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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_VIDEO_DATA_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_SET_SKIP_MAP 0x0E
70 #define OPCODE_SET_DECODING_MAP 0x0F
71 #define OPCODE_VIDEO_DATA_10 0x10
72 #define OPCODE_VIDEO_DATA_11 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;
96 
97  unsigned int audio_bits;
98  unsigned int audio_channels;
99  unsigned int audio_sample_rate;
101  unsigned int audio_frame_count;
102 
105 
114 
116 
117 } IPMVEContext;
118 
120  AVPacket *pkt) {
121 
122  int chunk_type;
123 
124  if (s->audio_chunk_offset && s->audio_channels && s->audio_bits) {
125  if (s->audio_type == AV_CODEC_ID_NONE) {
126  av_log(s->avf, AV_LOG_ERROR, "Can not read audio packet before"
127  "audio codec is known\n");
128  return CHUNK_BAD;
129  }
130 
131  /* adjust for PCM audio by skipping chunk header */
133  s->audio_chunk_offset += 6;
134  s->audio_chunk_size -= 6;
135  }
136 
137  avio_seek(pb, s->audio_chunk_offset, SEEK_SET);
138  s->audio_chunk_offset = 0;
139 
140  if (s->audio_chunk_size != av_get_packet(pb, pkt, s->audio_chunk_size))
141  return CHUNK_EOF;
142 
144  pkt->pts = s->audio_frame_count;
145 
146  /* audio frame maintenance */
148  s->audio_frame_count +=
149  (s->audio_chunk_size / s->audio_channels / (s->audio_bits / 8));
150  else
151  s->audio_frame_count +=
153 
154  av_log(s->avf, AV_LOG_TRACE, "sending audio frame with pts %"PRId64" (%d audio frames)\n",
155  pkt->pts, s->audio_frame_count);
156 
157  chunk_type = CHUNK_VIDEO;
158 
159  } else if (s->frame_format) {
160 
161  /* send the frame format, decode map, the video data, skip map, and the send_buffer flag together */
162 
164  return CHUNK_NOMEM;
165 
166  if (s->has_palette) {
167  uint8_t *pal;
168 
171  if (pal) {
172  memcpy(pal, s->palette, AVPALETTE_SIZE);
173  s->has_palette = 0;
174  }
175  }
176 
177  if (s->changed) {
178  ff_add_param_change(pkt, 0, 0, 0, s->video_width, s->video_height);
179  s->changed = 0;
180  }
181 
182  AV_WL8(pkt->data, s->frame_format);
183  AV_WL8(pkt->data + 1, s->send_buffer);
184  AV_WL16(pkt->data + 2, s->video_chunk_size);
185  AV_WL16(pkt->data + 4, s->decode_map_chunk_size);
186  AV_WL16(pkt->data + 6, s->skip_map_chunk_size);
187 
188  s->frame_format = 0;
189  s->send_buffer = 0;
190 
191  pkt->pos = s->video_chunk_offset;
192  avio_seek(pb, s->video_chunk_offset, SEEK_SET);
193  s->video_chunk_offset = 0;
194 
195  if (avio_read(pb, pkt->data + 8, s->video_chunk_size) !=
196  s->video_chunk_size) {
197  av_packet_unref(pkt);
198  return CHUNK_EOF;
199  }
200 
201  if (s->decode_map_chunk_size) {
202  pkt->pos = s->decode_map_chunk_offset;
203  avio_seek(pb, s->decode_map_chunk_offset, SEEK_SET);
205 
206  if (avio_read(pb, pkt->data + 8 + s->video_chunk_size,
208  av_packet_unref(pkt);
209  return CHUNK_EOF;
210  }
211  }
212 
213  if (s->skip_map_chunk_size) {
214  pkt->pos = s->skip_map_chunk_offset;
215  avio_seek(pb, s->skip_map_chunk_offset, SEEK_SET);
216  s->skip_map_chunk_offset = 0;
217 
218  if (avio_read(pb, pkt->data + 8 + s->video_chunk_size + s->decode_map_chunk_size,
220  av_packet_unref(pkt);
221  return CHUNK_EOF;
