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[kugel-rb.git] / apps / metadata / rm.c
blob63328a3ab1c840a97f25997fbc8b7c2b9daf5ca3
1 /***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2009 Mohamed Tarek
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
19 *
20 ****************************************************************************/
21 #include <stdio.h>
22 #include <string.h>
23 #include <stdlib.h>
24 #include <ctype.h>
25 #include <inttypes.h>
26
27 #include <codecs/librm/rm.h>
28 #include "system.h"
29 #include "metadata.h"
30 #include "metadata_common.h"
31 #include "metadata_parsers.h"
32 #include "logf.h"
33
34 /* Uncomment the following line for debugging */
35 //#define DEBUG_RM
36 #ifndef DEBUG_RM
37 #undef DEBUGF
38 #define DEBUGF(...)
39 #endif
40
41 #define ID3V1_OFFSET -128
42 #define METADATA_FOOTER_OFFSET -140
43
44 static inline void print_cook_extradata(RMContext *rmctx) {
45
46 DEBUGF(" cook_version = 0x%08lx\n", rm_get_uint32be(rmctx->codec_extradata));
47 DEBUGF(" samples_per_frame_per_channel = %d\n", rm_get_uint16be(&rmctx->codec_extradata[4]));
48 DEBUGF(" number_of_subbands_in_freq_domain = %d\n", rm_get_uint16be(&rmctx->codec_extradata[6]));
49 if(rmctx->extradata_size == 16) {
50 DEBUGF(" joint_stereo_subband_start = %d\n",rm_get_uint16be(&rmctx->codec_extradata[12]));
51 DEBUGF(" joint_stereo_vlc_bits = %d\n", rm_get_uint16be(&rmctx->codec_extradata[14]));
52 }
53 }
54
55
56 struct real_object_t
57 {
58 uint32_t fourcc;
59 uint32_t size;
60 uint16_t version;
61 };
62
63 static int real_read_object_header(int fd, struct real_object_t* obj)
64 {
65 int n;
66
67 if ((n = read_uint32be(fd, &obj->fourcc)) <= 0)
68 return n;
69 if ((n = read_uint32be(fd, &obj->size)) <= 0)
70 return n;
71 if ((n = read_uint16be(fd, &obj->version)) <= 0)
72 return n;
73
74 return 1;
75 }
76
77 #if (defined(SIMULATOR) && defined(DEBUG_RM))
78 static char* fourcc2str(uint32_t f)
79 {
80 static char res[5];
81
82 res[0] = (f & 0xff000000) >> 24;
83 res[1] = (f & 0xff0000) >> 16;
84 res[2] = (f & 0xff00) >> 8;
85 res[3] = (f & 0xff);
86 res[4] = 0;
87
88 return res;
89 }
90 #endif
91
92 static inline int real_read_audio_stream_info(int fd, RMContext *rmctx)
93 {
94 int skipped = 0;
95 uint32_t version;
96 struct real_object_t obj;
97 #ifdef SIMULATOR
98 uint32_t header_size;
99 uint16_t flavor;
100 uint32_t coded_framesize;
101 uint8_t interleaver_id_length;
102 uint8_t fourcc_length;
103 #endif
104 uint32_t interleaver_id;
105 uint32_t fourcc = 0;
106
107 memset(&obj,0,sizeof(obj));
108 read_uint32be(fd, &version);
109 skipped += 4;
110
111 DEBUGF(" version=0x%04lx\n",((version >> 16) & 0xff));
112 if (((version >> 16) & 0xff) == 3) {
113 /* Very old version */
114 } else {
115 #ifdef SIMULATOR
116 real_read_object_header(fd, &obj);
117 read_uint32be(fd, &header_size);
118 /* obj.size will be filled with an unknown value, replaced with header_size */
119 DEBUGF(" Object: %s, size: %ld bytes, version: 0x%04x\n",fourcc2str(obj.fourcc),header_size,obj.version);
120
121 read_uint16be(fd, &flavor);
122 read_uint32be(fd, &coded_framesize);
123 #else
124 lseek(fd, 20, SEEK_CUR);
125 #endif
126 lseek(fd, 12, SEEK_CUR); /* unknown */
127 read_uint16be(fd, &rmctx->sub_packet_h);
