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ipmovie.c
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1 /*
2  * Interplay MVE File Demuxer
3  * Copyright (c) 2003 The FFmpeg Project
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  * Interplay MVE file demuxer
25  * by Mike Melanson (melanson@pcisys.net)
26  * For more information regarding the Interplay MVE file format, visit:
27  * http://www.pcisys.net/~melanson/codecs/
28  * The aforementioned site also contains a command line utility for parsing
29  * IP MVE files so that you can get a good idea of the typical structure of
30  * such files. This demuxer is not the best example to use if you are trying
31  * to write your own as it uses a rather roundabout approach for splitting
32  * up and sending out the chunks.
33  */
34 
36 #include "libavutil/intreadwrite.h"
37 #include "avformat.h"
38 #include "internal.h"
39 
40 #define CHUNK_PREAMBLE_SIZE 4
41 #define OPCODE_PREAMBLE_SIZE 4
42 
43 #define CHUNK_INIT_AUDIO 0x0000
44 #define CHUNK_AUDIO_ONLY 0x0001
45 #define CHUNK_INIT_VIDEO 0x0002
46 #define CHUNK_VIDEO 0x0003
47 #define CHUNK_SHUTDOWN 0x0004
48 #define CHUNK_END 0x0005
49 /* these last types are used internally */
50 #define CHUNK_DONE 0xFFFC
51 #define CHUNK_NOMEM 0xFFFD
52 #define CHUNK_EOF 0xFFFE
53 #define CHUNK_BAD 0xFFFF
54 
55 #define OPCODE_END_OF_STREAM 0x00
56 #define OPCODE_END_OF_CHUNK 0x01
57 #define OPCODE_CREATE_TIMER 0x02
58 #define OPCODE_INIT_AUDIO_BUFFERS 0x03
59 #define OPCODE_START_STOP_AUDIO 0x04
60 #define OPCODE_INIT_VIDEO_BUFFERS 0x05
61 #define OPCODE_UNKNOWN_06 0x06
62 #define OPCODE_SEND_BUFFER 0x07
63 #define OPCODE_AUDIO_FRAME 0x08
64 #define OPCODE_SILENCE_FRAME 0x09
65 #define OPCODE_INIT_VIDEO_MODE 0x0A
66 #define OPCODE_CREATE_GRADIENT 0x0B
67 #define OPCODE_SET_PALETTE 0x0C
68 #define OPCODE_SET_PALETTE_COMPRESSED 0x0D
69 #define OPCODE_UNKNOWN_0E 0x0E
70 #define OPCODE_SET_DECODING_MAP 0x0F
71 #define OPCODE_UNKNOWN_10 0x10
72 #define OPCODE_VIDEO_DATA 0x11
73 #define OPCODE_UNKNOWN_12 0x12
74 #define OPCODE_UNKNOWN_13 0x13
75 #define OPCODE_UNKNOWN_14 0x14
76 #define OPCODE_UNKNOWN_15 0x15
77 
78 #define PALETTE_COUNT 256
79 
80 typedef struct IPMVEContext {
82  unsigned char *buf;
83  int buf_size;
84 
85  uint64_t frame_pts_inc;
86 
87  unsigned int video_bpp;
88  unsigned int video_width;
89  unsigned int video_height;
90  int64_t video_pts;
91  uint32_t palette[256];
93  int changed;
94 
95  unsigned int audio_bits;
96  unsigned int audio_channels;
97  unsigned int audio_sample_rate;
99  unsigned int audio_frame_count;
100 
103 
110 
112 
113 } IPMVEContext;
114 
116  AVPacket *pkt) {
117 
118  int chunk_type;
119 
120  if (s->audio_chunk_offset && s->audio_channels && s->audio_bits) {
121  if (s->audio_type == AV_CODEC_ID_NONE) {
122  av_log(NULL, AV_LOG_ERROR, "Can not read audio packet before"
123  "audio codec is known\n");
124  return CHUNK_BAD;
125  }
126 
127  /* adjust for PCM audio by skipping chunk header */
129  s->audio_chunk_offset += 6;
130  s->audio_chunk_size -= 6;
131  }
132 
133  avio_seek(pb, s->audio_chunk_offset, SEEK_SET);
134  s->audio_chunk_offset = 0;
135 
136  if (s->audio_chunk_size != av_get_packet(pb, pkt, s->audio_chunk_size))
137  return CHUNK_EOF;
138 
140  pkt->pts = s->audio_frame_count;
141 
142  /* audio frame maintenance */
144  s->audio_frame_count +=
145  (s->audio_chunk_size / s->audio_channels / (s->audio_bits / 8));
146  else
147  s->audio_frame_count +=
149 