222  }
223  }
224 
225  s->video_chunk_size = 0;
226  s->decode_map_chunk_size = 0;
227  s->skip_map_chunk_size = 0;
228 
230  pkt->pts = s->video_pts;
231 
232  av_log(s->avf, AV_LOG_TRACE, "sending video frame with pts %"PRId64"\n", pkt->pts);
233 
234  s->video_pts += s->frame_pts_inc;
235 
236  chunk_type = CHUNK_VIDEO;
237 
238  } else {
239 
240  avio_seek(pb, s->next_chunk_offset, SEEK_SET);
241  chunk_type = CHUNK_DONE;
242 
243  }
244 
245  return chunk_type;
246 }
247 
249 {
250  IPMVEContext *ipmovie = s->priv_data;
252  if (!st)
253  return AVERROR(ENOMEM);
254  avpriv_set_pts_info(st, 32, 1, ipmovie->audio_sample_rate);
255  ipmovie->audio_stream_index = st->index;
257  st->codecpar->codec_id = ipmovie->audio_type;
258  st->codecpar->codec_tag = 0; /* no tag */
259  st->codecpar->channels = ipmovie->audio_channels;
262  st->codecpar->sample_rate = ipmovie->audio_sample_rate;
263  st->codecpar->bits_per_coded_sample = ipmovie->audio_bits;
267  st->codecpar->bit_rate /= 2;
269 
270  return 0;
271 }
272 
273 /* This function loads and processes a single chunk in an IP movie file.
274  * It returns the type of chunk that was processed. */
276  AVPacket *pkt)
277 {
278  unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
279  int chunk_type;
280  int chunk_size;
281  unsigned char opcode_preamble[OPCODE_PREAMBLE_SIZE];
282  unsigned char opcode_type;
283  unsigned char opcode_version;
284  int opcode_size;
285  unsigned char scratch[1024];
286  int i, j;
287  int first_color, last_color;
288  int audio_flags;
289  unsigned char r, g, b;
290  unsigned int width, height;
291 
292  /* see if there are any pending packets */
293  chunk_type = load_ipmovie_packet(s, pb, pkt);
294  if (chunk_type != CHUNK_DONE)
295  return chunk_type;
296 
297  /* read the next chunk, wherever the file happens to be pointing */
298  if (avio_feof(pb))
299  return CHUNK_EOF;
300  if (avio_read(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
302  return CHUNK_BAD;
303  chunk_size = AV_RL16(&chunk_preamble[0]);
304  chunk_type = AV_RL16(&chunk_preamble[2]);
305 
306  av_log(s->avf, AV_LOG_TRACE, "chunk type 0x%04X, 0x%04X bytes: ", chunk_type, chunk_size);
307 
308  switch (chunk_type) {
309 
310  case CHUNK_INIT_AUDIO:
311  av_log(s->avf, AV_LOG_TRACE, "initialize audio\n");
312  break;
313 
314  case CHUNK_AUDIO_ONLY:
315  av_log(s->avf, AV_LOG_TRACE, "audio only\n");
316  break;
317 
318  case CHUNK_INIT_VIDEO:
319  av_log(s->avf, AV_LOG_TRACE, "initialize video\n");
320  break;
321 
322  case CHUNK_VIDEO:
323  av_log(s->avf, AV_LOG_TRACE, "video (and audio)\n");
324  break;
325 
326  case CHUNK_SHUTDOWN:
327  av_log(s->avf, AV_LOG_TRACE, "shutdown\n");
328  break;
329 
330  case CHUNK_END:
331  av_log(s->avf, AV_LOG_TRACE, "end\n");
332  break;
333 
334  default:
335  av_log(s->avf, AV_LOG_TRACE, "invalid chunk\n");
336  chunk_type = CHUNK_BAD;
337  break;
338 
339  }
340 
341  while ((chunk_size > 0) && (chunk_type != CHUNK_BAD)) {
342 
343  /* read the next chunk, wherever the file happens to be pointing */
344  if (avio_feof(pb)) {
345  chunk_type = CHUNK_EOF;
346  break;
347  }
348  if (avio_read(pb, opcode_preamble, CHUNK_PREAMBLE_SIZE) !=
