2) {
151 av_log(avctx, AV_LOG_DEBUG, "Effect params 2: ");
152 while (++i < sd->effect_pcount2) {
153 sd->effect_params2[i] = get_fp_val(gb);
154 av_log(avctx, AV_LOG_DEBUG, " %d.%.2d",
155 sd->effect_params2[i] / (1 << 16),
156 (abs(sd->effect_params2[i]) & 0xFFFF) * 1000 / (1 << 16));
158 av_log(avctx, AV_LOG_DEBUG, "\n");
161 if (sd->effect_flag = get_bits1(gb))
162 av_log(avctx, AV_LOG_DEBUG, "Effect flag set\n");
164 if (get_bits_count(gb) >= gb->size_in_bits +
165 (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE ? 64 : 0)) {
166 av_log(avctx, AV_LOG_ERROR, "Buffer overrun\n");
167 return AVERROR_INVALIDDATA;
169 if (get_bits_count(gb) < gb->size_in_bits - 8)
170 av_log(avctx, AV_LOG_WARNING, "Buffer not fully read\n");
175 static void vc1_draw_sprites(VC1Context *v, SpriteData* sd)
177 int i, plane, row, sprite;
178 int sr_cache[2][2] = { { -1, -1 }, { -1, -1 } };
179 uint8_t* src_h[2][2];
180 int xoff[2], xadv[2], yoff[2], yadv[2], alpha;
182 MpegEncContext *s = &v->s;
184 for (i = 0; i <= v->two_sprites; i++) {
185 xoff[i] = av_clip(sd->coefs[i][2], 0, v->sprite_width-1 << 16);
186 xadv[i] = sd->coefs[i][0];
187 if (xadv[i] != 1<<16 || (v->sprite_width << 16) - (v->output_width << 16) - xoff[i])
188 xadv[i] = av_clip(xadv[i], 0, ((v->sprite_width<<16) - xoff[i] - 1) / v->output_width);
190 yoff[i] = av_clip(sd->coefs[i][5], 0, v->sprite_height-1 << 16);
191 yadv[i] = av_clip(sd->coefs[i][4], 0, ((v->sprite_height << 16) - yoff[i]) / v->output_height);
193 alpha = av_clip_uint16(sd->coefs[1][6]);
195 for (plane = 0; plane < (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY ? 1 : 3); plane++) {
196 int width = v->output_width>>!!plane;
198 for (row = 0; row < v->output_height>>!!plane; row++) {
199 uint8_t *dst = v->sprite_output_frame->data[plane] +
200 v->sprite_output_frame->linesize[plane] * row;
202 for (sprite = 0; sprite <= v->two_sprites; sprite++) {
203 uint8_t *iplane = s->current_picture.f->data[plane];
204 int iline = s->current_picture.f->linesize[plane];
205 int ycoord = yoff[sprite] + yadv[sprite] * row;
206 int yline = ycoord >> 16;
208 ysub[sprite] = ycoord & 0xFFFF;
210 iplane = s->last_picture.f->data[plane];
211 iline = s->last_picture.f->linesize[plane];
213 next_line = FFMIN(yline + 1, (v->sprite_height >> !!plane) - 1) * iline;
214 if (!(xoff[sprite] & 0xFFFF) && xadv[sprite] == 1 << 16) {
215 src_h[sprite][0] = iplane + (xoff[sprite] >> 16) + yline * iline;
217 src_h[sprite][1] = iplane + (xoff[sprite] >> 16) + next_line;
219 if (sr_cache[sprite][0] != yline) {
220 if (sr_cache[sprite][1] == yline) {
221 FFSWAP(uint8_t*, v->sr_rows[sprite][0], v->sr_rows[sprite][1]);
222 FFSWAP(int, sr_cache[sprite][0], sr_cache[sprite][1]);
224 v->vc1dsp.sprite_h(v->sr_rows[sprite][0], iplane + yline * iline, xoff[sprite], xadv[sprite], width);
225 sr_cache[sprite][0] = yline;
228 if (ysub[sprite] && sr_cache[sprite][1] != yline + 1) {
229 v->vc1dsp.sprite_h(v->sr_rows[sprite][1],
230 iplane + next_line, xoff[sprite],
231 xadv[sprite], width);
232 sr_cache[sprite][1] = yline + 1;
234 src_h[sprite][0] = v->sr_rows[sprite][0];
235 src_h[sprite][1] = v->sr_rows[sprite][1];
239 if (!v->two_sprites) {
241 v->vc1dsp.sprite_v_single(dst, src_h[0][0], src_h[0][1], ysub[0], width);
243 memcpy(dst, src_h[0][0], width);
246 if (ysub[0] && ysub[1]) {
247 v->vc1dsp.sprite_v_double_twoscale(dst, src_h[0][0], src_h[0][1], ysub[0],
248 src_h[1][0], src_h[1][1], ysub[1], alpha, width);
249 } else if (ysub[0]) {
250 v->vc1dsp.sprite_v_double_onescale(dst, src_h[0][0], src_h[0][1], ysub[0],
251 src_h[1][0], alpha, width);
252 } else if (ysub[1]) {
253 v->vc1dsp.sprite_v_double_onescale(dst, src_h[1][0], src_h[1][1], ysub[1],
254 src_h[0][0], (1<<16)-1-alpha, width);
256 v->vc1dsp.sprite_v_double_noscale(dst, src_h[0][0], src_h[1][0], alpha, width);
