FFmpeg  4.3
mlvdec.c
Go to the documentation of this file.
1 /*
2  * Magic Lantern Video (MLV) demuxer
3  * Copyright (c) 2014 Peter Ross
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 /**
23  * @file
24  * Magic Lantern Video (MLV) demuxer
25  */
26 
27 #include "libavutil/eval.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/rational.h"
31 #include "avformat.h"
32 #include "avio_internal.h"
33 #include "internal.h"
34 #include "riff.h"
35 
36 #define MLV_VERSION "v2.0"
37 
38 #define MLV_VIDEO_CLASS_RAW 1
39 #define MLV_VIDEO_CLASS_YUV 2
40 #define MLV_VIDEO_CLASS_JPEG 3
41 #define MLV_VIDEO_CLASS_H264 4
42 
43 #define MLV_AUDIO_CLASS_WAV 1
44 
45 #define MLV_CLASS_FLAG_DELTA 0x40
46 #define MLV_CLASS_FLAG_LZMA 0x80
47 
48 typedef struct {
49  AVIOContext *pb[101];
50  int class[2];
52  uint64_t pts;
53 } MlvContext;
54 
55 static int probe(const AVProbeData *p)
56 {
57  if (AV_RL32(p->buf) == MKTAG('M','L','V','I') &&
58  AV_RL32(p->buf + 4) >= 52 &&
59  !memcmp(p->buf + 8, MLV_VERSION, 5))
60  return AVPROBE_SCORE_MAX;
61  return 0;
62 }
63 
64 static int check_file_header(AVIOContext *pb, uint64_t guid)
65 {
66  unsigned int size;
67  uint8_t version[8];
68 
69  avio_skip(pb, 4);
70  size = avio_rl32(pb);
71  if (size < 52)
72  return AVERROR_INVALIDDATA;
73  avio_read(pb, version, 8);
74  if (memcmp(version, MLV_VERSION, 5) || avio_rl64(pb) != guid)
75  return AVERROR_INVALIDDATA;
76  avio_skip(pb, size - 24);
77  return 0;
78 }
79 
80 static void read_string(AVFormatContext *avctx, AVIOContext *pb, const char *tag, unsigned size)
81 {
82  char * value = av_malloc(size + 1);
83  if (!value) {
84  avio_skip(pb, size);
85  return;
86  }
87 
88  avio_read(pb, value, size);
89  if (!value[0]) {
90  av_free(value);
91  return;
92  }
93 
94  value[size] = 0;
96 }
97 
98 static void read_uint8(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
99 {
100  av_dict_set_int(&avctx->metadata, tag, avio_r8(pb), 0);
101 }
102 
103 static void read_uint16(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
104 {
105  av_dict_set_int(&avctx->metadata, tag, avio_rl16(pb), 0);
106 }
107 
108 static void read_uint32(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
109 {
110  av_dict_set_int(&avctx->metadata, tag, avio_rl32(pb), 0);
111 }
112 
113 static void read_uint64(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
114 {
115  av_dict_set_int(&avctx->metadata, tag, avio_rl64(pb), 0);
116 }
117 
118 static int scan_file(AVFormatContext *avctx, AVStream *vst, AVStream *ast, int file)
119 {
120  MlvContext *mlv = avctx->priv_data;
121  AVIOContext *pb = mlv->pb[file];
122  int ret;
123  while (!avio_feof(pb)) {
124  int type;
125  unsigned int size;
126  type = avio_rl32(pb);
127  size = avio_rl32(pb);
128  avio_skip(pb, 8); //timestamp
129  if (size < 16)
130  break;
131  size -= 16;
132  if (vst && type == MKTAG('R','A','W','I') && size >= 164) {
133  vst->codecpar->width = avio_rl16(pb);
134  vst->codecpar->height = avio_rl16(pb);
135  ret = av_image_check_size(vst->codecpar->width, vst->codecpar->height, 0, avctx);
136  if (ret < 0)
137  return ret;
138  if (avio_rl32(pb) != 1)
139  avpriv_request_sample(avctx, "raw api version");
140  avio_skip(pb, 20); // pointer, width, height, pitch, frame_size
142  if (vst->codecpar->bits_per_coded_sample < 0 ||
143  vst->codecpar->bits_per_coded_sample > (INT_MAX - 7) / (vst->codecpar->width * vst->codecpar->height)) {
144  av_log(avctx, AV_LOG_ERROR,
145  "invalid bits_per_coded_sample %d (size: %dx%d)\n",
147  vst->codecpar->width, vst->codecpar->height);
148  return AVERROR_INVALIDDATA;
149  }
150  avio_skip(pb, 8 + 16 + 24); // black_level, white_level, xywh, active_area, exposure_bias