150  av_log(NULL, AV_LOG_TRACE, "sending audio frame with pts %"PRId64" (%d audio frames)\n",
151  pkt->pts, s->audio_frame_count);
152 
153  chunk_type = CHUNK_VIDEO;
154 
155  } else if (s->decode_map_chunk_offset) {
156 
157  /* send both the decode map and the video data together */
158 
160  return CHUNK_NOMEM;
161 
162  if (s->has_palette) {
163  uint8_t *pal;
164 
167  if (pal) {
168  memcpy(pal, s->palette, AVPALETTE_SIZE);
169  s->has_palette = 0;
170  }
171  }
172 
173  if (s->changed) {
174  ff_add_param_change(pkt, 0, 0, 0, s->video_width, s->video_height);
175  s->changed = 0;
176  }
177  pkt->pos= s->decode_map_chunk_offset;
178  avio_seek(pb, s->decode_map_chunk_offset, SEEK_SET);
180 
181  if (avio_read(pb, pkt->data, s->decode_map_chunk_size) !=
183  av_free_packet(pkt);
184  return CHUNK_EOF;
185  }
186 
187  avio_seek(pb, s->video_chunk_offset, SEEK_SET);
188  s->video_chunk_offset = 0;
189 
190  if (avio_read(pb, pkt->data + s->decode_map_chunk_size,
192  av_free_packet(pkt);
193  return CHUNK_EOF;
194  }
195 
197  pkt->pts = s->video_pts;
198 
199  av_log(NULL, AV_LOG_TRACE, "sending video frame with pts %"PRId64"\n", pkt->pts);
200 
201  s->video_pts += s->frame_pts_inc;
202 
203  chunk_type = CHUNK_VIDEO;
204 
205  } else {
206 
207  avio_seek(pb, s->next_chunk_offset, SEEK_SET);
208  chunk_type = CHUNK_DONE;
209 
210  }
211 
212  return chunk_type;
213 }
214 
216 {
217  IPMVEContext *ipmovie = s->priv_data;
219  if (!st)
220  return AVERROR(ENOMEM);
221  avpriv_set_pts_info(st, 32, 1, ipmovie->audio_sample_rate);
222  ipmovie->audio_stream_index = st->index;
224  st->codec->codec_id = ipmovie->audio_type;
225  st->codec->codec_tag = 0; /* no tag */
226  st->codec->channels = ipmovie->audio_channels;
229  st->codec->sample_rate = ipmovie->audio_sample_rate;
230  st->codec->bits_per_coded_sample = ipmovie->audio_bits;
231  st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
234  st->codec->bit_rate /= 2;
236 
237  return 0;
238 }
239 
240 /* This function loads and processes a single chunk in an IP movie file.
241  * It returns the type of chunk that was processed. */
243  AVPacket *pkt)
244 {
245  unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
246  int chunk_type;
247  int chunk_size;
248  unsigned char opcode_preamble[OPCODE_PREAMBLE_SIZE];
249  unsigned char opcode_type;
250  unsigned char opcode_version;
251  int opcode_size;
252  unsigned char scratch[1024];
253  int i, j;
254  int first_color, last_color;
255  int audio_flags;
256  unsigned char r, g, b;
257  unsigned int width, height;
258 
259  /* see if there are any pending packets */
260  chunk_type = load_ipmovie_packet(s, pb, pkt);
261  if (chunk_type != CHUNK_DONE)
262  return chunk_type;
263 
264  /* read the next chunk, wherever the file happens to be pointing */
265  if (avio_feof(pb))
266  return CHUNK_EOF;
267  if (avio_read(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
269  return CHUNK_BAD;
270  chunk_size = AV_RL16(&chunk_preamble[0]);
271  chunk_type = AV_RL16(&chunk_preamble[2]);
272 
273  av_log(NULL, AV_LOG_TRACE, "chunk type 0x%04X, 0x%04X bytes: ", chunk_type, chunk_size);
274 
275  switch (chunk_type) {
276 
277  case CHUNK_INIT_AUDIO:
278  av_log(NULL, AV_LOG_TRACE, "initialize audio\n");
279  break;
280 
281  case CHUNK_AUDIO_ONLY:
282  av_log(NULL, AV_LOG_TRACE, "audio only\n");
283  break;
284 
285  case CHUNK_INIT_VIDEO:
286  av_log(NULL, AV_LOG_TRACE, "initialize video\n");
287  break;
288 
289  case CHUNK_VIDEO:
290  av_log(NULL, AV_LOG_TRACE, "video (and audio)\n");
