FFmpeg
rpl.c
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1 /*
2  * ARMovie/RPL demuxer
3  * Copyright (c) 2007 Christian Ohm, 2008 Eli Friedman
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 <inttypes.h>
23 #include <stdlib.h>
24 
25 #include "libavutil/avstring.h"
26 #include "libavutil/dict.h"
27 #include "avformat.h"
28 #include "internal.h"
29 
30 #define RPL_SIGNATURE "ARMovie\x0A"
31 #define RPL_SIGNATURE_SIZE 8
32 
33 /** 256 is arbitrary, but should be big enough for any reasonable file. */
34 #define RPL_LINE_LENGTH 256
35 
36 static int rpl_probe(const AVProbeData *p)
37 {
38  if (memcmp(p->buf, RPL_SIGNATURE, RPL_SIGNATURE_SIZE))
39  return 0;
40 
41  return AVPROBE_SCORE_MAX;
42 }
43 
44 typedef struct RPLContext {
45  // RPL header data
47 
48  // Stream position data
49  uint32_t chunk_number;
50  uint32_t chunk_part;
51  uint32_t frame_in_part;
52 } RPLContext;
53 
54 static int read_line(AVIOContext * pb, char* line, int bufsize)
55 {
56  int i;
57  for (i = 0; i < bufsize - 1; i++) {
58  int b = avio_r8(pb);
59  if (b == 0)
60  break;
61  if (b == '\n') {
62  line[i] = '\0';
63  return avio_feof(pb) ? -1 : 0;
64  }
65  line[i] = b;
66  }
67  line[i] = '\0';
68  return -1;
69 }
70 
71 static int32_t read_int(const char* line, const char** endptr, int* error)
72 {
73  unsigned long result = 0;
74  for (; *line>='0' && *line<='9'; line++) {
75  if (result > (0x7FFFFFFF - 9) / 10)
76  *error = -1;
77  result = 10 * result + *line - '0';
78  }
79  *endptr = line;
80  return result;
81 }
82 
84 {
85  char line[RPL_LINE_LENGTH];
86  const char *endptr;
87  *error |= read_line(pb, line, sizeof(line));
88  return read_int(line, &endptr, error);
89 }
90 
91 /** Parsing for fps, which can be a fraction. Unfortunately,
92  * the spec for the header leaves out a lot of details,
93  * so this is mostly guessing.
94  */
95 static AVRational read_fps(const char* line, int* error)
96 {
97  int64_t num, den = 1;
99  num = read_int(line, &line, error);
100  if (*line == '.')
101  line++;
102  for (; *line>='0' && *line<='9'; line++) {
103  // Truncate any numerator too large to fit into an int64_t
104  if (num > (INT64_MAX - 9) / 10 || den > INT64_MAX / 10)
105  break;
106  num = 10 * num + (*line - '0');
107  den *= 10;
108  }
109  if (!num)
110  *error = -1;
111  av_reduce(&result.num, &result.den, num, den, 0x7FFFFFFF);
112  return result;
113 }
114 
116 {
117  AVIOContext *pb = s->pb;
118  RPLContext *rpl = s->priv_data;
119  AVStream *vst = NULL, *ast = NULL;
120  int total_audio_size;
121  int error = 0;
122  const char *endptr;
123  char audio_type[RPL_LINE_LENGTH];
124  char audio_codec[RPL_LINE_LENGTH];
125 
126  uint32_t i;
127 
128  int32_t video_format, audio_format, chunk_catalog_offset, number_of_chunks;
129  AVRational fps;
130 
131  char line[RPL_LINE_LENGTH];
132 
133  // The header for RPL/ARMovie files is 21 lines of text
134  // containing the various header fields. The fields are always
135  // in the same order, and other text besides the first
136  // number usually isn't important.
137  // (The spec says that there exists some significance
138  // for the text in a few cases; samples needed.)
