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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 <float.h> /* FLT_MIN, FLT_MAX */
34 #include <string.h>
35 
37 #include "options_table.h"
39 
40 static const char* context_to_name(void* ptr) {
41  AVCodecContext *avc= ptr;
42 
43  if(avc && avc->codec && avc->codec->name)
44  return avc->codec->name;
45  else
46  return "NULL";
47 }
48 
49 static void *codec_child_next(void *obj, void *prev)
50 {
51  AVCodecContext *s = obj;
52  if (!prev && s->codec && s->codec->priv_class && s->priv_data)
53  return s->priv_data;
54  return NULL;
55 }
56 
57 static const AVClass *codec_child_class_next(const AVClass *prev)
58 {
59  AVCodec *c = NULL;
60 
61  /* find the codec that corresponds to prev */
62  while (prev && (c = av_codec_next(c)))
63  if (c->priv_class == prev)
64  break;
65 
66  /* find next codec with priv options */
67  while (c = av_codec_next(c))
68  if (c->priv_class)
69  return c->priv_class;
70  return NULL;
71 }
72 
73 static AVClassCategory get_category(void *ptr)
74 {
75  AVCodecContext* avctx = ptr;
76  if(avctx->codec && avctx->codec->decode) return AV_CLASS_CATEGORY_DECODER;
77  else return AV_CLASS_CATEGORY_ENCODER;
78 }
79 
81  .class_name = "AVCodecContext",
82  .item_name = context_to_name,
83  .option = avcodec_options,
84  .version = LIBAVUTIL_VERSION_INT,
85  .log_level_offset_offset = offsetof(AVCodecContext, log_level_offset),
86  .child_next = codec_child_next,
87  .child_class_next = codec_child_class_next,
89  .get_category = get_category,
90 };
91 
92 static int init_context_defaults(AVCodecContext *s, const AVCodec *codec)
93 {
94  int flags=0;
95  memset(s, 0, sizeof(AVCodecContext));
96 
98 
99  s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN;
100  if (codec) {
101  s->codec = codec;
102  s->codec_id = codec->id;
103  }
104 
107  else if(s->codec_type == AVMEDIA_TYPE_VIDEO)
109  else if(s->codec_type == AVMEDIA_TYPE_SUBTITLE)
111  av_opt_set_defaults2(s, flags, flags);
112 
113  s->time_base = (AVRational){0,1};
114  s->framerate = (AVRational){ 0, 1 };
115  s->pkt_timebase = (AVRational){ 0, 1 };
120  s->sample_aspect_ratio = (AVRational){0,1};
124 
126  if(codec && codec->priv_data_size){
127  if(!s->priv_data){
128  s->priv_data= av_mallocz(codec->priv_data_size);
129  if (!s->priv_data) {
130  return AVERROR(ENOMEM);
131  }
132  }
133  if(codec->priv_class){
134  *(const AVClass**)s->priv_data = codec->priv_class;
136  }
137  }
138  if (codec && codec->defaults) {
139  int ret;
140  const AVCodecDefault *d = codec->defaults;
141  while (d->key) {
142  ret = av_opt_set(s, d->key, d->value, 0);
143  av_assert0(ret >= 0);
144  d++;
145  }
146  }
147  return 0;
148 }
149 
150 #if FF_API_GET_CONTEXT_DEFAULTS
152 {
153  return init_context_defaults(s, codec);
154 }
155 #endif
156 
158 {
159  AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
160 
161  if (!avctx)
162  return NULL;
163 
164  if (init_context_defaults(avctx, codec) < 0) {
165  av_free(avctx);
166  return NULL;
167  }
168 
169  return avctx;
170 }
171 
173 {
174  AVCodecContext *avctx = *pavctx;
175 
176  if (!avctx)
177  return;
178 
179  avcodec_close(avctx);
180 
181  av_freep(&avctx->extradata);
182  av_freep(&avctx->subtitle_header);
183  av_freep(&avctx->intra_matrix);
184  av_freep(&avctx->inter_matrix);
185  av_freep(&avctx->rc_override);
186 
187  av_freep(pavctx);
188 }
189 
190 #if FF_API_COPY_CONTEXT
192 {
193  const AVCodec *orig_codec = dest->codec;
194  uint8_t *orig_priv_data = dest->priv_data;
195 
