mirror of https://git.ffmpeg.org/ffmpeg.git
Sanitise get_bits macros, part 2
These whitespace changes improve the readability of the get_bits macros. Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard
parent
bf5f9b528b
commit
fb5c841d5f
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@ -125,56 +125,46 @@ for examples see get_bits, show_bits, skip_bits, get_vlc
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#ifdef ALT_BITSTREAM_READER
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# define MIN_CACHE_BITS 25
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# define OPEN_READER(name, gb)\
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unsigned int name##_index= (gb)->index;\
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int name##_cache= 0
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# define OPEN_READER(name, gb) \
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unsigned int name##_index = (gb)->index; \
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int name##_cache = 0
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# define CLOSE_READER(name, gb)\
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(gb)->index= name##_index
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# define CLOSE_READER(name, gb) (gb)->index = name##_index
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# ifdef ALT_BITSTREAM_READER_LE
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# define UPDATE_CACHE(name, gb)\
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name##_cache= AV_RL32( ((const uint8_t *)(gb)->buffer)+(name##_index>>3) ) >> (name##_index&0x07)
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# define UPDATE_CACHE(name, gb) \
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name##_cache = AV_RL32(((const uint8_t *)(gb)->buffer)+(name##_index>>3)) >> (name##_index&0x07)
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# define SKIP_CACHE(name, gb, num)\
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name##_cache >>= (num)
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# define SKIP_CACHE(name, gb, num) name##_cache >>= (num)
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# else
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# define UPDATE_CACHE(name, gb)\
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name##_cache= AV_RB32( ((const uint8_t *)(gb)->buffer)+(name##_index>>3) ) << (name##_index&0x07)
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# define UPDATE_CACHE(name, gb) \
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name##_cache = AV_RB32(((const uint8_t *)(gb)->buffer)+(name##_index>>3)) << (name##_index&0x07)
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# define SKIP_CACHE(name, gb, num)\
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name##_cache <<= (num)
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# define SKIP_CACHE(name, gb, num) name##_cache <<= (num)
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# endif
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// FIXME name?
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# define SKIP_COUNTER(name, gb, num)\
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name##_index += (num)
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# define SKIP_COUNTER(name, gb, num) name##_index += (num)
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# define SKIP_BITS(name, gb, num)\
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do {\
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SKIP_CACHE(name, gb, num);\
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SKIP_COUNTER(name, gb, num);\
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} while (0)
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# define SKIP_BITS(name, gb, num) do { \
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SKIP_CACHE(name, gb, num); \
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SKIP_COUNTER(name, gb, num); \
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} while (0)
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# define LAST_SKIP_BITS(name, gb, num) SKIP_COUNTER(name, gb, num)
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# define LAST_SKIP_CACHE(name, gb, num)
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# ifdef ALT_BITSTREAM_READER_LE
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# define SHOW_UBITS(name, gb, num)\
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zero_extend(name##_cache, num)
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# define SHOW_UBITS(name, gb, num) zero_extend(name##_cache, num)
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# define SHOW_SBITS(name, gb, num)\
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sign_extend(name##_cache, num)
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# define SHOW_SBITS(name, gb, num) sign_extend(name##_cache, num)
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# else
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# define SHOW_UBITS(name, gb, num)\
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NEG_USR32(name##_cache, num)
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# define SHOW_UBITS(name, gb, num) NEG_USR32(name##_cache, num)
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# define SHOW_SBITS(name, gb, num)\
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NEG_SSR32(name##_cache, num)
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# define SHOW_SBITS(name, gb, num) NEG_SSR32(name##_cache, num)
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# endif
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# define GET_CACHE(name, gb)\
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((uint32_t)name##_cache)
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# define GET_CACHE(name, gb) ((uint32_t)name##_cache)
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static inline int get_bits_count(const GetBitContext *s){
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return s->index;
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@ -188,67 +178,60 @@ static inline void skip_bits_long(GetBitContext *s, int n){
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# define MIN_CACHE_BITS 32
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# define OPEN_READER(name, gb)\
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int name##_bit_count=(gb)->bit_count;\
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uint32_t name##_cache0= (gb)->cache0;\
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uint32_t name##_cache1= (gb)->cache1;\
