diff options
Diffstat (limited to 'apps/codecs/libcook/rm2wav.c')
-rw-r--r-- | apps/codecs/libcook/rm2wav.c | 584 |
1 files changed, 584 insertions, 0 deletions
diff --git a/apps/codecs/libcook/rm2wav.c b/apps/codecs/libcook/rm2wav.c new file mode 100644 index 0000000000..4ef1ec4f66 --- /dev/null +++ b/apps/codecs/libcook/rm2wav.c | |||
@@ -0,0 +1,584 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2008 Dave Chapman | ||
11 | * Copyright (C) 2009 Mohamed Tarek | ||
12 | * | ||
13 | * This program is free software; you can redistribute it and/or | ||
14 | * modify it under the terms of the GNU General Public License | ||
15 | * as published by the Free Software Foundation; either version 2 | ||
16 | * of the License, or (at your option) any later version. | ||
17 | * | ||
18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
19 | * KIND, either express or implied. | ||
20 | * | ||
21 | ****************************************************************************/ | ||
22 | #include <stdio.h> | ||
23 | #include <string.h> | ||
24 | #include <stdint.h> | ||
25 | #include <sys/types.h> | ||
26 | #include <sys/stat.h> | ||
27 | #include <fcntl.h> | ||
28 | #include <unistd.h> | ||
29 | |||
30 | #include "rm2wav.h" | ||
31 | |||
32 | #define MAX_PATH 260 | ||
33 | #define PKT_HEADER_SIZE 12 | ||
34 | #define RAW_AUDIO_DATA packet_length-PKT_HEADER_SIZE | ||
35 | |||
36 | |||
37 | #if 0 | ||
38 | #define DEBUG | ||
39 | #define DEBUGF printf | ||
40 | #else | ||
41 | #define DEBUGF(...) | ||
42 | #endif | ||
43 | |||
44 | /* ASF codec IDs */ | ||
45 | #define CODEC_ID_WMAV1 0x160 | ||
46 | #define CODEC_ID_WMAV2 0x161 | ||
47 | |||
48 | static unsigned char wav_header[44]={ | ||
49 | 'R','I','F','F',// 0 - ChunkID | ||
50 | 0,0,0,0, // 4 - ChunkSize (filesize-8) | ||
51 | 'W','A','V','E',// 8 - Format | ||
52 | 'f','m','t',' ',// 12 - SubChunkID | ||
53 | 16,0,0,0, // 16 - SubChunk1ID // 16 for PCM | ||
54 | 1,0, // 20 - AudioFormat (1=Uncompressed) | ||
55 | 2,0, // 22 - NumChannels | ||
56 | 0,0,0,0, // 24 - SampleRate in Hz | ||
57 | 0,0,0,0, // 28 - Byte Rate (SampleRate*NumChannels*(BitsPerSample/8) | ||
58 | 4,0, // 32 - BlockAlign (== NumChannels * BitsPerSample/8) | ||
59 | 16,0, // 34 - BitsPerSample | ||
60 | 'd','a','t','a',// 36 - Subchunk2ID | ||
61 | 0,0,0,0 // 40 - Subchunk2Size | ||
62 | }; | ||
63 | |||
64 | int open_wav(char* filename) { | ||
65 | int fd,res; | ||
66 | |||
67 | fd=open(filename,O_CREAT|O_WRONLY|O_TRUNC,S_IRUSR|S_IWUSR); | ||
68 | if (fd >= 0) { | ||
69 | res = write(fd,wav_header,sizeof(wav_header)); | ||
70 | } | ||
71 | |||
72 | return(fd); | ||
73 | } | ||
74 | |||
75 | void close_wav(int fd, RMContext *rmctx) { | ||
76 | int x,res; | ||
77 | int filesize; | ||
78 | int bytes_per_sample = 2; | ||
79 | int samples_per_frame = rmctx->samples_pf_pc; | ||
80 | int nb_channels = rmctx->nb_channels; | ||
81 | int sample_rate = rmctx->sample_rate; | ||
