Lines Matching refs:bw
84 #define FLAC__TOTAL_BITS(bw) (FLAC__WORDS_TO_BITS((bw)->words) + (bw)->bits)
120 static FLAC__bool bitwriter_grow_(FLAC__BitWriter *bw, unsigned bits_to_add)
125 FLAC__ASSERT(0 != bw);
126 FLAC__ASSERT(0 != bw->buffer);
129 new_capacity = bw->words + ((bw->bits + bits_to_add + FLAC__BITS_PER_WORD - 1) / FLAC__BITS_PER_WORD);
134 if(bw->capacity >= new_capacity)
138 if((new_capacity - bw->capacity) % FLAC__BITWRITER_DEFAULT_INCREMENT)
139 new_capacity += FLAC__BITWRITER_DEFAULT_INCREMENT - ((new_capacity - bw->capacity) % FLAC__BITWRITER_DEFAULT_INCREMENT);
141 FLAC__ASSERT(0 == (new_capacity - bw->capacity) % FLAC__BITWRITER_DEFAULT_INCREMENT);
142 FLAC__ASSERT(new_capacity > bw->capacity);
143 FLAC__ASSERT(new_capacity >= bw->words + ((bw->bits + bits_to_add + FLAC__BITS_PER_WORD - 1) / FLAC__BITS_PER_WORD));
145 new_buffer = (bwword*)safe_realloc_mul_2op_(bw->buffer, sizeof(bwword), /*times*/new_capacity);
148 bw->buffer = new_buffer;
149 bw->capacity = new_capacity;
162 FLAC__BitWriter *bw = (FLAC__BitWriter*)calloc(1, sizeof(FLAC__BitWriter));
164 return bw;
167 void FLAC__bitwriter_delete(FLAC__BitWriter *bw)
169 FLAC__ASSERT(0 != bw);
171 FLAC__bitwriter_free(bw);
172 free(bw);
181 FLAC__bool FLAC__bitwriter_init(FLAC__BitWriter *bw)
183 FLAC__ASSERT(0 != bw);
185 bw->words = bw->bits = 0;
186 bw->capacity = FLAC__BITWRITER_DEFAULT_CAPACITY;
187 bw->buffer = (bwword*)malloc(sizeof(bwword) * bw->capacity);
188 if(bw->buffer == 0)
194 void FLAC__bitwriter_free(FLAC__BitWriter *bw)
196 FLAC__ASSERT(0 != bw);
198 if(0 != bw->buffer)
199 free(bw->buffer);
200 bw->buffer = 0;
201 bw->capacity = 0;
202 bw->words = bw->bits = 0;
205 void FLAC__bitwriter_clear(FLAC__BitWriter *bw)
207 bw->words = bw->bits = 0;
210 void FLAC__bitwriter_dump(const FLAC__BitWriter *bw, FILE *out)
213 if(bw == 0) {
217 fprintf(out, "bitwriter: capacity=%u words=%u bits=%u total_bits=%u\n", bw->capacity, bw->words, bw->bits, FLAC__TOTAL_BITS(bw));
219 for(i = 0; i < bw->words; i++) {
222 fprintf(out, "%01u", bw->buffer[i] & (1 << (FLAC__BITS_PER_WORD-j-1)) ? 1:0);
225 if(bw->bits > 0) {
227 for(j = 0; j < bw->bits; j++)
228 fprintf(out, "%01u", bw->accum & (1 << (bw->bits-j-1)) ? 1:0);
234 FLAC__bool FLAC__bitwriter_get_write_crc16(FLAC__BitWriter *bw, FLAC__uint16 *crc)
239 FLAC__ASSERT((bw->bits & 7) == 0); /* assert that we're byte-aligned */
241 if(!FLAC__bitwriter_get_buffer(bw, &buffer, &bytes))
245 FLAC__bitwriter_release_buffer(bw);
249 FLAC__bool FLAC__bitwriter_get_write_crc8(FLAC__BitWriter *bw, FLAC__byte *crc)
254 FLAC__ASSERT((bw->bits & 7) == 0); /* assert that we're byte-aligned */
256 if(!FLAC__bitwriter_get_buffer(bw, &buffer, &bytes))
260 FLAC__bitwriter_release_buffer(bw);
264 FLAC__bool FLAC__bitwriter_is_byte_aligned(const FLAC__BitWriter *bw)
266 return ((bw->bits & 7) == 0);
269 unsigned FLAC__bitwriter_get_input_bits_unconsumed(const FLAC__BitWriter *bw)
271 return FLAC__TOTAL_BITS(bw);
274 FLAC__bool FLAC__bitwriter_get_buffer(FLAC__BitWriter *bw, const FLAC__byte **buffer, size_t *bytes)
276 FLAC__ASSERT((bw->bits & 7) == 0);
278 if(bw->bits & 7)
281 if(bw->bits) {
282 FLAC__ASSERT(bw->words <= bw->capacity);
283 if(bw->words == bw->capacity && !bitwriter_grow_(bw, FLAC__BITS_PER_WORD))
285 /* append bits as complete word to buffer, but don't change bw->accum or bw->bits */
286 bw->buffer[bw->words] = SWAP_BE_WORD_TO_HOST(bw->accum << (FLAC__BITS_PER_WORD-bw->bits));
289 *buffer = (FLAC__byte*)bw->buffer;
