the correct data type is offset_t
[libav.git] / libavformat / ipmovie.c
CommitLineData
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
42static inline void debug_ipmovie(const char *format, ...) { }
43#endif
44
45
46#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
47#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
48 (((uint8_t*)(x))[2] << 16) | \
49 (((uint8_t*)(x))[1] << 8) | \
50 ((uint8_t*)(x))[0])
51
52#define IPMOVIE_SIGNATURE "Interplay MVE File\x1A\0"
53#define IPMOVIE_SIGNATURE_SIZE 20
54#define CHUNK_PREAMBLE_SIZE 4
55#define OPCODE_PREAMBLE_SIZE 4
56
57#define CHUNK_INIT_AUDIO 0x0000
58#define CHUNK_AUDIO_ONLY 0x0001
59#define CHUNK_INIT_VIDEO 0x0002
60#define CHUNK_VIDEO 0x0003
61#define CHUNK_SHUTDOWN 0x0004
62#define CHUNK_END 0x0005
63/* these last types are used internally */
64#define CHUNK_DONE 0xFFFC
65#define CHUNK_NOMEM 0xFFFD
66#define CHUNK_EOF 0xFFFE
67#define CHUNK_BAD 0xFFFF
68
69#define OPCODE_END_OF_STREAM 0x00
70#define OPCODE_END_OF_CHUNK 0x01
71#define OPCODE_CREATE_TIMER 0x02
72#define OPCODE_INIT_AUDIO_BUFFERS 0x03
73#define OPCODE_START_STOP_AUDIO 0x04
74#define OPCODE_INIT_VIDEO_BUFFERS 0x05
75#define OPCODE_UNKNOWN_06 0x06
76#define OPCODE_SEND_BUFFER 0x07
77#define OPCODE_AUDIO_FRAME 0x08
78#define OPCODE_SILENCE_FRAME 0x09
79#define OPCODE_INIT_VIDEO_MODE 0x0A
80#define OPCODE_CREATE_GRADIENT 0x0B
81#define OPCODE_SET_PALETTE 0x0C
82#define OPCODE_SET_PALETTE_COMPRESSED 0x0D
83#define OPCODE_UNKNOWN_0E 0x0E
84#define OPCODE_SET_DECODING_MAP 0x0F
85#define OPCODE_UNKNOWN_10 0x10
86#define OPCODE_VIDEO_DATA 0x11
87#define OPCODE_UNKNOWN_12 0x12
88#define OPCODE_UNKNOWN_13 0x13
89#define OPCODE_UNKNOWN_14 0x14
90#define OPCODE_UNKNOWN_15 0x15
91
92#define PALETTE_COUNT 256
93
94typedef struct IPMVEContext {
95
96 unsigned char *buf;
97 int buf_size;
98
99 int fps;
100 int frame_pts_inc;
101
102 unsigned int video_width;
103 unsigned int video_height;
104 int64_t video_pts;
105
106 unsigned int audio_bits;
107 unsigned int audio_channels;
108 unsigned int audio_sample_rate;
109 unsigned int audio_type;
110 unsigned int audio_frame_count;
111
112 int video_stream_index;
113 int audio_stream_index;
114
115 offset_t audio_chunk_offset;
116 int audio_chunk_size;
117 offset_t video_chunk_offset;
118 int video_chunk_size;
119 offset_t decode_map_chunk_offset;
120 int decode_map_chunk_size;
121
122 offset_t next_chunk_offset;
123
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124 AVPaletteControl palette_control;
125
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126} IPMVEContext;
127
128static int load_ipmovie_packet(IPMVEContext *s, ByteIOContext *pb,
129 AVPacket *pkt) {
130
131 int chunk_type;
132 int64_t audio_pts = 0;
133
134 if (s->audio_chunk_offset) {
135
