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get_bits/put_bits: K&R formatting cosmetics

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Signed-off-by: Diego Biurrun <diego@biurrun.de>
pull/11/head
Diego Biurrun 12 years ago
parent 570a4a0189
commit 4af5310d29
2 changed files with 192 additions and 177 deletions
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  1. 126
      libavcodec/get_bits.h
  2. 7
      libavcodec/put_bits.h

126
libavcodec/get_bits.h
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@ -27,6 +27,7 @@
#define AVCODEC_GET_BITS_H
#include <stdint.h>
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
@ -73,45 +74,47 @@ typedef struct RL_VLC_ELEM {
} RL_VLC_ELEM;
/* Bitstream reader API docs:
name
arbitrary name which is used as prefix for the internal variables
gb
getbitcontext
OPEN_READER(name, gb)
load gb into local variables
CLOSE_READER(name, gb)
store local vars in gb
UPDATE_CACHE(name, gb)
refill the internal cache from the bitstream
after this call at least MIN_CACHE_BITS will be available,
GET_CACHE(name, gb)
will output the contents of the internal cache, next bit is MSB of 32 or 64 bit (FIXME 64bit)
SHOW_UBITS(name, gb, num)
will return the next num bits
SHOW_SBITS(name, gb, num)
will return the next num bits and do sign extension
SKIP_BITS(name, gb, num)
will skip over the next num bits
note, this is equivalent to SKIP_CACHE; SKIP_COUNTER
SKIP_CACHE(name, gb, num)
will remove the next num bits from the cache (note SKIP_COUNTER MUST be called before UPDATE_CACHE / CLOSE_READER)
SKIP_COUNTER(name, gb, num)
will increment the internal bit counter (see SKIP_CACHE & SKIP_BITS)
LAST_SKIP_BITS(name, gb, num)
like SKIP_BITS, to be used if next call is UPDATE_CACHE or CLOSE_READER
for examples see get_bits, show_bits, skip_bits, get_vlc
* name
* arbitrary name which is used as prefix for the internal variables
*
* gb
* getbitcontext
*
* OPEN_READER(name, gb)
* load gb into local variables
*
* CLOSE_READER(name, gb)
* store local vars in gb
*
* UPDATE_CACHE(name, gb)
* Refill the internal cache from the bitstream.
* After this call at least MIN_CACHE_BITS will be available.
*
* GET_CACHE(name, gb)
* Will output the contents of the internal cache,
* next bit is MSB of 32 or 64 bit (FIXME 64bit).
*
* SHOW_UBITS(name, gb, num)
* Will return the next num bits.
*
* SHOW_SBITS(name, gb, num)
* Will return the next num bits and do sign extension.
*
* SKIP_BITS(name, gb, num)
* Will skip over the next num bits.
* Note, this is equivalent to SKIP_CACHE; SKIP_COUNTER.
*
* SKIP_CACHE(name, gb, num)
* Will remove the next num bits from the cache (note SKIP_COUNTER
* MUST be called before UPDATE_CACHE / CLOSE_READER).
*
* SKIP_COUNTER(name, gb, num)
* Will increment the internal bit counter (see SKIP_CACHE & SKIP_BITS).
*
* LAST_SKIP_BITS(name, gb, num)
* Like SKIP_BITS, to be used if next call is UPDATE_CACHE or CLOSE_READER.
*
* For examples see get_bits, show_bits, skip_bits, get_vlc.
*/
#ifdef LONG_BITSTREAM_READER
@ -130,11 +133,9 @@ for examples see get_bits, show_bits, skip_bits, get_vlc
#define OPEN_READER(name, gb) \
unsigned int name ## _index = (gb)->index; \
unsigned int av_unused name ## _cache = 0; \
unsigned int av_unused name##_size_plus8 = \
(gb)->size_in_bits_plus8
unsigned int av_unused name ## _size_plus8 = (gb)->size_in_bits_plus8
#define HAVE_BITS_REMAINING(name, gb) \
name##_index < name##_size_plus8
#define HAVE_BITS_REMAINING(name, gb) name ## _index < name ## _size_plus8
#endif
#define CLOSE_READER(name, gb) (gb)->index = name ## _index
@ -172,7 +173,8 @@ for examples see get_bits, show_bits, skip_bits, get_vlc
name ## _index = FFMIN(name ## _size_plus8, name ## _index + (num))
#endif
#define SKIP_BITS(name, gb, num) do { \
#define SKIP_BITS(name, gb, num) \
do { \
SKIP_CACHE(name, gb, num); \
SKIP_COUNTER(name, gb, num); \
} while (0)
@ -194,7 +196,8 @@ static inline int get_bits_count(const GetBitContext *s)
return s->index;
}
static inline void skip_bits_long(GetBitContext *s, int n){
static inline void skip_bits_long(GetBitContext *s, int n)
{
#if UNCHECKED_BITSTREAM_READER
s->index += n;
#else
@ -300,9 +303,9 @@ static inline void skip_bits1(GetBitContext *s)
*/
static inline unsigned int get_bits_long(GetBitContext *s, int n)
{
if (n <= MIN_CACHE_BITS)
if (n <= MIN_CACHE_BITS) {
return get_bits(s, n);
else {
} else {
#ifdef BITSTREAM_READER_LE
int ret = get_bits(s, 16);
return ret | (get_bits(s, n - 16) << 16);
@ -344,9 +347,9 @@ static inline int get_sbits_long(GetBitContext *s, int n)
*/
static inline unsigned int show_bits_long(GetBitContext *s, int n)
{
if (n <= MIN_CACHE_BITS)
if (n <= MIN_CACHE_BITS) {
return show_bits(s, n);
