mirror of
https://github.com/cookiengineer/audacity
synced 2025-10-10 16:43:33 +02:00
Reverting r12850...hopefully
Never removed one before, but I'm pretty sure it is correct.
This commit is contained in:
lllucius
@@ -1,122 +1,122 @@
|
||||
#include <math.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "biquad_filter.h"
|
||||
|
||||
/**
|
||||
* Unit_BiquadFilter implements a second order IIR filter.
|
||||
Here is the equation that we use for this filter:
|
||||
y(n) = a0*x(n) + a1*x(n-1) + a2*x(n-2) - b1*y(n-1) - b2*y(n-2)
|
||||
*
|
||||
* @author (C) 2002 Phil Burk, SoftSynth.com, All Rights Reserved
|
||||
*/
|
||||
|
||||
#define FILTER_PI (3.141592653589793238462643)
|
||||
/***********************************************************
|
||||
** Calculate coefficients common to many parametric biquad filters.
|
||||
*/
|
||||
static void BiquadFilter_CalculateCommon( BiquadFilter *filter, double ratio, double Q )
|
||||
{
|
||||
double omega;
|
||||
|
||||
memset( filter, 0, sizeof(BiquadFilter) );
|
||||
|
||||
/* Don't let frequency get too close to Nyquist or filter will blow up. */
|
||||
if( ratio >= 0.499 ) ratio = 0.499;
|
||||
omega = 2.0 * (double)FILTER_PI * ratio;
|
||||
|
||||
filter->cos_omega = (double) cos( omega );
|
||||
filter->sin_omega = (double) sin( omega );
|
||||
filter->alpha = filter->sin_omega / (2.0 * Q);
|
||||
}
|
||||
|
||||
/*********************************************************************************
|
||||
** Calculate coefficients for Highpass filter.
|
||||
*/
|
||||
void BiquadFilter_SetupHighPass( BiquadFilter *filter, double ratio, double Q )
|
||||
{
|
||||
double scalar, opc;
|
||||
|
||||
if( ratio < BIQUAD_MIN_RATIO ) ratio = BIQUAD_MIN_RATIO;
|
||||
if( Q < BIQUAD_MIN_Q ) Q = BIQUAD_MIN_Q;
|
||||
|
||||
BiquadFilter_CalculateCommon( filter, ratio, Q );
|
||||
|
||||
scalar = 1.0 / (1.0 + filter->alpha);
|
||||
opc = (1.0 + filter->cos_omega);
|
||||
|
||||
filter->a0 = opc * 0.5 * scalar;
|
||||
filter->a1 = - opc * scalar;
|
||||
filter->a2 = filter->a0;
|
||||
filter->b1 = -2.0 * filter->cos_omega * scalar;
|
||||
filter->b2 = (1.0 - filter->alpha) * scalar;
|
||||
}
|
||||
|
||||
|
||||
/*********************************************************************************
|
||||
** Calculate coefficients for Notch filter.
|
||||
*/
|
||||
void BiquadFilter_SetupNotch( BiquadFilter *filter, double ratio, double Q )
|
||||
{
|
||||
double scalar, opc;
|
||||
|
||||
if( ratio < BIQUAD_MIN_RATIO ) ratio = BIQUAD_MIN_RATIO;
|
||||
if( Q < BIQUAD_MIN_Q ) Q = BIQUAD_MIN_Q;
|
||||
|
||||
BiquadFilter_CalculateCommon( filter, ratio, Q );
|
||||
|
||||
scalar = 1.0 / (1.0 + filter->alpha);
|
||||
opc = (1.0 + filter->cos_omega);
|
||||
|
||||
filter->a0 = scalar;
|
||||
filter->a1 = -2.0 * filter->cos_omega * scalar;
|
||||
filter->a2 = filter->a0;
|
||||
filter->b1 = filter->a1;
|
||||
filter->b2 = (1.0 - filter->alpha) * scalar;
|
||||
}
|
||||
|
||||
/*****************************************************************
|
||||
** Perform core IIR filter calculation without permutation.
|
||||
*/
|
||||
void BiquadFilter_Filter( BiquadFilter *filter, float *inputs, float *outputs, int numSamples )
|
||||
{
|
||||
int i;
|
||||
double xn, yn;
|
||||
// Pull values from structure to speed up the calculation.
|
||||
double a0 = filter->a0;
|
||||
double a1 = filter->a1;
|
||||
double a2 = filter->a2;
|
||||
double b1 = filter->b1;
|
||||
double b2 = filter->b2;
|
||||
double xn1 = filter->xn1;
|
||||
double xn2 = filter->xn2;
|
||||
double yn1 = filter->yn1;
|
||||
double yn2 = filter->yn2;
|
||||
|
||||
for( i=0; i<numSamples; i++)
|
||||
{
|
||||
// Generate outputs by filtering inputs.
|
||||
xn = inputs[i];
|
||||
yn = (a0 * xn) + (a1 * xn1) + (a2 * xn2) - (b1 * yn1) - (b2 * yn2);
|
||||
outputs[i] = yn;
|
||||
|
||||
// Delay input and output values.
|
||||
xn2 = xn1;
|
||||
xn1 = xn;
|
||||
yn2 = yn1;
|
||||
yn1 = yn;
|
||||
|
||||
if( (i & 7) == 0 )
|
||||
{
|
||||
// Apply a small bipolar impulse to filter to prevent arithmetic underflow.
