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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/avstring.h"
25 #include "libavutil/bprint.h"
26 
27 #include "avcodec.h"
28 #include "bsf.h"
29 
30 struct AVBSFInternal {
32  int eof;
33 };
34 
36 {
38 
39  if (!pctx || !*pctx)
40  return;
41  ctx = *pctx;
42 
43  if (ctx->filter->close)
44  ctx->filter->close(ctx);
45  if (ctx->filter->priv_class && ctx->priv_data)
46  av_opt_free(ctx->priv_data);
47 
48  av_opt_free(ctx);
49 
51  av_freep(&ctx->internal);
52  av_freep(&ctx->priv_data);
53 
56 
57  av_freep(pctx);
58 }
59 
60 static void *bsf_child_next(void *obj, void *prev)
61 {
62  AVBSFContext *ctx = obj;
63  if (!prev && ctx->filter->priv_class)
64  return ctx->priv_data;
65  return NULL;
66 }
67 
68 static const AVClass bsf_class = {
69  .class_name = "AVBSFContext",
70  .item_name = av_default_item_name,
71  .version = LIBAVUTIL_VERSION_INT,
72  .child_next = bsf_child_next,
73  .child_class_next = ff_bsf_child_class_next,
74 };
75 
77 {
78  return &bsf_class;
79 }
80 
82 {
84  int ret;
85 
86  ctx = av_mallocz(sizeof(*ctx));
87  if (!ctx)
88  return AVERROR(ENOMEM);
89 
90  ctx->av_class = &bsf_class;
91  ctx->filter = filter;
92 
95  if (!ctx->par_in || !ctx->par_out) {
96  ret = AVERROR(ENOMEM);
97  goto fail;
98  }
99 
100  ctx->internal = av_mallocz(sizeof(*ctx->internal));
101  if (!ctx->internal) {
102  ret = AVERROR(ENOMEM);
103  goto fail;
104  }
105 
107  if (!ctx->internal->buffer_pkt) {
108  ret = AVERROR(ENOMEM);
109  goto fail;
110  }
111 
112  av_opt_set_defaults(ctx);
113 
114  /* allocate priv data and init private options */
115  if (filter->priv_data_size) {
116  ctx->priv_data = av_mallocz(filter->priv_data_size);
117  if (!ctx->priv_data) {
118  ret = AVERROR(ENOMEM);
119  goto fail;
120  }
121  if (filter->priv_class) {
122  *(const AVClass **)ctx->priv_data = filter->priv_class;
124  }
125  }
126 
127  *pctx = ctx;
128  return 0;
129 fail:
130  av_bsf_free(&ctx);
131  return ret;
132 }
133 
135 {
136  int ret, i;
137 
138  /* check that the codec is supported */
139  if (ctx->filter->codec_ids) {
140  for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++)
141  if (ctx->par_in->codec_id == ctx->filter->codec_ids[i])
142  break;
143  if (ctx->filter->codec_ids[i] == AV_CODEC_ID_NONE) {
145  av_log(ctx, AV_LOG_ERROR, "Codec '%s' (%d) is not supported by the "
146  "bitstream filter '%s'. Supported codecs are: ",
147  desc ? desc->name : "unknown", ctx->par_in->codec_id, ctx->filter->name);
148  for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++) {
149  desc = avcodec_descriptor_get(ctx->filter->codec_ids[i]);
150  av_log(ctx, AV_LOG_ERROR, "%s (%d) ",
151  desc ? desc->name : "unknown", ctx->filter->codec_ids[i]);
152  }
153  av_log(ctx, AV_LOG_ERROR, "\n");
154  return AVERROR(EINVAL);
155  }
156  }
157 
158  /* initialize output parameters to be the same as input
159  * init below might overwrite that */
160  ret = avcodec_parameters_copy(ctx->par_out, ctx->par_in);
161  if (ret < 0)
162  return ret;
163 
164  ctx->time_base_out = ctx->time_base_in;
165 
166  if (ctx->filter->init) {
167  ret = ctx->filter->init(ctx);
168  if (ret < 0)
169  return ret;
170  }
171 
172  return 0;
173 }
174 
176 {
177  int ret;
178 
179  if (!pkt || (!pkt->data && !pkt->side_data_elems)) {
180  ctx->internal->eof = 1;
181  return 0;
182  }
183 
184  if (ctx->internal->eof) {
185  av_log(ctx, AV_LOG_ERROR, "A non-NULL packet sent after an EOF.\n");
186  return AVERROR(EINVAL);
187  }
188 
189  if (ctx->internal->buffer_pkt->data ||
191  return AVERROR(EAGAIN);
192 
193  ret = av_packet_make_refcounted(pkt);
194  if (ret < 0)
195  return ret;
197 
198  return 0;
