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]) * 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 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)))
387 return AVERROR(ENOMEM);
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)
437 if ((ret = ff_vc1_init_common(v)) < 0)
440 if (avctx->codec_id == AV_CODEC_ID_WMV3 || avctx->codec_id == AV_CODEC_ID_WMV3IMAGE) {
443 // looks like WMV3 has a sequence header stored in the extradata
444 // advanced sequence header may be before the first frame
445 // the last byte of the extradata is a version number, 1 for the
446 // samples we can decode
448 init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);
450 if ((ret = ff_vc1_decode_sequence_header(avctx, v, &gb)) < 0)
453 count = avctx->extradata_size*8 - get_bits_count(&gb);
455 av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
456 count, get_bits_long(&gb, FFMIN(count, 32)));
457 } else if (count < 0) {
458 av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
460 } else { // VC1/WVC1/WVP2
461 const uint8_t *start = avctx->extradata;
462 uint8_t *end = avctx->extradata + avctx->extradata_size;
465 uint8_t *buf2 = NULL;
466 int seq_initialized = 0, ep_initialized = 0;
468 if (avctx->extradata_size < 16) {
469 av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);
473 buf2 = av_mallocz(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
475 return AVERROR(ENOMEM);
477 start = find_next_marker(start, end); // in WVC1 extradata first byte is its size, but can be 0 in mkv
479 for (; next < end; start = next) {
480 next = find_next_marker(start + 4, end);
481 size = next - start - 4;
484 buf2_size = vc1_unescape_buffer(start + 4, size, buf2);
485 init_get_bits(&gb, buf2, buf2_size * 8);
486 switch (AV_RB32(start)) {
487 case VC1_CODE_SEQHDR:
488 if ((ret = ff_vc1_decode_sequence_header(avctx, v, &gb)) < 0) {
494 case VC1_CODE_ENTRYPOINT:
495 if ((ret = ff_vc1_decode_entry_point(avctx, v, &gb)) < 0) {
504 if (!seq_initialized || !ep_initialized) {
505 av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");
508 v->res_sprite = (avctx->codec_id == AV_CODEC_ID_VC1IMAGE);
511 avctx->profile = v->profile;
512 if (v->profile == PROFILE_ADVANCED)
513 avctx->level = v->level;
515 if (!CONFIG_GRAY || !(avctx->flags & AV_CODEC_FLAG_GRAY))
516 avctx->pix_fmt = ff_get_format(avctx, avctx->codec->pix_fmts);
518 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
519 if (avctx->color_range == AVCOL_RANGE_UNSPECIFIED)
520 avctx->color_range = AVCOL_RANGE_MPEG;
523 // ensure static VLC tables are initialized
524 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
526 if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0)
528 // Hack to ensure the above functions will be called
529 // again once we know all necessary settings.
530 // That this is necessary might indicate a bug.
531 ff_vc1_decode_end(avctx);
533 ff_blockdsp_init(&s->bdsp, avctx);
534 ff_h264chroma_init(&v->h264chroma, 8);
535 ff_qpeldsp_init(&s->qdsp);
537 // Must happen after calling ff_vc1_decode_end
538 // to avoid de-allocating the sprite_output_frame
539 v->sprite_output_frame = av_frame_alloc();
540 if (!v->sprite_output_frame)
541 return AVERROR(ENOMEM);
543 avctx->has_b_frames = !!avctx->max_b_frames;
545 if (v->color_prim == 1 || v->color_prim == 5 || v->color_prim == 6)
546 avctx->color_primaries = v->color_prim;
547 if (v->transfer_char == 1 || v->transfer_char == 7)
548 avctx->color_trc = v->transfer_char;
549 if (v->matrix_coef == 1 || v->matrix_coef == 6 || v->matrix_coef == 7)
550 avctx->colorspace = v->matrix_coef;
552 s->mb_width = (avctx->coded_width + 15) >> 4;
553 s->mb_height = (avctx->coded_height + 15) >> 4;