262 for (i = 0; i <= v->two_sprites; i++) {
272 static int vc1_decode_sprites(VC1Context *v, GetBitContext* gb)
275 MpegEncContext *s = &v->s;
276 AVCodecContext *avctx = s->avctx;
279 memset(&sd, 0, sizeof(sd));
281 ret = vc1_parse_sprites(v, gb, &sd);
285 if (!s->current_picture.f || !s->current_picture.f->data[0]) {
286 av_log(avctx, AV_LOG_ERROR, "Got no sprites\n");
287 return AVERROR_UNKNOWN;
290 if (v->two_sprites && (!s->last_picture_ptr || !s->last_picture.f->data[0])) {
291 av_log(avctx, AV_LOG_WARNING, "Need two sprites, only got one\n");
295 av_frame_unref(v->sprite_output_frame);
296 if ((ret = ff_get_buffer(avctx, v->sprite_output_frame, 0)) < 0)
299 vc1_draw_sprites(v, &sd);
304 static void vc1_sprite_flush(AVCodecContext *avctx)
306 VC1Context *v = avctx->priv_data;
307 MpegEncContext *s = &v->s;
308 AVFrame *f = s->current_picture.f;
311 /* Windows Media Image codecs have a convergence interval of two keyframes.
312 Since we can't enforce it, clear to black the missing sprite. This is
313 wrong but it looks better than doing nothing. */
316 for (plane = 0; plane < (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY ? 1 : 3); plane++)
317 for (i = 0; i < v->sprite_height>>!!plane; i++)
318 memset(f->data[plane] + i * f->linesize[plane],
319 plane ? 128 : 0, f->linesize[plane]);
324 av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v)
326 MpegEncContext *s = &v->s;
328 int mb_height = FFALIGN(s->mb_height, 2);
330 /* Allocate mb bitplanes */
331 v->mv_type_mb_plane = av_malloc (s->mb_stride * mb_height);
332 v->direct_mb_plane = av_malloc (s->mb_stride * mb_height);
333 v->forward_mb_plane = av_malloc (s->mb_stride * mb_height);
334 v->fieldtx_plane = av_mallocz(s->mb_stride * mb_height);
335 v->acpred_plane = av_malloc (s->mb_stride * mb_height);
336 v->over_flags_plane = av_malloc (s->mb_stride * mb_height);
337 if (!v->mv_type_mb_plane || !v->direct_mb_plane || !v->forward_mb_plane ||
338 !v->fieldtx_plane || !v->acpred_plane || !v->over_flags_plane)
341 v->n_allocated_blks = s->mb_width + 2;
342 v->block = av_malloc(sizeof(*v->block) * v->n_allocated_blks);
343 v->cbp_base = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
344 if (!v->block || !v->cbp_base)
346 v->cbp = v->cbp_base + s->mb_stride;
347 v->ttblk_base = av_malloc(sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
350 v->ttblk = v->ttblk_base + s->mb_stride;
351 v->is_intra_base = av_mallocz(sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
352 if (!v->is_intra_base)
354 v->is_intra = v->is_intra_base + s->mb_stride;
355 v->luma_mv_base = av_mallocz(sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);
356 if (!v->luma_mv_base)
358 v->luma_mv = v->luma_mv_base + s->mb_stride;
360 /* allocate block type info in that way so it could be used with s->block_index[] */
361 v->mb_type_base = av_malloc(s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);
362 if (!v->mb_type_base)
364 v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;
365 v->mb_type[1] = v->mb_type_base + s->b8_stride * (mb_height * 2 + 1) + s->mb_stride + 1;
366 v->mb_type[2] = v->mb_type[1] + s->mb_stride * (mb_height + 1);
368 /* allocate memory to store block level MV info */
369 v->blk_mv_type_base = av_mallocz( s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);
370 if (!v->blk_mv_type_base)
372 v->blk_mv_type = v->blk_mv_type_base + s->b8_stride + 1;
373 v->mv_f_base = av_mallocz(2 * (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2));
376 v->mv_f[0] = v->mv_f_base + s->b8_stride + 1;
377 v->mv_f[1] = v->mv_f[0] + (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);
378 v->mv_f_next_base = av_mallocz(2 * (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2));
379 if (!v->mv_f_next_base)
381 v->mv_f_next[0] = v->mv_f_next_base + s->b8_stride + 1;
382 v->mv_f_next[1] = v->mv_f_next[0] + (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);
