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bsf.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include <string.h>
20 
21 #include "libavutil/log.h"
22 #include "libavutil/mem.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/avassert.h"
25 #include "libavutil/avstring.h"
26 #include "libavutil/bprint.h"
27 
28 #include "avcodec.h"
29 #include "bsf.h"
30 
31 struct AVBSFInternal {
33  int eof;
34 };
35 
37 {
39 
40  if (!pctx || !*pctx)
41  return;
42  ctx = *pctx;
43 
44  if (ctx->filter->close)
45  ctx->filter->close(ctx);
46  if (ctx->filter->priv_class && ctx->priv_data)
47  av_opt_free(ctx->priv_data);
48 
49  av_opt_free(ctx);
50 
52  av_freep(&ctx->internal);
53  av_freep(&ctx->priv_data);
54 
57 
58  av_freep(pctx);
59 }
60 
61 static void *bsf_child_next(void *obj, void *prev)
62 {
63  AVBSFContext *ctx = obj;
64  if (!prev && ctx->filter->priv_class)
65  return ctx->priv_data;
66  return NULL;
67 }
68 
69 static const AVClass bsf_class = {
70  .class_name = "AVBSFContext",
71  .item_name = av_default_item_name,
72  .version = LIBAVUTIL_VERSION_INT,
73  .child_next = bsf_child_next,
74  .child_class_next = ff_bsf_child_class_next,
75 };
76 
78 {
79  return &bsf_class;
80 }
81 
83 {
85  int ret;
86 
87  ctx = av_mallocz(sizeof(*ctx));
88  if (!ctx)
89  return AVERROR(ENOMEM);
90 
91  ctx->av_class = &bsf_class;
92  ctx->filter = filter;
93 
96  if (!ctx->par_in || !ctx->par_out) {
97  ret = AVERROR(ENOMEM);
98  goto fail;
99  }
100 
101  ctx->internal = av_mallocz(sizeof(*ctx->internal));
102  if (!ctx->internal) {
103  ret = AVERROR(ENOMEM);
104  goto fail;
105  }
106 
108  if (!ctx->internal->buffer_pkt) {
109  ret = AVERROR(ENOMEM);
110  goto fail;
111  }
112 
113  av_opt_set_defaults(ctx);
114 
115  /* allocate priv data and init private options */
116  if (filter->priv_data_size) {
117  ctx->priv_data = av_mallocz(filter->priv_data_size);
118  if (!ctx->priv_data) {
119  ret = AVERROR(ENOMEM);
120  goto fail;
121  }
122  if (filter->priv_class) {
123  *(const AVClass **)ctx->priv_data = filter->priv_class;
125  }
126  }
127 
128  *pctx = ctx;
129  return 0;
130 fail:
131  av_bsf_free(&ctx);
132  return ret;
133 }
134 
136 {
137  int ret, i;
138 
139  /* check that the codec is supported */
140  if (ctx->filter->codec_ids) {
141  for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++)
142  if (ctx->par_in->codec_id == ctx->filter->codec_ids[i])
143  break;
144  if (ctx->filter->codec_ids[i] == AV_CODEC_ID_NONE) {
146  av_log(ctx, AV_LOG_ERROR, "Codec '%s' (%d) is not supported by the "
147  "bitstream filter '%s'. Supported codecs are: ",
148  desc ? desc->name : "unknown", ctx->par_in->codec_id, ctx->filter->name);
149  for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++) {
150  desc = avcodec_descriptor_get(ctx->filter->codec_ids[i]);
151  av_log(ctx, AV_LOG_ERROR, "%s (%d) ",
152  desc ? desc->name : "unknown", ctx->filter->codec_ids[i]);
153  }
154  av_log(ctx, AV_LOG_ERROR, "\n");
155  return AVERROR(EINVAL);
156  }
157  }
158 
159  /* initialize output parameters to be the same as input
160  * init below might overwrite that */
161  ret = avcodec_parameters_copy(ctx->par_out, ctx->par_in);
162  if (ret < 0)
163  return ret;
164 
165  ctx->time_base_out = ctx->time_base_in;
166 
167  if (ctx->filter->init) {
168  ret = ctx->filter->init(ctx);
169  if (ret < 0)
170  return ret;
171  }
172 
173  return 0;
