From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/liba52/bitstream.h | 54 +++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 lib/rbcodec/codecs/liba52/bitstream.h (limited to 'lib/rbcodec/codecs/liba52/bitstream.h') diff --git a/lib/rbcodec/codecs/liba52/bitstream.h b/lib/rbcodec/codecs/liba52/bitstream.h new file mode 100644 index 0000000000..56de1571b7 --- /dev/null +++ b/lib/rbcodec/codecs/liba52/bitstream.h @@ -0,0 +1,54 @@ +/* + * bitstream.h + * Copyright (C) 2000-2003 Michel Lespinasse + * Copyright (C) 1999-2000 Aaron Holtzman + * + * This file is part of a52dec, a free ATSC A-52 stream decoder. + * See http://liba52.sourceforge.net/ for updates. + * + * a52dec 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 of the License, or + * (at your option) any later version. + * + * a52dec 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#define swab32(x) (betoh32(x)) + +void a52_bitstream_set_ptr (a52_state_t * state, uint8_t * buf); +uint32_t a52_bitstream_get_bh (a52_state_t * state, uint32_t num_bits); +int32_t a52_bitstream_get_bh_2 (a52_state_t * state, uint32_t num_bits); + +static inline uint32_t bitstream_get (a52_state_t * state, uint32_t num_bits) +{ + uint32_t result; + + if (num_bits < state->bits_left) { + result = (state->current_word << (32 - state->bits_left)) >> (32 - num_bits); + state->bits_left -= num_bits; + return result; + } + + return a52_bitstream_get_bh (state, num_bits); +} + +static inline int32_t bitstream_get_2 (a52_state_t * state, uint32_t num_bits) +{ + int32_t result; + + if (num_bits < state->bits_left) { + result = (((int32_t)state->current_word) << (32 - state->bits_left)) >> (32 - num_bits); + state->bits_left -= num_bits; + return result; + } + + return a52_bitstream_get_bh_2 (state, num_bits); +} -- cgit v1.2.3