|
||||
// Underflows can cause the FPU to interrupt the CPU.
|
||||
yn1 += (double) 1.0E-26;
|
||||
yn2 -= (double) 1.0E-26;
|
||||
}
|
||||
}
|
||||
|
||||
filter->xn1 = xn1;
|
||||
filter->xn2 = xn2;
|
||||
filter->yn1 = yn1;
|
||||
filter->yn2 = yn2;
|
||||
#include <math.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "biquad_filter.h"
|
||||
|
||||
/**
|
||||
* Unit_BiquadFilter implements a second order IIR filter.
|
||||
Here is the equation that we use for this filter:
|
||||
y(n) = a0*x(n) + a1*x(n-1) + a2*x(n-2) - b1*y(n-1) - b2*y(n-2)
|
||||
*
|
||||
* @author (C) 2002 Phil Burk, SoftSynth.com, All Rights Reserved
|
||||
*/
|
||||
|
||||
#define FILTER_PI (3.141592653589793238462643)
|
||||
/***********************************************************
|
||||
** Calculate coefficients common to many parametric biquad filters.
|
||||
*/
|
||||
static void BiquadFilter_CalculateCommon( BiquadFilter *filter, double ratio, double Q )
|
||||
{
|
||||
double omega;
|
||||
|
||||
memset( filter, 0, sizeof(BiquadFilter) );
|
||||
|
||||
/* Don't let frequency get too close to Nyquist or filter will blow up. */
|
||||
if( ratio >= 0.499 ) ratio = 0.499;
|
||||
omega = 2.0 * (double)FILTER_PI * ratio;
|
||||
|
||||
filter->cos_omega = (double) cos( omega );
|
||||
filter->sin_omega = (double) sin( omega );
|
||||
filter->alpha = filter->sin_omega / (2.0 * Q);
|
||||
}
|
||||
|
||||
/*********************************************************************************
|
||||
** Calculate coefficients for Highpass filter.
|
||||
*/
|
||||
void BiquadFilter_SetupHighPass( BiquadFilter *filter, double ratio, double Q )
|
||||
{
|
||||
double scalar, opc;
|
||||
|
||||
if( ratio < BIQUAD_MIN_RATIO ) ratio = BIQUAD_MIN_RATIO;
|
||||
if( Q < BIQUAD_MIN_Q ) Q = BIQUAD_MIN_Q;
|
||||
|
||||
BiquadFilter_CalculateCommon( filter, ratio, Q );
|
||||
|
||||
scalar = 1.0 / (1.0 + filter->alpha);
|
||||
opc = (1.0 + filter->cos_omega);
|
||||
|
||||
filter->a0 = opc * 0.5 * scalar;
|
||||
filter->a1 = - opc * scalar;
|
||||
filter->a2 = filter->a0;
|
||||
filter->b1 = -2.0 * filter->cos_omega * scalar;
|
||||
filter->b2 = (1.0 - filter->alpha) * scalar;
|
||||
}
|
||||
|
||||
|
||||
/*********************************************************************************
|
||||
** Calculate coefficients for Notch filter.
|
||||
*/
|
||||
void BiquadFilter_SetupNotch( BiquadFilter *filter, double ratio, double Q )
|
||||
{
|
||||
double scalar, opc;
|
||||
|
||||
if( ratio < BIQUAD_MIN_RATIO ) ratio = BIQUAD_MIN_RATIO;
|
||||
if( Q < BIQUAD_MIN_Q ) Q = BIQUAD_MIN_Q;
|
||||
|
||||
BiquadFilter_CalculateCommon( filter, ratio, Q );
|
||||
|
||||
scalar = 1.0 / (1.0 + filter->alpha);
|
||||
opc = (1.0 + filter->cos_omega);
|
||||
|
||||
filter->a0 = scalar;
|
||||
filter->a1 = -2.0 * filter->cos_omega * scalar;
|
||||
filter->a2 = filter->a0;
|
||||
filter->b1 = filter->a1;
|
||||
filter->b2 = (1.0 - filter->alpha) * scalar;
|
||||
}
|
||||
|
||||
/*****************************************************************
|
||||
** Perform core IIR filter calculation without permutation.
|
||||
*/
|
||||
void BiquadFilter_Filter( BiquadFilter *filter, float *inputs, float *outputs, int numSamples )
|
||||
{
|
||||
int i;
|
||||
double xn, yn;
|
||||
// Pull values from structure to speed up the calculation.
|
||||
double a0 = filter->a0;
|
||||
double a1 = filter->a1;
|
||||
double a2 = filter->a2;
|
||||
double b1 = filter->b1;
|
||||
double b2 = filter->b2;
|
||||
double xn1 = filter->xn1;
|
||||
double xn2 = filter->xn2;
|
||||
double yn1 = filter->yn1;
|
||||
double yn2 = filter->yn2;
|
||||
|
||||
for( i=0; i<numSamples; i++)
|
||||
{
|
||||
// Generate outputs by filtering inputs.
|
||||
xn = inputs[i];
|
||||
yn = (a0 * xn) + (a1 * xn1) + (a2 * xn2) - (b1 * yn1) - (b2 * yn2);
|
||||
outputs[i] = yn;
|
||||
|
||||
// Delay input and output values.