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uint32_t * name##_buffer_ptr=(gb)->buffer_ptr
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# define OPEN_READER(name, gb) \
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int name##_bit_count = (gb)->bit_count; \
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uint32_t name##_cache0 = (gb)->cache0; \
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uint32_t name##_cache1 = (gb)->cache1; \
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uint32_t *name##_buffer_ptr = (gb)->buffer_ptr
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# define CLOSE_READER(name, gb) do {\
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(gb)->bit_count= name##_bit_count;\
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(gb)->cache0= name##_cache0;\
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(gb)->cache1= name##_cache1;\
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(gb)->buffer_ptr= name##_buffer_ptr;\
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# define CLOSE_READER(name, gb) do { \
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(gb)->bit_count = name##_bit_count; \
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(gb)->cache0 = name##_cache0; \
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(gb)->cache1 = name##_cache1; \
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(gb)->buffer_ptr = name##_buffer_ptr; \
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} while (0)
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# define UPDATE_CACHE(name, gb) do {\
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if(name##_bit_count > 0){\
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const uint32_t next= av_be2ne32( *name##_buffer_ptr );\
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name##_cache0 |= NEG_USR32(next,name##_bit_count);\
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name##_cache1 |= next<<name##_bit_count;\
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name##_buffer_ptr++;\
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name##_bit_count-= 32;\
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}\
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} while (0)
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# define UPDATE_CACHE(name, gb) do { \
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if(name##_bit_count > 0){ \
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const uint32_t next = av_be2ne32(*name##_buffer_ptr); \
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name##_cache0 |= NEG_USR32(next, name##_bit_count); \
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name##_cache1 |= next << name##_bit_count; \
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name##_buffer_ptr++; \
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name##_bit_count -= 32; \
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} \
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} while (0)
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#if ARCH_X86
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# define SKIP_CACHE(name, gb, num)\
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__asm__(\
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"shldl %2, %1, %0 \n\t"\
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"shll %2, %1 \n\t"\
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: "+r" (name##_cache0), "+r" (name##_cache1)\
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: "Ic" ((uint8_t)(num))\
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)
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# define SKIP_CACHE(name, gb, num) \
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__asm__("shldl %2, %1, %0 \n\t" \
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"shll %2, %1 \n\t" \
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: "+r" (name##_cache0), "+r" (name##_cache1) \
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: "Ic" ((uint8_t)(num)))
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#else
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# define SKIP_CACHE(name, gb, num) do {\
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name##_cache0 <<= (num);\
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name##_cache0 |= NEG_USR32(name##_cache1,num);\
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name##_cache1 <<= (num);\
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# define SKIP_CACHE(name, gb, num) do { \
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name##_cache0 <<= (num); \
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name##_cache0 |= NEG_USR32(name##_cache1,num); \
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name##_cache1 <<= (num); \
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} while (0)
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#endif
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# define SKIP_COUNTER(name, gb, num)\
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name##_bit_count += (num)
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# define SKIP_COUNTER(name, gb, num) name##_bit_count += (num)
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# define SKIP_BITS(name, gb, num)\
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do {\
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SKIP_CACHE(name, gb, num);\
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SKIP_COUNTER(name, gb, num);\
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} while (0)
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# define SKIP_BITS(name, gb, num) do { \
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SKIP_CACHE(name, gb, num); \
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SKIP_COUNTER(name, gb, num); \
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} while (0)
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# define LAST_SKIP_BITS(name, gb, num) SKIP_BITS(name, gb, num)
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# define LAST_SKIP_BITS(name, gb, num) SKIP_BITS(name, gb, num)
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# define LAST_SKIP_CACHE(name, gb, num) SKIP_CACHE(name, gb, num)
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# define SHOW_UBITS(name, gb, num)\
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NEG_USR32(name##_cache0, num)
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# define SHOW_UBITS(name, gb, num) NEG_USR32(name##_cache0, num)
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# define SHOW_SBITS(name, gb, num)\
