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;
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: Decypher 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 } *slices = NULL, *tmp;
641 if(s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
644 /* no supplementary picture */
645 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == VC1_CODE_ENDOFSEQ)) {
646 /* special case for last picture */
647 if (s->low_delay == 0 && s->next_picture_ptr) {
648 if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
650 s->next_picture_ptr = NULL;
659 if (s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU) {
660 if (v->profile < PROFILE_ADVANCED)
661 avctx->pix_fmt = AV_PIX_FMT_VDPAU_WMV3;
663 avctx->pix_fmt = AV_PIX_FMT_VDPAU_VC1;
667 //for advanced profile we may need to parse and unescape data
668 if (avctx->codec_id == AV_CODEC_ID_VC1 || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
670 buf2 = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
672 return AVERROR(ENOMEM);
674 if (IS_MARKER(AV_RB32(buf))) { /* frame starts with marker and needs to be parsed */
675 const uint8_t *start, *end, *next;
679 for (start = buf, end = buf + buf_size; next < end; start = next) {
680 next = find_next_marker(start + 4, end);
681 size = next - start - 4;
682 if (size <= 0) continue;
683 switch (AV_RB32(start)) {
687 || s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU
691 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
693 case VC1_CODE_FIELD: {
697 || s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU
700 buf_start_second_field = start;
701 tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
703 ret = AVERROR(ENOMEM);
707 slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
708 if (!slices[n_slices].buf) {
709 ret = AVERROR(ENOMEM);
712 buf_size3 = vc1_unescape_buffer(start + 4, size,
713 slices[n_slices].buf);
714 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
716 /* assuming that the field marker is at the exact middle,
718 slices[n_slices].mby_start = s->mb_height + 1 >> 1;
719 n_slices1 = n_slices - 1; // index of the last slice of the first field
723 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */
724 buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
725 init_get_bits(&s->gb, buf2, buf_size2 * 8);
726 ff_vc1_decode_entry_point(avctx, v, &s->gb);
728 case VC1_CODE_SLICE: {
730 tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
732 ret = AVERROR(ENOMEM);
736 slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
737 if (!slices[n_slices].buf) {
738 ret = AVERROR(ENOMEM);
741 buf_size3 = vc1_unescape_buffer(start + 4, size,
742 slices[n_slices].buf);
743 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
745 slices[n_slices].mby_start = get_bits(&slices[n_slices].gb, 9);
751 } else if (v->interlace && ((buf[0] & 0xC0) == 0xC0)) { /* WVC1 interlaced stores both fields divided by marker */
752 const uint8_t *divider;
755 divider = find_next_marker(buf, buf + buf_size);
756 if ((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD) {
757 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");
758 ret = AVERROR_INVALIDDATA;
760 } else { // found field marker, unescape second field
763 || s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU
766 buf_start_second_field = divider;
767 tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
769 ret = AVERROR(ENOMEM);
773 slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
774 if (!slices[n_slices].buf) {
775 ret = AVERROR(ENOMEM);
778 buf_size3 = vc1_unescape_buffer(divider + 4, buf + buf_size - divider - 4, slices[n_slices].buf);
779 init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
781 slices[n_slices].mby_start = s->mb_height + 1 >> 1;
782 n_slices1 = n_slices - 1;
785 buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);
787 buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);
