1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000-2009 Josh Coalson
3 * Copyright (C) 2011-2023 Xiph.Org Foundation
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * - Neither the name of the Xiph.org Foundation nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #ifdef HAVE_CONFIG_H
34 # include <config.h>
35 #endif
36
37 #include <stdio.h>
38 #include <string.h> /* for strlen() */
39 #include "private/stream_encoder_framing.h"
40 #include "private/crc.h"
41 #include "FLAC/assert.h"
42 #include "share/compat.h"
43
44 static FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method);
45 static FLAC__bool add_residual_partitioned_rice_(FLAC__BitWriter *bw, const FLAC__int32 residual[], const uint32_t residual_samples, const uint32_t predictor_order, const uint32_t rice_parameters[], const uint32_t raw_bits[], const uint32_t partition_order, const FLAC__bool is_extended);
46
FLAC__add_metadata_block(const FLAC__StreamMetadata * metadata,FLAC__BitWriter * bw,FLAC__bool update_vendor_string)47 FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetadata *metadata, FLAC__BitWriter *bw, FLAC__bool update_vendor_string)
48 {
49 uint32_t i, j, metadata_length;
50 const uint32_t vendor_string_length = (uint32_t)strlen(FLAC__VENDOR_STRING);
51 const uint32_t start_bits = FLAC__bitwriter_get_input_bits_unconsumed(bw);
52
53 FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));
54
55 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->is_last, FLAC__STREAM_METADATA_IS_LAST_LEN))
56 return false;
57
58 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->type, FLAC__STREAM_METADATA_TYPE_LEN))
59 return false;
60
61 /*
62 * First, for VORBIS_COMMENTs, adjust the length to reflect our vendor string
63 */
64 metadata_length = metadata->length;
65 if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT && update_vendor_string) {
66 FLAC__ASSERT(metadata->data.vorbis_comment.vendor_string.length == 0 || 0 != metadata->data.vorbis_comment.vendor_string.entry);
67 metadata_length -= metadata->data.vorbis_comment.vendor_string.length;
68 metadata_length += vendor_string_length;
69 }
70 FLAC__ASSERT(metadata_length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
71 /* double protection */
72 if(metadata_length >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN))
73 return false;
74 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata_length, FLAC__STREAM_METADATA_LENGTH_LEN))
75 return false;
76
77 switch(metadata->type) {
78 case FLAC__METADATA_TYPE_STREAMINFO:
79 FLAC__ASSERT(metadata->data.stream_info.min_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN));
80 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.min_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN))
81 return false;
82 FLAC__ASSERT(metadata->data.stream_info.max_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN));
83 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.max_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
84 return false;
85 FLAC__ASSERT(metadata->data.stream_info.min_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN));
86 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.min_framesize, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
87 return false;
88 FLAC__ASSERT(metadata->data.stream_info.max_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN));
89 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.max_framesize, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
90 return false;
91 FLAC__ASSERT(FLAC__format_sample_rate_is_valid(metadata->data.stream_info.sample_rate));
92 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.sample_rate, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
93 return false;
94 FLAC__ASSERT(metadata->data.stream_info.channels > 0);
95 FLAC__ASSERT(metadata->data.stream_info.channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN));
96 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.channels-1, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
97 return false;
98 FLAC__ASSERT(metadata->data.stream_info.bits_per_sample > 0);
99 FLAC__ASSERT(metadata->data.stream_info.bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
100 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.bits_per_sample-1, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
101 return false;
102 if(metadata->data.stream_info.total_samples >= (FLAC__U64L(1) << FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN)){
103 if(!FLAC__bitwriter_write_raw_uint64(bw, 0, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
104 return false;
105 }else{
106 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
107 return false;