151  if (avio_rl32(pb) != 0x2010100) /* RGGB */
152  avpriv_request_sample(avctx, "cfa_pattern");
153  avio_skip(pb, 80); // calibration_illuminant1, color_matrix1, dynamic_range
155  vst->codecpar->codec_tag = MKTAG('B', 'I', 'T', 16);
156  size -= 164;
157  } else if (ast && type == MKTAG('W', 'A', 'V', 'I') && size >= 16) {
158  ret = ff_get_wav_header(avctx, pb, ast->codecpar, 16, 0);
159  if (ret < 0)
160  return ret;
161  size -= 16;
162  } else if (type == MKTAG('I','N','F','O')) {
163  if (size > 0)
164  read_string(avctx, pb, "info", size);
165  continue;
166  } else if (type == MKTAG('I','D','N','T') && size >= 36) {
167  read_string(avctx, pb, "cameraName", 32);
168  read_uint32(avctx, pb, "cameraModel", "0x%"PRIx32);
169  size -= 36;
170  if (size >= 32) {
171  read_string(avctx, pb, "cameraSerial", 32);
172  size -= 32;
173  }
174  } else if (type == MKTAG('L','E','N','S') && size >= 48) {
175  read_uint16(avctx, pb, "focalLength", "%i");
176  read_uint16(avctx, pb, "focalDist", "%i");
177  read_uint16(avctx, pb, "aperture", "%i");
178  read_uint8(avctx, pb, "stabilizerMode", "%i");
179  read_uint8(avctx, pb, "autofocusMode", "%i");
180  read_uint32(avctx, pb, "flags", "0x%"PRIx32);
181  read_uint32(avctx, pb, "lensID", "%"PRIi32);
182  read_string(avctx, pb, "lensName", 32);
183  size -= 48;
184  if (size >= 32) {
185  read_string(avctx, pb, "lensSerial", 32);
186  size -= 32;
187  }
188  } else if (vst && type == MKTAG('V', 'I', 'D', 'F') && size >= 4) {
189  uint64_t pts = avio_rl32(pb);
191  avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
192  size -= 4;
193  } else if (ast && type == MKTAG('A', 'U', 'D', 'F') && size >= 4) {
194  uint64_t pts = avio_rl32(pb);
196  avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
197  size -= 4;
198  } else if (vst && type == MKTAG('W','B','A','L') && size >= 28) {
199  read_uint32(avctx, pb, "wb_mode", "%"PRIi32);
200  read_uint32(avctx, pb, "kelvin", "%"PRIi32);
201  read_uint32(avctx, pb, "wbgain_r", "%"PRIi32);
202  read_uint32(avctx, pb, "wbgain_g", "%"PRIi32);
203  read_uint32(avctx, pb, "wbgain_b", "%"PRIi32);
204  read_uint32(avctx, pb, "wbs_gm", "%"PRIi32);
205  read_uint32(avctx, pb, "wbs_ba", "%"PRIi32);
206  size -= 28;
207  } else if (type == MKTAG('R','T','C','I') && size >= 20) {
208  char str[32];
209  struct tm time = { 0 };
210  time.tm_sec = avio_rl16(pb);
211  time.tm_min = avio_rl16(pb);
212  time.tm_hour = avio_rl16(pb);
213  time.tm_mday = avio_rl16(pb);
214  time.tm_mon = avio_rl16(pb);
215  time.tm_year = avio_rl16(pb);
216  time.tm_wday = avio_rl16(pb);
217  time.tm_yday = avio_rl16(pb);
218  time.tm_isdst = avio_rl16(pb);
219  avio_skip(pb, 2);
220  if (strftime(str, sizeof(str), "%Y-%m-%d %H:%M:%S", &time))
221  av_dict_set(&avctx->metadata, "time", str, 0);
222  size -= 20;
223  } else if (type == MKTAG('E','X','P','O') && size >= 16) {
224  av_dict_set(&avctx->metadata, "isoMode", avio_rl32(pb) ? "auto" : "manual", 0);
225  read_uint32(avctx, pb, "isoValue", "%"PRIi32);
226  read_uint32(avctx, pb, "isoAnalog", "%"PRIi32);
227  read_uint32(avctx, pb, "digitalGain", "%"PRIi32);
228  size -= 16;
229  if (size >= 8) {
230  read_uint64(avctx, pb, "shutterValue", "%"PRIi64);
231  size -= 8;
232  }
233  } else if (type == MKTAG('S','T','Y','L') && size >= 36) {
234  read_uint32(avctx, pb, "picStyleId", "%"PRIi32);
235  read_uint32(avctx, pb, "contrast", "%"PRIi32);
236  read_uint32(avctx, pb, "sharpness", "%"PRIi32);
237  read_uint32(avctx, pb, "saturation", "%"PRIi32);
238  read_uint32(avctx, pb, "colortone", "%"PRIi32);
239  read_string(avctx, pb, "picStyleName", 16);
240  size -= 36;
241  } else if (type == MKTAG('M','A','R','K')) {
242  } else if (type == MKTAG('N','U','L','L')) {