199 }
200 
202 {
203  return ctx->filter->filter(ctx, pkt);
204 }
205 
207 {
208  AVBSFInternal *in = ctx->internal;
209  AVPacket *tmp_pkt;
210 
211  if (in->eof)
212  return AVERROR_EOF;
213 
214  if (!ctx->internal->buffer_pkt->data &&
216  return AVERROR(EAGAIN);
217 
218  tmp_pkt = av_packet_alloc();
219  if (!tmp_pkt)
220  return AVERROR(ENOMEM);
221 
222  *pkt = ctx->internal->buffer_pkt;
223  ctx->internal->buffer_pkt = tmp_pkt;
224 
225  return 0;
226 }
227 
229 {
230  AVBSFInternal *in = ctx->internal;
231 
232  if (in->eof)
233  return AVERROR_EOF;
234 
235  if (!ctx->internal->buffer_pkt->data &&
237  return AVERROR(EAGAIN);
238 
240 
241  return 0;
242 }
243 
244 typedef struct BSFListContext {
245  const AVClass *class;
246 
248  int nb_bsfs;
249 
250  unsigned idx; // index of currently processed BSF
251  unsigned flushed_idx; // index of BSF being flushed
252 
253  char * item_name;
255 
256 
257 static int bsf_list_init(AVBSFContext *bsf)
258 {
259  BSFListContext *lst = bsf->priv_data;
260  int ret, i;
261  const AVCodecParameters *cod_par = bsf->par_in;
262  AVRational tb = bsf->time_base_in;
263 
264  for (i = 0; i < lst->nb_bsfs; ++i) {
265  ret = avcodec_parameters_copy(lst->bsfs[i]->par_in, cod_par);
266  if (ret < 0)
267  goto fail;
268 
269  lst->bsfs[i]->time_base_in = tb;
270 
271  ret = av_bsf_init(lst->bsfs[i]);
272  if (ret < 0)
273  goto fail;
274 
275  cod_par = lst->bsfs[i]->par_out;
276  tb = lst->bsfs[i]->time_base_out;
277  }
278 
279  bsf->time_base_out = tb;
280  ret = avcodec_parameters_copy(bsf->par_out, cod_par);
281 
282 fail:
283  return ret;
284 }
285 
287 {
288  BSFListContext *lst = bsf->priv_data;
289  int ret;
290 
291  if (!lst->nb_bsfs)
292  return ff_bsf_get_packet_ref(bsf, out);
293 
294  while (1) {
295  if (lst->idx > lst->flushed_idx) {
296  ret = av_bsf_receive_packet(lst->bsfs[lst->idx-1], out);
297  if (ret == AVERROR(EAGAIN)) {
298  /* no more packets from idx-1, try with previous */
299  ret = 0;
300  lst->idx--;
301  continue;
302  } else if (ret == AVERROR_EOF) {
303  /* filter idx-1 is done, continue with idx...nb_bsfs */
304  lst->flushed_idx = lst->idx;
305  continue;
306  }else if (ret < 0) {
307  /* filtering error */
308  break;
309  }
310  } else {
311  ret = ff_bsf_get_packet_ref(bsf, out);
312  if (ret == AVERROR_EOF) {
313  lst->idx = lst->flushed_idx;
314  } else if (ret < 0)
315  break;
316  }
317 
318  if (lst->idx < lst->nb_bsfs) {
319  AVPacket *pkt;
320  if (ret == AVERROR_EOF && lst->idx == lst->flushed_idx) {
321  /* ff_bsf_get_packet_ref returned EOF and idx is first
322  * filter of yet not flushed filter chain */
323  pkt = NULL;
324  } else {
325  pkt = out;
326  }
327  ret = av_bsf_send_packet(lst->bsfs[lst->idx], pkt);
328  if (ret < 0)
329  break;
330  lst->idx++;
331  } else {
332  /* The end of filter chain, break to return result */
333  break;
334  }
335  }
336 
337  if (ret < 0)
338  av_packet_unref(out);
339 
340  return ret;
341 }
342 
343 static void bsf_list_close(AVBSFContext *bsf)
344 {
345  BSFListContext *lst = bsf->priv_data;
346  int i;
347 
348  for (i = 0; i < lst->nb_bsfs; ++i)
349  av_bsf_free(&lst->bsfs[i]);
350  av_freep(&lst->bsfs);
351  av_freep(&lst->item_name);
352 }
353 
354 static const char *bsf_list_item_name(void *ctx)
355 {
356  static const char *null_filter_name = "null";
357  AVBSFContext *bsf_ctx = ctx;
358  BSFListContext *lst = bsf_ctx->priv_data;
359 
360  if (!lst->nb_bsfs)
361  return null_filter_name;
362 
363  if (!lst->item_name) {
364  int i;
365  AVBPrint bp;
366  av_bprint_init(&bp, 16, 128);
367 
368  av_bprintf(&bp, "bsf_list(");
369  for (i = 0; i < lst->nb_bsfs; i++)