128 read_uint16be(fd, &rmctx->block_align);
129 read_uint16be(fd, &rmctx->sub_packet_size);
130 lseek(fd, 2, SEEK_CUR); /* unknown */
131 skipped += 40;
132 if (((version >> 16) & 0xff) == 5)
133 {
134 lseek(fd, 6, SEEK_CUR); /* unknown */
135 skipped += 6;
136 }
137 read_uint16be(fd, &rmctx->sample_rate);
138 lseek(fd, 4, SEEK_CUR); /* unknown */
139 read_uint16be(fd, &rmctx->nb_channels);
140 skipped += 8;
141 if (((version >> 16) & 0xff) == 4)
142 {
143 #ifdef SIMULATOR
144 read_uint8(fd, &interleaver_id_length);
145 read_uint32be(fd, &interleaver_id);
146 read_uint8(fd, &fourcc_length);
147 #else
148 lseek(fd, 6, SEEK_CUR);
149 #endif
150 read_uint32be(fd, &fourcc);
151 skipped += 10;
152 }
153 if (((version >> 16) & 0xff) == 5)
154 {
155 read_uint32be(fd, &interleaver_id);
156 read_uint32be(fd, &fourcc);
157 skipped += 8;
158 }
159 lseek(fd, 3, SEEK_CUR); /* unknown */
160 skipped += 3;
161 if (((version >> 16) & 0xff) == 5)
162 {
163 lseek(fd, 1, SEEK_CUR); /* unknown */
164 skipped += 1;
165 }
166
167 switch(fourcc) {
168 case FOURCC('c','o','o','k'):
169 rmctx->codec_type = CODEC_COOK;
170 read_uint32be(fd, &rmctx->extradata_size);
171 skipped += 4;
172 read(fd, rmctx->codec_extradata, rmctx->extradata_size);
173 skipped += rmctx->extradata_size;
174 break;
175
176 case FOURCC('r','a','a','c'):
177 case FOURCC('r','a','c','p'):
178 rmctx->codec_type = CODEC_AAC;
179 read_uint32be(fd, &rmctx->extradata_size);
180 skipped += 4;
181 read(fd, rmctx->codec_extradata, rmctx->extradata_size);
182 skipped += rmctx->extradata_size;
183 break;
184
185 case FOURCC('d','n','e','t'):
186 rmctx->codec_type = CODEC_AC3;
187 break;
188
189 case FOURCC('a','t','r','c'):
190 rmctx->codec_type = CODEC_ATRAC;
191 read_uint32be(fd, &rmctx->extradata_size);
192 skipped += 4;
193 read(fd, rmctx->codec_extradata, rmctx->extradata_size);
194 skipped += rmctx->extradata_size;
195 break;
196
197 default: /* Not a supported codec */
198 return -1;
199 }
200
201 DEBUGF(" flavor = %d\n",flavor);
202 DEBUGF(" coded_frame_size = %ld\n",coded_framesize);
203 DEBUGF(" sub_packet_h = %d\n",rmctx->sub_packet_h);
204 DEBUGF(" frame_size = %d\n",rmctx->block_align);
205 DEBUGF(" sub_packet_size = %d\n",rmctx->sub_packet_size);
206 DEBUGF(" sample_rate= %d\n",rmctx->sample_rate);
207 DEBUGF(" channels= %d\n",rmctx->nb_channels);
208 DEBUGF(" fourcc = %s\n",fourcc2str(fourcc));
209 DEBUGF(" codec_extra_data_length = %ld\n",rmctx->extradata_size);
210 DEBUGF(" codec_extradata :\n");
211 if(rmctx->codec_type == CODEC_COOK) {
212 DEBUGF(" cook_extradata :\n");
213 print_cook_extradata(rmctx);
214 }
215
216 }
217
218 return skipped;
219 }
220
221 static int rm_parse_header(int fd, RMContext *rmctx, struct mp3entry *id3)
222 {
223 struct real_object_t obj;
224 int res;
225 int skipped;
226 off_t curpos;
227 uint8_t len; /* Holds a string_length, which is then passed to read_string() */
228
229 #ifdef SIMULATOR
230 uint32_t avg_bitrate = 0;
231 uint32_t max_packet_size;
232 uint32_t avg_packet_size;
233 uint32_t packet_count;
234 uint32_t duration;
235 uint32_t preroll;
236 uint32_t index_offset;
237 uint16_t stream_id;
238 uint32_t start_time;
239 uint32_t codec_data_size;
240 #endif
