cosmetics: indentation
[libav.git] / libavformat / ipmovie.c
CommitLineData
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1/*
2 * Interplay MVE File Demuxer
3 * Copyright (c) 2003 The ffmpeg Project
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
3ef8be2b 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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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
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 */
21
22/**
23 * @file ipmovie.c
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
35#include "avformat.h"
36
37/* debugging support: #define DEBUG_IPMOVIE as non-zero to see extremely
38 * verbose information about the demux process */
9be653d0 39#define DEBUG_IPMOVIE 0
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40
41#if DEBUG_IPMOVIE
42#define debug_ipmovie printf
43#else
44static inline void debug_ipmovie(const char *format, ...) { }
45#endif
46
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47#define IPMOVIE_SIGNATURE "Interplay MVE File\x1A\0"
48#define IPMOVIE_SIGNATURE_SIZE 20
49#define CHUNK_PREAMBLE_SIZE 4
50#define OPCODE_PREAMBLE_SIZE 4
51
52#define CHUNK_INIT_AUDIO 0x0000
53#define CHUNK_AUDIO_ONLY 0x0001
54#define CHUNK_INIT_VIDEO 0x0002
55#define CHUNK_VIDEO 0x0003
56#define CHUNK_SHUTDOWN 0x0004
57#define CHUNK_END 0x0005
58/* these last types are used internally */
59#define CHUNK_DONE 0xFFFC
60#define CHUNK_NOMEM 0xFFFD
61#define CHUNK_EOF 0xFFFE
62#define CHUNK_BAD 0xFFFF
63
64#define OPCODE_END_OF_STREAM 0x00
65#define OPCODE_END_OF_CHUNK 0x01
66#define OPCODE_CREATE_TIMER 0x02
67#define OPCODE_INIT_AUDIO_BUFFERS 0x03
68#define OPCODE_START_STOP_AUDIO 0x04
69#define OPCODE_INIT_VIDEO_BUFFERS 0x05
70#define OPCODE_UNKNOWN_06 0x06
71#define OPCODE_SEND_BUFFER 0x07
72#define OPCODE_AUDIO_FRAME 0x08
73#define OPCODE_SILENCE_FRAME 0x09
74#define OPCODE_INIT_VIDEO_MODE 0x0A
75#define OPCODE_CREATE_GRADIENT 0x0B
76#define OPCODE_SET_PALETTE 0x0C
77#define OPCODE_SET_PALETTE_COMPRESSED 0x0D
78#define OPCODE_UNKNOWN_0E 0x0E
79#define OPCODE_SET_DECODING_MAP 0x0F
80#define OPCODE_UNKNOWN_10 0x10
81#define OPCODE_VIDEO_DATA 0x11
82#define OPCODE_UNKNOWN_12 0x12
83#define OPCODE_UNKNOWN_13 0x13
84#define OPCODE_UNKNOWN_14 0x14
85#define OPCODE_UNKNOWN_15 0x15
86
87#define PALETTE_COUNT 256
88
89typedef struct IPMVEContext {
90
91 unsigned char *buf;
92 int buf_size;
93
dda61423 94 float fps;
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95 int frame_pts_inc;
96
97 unsigned int video_width;
98 unsigned int video_height;
99 int64_t video_pts;
100
101 unsigned int audio_bits;
102 unsigned int audio_channels;
103 unsigned int audio_sample_rate;
104 unsigned int audio_type;
105 unsigned int audio_frame_count;
106
107 int video_stream_index;
108 int audio_stream_index;
109
110 offset_t audio_chunk_offset;
111 int audio_chunk_size;
112 offset_t video_chunk_offset;
113 int video_chunk_size;
114 offset_t decode_map_chunk_offset;
115 int decode_map_chunk_size;
116
117 offset_t next_chunk_offset;
118
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119 AVPaletteControl palette_control;
120
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121} IPMVEContext;
122
115329f1 123static int load_ipmovie_packet(IPMVEContext *s, ByteIOContext *pb,