384 ff_intrax8_common_init(&v->x8,s);
386 if (s->avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || s->avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
387 for (i = 0; i < 4; i++)
388 if (!(v->sr_rows[i >> 1][i & 1] = av_malloc(v->output_width)))
389 return AVERROR(ENOMEM);
395 ff_vc1_decode_end(s->avctx);
396 return AVERROR(ENOMEM);
399 av_cold void ff_vc1_init_transposed_scantables(VC1Context *v)
402 for (i = 0; i < 64; i++) {
403 #define transpose(x) (((x) >> 3) | (((x) & 7) << 3))
404 v->zz_8x8[0][i] = transpose(ff_wmv1_scantable[0][i]);
405 v->zz_8x8[1][i] = transpose(ff_wmv1_scantable[1][i]);
406 v->zz_8x8[2][i] = transpose(ff_wmv1_scantable[2][i]);
407 v->zz_8x8[3][i] = transpose(ff_wmv1_scantable[3][i]);
408 v->zzi_8x8[i] = transpose(ff_vc1_adv_interlaced_8x8_zz[i]);
414 /** Initialize a VC1/WMV3 decoder
415 * @todo TODO: Handle VC-1 IDUs (Transport level?)
416 * @todo TODO: Decypher remaining bits in extra_data
418 static av_cold int vc1_decode_init(AVCodecContext *avctx)
420 VC1Context *v = avctx->priv_data;
421 MpegEncContext *s = &v->s;
425 /* save the container output size for WMImage */
426 v->output_width = avctx->width;
427 v->output_height = avctx->height;
429 if (!avctx->extradata_size || !avctx->extradata)
433 if ((ret = ff_vc1_init_common(v)) < 0)
436 if (avctx->codec_id == AV_CODEC_ID_WMV3 || avctx->codec_id == AV_CODEC_ID_WMV3IMAGE) {
439 // looks like WMV3 has a sequence header stored in the extradata
440 // advanced sequence header may be before the first frame
441 // the last byte of the extradata is a version number, 1 for the
442 // samples we can decode
444 init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);
446 if ((ret = ff_vc1_decode_sequence_header(avctx, v, &gb)) < 0)
449 count = avctx->extradata_size*8 - get_bits_count(&gb);
451 av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
452 count, get_bits_long(&gb, FFMIN(count, 32)));
453 } else if (count < 0) {
454 av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
456 } else { // VC1/WVC1/WVP2
457 const uint8_t *start = avctx->extradata;
458 uint8_t *end = avctx->extradata + avctx->extradata_size;
461 uint8_t *buf2 = NULL;
462 int seq_initialized = 0, ep_initialized = 0;
464 if (avctx->extradata_size < 16) {
465 av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);
469 buf2 = av_mallocz(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
471 return AVERROR(ENOMEM);
473 start = find_next_marker(start, end); // in WVC1 extradata first byte is its size, but can be 0 in mkv
475 for (; next < end; start = next) {
476 next = find_next_marker(start + 4, end);
477 size = next - start - 4;
480 buf2_size = vc1_unescape_buffer(start + 4, size, buf2);
481 init_get_bits(&gb, buf2, buf2_size * 8);
482 switch (AV_RB32(start)) {
483 case VC1_CODE_SEQHDR:
484 if ((ret = ff_vc1_decode_sequence_header(avctx, v, &gb)) < 0) {
490 case VC1_CODE_ENTRYPOINT:
491 if ((ret = ff_vc1_decode_entry_point(avctx, v, &gb)) < 0) {
500 if (!seq_initialized || !ep_initialized) {
501 av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");
504 v->res_sprite = (avctx->codec_id == AV_CODEC_ID_VC1IMAGE);
507 avctx->profile = v->profile;
508 if (v->profile == PROFILE_ADVANCED)
509 avctx->level = v->level;
511 if (!CONFIG_GRAY || !(avctx->flags & AV_CODEC_FLAG_GRAY))
512 avctx->pix_fmt = ff_get_format(avctx, avctx->codec->pix_fmts);
514 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
515 if (avctx->color_range == AVCOL_RANGE_UNSPECIFIED)
516 avctx->color_range = AVCOL_RANGE_MPEG;
519 // ensure static VLC tables are initialized
520 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
522 if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0)
524 // Hack to ensure the above functions will be called
525 // again once we know all necessary settings.