82 | int nb_frames = rmctx->audio_framesize/rmctx->block_align * rmctx->nb_packets - 2; // first 2 frames have no valid audio; skipped in output | ||
83 | |||
84 | filesize= samples_per_frame*bytes_per_sample*nb_frames +44; | ||
85 | printf("Filesize = %d\n",filesize); | ||
86 | |||
87 | // ChunkSize | ||
88 | x=filesize-8; | ||
89 | wav_header[4]=(x&0xff); | ||
90 | wav_header[5]=(x&0xff00)>>8; | ||
91 | wav_header[6]=(x&0xff0000)>>16; | ||
92 | wav_header[7]=(x&0xff000000)>>24; | ||
93 | |||
94 | // Number of channels | ||
95 | wav_header[22]=nb_channels; | ||
96 | |||
97 | // Samplerate | ||
98 | wav_header[24]=sample_rate&0xff; | ||
99 | wav_header[25]=(sample_rate&0xff00)>>8; | ||
100 | wav_header[26]=(sample_rate&0xff0000)>>16; | ||
101 | wav_header[27]=(sample_rate&0xff000000)>>24; | ||
102 | |||
103 | // ByteRate | ||
104 | x=sample_rate*bytes_per_sample*nb_channels; | ||
105 | wav_header[28]=(x&0xff); | ||
106 | wav_header[29]=(x&0xff00)>>8; | ||
107 | wav_header[30]=(x&0xff0000)>>16; | ||
108 | wav_header[31]=(x&0xff000000)>>24; | ||
109 | |||
110 | // BlockAlign | ||
111 | wav_header[32]=rmctx->block_align;//2*rmctx->nb_channels; | ||
112 | |||
113 | // Bits per sample | ||
114 | wav_header[34]=16; | ||
115 | |||
116 | // Subchunk2Size | ||
117 | x=filesize-44; | ||
118 | wav_header[40]=(x&0xff); | ||
119 | wav_header[41]=(x&0xff00)>>8; | ||
120 | wav_header[42]=(x&0xff0000)>>16; | ||
121 | wav_header[43]=(x&0xff000000)>>24; | ||
122 | |||
123 | lseek(fd,0,SEEK_SET); | ||
124 | res = write(fd,wav_header,sizeof(wav_header)); | ||
125 | close(fd); | ||
126 | } | ||
127 | |||
128 | /* Some Rockbox-like functions (these should be implemented in metadata_common.[ch] */ | ||
129 | struct cook_extradata { | ||
130 | uint32_t cook_version; | ||
131 | uint16_t samples_pf_pc; /* samples per frame per channel */ | ||
132 | uint16_t nb_subbands; /* number of subbands in the frequency domain */ | ||
133 | |||
134 | /* extra 8 bytes for stereo data */ | ||
135 | uint32_t unused; | ||
136 | uint16_t js_subband_start; /* joint stereo subband start */ | ||
137 | uint16_t js_vlc_bits; | ||
138 | }; | ||
139 | |||
140 | static int read_uint8(int fd, uint8_t* buf) | ||
141 | { | ||
142 | unsigned char tmp[1]; | ||
143 | int res; | ||
144 | |||
145 | res=read(fd, tmp, 1); | ||
146 | *buf = tmp[0]; | ||
147 | return res; | ||
148 | } | ||
149 | |||
150 | static int read_uint16be(int fd, uint16_t* buf) | ||
151 | { | ||
152 | unsigned char tmp[2]; | ||
153 | int res; | ||
154 | |||
155 | res=read(fd, tmp, 2); | ||
156 | *buf = (tmp[0] << 8) | tmp[1]; | ||
157 | return res; | ||
158 | } | ||
159 | |||
160 | static int read_uint32be(int fd, uint32_t* buf) | ||
161 | { | ||
162 | unsigned char tmp[4]; | ||
163 | int res; | ||
164 | |||
165 | res=read(fd, tmp, 4); | ||
166 | *buf = (tmp[0] << 24) | (tmp[1] << 16) | (tmp[2] << 8) | tmp[3]; | ||
167 | return res; | ||
168 | } | ||
169 | |||