196  if (avcodec_is_open(dest)) { // check that the dest context is uninitialized
197  av_log(dest, AV_LOG_ERROR,
198  "Tried to copy AVCodecContext %p into already-initialized %p\n",
199  src, dest);
200  return AVERROR(EINVAL);
201  }
202 
203  av_opt_free(dest);
204  av_freep(&dest->rc_override);
205  av_freep(&dest->intra_matrix);
206  av_freep(&dest->inter_matrix);
207  av_freep(&dest->extradata);
208  av_freep(&dest->subtitle_header);
209 
210  memcpy(dest, src, sizeof(*dest));
211  av_opt_copy(dest, src);
212 
213  dest->priv_data = orig_priv_data;
214  dest->codec = orig_codec;
215 
216  if (orig_priv_data && src->codec && src->codec->priv_class &&
217  dest->codec && dest->codec->priv_class)
218  av_opt_copy(orig_priv_data, src->priv_data);
219 
220 
221  /* set values specific to opened codecs back to their default state */
222  dest->slice_offset = NULL;
223  dest->hwaccel = NULL;
224  dest->internal = NULL;
225 #if FF_API_CODED_FRAME
227  dest->coded_frame = NULL;
229 #endif
230 
231  /* reallocate values that should be allocated separately */
232  dest->extradata = NULL;
233  dest->intra_matrix = NULL;
234  dest->inter_matrix = NULL;
235  dest->rc_override = NULL;
236  dest->subtitle_header = NULL;
237  dest->hw_frames_ctx = NULL;
238 
239 #define alloc_and_copy_or_fail(obj, size, pad) \
240  if (src->obj && size > 0) { \
241  dest->obj = av_malloc(size + pad); \
242  if (!dest->obj) \
243  goto fail; \
244  memcpy(dest->obj, src->obj, size); \
245  if (pad) \
246  memset(((uint8_t *) dest->obj) + size, 0, pad); \
247  }
248  alloc_and_copy_or_fail(extradata, src->extradata_size,
250  dest->extradata_size = src->extradata_size;
251  alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0);
252  alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0);
253  alloc_and_copy_or_fail(rc_override, src->rc_override_count * sizeof(*src->rc_override), 0);
254  alloc_and_copy_or_fail(subtitle_header, src->subtitle_header_size, 1);
256 #undef alloc_and_copy_or_fail
257 
258  if (src->hw_frames_ctx) {
260  if (!dest->hw_frames_ctx)
261  goto fail;
262  }
263 
264  return 0;
265 
266 fail:
267  av_freep(&dest->subtitle_header);
268  av_freep(&dest->rc_override);
269  av_freep(&dest->intra_matrix);
270  av_freep(&dest->inter_matrix);
271  av_freep(&dest->extradata);
273  dest->subtitle_header_size = 0;
274  dest->extradata_size = 0;
275  av_opt_free(dest);
276  return AVERROR(ENOMEM);
277 }
278 #endif
279 
281 {
282  return &av_codec_context_class;
283 }
284 
285 #define FOFFSET(x) offsetof(AVFrame,x)
286 
287 static const AVOption frame_options[]={
288 {"best_effort_timestamp", "", FOFFSET(best_effort_timestamp), AV_OPT_TYPE_INT64, {.i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0},
289 {"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
290 {"pkt_size", "", FOFFSET(pkt_size), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
291 {"sample_aspect_ratio", "", FOFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0},
292 {"width", "", FOFFSET(width), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
293 {"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
294 {"format", "", FOFFSET(format), AV_OPT_TYPE_INT, {.i64 = -1 }, 0, INT_MAX, 0},
295 {"channel_layout", "", FOFFSET(channel_layout), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, 0},
296 {"sample_rate", "", FOFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
297 {NULL},
298 };
299 
300 static const AVClass av_frame_class = {
301  .class_name = "AVFrame",
302  .item_name = NULL,
303  .option = frame_options,
304  .version = LIBAVUTIL_VERSION_INT,
