X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=include%2Fvlc_bits.h;h=0f9cbfe93686319fc2285767b8c4019555451f4c;hb=12ade3e3bc975d5426ba4af155b7372c31093b31;hp=774d9558059189e3e5877025b07cfdbeee1bf2f9;hpb=4bfba26a6188ea4aeed87c463ae10860ef921616;p=vlc diff --git a/include/vlc_bits.h b/include/vlc_bits.h index 774d955805..0f9cbfe936 100644 --- a/include/vlc_bits.h +++ b/include/vlc_bits.h @@ -30,38 +30,28 @@ */ typedef struct bs_s -{ - const uint8_t *p_start; - const uint8_t *p; - const uint8_t *p_end; - - unsigned i_left; /* i_count number of available bits */ -} bs_t; - -typedef struct bs_writable_s { uint8_t *p_start; uint8_t *p; uint8_t *p_end; - - unsigned i_left; /* i_count number of available bits */ -} bsw_t; + ssize_t i_left; /* i_count number of available bits */ +} bs_t; -static inline void bs_init( bs_t *s, const void *p_data, unsigned i_data ) +static inline void bs_init( bs_t *s, const void *p_data, size_t i_data ) { - s->p_start = p_data; - s->p = p_data; - s->p_end = s->p + i_data; + s->p_start = (void *)p_data; + s->p = s->p_start; + s->p_end = s->p_start + i_data; s->i_left = 8; } -static inline int bs_pos( bs_t *s ) +static inline int bs_pos( const bs_t *s ) { return( 8 * ( s->p - s->p_start ) + 8 - s->i_left ); } -static inline int bs_eof( bs_t *s ) +static inline int bs_eof( const bs_t *s ) { return( s->p >= s->p_end ? 1: 0 ); } @@ -138,7 +128,7 @@ static inline uint32_t bs_show( bs_t *s, int i_count ) return bs_read( &s_tmp, i_count ); } -static inline void bs_skip( bs_t *s, int i_count ) +static inline void bs_skip( bs_t *s, ssize_t i_count ) { s->i_left -= i_count; @@ -151,67 +141,25 @@ static inline void bs_skip( bs_t *s, int i_count ) } } -/* - * Writable bits stream - */ -static inline void bsw_init_writable( bsw_t *s, void *p_data, unsigned i_data ) -{ - s->p_start = p_data; - s->p = p_data; - s->p_end = s->p + i_data; - s->i_left = 8; -} - -static inline bs_t * bs_from_writable( bsw_t *s ) -{ - return (bs_t *)s; -} - -static inline void bsw_skip( bsw_t *s, int count ) -{ - return bs_skip(bs_from_writable(s), count); -} - -static inline uint32_t bsw_show( bsw_t *s, int count ) -{ - return bs_show(bs_from_writable(s), count); -} - -static inline uint32_t bsw_read1( bsw_t *s ) -{ - return bs_read1(bs_from_writable(s)); -} - -static inline uint32_t bsw_read( bsw_t *s, int count ) -{ - return bs_read(bs_from_writable(s), count); -} - -static inline int bsw_pos( bsw_t *s ) -{ - return bs_pos(bs_from_writable(s)); -} - -static inline int bsw_eof( bsw_t *s ) -{ - return bs_eof(bs_from_writable(s)); -} - - -static inline void bsw_write( bsw_t *s, int i_count, uint32_t i_bits ) +static inline void bs_write( bs_t *s, int i_count, uint32_t i_bits ) { while( i_count > 0 ) { if( s->p >= s->p_end ) + { break; + } i_count--; if( ( i_bits >> i_count )&0x01 ) + { *s->p |= 1 << ( s->i_left - 1 ); + } else + { *s->p &= ~( 1 << ( s->i_left - 1 ) ); - + } s->i_left--; if( s->i_left == 0 ) { @@ -221,7 +169,7 @@ static inline void bsw_write( bsw_t *s, int i_count, uint32_t i_bits ) } } -static inline void bsw_align( bsw_t *s ) +static inline void bs_align( bs_t *s ) { if( s->i_left != 8 ) { @@ -230,16 +178,20 @@ static inline void bsw_align( bsw_t *s ) } } -static inline void bsw_align_0( bsw_t *s ) +static inline void bs_align_0( bs_t *s ) { if( s->i_left != 8 ) - bsw_write( s, s->i_left, 0 ); + { + bs_write( s, s->i_left, 0 ); + } } -static inline void bsw_align_1( bsw_t *s ) +static inline void bs_align_1( bs_t *s ) { while( s->i_left != 8 ) - bsw_write( s, 1, 1 ); + { + bs_write( s, 1, 1 ); + } } #endif