xref: /third_party/ffmpeg/libavcodec/wmv2dec.c (revision cabdff1a)
1/*
2 * Copyright (c) 2002 The FFmpeg Project
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "libavutil/mem_internal.h"
22
23#include "avcodec.h"
24#include "codec_internal.h"
25#include "h263dec.h"
26#include "intrax8.h"
27#include "mathops.h"
28#include "mpegutils.h"
29#include "mpegvideo.h"
30#include "msmpeg4.h"
31#include "msmpeg4data.h"
32#include "msmpeg4dec.h"
33#include "simple_idct.h"
34#include "wmv2.h"
35#include "wmv2data.h"
36#include "wmv2dec.h"
37
38typedef struct WMV2DecContext {
39    MpegEncContext s;
40    WMV2Context common;
41    IntraX8Context x8;
42    int j_type_bit;
43    int j_type;
44    int abt_flag;
45    int abt_type;
46    int abt_type_table[6];
47    int per_mb_abt;
48    int per_block_abt;
49    int mspel_bit;
50    int cbp_table_index;
51    int top_left_mv_flag;
52    int per_mb_rl_bit;
53    int skip_type;
54
55    ScanTable abt_scantable[2];
56    DECLARE_ALIGNED(32, int16_t, abt_block2)[6][64];
57} WMV2DecContext;
58
59static void wmv2_add_block(WMV2DecContext *w, int16_t *block1,
60                           uint8_t *dst, int stride, int n)
61{
62    MpegEncContext *const s = &w->s;
63
64    if (s->block_last_index[n] >= 0) {
65        switch (w->abt_type_table[n]) {
66        case 0:
67            w->common.wdsp.idct_add(dst, stride, block1);
68            break;
69        case 1:
70            ff_simple_idct84_add(dst, stride, block1);
71            ff_simple_idct84_add(dst + 4 * stride, stride, w->abt_block2[n]);
72            s->bdsp.clear_block(w->abt_block2[n]);
73            break;
74        case 2:
75            ff_simple_idct48_add(dst, stride, block1);
76            ff_simple_idct48_add(dst + 4, stride, w->abt_block2[n]);
77            s->bdsp.clear_block(w->abt_block2[n]);
78            break;
79        default:
80            av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
81        }
82    }
83}
84
85void ff_wmv2_add_mb(MpegEncContext *s, int16_t block1[6][64],
86                    uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr)
87{
88    WMV2DecContext *const w = (WMV2DecContext *) s;
89
90    wmv2_add_block(w, block1[0], dest_y,                       s->linesize, 0);
91    wmv2_add_block(w, block1[1], dest_y + 8,                   s->linesize, 1);
92    wmv2_add_block(w, block1[2], dest_y + 8 * s->linesize,     s->linesize, 2);
93    wmv2_add_block(w, block1[3], dest_y + 8 + 8 * s->linesize, s->linesize, 3);
94
95    if (s->avctx->flags & AV_CODEC_FLAG_GRAY)
96        return;
97
98    wmv2_add_block(w, block1[4], dest_cb, s->uvlinesize, 4);
99    wmv2_add_block(w, block1[5], dest_cr, s->uvlinesize, 5);
100}
101
102static int parse_mb_skip(WMV2DecContext *w)
103{
104    int mb_x, mb_y;
105    int coded_mb_count = 0;
106    MpegEncContext *const s = &w->s;
107    uint32_t *const mb_type = s->current_picture_ptr->mb_type;
108
109    w->skip_type = get_bits(&s->gb, 2);
110    switch (w->skip_type) {
111    case SKIP_TYPE_NONE:
112        for (mb_y = 0; mb_y < s->mb_height; mb_y++)
113            for (mb_x = 0; mb_x < s->mb_width; mb_x++)
114                mb_type[mb_y * s->mb_stride + mb_x] =
115                    MB_TYPE_16x16 | MB_TYPE_L0;
116        break;
117    case SKIP_TYPE_MPEG:
118        if (get_bits_left(&s->gb) < s->mb_height * s->mb_width)
119            return AVERROR_INVALIDDATA;
120        for (mb_y = 0; mb_y < s->mb_height; mb_y++)
121            for (mb_x = 0; mb_x < s->mb_width; mb_x++)
122                mb_type[mb_y * s->mb_stride + mb_x] =
123                    (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
124        break;
125    case SKIP_TYPE_ROW:
126        for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
127            if (get_bits_left(&s->gb) < 1)