243  } else if (type == MKTAG('M','L','V','I')) { /* occurs when MLV and Mnn files are concatenated */
244  } else {
245  av_log(avctx, AV_LOG_INFO, "unsupported tag %s, size %u\n",
247  }
248  avio_skip(pb, size);
249  }
250  return 0;
251 }
252 
253 static int read_header(AVFormatContext *avctx)
254 {
255  MlvContext *mlv = avctx->priv_data;
256  AVIOContext *pb = avctx->pb;
257  AVStream *vst = NULL, *ast = NULL;
258  int size, ret;
259  unsigned nb_video_frames, nb_audio_frames;
260  uint64_t guid;
261  char guidstr[32];
262 
263  avio_skip(pb, 4);
264  size = avio_rl32(pb);
265  if (size < 52)
266  return AVERROR_INVALIDDATA;
267 
268  avio_skip(pb, 8);
269 
270  guid = avio_rl64(pb);
271  snprintf(guidstr, sizeof(guidstr), "0x%"PRIx64, guid);
272  av_dict_set(&avctx->metadata, "guid", guidstr, 0);
273 
274  avio_skip(pb, 8); //fileNum, fileCount, fileFlags
275 
276  mlv->class[0] = avio_rl16(pb);
277  mlv->class[1] = avio_rl16(pb);
278 
279  nb_video_frames = avio_rl32(pb);
280  nb_audio_frames = avio_rl32(pb);
281 
282  if (nb_video_frames && mlv->class[0]) {
283  vst = avformat_new_stream(avctx, NULL);
284  if (!vst)
285  return AVERROR(ENOMEM);
286  vst->id = 0;
287  vst->nb_frames = nb_video_frames;
289  avpriv_request_sample(avctx, "compression");
291  switch (mlv->class[0] & ~(MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)) {
292  case MLV_VIDEO_CLASS_RAW:
294  break;
295  case MLV_VIDEO_CLASS_YUV:
298  vst->codecpar->codec_tag = 0;
299  break;
302  vst->codecpar->codec_tag = 0;
303  break;
306  vst->codecpar->codec_tag = 0;
307  break;
308  default:
309  avpriv_request_sample(avctx, "unknown video class");
310  }
311  }
312 
313  if (nb_audio_frames && mlv->class[1]) {
314  ast = avformat_new_stream(avctx, NULL);
315  if (!ast)
316  return AVERROR(ENOMEM);
317  ast->id = 1;
318  ast->nb_frames = nb_audio_frames;
319  if ((mlv->class[1] & MLV_CLASS_FLAG_LZMA))
320  avpriv_request_sample(avctx, "compression");
321  if ((mlv->class[1] & ~MLV_CLASS_FLAG_LZMA) != MLV_AUDIO_CLASS_WAV)
322  avpriv_request_sample(avctx, "unknown audio class");
323 
324  ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
325  avpriv_set_pts_info(ast, 33, 1, ast->codecpar->sample_rate);
326  }
327 
328  if (vst) {
330  framerate.num = avio_rl32(pb);
331  framerate.den = avio_rl32(pb);
332  avpriv_set_pts_info(vst, 64, framerate.den, framerate.num);
333  } else
334  avio_skip(pb, 8);
335 
336  avio_skip(pb, size - 52);
337 
338  /* scan primary file */
339  mlv->pb[100] = avctx->pb;
340  ret = scan_file(avctx, vst, ast, 100);
341  if (ret < 0)
342  return ret;
343 
344  /* scan secondary files */
345  if (strlen(avctx->url) > 2) {
346  int i;
347  char *filename = av_strdup(avctx->url);
348 
349  if (!filename)
350  return AVERROR(ENOMEM);
351 
352  for (i = 0; i < 100; i++) {
353  snprintf(filename + strlen(filename) - 2, 3, "%02d", i);
354  if (avctx->io_open(avctx, &mlv->pb[i], filename, AVIO_FLAG_READ, NULL) < 0)
355  break;
356  if (check_file_header(mlv->pb[i], guid) < 0) {
357  av_log(avctx, AV_LOG_WARNING, "ignoring %s; bad format or guid mismatch\n", filename);
358  ff_format_io_close(avctx, &mlv->pb[i]);
359  continue;
360  }
361  av_log(avctx, AV_LOG_INFO, "scanning %s\n", filename);
362  ret = scan_file(avctx, vst, ast, i);
363  if (ret < 0) {
364  av_log(avctx, AV_LOG_WARNING, "ignoring %s; %s\n", filename, av_err2str(ret));
365  ff_format_io_close(avctx, &mlv->pb[i]);
366  continue;
367  }
368  }
369  av_free(filename);
370  }
371 
372  if (vst)
373  vst->duration = vst->nb_index_entries;
374  if (ast)
375  ast->duration = ast->nb_index_entries;
376 
377  if ((vst && !vst->nb_index_entries) || (ast && !ast->nb_index_entries)) {
