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
35 #include "mpegvideo.h"
37 #include "msmpeg4data.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;
327 int i, ret = AVERROR(ENOMEM);
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]) * 3 * s->mb_stride);
344 if (!v->block || !v->cbp_base)
346 v->cbp = v->cbp_base + 2 * s->mb_stride;
347 v->ttblk_base = av_malloc(sizeof(v->ttblk_base[0]) * 3 * s->mb_stride);
350 v->ttblk = v->ttblk_base + 2 * s->mb_stride;
351 v->is_intra_base = av_mallocz(sizeof(v->is_intra_base[0]) * 3 * s->mb_stride);
352 if (!v->is_intra_base)
354 v->is_intra = v->is_intra_base + 2 * s->mb_stride;
355 v->luma_mv_base = av_mallocz(sizeof(v->luma_mv_base[0]) * 3 * s->mb_stride);
356 if (!v->luma_mv_base)
358 v->luma_mv = v->luma_mv_base + 2 * 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 if (s->avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || s->avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
385 for (i = 0; i < 4; i++)
386 if (!(v->sr_rows[i >> 1][i & 1] = av_malloc(v->output_width)))
390 ret = ff_intrax8_common_init(s->avctx, &v->x8, &s->idsp,
391 s->block, s->block_last_index,
392 s->mb_width, s->mb_height);
399 ff_vc1_decode_end(s->avctx);
403 av_cold void ff_vc1_init_transposed_scantables(VC1Context *v)
406 for (i = 0; i < 64; i++) {
407 #define transpose(x) (((x) >> 3) | (((x) & 7) << 3))
408 v->zz_8x8[0][i] = transpose(ff_wmv1_scantable[0][i]);
409 v->zz_8x8[1][i] = transpose(ff_wmv1_scantable[1][i]);
410 v->zz_8x8[2][i] = transpose(ff_wmv1_scantable[2][i]);
411 v->zz_8x8[3][i] = transpose(ff_wmv1_scantable[3][i]);
412 v->zzi_8x8[i] = transpose(ff_vc1_adv_interlaced_8x8_zz[i]);
418 /** Initialize a VC1/WMV3 decoder
419 * @todo TODO: Handle VC-1 IDUs (Transport level?)
420 * @todo TODO: Decipher remaining bits in extra_data
422 static av_cold int vc1_decode_init(AVCodecContext *avctx)
424 VC1Context *v = avctx->priv_data;
425 MpegEncContext *s = &v->s;
429 /* save the container output size for WMImage */
430 v->output_width = avctx->width;
431 v->output_height = avctx->height;
433 if (!avctx->extradata_size || !avctx->extradata)
434 return AVERROR_INVALIDDATA;
437 ff_vc1_init_common(v);
439 if (avctx->codec_id == AV_CODEC_ID_WMV3 || avctx->codec_id == AV_CODEC_ID_WMV3IMAGE) {
442 // looks like WMV3 has a sequence header stored in the extradata
443 // advanced sequence header may be before the first frame
444 // the last byte of the extradata is a version number, 1 for the
445 // samples we can decode
447 init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);
449 if ((ret = ff_vc1_decode_sequence_header(avctx, v, &gb)) < 0)
452 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE && !v->res_sprite) {
453 avpriv_request_sample(avctx, "Non sprite WMV3IMAGE");
454 return AVERROR_PATCHWELCOME;
457 count = avctx->extradata_size*8 - get_bits_count(&gb);
459 av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
460 count, get_bits_long(&gb, FFMIN(count, 32)));
461 } else if (count < 0) {
462 av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
464 } else { // VC1/WVC1/WVP2
465 const uint8_t *start = avctx->extradata;
466 uint8_t *end = avctx->extradata + avctx->extradata_size;
469 uint8_t *buf2 = NULL;
470 int seq_initialized = 0, ep_initialized = 0;
472 if (avctx->extradata_size < 16) {
473 av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);
474 return AVERROR_INVALIDDATA;
477 buf2 = av_mallocz(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
479 return AVERROR(ENOMEM);
481 start = find_next_marker(start, end); // in WVC1 extradata first byte is its size, but can be 0 in mkv
483 for (; next < end; start = next) {
