adpcm_pcm_mix_driver.h

#ifndef ADPCM_PCM_MIX_DRIVER_H_
#define ADPCM_PCM_MIX_DRIVER_H_

#include "adpcm_driver.h"
#include "adpcm.h"
#include "mamedef.h"
#include "speex_resampler.h"
#include "fixed_resampler.h"

struct adpcm_mix_driver_channel {
	// 0 = 3.9kHz
	// 1 = 5.2kHz
	// 2 = 7.8kHz
	// 3 = 10.4kHz
	// 4 = 15.6kHz
	int freq_num;
	int volume;

	struct adpcm_status decoder_status;
	uint8_t *data;
	int data_len;
	int data_pos;
	int nybble;
};

struct adpcm_pcm_mix_driver {
	struct adpcm_driver adpcm_driver; // parent

	struct adpcm_mix_driver_channel channels[8];
	struct fixed_resampler resamplers[4];
	struct adpcm_status encoder_status;

	stream_sample_t *decode_buf, *decode_resample_buf, *mix_buf_l, *mix_buf_r;
	int buf_size;

	SpeexResamplerState *output_resampler;
};
int adpcm_pcm_mix_driver_init(struct adpcm_pcm_mix_driver *driver, int sample_rate, int buf_size);
void adpcm_pcm_mix_driver_deinit(struct adpcm_pcm_mix_driver *driver);
int adpcm_pcm_mix_driver_estimate(struct adpcm_pcm_mix_driver *driver, int buf_size);
int adpcm_pcm_mix_driver_run(struct adpcm_pcm_mix_driver *driver, stream_sample_t *buf_l, stream_sample_t *buf_r, int buf_size);

#endif /* ADPCM_PCM_MIX_DRIVER_H_ */