128                return AVERROR_INVALIDDATA;
129            if (get_bits1(&s->gb)) {
130                for (mb_x = 0; mb_x < s->mb_width; mb_x++)
131                    mb_type[mb_y * s->mb_stride + mb_x] =
132                        MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
133            } else {
134                for (mb_x = 0; mb_x < s->mb_width; mb_x++)
135                    mb_type[mb_y * s->mb_stride + mb_x] =
136                        (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
137            }
138        }
139        break;
140    case SKIP_TYPE_COL:
141        for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
142            if (get_bits_left(&s->gb) < 1)
143                return AVERROR_INVALIDDATA;
144            if (get_bits1(&s->gb)) {
145                for (mb_y = 0; mb_y < s->mb_height; mb_y++)
146                    mb_type[mb_y * s->mb_stride + mb_x] =
147                        MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
148            } else {
149                for (mb_y = 0; mb_y < s->mb_height; mb_y++)
150                    mb_type[mb_y * s->mb_stride + mb_x] =
151                        (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
152            }
153        }
154        break;
155    }
156
157    for (mb_y = 0; mb_y < s->mb_height; mb_y++)
158        for (mb_x = 0; mb_x < s->mb_width; mb_x++)
159            coded_mb_count += !IS_SKIP(mb_type[mb_y * s->mb_stride + mb_x]);
160
161    if (coded_mb_count > get_bits_left(&s->gb))
162        return AVERROR_INVALIDDATA;
163
164    return 0;
165}
166
167static int decode_ext_header(WMV2DecContext *w)
168{
169    MpegEncContext *const s = &w->s;
170    GetBitContext gb;
171    int fps;
172    int code;
173
174    if (s->avctx->extradata_size < 4)
175        return AVERROR_INVALIDDATA;
176
177    init_get_bits(&gb, s->avctx->extradata, 32);
178
179    fps                 = get_bits(&gb, 5);
180    s->bit_rate         = get_bits(&gb, 11) * 1024;
181    w->mspel_bit        = get_bits1(&gb);
182    s->loop_filter      = get_bits1(&gb);
183    w->abt_flag         = get_bits1(&gb);
184    w->j_type_bit       = get_bits1(&gb);
185    w->top_left_mv_flag = get_bits1(&gb);
186    w->per_mb_rl_bit    = get_bits1(&gb);
187    code                = get_bits(&gb, 3);
188
189    if (code == 0)
190        return AVERROR_INVALIDDATA;
191
192    s->slice_height = s->mb_height / code;
193
194    if (s->avctx->debug & FF_DEBUG_PICT_INFO)
195        av_log(s->avctx, AV_LOG_DEBUG,
196               "fps:%d, br:%"PRId64", qpbit:%d, abt_flag:%d, j_type_bit:%d, "
197               "tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, "
198               "slices:%d\n",
199               fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit,
200               w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter,
201               code);
202    return 0;
203}
204
205int ff_wmv2_decode_picture_header(MpegEncContext *s)
206{
207    WMV2DecContext *const w = (WMV2DecContext *) s;
208    int code;
209
210    if (s->picture_number == 0)
211        decode_ext_header(w);
212
213    s->pict_type = get_bits1(&s->gb) + 1;
214    if (s->pict_type == AV_PICTURE_TYPE_I) {
215        code = get_bits(&s->gb, 7);
216        av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
217    }
218    s->chroma_qscale = s->qscale = get_bits(&s->gb, 5);
219    if (s->qscale <= 0)
220        return AVERROR_INVALIDDATA;
221
222    if (s->pict_type != AV_PICTURE_TYPE_I && show_bits(&s->gb, 1)) {
223        GetBitContext gb = s->gb;
224        int skip_type = get_bits(&gb, 2);
225        int run = skip_type == SKIP_TYPE_COL ? s->mb_width : s->mb_height;
226
227        while (run > 0) {
228            int block = FFMIN(run, 25);
229            if (get_bits(&gb, block) + 1 != 1<<block)