484 next = find_next_marker(start + 4, end);
485 size = next - start - 4;
488 buf2_size = vc1_unescape_buffer(start + 4, size, buf2);
489 init_get_bits(&gb, buf2, buf2_size * 8);
490 switch (AV_RB32(start)) {
491 case VC1_CODE_SEQHDR:
492 if ((ret = ff_vc1_decode_sequence_header(avctx, v, &gb)) < 0) {
498 case VC1_CODE_ENTRYPOINT:
499 if ((ret = ff_vc1_decode_entry_point(avctx, v, &gb)) < 0) {
508 if (!seq_initialized || !ep_initialized) {
509 av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");
510 return AVERROR_INVALIDDATA;
512 v->res_sprite = (avctx->codec_id == AV_CODEC_ID_VC1IMAGE);
515 avctx->profile = v->profile;
516 if (v->profile == PROFILE_ADVANCED)
517 avctx->level = v->level;
519 if (!CONFIG_GRAY || !(avctx->flags & AV_CODEC_FLAG_GRAY))
520 avctx->pix_fmt = ff_get_format(avctx, avctx->codec->pix_fmts);
522 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
523 if (avctx->color_range == AVCOL_RANGE_UNSPECIFIED)
524 avctx->color_range = AVCOL_RANGE_MPEG;
527 // ensure static VLC tables are initialized
528 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
530 if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0)
532 // Hack to ensure the above functions will be called
533 // again once we know all necessary settings.
534 // That this is necessary might indicate a bug.
535 ff_vc1_decode_end(avctx);
537 ff_blockdsp_init(&s->bdsp, avctx);
538 ff_h264chroma_init(&v->h264chroma, 8);
539 ff_qpeldsp_init(&s->qdsp);
541 avctx->has_b_frames = !!avctx->max_b_frames;
543 if (v->color_prim == 1 || v->color_prim == 5 || v->color_prim == 6)
544 avctx->color_primaries = v->color_prim;
545 if (v->transfer_char == 1 || v->transfer_char == 7)
546 avctx->color_trc = v->transfer_char;
547 if (v->matrix_coef == 1 || v->matrix_coef == 6 || v->matrix_coef == 7)
548 avctx->colorspace = v->matrix_coef;
550 s->mb_width = (avctx->coded_width + 15) >> 4;
551 s->mb_height = (avctx->coded_height + 15) >> 4;
553 if (v->profile == PROFILE_ADVANCED || v->res_fasttx) {
554 ff_vc1_init_transposed_scantables(v);
556 memcpy(v->zz_8x8, ff_wmv1_scantable, 4*64);
561 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
562 v->sprite_width = avctx->coded_width;
563 v->sprite_height = avctx->coded_height;
565 avctx->coded_width = avctx->width = v->output_width;
566 avctx->coded_height = avctx->height = v->output_height;
568 // prevent 16.16 overflows
569 if (v->sprite_width > 1 << 14 ||
570 v->sprite_height > 1 << 14 ||
571 v->output_width > 1 << 14 ||
572 v->output_height > 1 << 14) {
573 return AVERROR_INVALIDDATA;
576 if ((v->sprite_width&1) || (v->sprite_height&1)) {
577 avpriv_request_sample(avctx, "odd sprites support");
578 return AVERROR_PATCHWELCOME;
584 /** Close a VC1/WMV3 decoder
585 * @warning Initial try at using MpegEncContext stuff
587 av_cold int ff_vc1_decode_end(AVCodecContext *avctx)
589 VC1Context *v = avctx->priv_data;
592 av_frame_free(&v->sprite_output_frame);
594 for (i = 0; i < 4; i++)
595 av_freep(&v->sr_rows[i >> 1][i & 1]);
596 av_freep(&v->hrd_rate);
597 av_freep(&v->hrd_buffer);
598 ff_mpv_common_end(&v->s);
599 av_freep(&v->mv_type_mb_plane);
600 av_freep(&v->direct_mb_plane);
601 av_freep(&v->forward_mb_plane);
602 av_freep(&v->fieldtx_plane);
603 av_freep(&v->acpred_plane);
604 av_freep(&v->over_flags_plane);
605 av_freep(&v->mb_type_base);
606 av_freep(&v->blk_mv_type_base);
607 av_freep(&v->mv_f_base);
608 av_freep(&v->mv_f_next_base);
610 av_freep(&v->cbp_base);
611 av_freep(&v->ttblk_base);
612 av_freep(&v->is_intra_base); // FIXME use v->mb_type[]
613 av_freep(&v->luma_mv_base);
614 ff_intrax8_common_end(&v->x8);
619 /** Decode a VC1/WMV3 frame
620 * @todo TODO: Handle VC-1 IDUs (Transport level?)
