aboutsummaryrefslogtreecommitdiffstats
path: root/src/inputPlugins/flac_plugin.c
blob: 350e47047b33b3238b73155915cb71620a7e42db (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
/* the Music Player Daemon (MPD)
 * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
 * This project's homepage is: http://www.musicpd.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "_flac_common.h"

#ifdef HAVE_FLAC

#include "../utils.h"
#include "../log.h"
#include "../pcm_utils.h"
#include "../inputStream.h"
#include "../outputBuffer.h"
#include "../replayGain.h"
#include "../audio.h"
#include "../os_compat.h"

/* this code was based on flac123, from flac-tools */

static flac_read_status flacRead(const flac_decoder * flacDec,
                                  FLAC__byte buf[],
				  flac_read_status_size_t *bytes,
				  void *fdata)
{
	FlacData *data = (FlacData *) fdata;
	size_t r;

	while (1) {
		r = readFromInputStream(data->inStream, (void *)buf, 1, *bytes);
		if (r == 0 && !inputStreamAtEOF(data->inStream) &&
		    !data->dc->stop)
			my_usleep(10000);
		else
			break;
	}
	*bytes = r;

	if (r == 0 && !data->dc->stop) {
		if (inputStreamAtEOF(data->inStream))
			return flac_read_status_eof;
		else
			return flac_read_status_abort;
	}
	return flac_read_status_continue;
}

static flac_seek_status flacSeek(const flac_decoder * flacDec,
				 FLAC__uint64 offset,
				 void *fdata)
{
	FlacData *data = (FlacData *) fdata;

	if (seekInputStream(data->inStream, offset, SEEK_SET) < 0) {
		return flac_seek_status_error;
	}

	return flac_seek_status_ok;
}

static flac_tell_status flacTell(const flac_decoder * flacDec,
				 FLAC__uint64 * offset,
				 void *fdata)
{
	FlacData *data = (FlacData *) fdata;

	*offset = (long)(data->inStream->offset);

	return flac_tell_status_ok;
}

static flac_length_status flacLength(const flac_decoder * flacDec,
				     FLAC__uint64 * length,
				     void *fdata)
{
	FlacData *data = (FlacData *) fdata;

	*length = (size_t) (data->inStream->size);

	return flac_length_status_ok;
}

static FLAC__bool flacEOF(const flac_decoder * flacDec, void *fdata)
{
	FlacData *data = (FlacData *) fdata;

	if (inputStreamAtEOF(data->inStream) == 1)
		return true;
	return false;
}

static void flacError(const flac_decoder *dec,
		      FLAC__StreamDecoderErrorStatus status, void *fdata)
{
	flac_error_common_cb("flac", status, (FlacData *) fdata);
}

#if !defined(FLAC_API_VERSION_CURRENT) || FLAC_API_VERSION_CURRENT <= 7
static void flacPrintErroredState(FLAC__SeekableStreamDecoderState state)
{
	const char *str = ""; /* "" to silence compiler warning */
	switch (state) {
	case FLAC__SEEKABLE_STREAM_DECODER_OK:
	case FLAC__SEEKABLE_STREAM_DECODER_SEEKING:
	case FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM:
		return;
	case FLAC__SEEKABLE_STREAM_DECODER_MEMORY_ALLOCATION_ERROR:
		str = "allocation error";
		break;
	case FLAC__SEEKABLE_STREAM_DECODER_READ_ERROR:
		str = "read error";
		break;
	case FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR:
		str = "seek error";
		break;
	case FLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR:
		str = "seekable stream error";
		break;
	case FLAC__SEEKABLE_STREAM_DECODER_ALREADY_INITIALIZED:
		str = "decoder already initialized";
		break;
	case FLAC__SEEKABLE_STREAM_DECODER_INVALID_CALLBACK:
		str = "invalid callback";
		break;
	case FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED:
		str = "decoder uninitialized";
	}
	ERROR("flac %s\n", str);
}