230                break;
231            run -= block;
232        }
233        if (!run)
234            return FRAME_SKIPPED;
235    }
236
237    return 0;
238}
239
240int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
241{
242    WMV2DecContext *const w = (WMV2DecContext *) s;
243
244    if (s->pict_type == AV_PICTURE_TYPE_I) {
245        if (w->j_type_bit)
246            w->j_type = get_bits1(&s->gb);
247        else
248            w->j_type = 0; // FIXME check
249
250        if (!w->j_type) {
251            if (w->per_mb_rl_bit)
252                s->per_mb_rl_table = get_bits1(&s->gb);
253            else
254                s->per_mb_rl_table = 0;
255
256            if (!s->per_mb_rl_table) {
257                s->rl_chroma_table_index = decode012(&s->gb);
258                s->rl_table_index        = decode012(&s->gb);
259            }
260
261            s->dc_table_index = get_bits1(&s->gb);
262
263            // at minimum one bit per macroblock is required at least in a valid frame,
264            // we discard frames much smaller than this. Frames smaller than 1/8 of the
265            // smallest "black/skip" frame generally contain not much recoverable content
266            // while at the same time they have the highest computational requirements
267            // per byte
268            if (get_bits_left(&s->gb) * 8LL < (s->width+15)/16 * ((s->height+15)/16))
269                return AVERROR_INVALIDDATA;
270        }
271        s->inter_intra_pred = 0;
272        s->no_rounding      = 1;
273        if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
274            av_log(s->avctx, AV_LOG_DEBUG,
275                   "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
276                   s->qscale, s->rl_chroma_table_index, s->rl_table_index,
277                   s->dc_table_index, s->per_mb_rl_table, w->j_type);
278        }
279    } else {
280        int cbp_index;
281        int ret;
282        w->j_type = 0;
283
284        ret = parse_mb_skip(w);
285        if (ret < 0)
286            return ret;
287        cbp_index = decode012(&s->gb);
288        w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
289
290        if (w->mspel_bit)
291            s->mspel = get_bits1(&s->gb);
292        else
293            s->mspel = 0; // FIXME check
294
295        if (w->abt_flag) {
296            w->per_mb_abt = get_bits1(&s->gb) ^ 1;
297            if (!w->per_mb_abt)
298                w->abt_type = decode012(&s->gb);
299        }
300
301        if (w->per_mb_rl_bit)
302            s->per_mb_rl_table = get_bits1(&s->gb);
303        else
304            s->per_mb_rl_table = 0;
305
306        if (!s->per_mb_rl_table) {
307            s->rl_table_index        = decode012(&s->gb);
308            s->rl_chroma_table_index = s->rl_table_index;
309        }
310
311        if (get_bits_left(&s->gb) < 2)
312            return AVERROR_INVALIDDATA;
313
314        s->dc_table_index   = get_bits1(&s->gb);
315        s->mv_table_index   = get_bits1(&s->gb);
316
317        s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
318        s->no_rounding     ^= 1;
319
320        if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
321            av_log(s->avctx, AV_LOG_DEBUG,
322                   "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d "
323                   "per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
324                   s->rl_table_index, s->rl_chroma_table_index,
325                   s->dc_table_index, s->mv_table_index,
326                   s->per_mb_rl_table, s->qscale, s->mspel,
327                   w->per_mb_abt, w->abt_type, w->cbp_table_index,
328                   s->inter_intra_pred);
329        }
330    }
331    s->esc3_level_length = 0;
332    s->esc3_run_length   = 0;
333    s->picture_number++; // FIXME ?
