FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/options.c
Date: 2024-07-26 21:54:09
Exec Total Coverage
Lines: 173 236 73.3%
Functions: 15 20 75.0%
Branches: 95 133 71.4%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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 #include "avformat.h"
21 #include "avio_internal.h"
22 #include "demux.h"
23 #include "internal.h"
24
25 #include "libavcodec/avcodec.h"
26 #include "libavcodec/codec_par.h"
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/iamf.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/intmath.h"
32 #include "libavutil/mem.h"
33 #include "libavutil/opt.h"
34
35 /**
36 * @file
37 * Options definition for AVFormatContext.
38 */
39
40 FF_DISABLE_DEPRECATION_WARNINGS
41 #include "options_table.h"
42 FF_ENABLE_DEPRECATION_WARNINGS
43
44 2538 static const char* format_to_name(void* ptr)
45 {
46 2538 AVFormatContext* fc = (AVFormatContext*) ptr;
47
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 2538 if(fc->iformat) return fc->iformat->name;
48
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 907 else if(fc->oformat) return fc->oformat->name;
49 ✗ else return fc->av_class->class_name;
50 }
51
52 53404 static void *format_child_next(void *obj, void *prev)
53 {
54 53404 AVFormatContext *s = obj;
55
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 53404 if (!prev && s->priv_data &&
56
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 21178 ((s->iformat && s->iformat->priv_class) ||
57
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 2494 s->oformat && s->oformat->priv_class))
58 18686 return s->priv_data;
59
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 34718 if (s->pb && s->pb->av_class && prev != s->pb)
60 13246 return s->pb;
61 21472 return NULL;
62 }
63
64 enum {
65 CHILD_CLASS_ITER_AVIO = 0,
66 CHILD_CLASS_ITER_MUX,
67 CHILD_CLASS_ITER_DEMUX,
68 CHILD_CLASS_ITER_DONE,
69
70 };
71
72 #define ITER_STATE_SHIFT 16
73
74 21523657 static const AVClass *format_child_class_iterate(void **iter)
75 {
76 // we use the low 16 bits of iter as the value to be passed to
77 // av_(de)muxer_iterate()
78 21523657 void *val = (void*)(((uintptr_t)*iter) & ((1 << ITER_STATE_SHIFT) - 1));
79 21523657 unsigned int state = ((uintptr_t)*iter) >> ITER_STATE_SHIFT;
80 21523657 const AVClass *ret = NULL;
81
82
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 21523657 if (state == CHILD_CLASS_ITER_AVIO) {
83 90936 ret = &ff_avio_class;
84 90936 state++;
85 90936 goto finish;
86 }
87
88
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 21432721 if (state == CHILD_CLASS_ITER_MUX) {
89 const AVOutputFormat *ofmt;
90
91
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 16991401 while ((ofmt = av_muxer_iterate(&val))) {
92 16900590 ret = ofmt->priv_class;
93
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 16900590 if (ret)
94 6632829 goto finish;
95 }
96
97 90811 val = NULL;
98 90811 state++;
99 }
100
101
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 14799892 if (state == CHILD_CLASS_ITER_DEMUX) {
102 const AVInputFormat *ifmt;
103
104
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 32869073 while ((ifmt = av_demuxer_iterate(&val))) {
105 32778292 ret = ifmt->priv_class;
106
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 32778292 if (ret)
107 14709111 goto finish;
108 }
109 90781 val = NULL;
110 90781 state++;
111 }
112
113 ✗ finish:
114 // make sure none av_(de)muxer_iterate does not set the high bits of val
115
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 21523657 av_assert0(!((uintptr_t)val >> ITER_STATE_SHIFT));
116 21523657 *iter = (void*)((uintptr_t)val | (state << ITER_STATE_SHIFT));
117 21523657 return ret;
118 }
119
120 2538 static AVClassCategory get_category(void *ptr)
121 {
122 2538 AVFormatContext* s = ptr;
123
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 2538 if(s->iformat) return AV_CLASS_CATEGORY_DEMUXER;
124 907 else return AV_CLASS_CATEGORY_MUXER;
125 }
126
127 static const AVClass av_format_context_class = {
128 .class_name = "AVFormatContext",
129 .item_name = format_to_name,