350  chunk_type = CHUNK_BAD;
351  break;
352  }
353 
354  opcode_size = AV_RL16(&opcode_preamble[0]);
355  opcode_type = opcode_preamble[2];
356  opcode_version = opcode_preamble[3];
357 
358  chunk_size -= OPCODE_PREAMBLE_SIZE;
359  chunk_size -= opcode_size;
360  if (chunk_size < 0) {
361  av_log(s->avf, AV_LOG_TRACE, "chunk_size countdown just went negative\n");
362  chunk_type = CHUNK_BAD;
363  break;
364  }
365 
366  av_log(s->avf, AV_LOG_TRACE, " opcode type %02X, version %d, 0x%04X bytes: ",
367  opcode_type, opcode_version, opcode_size);
368  switch (opcode_type) {
369 
371  av_log(s->avf, AV_LOG_TRACE, "end of stream\n");
372  avio_skip(pb, opcode_size);
373  break;
374 
375  case OPCODE_END_OF_CHUNK:
376  av_log(s->avf, AV_LOG_TRACE, "end of chunk\n");
377  avio_skip(pb, opcode_size);
378  break;
379 
380  case OPCODE_CREATE_TIMER:
381  av_log(s->avf, AV_LOG_TRACE, "create timer\n");
382  if ((opcode_version > 0) || (opcode_size != 6)) {
383  av_log(s->avf, AV_LOG_TRACE, "bad create_timer opcode\n");
384  chunk_type = CHUNK_BAD;
385  break;
386  }
387  if (avio_read(pb, scratch, opcode_size) !=
388  opcode_size) {
389  chunk_type = CHUNK_BAD;
390  break;
391  }
392  s->frame_pts_inc = ((uint64_t)AV_RL32(&scratch[0])) * AV_RL16(&scratch[4]);
393  break;
394 
396  av_log(s->avf, AV_LOG_TRACE, "initialize audio buffers\n");
397  if (opcode_version > 1 || opcode_size > 10 || opcode_size < 6) {
398  av_log(s->avf, AV_LOG_TRACE, "bad init_audio_buffers opcode\n");
399  chunk_type = CHUNK_BAD;
400  break;
401  }
402  if (avio_read(pb, scratch, opcode_size) !=
403  opcode_size) {
404  chunk_type = CHUNK_BAD;
405  break;
406  }
407  s->audio_sample_rate = AV_RL16(&scratch[4]);
408  audio_flags = AV_RL16(&scratch[2]);
409  /* bit 0 of the flags: 0 = mono, 1 = stereo */
410  s->audio_channels = (audio_flags & 1) + 1;
411  /* bit 1 of the flags: 0 = 8 bit, 1 = 16 bit */
412  s->audio_bits = (((audio_flags >> 1) & 1) + 1) * 8;
413  /* bit 2 indicates compressed audio in version 1 opcode */
414  if ((opcode_version == 1) && (audio_flags & 0x4))
416  else if (s->audio_bits == 16)
418  else
420  av_log(s->avf, AV_LOG_TRACE, "audio: %d bits, %d Hz, %s, %s format\n",
422  (s->audio_channels == 2) ? "stereo" : "mono",
424  "Interplay audio" : "PCM");
425  break;
426 
428  av_log(s->avf, AV_LOG_TRACE, "start/stop audio\n");
429  avio_skip(pb, opcode_size);
430  break;
431 
433  av_log(s->avf, AV_LOG_TRACE, "initialize video buffers\n");
434  if ((opcode_version > 2) || (opcode_size > 8) || opcode_size < 4
435  || opcode_version == 2 && opcode_size < 8
436  ) {
437  av_log(s->avf, AV_LOG_TRACE, "bad init_video_buffers opcode\n");
438  chunk_type = CHUNK_BAD;
439  break;
440  }
441  if (avio_read(pb, scratch, opcode_size) !=
442  opcode_size) {
443  chunk_type = CHUNK_BAD;
444  break;
445  }
446  width = AV_RL16(&scratch[0]) * 8;
447  height = AV_RL16(&scratch[2]) * 8;
448  if (width != s->video_width) {
449  s->video_width = width;
450  s->changed++;
451  }
452  if (height != s->video_height) {
453  s->video_height = height;
454  s->changed++;
455  }
456  if (opcode_version < 2 || !AV_RL16(&scratch[6])) {
457  s->video_bpp = 8;
458  } else {
459  s->video_bpp = 16;
