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options.c
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1 /*
2  * Copyright (c) 2001 Fabrice Bellard
3  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Options definition for AVCodecContext.
25  */
26 
27 #include "avcodec.h"
28 #include "internal.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/mem.h"
32 #include "libavutil/opt.h"
33 #include <string.h>
34 
36 #include "options_table.h"
38 
39 static const char* context_to_name(void* ptr) {
40  AVCodecContext *avc= ptr;
41 
42  if(avc && avc->codec && avc->codec->name)
43  return avc->codec->name;
44  else
45  return "NULL";
46 }
47 
48 static void *codec_child_next(void *obj, void *prev)
49 {
50  AVCodecContext *s = obj;
51  if (!prev && s->codec && s->codec->priv_class && s->priv_data)
52  return s->priv_data;
53  return NULL;
54 }
55 
56 static const AVClass *codec_child_class_next(const AVClass *prev)
57 {
58  AVCodec *c = NULL;
59 
60  /* find the codec that corresponds to prev */
61  while (prev && (c = av_codec_next(c)))
62  if (c->priv_class == prev)
63  break;
64 
65  /* find next codec with priv options */
66  while (c = av_codec_next(c))
67  if (c->priv_class)
68  return c->priv_class;
69  return NULL;
70 }
71 
72 static AVClassCategory get_category(void *ptr)
73 {
74  AVCodecContext* avctx = ptr;
75  if(avctx->codec && avctx->codec->decode) return AV_CLASS_CATEGORY_DECODER;
76  else return AV_CLASS_CATEGORY_ENCODER;
77 }
78 
80  .class_name = "AVCodecContext",
81  .item_name = context_to_name,
82  .option = avcodec_options,
83  .version = LIBAVUTIL_VERSION_INT,
84  .log_level_offset_offset = offsetof(AVCodecContext, log_level_offset),
85  .child_next = codec_child_next,
86  .child_class_next = codec_child_class_next,
88  .get_category = get_category,
89 };
90 
91 static int init_context_defaults(AVCodecContext *s, const AVCodec *codec)
92 {
93  int flags=0;
94  memset(s, 0, sizeof(AVCodecContext));
95 
97 
98  s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN;
99  if (codec) {
100  s->codec = codec;
101  s->codec_id = codec->id;
102  }
103 
106  else if(s->codec_type == AVMEDIA_TYPE_VIDEO)
108  else if(s->codec_type == AVMEDIA_TYPE_SUBTITLE)
110  av_opt_set_defaults2(s, flags, flags);
111 
112  s->time_base = (AVRational){0,1};
113  s->framerate = (AVRational){ 0, 1 };
114  s->pkt_timebase = (AVRational){ 0, 1 };
119  s->sample_aspect_ratio = (AVRational){0,1};
123 
125  if(codec && codec->priv_data_size){
126  if(!s->priv_data){
127  s->priv_data= av_mallocz(codec->priv_data_size);
128  if (!s->priv_data) {
129  return AVERROR(ENOMEM);
130  }
131  }
132  if(codec->priv_class){
133  *(const AVClass**)s->priv_data = codec->priv_class;
135  }
136  }
137  if (codec && codec->defaults) {
138  int ret;
139  const AVCodecDefault *d = codec->defaults;
140  while (d->key) {
141  ret = av_opt_set(s, d->key, d->value, 0);
142  av_assert0(ret >= 0);
143  d++;
144  }
145  }
146  return 0;
147 }
148 
149 #if FF_API_GET_CONTEXT_DEFAULTS
151 {
152  return init_context_defaults(s, codec);
153 }
154 #endif
155 
157 {
158  AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
159 
160  if (!avctx)
161  return NULL;
162 
163  if (init_context_defaults(avctx, codec) < 0) {
164  av_free(avctx);
165  return NULL;
166  }
167 
168  return avctx;
169 }
170 
172 {
173  AVCodecContext *avctx = *pavctx;
174 
175  if (!avctx)
176  return;
177 
178  avcodec_close(avctx);
179 
180  av_freep(&avctx->extradata);