174 }
175 
177 {
178  if (!pkt) {
179  ctx->internal->eof = 1;
180  return 0;
181  }
182 
183  av_assert0(pkt->data || pkt->side_data);
184 
185  if (ctx->internal->eof) {
186  av_log(ctx, AV_LOG_ERROR, "A non-NULL packet sent after an EOF.\n");
187  return AVERROR(EINVAL);
188  }
189 
190  if (ctx->internal->buffer_pkt->data ||
192  return AVERROR(EAGAIN);
193 
195 
196  return 0;
197 }
198 
200 {
201  return ctx->filter->filter(ctx, pkt);
202 }
203 
205 {
206  AVBSFInternal *in = ctx->internal;
207  AVPacket *tmp_pkt;
208 
209  if (in->eof)
210  return AVERROR_EOF;
211 
212  if (!ctx->internal->buffer_pkt->data &&
214  return AVERROR(EAGAIN);
215 
216  tmp_pkt = av_packet_alloc();
217  if (!tmp_pkt)
218  return AVERROR(ENOMEM);
219 
220  *pkt = ctx->internal->buffer_pkt;
221  ctx->internal->buffer_pkt = tmp_pkt;
222 
223  return 0;
224 }
225 
227 {
228  AVBSFInternal *in = ctx->internal;
229 
230  if (in->eof)
231  return AVERROR_EOF;
232 
233  if (!ctx->internal->buffer_pkt->data &&
235  return AVERROR(EAGAIN);
236 
238 
239  return 0;
240 }
241 
242 typedef struct BSFListContext {
243  const AVClass *class;
244 
246  int nb_bsfs;
247 
248  unsigned idx; // index of currently processed BSF
249  unsigned flushed_idx; // index of BSF being flushed
250 
251  char * item_name;
253 
254 
255 static int bsf_list_init(AVBSFContext *bsf)
256 {
257  BSFListContext *lst = bsf->priv_data;
258  int ret, i;
259  const AVCodecParameters *cod_par = bsf->par_in;
260  AVRational tb = bsf->time_base_in;
261 
262  for (i = 0; i < lst->nb_bsfs; ++i) {
263  ret = avcodec_parameters_copy(lst->bsfs[i]->par_in, cod_par);
264  if (ret < 0)
265  goto fail;
266 
267  lst->bsfs[i]->time_base_in = tb;
268 
269  ret = av_bsf_init(lst->bsfs[i]);
270  if (ret < 0)
271  goto fail;
272 
273  cod_par = lst->bsfs[i]->par_out;
274  tb = lst->bsfs[i]->time_base_out;
275  }
276 
277  bsf->time_base_out = tb;
278  ret = avcodec_parameters_copy(bsf->par_out, cod_par);
279 
280 fail:
281  return ret;
282 }
283 
285 {
286  BSFListContext *lst = bsf->priv_data;
287  int ret;
288 
289  if (!lst->nb_bsfs)
290  return ff_bsf_get_packet_ref(bsf, out);
291 
292  while (1) {
293  if (lst->idx > lst->flushed_idx) {
294  ret = av_bsf_receive_packet(lst->bsfs[lst->idx-1], out);
295  if (ret == AVERROR(EAGAIN)) {
296  /* no more packets from idx-1, try with previous */
297  ret = 0;
298  lst->idx--;
299  continue;
300  } else if (ret == AVERROR_EOF) {
301  /* filter idx-1 is done, continue with idx...nb_bsfs */
302  lst->flushed_idx = lst->idx;
303  continue;
304  }else if (ret < 0) {
305  /* filtering error */
306  break;
307  }
308  } else {
309  ret = ff_bsf_get_packet_ref(bsf, out);
310  if (ret == AVERROR_EOF) {
311  lst->idx = lst->flushed_idx;
312  } else if (ret < 0)
313  break;
314  }
315 
316  if (lst->idx < lst->nb_bsfs) {
317  AVPacket *pkt;
318  if (ret == AVERROR_EOF && lst->idx == lst->flushed_idx) {
319  /* ff_bsf_get_packet_ref returned EOF and idx is first
320  * filter of yet not flushed filter chain */
321  pkt = NULL;
322  } else {
323  pkt = out;
324  }
325  ret = av_bsf_send_packet(lst->bsfs[lst->idx], pkt);
326  if (ret < 0)
327  break;
328  lst->idx++;
329  } else {
330  /* The end of filter chain, break to return result */
331  break;
332  }
333  }
334 
335  if (ret < 0)
336  av_packet_unref(out);
337 
338  return ret;
339 }
340 
341 static void bsf_list_close(AVBSFContext *bsf)