460  }
461  av_log(s->avf, AV_LOG_TRACE, "video resolution: %d x %d\n",
462  s->video_width, s->video_height);
463  break;
464 
465  case OPCODE_UNKNOWN_12:
466  case OPCODE_UNKNOWN_13:
467  case OPCODE_UNKNOWN_14:
468  case OPCODE_UNKNOWN_15:
469  av_log(s->avf, AV_LOG_TRACE, "unknown (but documented) opcode %02X\n", opcode_type);
470  avio_skip(pb, opcode_size);
471  break;
472 
473  case OPCODE_SEND_BUFFER:
474  av_log(s->avf, AV_LOG_TRACE, "send buffer\n");
475  avio_skip(pb, opcode_size);
476  s->send_buffer = 1;
477  break;
478 
479  case OPCODE_AUDIO_FRAME:
480  av_log(s->avf, AV_LOG_TRACE, "audio frame\n");
481 
482  /* log position and move on for now */
483  s->audio_chunk_offset = avio_tell(pb);
484  s->audio_chunk_size = opcode_size;
485  avio_skip(pb, opcode_size);
486  break;
487 
489  av_log(s->avf, AV_LOG_TRACE, "silence frame\n");
490  avio_skip(pb, opcode_size);
491  break;
492 
494  av_log(s->avf, AV_LOG_TRACE, "initialize video mode\n");
495  avio_skip(pb, opcode_size);
496  break;
497 
499  av_log(s->avf, AV_LOG_TRACE, "create gradient\n");
500  avio_skip(pb, opcode_size);
501  break;
502 
503  case OPCODE_SET_PALETTE:
504  av_log(s->avf, AV_LOG_TRACE, "set palette\n");
505  /* check for the logical maximum palette size
506  * (3 * 256 + 4 bytes) */
507  if (opcode_size > 0x304 || opcode_size < 4) {
508  av_log(s->avf, AV_LOG_TRACE, "demux_ipmovie: set_palette opcode with invalid size\n");
509  chunk_type = CHUNK_BAD;
510  break;
511  }
512  if (avio_read(pb, scratch, opcode_size) != opcode_size) {
513  chunk_type = CHUNK_BAD;
514  break;
515  }
516 
517  /* load the palette into internal data structure */
518  first_color = AV_RL16(&scratch[0]);
519  last_color = first_color + AV_RL16(&scratch[2]) - 1;
520  /* sanity check (since they are 16 bit values) */
521  if ( (first_color > 0xFF) || (last_color > 0xFF)
522  || (last_color - first_color + 1)*3 + 4 > opcode_size) {
523  av_log(s->avf, AV_LOG_TRACE, "demux_ipmovie: set_palette indexes out of range (%d -> %d)\n",
524  first_color, last_color);
525  chunk_type = CHUNK_BAD;
526  break;
527  }
528  j = 4; /* offset of first palette data */
529  for (i = first_color; i <= last_color; i++) {
530  /* the palette is stored as a 6-bit VGA palette, thus each
531  * component is shifted up to a 8-bit range */
532  r = scratch[j++] * 4;
533  g = scratch[j++] * 4;
534  b = scratch[j++] * 4;
535  s->palette[i] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
536  s->palette[i] |= s->palette[i] >> 6 & 0x30303;
537  }
538  s->has_palette = 1;
539  break;
540 
542  av_log(s->avf, AV_LOG_TRACE, "set palette compressed\n");
543  avio_skip(pb, opcode_size);
544  break;
545 
546  case OPCODE_SET_SKIP_MAP:
547  av_log(s->avf, AV_LOG_TRACE, "set skip map\n");
548 
549  /* log position and move on for now */
551  s->skip_map_chunk_size = opcode_size;
552  avio_skip(pb, opcode_size);
553  break;
554 
556  av_log(s->avf, AV_LOG_TRACE, "set decoding map\n");
557 
558  /* log position and move on for now */
560  s->decode_map_chunk_size = opcode_size;
561  avio_skip(pb, opcode_size);
562  break;
563 
565  av_log(s->avf, AV_LOG_TRACE, "set video data format 0x06\n");
566  s->frame_format = 0x06;
