Displaying 8 results from an estimated 8 matches for "flac__word_all_ones".
2008 Mar 14
2
bitreader optimizations
...for the fact we
- * don't have a whole word. note though if the client is feeding
- * us data a byte at a time (unlikely), br->consumed_bits may not
- * be zero.
- */
- if(br->bytes) {
- const unsigned end = br->bytes * 8;
- brword b = (br->buffer[cwords] & (FLAC__WORD_ALL_ONES << (FLAC__BITS_PER_WORD-end))) << cbits;
- if(b) {
- i = COUNT_ZERO_MSBS(b);
- uval += i;
- bits = parameter;
- i++;
- cbits += i;
- FLAC__ASSERT(cbits < FLAC__BITS_PER_WORD);
- goto break1;
- }
- else {
- uval += end - cbits;
- cbits += e...
2012 May 04
0
[PATCH] Optimize FLAC__bitreader_read_rice_signed
...- * don't have a whole word. note though if the client is feeding
- * us data a byte at a time (unlikely), br->consumed_bits may not
- * be zero.
- */
- if(br->bytes*8 > cbits) {
- const unsigned end = br->bytes * 8;
- uint32_t b = (br->buffer[cwords] & (FLAC__WORD_ALL_ONES << (FLAC__BITS_PER_WORD-end))) << cbits;
- if(b) {
- i = COUNT_ZERO_MSBS(b);
- uval += i;
- bits = parameter;
- i++;
- cbits += i;
- FLAC__ASSERT(cbits < FLAC__BITS_PER_WORD);
- goto break1;
- }
- else {
- uval += end - cbits;
- cbits = en...
2008 Mar 17
0
bitreader optimizations
...for the fact we
- * don't have a whole word. note though if the client is feeding
- * us data a byte at a time (unlikely), br->consumed_bits may not
- * be zero.
- */
- if(br->bytes) {
- const unsigned end = br->bytes * 8;
- brword b = (br->buffer[cwords] & (FLAC__WORD_ALL_ONES << (FLAC__BITS_PER_WORD-end))) << cbits;
- if(b) {
- i = COUNT_ZERO_MSBS(b);
- uval += i;
- bits = parameter;
- i++;
- cbits += i;
- FLAC__ASSERT(cbits < FLAC__BITS_PER_WORD);
- goto break1;
- }
- else {
- uval += end - cbits;
- cbits += e...
2012 Aug 28
3
[PATCH 1/3] Make FLAC__clz_soft_uint32 static.
---
src/libFLAC/include/private/bitmath.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/src/libFLAC/include/private/bitmath.h b/src/libFLAC/include/private/bitmath.h
index 61b0e03..d32b1a7 100644
--- a/src/libFLAC/include/private/bitmath.h
+++ b/src/libFLAC/include/private/bitmath.h
@@ -42,7 +42,7 @@
#endif
/* Will never be emitted for MSVC, GCC, Intel compilers */
2012 May 09
1
[PATCH 2/2] bitmath: Finish up optimizations
...S(b);
+ i = FLAC__clz_uint32(b);
*val += i;
i++;
br->consumed_bits += i;
@@ -709,7 +669,7 @@ FLAC__bool FLAC__bitreader_read_unary_unsigned(FLAC__BitReader *br, unsigned *va
const unsigned end = br->bytes * 8;
uint32_t b = (br->buffer[br->consumed_words] & (FLAC__WORD_ALL_ONES << (FLAC__BITS_PER_WORD-end))) << br->consumed_bits;
if(b) {
- i = COUNT_ZERO_MSBS(b);
+ i = FLAC__clz_uint32(b);
*val += i;
i++;
br->consumed_bits += i;
@@ -800,7 +760,7 @@ FLAC__bool FLAC__bitreader_read_rice_signed_block(FLAC__BitReader *br, int vals[...
2015 Dec 16
2
about word size in bitreader/bitwriter
...change this you must also change the following #defines down to SWAP_BE_WORD_TO_HOST below to match */
/* WATCHOUT: there are a few places where the code will not work unless uint32_t is >= 32 bits wide */
#define FLAC__BYTES_PER_WORD 4
#define FLAC__BITS_PER_WORD 32
#define FLAC__WORD_ALL_ONES ((FLAC__uint32)0xffffffff)
...
and the following code in bitreader.c:
#if FLAC__BYTES_PER_WORD == 4
switch(br->crc16_align) {
case 0: crc = FLAC__CRC16_UPDATE((unsigned)(word >> 24), crc);
case 8: crc = FLAC__CRC16_UPDATE((unsigned)((word &g...
2015 Dec 28
1
[PATCH 3] for bitwriter.c
...< sizeof(unsigned)*8)
were changed to
FLAC__ASSERT(parameter < 32)
I don't understand why sizeof is better here. Also, bitreader.c already uses
asserts like "FLAC__ASSERT(parameter <= 31)".
4) Fixed the calculation of mask1 and mask2. The current code is incorrect
if FLAC__WORD_ALL_ONES is not 32-bit, so better to replace it with the
proper 32-bit constant.
5) In FLAC__bitwriter_write_rice_signed_block() the new variable total_bits
was added (just as in FLAC__bitwriter_write_rice_signed()). The code was
simplified. Example:
- bw->bits = bw->bits + msbits + lsbits;
+ bw...
2012 Apr 05
1
[PATCH] remove unnecesary typedef in bitwriter.c
...here are a few places where the code will not work unless bwword is >= 32 bits wide */
-typedef FLAC__uint32 bwword;
+/* WATCHOUT: there are a few places where the code will not work unless uint32_t is >= 32 bits wide */
#define FLAC__BYTES_PER_WORD 4
#define FLAC__BITS_PER_WORD 32
#define FLAC__WORD_ALL_ONES ((FLAC__uint32)0xffffffff)
-/* SWAP_BE_WORD_TO_HOST swaps bytes in a bwword (which is always big-endian) if necessary to match host byte order */
+/* SWAP_BE_WORD_TO_HOST swaps bytes in a uint32_t (which is always big-endian) if necessary to match host byte order */
#if WORDS_BIGENDIAN
#define SW...