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124 AVPacket *pkt) {
125
126 int chunk_type;
127 int64_t audio_pts = 0;
128
129 if (s->audio_chunk_offset) {
130
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131 /* adjust for PCM audio by skipping chunk header */
132 if (s->audio_type != CODEC_ID_INTERPLAY_DPCM) {
133 s->audio_chunk_offset += 6;
134 s->audio_chunk_size -= 6;
135 }
136
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137 url_fseek(pb, s->audio_chunk_offset, SEEK_SET);
138 s->audio_chunk_offset = 0;
139
140 /* figure out the audio pts */
141 audio_pts = 90000;
142 audio_pts *= s->audio_frame_count;
143 audio_pts /= s->audio_sample_rate;
144
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145 if (s->audio_chunk_size != av_get_packet(pb, pkt, s->audio_chunk_size))
146 return CHUNK_EOF;
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147
148 pkt->stream_index = s->audio_stream_index;
149 pkt->pts = audio_pts;
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150
151 /* audio frame maintenance */
152 if (s->audio_type != CODEC_ID_INTERPLAY_DPCM)
153 s->audio_frame_count +=
154 (s->audio_chunk_size / s->audio_channels / (s->audio_bits / 8));
155 else
156 s->audio_frame_count +=
157 (s->audio_chunk_size - 6) / s->audio_channels;
158
949b1a13 159 debug_ipmovie("sending audio frame with pts %"PRId64" (%d audio frames)\n",
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160 audio_pts, s->audio_frame_count);
161
162 chunk_type = CHUNK_VIDEO;
163
164 } else if (s->decode_map_chunk_offset) {
165
b76c707a 166 /* send both the decode map and the video data together */
3ef8be2b 167
b76c707a 168 if (av_new_packet(pkt, s->decode_map_chunk_size + s->video_chunk_size))
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169 return CHUNK_NOMEM;
170
2692067a 171 pkt->pos= s->decode_map_chunk_offset;
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172 url_fseek(pb, s->decode_map_chunk_offset, SEEK_SET);
173 s->decode_map_chunk_offset = 0;
174
115329f1 175 if (get_buffer(pb, pkt->data, s->decode_map_chunk_size) !=
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176 s->decode_map_chunk_size) {
177 av_free_packet(pkt);
178 return CHUNK_EOF;
179 }
180
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181 url_fseek(pb, s->video_chunk_offset, SEEK_SET);
182 s->video_chunk_offset = 0;
183
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184 if (get_buffer(pb, pkt->data + s->decode_map_chunk_size,
185 s->video_chunk_size) != s->video_chunk_size) {
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186 av_free_packet(pkt);
187 return CHUNK_EOF;
188 }
189
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190 pkt->stream_index = s->video_stream_index;
191 pkt->pts = s->video_pts;
192
949b1a13 193 debug_ipmovie("sending video frame with pts %"PRId64"\n",
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194 pkt->pts);
195
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196 s->video_pts += s->frame_pts_inc;
197
198 chunk_type = CHUNK_VIDEO;
199
200 } else {
201
202 url_fseek(pb, s->next_chunk_offset, SEEK_SET);
203 chunk_type = CHUNK_DONE;
204
205 }
206
207 return chunk_type;
208}
209
210/* This function loads and processes a single chunk in an IP movie file.
