FFmpeg
flacenc.c
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1 /*
2  * raw FLAC muxer
3  * Copyright (c) 2006-2009 Justin Ruggles
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 #include "libavutil/avstring.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/pixdesc.h"
26 #include "libavcodec/flac.h"
28 #include "avformat.h"
29 #include "avio_internal.h"
30 #include "flacenc.h"
31 #include "id3v2.h"
32 #include "internal.h"
33 #include "version.h"
34 #include "vorbiscomment.h"
35 
36 
37 typedef struct FlacMuxerContext {
38  const AVClass *class;
40 
43  /* audio packets are queued here until we get all the attached pictures */
45 
46  /* updated streaminfo sent by the encoder at the end */
49 
50  unsigned attached_types;
52 
53 static int flac_write_block_padding(AVIOContext *pb, unsigned int n_padding_bytes,
54  int last_block)
55 {
56  avio_w8(pb, last_block ? 0x81 : 0x01);
57  avio_wb24(pb, n_padding_bytes);
58  ffio_fill(pb, 0, n_padding_bytes);
59  return 0;
60 }
61 
63  int last_block, int bitexact)
64 {
65  const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT;
66  int64_t len;
67 
69 
70  len = ff_vorbiscomment_length(*m, vendor, NULL, 0);
71  if (len >= ((1<<24) - 4))
72  return AVERROR(EINVAL);
73 
74  avio_w8(pb, last_block ? 0x84 : 0x04);
75  avio_wb24(pb, len);
76  ff_vorbiscomment_write(pb, *m, vendor, NULL, 0);
77 
78  return 0;
79 }
80 
82 {
83  FlacMuxerContext *c = s->priv_data;
84  AVIOContext *pb = s->pb;
85  const AVPixFmtDescriptor *pixdesc;
86  const CodecMime *mime = ff_id3v2_mime_tags;
88  const char *mimetype = NULL, *desc = "";
89  const AVStream *st = s->streams[pkt->stream_index];
90  int i, mimelen, desclen, type = 0, blocklen;
91 
92  if (!pkt->data)
93  return 0;
94 
95  while (mime->id != AV_CODEC_ID_NONE) {
96  if (mime->id == st->codecpar->codec_id) {
97  mimetype = mime->str;
98  break;
99  }
100  mime++;
101  }
102  if (!mimetype) {
103  av_log(s, AV_LOG_ERROR, "No mimetype is known for stream %d, cannot "
104  "write an attached picture.\n", st->index);
105  return AVERROR(EINVAL);
106  }
107  mimelen = strlen(mimetype);
108 
109  /* get the picture type */
110  e = av_dict_get(st->metadata, "comment", NULL, 0);
111  for (i = 0; e && i < FF_ARRAY_ELEMS(ff_id3v2_picture_types); i++) {
113  type = i;
114  break;
115  }
116  }
117 
118  if ((c->attached_types & (1 << type)) & 0x6) {
119  av_log(s, AV_LOG_ERROR, "Duplicate attachment for type '%s'\n", ff_id3v2_picture_types[type]);
120  return AVERROR(EINVAL);
121  }
122 
123  if (type == 1 && (st->codecpar->codec_id != AV_CODEC_ID_PNG ||
124  st->codecpar->width != 32 ||
125  st->codecpar->height != 32)) {
126  av_log(s, AV_LOG_ERROR, "File icon attachment must be a 32x32 PNG");
127  return AVERROR(EINVAL);
128  }
129 
130  c->attached_types |= (1 << type);
131 
132  /* get the description */
133  if ((e = av_dict_get(st->metadata, "title", NULL, 0)))
134  desc = e->value;
135  desclen = strlen(desc);
136 
137  blocklen = 4 + 4 + mimelen + 4 + desclen + 4 + 4 + 4 + 4 + 4 + pkt->size;
138  if (blocklen >= 1<<24) {
139  av_log(s, AV_LOG_ERROR, "Picture block too big %d >= %d\n", blocklen, 1<<24);
140  return AVERROR(EINVAL);
141  }
142 
143  avio_w8(pb, 0x06);
144  avio_wb24(pb, blocklen);
145 
146  avio_wb32(pb, type);
147 
148  avio_wb32(pb, mimelen);
149  avio_write(pb, mimetype, mimelen);
150 
151  avio_wb32(pb, desclen);
152  avio_write(pb, desc, desclen);
153 
154  avio_wb32(pb, st->codecpar->width);
155  avio_wb32(pb, st->codecpar->height);
156  if ((pixdesc = av_pix_fmt_desc_get(st->codecpar->format)))
157  avio_wb32(pb, av_get_bits_per_pixel(pixdesc));
158  else
159  avio_wb32(pb, 0);
160  avio_wb32(pb, 0);
161 
162  avio_wb32(pb, pkt->size);
