1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007 Josh Coalson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #include <stdlib.h> /* for malloc() */
37 #include <string.h> /* for memcpy(), memset() */
39 #include <winsock.h> /* for ntohl() */
40 #elif defined FLAC__SYS_DARWIN
41 #include <machine/endian.h> /* for ntohl() */
43 #include <netinet/in.h> /* for ntohl() */
46 #include "private/bitmath.h"
48 #include "private/bitwriter.h"
49 #include "private/crc.h"
50 #include "FLAC/assert.h"
52 /* Things should be fastest when this matches the machine word size */
53 /* WATCHOUT: if you change this you must also change the following #defines down to SWAP_BE_WORD_TO_HOST below to match */
54 /* WATCHOUT: there are a few places where the code will not work unless bwword is >= 32 bits wide */
55 typedef FLAC__uint32 bwword;
56 #define FLAC__BYTES_PER_WORD 4
57 #define FLAC__BITS_PER_WORD 32
58 #define FLAC__WORD_ALL_ONES ((FLAC__uint32)0xffffffff)
59 /* SWAP_BE_WORD_TO_HOST swaps bytes in a bwword (which is always big-endian) if necessary to match host byte order */
61 #define SWAP_BE_WORD_TO_HOST(x) (x)
64 #define SWAP_BE_WORD_TO_HOST(x) local_swap32_(x)
66 #define SWAP_BE_WORD_TO_HOST(x) ntohl(x)
71 * The default capacity here doesn't matter too much. The buffer always grows
72 * to hold whatever is written to it. Usually the encoder will stop adding at
73 * a frame or metadata block, then write that out and clear the buffer for the
76 static const unsigned FLAC__BITWRITER_DEFAULT_CAPACITY = 32768u / sizeof(bwword); /* size in words */
77 /* When growing, increment 4K at a time */
78 static const unsigned FLAC__BITWRITER_DEFAULT_INCREMENT = 4096u / sizeof(bwword); /* size in words */
80 #define FLAC__WORDS_TO_BITS(words) ((words) * FLAC__BITS_PER_WORD)
81 #define FLAC__TOTAL_BITS(bw) (FLAC__WORDS_TO_BITS((bw)->words) + (bw)->bits)
86 #define min(x,y) ((x)<(y)?(x):(y))
88 /* adjust for compilers that can't understand using LLU suffix for uint64_t literals */
90 #define FLAC__U64L(x) x
92 #define FLAC__U64L(x) x##LLU
99 struct FLAC__BitWriter {
101 bwword accum; /* accumulator; bits are right-justified; when full, accum is appended to buffer */
102 unsigned capacity; /* capacity of buffer in words */
103 unsigned words; /* # of complete words in buffer */
104 unsigned bits; /* # of used bits in accum */
108 /* OPT: an MSVC built-in would be better */
109 static _inline FLAC__uint32 local_swap32_(FLAC__uint32 x)
111 x = ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
112 return (x>>16) | (x<<16);
116 /* * WATCHOUT: The current implementation only grows the buffer. */
117 static FLAC__bool bitwriter_grow_(FLAC__BitWriter *bw, unsigned bits_to_add)
119 unsigned new_capacity;
122 FLAC__ASSERT(0 != bw);
123 FLAC__ASSERT(0 != bw->buffer);
125 /* calculate total words needed to store 'bits_to_add' additional bits */
126 new_capacity = bw->words + ((bw->bits + bits_to_add + FLAC__BITS_PER_WORD - 1) / FLAC__BITS_PER_WORD);
128 /* it's possible (due to pessimism in the growth estimation that
129 * leads to this call) that we don't actually need to grow
131 if(bw->capacity >= new_capacity)
134 /* round up capacity increase to the nearest FLAC__BITWRITER_DEFAULT_INCREMENT */
135 if((new_capacity - bw->capacity) % FLAC__BITWRITER_DEFAULT_INCREMENT)
136 new_capacity += FLAC__BITWRITER_DEFAULT_INCREMENT - ((new_capacity - bw->capacity) % FLAC__BITWRITER_DEFAULT_INCREMENT);
137 /* make sure we got everything right */
138 FLAC__ASSERT(0 == (new_capacity - bw->capacity) % FLAC__BITWRITER_DEFAULT_INCREMENT);