static int flac_init(FLAC__SeekableStreamDecoder *dec,
                     FLAC__SeekableStreamDecoderReadCallback read_cb,
                     FLAC__SeekableStreamDecoderSeekCallback seek_cb,
                     FLAC__SeekableStreamDecoderTellCallback tell_cb,
                     FLAC__SeekableStreamDecoderLengthCallback length_cb,
                     FLAC__SeekableStreamDecoderEofCallback eof_cb,
                     FLAC__SeekableStreamDecoderWriteCallback write_cb,
                     FLAC__SeekableStreamDecoderMetadataCallback metadata_cb,
                     FLAC__SeekableStreamDecoderErrorCallback error_cb,
                     void *data)
{
	int s = 1;
	s &= FLAC__seekable_stream_decoder_set_read_callback(dec, read_cb);
	s &= FLAC__seekable_stream_decoder_set_seek_callback(dec, seek_cb);
	s &= FLAC__seekable_stream_decoder_set_tell_callback(dec, tell_cb);
	s &= FLAC__seekable_stream_decoder_set_length_callback(dec, length_cb);
	s &= FLAC__seekable_stream_decoder_set_eof_callback(dec, eof_cb);
	s &= FLAC__seekable_stream_decoder_set_write_callback(dec, write_cb);
	s &= FLAC__seekable_stream_decoder_set_metadata_callback(dec,
	                                                         metadata_cb);
	s &= FLAC__seekable_stream_decoder_set_metadata_respond(dec,
	                                  FLAC__METADATA_TYPE_VORBIS_COMMENT);
	s &= FLAC__seekable_stream_decoder_set_error_callback(dec, error_cb);
	s &= FLAC__seekable_stream_decoder_set_client_data(dec, data);
	if (!s || (FLAC__seekable_stream_decoder_init(dec) !=
	           FLAC__SEEKABLE_STREAM_DECODER_OK))
		return 0;
	return 1;
}
#else /* FLAC_API_VERSION_CURRENT >= 7 */
static void flacPrintErroredState(FLAC__StreamDecoderState state)
{
	const char *str = ""; /* "" to silence compiler warning */
	switch (state) {
	case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
	case FLAC__STREAM_DECODER_READ_METADATA:
	case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
	case FLAC__STREAM_DECODER_READ_FRAME:
	case FLAC__STREAM_DECODER_END_OF_STREAM:
		return;
	case FLAC__STREAM_DECODER_OGG_ERROR:
		str = "error in the Ogg layer";
		break;
	case FLAC__STREAM_DECODER_SEEK_ERROR:
		str = "seek error";
		break;
	case FLAC__STREAM_DECODER_ABORTED:
		str = "decoder aborted by read";
		break;
	case FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR:
		str = "allocation error";
		break;
	case FLAC__STREAM_DECODER_UNINITIALIZED:
		str = "decoder uninitialized";
	}
	ERROR("flac %s\n", str);
}
#endif /* FLAC_API_VERSION_CURRENT >= 7 */

static void flacMetadata(const flac_decoder * dec,
			 const FLAC__StreamMetadata * block, void *vdata)
{
	flac_metadata_common_cb(block, (FlacData *) vdata);
}

static void flac_convert(unsigned char *dest,
			 const FLAC__Frame * frame,
			 unsigned int bytes_per_sample,
			 const FLAC__int32 * const buf[],
			 unsigned int position, unsigned int end)
{
	unsigned int c_chan, i;
	FLAC__uint16 u16;
	unsigned char *uc;

	for (; position < end; ++position) {
		for (c_chan = 0; c_chan < frame->header.channels; c_chan++) {
			u16 = buf[c_chan][position];
			uc = (unsigned char *)&u16;
			for (i = 0; i < bytes_per_sample; i++) {
				*dest++ = *uc++;
			}
		}
	}
}

static FLAC__StreamDecoderWriteStatus flacWrite(const flac_decoder *dec,
                                                const FLAC__Frame * frame,
						const FLAC__int32 * const buf[],
						void *vdata)
{
	FlacData *data = (FlacData *) vdata;
	FLAC__uint32 samples = frame->header.blocksize;
	unsigned int c_samp;
	const unsigned int bytes_per_sample = (data->dc->audioFormat.bits / 8);
	const unsigned int bytes_per_channel =
		bytes_per_sample * frame->header.channels;
	const unsigned int max_samples = FLAC_CHUNK_SIZE / bytes_per_channel;
	unsigned int num_samples;
	float timeChange;
	FLAC__uint64 newPosition = 0;

	assert(data->dc->audioFormat.bits > 0);

	timeChange = ((float)samples) / frame->header.sample_rate;
	data->time += timeChange;

	flac_get_decode_position(dec, &newPosition);
	if (data->position) {
		assert(newPosition >= data->position);
		assert(timeChange >= 0);

		data->bitRate =
		    ((newPosition - data->position) * 8.0 / timeChange)
		    / 1000 + 0.5;
	}
	data->position = newPosition;

	for (c_samp = 0; c_samp < frame->header.blocksize;
	     c_samp += num_samples) {
		num_samples = frame->header.blocksize - c_samp;
		if (num_samples > max_samples)
			num_samples = max_samples;

		flac_convert(data->chunk + data->chunk_length,
			     frame, bytes_per_sample, buf,
			     c_samp, c_samp + num_samples);
		data->chunk_length = num_samples;

		if (flacSendChunk(data) < 0) {
			return
				FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
		}
		data->chunk_length = 0;
		if (data->dc->seek) {
			return
				FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
		}
	}

	return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}

static MpdTag *flacMetadataDup(char *file, int *vorbisCommentFound)
{
	MpdTag *ret = NULL;
	FLAC__Metadata_SimpleIterator *it;
	FLAC__StreamMetadata *block = NULL;