181  av_freep(&avctx->subtitle_header);
182  av_freep(&avctx->intra_matrix);
183  av_freep(&avctx->inter_matrix);
184  av_freep(&avctx->rc_override);
185 
186  av_freep(pavctx);
187 }
188 
189 #if FF_API_COPY_CONTEXT
191 {
192  int i;
193 
194  av_opt_free(avctx);
195 #if FF_API_CODED_FRAME
197  av_frame_free(&avctx->coded_frame);
199 #endif
200  av_freep(&avctx->rc_override);
201  av_freep(&avctx->intra_matrix);
202  av_freep(&avctx->inter_matrix);
203  av_freep(&avctx->extradata);
204  av_freep(&avctx->subtitle_header);
207  for (i = 0; i < avctx->nb_coded_side_data; i++)
208  av_freep(&avctx->coded_side_data[i].data);
209  av_freep(&avctx->coded_side_data);
210  avctx->subtitle_header_size = 0;
211  avctx->nb_coded_side_data = 0;
212  avctx->extradata_size = 0;
213 }
214 
216 {
217  const AVCodec *orig_codec = dest->codec;
218  uint8_t *orig_priv_data = dest->priv_data;
219 
220  if (avcodec_is_open(dest)) { // check that the dest context is uninitialized
221  av_log(dest, AV_LOG_ERROR,
222  "Tried to copy AVCodecContext %p into already-initialized %p\n",
223  src, dest);
224  return AVERROR(EINVAL);
225  }
226 
227  copy_context_reset(dest);
228 
229  memcpy(dest, src, sizeof(*dest));
230  av_opt_copy(dest, src);
231 
232  dest->priv_data = orig_priv_data;
233  dest->codec = orig_codec;
234 
235  if (orig_priv_data && src->codec && src->codec->priv_class &&
236  dest->codec && dest->codec->priv_class)
237  av_opt_copy(orig_priv_data, src->priv_data);
238 
239 
240  /* set values specific to opened codecs back to their default state */
241  dest->slice_offset = NULL;
242  dest->hwaccel = NULL;
243  dest->internal = NULL;
244 #if FF_API_CODED_FRAME
246  dest->coded_frame = NULL;
248 #endif
249 
250  /* reallocate values that should be allocated separately */
251  dest->extradata = NULL;
252  dest->coded_side_data = NULL;
253  dest->intra_matrix = NULL;
254  dest->inter_matrix = NULL;
255  dest->rc_override = NULL;
256  dest->subtitle_header = NULL;
257  dest->hw_frames_ctx = NULL;
258  dest->hw_device_ctx = NULL;
259  dest->nb_coded_side_data = 0;
260 
261 #define alloc_and_copy_or_fail(obj, size, pad) \
262  if (src->obj && size > 0) { \
263  dest->obj = av_malloc(size + pad); \
264  if (!dest->obj) \
265  goto fail; \
266  memcpy(dest->obj, src->obj, size); \
267  if (pad) \
268  memset(((uint8_t *) dest->obj) + size, 0, pad); \
269  }
270  alloc_and_copy_or_fail(extradata, src->extradata_size,
272  dest->extradata_size = src->extradata_size;
273  alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0);
274  alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0);
275  alloc_and_copy_or_fail(rc_override, src->rc_override_count * sizeof(*src->rc_override), 0);
276  alloc_and_copy_or_fail(subtitle_header, src->subtitle_header_size, 1);
278 #undef alloc_and_copy_or_fail
279 
280  if (src->hw_frames_ctx) {
282  if (!dest->hw_frames_ctx)
283  goto fail;
284  }
285 
286  return 0;
287 
288 fail:
289  copy_context_reset(dest);
290  return AVERROR(ENOMEM);
291 }
292 #endif
293 
295 {
296  return &av_codec_context_class;
297 }
298 
299 #define FOFFSET(x) offsetof(AVFrame,x)
300 
301 static const AVOption frame_options[]={
302 {"best_effort_timestamp", "", FOFFSET(best_effort_timestamp), AV_OPT_TYPE_INT64, {.i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0},
303 {"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
304 {"pkt_size", "", FOFFSET(pkt_size), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
