forked from bartvdbraak/blender
159 lines
3.4 KiB
C++
159 lines
3.4 KiB
C++
/*
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* $Id$
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*
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* ***** BEGIN LGPL LICENSE BLOCK *****
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*
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* Copyright 2009 Jörg Hermann Müller
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*
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* This file is part of AudaSpace.
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*
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* AudaSpace is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* AudaSpace 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
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with AudaSpace. If not, see <http://www.gnu.org/licenses/>.
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*
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* ***** END LGPL LICENSE BLOCK *****
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*/
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#ifndef AUD_JACKDEVICE
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#define AUD_JACKDEVICE
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#include "AUD_SoftwareDevice.h"
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#include "AUD_Buffer.h"
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#include <string>
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#include <jack.h>
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#include <ringbuffer.h>
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typedef void (*AUD_syncFunction)(void*, int, float);
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/**
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* This device plays back through Jack.
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*/
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class AUD_JackDevice : public AUD_SoftwareDevice
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{
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private:
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/**
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* The output ports of jack.
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*/
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jack_port_t** m_ports;
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/**
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* The jack client.
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*/
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jack_client_t* m_client;
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/**
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* The output buffer.
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*/
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AUD_Buffer m_buffer;
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/**
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* The deinterleaving buffer.
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*/
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AUD_Buffer m_deinterleavebuf;
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jack_ringbuffer_t** m_ringbuffers;
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/**
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* Whether the device is valid.
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*/
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bool m_valid;
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/**
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* Invalidates the jack device.
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* \param data The jack device that gets invalidet by jack.
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*/
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static void jack_shutdown(void *data);
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/**
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* Mixes the next bytes into the buffer.
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* \param length The length in samples to be filled.
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* \param data A pointer to the jack device.
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* \return 0 what shows success.
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*/
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static int jack_mix(jack_nframes_t length, void *data);
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static int jack_sync(jack_transport_state_t state, jack_position_t* pos, void* data);
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/**
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* Next Jack Transport state (-1 if not expected to change).
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*/
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jack_transport_state_t m_nextState;
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/**
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* Current jack transport status.
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*/
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jack_transport_state_t m_state;
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/**
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* Syncronisation state.
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*/
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int m_sync;
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/**
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* External syncronisation callback function.
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*/
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AUD_syncFunction m_syncFunc;
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/**
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* Data for the sync function.
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*/
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void* m_syncFuncData;
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/**
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* The mixing thread.
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*/
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pthread_t m_mixingThread;
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pthread_mutex_t m_mixingLock;
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pthread_cond_t m_mixingCondition;
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static void* runMixingThread(void* device);
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void updateRingBuffers();
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// hide copy constructor and operator=
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AUD_JackDevice(const AUD_JackDevice&);
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AUD_JackDevice& operator=(const AUD_JackDevice&);
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protected:
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virtual void playing(bool playing);
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public:
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/**
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* Creates a Jack client for audio output.
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* \param name The client name.
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* \param specs The wanted audio specification, where only the channel count
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* is important.
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* \param buffersize The size of the internal buffer.
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* \exception AUD_Exception Thrown if the audio device cannot be opened.
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*/
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AUD_JackDevice(std::string name, AUD_DeviceSpecs specs, int buffersize = AUD_DEFAULT_BUFFER_SIZE);
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/**
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* Closes the Jack client.
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*/
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virtual ~AUD_JackDevice();
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void startPlayback();
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void stopPlayback();
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void seekPlayback(float time);
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void setSyncCallback(AUD_syncFunction sync, void* data);
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float getPlaybackPosition();
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bool doesPlayback();
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};
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#endif //AUD_JACKDEVICE
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