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136 /* adjust for PCM audio by skipping chunk header */
137 if (s->audio_type != CODEC_ID_INTERPLAY_DPCM) {
138 s->audio_chunk_offset += 6;
139 s->audio_chunk_size -= 6;
140 }
141
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142 url_fseek(pb, s->audio_chunk_offset, SEEK_SET);
143 s->audio_chunk_offset = 0;
144
145 /* figure out the audio pts */
146 audio_pts = 90000;
147 audio_pts *= s->audio_frame_count;
148 audio_pts /= s->audio_sample_rate;
149
150 if (av_new_packet(pkt, s->audio_chunk_size))
151 return CHUNK_NOMEM;
152
153 pkt->stream_index = s->audio_stream_index;
154 pkt->pts = audio_pts;
155 if (get_buffer(pb, pkt->data, s->audio_chunk_size) !=
156 s->audio_chunk_size) {
157 av_free_packet(pkt);
158 return CHUNK_EOF;
159 }
160
161 /* audio frame maintenance */
162 if (s->audio_type != CODEC_ID_INTERPLAY_DPCM)
163 s->audio_frame_count +=
164 (s->audio_chunk_size / s->audio_channels / (s->audio_bits / 8));
165 else
166 s->audio_frame_count +=
167 (s->audio_chunk_size - 6) / s->audio_channels;
168
169 debug_ipmovie("sending audio frame with pts %lld (%d audio frames)\n",
170 audio_pts, s->audio_frame_count);
171
172 chunk_type = CHUNK_VIDEO;
173
174 } else if (s->decode_map_chunk_offset) {
175
b76c707a 176 /* send both the decode map and the video data together */
3ef8be2b 177
b76c707a 178 if (av_new_packet(pkt, s->decode_map_chunk_size + s->video_chunk_size))
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179 return CHUNK_NOMEM;
180
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181 url_fseek(pb, s->decode_map_chunk_offset, SEEK_SET);
182 s->decode_map_chunk_offset = 0;
183
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184 if (get_buffer(pb, pkt->data, s->decode_map_chunk_size) !=
185 s->decode_map_chunk_size) {
186 av_free_packet(pkt);
187 return CHUNK_EOF;
188 }
189
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190 url_fseek(pb, s->video_chunk_offset, SEEK_SET);
191 s->video_chunk_offset = 0;
192
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193 if (get_buffer(pb, pkt->data + s->decode_map_chunk_size,
194 s->video_chunk_size) != s->video_chunk_size) {
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195 av_free_packet(pkt);
196 return CHUNK_EOF;
197 }
198
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199 pkt->stream_index = s->video_stream_index;
200 pkt->pts = s->video_pts;
201
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202 s->video_pts += s->frame_pts_inc;
203
204 chunk_type = CHUNK_VIDEO;
205
206 } else {
207
208 url_fseek(pb, s->next_chunk_offset, SEEK_SET);
209 chunk_type = CHUNK_DONE;
210
211 }
212
213 return chunk_type;
214}
215
216/* This function loads and processes a single chunk in an IP movie file.