|
||||
xn2 = xn1;
|
||||
xn1 = xn;
|
||||
yn2 = yn1;
|
||||
yn1 = yn;
|
||||
|
||||
if( (i & 7) == 0 )
|
||||
{
|
||||
// Apply a small bipolar impulse to filter to prevent arithmetic underflow.
|
||||
// Underflows can cause the FPU to interrupt the CPU.
|
||||
yn1 += (double) 1.0E-26;
|
||||
yn2 -= (double) 1.0E-26;
|
||||
}
|
||||
}
|
||||
|
||||
filter->xn1 = xn1;
|
||||
filter->xn2 = xn2;
|
||||
filter->yn1 = yn1;
|
||||
filter->yn2 = yn2;
|
||||
}
|
||||
@@ -1,38 +1,38 @@
|
||||
#ifndef _BIQUADFILTER_H
|
||||
#define _BIQUADFILTER_H
|
||||
|
||||
|
||||
/**
|
||||
* Unit_BiquadFilter implements a second order IIR filter.
|
||||
*
|
||||
* @author (C) 2002 Phil Burk, SoftSynth.com, All Rights Reserved
|
||||
*/
|
||||
|
||||
#define BIQUAD_MIN_RATIO (0.000001)
|
||||
#define BIQUAD_MIN_Q (0.00001)
|
||||
|
||||
typedef struct BiquadFilter_s
|
||||
{
|
||||
double xn1; // storage for delayed signals
|
||||
double xn2;
|
||||
double yn1;
|
||||
double yn2;
|
||||
|
||||
double a0; // coefficients
|
||||
double a1;
|
||||
double a2;
|
||||
|
||||
double b1;
|
||||
double b2;
|
||||
|
||||
double cos_omega;
|
||||
double sin_omega;
|
||||
double alpha;
|
||||
} BiquadFilter;
|
||||
|
||||
void BiquadFilter_SetupHighPass( BiquadFilter *filter, double ratio, double Q );
|
||||
void BiquadFilter_SetupNotch( BiquadFilter *filter, double ratio, double Q );
|
||||
|
||||
void BiquadFilter_Filter( BiquadFilter *filter, float *inputs, float *outputs, int numSamples );
|
||||
|
||||
#endif
|
||||
#ifndef _BIQUADFILTER_H
|
||||
#define _BIQUADFILTER_H
|
||||
|
||||
|
||||
/**
|
||||
* Unit_BiquadFilter implements a second order IIR filter.
|
||||
*
|
||||
* @author (C) 2002 Phil Burk, SoftSynth.com, All Rights Reserved
|
||||
*/
|
||||
|
||||
#define BIQUAD_MIN_RATIO (0.000001)
|
||||
#define BIQUAD_MIN_Q (0.00001)
|
||||
|
||||
typedef struct BiquadFilter_s
|
||||
{
|
||||
double xn1; // storage for delayed signals
|
||||
double xn2;
|
||||
double yn1;
|
||||
double yn2;
|
||||
|
||||
double a0; // coefficients
|
||||
double a1;
|
||||
double a2;
|
||||
|
||||
double b1;
|
||||
double b2;
|
||||
|
||||
double cos_omega;
|
||||
double sin_omega;
|
||||
double alpha;
|
||||
} BiquadFilter;
|
||||
|
||||
void BiquadFilter_SetupHighPass( BiquadFilter *filter, double ratio, double Q );
|
||||
void BiquadFilter_SetupNotch( BiquadFilter *filter, double ratio, double Q );
|
||||
|
||||
void BiquadFilter_Filter( BiquadFilter *filter, float *inputs, float *outputs, int numSamples );
|
||||
|
||||
#endif
|
||||
|
||||
@@ -1,74 +1,74 @@
|
||||
|
||||
/*
|
||||
* PortAudio Portable Real-Time Audio Library
|
||||
* Latest Version at: http://www.portaudio.com
|
||||
*
|
||||
* Copyright (c) 1999-2010 Phil Burk and Ross Bencina
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef _QA_TOOLS_H
|
||||
#define _QA_TOOLS_H
|
||||
|
||||
extern int g_testsPassed;
|
||||
extern int g_testsFailed;
|
||||
|
||||
#define QA_ASSERT_TRUE( message, flag ) \
|
||||
if( !(flag) ) \
|
||||
{ \
|
||||
printf( "%s:%d - ERROR - %s\n", __FILE__, __LINE__, message ); \
|
||||
g_testsFailed++; \
|
||||
goto error; \
|
||||
} \
|
||||
else g_testsPassed++;
|
||||
|
||||
|
||||
#define QA_ASSERT_EQUALS( message, expected, actual ) \
|
||||
if( ((expected) != (actual)) ) \
|
||||
{ \
|
||||
printf( "%s:%d - ERROR - %s, expected %d, got %d\n", __FILE__, __LINE__, message, expected, actual ); \
|
||||
g_testsFailed++; \
|
||||
goto error; \
|
||||
} \
|
||||
else g_testsPassed++;
|
||||
|
||||
#define QA_ASSERT_CLOSE( message, expected, actual, tolerance ) \
|
||||
if (fabs((expected)-(actual))>(tolerance)) \
|
||||
{ \
|
||||
