ipmovie.c@ 7692

Last change on this file since 7692 was 5776, checked in by vboxsync, 17 years ago
ffmpeg: exported to OSE
File size: 20.1 KB

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1	/*
2	* Interplay MVE File Demuxer
3	* Copyright (c) 2003 The ffmpeg Project
4	*
5	* This library is free software; you can redistribute it and/or
6	* modify it under the terms of the GNU Lesser General Public
7	* License as published by the Free Software Foundation; either
8	* version 2 of the License, or (at your option) any later version.
9	*
10	* This library is distributed in the hope that it will be useful,
11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13	* Lesser General Public License for more details.
14	*
15	* You should have received a copy of the GNU Lesser General Public
16	* License along with this library; if not, write to the Free Software
17	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18	*/
19
20	/**
21	* @file ipmovie.c
22	* Interplay MVE file demuxer
23	* by Mike Melanson (melanson@pcisys.net)
24	* For more information regarding the Interplay MVE file format, visit:
25	* http://www.pcisys.net/~melanson/codecs/
26	* The aforementioned site also contains a command line utility for parsing
27	* IP MVE files so that you can get a good idea of the typical structure of
28	* such files. This demuxer is not the best example to use if you are trying
29	* to write your own as it uses a rather roundabout approach for splitting
30	* up and sending out the chunks.
31	*/
32
33	#include "avformat.h"
34
35	/* debugging support: #define DEBUG_IPMOVIE as non-zero to see extremely
36	* verbose information about the demux process */
37	#define DEBUG_IPMOVIE 0
38
39	#if DEBUG_IPMOVIE
40	#define debug_ipmovie printf
41	#else
42	static inline void debug_ipmovie(const char *format, ...) { }
43	#endif
44
45	#define IPMOVIE_SIGNATURE "Interplay MVE File\x1A\0"
46	#define IPMOVIE_SIGNATURE_SIZE 20
47	#define CHUNK_PREAMBLE_SIZE 4
48	#define OPCODE_PREAMBLE_SIZE 4
49
50	#define CHUNK_INIT_AUDIO 0x0000
51	#define CHUNK_AUDIO_ONLY 0x0001
52	#define CHUNK_INIT_VIDEO 0x0002
53	#define CHUNK_VIDEO 0x0003
54	#define CHUNK_SHUTDOWN 0x0004
55	#define CHUNK_END 0x0005
56	/* these last types are used internally */
57	#define CHUNK_DONE 0xFFFC
58	#define CHUNK_NOMEM 0xFFFD
59	#define CHUNK_EOF 0xFFFE
60	#define CHUNK_BAD 0xFFFF
61
62	#define OPCODE_END_OF_STREAM 0x00
63	#define OPCODE_END_OF_CHUNK 0x01
64	#define OPCODE_CREATE_TIMER 0x02
65	#define OPCODE_INIT_AUDIO_BUFFERS 0x03
66	#define OPCODE_START_STOP_AUDIO 0x04
67	#define OPCODE_INIT_VIDEO_BUFFERS 0x05
68	#define OPCODE_UNKNOWN_06 0x06
69	#define OPCODE_SEND_BUFFER 0x07
70	#define OPCODE_AUDIO_FRAME 0x08
71	#define OPCODE_SILENCE_FRAME 0x09
72	#define OPCODE_INIT_VIDEO_MODE 0x0A
73	#define OPCODE_CREATE_GRADIENT 0x0B
74	#define OPCODE_SET_PALETTE 0x0C
75	#define OPCODE_SET_PALETTE_COMPRESSED 0x0D
76	#define OPCODE_UNKNOWN_0E 0x0E
77	#define OPCODE_SET_DECODING_MAP 0x0F
78	#define OPCODE_UNKNOWN_10 0x10
79	#define OPCODE_VIDEO_DATA 0x11
80	#define OPCODE_UNKNOWN_12 0x12
81	#define OPCODE_UNKNOWN_13 0x13
82	#define OPCODE_UNKNOWN_14 0x14
83	#define OPCODE_UNKNOWN_15 0x15