211 * It returns the type of chunk that was processed. */
115329f1 212static int process_ipmovie_chunk(IPMVEContext *s, ByteIOContext *pb,
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213 AVPacket *pkt)
214{
215 unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
216 int chunk_type;
217 int chunk_size;
218 unsigned char opcode_preamble[OPCODE_PREAMBLE_SIZE];
219 unsigned char opcode_type;
220 unsigned char opcode_version;
221 int opcode_size;
222 unsigned char scratch[1024];
b76c707a 223 int i, j;
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224 int first_color, last_color;
225 int audio_flags;
2a2bbcb0 226 unsigned char r, g, b;
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227
228 /* see if there are any pending packets */
229 chunk_type = load_ipmovie_packet(s, pb, pkt);
49c8132b 230 if (chunk_type != CHUNK_DONE)
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231 return chunk_type;
232
233 /* read the next chunk, wherever the file happens to be pointing */
234 if (url_feof(pb))
235 return CHUNK_EOF;
236 if (get_buffer(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
237 CHUNK_PREAMBLE_SIZE)
238 return CHUNK_BAD;
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239 chunk_size = AV_RL16(&chunk_preamble[0]);
240 chunk_type = AV_RL16(&chunk_preamble[2]);
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241
242 debug_ipmovie("chunk type 0x%04X, 0x%04X bytes: ", chunk_type, chunk_size);
243
244 switch (chunk_type) {
245
246 case CHUNK_INIT_AUDIO:
247 debug_ipmovie("initialize audio\n");
248 break;
249
250 case CHUNK_AUDIO_ONLY:
251 debug_ipmovie("audio only\n");
252 break;
253
254 case CHUNK_INIT_VIDEO:
255 debug_ipmovie("initialize video\n");
256 break;
257
258 case CHUNK_VIDEO:
259 debug_ipmovie("video (and audio)\n");
260 break;
261
262 case CHUNK_SHUTDOWN:
263 debug_ipmovie("shutdown\n");
264 break;
265
266 case CHUNK_END:
267 debug_ipmovie("end\n");
268 break;
269
270 default:
271 debug_ipmovie("invalid chunk\n");
272 chunk_type = CHUNK_BAD;
273 break;
274
275 }
276
277 while ((chunk_size > 0) && (chunk_type != CHUNK_BAD)) {
278
279 /* read the next chunk, wherever the file happens to be pointing */
280 if (url_feof(pb)) {
281 chunk_type = CHUNK_EOF;
282 break;
283 }
284 if (get_buffer(pb, opcode_preamble, CHUNK_PREAMBLE_SIZE) !=
285 CHUNK_PREAMBLE_SIZE) {
286 chunk_type = CHUNK_BAD;
287 break;
288 }
289
fead30d4 290 opcode_size = AV_RL16(&opcode_preamble[0]);
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291 opcode_type = opcode_preamble[2];
292 opcode_version = opcode_preamble[3];
293
294 chunk_size -= OPCODE_PREAMBLE_SIZE;
295 chunk_size -= opcode_size;
296 if (chunk_size < 0) {
297 debug_ipmovie("chunk_size countdown just went negative\n");
298 chunk_type = CHUNK_BAD;
299 break;
300 }
301
302 debug_ipmovie(" opcode type %02X, version %d, 0x%04X bytes: ",
303 opcode_type, opcode_version, opcode_size);
304 switch (opcode_type) {
305
306 case OPCODE_END_OF_STREAM:
307 debug_ipmovie("end of stream\n");
308 url_fseek(pb, opcode_size, SEEK_CUR);
309 break;
310
311 case OPCODE_END_OF_CHUNK:
312 debug_ipmovie("end of chunk\n");
313 url_fseek(pb, opcode_size, SEEK_CUR);
314 break;
315
316 case OPCODE_CREATE_TIMER:
317 debug_ipmovie("create timer\n");
318 if ((opcode_version > 0) || (opcode_size > 6)) {
319 debug_ipmovie("bad create_timer opcode\n");
320 chunk_type = CHUNK_BAD;
321 break;
322 }
323 if (get_buffer(pb, scratch, opcode_size) !=
324 opcode_size) {
325 chunk_type = CHUNK_BAD;
326 break;
327 }
fead30d4 328 s->fps = 1000000.0 / (AV_RL32(&scratch[0]) * AV_RL16(&scratch[4]));
3ef8be2b 329 s->frame_pts_inc = 90000 / s->fps;
