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src/mod/endpoints/mod_portaudio/pablio.c
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/*
* $Id: pablio.c,v 1.1.1.1.4.4 2003/03/13 17:28:33 philburk Exp $
* pablio.c
* Portable Audio Blocking Input/Output utility.
*
* Author: Phil Burk, http://www.softsynth.com
*
* This program uses the PortAudio Portable Audio Library.
* For more information see: http://www.audiomulch.com/portaudio/
* Copyright (c) 1999-2000 Ross Bencina and 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.
*
* 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.
*
* 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.
*
*/
/* History:
* PLB021214 - check for valid stream in CloseAudioStream() to prevent hang.
* add timeOutMSec to CloseAudioStream() to prevent hang.
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "portaudio.h"
#include "ringbuffer.h"
#include "pablio.h"
#include <string.h>
/************************************************************************/
/******** Constants *****************************************************/
/************************************************************************/
#define FRAMES_PER_BUFFER (256)
/************************************************************************/
/******** Prototypes ****************************************************/
/************************************************************************/
static int blockingIOCallback(void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer,
PaTimestamp outTime, void *userData);
static PaError PABLIO_InitFIFO(RingBuffer * rbuf, long numFrames, long bytesPerFrame);
static PaError PABLIO_TermFIFO(RingBuffer * rbuf);
/************************************************************************/
/******** Functions *****************************************************/
/************************************************************************/
/* Called from PortAudio.
* Read and write data only if there is room in FIFOs.
*/
static int blockingIOCallback(void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer,
PaTimestamp outTime, void *userData)
/*
* $Id: pablio.c,v 1.1.1.1.4.4 2003/03/13 17:28:33 philburk Exp $
* pablio.c
* Portable Audio Blocking Input/Output utility.
*
* Author: Phil Burk, http://www.softsynth.com
*
* This program uses the PortAudio Portable Audio Library.
* For more information see: http://www.audiomulch.com/portaudio/
* Copyright (c) 1999-2000 Ross Bencina and 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.
*
* 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.
*
* 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.
*
*/
/* History:
* PLB021214 - check for valid stream in CloseAudioStream() to prevent hang.
* add timeOutMSec to CloseAudioStream() to prevent hang.
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "portaudio.h"
#include "ringbuffer.h"
#include "pablio.h"
#include <string.h>
/************************************************************************/
/******** Constants *****************************************************/
/************************************************************************/
#define FRAMES_PER_BUFFER (256)
/************************************************************************/
/******** Prototypes ****************************************************/
/************************************************************************/
static int blockingIOCallback(void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer,
PaTimestamp outTime, void *userData);
static PaError PABLIO_InitFIFO(RingBuffer * rbuf, long numFrames, long bytesPerFrame);
static PaError PABLIO_TermFIFO(RingBuffer * rbuf);
/************************************************************************/
/******** Functions *****************************************************/
/************************************************************************/
/* Called from PortAudio.
* Read and write data only if there is room in FIFOs.
*/
static int blockingIOCallback(void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer,
PaTimestamp outTime, void *userData)
{
PABLIO_Stream * data = (PABLIO_Stream *) userData;
long numBytes = data->bytesPerFrame * framesPerBuffer;
(void) outTime;
/* This may get called with NULL inputBuffer during initial setup. */
PABLIO_Stream * data = (PABLIO_Stream *) userData;
long numBytes = data->bytesPerFrame * framesPerBuffer;
(void) outTime;
/* This may get called with NULL inputBuffer during initial setup. */
if (inputBuffer != NULL)
{
RingBuffer_Write(&data->inFIFO, inputBuffer, numBytes);
}
if (outputBuffer != NULL)
{
int i;
int numRead = RingBuffer_Read(&data->outFIFO, outputBuffer, numBytes);
/* Zero out remainder of buffer if we run out of data. */
{
RingBuffer_Write(&data->inFIFO, inputBuffer, numBytes);
}
if (outputBuffer != NULL)
{
int i;
int numRead = RingBuffer_Read(&data->outFIFO, outputBuffer, numBytes);
/* Zero out remainder of buffer if we run out of data. */
for (i = numRead; i < numBytes; i++)
{
((char *) outputBuffer)[i] = 0;
} }
return 0;
}
{
((char *) outputBuffer)[i] = 0;
} }
return 0;
}
/* Allocate buffer. */
static PaError PABLIO_InitFIFO(RingBuffer * rbuf, long numFrames, long bytesPerFrame)
/* Allocate buffer. */
static PaError PABLIO_InitFIFO(RingBuffer * rbuf, long numFrames, long bytesPerFrame)
{
long numBytes = numFrames * bytesPerFrame;
char *buffer = (char *) malloc(numBytes);
if (buffer == NULL)
long numBytes = numFrames * bytesPerFrame;
char *buffer = (char *) malloc(numBytes);
if (buffer == NULL)
return paInsufficientMemory;
memset(buffer, 0, numBytes);
return (PaError) RingBuffer_Init(rbuf, numBytes, buffer);
}
memset(buffer, 0, numBytes);
return (PaError) RingBuffer_Init(rbuf, numBytes, buffer);
}
/* Free buffer. */
static PaError PABLIO_TermFIFO(RingBuffer * rbuf)
/* Free buffer. */
static PaError PABLIO_TermFIFO(RingBuffer * rbuf)
{
if (rbuf->buffer)
if (rbuf->buffer)
free(rbuf->buffer);
rbuf->buffer = NULL;
return paNoError;
}
rbuf->buffer = NULL;
return paNoError;
}
/************************************************************
* Write data to ring buffer.