217 * It returns the type of chunk that was processed. */
218static int process_ipmovie_chunk(IPMVEContext *s, ByteIOContext *pb,
219 AVPacket *pkt)
220{
221 unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
222 int chunk_type;
223 int chunk_size;
224 unsigned char opcode_preamble[OPCODE_PREAMBLE_SIZE];
225 unsigned char opcode_type;
226 unsigned char opcode_version;
227 int opcode_size;
228 unsigned char scratch[1024];
b76c707a 229 int i, j;
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230 int first_color, last_color;
231 int audio_flags;
232
233 /* see if there are any pending packets */
234 chunk_type = load_ipmovie_packet(s, pb, pkt);
235 if ((chunk_type == CHUNK_VIDEO) && (chunk_type != CHUNK_DONE))
236 return chunk_type;
237
238 /* read the next chunk, wherever the file happens to be pointing */
239 if (url_feof(pb))
240 return CHUNK_EOF;
241 if (get_buffer(pb, chunk_preamble, CHUNK_PREAMBLE_SIZE) !=
242 CHUNK_PREAMBLE_SIZE)
243 return CHUNK_BAD;
244 chunk_size = LE_16(&chunk_preamble[0]);
245 chunk_type = LE_16(&chunk_preamble[2]);
246
247 debug_ipmovie("chunk type 0x%04X, 0x%04X bytes: ", chunk_type, chunk_size);
248
249 switch (chunk_type) {
250
251 case CHUNK_INIT_AUDIO:
252 debug_ipmovie("initialize audio\n");
253 break;
254
255 case CHUNK_AUDIO_ONLY:
256 debug_ipmovie("audio only\n");
257 break;
258
259 case CHUNK_INIT_VIDEO:
260 debug_ipmovie("initialize video\n");
261 break;
262
263 case CHUNK_VIDEO:
264 debug_ipmovie("video (and audio)\n");
265 break;
266
267 case CHUNK_SHUTDOWN:
268 debug_ipmovie("shutdown\n");
269 break;
270
271 case CHUNK_END:
272 debug_ipmovie("end\n");
273 break;
274
275 default:
276 debug_ipmovie("invalid chunk\n");
277 chunk_type = CHUNK_BAD;
278 break;
279
280 }
281
282 while ((chunk_size > 0) && (chunk_type != CHUNK_BAD)) {
283
284 /* read the next chunk, wherever the file happens to be pointing */
285 if (url_feof(pb)) {
286 chunk_type = CHUNK_EOF;
287 break;
288 }
289 if (get_buffer(pb, opcode_preamble, CHUNK_PREAMBLE_SIZE) !=
290 CHUNK_PREAMBLE_SIZE) {
291 chunk_type = CHUNK_BAD;
292 break;
293 }
294
295 opcode_size = LE_16(&opcode_preamble[0]);
296 opcode_type = opcode_preamble[2];
297 opcode_version = opcode_preamble[3];
298
299 chunk_size -= OPCODE_PREAMBLE_SIZE;
300 chunk_size -= opcode_size;
301 if (chunk_size < 0) {
302 debug_ipmovie("chunk_size countdown just went negative\n");
303 chunk_type = CHUNK_BAD;
304 break;
305 }
306
307 debug_ipmovie(" opcode type %02X, version %d, 0x%04X bytes: ",
308 opcode_type, opcode_version, opcode_size);
309 switch (opcode_type) {
310
311 case OPCODE_END_OF_STREAM:
312 debug_ipmovie("end of stream\n");
313 url_fseek(pb, opcode_size, SEEK_CUR);
314 break;
315
316 case OPCODE_END_OF_CHUNK:
317 debug_ipmovie("end of chunk\n");
318 url_fseek(pb, opcode_size, SEEK_CUR);
319 break;
320
321 case OPCODE_CREATE_TIMER:
322 debug_ipmovie("create timer\n");
323 if ((opcode_version > 0) || (opcode_size > 6)) {
324 debug_ipmovie("bad create_timer opcode\n");
325 chunk_type = CHUNK_BAD;
326 break;
327 }
328 if (get_buffer(pb, scratch, opcode_size) !=
329 opcode_size) {
330 chunk_type = CHUNK_BAD;
331 break;
332 }