334
335    if (w->j_type) {
336        ff_intrax8_decode_picture(&w->x8, &s->current_picture,
337                                  &s->gb, &s->mb_x, &s->mb_y,
338                                  2 * s->qscale, (s->qscale - 1) | 1,
339                                  s->loop_filter, s->low_delay);
340
341        ff_er_add_slice(&w->s.er, 0, 0,
342                        (w->s.mb_x >> 1) - 1, (w->s.mb_y >> 1) - 1,
343                        ER_MB_END);
344        return 1;
345    }
346
347    return 0;
348}
349
350static inline void wmv2_decode_motion(WMV2DecContext *w, int *mx_ptr, int *my_ptr)
351{
352    MpegEncContext *const s = &w->s;
353
354    ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
355
356    if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel)
357        w->common.hshift = get_bits1(&s->gb);
358    else
359        w->common.hshift = 0;
360}
361
362static int16_t *wmv2_pred_motion(WMV2DecContext *w, int *px, int *py)
363{
364    MpegEncContext *const s = &w->s;
365    int xy, wrap, diff, type;
366    int16_t *A, *B, *C, *mot_val;
367
368    wrap    = s->b8_stride;
369    xy      = s->block_index[0];
370
371    mot_val = s->current_picture.motion_val[0][xy];
372
373    A       = s->current_picture.motion_val[0][xy     - 1];
374    B       = s->current_picture.motion_val[0][xy     - wrap];
375    C       = s->current_picture.motion_val[0][xy + 2 - wrap];
376
377    if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
378        diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
379    else
380        diff = 0;
381
382    if (diff >= 8)
383        type = get_bits1(&s->gb);
384    else
385        type = 2;
386
387    if (type == 0) {
388        *px = A[0];
389        *py = A[1];
390    } else if (type == 1) {
391        *px = B[0];
392        *py = B[1];
393    } else {
394        /* special case for first (slice) line */
395        if (s->first_slice_line) {
396            *px = A[0];
397            *py = A[1];
398        } else {
399            *px = mid_pred(A[0], B[0], C[0]);
400            *py = mid_pred(A[1], B[1], C[1]);
401        }
402    }
403
404    return mot_val;
405}
406
407static inline int wmv2_decode_inter_block(WMV2DecContext *w, int16_t *block,
408                                          int n, int cbp)
409{
410    MpegEncContext *const s = &w->s;
411    static const int sub_cbp_table[3] = { 2, 3, 1 };
412    int sub_cbp, ret;
413
414    if (!cbp) {
415        s->block_last_index[n] = -1;
416        return 0;
417    }
418
419    if (w->per_block_abt)
420        w->abt_type = decode012(&s->gb);
421    w->abt_type_table[n] = w->abt_type;
422
423    if (w->abt_type) {
424//        const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated;
425        const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable;
426//        const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
427
428        sub_cbp = sub_cbp_table[decode012(&s->gb)];
429
430        if (sub_cbp & 1)
431            if ((ret = ff_msmpeg4_decode_block(s, block, n, 1, scantable)) < 0)
432                return ret;
433
434        if (sub_cbp & 2)
435            if ((ret = ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable)) < 0)
436                return ret;
437
438        s->block_last_index[n] = 63;
439
440        return 0;
441    } else {
442        return ff_msmpeg4_decode_block(s, block, n, 1,
443                                       s->inter_scantable.permutated);
444    }
445}
446
447int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
448{
449    /* The following is only allowed because this encoder
450     * does not use slice threading. */
451    WMV2DecContext *const w = (WMV2DecContext *) s;
452    int cbp, code, i, ret;
453    uint8_t *coded_val;
454
455    if (w->j_type)
456        return 0;
457
458    if (s->pict_type == AV_PICTURE_TYPE_P) {
459        if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) {
460            /* skip mb */
461            s->mb_intra = 0;
462            for (i = 0; i < 6; i++)
463                s->block_last_index[i] = -1;
464            s->mv_dir      = MV_DIR_FORWARD;
465            s->mv_type     = MV_TYPE_16X16;
466            s->mv[0][0][0] = 0;
467            s->mv[0][0][1] = 0;
468            s->mb_skipped  = 1;
469            w->common.hshift      = 0;
470            return 0;
471        }
472        if (get_bits_left(&s->gb) <= 0)
473            return AVERROR_INVALIDDATA;
474
475        code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table,
476                        MB_NON_INTRA_VLC_BITS, 3);
477        s->mb_intra = (~code & 0x40) >> 6;
478
479        cbp = code & 0x3f;
480    } else {
481        s->mb_intra = 1;
482        if (get_bits_left(&s->gb) <= 0)