84
85	#define PALETTE_COUNT 256
86
87	typedef struct IPMVEContext {
88
89	unsigned char *buf;
90	int buf_size;
91
92	float fps;
93	int frame_pts_inc;
94
95	unsigned int video_width;
96	unsigned int video_height;
97	int64_t video_pts;
98
99	unsigned int audio_bits;
100	unsigned int audio_channels;
101	unsigned int audio_sample_rate;
102	unsigned int audio_type;
103	unsigned int audio_frame_count;
104
105	int video_stream_index;
106	int audio_stream_index;
107
108	offset_t audio_chunk_offset;
109	int audio_chunk_size;
110	offset_t video_chunk_offset;
111	int video_chunk_size;
112	offset_t decode_map_chunk_offset;
113	int decode_map_chunk_size;
114
115	offset_t next_chunk_offset;
116
117	AVPaletteControl palette_control;
118
119	} IPMVEContext;
120
121	static int load_ipmovie_packet(IPMVEContext s, ByteIOContext pb,
122	AVPacket *pkt) {
123
124	int chunk_type;
125	int64_t audio_pts = 0;
126
127	if (s->audio_chunk_offset) {
128
129	/* adjust for PCM audio by skipping chunk header */
130	if (s->audio_type != CODEC_ID_INTERPLAY_DPCM) {
131	s->audio_chunk_offset += 6;
132	s->audio_chunk_size -= 6;
133	}
134
135	url_fseek(pb, s->audio_chunk_offset, SEEK_SET);
136	s->audio_chunk_offset = 0;
137
138	/* figure out the audio pts */
139	audio_pts = 90000;
140	audio_pts *= s->audio_frame_count;
141	audio_pts /= s->audio_sample_rate;
142
143	if (s->audio_chunk_size != av_get_packet(pb, pkt, s->audio_chunk_size))
144	return CHUNK_EOF;
145
146	pkt->stream_index = s->audio_stream_index;
147	pkt->pts = audio_pts;
148
149	/* audio frame maintenance */
150	if (s->audio_type != CODEC_ID_INTERPLAY_DPCM)
151	s->audio_frame_count +=
152	(s->audio_chunk_size / s->audio_channels / (s->audio_bits / 8));
153	else
154	s->audio_frame_count +=
155	(s->audio_chunk_size - 6) / s->audio_channels;
156
157	debug_ipmovie("sending audio frame with pts %lld (%d audio frames)\n",
158	audio_pts, s->audio_frame_count);
159
160	chunk_type = CHUNK_VIDEO;
161
162	} else if (s->decode_map_chunk_offset) {
163
164	/* send both the decode map and the video data together */
165
166	if (av_new_packet(pkt, s->decode_map_chunk_size + s->video_chunk_size))
167	return CHUNK_NOMEM;
168
169	pkt->pos= s->decode_map_chunk_offset;
170	url_fseek(pb, s->decode_map_chunk_offset, SEEK_SET);
171	s->decode_map_chunk_offset = 0;
172
173	if (get_buffer(pb, pkt->data, s->decode_map_chunk_size) !=
174	s->decode_map_chunk_size) {
175	av_free_packet(pkt);
176	return CHUNK_EOF;
177	}
178
179	url_fseek(pb, s->video_chunk_offset, SEEK_SET);
180	s->video_chunk_offset = 0;
181
182	if (get_buffer(pb, pkt->data + s->decode_map_chunk_size,
183	s->video_chunk_size) != s->video_chunk_size) {
184	av_free_packet(pkt);
185	return CHUNK_EOF;
186	}
187
188	pkt->stream_index = s->video_stream_index;
189	pkt->pts = s->video_pts;
190
191	debug_ipmovie("sending video frame with pts %lld\n",
192	pkt->pts);
193
194	s->video_pts += s->frame_pts_inc;
195
196	chunk_type = CHUNK_VIDEO;
197
198	} else {
199
200	url_fseek(pb, s->next_chunk_offset, SEEK_SET);
201	chunk_type = CHUNK_DONE;
202
203	}
204
205	return chunk_type;
206	}
207
208	/* This function loads and processes a single chunk in an IP movie file.