139 FLAC__ASSERT(new_capacity > bw->capacity);
140 FLAC__ASSERT(new_capacity >= bw->words + ((bw->bits + bits_to_add + FLAC__BITS_PER_WORD - 1) / FLAC__BITS_PER_WORD));
142 new_buffer = (bwword*)realloc(bw->buffer, sizeof(bwword)*new_capacity);
145 bw->buffer = new_buffer;
146 bw->capacity = new_capacity;
151 /***********************************************************************
153 * Class constructor/destructor
155 ***********************************************************************/
157 FLAC__BitWriter *FLAC__bitwriter_new(void)
159 FLAC__BitWriter *bw = (FLAC__BitWriter*)calloc(1, sizeof(FLAC__BitWriter));
160 /* note that calloc() sets all members to 0 for us */
164 void FLAC__bitwriter_delete(FLAC__BitWriter *bw)
166 FLAC__ASSERT(0 != bw);
168 FLAC__bitwriter_free(bw);
172 /***********************************************************************
174 * Public class methods
176 ***********************************************************************/
178 FLAC__bool FLAC__bitwriter_init(FLAC__BitWriter *bw)
180 FLAC__ASSERT(0 != bw);
182 bw->words = bw->bits = 0;
183 bw->capacity = FLAC__BITWRITER_DEFAULT_CAPACITY;
184 bw->buffer = (bwword*)malloc(sizeof(bwword) * bw->capacity);
191 void FLAC__bitwriter_free(FLAC__BitWriter *bw)
193 FLAC__ASSERT(0 != bw);
199 bw->words = bw->bits = 0;
202 void FLAC__bitwriter_clear(FLAC__BitWriter *bw)
204 bw->words = bw->bits = 0;
207 void FLAC__bitwriter_dump(const FLAC__BitWriter *bw, FILE *out)
211 fprintf(out, "bitwriter is NULL\n");
214 fprintf(out, "bitwriter: capacity=%u words=%u bits=%u total_bits=%u\n", bw->capacity, bw->words, bw->bits, FLAC__TOTAL_BITS(bw));
216 for(i = 0; i < bw->words; i++) {
217 fprintf(out, "%08X: ", i);
218 for(j = 0; j < FLAC__BITS_PER_WORD; j++)
219 fprintf(out, "%01u", bw->buffer[i] & (1 << (FLAC__BITS_PER_WORD-j-1)) ? 1:0);
223 fprintf(out, "%08X: ", i);
224 for(j = 0; j < bw->bits; j++)
225 fprintf(out, "%01u", bw->accum & (1 << (bw->bits-j-1)) ? 1:0);
231 FLAC__bool FLAC__bitwriter_get_write_crc16(FLAC__BitWriter *bw, FLAC__uint16 *crc)
233 const FLAC__byte *buffer;
236 FLAC__ASSERT((bw->bits & 7) == 0); /* assert that we're byte-aligned */
238 if(!FLAC__bitwriter_get_buffer(bw, &buffer, &bytes))
241 *crc = (FLAC__uint16)FLAC__crc16(buffer, bytes);
242 FLAC__bitwriter_release_buffer(bw);
246 FLAC__bool FLAC__bitwriter_get_write_crc8(FLAC__BitWriter *bw, FLAC__byte *crc)
248 const FLAC__byte *buffer;
251 FLAC__ASSERT((bw->bits & 7) == 0); /* assert that we're byte-aligned */
253 if(!FLAC__bitwriter_get_buffer(bw, &buffer, &bytes))
256 *crc = FLAC__crc8(buffer, bytes);
257 FLAC__bitwriter_release_buffer(bw);
261 FLAC__bool FLAC__bitwriter_is_byte_aligned(const FLAC__BitWriter *bw)
263 return ((bw->bits & 7) == 0);
266 unsigned FLAC__bitwriter_get_input_bits_unconsumed(const FLAC__BitWriter *bw)
268 return FLAC__TOTAL_BITS(bw);
271 FLAC__bool FLAC__bitwriter_get_buffer(FLAC__BitWriter *bw, const FLAC__byte **buffer, size_t *bytes)
273 FLAC__ASSERT((bw->bits & 7) == 0);
274 /* double protection */
277 /* if we have bits in the accumulator we have to flush those to the buffer first */
279 FLAC__ASSERT(bw->words <= bw->capacity);
280 if(bw->words == bw->capacity && !bitwriter_grow_(bw, FLAC__BITS_PER_WORD))
282 /* append bits as complete word to buffer, but don't change bw->accum or bw->bits */
283 bw->buffer[bw->words] = SWAP_BE_WORD_TO_HOST(bw->accum << (FLAC__BITS_PER_WORD-bw->bits));
285 /* now we can just return what we have */
286 *buffer = (FLAC__byte*)bw->buffer;
287 *bytes = (FLAC__BYTES_PER_WORD * bw->words) + (bw->bits >> 3);
