diff options
author | Sean Bartell <wingedtachikoma@gmail.com> | 2011-06-25 21:32:25 -0400 |
---|---|---|
committer | Nils Wallménius <nils@rockbox.org> | 2012-04-25 22:13:20 +0200 |
commit | f40bfc9267b13b54e6379dfe7539447662879d24 (patch) | |
tree | 9b20069d5e62809ff434061ad730096836f916f2 /lib/rbcodec/codecs/liba52/bitstream.h | |
parent | a0009907de7a0107d49040d8a180f140e2eff299 (diff) | |
download | rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.tar.gz rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.zip |
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
Diffstat (limited to 'lib/rbcodec/codecs/liba52/bitstream.h')
-rw-r--r-- | lib/rbcodec/codecs/liba52/bitstream.h | 54 |
1 files changed, 54 insertions, 0 deletions
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 @@ | |||
1 | /* | ||
2 | * bitstream.h | ||
3 | * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org> | ||
4 | * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> | ||
5 | * | ||
6 | * This file is part of a52dec, a free ATSC A-52 stream decoder. | ||
7 | * See http://liba52.sourceforge.net/ for updates. | ||
8 | * | ||
9 | * a52dec is free software; you can redistribute it and/or modify | ||
10 | * it under the terms of the GNU General Public License as published by | ||
11 | * the Free Software Foundation; either version 2 of the License, or | ||
12 | * (at your option) any later version. | ||
13 | * | ||
14 | * a52dec is distributed in the hope that it will be useful, | ||
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
17 | * GNU General Public License for more details. | ||
18 | * | ||
19 | * You should have received a copy of the GNU General Public License | ||
20 | * along with this program; if not, write to the Free Software | ||
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
22 | */ | ||
23 | |||
24 | #define swab32(x) (betoh32(x)) | ||
25 | |||
26 | void a52_bitstream_set_ptr (a52_state_t * state, uint8_t * buf); | ||
27 | uint32_t a52_bitstream_get_bh (a52_state_t * state, uint32_t num_bits); | ||
28 | int32_t a52_bitstream_get_bh_2 (a52_state_t * state, uint32_t num_bits); | ||
29 | |||
30 | static inline uint32_t bitstream_get (a52_state_t * state, uint32_t num_bits) | ||
31 | { | ||
32 | uint32_t result; | ||
33 | |||
34 | if (num_bits < state->bits_left) { | ||
35 | result = (state->current_word << (32 - state->bits_left)) >> (32 - num_bits); | ||
36 | state->bits_left -= num_bits; | ||
37 | return result; | ||
38 | } | ||
39 | |||
40 | return a52_bitstream_get_bh (state, num_bits); | ||
41 | } | ||
42 | |||
43 | static inline int32_t bitstream_get_2 (a52_state_t * state, uint32_t num_bits) | ||
44 | { | ||
45 | int32_t result; | ||
46 | |||
47 | if (num_bits < state->bits_left) { | ||
48 | result = (((int32_t)state->current_word) << (32 - state->bits_left)) >> (32 - num_bits); | ||
49 | state->bits_left -= num_bits; | ||
50 | return result; | ||
51 | } | ||
52 | |||
53 | return a52_bitstream_get_bh_2 (state, num_bits); | ||
54 | } | ||