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https://github.com/FFmpeg/FFmpeg.git
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Sanitise get_bits macros, part 1
Some of the macros in get_bits.h include a final semicolon,
some do not. This removes these or adds do {} while(0) around
the macros as appropriate and adds semicolons where needed in
calling code.
Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard
parent
938f72e199
commit
bf5f9b528b
@ -127,37 +127,37 @@ for examples see get_bits, show_bits, skip_bits, get_vlc
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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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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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(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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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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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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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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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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name##_index += (num)
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# define SKIP_BITS(name, gb, num)\
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{\
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SKIP_CACHE(name, gb, num)\
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SKIP_COUNTER(name, gb, num)\
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}\
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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 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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# 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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@ -192,15 +192,16 @@ static inline void skip_bits_long(GetBitContext *s, int n){
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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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uint32_t * name##_buffer_ptr=(gb)->buffer_ptr
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# define CLOSE_READER(name, gb)\
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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)\
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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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@ -208,6 +209,7 @@ static inline void skip_bits_long(GetBitContext *s, int n){
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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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@ -216,22 +218,23 @@ static inline void skip_bits_long(GetBitContext *s, int n){
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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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)
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#else
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# define SKIP_CACHE(name, gb, 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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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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name##_bit_count += (num)
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# define SKIP_BITS(name, gb, num)\
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{\
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SKIP_CACHE(name, gb, num)\
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SKIP_COUNTER(name, gb, num)\
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}\
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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 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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@ -250,14 +253,14 @@ static inline int get_bits_count(const GetBitContext *s){
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}
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static inline void skip_bits_long(GetBitContext *s, int n){
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OPEN_READER(re, s)
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OPEN_READER(re, s);
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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_cache1 = 0;
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UPDATE_CACHE(re, s)
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CLOSE_READER(re, s)
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UPDATE_CACHE(re, s);
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CLOSE_READER(re, s);
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}
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#endif
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@ -271,22 +274,22 @@ static inline void skip_bits_long(GetBitContext *s, int n){
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static inline int get_xbits(GetBitContext *s, int n){
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register int sign;
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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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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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LAST_SKIP_BITS(re, s, n)
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CLOSE_READER(re, s)
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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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}
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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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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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LAST_SKIP_BITS(re, s, n)
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CLOSE_READER(re, s)
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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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}
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@ -295,11 +298,11 @@ static inline int get_sbits(GetBitContext *s, int n){
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*/
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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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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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LAST_SKIP_BITS(re, s, n)
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CLOSE_READER(re, s)
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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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}
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@ -308,8 +311,8 @@ static inline unsigned int get_bits(GetBitContext *s, int n){
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*/
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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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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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return tmp;
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@ -317,10 +320,10 @@ static inline unsigned int show_bits(GetBitContext *s, int n){
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static inline void skip_bits(GetBitContext *s, int n){
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//Note gcc seems to optimize this to s->index+=n for the ALT_READER :))
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OPEN_READER(re, s)
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UPDATE_CACHE(re, s)
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LAST_SKIP_BITS(re, s, n)
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CLOSE_READER(re, s)
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OPEN_READER(re, s);
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UPDATE_CACHE(re, s);
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LAST_SKIP_BITS(re, s, n);
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CLOSE_READER(re, s);
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}
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static inline unsigned int get_bits1(GetBitContext *s){
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@ -449,12 +452,12 @@ int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
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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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{\
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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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}
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} while (0)
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/**
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@ -464,7 +467,7 @@ void free_vlc(VLC *vlc);
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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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{\
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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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@ -473,8 +476,8 @@ void free_vlc(VLC *vlc);
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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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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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@ -482,8 +485,8 @@ void free_vlc(VLC *vlc);
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code = table[index][0];\
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n = table[index][1];\
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if(max_depth > 2 && n < 0){\
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LAST_SKIP_BITS(name, gb, nb_bits)\
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UPDATE_CACHE(name, gb)\