170 | off_t filesize(int fd) | ||
171 | { | ||
172 | struct stat buf; | ||
173 | |||
174 | if (fstat(fd,&buf) == -1) { | ||
175 | return -1; | ||
176 | } else { | ||
177 | return buf.st_size; | ||
178 | } | ||
179 | } | ||
180 | |||
181 | int read_cook_extradata(int fd, RMContext *rmctx) { | ||
182 | read_uint32be(fd, &rmctx->cook_version); | ||
183 | read_uint16be(fd, &rmctx->samples_pf_pc); | ||
184 | read_uint16be(fd, &rmctx->nb_subbands); | ||
185 | if(rmctx->extradata_size == 16) { | ||
186 | read_uint32be(fd, &rmctx->unused); | ||
187 | read_uint16be(fd, &rmctx->js_subband_start); | ||
188 | read_uint16be(fd, &rmctx->js_vlc_bits); | ||
189 | } | ||
190 | return rmctx->extradata_size; /* for 'skipped' */ | ||
191 | } | ||
192 | |||
193 | void print_cook_extradata(RMContext *rmctx) { | ||
194 | |||
195 | printf(" cook_version = 0x%08x\n", rmctx->cook_version); | ||
196 | printf(" samples_per_frame_per_channel = %d\n", rmctx->samples_pf_pc); | ||
197 | printf(" number_of_subbands_in_freq_domain = %d\n", rmctx->nb_subbands); | ||
198 | if(rmctx->extradata_size == 16) { | ||
199 | printf(" joint_stereo_subband_start = %d\n",rmctx->js_subband_start); | ||
200 | printf(" joint_stereo_vlc_bits = %d\n", rmctx->js_vlc_bits); | ||
201 | } | ||
202 | } | ||
203 | |||
204 | |||
205 | struct real_object_t | ||
206 | { | ||
207 | uint32_t fourcc; | ||
208 | uint32_t size; | ||
209 | uint16_t version; | ||
210 | }; | ||
211 | |||
212 | #define FOURCC(a,b,c,d) (((a)<<24) | ((b) << 16) | ((c) << 8) | (d)) | ||
213 | |||
214 | static int real_read_object_header(int fd, struct real_object_t* obj) | ||
215 | { | ||
216 | int n; | ||
217 | |||
218 | if ((n = read_uint32be(fd, &obj->fourcc)) <= 0) return n; | ||
219 | if ((n = read_uint32be(fd, &obj->size)) <= 0) return n; | ||
220 | if ((n = read_uint16be(fd, &obj->version)) <= 0) return n; | ||
221 | |||
222 | return 1; | ||
223 | } | ||
224 | |||
225 | static char* fourcc2str(uint32_t f) | ||
226 | { | ||
227 | static char res[5]; | ||
228 | |||
229 | res[0] = (f & 0xff000000) >> 24; | ||
230 | res[1] = (f & 0xff0000) >> 16; | ||
231 | res[2] = (f & 0xff00) >> 8; | ||
232 | res[3] = (f & 0xff); | ||
233 | res[4] = 0; | ||
234 | |||
235 | return res; | ||
236 | } | ||
237 | |||
238 | static int read_str(int fd, char* buf) | ||
239 | { | ||
240 | uint8_t len; | ||
241 | int res; | ||
242 | |||
243 | res = read(fd, &len, 1); | ||
244 | res = read(fd, buf, len); | ||
245 | buf[len]=0; | ||
246 | |||
247 | return len+1; | ||
248 | } | ||
249 | |||
250 | static int real_read_audio_stream_info(int fd, RMContext *rmctx) | ||
251 | { | ||
252 | int skipped = 0; | ||
253 | uint32_t version; | ||
254 | struct real_object_t obj; | ||
255 | memset(&obj,0,sizeof(obj)); | ||
256 | uint32_t header_size; | ||
257 | uint16_t flavor; | ||
258 | uint32_t coded_framesize; | ||
259 | uint32_t unknown1; | ||
260 | uint32_t unknown2; | ||
261 | uint32_t unknown3; | ||
262 | uint16_t unknown4; | ||
