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author | Dave Chapman <dave@dchapman.com> | 2006-02-07 22:16:35 +0000 |
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committer | Dave Chapman <dave@dchapman.com> | 2006-02-07 22:16:35 +0000 |
commit | 8e46ab85a9a1c50589920897763ce53e593c9369 (patch) | |
tree | 0a0fe757659050c39d6b5160c22311915557abbd /apps/codecs/libffmpegFLAC/shndec.h | |
parent | 6099dc8b77e1b536ff47b4b74edf20f1fafda5b6 (diff) | |
download | rockbox-8e46ab85a9a1c50589920897763ce53e593c9369.tar.gz rockbox-8e46ab85a9a1c50589920897763ce53e593c9369.zip |
Patch #1426489 - Shorten codec optimisations from Mark Arigo
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8615 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs/libffmpegFLAC/shndec.h')
-rw-r--r-- | apps/codecs/libffmpegFLAC/shndec.h | 44 |
1 files changed, 30 insertions, 14 deletions
diff --git a/apps/codecs/libffmpegFLAC/shndec.h b/apps/codecs/libffmpegFLAC/shndec.h index 6b830dcafa..713a5b56dc 100644 --- a/apps/codecs/libffmpegFLAC/shndec.h +++ b/apps/codecs/libffmpegFLAC/shndec.h | |||
@@ -1,11 +1,31 @@ | |||
1 | #include "bitstream.h" | 1 | #include "bitstream.h" |
2 | 2 | ||
3 | #define SHN_OUTPUT_DEPTH 28 | 3 | #define SHN_OUTPUT_DEPTH 28 |
4 | |||
5 | #define MAX_CHANNELS 2 | ||
6 | #define MAX_PRED_ORDER 16 | ||
7 | #define MAX_NWRAP MAX_PRED_ORDER | ||
8 | #define MAX_NMEAN 4 | ||
9 | |||
10 | /* NUM_DEC_LOOPS should be even number */ | ||
11 | #define NUM_DEC_LOOPS 26 | ||
4 | #define DEFAULT_BLOCK_SIZE 256 | 12 | #define DEFAULT_BLOCK_SIZE 256 |
5 | #define MAX_FRAMESIZE 1024 | 13 | #define MAX_HEADER_SIZE DEFAULT_BLOCK_SIZE*4 |
6 | #define MAX_CHANNELS 2 | 14 | #define MAX_BUFFER_SIZE 2*DEFAULT_BLOCK_SIZE*NUM_DEC_LOOPS |
7 | #define MAX_NWRAP 3 | 15 | #define MAX_DECODE_SIZE ((DEFAULT_BLOCK_SIZE*NUM_DEC_LOOPS/2) + MAX_NWRAP) |
8 | #define MAX_NMEAN 4 | 16 | #define MAX_OFFSET_SIZE MAX_NMEAN |
17 | |||
18 | #define FN_DIFF0 0 | ||
19 | #define FN_DIFF1 1 | ||
20 | #define FN_DIFF2 2 | ||
21 | #define FN_DIFF3 3 | ||
22 | #define FN_QUIT 4 | ||
23 | #define FN_BLOCKSIZE 5 | ||
24 | #define FN_BITSHIFT 6 | ||
25 | #define FN_QLPC 7 | ||
26 | #define FN_ZERO 8 | ||
27 | #define FN_VERBATIM 9 | ||
28 | #define FN_ERROR 10 | ||
9 | 29 | ||
10 | typedef struct ShortenContext { | 30 | typedef struct ShortenContext { |
11 | GetBitContext gb; | 31 | GetBitContext gb; |
@@ -17,20 +37,16 @@ typedef struct ShortenContext { | |||
17 | int bits_per_sample; | 37 | int bits_per_sample; |
18 | int version; | 38 | int version; |
19 | int bitshift; | 39 | int bitshift; |
40 | int last_bitshift; | ||
20 | int nmean; | 41 | int nmean; |
21 | int nwrap; | 42 | int nwrap; |
22 | int blocksize; | 43 | int blocksize; |
23 | int bitindex; | 44 | int bitindex; |
24 | /* Not needed... | ||
25 | int bit_rate; | ||
26 | int block_align; | ||
27 | int chunk_size; | ||
28 | */ | ||
29 | } ShortenContext; | 45 | } ShortenContext; |
30 | 46 | ||
31 | int shorten_init(ShortenContext* s, uint8_t *buf, int buf_size); | 47 | int shorten_init(ShortenContext* s, uint8_t *buf, int buf_size); |
32 | int shorten_decode_frame(ShortenContext *s, | 48 | int shorten_decode_frames(ShortenContext *s, int *nsamples, |
33 | int32_t *decoded, | 49 | int32_t *decoded0, int32_t *decoded1, |
34 | int32_t *offset, | 50 | int32_t *offset0, int32_t *offset1, |
35 | uint8_t *buf, | 51 | uint8_t *buf, int buf_size, |
36 | int buf_size) ICODE_ATTR; | 52 | void (*yield)(void)) ICODE_ATTR; |