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/*
* Internal blocking 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
@ingroup hostapi_src
*/
#ifndef PA_MAC_CORE_BLOCKING_H_
#define PA_MAC_CORE_BLOCKING_H_
#include "pa_ringbuffer.h"
#include "portaudio.h"
#include "pa_mac_core_utilities.h"
/*
* Number of milliseconds to busy wait while waiting for data in blocking calls.
*/
#define PA_MAC_BLIO_BUSY_WAIT_SLEEP_INTERVAL (5)
/*
* Define exactly one of these blocking methods
* PA_MAC_BLIO_MUTEX is not actively maintained.
*/
#define PA_MAC_BLIO_BUSY_WAIT
/*
#define PA_MAC_BLIO_MUTEX
*/
typedef struct {
PaUtilRingBuffer inputRingBuffer;
PaUtilRingBuffer outputRingBuffer;
ring_buffer_size_t ringBufferFrames;
PaSampleFormat inputSampleFormat;
size_t inputSampleSizeActual;
size_t inputSampleSizePow2;
PaSampleFormat outputSampleFormat;
size_t outputSampleSizeActual;
size_t outputSampleSizePow2;
int inChan;
int outChan;
//PaStreamCallbackFlags statusFlags;
uint32_t statusFlags;
PaError errors;
/* Here we handle blocking, using condition variables. */
#ifdef PA_MAC_BLIO_MUTEX
volatile bool isInputEmpty;
pthread_mutex_t inputMutex;
pthread_cond_t inputCond;
volatile bool isOutputFull;
pthread_mutex_t outputMutex;
pthread_cond_t outputCond;
#endif
}
PaMacBlio;
/*
* These functions operate on condition and related variables.
*/
PaError initializeBlioRingBuffers(
PaMacBlio *blio,
PaSampleFormat inputSampleFormat,
PaSampleFormat outputSampleFormat,
long ringBufferSizeInFrames,
int inChan,
int outChan );
PaError destroyBlioRingBuffers( PaMacBlio *blio );
PaError resetBlioRingBuffers( PaMacBlio *blio );
int BlioCallback(
const void *input, void *output,
unsigned long frameCount,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData );
PaError waitUntilBlioWriteBufferIsEmpty( PaMacBlio *blio, double sampleRate,
size_t framesPerBuffer );
#endif /*PA_MAC_CORE_BLOCKING_H_*/
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