622 static int vc1_decode_frame(AVCodecContext *avctx, void *data,
623 int *got_frame, AVPacket *avpkt)
625 const uint8_t *buf = avpkt->data;
626 int buf_size = avpkt->size, n_slices = 0, i, ret;
627 VC1Context *v = avctx->priv_data;
628 MpegEncContext *s = &v->s;
629 AVFrame *pict = data;
630 uint8_t *buf2 = NULL;
631 const uint8_t *buf_start = buf, *buf_start_second_field = NULL;
632 int mb_height, n_slices1=-1;
637 const uint8_t *rawbuf;
639 } *slices = NULL, *tmp;
643 if(s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
646 /* no supplementary picture */
647 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == VC1_CODE_ENDOFSEQ)) {
648 /* special case for last picture */
649 if (s->low_delay == 0 && s->next_picture_ptr) {
650 if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
652 s->next_picture_ptr = NULL;
660 //for advanced profile we may need to parse and unescape data
661 if (avctx->codec_id == AV_CODEC_ID_VC1 || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
663 buf2 = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
665 return AVERROR(ENOMEM);
667 if (IS_MARKER(AV_RB32(buf))) { /* frame starts with marker and needs to be parsed */
668 const uint8_t *start, *end, *next;
672 for (start = buf, end = buf + buf_size; next < end; start = next) {
673 next = find_next_marker(start + 4, end);
674 size = next - start - 4;
675 if (size <= 0) continue;
676 switch (AV_RB32(start)) {
680 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
682 case VC1_CODE_FIELD: {
685 buf_start_second_field = start;
686 tmp = av_realloc_array(slices, sizeof(*slices), n_slices+1);
688 ret = AVERROR(ENOMEM);
692 slices[n_slices].buf = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
693 if (!slices[n_slices].buf) {
694 ret = AVERROR(ENOMEM);
697 buf_size3 = vc1_unescape_buffer(start + 4, size,
698 slices[n_slices].buf);
699 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
701 slices[n_slices].mby_start = avctx->coded_height + 31 >> 5;
702 slices[n_slices].rawbuf = start;
703 slices[n_slices].raw_size = size + 4;
704 n_slices1 = n_slices - 1; // index of the last slice of the first field
708 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */
709 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
710 init_get_bits(&s->gb, buf2, buf_size2 * 8);
711 ff_vc1_decode_entry_point(avctx, v, &s->gb);
713 case VC1_CODE_SLICE: {
715 tmp = av_realloc_array(slices, sizeof(*slices), n_slices+1);
717 ret = AVERROR(ENOMEM);
721 slices[n_slices].buf = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
722 if (!slices[n_slices].buf) {
723 ret = AVERROR(ENOMEM);
726 buf_size3 = vc1_unescape_buffer(start + 4, size,
727 slices[n_slices].buf);
728 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
730 slices[n_slices].mby_start = get_bits(&slices[n_slices].gb, 9);
731 slices[n_slices].rawbuf = start;
732 slices[n_slices].raw_size = size + 4;
738 } else if (v->interlace && ((buf[0] & 0xC0) == 0xC0)) { /* WVC1 interlaced stores both fields divided by marker */
739 const uint8_t *divider;
742 divider = find_next_marker(buf, buf + buf_size);
743 if ((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD) {
744 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");
745 ret = AVERROR_INVALIDDATA;
747 } else { // found field marker, unescape second field
749 buf_start_second_field = divider;
750 tmp = av_realloc_array(slices, sizeof(*slices), n_slices+1);
752 ret = AVERROR(ENOMEM);
756 slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
757 if (!slices[n_slices].buf) {
758 ret = AVERROR(ENOMEM);
761 buf_size3 = vc1_unescape_buffer(divider + 4, buf + buf_size - divider - 4, slices[n_slices].buf);