139  error |= read_line(pb, line, sizeof(line)); // ARMovie
140  error |= read_line(pb, line, sizeof(line)); // movie name
141  av_dict_set(&s->metadata, "title" , line, 0);
142  error |= read_line(pb, line, sizeof(line)); // date/copyright
143  av_dict_set(&s->metadata, "copyright", line, 0);
144  error |= read_line(pb, line, sizeof(line)); // author and other
145  av_dict_set(&s->metadata, "author" , line, 0);
146 
147  // video headers
148  video_format = read_line_and_int(pb, &error);
149  if (video_format) {
150  vst = avformat_new_stream(s, NULL);
151  if (!vst)
152  return AVERROR(ENOMEM);
154  vst->codecpar->codec_tag = video_format;
155  vst->codecpar->width = read_line_and_int(pb, &error); // video width
156  vst->codecpar->height = read_line_and_int(pb, &error); // video height
157  vst->codecpar->bits_per_coded_sample = read_line_and_int(pb, &error); // video bits per sample
158 
159  // Figure out the video codec
160  switch (vst->codecpar->codec_tag) {
161 #if 0
162  case 122:
163  vst->codecpar->codec_id = AV_CODEC_ID_ESCAPE122;
164  break;
165 #endif
166  case 124:
168  // The header is wrong here, at least sometimes
169  vst->codecpar->bits_per_coded_sample = 16;
170  break;
171  case 130:
173  break;
174  default:
175  avpriv_report_missing_feature(s, "Video format %s",
178  }
179  } else {
180  for (i = 0; i < 3; i++)
181  error |= read_line(pb, line, sizeof(line));
182  }
183 
184  error |= read_line(pb, line, sizeof(line)); // video frames per second
185  fps = read_fps(line, &error);
186  if (vst)
187  avpriv_set_pts_info(vst, 32, fps.den, fps.num);
188 
189  // Audio headers
190 
191  // ARMovie supports multiple audio tracks; I don't have any
192  // samples, though. This code will ignore additional tracks.
193  error |= read_line(pb, line, sizeof(line));
194  audio_format = read_int(line, &endptr, &error); // audio format ID
195  av_strlcpy(audio_codec, endptr, RPL_LINE_LENGTH);
196  if (audio_format) {
197  int channels;
198  ast = avformat_new_stream(s, NULL);
199  if (!ast)
200  return AVERROR(ENOMEM);
201  ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
202  ast->codecpar->codec_tag = audio_format;
203  ast->codecpar->sample_rate = read_line_and_int(pb, &error); // audio bitrate
204  channels = read_line_and_int(pb, &error); // number of audio channels
205  error |= read_line(pb, line, sizeof(line));
206  ast->codecpar->bits_per_coded_sample = read_int(line, &endptr, &error); // audio bits per sample
207  av_strlcpy(audio_type, endptr, RPL_LINE_LENGTH);
208  ast->codecpar->ch_layout.nb_channels = channels;
209  // At least one sample uses 0 for ADPCM, which is really 4 bits
210  // per sample.
211  if (ast->codecpar->bits_per_coded_sample == 0)
212  ast->codecpar->bits_per_coded_sample = 4;
213 
214  ast->codecpar->bit_rate = ast->codecpar->sample_rate *
215  (int64_t)ast->codecpar->ch_layout.nb_channels;
216  if (ast->codecpar->bit_rate > INT64_MAX / ast->codecpar->bits_per_coded_sample)
217  return AVERROR_INVALIDDATA;
218  ast->codecpar->bit_rate *= ast->codecpar->bits_per_coded_sample;
219 
220  ast->codecpar->codec_id = AV_CODEC_ID_NONE;
221  switch (audio_format) {
222  case 1:
223  if (ast->codecpar->bits_per_coded_sample == 16) {
224  // 16-bit audio is always signed
225  ast->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
226  } else if (ast->codecpar->bits_per_coded_sample == 8) {
227  if (av_stristr(audio_type, "unsigned") != NULL)
228  ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
229  else if (av_stristr(audio_type, "linear") != NULL)
230  ast->codecpar->codec_id = AV_CODEC_ID_PCM_S8;
231  else
232  ast->codecpar->codec_id = AV_CODEC_ID_PCM_VIDC;
233  }
234  // There are some other formats listed as legal per the spec;
235  // samples needed.
