xiaozhi/main/boards/esp-box-lite/box_audio_codec_lite.h

#ifndef _BOX_AUDIO_CODEC_LITE_H
#define _BOX_AUDIO_CODEC_LITE_H

#include "audio_codec.h"

#include <esp_codec_dev.h>
#include <esp_codec_dev_defaults.h>

class BoxAudioCodecLite : public AudioCodec {
private:
    const audio_codec_data_if_t* data_if_ = nullptr;
    const audio_codec_ctrl_if_t* out_ctrl_if_ = nullptr;
    const audio_codec_if_t* out_codec_if_ = nullptr;
    const audio_codec_ctrl_if_t* in_ctrl_if_ = nullptr;
    const audio_codec_if_t* in_codec_if_ = nullptr;
    const audio_codec_gpio_if_t* gpio_if_ = nullptr;

    esp_codec_dev_handle_t output_dev_ = nullptr;
    esp_codec_dev_handle_t input_dev_ = nullptr;
    // ref buffer used for aec
    std::vector<int16_t> ref_buffer_;
    int read_pos_ = 0;
    int write_pos_ = 0;

    void CreateDuplexChannels(gpio_num_t mclk, gpio_num_t bclk, gpio_num_t ws, gpio_num_t dout, gpio_num_t din);

    virtual int Read(int16_t* dest, int samples) override;
    virtual int Write(const int16_t* data, int samples) override;

public:
    BoxAudioCodecLite(void* i2c_master_handle, int input_sample_rate, int output_sample_rate,
        gpio_num_t mclk, gpio_num_t bclk, gpio_num_t ws, gpio_num_t dout, gpio_num_t din,
        gpio_num_t pa_pin, bool input_reference);
    virtual ~BoxAudioCodecLite();

    virtual void SetOutputVolume(int volume) override;
    virtual void EnableInput(bool enable) override;
    virtual void EnableOutput(bool enable) override;
};

#endif // _BOX_AUDIO_CODEC_LITE_H