263 | uint16_t unknown5; | ||
264 | uint16_t unknown6; | ||
265 | uint16_t unknown7; | ||
266 | uint32_t unknown8; | ||
267 | uint8_t interleaver_id_length; | ||
268 | uint32_t interleaver_id; | ||
269 | uint8_t fourcc_length; | ||
270 | uint32_t fourcc = 0; | ||
271 | uint8_t unknown9; | ||
272 | uint16_t unknown10; | ||
273 | uint8_t unknown11; | ||
274 | |||
275 | read_uint32be(fd, &version); | ||
276 | skipped += 4; | ||
277 | |||
278 | printf(" version=0x%04x\n",((version >> 16) & 0xff)); | ||
279 | if (((version >> 16) & 0xff) == 3) { | ||
280 | /* Very old version */ | ||
281 | } else { | ||
282 | real_read_object_header(fd, &obj); | ||
283 | skipped += 10; | ||
284 | read_uint32be(fd, &header_size); | ||
285 | skipped += 4; | ||
286 | /* obj.size will be filled with an unknown value, replaced with header_size */ | ||
287 | printf(" Object: %s, size: %d bytes, version: 0x%04x\n",fourcc2str(obj.fourcc),header_size,obj.version); | ||
288 | |||
289 | read_uint16be(fd, &flavor); | ||
290 | read_uint32be(fd, &coded_framesize); | ||
291 | read_uint32be(fd, &unknown1); | ||
292 | read_uint32be(fd, &unknown2); | ||
293 | read_uint32be(fd, &unknown3); | ||
294 | read_uint16be(fd, &rmctx->sub_packet_h); | ||
295 | read_uint16be(fd, &rmctx->block_align); | ||
296 | read_uint16be(fd, &rmctx->sub_packet_size); | ||
297 | read_uint16be(fd, &unknown4); | ||
298 | skipped += 26; | ||
299 | if (((version >> 16) & 0xff) == 5) | ||
300 | { | ||
301 | read_uint16be(fd, &unknown5); | ||
302 | read_uint16be(fd, &unknown6); | ||
303 | read_uint16be(fd, &unknown7); | ||
304 | skipped += 6; | ||
305 | } | ||
306 | read_uint16be(fd, &rmctx->sample_rate); | ||
307 | read_uint32be(fd, &unknown8); | ||
308 | read_uint16be(fd, &rmctx->nb_channels); | ||
309 | skipped += 8; | ||
310 | if (((version >> 16) & 0xff) == 4) | ||
311 | { | ||
312 | read_uint8(fd, &interleaver_id_length); | ||
313 | read_uint32be(fd, &interleaver_id); | ||
314 | read_uint8(fd, &fourcc_length); | ||
315 | read_uint32be(fd, &fourcc); | ||
316 | skipped += 10; | ||
317 | } | ||
318 | if (((version >> 16) & 0xff) == 5) | ||
319 | { | ||
320 | read_uint32be(fd, &interleaver_id); | ||
321 | read_uint32be(fd, &fourcc); | ||
322 | skipped += 8; | ||
323 | } | ||
324 | read_uint8(fd,&unknown9); | ||
325 | read_uint16be(fd,&unknown10); | ||
326 | skipped += 3; | ||
327 | if (((version >> 16) & 0xff) == 5) | ||
328 | { | ||
329 | read_uint8(fd, &unknown11); | ||
330 | skipped += 1; | ||
331 | } | ||
332 | |||
333 | read_uint32be(fd, &rmctx->extradata_size); | ||
334 | skipped += 4; | ||
335 | if(!strncmp(fourcc2str(fourcc),"cook",4)) | ||
336 | skipped += read_cook_extradata(fd, rmctx); | ||
337 | |||
338 | |||
339 | printf(" flavor = %d\n",flavor); | ||
340 | printf(" coded_frame_size = %d\n",coded_framesize); | ||
341 | printf(" sub_packet_h = %d\n",rmctx->sub_packet_h); | ||
342 | printf(" frame_size = %d\n",rmctx->block_align); | ||