305 {"sample_aspect_ratio", "", FOFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0},
306 {"width", "", FOFFSET(width), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
307 {"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
308 {"format", "", FOFFSET(format), AV_OPT_TYPE_INT, {.i64 = -1 }, 0, INT_MAX, 0},
309 {"channel_layout", "", FOFFSET(channel_layout), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, 0},
310 {"sample_rate", "", FOFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
311 {NULL},
312 };
313 
314 static const AVClass av_frame_class = {
315  .class_name = "AVFrame",
316  .item_name = NULL,
317  .option = frame_options,
318  .version = LIBAVUTIL_VERSION_INT,
319 };
320 
322 {
323  return &av_frame_class;
324 }
325 
326 #define SROFFSET(x) offsetof(AVSubtitleRect,x)
327 
329 {"x", "", SROFFSET(x), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
330 {"y", "", SROFFSET(y), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
331 {"w", "", SROFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
332 {"h", "", SROFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
333 {"type", "", SROFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
334 {"flags", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0, "flags"},
335 {"forced", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0},
336 {NULL},
337 };
338 
340  .class_name = "AVSubtitleRect",
341  .item_name = NULL,
342  .option = subtitle_rect_options,
343  .version = LIBAVUTIL_VERSION_INT,
344 };
345 
347 {
348  return &av_subtitle_rect_class;
349 }
350 
351 #ifdef TEST
352 static int dummy_init(AVCodecContext *ctx)
353 {
354  //TODO: this code should set every possible pointer that could be set by codec and is not an option;
355  ctx->extradata_size = 8;
356  ctx->extradata = av_malloc(ctx->extradata_size);
357  return 0;
358 }
359 
360 static int dummy_close(AVCodecContext *ctx)
361 {
362  av_freep(&ctx->extradata);
363  ctx->extradata_size = 0;
364  return 0;
365 }
366 
367 static int dummy_encode(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
368 {
369  return AVERROR(ENOSYS);
370 }
371 
372 typedef struct Dummy12Context {
373  AVClass *av_class;
374  int num;
375  char* str;
377 
378 typedef struct Dummy3Context {
379  void *fake_av_class;
380  int num;
381  char* str;
382 } Dummy3Context;
383 
384 #define OFFSET(x) offsetof(Dummy12Context, x)
385 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
386 static const AVOption dummy_options[] = {
387  { "str", "set str", OFFSET(str), AV_OPT_TYPE_STRING, { .str = "i'm src default value" }, 0, 0, VE},
388  { "num", "set num", OFFSET(num), AV_OPT_TYPE_INT, { .i64 = 1500100900 }, 0, INT_MAX, VE},
389  { NULL },
390 };
391 
392 static const AVClass dummy_v1_class = {
393  .class_name = "dummy_v1_class",
394  .item_name = av_default_item_name,
395  .option = dummy_options,
396  .version = LIBAVUTIL_VERSION_INT,
397 };
398 
399 static const AVClass dummy_v2_class = {
400  .class_name = "dummy_v2_class",
401  .item_name = av_default_item_name,
402  .option = dummy_options,
403  .version = LIBAVUTIL_VERSION_INT,
404 };
405 
406 /* codec with options */
407 static AVCodec dummy_v1_encoder = {
408  .name = "dummy_v1_codec",
409  .type = AVMEDIA_TYPE_VIDEO,
410  .id = AV_CODEC_ID_NONE - 1,
411  .encode2 = dummy_encode,
412  .init = dummy_init,
413  .close = dummy_close,
414  .priv_class = &dummy_v1_class,
415  .priv_data_size = sizeof(Dummy12Context),
416 };
417 
418 /* codec with options, different class */
