diff options
Diffstat (limited to 'ac3dec/bitstream.h')
| -rw-r--r-- | ac3dec/bitstream.h | 54 |
1 files changed, 11 insertions, 43 deletions
diff --git a/ac3dec/bitstream.h b/ac3dec/bitstream.h index 3351930..f34726a 100644 --- a/ac3dec/bitstream.h +++ b/ac3dec/bitstream.h @@ -21,56 +21,24 @@ * */ -//My new and improved vego-matic endian swapping routine -//(stolen from the kernel) -#ifdef WORDS_BIGENDIAN -# define swab32(x) (x) +#include <inttypes.h> -#else +extern uint32_t bits_left; +extern uint64_t current_word; -# if defined (__i386__) +void bitstream_init(uint8_t *start); +inline uint32_t bitstream_get_bh(uint32_t num_bits); -# define swab32(x) __i386_swab32(x) - static inline const uint_32 __i386_swab32(uint_32 x) - { - __asm__("bswap %0" : "=r" (x) : "0" (x)); - return x; - } - -# else - -# define swab32(x)\ -((((uint_8*)&x)[0] << 24) | (((uint_8*)&x)[1] << 16) | \ - (((uint_8*)&x)[2] << 8) | (((uint_8*)&x)[3])) - -# endif -#endif - -extern uint_32 bits_left; -extern uint_32 current_word; - -void bitstream_init(uint_8 *start); - -uint_8 bitstream_get_byte(void); - -uint_8 *bitstream_get_buffer_start(void); -void bitstream_buffer_frame(uint_32 frame_size); - -uint_32 bitstream_get_bh(uint_32 num_bits); - -static inline uint_32 -bitstream_get(uint_32 num_bits) +static inline uint32_t bitstream_get (uint32_t num_bits) { - uint_32 result; - - if(num_bits < bits_left) - { - result = (current_word << (32 - bits_left)) >> (32 - num_bits); + uint32_t result; + + if (num_bits < bits_left) { + result = (current_word << (64 - bits_left)) >> (64 - num_bits); bits_left -= num_bits; return result; } - return bitstream_get_bh(num_bits); + return bitstream_get_bh (num_bits); } - |