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-rw-r--r--[-rwxr-xr-x]libFLAC/bitwriter.c142
1 files changed, 48 insertions, 94 deletions
diff --git a/libFLAC/bitwriter.c b/libFLAC/bitwriter.c
index e3e7ad1..76be1bc 100755..100644
--- a/libFLAC/bitwriter.c
+++ b/libFLAC/bitwriter.c
@@ -1,5 +1,6 @@
/* libFLAC - Free Lossless Audio Codec library
- * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007 Josh Coalson
+ * Copyright (C) 2000-2009 Josh Coalson
+ * Copyright (C) 2011-2014 Xiph.Org Foundation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -29,45 +30,31 @@
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
-#include <stdlib.h> /* for malloc() */
-#include <string.h> /* for memcpy(), memset() */
-#ifdef _MSC_VER
-#include <winsock.h> /* for ntohl() */
-#elif defined FLAC__SYS_DARWIN
-#include <machine/endian.h> /* for ntohl() */
-#elif defined __MINGW32__
-#include <winsock.h> /* for ntohl() */
-#else
-#include <netinet/in.h> /* for ntohl() */
-#endif
-#if 0 /* UNUSED */
-#include "private/bitmath.h"
-#endif
+#include <stdlib.h>
+#include <string.h>
#include "private/bitwriter.h"
#include "private/crc.h"
+#include "private/macros.h"
#include "FLAC/assert.h"
#include "share/alloc.h"
+#include "share/compat.h"
+#include "share/endswap.h"
/* Things should be fastest when this matches the machine word size */
/* WATCHOUT: if you 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 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 SWAP_BE_WORD_TO_HOST(x) (x)
#else
-#ifdef _MSC_VER
-#define SWAP_BE_WORD_TO_HOST(x) local_swap32_(x)
-#else
-#define SWAP_BE_WORD_TO_HOST(x) ntohl(x)
-#endif
+#define SWAP_BE_WORD_TO_HOST(x) ENDSWAP_32(x)
#endif
/*
@@ -76,51 +63,29 @@ typedef FLAC__uint32 bwword;
* a frame or metadata block, then write that out and clear the buffer for the
* next one.
*/
-static const unsigned FLAC__BITWRITER_DEFAULT_CAPACITY = 32768u / sizeof(bwword); /* size in words */
+static const unsigned FLAC__BITWRITER_DEFAULT_CAPACITY = 32768u / sizeof(uint32_t); /* size in words */
/* When growing, increment 4K at a time */
-static const unsigned FLAC__BITWRITER_DEFAULT_INCREMENT = 4096u / sizeof(bwword); /* size in words */
+static const unsigned FLAC__BITWRITER_DEFAULT_INCREMENT = 4096u / sizeof(uint32_t); /* size in words */
#define FLAC__WORDS_TO_BITS(words) ((words) * FLAC__BITS_PER_WORD)
#define FLAC__TOTAL_BITS(bw) (FLAC__WORDS_TO_BITS((bw)->words) + (bw)->bits)
-#ifdef min
-#undef min
-#endif
-#define min(x,y) ((x)<(y)?(x):(y))
-
-/* adjust for compilers that can't understand using LLU suffix for uint64_t literals */
-#ifdef _MSC_VER
-#define FLAC__U64L(x) x
-#else
-#define FLAC__U64L(x) x##LLU
-#endif
-
-#ifndef FLaC__INLINE
-#define FLaC__INLINE
-#endif
-
struct FLAC__BitWriter {
- bwword *buffer;
- bwword accum; /* accumulator; bits are right-justified; when full, accum is appended to buffer */
+ uint32_t *buffer;
+ uint32_t accum; /* accumulator; bits are right-justified; when full, accum is appended to buffer */
unsigned capacity; /* capacity of buffer in words */
unsigned words; /* # of complete words in buffer */
unsigned bits; /* # of used bits in accum */
};
-#ifdef _MSC_VER
-/* OPT: an MSVC built-in would be better */
-static _inline FLAC__uint32 local_swap32_(FLAC__uint32 x)
-{
- x = ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
- return (x>>16) | (x<<16);
