FFmpeg
riffenc.c
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1 /*
2  * RIFF muxing functions
3  * Copyright (c) 2000 Fabrice Bellard
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/channel_layout.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/log.h"
25 #include "libavutil/mathematics.h"
26 #include "libavcodec/bytestream.h"
27 #include "avformat.h"
28 #include "avio_internal.h"
29 #include "riff.h"
30 
31 int64_t ff_start_tag(AVIOContext *pb, const char *tag)
32 {
33  ffio_wfourcc(pb, tag);
34  avio_wl32(pb, -1);
35  return avio_tell(pb);
36 }
37 
38 void ff_end_tag(AVIOContext *pb, int64_t start)
39 {
40  int64_t pos;
41 
42  av_assert0((start&1) == 0);
43 
44  pos = avio_tell(pb);
45  if (pos & 1)
46  avio_w8(pb, 0);
47  avio_seek(pb, start - 4, SEEK_SET);
48  avio_wl32(pb, (uint32_t)(pos - start));
49  avio_seek(pb, FFALIGN(pos, 2), SEEK_SET);
50 }
51 
52 /* WAVEFORMATEX header */
53 /* returns the size or -1 on error */
54 int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb,
55  AVCodecParameters *par, int flags)
56 {
57  int bps, blkalign, bytespersec, frame_size;
58  int hdrsize;
59  int64_t hdrstart = avio_tell(pb);
60  int waveformatextensible;
61  uint8_t temp[256];
62  uint8_t *riff_extradata = temp;
63  uint8_t *riff_extradata_start = temp;
64 
65  if (!par->codec_tag || par->codec_tag > 0xffff)
66  return -1;
67 
68  if (par->codec_id == AV_CODEC_ID_ADPCM_SWF && par->block_align == 0) {
69  av_log(s, AV_LOG_ERROR, "%s can only be written to WAVE with a constant frame size\n",
70  avcodec_get_name(par->codec_id));
71  return AVERROR(EINVAL);
72  }
73 
74  /* We use the known constant frame size for the codec if known, otherwise
75  * fall back on using AVCodecParameters.frame_size, which is not as reliable
76  * for indicating packet duration. */
77  frame_size = av_get_audio_frame_duration2(par, par->block_align);
78 
79  waveformatextensible = (par->ch_layout.order == AV_CHANNEL_ORDER_NATIVE &&
80  av_channel_layout_compare(&par->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO) &&
81  av_channel_layout_compare(&par->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) ||
82  par->sample_rate > 48000 ||
83  par->codec_id == AV_CODEC_ID_EAC3 || par->codec_id == AV_CODEC_ID_DFPWM ||
84  (av_get_bits_per_sample(par->codec_id) > 16 && par->codec_tag != 0x0003);
85 
86  if (waveformatextensible)
87  avio_wl16(pb, 0xfffe);
88  else
89  avio_wl16(pb, par->codec_tag);
90 
91  avio_wl16(pb, par->ch_layout.nb_channels);
92  avio_wl32(pb, par->sample_rate);
93  if (par->codec_id == AV_CODEC_ID_ATRAC3 ||
94  par->codec_id == AV_CODEC_ID_G723_1 ||
95  par->codec_id == AV_CODEC_ID_G728 ||
96  par->codec_id == AV_CODEC_ID_MP2 ||
97  par->codec_id == AV_CODEC_ID_MP3 ||
98  par->codec_id == AV_CODEC_ID_GSM_MS) {
99  bps = 0;
100  } else {
101  if (!(bps = av_get_bits_per_sample(par->codec_id))) {
102  if (par->bits_per_coded_sample)
103  bps = par->bits_per_coded_sample;
104  else
105  bps = 16; // default to 16
106  }
107  }
108  if (bps != par->bits_per_coded_sample && par->bits_per_coded_sample) {
109  av_log(s, AV_LOG_WARNING,
110  "requested bits_per_coded_sample (%d) "
111  "and actually stored (%d) differ\n",
112  par->bits_per_coded_sample, bps);
113  }
114 
115  if (par->codec_id == AV_CODEC_ID_MP2) {
116  blkalign = (144 * par->bit_rate - 1)/par->sample_rate + 1;