163  avio_write(pb, pkt->data, pkt->size);
164  return 0;
165 }
166 
168 {
169  int i, ret, padding = s->metadata_header_padding;
170  if (padding < 0)
171  padding = 8192;
172  /* The FLAC specification states that 24 bits are used to represent the
173  * size of a metadata block so we must clip this value to 2^24-1. */
174  padding = av_clip_uintp2(padding, 24);
175 
176  for (i = 0; i < s->nb_streams; i++) {
177  AVStream *st = s->streams[i];
178  AVPacket *pkt = st->priv_data;
179  if (!pkt)
180  continue;
183  if (ret < 0 && (s->error_recognition & AV_EF_EXPLODE))
184  return ret;
185  }
186 
187  ret = flac_write_block_comment(s->pb, &s->metadata, !padding,
188  s->flags & AVFMT_FLAG_BITEXACT);
189  if (ret)
190  return ret;
191 
192  /* The command line flac encoder defaults to placing a seekpoint
193  * every 10s. So one might add padding to allow that later
194  * but there seems to be no simple way to get the duration here.
195  * So just add the amount requested by the user. */
196  if (padding)
197  flac_write_block_padding(s->pb, padding, 1);
198 
199  return 0;
200 }
201 
202 static int flac_init(struct AVFormatContext *s)
203 {
204  AVCodecParameters *par;
205  FlacMuxerContext *c = s->priv_data;
206  int i;
207 
208  c->audio_stream_idx = -1;
209  for (i = 0; i < s->nb_streams; i++) {
210  AVStream *st = s->streams[i];
211  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
212  if (c->audio_stream_idx >= 0 || st->codecpar->codec_id != AV_CODEC_ID_FLAC) {
213  av_log(s, AV_LOG_ERROR, "Invalid audio stream. Exactly one FLAC "
214  "audio stream is required.\n");
215  return AVERROR(EINVAL);
216  }
217  par = s->streams[i]->codecpar;
218  c->audio_stream_idx = i;
219  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
221  av_log(s, AV_LOG_WARNING, "Video stream #%d is not an attached picture. Ignoring\n", i);
222  continue;
223  } else if (st->codecpar->codec_id == AV_CODEC_ID_GIF) {
224  av_log(s, AV_LOG_ERROR, "GIF image support is not implemented.\n");
225  return AVERROR_PATCHWELCOME;
226  } else if (!c->write_header) {
227  av_log(s, AV_LOG_ERROR, "Can't write attached pictures without a header.\n");
228  return AVERROR(EINVAL);
229  }
230  c->waiting_pics++;
231  } else {
232  av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in FLAC.\n");
233  return AVERROR(EINVAL);
234  }
235  }
236  if (c->audio_stream_idx < 0) {
237  av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
238  return AVERROR(EINVAL);
239  }
240 
241  /* add the channel layout tag */
243  !(par->ch_layout.u.mask & ~0x3ffffULL) &&
245  AVDictionaryEntry *chmask = av_dict_get(s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK",
246  NULL, 0);
247 
248  if (chmask) {
249  av_log(s, AV_LOG_WARNING, "A WAVEFORMATEXTENSIBLE_CHANNEL_MASK is "
250  "already present, this muxer will not overwrite it.\n");
251  } else {
252  uint8_t buf[32];
253  snprintf(buf, sizeof(buf), "0x%"PRIx64, par->ch_layout.u.mask);
254  av_dict_set(&s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
255  }
256  }
257 
258  return 0;
259 }
260 
262 {
263  FlacMuxerContext *c = s->priv_data;
264  AVCodecParameters *par = s->streams[c->audio_stream_idx]->codecpar;
265  int ret;
266 
267  if (!c->write_header)
268  return 0;
269 
270  ret = ff_flac_write_header(s->pb, par->extradata,
271  par->extradata_size, 0);
272  if (ret < 0)
273  return ret;
274 
275  if (!c->waiting_pics)
277 
278  return ret;
279 }
280 
282 {
283  FlacMuxerContext *c = s->priv_data;
284  uint8_t *streaminfo;
285  size_t streaminfo_size;
286 
287  /* check for updated streaminfo */
289  &streaminfo_size);
290  if (streaminfo && streaminfo_size == FLAC_STREAMINFO_SIZE) {
291  memcpy(c->streaminfo, streaminfo, FLAC_STREAMINFO_SIZE);