378  av_log(avctx, AV_LOG_ERROR, "no index entries found\n");
379  return AVERROR_INVALIDDATA;
380  }
381 
382  if (vst && ast)
383  avio_seek(pb, FFMIN(vst->index_entries[0].pos, ast->index_entries[0].pos), SEEK_SET);
384  else if (vst)
385  avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
386  else if (ast)
387  avio_seek(pb, ast->index_entries[0].pos, SEEK_SET);
388 
389  return 0;
390 }
391 
393 {
394  MlvContext *mlv = avctx->priv_data;
395  AVIOContext *pb;
396  AVStream *st;
397  int index, ret;
398  unsigned int size, space;
399 
400  if (!avctx->nb_streams)
401  return AVERROR_EOF;
402 
403  st = avctx->streams[mlv->stream_index];
404  if (mlv->pts >= st->duration)
405  return AVERROR_EOF;
406 
408  if (index < 0) {
409  av_log(avctx, AV_LOG_ERROR, "could not find index entry for frame %"PRId64"\n", mlv->pts);
410  return AVERROR(EIO);
411  }
412 
413  pb = mlv->pb[st->index_entries[index].size];
414  avio_seek(pb, st->index_entries[index].pos, SEEK_SET);
415 
416  avio_skip(pb, 4); // blockType
417  size = avio_rl32(pb);
418  if (size < 16)
419  return AVERROR_INVALIDDATA;
420  avio_skip(pb, 12); //timestamp, frameNumber
422  avio_skip(pb, 8); // cropPosX, cropPosY, panPosX, panPosY
423  space = avio_rl32(pb);
424  avio_skip(pb, space);
425 
426  if ((mlv->class[st->id] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA))) {
428  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
429  ret = av_get_packet(pb, pkt, (st->codecpar->width * st->codecpar->height * st->codecpar->bits_per_coded_sample + 7) >> 3);
430  } else { // AVMEDIA_TYPE_AUDIO
431  if (space > UINT_MAX - 24 || size < (24 + space))
432  return AVERROR_INVALIDDATA;
433  ret = av_get_packet(pb, pkt, size - (24 + space));
434  }
435 
436  if (ret < 0)
437  return ret;
438 
439  pkt->stream_index = mlv->stream_index;
440  pkt->pts = mlv->pts;
441 
442  mlv->stream_index++;
443  if (mlv->stream_index == avctx->nb_streams) {
444  mlv->stream_index = 0;
445  mlv->pts++;
446  }
447  return 0;
448 }
449 
450 static int read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
451 {
452  MlvContext *mlv = avctx->priv_data;
453 
455  return AVERROR(ENOSYS);
456 
457  if (!(avctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
458  return AVERROR(EIO);
459 
460  mlv->pts = timestamp;
461  return 0;
462 }
463 
465 {
466  MlvContext *mlv = s->priv_data;
467  int i;
468  for (i = 0; i < 100; i++)
469  ff_format_io_close(s, &mlv->pb[i]);
470  return 0;
471 }
472 
474  .name = "mlv",
475  .long_name = NULL_IF_CONFIG_SMALL("Magic Lantern Video (MLV)"),
476  .priv_data_size = sizeof(MlvContext),
477  .read_probe = probe,
481  .read_seek = read_seek,
482 };
AVStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1094
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
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: utils.c:4519
MLV_VIDEO_CLASS_RAW
#define MLV_VIDEO_CLASS_RAW
Definition: mlvdec.c:38
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
space
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated space
Definition: undefined.txt:4
MLV_AUDIO_CLASS_WAV
#define MLV_AUDIO_CLASS_WAV
Definition: mlvdec.c:43
AVSEEK_FLAG_FRAME
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:2499
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:406
rational.h
AV_CODEC_ID_RAWVIDEO
@ AV_CODEC_ID_RAWVIDEO
Definition: codec_id.h:62
MlvContext::stream_index
int stream_index
Definition: mlvdec.c:51
read_uint64
static void read_uint64(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
Definition: mlvdec.c:113
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1403
ff_add_index_entry