printf( "%s:%d - ERROR - %s, expected %f, got %f, tol=%f\n", __FILE__, __LINE__, message, ((double)(expected)), ((double)(actual)), ((double)(tolerance)) ); \
|
||||
g_testsFailed++; \
|
||||
goto error; \
|
||||
} \
|
||||
else g_testsPassed++;
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
/*
|
||||
* PortAudio Portable Real-Time Audio Library
|
||||
* Latest Version at: http://www.portaudio.com
|
||||
*
|
||||
* Copyright (c) 1999-2010 Phil Burk and Ross Bencina
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef _QA_TOOLS_H
|
||||
#define _QA_TOOLS_H
|
||||
|
||||
extern int g_testsPassed;
|
||||
extern int g_testsFailed;
|
||||
|
||||
#define QA_ASSERT_TRUE( message, flag ) \
|
||||
if( !(flag) ) \
|
||||
{ \
|
||||
printf( "%s:%d - ERROR - %s\n", __FILE__, __LINE__, message ); \
|
||||
g_testsFailed++; \
|
||||
goto error; \
|
||||
} \
|
||||
else g_testsPassed++;
|
||||
|
||||
|
||||
#define QA_ASSERT_EQUALS( message, expected, actual ) \
|
||||
if( ((expected) != (actual)) ) \
|
||||
{ \
|
||||
printf( "%s:%d - ERROR - %s, expected %d, got %d\n", __FILE__, __LINE__, message, expected, actual ); \
|
||||
g_testsFailed++; \
|
||||
goto error; \
|
||||
} \
|
||||
else g_testsPassed++;
|
||||
|
||||
#define QA_ASSERT_CLOSE( message, expected, actual, tolerance ) \
|
||||
if (fabs((expected)-(actual))>(tolerance)) \
|
||||
{ \
|
||||
printf( "%s:%d - ERROR - %s, expected %f, got %f, tol=%f\n", __FILE__, __LINE__, message, ((double)(expected)), ((double)(actual)), ((double)(tolerance)) ); \
|
||||
g_testsFailed++; \
|
||||
goto error; \
|
||||
} \
|
||||
else g_testsPassed++;
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
@@ -1,242 +1,242 @@
|
||||
/*
|
||||
* PortAudio Portable Real-Time Audio Library
|
||||
* Latest Version at: http://www.portaudio.com
|
||||
*
|
||||
* Copyright (c) 1999-2010 Phil Burk and Ross Bencina
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
/**
|
||||
* Very simple WAV file writer for saving captured audio.
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include "write_wav.h"
|
||||
|
||||
|
||||
/* Write long word data to a little endian format byte array. */
|
||||
static void WriteLongLE( unsigned char **addrPtr, unsigned long data )
|
||||
{
|
||||
unsigned char *addr = *addrPtr;
|
||||
*addr++ = (unsigned char) data;
|
||||
*addr++ = (unsigned char) (data>>8);
|
||||
*addr++ = (unsigned char) (data>>16);
|
||||
*addr++ = (unsigned char) (data>>24);
|
||||
*addrPtr = addr;
|
||||
}
|
||||
|
||||
/* Write short word data to a little endian format byte array. */
|
||||
static void WriteShortLE( unsigned char **addrPtr, unsigned short data )
|
||||
{
|
||||
unsigned char *addr = *addrPtr;
|
||||
*addr++ = (unsigned char) data;
|
||||
*addr++ = (unsigned char) (data>>8);
|
||||
*addrPtr = addr;
|
||||
}
|
||||
|
||||
/* Write IFF ChunkType data to a byte array. */
|
||||
static void WriteChunkType( unsigned char **addrPtr, unsigned long cktyp )
|
||||
{
|
||||
unsigned char *addr = *addrPtr;
|
||||
*addr++ = (unsigned char) (cktyp>>24);
|
||||
*addr++ = (unsigned char) (cktyp>>16);
|
||||
*addr++ = (unsigned char) (cktyp>>8);
|
||||
*addr++ = (unsigned char) cktyp;
|
||||
*addrPtr = addr;
|
||||
}
|
||||
|
||||
#define WAV_HEADER_SIZE (4 + 4 + 4 + /* RIFF+size+WAVE */ \
|
||||
4 + 4 + 16 + /* fmt chunk */ \
|
||||
4 + 4 ) /* data chunk */
|
||||
|
||||
|
||||
/*********************************************************************************
|
||||
* Open named file and write WAV header to the file.
|
||||
* The header includes the DATA chunk type and size.
|
||||
* Returns number of bytes written to file or negative error code.