117  } else if (par->codec_id == AV_CODEC_ID_MP3) {
118  blkalign = 576 * (par->sample_rate <= (24000 + 32000)/2 ? 1 : 2);
119  } else if (par->codec_id == AV_CODEC_ID_AC3) {
120  blkalign = 3840; /* maximum bytes per frame */
121  } else if (par->codec_id == AV_CODEC_ID_AAC) {
122  blkalign = 768 * par->ch_layout.nb_channels; /* maximum bytes per frame */
123  } else if (par->codec_id == AV_CODEC_ID_G723_1) {
124  blkalign = 24;
125  } else if (par->block_align != 0) { /* specified by the codec */
126  blkalign = par->block_align;
127  } else
128  blkalign = bps * par->ch_layout.nb_channels / av_gcd(8, bps);
129  if (par->codec_id == AV_CODEC_ID_PCM_U8 ||
130  par->codec_id == AV_CODEC_ID_PCM_S24LE ||
131  par->codec_id == AV_CODEC_ID_PCM_S32LE ||
132  par->codec_id == AV_CODEC_ID_PCM_F32LE ||
133  par->codec_id == AV_CODEC_ID_PCM_F64LE ||
134  par->codec_id == AV_CODEC_ID_PCM_S16LE) {
135  bytespersec = par->sample_rate * blkalign;
136  } else if (par->codec_id == AV_CODEC_ID_G723_1) {
137  bytespersec = 800;
138  } else if (par->codec_id == AV_CODEC_ID_ADPCM_MS ||
139  par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
140  if (frame_size <= 0) {
141  av_log(s, AV_LOG_ERROR, "Invalid block_align or bps for %s\n",
142  avcodec_get_name(par->codec_id));
143  return AVERROR(EINVAL);
144  }
145  bytespersec = (int64_t)par->sample_rate * blkalign / frame_size;
146  } else {
147  bytespersec = par->bit_rate / 8;
148  }
149  avio_wl32(pb, bytespersec); /* bytes per second */
150  avio_wl16(pb, blkalign); /* block align */
151  avio_wl16(pb, bps); /* bits per sample */
152  if (par->codec_id == AV_CODEC_ID_MP3) {
153  bytestream_put_le16(&riff_extradata, 1); /* wID */
154  bytestream_put_le32(&riff_extradata, 2); /* fdwFlags */
155  bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
156  bytestream_put_le16(&riff_extradata, 1); /* nFramesPerBlock */
157  bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
158  } else if (par->codec_id == AV_CODEC_ID_MP2) {
159  /* fwHeadLayer */
160  bytestream_put_le16(&riff_extradata, 2);
161  /* dwHeadBitrate */
162  bytestream_put_le32(&riff_extradata, par->bit_rate);
163  /* fwHeadMode */
164  bytestream_put_le16(&riff_extradata, par->ch_layout.nb_channels == 2 ? 1 : 8);
165  /* fwHeadModeExt */
166  bytestream_put_le16(&riff_extradata, 0);
167  /* wHeadEmphasis */
168  bytestream_put_le16(&riff_extradata, 1);
169  /* fwHeadFlags */
170  bytestream_put_le16(&riff_extradata, 16);
171  /* dwPTSLow */
172  bytestream_put_le32(&riff_extradata, 0);
173  /* dwPTSHigh */
174  bytestream_put_le32(&riff_extradata, 0);
175  } else if (par->codec_id == AV_CODEC_ID_G723_1) {
176  bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */
177  bytestream_put_le32(&riff_extradata, 0xaea2f732);
178  bytestream_put_le16(&riff_extradata, 0xacde);
179  } else if (par->codec_id == AV_CODEC_ID_GSM_MS ||
180  par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
181  /* wSamplesPerBlock */
182  bytestream_put_le16(&riff_extradata, frame_size);
183  } else if (par->extradata_size) {
184  riff_extradata_start = par->extradata;
185  riff_extradata = par->extradata + par->extradata_size;
186  }
187  /* write WAVEFORMATEXTENSIBLE extensions */
188  if (waveformatextensible) {
189  int write_channel_mask = !(flags & FF_PUT_WAV_HEADER_SKIP_CHANNELMASK) &&
190  (s->strict_std_compliance < FF_COMPLIANCE_NORMAL ||