dda61423 330 debug_ipmovie(" %.2f frames/second (timer div = %d, subdiv = %d)\n",
fead30d4 331 s->fps, AV_RL32(&scratch[0]), AV_RL16(&scratch[4]));
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332 break;
333
334 case OPCODE_INIT_AUDIO_BUFFERS:
335 debug_ipmovie("initialize audio buffers\n");
336 if ((opcode_version > 1) || (opcode_size > 10)) {
337 debug_ipmovie("bad init_audio_buffers opcode\n");
338 chunk_type = CHUNK_BAD;
339 break;
340 }
341 if (get_buffer(pb, scratch, opcode_size) !=
342 opcode_size) {
343 chunk_type = CHUNK_BAD;
344 break;
345 }
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346 s->audio_sample_rate = AV_RL16(&scratch[4]);
347 audio_flags = AV_RL16(&scratch[2]);
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348 /* bit 0 of the flags: 0 = mono, 1 = stereo */
349 s->audio_channels = (audio_flags & 1) + 1;
350 /* bit 1 of the flags: 0 = 8 bit, 1 = 16 bit */
351 s->audio_bits = (((audio_flags >> 1) & 1) + 1) * 8;
352 /* bit 2 indicates compressed audio in version 1 opcode */
353 if ((opcode_version == 1) && (audio_flags & 0x4))
354 s->audio_type = CODEC_ID_INTERPLAY_DPCM;
355 else if (s->audio_bits == 16)
356 s->audio_type = CODEC_ID_PCM_S16LE;
357 else
358 s->audio_type = CODEC_ID_PCM_U8;
359 debug_ipmovie("audio: %d bits, %d Hz, %s, %s format\n",
360 s->audio_bits,
361 s->audio_sample_rate,
362 (s->audio_channels == 2) ? "stereo" : "mono",
115329f1 363 (s->audio_type == CODEC_ID_INTERPLAY_DPCM) ?
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364 "Interplay audio" : "PCM");
365 break;
366
367 case OPCODE_START_STOP_AUDIO:
368 debug_ipmovie("start/stop audio\n");
369 url_fseek(pb, opcode_size, SEEK_CUR);
370 break;
371
372 case OPCODE_INIT_VIDEO_BUFFERS:
373 debug_ipmovie("initialize video buffers\n");
374 if ((opcode_version > 2) || (opcode_size > 8)) {
375 debug_ipmovie("bad init_video_buffers opcode\n");
376 chunk_type = CHUNK_BAD;
377 break;
378 }
379 if (get_buffer(pb, scratch, opcode_size) !=
380 opcode_size) {
381 chunk_type = CHUNK_BAD;
382 break;
383 }
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384 s->video_width = AV_RL16(&scratch[0]) * 8;
385 s->video_height = AV_RL16(&scratch[2]) * 8;
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386 debug_ipmovie("video resolution: %d x %d\n",
387 s->video_width, s->video_height);
388 break;
389
390 case OPCODE_UNKNOWN_06:
391 case OPCODE_UNKNOWN_0E:
392 case OPCODE_UNKNOWN_10:
393 case OPCODE_UNKNOWN_12:
394 case OPCODE_UNKNOWN_13:
395 case OPCODE_UNKNOWN_14:
396 case OPCODE_UNKNOWN_15:
397 debug_ipmovie("unknown (but documented) opcode %02X\n", opcode_type);
398 url_fseek(pb, opcode_size, SEEK_CUR);
399 break;
400
401 case OPCODE_SEND_BUFFER:
402 debug_ipmovie("send buffer\n");
403 url_fseek(pb, opcode_size, SEEK_CUR);
404 break;
405
406 case OPCODE_AUDIO_FRAME:
407 debug_ipmovie("audio frame\n");
408
409 /* log position and move on for now */
410 s->audio_chunk_offset = url_ftell(pb);
411 s->audio_chunk_size = opcode_size;
412 url_fseek(pb, opcode_size, SEEK_CUR);
413 break;
414
415 case OPCODE_SILENCE_FRAME:
416 debug_ipmovie("silence frame\n");
417 url_fseek(pb, opcode_size, SEEK_CUR);
418 break;
419
420 case OPCODE_INIT_VIDEO_MODE:
421 debug_ipmovie("initialize video mode\n");
422 url_fseek(pb, opcode_size, SEEK_CUR);
423 break;
424
425 case OPCODE_CREATE_GRADIENT:
426 debug_ipmovie("create gradient\n");
427 url_fseek(pb, opcode_size, SEEK_CUR);
428 break;
429
430 case OPCODE_SET_PALETTE:
431 debug_ipmovie("set palette\n");
432 /* check for the logical maximum palette size
433 * (3 * 256 + 4 bytes) */
434 if (opcode_size > 0x304) {
