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xmv.c
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1 /*
2  * Microsoft XMV demuxer
3  * Copyright (c) 2011 Sven Hesse <drmccoy@drmccoy.de>
4  * Copyright (c) 2011 Matthew Hoops <clone2727@gmail.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * Microsoft XMV demuxer
26  */
27 
28 #include <inttypes.h>
29 
30 #include "libavutil/intreadwrite.h"
31 
32 #include "avformat.h"
33 #include "internal.h"
34 #include "riff.h"
35 #include "libavutil/avassert.h"
36 
37 /** The min size of an XMV header. */
38 #define XMV_MIN_HEADER_SIZE 36
39 
40 /** Audio flag: ADPCM'd 5.1 stream, front left / right channels */
41 #define XMV_AUDIO_ADPCM51_FRONTLEFTRIGHT 1
42 /** Audio flag: ADPCM'd 5.1 stream, front center / low frequency channels */
43 #define XMV_AUDIO_ADPCM51_FRONTCENTERLOW 2
44 /** Audio flag: ADPCM'd 5.1 stream, rear left / right channels */
45 #define XMV_AUDIO_ADPCM51_REARLEFTRIGHT 4
46 
47 /** Audio flag: Any of the ADPCM'd 5.1 stream flags. */
48 #define XMV_AUDIO_ADPCM51 (XMV_AUDIO_ADPCM51_FRONTLEFTRIGHT | \
49  XMV_AUDIO_ADPCM51_FRONTCENTERLOW | \
50  XMV_AUDIO_ADPCM51_REARLEFTRIGHT)
51 
52 #define XMV_BLOCK_ALIGN_SIZE 36
53 
54 /** A video packet with an XMV file. */
55 typedef struct XMVVideoPacket {
56  int stream_index; ///< The decoder stream index for this video packet.
57 
58  uint32_t data_size; ///< The size of the remaining video data.
59  uint64_t data_offset; ///< The offset of the video data within the file.
60 
61  uint32_t current_frame; ///< The current frame within this video packet.
62  uint32_t frame_count; ///< The amount of frames within this video packet.
63 
64  int has_extradata; ///< Does the video packet contain extra data?
65  uint8_t extradata[4]; ///< The extra data
66 
67  int64_t last_pts; ///< PTS of the last video frame.
68  int64_t pts; ///< PTS of the most current video frame.
70 
71 /** An audio packet with an XMV file. */
72 typedef struct XMVAudioPacket {
73  int stream_index; ///< The decoder stream index for this audio packet.
74 
75  /* Stream format properties. */
76  uint16_t compression; ///< The type of compression.
77  uint16_t channels; ///< Number of channels.
78  uint32_t sample_rate; ///< Sampling rate.
79  uint16_t bits_per_sample; ///< Bits per compressed sample.
80  uint32_t bit_rate; ///< Bits of compressed data per second.
81  uint16_t flags; ///< Flags
82  unsigned block_align; ///< Bytes per compressed block.
83  uint16_t block_samples; ///< Decompressed samples per compressed block.
84 
85  enum AVCodecID codec_id; ///< The codec ID of the compression scheme.
86 
87  uint32_t data_size; ///< The size of the remaining audio data.
88  uint64_t data_offset; ///< The offset of the audio data within the file.
89 
90  uint32_t frame_size; ///< Number of bytes to put into an audio frame.
91 
92  uint64_t block_count; ///< Running counter of decompressed audio block.
94 
95 /** Context for demuxing an XMV file. */
96 typedef struct XMVDemuxContext {
97  uint16_t audio_track_count; ///< Number of audio track in this file.
98 
99  uint32_t this_packet_size; ///< Size of the current packet.
100  uint32_t next_packet_size; ///< Size of the next packet.
101 
102  uint64_t this_packet_offset; ///< Offset of the current packet.
103  uint64_t next_packet_offset; ///< Offset of the next packet.
104 
105  uint16_t current_stream; ///< The index of the stream currently handling.
106  uint16_t stream_count; ///< The number of streams in this file.