291  break;
292 
293  case CHUNK_SHUTDOWN:
294  av_log(NULL, AV_LOG_TRACE, "shutdown\n");
295  break;
296 
297  case CHUNK_END:
298  av_log(NULL, AV_LOG_TRACE, "end\n");
299  break;
300 
301  default:
302  av_log(NULL, AV_LOG_TRACE, "invalid chunk\n");
303  chunk_type = CHUNK_BAD;
304  break;
305 
306  }
307 
308  while ((chunk_size > 0) && (chunk_type != CHUNK_BAD)) {
309 
310  /* read the next chunk, wherever the file happens to be pointing */
311  if (avio_feof(pb)) {
312  chunk_type = CHUNK_EOF;
313  break;
314  }
315  if (avio_read(pb, opcode_preamble, CHUNK_PREAMBLE_SIZE) !=
317  chunk_type = CHUNK_BAD;
318  break;
319  }
320 
321  opcode_size = AV_RL16(&opcode_preamble[0]);
322  opcode_type = opcode_preamble[2];
323  opcode_version = opcode_preamble[3];
324 
325  chunk_size -= OPCODE_PREAMBLE_SIZE;
326  chunk_size -= opcode_size;
327  if (chunk_size < 0) {
328  av_log(NULL, AV_LOG_TRACE, "chunk_size countdown just went negative\n");
329  chunk_type = CHUNK_BAD;
330  break;
331  }
332 
333  av_log(NULL, AV_LOG_TRACE, " opcode type %02X, version %d, 0x%04X bytes: ",
334  opcode_type, opcode_version, opcode_size);
335  switch (opcode_type) {
336 
338  av_log(NULL, AV_LOG_TRACE, "end of stream\n");
339  avio_skip(pb, opcode_size);
340  break;
341 
342  case OPCODE_END_OF_CHUNK:
343  av_log(NULL, AV_LOG_TRACE, "end of chunk\n");
344  avio_skip(pb, opcode_size);
345  break;
346 
347  case OPCODE_CREATE_TIMER:
348  av_log(NULL, AV_LOG_TRACE, "create timer\n");
349  if ((opcode_version > 0) || (opcode_size != 6)) {
350  av_log(NULL, AV_LOG_TRACE, "bad create_timer opcode\n");
351  chunk_type = CHUNK_BAD;
352  break;
353  }
354  if (avio_read(pb, scratch, opcode_size) !=
355  opcode_size) {
356  chunk_type = CHUNK_BAD;
357  break;
358  }
359  s->frame_pts_inc = ((uint64_t)AV_RL32(&scratch[0])) * AV_RL16(&scratch[4]);
360  av_log(NULL, AV_LOG_TRACE, " %.2f frames/second (timer div = %d, subdiv = %d)\n",
361  1000000.0 / s->frame_pts_inc, AV_RL32(&scratch[0]),
362  AV_RL16(&scratch[4]));
363  break;
364 
366  av_log(NULL, AV_LOG_TRACE, "initialize audio buffers\n");
367  if (opcode_version > 1 || opcode_size > 10 || opcode_size < 6) {
368  av_log(NULL, AV_LOG_TRACE, "bad init_audio_buffers opcode\n");
369  chunk_type = CHUNK_BAD;
370  break;
371  }
372  if (avio_read(pb, scratch, opcode_size) !=
373  opcode_size) {
374  chunk_type = CHUNK_BAD;
375  break;
376  }
377  s->audio_sample_rate = AV_RL16(&scratch[4]);
378  audio_flags = AV_RL16(&scratch[2]);
379  /* bit 0 of the flags: 0 = mono, 1 = stereo */
380  s->audio_channels = (audio_flags & 1) + 1;
381  /* bit 1 of the flags: 0 = 8 bit, 1 = 16 bit */
382  s->audio_bits = (((audio_flags >> 1) & 1) + 1) * 8;
383  /* bit 2 indicates compressed audio in version 1 opcode */
384  if ((opcode_version == 1) && (audio_flags & 0x4))
386  else if (s->audio_bits == 16)
388  else
390  av_log(NULL, AV_LOG_TRACE, "audio: %d bits, %d Hz, %s, %s format\n",
392  (s->audio_channels == 2) ? "stereo" : "mono",
394  "Interplay audio" : "PCM");
395  break;
396 
398  av_log(NULL, AV_LOG_TRACE, "start/stop audio\n");
399  avio_skip(pb, opcode_size);
400  break;
401 
403  av_log(NULL, AV_LOG_TRACE, "initialize video buffers\n");
404  if ((opcode_version > 2) || (opcode_size > 8) || opcode_size < 4
405  || opcode_version == 2 && opcode_size < 8
406  ) {
407  av_log(NULL, AV_LOG_TRACE, "bad init_video_buffers opcode\n");
408  chunk_type = CHUNK_BAD;
409  break;
410  }
411  if (avio_read(pb, scratch, opcode_size) !=
