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patch from Eric Wong, slight improvement on Miroslav's work

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This commit is contained in:
Josh Coalson
2005-01-25 02:37:08 +00:00
parent 5750b36e3c
commit 5b60d02640
1 changed files with 11 additions and 7 deletions
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18
src/libFLAC/bitbuffer.c
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@@ -2118,7 +2118,7 @@ FLAC__bool FLAC__bitbuffer_read_rice_signed_block(FLAC__BitBuffer *bb, int vals[
{
const FLAC__blurb *buffer = bb->buffer;
unsigned i, j, val_i = 0;
unsigned i, j, val_i = nvals;
unsigned cbits = 0, uval = 0, msbs = 0, lsbs_left = 0;
FLAC__blurb blurb, save_blurb;
unsigned state = 0; /* 0 = getting unary MSBs, 1 = getting binary LSBs */
@@ -2132,7 +2132,7 @@ FLAC__bool FLAC__bitbuffer_read_rice_signed_block(FLAC__BitBuffer *bb, int vals[
cbits = bb->consumed_bits;
i = bb->consumed_blurbs;
while(val_i < nvals) {
while(val_i != 0) {
for( ; i < bb->blurbs; i++) {
blurb = (save_blurb = buffer[i]) << cbits;
while(1) {
@@ -2171,11 +2171,13 @@ FLAC__bool FLAC__bitbuffer_read_rice_signed_block(FLAC__BitBuffer *bb, int vals[
if(lsbs_left == available_bits) {
/* compose the value */
uval |= (msbs << parameter);
vals[val_i++] = (int)(uval >> 1 ^ -(int)(uval & 1));
if(val_i == nvals) {
*vals = (int)(uval >> 1 ^ -(int)(uval & 1));
--val_i;
if(val_i == 0) {
i++;
goto break2;
}
*(++vals);
msbs = 0;
state = 0;
@@ -2192,9 +2194,11 @@ FLAC__bool FLAC__bitbuffer_read_rice_signed_block(FLAC__BitBuffer *bb, int vals[
/* compose the value */
uval |= (msbs << parameter);
vals[val_i++] = (int)(uval >> 1 ^ -(int)(uval & 1));
if(val_i == nvals)
*vals = (int)(uval >> 1 ^ -(int)(uval & 1));
--val_i;
if(val_i == 0)
goto break2;
*(++vals);
msbs = 0;
state = 0;
@@ -2206,7 +2210,7 @@ break2:
bb->consumed_blurbs = i;
bb->consumed_bits = cbits;
bb->total_consumed_bits = (i << FLAC__BITS_PER_BLURB_LOG2) | cbits;
if(val_i < nvals) {
if(val_i != 0) {
if(!bitbuffer_read_from_client_(bb, read_callback, client_data))
return false;
/* these must be zero because we can only get here if we got to the end of the buffer */