191  par->ch_layout.u.mask < 0x40000);
192  /* 22 is WAVEFORMATEXTENSIBLE size */
193  avio_wl16(pb, riff_extradata - riff_extradata_start + 22);
194  /* ValidBitsPerSample || SamplesPerBlock || Reserved */
195  avio_wl16(pb, bps);
196  /* dwChannelMask */
197  avio_wl32(pb, write_channel_mask ? par->ch_layout.u.mask : 0);
198  /* GUID + next 3 */
199  if (par->codec_id == AV_CODEC_ID_EAC3 || par->codec_id == AV_CODEC_ID_DFPWM) {
200  ff_put_guid(pb, ff_get_codec_guid(par->codec_id, ff_codec_wav_guids));
201  } else {
202  avio_wl32(pb, par->codec_tag);
203  avio_wl32(pb, 0x00100000);
204  avio_wl32(pb, 0xAA000080);
205  avio_wl32(pb, 0x719B3800);
206  }
207  } else if ((flags & FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX) ||
208  par->codec_tag != 0x0001 /* PCM */ ||
209  riff_extradata - riff_extradata_start) {
210  /* WAVEFORMATEX */
211  if (par->codec_tag == 0x1610) {
212  /* HEAACWAVEFORMAT */
213  avio_wl16(pb, par->extradata_size + 12); /* cbSize */
214  avio_wl16(pb, !par->extradata_size); // wPayloadType, 0 = Raw, 1 = ADTS
215  avio_wl16(pb, 0xFE); // wAudioProfileLevelIndication, 0xFE = unspecified
216  avio_wl16(pb, 0); // wStructType, 0 = AudioSpecificConfig()
217  avio_wl16(pb, 0); // wReserved1
218  avio_wl32(pb, 0); // dwReserved2
219  } else if (par->codec_tag == 0xFF && !par->extradata_size) {
220  av_log(s, AV_LOG_ERROR, "ADTS is only supported with codec tag 0x1610\n");
221  return AVERROR(EINVAL);
222  } else
223  avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */
224  } /* else PCMWAVEFORMAT */
225  avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
226  hdrsize = avio_tell(pb) - hdrstart;
227  if (hdrsize & 1) {
228  hdrsize++;
229  avio_w8(pb, 0);
230  }
231 
232  return hdrsize;
233 }
234 
235 /* BITMAPINFOHEADER header */
236 void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters *par,
237  int for_asf, int ignore_extradata, int rgb_frame_is_flipped)
238 {
239  int flipped_extradata = (par->extradata_size >= 9 &&
240  !memcmp(par->extradata + par->extradata_size - 9, "BottomUp", 9));
241  int keep_height = flipped_extradata || rgb_frame_is_flipped;
242  int extradata_size = par->extradata_size - 9*flipped_extradata;
243  enum AVPixelFormat pix_fmt = par->format;
244  int pal_avi;
245 
246  if (pix_fmt == AV_PIX_FMT_NONE && par->bits_per_coded_sample == 1)
247  pix_fmt = AV_PIX_FMT_MONOWHITE;
248  pal_avi = !for_asf &&
249  (pix_fmt == AV_PIX_FMT_PAL8 ||
250  pix_fmt == AV_PIX_FMT_MONOWHITE ||
251  pix_fmt == AV_PIX_FMT_MONOBLACK);
252 
253  /* Size (not including the size of the color table or color masks) */
254  avio_wl32(pb, 40 + (ignore_extradata || pal_avi ? 0 : extradata_size));
255  avio_wl32(pb, par->width);
256  //We always store RGB TopDown
257  avio_wl32(pb, par->codec_tag || keep_height ? par->height : -par->height);
258  /* planes */
259  avio_wl16(pb, 1);
260  /* depth */
261  avio_wl16(pb, par->bits_per_coded_sample ? par->bits_per_coded_sample : 24);
262  /* compression type */
263  // MSRLE compatibility with Media Player 3.1 and Windows 95
264  avio_wl32(pb, par->codec_id == AV_CODEC_ID_MSRLE ? 1 : par->codec_tag);
265  avio_wl32(pb, (par->width * par->height * (par->bits_per_coded_sample ? par->bits_per_coded_sample : 24)+7) / 8);
266  avio_wl32(pb, 0);
267  avio_wl32(pb, 0);
268  /* Number of color indices in the color table that are used.
