3f5f3524d4
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24863 a1c6a512-1295-4272-9138-f99709370657
54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/*
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* bitstream.h
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* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
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* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
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*
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* This file is part of a52dec, a free ATSC A-52 stream decoder.
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* See http://liba52.sourceforge.net/ for updates.
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*
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* a52dec is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* a52dec is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define swab32(x) (betoh32(x))
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void a52_bitstream_set_ptr (a52_state_t * state, uint8_t * buf);
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uint32_t a52_bitstream_get_bh (a52_state_t * state, uint32_t num_bits);
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int32_t a52_bitstream_get_bh_2 (a52_state_t * state, uint32_t num_bits);
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static inline uint32_t bitstream_get (a52_state_t * state, uint32_t num_bits)
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{
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uint32_t result;
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if (num_bits < state->bits_left) {
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result = (state->current_word << (32 - state->bits_left)) >> (32 - num_bits);
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state->bits_left -= num_bits;
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return result;
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}
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return a52_bitstream_get_bh (state, num_bits);
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}
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static inline int32_t bitstream_get_2 (a52_state_t * state, uint32_t num_bits)
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{
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int32_t result;
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if (num_bits < state->bits_left) {
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result = (((int32_t)state->current_word) << (32 - state->bits_left)) >> (32 - num_bits);
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state->bits_left -= num_bits;
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return result;
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}
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return a52_bitstream_get_bh_2 (state, num_bits);
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}
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