483            return AVERROR_INVALIDDATA;
484        code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
485        /* predict coded block pattern */
486        cbp = 0;
487        for (i = 0; i < 6; i++) {
488            int val = ((code >> (5 - i)) & 1);
489            if (i < 4) {
490                int pred   = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
491                val        = val ^ pred;
492                *coded_val = val;
493            }
494            cbp |= val << (5 - i);
495        }
496    }
497
498    if (!s->mb_intra) {
499        int mx, my;
500        wmv2_pred_motion(w, &mx, &my);
501
502        if (cbp) {
503            s->bdsp.clear_blocks(s->block[0]);
504            if (s->per_mb_rl_table) {
505                s->rl_table_index        = decode012(&s->gb);
506                s->rl_chroma_table_index = s->rl_table_index;
507            }
508
509            if (w->abt_flag && w->per_mb_abt) {
510                w->per_block_abt = get_bits1(&s->gb);
511                if (!w->per_block_abt)
512                    w->abt_type = decode012(&s->gb);
513            } else
514                w->per_block_abt = 0;
515        }
516
517        wmv2_decode_motion(w, &mx, &my);
518
519        s->mv_dir      = MV_DIR_FORWARD;
520        s->mv_type     = MV_TYPE_16X16;
521        s->mv[0][0][0] = mx;
522        s->mv[0][0][1] = my;
523
524        for (i = 0; i < 6; i++) {
525            if ((ret = wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1)) < 0) {
526                av_log(s->avctx, AV_LOG_ERROR,
527                       "\nerror while decoding inter block: %d x %d (%d)\n",
528                       s->mb_x, s->mb_y, i);
529                return ret;
530            }
531        }
532    } else {
533        if (s->pict_type == AV_PICTURE_TYPE_P)
534            ff_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp);
535        ff_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
536                ((cbp & 3) ? 1 : 0) + ((cbp & 0x3C) ? 2 : 0),
537                show_bits(&s->gb, 24));
538        s->ac_pred = get_bits1(&s->gb);
539        if (s->inter_intra_pred) {
540            s->h263_aic_dir = get_vlc2(&s->gb, ff_inter_intra_vlc.table,
541                                       INTER_INTRA_VLC_BITS, 1);
542            ff_dlog(s->avctx, "%d%d %d %d/",
543                    s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
544        }
545        if (s->per_mb_rl_table && cbp) {
546            s->rl_table_index        = decode012(&s->gb);
547            s->rl_chroma_table_index = s->rl_table_index;
548        }
549
550        s->bdsp.clear_blocks(s->block[0]);
551        for (i = 0; i < 6; i++) {
552            if ((ret = ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL)) < 0) {
553                av_log(s->avctx, AV_LOG_ERROR,
554                       "\nerror while decoding intra block: %d x %d (%d)\n",
555                       s->mb_x, s->mb_y, i);
556                return ret;
557            }
558        }
559    }
560
561    return 0;
562}
563
564static av_cold int wmv2_decode_init(AVCodecContext *avctx)
565{
566    WMV2DecContext *const w = avctx->priv_data;
567    MpegEncContext *const s = &w->s;
568    int ret;
569
570    s->private_ctx = &w->common;
571
572    if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
573        return ret;
574
575    ff_wmv2_common_init(s);
576    ff_init_scantable(s->idsp.idct_permutation, &w->abt_scantable[0],
577                      ff_wmv2_scantableA);
578    ff_init_scantable(s->idsp.idct_permutation, &w->abt_scantable[1],
579                      ff_wmv2_scantableB);
580
581    return ff_intrax8_common_init(avctx, &w->x8, &w->s.idsp,
582                                  w->s.block, w->s.block_last_index,
583                                  w->s.mb_width, w->s.mb_height);
584}
585
586static av_cold int wmv2_decode_end(AVCodecContext *avctx)
587{
588    WMV2DecContext *const w = avctx->priv_data;
589
590    ff_intrax8_common_end(&w->x8);
591    return ff_h263_decode_end(avctx);
592}
593
594const FFCodec ff_wmv2_decoder = {
595    .p.name         = "wmv2",
596    .p.long_name    = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
597    .p.type         = AVMEDIA_TYPE_VIDEO,
598    .p.id           = AV_CODEC_ID_WMV2,
599    .priv_data_size = sizeof(WMV2DecContext),
600    .init           = wmv2_decode_init,
601    .close          = wmv2_decode_end,
602    FF_CODEC_DECODE_CB(ff_h263_decode_frame),
603    .p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
604    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
605    .p.pix_fmts     = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
606                                                     AV_PIX_FMT_NONE },
607};
608