209	* It returns the type of chunk that was processed. */
210	static int process_ipmovie_chunk(IPMVEContext s, ByteIOContext pb,
211	AVPacket *pkt)
212	{
213	unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
214	int chunk_type;
215	int chunk_size;
216	unsigned char opcode_preamble[OPCODE_PREAMBLE_SIZE];
217	unsigned char opcode_type;
218	unsigned char opcode_version;
219	int opcode_size;
220	unsigned char scratch[1024];
221	int i, j;
222	int first_color, last_color;
223	int audio_flags;
224	unsigned char r, g, b;
225
226	/* see if there are any pending packets */
227	chunk_type = load_ipmovie_packet(s, pb, pkt);
228	if ((chunk_type == CHUNK_VIDEO) && (chunk_type != CHUNK_DONE))
229	return chunk_type;
230
231	/* read the next chunk, wherever the file happens to be pointing */
232	if (url_feof(pb))
233	return CHUNK_EOF;
234	if (get_buffer(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
235	CHUNK_PREAMBLE_SIZE)
236	return CHUNK_BAD;
237	chunk_size = LE_16(&chunk_preamble[0]);
238	chunk_type = LE_16(&chunk_preamble[2]);
239
240	debug_ipmovie("chunk type 0x%04X, 0x%04X bytes: ", chunk_type, chunk_size);
241
242	switch (chunk_type) {
243
244	case CHUNK_INIT_AUDIO:
245	debug_ipmovie("initialize audio\n");
246	break;
247
248	case CHUNK_AUDIO_ONLY:
249	debug_ipmovie("audio only\n");
250	break;
251
252	case CHUNK_INIT_VIDEO:
253	debug_ipmovie("initialize video\n");
254	break;
255
256	case CHUNK_VIDEO:
257	debug_ipmovie("video (and audio)\n");
258	break;
259
260	case CHUNK_SHUTDOWN:
261	debug_ipmovie("shutdown\n");
262	break;
263
264	case CHUNK_END:
265	debug_ipmovie("end\n");
266	break;
267
268	default:
269	debug_ipmovie("invalid chunk\n");
270	chunk_type = CHUNK_BAD;
271	break;
272
273	}
274
275	while ((chunk_size > 0) && (chunk_type != CHUNK_BAD)) {
276
277	/* read the next chunk, wherever the file happens to be pointing */
278	if (url_feof(pb)) {
279	chunk_type = CHUNK_EOF;
280	break;
281	}
282	if (get_buffer(pb, opcode_preamble, CHUNK_PREAMBLE_SIZE) !=
283	CHUNK_PREAMBLE_SIZE) {
284	chunk_type = CHUNK_BAD;
285	break;
286	}
287
288	opcode_size = LE_16(&opcode_preamble[0]);
289	opcode_type = opcode_preamble[2];
290	opcode_version = opcode_preamble[3];
291
292	chunk_size -= OPCODE_PREAMBLE_SIZE;
293	chunk_size -= opcode_size;
294	if (chunk_size < 0) {
295	debug_ipmovie("chunk_size countdown just went negative\n");
296	chunk_type = CHUNK_BAD;
297	break;
298	}
299
300	debug_ipmovie(" opcode type %02X, version %d, 0x%04X bytes: ",
301	opcode_type, opcode_version, opcode_size);
302	switch (opcode_type) {
303
304	case OPCODE_END_OF_STREAM:
305	debug_ipmovie("end of stream\n");
306	url_fseek(pb, opcode_size, SEEK_CUR);
307	break;
308
309	case OPCODE_END_OF_CHUNK:
310	debug_ipmovie("end of chunk\n");
311	url_fseek(pb, opcode_size, SEEK_CUR);
312	break;
313
314	case OPCODE_CREATE_TIMER:
315	debug_ipmovie("create timer\n");
316	if ((opcode_version > 0) \|\| (opcode_size > 6)) {
317	debug_ipmovie("bad create_timer opcode\n");
318	chunk_type = CHUNK_BAD;
319	break;
320	}
321	if (get_buffer(pb, scratch, opcode_size) !=
322	opcode_size) {
323	chunk_type = CHUNK_BAD;
324	break;
325	}
326	s->fps = 1000000.0 / (LE_32(&scratch[0]) * LE_16(&scratch[4]));
327	s->frame_pts_inc = 90000 / s->fps;
328	debug_ipmovie(" %.2f frames/second (timer div = %d, subdiv = %d)\n",
329	s->fps, LE_32(&scratch[0]), LE_16(&scratch[4]));
330	break;
331
332	case OPCODE_INIT_AUDIO_BUFFERS:
333	debug_ipmovie("initialize audio buffers\n");
334	if ((opcode_version > 1) \|\| (opcode_size > 10)) {
335	debug_ipmovie("bad init_audio_buffers opcode\n");
336	chunk_type = CHUNK_BAD;
337	break;
338	}
339	if (get_buffer(pb, scratch, opcode_size) !=
340	opcode_size) {
341	chunk_type = CHUNK_BAD;
342	break;
343	}
344	s->audio_sample_rate = LE_16(&scratch[4]);
345	audio_flags = LE_16(&scratch[2]);
346	/* bit 0 of the flags: 0 = mono, 1 = stereo */
347	s->audio_channels = (audio_flags & 1) + 1;
348	/* bit 1 of the flags: 0 = 8 bit, 1 = 16 bit */
349	s->audio_bits = (((audio_flags >> 1) & 1) + 1) * 8;
350	/* bit 2 indicates compressed audio in version 1 opcode */
351	if ((opcode_version == 1) && (audio_flags & 0x4))
352	s->audio_type = CODEC_ID_INTERPLAY_DPCM;
353	else if (s->audio_bits == 16)
354	s->audio_type = CODEC_ID_PCM_S16LE;
355	else
356	s->audio_type = CODEC_ID_PCM_U8;
357	debug_ipmovie("audio: %d bits, %d Hz, %s, %s format\n",
358	s->audio_bits,
359	s->audio_sample_rate,
360	(s->audio_channels == 2) ? "stereo" : "mono",
361	(s->audio_type == CODEC_ID_INTERPLAY_DPCM) ?