419 static AVCodec dummy_v2_encoder = {
420  .name = "dummy_v2_codec",
421  .type = AVMEDIA_TYPE_VIDEO,
422  .id = AV_CODEC_ID_NONE - 2,
423  .encode2 = dummy_encode,
424  .init = dummy_init,
425  .close = dummy_close,
426  .priv_class = &dummy_v2_class,
427  .priv_data_size = sizeof(Dummy12Context),
428 };
429 
430 /* codec with priv data, but no class */
431 static AVCodec dummy_v3_encoder = {
432  .name = "dummy_v3_codec",
433  .type = AVMEDIA_TYPE_VIDEO,
434  .id = AV_CODEC_ID_NONE - 3,
435  .encode2 = dummy_encode,
436  .init = dummy_init,
437  .close = dummy_close,
438  .priv_data_size = sizeof(Dummy3Context),
439 };
440 
441 /* codec without priv data */
442 static AVCodec dummy_v4_encoder = {
443  .name = "dummy_v4_codec",
444  .type = AVMEDIA_TYPE_VIDEO,
445  .id = AV_CODEC_ID_NONE - 4,
446  .encode2 = dummy_encode,
447  .init = dummy_init,
448  .close = dummy_close,
449 };
450 
451 static void test_copy_print_codec(const AVCodecContext *ctx)
452 {
453  printf("%-14s: %dx%d prv: %s",
454  ctx->codec ? ctx->codec->name : "NULL",
455  ctx->width, ctx->height,
456  ctx->priv_data ? "set" : "null");
457  if (ctx->codec && ctx->codec->priv_class && ctx->codec->priv_data_size) {
458  int64_t i64;
459  char *str = NULL;
460  av_opt_get_int(ctx->priv_data, "num", 0, &i64);
461  av_opt_get(ctx->priv_data, "str", 0, (uint8_t**)&str);
462  printf(" opts: %"PRId64" %s", i64, str);
463  av_free(str);
464  }
465  printf("\n");
466 }
467 
468 static void test_copy(const AVCodec *c1, const AVCodec *c2)
469 {
470  AVCodecContext *ctx1, *ctx2;
471  printf("%s -> %s\nclosed:\n", c1 ? c1->name : "NULL", c2 ? c2->name : "NULL");
472  ctx1 = avcodec_alloc_context3(c1);
473  ctx2 = avcodec_alloc_context3(c2);
474  ctx1->width = ctx1->height = 128;
475  if (ctx2->codec && ctx2->codec->priv_class && ctx2->codec->priv_data_size) {
476  av_opt_set(ctx2->priv_data, "num", "667", 0);
477  av_opt_set(ctx2->priv_data, "str", "i'm dest value before copy", 0);
478  }
479  avcodec_copy_context(ctx2, ctx1);
480  test_copy_print_codec(ctx1);
481  test_copy_print_codec(ctx2);
482  if (ctx1->codec) {
483  printf("opened:\n");
484  avcodec_open2(ctx1, ctx1->codec, NULL);
485  if (ctx2->codec && ctx2->codec->priv_class && ctx2->codec->priv_data_size) {
486  av_opt_set(ctx2->priv_data, "num", "667", 0);
487  av_opt_set(ctx2->priv_data, "str", "i'm dest value before copy", 0);
488  }
489  avcodec_copy_context(ctx2, ctx1);
490  test_copy_print_codec(ctx1);
491  test_copy_print_codec(ctx2);
492  avcodec_close(ctx1);
493  }
494  avcodec_free_context(&ctx1);
495  avcodec_free_context(&ctx2);
496 }
497 
498 int main(void)
499 {
500  AVCodec *dummy_codec[] = {
505  NULL,
506  };
507  int i, j;
508 
509  for (i = 0; dummy_codec[i]; i++)
510  avcodec_register(dummy_codec[i]);
511 
512  printf("testing avcodec_copy_context()\n");
513  for (i = 0; i < FF_ARRAY_ELEMS(dummy_codec); i++)
514  for (j = 0; j < FF_ARRAY_ELEMS(dummy_codec); j++)
515  test_copy(dummy_codec[i], dummy_codec[j]);
516  return 0;
517 }
518 #endif
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1541
AVRational framerate
Definition: avcodec.h:3055
int main(void)
Definition: options.c:176
static AVCodec dummy_v3_encoder
Definition: options.c:103
static const char * format[]
Definition: af_aiir.c:330
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
int avcodec_default_execute2(AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2, int, int), void *arg, int *ret, int count)
AVOption.