412  opcode_size) {
413  chunk_type = CHUNK_BAD;
414  break;
415  }
416  width = AV_RL16(&scratch[0]) * 8;
417  height = AV_RL16(&scratch[2]) * 8;
418  if (width != s->video_width) {
419  s->video_width = width;
420  s->changed++;
421  }
422  if (height != s->video_height) {
423  s->video_height = height;
424  s->changed++;
425  }
426  if (opcode_version < 2 || !AV_RL16(&scratch[6])) {
427  s->video_bpp = 8;
428  } else {
429  s->video_bpp = 16;
430  }
431  av_log(NULL, AV_LOG_TRACE, "video resolution: %d x %d\n",
432  s->video_width, s->video_height);
433  break;
434 
435  case OPCODE_UNKNOWN_06:
436  case OPCODE_UNKNOWN_0E:
437  case OPCODE_UNKNOWN_10:
438  case OPCODE_UNKNOWN_12:
439  case OPCODE_UNKNOWN_13:
440  case OPCODE_UNKNOWN_14:
441  case OPCODE_UNKNOWN_15:
442  av_log(NULL, AV_LOG_TRACE, "unknown (but documented) opcode %02X\n", opcode_type);
443  avio_skip(pb, opcode_size);
444  break;
445 
446  case OPCODE_SEND_BUFFER:
447  av_log(NULL, AV_LOG_TRACE, "send buffer\n");
448  avio_skip(pb, opcode_size);
449  break;
450 
451  case OPCODE_AUDIO_FRAME:
452  av_log(NULL, AV_LOG_TRACE, "audio frame\n");
453 
454  /* log position and move on for now */
455  s->audio_chunk_offset = avio_tell(pb);
456  s->audio_chunk_size = opcode_size;
457  avio_skip(pb, opcode_size);
458  break;
459 
461  av_log(NULL, AV_LOG_TRACE, "silence frame\n");
462  avio_skip(pb, opcode_size);
463  break;
464 
466  av_log(NULL, AV_LOG_TRACE, "initialize video mode\n");
467  avio_skip(pb, opcode_size);
468  break;
469 
471  av_log(NULL, AV_LOG_TRACE, "create gradient\n");
472  avio_skip(pb, opcode_size);
473  break;
474 
475  case OPCODE_SET_PALETTE:
476  av_log(NULL, AV_LOG_TRACE, "set palette\n");
477  /* check for the logical maximum palette size
478  * (3 * 256 + 4 bytes) */
479  if (opcode_size > 0x304 || opcode_size < 4) {
480  av_log(NULL, AV_LOG_TRACE, "demux_ipmovie: set_palette opcode with invalid size\n");
481  chunk_type = CHUNK_BAD;
482  break;
483  }
484  if (avio_read(pb, scratch, opcode_size) != opcode_size) {
485  chunk_type = CHUNK_BAD;
486  break;
487  }
488 
489  /* load the palette into internal data structure */
490  first_color = AV_RL16(&scratch[0]);
491  last_color = first_color + AV_RL16(&scratch[2]) - 1;
492  /* sanity check (since they are 16 bit values) */
493  if ( (first_color > 0xFF) || (last_color > 0xFF)
494  || (last_color - first_color + 1)*3 + 4 > opcode_size) {
495  av_log(NULL, AV_LOG_TRACE, "demux_ipmovie: set_palette indexes out of range (%d -> %d)\n",
496  first_color, last_color);
497  chunk_type = CHUNK_BAD;
498  break;
499  }
500  j = 4; /* offset of first palette data */
501  for (i = first_color; i <= last_color; i++) {
502  /* the palette is stored as a 6-bit VGA palette, thus each
503  * component is shifted up to a 8-bit range */
504  r = scratch[j++] * 4;
505  g = scratch[j++] * 4;
506  b = scratch[j++] * 4;
507  s->palette[i] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
508  s->palette[i] |= s->palette[i] >> 6 & 0x30303;
509  }
510  s->has_palette = 1;
511  break;
512 
514  av_log(NULL, AV_LOG_TRACE, "set palette compressed\n");
515  avio_skip(pb, opcode_size);
516  break;
517 
519  av_log(NULL, AV_LOG_TRACE, "set decoding map\n");
520 
521  /* log position and move on for now */
523  s->decode_map_chunk_size = opcode_size;
524  avio_skip(pb, opcode_size);
525  break;
526 
527  case OPCODE_VIDEO_DATA:
528  av_log(NULL, AV_LOG_TRACE, "set video data\n");
529 
530  /* log position and move on for now */