343 | printf(" sub_packet_size = %d\n",rmctx->sub_packet_size); | ||
344 | printf(" sample_rate= %d\n",rmctx->sample_rate); | ||
345 | printf(" channels= %d\n",rmctx->nb_channels); | ||
346 | printf(" fourcc = %s\n",fourcc2str(fourcc)); | ||
347 | printf(" codec_extra_data_length = %d\n",rmctx->extradata_size); | ||
348 | printf(" codec_extradata :\n"); | ||
349 | print_cook_extradata(rmctx); | ||
350 | |||
351 | } | ||
352 | |||
353 | return skipped; | ||
354 | } | ||
355 | |||
356 | int real_parse_header(int fd, RMContext *rmctx) | ||
357 | { | ||
358 | struct real_object_t obj; | ||
359 | memset(&obj,0,sizeof(obj)); | ||
360 | int res; | ||
361 | int skipped; | ||
362 | off_t curpos; | ||
363 | |||
364 | uint32_t unknown1; | ||
365 | uint32_t unknown2; | ||
366 | |||
367 | uint32_t max_bitrate; | ||
368 | uint32_t avg_bitrate = 0; | ||
369 | uint32_t max_packet_size; | ||
370 | uint32_t avg_packet_size; | ||
371 | uint32_t packet_count; | ||
372 | uint32_t duration; | ||
373 | uint32_t preroll; | ||
374 | uint32_t index_offset; | ||
375 | uint32_t data_offset; | ||
376 | uint16_t num_streams; | ||
377 | uint16_t flags = 0; | ||
378 | |||
379 | uint16_t stream_id; | ||
380 | uint32_t start_time; | ||
381 | char desc[256]; | ||
382 | char mimetype[256]; | ||
383 | uint32_t codec_data_size; | ||
384 | uint32_t v; | ||
385 | |||
386 | char title[256]; | ||
387 | char author[256]; | ||
388 | char copyright[256]; | ||
389 | char comment[256]; | ||
390 | |||
391 | uint32_t next_data_off; | ||
392 | uint8_t header_end; | ||
393 | |||
394 | curpos = lseek(fd, 0, SEEK_SET); | ||
395 | res = real_read_object_header(fd, &obj); | ||
396 | |||
397 | if (obj.fourcc == FOURCC('.','r','a',0xfd)) | ||
398 | { | ||
399 | /* Very old .ra format - not yet supported */ | ||
400 | return -1; | ||
401 | } | ||
402 | else if (obj.fourcc != FOURCC('.','R','M','F')) | ||
403 | { | ||
404 | return -1; | ||
405 | } | ||
406 | |||
407 | read_uint32be(fd, &unknown1); | ||
408 | read_uint32be(fd, &unknown2); | ||
409 | |||
410 | printf("Object: %s, size: %d bytes, version: 0x%04x, pos: %d\n",fourcc2str(obj.fourcc),(int)obj.size,obj.version,(int)curpos); | ||
411 | printf(" unknown1=%d (0x%08x)\n",unknown1,unknown1); | ||
412 | printf(" unknown2=%d (0x%08x)\n",unknown2,unknown2); | ||
413 | |||
414 | res = real_read_object_header(fd, &obj); | ||
415 | header_end = 0; | ||
416 | while(res) | ||
417 | { | ||
418 | printf("Object: %s, size: %d bytes, version: 0x%04x, pos: %d\n",fourcc2str(obj.fourcc),(int)obj.size,obj.version,(int)curpos); | ||
419 | skipped = 10; | ||
420 | if(obj.fourcc == FOURCC('I','N','D','X')) | ||
421 | break; | ||
422 | switch (obj.fourcc) | ||
423 | { | ||
424 | case FOURCC('P','R','O','P'): /* File properties */ | ||
425 | read_uint32be(fd, &max_bitrate); | ||
426 | read_uint32be(fd, &rmctx->bit_rate); /*avg bitrate*/ | ||
427 | read_uint32be(fd, &max_packet_size); | ||