else {
} else {
GetBitContext gb = *s;
return get_bits_long(&gb, n);
}
@ -390,6 +393,7 @@ static inline int init_get_bits(GetBitContext *s, const uint8_t *buffer,
#endif
s->buffer_end = buffer + buffer_size;
s->index = 0;
return ret;
}
@ -412,7 +416,8 @@ static inline int init_get_bits8(GetBitContext *s, const uint8_t *buffer,
static inline void align_get_bits(GetBitContext *s)
{
int n = -get_bits_count(s) & 7;
if (n) skip_bits(s, n);
if (n)
skip_bits(s, n);
}
#define init_vlc(vlc, nb_bits, nb_codes, \
@ -429,18 +434,19 @@ int ff_init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
const void *codes, int codes_wrap, int codes_size,
const void *symbols, int symbols_wrap, int symbols_size,
int flags);
void ff_free_vlc(VLC *vlc);
#define INIT_VLC_LE 2
#define INIT_VLC_USE_NEW_STATIC 4
void ff_free_vlc(VLC *vlc);
#define INIT_VLC_STATIC(vlc, bits, a,b,c,d,e,f,g, static_size) do { \
#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size) \
do { \
static VLC_TYPE table[static_size][2]; \
(vlc)->table = table; \
(vlc)->table_allocated = static_size; \
init_vlc(vlc, bits, a, b, c, d, e, f, g, INIT_VLC_USE_NEW_STATIC); \
} while (0)
/**
* If the vlc code is invalid and max_depth=1, then no bits will be removed.
* If the vlc code is invalid and max_depth>1, then the number of bits removed
@ -478,7 +484,8 @@ void ff_free_vlc(VLC *vlc);
SKIP_BITS(name, gb, n); \
} while (0)
#define GET_RL_VLC(level, run, name, gb, table, bits, max_depth, need_update) \
#define GET_RL_VLC(level, run, name, gb, table, bits, \
max_depth, need_update) \
do { \
int n, nb_bits; \
unsigned int index; \
@ -503,7 +510,6 @@ void ff_free_vlc(VLC *vlc);
SKIP_BITS(name, gb, n); \
} while (0)
/**
* Parse a vlc code.
* @param bits is the number of bits which will be read at once, must be
@ -523,6 +529,7 @@ static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE (*table)[2],
GET_VLC(code, re, s, table, bits, max_depth);
CLOSE_READER(re, s);
return code;
}
@ -556,9 +563,8 @@ static inline void print_bin(int bits, int n)
{
int i;
for (i = n-1; i >= 0; i--) {
for (i = n - 1; i >= 0; i--)
av_log(NULL, AV_LOG_DEBUG, "%d", (bits >> i) & 1);
}
for (i = n; i < 24; i++)
av_log(NULL, AV_LOG_DEBUG, " ");
}
@ -571,8 +577,10 @@ static inline int get_bits_trace(GetBitContext *s, int n, const char *file,
print_bin(r, n);
av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d bit @%5d in %s %s:%d\n",
r, n, r, get_bits_count(s) - n, file, func, line);
return r;
}
static inline int get_vlc_trace(GetBitContext *s, VLC_TYPE (*table)[2],
int bits, int max_depth, const char *file,
const char *func, int line)
@ -587,8 +595,10 @@ static inline int get_vlc_trace(GetBitContext *s, VLC_TYPE (*table)[2],
av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d vlc @%5d in %s %s:%d\n",
bits2, len, r, pos, file, func, line);
return r;
}
static inline int get_xbits_trace(GetBitContext *s, int n, const char *file,
const char *func, int line)
{
@ -598,12 +608,14 @@ static inline int get_xbits_trace(GetBitContext *s, int n, const char *file,
print_bin(show, n);
av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d xbt @%5d in %s %s:%d\n",
show, n, r, get_bits_count(s) - n, file, func, line);
return r;
}
#define get_bits(s, n) get_bits_trace(s , n, __FILE__, __PRETTY_FUNCTION__, __LINE__)
#define get_bits1(s) get_bits_trace(s, 1, __FILE__, __PRETTY_FUNCTION__, __LINE__)
#define get_xbits(s, n) get_xbits_trace(s, n, __FILE__, __PRETTY_FUNCTION__, __LINE__)
#define get_vlc(s, vlc) get_vlc_trace(s, (vlc)->table, (vlc)->bits, 3, __FILE__, __PRETTY_FUNCTION__, __LINE__)
#define get_vlc2(s, tab, bits, max) get_vlc_trace(s, tab, bits, max, __FILE__, __PRETTY_FUNCTION__, __LINE__)

7
libavcodec/put_bits.h
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@ -29,6 +29,7 @@
#include <stdint.h>
#include <stdlib.h>
#include <assert.h>
#include "libavutil/bswap.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
@ -49,7 +50,8 @@ typedef struct PutBitContext {
* @param buffer the buffer where to put bits
* @param buffer_size the size in bytes of buffer
*/
static inline void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
static inline void init_put_bits(PutBitContext *s, uint8_t *buffer,
int buffer_size)
{
if (buffer_size < 0) {
buffer_size = 0;
@ -111,7 +113,8 @@ void avpriv_align_put_bits(PutBitContext *s);
*
* @param terminate_string 0-terminates the written string if value is 1
*/
void avpriv_put_string(PutBitContext *pb, const char *string, int terminate_string);
void avpriv_put_string(PutBitContext *pb, const char *string,
int terminate_string);
/**
* Copy the content of src to the bitstream.

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