290 *bytes = (FLAC__BYTES_PER_WORD * bw->words) + (bw->bits >> 3);
294 void FLAC__bitwriter_release_buffer(FLAC__BitWriter *bw)
299 (void)bw;
302 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_zeroes(FLAC__BitWriter *bw, unsigned bits)
306 FLAC__ASSERT(0 != bw);
307 FLAC__ASSERT(0 != bw->buffer);
311 /* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+bits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */
312 if(bw->capacity <= bw->words + bits && !bitwriter_grow_(bw, bits))
315 if(bw->bits) {
316 n = min(FLAC__BITS_PER_WORD - bw->bits, bits);
317 bw->accum <<= n;
319 bw->bits += n;
320 if(bw->bits == FLAC__BITS_PER_WORD) {
321 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
322 bw->bits = 0;
329 bw->buffer[bw->words++] = 0;
334 bw->accum = 0;
335 bw->bits = bits;
340 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint32(FLAC__BitWriter *bw, FLAC__uint32 val, unsigned bits)
347 FLAC__ASSERT(0 != bw);
348 FLAC__ASSERT(0 != bw->buffer);
354 /* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+bits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */
355 if(bw->capacity <= bw->words + bits && !bitwriter_grow_(bw, bits))
358 left = FLAC__BITS_PER_WORD - bw->bits;
360 bw->accum <<= bits;
361 bw->accum |= val;
362 bw->bits += bits;
364 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 */
365 bw->accum <<= left;
366 bw->accum |= val >> (bw->bits = bits - left);
367 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
368 bw->accum = val;
371 bw->accum = val;
372 bw->bits = 0;
373 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(val);
379 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_int32(FLAC__BitWriter *bw, FLAC__int32 val, unsigned bits)
385 return FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, bits);
388 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint64(FLAC__BitWriter *bw, FLAC__uint64 val, unsigned bits)
393 FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)(val>>32), bits-32) &&
394 FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, 32);
397 return FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, bits);
400 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint32_little_endian(FLAC__BitWriter *bw, FLAC__uint32 val)
404 if(!FLAC__bitwriter_write_raw_uint32(bw, val & 0xff, 8))
406 if(!FLAC__bitwriter_write_raw_uint32(bw, (val>>8) & 0xff, 8))
408 if(!FLAC__bitwriter_write_raw_uint32(bw, (val>>16) & 0xff, 8))
410 if(!FLAC__bitwriter_write_raw_uint32(bw, val>>24, 8))
416 FLaC__INLINE FLAC__bool FLAC__bitwriter_write_byte_block(FLAC__BitWriter *bw, const FLAC__byte vals[], unsigned nvals)
422 if(!FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)(vals[i]), 8))
429 FLAC__bool FLAC__bitwriter_write_unary_unsigned(FLAC__BitWriter *bw, unsigned val)
432 return FLAC__bitwriter_write_raw_uint32(bw, 1, ++val);
435 FLAC__bitwriter_write_zeroes(bw, val) &&
436 FLAC__bitwriter_write_raw_uint32(bw, 1, 1);
515 FLAC__bool FLAC__bitwriter_write_rice_signed(FLAC__BitWriter *bw, FLAC__int32 val, unsigned parameter)
520 FLAC__ASSERT(0 != bw);
521 FLAC__ASSERT(0 != bw->buffer);
534 return FLAC__bitwriter_write_raw_uint32(bw, pattern, total_bits);
537 FLAC__bitwriter_write_zeroes(bw, msbs) && /* write the unary MSBs */
538 FLAC__bitwriter_write_raw_uint32(bw, pattern, interesting_bits); /* write the unary end bit and binary LSBs */
541 FLAC__bool FLAC__bitwriter_write_rice_signed_block(FLAC__BitWriter *bw, const FLAC__int32 *vals, unsigned nvals, unsigned parameter)
550 FLAC__ASSERT(0 != bw);
551 FLAC__ASSERT(0 != bw->buffer);