435 debug_ipmovie("demux_ipmovie: set_palette opcode too large\n");
436 chunk_type = CHUNK_BAD;
437 break;
438 }
439 if (get_buffer(pb, scratch, opcode_size) != opcode_size) {
440 chunk_type = CHUNK_BAD;
441 break;
442 }
443
444 /* load the palette into internal data structure */
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445 first_color = AV_RL16(&scratch[0]);
446 last_color = first_color + AV_RL16(&scratch[2]) - 1;
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447 /* sanity check (since they are 16 bit values) */
448 if ((first_color > 0xFF) || (last_color > 0xFF)) {
449 debug_ipmovie("demux_ipmovie: set_palette indices out of range (%d -> %d)\n",
450 first_color, last_color);
451 chunk_type = CHUNK_BAD;
452 break;
453 }
454 j = 4; /* offset of first palette data */
3ef8be2b 455 for (i = first_color; i <= last_color; i++) {
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456 /* the palette is stored as a 6-bit VGA palette, thus each
457 * component is shifted up to a 8-bit range */
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458 r = scratch[j++] * 4;
459 g = scratch[j++] * 4;
460 b = scratch[j++] * 4;
461 s->palette_control.palette[i] = (r << 16) | (g << 8) | (b);
3ef8be2b 462 }
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463 /* indicate a palette change */
464 s->palette_control.palette_changed = 1;
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465 break;
466
467 case OPCODE_SET_PALETTE_COMPRESSED:
468 debug_ipmovie("set palette compressed\n");
469 url_fseek(pb, opcode_size, SEEK_CUR);
470 break;
471
472 case OPCODE_SET_DECODING_MAP:
473 debug_ipmovie("set decoding map\n");
474
475 /* log position and move on for now */
476 s->decode_map_chunk_offset = url_ftell(pb);
477 s->decode_map_chunk_size = opcode_size;
478 url_fseek(pb, opcode_size, SEEK_CUR);
479 break;
480
481 case OPCODE_VIDEO_DATA:
482 debug_ipmovie("set video data\n");
483
484 /* log position and move on for now */
485 s->video_chunk_offset = url_ftell(pb);
486 s->video_chunk_size = opcode_size;
487 url_fseek(pb, opcode_size, SEEK_CUR);
488 break;
489
490 default:
491 debug_ipmovie("*** unknown opcode type\n");
492 chunk_type = CHUNK_BAD;
493 break;
494
495 }
496 }
497
498 /* make a note of where the stream is sitting */
499 s->next_chunk_offset = url_ftell(pb);
500
501 /* dispatch the first of any pending packets */
502 if ((chunk_type == CHUNK_VIDEO) || (chunk_type == CHUNK_AUDIO_ONLY))
503 chunk_type = load_ipmovie_packet(s, pb, pkt);
504
505 return chunk_type;
506}
507
508static int ipmovie_probe(AVProbeData *p)
509{
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510 if (strncmp(p->buf, IPMOVIE_SIGNATURE, IPMOVIE_SIGNATURE_SIZE) != 0)
511 return 0;
512
513 return AVPROBE_SCORE_MAX;
514}
515
516static int ipmovie_read_header(AVFormatContext *s,
517 AVFormatParameters *ap)
518{
e4141433 519 IPMVEContext *ipmovie = s->priv_data;
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520 ByteIOContext *pb = &s->pb;
521 AVPacket pkt;
522 AVStream *st;
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523 unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
524 int chunk_type;
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525
526 /* initialize private context members */
527 ipmovie->video_pts = ipmovie->audio_frame_count = 0;
528 ipmovie->audio_chunk_offset = ipmovie->video_chunk_offset =
529 ipmovie->decode_map_chunk_offset = 0;
530
531 /* on the first read, this will position the stream at the first chunk */
532 ipmovie->next_chunk_offset = IPMOVIE_SIGNATURE_SIZE + 6;
533
534 /* process the first chunk which should be CHUNK_INIT_VIDEO */