428 | read_uint32be(fd, &avg_packet_size); | ||
429 | read_uint32be(fd, &packet_count); | ||
430 | read_uint32be(fd, &duration); | ||
431 | read_uint32be(fd, &preroll); | ||
432 | read_uint32be(fd, &index_offset); | ||
433 | read_uint32be(fd, &data_offset); | ||
434 | read_uint16be(fd, &num_streams); | ||
435 | read_uint16be(fd, &rmctx->flags); | ||
436 | skipped += 40; | ||
437 | |||
438 | printf(" max_bitrate = %d\n",max_bitrate); | ||
439 | printf(" avg_bitrate = %d\n",avg_bitrate); | ||
440 | printf(" max_packet_size = %d\n",max_packet_size); | ||
441 | printf(" avg_packet_size = %d\n",avg_packet_size); | ||
442 | printf(" packet_count = %d\n",packet_count); | ||
443 | printf(" duration = %d\n",duration); | ||
444 | printf(" preroll = %d\n",preroll); | ||
445 | printf(" index_offset = %d\n",index_offset); | ||
446 | printf(" data_offset = %d\n",data_offset); | ||
447 | printf(" num_streams = %d\n",num_streams); | ||
448 | printf(" flags=0x%04x\n",flags); | ||
449 | break; | ||
450 | |||
451 | case FOURCC('C','O','N','T'): | ||
452 | /* Four strings - Title, Author, Copyright, Comment */ | ||
453 | skipped += read_str(fd,title); | ||
454 | skipped += read_str(fd,author); | ||
455 | skipped += read_str(fd,copyright); | ||
456 | skipped += read_str(fd,comment); | ||
457 | |||
458 | printf(" title=\"%s\"\n",title); | ||
459 | printf(" author=\"%s\"\n",author); | ||
460 | printf(" copyright=\"%s\"\n",copyright); | ||
461 | printf(" comment=\"%s\"\n",comment); | ||
462 | break; | ||
463 | |||
464 | case FOURCC('M','D','P','R'): /* Media properties */ | ||
465 | read_uint16be(fd,&stream_id); | ||
466 | skipped += 2; | ||
467 | read_uint32be(fd,&max_bitrate); | ||
468 | skipped += 4; | ||
469 | read_uint32be(fd,&avg_bitrate); | ||
470 | skipped += 4; | ||
471 | read_uint32be(fd,&max_packet_size); | ||
472 | skipped += 4; | ||
473 | read_uint32be(fd,&avg_packet_size); | ||
474 | skipped += 4; | ||
475 | read_uint32be(fd,&start_time); | ||
476 | skipped += 4; | ||
477 | read_uint32be(fd,&preroll); | ||
478 | skipped += 4; | ||
479 | read_uint32be(fd,&duration); | ||
480 | skipped += 4; | ||
481 | skipped += read_str(fd,desc); | ||
482 | skipped += read_str(fd,mimetype); | ||
483 | read_uint32be(fd,&codec_data_size); | ||
484 | skipped += 4; | ||
485 | //From ffmpeg: codec_pos = url_ftell(pb); | ||
486 | read_uint32be(fd,&v); | ||
487 | skipped += 4; | ||
488 | |||
489 | printf(" stream_id = 0x%04x\n",stream_id); | ||
490 | printf(" max_bitrate = %d\n",max_bitrate); | ||
491 | printf(" avg_bitrate = %d\n",avg_bitrate); | ||
492 | printf(" max_packet_size = %d\n",max_packet_size); | ||
493 | printf(" avg_packet_size = %d\n",avg_packet_size); | ||
494 | printf(" start_time = %d\n",start_time); | ||
495 | printf(" preroll = %d\n",preroll); | ||
496 | printf(" duration = %d\n",duration); | ||
497 | printf(" desc=\"%s\"\n",desc); | ||
498 | printf(" mimetype=\"%s\"\n",mimetype); | ||