291 void FLAC__bitwriter_release_buffer(FLAC__BitWriter *bw)
293 /* nothing to do. in the future, strict checking of a 'writer-is-in-
294 * get-mode' flag could be added everywhere and then cleared here
299 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_zeroes(FLAC__BitWriter *bw, unsigned bits)
303 FLAC__ASSERT(0 != bw);
304 FLAC__ASSERT(0 != bw->buffer);
308 /* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+bits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */
309 if(bw->capacity <= bw->words + bits && !bitwriter_grow_(bw, bits))
311 /* first part gets to word alignment */
313 n = min(FLAC__BITS_PER_WORD - bw->bits, bits);
317 if(bw->bits == FLAC__BITS_PER_WORD) {
318 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
325 while(bits >= FLAC__BITS_PER_WORD) {
326 bw->buffer[bw->words++] = 0;
327 bits -= FLAC__BITS_PER_WORD;
329 /* do any leftovers */
337 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint32(FLAC__BitWriter *bw, FLAC__uint32 val, unsigned bits)
339 register unsigned left;
341 /* WATCHOUT: code does not work with <32bit words; we can make things much faster with this assertion */
342 FLAC__ASSERT(FLAC__BITS_PER_WORD >= 32);
344 FLAC__ASSERT(0 != bw);
345 FLAC__ASSERT(0 != bw->buffer);
347 FLAC__ASSERT(bits <= 32);
351 /* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+bits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */
352 if(bw->capacity <= bw->words + bits && !bitwriter_grow_(bw, bits))
355 left = FLAC__BITS_PER_WORD - bw->bits;
361 else if(bw->bits) { /* WATCHOUT: if bw->bits == 0, left==FLAC__BITS_PER_WORD and bw->accum<<=left is a NOP instead of setting to 0 */
363 bw->accum |= val >> (bw->bits = bits - left);
364 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
370 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(val);
376 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_int32(FLAC__BitWriter *bw, FLAC__int32 val, unsigned bits)
378 /* zero-out unused bits */
380 val &= (~(0xffffffff << bits));
382 return FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, bits);
385 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint64(FLAC__BitWriter *bw, FLAC__uint64 val, unsigned bits)
387 /* this could be a little faster but it's not used for much */
390 FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)(val>>32), bits-32) &&
391 FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, 32);
394 return FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, bits);
397 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint32_little_endian(FLAC__BitWriter *bw, FLAC__uint32 val)
399 /* this doesn't need to be that fast as currently it is only used for vorbis comments */
401 if(!FLAC__bitwriter_write_raw_uint32(bw, val & 0xff, 8))
403 if(!FLAC__bitwriter_write_raw_uint32(bw, (val>>8) & 0xff, 8))
405 if(!FLAC__bitwriter_write_raw_uint32(bw, (val>>16) & 0xff, 8))
407 if(!FLAC__bitwriter_write_raw_uint32(bw, val>>24, 8))
413 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_byte_block(FLAC__BitWriter *bw, const FLAC__byte vals[], unsigned nvals)
417 /* this could be faster but currently we don't need it to be since it's only used for writing metadata */
418 for(i = 0; i < nvals; i++) {
419 if(!FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)(vals[i]), 8))
426 FLAC__bool FLAC__bitwriter_write_unary_unsigned(FLAC__BitWriter *bw, unsigned val)
429 return FLAC__bitwriter_write_raw_uint32(bw, 1, ++val);
432 FLAC__bitwriter_write_zeroes(bw, val) &&
433 FLAC__bitwriter_write_raw_uint32(bw, 1, 1);
436 unsigned FLAC__bitwriter_rice_bits(FLAC__int32 val, unsigned parameter)