789 init_get_bits(&s->gb, buf2, buf_size2*8);
791 init_get_bits(&s->gb, buf, buf_size*8);
794 v->new_sprite = !get_bits1(&s->gb);
795 v->two_sprites = get_bits1(&s->gb);
796 /* res_sprite means a Windows Media Image stream, AV_CODEC_ID_*IMAGE means
797 we're using the sprite compositor. These are intentionally kept separate
798 so you can get the raw sprites by using the wmv3 decoder for WMVP or
799 the vc1 one for WVP2 */
800 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
802 // switch AVCodecContext parameters to those of the sprites
803 avctx->width = avctx->coded_width = v->sprite_width;
804 avctx->height = avctx->coded_height = v->sprite_height;
811 if (s->context_initialized &&
812 (s->width != avctx->coded_width ||
813 s->height != avctx->coded_height)) {
814 ff_vc1_decode_end(avctx);
817 if (!s->context_initialized) {
818 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
820 if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0) {
821 ff_mpv_common_end(s);
825 s->low_delay = !avctx->has_b_frames || v->res_sprite;
827 if (v->profile == PROFILE_ADVANCED) {
828 if(avctx->coded_width<=1 || avctx->coded_height<=1) {
829 ret = AVERROR_INVALIDDATA;
832 s->h_edge_pos = avctx->coded_width;
833 s->v_edge_pos = avctx->coded_height;
837 // do parse frame header
838 v->pic_header_flag = 0;
839 v->first_pic_header_flag = 1;
840 if (v->profile < PROFILE_ADVANCED) {
841 if ((ret = ff_vc1_parse_frame_header(v, &s->gb)) < 0) {
845 if ((ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
849 v->first_pic_header_flag = 0;
851 if (avctx->debug & FF_DEBUG_PICT_INFO)
852 av_log(v->s.avctx, AV_LOG_DEBUG, "pict_type: %c\n", av_get_picture_type_char(s->pict_type));
854 if ((avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE)
855 && s->pict_type != AV_PICTURE_TYPE_I) {
856 av_log(v->s.avctx, AV_LOG_ERROR, "Sprite decoder: expected I-frame\n");
857 ret = AVERROR_INVALIDDATA;
861 if ((s->mb_height >> v->field_mode) == 0) {
862 av_log(v->s.avctx, AV_LOG_ERROR, "image too short\n");
863 ret = AVERROR_INVALIDDATA;
867 // for skipping the frame
868 s->current_picture.f->pict_type = s->pict_type;
869 s->current_picture.f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
871 /* skip B-frames if we don't have reference frames */
872 if (!s->last_picture_ptr && (s->pict_type == AV_PICTURE_TYPE_B || s->droppable)) {
873 av_log(v->s.avctx, AV_LOG_DEBUG, "Skipping B frame without reference frames\n");
876 if ((avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B) ||
877 (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I) ||
878 avctx->skip_frame >= AVDISCARD_ALL) {
882 if (s->next_p_frame_damaged) {
883 if (s->pict_type == AV_PICTURE_TYPE_B)
886 s->next_p_frame_damaged = 0;
889 if ((ret = ff_mpv_frame_start(s, avctx)) < 0) {
893 v->s.current_picture_ptr->field_picture = v->field_mode;
894 v->s.current_picture_ptr->f->interlaced_frame = (v->fcm != PROGRESSIVE);
895 v->s.current_picture_ptr->f->top_field_first = v->tff;
897 // process pulldown flags
898 s->current_picture_ptr->f->repeat_pict = 0;
899 // Pulldown flags are only valid when 'broadcast' has been set.
900 // So ticks_per_frame will be 2
903 s->current_picture_ptr->f->repeat_pict = 1;
904 } else if (v->rptfrm) {
906 s->current_picture_ptr->f->repeat_pict = v->rptfrm * 2;
909 s->me.qpel_put = s->qdsp.put_qpel_pixels_tab;
910 s->me.qpel_avg = s->qdsp.avg_qpel_pixels_tab;
913 if ((CONFIG_VC1_VDPAU_DECODER)
914 &&s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU) {
915 if (v->field_mode && buf_start_second_field) {
916 ff_vdpau_vc1_decode_picture(s, buf_start, buf_start_second_field - buf_start);
917 ff_vdpau_vc1_decode_picture(s, buf_start_second_field, (buf + buf_size) - buf_start_second_field);
919 ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);
923 if (avctx->hwaccel) {