526 // That this is necessary might indicate a bug.
527 ff_vc1_decode_end(avctx);
529 ff_blockdsp_init(&s->bdsp, avctx);
530 ff_h264chroma_init(&v->h264chroma, 8);
531 ff_qpeldsp_init(&s->qdsp);
533 // Must happen after calling ff_vc1_decode_end
534 // to avoid de-allocating the sprite_output_frame
535 v->sprite_output_frame = av_frame_alloc();
536 if (!v->sprite_output_frame)
537 return AVERROR(ENOMEM);
539 avctx->has_b_frames = !!avctx->max_b_frames;
541 if (v->color_prim == 1 || v->color_prim == 5 || v->color_prim == 6)
542 avctx->color_primaries = v->color_prim;
543 if (v->transfer_char == 1 || v->transfer_char == 7)
544 avctx->color_trc = v->transfer_char;
545 if (v->matrix_coef == 1 || v->matrix_coef == 6 || v->matrix_coef == 7)
546 avctx->colorspace = v->matrix_coef;
548 s->mb_width = (avctx->coded_width + 15) >> 4;
549 s->mb_height = (avctx->coded_height + 15) >> 4;
551 if (v->profile == PROFILE_ADVANCED || v->res_fasttx) {
552 ff_vc1_init_transposed_scantables(v);
554 memcpy(v->zz_8x8, ff_wmv1_scantable, 4*64);
559 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
560 v->sprite_width = avctx->coded_width;
561 v->sprite_height = avctx->coded_height;
563 avctx->coded_width = avctx->width = v->output_width;
564 avctx->coded_height = avctx->height = v->output_height;
566 // prevent 16.16 overflows
567 if (v->sprite_width > 1 << 14 ||
568 v->sprite_height > 1 << 14 ||
569 v->output_width > 1 << 14 ||
570 v->output_height > 1 << 14) return -1;
572 if ((v->sprite_width&1) || (v->sprite_height&1)) {
573 avpriv_request_sample(avctx, "odd sprites support");
574 return AVERROR_PATCHWELCOME;
580 /** Close a VC1/WMV3 decoder
581 * @warning Initial try at using MpegEncContext stuff
583 av_cold int ff_vc1_decode_end(AVCodecContext *avctx)
585 VC1Context *v = avctx->priv_data;
588 av_frame_free(&v->sprite_output_frame);
590 for (i = 0; i < 4; i++)
591 av_freep(&v->sr_rows[i >> 1][i & 1]);
592 av_freep(&v->hrd_rate);
593 av_freep(&v->hrd_buffer);
594 ff_mpv_common_end(&v->s);
595 av_freep(&v->mv_type_mb_plane);
596 av_freep(&v->direct_mb_plane);
597 av_freep(&v->forward_mb_plane);
598 av_freep(&v->fieldtx_plane);
599 av_freep(&v->acpred_plane);
600 av_freep(&v->over_flags_plane);
601 av_freep(&v->mb_type_base);
602 av_freep(&v->blk_mv_type_base);
603 av_freep(&v->mv_f_base);
604 av_freep(&v->mv_f_next_base);
606 av_freep(&v->cbp_base);
607 av_freep(&v->ttblk_base);
608 av_freep(&v->is_intra_base); // FIXME use v->mb_type[]
609 av_freep(&v->luma_mv_base);
610 ff_intrax8_common_end(&v->x8);
615 /** Decode a VC1/WMV3 frame
616 * @todo TODO: Handle VC-1 IDUs (Transport level?)