130 .option = avformat_options,
131 .version = LIBAVUTIL_VERSION_INT,
132 .child_next = format_child_next,
133 .child_class_iterate = format_child_class_iterate,
134 .category = AV_CLASS_CATEGORY_MUXER,
135 .get_category = get_category,
136 };
137
138 94416 static int io_open_default(AVFormatContext *s, AVIOContext **pb,
139 const char *url, int flags, AVDictionary **options)
140 {
141 int loglevel;
142
143
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 94416 if (!strcmp(url, s->url) ||
144
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 89955 s->iformat && !strcmp(s->iformat->name, "image2") ||
145
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 871 s->oformat && !strcmp(s->oformat->name, "image2")
146 ) {
147 94208 loglevel = AV_LOG_DEBUG;
148 } else
149 208 loglevel = AV_LOG_INFO;
150
151
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 94416 av_log(s, loglevel, "Opening \'%s\' for %s\n", url, flags & AVIO_FLAG_WRITE ? "writing" : "reading");
152
153 94416 return ffio_open_whitelist(pb, url, flags, &s->interrupt_callback, options, s->protocol_whitelist, s->protocol_blacklist);
154 }
155
156 89978 static int io_close2_default(AVFormatContext *s, AVIOContext *pb)
157 {
158 89978 return avio_close(pb);
159 }
160
161 14032 AVFormatContext *avformat_alloc_context(void)
162 {
163 14032 FFFormatContext *const si = av_mallocz(sizeof(*si));
164 AVFormatContext *s;
165
166
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 14032 if (!si)
167 ✗ return NULL;
168
169 14032 s = &si->pub;
170 14032 s->av_class = &av_format_context_class;
171 14032 s->io_open = io_open_default;
172 14032 s->io_close2= io_close2_default;
173
174 14032 av_opt_set_defaults(s);
175
176 14032 si->pkt = av_packet_alloc();
177 14032 si->parse_pkt = av_packet_alloc();
178
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 14032 if (!si->pkt || !si->parse_pkt) {
179 ✗ avformat_free_context(s);
180 ✗ return NULL;
181 }
182
183 #if FF_API_LAVF_SHORTEST
184 14032 si->shortest_end = AV_NOPTS_VALUE;
185 #endif
186
187 14032 return s;
188 }
189
190 #if FF_API_GET_DUR_ESTIMATE_METHOD
191 ✗ enum AVDurationEstimationMethod av_fmt_ctx_get_duration_estimation_method(const AVFormatContext* ctx)
192 {
193 ✗ return ctx->duration_estimation_method;
194 }
195 #endif
196
197 103719 const AVClass *avformat_get_class(void)
198 {
199 103719 return &av_format_context_class;
200 }
201
202 #define DISPOSITION_OPT(ctx) \
203 { "disposition", NULL, offsetof(ctx, disposition), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, \
204 .flags = AV_OPT_FLAG_ENCODING_PARAM, .unit = "disposition" }, \
205 { "default", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DEFAULT }, .unit = "disposition" }, \
206 { "dub", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DUB }, .unit = "disposition" }, \
207 { "original", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_ORIGINAL }, .unit = "disposition" }, \
208 { "comment", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_COMMENT }, .unit = "disposition" }, \
209 { "lyrics", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_LYRICS }, .unit = "disposition" }, \
210 { "karaoke", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_KARAOKE }, .unit = "disposition" }, \
211 { "forced", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_FORCED }, .unit = "disposition" }, \
212 { "hearing_impaired", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_HEARING_IMPAIRED }, .unit = "disposition" }, \
213 { "visual_impaired", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_VISUAL_IMPAIRED }, .unit = "disposition" }, \
214 { "clean_effects", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CLEAN_EFFECTS }, .unit = "disposition" }, \
215 { "attached_pic", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_ATTACHED_PIC }, .unit = "disposition" }, \
216 { "timed_thumbnails", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_TIMED_THUMBNAILS }, .unit = "disposition" }, \
217 { "non_diegetic", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_NON_DIEGETIC }, .unit = "disposition" }, \
