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adpcm-lib.h
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adpcm-lib.h
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////////////////////////////////////////////////////////////////////////////
// **** ADPCM-XQ **** //
// Xtreme Quality ADPCM Encoder/Decoder //
// Copyright (c) 2024 David Bryant. //
// All Rights Reserved. //
// Distributed under the BSD Software License (see license.txt) //
////////////////////////////////////////////////////////////////////////////
#ifndef ADPCMLIB_H_
#define ADPCMLIB_H_
#define NOISE_SHAPING_OFF 0 // flat noise (no shaping)
#define NOISE_SHAPING_STATIC 0x100 // static 1st-order shaping (configurable, highpass default)
#define NOISE_SHAPING_DYNAMIC 0x200 // dynamically tilted noise based on signal
#define LOOKAHEAD_DEPTH 0x0ff // depth of search
#define LOOKAHEAD_EXHAUSTIVE 0x800 // full breadth of search (all branches taken)
#define LOOKAHEAD_NO_BRANCHING 0x400 // no branches taken (internal use only!)
#if defined(_MSC_VER) && _MSC_VER < 1600
typedef unsigned __int64 uint64_t;
typedef unsigned __int32 uint32_t;
typedef unsigned __int16 uint16_t;
typedef unsigned __int8 uint8_t;
typedef __int64 int64_t;
typedef __int32 int32_t;
typedef __int16 int16_t;
typedef __int8 int8_t;
#else
#include <stdint.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* adpcm-lib.c */
int adpcm_sample_count_to_block_size (int sample_count, int num_chans, int bps);
int adpcm_block_size_to_sample_count (int block_size, int num_chans, int bps);
int adpcm_align_block_size (int block_size, int num_chans, int bps, int round_up);
void *adpcm_create_context (int num_channels, int sample_rate, int lookahead, int noise_shaping);
void adpcm_set_shaping_weight (void *p, double shaping_weight);
int adpcm_encode_block_ex (void *p, uint8_t *outbuf, size_t *outbufsize, const int16_t *inbuf, int inbufcount, int bps);
int adpcm_encode_block (void *p, uint8_t *outbuf, size_t *outbufsize, const int16_t *inbuf, int inbufcount);
int adpcm_decode_block_ex (int16_t *outbuf, const uint8_t *inbuf, size_t inbufsize, int channels, int bps);
int adpcm_decode_block (int16_t *outbuf, const uint8_t *inbuf, size_t inbufsize, int channels);
void adpcm_free_context (void *p);
/* adpcm-dns.c */
void generate_dns_values (const int16_t *samples, int sample_count, int num_chans, int sample_rate,
int16_t *values, int16_t min_value, int16_t last_value);
#ifdef __cplusplus
}
#endif
#endif /* ADPCMLIB_H_ */