aboutsummaryrefslogtreecommitdiff
path: root/deps/flac-1.3.2/src/libFLAC/stream_encoder_framing.c
blob: 0929cd7bbd18ca0e204c34f5dfc0e152d9137f0f (plain)
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
/* libFLAC - Free Lossless Audio Codec library
 * Copyright (C) 2000-2009  Josh Coalson
 * Copyright (C) 2011-2016  Xiph.Org Foundation
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of the Xiph.org Foundation nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <stdio.h>
#include <string.h> /* for strlen() */
#include "private/stream_encoder_framing.h"
#include "private/crc.h"
#include "FLAC/assert.h"
#include "share/compat.h"

static FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method);
static FLAC__bool add_residual_partitioned_rice_(FLAC__BitWriter *bw, const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned rice_parameters[], const unsigned raw_bits[], const unsigned partition_order, const FLAC__bool is_extended);

FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetadata *metadata, FLAC__BitWriter *bw)
{
	unsigned i, j;
	const unsigned vendor_string_length = (unsigned)strlen(FLAC__VENDOR_STRING);

	if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->is_last, FLAC__STREAM_METADATA_IS_LAST_LEN))
		return false;

	if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->type, FLAC__STREAM_METADATA_TYPE_LEN))
		return false;

	/*
	 * First, for VORBIS_COMMENTs, adjust the length to reflect our vendor string
	 */
	i = metadata->length;
	if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
		FLAC__ASSERT(metadata->data.vorbis_comment.vendor_string.length == 0 || 0 != metadata->data.vorbis_comment.vendor_string.entry);
		i -= metadata->data.vorbis_comment.vendor_string.length;
		i += vendor_string_length;
	}
	FLAC__ASSERT(i < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
	/* double protection */
	if(i >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN))
		return false;
	if(!FLAC__bitwriter_write_raw_uint32(bw, i, FLAC__STREAM_METADATA_LENGTH_LEN))
		return false;

	switch(metadata->type) {
		case FLAC__METADATA_TYPE_STREAMINFO:
			FLAC__ASSERT(metadata->data.stream_info.min_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN));
			if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.min_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN))
				return false;
			FLAC__ASSERT(metadata->data.stream_info.max_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN));
			if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.max_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
				return false;
			FLAC__ASSERT(metadata->data.stream_info.min_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN));
			if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.min_framesize, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
				return false;
			FLAC__ASSERT(metadata->data.stream_info.max_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN));
			if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.max_framesize, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
				return false;
			FLAC__ASSERT(FLAC__format_sample_rate_is_valid(metadata->data.stream_info.sample_rate));
			if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.sample_rate, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
				return false;
			FLAC__ASSERT(metadata->data.stream_info.channels > 0);
			FLAC__ASSERT(metadata->data.stream_info.channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN));
			if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.channels-1, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
				return false;
			FLAC__ASSERT(metadata->data.stream_info.bits_per_sample > 0);
			FLAC__ASSERT(metadata->data.stream_info.bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
			if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.bits_per_sample-1, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
				return false;
			FLAC__ASSERT(metadata->data.stream_info.total_samples < (FLAC__U64L(1) << FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN));
			if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
				return false;
			if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.stream_info.md5sum, 16))
				return false;
			break;
		case FLAC__METADATA_TYPE_PADDING:
			if(!FLAC__bitwriter_write_zeroes(bw, metadata->length * 8))
				return false;
			break;
		case FLAC__METADATA_TYPE_APPLICATION:
			if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8))
				return false;
			if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.data, metadata->length - (FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)))
				return false;
			break;
		case FLAC__METADATA_TYPE_SEEKTABLE:
			for(i = 0; i < metadata->data.seek_table.num_points; i++) {
				if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].sample_number, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
					return false;
				if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].stream_offset, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.seek_table.points[i].frame_samples, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
					return false;
			}
			break;
		case FLAC__METADATA_TYPE_VORBIS_COMMENT:
			if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, vendor_string_length))
				return false;
			if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)FLAC__VENDOR_STRING, vendor_string_length))
				return false;
			if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.num_comments))
				return false;
			for(i = 0; i < metadata->data.vorbis_comment.num_comments; i++) {
				if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.comments[i].length))
					return false;
				if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.vorbis_comment.comments[i].entry, metadata->data.vorbis_comment.comments[i].length))
					return false;
			}
			break;
		case FLAC__METADATA_TYPE_CUESHEET:
			FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
			if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.cue_sheet.media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8))
				return false;
			if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.cue_sheet.lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
				return false;
			if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.is_cd? 1 : 0, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
				return false;
			if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
				return false;
			if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.num_tracks, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
				return false;
			for(i = 0; i < metadata->data.cue_sheet.num_tracks; i++) {
				const FLAC__StreamMetadata_CueSheet_Track *track = metadata->data.cue_sheet.tracks + i;