333 s->fps = 1000000 / (LE_32(&scratch[0]) * LE_16(&scratch[4]));
334 s->fps++; /* above calculation usually yields 14.9; we need 15 */
335 s->frame_pts_inc = 90000 / s->fps;
336 debug_ipmovie("%d frames/second (timer div = %d, subdiv = %d)\n",
337 s->fps, LE_32(&scratch[0]), LE_16(&scratch[4]));
338 break;
339
340 case OPCODE_INIT_AUDIO_BUFFERS:
341 debug_ipmovie("initialize audio buffers\n");
342 if ((opcode_version > 1) || (opcode_size > 10)) {
343 debug_ipmovie("bad init_audio_buffers opcode\n");
344 chunk_type = CHUNK_BAD;
345 break;
346 }
347 if (get_buffer(pb, scratch, opcode_size) !=
348 opcode_size) {
349 chunk_type = CHUNK_BAD;
350 break;
351 }
352 s->audio_sample_rate = LE_16(&scratch[4]);
353 audio_flags = LE_16(&scratch[2]);
354 /* bit 0 of the flags: 0 = mono, 1 = stereo */
355 s->audio_channels = (audio_flags & 1) + 1;
356 /* bit 1 of the flags: 0 = 8 bit, 1 = 16 bit */
357 s->audio_bits = (((audio_flags >> 1) & 1) + 1) * 8;
358 /* bit 2 indicates compressed audio in version 1 opcode */
359 if ((opcode_version == 1) && (audio_flags & 0x4))
360 s->audio_type = CODEC_ID_INTERPLAY_DPCM;
361 else if (s->audio_bits == 16)
362 s->audio_type = CODEC_ID_PCM_S16LE;
363 else
364 s->audio_type = CODEC_ID_PCM_U8;
365 debug_ipmovie("audio: %d bits, %d Hz, %s, %s format\n",
366 s->audio_bits,
367 s->audio_sample_rate,
368 (s->audio_channels == 2) ? "stereo" : "mono",
369 (s->audio_type == CODEC_ID_INTERPLAY_DPCM) ?
370 "Interplay audio" : "PCM");
371 break;
372
373 case OPCODE_START_STOP_AUDIO:
374 debug_ipmovie("start/stop audio\n");
375 url_fseek(pb, opcode_size, SEEK_CUR);
376 break;
377
378 case OPCODE_INIT_VIDEO_BUFFERS:
379 debug_ipmovie("initialize video buffers\n");
380 if ((opcode_version > 2) || (opcode_size > 8)) {
381 debug_ipmovie("bad init_video_buffers opcode\n");
382 chunk_type = CHUNK_BAD;
383 break;
384 }
385 if (get_buffer(pb, scratch, opcode_size) !=
386 opcode_size) {
387 chunk_type = CHUNK_BAD;
388 break;
389 }
390 s->video_width = LE_16(&scratch[0]) * 8;
391 s->video_height = LE_16(&scratch[2]) * 8;
392 debug_ipmovie("video resolution: %d x %d\n",
393 s->video_width, s->video_height);
394 break;
395
396 case OPCODE_UNKNOWN_06:
397 case OPCODE_UNKNOWN_0E:
398 case OPCODE_UNKNOWN_10:
399 case OPCODE_UNKNOWN_12:
400 case OPCODE_UNKNOWN_13:
401 case OPCODE_UNKNOWN_14:
402 case OPCODE_UNKNOWN_15:
403 debug_ipmovie("unknown (but documented) opcode %02X\n", opcode_type);
404 url_fseek(pb, opcode_size, SEEK_CUR);
405 break;
406
407 case OPCODE_SEND_BUFFER:
408 debug_ipmovie("send buffer\n");
409 url_fseek(pb, opcode_size, SEEK_CUR);
410 break;
411
412 case OPCODE_AUDIO_FRAME:
413 debug_ipmovie("audio frame\n");
414
415 /* log position and move on for now */
416 s->audio_chunk_offset = url_ftell(pb);
417 s->audio_chunk_size = opcode_size;
418 url_fseek(pb, opcode_size, SEEK_CUR);
419 break;
420
421 case OPCODE_SILENCE_FRAME:
422 debug_ipmovie("silence frame\n");
423 url_fseek(pb, opcode_size, SEEK_CUR);
424 break;
425
426 case OPCODE_INIT_VIDEO_MODE:
427 debug_ipmovie("initialize video mode\n");
428 url_fseek(pb, opcode_size, SEEK_CUR);
429 break;
430
431 case OPCODE_CREATE_GRADIENT:
432 debug_ipmovie("create gradient\n");
433 url_fseek(pb, opcode_size, SEEK_CUR);
434 break;
435
436 case OPCODE_SET_PALETTE:
437 debug_ipmovie("set palette\n");
438 /* check for the logical maximum palette size
439 * (3 * 256 + 4 bytes) */
440 if (opcode_size > 0x304) {
441 debug_ipmovie("demux_ipmovie: set_palette opcode too large\n");
442 chunk_type = CHUNK_BAD;
443 break;
444 }
445 if (get_buffer(pb, scratch, opcode_size) != opcode_size) {
446 chunk_type = CHUNK_BAD;
447 break;
448 }
449
450 /* load the palette into internal data structure */
451 first_color = LE_16(&scratch[0]);
773159ed 452 last_color = first_color + LE_16(&scratch[2]);
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453 /* sanity check (since they are 16 bit values) */
454 if ((first_color > 0xFF) || (last_color > 0xFF)) {
455 debug_ipmovie("demux_ipmovie: set_palette indices out of range (%d -> %d)\n",
456 first_color, last_color);
457 chunk_type = CHUNK_BAD;
458 break;
459 }
460 j = 4; /* offset of first palette data */
3ef8be2b 461 for (i = first_color; i <= last_color; i++) {
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462 /* the palette is stored as a 6-bit VGA palette, thus each
463 * component is shifted up to a 8-bit range */
464 s->palette_control.palette[i * 3 + 0] = scratch[j++] * 4;
465 s->palette_control.palette[i * 3 + 1] = scratch[j++] * 4;
466 s->palette_control.palette[i * 3 + 2] = scratch[j++] * 4;
3ef8be2b 467 }
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468 /* indicate a palette change */
469 s->palette_control.palette_changed = 1;
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470 break;
471
472 case OPCODE_SET_PALETTE_COMPRESSED:
473 debug_ipmovie("set palette compressed\n");
474 url_fseek(pb, opcode_size, SEEK_CUR);
475 break;
476
477 case OPCODE_SET_DECODING_MAP:
478 debug_ipmovie("set decoding map\n");
479
480 /* log position and move on for now */
481 s->decode_map_chunk_offset = url_ftell(pb);
482 s->decode_map_chunk_size = opcode_size;
483 url_fseek(pb, opcode_size, SEEK_CUR);
484 break;
485
486 case OPCODE_VIDEO_DATA:
487 debug_ipmovie("set video data\n");
488
489 /* log position and move on for now */
490 s->video_chunk_offset = url_ftell(pb);
491 s->video_chunk_size = opcode_size;
492 url_fseek(pb, opcode_size, SEEK_CUR);
493 break;
494
495 default:
496 debug_ipmovie("*** unknown opcode type\n");
497 chunk_type = CHUNK_BAD;
498 break;
499
500 }
501 }
502
503 /* make a note of where the stream is sitting */
504 s->next_chunk_offset = url_ftell(pb);
505
506 /* dispatch the first of any pending packets */
507 if ((chunk_type == CHUNK_VIDEO) || (chunk_type == CHUNK_AUDIO_ONLY))
508 chunk_type = load_ipmovie_packet(s, pb, pkt);
509
510 return chunk_type;
511}
512
513static int ipmovie_probe(AVProbeData *p)
514{
515 if (p->buf_size < IPMOVIE_SIGNATURE_SIZE)
516 return 0;
517 if (strncmp(p->buf, IPMOVIE_SIGNATURE, IPMOVIE_SIGNATURE_SIZE) != 0)
518 return 0;
519
520 return AVPROBE_SCORE_MAX;
521}
522
523static int ipmovie_read_header(AVFormatContext *s,
524 AVFormatParameters *ap)
525{
526 IPMVEContext *ipmovie = (IPMVEContext *)s->priv_data;
527 ByteIOContext *pb = &s->pb;
528 AVPacket pkt;