362	"Interplay audio" : "PCM");
363	break;
364
365	case OPCODE_START_STOP_AUDIO:
366	debug_ipmovie("start/stop audio\n");
367	url_fseek(pb, opcode_size, SEEK_CUR);
368	break;
369
370	case OPCODE_INIT_VIDEO_BUFFERS:
371	debug_ipmovie("initialize video buffers\n");
372	if ((opcode_version > 2) \|\| (opcode_size > 8)) {
373	debug_ipmovie("bad init_video_buffers opcode\n");
374	chunk_type = CHUNK_BAD;
375	break;
376	}
377	if (get_buffer(pb, scratch, opcode_size) !=
378	opcode_size) {
379	chunk_type = CHUNK_BAD;
380	break;
381	}
382	s->video_width = LE_16(&scratch[0]) * 8;
383	s->video_height = LE_16(&scratch[2]) * 8;
384	debug_ipmovie("video resolution: %d x %d\n",
385	s->video_width, s->video_height);
386	break;
387
388	case OPCODE_UNKNOWN_06:
389	case OPCODE_UNKNOWN_0E:
390	case OPCODE_UNKNOWN_10:
391	case OPCODE_UNKNOWN_12:
392	case OPCODE_UNKNOWN_13:
393	case OPCODE_UNKNOWN_14:
394	case OPCODE_UNKNOWN_15:
395	debug_ipmovie("unknown (but documented) opcode %02X\n", opcode_type);
396	url_fseek(pb, opcode_size, SEEK_CUR);
397	break;
398
399	case OPCODE_SEND_BUFFER:
400	debug_ipmovie("send buffer\n");
401	url_fseek(pb, opcode_size, SEEK_CUR);
402	break;
403
404	case OPCODE_AUDIO_FRAME:
405	debug_ipmovie("audio frame\n");
406
407	/* log position and move on for now */
408	s->audio_chunk_offset = url_ftell(pb);
409	s->audio_chunk_size = opcode_size;
410	url_fseek(pb, opcode_size, SEEK_CUR);
411	break;
412
413	case OPCODE_SILENCE_FRAME:
414	debug_ipmovie("silence frame\n");
415	url_fseek(pb, opcode_size, SEEK_CUR);
416	break;
417
418	case OPCODE_INIT_VIDEO_MODE:
419	debug_ipmovie("initialize video mode\n");
420	url_fseek(pb, opcode_size, SEEK_CUR);
421	break;
422
423	case OPCODE_CREATE_GRADIENT:
424	debug_ipmovie("create gradient\n");
425	url_fseek(pb, opcode_size, SEEK_CUR);
426	break;
427
428	case OPCODE_SET_PALETTE:
429	debug_ipmovie("set palette\n");
430	/* check for the logical maximum palette size
431	* (3 * 256 + 4 bytes) */
432	if (opcode_size > 0x304) {
433	debug_ipmovie("demux_ipmovie: set_palette opcode too large\n");
434	chunk_type = CHUNK_BAD;
435	break;
436	}
437	if (get_buffer(pb, scratch, opcode_size) != opcode_size) {
438	chunk_type = CHUNK_BAD;
439	break;
440	}
441
442	/* load the palette into internal data structure */
443	first_color = LE_16(&scratch[0]);
444	last_color = first_color + LE_16(&scratch[2]) - 1;
445	/* sanity check (since they are 16 bit values) */
446	if ((first_color > 0xFF) \|\| (last_color > 0xFF)) {
447	debug_ipmovie("demux_ipmovie: set_palette indices out of range (%d -> %d)\n",
448	first_color, last_color);
449	chunk_type = CHUNK_BAD;
450	break;
451	}
452	j = 4; /* offset of first palette data */
453	for (i = first_color; i <= last_color; i++) {
454	/* the palette is stored as a 6-bit VGA palette, thus each
455	* component is shifted up to a 8-bit range */
456	r = scratch[j++] * 4;
457	g = scratch[j++] * 4;
458	b = scratch[j++] * 4;
459	s->palette_control.palette[i] = (r << 16) \| (g << 8) \| (b);
460	}
461	/* indicate a palette change */
462	s->palette_control.palette_changed = 1;
463	break;
464
465	case OPCODE_SET_PALETTE_COMPRESSED:
466	debug_ipmovie("set palette compressed\n");
467	url_fseek(pb, opcode_size, SEEK_CUR);
468	break;
469
470	case OPCODE_SET_DECODING_MAP:
471	debug_ipmovie("set decoding map\n");