108 }
109 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.stream_info.md5sum, 16))
110 return false;
111 break;
112 case FLAC__METADATA_TYPE_PADDING:
113 if(!FLAC__bitwriter_write_zeroes(bw, metadata->length * 8))
114 return false;
115 break;
116 case FLAC__METADATA_TYPE_APPLICATION:
117 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8))
118 return false;
119 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.data, metadata->length - (FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)))
120 return false;
121 break;
122 case FLAC__METADATA_TYPE_SEEKTABLE:
123 for(i = 0; i < metadata->data.seek_table.num_points; i++) {
124 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].sample_number, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
125 return false;
126 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].stream_offset, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
127 return false;
128 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.seek_table.points[i].frame_samples, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
129 return false;
130 }
131 break;
132 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
133 if(update_vendor_string) {
134 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, vendor_string_length))
135 return false;
136 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)FLAC__VENDOR_STRING, vendor_string_length))
137 return false;
138 }
139 else {
140 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.vendor_string.length))
141 return false;
142 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.vorbis_comment.vendor_string.entry, metadata->data.vorbis_comment.vendor_string.length))
143 return false;
144 }
145 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.num_comments))
146 return false;
147 for(i = 0; i < metadata->data.vorbis_comment.num_comments; i++) {
148 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.comments[i].length))
149 return false;
150 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.vorbis_comment.comments[i].entry, metadata->data.vorbis_comment.comments[i].length))
151 return false;
152 }
153 break;
154 case FLAC__METADATA_TYPE_CUESHEET:
155 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
156 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))
157 return false;
158 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.cue_sheet.lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
159 return false;
160 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.is_cd? 1 : 0, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
161 return false;
162 if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
163 return false;
164 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.num_tracks, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
165 return false;
166 for(i = 0; i < metadata->data.cue_sheet.num_tracks; i++) {
167 const FLAC__StreamMetadata_CueSheet_Track *track = metadata->data.cue_sheet.tracks + i;
168
169 if(!FLAC__bitwriter_write_raw_uint64(bw, track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
170 return false;
171 if(!FLAC__bitwriter_write_raw_uint32(bw, track->number, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
172 return false;
173 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
174 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
175 return false;
176 if(!FLAC__bitwriter_write_raw_uint32(bw, track->type, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
177 return false;
178 if(!FLAC__bitwriter_write_raw_uint32(bw, track->pre_emphasis, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN))
179 return false;
180 if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
181 return false;
182 if(!FLAC__bitwriter_write_raw_uint32(bw, track->num_indices, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN))
183 return false;
184 for(j = 0; j < track->num_indices; j++) {
185 const FLAC__StreamMetadata_CueSheet_Index *indx = track->indices + j;
186
187 if(!FLAC__bitwriter_write_raw_uint64(bw, indx->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
188 return false;
189 if(!FLAC__bitwriter_write_raw_uint32(bw, indx->number, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
190 return false;
191 if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
192 return false;
193 }
194 }
195 break;
196 case FLAC__METADATA_TYPE_PICTURE:
197 {
198 size_t len;
199 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.type, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN))
200 return false;
201 len = strlen(metadata->data.picture.mime_type);
202 if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN))
203 return false;