|
||||
*/
|
||||
long Audio_WAV_OpenWriter( WAV_Writer *writer, const char *fileName, int frameRate, int samplesPerFrame )
|
||||
{
|
||||
unsigned int bytesPerSecond;
|
||||
unsigned char header[ WAV_HEADER_SIZE ];
|
||||
unsigned char *addr = header;
|
||||
int numWritten;
|
||||
|
||||
writer->dataSize = 0;
|
||||
writer->dataSizeOffset = 0;
|
||||
|
||||
writer->fid = fopen( fileName, "wb" );
|
||||
if( writer->fid == NULL )
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Write RIFF header. */
|
||||
WriteChunkType( &addr, RIFF_ID );
|
||||
|
||||
/* Write RIFF size as zero for now. Will patch later. */
|
||||
WriteLongLE( &addr, 0 );
|
||||
|
||||
/* Write WAVE form ID. */
|
||||
WriteChunkType( &addr, WAVE_ID );
|
||||
|
||||
/* Write format chunk based on AudioSample structure. */
|
||||
WriteChunkType( &addr, FMT_ID );
|
||||
WriteLongLE( &addr, 16 );
|
||||
WriteShortLE( &addr, WAVE_FORMAT_PCM );
|
||||
bytesPerSecond = frameRate * samplesPerFrame * sizeof( short);
|
||||
WriteShortLE( &addr, (short) samplesPerFrame );
|
||||
WriteLongLE( &addr, frameRate );
|
||||
WriteLongLE( &addr, bytesPerSecond );
|
||||
WriteShortLE( &addr, (short) (samplesPerFrame * sizeof( short)) ); /* bytesPerBlock */
|
||||
WriteShortLE( &addr, (short) 16 ); /* bits per sample */
|
||||
|
||||
/* Write ID and size for 'data' chunk. */
|
||||
WriteChunkType( &addr, DATA_ID );
|
||||
/* Save offset so we can patch it later. */
|
||||
writer->dataSizeOffset = (int) (addr - header);
|
||||
WriteLongLE( &addr, 0 );
|
||||
|
||||
numWritten = fwrite( header, 1, sizeof(header), writer->fid );
|
||||
if( numWritten != sizeof(header) ) return -1;
|
||||
|
||||
return (int) numWritten;
|
||||
}
|
||||
|
||||
/*********************************************************************************
|
||||
* Write to the data chunk portion of a WAV file.
|
||||
* Returns bytes written or negative error code.
|
||||
*/
|
||||
long Audio_WAV_WriteShorts( WAV_Writer *writer,
|
||||
short *samples,
|
||||
int numSamples
|
||||
)
|
||||
{
|
||||
unsigned char buffer[2];
|
||||
unsigned char *bufferPtr;
|
||||
int i;
|
||||
short *p = samples;
|
||||
int numWritten;
|
||||
int bytesWritten;
|
||||
if( numSamples <= 0 )
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
|
||||
for( i=0; i<numSamples; i++ )
|
||||
{
|
||||
bufferPtr = buffer;
|
||||
WriteShortLE( &bufferPtr, *p++ );
|
||||
numWritten = fwrite( buffer, 1, sizeof( buffer), writer->fid );
|
||||
if( numWritten != sizeof(buffer) ) return -1;
|
||||
}
|
||||
bytesWritten = numSamples * sizeof(short);
|
||||
writer->dataSize += bytesWritten;
|
||||
return (int) bytesWritten;
|
||||
}
|
||||
|
||||
/*********************************************************************************
|
||||
* Close WAV file.
|
||||
* Update chunk sizes so it can be read by audio applications.
|
||||
*/
|
||||
long Audio_WAV_CloseWriter( WAV_Writer *writer )
|
||||
{
|
||||
unsigned char buffer[4];
|
||||
unsigned char *bufferPtr;
|
||||
int numWritten;
|
||||
int riffSize;
|
||||
|
||||
/* Go back to beginning of file and update DATA size */
|
||||
int result = fseek( writer->fid, writer->dataSizeOffset, SEEK_SET );
|
||||
if( result < 0 ) return result;
|
||||
|
||||
bufferPtr = buffer;
|
||||
WriteLongLE( &bufferPtr, writer->dataSize );
|
||||
numWritten = fwrite( buffer, 1, sizeof( buffer), writer->fid );
|
||||
if( numWritten != sizeof(buffer) ) return -1;
|
||||
|
||||
/* Update RIFF size */
|
||||
result = fseek( writer->fid, 4, SEEK_SET );
|
||||
if( result < 0 ) return result;
|
||||
|
||||
riffSize = writer->dataSize + (WAV_HEADER_SIZE - 8);
|
||||
bufferPtr = buffer;
|
||||
WriteLongLE( &bufferPtr, riffSize );
|
||||
numWritten = fwrite( buffer, 1, sizeof( buffer), writer->fid );
|
||||
if( numWritten != sizeof(buffer) ) return -1;
|
||||
|
||||
fclose( writer->fid );
|
||||
writer->fid = NULL;
|
||||
return writer->dataSize;
|
||||
}
|
||||
|
||||
/*********************************************************************************
|
||||
* Simple test that write a sawtooth waveform to a file.