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NEG_SSR32(name##_cache0, num)
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# define SHOW_SBITS(name, gb, num) NEG_SSR32(name##_cache0, num)
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# define GET_CACHE(name, gb)\
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(name##_cache0)
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# define GET_CACHE(name, gb) name##_cache0
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static inline int get_bits_count(const GetBitContext *s){
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static inline int get_bits_count(const GetBitContext *s) {
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return ((uint8_t*)s->buffer_ptr - s->buffer)*8 - 32 + s->bit_count;
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}
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@ -257,7 +240,7 @@ static inline void skip_bits_long(GetBitContext *s, int n){
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re_bit_count += n;
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re_buffer_ptr += re_bit_count>>5;
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re_bit_count &= 31;
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re_cache0 = av_be2ne32( re_buffer_ptr[-1] ) << re_bit_count;
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re_cache0 = av_be2ne32(re_buffer_ptr[-1]) << re_bit_count;
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re_cache1 = 0;
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UPDATE_CACHE(re, s);
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CLOSE_READER(re, s);
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@ -276,8 +259,8 @@ static inline int get_xbits(GetBitContext *s, int n){
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register int32_t cache;
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OPEN_READER(re, s);
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UPDATE_CACHE(re, s);
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cache = GET_CACHE(re,s);
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sign=(~cache)>>31;
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cache = GET_CACHE(re, s);
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sign = ~cache >> 31;
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LAST_SKIP_BITS(re, s, n);
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CLOSE_READER(re, s);
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return (NEG_USR32(sign ^ cache, n) ^ sign) - sign;
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@ -287,7 +270,7 @@ static inline int get_sbits(GetBitContext *s, int n){
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register int tmp;
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OPEN_READER(re, s);
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UPDATE_CACHE(re, s);
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tmp= SHOW_SBITS(re, s, n);
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tmp = SHOW_SBITS(re, s, n);
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LAST_SKIP_BITS(re, s, n);
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CLOSE_READER(re, s);
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return tmp;
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@ -300,7 +283,7 @@ static inline unsigned int get_bits(GetBitContext *s, int n){
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register int tmp;
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OPEN_READER(re, s);
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UPDATE_CACHE(re, s);
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tmp= SHOW_UBITS(re, s, n);
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tmp = SHOW_UBITS(re, s, n);
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LAST_SKIP_BITS(re, s, n);
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CLOSE_READER(re, s);
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return tmp;
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@ -313,8 +296,7 @@ static inline unsigned int show_bits(GetBitContext *s, int n){
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register int tmp;
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OPEN_READER(re, s);
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UPDATE_CACHE(re, s);
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tmp= SHOW_UBITS(re, s, n);
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// CLOSE_READER(re, s)
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tmp = SHOW_UBITS(re, s, n);
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return tmp;
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}
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@ -328,17 +310,17 @@ static inline void skip_bits(GetBitContext *s, int n){
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static inline unsigned int get_bits1(GetBitContext *s){
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#ifdef ALT_BITSTREAM_READER
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unsigned int index= s->index;
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uint8_t result= s->buffer[ index>>3 ];
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unsigned int index = s->index;
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uint8_t result = s->buffer[index>>3];
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#ifdef ALT_BITSTREAM_READER_LE
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result>>= (index&0x07);
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result&= 1;
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result >>= index & 7;
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result &= 1;
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#else
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result<<= (index&0x07);
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result>>= 8 - 1;
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result <<= index & 7;
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result >>= 8 - 1;
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#endif
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index++;
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s->index= index;
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s->index = index;
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return result;
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#else
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@ -358,13 +340,13 @@ static inline void skip_bits1(GetBitContext *s){
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* reads 0-32 bits.