535 if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_VIDEO)
536 return AVERROR_INVALIDDATA;
537
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538 /* peek ahead to the next chunk-- if it is an init audio chunk, process
539 * it; if it is the first video chunk, this is a silent file */
540 if (get_buffer(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
541 CHUNK_PREAMBLE_SIZE)
0bd586c5 542 return AVERROR_IO;
fead30d4 543 chunk_type = AV_RL16(&chunk_preamble[2]);
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544 url_fseek(pb, -CHUNK_PREAMBLE_SIZE, SEEK_CUR);
545
546 if (chunk_type == CHUNK_VIDEO)
547 ipmovie->audio_type = 0; /* no audio */
548 else if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_AUDIO)
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549 return AVERROR_INVALIDDATA;
550
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551 /* initialize the stream decoders */
552 st = av_new_stream(s, 0);
553 if (!st)
554 return AVERROR_NOMEM;
9ee91c2f 555 av_set_pts_info(st, 33, 1, 90000);
3ef8be2b 556 ipmovie->video_stream_index = st->index;
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557 st->codec->codec_type = CODEC_TYPE_VIDEO;
558 st->codec->codec_id = CODEC_ID_INTERPLAY_VIDEO;
559 st->codec->codec_tag = 0; /* no fourcc */
560 st->codec->width = ipmovie->video_width;
561 st->codec->height = ipmovie->video_height;
3ef8be2b 562
b76c707a 563 /* palette considerations */
01f4895c 564 st->codec->palctrl = &ipmovie->palette_control;
b76c707a 565
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566 if (ipmovie->audio_type) {
567 st = av_new_stream(s, 0);
568 if (!st)
569 return AVERROR_NOMEM;
9ee91c2f 570 av_set_pts_info(st, 33, 1, 90000);
dda61423 571 ipmovie->audio_stream_index = st->index;
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572 st->codec->codec_type = CODEC_TYPE_AUDIO;
573 st->codec->codec_id = ipmovie->audio_type;
574 st->codec->codec_tag = 0; /* no tag */
575 st->codec->channels = ipmovie->audio_channels;
576 st->codec->sample_rate = ipmovie->audio_sample_rate;
577 st->codec->bits_per_sample = ipmovie->audio_bits;
578 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
579 st->codec->bits_per_sample;
580 if (st->codec->codec_id == CODEC_ID_INTERPLAY_DPCM)
581 st->codec->bit_rate /= 2;
582 st->codec->block_align = st->codec->channels * st->codec->bits_per_sample;
dda61423 583 }
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584
585 return 0;
586}
587
588static int ipmovie_read_packet(AVFormatContext *s,
589 AVPacket *pkt)
590{
e4141433 591 IPMVEContext *ipmovie = s->priv_data;
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592 ByteIOContext *pb = &s->pb;
593 int ret;
594
595 ret = process_ipmovie_chunk(ipmovie, pb, pkt);
596 if (ret == CHUNK_BAD)
597 ret = AVERROR_INVALIDDATA;
598 else if (ret == CHUNK_EOF)
0bd586c5 599 ret = AVERROR_IO;
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600 else if (ret == CHUNK_NOMEM)
601 ret = AVERROR_NOMEM;
49c8132b 602 else if (ret == CHUNK_VIDEO)
3ef8be2b 603 ret = 0;
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604 else
605 ret = -1;
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606
607 return ret;
608}
609
610static int ipmovie_read_close(AVFormatContext *s)
611{
e4141433 612// IPMVEContext *ipmovie = s->priv_data;
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613
614 return 0;
615}
616
ff70e601 617AVInputFormat ipmovie_demuxer = {
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618 "ipmovie",
619 "Interplay MVE format",
620 sizeof(IPMVEContext),
621 ipmovie_probe,
622 ipmovie_read_header,
623 ipmovie_read_packet,
624 ipmovie_read_close,
625};