236  break;
237  case 2:
238  if (av_stristr(audio_codec, "adpcm") != NULL) {
239  ast->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_ACORN;
240  }
241  break;
242  case 101:
243  if (ast->codecpar->bits_per_coded_sample == 8) {
244  // The samples with this kind of audio that I have
245  // are all unsigned.
246  ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
247  } else if (ast->codecpar->bits_per_coded_sample == 4) {
248  ast->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_EA_SEAD;
249  }
250  break;
251  }
252  if (ast->codecpar->codec_id == AV_CODEC_ID_NONE)
253  avpriv_request_sample(s, "Audio format %"PRId32" (%s)",
254  audio_format, audio_codec);
255  avpriv_set_pts_info(ast, 32, 1, ast->codecpar->bit_rate);
256  } else {
257  for (i = 0; i < 3; i++)
258  error |= read_line(pb, line, sizeof(line));
259  }
260 
261  if (s->nb_streams == 0)
262  return AVERROR_INVALIDDATA;
263 
264  rpl->frames_per_chunk = read_line_and_int(pb, &error); // video frames per chunk
265  if (vst && rpl->frames_per_chunk > 1 && vst->codecpar->codec_tag != 124)
267  "Don't know how to split frames for video format %s. "
268  "Video stream will be broken!\n", av_fourcc2str(vst->codecpar->codec_tag));
269 
270  number_of_chunks = read_line_and_int(pb, &error); // number of chunks in the file
271  // The number in the header is actually the index of the last chunk.
272  number_of_chunks++;
273 
274  error |= read_line(pb, line, sizeof(line)); // "even" chunk size in bytes
275  error |= read_line(pb, line, sizeof(line)); // "odd" chunk size in bytes
276  chunk_catalog_offset = // offset of the "chunk catalog"
277  read_line_and_int(pb, &error); // (file index)
278  error |= read_line(pb, line, sizeof(line)); // offset to "helpful" sprite
279  error |= read_line(pb, line, sizeof(line)); // size of "helpful" sprite
280  if (vst) {
281  error |= read_line(pb, line, sizeof(line)); // offset to key frame list
282  vst->duration = number_of_chunks * (int64_t)rpl->frames_per_chunk;
283  }
284 
285  // Read the index
286  avio_seek(pb, chunk_catalog_offset, SEEK_SET);
287  total_audio_size = 0;
288  for (i = 0; !error && i < number_of_chunks; i++) {
289  int64_t offset, video_size, audio_size;
290  error |= read_line(pb, line, sizeof(line));
291  if (3 != sscanf(line, "%"SCNd64" , %"SCNd64" ; %"SCNd64,
292  &offset, &video_size, &audio_size)) {
293  error = -1;
294  continue;
295  }
296  if (vst)
298  video_size, rpl->frames_per_chunk, 0);
299  if (ast)
300  av_add_index_entry(ast, offset + video_size, total_audio_size,
301  audio_size, audio_size * 8, 0);
302  total_audio_size += audio_size * 8;
303  }
304 
305  if (error)
306  return AVERROR(EIO);
307 
308  return 0;
309 }
310 
312 {
313  RPLContext *rpl = s->priv_data;
314  AVIOContext *pb = s->pb;
315  AVStream* stream;
316  FFStream *sti;
317  AVIndexEntry* index_entry;
318  int ret;
319 
320  if (rpl->chunk_part == s->nb_streams) {
321  rpl->chunk_number++;
322  rpl->chunk_part = 0;
323  }
324 
325  stream = s->streams[rpl->chunk_part];
326  sti = ffstream(stream);
327 
328  if (rpl->chunk_number >= sti->nb_index_entries)
329  return AVERROR_EOF;
330 
331  index_entry = &sti->index_entries[rpl->chunk_number];
332 
333  if (rpl->frame_in_part == 0) {
334  if (avio_seek(pb, index_entry->pos, SEEK_SET) < 0)
335  return AVERROR(EIO);
336  }
337 
338  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
339  stream->codecpar->codec_tag == 124) {
340  // We have to split Escape 124 frames because there are
341  // multiple frames per chunk in Escape 124 samples.