618 static int vc1_decode_frame(AVCodecContext *avctx, void *data,
619 int *got_frame, AVPacket *avpkt)
621 const uint8_t *buf = avpkt->data;
622 int buf_size = avpkt->size, n_slices = 0, i, ret;
623 VC1Context *v = avctx->priv_data;
624 MpegEncContext *s = &v->s;
625 AVFrame *pict = data;
626 uint8_t *buf2 = NULL;
627 const uint8_t *buf_start = buf, *buf_start_second_field = NULL;
628 int mb_height, n_slices1=-1;
633 } *slices = NULL, *tmp;
637 if(s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
640 /* no supplementary picture */
641 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == VC1_CODE_ENDOFSEQ)) {
642 /* special case for last picture */
643 if (s->low_delay == 0 && s->next_picture_ptr) {
644 if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
646 s->next_picture_ptr = NULL;
655 if (s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU) {
656 if (v->profile < PROFILE_ADVANCED)
657 avctx->pix_fmt = AV_PIX_FMT_VDPAU_WMV3;
659 avctx->pix_fmt = AV_PIX_FMT_VDPAU_VC1;
663 //for advanced profile we may need to parse and unescape data
664 if (avctx->codec_id == AV_CODEC_ID_VC1 || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
666 buf2 = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
668 return AVERROR(ENOMEM);
670 if (IS_MARKER(AV_RB32(buf))) { /* frame starts with marker and needs to be parsed */
671 const uint8_t *start, *end, *next;
675 for (start = buf, end = buf + buf_size; next < end; start = next) {
676 next = find_next_marker(start + 4, end);
677 size = next - start - 4;
678 if (size <= 0) continue;
679 switch (AV_RB32(start)) {
683 || s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU
687 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
689 case VC1_CODE_FIELD: {
693 || s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU
696 buf_start_second_field = start;
697 tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
699 ret = AVERROR(ENOMEM);
703 slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
704 if (!slices[n_slices].buf) {
705 ret = AVERROR(ENOMEM);
708 buf_size3 = vc1_unescape_buffer(start + 4, size,
709 slices[n_slices].buf);
710 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
712 /* assuming that the field marker is at the exact middle,
714 slices[n_slices].mby_start = s->mb_height + 1 >> 1;
715 n_slices1 = n_slices - 1; // index of the last slice of the first field
719 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */
720 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
721 init_get_bits(&s->gb, buf2, buf_size2 * 8);
722 ff_vc1_decode_entry_point(avctx, v, &s->gb);
724 case VC1_CODE_SLICE: {
726 tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
728 ret = AVERROR(ENOMEM);
732 slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
733 if (!slices[n_slices].buf) {
734 ret = AVERROR(ENOMEM);
737 buf_size3 = vc1_unescape_buffer(start + 4, size,
738 slices[n_slices].buf);
739 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
741 slices[n_slices].mby_start = get_bits(&slices[n_slices].gb, 9);
747 } else if (v->interlace && ((buf[0] & 0xC0) == 0xC0)) { /* WVC1 interlaced stores both fields divided by marker */
748 const uint8_t *divider;
751 divider = find_next_marker(buf, buf + buf_size);
752 if ((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD) {
753 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");
754 ret = AVERROR_INVALIDDATA;
756 } else { // found field marker, unescape second field
759 || s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU
762 buf_start_second_field = divider;
763 tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
765 ret = AVERROR(ENOMEM);
769 slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
770 if (!slices[n_slices].buf) {
771 ret = AVERROR(ENOMEM);
774 buf_size3 = vc1_unescape_buffer(divider + 4, buf + buf_size - divider - 4, slices[n_slices].buf);
775 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
777 slices[n_slices].mby_start = s->mb_height + 1 >> 1;
778 n_slices1 = n_slices - 1;