567 
568  /* log position and move on for now */
569  s->video_chunk_offset = avio_tell(pb);
570  s->video_chunk_size = opcode_size;
571  avio_skip(pb, opcode_size);
572  break;
573 
575  av_log(s->avf, AV_LOG_TRACE, "set video data format 0x10\n");
576  s->frame_format = 0x10;
577 
578  /* log position and move on for now */
579  s->video_chunk_offset = avio_tell(pb);
580  s->video_chunk_size = opcode_size;
581  avio_skip(pb, opcode_size);
582  break;
583 
585  av_log(s->avf, AV_LOG_TRACE, "set video data format 0x11\n");
586  s->frame_format = 0x11;
587 
588  /* log position and move on for now */
589  s->video_chunk_offset = avio_tell(pb);
590  s->video_chunk_size = opcode_size;
591  avio_skip(pb, opcode_size);
592  break;
593 
594  default:
595  av_log(s->avf, AV_LOG_TRACE, "*** unknown opcode type\n");
596  chunk_type = CHUNK_BAD;
597  break;
598 
599  }
600  }
601 
602  if (s->avf->nb_streams == 1 && s->audio_type)
603  init_audio(s->avf);
604 
605  /* make a note of where the stream is sitting */
606  s->next_chunk_offset = avio_tell(pb);
607 
608  /* dispatch the first of any pending packets */
609  if ((chunk_type == CHUNK_VIDEO) || (chunk_type == CHUNK_AUDIO_ONLY))
610  chunk_type = load_ipmovie_packet(s, pb, pkt);
611 
612  return chunk_type;
613 }
614 
615 static const char signature[] = "Interplay MVE File\x1A\0\x1A";
616 
618 {
619  const uint8_t *b = p->buf;
620  const uint8_t *b_end = p->buf + p->buf_size - sizeof(signature);
621  do {
622  if (b[0] == signature[0] && memcmp(b, signature, sizeof(signature)) == 0)
623  return AVPROBE_SCORE_MAX;
624  b++;
625  } while (b < b_end);
626 
627  return 0;
628 }
629 
631 {
632  IPMVEContext *ipmovie = s->priv_data;
633  AVIOContext *pb = s->pb;
634  AVPacket pkt;
635  AVStream *st;
636  unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
637  int chunk_type, i;
638  uint8_t signature_buffer[sizeof(signature)];
639 
640  ipmovie->avf = s;
641 
642  avio_read(pb, signature_buffer, sizeof(signature_buffer));
643  while (memcmp(signature_buffer, signature, sizeof(signature))) {
644  memmove(signature_buffer, signature_buffer + 1, sizeof(signature_buffer) - 1);
645  signature_buffer[sizeof(signature_buffer) - 1] = avio_r8(pb);
646  if (avio_feof(pb))
647  return AVERROR_EOF;
648  }
649  /* initialize private context members */
650  ipmovie->video_pts = ipmovie->audio_frame_count = 0;
651  ipmovie->audio_chunk_offset = ipmovie->video_chunk_offset =
652  ipmovie->decode_map_chunk_offset = ipmovie->skip_map_chunk_offset = 0;
653  ipmovie->decode_map_chunk_size = ipmovie->video_chunk_size =
654  ipmovie->skip_map_chunk_size = 0;
655  ipmovie->send_buffer = ipmovie->frame_format = 0;
656 
657  /* on the first read, this will position the stream at the first chunk */
658  ipmovie->next_chunk_offset = avio_tell(pb) + 4;
659 
660  for (i = 0; i < 256; i++)
661  ipmovie->palette[i] = 0xFFU << 24;
662 
663  /* process the first chunk which should be CHUNK_INIT_VIDEO */
664  if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_VIDEO)
665  return AVERROR_INVALIDDATA;
666 
667  /* peek ahead to the next chunk-- if it is an init audio chunk, process
668  * it; if it is the first video chunk, this is a silent file */