342 {
343  BSFListContext *lst = bsf->priv_data;
344  int i;
345 
346  for (i = 0; i < lst->nb_bsfs; ++i)
347  av_bsf_free(&lst->bsfs[i]);
348  av_freep(&lst->bsfs);
349  av_freep(&lst->item_name);
350 }
351 
352 static const char *bsf_list_item_name(void *ctx)
353 {
354  static const char *null_filter_name = "null";
355  AVBSFContext *bsf_ctx = ctx;
356  BSFListContext *lst = bsf_ctx->priv_data;
357 
358  if (!lst->nb_bsfs)
359  return null_filter_name;
360 
361  if (!lst->item_name) {
362  int i;
363  AVBPrint bp;
364  av_bprint_init(&bp, 16, 128);
365 
366  av_bprintf(&bp, "bsf_list(");
367  for (i = 0; i < lst->nb_bsfs; i++)
368  av_bprintf(&bp, i ? ",%s" : "%s", lst->bsfs[i]->filter->name);
369  av_bprintf(&bp, ")");
370 
371  av_bprint_finalize(&bp, &lst->item_name);
372  }
373 
374  return lst->item_name;
375 }
376 
377 static const AVClass bsf_list_class = {
378  .class_name = "bsf_list",
379  .item_name = bsf_list_item_name,
380  .version = LIBAVUTIL_VERSION_INT,
381 };
382 
384  .name = "bsf_list",
385  .priv_data_size = sizeof(BSFListContext),
386  .priv_class = &bsf_list_class,
387  .init = bsf_list_init,
389  .close = bsf_list_close,
390 };
391 
392 struct AVBSFList {
394  int nb_bsfs;
395 };
396 
398 {
399  return av_mallocz(sizeof(AVBSFList));
400 }
401 
403 {
404  int i;
405 
406  if (!*lst)
407  return;
408 
409  for (i = 0; i < (*lst)->nb_bsfs; ++i)
410  av_bsf_free(&(*lst)->bsfs[i]);
411  av_free((*lst)->bsfs);
412  av_freep(lst);
413 }
414 
416 {
417  return av_dynarray_add_nofree(&lst->bsfs, &lst->nb_bsfs, bsf);
418 }
419 
420 int av_bsf_list_append2(AVBSFList *lst, const char *bsf_name, AVDictionary ** options)
421 {
422  int ret;
423  const AVBitStreamFilter *filter;
424  AVBSFContext *bsf;
425 
426  filter = av_bsf_get_by_name(bsf_name);
427  if (!filter)
428  return AVERROR_BSF_NOT_FOUND;
429 
430  ret = av_bsf_alloc(filter, &bsf);
431  if (ret < 0)
432  return ret;
433 
434  if (options) {
435  ret = av_opt_set_dict2(bsf, options, AV_OPT_SEARCH_CHILDREN);
436  if (ret < 0)
437  goto end;
438  }
439 
440  ret = av_bsf_list_append(lst, bsf);
441 
442 end:
443  if (ret < 0)
444  av_bsf_free(&bsf);
445 
446  return ret;
447 }
448 
450 {
451  int ret = 0;
453 
454  if ((*lst)->nb_bsfs == 1) {
455  *bsf = (*lst)->bsfs[0];
456  av_freep(&(*lst)->bsfs);
457  (*lst)->nb_bsfs = 0;
458  goto end;
459  }
460 
461  ret = av_bsf_alloc(&ff_list_bsf, bsf);
462  if (ret < 0)
463  return ret;
464 
465  ctx = (*bsf)->priv_data;
466 
467  ctx->bsfs = (*lst)->bsfs;
468  ctx->nb_bsfs = (*lst)->nb_bsfs;
469 
470 end:
471  av_freep(lst);
472  return ret;
473 }
474 
475 static int bsf_parse_single(const char *str, AVBSFList *bsf_lst)
476 {
477  char *bsf_name, *bsf_options_str, *buf;
478  AVDictionary *bsf_options = NULL;
479  int ret = 0;
480 
481  if (!(buf = av_strdup(str)))
482  return AVERROR(ENOMEM);
483 
484  bsf_name = av_strtok(buf, "=", &bsf_options_str);
485  if (!bsf_name) {
486  ret = AVERROR(EINVAL);
487  goto end;
488  }
489 
490  if (bsf_options_str) {
491  ret = av_dict_parse_string(&bsf_options, bsf_options_str, "=", ":", 0);
492  if (ret < 0)
493  goto end;
494  }
495 
496  ret = av_bsf_list_append2(bsf_lst, bsf_name, &bsf_options);
497 
498  av_dict_free(&bsf_options);
499 end:
500  av_free(buf);
501  return ret;
502 }
503 
504 int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst)
505 {
