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/*
* Internal interfaces for PortAudio Apple AUHAL implementation
*
* PortAudio Portable Real-Time Audio Library
* Latest Version at: http://www.portaudio.com
*
* Written by Bjorn Roche of XO Audio LLC, from PA skeleton code.
* Portions copied from code by Dominic Mazzoni (who wrote a HAL implementation)
*
* Dominic's code was based on code by Phil Burk, Darren Gibbs,
* Gord Peters, Stephane Letz, and Greg Pfiel.
*
* The following people also deserve acknowledgements:
*
* Olivier Tristan for feedback and testing
* Glenn Zelniker and Z-Systems engineering for sponsoring the Blocking I/O
* interface.
*
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* The text above constitutes the entire PortAudio license; however,
* the PortAudio community also makes the following non-binding requests:
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version. It is also
* requested that these non-binding requests be included along with the
* license above.
*/
/**
@file pa_mac_core
@ingroup hostapi_src
@author Bjorn Roche
@brief AUHAL implementation of PortAudio
*/
#ifndef PA_MAC_CORE_INTERNAL_H__
#define PA_MAC_CORE_INTERNAL_H__
#include <CoreAudio/CoreAudio.h>
#include <CoreServices/CoreServices.h>
#include <AudioUnit/AudioUnit.h>
#include <AudioToolbox/AudioToolbox.h>
#include "portaudio.h"
#include "pa_util.h"
#include "pa_hostapi.h"
#include "pa_stream.h"
#include "pa_allocation.h"
#include "pa_cpuload.h"
#include "pa_process.h"
#include "pa_ringbuffer.h"
#include "pa_mac_core_blocking.h"
/* function prototypes */
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
PaError PaMacCore_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#define RING_BUFFER_ADVANCE_DENOMINATOR (4)
PaError ReadStream( PaStream* stream, void *buffer, unsigned long frames );
PaError WriteStream( PaStream* stream, const void *buffer, unsigned long frames );
signed long GetStreamReadAvailable( PaStream* stream );
signed long GetStreamWriteAvailable( PaStream* stream );
/* PaMacAUHAL - host api datastructure specific to this implementation */
typedef struct
{
PaUtilHostApiRepresentation inheritedHostApiRep;
PaUtilStreamInterface callbackStreamInterface;
PaUtilStreamInterface blockingStreamInterface;
PaUtilAllocationGroup *allocations;
/* implementation specific data goes here */
long devCount;
AudioDeviceID *devIds; /*array of all audio devices*/
AudioDeviceID defaultIn;
AudioDeviceID defaultOut;
}
PaMacAUHAL;
typedef struct PaMacCoreDeviceProperties
{
/* Values in Frames from property queries. */
UInt32 safetyOffset;
UInt32 bufferFrameSize;
// UInt32 streamLatency; // Seems to be the same as deviceLatency!?
UInt32 deviceLatency;
/* Current device sample rate. May change!
These are initialized to the nominal device sample rate,
and updated with the actual sample rate, when/where available.
Note that these are the *device* sample rates, prior to any required
SR conversion. */
Float64 sampleRate;
Float64 samplePeriod; // reciprocal
}
PaMacCoreDeviceProperties;
/* stream data structure specifically for this implementation */
typedef struct PaMacCoreStream
{
PaUtilStreamRepresentation streamRepresentation;
PaUtilCpuLoadMeasurer cpuLoadMeasurer;
PaUtilBufferProcessor bufferProcessor;
/* implementation specific data goes here */
bool bufferProcessorIsInitialized;
AudioUnit inputUnit;
AudioUnit outputUnit;
AudioDeviceID inputDevice;
AudioDeviceID outputDevice;
size_t userInChan;
size_t userOutChan;
size_t inputFramesPerBuffer;
size_t outputFramesPerBuffer;
PaMacBlio blio;
/* We use this ring buffer when input and out devs are different. */
PaUtilRingBuffer inputRingBuffer;
/* We may need to do SR conversion on input. */
AudioConverterRef inputSRConverter;
/* We need to preallocate an inputBuffer for reading data. */
AudioBufferList inputAudioBufferList;
AudioTimeStamp startTime;
/* FIXME: instead of volatile, these should be properly memory barriered */
volatile uint32_t xrunFlags; /*PaStreamCallbackFlags*/
volatile enum {
STOPPED = 0, /* playback is completely stopped,
and the user has called StopStream(). */
CALLBACK_STOPPED = 1, /* callback has requested stop,
but user has not yet called StopStream(). */
STOPPING = 2, /* The stream is in the process of closing
because the user has called StopStream.
This state is just used internally;
externally it is indistinguishable from
ACTIVE.*/
ACTIVE = 3 /* The stream is active and running. */
} state;
double sampleRate;
PaMacCoreDeviceProperties inputProperties;
PaMacCoreDeviceProperties outputProperties;
/* data updated by main thread and notifications, protected by timingInformationMutex */
int timingInformationMutexIsInitialized;
pthread_mutex_t timingInformationMutex;
/* These are written by the PA thread or from CoreAudio callbacks. Protected by the mutex. */
Float64 timestampOffsetCombined;
Float64 timestampOffsetInputDevice;
Float64 timestampOffsetOutputDevice;
/* Offsets in seconds to be applied to Apple timestamps to convert them to PA timestamps.
* While the io proc is active, the following values are only accessed and manipulated by the ioproc */
Float64 timestampOffsetCombined_ioProcCopy;
Float64 timestampOffsetInputDevice_ioProcCopy;
Float64 timestampOffsetOutputDevice_ioProcCopy;
}
PaMacCoreStream;
#endif /* PA_MAC_CORE_INTERNAL_H__ */
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