531  s->video_chunk_offset = avio_tell(pb);
532  s->video_chunk_size = opcode_size;
533  avio_skip(pb, opcode_size);
534  break;
535 
536  default:
537  av_log(NULL, AV_LOG_TRACE, "*** unknown opcode type\n");
538  chunk_type = CHUNK_BAD;
539  break;
540 
541  }
542  }
543 
544  if (s->avf->nb_streams == 1 && s->audio_type)
545  init_audio(s->avf);
546 
547  /* make a note of where the stream is sitting */
548  s->next_chunk_offset = avio_tell(pb);
549 
550  /* dispatch the first of any pending packets */
551  if ((chunk_type == CHUNK_VIDEO) || (chunk_type == CHUNK_AUDIO_ONLY))
552  chunk_type = load_ipmovie_packet(s, pb, pkt);
553 
554  return chunk_type;
555 }
556 
557 static const char signature[] = "Interplay MVE File\x1A\0\x1A";
558 
560 {
561  const uint8_t *b = p->buf;
562  const uint8_t *b_end = p->buf + p->buf_size - sizeof(signature);
563  do {
564  if (b[0] == signature[0] && memcmp(b, signature, sizeof(signature)) == 0)
565  return AVPROBE_SCORE_MAX;
566  b++;
567  } while (b < b_end);
568 
569  return 0;
570 }
571 
573 {
574  IPMVEContext *ipmovie = s->priv_data;
575  AVIOContext *pb = s->pb;
576  AVPacket pkt;
577  AVStream *st;
578  unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
579  int chunk_type, i;
580  uint8_t signature_buffer[sizeof(signature)];
581 
582  ipmovie->avf = s;
583 
584  avio_read(pb, signature_buffer, sizeof(signature_buffer));
585  while (memcmp(signature_buffer, signature, sizeof(signature))) {
586  memmove(signature_buffer, signature_buffer + 1, sizeof(signature_buffer) - 1);
587  signature_buffer[sizeof(signature_buffer) - 1] = avio_r8(pb);
588  if (avio_feof(pb))
589  return AVERROR_EOF;
590  }
591  /* initialize private context members */
592  ipmovie->video_pts = ipmovie->audio_frame_count = 0;
593  ipmovie->audio_chunk_offset = ipmovie->video_chunk_offset =
594  ipmovie->decode_map_chunk_offset = 0;
595 
596  /* on the first read, this will position the stream at the first chunk */
597  ipmovie->next_chunk_offset = avio_tell(pb) + 4;
598 
599  for (i = 0; i < 256; i++)
600  ipmovie->palette[i] = 0xFFU << 24;
601 
602  /* process the first chunk which should be CHUNK_INIT_VIDEO */
603  if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_VIDEO)
604  return AVERROR_INVALIDDATA;
605 
606  /* peek ahead to the next chunk-- if it is an init audio chunk, process
607  * it; if it is the first video chunk, this is a silent file */
608  if (avio_read(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
610  return AVERROR(EIO);
611  chunk_type = AV_RL16(&chunk_preamble[2]);
612  avio_seek(pb, -CHUNK_PREAMBLE_SIZE, SEEK_CUR);
613 
614  if (chunk_type == CHUNK_VIDEO)
615  ipmovie->audio_type = AV_CODEC_ID_NONE; /* no audio */
616  else if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_AUDIO)
617  return AVERROR_INVALIDDATA;
618 
619  /* initialize the stream decoders */
620  st = avformat_new_stream(s, NULL);
621  if (!st)
622  return AVERROR(ENOMEM);
623  avpriv_set_pts_info(st, 63, 1, 1000000);
624  ipmovie->video_stream_index = st->index;
627  st->codec->codec_tag = 0; /* no fourcc */
628  st->codec->width = ipmovie->video_width;
629  st->codec->height = ipmovie->video_height;
630  st->codec->bits_per_coded_sample = ipmovie->video_bpp;
631 
632  if (ipmovie->audio_type) {
633  return init_audio(s);
634  } else
636 
637  return 0;
638 }
639 
641  AVPacket *pkt)
642 {
643  IPMVEContext *ipmovie = s->priv_data;
644  AVIOContext *pb = s->pb;
645  int ret;
646 
647  for (;;) {