292  c->updated_streaminfo = 1;
293  }
294 
295  if (pkt->size)
296  avio_write(s->pb, pkt->data, pkt->size);
297  return 0;
298 }
299 
301 {
302  FlacMuxerContext *c = s->priv_data;
303  AVPacket *const pkt = ffformatcontext(s)->pkt;
304  int ret, write = 1;
305 
307  if (ret < 0)
308  write = 0;
309 
310  while (c->queue.head) {
311  avpriv_packet_list_get(&c->queue, pkt);
312  if (write && (ret = flac_write_audio_packet(s, pkt)) < 0)
313  write = 0;
315  }
316  return ret;
317 }
318 
320 {
321  AVIOContext *pb = s->pb;
322  int64_t file_size;
323  FlacMuxerContext *c = s->priv_data;
324 
325  if (c->waiting_pics) {
326  av_log(s, AV_LOG_WARNING, "No packets were sent for some of the "
327  "attached pictures.\n");
329  }
330 
331  if (!c->write_header || !c->updated_streaminfo)
332  return 0;
333 
334  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
335  /* rewrite the STREAMINFO header block data */
336  file_size = avio_tell(pb);
337  avio_seek(pb, 8, SEEK_SET);
338  avio_write(pb, c->streaminfo, FLAC_STREAMINFO_SIZE);
339  avio_seek(pb, file_size, SEEK_SET);
340  } else {
341  av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n");
342  }
343 
344  return 0;
345 }
346 
347 static void flac_deinit(struct AVFormatContext *s)
348 {
349  FlacMuxerContext *c = s->priv_data;
350 
351  avpriv_packet_list_free(&c->queue);
352  for (unsigned i = 0; i < s->nb_streams; i++)
353  av_packet_free((AVPacket **)&s->streams[i]->priv_data);
354 }
355 
357 {
358  FlacMuxerContext *c = s->priv_data;
359  int ret;
360 
361  if (pkt->stream_index == c->audio_stream_idx) {
362  if (c->waiting_pics) {
363  /* buffer audio packets until we get all the pictures */
364  ret = avpriv_packet_list_put(&c->queue, pkt, NULL, 0);
365  if (ret < 0) {
366  av_log(s, AV_LOG_ERROR, "Out of memory in packet queue; skipping attached pictures\n");
367  c->waiting_pics = 0;
369  if (ret < 0)
370  return ret;
371  return flac_write_audio_packet(s, pkt);
372  }
373  } else
374  return flac_write_audio_packet(s, pkt);
375  } else {
376  AVStream *st = s->streams[pkt->stream_index];
377 
378  if (!c->waiting_pics ||
380  return 0;
381 
382  /* warn only once for each stream */
383  if (st->nb_frames == 1) {
384  av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
385  " ignoring.\n", pkt->stream_index);
386  }
387  if (st->nb_frames >= 1)
388  return 0;
389 
391  if (!st->priv_data)
392  av_log(s, AV_LOG_ERROR, "Out of memory queueing an attached picture; skipping\n");
393  c->waiting_pics--;
394 
395  /* flush the buffered audio packets */
396  if (!c->waiting_pics &&
397  (ret = flac_queue_flush(s)) < 0)
398  return ret;
399  }
400 
401  return 0;
402 }
403 
404 static const AVOption flacenc_options[] = {
405  { "write_header", "Write the file header", offsetof(FlacMuxerContext, write_header), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
406  { NULL },
407 };
408 
409 static const AVClass flac_muxer_class = {
410  .class_name = "flac muxer",
411  .item_name = av_default_item_name,
412  .option = flacenc_options,
413  .version = LIBAVUTIL_VERSION_INT,
414 };
415 
417  .name = "flac",
418  .long_name = NULL_IF_CONFIG_SMALL("raw FLAC"),
419  .priv_data_size = sizeof(FlacMuxerContext),
420  .mime_type = "audio/x-flac",
421  .extensions = "flac",
422  .audio_codec = AV_CODEC_ID_FLAC,
423  .video_codec = AV_CODEC_ID_PNG,
424  .init = flac_init,
428  .deinit = flac_deinit,
430  .priv_class = &flac_muxer_class,
431 };
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:422
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
avpriv_packet_list_put
int avpriv_packet_list_put(PacketList *packet_buffer, AVPacket *pkt, int(*copy)(AVPacket *dst, const AVPacket *src), int flags)
Append an AVPacket to the list.