370  av_bprintf(&bp, i ? ",%s" : "%s", lst->bsfs[i]->filter->name);
371  av_bprintf(&bp, ")");
372 
373  av_bprint_finalize(&bp, &lst->item_name);
374  }
375 
376  return lst->item_name;
377 }
378 
379 static const AVClass bsf_list_class = {
380  .class_name = "bsf_list",
381  .item_name = bsf_list_item_name,
382  .version = LIBAVUTIL_VERSION_INT,
383 };
384 
386  .name = "bsf_list",
387  .priv_data_size = sizeof(BSFListContext),
388  .priv_class = &bsf_list_class,
389  .init = bsf_list_init,
391  .close = bsf_list_close,
392 };
393 
394 struct AVBSFList {
396  int nb_bsfs;
397 };
398 
400 {
401  return av_mallocz(sizeof(AVBSFList));
402 }
403 
405 {
406  int i;
407 
408  if (!*lst)
409  return;
410 
411  for (i = 0; i < (*lst)->nb_bsfs; ++i)
412  av_bsf_free(&(*lst)->bsfs[i]);
413  av_free((*lst)->bsfs);
414  av_freep(lst);
415 }
416 
418 {
419  return av_dynarray_add_nofree(&lst->bsfs, &lst->nb_bsfs, bsf);
420 }
421 
422 int av_bsf_list_append2(AVBSFList *lst, const char *bsf_name, AVDictionary ** options)
423 {
424  int ret;
425  const AVBitStreamFilter *filter;
426  AVBSFContext *bsf;
427 
428  filter = av_bsf_get_by_name(bsf_name);
429  if (!filter)
430  return AVERROR_BSF_NOT_FOUND;
431 
432  ret = av_bsf_alloc(filter, &bsf);
433  if (ret < 0)
434  return ret;
435 
436  if (options) {
437  ret = av_opt_set_dict2(bsf, options, AV_OPT_SEARCH_CHILDREN);
438  if (ret < 0)
439  goto end;
440  }
441 
442  ret = av_bsf_list_append(lst, bsf);
443 
444 end:
445  if (ret < 0)
446  av_bsf_free(&bsf);
447 
448  return ret;
449 }
450 
452 {
453  int ret = 0;
455 
456  if ((*lst)->nb_bsfs == 1) {
457  *bsf = (*lst)->bsfs[0];
458  av_freep(&(*lst)->bsfs);
459  (*lst)->nb_bsfs = 0;
460  goto end;
461  }
462 
463  ret = av_bsf_alloc(&ff_list_bsf, bsf);
464  if (ret < 0)
465  return ret;
466 
467  ctx = (*bsf)->priv_data;
468 
469  ctx->bsfs = (*lst)->bsfs;
470  ctx->nb_bsfs = (*lst)->nb_bsfs;
471 
472 end:
473  av_freep(lst);
474  return ret;
475 }
476 
477 static int bsf_parse_single(const char *str, AVBSFList *bsf_lst)
478 {
479  char *bsf_name, *bsf_options_str, *buf;
480  AVDictionary *bsf_options = NULL;
481  int ret = 0;
482 
483  if (!(buf = av_strdup(str)))
484  return AVERROR(ENOMEM);
485 
486  bsf_name = av_strtok(buf, "=", &bsf_options_str);
487  if (!bsf_name) {
488  ret = AVERROR(EINVAL);
489  goto end;
490  }
491 
492  if (bsf_options_str) {
493  ret = av_dict_parse_string(&bsf_options, bsf_options_str, "=", ":", 0);
494  if (ret < 0)
495  goto end;
496  }
497 
498  ret = av_bsf_list_append2(bsf_lst, bsf_name, &bsf_options);
499 
500  av_dict_free(&bsf_options);
501 end:
502  av_free(buf);
503  return ret;
504 }
505 
506 int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst)
507 {
508  AVBSFList *lst;
509  char *bsf_str, *buf, *dup, *saveptr;
510  int ret;
511 
512  if (!str)
513  return av_bsf_get_null_filter(bsf_lst);
514 
515  lst = av_bsf_list_alloc();
516  if (!lst)
517  return AVERROR(ENOMEM);
518 
519  if (!(dup = buf = av_strdup(str))) {
520  ret = AVERROR(ENOMEM);
521  goto end;
522  }
523 
524  while (1) {
525  bsf_str = av_strtok(buf, ",", &saveptr);
526  if (!bsf_str)
527  break;
528 
529  ret = bsf_parse_single(bsf_str, lst);
530  if (ret < 0)
531  goto end;
532 
533  buf = NULL;
534  }
535 
536  ret = av_bsf_list_finalize(&lst, bsf_lst);
537 end:
538  if (ret < 0)
539  av_bsf_list_free(&lst);
540  av_free(dup);
541  return ret;
542 }
543 
545 {
546  return av_bsf_alloc(&ff_list_bsf, bsf);
547 }
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:35
#define NULL
Definition: coverity.c:32
AVBSFContext ** bsfs
Definition: bsf.c:247
const AVClass * priv_class
A class for the private data, used to declare bitstream filter private AVOptions. ...