781 buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);
783 buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);
785 init_get_bits(&s->gb, buf2, buf_size2*8);
787 init_get_bits(&s->gb, buf, buf_size*8);
790 v->new_sprite = !get_bits1(&s->gb);
791 v->two_sprites = get_bits1(&s->gb);
792 /* res_sprite means a Windows Media Image stream, AV_CODEC_ID_*IMAGE means
793 we're using the sprite compositor. These are intentionally kept separate
794 so you can get the raw sprites by using the wmv3 decoder for WMVP or
795 the vc1 one for WVP2 */
796 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
798 // switch AVCodecContext parameters to those of the sprites
799 avctx->width = avctx->coded_width = v->sprite_width;
800 avctx->height = avctx->coded_height = v->sprite_height;
807 if (s->context_initialized &&
808 (s->width != avctx->coded_width ||
809 s->height != avctx->coded_height)) {
810 ff_vc1_decode_end(avctx);
813 if (!s->context_initialized) {
814 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
816 if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0) {
817 ff_mpv_common_end(s);
821 s->low_delay = !avctx->has_b_frames || v->res_sprite;
823 if (v->profile == PROFILE_ADVANCED) {
824 if(avctx->coded_width<=1 || avctx->coded_height<=1) {
825 ret = AVERROR_INVALIDDATA;
828 s->h_edge_pos = avctx->coded_width;
829 s->v_edge_pos = avctx->coded_height;
833 // do parse frame header
834 v->pic_header_flag = 0;
835 v->first_pic_header_flag = 1;
836 if (v->profile < PROFILE_ADVANCED) {
837 if ((ret = ff_vc1_parse_frame_header(v, &s->gb)) < 0) {
841 if ((ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
845 v->first_pic_header_flag = 0;
847 if (avctx->debug & FF_DEBUG_PICT_INFO)
848 av_log(v->s.avctx, AV_LOG_DEBUG, "pict_type: %c\n", av_get_picture_type_char(s->pict_type));
850 if ((avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE)
851 && s->pict_type != AV_PICTURE_TYPE_I) {
852 av_log(v->s.avctx, AV_LOG_ERROR, "Sprite decoder: expected I-frame\n");
853 ret = AVERROR_INVALIDDATA;
857 if ((s->mb_height >> v->field_mode) == 0) {
858 av_log(v->s.avctx, AV_LOG_ERROR, "image too short\n");
859 ret = AVERROR_INVALIDDATA;
863 // for skipping the frame
864 s->current_picture.f->pict_type = s->pict_type;
865 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
867 /* skip B-frames if we don't have reference frames */
868 if (!s->last_picture_ptr && (s->pict_type == AV_PICTURE_TYPE_B || s->droppable)) {
869 av_log(v->s.avctx, AV_LOG_DEBUG, "Skipping B frame without reference frames\n");
872 if ((avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B) ||
873 (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I) ||
874 avctx->skip_frame >= AVDISCARD_ALL) {
878 if (s->next_p_frame_damaged) {
879 if (s->pict_type == AV_PICTURE_TYPE_B)
882 s->next_p_frame_damaged = 0;
885 if ((ret = ff_mpv_frame_start(s, avctx)) < 0) {
889 v->s.current_picture_ptr->field_picture = v->field_mode;
890 v->s.current_picture_ptr->f->interlaced_frame = (v->fcm != PROGRESSIVE);
891 v->s.current_picture_ptr->f->top_field_first = v->tff;
893 // process pulldown flags
894 s->current_picture_ptr->f->repeat_pict = 0;
895 // Pulldown flags are only valid when 'broadcast' has been set.
896 // So ticks_per_frame will be 2
899 s->current_picture_ptr->f->repeat_pict = 1;
900 } else if (v->rptfrm) {
902 s->current_picture_ptr->f->repeat_pict = v->rptfrm * 2;
905 s->me.qpel_put = s->qdsp.put_qpel_pixels_tab;
906 s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab;
909 if ((CONFIG_VC1_VDPAU_DECODER)
910 &&s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU) {
911 if (v->field_mode && buf_start_second_field) {
912 ff_vdpau_vc1_decode_picture(s, buf_start, buf_start_second_field - buf_start);
913 ff_vdpau_vc1_decode_picture(s, buf_start_second_field, (buf + buf_size) - buf_start_second_field);
915 ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);
919 if (avctx->hwaccel) {
920 if (v->field_mode && buf_start_second_field) {
921 // decode first field
