// Thread: Any. Must be locked: AudioMutex. bool CreatePlaybackDevice() { if (AudioDevice) return true; AudioDevice = alcOpenDevice(nullptr); if (!AudioDevice) { LOG(("Audio Error: Could not create default playback device, enumerating..")); EnumeratePlaybackDevices(); return false; } ALCint attributes[] = { ALC_STEREO_SOURCES, 128, ALC_FREQUENCY, Media::Player::kDefaultFrequency, 0 }; AudioContext = alcCreateContext(AudioDevice, attributes); alcMakeContextCurrent(AudioContext); if (ContextErrorHappened()) { DestroyPlaybackDevice(); return false; } ALfloat v[] = { 0.f, 0.f, -1.f, 0.f, 1.f, 0.f }; alListener3f(AL_POSITION, 0.f, 0.f, 0.f); alListener3f(AL_VELOCITY, 0.f, 0.f, 0.f); alListenerfv(AL_ORIENTATION, v); alDistanceModel(AL_NONE); return true; }
// Thread: Main. Must be locked: AudioMutex. void ClosePlaybackDevice() { if (!AudioDevice) return; LOG(("Audio Info: Closing audio playback device.")); if (Player::mixer()) { Player::mixer()->detachTracks(); } Current().detachTracks(); DestroyPlaybackDevice(); }
// Thread: Any. Must be locked: AudioMutex. bool CreatePlaybackDevice() { if (AudioDevice) return true; AudioDevice = alcOpenDevice(nullptr); if (!AudioDevice) { LOG(("Audio Error: Could not create default playback device, enumerating..")); EnumeratePlaybackDevices(); return false; } ALCint attributes[] = { ALC_STEREO_SOURCES, 128, ALC_FREQUENCY, Media::Player::kDefaultFrequency, 0 }; AudioContext = alcCreateContext(AudioDevice, attributes); alcMakeContextCurrent(AudioContext); if (ContextErrorHappened()) { DestroyPlaybackDevice(); return false; } ALfloat v[] = { 0.f, 0.f, -1.f, 0.f, 1.f, 0.f }; alListener3f(AL_POSITION, 0.f, 0.f, 0.f); alListener3f(AL_VELOCITY, 0.f, 0.f, 0.f); alListenerfv(AL_ORIENTATION, v); #ifndef TDESKTOP_DISABLE_OPENAL_EFFECTS // playback speed related init // generate an effect slot and an effect alGenAuxiliaryEffectSlots(1, &_playbackSpeedData.uiEffectSlot); alGenEffects(1, &_playbackSpeedData.uiEffect); // initialize the pitch shifter effect alEffecti(_playbackSpeedData.uiEffect, AL_EFFECT_TYPE, AL_EFFECT_PITCH_SHIFTER); // 12 semitones = 1 octave alEffecti(_playbackSpeedData.uiEffect, AL_PITCH_SHIFTER_COARSE_TUNE, kPlaybackSpeedTune); // connect the effect with the effect slot alAuxiliaryEffectSloti(_playbackSpeedData.uiEffectSlot, AL_EFFECTSLOT_EFFECT, _playbackSpeedData.uiEffect); // initialize a filter to disable the direct (dry) path alGenFilters(1, &_playbackSpeedData.uiFilter); alFilteri(_playbackSpeedData.uiFilter, AL_FILTER_TYPE, AL_FILTER_LOWPASS); // disable all frequencies alFilterf(_playbackSpeedData.uiFilter, AL_LOWPASS_GAIN, 0.f); // to use the modified playback speed: // connect both the effect slot and filter with the stream source and set AL_PITCH #endif // TDESKTOP_DISABLE_OPENAL_EFFECTS alDistanceModel(AL_NONE); return true; }
// Thread: Main. Must be locked: AudioMutex. void ClosePlaybackDevice(not_null<Instance*> instance) { if (!AudioDevice) return; LOG(("Audio Info: Closing audio playback device.")); #ifndef TDESKTOP_DISABLE_OPENAL_EFFECTS // playback speed related alDeleteFilters(1, &_playbackSpeedData.uiFilter); alDeleteEffects(1, &_playbackSpeedData.uiEffect); alDeleteAuxiliaryEffectSlots(1, &_playbackSpeedData.uiEffectSlot); _playbackSpeedData.uiFilter = 0; _playbackSpeedData.uiEffect = 0; _playbackSpeedData.uiEffectSlot = 0; #endif // TDESKTOP_DISABLE_OPENAL_EFFECTS if (Player::mixer()) { Player::mixer()->detachTracks(); } instance->detachTracks(); DestroyPlaybackDevice(); }