* Will not return until all the data has been written.
*/
long WriteAudioStream(PABLIO_Stream * aStream, void *data, long numFrames)
/************************************************************
* Write data to ring buffer.
* Will not return until all the data has been written.
*/
long WriteAudioStream(PABLIO_Stream * aStream, void *data, long numFrames)
{
long bytesWritten;
char *p = (char *) data;
long numBytes = aStream->bytesPerFrame * numFrames;
while (numBytes > 0)
{
bytesWritten = RingBuffer_Write(&aStream->outFIFO, p, numBytes);
numBytes -= bytesWritten;
p += bytesWritten;
if (numBytes > 0)
long bytesWritten;
char *p = (char *) data;
long numBytes = aStream->bytesPerFrame * numFrames;
while (numBytes > 0)
{
bytesWritten = RingBuffer_Write(&aStream->outFIFO, p, numBytes);
numBytes -= bytesWritten;
p += bytesWritten;
if (numBytes > 0)
Pa_Sleep(10);
}
return numFrames;
}
}
return numFrames;
}
/************************************************************
* Read data from ring buffer.
* Will not return until all the data has been read.
*/
long ReadAudioStream(PABLIO_Stream * aStream, void *data, long numFrames)
/************************************************************
* Read data from ring buffer.
* Will not return until all the data has been read.
*/
long ReadAudioStream(PABLIO_Stream * aStream, void *data, long numFrames)
{
long bytesRead;
char *p = (char *) data;
long numBytes = aStream->bytesPerFrame * numFrames;
while (numBytes > 0)
{
bytesRead = RingBuffer_Read(&aStream->inFIFO, p, numBytes);
numBytes -= bytesRead;
p += bytesRead;
if (numBytes > 0)
long bytesRead;
char *p = (char *) data;
long numBytes = aStream->bytesPerFrame * numFrames;
while (numBytes > 0)
{
bytesRead = RingBuffer_Read(&aStream->inFIFO, p, numBytes);
numBytes -= bytesRead;
p += bytesRead;
if (numBytes > 0)
Pa_Sleep(10);
}
return numFrames;
}
}
return numFrames;
}
/************************************************************
* Return the number of frames that could be written to the stream without
* having to wait.
*/
long GetAudioStreamWriteable(PABLIO_Stream * aStream)
/************************************************************
* Return the number of frames that could be written to the stream without
* having to wait.
*/
long GetAudioStreamWriteable(PABLIO_Stream * aStream)
{
int bytesEmpty = RingBuffer_GetWriteAvailable(&aStream->outFIFO);
return bytesEmpty / aStream->bytesPerFrame;
}
int bytesEmpty = RingBuffer_GetWriteAvailable(&aStream->outFIFO);
return bytesEmpty / aStream->bytesPerFrame;
}
/************************************************************
* Return the number of frames that are available to be read from the
* stream without having to wait.
*/
long GetAudioStreamReadable(PABLIO_Stream * aStream)
/************************************************************
* Return the number of frames that are available to be read from the
* stream without having to wait.
*/
long GetAudioStreamReadable(PABLIO_Stream * aStream)
{
int bytesFull = RingBuffer_GetReadAvailable(&aStream->inFIFO);
return bytesFull / aStream->bytesPerFrame;
}
int bytesFull = RingBuffer_GetReadAvailable(&aStream->inFIFO);
return bytesFull / aStream->bytesPerFrame;
}
/************************************************************/
static unsigned long RoundUpToNextPowerOf2(unsigned long n)
/************************************************************/
static unsigned long RoundUpToNextPowerOf2(unsigned long n)
{
long numBits = 0;
if (((n - 1) & n) == 0)
long numBits = 0;
if (((n - 1) & n) == 0)
return n; /* Already Power of two. */
while (n > 0)
{
n = n >> 1;
numBits++;
}
return (1 << numBits);
}
while (n > 0)
{
n = n >> 1;
numBits++;
}
return (1 << numBits);
}
/************************************************************
* Opens a PortAudio stream with default characteristics.
* Allocates PABLIO_Stream structure.
*
* flags parameter can be an ORed combination of:
* PABLIO_READ, PABLIO_WRITE, or PABLIO_READ_WRITE,
* and either PABLIO_MONO or PABLIO_STEREO
*/
PaError OpenAudioStream(PABLIO_Stream ** rwblPtr, double sampleRate, PaSampleFormat format, long flags, int indev,
int outdev)
/************************************************************
* Opens a PortAudio stream with default characteristics.
* Allocates PABLIO_Stream structure.