922 s->picture_structure = PICT_BOTTOM_FIELD - v->tff;
923 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
925 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
927 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
930 // decode second field
931 s->gb = slices[n_slices1 + 1].gb;
932 s->picture_structure = PICT_TOP_FIELD + v->tff;
934 v->pic_header_flag = 0;
935 if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
936 av_log(avctx, AV_LOG_ERROR, "parsing header for second field failed");
937 ret = AVERROR_INVALIDDATA;
940 v->s.current_picture_ptr->f->pict_type = v->s.pict_type;
942 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
944 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
946 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
949 s->picture_structure = PICT_FRAME;
950 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
952 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
954 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
960 ff_mpeg_er_frame_start(s);
962 v->bits = buf_size * 8;
963 v->end_mb_x = s->mb_width;
965 s->current_picture.f->linesize[0] <<= 1;
966 s->current_picture.f->linesize[1] <<= 1;
967 s->current_picture.f->linesize[2] <<= 1;
971 mb_height = s->mb_height >> v->field_mode;
973 av_assert0 (mb_height > 0);
975 for (i = 0; i <= n_slices; i++) {
976 if (i > 0 && slices[i - 1].mby_start >= mb_height) {
977 if (v->field_mode <= 0) {
978 av_log(v->s.avctx, AV_LOG_ERROR, "Slice %d starts beyond "
979 "picture boundary (%d >= %d)\n", i,
980 slices[i - 1].mby_start, mb_height);
984 av_assert0((s->mb_height & 1) == 0);
985 v->blocks_off = s->b8_stride * (s->mb_height&~1);
986 v->mb_off = s->mb_stride * s->mb_height >> 1;
993 v->pic_header_flag = 0;
994 if (v->field_mode && i == n_slices1 + 2) {
995 if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
996 av_log(v->s.avctx, AV_LOG_ERROR, "Field header damaged\n");
997 ret = AVERROR_INVALIDDATA;
998 if (avctx->err_recognition & AV_EF_EXPLODE)
1002 } else if (get_bits1(&s->gb)) {
1003 v->pic_header_flag = 1;
1004 if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
1005 av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");
1006 ret = AVERROR_INVALIDDATA;
1007 if (avctx->err_recognition & AV_EF_EXPLODE)
1015 s->start_mb_y = (i == 0) ? 0 : FFMAX(0, slices[i-1].mby_start % mb_height);
1016 if (!v->field_mode || v->second_field)
1017 s->end_mb_y = (i == n_slices ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
1019 if (i >= n_slices) {
1020 av_log(v->s.avctx, AV_LOG_ERROR, "first field slice count too large\n");
1023 s->end_mb_y = (i <= n_slices1 + 1) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
1025 if (s->end_mb_y <= s->start_mb_y) {
1026 av_log(v->s.avctx, AV_LOG_ERROR, "end mb y %d %d invalid\n", s->end_mb_y, s->start_mb_y);
1029 if (!v->p_frame_skipped && s->pict_type != AV_PICTURE_TYPE_I && !v->cbpcy_vlc) {
1030 av_log(v->s.avctx, AV_LOG_ERROR, "missing cbpcy_vlc\n");
1033 ff_vc1_decode_blocks(v);
1035 s->gb = slices[i].gb;
1037 if (v->field_mode) {
1038 v->second_field = 0;
1039 s->current_picture.f->linesize[0] >>= 1;
1040 s->current_picture.f->linesize[1] >>= 1;
1041 s->current_picture.f->linesize[2] >>= 1;
1043 s->uvlinesize >>= 1;
1044 if (v->s.pict_type != AV_PICTURE_TYPE_BI && v->s.pict_type != AV_PICTURE_TYPE_B) {
1045 FFSWAP(uint8_t *, v->mv_f_next[0], v->mv_f[0]);
1046 FFSWAP(uint8_t *, v->mv_f_next[1], v->mv_f[1]);
1049 ff_dlog(s->avctx, "Consumed %i/%i bits\n",
1050 get_bits_count(&s->gb), s->gb.size_in_bits);
1051 // if (get_bits_count(&s->gb) > buf_size * 8)
1053 if(s->er.error_occurred && s->pict_type == AV_PICTURE_TYPE_B) {
1054 ret = AVERROR_INVALIDDATA;
1058 ff_er_frame_end(&s->er);
1061 ff_mpv_frame_end(s);
1063 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
1065 avctx->width = avctx->coded_width = v->output_width;
1066 avctx->height = avctx->coded_height = v->output_height;
1067 if (avctx->skip_frame >= AVDISCARD_NONREF)
1069 #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