218 { "captions", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CAPTIONS }, .unit = "disposition" }, \
219 { "descriptions", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DESCRIPTIONS }, .unit = "disposition" }, \
220 { "metadata", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_METADATA }, .unit = "disposition" }, \
221 { "dependent", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DEPENDENT }, .unit = "disposition" }, \
222 { "still_image", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_STILL_IMAGE }, .unit = "disposition" }, \
223 { "multilayer", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_MULTILAYER }, .unit = "disposition" }
224
225 static const AVOption stream_options[] = {
226 DISPOSITION_OPT(AVStream),
227 { "discard", NULL, offsetof(AVStream, discard), AV_OPT_TYPE_INT, { .i64 = AVDISCARD_DEFAULT }, INT_MIN, INT_MAX,
228 .flags = AV_OPT_FLAG_DECODING_PARAM, .unit = "avdiscard" },
229 { "none", .type = AV_OPT_TYPE_CONST, {.i64 = AVDISCARD_NONE }, .unit = "avdiscard" },
230 { "default", .type = AV_OPT_TYPE_CONST, {.i64 = AVDISCARD_DEFAULT }, .unit = "avdiscard" },
231 { "noref", .type = AV_OPT_TYPE_CONST, {.i64 = AVDISCARD_NONREF }, .unit = "avdiscard" },
232 { "bidir", .type = AV_OPT_TYPE_CONST, {.i64 = AVDISCARD_BIDIR }, .unit = "avdiscard" },
233 { "nointra", .type = AV_OPT_TYPE_CONST, {.i64 = AVDISCARD_NONINTRA }, .unit = "avdiscard" },
234 { "nokey", .type = AV_OPT_TYPE_CONST, {.i64 = AVDISCARD_NONKEY }, .unit = "avdiscard" },
235 { "all", .type = AV_OPT_TYPE_CONST, {.i64 = AVDISCARD_ALL }, .unit = "avdiscard" },
236 { NULL }
237 };
238
239 static const AVClass stream_class = {
240 .class_name = "AVStream",
241 .item_name = av_default_item_name,
242 .version = LIBAVUTIL_VERSION_INT,
243 .option = stream_options,
244 };
245
246 ✗ const AVClass *av_stream_get_class(void)
247 {
248 ✗ return &stream_class;
249 }
250
251 15158 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
252 {
253 15158 FFFormatContext *const si = ffformatcontext(s);
254 FFStream *sti;
255 AVStream *st;
256 AVStream **streams;
257
258
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 15158 if (s->nb_streams >= s->max_streams) {
259 ✗ av_log(s, AV_LOG_ERROR, "Number of streams exceeds max_streams parameter"
260 " (%d), see the documentation if you wish to increase it\n",
261 s->max_streams);
262 ✗ return NULL;
263 }
264 15158 streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
265
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 15158 if (!streams)
266 ✗ return NULL;
267 15158 s->streams = streams;
268
269 15158 sti = av_mallocz(sizeof(*sti));
270
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 15158 if (!sti)
271 ✗ return NULL;
272 15158 st = &sti->pub;
273
274 15158 st->av_class = &stream_class;
275 15158 st->codecpar = avcodec_parameters_alloc();
276
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 15158 if (!st->codecpar)
277 ✗ goto fail;
278
279 15158 sti->fmtctx = s;
280
281
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 15158 if (s->iformat) {
282 7930 sti->avctx = avcodec_alloc_context3(NULL);
283
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 7930 if (!sti->avctx)
284 ✗ goto fail;
285
286 7930 sti->info = av_mallocz(sizeof(*sti->info));
287
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 7930 if (!sti->info)
288 ✗ goto fail;
289
290 #if FF_API_R_FRAME_RATE
291 7930 sti->info->last_dts = AV_NOPTS_VALUE;
292 #endif
293 7930 sti->info->fps_first_dts = AV_NOPTS_VALUE;
294 7930 sti->info->fps_last_dts = AV_NOPTS_VALUE;
295
296 /* default pts setting is MPEG-like */
297 7930 avpriv_set_pts_info(st, 33, 1, 90000);
298 /* we set the current DTS to 0 so that formats without any timestamps
299 * but durations get some timestamps, formats with some unknown
300 * timestamps have their first few packets buffered and the
301 * timestamps corrected before they are returned to the user */
302 7930 sti->cur_dts = RELATIVE_TS_BASE;
303 } else {
304 7228 sti->cur_dts = AV_NOPTS_VALUE;
305 }
306
307 15158 st->index = s->nb_streams;
308 15158 st->start_time = AV_NOPTS_VALUE;
309 15158 st->duration = AV_NOPTS_VALUE;