555 if (v->profile == PROFILE_ADVANCED || v->res_fasttx) {
556 ff_vc1_init_transposed_scantables(v);
558 memcpy(v->zz_8x8, ff_wmv1_scantable, 4*64);
563 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
564 v->sprite_width = avctx->coded_width;
565 v->sprite_height = avctx->coded_height;
567 avctx->coded_width = avctx->width = v->output_width;
568 avctx->coded_height = avctx->height = v->output_height;
570 // prevent 16.16 overflows
571 if (v->sprite_width > 1 << 14 ||
572 v->sprite_height > 1 << 14 ||
573 v->output_width > 1 << 14 ||
574 v->output_height > 1 << 14) return -1;
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(buf_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 /* assuming that the field marker is at the exact middle,
703 slices[n_slices].mby_start = s->mb_height + 1 >> 1;
704 slices[n_slices].rawbuf = start;
705 slices[n_slices].raw_size = size + 4;
706 n_slices1 = n_slices - 1; // index of the last slice of the first field
710 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */
711 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
712 init_get_bits(&s->gb, buf2, buf_size2 * 8);
713 ff_vc1_decode_entry_point(avctx, v, &s->gb);
715 case VC1_CODE_SLICE: {
717 tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
719 ret = AVERROR(ENOMEM);
723 slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
724 if (!slices[n_slices].buf) {
725 ret = AVERROR(ENOMEM);
728 buf_size3 = vc1_unescape_buffer(start + 4, size,
729 slices[n_slices].buf);
730 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
732 slices[n_slices].mby_start = get_bits(&slices[n_slices].gb, 9);
733 slices[n_slices].rawbuf = start;
734 slices[n_slices].raw_size = size + 4;
740 } else if (v->interlace && ((buf[0] & 0xC0) == 0xC0)) { /* WVC1 interlaced stores both fields divided by marker */
741 const uint8_t *divider;
744 divider = find_next_marker(buf, buf + buf_size);
745 if ((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD) {
746 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");
747 ret = AVERROR_INVALIDDATA;
749 } else { // found field marker, unescape second field
751 buf_start_second_field = divider;
752 tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
754 ret = AVERROR(ENOMEM);
758 slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
759 if (!slices[n_slices].buf) {
760 ret = AVERROR(ENOMEM);
763 buf_size3 = vc1_unescape_buffer(divider + 4, buf + buf_size - divider - 4, slices[n_slices].buf);
764 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
766 slices[n_slices].mby_start = s->mb_height + 1 >> 1;
767 slices[n_slices].rawbuf = divider;
768 slices[n_slices].raw_size = buf + buf_size - divider;
769 n_slices1 = n_slices - 1;
772 buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);
774 buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);
776 init_get_bits(&s->gb, buf2, buf_size2*8);
778 init_get_bits(&s->gb, buf, buf_size*8);
781 v->new_sprite = !get_bits1(&s->gb);
782 v->two_sprites = get_bits1(&s->gb);
783 /* res_sprite means a Windows Media Image stream, AV_CODEC_ID_*IMAGE means
784 we're using the sprite compositor. These are intentionally kept separate
785 so you can get the raw sprites by using the wmv3 decoder for WMVP or
786 the vc1 one for WVP2 */
787 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
789 // switch AVCodecContext parameters to those of the sprites
790 avctx->width = avctx->coded_width = v->sprite_width;
791 avctx->height = avctx->coded_height = v->sprite_height;
798 if (s->context_initialized &&
799 (s->width != avctx->coded_width ||
800 s->height != avctx->coded_height)) {
801 ff_vc1_decode_end(avctx);
