LinuxAudio.h

#pragma once
#if defined(__linux__) && !defined(__ANDROID__)
#include "HephAudioShared.h"
#include "NativeAudio.h"
#include "AudioEvents/AudioDeviceEventArgs.h"
#include "AudioEvents/AudioCaptureEventArgs.h"
#include "Params/AlsaParams.h"
#include <alsa/asoundlib.h>
 
namespace HephAudio
{
    namespace Native
    {
        class HEPH_API LinuxAudio final : public NativeAudio
        {
        public:
            using NativeAudio::InitializeRender;
            using NativeAudio::InitializeCapture;
 
        private:
            static constexpr long volume_max = INT32_MAX;
 
        private:
            AlsaParams params;
            snd_pcm_t* renderPcm;
            snd_pcm_t* capturePcm;
 
        public:
            LinuxAudio();
 
            LinuxAudio(const LinuxAudio&) = delete;
            LinuxAudio& operator=(const LinuxAudio&) = delete;
 
            ~LinuxAudio();
 
            void SetMasterVolume(double volume) override;
            double GetMasterVolume() const override;
            void InitializeRender(AudioDevice* device, AudioFormatInfo format) override;
            void StopRendering() override;
            void InitializeCapture(AudioDevice* device, AudioFormatInfo format) override;
            void StopCapturing() override;
            void GetNativeParams(NativeAudioParams& nativeParams) const override;
            void SetNativeParams(const NativeAudioParams& nativeParams) override;
 
        private:
            bool EnumerateAudioDevices() override;
            void RenderData(useconds_t bufferDuration_us);
            void CaptureData(useconds_t bufferDuration_us);
            snd_pcm_format_t ToPcmFormat(const AudioFormatInfo& format) const;
            snd_pcm_chmap* ToPcmChmap(const AudioFormatInfo& format) const;
        };
    }
}
#endif