506  AVBSFList *lst;
507  char *bsf_str, *buf, *dup, *saveptr;
508  int ret;
509 
510  if (!str)
511  return av_bsf_get_null_filter(bsf_lst);
512 
513  lst = av_bsf_list_alloc();
514  if (!lst)
515  return AVERROR(ENOMEM);
516 
517  if (!(dup = buf = av_strdup(str))) {
518  ret = AVERROR(ENOMEM);
519  goto end;
520  }
521 
522  while (1) {
523  bsf_str = av_strtok(buf, ",", &saveptr);
524  if (!bsf_str)
525  break;
526 
527  ret = bsf_parse_single(bsf_str, lst);
528  if (ret < 0)
529  goto end;
530 
531  buf = NULL;
532  }
533 
534  ret = av_bsf_list_finalize(&lst, bsf_lst);
535 end:
536  if (ret < 0)
537  av_bsf_list_free(&lst);
538  av_free(dup);
539  return ret;
540 }
541 
543 {
544  return av_bsf_alloc(&ff_list_bsf, bsf);
545 }
void av_bsf_free(AVBSFContext **pctx)
Free a bitstream filter context and everything associated with it; write NULL into the supplied point...
Definition: bsf.c:36
#define NULL
Definition: coverity.c:32
AVBSFContext ** bsfs
Definition: bsf.c:245
const AVClass * priv_class
A class for the private data, used to declare bitstream filter private AVOptions. ...
Definition: avcodec.h:5898
AVCodecParameters * par_out
Parameters of the output stream.
Definition: avcodec.h:5864
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
static void * bsf_child_next(void *obj, void *prev)
Definition: bsf.c:61
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
Memory handling functions.
unsigned idx
Definition: bsf.c:248
const char * desc
Definition: nvenc.c:60
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1291
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4066
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5839
The bitstream filter state.
Definition: avcodec.h:5830
const AVBitStreamFilter * av_bsf_get_by_name(const char *name)
Structure for chain/list of bitstream filters.
Definition: bsf.c:392
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
static AVPacket pkt
static const AVClass bsf_class
Definition: bsf.c:69
int av_bsf_get_null_filter(AVBSFContext **bsf)
Get null/pass-through bitstream filter.
Definition: bsf.c:542
void * priv_data
Opaque filter-specific private data.
Definition: avcodec.h:5851
This struct describes the properties of an encoded stream.
Definition: avcodec.h:4058
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
Definition: bsf.c:135
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
void av_bsf_list_free(AVBSFList **lst)
Free list of bitstream filters.
Definition: bsf.c:402
int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **pctx)
Allocate a context for a given bitstream filter.
Definition: bsf.c:82
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 const AVClass bsf_list_class
Definition: bsf.c:377
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:199
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:62
AVOptions.
AVCodecParameters * avcodec_parameters_alloc(void)
Allocate a new AVCodecParameters and set its fields to default values (unknown/invalid/0).
Definition: utils.c:4168
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
static int bsf_parse_single(const char *str, AVBSFList *bsf_lst)
Definition: bsf.c:475
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
Definition: cfhd.c:80
const char * name
Definition: avcodec.h:5880
uint8_t * data
Definition: avcodec.h:1657
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:644
#define AVERROR_EOF
End of file.