342  uint32_t frame_size;
343 
344  avio_skip(pb, 4); /* flags */
345  frame_size = avio_rl32(pb);
346  if (avio_feof(pb) || avio_seek(pb, -8, SEEK_CUR) < 0 || !frame_size)
347  return AVERROR(EIO);
348 
350  if (ret < 0)
351  return ret;
352  if (ret != frame_size)
353  return AVERROR(EIO);
354 
355  pkt->duration = 1;
356  pkt->pts = index_entry->timestamp + rpl->frame_in_part;
357  pkt->stream_index = rpl->chunk_part;
358 
359  rpl->frame_in_part++;
360  if (rpl->frame_in_part == rpl->frames_per_chunk) {
361  rpl->frame_in_part = 0;
362  rpl->chunk_part++;
363  }
364  } else {
365  ret = av_get_packet(pb, pkt, index_entry->size);
366  if (ret < 0)
367  return ret;
368  if (ret != index_entry->size)
369  return AVERROR(EIO);
370 
371  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
372  // frames_per_chunk should always be one here; the header
373  // parsing will warn if it isn't.
374  pkt->duration = rpl->frames_per_chunk;
375  } else {
376  // All the audio codecs supported in this container
377  // (at least so far) are constant-bitrate.
378  pkt->duration = ret * 8;
379  }
380  pkt->pts = index_entry->timestamp;
381  pkt->stream_index = rpl->chunk_part;
382  rpl->chunk_part++;
383  }
384 
385  // None of the Escape formats have keyframes, and the ADPCM
386  // format used doesn't have keyframes.
387  if (rpl->chunk_number == 0 && rpl->frame_in_part == 0)
389 
390  return ret;
391 }
392 
394  .name = "rpl",
395  .long_name = NULL_IF_CONFIG_SMALL("RPL / ARMovie"),
396  .priv_data_size = sizeof(RPLContext),
400 };
error
static void error(const char *err)
Definition: target_bsf_fuzzer.c:31
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:326
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
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
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: options.c:237
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:58
RPLContext::chunk_number
uint32_t chunk_number
Definition: rpl.c:49
AV_CODEC_ID_ESCAPE130
@ AV_CODEC_ID_ESCAPE130
Definition: codec_id.h:222
RPLContext
Definition: rpl.c:44
av_stristr
char * av_stristr(const char *s1, const char *s2)
Locate the first case-independent occurrence in the string haystack of the string needle.
Definition: avstring.c:59
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
RPL_SIGNATURE_SIZE
#define RPL_SIGNATURE_SIZE
Definition: rpl.c:31
b
#define b
Definition: input.c:41
RPLContext::chunk_part
uint32_t chunk_part
Definition: rpl.c:50
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:392
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:66
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:429
AVIndexEntry
Definition: avformat.h:807
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:465
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:763
RPL_LINE_LENGTH
#define RPL_LINE_LENGTH
256 is arbitrary, but should be big enough for any reasonable file.
Definition: rpl.c:34
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:413
av_add_index_entry
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: seek.c:120
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:998
av_reduce
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
AVRational::num
int num
Numerator.