107 
108  XMVVideoPacket video; ///< The video packet contained in each packet.
109  XMVAudioPacket *audio; ///< The audio packets contained in each packet.
111 
112 static int xmv_probe(AVProbeData *p)
113 {
114  uint32_t file_version;
115 
116  if (p->buf_size < XMV_MIN_HEADER_SIZE)
117  return 0;
118 
119  file_version = AV_RL32(p->buf + 16);
120  if ((file_version == 0) || (file_version > 4))
121  return 0;
122 
123  if (!memcmp(p->buf + 12, "xobX", 4))
124  return AVPROBE_SCORE_MAX;
125 
126  return 0;
127 }
128 
130 {
131  XMVDemuxContext *xmv = s->priv_data;
132 
133  av_freep(&xmv->audio);
134 
135  return 0;
136 }
137 
139 {
140  XMVDemuxContext *xmv = s->priv_data;
141  AVIOContext *pb = s->pb;
142  AVStream *vst = NULL;
143 
144  uint32_t file_version;
145  uint32_t this_packet_size;
146  uint16_t audio_track;
147  int ret;
148 
149  avio_skip(pb, 4); /* Next packet size */
150 
151  this_packet_size = avio_rl32(pb);
152 
153  avio_skip(pb, 4); /* Max packet size */
154  avio_skip(pb, 4); /* "xobX" */
155 
156  file_version = avio_rl32(pb);
157  if ((file_version != 4) && (file_version != 2))
158  avpriv_request_sample(s, "Uncommon version %"PRIu32"", file_version);
159 
160 
161  /* Video track */
162 
163  vst = avformat_new_stream(s, NULL);
164  if (!vst)
165  return AVERROR(ENOMEM);
166 
167  avpriv_set_pts_info(vst, 32, 1, 1000);
168 
171  vst->codec->codec_tag = MKBETAG('W', 'M', 'V', '2');
172  vst->codec->width = avio_rl32(pb);
173  vst->codec->height = avio_rl32(pb);
174 
175  vst->duration = avio_rl32(pb);
176 
177  xmv->video.stream_index = vst->index;
178 
179  /* Audio tracks */
180 
181  xmv->audio_track_count = avio_rl16(pb);
182 
183  avio_skip(pb, 2); /* Unknown (padding?) */
184 
186  if (!xmv->audio) {
187  ret = AVERROR(ENOMEM);
188  goto fail;
189  }
190 
191  for (audio_track = 0; audio_track < xmv->audio_track_count; audio_track++) {
192  XMVAudioPacket *packet = &xmv->audio[audio_track];
193  AVStream *ast = NULL;
194 
195  packet->compression = avio_rl16(pb);
196  packet->channels = avio_rl16(pb);
197  packet->sample_rate = avio_rl32(pb);
198  packet->bits_per_sample = avio_rl16(pb);
199  packet->flags = avio_rl16(pb);
200 
201  packet->bit_rate = packet->bits_per_sample *
202  packet->sample_rate *
203  packet->channels;
204  packet->block_align = XMV_BLOCK_ALIGN_SIZE * packet->channels;
205  packet->block_samples = 64;
206  packet->codec_id = ff_wav_codec_get_id(packet->compression,
207  packet->bits_per_sample);
208 
209  packet->stream_index = -1;
210 
211  packet->frame_size = 0;
212  packet->block_count = 0;
213 
214  /* TODO: ADPCM'd 5.1 sound is encoded in three separate streams.