310 15158 sti->first_dts = AV_NOPTS_VALUE;
311 15158 sti->probe_packets = s->max_probe_packets;
312 15158 sti->pts_wrap_reference = AV_NOPTS_VALUE;
313 15158 sti->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
314
315 15158 sti->last_IP_pts = AV_NOPTS_VALUE;
316 15158 sti->last_dts_for_order_check = AV_NOPTS_VALUE;
317
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 272844 for (int i = 0; i < MAX_REORDER_DELAY + 1; i++)
318 257686 sti->pts_buffer[i] = AV_NOPTS_VALUE;
319
320 15158 st->sample_aspect_ratio = (AVRational) { 0, 1 };
321 #if FF_API_INTERNAL_TIMING
322 15158 sti->transferred_mux_tb = (AVRational) { 0, 1 };;
323 #endif
324
325 #if FF_API_AVSTREAM_SIDE_DATA
326 15158 sti->inject_global_side_data = si->inject_global_side_data;
327 #endif
328
329 15158 sti->need_context_update = 1;
330
331 15158 s->streams[s->nb_streams++] = st;
332 15158 return st;
333 ✗ fail:
334 ✗ ff_free_stream(&st);
335 ✗ return NULL;
336 }
337
338 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
339 #define OFFSET(x) offsetof(AVStreamGroupTileGrid, x)
340 static const AVOption tile_grid_options[] = {
341 { "grid_size", "size of the output canvas", OFFSET(coded_width),
342 AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, INT_MAX, FLAGS },
343 { "output_size", "size of valid pixels in output image meant for presentation", OFFSET(width),
344 AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, INT_MAX, FLAGS },
345 { "background_color", "set a background color for unused pixels",
346 OFFSET(background), AV_OPT_TYPE_COLOR, { .str = "black"}, 0, 0, FLAGS },
347 { "horizontal_offset", NULL, OFFSET(horizontal_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
348 { "vertical_offset", NULL, OFFSET(vertical_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
349 { NULL },
350 };
351 #undef FLAGS
352 #undef OFFSET
353
354 static const AVClass tile_grid_class = {
355 .class_name = "AVStreamGroupTileGrid",
356 .version = LIBAVUTIL_VERSION_INT,
357 .option = tile_grid_options,
358 };
359
360 133 static void *stream_group_child_next(void *obj, void *prev)
361 {
362 133 AVStreamGroup *stg = obj;
363
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 133 if (!prev) {
364
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 75 switch(stg->type) {
365 37 case AV_STREAM_GROUP_PARAMS_IAMF_AUDIO_ELEMENT:
366 37 return stg->params.iamf_audio_element;
367 38 case AV_STREAM_GROUP_PARAMS_IAMF_MIX_PRESENTATION:
368 38 return stg->params.iamf_mix_presentation;
369 ✗ case AV_STREAM_GROUP_PARAMS_TILE_GRID:
370 ✗ return stg->params.tile_grid;
371 ✗ default:
372 ✗ break;
373 }
374 }
375 58 return NULL;
376 }
377
378 ✗ static const AVClass *stream_group_child_iterate(void **opaque)
379 {
380 ✗ uintptr_t i = (uintptr_t)*opaque;
381 ✗ const AVClass *ret = NULL;
382
383 ✗ switch(i) {
384 ✗ case AV_STREAM_GROUP_PARAMS_NONE:
385 ✗ i++;
386 // fall-through
387 ✗ case AV_STREAM_GROUP_PARAMS_IAMF_AUDIO_ELEMENT:
388 ✗ ret = av_iamf_audio_element_get_class();
389 ✗ break;
390 ✗ case AV_STREAM_GROUP_PARAMS_IAMF_MIX_PRESENTATION:
391 ✗ ret = av_iamf_mix_presentation_get_class();
392 ✗ break;
393 ✗ case AV_STREAM_GROUP_PARAMS_TILE_GRID:
394 ✗ ret = &tile_grid_class;
395 ✗ break;
396 ✗ default:
397 ✗ break;
398 }
399
400 ✗ if (ret)
401 ✗ *opaque = (void*)(i + 1);
402 ✗ return ret;
403 }
404
405 static const AVOption stream_group_options[] = {
406 DISPOSITION_OPT(AVStreamGroup),
407 {"id", "Set group id", offsetof(AVStreamGroup, id), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM },
408 { NULL }
409 };
410
411 static const AVClass stream_group_class = {
412 .class_name = "AVStreamGroup",
413 .item_name = av_default_item_name,
414 .version = LIBAVUTIL_VERSION_INT,
415 .option = stream_group_options,
416 .child_next = stream_group_child_next,
417 .child_class_iterate = stream_group_child_iterate,
418 };
419
420 ✗ const AVClass *av_stream_group_get_class(void)
421 {
422 ✗ return &stream_group_class;
423 }
424
425 66 AVStreamGroup *avformat_stream_group_create(AVFormatContext *s,
426 enum AVStreamGroupParamsType type,
427 AVDictionary **options)
428 {
429 AVStreamGroup **stream_groups;