669  if (avio_read(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
671  return AVERROR(EIO);
672  chunk_type = AV_RL16(&chunk_preamble[2]);
673  avio_seek(pb, -CHUNK_PREAMBLE_SIZE, SEEK_CUR);
674 
675  if (chunk_type == CHUNK_VIDEO)
676  ipmovie->audio_type = AV_CODEC_ID_NONE; /* no audio */
677  else if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_AUDIO)
678  return AVERROR_INVALIDDATA;
679 
680  /* initialize the stream decoders */
681  st = avformat_new_stream(s, NULL);
682  if (!st)
683  return AVERROR(ENOMEM);
684  avpriv_set_pts_info(st, 63, 1, 1000000);
685  ipmovie->video_stream_index = st->index;
688  st->codecpar->codec_tag = 0; /* no fourcc */
689  st->codecpar->width = ipmovie->video_width;
690  st->codecpar->height = ipmovie->video_height;
691  st->codecpar->bits_per_coded_sample = ipmovie->video_bpp;
692 
693  if (ipmovie->audio_type) {
694  return init_audio(s);
695  } else
697 
698  return 0;
699 }
700 
702  AVPacket *pkt)
703 {
704  IPMVEContext *ipmovie = s->priv_data;
705  AVIOContext *pb = s->pb;
706  int ret;
707 
708  for (;;) {
709  ret = process_ipmovie_chunk(ipmovie, pb, pkt);
710  if (ret == CHUNK_BAD)
711  ret = AVERROR_INVALIDDATA;
712  else if (ret == CHUNK_EOF)
713  ret = AVERROR(EIO);
714  else if (ret == CHUNK_NOMEM)
715  ret = AVERROR(ENOMEM);
716  else if (ret == CHUNK_END || ret == CHUNK_SHUTDOWN)
717  ret = AVERROR_EOF;
718  else if (ret == CHUNK_VIDEO)
719  ret = 0;
720  else if (ret == CHUNK_INIT_VIDEO || ret == CHUNK_INIT_AUDIO)
721  continue;
722  else
723  continue;
724 
725  return ret;
726  }
727 }
728 
730  .name = "ipmovie",
731  .long_name = NULL_IF_CONFIG_SMALL("Interplay MVE"),
732  .priv_data_size = sizeof(IPMVEContext),
736 };
#define OPCODE_SET_PALETTE_COMPRESSED
Definition: ipmovie.c:68
int64_t decode_map_chunk_offset
Definition: ipmovie.c:112
#define NULL
Definition: coverity.c:32
#define OPCODE_SEND_BUFFER
Definition: ipmovie.c:62
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t skip_map_chunk_offset
Definition: ipmovie.c:110
static int ipmovie_read_header(AVFormatContext *s)
Definition: ipmovie.c:630
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1419
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:4747
const char * g
Definition: vf_curves.c:112
int audio_stream_index
Definition: ipmovie.c:104
#define OPCODE_UNKNOWN_14
Definition: ipmovie.c:75
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3736
int index
stream index in AVFormatContext
Definition: avformat.h:873
const char * b
Definition: vf_curves.c:113
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:244
#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:329
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1374
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
#define OPCODE_CREATE_GRADIENT
Definition: ipmovie.c:66
static int ipmovie_probe(AVProbeData *p)
Definition: ipmovie.c:617
Format I/O context.
Definition: avformat.h:1325
static const char signature[]
Definition: ipmovie.c:615
#define OPCODE_UNKNOWN_12
Definition: ipmovie.c:73
int64_t audio_chunk_offset
Definition: ipmovie.c:106
#define CHUNK_END
Definition: ipmovie.c:48
uint8_t
int width
Video only.