804 if (!s->context_initialized) {
805 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
807 if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0) {
808 ff_mpv_common_end(s);
812 s->low_delay = !avctx->has_b_frames || v->res_sprite;
814 if (v->profile == PROFILE_ADVANCED) {
815 if(avctx->coded_width<=1 || avctx->coded_height<=1) {
816 ret = AVERROR_INVALIDDATA;
819 s->h_edge_pos = avctx->coded_width;
820 s->v_edge_pos = avctx->coded_height;
824 // do parse frame header
825 v->pic_header_flag = 0;
826 v->first_pic_header_flag = 1;
827 if (v->profile < PROFILE_ADVANCED) {
828 if ((ret = ff_vc1_parse_frame_header(v, &s->gb)) < 0) {
832 if ((ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
836 v->first_pic_header_flag = 0;
838 if (avctx->debug & FF_DEBUG_PICT_INFO)
839 av_log(v->s.avctx, AV_LOG_DEBUG, "pict_type: %c\n", av_get_picture_type_char(s->pict_type));
841 if ((avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE)
842 && s->pict_type != AV_PICTURE_TYPE_I) {
843 av_log(v->s.avctx, AV_LOG_ERROR, "Sprite decoder: expected I-frame\n");
844 ret = AVERROR_INVALIDDATA;
848 if ((s->mb_height >> v->field_mode) == 0) {
849 av_log(v->s.avctx, AV_LOG_ERROR, "image too short\n");
850 ret = AVERROR_INVALIDDATA;
854 // for skipping the frame
855 s->current_picture.f->pict_type = s->pict_type;
856 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
858 /* skip B-frames if we don't have reference frames */
859 if (!s->last_picture_ptr && (s->pict_type == AV_PICTURE_TYPE_B || s->droppable)) {
860 av_log(v->s.avctx, AV_LOG_DEBUG, "Skipping B frame without reference frames\n");
863 if ((avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B) ||
864 (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I) ||
865 avctx->skip_frame >= AVDISCARD_ALL) {
869 if (s->next_p_frame_damaged) {
870 if (s->pict_type == AV_PICTURE_TYPE_B)
873 s->next_p_frame_damaged = 0;
876 if ((ret = ff_mpv_frame_start(s, avctx)) < 0) {
880 v->s.current_picture_ptr->field_picture = v->field_mode;
881 v->s.current_picture_ptr->f->interlaced_frame = (v->fcm != PROGRESSIVE);
882 v->s.current_picture_ptr->f->top_field_first = v->tff;
884 // process pulldown flags
885 s->current_picture_ptr->f->repeat_pict = 0;
886 // Pulldown flags are only valid when 'broadcast' has been set.
887 // So ticks_per_frame will be 2
890 s->current_picture_ptr->f->repeat_pict = 1;
891 } else if (v->rptfrm) {
893 s->current_picture_ptr->f->repeat_pict = v->rptfrm * 2;
896 s->me.qpel_put = s->qdsp.put_qpel_pixels_tab;
897 s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab;
899 if (avctx->hwaccel) {
901 if (v->field_mode && buf_start_second_field) {
902 // decode first field
903 s->picture_structure = PICT_BOTTOM_FIELD - v->tff;
904 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
906 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
908 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
911 // decode second field
912 s->gb = slices[n_slices1 + 1].gb;
913 s->picture_structure = PICT_TOP_FIELD + v->tff;
915 v->pic_header_flag = 0;
916 if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
917 av_log(avctx, AV_LOG_ERROR, "parsing header for second field failed");
918 ret = AVERROR_INVALIDDATA;
921 v->s.current_picture_ptr->f->pict_type = v->s.pict_type;
923 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
925 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
927 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
930 s->picture_structure = PICT_FRAME;
931 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
935 // no slices, decode the frame as-is
936 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
