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#ifndef __ALAC__DECOMP_H
#define __ALAC__DECOMP_H
#ifndef ICODE_ATTR_ALAC
#define ICODE_ATTR_ALAC ICODE_ATTR
#endif
/* Always output samples shifted to 28 bits + sign*/
#define ALAC_OUTPUT_DEPTH 29
#define SCALE16 (ALAC_OUTPUT_DEPTH - 16)
#define ALAC_MAX_CHANNELS 2
#define ALAC_BLOCKSIZE 4096 /* Number of samples per channel per block */
typedef struct
{
unsigned char *input_buffer;
int input_buffer_bitaccumulator; /* used so we can do arbitary
bit reads */
int samplesize;
int numchannels;
int bytespersample;
/* 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)
ICODE_ATTR_ALAC;
int alac_decode_frame(alac_file *alac,
unsigned char *inbuffer,
int32_t outputbuffer[ALAC_MAX_CHANNELS][ALAC_BLOCKSIZE],
void (*yield)(void)) ICODE_ATTR_ALAC;
void alac_set_info(alac_file *alac, char *inputbuffer) ICODE_ATTR_ALAC;
#endif /* __ALAC__DECOMP_H */
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