*
* flags parameter can be an ORed combination of:
* PABLIO_READ, PABLIO_WRITE, or PABLIO_READ_WRITE,
* and either PABLIO_MONO or PABLIO_STEREO
*/
PaError OpenAudioStream(PABLIO_Stream ** rwblPtr, double sampleRate, PaSampleFormat format, long flags, int indev,
int outdev)
{
long bytesPerSample;
long doRead = 0;
long doWrite = 0;
PaError err;
PABLIO_Stream * aStream;
long minNumBuffers;
long numFrames;
/* Allocate PABLIO_Stream structure for caller. */
long bytesPerSample;
long doRead = 0;
long doWrite = 0;
PaError err;
PABLIO_Stream * aStream;
long minNumBuffers;
long numFrames;
/* Allocate PABLIO_Stream structure for caller. */
aStream = (PABLIO_Stream *) malloc(sizeof(PABLIO_Stream));
if (aStream == NULL)
if (aStream == NULL)
return paInsufficientMemory;
memset(aStream, 0, sizeof(PABLIO_Stream));
/* Determine size of a sample. */
memset(aStream, 0, sizeof(PABLIO_Stream));
/* Determine size of a sample. */
bytesPerSample = Pa_GetSampleSize(format);
if (bytesPerSample < 0)
{
err = (PaError) bytesPerSample;
goto error;
}
aStream->samplesPerFrame = ((flags & PABLIO_MONO) != 0) ? 1 : 2;
aStream->bytesPerFrame = bytesPerSample * aStream->samplesPerFrame;
/* Initialize PortAudio */
if (bytesPerSample < 0)
{
err = (PaError) bytesPerSample;
goto error;
}
aStream->samplesPerFrame = ((flags & PABLIO_MONO) != 0) ? 1 : 2;
aStream->bytesPerFrame = bytesPerSample * aStream->samplesPerFrame;
/* Initialize PortAudio */
err = Pa_Initialize();
if (err != paNoError)
if (err != paNoError)
goto error;
/* Warning: numFrames must be larger than amount of data processed per interrupt
* inside PA to prevent glitches. Just to be safe, adjust size upwards.
*/
/* Warning: numFrames must be larger than amount of data processed per interrupt
* inside PA to prevent glitches. Just to be safe, adjust size upwards.
*/
minNumBuffers = 2 * Pa_GetMinNumBuffers(FRAMES_PER_BUFFER, sampleRate);
numFrames = minNumBuffers * FRAMES_PER_BUFFER;
/* The PortAudio callback runs in a high priority thread. But PABLIO
* runs in a normal foreground thread. So we may have much worse
* latency in PABLIO. So adjust latency to a safe level.
*/
numFrames = minNumBuffers * FRAMES_PER_BUFFER;
/* The PortAudio callback runs in a high priority thread. But PABLIO
* runs in a normal foreground thread. So we may have much worse
* latency in PABLIO. So adjust latency to a safe level.
*/
{
const int safeLatencyMSec = 200;
int minLatencyMSec = (int) ((1000 * numFrames) / sampleRate);
if (minLatencyMSec < safeLatencyMSec)
{
numFrames = (int) ((safeLatencyMSec * sampleRate) / 1000);
}
} numFrames = RoundUpToNextPowerOf2(numFrames);
/* Initialize Ring Buffers */
const int safeLatencyMSec = 200;
int minLatencyMSec = (int) ((1000 * numFrames) / sampleRate);
if (minLatencyMSec < safeLatencyMSec)
{
numFrames = (int) ((safeLatencyMSec * sampleRate) / 1000);
}
} numFrames = RoundUpToNextPowerOf2(numFrames);
/* Initialize Ring Buffers */
doRead = ((flags & PABLIO_READ) != 0);
doWrite = ((flags & PABLIO_WRITE) != 0);
if (doRead)
{
err = PABLIO_InitFIFO(&aStream->inFIFO, numFrames, aStream->bytesPerFrame);
if (err != paNoError)
doWrite = ((flags & PABLIO_WRITE) != 0);
if (doRead)
{
err = PABLIO_InitFIFO(&aStream->inFIFO, numFrames, aStream->bytesPerFrame);
if (err != paNoError)
goto error;
}
if (doWrite)
{
long numBytes;
err = PABLIO_InitFIFO(&aStream->outFIFO, numFrames, aStream->bytesPerFrame);
if (err != paNoError)
}
if (doWrite)
{
long numBytes;
err = PABLIO_InitFIFO(&aStream->outFIFO, numFrames, aStream->bytesPerFrame);
if (err != paNoError)
goto error;
/* Make Write FIFO appear full initially. */
/* Make Write FIFO appear full initially. */
numBytes = RingBuffer_GetWriteAvailable(&aStream->outFIFO);
RingBuffer_AdvanceWriteIndex(&aStream->outFIFO, numBytes);
}
/* Open a PortAudio stream that we will use to communicate with the underlying
* audio drivers. */
err = Pa_OpenStream(&aStream->stream,
(doRead ? (indev > -1) ? indev : Pa_GetDefaultInputDeviceID() : paNoDevice),
(doRead ? aStream->samplesPerFrame : 0), format, NULL,
(doWrite ? (outdev > -1) ? outdev : Pa_GetDefaultOutputDeviceID() : paNoDevice),