762 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
764 slices[n_slices].mby_start = s->mb_height + 1 >> 1;
765 slices[n_slices].rawbuf = divider;
766 slices[n_slices].raw_size = buf + buf_size - divider;
767 n_slices1 = n_slices - 1;
770 buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);
772 buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);
774 init_get_bits(&s->gb, buf2, buf_size2*8);
776 init_get_bits(&s->gb, buf, buf_size*8);
779 v->new_sprite = !get_bits1(&s->gb);
780 v->two_sprites = get_bits1(&s->gb);
781 /* res_sprite means a Windows Media Image stream, AV_CODEC_ID_*IMAGE means
782 we're using the sprite compositor. These are intentionally kept separate
783 so you can get the raw sprites by using the wmv3 decoder for WMVP or
784 the vc1 one for WVP2 */
785 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
787 // switch AVCodecContext parameters to those of the sprites
788 avctx->width = avctx->coded_width = v->sprite_width;
789 avctx->height = avctx->coded_height = v->sprite_height;
796 if (s->context_initialized &&
797 (s->width != avctx->coded_width ||
798 s->height != avctx->coded_height)) {
799 ff_vc1_decode_end(avctx);
802 if (!s->context_initialized) {
803 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
805 if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0) {
806 ff_mpv_common_end(s);
810 s->low_delay = !avctx->has_b_frames || v->res_sprite;
812 if (v->profile == PROFILE_ADVANCED) {
813 if(avctx->coded_width<=1 || avctx->coded_height<=1) {
814 ret = AVERROR_INVALIDDATA;
817 s->h_edge_pos = avctx->coded_width;
818 s->v_edge_pos = avctx->coded_height;
822 // do parse frame header
823 v->pic_header_flag = 0;
824 v->first_pic_header_flag = 1;
825 if (v->profile < PROFILE_ADVANCED) {
826 if ((ret = ff_vc1_parse_frame_header(v, &s->gb)) < 0) {
830 if ((ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
834 v->first_pic_header_flag = 0;
836 if (avctx->debug & FF_DEBUG_PICT_INFO)
837 av_log(v->s.avctx, AV_LOG_DEBUG, "pict_type: %c\n", av_get_picture_type_char(s->pict_type));
839 if ((avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE)
840 && s->pict_type != AV_PICTURE_TYPE_I) {
841 av_log(v->s.avctx, AV_LOG_ERROR, "Sprite decoder: expected I-frame\n");
842 ret = AVERROR_INVALIDDATA;
845 if ((avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE)
847 av_log(v->s.avctx, AV_LOG_ERROR, "Sprite decoder: expected Frames not Fields\n");
848 ret = AVERROR_INVALIDDATA;
851 if ((s->mb_height >> v->field_mode) == 0) {
852 av_log(v->s.avctx, AV_LOG_ERROR, "image too short\n");
853 ret = AVERROR_INVALIDDATA;
857 // for skipping the frame
858 s->current_picture.f->pict_type = s->pict_type;
859 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
861 /* skip B-frames if we don't have reference frames */
862 if (!s->last_picture_ptr && (s->pict_type == AV_PICTURE_TYPE_B || s->droppable)) {
863 av_log(v->s.avctx, AV_LOG_DEBUG, "Skipping B frame without reference frames\n");
866 if ((avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B) ||
867 (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I) ||
868 avctx->skip_frame >= AVDISCARD_ALL) {
872 if (s->next_p_frame_damaged) {
873 if (s->pict_type == AV_PICTURE_TYPE_B)
876 s->next_p_frame_damaged = 0;
879 if ((ret = ff_mpv_frame_start(s, avctx)) < 0) {
883 v->s.current_picture_ptr->field_picture = v->field_mode;
884 v->s.current_picture_ptr->f->interlaced_frame = (v->fcm != PROGRESSIVE);
885 v->s.current_picture_ptr->f->top_field_first = v->tff;
887 // process pulldown flags
888 s->current_picture_ptr->f->repeat_pict = 0;
889 // Pulldown flags are only valid when 'broadcast' has been set.