430 AVStreamGroup *stg;
431 FFStreamGroup *stgi;
432
433 66 stream_groups = av_realloc_array(s->stream_groups, s->nb_stream_groups + 1,
434 sizeof(*stream_groups));
435
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 66 if (!stream_groups)
436 ✗ return NULL;
437 66 s->stream_groups = stream_groups;
438
439 66 stgi = av_mallocz(sizeof(*stgi));
440
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 66 if (!stgi)
441 ✗ return NULL;
442 66 stg = &stgi->pub;
443
444 66 stg->av_class = &stream_group_class;
445 66 av_opt_set_defaults(stg);
446 66 stg->type = type;
447
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 66 switch (type) {
448 30 case AV_STREAM_GROUP_PARAMS_IAMF_AUDIO_ELEMENT:
449 30 stg->params.iamf_audio_element = av_iamf_audio_element_alloc();
450
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 30 if (!stg->params.iamf_audio_element)
451 ✗ goto fail;
452 30 break;
453 30 case AV_STREAM_GROUP_PARAMS_IAMF_MIX_PRESENTATION:
454 30 stg->params.iamf_mix_presentation = av_iamf_mix_presentation_alloc();
455
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 30 if (!stg->params.iamf_mix_presentation)
456 ✗ goto fail;
457 30 break;
458 6 case AV_STREAM_GROUP_PARAMS_TILE_GRID:
459 6 stg->params.tile_grid = av_mallocz(sizeof(*stg->params.tile_grid));
460
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 6 if (!stg->params.tile_grid)
461 ✗ goto fail;
462 6 stg->params.tile_grid->av_class = &tile_grid_class;
463 6 av_opt_set_defaults(stg->params.tile_grid);
464 6 break;
465 ✗ default:
466 ✗ goto fail;
467 }
468
469
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 66 if (options) {
470
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 18 if (av_opt_set_dict2(stg, options, AV_OPT_SEARCH_CHILDREN))
471 ✗ goto fail;
472 }
473
474 66 stgi->fmtctx = s;
475 66 stg->index = s->nb_stream_groups;
476
477 66 s->stream_groups[s->nb_stream_groups++] = stg;
478
479 66 return stg;
480 ✗ fail:
481 ✗ ff_free_stream_group(&stg);
482 ✗ return NULL;
483 }
484
485 278 static int stream_group_add_stream(AVStreamGroup *stg, AVStream *st)
486 {
487 278 AVStream **streams = av_realloc_array(stg->streams, stg->nb_streams + 1,
488 sizeof(*stg->streams));
489
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 278 if (!streams)
490 ✗ return AVERROR(ENOMEM);
491
492 278 stg->streams = streams;
493 278 stg->streams[stg->nb_streams++] = st;
494
495 278 return 0;
496 }
497
498 284 int avformat_stream_group_add_stream(AVStreamGroup *stg, AVStream *st)
499 {
500 284 const FFStreamGroup *stgi = cffstreamgroup(stg);
501 284 const FFStream *sti = cffstream(st);
502
503
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 284 if (stgi->fmtctx != sti->fmtctx)
504 ✗ return AVERROR(EINVAL);
505
506
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 874 for (int i = 0; i < stg->nb_streams; i++)
507
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 596 if (stg->streams[i]->index == st->index)
508 6 return AVERROR(EEXIST);
509
510 278 return stream_group_add_stream(stg, st);
511 }
512
513 112270 static int option_is_disposition(const AVOption *opt)
514 {
515 215682 return opt->type == AV_OPT_TYPE_CONST &&
516
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 112270 opt->unit && !strcmp(opt->unit, "disposition");
517 }
518
519 ✗ int av_disposition_from_string(const char *disp)
520 {
521 ✗ for (const AVOption *opt = stream_options; opt->name; opt++)
522 ✗ if (option_is_disposition(opt) && !strcmp(disp, opt->name))
523 ✗ return opt->default_val.i64;
524 ✗ return AVERROR(EINVAL);
525 }
526
527 6592 const char *av_disposition_to_string(int disposition)
528 {
529 int val;
530
531
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 6592 if (disposition <= 0)
532 206 return NULL;
533
534 6386 val = 1 << ff_ctz(disposition);
535
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 114742 for (const AVOption *opt = stream_options; opt->name; opt++)
536
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 112270 if (option_is_disposition(opt) && opt->default_val.i64 == val)
537 3914 return opt->name;
538
539 2472 return NULL;
540 }
541