(doWrite ? aStream->samplesPerFrame : 0), format, NULL, sampleRate, FRAMES_PER_BUFFER,
minNumBuffers, paClipOff,
/* we won't output out of range samples so don't bother clipping them */
blockingIOCallback, aStream);
if (err != paNoError)
RingBuffer_AdvanceWriteIndex(&aStream->outFIFO, numBytes);
}
/* Open a PortAudio stream that we will use to communicate with the underlying
* audio drivers. */
err = Pa_OpenStream(&aStream->stream,
(doRead ? (indev > -1) ? indev : Pa_GetDefaultInputDeviceID() : paNoDevice),
(doRead ? aStream->samplesPerFrame : 0), format, NULL,
(doWrite ? (outdev > -1) ? outdev : Pa_GetDefaultOutputDeviceID() : paNoDevice),
(doWrite ? aStream->samplesPerFrame : 0), format, NULL, sampleRate, FRAMES_PER_BUFFER,
minNumBuffers, paClipOff,
/* we won't output out of range samples so don't bother clipping them */
blockingIOCallback, aStream);
if (err != paNoError)
goto error;
err = Pa_StartStream(aStream->stream);
if (err != paNoError)
err = Pa_StartStream(aStream->stream);
if (err != paNoError)
goto error;
*rwblPtr = aStream;
return paNoError;
error:CloseAudioStream(aStream);
*rwblPtr = NULL;
return err;
}
*rwblPtr = aStream;
return paNoError;
error:CloseAudioStream(aStream);
*rwblPtr = NULL;
return err;
}
/************************************************************/
PaError CloseAudioStream(PABLIO_Stream * aStream)
/************************************************************/
PaError CloseAudioStream(PABLIO_Stream * aStream)
{
PaError err = paNoError;
int bytesEmpty;
int byteSize = aStream->outFIFO.bufferSize;
if (aStream->stream != NULL) /* Make sure stream was opened. PLB021214 */
{
/* If we are writing data, make sure we play everything written. */
PaError err = paNoError;
int bytesEmpty;
int byteSize = aStream->outFIFO.bufferSize;
if (aStream->stream != NULL) /* Make sure stream was opened. PLB021214 */
{
/* If we are writing data, make sure we play everything written. */
if (byteSize > 0)
{
int timeOutMSec = 2000;
bytesEmpty = RingBuffer_GetWriteAvailable(&aStream->outFIFO);
while ((bytesEmpty < byteSize) && (timeOutMSec > 0))
{
Pa_Sleep(20);
timeOutMSec -= 20;
bytesEmpty = RingBuffer_GetWriteAvailable(&aStream->outFIFO);
}
}
err = Pa_StopStream(aStream->stream);
if (err != paNoError)
{
int timeOutMSec = 2000;
bytesEmpty = RingBuffer_GetWriteAvailable(&aStream->outFIFO);
while ((bytesEmpty < byteSize) && (timeOutMSec > 0))
{
Pa_Sleep(20);
timeOutMSec -= 20;
bytesEmpty = RingBuffer_GetWriteAvailable(&aStream->outFIFO);
}
}
err = Pa_StopStream(aStream->stream);
if (err != paNoError)
goto error;
err = Pa_CloseStream(aStream->stream);
}
error:Pa_Terminate();
PABLIO_TermFIFO(&aStream->inFIFO);
PABLIO_TermFIFO(&aStream->outFIFO);
free(aStream);
return err;
}
err = Pa_CloseStream(aStream->stream);
}
error:Pa_Terminate();
PABLIO_TermFIFO(&aStream->inFIFO);
PABLIO_TermFIFO(&aStream->outFIFO);
free(aStream);
return err;
}
src/mod/endpoints/mod_portaudio/pablio.h
浏览文件 @ df1f3209
#ifndef _PABLIO_H
#define _PABLIO_H
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/*
* $Id: pablio.h,v 1.1.1.1 2002/01/22 00:52:53 phil Exp $
* PABLIO.h
* Portable Audio Blocking read/write utility.
*
* Author: Phil Burk, http://www.softsynth.com/portaudio/
*
* Include file for PABLIO, the Portable Audio Blocking I/O Library.
* PABLIO is built on top of PortAudio, the Portable Audio Library.
* For more information see: http://www.audiomulch.com/portaudio/
* Copyright (c) 1999-2000 Ross Bencina and 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.
*
* 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.
*
* 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.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "portaudio.h"
#include "ringbuffer.h"
#include <string.h>
typedef struct
{
RingBuffer inFIFO;
RingBuffer outFIFO;
PortAudioStream *stream;
int bytesPerFrame;
int samplesPerFrame;
}
PABLIO_Stream;
/* Values for flags for OpenAudioStream(). */
#define PABLIO_READ (1<<0)
#define PABLIO_WRITE (1<<1)
#define PABLIO_READ_WRITE (PABLIO_READ|PABLIO_WRITE)
#define PABLIO_MONO (1<<2)
#define PABLIO_STEREO (1<<3)
/************************************************************
* Write data to ring buffer.