305 };
306 
308 {
309  return &av_frame_class;
310 }
311 
312 #define SROFFSET(x) offsetof(AVSubtitleRect,x)
313 
315 {"x", "", SROFFSET(x), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
316 {"y", "", SROFFSET(y), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
317 {"w", "", SROFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
318 {"h", "", SROFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
319 {"type", "", SROFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
320 {"flags", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0, "flags"},
321 {"forced", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0},
322 {NULL},
323 };
324 
326  .class_name = "AVSubtitleRect",
327  .item_name = NULL,
328  .option = subtitle_rect_options,
329  .version = LIBAVUTIL_VERSION_INT,
330 };
331 
333 {
334  return &av_subtitle_rect_class;
335 }
336 
337 #ifdef TEST
338 static int dummy_init(AVCodecContext *ctx)
339 {
340  //TODO: this code should set every possible pointer that could be set by codec and is not an option;
341  ctx->extradata_size = 8;
342  ctx->extradata = av_malloc(ctx->extradata_size);
343  return 0;
344 }
345 
346 static int dummy_close(AVCodecContext *ctx)
347 {
348  av_freep(&ctx->extradata);
349  ctx->extradata_size = 0;
350  return 0;
351 }
352 
353 static int dummy_encode(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
354 {
355  return AVERROR(ENOSYS);
356 }
357 
358 typedef struct Dummy12Context {
359  AVClass *av_class;
360  int num;
361  char* str;
363 
364 typedef struct Dummy3Context {
365  void *fake_av_class;
366  int num;
367  char* str;
368 } Dummy3Context;
369 
370 #define OFFSET(x) offsetof(Dummy12Context, x)
371 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
372 static const AVOption dummy_options[] = {
373  { "str", "set str", OFFSET(str), AV_OPT_TYPE_STRING, { .str = "i'm src default value" }, 0, 0, VE},
374  { "num", "set num", OFFSET(num), AV_OPT_TYPE_INT, { .i64 = 1500100900 }, 0, INT_MAX, VE},
375  { NULL },
376 };
377 
378 static const AVClass dummy_v1_class = {
379  .class_name = "dummy_v1_class",
380  .item_name = av_default_item_name,
381  .option = dummy_options,
382  .version = LIBAVUTIL_VERSION_INT,
383 };
384 
385 static const AVClass dummy_v2_class = {
386  .class_name = "dummy_v2_class",
387  .item_name = av_default_item_name,
388  .option = dummy_options,
389  .version = LIBAVUTIL_VERSION_INT,
390 };
391 
392 /* codec with options */
393 static AVCodec dummy_v1_encoder = {
394  .name = "dummy_v1_codec",
395  .type = AVMEDIA_TYPE_VIDEO,
396  .id = AV_CODEC_ID_NONE - 1,
397  .encode2 = dummy_encode,
398  .init = dummy_init,
399  .close = dummy_close,
400  .priv_class = &dummy_v1_class,
401  .priv_data_size = sizeof(Dummy12Context),
402 };
403 
404 /* codec with options, different class */
405 static AVCodec dummy_v2_encoder = {
406  .name = "dummy_v2_codec",
407  .type = AVMEDIA_TYPE_VIDEO,
408  .id = AV_CODEC_ID_NONE - 2,
409  .encode2 = dummy_encode,
410  .init = dummy_init,
411  .close = dummy_close,
412  .priv_class = &dummy_v2_class,
413  .priv_data_size = sizeof(Dummy12Context),
414 };
415 
416 /* codec with priv data, but no class */
417 static AVCodec dummy_v3_encoder = {
418  .name = "dummy_v3_codec",
419  .type = AVMEDIA_TYPE_VIDEO,
420  .id = AV_CODEC_ID_NONE - 3,
421  .encode2 = dummy_encode,
422  .init = dummy_init,
423  .close = dummy_close,
424  .priv_data_size = sizeof(Dummy3Context),
425 };
426 
427 /* codec without priv data */
428 static AVCodec dummy_v4_encoder = {
429  .name = "dummy_v4_codec",