440 FLAC__ASSERT(parameter < sizeof(unsigned)*8);
442 /* fold signed to unsigned; actual formula is: negative(v)? -2v-1 : 2v */
443 uval = (val<<1) ^ (val>>31);
445 return 1 + parameter + (uval >> parameter);
449 unsigned FLAC__bitwriter_golomb_bits_signed(int val, unsigned parameter)
451 unsigned bits, msbs, uval;
454 FLAC__ASSERT(parameter > 0);
456 /* fold signed to unsigned */
458 uval = (unsigned)(((-(++val)) << 1) + 1);
460 uval = (unsigned)(val << 1);
462 k = FLAC__bitmath_ilog2(parameter);
463 if(parameter == 1u<<k) {
464 FLAC__ASSERT(k <= 30);
472 d = (1 << (k+1)) - parameter;
473 q = uval / parameter;
474 r = uval - (q * parameter);
483 unsigned FLAC__bitwriter_golomb_bits_unsigned(unsigned uval, unsigned parameter)
488 FLAC__ASSERT(parameter > 0);
490 k = FLAC__bitmath_ilog2(parameter);
491 if(parameter == 1u<<k) {
492 FLAC__ASSERT(k <= 30);
500 d = (1 << (k+1)) - parameter;
501 q = uval / parameter;
502 r = uval - (q * parameter);
512 FLAC__bool FLAC__bitwriter_write_rice_signed(FLAC__BitWriter *bw, FLAC__int32 val, unsigned parameter)
514 unsigned total_bits, interesting_bits, msbs;
515 FLAC__uint32 uval, pattern;
517 FLAC__ASSERT(0 != bw);
518 FLAC__ASSERT(0 != bw->buffer);
519 FLAC__ASSERT(parameter < 8*sizeof(uval));
521 /* fold signed to unsigned; actual formula is: negative(v)? -2v-1 : 2v */
522 uval = (val<<1) ^ (val>>31);
524 msbs = uval >> parameter;
525 interesting_bits = 1 + parameter;
526 total_bits = interesting_bits + msbs;
527 pattern = 1 << parameter; /* the unary end bit */
528 pattern |= (uval & ((1<<parameter)-1)); /* the binary LSBs */
531 return FLAC__bitwriter_write_raw_uint32(bw, pattern, total_bits);
534 FLAC__bitwriter_write_zeroes(bw, msbs) && /* write the unary MSBs */
535 FLAC__bitwriter_write_raw_uint32(bw, pattern, interesting_bits); /* write the unary end bit and binary LSBs */
538 FLAC__bool FLAC__bitwriter_write_rice_signed_block(FLAC__BitWriter *bw, const FLAC__int32 *vals, unsigned nvals, unsigned parameter)
540 const FLAC__uint32 mask1 = FLAC__WORD_ALL_ONES << parameter; /* we val|=mask1 to set the stop bit above it... */
541 const FLAC__uint32 mask2 = FLAC__WORD_ALL_ONES >> (31-parameter); /* ...then mask off the bits above the stop bit with val&=mask2*/
543 register unsigned left;
544 const unsigned lsbits = 1 + parameter;
547 FLAC__ASSERT(0 != bw);
548 FLAC__ASSERT(0 != bw->buffer);
549 FLAC__ASSERT(parameter < 8*sizeof(bwword)-1);
550 /* WATCHOUT: code does not work with <32bit words; we can make things much faster with this assertion */
551 FLAC__ASSERT(FLAC__BITS_PER_WORD >= 32);
554 /* fold signed to unsigned; actual formula is: negative(v)? -2v-1 : 2v */
555 uval = (*vals<<1) ^ (*vals>>31);
557 msbits = uval >> parameter;
559 /* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+msbits+lsbits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */
560 /* OPT: pessimism may cause flurry of false calls to grow_ which eat up all savings before it */
561 if(bw->capacity <= bw->words + bw->bits + msbits + lsbits && !bitwriter_grow_(bw, msbits+lsbits))
565 /* first part gets to word alignment */
567 left = min(FLAC__BITS_PER_WORD - bw->bits, msbits);
571 if(bw->bits == FLAC__BITS_PER_WORD) {
572 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
579 while(msbits >= FLAC__BITS_PER_WORD) {
580 bw->buffer[bw->words++] = 0;
581 msbits -= FLAC__BITS_PER_WORD;
583 /* do any leftovers */
590 uval |= mask1; /* set stop bit */
591 uval &= mask2; /* mask off unused top bits */
593 left = FLAC__BITS_PER_WORD - bw->bits;
595 bw->accum <<= lsbits;