939 // decode the frame part as the first slice
940 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, slices[0].rawbuf - buf_start)) < 0)
943 // and process the slices as additional slices afterwards
944 for (i = 0 ; i < n_slices; i++) {
945 s->gb = slices[i].gb;
946 s->mb_y = slices[i].mby_start;
948 v->pic_header_flag = get_bits1(&s->gb);
949 if (v->pic_header_flag) {
950 if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
951 av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");
952 ret = AVERROR_INVALIDDATA;
953 if (avctx->err_recognition & AV_EF_EXPLODE)
959 if ((ret = avctx->hwaccel->decode_slice(avctx, slices[i].rawbuf, slices[i].raw_size)) < 0)
963 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
969 ff_mpeg_er_frame_start(s);
971 v->bits = buf_size * 8;
972 v->end_mb_x = s->mb_width;
974 s->current_picture.f->linesize[0] <<= 1;
975 s->current_picture.f->linesize[1] <<= 1;
976 s->current_picture.f->linesize[2] <<= 1;
980 mb_height = s->mb_height >> v->field_mode;
982 av_assert0 (mb_height > 0);
984 for (i = 0; i <= n_slices; i++) {
985 if (i > 0 && slices[i - 1].mby_start >= mb_height) {
986 if (v->field_mode <= 0) {
987 av_log(v->s.avctx, AV_LOG_ERROR, "Slice %d starts beyond "
988 "picture boundary (%d >= %d)\n", i,
989 slices[i - 1].mby_start, mb_height);
993 av_assert0((s->mb_height & 1) == 0);
994 v->blocks_off = s->b8_stride * (s->mb_height&~1);
995 v->mb_off = s->mb_stride * s->mb_height >> 1;
1002 v->pic_header_flag = 0;
1003 if (v->field_mode && i == n_slices1 + 2) {
1004 if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
1005 av_log(v->s.avctx, AV_LOG_ERROR, "Field header damaged\n");
1006 ret = AVERROR_INVALIDDATA;
1007 if (avctx->err_recognition & AV_EF_EXPLODE)
1011 } else if (get_bits1(&s->gb)) {
1012 v->pic_header_flag = 1;
1013 if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
1014 av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");
1015 ret = AVERROR_INVALIDDATA;
1016 if (avctx->err_recognition & AV_EF_EXPLODE)
1024 s->start_mb_y = (i == 0) ? 0 : FFMAX(0, slices[i-1].mby_start % mb_height);
1025 if (!v->field_mode || v->second_field)
1026 s->end_mb_y = (i == n_slices ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
1028 if (i >= n_slices) {
1029 av_log(v->s.avctx, AV_LOG_ERROR, "first field slice count too large\n");
1032 s->end_mb_y = (i <= n_slices1 + 1) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
1034 if (s->end_mb_y <= s->start_mb_y) {
1035 av_log(v->s.avctx, AV_LOG_ERROR, "end mb y %d %d invalid\n", s->end_mb_y, s->start_mb_y);
1038 if (!v->p_frame_skipped && s->pict_type != AV_PICTURE_TYPE_I && !v->cbpcy_vlc) {
1039 av_log(v->s.avctx, AV_LOG_ERROR, "missing cbpcy_vlc\n");
1042 ff_vc1_decode_blocks(v);
1044 s->gb = slices[i].gb;
1046 if (v->field_mode) {
1047 v->second_field = 0;
1048 s->current_picture.f->linesize[0] >>= 1;
1049 s->current_picture.f->linesize[1] >>= 1;
1050 s->current_picture.f->linesize[2] >>= 1;
1052 s->uvlinesize >>= 1;
1053 if (v->s.pict_type != AV_PICTURE_TYPE_BI && v->s.pict_type != AV_PICTURE_TYPE_B) {
1054 FFSWAP(uint8_t *, v->mv_f_next[0], v->mv_f[0]);
1055 FFSWAP(uint8_t *, v->mv_f_next[1], v->mv_f[1]);
1058 ff_dlog(s->avctx, "Consumed %i/%i bits\n",
1059 get_bits_count(&s->gb), s->gb.size_in_bits);
1060 // if (get_bits_count(&s->gb) > buf_size * 8)
1062 if(s->er.error_occurred && s->pict_type == AV_PICTURE_TYPE_B) {
1063 ret = AVERROR_INVALIDDATA;
1067 ff_er_frame_end(&s->er);
1070 ff_mpv_frame_end(s);
1072 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
1074 avctx->width = avctx->coded_width = v->output_width;
1075 avctx->height = avctx->coded_height = v->output_height;
1076 if (avctx->skip_frame >= AVDISCARD_NONREF)