430  .type = AVMEDIA_TYPE_VIDEO,
431  .id = AV_CODEC_ID_NONE - 4,
432  .encode2 = dummy_encode,
433  .init = dummy_init,
434  .close = dummy_close,
435 };
436 
437 static void test_copy_print_codec(const AVCodecContext *ctx)
438 {
439  printf("%-14s: %dx%d prv: %s",
440  ctx->codec ? ctx->codec->name : "NULL",
441  ctx->width, ctx->height,
442  ctx->priv_data ? "set" : "null");
443  if (ctx->codec && ctx->codec->priv_class && ctx->codec->priv_data_size) {
444  int64_t i64;
445  char *str = NULL;
446  av_opt_get_int(ctx->priv_data, "num", 0, &i64);
447  av_opt_get(ctx->priv_data, "str", 0, (uint8_t**)&str);
448  printf(" opts: %"PRId64" %s", i64, str);
449  av_free(str);
450  }
451  printf("\n");
452 }
453 
454 static void test_copy(const AVCodec *c1, const AVCodec *c2)
455 {
456  AVCodecContext *ctx1, *ctx2;
457  printf("%s -> %s\nclosed:\n", c1 ? c1->name : "NULL", c2 ? c2->name : "NULL");
458  ctx1 = avcodec_alloc_context3(c1);
459  ctx2 = avcodec_alloc_context3(c2);
460  ctx1->width = ctx1->height = 128;
461  if (ctx2->codec && ctx2->codec->priv_class && ctx2->codec->priv_data_size) {
462  av_opt_set(ctx2->priv_data, "num", "667", 0);
463  av_opt_set(ctx2->priv_data, "str", "i'm dest value before copy", 0);
464  }
465  avcodec_copy_context(ctx2, ctx1);
466  test_copy_print_codec(ctx1);
467  test_copy_print_codec(ctx2);
468  if (ctx1->codec) {
469  printf("opened:\n");
470  avcodec_open2(ctx1, ctx1->codec, NULL);
471  if (ctx2->codec && ctx2->codec->priv_class && ctx2->codec->priv_data_size) {
472  av_opt_set(ctx2->priv_data, "num", "667", 0);
473  av_opt_set(ctx2->priv_data, "str", "i'm dest value before copy", 0);
474  }
475  avcodec_copy_context(ctx2, ctx1);
476  test_copy_print_codec(ctx1);
477  test_copy_print_codec(ctx2);
478  avcodec_close(ctx1);
479  }
480  avcodec_free_context(&ctx1);
481  avcodec_free_context(&ctx2);
482 }
483 
484 int main(void)
485 {
486  AVCodec *dummy_codec[] = {
491  NULL,
492  };
493  int i, j;
494 
495  for (i = 0; dummy_codec[i]; i++)
496  avcodec_register(dummy_codec[i]);
497 
498  printf("testing avcodec_copy_context()\n");
499  for (i = 0; i < FF_ARRAY_ELEMS(dummy_codec); i++)
500  for (j = 0; j < FF_ARRAY_ELEMS(dummy_codec); j++)
501  test_copy(dummy_codec[i], dummy_codec[j]);
502  return 0;
503 }
504 #endif
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1741
AVRational framerate
Definition: avcodec.h:3429
const char * s
Definition: avisynth_c.h:768
int main(void)
Definition: options.c:176
static AVCodec dummy_v3_encoder
Definition: options.c:103
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:193
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:283
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
Memory handling functions.
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1291
#define AV_OPT_FLAG_AUDIO_PARAM
Definition: opt.h:281
char * str
Definition: options.c:53
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:2143
static const AVOption avcodec_options[]
Definition: options_table.h:44
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1960
enum AVMediaType type
Definition: avcodec.h:3694
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
int(* decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt)
Definition: avcodec.h:3764
static void test_copy(const AVCodec *c1, const AVCodec *c2)
Definition: options.c:140
static AVPacket pkt
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3681
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1869
const AVClass * avcodec_get_class(void)
Get the AVClass for AVCodecContext.