-}
-#endif
-
/* * WATCHOUT: The current implementation only grows the buffer. */
-static FLAC__bool bitwriter_grow_(FLAC__BitWriter *bw, unsigned bits_to_add)
+#ifndef __SUNPRO_C
+static
+#endif
+FLAC__bool bitwriter_grow_(FLAC__BitWriter *bw, unsigned bits_to_add)
{
unsigned new_capacity;
- bwword *new_buffer;
+ uint32_t *new_buffer;
FLAC__ASSERT(0 != bw);
FLAC__ASSERT(0 != bw->buffer);
@@ -142,7 +107,7 @@ static FLAC__bool bitwriter_grow_(FLAC__BitWriter *bw, unsigned bits_to_add)
FLAC__ASSERT(new_capacity > bw->capacity);
FLAC__ASSERT(new_capacity >= bw->words + ((bw->bits + bits_to_add + FLAC__BITS_PER_WORD - 1) / FLAC__BITS_PER_WORD));
- new_buffer = (bwword*)safe_realloc_mul_2op_(bw->buffer, sizeof(bwword), /*times*/new_capacity);
+ new_buffer = safe_realloc_mul_2op_(bw->buffer, sizeof(uint32_t), /*times*/new_capacity);
if(new_buffer == 0)
return false;
bw->buffer = new_buffer;
@@ -159,7 +124,7 @@ static FLAC__bool bitwriter_grow_(FLAC__BitWriter *bw, unsigned bits_to_add)
FLAC__BitWriter *FLAC__bitwriter_new(void)
{
- FLAC__BitWriter *bw = (FLAC__BitWriter*)calloc(1, sizeof(FLAC__BitWriter));
+ FLAC__BitWriter *bw = calloc(1, sizeof(FLAC__BitWriter));
/* note that calloc() sets all members to 0 for us */
return bw;
}
@@ -184,7 +149,7 @@ FLAC__bool FLAC__bitwriter_init(FLAC__BitWriter *bw)
bw->words = bw->bits = 0;
bw->capacity = FLAC__BITWRITER_DEFAULT_CAPACITY;
- bw->buffer = (bwword*)malloc(sizeof(bwword) * bw->capacity);
+ bw->buffer = malloc(sizeof(uint32_t) * bw->capacity);
if(bw->buffer == 0)
return false;
@@ -299,7 +264,7 @@ void FLAC__bitwriter_release_buffer(FLAC__BitWriter *bw)
(void)bw;
}
-FLaC__INLINE FLAC__bool FLAC__bitwriter_write_zeroes(FLAC__BitWriter *bw, unsigned bits)
+inline FLAC__bool FLAC__bitwriter_write_zeroes(FLAC__BitWriter *bw, unsigned bits)
{
unsigned n;
@@ -313,7 +278,7 @@ FLaC__INLINE FLAC__bool FLAC__bitwriter_write_zeroes(FLAC__BitWriter *bw, unsign
return false;
/* first part gets to word alignment */
if(bw->bits) {
- n = min(FLAC__BITS_PER_WORD - bw->bits, bits);
+ n = flac_min(FLAC__BITS_PER_WORD - bw->bits, bits);
bw->accum <<= n;
bits -= n;
bw->bits += n;
@@ -337,7 +302,7 @@ FLaC__INLINE FLAC__bool FLAC__bitwriter_write_zeroes(FLAC__BitWriter *bw, unsign
return true;
}
-FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint32(FLAC__BitWriter *bw, FLAC__uint32 val, unsigned bits)
+inline FLAC__bool FLAC__bitwriter_write_raw_uint32(FLAC__BitWriter *bw, FLAC__uint32 val, unsigned bits)
{
register unsigned left;
@@ -376,7 +341,7 @@ FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint32(FLAC__BitWriter *bw, FL
return true;
}
-FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_int32(FLAC__BitWriter *bw, FLAC__int32 val, unsigned bits)
+inline FLAC__bool FLAC__bitwriter_write_raw_int32(FLAC__BitWriter *bw, FLAC__int32 val, unsigned bits)
{
/* zero-out unused bits */
if(bits < 32)
@@ -385,7 +350,7 @@ FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_int32(FLAC__BitWriter *bw, FLA
return FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, bits);
}
-FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint64(FLAC__BitWriter *bw, FLAC__uint64 val, unsigned bits)
+inline FLAC__bool FLAC__bitwriter_write_raw_uint64(FLAC__BitWriter *bw, FLAC__uint64 val, unsigned bits)
{
/* this could be a little faster but it's not used for much */
if(bits > 32) {