* Will not return until all the data has been written.
*/
long WriteAudioStream( PABLIO_Stream *aStream, void *data, long numFrames );
/************************************************************
* Read data from ring buffer.
* Will not return until all the data has been read.
*/
long ReadAudioStream( PABLIO_Stream *aStream, void *data, long numFrames );
/************************************************************
* Return the number of frames that could be written to the stream without
* having to wait.
*/
long GetAudioStreamWriteable( PABLIO_Stream *aStream );
/************************************************************
* Return the number of frames that are available to be read from the
* stream without having to wait.
*/
long GetAudioStreamReadable( PABLIO_Stream *aStream );
/************************************************************
* Opens a PortAudio stream with default characteristics.
* Allocates PABLIO_Stream structure.
*
* flags parameter can be an ORed combination of:
* PABLIO_READ, PABLIO_WRITE, or PABLIO_READ_WRITE,
* and either PABLIO_MONO or PABLIO_STEREO
*/
PaError OpenAudioStream( PABLIO_Stream **aStreamPtr, double sampleRate,
PaSampleFormat format, long flags, int indev, int outdev );
PaError CloseAudioStream( PABLIO_Stream *aStream );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _PABLIO_H */
#ifndef _PABLIO_H
#define _PABLIO_H
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/*
* $Id: pablio.h,v 1.1.1.1 2002/01/22 00:52:53 phil Exp $
* PABLIO.h
* Portable Audio Blocking read/write utility.
*
* Author: Phil Burk, http://www.softsynth.com/portaudio/
*
* Include file for PABLIO, the Portable Audio Blocking I/O Library.
* PABLIO is built on top of PortAudio, the Portable Audio Library.
* For more information see: http://www.audiomulch.com/portaudio/
* Copyright (c) 1999-2000 Ross Bencina and 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.
*
* 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.
*
* 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.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "portaudio.h"
#include "ringbuffer.h"
#include <string.h>
typedef struct
{
RingBuffer inFIFO;
RingBuffer outFIFO;
PortAudioStream *stream;
int bytesPerFrame;
int samplesPerFrame;
}
PABLIO_Stream;
/* Values for flags for OpenAudioStream(). */
#define PABLIO_READ (1<<0)
#define PABLIO_WRITE (1<<1)
#define PABLIO_READ_WRITE (PABLIO_READ|PABLIO_WRITE)
#define PABLIO_MONO (1<<2)
#define PABLIO_STEREO (1<<3)
/************************************************************
* Write data to ring buffer.
* Will not return until all the data has been written.
*/
long WriteAudioStream( PABLIO_Stream *aStream, void *data, long numFrames );
/************************************************************
* Read data from ring buffer.
* Will not return until all the data has been read.
*/
long ReadAudioStream( PABLIO_Stream *aStream, void *data, long numFrames );
/************************************************************
* Return the number of frames that could be written to the stream without
* having to wait.
*/
long GetAudioStreamWriteable( PABLIO_Stream *aStream );
/************************************************************
* Return the number of frames that are available to be read from the
* stream without having to wait.
*/
long GetAudioStreamReadable( PABLIO_Stream *aStream );
/************************************************************
* Opens a PortAudio stream with default characteristics.
* Allocates PABLIO_Stream structure.
*
* flags parameter can be an ORed combination of:
* PABLIO_READ, PABLIO_WRITE, or PABLIO_READ_WRITE,
* and either PABLIO_MONO or PABLIO_STEREO
*/
PaError OpenAudioStream( PABLIO_Stream **aStreamPtr, double sampleRate,
PaSampleFormat format, long flags, int indev, int outdev );
PaError CloseAudioStream( PABLIO_Stream *aStream );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _PABLIO_H */
src/mod/endpoints/mod_portaudio/ringbuffer.c
浏览文件 @ df1f3209
/*
* $Id: ringbuffer.c,v 1.1.1.1 2002/01/22 00:52:53 phil Exp $
* ringbuffer.c
* Ring Buffer utility..
*
* Author: Phil Burk, http://www.softsynth.com
*
* This program uses the PortAudio Portable Audio Library.
* For more information see: http://www.audiomulch.com/portaudio/
* Copyright (c) 1999-2000 Ross Bencina and 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.
*
* 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.
*
* 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.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "ringbuffer.h"
#include <string.h>
/***************************************************************************
* Initialize FIFO.
* numBytes must be power of 2, returns -1 if not.
*/
long RingBuffer_Init(RingBuffer * rbuf, long numBytes, void *dataPtr)
/*
* $Id: ringbuffer.c,v 1.1.1.1 2002/01/22 00:52:53 phil Exp $
* ringbuffer.c
* Ring Buffer utility..
*
* Author: Phil Burk, http://www.softsynth.com
*
* This program uses the PortAudio Portable Audio Library.