Definition: avcodec.h:3802
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1278
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int audio_channels
Definition: ipmovie.c:98
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
#define AV_WL8(p, d)
Definition: intreadwrite.h:399
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4377
#define height
uint8_t * data
Definition: avcodec.h:1399
int decode_map_chunk_size
Definition: ipmovie.c:113
int64_t next_chunk_offset
Definition: ipmovie.c:115
#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:293
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:558
unsigned int video_bpp
Definition: ipmovie.c:87
uint64_t channel_layout
Audio only.
Definition: avcodec.h:3838
#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:646
AVFormatContext * avf
Definition: ipmovie.c:81
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3765
#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:86
#define OPCODE_VIDEO_DATA_06
Definition: ipmovie.c:61
#define OPCODE_INIT_AUDIO_BUFFERS
Definition: ipmovie.c:58
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:214
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
Definition: avcodec.h:1131
#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:190
const char * r
Definition: vf_curves.c:111
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3732
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:4881
uint16_t width
Definition: gdv.c:47
#define OPCODE_SET_SKIP_MAP
Definition: ipmovie.c:69
int video_chunk_size
Definition: ipmovie.c:109
#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
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:637
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:1381
int block_align
Audio only.
Definition: avcodec.h:3853
audio channel layout utility functions
unsigned int audio_bits
Definition: ipmovie.c:97
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
#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_END_OF_STREAM
Definition: ipmovie.c:55
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:528
unsigned char * buf
Definition: ipmovie.c:82
enum AVCodecID audio_type
Definition: ipmovie.c:100
Stream structure.
Definition: avformat.h:872
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
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
#define CHUNK_AUDIO_ONLY
Definition: ipmovie.c:44
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:590
static int init_audio(AVFormatContext *s)
Definition: ipmovie.c:248
static int load_ipmovie_packet(IPMVEContext *s, AVIOContext *pb, AVPacket *pkt)
Definition: ipmovie.c:119
#define OPCODE_INIT_VIDEO_BUFFERS
Definition: ipmovie.c:60
int64_t video_chunk_offset
Definition: ipmovie.c:108
unsigned int video_width
Definition: ipmovie.c:88
int audio_chunk_size
Definition: ipmovie.c:107
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:275
#define OPCODE_AUDIO_FRAME
Definition: ipmovie.c:63
#define OPCODE_VIDEO_DATA_11
Definition: ipmovie.c:72
uint8_t frame_format
Definition: ipmovie.c:95
#define OPCODE_CREATE_TIMER
Definition: ipmovie.c:57
int64_t video_pts
Definition: ipmovie.c:90
int sample_rate
Audio only.
Definition: avcodec.h:3846
#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:103
if(ret< 0)
Definition: vf_mcdeint.c:279
#define OPCODE_VIDEO_DATA_10
Definition: ipmovie.c:71
#define OPCODE_SILENCE_FRAME
Definition: ipmovie.c:64
#define CHUNK_PREAMBLE_SIZE
Definition: ipmovie.c:40
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
AVInputFormat ff_ipmovie_demuxer
Definition: ipmovie.c:729
#define OPCODE_SET_PALETTE
Definition: ipmovie.c:67
unsigned int audio_frame_count
Definition: ipmovie.c:101
void * priv_data
Format private data.
Definition: avformat.h:1353
#define OPCODE_UNKNOWN_15
Definition: ipmovie.c:76
#define CHUNK_NOMEM
Definition: ipmovie.c:51
uint8_t send_buffer
Definition: ipmovie.c:94
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3778
static int ipmovie_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ipmovie.c:701
int channels
Audio only.
Definition: avcodec.h:3842
#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:647
int has_palette
Definition: ipmovie.c:92
#define CHUNK_VIDEO
Definition: ipmovie.c:46
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1014
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:356
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3740
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:329
int stream_index
Definition: avcodec.h:1401
#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:1376
unsigned int audio_sample_rate
Definition: ipmovie.c:99
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1392
int skip_map_chunk_size
Definition: ipmovie.c:111