241 uint32_t v;
242 uint32_t max_bitrate;
243 uint16_t num_streams;
244 uint32_t next_data_off;
245 uint8_t header_end;
246
247 memset(&obj,0,sizeof(obj));
248 curpos = lseek(fd, 0, SEEK_SET);
249 res = real_read_object_header(fd, &obj);
250
251 if (obj.fourcc == FOURCC('.','r','a',0xfd))
252 {
253 /* Very old .ra format - not yet supported */
254 return -1;
255 }
256 else if (obj.fourcc != FOURCC('.','R','M','F'))
257 {
258 return -1;
259 }
260
261 lseek(fd, 8, SEEK_CUR); /* unknown */
262
263 DEBUGF("Object: %s, size: %d bytes, version: 0x%04x, pos: %d\n",fourcc2str(obj.fourcc),(int)obj.size,obj.version,(int)curpos);
264
265 res = real_read_object_header(fd, &obj);
266 header_end = 0;
267 while(res)
268 {
269 DEBUGF("Object: %s, size: %d bytes, version: 0x%04x, pos: %d\n",fourcc2str(obj.fourcc),(int)obj.size,obj.version,(int)curpos);
270 skipped = 10;
271 if(obj.fourcc == FOURCC('I','N','D','X'))
272 break;
273 switch (obj.fourcc)
274 {
275 case FOURCC('P','R','O','P'): /* File properties */
276 read_uint32be(fd, &max_bitrate);
277 read_uint32be(fd, &rmctx->bit_rate); /*avg bitrate*/
278 #ifdef SIMULATOR
279 read_uint32be(fd, &max_packet_size);
280 read_uint32be(fd, &avg_packet_size);
281 read_uint32be(fd, &packet_count);
282 #else
283 lseek(fd, 3*sizeof(uint32_t), SEEK_CUR);
284 #endif
285 read_uint32be(fd, &rmctx->duration);
286 #ifdef SIMULATOR
287 read_uint32be(fd, &preroll);
288 read_uint32be(fd, &index_offset);
289 #else
290 lseek(fd, 2*sizeof(uint32_t), SEEK_CUR);
291 #endif
292 read_uint32be(fd, &rmctx->data_offset);
293 read_uint16be(fd, &num_streams);
294 read_uint16be(fd, &rmctx->flags);
295 skipped += 40;
296
297 DEBUGF(" max_bitrate = %ld\n",max_bitrate);
298 DEBUGF(" avg_bitrate = %ld\n",rmctx->bit_rate);
299 DEBUGF(" max_packet_size = %ld\n",max_packet_size);
300 DEBUGF(" avg_packet_size = %ld\n",avg_packet_size);
301 DEBUGF(" packet_count = %ld\n",packet_count);
302 DEBUGF(" duration = %ld\n",rmctx->duration);
303 DEBUGF(" preroll = %ld\n",preroll);
304 DEBUGF(" index_offset = %ld\n",index_offset);
305 DEBUGF(" data_offset = %ld\n",rmctx->data_offset);
306 DEBUGF(" num_streams = %d\n",num_streams);
307 DEBUGF(" flags=0x%04x\n",rmctx->flags);
308 break;
309
310 case FOURCC('C','O','N','T'):
311 /* Four strings - Title, Author, Copyright, Comment */
312 read_uint8(fd,&len);
313 skipped += (int)read_string(fd, id3->id3v1buf[0], sizeof(id3->id3v1buf[0]), '\0', len);
314 read_uint8(fd,&len);
315 skipped += (int)read_string(fd, id3->id3v1buf[1], sizeof(id3->id3v1buf[1]), '\0', len);
316 read_uint8(fd,&len);
317 skipped += (int)read_string(fd, id3->id3v1buf[2], sizeof(id3->id3v1buf[2]), '\0', len);
318 read_uint8(fd,&len);
319 skipped += (int)read_string(fd, id3->id3v1buf[3], sizeof(id3->id3v1buf[3]), '\0', len);
320 skipped += 4;
321
322 DEBUGF(" title=\"%s\"\n",id3->id3v1buf[0]);
323 DEBUGF(" author=\"%s\"\n",id3->id3v1buf[1]);
324 DEBUGF(" copyright=\"%s\"\n",id3->id3v1buf[2]);
325 DEBUGF(" comment=\"%s\"\n",id3->id3v1buf[3]);
326 break;
327
328 case FOURCC('M','D','P','R'): /* Media properties */
329 #ifdef SIMULATOR
330 read_uint16be(fd,&stream_id);
331 read_uint32be(fd,&max_bitrate);
332 read_uint32be(fd,&avg_bitrate);
333 read_uint32be(fd,&max_packet_size);