Definition: opt.h:246
#define AV_OPT_FLAG_SUBTITLE_PARAM
Definition: opt.h:280
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
Memory handling functions.
AVCodec * av_codec_next(const AVCodec *c)
If c is NULL, returns the first registered codec, if c is non-NULL, returns the next registered codec...
Definition: allcodecs.c:826
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1305
#define AV_OPT_FLAG_AUDIO_PARAM
Definition: opt.h:278
char * str
Definition: options.c:53
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1911
static const AVOption avcodec_options[]
Definition: options_table.h:44
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1742
enum AVMediaType type
Definition: avcodec.h:3436
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
int(* decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt)
Definition: avcodec.h:3521
static void test_copy(const AVCodec *c1, const AVCodec *c2)
Definition: options.c:140
static AVPacket pkt
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2689
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3423
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1655
static void copy_context_reset(AVCodecContext *avctx)
Definition: options.c:190
const AVClass * avcodec_get_class(void)
Get the AVClass for AVCodecContext.
Definition: options.c:294
static const AVClass av_codec_context_class
Definition: options.c:79
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static int init_context_defaults(AVCodecContext *s, const AVCodec *codec)
Definition: options.c:91
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
Definition: decode.c:1118
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2196
uint8_t
#define av_malloc(s)
static const AVOption subtitle_rect_options[]
Definition: options.c:328
AVOptions.
int subtitle_header_size
Definition: avcodec.h:3001
static AVCodec dummy_v1_encoder
Definition: options.c:79
AVClass * av_class
Definition: options.c:45
void * fake_av_class
Definition: options.c:51
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1633
const AVClass * av_class
information on struct for av_log
Definition: avcodec.h:1537
static AVFrame * frame
static const AVClass av_subtitle_rect_class
Definition: options.c:339
#define height
static const uint64_t c1
Definition: murmur3.c:49
uint8_t * data
Definition: avcodec.h:1388
av_cold void avcodec_register(AVCodec *codec)
Register the codec codec and initialize libavcodec.
Definition: allcodecs.c:821
const AVClass * avcodec_get_frame_class(void)
Get the AVClass for AVFrame.
Definition: options.c:321
static int dummy_init(AVCodecContext *ctx)
Definition: options.c:24
#define av_log(a,...)
int avcodec_close(AVCodecContext *avctx)
Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...
Definition: utils.c:1069
AVRational pkt_timebase
Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
Definition: avcodec.h:3069
enum AVCodecID id
Definition: avcodec.h:3437
const AVCodecDefault * defaults
Private codec-specific defaults.
Definition: avcodec.h:3496
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
char * str
Definition: options.c:47
int avcodec_is_open(AVCodecContext *s)
Definition: utils.c:1870
static void * codec_child_next(void *obj, void *prev)
Definition: options.c:48
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3430
AVClassCategory category
Category used for visualization (like color) This is only set if the category is equal for all object...
Definition: log.h:130
#define fail()
Definition: checkasm.h:117
static void test_copy_print_codec(const AVCodecContext *ctx)
Definition: options.c:123
common internal API header
int rc_override_count
ratecontrol override, see RcOverride
Definition: avcodec.h:2398
AVPacketSideData * coded_side_data
Additional data associated with the entire coded stream.
Definition: avcodec.h:3187
static const AVClass dummy_v1_class
Definition: options.c:64
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
Definition: options.c:215
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:156
#define width
#define OFFSET(x)
Definition: options.c:56
int width
picture width / height.
Definition: avcodec.h:1705
uint8_t w
Definition: llviddspenc.c:38
AVBufferRef * hw_frames_ctx
A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames...