648  ret = process_ipmovie_chunk(ipmovie, pb, pkt);
649  if (ret == CHUNK_BAD)
650  ret = AVERROR_INVALIDDATA;
651  else if (ret == CHUNK_EOF)
652  ret = AVERROR(EIO);
653  else if (ret == CHUNK_NOMEM)
654  ret = AVERROR(ENOMEM);
655  else if (ret == CHUNK_VIDEO)
656  ret = 0;
657  else if (ret == CHUNK_INIT_VIDEO || ret == CHUNK_INIT_AUDIO)
658  continue;
659  else
660  continue;
661 
662  return ret;
663  }
664 }
665 
667  .name = "ipmovie",
668  .long_name = NULL_IF_CONFIG_SMALL("Interplay MVE"),
669  .priv_data_size = sizeof(IPMVEContext),
673 };
#define OPCODE_SET_PALETTE_COMPRESSED
Definition: ipmovie.c:68
int64_t decode_map_chunk_offset
Definition: ipmovie.c:108
#define OPCODE_UNKNOWN_06
Definition: ipmovie.c:61
#define NULL
Definition: coverity.c:32
#define OPCODE_SEND_BUFFER
Definition: ipmovie.c:62
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
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:280
static int ipmovie_read_header(AVFormatContext *s)
Definition: ipmovie.c:572
#define OPCODE_VIDEO_DATA
Definition: ipmovie.c:72
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1448
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:4083
const char * g
Definition: vf_curves.c:108
int audio_stream_index
Definition: ipmovie.c:102
#define OPCODE_UNKNOWN_14
Definition: ipmovie.c:75
int index
stream index in AVFormatContext
Definition: avformat.h:843
const char * b
Definition: vf_curves.c:109
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:204
#define CHUNK_INIT_VIDEO
Definition: ipmovie.c:45
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:277
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1322
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h: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:2299
#define OPCODE_CREATE_GRADIENT
Definition: ipmovie.c:66
static int ipmovie_probe(AVProbeData *p)
Definition: ipmovie.c:559
Format I/O context.
Definition: avformat.h:1273
static const char signature[]
Definition: ipmovie.c:557
#define OPCODE_UNKNOWN_12
Definition: ipmovie.c:73
int64_t audio_chunk_offset
Definition: ipmovie.c:104
#define CHUNK_END
Definition: ipmovie.c:48
uint8_t
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1232
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int audio_channels
Definition: ipmovie.c:96
#define AVPALETTE_SIZE
Definition: pixfmt.h:33
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3749
uint8_t * data
Definition: avcodec.h:1423
int decode_map_chunk_size
Definition: ipmovie.c:109
int64_t next_chunk_offset
Definition: ipmovie.c:111
#define AVERROR_EOF
End of file.
Definition: error.h:55
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:244
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:390
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2996
unsigned int video_bpp
Definition: ipmovie.c:87
#define av_log(a,...)
unsigned int video_height
Definition: ipmovie.c:89
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:538
AVFormatContext * avf
Definition: ipmovie.c:81
#define U(x)
Definition: vp56_arith.h:37
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:83
#define OPCODE_INIT_AUDIO_BUFFERS
Definition: ipmovie.c:58
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:102
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
const char * r
Definition: vf_curves.c:107
int ff_add_param_change(AVPacket *pkt, int32_t channels, uint64_t channel_layout, int32_t sample_rate, int32_t width, int32_t height)
Add side data to a packet for changing parameters to the given values.
