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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};
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  const AVCodec *orig_codec = dest->codec;
193  uint8_t *orig_priv_data = dest->priv_data;
194 
195  if (avcodec_is_open(dest)) { // check that the dest context is uninitialized
196  av_log(dest, AV_LOG_ERROR,
197  "Tried to copy AVCodecContext %p into already-initialized %p\n",
198  src, dest);
199  return AVERROR(EINVAL);
200  }
201 
202  av_opt_free(dest);
203  av_freep(&dest->rc_override);
204  av_freep(&dest->intra_matrix);
205  av_freep(&dest->inter_matrix);
206  av_freep(&dest->extradata);
207  av_freep(&dest->subtitle_header);
208 
209  memcpy(dest, src, sizeof(*dest));
210  av_opt_copy(dest, src);
211 
212  dest->priv_data = orig_priv_data;
213  dest->codec = orig_codec;
214 
215  if (orig_priv_data && src->codec && src->codec->priv_class &&
216  dest->codec && dest->codec->priv_class)
217  av_opt_copy(orig_priv_data, src->priv_data);
218 
219 
220  /* set values specific to opened codecs back to their default state */
221  dest->slice_offset = NULL;
222  dest->hwaccel = NULL;
223  dest->internal = NULL;
224 #if FF_API_CODED_FRAME
226  dest->coded_frame = NULL;
228 #endif
229 
230  /* reallocate values that should be allocated separately */
231  dest->extradata = NULL;
232  dest->intra_matrix = NULL;
233  dest->inter_matrix = NULL;
234  dest->rc_override = NULL;
235  dest->subtitle_header = NULL;
236  dest->hw_frames_ctx = NULL;
237 
238 #define alloc_and_copy_or_fail(obj, size, pad) \
239  if (src->obj && size > 0) { \
240  dest->obj = av_malloc(size + pad); \
241  if (!dest->obj) \
242  goto fail; \
243  memcpy(dest->obj, src->obj, size); \
244  if (pad) \
245  memset(((uint8_t *) dest->obj) + size, 0, pad); \
246  }
247  alloc_and_copy_or_fail(extradata, src->extradata_size,
249  dest->extradata_size = src->extradata_size;
250  alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0);
251  alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0);
252  alloc_and_copy_or_fail(rc_override, src->rc_override_count * sizeof(*src->rc_override), 0);
253  alloc_and_copy_or_fail(subtitle_header, src->subtitle_header_size, 1);
255 #undef alloc_and_copy_or_fail
256 
257  if (src->hw_frames_ctx) {
259  if (!dest->hw_frames_ctx)
260  goto fail;
261  }
262 
263  return 0;
264 
265 fail:
266  av_freep(&dest->subtitle_header);
267  av_freep(&dest->rc_override);
268  av_freep(&dest->intra_matrix);
269  av_freep(&dest->inter_matrix);
270  av_freep(&dest->extradata);
272  dest->subtitle_header_size = 0;
273  dest->extradata_size = 0;
274  av_opt_free(dest);
275  return AVERROR(ENOMEM);
276 }
277 #endif
278 
280 {
281  return &av_codec_context_class;
282 }
283 
284 #define FOFFSET(x) offsetof(AVFrame,x)
285 
286 static const AVOption frame_options[]={
287 {"best_effort_timestamp", "", FOFFSET(best_effort_timestamp), AV_OPT_TYPE_INT64, {.i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0},
288 {"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
289 {"pkt_size", "", FOFFSET(pkt_size), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
290 {"sample_aspect_ratio", "", FOFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0},
291 {"width", "", FOFFSET(width), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
292 {"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
293 {"format", "", FOFFSET(format), AV_OPT_TYPE_INT, {.i64 = -1 }, 0, INT_MAX, 0},
294 {"channel_layout", "", FOFFSET(channel_layout), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, 0},
295 {"sample_rate", "", FOFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
296 {NULL},
297 };
298 
299 static const AVClass av_frame_class = {
300  .class_name = "AVFrame",
301  .item_name = NULL,
302  .option = frame_options,
303  .version = LIBAVUTIL_VERSION_INT,
304 };
305 
307 {
308  return &av_frame_class;
309 }
310 
311 #define SROFFSET(x) offsetof(AVSubtitleRect,x)
312 
314 {"x", "", SROFFSET(x), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
315 {"y", "", SROFFSET(y), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
316 {"w", "", SROFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
317 {"h", "", SROFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
318 {"type", "", SROFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
319 {"flags", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0, "flags"},
320 {"forced", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0},
321 {NULL},
322 };
323 
325  .class_name = "AVSubtitleRect",
326  .item_name = NULL,
327  .option = subtitle_rect_options,
328  .version = LIBAVUTIL_VERSION_INT,
329 };
330 
332 {
333  return &av_subtitle_rect_class;
334 }
335 
336 #ifdef TEST
337 static int dummy_init(AVCodecContext *ctx)
338 {
339  //TODO: this code should set every possible pointer that could be set by codec and is not an option;
340  ctx->extradata_size = 8;
341  ctx->extradata = av_malloc(ctx->extradata_size);
342  return 0;
343 }
344 
345 static int dummy_close(AVCodecContext *ctx)
346 {
347  av_freep(&ctx->extradata);
348  ctx->extradata_size = 0;
