1 files changed, 263 insertions, 0 deletions
diff --git a/sc4pd/headers/server/SC_CoreAudio.h b/sc4pd/headers/server/SC_CoreAudio.h
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+++ b/sc4pd/headers/server/SC_CoreAudio.h
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+/*
+	SuperCollider real time audio synthesis system
+    Copyright (c) 2002 James McCartney. All rights reserved.
+	http://www.audiosynth.com
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+
+#ifndef _SC_CoreAudio_
+#define _SC_CoreAudio_
+
+#include "MsgFifo.h"
+#include "SC_FifoMsg.h"
+#include "OSC_Packet.h"
+#include "SC_SyncCondition.h"
+#include "PriorityQueue.h"
+#include "SC_Lock.h"
+
+#define SC_AUDIO_API_COREAUDIO	1
+#define SC_AUDIO_API_JACK		2
+#define SC_AUDIO_API_PORTAUDIO  3
+
+#ifdef SC_WIN32
+# define SC_AUDIO_API SC_AUDIO_API_PORTAUDIO
+#endif
+
+#ifndef SC_AUDIO_API
+# define SC_AUDIO_API SC_AUDIO_API_COREAUDIO
+#endif // SC_AUDIO_API
+
+#if SC_AUDIO_API == SC_AUDIO_API_COREAUDIO
+# include <CoreAudio/AudioHardware.h>
+# include <CoreAudio/HostTime.h>
+#endif
+
+#if SC_AUDIO_API == SC_AUDIO_API_JACK
+# include <jack/jack.h>
+class SC_JackPortList;
+#endif
+
+#if SC_AUDIO_API == SC_AUDIO_API_PORTAUDIO
+#include "portaudio.h"
+#endif
+
+
+struct SC_ScheduledEvent 
+{
+	SC_ScheduledEvent() : mTime(0), mPacket(0) {}
+	SC_ScheduledEvent(struct World *inWorld, int64 inTime, OSC_Packet *inPacket) 
+		: mTime(inTime), mPacket(inPacket), mWorld(inWorld) {}
+	
+	int64 Time() { return mTime; }
+	void Perform();
+	
+	int64 mTime;
+	OSC_Packet *mPacket;
+	struct World *mWorld;
+};
+
+typedef MsgFifo<FifoMsg, 1024> EngineFifo;
+
+
+class SC_AudioDriver
+{
+protected:
+    int64 mOSCincrement;
+	struct World *mWorld;
+	double mOSCtoSamples;
+	int mSampleTime;
+
+	// Common members
+	uint32	mHardwareBufferSize;	// bufferSize returned by kAudioDevicePropertyBufferSize
+	EngineFifo mFromEngine, mToEngine;
+	SC_SyncCondition mAudioSync;
+	pthread_t mThread;
+	bool mRunThreadFlag;
+	uint32 mSafetyOffset;
+	PriorityQueueT<SC_ScheduledEvent, 2048> mScheduler;
+	SC_Lock *mProcessPacketLock;
+	int mNumSamplesPerCallback;
+	uint32 mPreferredHardwareBufferFrameSize;
+	uint32 mPreferredSampleRate;
+	double mBuffersPerSecond;
+	double mAvgCPU, mPeakCPU;
+	int mPeakCounter, mMaxPeakCounter;
+	double mOSCincrementNumerator;
+	
+	double mStartHostSecs;
+	double mPrevHostSecs;
+	double mStartSampleTime;
+	double mPrevSampleTime;
+	double mSmoothSampleRate;
+	double mSampleRate;
+
+    // Driver interface methods, implemented by subclasses
+	virtual bool DriverSetup(int* outNumSamplesPerCallback, double* outSampleRate) = 0;
+	virtual bool DriverStart() = 0;
+	virtual bool DriverStop() = 0;
+    
+public:
+	// Common methods
+	SC_AudioDriver(struct World *inWorld);
+	virtual ~SC_AudioDriver();
+
+    int64 mOSCbuftime;
+    
+	bool Setup();
+	bool Start();
+	bool Stop();
+	
+	void ClearSched() { mScheduler.Empty(); }
+
+	void Lock() { mProcessPacketLock->Lock(); }
+	void Unlock() { mProcessPacketLock->Unlock(); }
+	
+	void RunNonRealTime(float *in, float *out, int numSamples, int64 oscTime);
+	void* RunThread();
+
+	int SafetyOffset() const { return mSafetyOffset; }
+	int NumSamplesPerCallback() const { return mNumSamplesPerCallback; }
+	void SetPreferredHardwareBufferFrameSize(int inSize) 
+	{ 
+		mPreferredHardwareBufferFrameSize = inSize;
+	}
+	void SetPreferredSampleRate(int inRate)
+	{
+		mPreferredSampleRate = inRate;
+	}
+
+	bool SendMsgToEngine(FifoMsg& inMsg);
+	bool SendMsgFromEngine(FifoMsg& inMsg);
+	
+	void AddEvent(SC_ScheduledEvent& event) { mScheduler.Add(event); }
+
+	double GetAvgCPU() const { return mAvgCPU; }
+	double GetPeakCPU() const { return mPeakCPU; }
+	double GetSampleRate() const { return mSampleRate; }
+	double GetActualSampleRate() const { return mSmoothSampleRate; }	
+};
+
+
+// the following classes should be split out into separate source files.