				if(!FLAC__bitwriter_write_raw_uint64(bw, track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, track->number, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
					return false;
				FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
				if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, track->type, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, track->pre_emphasis, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN))
					return false;
				if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, track->num_indices, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN))
					return false;
				for(j = 0; j < track->num_indices; j++) {
					const FLAC__StreamMetadata_CueSheet_Index *indx = track->indices + j;

					if(!FLAC__bitwriter_write_raw_uint64(bw, indx->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
						return false;
					if(!FLAC__bitwriter_write_raw_uint32(bw, indx->number, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
						return false;
					if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
						return false;
				}
			}
			break;
		case FLAC__METADATA_TYPE_PICTURE:
			{
				size_t len;
				if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.type, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN))
					return false;
				len = strlen(metadata->data.picture.mime_type);
				if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN))
					return false;
				if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.picture.mime_type, len))
					return false;
				len = strlen((const char *)metadata->data.picture.description);
				if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN))
					return false;
				if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.description, len))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.data_length, FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN))
					return false;
				if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.data, metadata->data.picture.data_length))
					return false;
			}
			break;
		default:
			if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.unknown.data, metadata->length))
				return false;
			break;
	}

	FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));
	return true;
}

FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__BitWriter *bw)
{
	unsigned u, blocksize_hint, sample_rate_hint;
	FLAC__byte crc;

	FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));

	if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN))
		return false;

	if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_RESERVED_LEN))
		return false;

	if(!FLAC__bitwriter_write_raw_uint32(bw, (header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER)? 0 : 1, FLAC__FRAME_HEADER_BLOCKING_STRATEGY_LEN))
		return false;

	FLAC__ASSERT(header->blocksize > 0 && header->blocksize <= FLAC__MAX_BLOCK_SIZE);
	/* when this assertion holds true, any legal blocksize can be expressed in the frame header */
	FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535u);
	blocksize_hint = 0;
	switch(header->blocksize) {
		case   192: u = 1; break;
		case   576: u = 2; break;
		case  1152: u = 3; break;
		case  2304: u = 4; break;
		case  4608: u = 5; break;
		case   256: u = 8; break;
		case   512: u = 9; break;
		case  1024: u = 10; break;
		case  2048: u = 11; break;
		case  4096: u = 12; break;
		case  8192: u = 13; break;
		case 16384: u = 14; break;
		case 32768: u = 15; break;
		default:
			if(header->blocksize <= 0x100)
				blocksize_hint = u = 6;
			else
				blocksize_hint = u = 7;
			break;
	}
	if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BLOCK_SIZE_LEN))
		return false;

	FLAC__ASSERT(FLAC__format_sample_rate_is_valid(header->sample_rate));
	sample_rate_hint = 0;
	switch(header->sample_rate) {
		case  88200: u = 1; break;
		case 176400: u = 2; break;
		case 192000: u = 3; break;
		case   8000: u = 4; break;
		case  16000: u = 5; break;
		case  22050: u = 6; break;
		case  24000: u = 7; break;
		case  32000: u = 8; break;
		case  44100: u = 9; break;
		case  48000: u = 10; break;
		case  96000: u = 11; break;
		default:
			if(header->sample_rate <= 255000 && header->sample_rate % 1000 == 0)
				sample_rate_hint = u = 12;
			else if(header->sample_rate % 10 == 0)
				sample_rate_hint = u = 14;
			else if(header->sample_rate <= 0xffff)
				sample_rate_hint = u = 13;
			else
				u = 0;
			break;
	}
	if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_SAMPLE_RATE_LEN))
		return false;

	FLAC__ASSERT(header->channels > 0 && header->channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN) && header->channels <= FLAC__MAX_CHANNELS);
	switch(header->channel_assignment) {
		case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
			u = header->channels - 1;
			break;
		case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
			FLAC__ASSERT(header->channels == 2);
			u = 8;
			break;
		case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
			FLAC__ASSERT(header->channels == 2);
			u = 9;
			break;
		case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
			FLAC__ASSERT(header->channels == 2);
			u = 10;
			break;
		default:
			FLAC__ASSERT(0);
	}
	if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN))
		return false;

	FLAC__ASSERT(header->bits_per_sample > 0 && header->bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
	switch(header->bits_per_sample) {
		case 8 : u = 1; break;
		case 12: u = 2; break;
		case 16: u = 4; break;
		case 20: u = 5; break;
		case 24: u = 6; break;
		default: u = 0; break;
	}
	if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN))
		return false;

	if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_ZERO_PAD_LEN))
		return false;

	if(header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) {
		if(!FLAC__bitwriter_write_utf8_uint32(bw, header->number.frame_number))
			return false;
	}
	else {
		if(!FLAC__bitwriter_write_utf8_uint64(bw, header->number.sample_number))
			return false;
	}

	if(blocksize_hint)
		if(!FLAC__bitwriter_write_raw_uint32(bw, header->blocksize-1, (blocksize_hint==6)? 8:16))
			return false;

	switch(sample_rate_hint) {
		case 12:
			if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 1000, 8))
				return false;
			break;
		case 13:
			if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate, 16))
				return false;
			break;
		case 14:
			if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 10, 16))
				return false;
			break;
	}