204 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.picture.mime_type, len))
205 return false;
206 len = strlen((const char *)metadata->data.picture.description);
207 if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN))
208 return false;
209 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.description, len))
210 return false;
211 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN))
212 return false;
213 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN))
214 return false;
215 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN))
216 return false;
217 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN))
218 return false;
219 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.data_length, FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN))
220 return false;
221 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.data, metadata->data.picture.data_length))
222 return false;
223 }
224 break;
225 default:
226 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.unknown.data, metadata->length))
227 return false;
228 break;
229 }
230
231 /* Now check whether metadata block length was correct */
232 {
233 uint32_t length_in_bits = FLAC__bitwriter_get_input_bits_unconsumed(bw);
234 if(length_in_bits < start_bits)
235 return false;
236 length_in_bits -= start_bits;
237 if(length_in_bits % 8 != 0 || length_in_bits != (metadata_length*8+32))
238 return false;
239 }
240
241 FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));
242 return true;
243 }
244
FLAC__frame_add_header(const FLAC__FrameHeader * header,FLAC__BitWriter * bw)245 FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__BitWriter *bw)
246 {
247 uint32_t u, blocksize_hint, sample_rate_hint;
248 FLAC__byte crc;
249
250 FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));
251
252 if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN))
253 return false;
254
255 if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_RESERVED_LEN))
256 return false;
257
258 if(!FLAC__bitwriter_write_raw_uint32(bw, (header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER)? 0 : 1, FLAC__FRAME_HEADER_BLOCKING_STRATEGY_LEN))
259 return false;
260
261 FLAC__ASSERT(header->blocksize > 0 && header->blocksize <= FLAC__MAX_BLOCK_SIZE);
262 /* when this assertion holds true, any legal blocksize can be expressed in the frame header */
263 FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535u);
264 blocksize_hint = 0;
265 switch(header->blocksize) {
266 case 192: u = 1; break;
267 case 576: u = 2; break;
268 case 1152: u = 3; break;
269 case 2304: u = 4; break;
270 case 4608: u = 5; break;
271 case 256: u = 8; break;
272 case 512: u = 9; break;
273 case 1024: u = 10; break;
274 case 2048: u = 11; break;
275 case 4096: u = 12; break;
276 case 8192: u = 13; break;
277 case 16384: u = 14; break;
278 case 32768: u = 15; break;
279 default:
280 if(header->blocksize <= 0x100)
281 blocksize_hint = u = 6;
282 else
283 blocksize_hint = u = 7;
284 break;
285 }
286 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BLOCK_SIZE_LEN))
287 return false;
288
289 FLAC__ASSERT(FLAC__format_sample_rate_is_valid(header->sample_rate));
290 sample_rate_hint = 0;
291 switch(header->sample_rate) {
292 case 88200: u = 1; break;
293 case 176400: u = 2; break;
294 case 192000: u = 3; break;
295 case 8000: u = 4; break;
296 case 16000: u = 5; break;
297 case 22050: u = 6; break;
298 case 24000: u = 7; break;
299 case 32000: u = 8; break;
300 case 44100: u = 9; break;
301 case 48000: u = 10; break;
302 case 96000: u = 11; break;
303 default:
304 if(header->sample_rate <= 255000 && header->sample_rate % 1000 == 0)
305 sample_rate_hint = u = 12;
306 else if(header->sample_rate <= 655350 && header->sample_rate % 10 == 0)
307 sample_rate_hint = u = 14;
308 else if(header->sample_rate <= 0xffff)
309 sample_rate_hint = u = 13;
310 else
311 u = 0;
312 break;
313 }
314 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_SAMPLE_RATE_LEN))
315 return false;
316
317 FLAC__ASSERT(header->channels > 0 && header->channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN) && header->channels <= FLAC__MAX_CHANNELS);
318 switch(header->channel_assignment) {
319 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
320 u = header->channels - 1;
321 break;
322 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
323 FLAC__ASSERT(header->channels == 2);
324 u = 8;
325 break;
326 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
327 FLAC__ASSERT(header->channels == 2);
328 u = 9;
329 break;
330 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
331 FLAC__ASSERT(header->channels == 2);
332 u = 10;
333 break;
334 default:
335 FLAC__ASSERT(0);
336 }