Definition: avpacket.c:536
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:75
LIBAVFORMAT_IDENT
#define LIBAVFORMAT_IDENT
Definition: version.h:45
avpriv_packet_list_get
int avpriv_packet_list_get(PacketList *pkt_buffer, AVPacket *pkt)
Remove the oldest AVPacket in the list and return it.
Definition: avpacket.c:575
flac_init
static int flac_init(struct AVFormatContext *s)
Definition: flacenc.c:202
AVOutputFormat::name
const char * name
Definition: avformat.h:510
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:57
FlacMuxerContext::queue
PacketList queue
Definition: flacenc.c:44
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:53
ffformatcontext
static av_always_inline FFFormatContext * ffformatcontext(AVFormatContext *s)
Definition: internal.h:192
AVStream::priv_data
void * priv_data
Definition: avformat.h:964
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2662
AV_DISPOSITION_ATTACHED_PIC
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:879
av_clip_uintp2
#define av_clip_uintp2
Definition: common.h:119
AVFMT_NOTIMESTAMPS
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:481
av_strcasecmp
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:218
id3v2.h
pixdesc.h
deinit
static void deinit(AVFormatContext *s)
Definition: chromaprint.c:49
flac_write_header
static int flac_write_header(struct AVFormatContext *s)
Definition: flacenc.c:261
AVPacket::data
uint8_t * data
Definition: packet.h:374
vorbiscomment.h
AVOption
AVOption.
Definition: opt.h:251
PacketList
Definition: packet_internal.h:31
flacenc.h
av_get_bits_per_pixel
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2614
AVDictionary
Definition: dict.c:30
AV_CODEC_ID_FLAC
@ AV_CODEC_ID_FLAC
Definition: codec_id.h:437
AVChannelLayout::order
enum AVChannelOrder order
Channel order used in this layout.
Definition: channel_layout.h:295
AVChannelLayout::mask
uint64_t mask
This member must be used for AV_CHANNEL_ORDER_NATIVE, and may be used for AV_CHANNEL_ORDER_AMBISONIC ...
Definition: channel_layout.h:322
ff_flac_is_native_layout
int ff_flac_is_native_layout(uint64_t channel_layout)
Definition: flacenc_header.c:50
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:73
init
static int init
Definition: av_tx.c:47
CodecMime
Definition: internal.h:55
flac_finish_header
static int flac_finish_header(struct AVFormatContext *s)
Definition: flacenc.c:167
flac_write_audio_packet
static int flac_write_audio_packet(struct AVFormatContext *s, AVPacket *pkt)
Definition: flacenc.c:281
ff_vorbiscomment_write
int ff_vorbiscomment_write(AVIOContext *pb, const AVDictionary *m, const char *vendor_string, AVChapter **chapters, unsigned int nb_chapters)
Write a VorbisComment into an AVIOContext.
Definition: vorbiscomment.c:65
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:505
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
flac_deinit
static void flac_deinit(struct AVFormatContext *s)
Definition: flacenc.c:347
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
AV_CHANNEL_ORDER_NATIVE
@ AV_CHANNEL_ORDER_NATIVE
The native channel order, i.e.
Definition: channel_layout.h:112
flac_muxer_class
static const AVClass flac_muxer_class
Definition: flacenc.c:409
av_dict_get
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
s
#define s(width, name)
Definition: cbs_vp9.c:256
AV_OPT_FLAG_ENCODING_PARAM
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:281
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:127
ff_vorbiscomment_metadata_conv
const AVMetadataConv ff_vorbiscomment_metadata_conv[]
VorbisComment metadata conversion mapping.
Definition: vorbiscomment.c:33
FlacMuxerContext::attached_types
unsigned attached_types
Definition: flacenc.c:50
FlacMuxerContext::updated_streaminfo
int updated_streaminfo
Definition: flacenc.c:48
AV_CODEC_ID_PNG
@ AV_CODEC_ID_PNG
Definition: codec_id.h:111
flac_write_packet
static int flac_write_packet(struct AVFormatContext *s, AVPacket *pkt)
Definition: flacenc.c:356
AVFormatContext
Format I/O context.