269  * A value of 0 means 2^biBitCount indices, but this doesn't work
270  * with Windows Media Player and files containing xxpc chunks. */
271  // MSRLE on Windows 95 requires a zero here
272  avio_wl32(pb, pal_avi && par->codec_id != AV_CODEC_ID_MSRLE ? 1 << par->bits_per_coded_sample : 0);
273  avio_wl32(pb, 0);
274 
275  if (!ignore_extradata) {
276  if (par->extradata_size) {
277  avio_write(pb, par->extradata, extradata_size);
278  if (!for_asf && extradata_size & 1)
279  avio_w8(pb, 0);
280  } else if (pal_avi) {
281  int i;
282  for (i = 0; i < 1 << par->bits_per_coded_sample; i++) {
283  /* Initialize 1 bpp palette to black & white */
284  if (i == 0 && pix_fmt == AV_PIX_FMT_MONOWHITE)
285  avio_wl32(pb, 0xffffff);
286  else if (i == 1 && pix_fmt == AV_PIX_FMT_MONOBLACK)
287  avio_wl32(pb, 0xffffff);
288  else
289  avio_wl32(pb, 0);
290  }
291  }
292  }
293 }
294 
295 void ff_parse_specific_params(AVStream *st, int *au_rate,
296  int *au_ssize, int *au_scale)
297 {
298  AVCodecParameters *par = st->codecpar;
299  int gcd;
300  int audio_frame_size;
301 
302  audio_frame_size = av_get_audio_frame_duration2(par, 0);
303  if (!audio_frame_size)
304  audio_frame_size = par->frame_size;
305 
306  *au_ssize = par->block_align;
307  if (audio_frame_size && par->sample_rate) {
308  *au_scale = audio_frame_size;
309  *au_rate = par->sample_rate;
310  } else if (par->codec_type == AVMEDIA_TYPE_VIDEO ||
311  par->codec_type == AVMEDIA_TYPE_DATA ||
312  par->codec_type == AVMEDIA_TYPE_SUBTITLE) {
313  *au_scale = st->time_base.num;
314  *au_rate = st->time_base.den;
315  } else {
316  *au_scale = par->block_align ? par->block_align * 8 : 8;
317  *au_rate = par->bit_rate ? par->bit_rate :
318  8 * par->sample_rate;
319  }
320  gcd = av_gcd(*au_scale, *au_rate);
321  *au_scale /= gcd;
322  *au_rate /= gcd;
323 }
324 
325 void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
326 {
327  size_t len = strlen(str);
328  if (len > 0 && len < UINT32_MAX) {
329  len++;
330  ffio_wfourcc(pb, tag);
331  avio_wl32(pb, len);
332  avio_put_str(pb, str);
333  if (len & 1)
334  avio_w8(pb, 0);
335  }
336 }
337 
338 static const char riff_tags[][5] = {
339  "IARL", "IART", "IAS1", "IAS2", "IAS3", "IAS4", "IAS5", "IAS6", "IAS7",
340  "IAS8", "IAS9", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI",
341  "IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD",
342  "IPRT", "ITRK", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH",
343  { 0 }
344 };
345 
346 static int riff_has_valid_tags(AVFormatContext *s)
347 {
348  int i;
349 
350  for (i = 0; *riff_tags[i]; i++)
351  if (av_dict_get(s->metadata, riff_tags[i], NULL, AV_DICT_MATCH_CASE))
352  return 1;
353 
354  return 0;
355 }
356 
357 void ff_riff_write_info(AVFormatContext *s)
358 {
359  AVIOContext *pb = s->pb;
360  int i;
361  int64_t list_pos;
362  AVDictionaryEntry *t = NULL;
363 
364  ff_metadata_conv(&s->metadata, ff_riff_info_conv, NULL);
365 
366  /* writing empty LIST is not nice and may cause problems */
367  if (!riff_has_valid_tags(s))
368  return;
369 
370  list_pos = ff_start_tag(pb, "LIST");
371  ffio_wfourcc(pb, "INFO");
372  for (i = 0; *riff_tags[i]; i++)
373  if ((t = av_dict_get(s->metadata, riff_tags[i],
374  NULL, AV_DICT_MATCH_CASE)))
375  ff_riff_write_info_tag(s->pb, t->key, t->value);
376  ff_end_tag(pb, list_pos);
377 }
378 
379 void ff_put_guid(AVIOContext *s, const ff_asf_guid *g)
380 {
381  av_assert0(sizeof(*g) == 16);
382  avio_write(s, *g, sizeof(*g));
383 }
384 
385 const ff_asf_guid *ff_get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid)
386 {
387  int i;
388  for (i = 0; av_guid[i].id != AV_CODEC_ID_NONE; i++) {
389  if (id == av_guid[i].id)
390  return &(av_guid[i].guid);
391  }
392  return NULL;
393 }
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:339
flags
const SwsFlags flags[]
Definition: swscale.c:85
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:203
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:216
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:71
AV_CODEC_ID_ADPCM_MS
@ AV_CODEC_ID_ADPCM_MS
Definition: codec_id.h:384
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:464
AVCodecParameters::av_get_audio_frame_duration2
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
Definition: utils.c:808
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
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:53
ffio_wfourcc
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:124
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:395
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:49
int64_t
long long int64_t
Definition: coverity.c:34
ff_metadata_conv
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
ff_parse_specific_params
void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale)
Definition: riffenc.c:295
AV_PIX_FMT_MONOWHITE
@ AV_PIX_FMT_MONOWHITE
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb.
