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Diffstat (limited to 'src/libac3/bitstream.h')
| -rw-r--r-- | src/libac3/bitstream.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/libac3/bitstream.h b/src/libac3/bitstream.h new file mode 100644 index 000000000..392c7401c --- /dev/null +++ b/src/libac3/bitstream.h @@ -0,0 +1,46 @@ +/* + * bitstream.h + * + * Copyright (C) Aaron Holtzman - Dec 1999 + * + * This file is part of ac3dec, a free AC-3 audio decoder + * + * ac3dec is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * ac3dec is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Make; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + + +#include <inttypes.h> + +extern uint32_t ac3bits_left; +extern uint64_t ac3current_word; + +void bitstream_init(uint8_t *start); +inline uint32_t bitstream_get_bh(uint32_t num_bits); + +static inline uint32_t bitstream_get (uint32_t num_bits) +{ + uint32_t result; + + if (num_bits < ac3bits_left) { + result = (ac3current_word << (64 - ac3bits_left)) >> (64 - num_bits); + ac3bits_left -= num_bits; + return result; + } + + return bitstream_get_bh (num_bits); +} + + |