int ff_add_index_entry(AVIndexEntry **index_entries, int *nb_index_entries, unsigned int *index_entries_allocated_size, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Internal version of av_add_index_entry.
Definition: utils.c:1986
read_string
static void read_string(AVFormatContext *avctx, AVIOContext *pb, const char *tag, unsigned size)
Definition: mlvdec.c:80
AVSEEK_FLAG_BYTE
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2497
read_uint32
static void read_uint32(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
Definition: mlvdec.c:108
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
scan_file
static int scan_file(AVFormatContext *avctx, AVStream *vst, AVStream *ast, int file)
Definition: mlvdec.c:118
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:803
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
framerate
int framerate
Definition: h264_levels.c:65
MlvContext
Definition: mlvdec.c:48
AVSEEK_FLAG_ANY
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2498
ff_mlv_demuxer
AVInputFormat ff_mlv_demuxer
Definition: mlvdec.c:473
AVIOContext::pos
int64_t pos
position in the file of the current buffer
Definition: avio.h:238
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
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
pts
static int64_t pts
Definition: transcode_aac.c:647
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:914
read_header
static int read_header(AVFormatContext *avctx)
Definition: mlvdec.c:253
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
AV_DICT_DONT_STRDUP_VAL
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:74
read_seek
static int read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
Definition: mlvdec.c:450
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVFormatContext::metadata
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1575
AVInputFormat
Definition: avformat.h:636
read_uint16
static void read_uint16(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
Definition: mlvdec.c:103
MLV_VERSION
#define MLV_VERSION
Definition: mlvdec.c:36
read_uint8
static void read_uint8(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
Definition: mlvdec.c:98
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
MlvContext::pb
AVIOContext * pb[101]
Definition: mlvdec.c:49
AV_PIX_FMT_BAYER_RGGB16LE
@ AV_PIX_FMT_BAYER_RGGB16LE
bayer, RGRG..(odd line), GBGB..(even line), 16-bit samples, little-endian
Definition: pixfmt.h:266
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:641
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:126
AVIndexEntry::size
int size
Definition: avformat.h:806
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:76
AVFormatContext
Format I/O context.
Definition: avformat.h:1335
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1012
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
read_close
static int read_close(AVFormatContext *s)
Definition: mlvdec.c:464
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
MLV_VIDEO_CLASS_JPEG
#define MLV_VIDEO_CLASS_JPEG
Definition: mlvdec.c:40
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1377
read_packet
static int read_packet(AVFormatContext *avctx, AVPacket *pkt)
Definition: mlvdec.c:392
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
index
int index
Definition: gxfenc.c:89
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:916
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1391
eval.h
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
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:186
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
AVStream::nb_index_entries
int nb_index_entries
Definition: avformat.h:1096
av_err2str
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4938
AVFormatContext::url
char * url
input or output URL.