* For more information see: http://www.audiomulch.com/portaudio/
* Copyright (c) 1999-2000 Ross Bencina and 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.
*
* 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.
*
* 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.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "ringbuffer.h"
#include <string.h>
/***************************************************************************
* Initialize FIFO.
* numBytes must be power of 2, returns -1 if not.
*/
long RingBuffer_Init(RingBuffer * rbuf, long numBytes, void *dataPtr)
{
if (((numBytes - 1) & numBytes) != 0)
if (((numBytes - 1) & numBytes) != 0)
return -1; /* Not Power of two. */
rbuf->bufferSize = numBytes;
rbuf->buffer = (char *) dataPtr;
RingBuffer_Flush(rbuf);
rbuf->bigMask = (numBytes * 2) - 1;
rbuf->smallMask = (numBytes) - 1;
return 0;
}
/***************************************************************************
** Return number of bytes available for reading. */
long RingBuffer_GetReadAvailable(RingBuffer * rbuf)
rbuf->bufferSize = numBytes;
rbuf->buffer = (char *) dataPtr;
RingBuffer_Flush(rbuf);
rbuf->bigMask = (numBytes * 2) - 1;
rbuf->smallMask = (numBytes) - 1;
return 0;
}
/***************************************************************************
** Return number of bytes available for reading. */
long RingBuffer_GetReadAvailable(RingBuffer * rbuf)
{
return ((rbuf->writeIndex - rbuf->readIndex) & rbuf->bigMask);
}
return ((rbuf->writeIndex - rbuf->readIndex) & rbuf->bigMask);
}
/***************************************************************************
** Return number of bytes available for writing. */
long RingBuffer_GetWriteAvailable(RingBuffer * rbuf)
/***************************************************************************
** Return number of bytes available for writing. */
long RingBuffer_GetWriteAvailable(RingBuffer * rbuf)
{
return (rbuf->bufferSize - RingBuffer_GetReadAvailable(rbuf));
}
return (rbuf->bufferSize - RingBuffer_GetReadAvailable(rbuf));
}
/***************************************************************************
** Clear buffer. Should only be called when buffer is NOT being read. */
void RingBuffer_Flush(RingBuffer * rbuf)
/***************************************************************************
** Clear buffer. Should only be called when buffer is NOT being read. */
void RingBuffer_Flush(RingBuffer * rbuf)
{
rbuf->writeIndex = rbuf->readIndex = 0;
}
/***************************************************************************
** Get address of region(s) to which we can write data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be written or numBytes, whichever is smaller.
*/
long RingBuffer_GetWriteRegions(RingBuffer * rbuf, long numBytes, void **dataPtr1, long *sizePtr1, void **dataPtr2,
long *sizePtr2)
rbuf->writeIndex = rbuf->readIndex = 0;
}
/***************************************************************************
** Get address of region(s) to which we can write data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be written or numBytes, whichever is smaller.
*/
long RingBuffer_GetWriteRegions(RingBuffer * rbuf, long numBytes, void **dataPtr1, long *sizePtr1, void **dataPtr2,
long *sizePtr2)
{
long index;
long available = RingBuffer_GetWriteAvailable(rbuf);
if (numBytes > available)
long index;
long available = RingBuffer_GetWriteAvailable(rbuf);
if (numBytes > available)
numBytes = available;
/* Check to see if write is not contiguous. */
/* Check to see if write is not contiguous. */
index = rbuf->writeIndex & rbuf->smallMask;
if ((index + numBytes) > rbuf->bufferSize)
{
/* Write data in two blocks that wrap the buffer. */
if ((index + numBytes) > rbuf->bufferSize)
{
/* Write data in two blocks that wrap the buffer. */
long firstHalf = rbuf->bufferSize - index;
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = firstHalf;
*dataPtr2 = &rbuf->buffer[0];
*sizePtr2 = numBytes - firstHalf;
}
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = firstHalf;
*dataPtr2 = &rbuf->buffer[0];
*sizePtr2 = numBytes - firstHalf;
}
else
{
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = numBytes;
*dataPtr2 = NULL;
*sizePtr2 = 0;
}
return numBytes;
}
/***************************************************************************
*/
long RingBuffer_AdvanceWriteIndex(RingBuffer * rbuf, long numBytes)
{
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = numBytes;
*dataPtr2 = NULL;
*sizePtr2 = 0;
}
return numBytes;
}
/***************************************************************************
*/
long RingBuffer_AdvanceWriteIndex(RingBuffer * rbuf, long numBytes)
{
return rbuf->writeIndex = (rbuf->writeIndex + numBytes) & rbuf->bigMask;
}
/***************************************************************************
** Get address of region(s) from which we can read data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be written or numBytes, whichever is smaller.
*/
long RingBuffer_GetReadRegions(RingBuffer * rbuf, long numBytes, void **dataPtr1, long *sizePtr1, void **dataPtr2,
long *sizePtr2)
return rbuf->writeIndex = (rbuf->writeIndex + numBytes) & rbuf->bigMask;
}
/***************************************************************************
** Get address of region(s) from which we can read data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be written or numBytes, whichever is smaller.