Definition: options.c:280
static const AVClass av_codec_context_class
Definition: options.c:80
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:3052
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:92
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
Definition: decode.c:1063
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2502
uint8_t
#define av_malloc(s)
static const AVOption subtitle_rect_options[]
Definition: options.c:314
AVOptions.
int subtitle_header_size
Definition: avcodec.h:3366
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:1847
const AVClass * av_class
information on struct for av_log
Definition: avcodec.h:1737
static AVFrame * frame
static const AVClass av_subtitle_rect_class
Definition: options.c:325
#define height
static int flags
Definition: log.c:57
static const uint64_t c1
Definition: murmur3.c:49
const AVClass * avcodec_get_frame_class(void)
Get the AVClass for AVFrame.
Definition: options.c:307
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:1163
AVRational pkt_timebase
Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
Definition: avcodec.h:3443
enum AVCodecID id
Definition: avcodec.h:3695
const AVCodecDefault * defaults
Private codec-specific defaults.
Definition: avcodec.h:3742
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
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: utils.c:149
char * str
Definition: options.c:47
int avcodec_is_open(AVCodecContext *s)
Definition: utils.c:2137
static void * codec_child_next(void *obj, void *prev)
Definition: options.c:49
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3688
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:90
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:2716
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:191
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:157
#define width
#define OFFSET(x)
Definition: options.c:56
int width
picture width / height.
Definition: avcodec.h:1919
AVBufferRef * hw_frames_ctx
A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames...
Definition: avcodec.h:3585
static const AVOption dummy_options[]
Definition: options.c:58
int priv_data_size
Definition: avcodec.h:3717
AVFormatContext * ctx
Definition: movenc.c:48
static const AVClass * codec_child_class_next(const AVClass *prev)
Definition: options.c:57
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:332
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:1296
int64_t reordered_opaque
opaque 64-bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque
Definition: avcodec.h:3045
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:2717
#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:875
sample_rate
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
Definition: decode.c:1385
#define SROFFSET(x)
Definition: options.c:312
Libavcodec external API header.
enum AVMediaType codec_type
Definition: avcodec.h:1740
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:172
enum AVCodecID codec_id
Definition: avcodec.h:1749
#define AV_OPT_FLAG_VIDEO_PARAM
Definition: opt.h:282
main external API structure.
Definition: avcodec.h:1732
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1848
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:2305
static const char * format
Definition: movenc.c:47
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:2010
#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:2649
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: utils.c:627
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:2312
const AVClass * priv_class
AVClass for the private context.
Definition: avcodec.h:3707
const uint8_t * key
Definition: internal.h:206
const uint8_t * value
Definition: internal.h:207
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1544
static const AVOption frame_options[]
Definition: options.c:287
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:83
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:1702
static AVClassCategory get_category(void *ptr)
Definition: options.c:73
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:3152
static const uint64_t c2
Definition: murmur3.c:50
static const AVClass av_frame_class
Definition: options.c:300
int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec)
Definition: options.c:151
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:772
void * priv_data
Definition: avcodec.h:1774
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:751
#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:3201
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
#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:3221
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1782
FF_DISABLE_DEPRECATION_WARNINGS static FF_ENABLE_DEPRECATION_WARNINGS const char * context_to_name(void *ptr)
Definition: options.c:40
void avcodec_register(AVCodec *codec)
Register the codec codec and initialize libavcodec.
Definition: utils.c:179
int * slice_offset
slice offsets in the frame in bytes
Definition: avcodec.h:2134
#define av_freep(p)
This structure stores compressed data.
Definition: avcodec.h:1634
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:3436
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define FOFFSET(x)
Definition: options.c:285
int avcodec_default_execute(AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
Definition: utils.c:535
uint8_t * subtitle_header
Header containing style information for text subtitles.
Definition: avcodec.h:3365
static int dummy_encode(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: options.c:39