563 if(bw->bits && bw->bits + msbits + lsbits <= FLAC__BITS_PER_WORD) { /* i.e. if the whole thing fits in the current bwword */
564 /* ^^^ if bw->bits is 0 then we may have filled the buffer and have no free bwword to work in */
565 bw->bits = bw->bits + msbits + lsbits;
568 /* NOT: bw->accum <<= msbits + lsbits because msbits+lsbits could be 32, then the shift would be a NOP */
569 bw->accum <<= msbits;
570 bw->accum <<= lsbits;
571 bw->accum |= uval;
572 if(bw->bits == FLAC__BITS_PER_WORD) {
573 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
574 bw->bits = 0;
576 if(bw->capacity <= bw->words && nvals > 1 && !bitwriter_grow_(bw, 1)) {
577 FLAC__ASSERT(bw->capacity == bw->words);
584 if(bw->bits && bw->bits + msbits + lsbits < FLAC__BITS_PER_WORD) { /* i.e. if the whole thing fits in the current bwword */
585 /* ^^^ if bw->bits is 0 then we may have filled the buffer and have no free bwword to work in */
586 bw->bits = bw->bits + msbits + lsbits;
589 bw->accum <<= msbits + lsbits;
590 bw->accum |= uval;
594 /* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+msbits+lsbits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */
596 if(bw->capacity <= bw->words + bw->bits + msbits + 1/*lsbits always fit in 1 bwword*/ && !bitwriter_grow_(bw, msbits+lsbits))
601 if(bw->bits) {
602 left = FLAC__BITS_PER_WORD - bw->bits;
604 bw->accum <<= msbits;
605 bw->bits += msbits;
609 bw->accum <<= left;
611 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
612 bw->bits = 0;
617 bw->buffer[bw->words++] = 0;
622 bw->accum = 0;
623 bw->bits = msbits;
630 left = FLAC__BITS_PER_WORD - bw->bits;
632 bw->accum <<= lsbits;
633 bw->accum |= uval;
634 bw->bits += lsbits;
637 /* if bw->bits == 0, left==FLAC__BITS_PER_WORD which will always
641 FLAC__ASSERT(bw->bits);
643 bw->accum <<= left;
644 bw->accum |= uval >> (bw->bits = lsbits - left);
645 bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
646 bw->accum = uval;
658 FLAC__bool FLAC__bitwriter_write_golomb_signed(FLAC__BitWriter *bw, int val, unsigned parameter)
663 FLAC__ASSERT(0 != bw);
664 FLAC__ASSERT(0 != bw->buffer);
685 if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, total_bits))
690 if(!FLAC__bitwriter_write_zeroes(bw, msbs))
693 if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, k+1))
704 if(!FLAC__bitwriter_write_zeroes(bw, q))
707 if(!FLAC__bitwriter_write_raw_uint32(bw, 1, 1))
711 if(!FLAC__bitwriter_write_raw_uint32(bw, r+d, k+1))
715 if(!FLAC__bitwriter_write_raw_uint32(bw, r, k))
722 FLAC__bool FLAC__bitwriter_write_golomb_unsigned(FLAC__BitWriter *bw, unsigned uval, unsigned parameter)
727 FLAC__ASSERT(0 != bw);
728 FLAC__ASSERT(0 != bw->buffer);
743 if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, total_bits))
748 if(!FLAC__bitwriter_write_zeroes(bw, msbs))
751 if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, k+1))
762 if(!FLAC__bitwriter_write_zeroes(bw, q))
765 if(!FLAC__bitwriter_write_raw_uint32(bw, 1, 1))
769 if(!FLAC__bitwriter_write_raw_uint32(bw, r+d, k+1))
773 if(!FLAC__bitwriter_write_raw_uint32(bw, r, k))
781 FLAC__bool FLAC__bitwriter_write_utf8_uint32(FLAC__BitWriter *bw, FLAC__uint32 val)
785 FLAC__ASSERT(0 != bw);
786 FLAC__ASSERT(0 != bw->buffer);
791 return FLAC__bitwriter_write_raw_uint32(bw, val, 8);
794 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xC0 | (val>>6), 8);
795 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (val&0x3F), 8);
798 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xE0 | (val>>12), 8);