	*vorbisCommentFound = 0;

	it = FLAC__metadata_simple_iterator_new();
	if (!FLAC__metadata_simple_iterator_init(it, file, 1, 0)) {
		const char *err;
		FLAC_API FLAC__Metadata_SimpleIteratorStatus s;

		s = FLAC__metadata_simple_iterator_status(it);

		switch (s) { /* slightly more human-friendly messages: */
		case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
			err = "illegal input";
			break;
		case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
			err = "error opening file";
			break;
		case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
			err = "not a FLAC file";
			break;
		default:
			err = FLAC__Metadata_SimpleIteratorStatusString[s];
		}
		DEBUG("flacMetadataDup: Reading '%s' "
		      "metadata gave the following error: %s\n",
		      file, err);
		FLAC__metadata_simple_iterator_delete(it);
		return ret;
	}

	do {
		block = FLAC__metadata_simple_iterator_get_block(it);
		if (!block)
			break;
		if (block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
			ret = copyVorbisCommentBlockToMpdTag(block, ret);

			if (ret)
				*vorbisCommentFound = 1;
		} else if (block->type == FLAC__METADATA_TYPE_STREAMINFO) {
			if (!ret)
				ret = newMpdTag();
			ret->time = ((float)block->data.stream_info.
				     total_samples) /
			    block->data.stream_info.sample_rate + 0.5;
		}
		FLAC__metadata_object_delete(block);
	} while (FLAC__metadata_simple_iterator_next(it));

	FLAC__metadata_simple_iterator_delete(it);
	return ret;
}

static MpdTag *flacTagDup(char *file)
{
	MpdTag *ret = NULL;
	int foundVorbisComment = 0;

	ret = flacMetadataDup(file, &foundVorbisComment);
	if (!ret) {
		DEBUG("flacTagDup: Failed to grab information from: %s\n",
		      file);
		return NULL;
	}
	if (!foundVorbisComment) {
		MpdTag *temp = id3Dup(file);
		if (temp) {
			temp->time = ret->time;
			freeMpdTag(ret);
			ret = temp;
		}
	}

	return ret;
}

static int flac_decode_internal(OutputBuffer * cb, DecoderControl * dc,
                               InputStream * inStream, int is_ogg)
{
	flac_decoder *flacDec;
	FlacData data;
	const char *err = NULL;

	if (!(flacDec = flac_new()))
		return -1;
	init_FlacData(&data, cb, dc, inStream);

#if defined(FLAC_API_VERSION_CURRENT) && FLAC_API_VERSION_CURRENT > 7
        if(!FLAC__stream_decoder_set_metadata_respond(flacDec, FLAC__METADATA_TYPE_VORBIS_COMMENT))
        {
                DEBUG(__FILE__": Failed to set metadata respond\n");
        }
#endif


	if (is_ogg) {
		if (!flac_ogg_init(flacDec, flacRead, flacSeek, flacTell,
		                   flacLength, flacEOF, flacWrite, flacMetadata,
			           flacError, (void *)&data)) {
			err = "doing Ogg init()";
			goto fail;
		}
	} else {
		if (!flac_init(flacDec, flacRead, flacSeek, flacTell,
		               flacLength, flacEOF, flacWrite, flacMetadata,
			       flacError, (void *)&data)) {
			err = "doing init()";
			goto fail;
		}
		if (!flac_process_metadata(flacDec)) {
			err = "problem reading metadata";
			goto fail;
		}
	}

	dc->state = DECODE_STATE_DECODE;

	while (1) {
		if (!flac_process_single(flacDec))
			break;
		if (flac_get_state(flacDec) == flac_decoder_eof)
			break;
		if (dc->seek) {
			FLAC__uint64 sampleToSeek = dc->seekWhere *
			    dc->audioFormat.sampleRate + 0.5;
			if (flac_seek_absolute(flacDec, sampleToSeek)) {
				clearOutputBuffer(cb);
				data.time = ((float)sampleToSeek) /
				    dc->audioFormat.sampleRate;
				data.position = 0;
			} else
				dc->seekError = 1;
			dc->seek = 0;
			decoder_wakeup_player();
		}
	}
	if (!dc->stop) {
		flacPrintErroredState(flac_get_state(flacDec));
		flac_finish(flacDec);
	}
	/* send last little bit */
	if (data.chunk_length > 0 && !dc->stop) {
		flacSendChunk(&data);
		flushOutputBuffer(data.cb);
	}