529 AVStream *st;
530
531 /* initialize private context members */
532 ipmovie->video_pts = ipmovie->audio_frame_count = 0;
533 ipmovie->audio_chunk_offset = ipmovie->video_chunk_offset =
534 ipmovie->decode_map_chunk_offset = 0;
535
536 /* on the first read, this will position the stream at the first chunk */
537 ipmovie->next_chunk_offset = IPMOVIE_SIGNATURE_SIZE + 6;
538
539 /* process the first chunk which should be CHUNK_INIT_VIDEO */
540 if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_VIDEO)
541 return AVERROR_INVALIDDATA;
542
543 /* process the next chunk which should be CHUNK_INIT_AUDIO */
544 if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_AUDIO)
545 return AVERROR_INVALIDDATA;
546
547 /* set the pts reference (1 pts = 1/90000) */
548 s->pts_num = 1;
549 s->pts_den = 90000;
550
551 /* initialize the stream decoders */
552 st = av_new_stream(s, 0);
553 if (!st)
554 return AVERROR_NOMEM;
555 ipmovie->video_stream_index = st->index;
556 st->codec.codec_type = CODEC_TYPE_VIDEO;
557 st->codec.codec_id = CODEC_ID_INTERPLAY_VIDEO;
558 st->codec.codec_tag = 0; /* no fourcc */
559 st->codec.width = ipmovie->video_width;
560 st->codec.height = ipmovie->video_height;
561
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562 /* palette considerations */
563 st->codec.extradata_size = sizeof(AVPaletteControl);
564 st->codec.extradata = &ipmovie->palette_control;
565
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566 st = av_new_stream(s, 0);
567 if (!st)
568 return AVERROR_NOMEM;
569 ipmovie->audio_stream_index = st->index;
570 st->codec.codec_type = CODEC_TYPE_AUDIO;
571 st->codec.codec_id = ipmovie->audio_type;
572 st->codec.codec_tag = 0; /* no tag */
573 st->codec.channels = ipmovie->audio_channels;
574 st->codec.sample_rate = ipmovie->audio_sample_rate;
575 st->codec.bits_per_sample = ipmovie->audio_bits;
576 st->codec.bit_rate = st->codec.channels * st->codec.sample_rate *
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577 st->codec.bits_per_sample;
578 if (st->codec.codec_id == CODEC_ID_INTERPLAY_DPCM)
579 st->codec.bit_rate /= 2;
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580 st->codec.block_align = st->codec.channels * st->codec.bits_per_sample;
581
582 return 0;
583}
584
585static int ipmovie_read_packet(AVFormatContext *s,
586 AVPacket *pkt)
587{
588 IPMVEContext *ipmovie = (IPMVEContext *)s->priv_data;
589 ByteIOContext *pb = &s->pb;
590 int ret;
591
592 ret = process_ipmovie_chunk(ipmovie, pb, pkt);
593 if (ret == CHUNK_BAD)
594 ret = AVERROR_INVALIDDATA;
595 else if (ret == CHUNK_EOF)
596 ret = -EIO;
597 else if (ret == CHUNK_NOMEM)
598 ret = AVERROR_NOMEM;
599 else
600 ret = 0;
601
602 return ret;
603}
604
605static int ipmovie_read_close(AVFormatContext *s)
606{
607// IPMVEContext *ipmovie = (IPMVEContext *)s->priv_data;
608
609 return 0;
610}
611
612static AVInputFormat ipmovie_iformat = {
613 "ipmovie",
614 "Interplay MVE format",
615 sizeof(IPMVEContext),
616 ipmovie_probe,
617 ipmovie_read_header,
618 ipmovie_read_packet,
619 ipmovie_read_close,
620};
621
622int ipmovie_init(void)
623{
624 av_register_input_format(&ipmovie_iformat);
625 return 0;
626}
627