mysound.h

Go to the documentation of this file.

#pragma once
 
#include "config.h"
#include "myarr.h"
#include <alsa/asoundlib.h> // IWYU pragma: export
#include <stdio.h>
 
struct AmpResult
{
    long avg;
    int clipCount;
    int clipStreak;
    int gain_increase_locked;
    int has_increased;
    long min_gain;
    long max_gain;
};
 
typedef struct CaptureCtx
{
    /* ALSA */
    snd_pcm_t* cap;
    unsigned int rate;
    snd_pcm_uframes_t periodSize;
    snd_pcm_uframes_t bufferSize;
    size_t ArrayLength; // frames per processing block
    snd_mixer_t* mixerHandle;
    snd_mixer_elem_t* mixerElem;
    struct AmpResult ampResult;
} CaptureCtx;
 
void open_capture_elem(CaptureCtx* ctx, const CapConfig* cfg);
 
const char* get_default_device(void);
 
// NOLINTNEXTLINE(misc-include-cleaner)
snd_pcm_t* initAudio(snd_pcm_format_t format, char* device, unsigned int* rate);
 
int initAudioSource(CapConfig* cfg, unsigned int* actualRate);
 
int readBufferOrFile(int* derivative,
                     size_t ArrayLength,
                     FILE* fpInput,
                     CaptureCtx* ctx,
                     int16_t* buffer16);
 
int getData(FILE* fpInput,
            struct myarr* derivative,
            CaptureCtx* ctx,
            int16_t* out);
 
void captureTeardown(CaptureCtx* ctx);
 
int captureSetup(CaptureCtx* ctx, CapConfig* cfg, unsigned int rate);
 
int readSamples(snd_pcm_t* cap, size_t ArrayLength, int16_t* out);
 
int get_mic_amplification(const CaptureCtx* ctx, long* value);
 
int set_mic_amplification(const CaptureCtx* ctx, long value);