334 read_uint32be(fd,&avg_packet_size);
335 read_uint32be(fd,&start_time);
336 read_uint32be(fd,&preroll);
337 read_uint32be(fd,&duration);
338 #else
339 lseek(fd, 30, SEEK_CUR);
340 #endif
341 skipped += 30;
342 read_uint8(fd,&len);
343 skipped += 1;
344 lseek(fd, len, SEEK_CUR); /* desc */
345 skipped += len;
346 read_uint8(fd,&len);
347 skipped += 1;
348 #ifdef SIMULATOR
349 lseek(fd, len, SEEK_CUR); /* mimetype */
350 read_uint32be(fd,&codec_data_size);
351 #else
352 lseek(fd, len + 4, SEEK_CUR);
353 #endif
354 skipped += len + 4;
355 read_uint32be(fd,&v);
356 skipped += 4;
357
358 DEBUGF(" stream_id = 0x%04x\n",stream_id);
359 DEBUGF(" max_bitrate = %ld\n",max_bitrate);
360 DEBUGF(" avg_bitrate = %ld\n",avg_bitrate);
361 DEBUGF(" max_packet_size = %ld\n",max_packet_size);
362 DEBUGF(" avg_packet_size = %ld\n",avg_packet_size);
363 DEBUGF(" start_time = %ld\n",start_time);
364 DEBUGF(" preroll = %ld\n",preroll);
365 DEBUGF(" duration = %ld\n",duration);
366 DEBUGF(" codec_data_size = %ld\n",codec_data_size);
367 DEBUGF(" v=\"%s\"\n", fourcc2str(v));
368
369 if (v == FOURCC('.','r','a',0xfd))
370 {
371 skipped += real_read_audio_stream_info(fd, rmctx);
372 if(skipped < 0)
373 return -1;
374 }
375
376 break;
377
378 case FOURCC('D','A','T','A'):
379 read_uint32be(fd,&rmctx->nb_packets);
380 skipped += 4;
381 read_uint32be(fd,&next_data_off);
382 skipped += 4;
383
384 /***
385 * nb_packets correction :
386 * in some samples, number of packets may not exactly form
387 * an integer number of scrambling units. This is corrected
388 * by constructing a partially filled unit out of the few
389 * remaining samples at the end of decoding.
390 ***/
391 if(rmctx->nb_packets % rmctx->sub_packet_h)
392 rmctx->nb_packets += rmctx->sub_packet_h - (rmctx->nb_packets % rmctx->sub_packet_h);
393
394 DEBUGF(" data_nb_packets = %ld\n",rmctx->nb_packets);
395 DEBUGF(" next DATA offset = %ld\n",next_data_off);
396 header_end = 1;
397 break;
398 }
399 if(header_end) break;
400 curpos = lseek(fd, obj.size - skipped, SEEK_CUR);
401 res = real_read_object_header(fd, &obj);
402 }
403
404
405 return 0;
406 }
407
408
409 bool get_rm_metadata(int fd, struct mp3entry* id3)
410 {
411 RMContext *rmctx = (RMContext*) (( (intptr_t)id3->id3v2buf + 3 ) &~ 3);
412 memset(rmctx,0,sizeof(RMContext));
413 if(rm_parse_header(fd, rmctx, id3) < 0)
414 return false;
415
416 if (!setid3v1title(fd, id3)) {
417 /* file has no id3v1 tags, use the tags from CONT chunk */
418 id3->title = id3->id3v1buf[0];
419 id3->artist = id3->id3v1buf[1];
420 id3->comment= id3->id3v1buf[3];
421 }
422
423 switch(rmctx->codec_type)
424 {
425 case CODEC_COOK:
426 /* Already set, do nothing */
427 break;
428 case CODEC_AAC:
429 id3->codectype = AFMT_RM_AAC;
430 break;
431
432 case CODEC_AC3:
433 id3->codectype = AFMT_RM_AC3;
434 break;
435
436 case CODEC_ATRAC:
437 id3->codectype = AFMT_RM_ATRAC3;
438 break;
439 }
440
441 id3->channels = rmctx->nb_channels;
442 id3->extradata_size = rmctx->extradata_size;
443 id3->bitrate = rmctx->bit_rate / 1000;
444 id3->frequency = rmctx->sample_rate;
445 id3->length = rmctx->duration;
446 id3->filesize = filesize(fd);
447 return true;
448 }
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