FFmpeg  3.4.9
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 
50  if (ctx->internal)
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 || (!pkt->data && !pkt->side_data_elems)) {
179  ctx->internal->eof = 1;
180  return 0;
181  }
182 
183  if (ctx->internal->eof) {
184  av_log(ctx, AV_LOG_ERROR, "A non-NULL packet sent after an EOF.\n");
185  return AVERROR(EINVAL);
186  }
187 
188  if (ctx->internal->buffer_pkt->data ||
190  return AVERROR(EAGAIN);
191 
193 
194  return 0;
195 }
196 
198 {
199  return ctx->filter->filter(ctx, pkt);
200 }
201 
203 {
204  AVBSFInternal *in = ctx->internal;
205  AVPacket *tmp_pkt;
206 
207  if (in->eof)
208  return AVERROR_EOF;
209 
210  if (!ctx->internal->buffer_pkt->data &&
212  return AVERROR(EAGAIN);
213 
214  tmp_pkt = av_packet_alloc();
215  if (!tmp_pkt)
216  return AVERROR(ENOMEM);
217 
218  *pkt = ctx->internal->buffer_pkt;
219  ctx->internal->buffer_pkt = tmp_pkt;
220 
221  return 0;
222 }
223 
225 {
226  AVBSFInternal *in = ctx->internal;
227 
228  if (in->eof)
229  return AVERROR_EOF;
230 
231  if (!ctx->internal->buffer_pkt->data &&
233  return AVERROR(EAGAIN);
234 
236 
237  return 0;
238 }
239 
240 typedef struct BSFListContext {
241  const AVClass *class;
242 
244  int nb_bsfs;
245 
246  unsigned idx; // index of currently processed BSF
247  unsigned flushed_idx; // index of BSF being flushed
248 
249  char * item_name;
251 
252 
253 static int bsf_list_init(AVBSFContext *bsf)
254 {
255  BSFListContext *lst = bsf->priv_data;
256  int ret, i;
257  const AVCodecParameters *cod_par = bsf->par_in;
258  AVRational tb = bsf->time_base_in;
259 
260  for (i = 0; i < lst->nb_bsfs; ++i) {
261  ret = avcodec_parameters_copy(lst->bsfs[i]->par_in, cod_par);
262  if (ret < 0)
263  goto fail;
264 
265  lst->bsfs[i]->time_base_in = tb;
266 
267  ret = av_bsf_init(lst->bsfs[i]);
268  if (ret < 0)
269  goto fail;
270 
271  cod_par = lst->bsfs[i]->par_out;
272  tb = lst->bsfs[i]->time_base_out;
273  }
274 
275  bsf->time_base_out = tb;
276  ret = avcodec_parameters_copy(bsf->par_out, cod_par);
277 
278 fail:
279  return ret;
280 }
281 
283 {
284  BSFListContext *lst = bsf->priv_data;
285  int ret;
286 
287  if (!lst->nb_bsfs)
288  return ff_bsf_get_packet_ref(bsf, out);
289 
290  while (1) {
291  if (lst->idx > lst->flushed_idx) {
292  ret = av_bsf_receive_packet(lst->bsfs[lst->idx-1], out);
293  if (ret == AVERROR(EAGAIN)) {
294  /* no more packets from idx-1, try with previous */
295  ret = 0;
296  lst->idx--;
297  continue;
298  } else if (ret == AVERROR_EOF) {
299  /* filter idx-1 is done, continue with idx...nb_bsfs */
300  lst->flushed_idx = lst->idx;
301  continue;
302  }else if (ret < 0) {
303  /* filtering error */
304  break;
305  }
306  } else {
307  ret = ff_bsf_get_packet_ref(bsf, out);
308  if (ret == AVERROR_EOF) {
309  lst->idx = lst->flushed_idx;
310  } else if (ret < 0)
311  break;
312  }
313 
314  if (lst->idx < lst->nb_bsfs) {
315  AVPacket *pkt;
316  if (ret == AVERROR_EOF && lst->idx == lst->flushed_idx) {
317  /* ff_bsf_get_packet_ref returned EOF and idx is first
318  * filter of yet not flushed filter chain */
319  pkt = NULL;
320  } else {
321  pkt = out;
322  }
323  ret = av_bsf_send_packet(lst->bsfs[lst->idx], pkt);
324  if (ret < 0)
325  break;
326  lst->idx++;
327  } else {
328  /* The end of filter chain, break to return result */
329  break;
330  }
331  }
332 
333  if (ret < 0)
334  av_packet_unref(out);
335 
336  return ret;
337 }
338 
339 static void bsf_list_close(AVBSFContext *bsf)
340 {
341  BSFListContext *lst = bsf->priv_data;
342  int i;
343 
344  for (i = 0; i < lst->nb_bsfs; ++i)
345  av_bsf_free(&lst->bsfs[i]);
346  av_freep(&lst->bsfs);
347  av_freep(&lst->item_name);
348 }
349 
350 static const char *bsf_list_item_name(void *ctx)
351 {
352  static const char *null_filter_name = "null";
353  AVBSFContext *bsf_ctx = ctx;
354  BSFListContext *lst = bsf_ctx->priv_data;
355 
356  if (!lst->nb_bsfs)
357  return null_filter_name;
358 
359  if (!lst->item_name) {
360  int i;
361  AVBPrint bp;
362  av_bprint_init(&bp, 16, 128);
363 
364  av_bprintf(&bp, "bsf_list(");
365  for (i = 0; i < lst->nb_bsfs; i++)