|
||||
*/
|
||||
#if 0
|
||||
int main( void )
|
||||
{
|
||||
int i;
|
||||
WAV_Writer writer;
|
||||
int result;
|
||||
#define NUM_SAMPLES (200)
|
||||
short data[NUM_SAMPLES];
|
||||
short saw = 0;
|
||||
|
||||
for( i=0; i<NUM_SAMPLES; i++ )
|
||||
{
|
||||
data[i] = saw;
|
||||
saw += 293;
|
||||
}
|
||||
|
||||
|
||||
result = Audio_WAV_OpenWriter( &writer, "rendered_midi.wav", 44100, 1 );
|
||||
if( result < 0 ) goto error;
|
||||
|
||||
for( i=0; i<15; i++ )
|
||||
{
|
||||
result = Audio_WAV_WriteShorts( &writer, data, NUM_SAMPLES );
|
||||
if( result < 0 ) goto error;
|
||||
}
|
||||
|
||||
result = Audio_WAV_CloseWriter( &writer );
|
||||
if( result < 0 ) goto error;
|
||||
|
||||
|
||||
return 0;
|
||||
|
||||
error:
|
||||
printf("ERROR: result = %d\n", result );
|
||||
return result;
|
||||
}
|
||||
#endif
|
||||
/*
|
||||
* PortAudio Portable Real-Time Audio Library
|
||||
* Latest Version at: http://www.portaudio.com
|
||||
*
|
||||
* Copyright (c) 1999-2010 Phil Burk and Ross Bencina
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
/**
|
||||
* Very simple WAV file writer for saving captured audio.
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include "write_wav.h"
|
||||
|
||||
|
||||
/* Write long word data to a little endian format byte array. */
|
||||
static void WriteLongLE( unsigned char **addrPtr, unsigned long data )
|
||||
{
|
||||
unsigned char *addr = *addrPtr;
|
||||
*addr++ = (unsigned char) data;
|
||||
*addr++ = (unsigned char) (data>>8);
|
||||
*addr++ = (unsigned char) (data>>16);
|
||||
*addr++ = (unsigned char) (data>>24);
|
||||
*addrPtr = addr;
|
||||
}
|
||||
|
||||
/* Write short word data to a little endian format byte array. */
|
||||
static void WriteShortLE( unsigned char **addrPtr, unsigned short data )
|
||||
{
|
||||
unsigned char *addr = *addrPtr;
|
||||
*addr++ = (unsigned char) data;
|
||||
*addr++ = (unsigned char) (data>>8);
|
||||
*addrPtr = addr;
|
||||
}
|
||||
|
||||
/* Write IFF ChunkType data to a byte array. */
|
||||
static void WriteChunkType( unsigned char **addrPtr, unsigned long cktyp )
|
||||
{
|
||||
unsigned char *addr = *addrPtr;
|
||||
*addr++ = (unsigned char) (cktyp>>24);
|
||||
*addr++ = (unsigned char) (cktyp>>16);
|
||||
*addr++ = (unsigned char) (cktyp>>8);
|
||||
*addr++ = (unsigned char) cktyp;
|
||||
*addrPtr = addr;
|
||||
}
|
||||
|
||||
#define WAV_HEADER_SIZE (4 + 4 + 4 + /* RIFF+size+WAVE */ \
|
||||
4 + 4 + 16 + /* fmt chunk */ \
|
||||
4 + 4 ) /* data chunk */
|
||||
|
||||
|
||||
/*********************************************************************************
|
||||
* Open named file and write WAV header to the file.
|
||||
* The header includes the DATA chunk type and size.
|
||||
* Returns number of bytes written to file or negative error code.
|
||||
*/
|
||||
long Audio_WAV_OpenWriter( WAV_Writer *writer, const char *fileName, int frameRate, int samplesPerFrame )
|
||||
{
|
||||
unsigned int bytesPerSecond;
|
||||
unsigned char header[ WAV_HEADER_SIZE ];
|
||||
unsigned char *addr = header;
|
||||
int numWritten;
|
||||
|
||||
writer->dataSize = 0;
|
||||
writer->dataSizeOffset = 0;
|
||||
|
||||
writer->fid = fopen( fileName, "wb" );
|
||||
if( writer->fid == NULL )
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Write RIFF header. */
|
||||
WriteChunkType( &addr, RIFF_ID );
|
||||
|
||||
/* Write RIFF size as zero for now. Will patch later. */
|
||||
WriteLongLE( &addr, 0 );
|
||||
|
||||
/* Write WAVE form ID. */
|
||||
WriteChunkType( &addr, WAVE_ID );
|
||||
|
||||
/* Write format chunk based on AudioSample structure. */
|
||||
WriteChunkType( &addr, FMT_ID );
|
||||
WriteLongLE( &addr, 16 );
|
||||
WriteShortLE( &addr, WAVE_FORMAT_PCM );
|
||||
bytesPerSecond = frameRate * samplesPerFrame * sizeof( short);
|
||||
WriteShortLE( &addr, (short) samplesPerFrame );
|
||||
WriteLongLE( &addr, frameRate );
|
||||
WriteLongLE( &addr, bytesPerSecond );
|
||||
WriteShortLE( &addr, (short) (samplesPerFrame * sizeof( short)) ); /* bytesPerBlock */
|
||||
WriteShortLE( &addr, (short) 16 ); /* bits per sample */
|
||||
|
||||
/* Write ID and size for 'data' chunk. */
|
||||
WriteChunkType( &addr, DATA_ID );
|
||||
/* Save offset so we can patch it later. */
|
||||
writer->dataSizeOffset = (int) (addr - header);
|
||||
WriteLongLE( &addr, 0 );
|
||||
|
||||
numWritten = fwrite( header, 1, sizeof(header), writer->fid );
|
||||
if( numWritten != sizeof(header) ) return -1;
|
||||
|
||||
return (int) numWritten;
|
||||
}
|
||||
|
||||
/*********************************************************************************
|
||||
* Write to the data chunk portion of a WAV file.
|
||||
* Returns bytes written or negative error code.