499 | printf(" codec_data_size = %d\n",codec_data_size); | ||
500 | printf(" v=\"%s\"\n", fourcc2str(v)); | ||
501 | |||
502 | if (v == FOURCC('.','r','a',0xfd)) | ||
503 | { | ||
504 | skipped += real_read_audio_stream_info(fd, rmctx); | ||
505 | } | ||
506 | |||
507 | break; | ||
508 | |||
509 | case FOURCC('D','A','T','A'): | ||
510 | |||
511 | read_uint32be(fd,&rmctx->nb_packets); | ||
512 | skipped += 4; | ||
513 | read_uint32be(fd,&next_data_off); | ||
514 | skipped += 4; | ||
515 | if (!rmctx->nb_packets && (rmctx->flags & 4)) | ||
516 | rmctx->nb_packets = 3600 * 25; | ||
517 | printf(" data_nb_packets = %d\n",rmctx->nb_packets); | ||
518 | printf(" next DATA offset = %d\n",next_data_off); | ||
519 | header_end = 1; | ||
520 | break; | ||
521 | } | ||
522 | if(header_end) break; | ||
523 | curpos = lseek(fd, obj.size - skipped, SEEK_CUR); | ||
524 | res = real_read_object_header(fd, &obj); | ||
525 | } | ||
526 | |||
527 | |||
528 | return 0; | ||
529 | } | ||
530 | |||
531 | void rm_get_packet(int fd,RMContext *rmctx, RMPacket *pkt) | ||
532 | { | ||
533 | uint8_t unknown,packet_group; | ||
534 | uint16_t x, place; | ||
535 | uint16_t sps = rmctx->sub_packet_size; | ||
536 | uint16_t h = rmctx->sub_packet_h; | ||
537 | uint16_t y = rmctx->sub_packet_cnt; | ||
538 | uint16_t w = rmctx->audio_framesize; | ||
539 | do | ||
540 | { | ||
541 | y = rmctx->sub_packet_cnt; | ||
542 | read_uint16be(fd,&pkt->version); | ||
543 | read_uint16be(fd,&pkt->length); | ||
544 | read_uint16be(fd,&pkt->stream_number); | ||
545 | read_uint32be(fd,&pkt->timestamp); | ||
546 | DEBUGF(" version = %d\n" | ||
547 | " length = %d\n" | ||
548 | " stream = %d\n" | ||
549 | " timestmp= %d\n",pkt->version,pkt->length,pkt->stream_number,pkt->timestamp); | ||
550 | |||
551 | //getchar(); | ||
552 | if(pkt->version == 0) | ||
553 | { | ||
554 | read_uint8(fd,&packet_group); | ||
555 | read_uint8(fd,&pkt->flags); | ||
556 | } | ||
557 | if(pkt->version == 1) | ||
558 | read_uint8(fd,&unknown); | ||
559 | |||
560 | if (pkt->flags & 2) /* keyframe */ | ||
561 | y = rmctx->sub_packet_cnt = 0; | ||
562 | if (!y) /* if keyframe update playback elapsed time */ | ||
563 | rmctx->audiotimestamp = pkt->timestamp; | ||
564 | |||
565 | for(x = 0 ; x < w/sps; x++) | ||
566 | { | ||
567 | place = sps*(h*x+((h+1)/2)*(y&1)+(y>>1)); | ||
568 | read(fd,pkt->data+place, sps); | ||
569 | //DEBUGF("place = %d data[place] = %d\n",place,pkt->data[place]); | ||
570 | } | ||
571 | rmctx->audio_pkt_cnt++; | ||
572 | }while(++(rmctx->sub_packet_cnt) < h); | ||
573 | |||
574 | //return pkt->data; | ||
575 | } | ||
576 | #ifdef DEBUG | ||
577 | void dump_rm_context(RMContext *rmctx) | ||
578 | { | ||
579 | DEBUGF("block_align = %d\n", rmctx->block_align); | ||
580 | DEBUGF("nb_channels = %d\n", rmctx->nb_channels); | ||
581 | DEBUGF("sample_rate = %d\n", rmctx->sample_rate); | ||
582 | DEBUGF("bit_rate = %d\n", rmctx->bit_rate ); | ||
583 | } | ||
584 | #endif | ||