472
473	/* log position and move on for now */
474	s->decode_map_chunk_offset = url_ftell(pb);
475	s->decode_map_chunk_size = opcode_size;
476	url_fseek(pb, opcode_size, SEEK_CUR);
477	break;
478
479	case OPCODE_VIDEO_DATA:
480	debug_ipmovie("set video data\n");
481
482	/* log position and move on for now */
483	s->video_chunk_offset = url_ftell(pb);
484	s->video_chunk_size = opcode_size;
485	url_fseek(pb, opcode_size, SEEK_CUR);
486	break;
487
488	default:
489	debug_ipmovie("*** unknown opcode type\n");
490	chunk_type = CHUNK_BAD;
491	break;
492
493	}
494	}
495
496	/* make a note of where the stream is sitting */
497	s->next_chunk_offset = url_ftell(pb);
498
499	/* dispatch the first of any pending packets */
500	if ((chunk_type == CHUNK_VIDEO) \|\| (chunk_type == CHUNK_AUDIO_ONLY))
501	chunk_type = load_ipmovie_packet(s, pb, pkt);
502
503	return chunk_type;
504	}
505
506	static int ipmovie_probe(AVProbeData *p)
507	{
508	if (p->buf_size < IPMOVIE_SIGNATURE_SIZE)
509	return 0;
510	if (strncmp(p->buf, IPMOVIE_SIGNATURE, IPMOVIE_SIGNATURE_SIZE) != 0)
511	return 0;
512
513	return AVPROBE_SCORE_MAX;
514	}
515
516	static int ipmovie_read_header(AVFormatContext *s,
517	AVFormatParameters *ap)
518	{
519	IPMVEContext ipmovie = (IPMVEContext )s->priv_data;
520	ByteIOContext *pb = &s->pb;
521	AVPacket pkt;
522	AVStream *st;
523	unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
524	int chunk_type;
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
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)
542	return AVERROR_IO;
543	chunk_type = LE_16(&chunk_preamble[2]);
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)
549	return AVERROR_INVALIDDATA;
550
551	/* initialize the stream decoders */
552	st = av_new_stream(s, 0);
553	if (!st)
554	return AVERROR_NOMEM;
555	av_set_pts_info(st, 33, 1, 90000);
556	ipmovie->video_stream_index = st->index;
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;
562
563	/* palette considerations */
564	st->codec->palctrl = &ipmovie->palette_control;
565
566	if (ipmovie->audio_type) {
567	st = av_new_stream(s, 0);
568	if (!st)
569	return AVERROR_NOMEM;
570	av_set_pts_info(st, 33, 1, 90000);
571	ipmovie->audio_stream_index = st->index;
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;
583	}
584
585	return 0;
586	}
587
588	static int ipmovie_read_packet(AVFormatContext *s,
589	AVPacket *pkt)
590	{
591	IPMVEContext ipmovie = (IPMVEContext )s->priv_data;
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)
599	ret = AVERROR_IO;
600	else if (ret == CHUNK_NOMEM)
601	ret = AVERROR_NOMEM;
602	else
603	ret = 0;
604
605	return ret;
606	}
607
608	static int ipmovie_read_close(AVFormatContext *s)
609	{
610	// IPMVEContext ipmovie = (IPMVEContext )s->priv_data;
611
612	return 0;
613	}
614
615	static AVInputFormat ipmovie_demuxer = {
616	"ipmovie",
617	"Interplay MVE format",
618	sizeof(IPMVEContext),
619	ipmovie_probe,
620	ipmovie_read_header,
621	ipmovie_read_packet,
622	ipmovie_read_close,
623	};
624
625	int ipmovie_init(void)
626	{
627	av_register_input_format(&ipmovie_demuxer);
628	return 0;
629	}
630

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source: vbox/trunk/src/libs/ffmpeg-20060710/libavformat/ipmovie.c@ 7692

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