@@ -397,7 +362,7 @@ FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint64(FLAC__BitWriter *bw, FL
return FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, bits);
}
-FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint32_little_endian(FLAC__BitWriter *bw, FLAC__uint32 val)
+inline FLAC__bool FLAC__bitwriter_write_raw_uint32_little_endian(FLAC__BitWriter *bw, FLAC__uint32 val)
{
/* this doesn't need to be that fast as currently it is only used for vorbis comments */
@@ -413,7 +378,7 @@ FLaC__INLINE FLAC__bool FLAC__bitwriter_write_raw_uint32_little_endian(FLAC__Bit
return true;
}
-FLaC__INLINE FLAC__bool FLAC__bitwriter_write_byte_block(FLAC__BitWriter *bw, const FLAC__byte vals[], unsigned nvals)
+inline FLAC__bool FLAC__bitwriter_write_byte_block(FLAC__BitWriter *bw, const FLAC__byte vals[], unsigned nvals)
{
unsigned i;
@@ -549,7 +514,7 @@ FLAC__bool FLAC__bitwriter_write_rice_signed_block(FLAC__BitWriter *bw, const FL
FLAC__ASSERT(0 != bw);
FLAC__ASSERT(0 != bw->buffer);
- FLAC__ASSERT(parameter < 8*sizeof(bwword)-1);
+ FLAC__ASSERT(parameter < 8*sizeof(uint32_t)-1);
/* WATCHOUT: code does not work with <32bit words; we can make things much faster with this assertion */
FLAC__ASSERT(FLAC__BITS_PER_WORD >= 32);
@@ -559,30 +524,8 @@ FLAC__bool FLAC__bitwriter_write_rice_signed_block(FLAC__BitWriter *bw, const FL
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 bwword */
- /* ^^^ if bw->bits is 0 then we may have filled the buffer and have no free bwword 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 bwword */
- /* ^^^ if bw->bits is 0 then we may have filled the buffer and have no free bwword to work in */
+ 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 */
@@ -590,10 +533,9 @@ FLAC__bool FLAC__bitwriter_write_rice_signed_block(FLAC__BitWriter *bw, const FL
bw->accum |= uval;
}
else {
-#endif
/* 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 */
- if(bw->capacity <= bw->words + bw->bits + msbits + 1/*lsbits always fit in 1 bwword*/ && !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))
return false;
if(msbits) {
@@ -645,9 +587,7 @@ break1:
bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum);
bw->accum = uval;
}
-#if 1
}
-#endif
vals++;
nvals--;
}
@@ -887,3 +827,17 @@ FLAC__bool FLAC__bitwriter_zero_pad_to_byte_boundary(FLAC__BitWriter *bw)
else
return true;
}
+
+/* These functions are declared inline in this file but are also callable as
+ * externs from elsewhere.
+ * According to the C99 spec, section 6.7.4, simply providing a function
+ * prototype in a header file without 'inline' and making the function inline
+ * in this file should be sufficient.
+ * Unfortunately, the Microsoft VS compiler doesn't pick them up externally. To
+ * fix that we add extern declarations here.
+ */
+extern FLAC__bool FLAC__bitwriter_write_zeroes(FLAC__BitWriter *bw, unsigned bits);
+extern FLAC__bool FLAC__bitwriter_write_raw_int32(FLAC__BitWriter *bw, FLAC__int32 val, unsigned bits);
+extern FLAC__bool FLAC__bitwriter_write_raw_uint64(FLAC__BitWriter *bw, FLAC__uint64 val, unsigned bits);
+extern FLAC__bool FLAC__bitwriter_write_raw_uint32_little_endian(FLAC__BitWriter *bw, FLAC__uint32 val);
+extern FLAC__bool FLAC__bitwriter_write_byte_block(FLAC__BitWriter *bw, const FLAC__byte vals[], unsigned nvals);
generated by cgit v1.1 at 2024-04-28 05:37:57 +0000