215  * Those need to be interleaved to a proper 5.1 stream. */
216  if (packet->flags & XMV_AUDIO_ADPCM51)
217  av_log(s, AV_LOG_WARNING, "Unsupported 5.1 ADPCM audio stream "
218  "(0x%04X)\n", packet->flags);
219 
220  if (!packet->channels || !packet->sample_rate ||
221  packet->channels >= UINT16_MAX / XMV_BLOCK_ALIGN_SIZE) {
222  av_log(s, AV_LOG_ERROR, "Invalid parameters for audio track %"PRIu16".\n",
223  audio_track);
224  ret = AVERROR_INVALIDDATA;
225  goto fail;
226  }
227 
228  ast = avformat_new_stream(s, NULL);
229  if (!ast) {
230  ret = AVERROR(ENOMEM);
231  goto fail;
232  }
233 
235  ast->codec->codec_id = packet->codec_id;
236  ast->codec->codec_tag = packet->compression;
237  ast->codec->channels = packet->channels;
238  ast->codec->sample_rate = packet->sample_rate;
240  ast->codec->bit_rate = packet->bit_rate;
241  ast->codec->block_align = 36 * packet->channels;
242 
243  avpriv_set_pts_info(ast, 32, packet->block_samples, packet->sample_rate);
244 
245  packet->stream_index = ast->index;
246 
247  ast->duration = vst->duration;
248  }
249 
250 
251  /* Initialize the packet context */
252 
253  xmv->next_packet_offset = avio_tell(pb);
254  xmv->next_packet_size = this_packet_size - xmv->next_packet_offset;
255  xmv->stream_count = xmv->audio_track_count + 1;
256 
257  return 0;
258 
259 fail:
260  xmv_read_close(s);
261  return ret;
262 }
263 
264 static void xmv_read_extradata(uint8_t *extradata, AVIOContext *pb)
265 {
266  /* Read the XMV extradata */
267 
268  uint32_t data = avio_rl32(pb);
269 
270  int mspel_bit = !!(data & 0x01);
271  int loop_filter = !!(data & 0x02);
272  int abt_flag = !!(data & 0x04);
273  int j_type_bit = !!(data & 0x08);
274  int top_left_mv_flag = !!(data & 0x10);
275  int per_mb_rl_bit = !!(data & 0x20);
276  int slice_count = (data >> 6) & 7;
277 
278  /* Write it back as standard WMV2 extradata */
279 
280  data = 0;
281 
282  data |= mspel_bit << 15;
283  data |= loop_filter << 14;
284  data |= abt_flag << 13;
285  data |= j_type_bit << 12;
286  data |= top_left_mv_flag << 11;
287  data |= per_mb_rl_bit << 10;
288  data |= slice_count << 7;
289 
290  AV_WB32(extradata, data);
291 }
292 
294 {
295  XMVDemuxContext *xmv = s->priv_data;
296  AVIOContext *pb = s->pb;
297  int ret;
298 
299  uint8_t data[8];
300  uint16_t audio_track;
301  uint64_t data_offset;
302 
303  /* Next packet size */
304  xmv->next_packet_size = avio_rl32(pb);
305 
306  /* Packet video header */
307 
308  if (avio_read(pb, data, 8) != 8)
309  return AVERROR(EIO);
310 
311  xmv->video.data_size = AV_RL32(data) & 0x007FFFFF;
312 
313  xmv->video.current_frame = 0;
314  xmv->video.frame_count = (AV_RL32(data) >> 23) & 0xFF;
315 
316  xmv->video.has_extradata = (data[3] & 0x80) != 0;
317 
318  /* Adding the audio data sizes and the video data size keeps you 4 bytes
319  * short for every audio track. But as playing around with XMV files with
320  * ADPCM audio showed, taking the extra 4 bytes from the audio data gives
321  * you either completely distorted audio or click (when skipping the
322  * remaining 68 bytes of the ADPCM block). Subtracting 4 bytes for every
323  * audio track from the video data works at least for the audio. Probably
324  * some alignment thing?
325  * The video data has (always?) lots of padding, so it should work out...
326  */
327  xmv->video.data_size -= xmv->audio_track_count * 4;
328 
329  xmv->current_stream = 0;
330  if (!xmv->video.frame_count) {
331  xmv->video.frame_count = 1;
332  xmv->current_stream = xmv->stream_count > 1;
333  }
334 
335  /* Packet audio header */
336 
337  for (audio_track = 0; audio_track < xmv->audio_track_count; audio_track++) {
338  XMVAudioPacket *packet = &xmv->audio[audio_track];
339 
340  if (avio_read(pb, data, 4) != 4)
341  return AVERROR(EIO);
342 
343  packet->data_size = AV_RL32(data) & 0x007FFFFF;
344  if ((packet->data_size == 0) && (audio_track != 0))
345  /* This happens when I create an XMV with several identical audio
346  * streams. From the size calculations, duplicating the previous
347  * stream's size works out, but the track data itself is silent.
348  * Maybe this should also redirect the offset to the previous track?