	/* write the CRC */
	if(!FLAC__bitwriter_get_write_crc8(bw, &crc))
		return false;
	if(!FLAC__bitwriter_write_raw_uint32(bw, crc, FLAC__FRAME_HEADER_CRC_LEN))
		return false;

	return true;
}

FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
{
	FLAC__bool ok;

	ok =
		FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_CONSTANT_BYTE_ALIGNED_MASK | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN) &&
		(wasted_bits? FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1) : true) &&
		FLAC__bitwriter_write_raw_int32(bw, subframe->value, subframe_bps)
	;

	return ok;
}

FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
{
	unsigned i;

	if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_FIXED_BYTE_ALIGNED_MASK | (subframe->order<<1) | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN))
		return false;
	if(wasted_bits)
		if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
			return false;

	for(i = 0; i < subframe->order; i++)
		if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps))
			return false;

	if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method))
		return false;
	switch(subframe->entropy_coding_method.type) {
		case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
		case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
			if(!add_residual_partitioned_rice_(
				bw,
				subframe->residual,
				residual_samples,
				subframe->order,
				subframe->entropy_coding_method.data.partitioned_rice.contents->parameters,
				subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits,
				subframe->entropy_coding_method.data.partitioned_rice.order,
				/*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
			))
				return false;
			break;
		default:
			FLAC__ASSERT(0);
	}

	return true;
}

FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
{
	unsigned i;

	if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_LPC_BYTE_ALIGNED_MASK | ((subframe->order-1)<<1) | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN))
		return false;
	if(wasted_bits)
		if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
			return false;

	for(i = 0; i < subframe->order; i++)
		if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps))
			return false;

	if(!FLAC__bitwriter_write_raw_uint32(bw, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
		return false;
	if(!FLAC__bitwriter_write_raw_int32(bw, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
		return false;
	for(i = 0; i < subframe->order; i++)
		if(!FLAC__bitwriter_write_raw_int32(bw, subframe->qlp_coeff[i], subframe->qlp_coeff_precision))
			return false;

	if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method))
		return false;
	switch(subframe->entropy_coding_method.type) {
		case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
		case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
			if(!add_residual_partitioned_rice_(
				bw,
				subframe->residual,
				residual_samples,
				subframe->order,
				subframe->entropy_coding_method.data.partitioned_rice.contents->parameters,
				subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits,
				subframe->entropy_coding_method.data.partitioned_rice.order,
				/*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
			))
				return false;
			break;
		default:
			FLAC__ASSERT(0);
	}

	return true;
}

FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, unsigned samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
{
	unsigned i;
	const FLAC__int32 *signal = subframe->data;

	if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__SUBFRAME_TYPE_VERBATIM_BYTE_ALIGNED_MASK | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN))
		return false;
	if(wasted_bits)
		if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
			return false;

	for(i = 0; i < samples; i++)
		if(!FLAC__bitwriter_write_raw_int32(bw, signal[i], subframe_bps))
			return false;

	return true;
}

FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method)
{
	if(!FLAC__bitwriter_write_raw_uint32(bw, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
		return false;
	switch(method->type) {
		case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
		case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
			if(!FLAC__bitwriter_write_raw_uint32(bw, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
				return false;
			break;
		default:
			FLAC__ASSERT(0);
	}
	return true;
}

FLAC__bool add_residual_partitioned_rice_(FLAC__BitWriter *bw, const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned rice_parameters[], const unsigned raw_bits[], const unsigned partition_order, const FLAC__bool is_extended)
{
	const unsigned plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
	const unsigned pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;

	if(partition_order == 0) {
		unsigned i;

		if(raw_bits[0] == 0) {
			if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[0], plen))
				return false;
			if(!FLAC__bitwriter_write_rice_signed_block(bw, residual, residual_samples, rice_parameters[0]))
				return false;
		}
		else {
			FLAC__ASSERT(rice_parameters[0] == 0);
			if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen))
				return false;
			if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
				return false;
			for(i = 0; i < residual_samples; i++) {
				if(!FLAC__bitwriter_write_raw_int32(bw, residual[i], raw_bits[0]))
					return false;
			}
		}
		return true;
	}
	else {
		unsigned i, j, k = 0, k_last = 0;
		unsigned partition_samples;
		const unsigned default_partition_samples = (residual_samples+predictor_order) >> partition_order;
		for(i = 0; i < (1u<<partition_order); i++) {
			partition_samples = default_partition_samples;
			if(i == 0)
				partition_samples -= predictor_order;
			k += partition_samples;
			if(raw_bits[i] == 0) {
				if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[i], plen))
					return false;
				if(!FLAC__bitwriter_write_rice_signed_block(bw, residual+k_last, k-k_last, rice_parameters[i]))
					return false;
			}
			else {
				if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen))
					return false;
				if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
					return false;
				for(j = k_last; j < k; j++) {
					if(!FLAC__bitwriter_write_raw_int32(bw, residual[j], raw_bits[i]))
						return false;
				}
			}
			k_last = k;
		}
		return true;
	}
}