349  return 0;
350 }
351 
352 static int dummy_encode(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
353 {
354  return AVERROR(ENOSYS);
355 }
356 
357 typedef struct Dummy12Context {
358  AVClass *av_class;
359  int num;
360  char* str;
362 
363 typedef struct Dummy3Context {
364  void *fake_av_class;
365  int num;
366  char* str;
367 } Dummy3Context;
368 
369 #define OFFSET(x) offsetof(Dummy12Context, x)
370 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
371 static const AVOption dummy_options[] = {
372  { "str", "set str", OFFSET(str), AV_OPT_TYPE_STRING, { .str = "i'm src default value" }, 0, 0, VE},
373  { "num", "set num", OFFSET(num), AV_OPT_TYPE_INT, { .i64 = 1500100900 }, 0, INT_MAX, VE},
374  { NULL },
375 };
376 
377 static const AVClass dummy_v1_class = {
378  .class_name = "dummy_v1_class",
379  .item_name = av_default_item_name,
380  .option = dummy_options,
381  .version = LIBAVUTIL_VERSION_INT,
382 };
383 
384 static const AVClass dummy_v2_class = {
385  .class_name = "dummy_v2_class",
386  .item_name = av_default_item_name,
387  .option = dummy_options,
388  .version = LIBAVUTIL_VERSION_INT,
389 };
390 
391 /* codec with options */
392 static AVCodec dummy_v1_encoder = {
393  .name = "dummy_v1_codec",
394  .type = AVMEDIA_TYPE_VIDEO,
395  .id = AV_CODEC_ID_NONE - 1,
396  .encode2 = dummy_encode,
397  .init = dummy_init,
398  .close = dummy_close,
399  .priv_class = &dummy_v1_class,
400  .priv_data_size = sizeof(Dummy12Context),
401 };
402 
403 /* codec with options, different class */
404 static AVCodec dummy_v2_encoder = {
405  .name = "dummy_v2_codec",
406  .type = AVMEDIA_TYPE_VIDEO,
407  .id = AV_CODEC_ID_NONE - 2,
408  .encode2 = dummy_encode,
409  .init = dummy_init,
410  .close = dummy_close,
411  .priv_class = &dummy_v2_class,
412  .priv_data_size = sizeof(Dummy12Context),
413 };
414 
415 /* codec with priv data, but no class */
416 static AVCodec dummy_v3_encoder = {
417  .name = "dummy_v3_codec",
418  .type = AVMEDIA_TYPE_VIDEO,
419  .id = AV_CODEC_ID_NONE - 3,
420  .encode2 = dummy_encode,
421  .init = dummy_init,
422  .close = dummy_close,
423  .priv_data_size = sizeof(Dummy3Context),
424 };
425 
426 /* codec without priv data */
427 static AVCodec dummy_v4_encoder = {
428  .name = "dummy_v4_codec",
429  .type = AVMEDIA_TYPE_VIDEO,
430  .id = AV_CODEC_ID_NONE - 4,
431  .encode2 = dummy_encode,
432  .init = dummy_init,
433  .close = dummy_close,
434 };
435 
436 static void test_copy_print_codec(const AVCodecContext *ctx)
437 {
438  printf("%-14s: %dx%d prv: %s",
439  ctx->codec ? ctx->codec->name : "NULL",
440  ctx->width, ctx->height,
441  ctx->priv_data ? "set" : "null");
442  if (ctx->codec && ctx->codec->priv_class && ctx->codec->priv_data_size) {
443  int64_t i64;
444  char *str = NULL;
445  av_opt_get_int(ctx->priv_data, "num", 0, &i64);
446  av_opt_get(ctx->priv_data, "str", 0, (uint8_t**)&str);
447  printf(" opts: %"PRId64" %s", i64, str);
448  av_free(str);
449  }
450  printf("\n");
451 }
452 
453 static void test_copy(const AVCodec *c1, const AVCodec *c2)
454 {
455  AVCodecContext *ctx1, *ctx2;
456  printf("%s -> %s\nclosed:\n", c1 ? c1->name : "NULL", c2 ? c2->name : "NULL");
457  ctx1 = avcodec_alloc_context3(c1);
458  ctx2 = avcodec_alloc_context3(c2);
459  ctx1->width = ctx1->height = 128;
460  if (ctx2->codec && ctx2->codec->priv_class && ctx2->codec->priv_data_size) {
461  av_opt_set(ctx2->priv_data, "num", "667", 0);
462  av_opt_set(ctx2->priv_data, "str", "i'm dest value before copy", 0);
463  }
464  avcodec_copy_context(ctx2, ctx1);
465  test_copy_print_codec(ctx1);
466  test_copy_print_codec(ctx2);
467  if (ctx1->codec) {
468  printf("opened:\n");
469  avcodec_open2(ctx1, ctx1->codec, NULL);
470  if (ctx2->codec && ctx2->codec->priv_class && ctx2->codec->priv_data_size) {
471  av_opt_set(ctx2->priv_data, "num", "667", 0);
472  av_opt_set(ctx2->priv_data, "str", "i'm dest value before copy", 0);
473  }
474  avcodec_copy_context(ctx2, ctx1);
475  test_copy_print_codec(ctx1);
476  test_copy_print_codec(ctx2);
477  avcodec_close(ctx1);
478  }
479  avcodec_free_context(&ctx1);
480  avcodec_free_context(&ctx2);
481 }
482 
483 int main(void)
484 {
485  AVCodec *dummy_codec[] = {
490  NULL,
491  };
492  int i, j;
493 
494  for (i = 0; dummy_codec[i]; i++)
495  avcodec_register(dummy_codec[i]);
496 
497  printf("testing avcodec_copy_context()\n");
498  for (i = 0; i < FF_ARRAY_ELEMS(dummy_codec); i++)
499  for (j = 0; j < FF_ARRAY_ELEMS(dummy_codec); j++)
500  test_copy(dummy_codec[i], dummy_codec[j]);
501  return 0;
502 }
503 #endif
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1685
AVRational framerate
Definition: avcodec.h:3376
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:124
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
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:1293
#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:2087
static const AVOption avcodec_options[]
Definition: options_table.h:44
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1904
enum AVMediaType type
Definition: avcodec.h:3614
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