349  */
350  packet->data_size = xmv->audio[audio_track - 1].data_size;
351 
352  /* Carve up the audio data in frame_count slices */
353  packet->frame_size = packet->data_size / xmv->video.frame_count;
354  packet->frame_size -= packet->frame_size % packet->block_align;
355  }
356 
357  /* Packet data offsets */
358 
359  data_offset = avio_tell(pb);
360 
361  xmv->video.data_offset = data_offset;
362  data_offset += xmv->video.data_size;
363 
364  for (audio_track = 0; audio_track < xmv->audio_track_count; audio_track++) {
365  xmv->audio[audio_track].data_offset = data_offset;
366  data_offset += xmv->audio[audio_track].data_size;
367  }
368 
369  /* Video frames header */
370 
371  /* Read new video extra data */
372  if (xmv->video.data_size > 0) {
373  if (xmv->video.has_extradata) {
375 
376  xmv->video.data_size -= 4;
377  xmv->video.data_offset += 4;
378 
379  if (xmv->video.stream_index >= 0) {
380  AVStream *vst = s->streams[xmv->video.stream_index];
381 
383 
384  if (vst->codec->extradata_size < 4) {
385  av_freep(&vst->codec->extradata);
386 
387  if ((ret = ff_alloc_extradata(vst->codec, 4)) < 0)
388  return ret;
389  }
390 
391  memcpy(vst->codec->extradata, xmv->video.extradata, 4);
392  }
393  }
394  }
395 
396  return 0;
397 }
398 
400 {
401  XMVDemuxContext *xmv = s->priv_data;
402  AVIOContext *pb = s->pb;
403  int result;
404 
405  if (xmv->this_packet_offset == xmv->next_packet_offset)
406  return AVERROR_EOF;
407 
408  /* Seek to it */
410  if (avio_seek(pb, xmv->this_packet_offset, SEEK_SET) != xmv->this_packet_offset)
411  return AVERROR(EIO);
412 
413  /* Update the size */
415  if (xmv->this_packet_size < (12 + xmv->audio_track_count * 4))
416  return AVERROR(EIO);
417 
418  /* Process the header */
419  result = xmv_process_packet_header(s);
420  if (result)
421  return result;
422 
423  /* Update the offset */
425 
426  return 0;
427 }
428 
430  AVPacket *pkt, uint32_t stream)
431 {
432  XMVDemuxContext *xmv = s->priv_data;
433  AVIOContext *pb = s->pb;
434  XMVAudioPacket *audio = &xmv->audio[stream];
435 
436  uint32_t data_size;
437  uint32_t block_count;
438  int result;
439 
440  /* Seek to it */
441  if (avio_seek(pb, audio->data_offset, SEEK_SET) != audio->data_offset)
442  return AVERROR(EIO);
443 
444  if ((xmv->video.current_frame + 1) < xmv->video.frame_count)
445  /* Not the last frame, get at most frame_size bytes. */
446  data_size = FFMIN(audio->frame_size, audio->data_size);
447  else
448  /* Last frame, get the rest. */
449  data_size = audio->data_size;
450 
451  /* Read the packet */
452  result = av_get_packet(pb, pkt, data_size);
453  if (result <= 0)
454  return result;
455 
456  pkt->stream_index = audio->stream_index;
457 
458  /* Calculate the PTS */
459 
460  block_count = data_size / audio->block_align;
461 
462  pkt->duration = block_count;
463  pkt->pts = audio->block_count;
464  pkt->dts = AV_NOPTS_VALUE;
465 
466  audio->block_count += block_count;
467 
468  /* Advance offset */
469  audio->data_size -= data_size;
470  audio->data_offset += data_size;
471 
472  return 0;
473 }
474 
476  AVPacket *pkt)
477 {
478  XMVDemuxContext *xmv = s->priv_data;
479  AVIOContext *pb = s->pb;
480  XMVVideoPacket *video = &xmv->video;
481 
482  int result;
483  uint32_t frame_header;
484  uint32_t frame_size, frame_timestamp;
485  uint8_t *data, *end;
486 
487  /* Seek to it */
488  if (avio_seek(pb, video->data_offset, SEEK_SET) != video->data_offset)
489  return AVERROR(EIO);
490 
491  /* Read the frame header */
492  frame_header = avio_rl32(pb);
493 
494  frame_size = (frame_header & 0x1FFFF) * 4 + 4;
495  frame_timestamp = (frame_header >> 17);
496 
497  if ((frame_size + 4) > video->data_size)
498  return AVERROR(EIO);
499 
500  /* Get the packet data */
501  result = av_get_packet(pb, pkt, frame_size);
502  if (result != frame_size)
503  return result;
504 
505  /* Contrary to normal WMV2 video, the bit stream in XMV's
506  * WMV2 is little-endian.