Definition: avformat.h:1213
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
flac_write_picture
static int flac_write_picture(struct AVFormatContext *s, AVPacket *pkt)
Definition: flacenc.c:81
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:100
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:1019
FLAC_STREAMINFO_SIZE
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
AVChannelLayout::u
union AVChannelLayout::@295 u
Details about which channels are present in this layout.
flac_write_block_padding
static int flac_write_block_padding(AVIOContext *pb, unsigned int n_padding_bytes, int last_block)
Definition: flacenc.c:53
avio_w8
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:210
ffio_fill
void ffio_fill(AVIOContext *s, int b, int64_t count)
Definition: aviobuf.c:218
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1355
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:212
ff_id3v2_picture_types
const char *const ff_id3v2_picture_types[21]
Definition: id3v2.c:108
ff_vorbiscomment_length
int64_t ff_vorbiscomment_length(const AVDictionary *m, const char *vendor_string, AVChapter **chapters, unsigned int nb_chapters)
Calculate the length in bytes of a VorbisComment.
Definition: vorbiscomment.c:41
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
ff_id3v2_mime_tags
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:132
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:1000
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:79
FlacMuxerContext::write_header
int write_header
Definition: flacenc.c:39
AVIOContext
Bytestream IO Context.
Definition: avio.h:162
AVPacket::size
int size
Definition: packet.h:375
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:116
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:263
avpriv_packet_list_free
void avpriv_packet_list_free(PacketList *pkt_buf)
Wipe the list and unref all the packets in it.
Definition: avpacket.c:589
flac_write_block_comment
static int flac_write_block_comment(AVIOContext *pb, AVDictionary **m, int last_block, int bitexact)
Definition: flacenc.c:62
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:232
avio_wb32
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:394
flac_queue_flush
static int flac_queue_flush(AVFormatContext *s)
Definition: flacenc.c:300
AV_CODEC_ID_GIF
@ AV_CODEC_ID_GIF
Definition: codec_id.h:147
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:48
AVOutputFormat
Definition: avformat.h:509
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
avio_internal.h
av_packet_get_side_data
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, size_t *size)
Get side information from packet.
Definition: avpacket.c:251
AVCodecParameters::height
int height
Definition: codec_par.h:128
ff_metadata_conv
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
FlacMuxerContext::streaminfo
uint8_t streaminfo[FLAC_STREAMINFO_SIZE]
Definition: flacenc.c:47
flacenc_options
static const AVOption flacenc_options[]
Definition: flacenc.c:404
len
int len
Definition: vorbis_enc_data.h:426
FlacMuxerContext::audio_stream_idx
int audio_stream_idx
Definition: flacenc.c:41
version.h
AVStream::disposition
int disposition
Stream disposition - a combination of AV_DISPOSITION_* flags.
Definition: avformat.h:1008
AVFMT_FLAG_BITEXACT
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1348
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:948
FlacMuxerContext::waiting_pics
int waiting_pics
Definition: flacenc.c:42
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:260
AVClass::class_name
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:71
avformat.h
FlacMuxerContext
Definition: flacenc.c:37
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:956
channel_layout.h
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
AV_PKT_DATA_NEW_EXTRADATA
@ AV_PKT_DATA_NEW_EXTRADATA
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: packet.h:56
ff_flac_write_header
int ff_flac_write_header(AVIOContext *pb, const uint8_t *extradata, int extradata_size, int last_block)
Definition: flacenc_header.c:29
AVPacket::stream_index
int stream_index
Definition: packet.h:376
CodecMime::str
char str[32]
Definition: internal.h:56
CodecMime::id
enum AVCodecID id
Definition: internal.h:57
desc
const char * desc
Definition: libsvtav1.c:83
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
packet_internal.h
FFFormatContext::pkt
AVPacket * pkt
Used to hold temporary packets for the generic demuxing code.
Definition: internal.h:142
AVCodecParameters::format
int format
Definition: codec_par.h:85
flac_write_trailer
static int flac_write_trailer(struct AVFormatContext *s)
Definition: flacenc.c:319
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
avio_wb24
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:484
ff_flac_muxer
const AVOutputFormat ff_flac_muxer
Definition: flacenc.c:416
AVDictionaryEntry
Definition: dict.h:79
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:61
AVPacket
This structure stores compressed data.
Definition: packet.h:351
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVDictionaryEntry::value
char * value
Definition: dict.h:81
write_packet
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:92
avstring.h
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:347
flac.h
snprintf
#define snprintf
Definition: snprintf.h:34
av_packet_clone
AVPacket * av_packet_clone(const AVPacket *src)
Create a new packet that references the same data as src.
Definition: avpacket.c:466