audiooutputoss.h

Go to the documentation of this file.

#ifndef AUDIOOUTPUTOSS
#define AUDIOOUTPUTOSS
 
#if __has_include(<sys/soundcard.h>)
#   include <sys/soundcard.h>
#elif __has_include(<soundcard.h>)
#   include <soundcard.h>
#else
#   error attemping to compile OSS support without soundcard.h
#endif
 
#include "audiooutputbase.h"
 
class AudioOutputOSS : public AudioOutputBase
{
  public:
    explicit AudioOutputOSS(const AudioSettings &settings);
    ~AudioOutputOSS() override;
 
    // Volume control
    int GetVolumeChannel(int channel) const override; // VolumeBase
    void SetVolumeChannel(int channel, int volume) override; // VolumeBase
 
  protected:
    // You need to implement the following functions
    bool OpenDevice(void) override; // AudioOutputBase
    void CloseDevice(void) override; // AudioOutputBase
    void WriteAudio(unsigned char *aubuf, int size) override; // AudioOutputBase
    int  GetBufferedOnSoundcard(void) const override; // AudioOutputBase
    AudioOutputSettings* GetOutputSettings(bool digital) override; // AudioOutputBase
 
  private:
    void VolumeInit(void);
    void VolumeCleanup(void);
 
    void SetFragSize(void);
 
    int         m_audioFd      {-1};
    mutable int m_numBadIoctls {0};
 
    // Volume related
    int         m_mixerFd      {-1};
    int         m_control      {SOUND_MIXER_VOLUME};
};
 
#endif