Definition: avcodec.h:5755
AVCodecParameters * par_out
Parameters of the output stream.
Definition: avcodec.h:5721
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
static void * bsf_child_next(void *obj, void *prev)
Definition: bsf.c:60
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
Memory handling functions.
unsigned idx
Definition: bsf.c:250
const char * desc
Definition: nvenc.c:65
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:1298
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5696
The bitstream filter state.
Definition: avcodec.h:5687
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
const AVBitStreamFilter * av_bsf_get_by_name(const char *name)
Structure for chain/list of bitstream filters.
Definition: bsf.c:394
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
static AVPacket pkt
static const AVClass bsf_class
Definition: bsf.c:68
int av_bsf_get_null_filter(AVBSFContext **bsf)
Get null/pass-through bitstream filter.
Definition: bsf.c:544
void * priv_data
Opaque filter-specific private data.
Definition: avcodec.h:5708
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3876
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
Definition: bsf.c:134
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:404
int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **pctx)
Allocate a context for a given bitstream filter.
Definition: bsf.c:81
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
static const AVClass bsf_list_class
Definition: bsf.c:379
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:201
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, int clip)
Definition: cfhd.c:114
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:1982
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:477
const char * name
Definition: avcodec.h:5737
uint8_t * data
Definition: avcodec.h:1430
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:647
#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:294
#define av_log(a,...)
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2003
#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:286
#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:5744
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:5727
unsigned flushed_idx
Definition: bsf.c:251
int side_data_elems
Definition: avcodec.h:1442
static void bsf_list_close(AVBSFContext *bsf)
Definition: bsf.c:343
int eof
Definition: bsf.c:32
int(* init)(AVBSFContext *ctx)
Definition: avcodec.h:5766
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:1992
#define fail()
Definition: checkasm.h:117
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3135
int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf)
Append bitstream filter to the list of bitstream filters.
Definition: bsf.c:417
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:76
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
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:422
AVRational time_base_out
The timebase used for the timestamps of the output packets.
Definition: avcodec.h:5733
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
Definition: avpacket.c:655
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:175
char * item_name
Definition: bsf.c:253
AVFormatContext * ctx
Definition: movenc.c:48
const AVClass * av_class
A class for logging and AVOptions.
Definition: avcodec.h:5691
#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:1571
int nb_bsfs
Definition: bsf.c:248
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:399
AVBSFContext ** bsfs
Definition: bsf.c:395
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
Libavcodec external API header.
void(* close)(AVBSFContext *ctx)
Definition: avcodec.h:5768
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:592
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:31
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int(* filter)(AVBSFContext *ctx, AVPacket *pkt)
Definition: avcodec.h:5767
const char * name
Name of the codec described by this descriptor.
Definition: avcodec.h:707
int nb_bsfs
Definition: bsf.c:396
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:699
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:385
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:506
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1551
const OptionDef options[]
Definition: ffmpeg_opt.c:3294
int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt)
Called by the bitstream filters to get the next packet for filtering.
Definition: bsf.c:206
static const char * bsf_list_item_name(void *ctx)
Definition: bsf.c:354
#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:257
FILE * out
Definition: movenc.c:54
#define av_freep(p)
AVBSFInternal * internal
Opaque libavcodec internal data.
Definition: avcodec.h:5702
This structure stores compressed data.
Definition: avcodec.h:1407
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5715
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
Called by bitstream filters to get packet for filtering.
Definition: bsf.c:228
#define tb
Definition: regdef.h:68
int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf)
Finalize list of bitstream filters.
Definition: bsf.c:451