|
||||
*/
|
||||
long Audio_WAV_WriteShorts( WAV_Writer *writer,
|
||||
short *samples,
|
||||
int numSamples
|
||||
)
|
||||
{
|
||||
unsigned char buffer[2];
|
||||
unsigned char *bufferPtr;
|
||||
int i;
|
||||
short *p = samples;
|
||||
int numWritten;
|
||||
int bytesWritten;
|
||||
if( numSamples <= 0 )
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
|
||||
for( i=0; i<numSamples; i++ )
|
||||
{
|
||||
bufferPtr = buffer;
|
||||
WriteShortLE( &bufferPtr, *p++ );
|
||||
numWritten = fwrite( buffer, 1, sizeof( buffer), writer->fid );
|
||||
if( numWritten != sizeof(buffer) ) return -1;
|
||||
}
|
||||
bytesWritten = numSamples * sizeof(short);
|
||||
writer->dataSize += bytesWritten;
|
||||
return (int) bytesWritten;
|
||||
}
|
||||
|
||||
/*********************************************************************************
|
||||
* Close WAV file.
|
||||
* Update chunk sizes so it can be read by audio applications.
|
||||
*/
|
||||
long Audio_WAV_CloseWriter( WAV_Writer *writer )
|
||||
{
|
||||
unsigned char buffer[4];
|
||||
unsigned char *bufferPtr;
|
||||
int numWritten;
|
||||
int riffSize;
|
||||
|
||||
/* Go back to beginning of file and update DATA size */
|
||||
int result = fseek( writer->fid, writer->dataSizeOffset, SEEK_SET );
|
||||
if( result < 0 ) return result;
|
||||
|
||||
bufferPtr = buffer;
|
||||
WriteLongLE( &bufferPtr, writer->dataSize );
|
||||
numWritten = fwrite( buffer, 1, sizeof( buffer), writer->fid );
|
||||
if( numWritten != sizeof(buffer) ) return -1;
|
||||
|
||||
/* Update RIFF size */
|
||||
result = fseek( writer->fid, 4, SEEK_SET );
|
||||
if( result < 0 ) return result;
|
||||
|
||||
riffSize = writer->dataSize + (WAV_HEADER_SIZE - 8);
|
||||
bufferPtr = buffer;
|
||||
WriteLongLE( &bufferPtr, riffSize );
|
||||
numWritten = fwrite( buffer, 1, sizeof( buffer), writer->fid );
|
||||
if( numWritten != sizeof(buffer) ) return -1;
|
||||
|
||||
fclose( writer->fid );
|
||||
writer->fid = NULL;
|
||||
return writer->dataSize;
|
||||
}
|
||||
|
||||
/*********************************************************************************
|
||||
* Simple test that write a sawtooth waveform to a file.
|
||||
*/
|
||||
#if 0
|
||||
int main( void )
|
||||
{
|
||||
int i;
|
||||
WAV_Writer writer;
|
||||
int result;
|
||||
#define NUM_SAMPLES (200)
|
||||
short data[NUM_SAMPLES];
|
||||
short saw = 0;
|
||||
|
||||
for( i=0; i<NUM_SAMPLES; i++ )
|
||||
{
|
||||
data[i] = saw;
|
||||
saw += 293;
|
||||
}
|
||||
|
||||
|
||||
result = Audio_WAV_OpenWriter( &writer, "rendered_midi.wav", 44100, 1 );
|
||||
if( result < 0 ) goto error;
|
||||
|
||||
for( i=0; i<15; i++ )
|
||||
{
|
||||
result = Audio_WAV_WriteShorts( &writer, data, NUM_SAMPLES );
|
||||
if( result < 0 ) goto error;
|
||||
}
|
||||
|
||||
result = Audio_WAV_CloseWriter( &writer );
|
||||
if( result < 0 ) goto error;
|
||||
|
||||
|
||||
return 0;
|
||||
|
||||
error:
|
||||
printf("ERROR: result = %d\n", result );
|
||||
return result;
|
||||
}
|
||||
#endif
|
||||
|
||||
@@ -1,103 +1,103 @@
|
||||
/*
|
||||
* PortAudio Portable Real-Time Audio Library
|
||||
* Latest Version at: http://www.portaudio.com
|
||||
*
|
||||
* Copyright (c) 1999-2010 Phil Burk and Ross Bencina
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
#ifndef _WAV_WRITER_H
|
||||
#define _WAV_WRITER_H
|
||||
|
||||
/*
|
||||
* WAV file writer.