int(* decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt)
Definition: avcodec.h:3684
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:3601
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1813
const AVClass * avcodec_get_class(void)
Get the AVClass for AVCodecContext.
Definition: options.c:279
static const AVClass av_codec_context_class
Definition: options.c:80
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2997
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: utils.c:1047
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2446
uint8_t
#define av_malloc(s)
static const AVOption subtitle_rect_options[]
Definition: options.c:313
AVOptions.
int subtitle_header_size
Definition: avcodec.h:3313
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:1791
const AVClass * av_class
information on struct for av_log
Definition: avcodec.h:1681
static AVFrame * frame
static const AVClass av_subtitle_rect_class
Definition: options.c:324
#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:306
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:3023
AVRational pkt_timebase
Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
Definition: avcodec.h:3392
enum AVCodecID id
Definition: avcodec.h:3615
const AVCodecDefault * defaults
Private codec-specific defaults.
Definition: avcodec.h:3662
#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:148
char * str
Definition: options.c:47
int avcodec_is_open(AVCodecContext *s)
Definition: utils.c:4006
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:3608
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:84
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:2660
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:190
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:1863
AVBufferRef * hw_frames_ctx
A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames...
Definition: avcodec.h:3543
static const AVOption dummy_options[]
Definition: options.c:58
int priv_data_size
Definition: avcodec.h:3637
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:331
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:1298
int64_t reordered_opaque
opaque 64-bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque
Definition: avcodec.h:2990
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:194
static AVCodec dummy_v2_encoder
Definition: options.c:91
RcOverride * rc_override
Definition: avcodec.h:2661
#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:877
sample_rate
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
Definition: utils.c:723
#define SROFFSET(x)
Definition: options.c:311
Libavcodec external API header.
enum AVMediaType codec_type
Definition: avcodec.h:1684
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:1693
#define AV_OPT_FLAG_VIDEO_PARAM
Definition: opt.h:282
main external API structure.
Definition: avcodec.h:1676
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1792
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:2249
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:1954
#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:2593
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: utils.c:1241
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:2256
const AVClass * priv_class
AVClass for the private context.
Definition: avcodec.h:3627
const uint8_t * key
Definition: internal.h:180
const uint8_t * value
Definition: internal.h:181
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1546
static const AVOption frame_options[]
Definition: options.c:286
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
common internal api header.
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:92
int av_opt_copy(void *dst, const void *src)
Copy options from src object into dest object.
Definition: opt.c:1704
static AVClassCategory get_category(void *ptr)
Definition: options.c:73
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:3099
static const uint64_t c2
Definition: murmur3.c:50
static const AVClass av_frame_class
Definition: options.c:299
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:734
void * priv_data
Definition: avcodec.h:1718
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:753
#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:3148
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
#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:3168
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1726
static AVCodec * c
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:178
int * slice_offset
slice offsets in the frame in bytes
Definition: avcodec.h:2078
#define av_freep(p)
This structure stores compressed data.
Definition: avcodec.h:1578
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:451
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:242
#define FOFFSET(x)
Definition: options.c:284
int avcodec_default_execute(AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
Definition: utils.c:1004
uint8_t * subtitle_header
Header containing style information for text subtitles.
Definition: avcodec.h:3312
static int dummy_encode(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: options.c:39