366  av_bprintf(&bp, i ? ",%s" : "%s", lst->bsfs[i]->filter->name);
367  av_bprintf(&bp, ")");
368 
369  av_bprint_finalize(&bp, &lst->item_name);
370  }
371 
372  return lst->item_name;
373 }
374 
375 static const AVClass bsf_list_class = {
376  .class_name = "bsf_list",
377  .item_name = bsf_list_item_name,
378  .version = LIBAVUTIL_VERSION_INT,
379 };
380 
382  .name = "bsf_list",
383  .priv_data_size = sizeof(BSFListContext),
384  .priv_class = &bsf_list_class,
385  .init = bsf_list_init,
387  .close = bsf_list_close,
388 };
389 
390 struct AVBSFList {
392  int nb_bsfs;
393 };
394 
396 {
397  return av_mallocz(sizeof(AVBSFList));
398 }
399 
401 {
402  int i;
403 
404  if (!*lst)
405  return;
406 
407  for (i = 0; i < (*lst)->nb_bsfs; ++i)
408  av_bsf_free(&(*lst)->bsfs[i]);
409  av_free((*lst)->bsfs);
410  av_freep(lst);
411 }
412 
414 {
415  return av_dynarray_add_nofree(&lst->bsfs, &lst->nb_bsfs, bsf);
416 }
417 
418 int av_bsf_list_append2(AVBSFList *lst, const char *bsf_name, AVDictionary ** options)
419 {
420  int ret;
421  const AVBitStreamFilter *filter;
422  AVBSFContext *bsf;
423 
424  filter = av_bsf_get_by_name(bsf_name);
425  if (!filter)
426  return AVERROR_BSF_NOT_FOUND;
427 
428  ret = av_bsf_alloc(filter, &bsf);
429  if (ret < 0)
430  return ret;
431 
432  if (options) {
433  ret = av_opt_set_dict2(bsf, options, AV_OPT_SEARCH_CHILDREN);
434  if (ret < 0)
435  goto end;
436  }
437 
438  ret = av_bsf_list_append(lst, bsf);
439 
440 end:
441  if (ret < 0)
442  av_bsf_free(&bsf);
443 
444  return ret;
445 }
446 
448 {
449  int ret = 0;
451 
452  if ((*lst)->nb_bsfs == 1) {
453  *bsf = (*lst)->bsfs[0];
454  av_freep(&(*lst)->bsfs);
455  (*lst)->nb_bsfs = 0;
456  goto end;
457  }
458 
459  ret = av_bsf_alloc(&ff_list_bsf, bsf);
460  if (ret < 0)
461  return ret;
462 
463  ctx = (*bsf)->priv_data;
464 
465  ctx->bsfs = (*lst)->bsfs;
466  ctx->nb_bsfs = (*lst)->nb_bsfs;
467 
468 end:
469  av_freep(lst);
470  return ret;
471 }
472 
473 static int bsf_parse_single(const char *str, AVBSFList *bsf_lst)
474 {
475  char *bsf_name, *bsf_options_str, *buf;
476  AVDictionary *bsf_options = NULL;
477  int ret = 0;
478 
479  if (!(buf = av_strdup(str)))
480  return AVERROR(ENOMEM);
481 
482  bsf_name = av_strtok(buf, "=", &bsf_options_str);
483  if (!bsf_name) {
484  ret = AVERROR(EINVAL);
485  goto end;
486  }
487 
488  if (bsf_options_str) {
489  ret = av_dict_parse_string(&bsf_options, bsf_options_str, "=", ":", 0);
490  if (ret < 0)
491  goto end;
492  }
493 
494  ret = av_bsf_list_append2(bsf_lst, bsf_name, &bsf_options);
495 
496  av_dict_free(&bsf_options);
497 end:
498  av_free(buf);
499  return ret;
500 }
501 
502 int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst)
503 {
504  AVBSFList *lst;
505  char *bsf_str, *buf, *dup, *saveptr;
506  int ret;
507 
508  if (!str)
509  return av_bsf_get_null_filter(bsf_lst);
510 
511  lst = av_bsf_list_alloc();
512  if (!lst)
513  return AVERROR(ENOMEM);
514 
515  if (!(dup = buf = av_strdup(str))) {
516  ret = AVERROR(ENOMEM);
517  goto end;
518  }
519 
520  while (1) {
521  bsf_str = av_strtok(buf, ",", &saveptr);
522  if (!bsf_str)
523  break;
524 
525  ret = bsf_parse_single(bsf_str, lst);
526  if (ret < 0)
527  goto end;
528 
529  buf = NULL;
530  }
531 
532  ret = av_bsf_list_finalize(&lst, bsf_lst);
533 end:
534  if (ret < 0)
535  av_bsf_list_free(&lst);
536  av_free(dup);
537  return ret;
538 }
539 
541 {
542  return av_bsf_alloc(&ff_list_bsf, bsf);
543 }
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:243
const AVClass * priv_class
A class for the private data, used to declare bitstream filter private AVOptions. ...
Definition: avcodec.h:5982
AVCodecParameters * par_out
Parameters of the output stream.
Definition: avcodec.h:5948
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:86
Memory handling functions.
unsigned idx
Definition: bsf.c:246
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:4152
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5923
The bitstream filter state.
Definition: avcodec.h:5914
int(* init)(AVBSFContext *ctx)
Definition: avcodec.h:5993