Definition: avformat.h:1431
size
int size
Definition: twinvq_data.h:11134
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
MLV_VIDEO_CLASS_YUV
#define MLV_VIDEO_CLASS_YUV
Definition: mlvdec.c:39
version
version
Definition: libkvazaar.c:292
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
AV_CODEC_ID_MJPEG
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:56
check_file_header
static int check_file_header(AVIOContext *pb, uint64_t guid)
Definition: mlvdec.c:64
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:348
avio_internal.h
AVCodecParameters::height
int height
Definition: codec_par.h:127
value
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 default value
Definition: writing_filters.txt:86
uint8_t
uint8_t
Definition: audio_convert.c:194
ff_get_wav_header
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
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:304
MLV_VIDEO_CLASS_H264
#define MLV_VIDEO_CLASS_H264
Definition: mlvdec.c:41
tag
uint32_t tag
Definition: movenc.c:1532
AVStream::id
int id
Format-specific stream ID.
Definition: avformat.h:872
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:865
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
avformat.h
file
FFmpeg Automated Testing Environment ************************************Introduction Using FATE from your FFmpeg source directory Submitting the results to the FFmpeg result aggregation server Uploading new samples to the fate suite FATE makefile targets and variables Makefile targets Makefile variables Examples Introduction **************FATE is an extended regression suite on the client side and a means for results aggregation and presentation on the server side The first part of this document explains how you can use FATE from your FFmpeg source directory to test your ffmpeg binary The second part describes how you can run FATE to submit the results to FFmpeg’s FATE server In any way you can have a look at the publicly viewable FATE results by visiting this as it can be seen if some test on some platform broke with their recent contribution This usually happens on the platforms the developers could not test on The second part of this document describes how you can run FATE to submit your results to FFmpeg’s FATE server If you want to submit your results be sure to check that your combination of OS and compiler is not already listed on the above mentioned website In the third part you can find a comprehensive listing of FATE makefile targets and variables Using FATE from your FFmpeg source directory **********************************************If you want to run FATE on your machine you need to have the samples in place You can get the samples via the build target fate rsync Use this command from the top level source this will cause FATE to fail NOTE To use a custom wrapper to run the pass ‘ target exec’ to ‘configure’ or set the TARGET_EXEC Make variable Submitting the results to the FFmpeg result aggregation server ****************************************************************To submit your results to the server you should run fate through the shell script ‘tests fate sh’ from the FFmpeg sources This script needs to be invoked with a configuration file as its first argument tests fate sh path to fate_config A configuration file template with comments describing the individual configuration variables can be found at ‘doc fate_config sh template’ Create a configuration that suits your based on the configuration template The ‘slot’ configuration variable can be any string that is not yet but it is suggested that you name it adhering to the following pattern ‘ARCH OS COMPILER COMPILER VERSION’ The configuration file itself will be sourced in a shell therefore all shell features may be used This enables you to setup the environment as you need it for your build For your first test runs the ‘fate_recv’ variable should be empty or commented out This will run everything as normal except that it will omit the submission of the results to the server The following files should be present in $workdir as specified in the configuration file
Definition: fate.txt:125
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
AV_RL32
#define AV_RL32
Definition: intreadwrite.h:146
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
AVFormatContext::io_open
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1917
AVIndexEntry::pos
int64_t pos
Definition: avformat.h:796
MLV_CLASS_FLAG_DELTA
#define MLV_CLASS_FLAG_DELTA
Definition: mlvdec.c:45
AVPacket::stream_index
int stream_index
Definition: packet.h:357
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
av_dict_set_int
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it.
Definition: dict.c:147
ff_format_io_close
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5685
AVIO_FLAG_READ
#define AVIO_FLAG_READ
read-only
Definition: avio.h:674
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:255
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:102
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:39
AVCodecParameters::format
int format
Definition: codec_par.h:84
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:332
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
riff.h
avio_rl64
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:755
convert_header.str
string str
Definition: convert_header.py:20
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:564
MLV_CLASS_FLAG_LZMA
#define MLV_CLASS_FLAG_LZMA
Definition: mlvdec.c:46
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
probe
static int probe(const AVProbeData *p)
Definition: mlvdec.c:55
av_image_check_size
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:282
snprintf
#define snprintf
Definition: snprintf.h:34
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1363
MlvContext::class
int class[2]
Definition: mlvdec.c:50
AVStream::index_entries_allocated_size
unsigned int index_entries_allocated_size
Definition: avformat.h:1097
av_fourcc2str
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
av_index_search_timestamp
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:2162
MlvContext::pts
uint64_t pts
Definition: mlvdec.c:52
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356