1070 if ((ret = vc1_decode_sprites(v, &s->gb)) < 0)
1073 if ((ret = av_frame_ref(pict, v->sprite_output_frame)) < 0)
1077 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1078 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
1080 ff_print_debug_info(s, s->current_picture_ptr, pict);
1082 } else if (s->last_picture_ptr) {
1083 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
1085 ff_print_debug_info(s, s->last_picture_ptr, pict);
1092 for (i = 0; i < n_slices; i++)
1093 av_free(slices[i].buf);
1099 for (i = 0; i < n_slices; i++)
1100 av_free(slices[i].buf);
1106 static const enum AVPixelFormat vc1_hwaccel_pixfmt_list_420[] = {
1107 #if CONFIG_VC1_DXVA2_HWACCEL
1108 AV_PIX_FMT_DXVA2_VLD,
1110 #if CONFIG_VC1_D3D11VA_HWACCEL
1111 AV_PIX_FMT_D3D11VA_VLD,
1113 #if CONFIG_VC1_VAAPI_HWACCEL
1116 #if CONFIG_VC1_VDPAU_HWACCEL
1123 AVCodec ff_vc1_decoder = {
1125 .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),
1126 .type = AVMEDIA_TYPE_VIDEO,
1127 .id = AV_CODEC_ID_VC1,
1128 .priv_data_size = sizeof(VC1Context),
1129 .init = vc1_decode_init,
1130 .close = ff_vc1_decode_end,
1131 .decode = vc1_decode_frame,
1132 .flush = ff_mpeg_flush,
1133 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1134 .pix_fmts = vc1_hwaccel_pixfmt_list_420,
1135 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1138 #if CONFIG_WMV3_DECODER
1139 AVCodec ff_wmv3_decoder = {
1141 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),
1142 .type = AVMEDIA_TYPE_VIDEO,
1143 .id = AV_CODEC_ID_WMV3,
1144 .priv_data_size = sizeof(VC1Context),
1145 .init = vc1_decode_init,
1146 .close = ff_vc1_decode_end,
1147 .decode = vc1_decode_frame,
1148 .flush = ff_mpeg_flush,
1149 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1150 .pix_fmts = vc1_hwaccel_pixfmt_list_420,
1151 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1155 #if CONFIG_WMV3_VDPAU_DECODER && FF_API_VDPAU
1156 AVCodec ff_wmv3_vdpau_decoder = {
1157 .name = "wmv3_vdpau",
1158 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),
1159 .type = AVMEDIA_TYPE_VIDEO,
1160 .id = AV_CODEC_ID_WMV3,
1161 .priv_data_size = sizeof(VC1Context),
1162 .init = vc1_decode_init,
1163 .close = ff_vc1_decode_end,
1164 .decode = vc1_decode_frame,
1165 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HWACCEL_VDPAU,
1166 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_WMV3, AV_PIX_FMT_NONE },
1167 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1171 #if CONFIG_VC1_VDPAU_DECODER && FF_API_VDPAU
1172 AVCodec ff_vc1_vdpau_decoder = {
1173 .name = "vc1_vdpau",
1174 .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),
1175 .type = AVMEDIA_TYPE_VIDEO,
1176 .id = AV_CODEC_ID_VC1,
1177 .priv_data_size = sizeof(VC1Context),
1178 .init = vc1_decode_init,
1179 .close = ff_vc1_decode_end,
1180 .decode = vc1_decode_frame,
1181 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HWACCEL_VDPAU,
1182 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_VC1, AV_PIX_FMT_NONE },
1183 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1187 #if CONFIG_WMV3IMAGE_DECODER
1188 AVCodec ff_wmv3image_decoder = {
1189 .name = "wmv3image",
1190 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image"),
1191 .type = AVMEDIA_TYPE_VIDEO,
1192 .id = AV_CODEC_ID_WMV3IMAGE,
1193 .priv_data_size = sizeof(VC1Context),
1194 .init = vc1_decode_init,
1195 .close = ff_vc1_decode_end,
1196 .decode = vc1_decode_frame,
1197 .capabilities = AV_CODEC_CAP_DR1,
1198 .flush = vc1_sprite_flush,
1199 .pix_fmts = (const enum AVPixelFormat[]) {
1206 #if CONFIG_VC1IMAGE_DECODER
1207 AVCodec ff_vc1image_decoder = {
1209 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image v2"),
1210 .type = AVMEDIA_TYPE_VIDEO,
1211 .id = AV_CODEC_ID_VC1IMAGE,
1212 .priv_data_size = sizeof(VC1Context),
1213 .init = vc1_decode_init,
1214 .close = ff_vc1_decode_end,
1215 .decode = vc1_decode_frame,
1216 .capabilities = AV_CODEC_CAP_DR1,
1217 .flush = vc1_sprite_flush,
1218 .pix_fmts = (const enum AVPixelFormat[]) {