337 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN))
338 return false;
339
340 FLAC__ASSERT(header->bits_per_sample > 0 && header->bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
341 switch(header->bits_per_sample) {
342 case 8 : u = 1; break;
343 case 12: u = 2; break;
344 case 16: u = 4; break;
345 case 20: u = 5; break;
346 case 24: u = 6; break;
347 case 32: u = 7; break;
348 default: u = 0; break;
349 }
350 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN))
351 return false;
352
353 if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_ZERO_PAD_LEN))
354 return false;
355
356 if(header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) {
357 if(!FLAC__bitwriter_write_utf8_uint32(bw, header->number.frame_number))
358 return false;
359 }
360 else {
361 if(!FLAC__bitwriter_write_utf8_uint64(bw, header->number.sample_number))
362 return false;
363 }
364
365 if(blocksize_hint)
366 if(!FLAC__bitwriter_write_raw_uint32(bw, header->blocksize-1, (blocksize_hint==6)? 8:16))
367 return false;
368
369 switch(sample_rate_hint) {
370 case 12:
371 if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 1000, 8))
372 return false;
373 break;
374 case 13:
375 if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate, 16))
376 return false;
377 break;
378 case 14:
379 if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 10, 16))
380 return false;
381 break;
382 }
383
384 /* write the CRC */
385 if(!FLAC__bitwriter_get_write_crc8(bw, &crc))
386 return false;
387 if(!FLAC__bitwriter_write_raw_uint32(bw, crc, FLAC__FRAME_HEADER_CRC_LEN))
388 return false;
389
390 return true;
391 }
392
FLAC__subframe_add_constant(const FLAC__Subframe_Constant * subframe,uint32_t subframe_bps,uint32_t wasted_bits,FLAC__BitWriter * bw)393 FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, uint32_t subframe_bps, uint32_t wasted_bits, FLAC__BitWriter *bw)
394 {
395 FLAC__bool ok;
396
397 ok =
398 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) &&
399 (wasted_bits? FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1) : true) &&
400 FLAC__bitwriter_write_raw_int64(bw, subframe->value, subframe_bps)
401 ;
402
403 return ok;
404 }
405
FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed * subframe,uint32_t residual_samples,uint32_t subframe_bps,uint32_t wasted_bits,FLAC__BitWriter * bw)406 FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, uint32_t residual_samples, uint32_t subframe_bps, uint32_t wasted_bits, FLAC__BitWriter *bw)
407 {
408 uint32_t i;
409
410 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))
411 return false;
412 if(wasted_bits)
413 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
414 return false;
415
416 for(i = 0; i < subframe->order; i++)
417 if(!FLAC__bitwriter_write_raw_int64(bw, subframe->warmup[i], subframe_bps))
418 return false;
419
420 if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method))
421 return false;
422 switch(subframe->entropy_coding_method.type) {
423 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
424 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
425 if(!add_residual_partitioned_rice_(
426 bw,
427 subframe->residual,
428 residual_samples,
429 subframe->order,
430 subframe->entropy_coding_method.data.partitioned_rice.contents->parameters,
431 subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits,
432 subframe->entropy_coding_method.data.partitioned_rice.order,
433 /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
434 ))
435 return false;
436 break;
437 default:
438 FLAC__ASSERT(0);
439 }
440
441 return true;
442 }
443
FLAC__subframe_add_lpc(const FLAC__Subframe_LPC * subframe,uint32_t residual_samples,uint32_t subframe_bps,uint32_t wasted_bits,FLAC__BitWriter * bw)444 FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, uint32_t residual_samples, uint32_t subframe_bps, uint32_t wasted_bits, FLAC__BitWriter *bw)
445 {
446 uint32_t i;
447
448 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))
449 return false;
450 if(wasted_bits)
451 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
452 return false;
453
454 for(i = 0; i < subframe->order; i++)
455 if(!FLAC__bitwriter_write_raw_int64(bw, subframe->warmup[i], subframe_bps))
456 return false;
457
458 if(!FLAC__bitwriter_write_raw_uint32(bw, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
459 return false;
460 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
461 return false;
462 for(i = 0; i < subframe->order; i++)
463 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->qlp_coeff[i], subframe->qlp_coeff_precision))
464 return false;
465
466 if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method))
467 return false;
