#ifndef DSPTOOL_H
#define DSPTOOL_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>

#define BYTES_PER_FRAME 8
#define SAMPLES_PER_FRAME 14
#define NIBBLES_PER_FRAME 16

#if defined( _WIN32 ) || defined( __CYGWIN__ )
# ifdef BUILD_SHARED
#  define DLLEXPORT __declspec(dllexport)
# elif defined( WHY_ARE_YOU_USING_THIS_AS_A_DLL )
#  define DLLEXPORT __declspec(dllimport)
# else
#  define DLLEXPORT
# endif
#elif __GNUC__ >= 4
# define DLLEXPORT __attribute__((visibility("default")))
#else
# define DLLEXPORT
#endif

typedef struct
{
	int16_t coef[16];
	uint16_t gain;
	uint16_t pred_scale;
	int16_t yn1;
	int16_t yn2;

	uint16_t loop_pred_scale;
	int16_t loop_yn1;
	int16_t loop_yn2;
} ADPCMINFO;

DLLEXPORT void encode(int16_t* src, uint8_t* dst, ADPCMINFO* cxt, uint32_t samples);
DLLEXPORT void decode(uint8_t* src, int16_t* dst, ADPCMINFO* cxt, uint32_t samples);
DLLEXPORT void getLoopContext(uint8_t* src, ADPCMINFO* cxt, uint32_t samples);

DLLEXPORT void encodeFrame(int16_t* src, uint8_t* dst, int16_t* coefs, uint8_t one);
DLLEXPORT void correlateCoefs(int16_t* src, uint32_t samples, int16_t* coefsOut);

DLLEXPORT uint32_t getBytesForAdpcmBuffer(uint32_t samples);
DLLEXPORT uint32_t getBytesForAdpcmSamples(uint32_t samples);
DLLEXPORT uint32_t getBytesForPcmBuffer(uint32_t samples);
DLLEXPORT uint32_t getBytesForPcmSamples(uint32_t samples);
DLLEXPORT uint32_t getNibbleAddress(uint32_t samples);
DLLEXPORT uint32_t getNibblesForNSamples(uint32_t samples);
DLLEXPORT uint32_t getSampleForAdpcmNibble(uint32_t nibble);
DLLEXPORT uint32_t getBytesForAdpcmInfo(void);

#ifdef __cplusplus
}
#endif

#endif