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*/
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static inline unsigned int get_bits_long(GetBitContext *s, int n){
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if(n<=MIN_CACHE_BITS) return get_bits(s, n);
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else{
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if (n <= MIN_CACHE_BITS) return get_bits(s, n);
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else {
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#ifdef ALT_BITSTREAM_READER_LE
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int ret= get_bits(s, 16);
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int ret = get_bits(s, 16);
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return ret | (get_bits(s, n-16) << 16);
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#else
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int ret= get_bits(s, 16) << (n-16);
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int ret = get_bits(s, 16) << (n-16);
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return ret | get_bits(s, n-16);
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#endif
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}
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@ -381,17 +363,17 @@ static inline int get_sbits_long(GetBitContext *s, int n) {
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* shows 0-32 bits.
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*/
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static inline unsigned int show_bits_long(GetBitContext *s, int n){
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if(n<=MIN_CACHE_BITS) return show_bits(s, n);
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else{
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GetBitContext gb= *s;
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if (n <= MIN_CACHE_BITS) return show_bits(s, n);
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else {
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GetBitContext gb = *s;
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return get_bits_long(&gb, n);
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}
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}
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static inline int check_marker(GetBitContext *s, const char *msg)
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{
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int bit= get_bits1(s);
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if(!bit)
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int bit = get_bits1(s);
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if (!bit)
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av_log(NULL, AV_LOG_INFO, "Marker bit missing %s\n", msg);
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return bit;
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@ -409,38 +391,38 @@ static inline int check_marker(GetBitContext *s, const char *msg)
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static inline void init_get_bits(GetBitContext *s,
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const uint8_t *buffer, int bit_size)
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{
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int buffer_size= (bit_size+7)>>3;
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if(buffer_size < 0 || bit_size < 0) {
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int buffer_size = (bit_size+7)>>3;
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if (buffer_size < 0 || bit_size < 0) {
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buffer_size = bit_size = 0;
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buffer = NULL;
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}
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s->buffer= buffer;
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s->size_in_bits= bit_size;
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s->buffer_end= buffer + buffer_size;
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s->buffer = buffer;
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s->size_in_bits = bit_size;
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s->buffer_end = buffer + buffer_size;
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#ifdef ALT_BITSTREAM_READER
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s->index=0;
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s->index = 0;
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#elif defined A32_BITSTREAM_READER
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s->buffer_ptr = (uint32_t*)((intptr_t)buffer&(~3));
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s->bit_count = 32 + 8*((intptr_t)buffer&3);
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s->buffer_ptr = (uint32_t*)((intptr_t)buffer & ~3);