600 /* if bw->bits == 0, left==FLAC__BITS_PER_WORD which will always
601 * be > lsbits (because of previous assertions) so it would have
602 * triggered the (lsbits<left) case above.
604 FLAC__ASSERT(bw->bits);
605 FLAC__ASSERT(left < FLAC__BITS_PER_WORD);
607 bw->accum |= uval >> (bw->bits = lsbits - left);
608 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
618 FLAC__bool FLAC__bitwriter_write_golomb_signed(FLAC__BitWriter *bw, int val, unsigned parameter)
620 unsigned total_bits, msbs, uval;
623 FLAC__ASSERT(0 != bw);
624 FLAC__ASSERT(0 != bw->buffer);
625 FLAC__ASSERT(parameter > 0);
627 /* fold signed to unsigned */
629 uval = (unsigned)(((-(++val)) << 1) + 1);
631 uval = (unsigned)(val << 1);
633 k = FLAC__bitmath_ilog2(parameter);
634 if(parameter == 1u<<k) {
637 FLAC__ASSERT(k <= 30);
640 total_bits = 1 + k + msbs;
641 pattern = 1 << k; /* the unary end bit */
642 pattern |= (uval & ((1u<<k)-1)); /* the binary LSBs */
644 if(total_bits <= 32) {
645 if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, total_bits))
649 /* write the unary MSBs */
650 if(!FLAC__bitwriter_write_zeroes(bw, msbs))
652 /* write the unary end bit and binary LSBs */
653 if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, k+1))
660 d = (1 << (k+1)) - parameter;
661 q = uval / parameter;
662 r = uval - (q * parameter);
663 /* write the unary MSBs */
664 if(!FLAC__bitwriter_write_zeroes(bw, q))
666 /* write the unary end bit */
667 if(!FLAC__bitwriter_write_raw_uint32(bw, 1, 1))
669 /* write the binary LSBs */
671 if(!FLAC__bitwriter_write_raw_uint32(bw, r+d, k+1))
675 if(!FLAC__bitwriter_write_raw_uint32(bw, r, k))
682 FLAC__bool FLAC__bitwriter_write_golomb_unsigned(FLAC__BitWriter *bw, unsigned uval, unsigned parameter)
684 unsigned total_bits, msbs;
687 FLAC__ASSERT(0 != bw);
688 FLAC__ASSERT(0 != bw->buffer);
689 FLAC__ASSERT(parameter > 0);
691 k = FLAC__bitmath_ilog2(parameter);
692 if(parameter == 1u<<k) {
695 FLAC__ASSERT(k <= 30);
698 total_bits = 1 + k + msbs;
699 pattern = 1 << k; /* the unary end bit */
700 pattern |= (uval & ((1u<<k)-1)); /* the binary LSBs */
702 if(total_bits <= 32) {
703 if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, total_bits))
707 /* write the unary MSBs */
708 if(!FLAC__bitwriter_write_zeroes(bw, msbs))
710 /* write the unary end bit and binary LSBs */
711 if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, k+1))
718 d = (1 << (k+1)) - parameter;
719 q = uval / parameter;
720 r = uval - (q * parameter);
721 /* write the unary MSBs */
722 if(!FLAC__bitwriter_write_zeroes(bw, q))
724 /* write the unary end bit */
725 if(!FLAC__bitwriter_write_raw_uint32(bw, 1, 1))
727 /* write the binary LSBs */
729 if(!FLAC__bitwriter_write_raw_uint32(bw, r+d, k+1))
733 if(!FLAC__bitwriter_write_raw_uint32(bw, r, k))
741 FLAC__bool FLAC__bitwriter_write_utf8_uint32(FLAC__BitWriter *bw, FLAC__uint32 val)
745 FLAC__ASSERT(0 != bw);
746 FLAC__ASSERT(0 != bw->buffer);
748 FLAC__ASSERT(!(val & 0x80000000)); /* this version only handles 31 bits */
751 return FLAC__bitwriter_write_raw_uint32(bw, val, 8);
753 else if(val < 0x800) {
754 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xC0 | (val>>6), 8);
755 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (val&0x3F), 8);
757 else if(val < 0x10000) {
758 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xE0 | (val>>12), 8);
759 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>6)&0x3F), 8);
760 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (val&0x3F), 8);
762 else if(val < 0x200000) {
763 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xF0 | (val>>18), 8);