*/
long RingBuffer_GetReadRegions(RingBuffer * rbuf, long numBytes, void **dataPtr1, long *sizePtr1, void **dataPtr2,
long *sizePtr2)
{
long index;
long available = RingBuffer_GetReadAvailable(rbuf);
if (numBytes > available)
long index;
long available = RingBuffer_GetReadAvailable(rbuf);
if (numBytes > available)
numBytes = available;
/* Check to see if read is not contiguous. */
/* Check to see if read is not contiguous. */
index = rbuf->readIndex & rbuf->smallMask;
if ((index + numBytes) > rbuf->bufferSize)
{
/* Write data in two blocks that wrap the buffer. */
if ((index + numBytes) > rbuf->bufferSize)
{
/* Write data in two blocks that wrap the buffer. */
long firstHalf = rbuf->bufferSize - index;
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = firstHalf;
*dataPtr2 = &rbuf->buffer[0];
*sizePtr2 = numBytes - firstHalf;
}
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = firstHalf;
*dataPtr2 = &rbuf->buffer[0];
*sizePtr2 = numBytes - firstHalf;
}
else
{
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = numBytes;
*dataPtr2 = NULL;
*sizePtr2 = 0;
}
return numBytes;
}
/***************************************************************************
*/
long RingBuffer_AdvanceReadIndex(RingBuffer * rbuf, long numBytes)
{
*dataPtr1 = &rbuf->buffer[index];
*sizePtr1 = numBytes;
*dataPtr2 = NULL;
*sizePtr2 = 0;
}
return numBytes;
}
/***************************************************************************
*/
long RingBuffer_AdvanceReadIndex(RingBuffer * rbuf, long numBytes)
{
return rbuf->readIndex = (rbuf->readIndex + numBytes) & rbuf->bigMask;
}
return rbuf->readIndex = (rbuf->readIndex + numBytes) & rbuf->bigMask;
}
/***************************************************************************
** Return bytes written. */
long RingBuffer_Write(RingBuffer * rbuf, void *data, long numBytes)
/***************************************************************************
** Return bytes written. */
long RingBuffer_Write(RingBuffer * rbuf, void *data, long numBytes)
{
long size1, size2, numWritten;
void *data1, *data2;
numWritten = RingBuffer_GetWriteRegions(rbuf, numBytes, &data1, &size1, &data2, &size2);
if (size2 > 0)
{
memcpy(data1, data, size1);
data = ((char *) data) + size1;
memcpy(data2, data, size2);
}
long size1, size2, numWritten;
void *data1, *data2;
numWritten = RingBuffer_GetWriteRegions(rbuf, numBytes, &data1, &size1, &data2, &size2);
if (size2 > 0)
{
memcpy(data1, data, size1);
data = ((char *) data) + size1;
memcpy(data2, data, size2);
}
else
{
memcpy(data1, data, size1);
}
RingBuffer_AdvanceWriteIndex(rbuf, numWritten);
return numWritten;
}
/***************************************************************************
** Return bytes read. */
long RingBuffer_Read(RingBuffer * rbuf, void *data, long numBytes)
{
memcpy(data1, data, size1);
}
RingBuffer_AdvanceWriteIndex(rbuf, numWritten);
return numWritten;
}
/***************************************************************************
** Return bytes read. */
long RingBuffer_Read(RingBuffer * rbuf, void *data, long numBytes)
{
long size1, size2, numRead;
void *data1, *data2;
numRead = RingBuffer_GetReadRegions(rbuf, numBytes, &data1, &size1, &data2, &size2);
if (size2 > 0)
{
memcpy(data, data1, size1);
data = ((char *) data) + size1;
memcpy(data, data2, size2);
}
long size1, size2, numRead;
void *data1, *data2;
numRead = RingBuffer_GetReadRegions(rbuf, numBytes, &data1, &size1, &data2, &size2);
if (size2 > 0)
{
memcpy(data, data1, size1);
data = ((char *) data) + size1;
memcpy(data, data2, size2);
}
else
{
memcpy(data, data1, size1);
}
RingBuffer_AdvanceReadIndex(rbuf, numRead);
return numRead;
}
{
memcpy(data, data1, size1);
}
RingBuffer_AdvanceReadIndex(rbuf, numRead);
return numRead;
}
src/mod/endpoints/mod_portaudio/ringbuffer.h
浏览文件 @ df1f3209
#ifndef _RINGBUFFER_H
#define _RINGBUFFER_H
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/*
* $Id: ringbuffer.h,v 1.1.1.1.4.2 2003/04/28 17:45:34 philburk Exp $
* ringbuffer.h
* Ring Buffer utility..
*
* Author: Phil Burk, http://www.softsynth.com
*
* This program is distributed with the PortAudio Portable Audio Library.
* For more information see: http://www.audiomulch.com/portaudio/
* Copyright (c) 1999-2000 Ross Bencina and 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.
*
* 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.
*
* 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.