Definition: avcodec.h:3212
static const AVOption dummy_options[]
Definition: options.c:58
int priv_data_size
Definition: avcodec.h:3471
AVFormatContext * ctx
Definition: movenc.c:48
static const AVClass * codec_child_class_next(const AVClass *prev)
Definition: options.c:56
static const AVClass dummy_v2_class
Definition: options.c:71
const AVClass * avcodec_get_subtitle_rect_class(void)
Get the AVClass for AVSubtitleRect.
Definition: options.c:346
#define s(width, name)
Definition: cbs_vp9.c:257
void av_opt_set_defaults2(void *s, int mask, int flags)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1310
int64_t reordered_opaque
opaque 64-bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque
Definition: avcodec.h:2682
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
static AVCodec dummy_v2_encoder
Definition: options.c:91
RcOverride * rc_override
Definition: avcodec.h:2399
#define FF_ARRAY_ELEMS(a)
int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
Definition: opt.c:888
sample_rate
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
Definition: decode.c:1660
#define SROFFSET(x)
Definition: options.c:326
Libavcodec external API header.
enum AVMediaType codec_type
Definition: avcodec.h:1540
void avcodec_free_context(AVCodecContext **pavctx)
Free the codec context and everything associated with it and write NULL to the provided pointer...
Definition: options.c:171
enum AVCodecID codec_id
Definition: avcodec.h:1542
#define AV_OPT_FLAG_VIDEO_PARAM
Definition: opt.h:279
main external API structure.
Definition: avcodec.h:1532
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1634
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:2030
int nb_coded_side_data
Definition: avcodec.h:3188
Describe the class of an AVClass context structure.
Definition: log.h:67
enum AVPixelFormat(* get_format)(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
callback to negotiate the pixelFormat
Definition: avcodec.h:1784
#define VE
Definition: options.c:57
Rational number (pair of numerator and denominator).
Definition: rational.h:58
static int dummy_close(AVCodecContext *ctx)
Definition: options.c:32
int(* get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags)
This callback is called at the beginning of each frame to get data buffer(s) for it.
Definition: avcodec.h:2343
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: utils.c:538
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:2037
#define flags(name, subs,...)
Definition: cbs_av1.c:596
const AVClass * priv_class
AVClass for the private context.
Definition: avcodec.h:3449
const uint8_t * key
Definition: internal.h:224
const uint8_t * value
Definition: internal.h:225
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1558
static const AVOption frame_options[]
Definition: options.c:301
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
common internal api header.
static double c[64]
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
int av_opt_copy(void *dst, const void *src)
Copy options from src object into dest object.
Definition: opt.c:1716
static AVClassCategory get_category(void *ptr)
Definition: options.c:72
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2775
static const uint64_t c2
Definition: murmur3.c:50
static const AVClass av_frame_class
Definition: options.c:314
int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec)
Definition: options.c:150
static AVCodec dummy_v4_encoder
Definition: options.c:114
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:781
void * priv_data
Definition: avcodec.h:1559
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:761
#define av_free(p)
AVClassCategory
Definition: log.h:29
int(* execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
The codec may call this to execute several independent things.
Definition: avcodec.h:2824
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
#define alloc_and_copy_or_fail(obj, size, pad)
int(* execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
The codec may call this to execute several independent things.
Definition: avcodec.h:2844
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1567
FF_DISABLE_DEPRECATION_WARNINGS static FF_ENABLE_DEPRECATION_WARNINGS const char * context_to_name(void *ptr)
Definition: options.c:39
int * slice_offset
slice offsets in the frame in bytes
Definition: avcodec.h:1902
#define av_freep(p)
AVBufferRef * hw_device_ctx
A reference to the AVHWDeviceContext describing the device which will be used by a hardware encoder/d...
Definition: avcodec.h:3264
This structure stores compressed data.
Definition: avcodec.h:1421
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:449
enum AVPixelFormat sw_pix_fmt
Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:3062
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define FOFFSET(x)
Definition: options.c:299
int avcodec_default_execute(AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
Definition: utils.c:431
uint8_t * subtitle_header
Header containing style information for text subtitles.
Definition: avcodec.h:3000
static int dummy_encode(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: options.c:39