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20589f19e4
Until now, Mixer not only was responsible for rendering audio buffers but also managed writing them to audio backend (through a FIFO) and handled various quality related parameters. All this functionality has been moved into the new AudioOutputContext class. It glues together AudioBackend (formerly called AudioDevice), global quality settings and the Mixer. The AudioOutputContext class creates a FifoWriter which calls Mixer::renderNextBuffer() and writes the output into the BufferFifo of the AudioOutputContext it belongs to. The BufferFifo is read by the according AudioBackend which belongs to the AudioOutputContext as well. The AudioOutputContext also handles resampling in case the AudioBackend wants the buffers in a different samplerate. During this rewrite the Mixer class and the according source files have been renamed from "mixer" to "Mixer". This results in small changes all over LMMS' code base.
153 lines
3.4 KiB
C++
153 lines
3.4 KiB
C++
/*
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* AudioPortAudio.h - device-class that performs PCM-output via PortAudio
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*
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* Copyright (c) 2008 Csaba Hruska <csaba.hruska/at/gmail.com>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef _AUDIO_PORTAUDIO_H
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#define _AUDIO_PORTAUDIO_H
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#include <QtCore/QObject>
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#include "lmmsconfig.h"
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#include "ComboBoxModel.h"
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class AudioPortAudioSetupUtil : public QObject
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{
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Q_OBJECT
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public slots:
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void updateDevices();
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void updateChannels();
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public:
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ComboBoxModel m_backendModel;
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ComboBoxModel m_deviceModel;
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} ;
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#ifdef LMMS_HAVE_PORTAUDIO
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#include <portaudio.h>
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#include "AudioBackend.h"
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#if defined paNeverDropInput || defined paNonInterleaved
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# define PORTAUDIO_V19
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#else
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# define PORTAUDIO_V18
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#endif
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class comboBox;
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class lcdSpinBox;
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class AudioPortAudio : public AudioBackend
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{
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public:
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AudioPortAudio( bool & _success_ful, mixer * _mixer );
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virtual ~AudioPortAudio();
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inline static QString name()
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{
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return QT_TRANSLATE_NOOP( "setupWidget", "PortAudio" );
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}
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int process_callback( const float *_inputBuffer,
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float * _outputBuffer,
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unsigned long _framesPerBuffer );
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class setupWidget : public AudioBackend::setupWidget
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{
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public:
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setupWidget( QWidget * _parent );
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virtual ~setupWidget();
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virtual void saveSettings();
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private:
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comboBox * m_backend;
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comboBox * m_device;
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lcdSpinBox * m_channels;
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AudioPortAudioSetupUtil m_setupUtil;
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} ;
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private:
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virtual void startProcessing();
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virtual void stopProcessing();
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virtual void applyQualitySettings();
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#ifdef PORTAUDIO_V19
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static int _process_callback( const void *_inputBuffer, void * _outputBuffer,
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unsigned long _framesPerBuffer,
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const PaStreamCallbackTimeInfo * _timeInfo,
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PaStreamCallbackFlags _statusFlags,
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void *arg );
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#else
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#define paContinue 0
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#define paComplete 1
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#define Pa_GetDeviceCount Pa_CountDevices
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#define Pa_GetDefaultInputDevice Pa_GetDefaultInputDeviceID
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#define Pa_GetDefaultOutputDevice Pa_GetDefaultOutputDeviceID
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#define Pa_IsStreamActive Pa_StreamActive
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static int _process_callback( void * _inputBuffer, void * _outputBuffer,
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unsigned long _framesPerBuffer, PaTimestamp _outTime, void * _arg );
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typedef double PaTime;
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typedef PaDeviceID PaDeviceIndex;
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typedef struct PaStreamParameters
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{
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PaDeviceIndex device;
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int channelCount;
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PaSampleFormat sampleFormat;
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PaTime suggestedLatency;
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void *hostApiSpecificStreamInfo;
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} PaStreamParameters;
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#endif
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PaStream * m_paStream;
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PaStreamParameters m_outputParameters;
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PaStreamParameters m_inputParameters;
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bool m_wasPAInitError;
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sampleFrameA * m_outBuf;
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int m_outBufPos;
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int m_outBufSize;
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bool m_stopped;
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QSemaphore m_stopSemaphore;
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} ;
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#endif
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#endif
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