Definition: pixfmt.h:82
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:61
mathematics.h
AVChannelLayout::order
enum AVChannelOrder order
Channel order used in this layout.
Definition: channel_layout.h:324
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:351
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:329
ff_put_guid
void ff_put_guid(AVIOContext *s, const ff_asf_guid *g)
Definition: riffenc.c:379
av_gcd
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
Definition: mathematics.c:37
avio_wl16
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:440
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:494
AV_CODEC_ID_MP3
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:462
AVRational::num
int num
Numerator.
Definition: rational.h:59
AV_CODEC_ID_ATRAC3
@ AV_CODEC_ID_ATRAC3
Definition: codec_id.h:492
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:541
AVChannelLayout::u
union AVChannelLayout::@518 u
Details about which channels are present in this layout.
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:210
ff_get_codec_guid
const ff_asf_guid * ff_get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid)
Definition: riffenc.c:385
AVCodecParameters::frame_size
int frame_size
Audio frame size, if known.
Definition: codec_par.h:227
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:60
s
#define s(width, name)
Definition: cbs_vp9.c:198
g
const char * g
Definition: vf_curves.c:128
pix_fmt
static enum AVPixelFormat pix_fmt
Definition: demux_decode.c:41
AVDictionaryEntry::key
char * key
Definition: dict.h:91
frame_size
int frame_size
Definition: mxfenc.c:2489
AVCodecParameters::width
int width
The width of the video frame in pixels.
Definition: codec_par.h:143
AV_CODEC_ID_MP2
@ AV_CODEC_ID_MP2
Definition: codec_id.h:461
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:42
AVMEDIA_TYPE_DATA
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:202
ff_riff_write_info
void ff_riff_write_info(AVFormatContext *s)
Write all recognized RIFF tags from s->metadata.
Definition: riffenc.c:357
AVFormatContext
Format I/O context.
Definition: avformat.h:1314
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:770
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:786
NULL
#define NULL
Definition: coverity.c:32
ff_asf_guid
uint8_t ff_asf_guid[16]
Definition: riff.h:96
ff_put_bmp_header
void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters *par, int for_asf, int ignore_extradata, int rgb_frame_is_flipped)
Definition: riffenc.c:236
AV_PIX_FMT_MONOBLACK
@ AV_PIX_FMT_MONOBLACK
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb.
Definition: pixfmt.h:83
AV_CODEC_ID_G723_1
@ AV_CODEC_ID_G723_1
Definition: codec_id.h:513
avio_w8
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:184
AV_CODEC_ID_G728
@ AV_CODEC_ID_G728
Definition: codec_id.h:568
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
The channel layout and number of channels.
Definition: codec_par.h:207
AVCodecParameters::sample_rate
int sample_rate
The number of audio samples per second.