const AVBitStreamFilter * av_bsf_get_by_name(const char *name)
Structure for chain/list of bitstream filters.
Definition: bsf.c:390
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:540
void * priv_data
Opaque filter-specific private data.
Definition: avcodec.h:5935
This struct describes the properties of an encoded stream.
Definition: avcodec.h:4144
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:400
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
static const AVClass bsf_list_class
Definition: bsf.c:375
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:197
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:2325
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:473
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:5964
uint8_t * data
Definition: avcodec.h:1679
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: avpacket.c:673
#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:2346
#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:282
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:5971
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:5954
void(* close)(AVBSFContext *ctx)
Definition: avcodec.h:5995
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
unsigned flushed_idx
Definition: bsf.c:247
int side_data_elems
Definition: avcodec.h:1691
static void bsf_list_close(AVBSFContext *bsf)
Definition: bsf.c:339
int eof
Definition: bsf.c:32
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:2335
#define fail()
Definition: checkasm.h:109
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3121
int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf)
Append bitstream filter to the list of bitstream filters.
Definition: bsf.c:413
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&#39;s name and options and append it to the list of bitst...
Definition: bsf.c:418
AVRational time_base_out
The timebase used for the timestamps of the output packets.
Definition: avcodec.h:5960
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:176
char * item_name
Definition: bsf.c:249
AVFormatContext * ctx
Definition: movenc.c:48
const AVClass * av_class
A class for logging and AVOptions.
Definition: avcodec.h:5918
#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:244
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
int(* filter)(AVBSFContext *ctx, AVPacket *pkt)
Definition: avcodec.h:5994
AVBSFList * av_bsf_list_alloc(void)
Allocate empty list of bitstream filters.
Definition: bsf.c:395
AVBSFContext ** bsfs
Definition: bsf.c:391
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:237
Libavcodec external API header.
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:618
void * buf
Definition: avisynth_c.h:690
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;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);return NULL;} return ac;} 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;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->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);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
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
const char * name
Name of the codec described by this descriptor.
Definition: avcodec.h:711
int nb_bsfs
Definition: bsf.c:392
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:703
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:381
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:502
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:202
static const char * bsf_list_item_name(void *ctx)
Definition: bsf.c:350
#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:253
FILE * out
Definition: movenc.c:54
#define av_freep(p)
AVBSFInternal * internal
Opaque libavcodec internal data.
Definition: avcodec.h:5929
This structure stores compressed data.
Definition: avcodec.h:1656
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5942
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
Called by bitstream filters to get packet for filtering.
Definition: bsf.c:224
#define tb
Definition: regdef.h:68
int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf)
Finalize list of bitstream filters.
Definition: bsf.c:447