924 if (v->field_mode && buf_start_second_field) {
925 // decode first field
926 s->picture_structure = PICT_BOTTOM_FIELD - v->tff;
927 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
929 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
931 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
934 // decode second field
935 s->gb = slices[n_slices1 + 1].gb;
936 s->picture_structure = PICT_TOP_FIELD + v->tff;
938 v->pic_header_flag = 0;
939 if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
940 av_log(avctx, AV_LOG_ERROR, "parsing header for second field failed");
941 ret = AVERROR_INVALIDDATA;
944 v->s.current_picture_ptr->f->pict_type = v->s.pict_type;
946 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
948 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
950 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
953 s->picture_structure = PICT_FRAME;
954 if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
956 if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
958 if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
964 ff_mpeg_er_frame_start(s);
966 v->bits = buf_size * 8;
967 v->end_mb_x = s->mb_width;
969 s->current_picture.f->linesize[0] <<= 1;
970 s->current_picture.f->linesize[1] <<= 1;
971 s->current_picture.f->linesize[2] <<= 1;
975 mb_height = s->mb_height >> v->field_mode;
977 av_assert0 (mb_height > 0);
979 for (i = 0; i <= n_slices; i++) {
980 if (i > 0 && slices[i - 1].mby_start >= mb_height) {
981 if (v->field_mode <= 0) {
982 av_log(v->s.avctx, AV_LOG_ERROR, "Slice %d starts beyond "
983 "picture boundary (%d >= %d)\n", i,
984 slices[i - 1].mby_start, mb_height);
988 av_assert0((s->mb_height & 1) == 0);
989 v->blocks_off = s->b8_stride * (s->mb_height&~1);
990 v->mb_off = s->mb_stride * s->mb_height >> 1;
997 v->pic_header_flag = 0;
998 if (v->field_mode && i == n_slices1 + 2) {
999 if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
1000 av_log(v->s.avctx, AV_LOG_ERROR, "Field header damaged\n");
1001 ret = AVERROR_INVALIDDATA;
1002 if (avctx->err_recognition & AV_EF_EXPLODE)
1006 } else if (get_bits1(&s->gb)) {
1007 v->pic_header_flag = 1;
1008 if ((header_ret = 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)
1019 s->start_mb_y = (i == 0) ? 0 : FFMAX(0, slices[i-1].mby_start % mb_height);
1020 if (!v->field_mode || v->second_field)
1021 s->end_mb_y = (i == n_slices ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
1023 if (i >= n_slices) {
1024 av_log(v->s.avctx, AV_LOG_ERROR, "first field slice count too large\n");
1027 s->end_mb_y = (i <= n_slices1 + 1) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
1029 if (s->end_mb_y <= s->start_mb_y) {
1030 av_log(v->s.avctx, AV_LOG_ERROR, "end mb y %d %d invalid\n", s->end_mb_y, s->start_mb_y);
1033 if (!v->p_frame_skipped && s->pict_type != AV_PICTURE_TYPE_I && !v->cbpcy_vlc) {
1034 av_log(v->s.avctx, AV_LOG_ERROR, "missing cbpcy_vlc\n");
1037 ff_vc1_decode_blocks(v);
1039 s->gb = slices[i].gb;
1041 if (v->field_mode) {
1042 v->second_field = 0;
1043 s->current_picture.f->linesize[0] >>= 1;
1044 s->current_picture.f->linesize[1] >>= 1;
1045 s->current_picture.f->linesize[2] >>= 1;
1047 s->uvlinesize >>= 1;
1048 if (v->s.pict_type != AV_PICTURE_TYPE_BI && v->s.pict_type != AV_PICTURE_TYPE_B) {
1049 FFSWAP(uint8_t *, v->mv_f_next[0], v->mv_f[0]);
1050 FFSWAP(uint8_t *, v->mv_f_next[1], v->mv_f[1]);
1053 ff_dlog(s->avctx, "Consumed %i/%i bits\n",
1054 get_bits_count(&s->gb), s->gb.size_in_bits);
1055 // if (get_bits_count(&s->gb) > buf_size * 8)
1057 if(s->er.error_occurred && s->pict_type == AV_PICTURE_TYPE_B) {
1058 ret = AVERROR_INVALIDDATA;
1062 ff_er_frame_end(&s->er);
1065 ff_mpv_frame_end(s);
1067 if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
1069 avctx->width = avctx->coded_width = v->output_width;
1070 avctx->height = avctx->coded_height = v->output_height;
1071 if (avctx->skip_frame >= AVDISCARD_NONREF)