Definition: codec_par.h:213
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:49
AV_CODEC_ID_EAC3
@ AV_CODEC_ID_EAC3
Definition: codec_id.h:501
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:75
AV_CODEC_ID_AAC
@ AV_CODEC_ID_AAC
Definition: codec_id.h:463
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
AV_CODEC_ID_PCM_S24LE
@ AV_CODEC_ID_PCM_S24LE
Definition: codec_id.h:351
ff_end_tag
void ff_end_tag(AVIOContext *pb, int64_t start)
Definition: riffenc.c:38
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:319
i
#define i(width, name, range_min, range_max)
Definition: cbs_h264.c:63
AVCodecGuid::id
enum AVCodecID id
Definition: riff.h:99
bps
unsigned bps
Definition: movenc.c:2055
AV_CODEC_ID_ADPCM_SWF
@ AV_CODEC_ID_ADPCM_SWF
Definition: codec_id.h:391
AVCodecGuid
Definition: riff.h:98
FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX
#define FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX
Tell ff_put_wav_header() to use WAVEFORMATEX even for PCM codecs.
Definition: riff.h:53
ff_riff_info_conv
const AVMetadataConv ff_riff_info_conv[]
Definition: riff.c:637
AV_CODEC_ID_MSRLE
@ AV_CODEC_ID_MSRLE
Definition: codec_id.h:97
FF_PUT_WAV_HEADER_SKIP_CHANNELMASK
#define FF_PUT_WAV_HEADER_SKIP_CHANNELMASK
Tell ff_put_wav_header() to write an empty channel mask.
Definition: riff.h:58
ff_riff_write_info_tag
void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
Write a single RIFF info tag.
Definition: riffenc.c:325
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:206
FF_COMPLIANCE_NORMAL
#define FF_COMPLIANCE_NORMAL
Definition: defs.h:60
avio_wl32
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:360
AV_CHANNEL_ORDER_NATIVE
@ AV_CHANNEL_ORDER_NATIVE
The native channel order, i.e.
Definition: channel_layout.h:125
av_channel_layout_compare
int av_channel_layout_compare(const AVChannelLayout *chl, const AVChannelLayout *chl1)
Check whether two channel layouts are semantically the same, i.e.
Definition: channel_layout.c:811
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:406
riff_tags
static const char riff_tags[][5]
Definition: riffenc.c:338
log.h
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
avio_internal.h
ff_start_tag
int64_t ff_start_tag(AVIOContext *pb, const char *tag)
Definition: riffenc.c:31
AVCodecParameters::height
int height
The height of the video frame in pixels.
Definition: codec_par.h:150
AVCodecParameters::block_align
int block_align
The number of bytes per coded audio frame, required by some formats.
Definition: codec_par.h:221
riff_has_valid_tags
static int riff_has_valid_tags(AVFormatContext *s)
Definition: riffenc.c:346
len
int len
Definition: vorbis_enc_data.h:426
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:84
AV_CODEC_ID_GSM_MS
@ AV_CODEC_ID_GSM_MS
Definition: codec_id.h:491
tag
uint32_t tag
Definition: movenc.c:2054
AVStream
Stream structure.
Definition: avformat.h:747
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:236
pos
unsigned int pos
Definition: spdifenc.c:414
avformat.h
dict.h
AV_DICT_MATCH_CASE
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:74
channel_layout.h
AVRational::den
int den
Denominator.
Definition: rational.h:60
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
temp
else temp
Definition: vf_mcdeint.c:271
ff_put_wav_header
int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int flags)
Write WAVEFORMAT header structure.
Definition: riffenc.c:54
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:200
AV_CODEC_ID_PCM_S32LE
@ AV_CODEC_ID_PCM_S32LE
Definition: codec_id.h:347
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:113
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:344
AVCodecParameters::format
int format
Definition: codec_par.h:94
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:394
AV_CODEC_ID_PCM_F64LE
@ AV_CODEC_ID_PCM_F64LE
Definition: codec_id.h:362
AVDictionaryEntry
Definition: dict.h:90
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:57
AV_CODEC_ID_ADPCM_IMA_WAV
@ AV_CODEC_ID_ADPCM_IMA_WAV
Definition: codec_id.h:379
riff.h
ff_codec_wav_guids
const AVCodecGuid ff_codec_wav_guids[]
Definition: riff.c:664
bytestream.h
AV_CODEC_ID_DFPWM
@ AV_CODEC_ID_DFPWM
Definition: codec_id.h:557
AV_CODEC_ID_PCM_F32LE
@ AV_CODEC_ID_PCM_F32LE
Definition: codec_id.h:360
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:99
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVCodecGuid::guid
ff_asf_guid guid
Definition: riff.h:100
AVDictionaryEntry::value
char * value
Definition: dict.h:92
avio_put_str
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
Definition: aviobuf.c:376
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