507  * TODO: This manual swap is of course suboptimal.
508  */
509  for (data = pkt->data, end = pkt->data + frame_size; data < end; data += 4)
510  AV_WB32(data, AV_RL32(data));
511 
512  pkt->stream_index = video->stream_index;
513 
514  /* Calculate the PTS */
515 
516  video->last_pts = frame_timestamp + video->pts;
517 
518  pkt->duration = 0;
519  pkt->pts = video->last_pts;
520  pkt->dts = AV_NOPTS_VALUE;
521 
522  video->pts += frame_timestamp;
523 
524  /* Keyframe? */
525  pkt->flags = (pkt->data[0] & 0x80) ? 0 : AV_PKT_FLAG_KEY;
526 
527  /* Advance offset */
528  video->data_size -= frame_size + 4;
529  video->data_offset += frame_size + 4;
530 
531  return 0;
532 }
533 
535  AVPacket *pkt)
536 {
537  XMVDemuxContext *xmv = s->priv_data;
538  int result;
539 
540  if (xmv->video.current_frame == xmv->video.frame_count) {
541  /* No frames left in this packet, so we fetch a new one */
542 
543  result = xmv_fetch_new_packet(s);
544  if (result)
545  return result;
546  }
547 
548  if (xmv->current_stream == 0) {
549  /* Fetch a video frame */
550 
551  result = xmv_fetch_video_packet(s, pkt);
552  } else {
553  /* Fetch an audio frame */
554 
555  result = xmv_fetch_audio_packet(s, pkt, xmv->current_stream - 1);
556  }
557  if (result) {
558  xmv->current_stream = 0;
559  xmv->video.current_frame = xmv->video.frame_count;
560  return result;
561  }
562 
563 
564  /* Increase our counters */
565  if (++xmv->current_stream >= xmv->stream_count) {
566  xmv->current_stream = 0;
567  xmv->video.current_frame += 1;
568  }
569 
570  return 0;
571 }
572 
574  .name = "xmv",
575  .long_name = NULL_IF_CONFIG_SMALL("Microsoft XMV"),
576  .extensions = "xmv",
577  .priv_data_size = sizeof(XMVDemuxContext),
582 };
uint32_t next_packet_size
Size of the next packet.
Definition: xmv.c:100
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
uint16_t compression
The type of compression.
Definition: xmv.c:76
XMVAudioPacket * audio
The audio packets contained in each packet.
Definition: xmv.c:109
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1597
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:4149
XMVVideoPacket video
The video packet contained in each packet.
Definition: xmv.c:108
int index
stream index in AVFormatContext
Definition: avformat.h:878
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:208
uint64_t data_offset
The offset of the audio data within the file.
Definition: xmv.c:88
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:282
static int xmv_fetch_new_packet(AVFormatContext *s)
Definition: xmv.c:399
static void xmv_read_extradata(uint8_t *extradata, AVIOContext *pb)
Definition: xmv.c:264
static AVPacket pkt
static int xmv_probe(AVProbeData *p)
Definition: xmv.c:112
static int xmv_fetch_video_packet(AVFormatContext *s, AVPacket *pkt)
Definition: xmv.c:475
uint32_t data_size
The size of the remaining audio data.
Definition: xmv.c:87
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2324
static int xmv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: xmv.c:534
uint32_t data_size
The size of the remaining video data.
Definition: xmv.c:58
Format I/O context.
Definition: avformat.h:1314
uint16_t stream_count
The number of streams in this file.
Definition: xmv.c:106
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1485
uint16_t flags
Flags.
Definition: xmv.c:81
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1647
An audio packet with an XMV file.
Definition: xmv.c:72
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3805
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1382
uint32_t frame_count
The amount of frames within this video packet.
Definition: xmv.c:62
uint32_t this_packet_size
Size of the current packet.
Definition: xmv.c:99
uint8_t * data
Definition: avcodec.h:1467
#define AVERROR_EOF
End of file.