*
*/
#define PortAudioStream PaStream
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "ringbuffer.h"
#include <string.h>
typedef struct
{
long bufferSize; /* Number of bytes in FIFO. Power of 2. Set by RingBuffer_Init. */
/* These are declared volatile because they are written by a different thread than the reader. */
volatile long writeIndex; /* Index of next writable byte. Set by RingBuffer_AdvanceWriteIndex. */
volatile long readIndex; /* Index of next readable byte. Set by RingBuffer_AdvanceReadIndex. */
long bigMask; /* Used for wrapping indices with extra bit to distinguish full/empty. */
long smallMask; /* Used for fitting indices to buffer. */
char *buffer;
}
RingBuffer;
/*
* Initialize Ring Buffer.
* numBytes must be power of 2, returns -1 if not.
*/
long RingBuffer_Init( RingBuffer *rbuf, long numBytes, void *dataPtr );
/* Clear buffer. Should only be called when buffer is NOT being read. */
void RingBuffer_Flush( RingBuffer *rbuf );
/* Return number of bytes available for writing. */
long RingBuffer_GetWriteAvailable( RingBuffer *rbuf );
/* Return number of bytes available for read. */
long RingBuffer_GetReadAvailable( RingBuffer *rbuf );
/* Return bytes written. */
long RingBuffer_Write( RingBuffer *rbuf, void *data, long numBytes );
/* Return bytes read. */
long RingBuffer_Read( RingBuffer *rbuf, void *data, long numBytes );
/* Get address of region(s) to which we can write data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be written or numBytes, whichever is smaller.
*/
long RingBuffer_GetWriteRegions( RingBuffer *rbuf, long numBytes,
void **dataPtr1, long *sizePtr1,
void **dataPtr2, long *sizePtr2 );
long RingBuffer_AdvanceWriteIndex( RingBuffer *rbuf, long numBytes );
/* Get address of region(s) from which we can read data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be read or numBytes, whichever is smaller.
*/
long RingBuffer_GetReadRegions( RingBuffer *rbuf, long numBytes,
void **dataPtr1, long *sizePtr1,
void **dataPtr2, long *sizePtr2 );
long RingBuffer_AdvanceReadIndex( RingBuffer *rbuf, long numBytes );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _RINGBUFFER_H */
#ifndef _RINGBUFFER_H
#define _RINGBUFFER_H
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/*
* $Id: ringbuffer.h,v 1.1.1.1.4.2 2003/04/28 17:45:34 philburk Exp $
* ringbuffer.h
* Ring Buffer utility..
*
* Author: Phil Burk, http://www.softsynth.com
*
* This program is distributed with the PortAudio Portable Audio Library.
* For more information see: http://www.audiomulch.com/portaudio/
* Copyright (c) 1999-2000 Ross Bencina and 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.
*
* 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.
*
* 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.
*
*/
#define PortAudioStream PaStream
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "ringbuffer.h"
#include <string.h>
typedef struct
{
long bufferSize; /* Number of bytes in FIFO. Power of 2. Set by RingBuffer_Init. */
/* These are declared volatile because they are written by a different thread than the reader. */
volatile long writeIndex; /* Index of next writable byte. Set by RingBuffer_AdvanceWriteIndex. */
volatile long readIndex; /* Index of next readable byte. Set by RingBuffer_AdvanceReadIndex. */
long bigMask; /* Used for wrapping indices with extra bit to distinguish full/empty. */
long smallMask; /* Used for fitting indices to buffer. */
char *buffer;
}
RingBuffer;
/*
* Initialize Ring Buffer.
* numBytes must be power of 2, returns -1 if not.
*/
long RingBuffer_Init( RingBuffer *rbuf, long numBytes, void *dataPtr );
/* Clear buffer. Should only be called when buffer is NOT being read. */
void RingBuffer_Flush( RingBuffer *rbuf );
/* Return number of bytes available for writing. */
long RingBuffer_GetWriteAvailable( RingBuffer *rbuf );
/* Return number of bytes available for read. */
long RingBuffer_GetReadAvailable( RingBuffer *rbuf );
/* Return bytes written. */
long RingBuffer_Write( RingBuffer *rbuf, void *data, long numBytes );
/* Return bytes read. */
long RingBuffer_Read( RingBuffer *rbuf, void *data, long numBytes );
/* Get address of region(s) to which we can write data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be written or numBytes, whichever is smaller.
*/
long RingBuffer_GetWriteRegions( RingBuffer *rbuf, long numBytes,
void **dataPtr1, long *sizePtr1,
void **dataPtr2, long *sizePtr2 );
long RingBuffer_AdvanceWriteIndex( RingBuffer *rbuf, long numBytes );
/* Get address of region(s) from which we can read data.
** If the region is contiguous, size2 will be zero.
** If non-contiguous, size2 will be the size of second region.
** Returns room available to be read or numBytes, whichever is smaller.
*/
long RingBuffer_GetReadRegions( RingBuffer *rbuf, long numBytes,
void **dataPtr1, long *sizePtr1,
void **dataPtr2, long *sizePtr2 );
long RingBuffer_AdvanceReadIndex( RingBuffer *rbuf, long numBytes );
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _RINGBUFFER_H */
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