Definition: error.h:55
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
Add an element to a dynamic array.
Definition: mem.c:280
const OptionDef options[]
Definition: ffserver.c:3948
#define av_log(a,...)
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4189
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static int bsf_list_filter(AVBSFContext *bsf, AVPacket *out)
Definition: bsf.c:284
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
enum AVCodecID * codec_ids
A list of codec ids supported by the filter, terminated by AV_CODEC_ID_NONE.
Definition: avcodec.h:5887
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
AVRational time_base_in
The timebase used for the timestamps of the input packets.
Definition: avcodec.h:5870
simple assert() macros that are a bit more flexible than ISO C assert().
unsigned flushed_idx
Definition: bsf.c:249
int side_data_elems
Definition: avcodec.h:1669
static void bsf_list_close(AVBSFContext *bsf)
Definition: bsf.c:341
int eof
Definition: bsf.c:33
int(* init)(AVBSFContext *ctx)
Definition: avcodec.h:5909
void avcodec_parameters_free(AVCodecParameters **par)
Free an AVCodecParameters instance and everything associated with it and write NULL to the supplied p...
Definition: utils.c:4178
#define fail()
Definition: checkasm.h:89
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3063
int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf)
Append bitstream filter to the list of bitstream filters.
Definition: bsf.c:415
const AVClass * ff_bsf_child_class_next(const AVClass *prev)
const AVClass * av_bsf_get_class(void)
Get the AVClass for AVBSFContext.
Definition: bsf.c:77
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:557
int av_bsf_list_append2(AVBSFList *lst, const char *bsf_name, AVDictionary **options)
Construct new bitstream filter context given it's name and options and append it to the list of bitst...
Definition: bsf.c:420
AVRational time_base_out
The timebase used for the timestamps of the output packets.
Definition: avcodec.h:5876
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:176
char * item_name
Definition: bsf.c:251
AVFormatContext * ctx
Definition: movenc.c:48
const AVClass * av_class
A class for logging and AVOptions.
Definition: avcodec.h:5834
#define AVERROR_BSF_NOT_FOUND
Bitstream filter not found.
Definition: error.h:49
int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
Set all the options from a given dictionary on an object.
Definition: opt.c:1564
int nb_bsfs
Definition: bsf.c:246
int av_dict_parse_string(AVDictionary **pm, const char *str, const char *key_val_sep, const char *pairs_sep, int flags)
Parse the key/value pairs list and add the parsed entries to a dictionary.
Definition: dict.c:180
AVBSFList * av_bsf_list_alloc(void)
Allocate empty list of bitstream filters.
Definition: bsf.c:397
AVBSFContext ** bsfs
Definition: bsf.c:393
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:237
Libavcodec external API header.
void(* close)(AVBSFContext *ctx)
Definition: avcodec.h:5911
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:589
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
void * buf
Definition: avisynth_c.h:690
Describe the class of an AVClass context structure.
Definition: log.h:67
AVPacket * buffer_pkt
Definition: bsf.c:32
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int(* filter)(AVBSFContext *ctx, AVPacket *pkt)
Definition: avcodec.h:5910
const char * name
Name of the codec described by this descriptor.
Definition: avcodec.h:703
int nb_bsfs
Definition: bsf.c:394
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:695
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
const AVBitStreamFilter ff_list_bsf
Definition: bsf.c:383
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1668
int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst)
Parse string describing list of bitstream filters and create single AVBSFContext describing the whole...
Definition: bsf.c:504
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1544
int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt)
Called by the bitstream filters to get the next packet for filtering.
Definition: bsf.c:204
static const char * bsf_list_item_name(void *ctx)
Definition: bsf.c:352
#define av_free(p)
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:51
static int bsf_list_init(AVBSFContext *bsf)
Definition: bsf.c:255
FILE * out
Definition: movenc.c:54
#define av_freep(p)
AVBSFInternal * internal
Opaque libavcodec internal data.
Definition: avcodec.h:5845
This structure stores compressed data.
Definition: avcodec.h:1634
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5858
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
Called by bitstream filters to get packet for filtering.
Definition: bsf.c:226
#define tb
Definition: regdef.h:68
int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf)
Finalize list of bitstream filters.
Definition: bsf.c:449