+#if SC_AUDIO_API == SC_AUDIO_API_COREAUDIO
+class SC_CoreAudioDriver : public SC_AudioDriver
+{
+
+    AudioBufferList * mInputBufList;
+	AudioDeviceID	mInputDevice;
+	AudioDeviceID	mOutputDevice;
+
+	AudioStreamBasicDescription	inputStreamDesc;	// info about the default device
+	AudioStreamBasicDescription	outputStreamDesc;	// info about the default device
+
+	friend OSStatus appIOProc (		AudioDeviceID inDevice, 
+									const AudioTimeStamp* inNow, 
+									const AudioBufferList* inInputData,
+									const AudioTimeStamp* inInputTime, 
+									AudioBufferList* outOutputData, 
+									const AudioTimeStamp* inOutputTime,
+									void* defptr);
+
+protected:
+    // Driver interface methods
+	virtual bool DriverSetup(int* outNumSamplesPerCallback, double* outSampleRate);
+	virtual bool DriverStart();
+	virtual bool DriverStop();
+    
+public:
+    SC_CoreAudioDriver(struct World *inWorld);
+	virtual ~SC_CoreAudioDriver();
+
+    void Run(const AudioBufferList* inInputData, AudioBufferList* outOutputData, int64 oscTime);
+
+	bool UseInput() { return mInputDevice != kAudioDeviceUnknown; }
+	bool UseSeparateIO() { return UseInput() && mInputDevice != mOutputDevice; }
+	AudioDeviceID InputDevice() { return mInputDevice; }
+	AudioDeviceID OutputDevice() { return mOutputDevice; }
+	
+	void SetInputBufferList(AudioBufferList * inBufList) { mInputBufList = inBufList; }
+	AudioBufferList* GetInputBufferList() const { return mInputBufList; }	
+};
+
+inline SC_AudioDriver* SC_NewAudioDriver(struct World *inWorld)
+{
+    return new SC_CoreAudioDriver(inWorld);
+}
+#endif // SC_AUDIO_API_COREAUDIO
+
+
+#if SC_AUDIO_API == SC_AUDIO_API_JACK
+class SC_JackDriver : public SC_AudioDriver
+{
+    jack_client_t		*mClient;
+	SC_JackPortList		*mInputList;
+	SC_JackPortList		*mOutputList;
+	int64				mMaxOutputLatency;
+
+protected:
+    // Driver interface methods
+	virtual bool DriverSetup(int* outNumSamplesPerCallback, double* outSampleRate);
+	virtual bool DriverStart();
+	virtual bool DriverStop();
+    
+public:
+    SC_JackDriver(struct World *inWorld);
+	virtual ~SC_JackDriver();
+
+    void Run();
+	void BufferSizeChanged(int numSamples);
+	void SampleRateChanged(double sampleRate);
+	void GraphOrderChanged();
+};
+
+inline SC_AudioDriver* SC_NewAudioDriver(struct World *inWorld)
+{
+    return new SC_JackDriver(inWorld);
+}
+#endif // SC_AUDIO_API_JACK
+
+
+#if SC_AUDIO_API == SC_AUDIO_API_PORTAUDIO
+class SC_PortAudioDriver : public SC_AudioDriver
+{
+
+    int mInputChannelCount, mOutputChannelCount;
+    PaStream *mStream;
+
+protected:
+    // Driver interface methods
+	virtual bool DriverSetup(int* outNumSamplesPerCallback, double* outSampleRate);
+	virtual bool DriverStart();
+	virtual bool DriverStop();
+    
+public:
+    SC_PortAudioDriver(struct World *inWorld);
+	virtual ~SC_PortAudioDriver();
+
+    int PortAudioCallback( const void *input, void *output,
+            unsigned long frameCount, const PaStreamCallbackTimeInfo* timeInfo,
+            PaStreamCallbackFlags statusFlags );
+};
+
+inline SC_AudioDriver* SC_NewAudioDriver(struct World *inWorld)
+{
+    return new SC_PortAudioDriver(inWorld);
+}
+#endif // SC_AUDIO_API_PORTAUDIO
+
+
+#endif