1073 #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
1074 if ((ret = vc1_decode_sprites(v, &s->gb)) < 0)
1077 if ((ret = av_frame_ref(pict, v->sprite_output_frame)) < 0)
1081 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1082 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
1084 ff_print_debug_info(s, s->current_picture_ptr, pict);
1086 } else if (s->last_picture_ptr) {
1087 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
1089 ff_print_debug_info(s, s->last_picture_ptr, pict);
1096 for (i = 0; i < n_slices; i++)
1097 av_free(slices[i].buf);
1103 for (i = 0; i < n_slices; i++)
1104 av_free(slices[i].buf);
1110 static const enum AVPixelFormat vc1_hwaccel_pixfmt_list_420[] = {
1111 #if CONFIG_VC1_DXVA2_HWACCEL
1112 AV_PIX_FMT_DXVA2_VLD,
1114 #if CONFIG_VC1_D3D11VA_HWACCEL
1115 AV_PIX_FMT_D3D11VA_VLD,
1117 #if CONFIG_VC1_VAAPI_HWACCEL
1120 #if CONFIG_VC1_VDPAU_HWACCEL
1127 AVCodec ff_vc1_decoder = {
1129 .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),
1130 .type = AVMEDIA_TYPE_VIDEO,
1131 .id = AV_CODEC_ID_VC1,
1132 .priv_data_size = sizeof(VC1Context),
1133 .init = vc1_decode_init,
1134 .close = ff_vc1_decode_end,
1135 .decode = vc1_decode_frame,
1136 .flush = ff_mpeg_flush,
1137 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1138 .pix_fmts = vc1_hwaccel_pixfmt_list_420,
1139 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1142 #if CONFIG_WMV3_DECODER
1143 AVCodec ff_wmv3_decoder = {
1145 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),
1146 .type = AVMEDIA_TYPE_VIDEO,
1147 .id = AV_CODEC_ID_WMV3,
1148 .priv_data_size = sizeof(VC1Context),
1149 .init = vc1_decode_init,
1150 .close = ff_vc1_decode_end,
1151 .decode = vc1_decode_frame,
1152 .flush = ff_mpeg_flush,
1153 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1154 .pix_fmts = vc1_hwaccel_pixfmt_list_420,
1155 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1159 #if CONFIG_WMV3_VDPAU_DECODER && FF_API_VDPAU
1160 AVCodec ff_wmv3_vdpau_decoder = {
1161 .name = "wmv3_vdpau",
1162 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),
1163 .type = AVMEDIA_TYPE_VIDEO,
1164 .id = AV_CODEC_ID_WMV3,
1165 .priv_data_size = sizeof(VC1Context),
1166 .init = vc1_decode_init,
1167 .close = ff_vc1_decode_end,
1168 .decode = vc1_decode_frame,
1169 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HWACCEL_VDPAU,
1170 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_WMV3, AV_PIX_FMT_NONE },
1171 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1175 #if CONFIG_VC1_VDPAU_DECODER && FF_API_VDPAU
1176 AVCodec ff_vc1_vdpau_decoder = {
1177 .name = "vc1_vdpau",
1178 .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),
1179 .type = AVMEDIA_TYPE_VIDEO,
1180 .id = AV_CODEC_ID_VC1,
1181 .priv_data_size = sizeof(VC1Context),
1182 .init = vc1_decode_init,
1183 .close = ff_vc1_decode_end,
1184 .decode = vc1_decode_frame,
1185 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HWACCEL_VDPAU,
1186 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_VC1, AV_PIX_FMT_NONE },
1187 .profiles = NULL_IF_CONFIG_SMALL(ff_vc1_profiles)
1191 #if CONFIG_WMV3IMAGE_DECODER
1192 AVCodec ff_wmv3image_decoder = {
1193 .name = "wmv3image",
1194 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image"),
1195 .type = AVMEDIA_TYPE_VIDEO,
1196 .id = AV_CODEC_ID_WMV3IMAGE,
1197 .priv_data_size = sizeof(VC1Context),
1198 .init = vc1_decode_init,
1199 .close = ff_vc1_decode_end,
1200 .decode = vc1_decode_frame,
1201 .capabilities = AV_CODEC_CAP_DR1,
1202 .flush = vc1_sprite_flush,
1203 .pix_fmts = (const enum AVPixelFormat[]) {
1210 #if CONFIG_VC1IMAGE_DECODER
1211 AVCodec ff_vc1image_decoder = {
1213 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image v2"),
1214 .type = AVMEDIA_TYPE_VIDEO,
1215 .id = AV_CODEC_ID_VC1IMAGE,
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[]) {