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s->bit_count = 32 + 8*((intptr_t)buffer & 3);
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skip_bits_long(s, 0);
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#endif
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}
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static inline void align_get_bits(GetBitContext *s)
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{
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int n= (-get_bits_count(s)) & 7;
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if(n) skip_bits(s, n);
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int n = -get_bits_count(s) & 7;
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if (n) skip_bits(s, n);
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}
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#define init_vlc(vlc, nb_bits, nb_codes,\
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bits, bits_wrap, bits_size,\
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codes, codes_wrap, codes_size,\
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flags)\
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init_vlc_sparse(vlc, nb_bits, nb_codes,\
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bits, bits_wrap, bits_size,\
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codes, codes_wrap, codes_size,\
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NULL, 0, 0, flags)
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#define init_vlc(vlc, nb_bits, nb_codes, \
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bits, bits_wrap, bits_size, \
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codes, codes_wrap, codes_size, \
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flags) \
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init_vlc_sparse(vlc, nb_bits, nb_codes, \
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bits, bits_wrap, bits_size, \
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codes, codes_wrap, codes_size, \
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NULL, 0, 0, flags)
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int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
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const void *bits, int bits_wrap, int bits_size,
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@ -451,13 +433,12 @@ int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
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#define INIT_VLC_USE_NEW_STATIC 4
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void free_vlc(VLC *vlc);
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#define INIT_VLC_STATIC(vlc, bits, a,b,c,d,e,f,g, static_size)\
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do {\
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static VLC_TYPE table[static_size][2];\
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(vlc)->table= table;\
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(vlc)->table_allocated= static_size;\
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init_vlc(vlc, bits, a,b,c,d,e,f,g, INIT_VLC_USE_NEW_STATIC);\
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} while (0)
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#define INIT_VLC_STATIC(vlc, bits, a,b,c,d,e,f,g, static_size) do { \
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static VLC_TYPE table[static_size][2]; \
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(vlc)->table = table; \
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(vlc)->table_allocated = static_size; \
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init_vlc(vlc, bits, a,b,c,d,e,f,g, INIT_VLC_USE_NEW_STATIC); \
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} while (0)
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/**
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@ -466,62 +447,60 @@ do {\
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* If the vlc code is invalid and max_depth>1, then the number of bits removed
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* is undefined.
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*/
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#define GET_VLC(code, name, gb, table, bits, max_depth)\
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do {\
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int n, nb_bits;\
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unsigned int index;\
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\
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index= SHOW_UBITS(name, gb, bits);\
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code = table[index][0];\
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n = table[index][1];\
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\
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if(max_depth > 1 && n < 0){\
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LAST_SKIP_BITS(name, gb, bits);\