764 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>12)&0x3F), 8);
765 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>6)&0x3F), 8);
766 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (val&0x3F), 8);
768 else if(val < 0x4000000) {
769 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xF8 | (val>>24), 8);
770 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>18)&0x3F), 8);
771 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>12)&0x3F), 8);
772 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>6)&0x3F), 8);
773 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (val&0x3F), 8);
776 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xFC | (val>>30), 8);
777 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>24)&0x3F), 8);
778 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>18)&0x3F), 8);
779 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>12)&0x3F), 8);
780 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>6)&0x3F), 8);
781 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (val&0x3F), 8);
787 FLAC__bool FLAC__bitwriter_write_utf8_uint64(FLAC__BitWriter *bw, FLAC__uint64 val)
791 FLAC__ASSERT(0 != bw);
792 FLAC__ASSERT(0 != bw->buffer);
794 FLAC__ASSERT(!(val & FLAC__U64L(0xFFFFFFF000000000))); /* this version only handles 36 bits */
797 return FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, 8);
799 else if(val < 0x800) {
800 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xC0 | (FLAC__uint32)(val>>6), 8);
801 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
803 else if(val < 0x10000) {
804 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xE0 | (FLAC__uint32)(val>>12), 8);
805 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8);
806 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
808 else if(val < 0x200000) {
809 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xF0 | (FLAC__uint32)(val>>18), 8);
810 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8);
811 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8);
812 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
814 else if(val < 0x4000000) {
815 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xF8 | (FLAC__uint32)(val>>24), 8);
816 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>18)&0x3F), 8);
817 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8);
818 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8);
819 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
821 else if(val < 0x80000000) {
822 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xFC | (FLAC__uint32)(val>>30), 8);
823 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>24)&0x3F), 8);
824 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>18)&0x3F), 8);
825 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8);
826 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8);
827 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
830 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xFE, 8);
831 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>30)&0x3F), 8);
832 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>24)&0x3F), 8);
833 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>18)&0x3F), 8);
834 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8);
835 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8);
836 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
842 FLAC__bool FLAC__bitwriter_zero_pad_to_byte_boundary(FLAC__BitWriter *bw)
844 /* 0-pad to byte boundary */
846 return FLAC__bitwriter_write_zeroes(bw, 8 - (bw->bits & 7u));