890 // So ticks_per_frame will be 2
893 s->current_picture_ptr->f->repeat_pict = 1;
894 } else if (v->rptfrm) {
896 s->current_picture_ptr->f->repeat_pict = v->rptfrm * 2;
899 s->me.qpel_put = s->qdsp.put_qpel_pixels_tab;
900 s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab;
902 if (avctx->hwaccel) {
904 if (v->field_mode && buf_start_second_field) {
905 // decode first field
906 s->picture_structure = PICT_BOTTOM_FIELD - v->tff;
907 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
910 if (n_slices1 == -1) {
911 // no slices, decode the field as-is
912 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
915 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, slices[0].rawbuf - buf_start)) < 0)
918 for (i = 0 ; i < n_slices1 + 1; i++) {
919 s->gb = slices[i].gb;
920 s->mb_y = slices[i].mby_start;
922 v->pic_header_flag = get_bits1(&s->gb);
923 if (v->pic_header_flag) {
924 if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
925 av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");
926 ret = AVERROR_INVALIDDATA;
927 if (avctx->err_recognition & AV_EF_EXPLODE)
933 if ((ret = avctx->hwaccel->decode_slice(avctx, slices[i].rawbuf, slices[i].raw_size)) < 0)
938 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
941 // decode second field
942 s->gb = slices[n_slices1 + 1].gb;
943 s->mb_y = slices[n_slices1 + 1].mby_start;
944 s->picture_structure = PICT_TOP_FIELD + v->tff;
946 v->pic_header_flag = 0;
947 if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
948 av_log(avctx, AV_LOG_ERROR, "parsing header for second field failed");
949 ret = AVERROR_INVALIDDATA;
952 v->s.current_picture_ptr->f->pict_type = v->s.pict_type;
954 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
957 if (n_slices - n_slices1 == 2) {
958 // no slices, decode the field as-is
959 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
962 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start_second_field, slices[n_slices1 + 2].rawbuf - buf_start_second_field)) < 0)
965 for (i = n_slices1 + 2; i < n_slices; i++) {
966 s->gb = slices[i].gb;
967 s->mb_y = slices[i].mby_start;
969 v->pic_header_flag = get_bits1(&s->gb);
970 if (v->pic_header_flag) {
971 if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
972 av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");
973 ret = AVERROR_INVALIDDATA;
974 if (avctx->err_recognition & AV_EF_EXPLODE)
980 if ((ret = avctx->hwaccel->decode_slice(avctx, slices[i].rawbuf, slices[i].raw_size)) < 0)
985 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
988 s->picture_structure = PICT_FRAME;
989 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
993 // no slices, decode the frame as-is
994 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
997 // decode the frame part as the first slice
998 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, slices[0].rawbuf - buf_start)) < 0)
1001 // and process the slices as additional slices afterwards
1002 for (i = 0 ; i < n_slices; i++) {
1003 s->gb = slices[i].gb;
1004 s->mb_y = slices[i].mby_start;
1006 v->pic_header_flag = get_bits1(&s->gb);
1007 if (v->pic_header_flag) {
1008 if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
1009 av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");
1010 ret = AVERROR_INVALIDDATA;
1011 if (avctx->err_recognition & AV_EF_EXPLODE)
1017 if ((ret = avctx->hwaccel->decode_slice(avctx, slices[i].rawbuf, slices[i].raw_size)) < 0)
1021 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
