claunia/flac
1
0
Fork 0
mirror of https://github.com/claunia/flac.git synced 2025-12-16 18:54:26 +00:00
Code Issues Packages Projects Releases Wiki Activity

src/libFLAC/bitwriter.c : Remove dead code.

Browse Source
This commit is contained in:
Erik de Castro Lopo
2013-07-17 20:18:46 +10:00
parent 6f7ec60c7e
commit 33c23b3dfa
1 changed files with 0 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/libFLAC/bitwriter.c
View File

@@ -524,28 +524,6 @@ FLAC__bool FLAC__bitwriter_write_rice_signed_block(FLAC__BitWriter *bw, const FL
msbits = uval >> parameter; msbits = uval >> parameter;
#if 0 /* OPT: can remove this special case if it doesn't make up for the extra compare (doesn't make a statistically significant difference with msvc or gcc/x86) */
if(bw->bits && bw->bits + msbits + lsbits <= FLAC__BITS_PER_WORD) { /* i.e. if the whole thing fits in the current uint32_t */
/* ^^^ if bw->bits is 0 then we may have filled the buffer and have no free uint32_t to work in */
bw->bits = bw->bits + msbits + lsbits;
uval |= mask1; /* set stop bit */
uval &= mask2; /* mask off unused top bits */
/* NOT: bw->accum <<= msbits + lsbits because msbits+lsbits could be 32, then the shift would be a NOP */
bw->accum <<= msbits;
bw->accum <<= lsbits;
bw->accum |= uval;
if(bw->bits == FLAC__BITS_PER_WORD) {
bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
bw->bits = 0;
/* burying the capacity check down here means we have to grow the buffer a little if there are more vals to do */
if(bw->capacity <= bw->words && nvals > 1 && !bitwriter_grow_(bw, 1)) {
FLAC__ASSERT(bw->capacity == bw->words);
return false;
}
}
}
else {
#elif 1 /*@@@@@@ OPT: try this version with MSVC6 to see if better, not much difference for gcc-4 */
if(bw->bits && bw->bits + msbits + lsbits < FLAC__BITS_PER_WORD) { /* i.e. if the whole thing fits in the current uint32_t */ if(bw->bits && bw->bits + msbits + lsbits < FLAC__BITS_PER_WORD) { /* i.e. if the whole thing fits in the current uint32_t */
/* ^^^ if bw->bits is 0 then we may have filled the buffer and have no free uint32_t to work in */ /* ^^^ if bw->bits is 0 then we may have filled the buffer and have no free uint32_t to work in */
bw->bits = bw->bits + msbits + lsbits; bw->bits = bw->bits + msbits + lsbits;
@@ -555,7 +533,6 @@ FLAC__bool FLAC__bitwriter_write_rice_signed_block(FLAC__BitWriter *bw, const FL
bw->accum |= uval; bw->accum |= uval;
} }
else { else {
#endif
/* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+msbits+lsbits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */ /* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+msbits+lsbits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */
/* OPT: pessimism may cause flurry of false calls to grow_ which eat up all savings before it */ /* OPT: pessimism may cause flurry of false calls to grow_ which eat up all savings before it */
if(bw->capacity <= bw->words + bw->bits + msbits + 1/*lsbits always fit in 1 uint32_t*/ && !bitwriter_grow_(bw, msbits+lsbits)) if(bw->capacity <= bw->words + bw->bits + msbits + 1/*lsbits always fit in 1 uint32_t*/ && !bitwriter_grow_(bw, msbits+lsbits))
@@ -610,9 +587,7 @@ break1:
bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum); bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
bw->accum = uval; bw->accum = uval;
} }
#if 1
} }
#endif
vals++; vals++;
nvals--; nvals--;
} }