1078 #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
1079 if ((ret = vc1_decode_sprites(v, &s->gb)) < 0)
1082 if ((ret = av_frame_ref(pict, v->sprite_output_frame)) < 0)
1086 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1087 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
1089 ff_print_debug_info(s, s->current_picture_ptr, pict);
1091 } else if (s->last_picture_ptr) {
1092 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
1094 ff_print_debug_info(s, s->last_picture_ptr, pict);
1101 for (i = 0; i < n_slices; i++)
1102 av_free(slices[i].buf);
1108 for (i = 0; i < n_slices; i++)
1109 av_free(slices[i].buf);
1115 static const enum AVPixelFormat vc1_hwaccel_pixfmt_list_420[] = {
1116 #if CONFIG_VC1_DXVA2_HWACCEL
1117 AV_PIX_FMT_DXVA2_VLD,
1119 #if CONFIG_VC1_D3D11VA_HWACCEL
1120 AV_PIX_FMT_D3D11VA_VLD,
1123 #if CONFIG_VC1_NVDEC_HWACCEL
1126 #if CONFIG_VC1_VAAPI_HWACCEL
1129 #if CONFIG_VC1_VDPAU_HWACCEL
1136 AVCodec ff_vc1_decoder = {
1138 .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),
1139 .type = AVMEDIA_TYPE_VIDEO,
1140 .id = AV_CODEC_ID_VC1,
1141 .priv_data_size = sizeof(VC1Context),
1142 .init = vc1_decode_init,
1143 .close = ff_vc1_decode_end,
1144 .decode = vc1_decode_frame,
1145 .flush = ff_mpeg_flush,
1146 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1147 .pix_fmts = vc1_hwaccel_pixfmt_list_420,
1148 .hw_configs = (const AVCodecHWConfigInternal*[]) {
1149 #if CONFIG_VC1_DXVA2_HWACCEL
1152 #if CONFIG_VC1_D3D11VA_HWACCEL
1153 HWACCEL_D3D11VA(vc1),
1155 #if CONFIG_VC1_D3D11VA2_HWACCEL
1156 HWACCEL_D3D11VA2(vc1),
1158 #if CONFIG_VC1_NVDEC_HWACCEL
1161 #if CONFIG_VC1_VAAPI_HWACCEL
1164 #if CONFIG_VC1_VDPAU_HWACCEL
1169 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1172 #if CONFIG_WMV3_DECODER
1173 AVCodec ff_wmv3_decoder = {
1175 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),
1176 .type = AVMEDIA_TYPE_VIDEO,
1177 .id = AV_CODEC_ID_WMV3,
1178 .priv_data_size = sizeof(VC1Context),
1179 .init = vc1_decode_init,
1180 .close = ff_vc1_decode_end,
1181 .decode = vc1_decode_frame,
1182 .flush = ff_mpeg_flush,
1183 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1184 .pix_fmts = vc1_hwaccel_pixfmt_list_420,
1185 .hw_configs = (const AVCodecHWConfigInternal*[]) {
1186 #if CONFIG_WMV3_DXVA2_HWACCEL
1187 HWACCEL_DXVA2(wmv3),
1189 #if CONFIG_WMV3_D3D11VA_HWACCEL
1190 HWACCEL_D3D11VA(wmv3),
1192 #if CONFIG_WMV3_D3D11VA2_HWACCEL
1193 HWACCEL_D3D11VA2(wmv3),
1195 #if CONFIG_WMV3_NVDEC_HWACCEL
1196 HWACCEL_NVDEC(wmv3),
1198 #if CONFIG_WMV3_VAAPI_HWACCEL
1199 HWACCEL_VAAPI(wmv3),
1201 #if CONFIG_WMV3_VDPAU_HWACCEL
1202 HWACCEL_VDPAU(wmv3),
1206 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1210 #if CONFIG_WMV3IMAGE_DECODER
1211 AVCodec ff_wmv3image_decoder = {
1212 .name = "wmv3image",
1213 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image"),
1214 .type = AVMEDIA_TYPE_VIDEO,
1215 .id = AV_CODEC_ID_WMV3IMAGE,
1216 .priv_data_size = sizeof(VC1Context),
1217 .init = vc1_decode_init,
1218 .close = ff_vc1_decode_end,
1219 .decode = vc1_decode_frame,
1220 .capabilities = AV_CODEC_CAP_DR1,
1221 .flush = vc1_sprite_flush,
1222 .pix_fmts = (const enum AVPixelFormat[]) {
1229 #if CONFIG_VC1IMAGE_DECODER
1230 AVCodec ff_vc1image_decoder = {
1232 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image v2"),
1233 .type = AVMEDIA_TYPE_VIDEO,
1234 .id = AV_CODEC_ID_VC1IMAGE,
1235 .priv_data_size = sizeof(VC1Context),
1236 .init = vc1_decode_init,
1237 .close = ff_vc1_decode_end,
1238 .decode = vc1_decode_frame,
1239 .capabilities = AV_CODEC_CAP_DR1,
1240 .flush = vc1_sprite_flush,
1241 .pix_fmts = (const enum AVPixelFormat[]) {