1027 ff_mpeg_er_frame_start(s);
1029 v->end_mb_x = s->mb_width;
1030 if (v->field_mode) {
1031 s->current_picture.f->linesize[0] <<= 1;
1032 s->current_picture.f->linesize[1] <<= 1;
1033 s->current_picture.f->linesize[2] <<= 1;
1035 s->uvlinesize <<= 1;
1037 mb_height = s->mb_height >> v->field_mode;
1039 av_assert0 (mb_height > 0);
1041 for (i = 0; i <= n_slices; i++) {
1042 if (i > 0 && slices[i - 1].mby_start >= mb_height) {
1043 if (v->field_mode <= 0) {
1044 av_log(v->s.avctx, AV_LOG_ERROR, "Slice %d starts beyond "
1045 "picture boundary (%d >= %d)\n", i,
1046 slices[i - 1].mby_start, mb_height);
1049 v->second_field = 1;
1050 av_assert0((s->mb_height & 1) == 0);
1051 v->blocks_off = s->b8_stride * (s->mb_height&~1);
1052 v->mb_off = s->mb_stride * s->mb_height >> 1;
1054 v->second_field = 0;
1059 v->pic_header_flag = 0;
1060 if (v->field_mode && i == n_slices1 + 2) {
1061 if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
1062 av_log(v->s.avctx, AV_LOG_ERROR, "Field header damaged\n");
1063 ret = AVERROR_INVALIDDATA;
1064 if (avctx->err_recognition & AV_EF_EXPLODE)
1068 } else if (get_bits1(&s->gb)) {
1069 v->pic_header_flag = 1;
1070 if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
1071 av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");
1072 ret = AVERROR_INVALIDDATA;
1073 if (avctx->err_recognition & AV_EF_EXPLODE)
1081 s->start_mb_y = (i == 0) ? 0 : FFMAX(0, slices[i-1].mby_start % mb_height);
1082 if (!v->field_mode || v->second_field)
1083 s->end_mb_y = (i == n_slices ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
1085 if (i >= n_slices) {
1086 av_log(v->s.avctx, AV_LOG_ERROR, "first field slice count too large\n");
1089 s->end_mb_y = (i == n_slices1 + 1) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
1091 if (s->end_mb_y <= s->start_mb_y) {
1092 av_log(v->s.avctx, AV_LOG_ERROR, "end mb y %d %d invalid\n", s->end_mb_y, s->start_mb_y);
1095 if (((s->pict_type == AV_PICTURE_TYPE_P && !v->p_frame_skipped) ||
1096 (s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type)) &&
1098 av_log(v->s.avctx, AV_LOG_ERROR, "missing cbpcy_vlc\n");
1101 ff_vc1_decode_blocks(v);
1102 if (i != n_slices) {
1103 s->gb = slices[i].gb;
1106 if (v->field_mode) {
1107 v->second_field = 0;
1108 s->current_picture.f->linesize[0] >>= 1;
1109 s->current_picture.f->linesize[1] >>= 1;
1110 s->current_picture.f->linesize[2] >>= 1;
1112 s->uvlinesize >>= 1;
1113 if (v->s.pict_type != AV_PICTURE_TYPE_BI && v->s.pict_type != AV_PICTURE_TYPE_B) {
1114 FFSWAP(uint8_t *, v->mv_f_next[0], v->mv_f[0]);
1115 FFSWAP(uint8_t *, v->mv_f_next[1], v->mv_f[1]);
1118 ff_dlog(s->avctx, "Consumed %i/%i bits\n",
1119 get_bits_count(&s->gb), s->gb.size_in_bits);
1120 // if (get_bits_count(&s->gb) > buf_size * 8)
1122 if(s->er.error_occurred && s->pict_type == AV_PICTURE_TYPE_B) {
1123 ret = AVERROR_INVALIDDATA;
1127 ff_er_frame_end(&s->er);
1130 ff_mpv_frame_end(s);
1132 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
1134 avctx->width = avctx->coded_width = v->output_width;
1135 avctx->height = avctx->coded_height = v->output_height;
1136 if (avctx->skip_frame >= AVDISCARD_NONREF)
1138 if (!v->sprite_output_frame &&
1139 !(v->sprite_output_frame = av_frame_alloc())) {
1140 ret = AVERROR(ENOMEM);
1143 #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
1144 if ((ret = vc1_decode_sprites(v, &s->gb)) < 0)
1147 if ((ret = av_frame_ref(pict, v->sprite_output_frame)) < 0)