Definition: error.h:55
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
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:252
uint64_t data_offset
The offset of the video data within the file.
Definition: xmv.c:59
int64_t last_pts
PTS of the last video frame.
Definition: xmv.c:67
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:442
uint32_t frame_size
Number of bytes to put into an audio frame.
Definition: xmv.c:90
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2917
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:545
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1499
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:101
A video packet with an XMV file.
Definition: xmv.c:55
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
uint64_t block_count
Running counter of decompressed audio block.
Definition: xmv.c:92
uint16_t bits_per_sample
Bits per compressed sample.
Definition: xmv.c:79
uint32_t sample_rate
Sampling rate.
Definition: xmv.c:78
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:667
#define AVERROR(e)
Definition: error.h:43
Context for demuxing an XMV file.
Definition: xmv.c:96
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
uint64_t next_packet_offset
Offset of the next packet.
Definition: xmv.c:103
unsigned block_align
Bytes per compressed block.
Definition: xmv.c:82
simple assert() macros that are a bit more flexible than ISO C assert().
#define XMV_AUDIO_ADPCM51
Audio flag: Any of the ADPCM'd 5.1 stream flags.
Definition: xmv.c:48
#define fail()
Definition: checkasm.h:80
uint64_t this_packet_offset
Offset of the current packet.
Definition: xmv.c:102
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1473
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:896
uint16_t current_stream
The index of the stream currently handling.
Definition: xmv.c:105
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:463
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:462
uint8_t extradata[4]
The extra data.
Definition: xmv.c:65
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1370
int stream_index
The decoder stream index for this video packet.
Definition: xmv.c:56
#define FFMIN(a, b)
Definition: common.h:96
static int xmv_read_header(AVFormatContext *s)
Definition: xmv.c:138
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
int width
picture width / height.
Definition: avcodec.h:1711
AVInputFormat ff_xmv_demuxer
Definition: xmv.c:573
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
#define XMV_MIN_HEADER_SIZE
The min size of an XMV header.
Definition: xmv.c:38
int64_t pts
PTS of the most current video frame.
Definition: xmv.c:68
static int xmv_process_packet_header(AVFormatContext *s)
Definition: xmv.c:293
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
Stream structure.
Definition: avformat.h:877
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int frame_size
Definition: mxfenc.c:1821
enum AVMediaType codec_type
Definition: avcodec.h:1540
enum AVCodecID codec_id
Definition: avcodec.h:1549
int sample_rate
samples per second
Definition: avcodec.h:2287
AVIOContext * pb
I/O context.
Definition: avformat.h:1356
static int xmv_fetch_audio_packet(AVFormatContext *s, AVPacket *pkt, uint32_t stream)
Definition: xmv.c:429
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1564
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2979
#define XMV_BLOCK_ALIGN_SIZE
Definition: xmv.c:52
int extradata_size
Definition: avcodec.h:1648
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
uint16_t audio_track_count
Number of audio track in this file.
Definition: xmv.c:97
uint16_t channels
Number of channels.
Definition: xmv.c:77
enum AVCodecID codec_id
The codec ID of the compression scheme.
Definition: xmv.c:85
uint32_t bit_rate
Bits of compressed data per second.
Definition: xmv.c:80
This structure contains the data a format has to probe a file.
Definition: avformat.h:460
int has_extradata
Does the video packet contain extra data?
Definition: xmv.c:64
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:936
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:472
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:651
Main libavformat public API header.
enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
Definition: riffdec.c:191
#define MKBETAG(a, b, c, d)
Definition: common.h:343
uint16_t block_samples
Decompressed samples per compressed block.
Definition: xmv.c:83
int channels
number of audio channels
Definition: avcodec.h:2288
void * priv_data
Format private data.
Definition: avformat.h:1342
uint32_t current_frame
The current frame within this video packet.
Definition: xmv.c:61
int stream_index
The decoder stream index for this audio packet.
Definition: xmv.c:73
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1466
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
static int xmv_read_close(AVFormatContext *s)
Definition: xmv.c:129
#define av_malloc_array(a, b)
int stream_index
Definition: avcodec.h:1469
static void loop_filter(const H264Context *h, H264SliceContext *sl, int start_x, int end_x)
Definition: h264_slice.c:2196
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1444
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1460
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240