Definition: utils.c:4223
int video_chunk_size
Definition: ipmovie.c:107
#define OPCODE_UNKNOWN_13
Definition: ipmovie.c:74
#define OPCODE_SET_DECODING_MAP
Definition: ipmovie.c:70
#define OPCODE_END_OF_CHUNK
Definition: ipmovie.c:56
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2323
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:529
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:451
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
int buf_size
Definition: ipmovie.c:83
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1329
int bit_rate
the average bitrate
Definition: avcodec.h:1567
audio channel layout utility functions
unsigned int audio_bits
Definition: ipmovie.c:95
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
#define OPCODE_UNKNOWN_10
Definition: ipmovie.c:71
int width
picture width / height.
Definition: avcodec.h:1681
#define OPCODE_PREAMBLE_SIZE
Definition: ipmovie.c:41
#define CHUNK_SHUTDOWN
Definition: ipmovie.c:47
#define OPCODE_START_STOP_AUDIO
Definition: ipmovie.c:59
#define OPCODE_UNKNOWN_0E
Definition: ipmovie.c:69
#define OPCODE_END_OF_STREAM
Definition: ipmovie.c:55
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:623
unsigned char * buf
Definition: ipmovie.c:82
enum AVCodecID audio_type
Definition: ipmovie.c:98
Stream structure.
Definition: avformat.h:842
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define OPCODE_INIT_VIDEO_MODE
Definition: ipmovie.c:65
enum AVMediaType codec_type
Definition: avcodec.h:1510
enum AVCodecID codec_id
Definition: avcodec.h:1519
int sample_rate
samples per second
Definition: avcodec.h:2262
AVIOContext * pb
I/O context.
Definition: avformat.h:1315
#define CHUNK_AUDIO_ONLY
Definition: ipmovie.c:44
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1534
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
static int init_audio(AVFormatContext *s)
Definition: ipmovie.c:215
static int load_ipmovie_packet(IPMVEContext *s, AVIOContext *pb, AVPacket *pkt)
Definition: ipmovie.c:115
#define OPCODE_INIT_VIDEO_BUFFERS
Definition: ipmovie.c:60
int64_t video_chunk_offset
Definition: ipmovie.c:106
unsigned int video_width
Definition: ipmovie.c:88
int audio_chunk_size
Definition: ipmovie.c:105
uint32_t palette[256]
Definition: ipmovie.c:91
#define CHUNK_INIT_AUDIO
Definition: ipmovie.c:43
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb, AVPacket *pkt)
Definition: ipmovie.c:242
#define OPCODE_AUDIO_FRAME
Definition: ipmovie.c:63
#define OPCODE_CREATE_TIMER
Definition: ipmovie.c:57
int64_t video_pts
Definition: ipmovie.c:90
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
#define CHUNK_DONE
Definition: ipmovie.c:50
Main libavformat public API header.
int video_stream_index
Definition: ipmovie.c:101
if(ret< 0)
Definition: vf_mcdeint.c:280
#define OPCODE_SILENCE_FRAME
Definition: ipmovie.c:64
#define CHUNK_PREAMBLE_SIZE
Definition: ipmovie.c:40
AVInputFormat ff_ipmovie_demuxer
Definition: ipmovie.c:666
#define OPCODE_SET_PALETTE
Definition: ipmovie.c:67
int channels
number of audio channels
Definition: avcodec.h:2263
unsigned int audio_frame_count
Definition: ipmovie.c:99
void * priv_data
Format private data.
Definition: avformat.h:1301
#define OPCODE_UNKNOWN_15
Definition: ipmovie.c:76
#define CHUNK_NOMEM
Definition: ipmovie.c:51
static int ipmovie_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ipmovie.c:640
#define CHUNK_BAD
Definition: ipmovie.c:53
#define CHUNK_EOF
Definition: ipmovie.c:52
uint64_t frame_pts_inc
Definition: ipmovie.c:85
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:628
int has_palette
Definition: ipmovie.c:92
#define CHUNK_VIDEO
Definition: ipmovie.c:46
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:301
int changed
Definition: ipmovie.c:93
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:299
int stream_index
Definition: avcodec.h:1425
#define AV_CH_LAYOUT_MONO
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1400
unsigned int audio_sample_rate
Definition: ipmovie.c:97
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1416
static int width