fail:
	if (data.replayGainInfo)
		freeReplayGainInfo(data.replayGainInfo);

	if (flacDec)
		flac_delete(flacDec);

	if (err) {
		ERROR("flac %s\n", err);
		return -1;
	}
	return 0;
}

static int flac_decode(OutputBuffer * cb, DecoderControl * dc,
                       InputStream * inStream)
{
	return flac_decode_internal(cb, dc, inStream, 0);
}

#if !defined(FLAC_API_VERSION_CURRENT) || FLAC_API_VERSION_CURRENT <= 7
#  define flac_plugin_init NULL
#else /* FLAC_API_VERSION_CURRENT >= 7 */
/* some of this stuff is duplicated from oggflac_plugin.c */
extern InputPlugin oggflacPlugin;

static MpdTag *oggflac_tag_dup(char *file)
{
	MpdTag *ret = NULL;
	FLAC__Metadata_Iterator *it;
	FLAC__StreamMetadata *block;
	FLAC__Metadata_Chain *chain = FLAC__metadata_chain_new();

	if (!(FLAC__metadata_chain_read_ogg(chain, file)))
		goto out;
	it = FLAC__metadata_iterator_new();
	FLAC__metadata_iterator_init(it, chain);
	do {
		if (!(block = FLAC__metadata_iterator_get_block(it)))
			break;
		if (block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
			ret = copyVorbisCommentBlockToMpdTag(block, ret);
		} else if (block->type == FLAC__METADATA_TYPE_STREAMINFO) {
			if (!ret)
				ret = newMpdTag();
			ret->time = ((float)block->data.stream_info.
				     total_samples) /
			    block->data.stream_info.sample_rate + 0.5;
		}
	} while (FLAC__metadata_iterator_next(it));
	FLAC__metadata_iterator_delete(it);
out:
	FLAC__metadata_chain_delete(chain);
	return ret;
}

static int oggflac_decode(OutputBuffer * cb, DecoderControl * dc,
		          InputStream * inStream)
{
	return flac_decode_internal(cb, dc, inStream, 1);
}

static unsigned int oggflac_try_decode(InputStream * inStream)
{
	return (ogg_stream_type_detect(inStream) == FLAC) ? 1 : 0;
}

static const char *oggflac_suffixes[] = { "ogg", "oga", NULL };
static const char *oggflac_mime_types[] = { "audio/x-flac+ogg",
					    "application/ogg",
					    "application/x-ogg",
					    NULL };

static int flac_plugin_init(void)
{
	if (!FLAC_API_SUPPORTS_OGG_FLAC) {
		DEBUG("libFLAC does not support OggFLAC\n");
		return 1;
	}
	DEBUG("libFLAC supports OggFLAC, initializing OggFLAC support\n");
	assert(oggflacPlugin.name == NULL);
	oggflacPlugin.name = "oggflac";
	oggflacPlugin.tryDecodeFunc = oggflac_try_decode;
	oggflacPlugin.streamDecodeFunc = oggflac_decode;
	oggflacPlugin.tagDupFunc = oggflac_tag_dup;
	oggflacPlugin.streamTypes = INPUT_PLUGIN_STREAM_URL |
	                            INPUT_PLUGIN_STREAM_FILE;
	oggflacPlugin.suffixes = oggflac_suffixes;
	oggflacPlugin.mimeTypes = oggflac_mime_types;
	loadInputPlugin(&oggflacPlugin);
	return 1;
}

#endif /* FLAC_API_VERSION_CURRENT >= 7 */

static const char *flacSuffixes[] = { "flac", NULL };
static const char *flac_mime_types[] = { "audio/x-flac",
					 "application/x-flac",
					 NULL };

InputPlugin flacPlugin = {
	"flac",
	flac_plugin_init,
	NULL,
	NULL,
	flac_decode,
	NULL,
	flacTagDup,
	INPUT_PLUGIN_STREAM_URL | INPUT_PLUGIN_STREAM_FILE,
	flacSuffixes,
	flac_mime_types
};

#else /* !HAVE_FLAC */

InputPlugin flacPlugin;

#endif /* HAVE_FLAC */