//
// libtgvoip is free and unencumbered public domain software.
// For more information, see http://unlicense.org or the UNLICENSE file
// you should have received with this source code distribution.
//

#ifndef LIBTGVOIP_AUDIOOUTPUTALSA_H
#define LIBTGVOIP_AUDIOOUTPUTALSA_H

#include "../../audio/AudioOutput.h"
#include "../../threading.h"
#include <alsa/asoundlib.h>

namespace tgvoip
{

namespace audio
{

class AudioOutputALSA : public AudioOutput
{
public:
    AudioOutputALSA(std::string devID);
    virtual ~AudioOutputALSA();
    virtual void Start();
    virtual void Stop();
    virtual bool IsPlaying();
    virtual void SetCurrentDevice(std::string devID);
    static void EnumerateDevices(std::vector<AudioOutputDevice>& devs);

private:
    void RunThread();

    int (*m_snd_pcm_open)(snd_pcm_t** pcm, const char* name, snd_pcm_stream_t stream, int mode);
    int (*m_snd_pcm_set_params)(snd_pcm_t* pcm, snd_pcm_format_t format, snd_pcm_access_t access, unsigned int channels, unsigned int rate, int soft_resample, unsigned int latency);
    int (*m_snd_pcm_close)(snd_pcm_t* pcm);
    snd_pcm_sframes_t (*m_snd_pcm_writei)(snd_pcm_t* pcm, const void* buffer, snd_pcm_uframes_t size);
    int (*m_snd_pcm_recover)(snd_pcm_t* pcm, int err, int silent);
    const char* (*m_snd_strerror)(int errnum);
    void* m_lib;

    snd_pcm_t* m_handle;
    Thread* m_thread;
    bool m_isPlaying;
};

} // namespace audio

} // namespace tgvoip

#endif // LIBTGVOIP_AUDIOOUTPUTALSA_H