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UPDATE_CACHE(name, gb);\
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\
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nb_bits = -n;\
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\
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index= SHOW_UBITS(name, gb, nb_bits) + code;\
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code = table[index][0];\
|
||||
n = table[index][1];\
|
||||
if(max_depth > 2 && n < 0){\
|
||||
LAST_SKIP_BITS(name, gb, nb_bits);\
|
||||
UPDATE_CACHE(name, gb);\
|
||||
\
|
||||
nb_bits = -n;\
|
||||
\
|
||||
index= SHOW_UBITS(name, gb, nb_bits) + code;\
|
||||
code = table[index][0];\
|
||||
n = table[index][1];\
|
||||
}\
|
||||
}\
|
||||
SKIP_BITS(name, gb, n);\
|
||||
} while (0)
|
||||
#define GET_VLC(code, name, gb, table, bits, max_depth) do { \
|
||||
int n, nb_bits; \
|
||||
unsigned int index; \
|
||||
\
|
||||
index = SHOW_UBITS(name, gb, bits); \
|
||||
code = table[index][0]; \
|
||||
n = table[index][1]; \
|
||||
\
|
||||
if (max_depth > 1 && n < 0) { \
|
||||
LAST_SKIP_BITS(name, gb, bits); \
|
||||
UPDATE_CACHE(name, gb); \
|
||||
\
|
||||
nb_bits = -n; \
|
||||
\
|
||||
index = SHOW_UBITS(name, gb, nb_bits) + code; \
|
||||
code = table[index][0]; \
|
||||
n = table[index][1]; \
|
||||
if (max_depth > 2 && n < 0) { \
|
||||
LAST_SKIP_BITS(name, gb, nb_bits); \
|
||||
UPDATE_CACHE(name, gb); \
|
||||
\
|
||||
nb_bits = -n; \
|
||||
\
|
||||
index = SHOW_UBITS(name, gb, nb_bits) + code; \
|
||||
code = table[index][0]; \
|
||||
n = table[index][1]; \
|
||||
} \
|
||||
} \
|
||||
SKIP_BITS(name, gb, n); \
|
||||
} while (0)
|
||||
|
||||
#define GET_RL_VLC(level, run, name, gb, table, bits, max_depth, need_update)\
|
||||
do {\
|
||||
int n, nb_bits;\
|
||||
unsigned int index;\
|
||||
\
|
||||
index= SHOW_UBITS(name, gb, bits);\
|
||||
level = table[index].level;\
|
||||
n = table[index].len;\
|
||||
\
|
||||
if(max_depth > 1 && n < 0){\
|
||||
SKIP_BITS(name, gb, bits);\
|
||||
if(need_update){\
|
||||
UPDATE_CACHE(name, gb);\
|
||||
}\
|
||||
\
|
||||
nb_bits = -n;\
|
||||
\
|
||||
index= SHOW_UBITS(name, gb, nb_bits) + level;\
|
||||
level = table[index].level;\
|
||||
n = table[index].len;\
|
||||
}\
|
||||
run= table[index].run;\
|
||||
SKIP_BITS(name, gb, n);\
|
||||
} while (0)
|
||||
#define GET_RL_VLC(level, run, name, gb, table, bits, max_depth, need_update) do { \
|
||||
int n, nb_bits; \
|
||||
unsigned int index; \
|
||||
\
|
||||
index = SHOW_UBITS(name, gb, bits); \
|
||||
level = table[index].level; \
|
||||
n = table[index].len; \
|
||||
\
|
||||
if (max_depth > 1 && n < 0) { \
|
||||
SKIP_BITS(name, gb, bits); \
|
||||
if (need_update) { \
|
||||
UPDATE_CACHE(name, gb); \
|
||||
} \
|
||||
\
|
||||
nb_bits = -n; \
|
||||
\
|
||||
index = SHOW_UBITS(name, gb, nb_bits) + level; \
|
||||
level = table[index].level; \
|
||||
n = table[index].len; \
|
||||
} \
|
||||
run = table[index].run; \
|
||||
SKIP_BITS(name, gb, n); \
|
||||
} while (0)
|
||||
|
||||
|
||||
/**
|
||||
|
|
@ -552,38 +531,45 @@ static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE (*table)[2],
|
|||
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++)
|
||||
for (i = n; i < 24; i++)
|
||||
av_log(NULL, AV_LOG_DEBUG, " ");
|
||||
}
|
||||
|
||||
static inline int get_bits_trace(GetBitContext *s, int n, char *file, const char *func, int line){
|
||||
int r= get_bits(s, n);
|
||||
static inline int get_bits_trace(GetBitContext *s, int n, char *file,
|
||||
const char *func, int line){
|
||||
int r = get_bits(s, n);
|
||||
|
||||
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);
|
||||
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, char *file, const char *func, int line){
|
||||
int show= show_bits(s, 24);
|
||||
int pos= get_bits_count(s);
|
||||
int r= get_vlc2(s, table, bits, max_depth);
|
||||
int len= get_bits_count(s) - pos;
|
||||
int bits2= show>>(24-len);
|
||||
static inline int get_vlc_trace(GetBitContext *s, VLC_TYPE (*table)[2],
|
||||
int bits, int max_depth, char *file,
|
||||
const char *func, int line){
|
||||
int show = show_bits(s, 24);
|
||||
int pos = get_bits_count(s);
|
||||
int r = get_vlc2(s, table, bits, max_depth);
|
||||
int len = get_bits_count(s) - pos;
|
||||
int bits2 = show >> (24-len);
|
||||
|
||||
print_bin(bits2, len);
|
||||
|
||||
av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d vlc @%5d in %s %s:%d\n", bits2, len, r, pos, file, func, line);
|
||||
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, char *file, const char *func, int line){
|
||||
int show= show_bits(s, n);
|
||||
int r= get_xbits(s, n);
|
||||
static inline int get_xbits_trace(GetBitContext *s, int n, char *file,
|
||||
const char *func, int line){
|
||||
int show = show_bits(s, n);
|
||||
int r = get_xbits(s, n);
|
||||
|
||||
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);
|
||||
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;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue