From debbe9747eb6eecfd79aab648212b55220922eb6 Mon Sep 17 00:00:00 2001 From: Dave Chapman Date: Thu, 22 Sep 2005 20:46:58 +0000 Subject: First Rockbox version of ALAC decoder - porting to work in Rockbox environment and some simple (but significant) optimisations git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7544 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/libalac/decomp.h | 30 ++++++++++++++++++++++++++---- 1 file changed, 26 insertions(+), 4 deletions(-) (limited to 'apps/codecs/libalac/decomp.h') diff --git a/apps/codecs/libalac/decomp.h b/apps/codecs/libalac/decomp.h index 23dbc52779..e6fa82d3d7 100644 --- a/apps/codecs/libalac/decomp.h +++ b/apps/codecs/libalac/decomp.h @@ -1,12 +1,34 @@ #ifndef __ALAC__DECOMP_H #define __ALAC__DECOMP_H -typedef struct alac_file alac_file; +typedef struct +{ + unsigned char *input_buffer; + int input_buffer_bitaccumulator; /* used so we can do arbitary + bit reads */ + int samplesize; + int numchannels; + int bytespersample; -alac_file *create_alac(int samplesize, int numchannels); -void decode_frame(alac_file *alac, + /* stuff from setinfo */ + uint32_t setinfo_max_samples_per_frame; /* 0x1000 = 4096 */ /* max samples per frame? */ + uint8_t setinfo_7a; /* 0x00 */ + uint8_t setinfo_sample_size; /* 0x10 */ + uint8_t setinfo_rice_historymult; /* 0x28 */ + uint8_t setinfo_rice_initialhistory; /* 0x0a */ + uint8_t setinfo_rice_kmodifier; /* 0x0e */ + uint8_t setinfo_7f; /* 0x02 */ + uint16_t setinfo_80; /* 0x00ff */ + uint32_t setinfo_82; /* 0x000020e7 */ + uint32_t setinfo_86; /* 0x00069fe4 */ + uint32_t setinfo_8a_rate; /* 0x0000ac44 */ + /* end setinfo stuff */ +} alac_file; + +void create_alac(int samplesize, int numchannels, alac_file* alac); +int16_t* decode_frame(alac_file *alac, unsigned char *inbuffer, - void *outbuffer, int *outputsize); + int *outputsize); void alac_set_info(alac_file *alac, char *inputbuffer); #endif /* __ALAC__DECOMP_H */ -- cgit v1.2.3