Definition: rational.h:59
AV_CODEC_ID_PCM_S8
@ AV_CODEC_ID_PCM_S8
Definition: codec_id.h:330
pkt
AVPacket * pkt
Definition: movenc.c:59
AVInputFormat
Definition: avformat.h:656
read_int
static int32_t read_int(const char *line, const char **endptr, int *error)
Definition: rpl.c:71
AV_CODEC_ID_ADPCM_IMA_ACORN
@ AV_CODEC_ID_ADPCM_IMA_ACORN
Definition: codec_id.h:415
read_line
static int read_line(AVIOContext *pb, char *line, int bufsize)
Definition: rpl.c:54
s
#define s(width, name)
Definition: cbs_vp9.c:256
read_fps
static AVRational read_fps(const char *line, int *error)
Parsing for fps, which can be a fraction.
Definition: rpl.c:95
AV_CODEC_ID_ADPCM_IMA_EA_SEAD
@ AV_CODEC_ID_ADPCM_IMA_EA_SEAD
Definition: codec_id.h:388
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:455
frame_size
int frame_size
Definition: mxfenc.c:2202
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:128
AVIndexEntry::size
int size
Definition: avformat.h:818
AVIndexEntry::timestamp
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:809
channels
channels
Definition: aptx.h:31
if
if(ret)
Definition: filter_design.txt:179
AVFormatContext
Format I/O context.
Definition: avformat.h:1216
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:540
result
and forward the result(frame or status change) to the corresponding input. If nothing is possible
NULL
#define NULL
Definition: coverity.c:32
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
FFStream::nb_index_entries
int nb_index_entries
Definition: internal.h:253
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:453
rpl_read_header
static int rpl_read_header(AVFormatContext *s)
Definition: rpl.c:115
AV_CODEC_ID_PCM_VIDC
@ AV_CODEC_ID_PCM_VIDC
Definition: codec_id.h:361
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:761
AVIOContext
Bytestream IO Context.
Definition: avio.h:166
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:115
FFStream
Definition: internal.h:196
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:634
RPL_SIGNATURE
#define RPL_SIGNATURE
Definition: rpl.c:30
offset
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 offset
Definition: writing_filters.txt:86
line
Definition: graph2dot.c:48
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:380
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
rpl_probe
static int rpl_probe(const AVProbeData *p)
Definition: rpl.c:36
AVCodecParameters::height
int height
Definition: codec_par.h:129
ff_rpl_demuxer
const AVInputFormat ff_rpl_demuxer
Definition: rpl.c:393
av_get_packet
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:102
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:948
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:262
avformat.h
dict.h
AV_CODEC_ID_ESCAPE124
@ AV_CODEC_ID_ESCAPE124
Definition: codec_id.h:167
read_line_and_int
static int32_t read_line_and_int(AVIOContext *pb, int *error)
Definition: rpl.c:83
AVRational::den
int den
Denominator.
Definition: rational.h:60
AVIndexEntry::pos
int64_t pos
Definition: avformat.h:808
AVPacket::stream_index
int stream_index
Definition: packet.h:376
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:349
FFStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: internal.h:251
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:104
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:331
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
RPLContext::frame_in_part
uint32_t frame_in_part
Definition: rpl.c:51
rpl_read_packet
static int rpl_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rpl.c:311
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:62
AVPacket
This structure stores compressed data.
Definition: packet.h:351
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:86
int32_t
int32_t
Definition: audioconvert.c:56
av_strlcpy
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:86
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
avstring.h
line
The official guide to swscale for confused that consecutive non overlapping rectangles of slice_bottom special converter These generally are unscaled converters of common like for each output line the vertical scaler pulls lines from a ring buffer When the ring buffer does not contain the wanted line
Definition: swscale.txt:40
RPLContext::frames_per_chunk
int32_t frames_per_chunk
Definition: rpl.c:46
av_fourcc2str
#define av_fourcc2str(fourcc)
Definition: avutil.h:354
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:377