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LAST_SKIP_BITS(name, gb, nb_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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@ -492,11 +495,11 @@ void free_vlc(VLC *vlc);
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n = table[index][1];\
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}\
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}\
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SKIP_BITS(name, gb, n)\
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}
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SKIP_BITS(name, gb, n);\
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} while (0)
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#define GET_RL_VLC(level, run, name, gb, table, bits, max_depth, need_update)\
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{\
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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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@ -505,9 +508,9 @@ void free_vlc(VLC *vlc);
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n = table[index].len;\
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\
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if(max_depth > 1 && n < 0){\
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SKIP_BITS(name, gb, bits)\
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SKIP_BITS(name, gb, bits);\
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if(need_update){\
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UPDATE_CACHE(name, gb)\
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UPDATE_CACHE(name, gb);\
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}\
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\
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nb_bits = -n;\
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@ -517,8 +520,8 @@ void free_vlc(VLC *vlc);
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n = table[index].len;\
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}\
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run= table[index].run;\
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SKIP_BITS(name, gb, n)\
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}
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SKIP_BITS(name, gb, n);\
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} while (0)
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/**
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@ -534,12 +537,12 @@ static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE (*table)[2],
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{
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int code;
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OPEN_READER(re, s)
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UPDATE_CACHE(re, s)
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OPEN_READER(re, s);
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UPDATE_CACHE(re, s);
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GET_VLC(code, re, s, table, bits, max_depth)
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GET_VLC(code, re, s, table, bits, max_depth);
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CLOSE_READER(re, s)
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CLOSE_READER(re, s);
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return code;
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}
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@ -416,16 +416,16 @@ static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
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block[0] = val;
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/* AC coefs */
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i = 0;
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{OPEN_READER(re, &s->gb)
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{OPEN_READER(re, &s->gb);
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do {
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UPDATE_CACHE(re, &s->gb);
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GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
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GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
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i += ((unsigned)code) >> 4;
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code &= 0xf;
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if(code){
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if(code > MIN_CACHE_BITS - 16){
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UPDATE_CACHE(re, &s->gb)
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UPDATE_CACHE(re, &s->gb);
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}
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{
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int cache=GET_CACHE(re,&s->gb);
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@ -433,7 +433,7 @@ static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
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level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
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}
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LAST_SKIP_BITS(re, &s->gb, code)
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LAST_SKIP_BITS(re, &s->gb, code);
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if (i > 63) {
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av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
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@ -443,7 +443,7 @@ static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
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block[j] = level * quant_matrix[j];
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}
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}while(i<63);
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CLOSE_READER(re, &s->gb)}
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CLOSE_READER(re, &s->gb);}
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return 0;
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}
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@ -475,17 +475,17 @@ static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8
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(*EOBRUN)--;
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return 0;
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}
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{OPEN_READER(re, &s->gb)
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{OPEN_READER(re, &s->gb);
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for(i=ss;;i++) {
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UPDATE_CACHE(re, &s->gb);
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GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2)
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GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
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run = ((unsigned) code) >> 4;
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code &= 0xF;
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if(code) {
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i += run;
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if(code > MIN_CACHE_BITS - 16){
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UPDATE_CACHE(re, &s->gb)
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UPDATE_CACHE(re, &s->gb);
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}
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{
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int cache=GET_CACHE(re,&s->gb);
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@ -493,7 +493,7 @@ static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8
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level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
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}
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LAST_SKIP_BITS(re, &s->gb, code)
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LAST_SKIP_BITS(re, &s->gb, code);
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if (i >= se) {
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if(i == se){
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@ -525,7 +525,7 @@ static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8
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}
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}
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}
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CLOSE_READER(re, &s->gb)}
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CLOSE_READER(re, &s->gb);}
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if(i > *last_nnz)
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*last_nnz = i;
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return 0;
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@ -569,7 +569,7 @@ static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_
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else {
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for(;;i++) {
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UPDATE_CACHE(re, &s->gb);
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GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2)
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GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
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if(code & 0xF) {
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run = ((unsigned) code) >> 4;
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@ -583,7 +583,7 @@ static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_
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if(i == se) {
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if(i > *last_nnz)
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*last_nnz = i;
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CLOSE_READER(re, &s->gb)
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CLOSE_READER(re, &s->gb);
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return 0;
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}
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}else{
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