799 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>6)&0x3F), 8);
800 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (val&0x3F), 8);
803 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xF0 | (val>>18), 8);
804 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>12)&0x3F), 8);
805 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>6)&0x3F), 8);
806 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (val&0x3F), 8);
809 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xF8 | (val>>24), 8);
810 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>18)&0x3F), 8);
811 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>12)&0x3F), 8);
812 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>6)&0x3F), 8);
813 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (val&0x3F), 8);
816 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xFC | (val>>30), 8);
817 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>24)&0x3F), 8);
818 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>18)&0x3F), 8);
819 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>12)&0x3F), 8);
820 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | ((val>>6)&0x3F), 8);
821 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (val&0x3F), 8);
827 FLAC__bool FLAC__bitwriter_write_utf8_uint64(FLAC__BitWriter *bw, FLAC__uint64 val)
831 FLAC__ASSERT(0 != bw);
832 FLAC__ASSERT(0 != bw->buffer);
837 return FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, 8);
840 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xC0 | (FLAC__uint32)(val>>6), 8);
841 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
844 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xE0 | (FLAC__uint32)(val>>12), 8);
845 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8);
846 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
849 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xF0 | (FLAC__uint32)(val>>18), 8);
850 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8);
851 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8);
852 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
855 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xF8 | (FLAC__uint32)(val>>24), 8);
856 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>18)&0x3F), 8);
857 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8);
858 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8);
859 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
862 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xFC | (FLAC__uint32)(val>>30), 8);
863 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>24)&0x3F), 8);
864 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>18)&0x3F), 8);
865 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8);
866 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8);
867 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
870 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0xFE, 8);
871 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>30)&0x3F), 8);
872 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>24)&0x3F), 8);
873 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>18)&0x3F), 8);
874 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8);
875 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8);
876 ok &= FLAC__bitwriter_write_raw_uint32(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8);
882 FLAC__bool FLAC__bitwriter_zero_pad_to_byte_boundary(FLAC__BitWriter *bw)
885 if(bw->bits & 7u)
886 return FLAC__bitwriter_write_zeroes(bw, 8 - (bw->bits & 7u));