1151 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1152 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
1154 ff_print_debug_info(s, s->current_picture_ptr, pict);
1156 } else if (s->last_picture_ptr) {
1157 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
1159 ff_print_debug_info(s, s->last_picture_ptr, pict);
1166 for (i = 0; i < n_slices; i++)
1167 av_free(slices[i].buf);
1173 for (i = 0; i < n_slices; i++)
1174 av_free(slices[i].buf);
1180 static const enum AVPixelFormat vc1_hwaccel_pixfmt_list_420[] = {
1181 #if CONFIG_VC1_DXVA2_HWACCEL
1182 AV_PIX_FMT_DXVA2_VLD,
1184 #if CONFIG_VC1_D3D11VA_HWACCEL
1185 AV_PIX_FMT_D3D11VA_VLD,
1188 #if CONFIG_VC1_NVDEC_HWACCEL
1191 #if CONFIG_VC1_VAAPI_HWACCEL
1194 #if CONFIG_VC1_VDPAU_HWACCEL
1201 AVCodec ff_vc1_decoder = {
1203 .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),
1204 .type = AVMEDIA_TYPE_VIDEO,
1205 .id = AV_CODEC_ID_VC1,
1206 .priv_data_size = sizeof(VC1Context),
1207 .init = vc1_decode_init,
1208 .close = ff_vc1_decode_end,
1209 .decode = vc1_decode_frame,
1210 .flush = ff_mpeg_flush,
1211 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1212 .pix_fmts = vc1_hwaccel_pixfmt_list_420,
1213 .hw_configs = (const AVCodecHWConfigInternal *const []) {
1214 #if CONFIG_VC1_DXVA2_HWACCEL
1217 #if CONFIG_VC1_D3D11VA_HWACCEL
1218 HWACCEL_D3D11VA(vc1),
1220 #if CONFIG_VC1_D3D11VA2_HWACCEL
1221 HWACCEL_D3D11VA2(vc1),
1223 #if CONFIG_VC1_NVDEC_HWACCEL
1226 #if CONFIG_VC1_VAAPI_HWACCEL
1229 #if CONFIG_VC1_VDPAU_HWACCEL
1234 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1237 #if CONFIG_WMV3_DECODER
1238 AVCodec ff_wmv3_decoder = {
1240 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),
1241 .type = AVMEDIA_TYPE_VIDEO,
1242 .id = AV_CODEC_ID_WMV3,
1243 .priv_data_size = sizeof(VC1Context),
1244 .init = vc1_decode_init,
1245 .close = ff_vc1_decode_end,
1246 .decode = vc1_decode_frame,
1247 .flush = ff_mpeg_flush,
1248 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1249 .pix_fmts = vc1_hwaccel_pixfmt_list_420,
1250 .hw_configs = (const AVCodecHWConfigInternal *const []) {
1251 #if CONFIG_WMV3_DXVA2_HWACCEL
1252 HWACCEL_DXVA2(wmv3),
1254 #if CONFIG_WMV3_D3D11VA_HWACCEL
1255 HWACCEL_D3D11VA(wmv3),
1257 #if CONFIG_WMV3_D3D11VA2_HWACCEL
1258 HWACCEL_D3D11VA2(wmv3),
1260 #if CONFIG_WMV3_NVDEC_HWACCEL
1261 HWACCEL_NVDEC(wmv3),
1263 #if CONFIG_WMV3_VAAPI_HWACCEL
1264 HWACCEL_VAAPI(wmv3),
1266 #if CONFIG_WMV3_VDPAU_HWACCEL
1267 HWACCEL_VDPAU(wmv3),
1271 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1275 #if CONFIG_WMV3IMAGE_DECODER
1276 AVCodec ff_wmv3image_decoder = {
1277 .name = "wmv3image",
1278 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image"),
1279 .type = AVMEDIA_TYPE_VIDEO,
1280 .id = AV_CODEC_ID_WMV3IMAGE,
1281 .priv_data_size = sizeof(VC1Context),
1282 .init = vc1_decode_init,
1283 .close = ff_vc1_decode_end,
1284 .decode = vc1_decode_frame,
1285 .capabilities = AV_CODEC_CAP_DR1,
1286 .flush = vc1_sprite_flush,
1287 .pix_fmts = (const enum AVPixelFormat[]) {
1294 #if CONFIG_VC1IMAGE_DECODER
1295 AVCodec ff_vc1image_decoder = {
1297 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image v2"),
1298 .type = AVMEDIA_TYPE_VIDEO,
1299 .id = AV_CODEC_ID_VC1IMAGE,
1300 .priv_data_size = sizeof(VC1Context),
1301 .init = vc1_decode_init,
1302 .close = ff_vc1_decode_end,
1303 .decode = vc1_decode_frame,
1304 .capabilities = AV_CODEC_CAP_DR1,
1305 .flush = vc1_sprite_flush,
1306 .pix_fmts = (const enum AVPixelFormat[]) {