468 switch(subframe->entropy_coding_method.type) {
469 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
470 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
471 if(!add_residual_partitioned_rice_(
472 bw,
473 subframe->residual,
474 residual_samples,
475 subframe->order,
476 subframe->entropy_coding_method.data.partitioned_rice.contents->parameters,
477 subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits,
478 subframe->entropy_coding_method.data.partitioned_rice.order,
479 /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
480 ))
481 return false;
482 break;
483 default:
484 FLAC__ASSERT(0);
485 }
486
487 return true;
488 }
489
FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim * subframe,uint32_t samples,uint32_t subframe_bps,uint32_t wasted_bits,FLAC__BitWriter * bw)490 FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, uint32_t samples, uint32_t subframe_bps, uint32_t wasted_bits, FLAC__BitWriter *bw)
491 {
492 uint32_t i;
493
494 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))
495 return false;
496 if(wasted_bits)
497 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
498 return false;
499
500 if(subframe->data_type == FLAC__VERBATIM_SUBFRAME_DATA_TYPE_INT32) {
501 const FLAC__int32 *signal = subframe->data.int32;
502
503 FLAC__ASSERT(subframe_bps < 33);
504
505 for(i = 0; i < samples; i++)
506 if(!FLAC__bitwriter_write_raw_int32(bw, signal[i], subframe_bps))
507 return false;
508 }
509 else {
510 const FLAC__int64 *signal = subframe->data.int64;
511
512 FLAC__ASSERT(subframe_bps == 33);
513
514 for(i = 0; i < samples; i++)
515 if(!FLAC__bitwriter_write_raw_int64(bw, (FLAC__int64)signal[i], subframe_bps))
516 return false;
517 }
518
519 return true;
520 }
521
add_entropy_coding_method_(FLAC__BitWriter * bw,const FLAC__EntropyCodingMethod * method)522 FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method)
523 {
524 if(!FLAC__bitwriter_write_raw_uint32(bw, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
525 return false;
526 switch(method->type) {
527 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
528 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
529 if(!FLAC__bitwriter_write_raw_uint32(bw, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
530 return false;
531 break;
532 default:
533 FLAC__ASSERT(0);
534 }
535 return true;
536 }
537
add_residual_partitioned_rice_(FLAC__BitWriter * bw,const FLAC__int32 residual[],const uint32_t residual_samples,const uint32_t predictor_order,const uint32_t rice_parameters[],const uint32_t raw_bits[],const uint32_t partition_order,const FLAC__bool is_extended)538 FLAC__bool add_residual_partitioned_rice_(FLAC__BitWriter *bw, const FLAC__int32 residual[], const uint32_t residual_samples, const uint32_t predictor_order, const uint32_t rice_parameters[], const uint32_t raw_bits[], const uint32_t partition_order, const FLAC__bool is_extended)
539 {
540 const uint32_t plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
541 const uint32_t pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
542
543 if(partition_order == 0) {
544 uint32_t i;
545
546 if(raw_bits[0] == 0) {
547 if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[0], plen))
548 return false;
549 if(!FLAC__bitwriter_write_rice_signed_block(bw, residual, residual_samples, rice_parameters[0]))
550 return false;
551 }
552 else {
553 FLAC__ASSERT(rice_parameters[0] == 0);
554 if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen))
555 return false;
556 if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
557 return false;
558 for(i = 0; i < residual_samples; i++) {
559 if(!FLAC__bitwriter_write_raw_int32(bw, residual[i], raw_bits[0]))
560 return false;
561 }
562 }
563 return true;
564 }
565 else {
566 uint32_t i, j, k = 0, k_last = 0;
567 uint32_t partition_samples;
568 const uint32_t default_partition_samples = (residual_samples+predictor_order) >> partition_order;
569 for(i = 0; i < (1u<<partition_order); i++) {
570 partition_samples = default_partition_samples;
571 if(i == 0)
572 partition_samples -= predictor_order;
573 k += partition_samples;
574 if(raw_bits[i] == 0) {
575 if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[i], plen))
576 return false;
577 if(!FLAC__bitwriter_write_rice_signed_block(bw, residual+k_last, k-k_last, rice_parameters[i]))
578 return false;
579 }
580 else {
581 if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen))
582 return false;
583 if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
584 return false;
585 for(j = k_last; j < k; j++) {
586 if(!FLAC__bitwriter_write_raw_int32(bw, residual[j], raw_bits[i]))
587 return false;
588 }
589 }
590 k_last = k;
591 }
592 return true;
593 }
594 }
595