|
||||
*
|
||||
* Author: Phil Burk
|
||||
*/
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
/* Define WAV Chunk and FORM types as 4 byte integers. */
|
||||
#define RIFF_ID (('R'<<24) | ('I'<<16) | ('F'<<8) | 'F')
|
||||
#define WAVE_ID (('W'<<24) | ('A'<<16) | ('V'<<8) | 'E')
|
||||
#define FMT_ID (('f'<<24) | ('m'<<16) | ('t'<<8) | ' ')
|
||||
#define DATA_ID (('d'<<24) | ('a'<<16) | ('t'<<8) | 'a')
|
||||
#define FACT_ID (('f'<<24) | ('a'<<16) | ('c'<<8) | 't')
|
||||
|
||||
/* Errors returned by Audio_ParseSampleImage_WAV */
|
||||
#define WAV_ERR_CHUNK_SIZE (-1) /* Chunk size is illegal or past file size. */
|
||||
#define WAV_ERR_FILE_TYPE (-2) /* Not a WAV file. */
|
||||
#define WAV_ERR_ILLEGAL_VALUE (-3) /* Illegal or unsupported value. Eg. 927 bits/sample */
|
||||
#define WAV_ERR_FORMAT_TYPE (-4) /* Unsupported format, eg. compressed. */
|
||||
#define WAV_ERR_TRUNCATED (-5) /* End of file missing. */
|
||||
|
||||
/* WAV PCM data format ID */
|
||||
#define WAVE_FORMAT_PCM (1)
|
||||
#define WAVE_FORMAT_IMA_ADPCM (0x0011)
|
||||
|
||||
|
||||
typedef struct WAV_Writer_s
|
||||
{
|
||||
FILE *fid;
|
||||
/* Offset in file for data size. */
|
||||
int dataSizeOffset;
|
||||
int dataSize;
|
||||
} WAV_Writer;
|
||||
|
||||
/*********************************************************************************
|
||||
* Open named file and write WAV header to the file.
|
||||
* The header includes the DATA chunk type and size.
|
||||
* Returns number of bytes written to file or negative error code.
|
||||
*/
|
||||
long Audio_WAV_OpenWriter( WAV_Writer *writer, const char *fileName, int frameRate, int samplesPerFrame );
|
||||
|
||||
/*********************************************************************************
|
||||
* Write to the data chunk portion of a WAV file.
|
||||
* Returns bytes written or negative error code.
|
||||
*/
|
||||
long Audio_WAV_WriteShorts( WAV_Writer *writer,
|
||||
short *samples,
|
||||
int numSamples
|
||||
);
|
||||
|
||||
/*********************************************************************************
|
||||
* Close WAV file.
|
||||
* Update chunk sizes so it can be read by audio applications.
|
||||
*/
|
||||
long Audio_WAV_CloseWriter( WAV_Writer *writer );
|
||||
|
||||
#ifdef __cplusplus
|
||||
};
|
||||
#endif
|
||||
|
||||
#endif /* _WAV_WRITER_H */
|
||||
/*
|
||||
* PortAudio Portable Real-Time Audio Library
|
||||
* Latest Version at: http://www.portaudio.com
|
||||
*
|
||||
* Copyright (c) 1999-2010 Phil Burk and Ross Bencina
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
#ifndef _WAV_WRITER_H
|
||||
#define _WAV_WRITER_H
|
||||
|
||||
/*
|
||||
* WAV file writer.
|
||||
*
|
||||
* Author: Phil Burk
|
||||
*/
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
/* Define WAV Chunk and FORM types as 4 byte integers. */
|
||||
#define RIFF_ID (('R'<<24) | ('I'<<16) | ('F'<<8) | 'F')
|
||||
#define WAVE_ID (('W'<<24) | ('A'<<16) | ('V'<<8) | 'E')
|
||||
#define FMT_ID (('f'<<24) | ('m'<<16) | ('t'<<8) | ' ')
|
||||
#define DATA_ID (('d'<<24) | ('a'<<16) | ('t'<<8) | 'a')
|
||||
#define FACT_ID (('f'<<24) | ('a'<<16) | ('c'<<8) | 't')
|
||||
|
||||
/* Errors returned by Audio_ParseSampleImage_WAV */
|
||||
#define WAV_ERR_CHUNK_SIZE (-1) /* Chunk size is illegal or past file size. */
|
||||
#define WAV_ERR_FILE_TYPE (-2) /* Not a WAV file. */
|
||||
#define WAV_ERR_ILLEGAL_VALUE (-3) /* Illegal or unsupported value. Eg. 927 bits/sample */
|
||||
#define WAV_ERR_FORMAT_TYPE (-4) /* Unsupported format, eg. compressed. */
|
||||
#define WAV_ERR_TRUNCATED (-5) /* End of file missing. */
|
||||
|
||||
/* WAV PCM data format ID */
|
||||
#define WAVE_FORMAT_PCM (1)
|
||||
#define WAVE_FORMAT_IMA_ADPCM (0x0011)
|
||||
|
||||
|
||||
typedef struct WAV_Writer_s
|
||||
{
|
||||
FILE *fid;
|
||||
/* Offset in file for data size. */
|
||||
int dataSizeOffset;
|
||||
int dataSize;
|
||||
} WAV_Writer;
|
||||
|
||||
/*********************************************************************************
|
||||
* Open named file and write WAV header to the file.
|
||||
* The header includes the DATA chunk type and size.
|
||||
* Returns number of bytes written to file or negative error code.
|
||||
*/
|
||||
long Audio_WAV_OpenWriter( WAV_Writer *writer, const char *fileName, int frameRate, int samplesPerFrame );
|
||||
|
||||
/*********************************************************************************
|
||||
* Write to the data chunk portion of a WAV file.
|
||||
* Returns bytes written or negative error code.
|
||||
*/
|
||||
long Audio_WAV_WriteShorts( WAV_Writer *writer,
|
||||
short *samples,
|
||||
int numSamples
|
||||
);
|
||||
|
||||
/*********************************************************************************
|
||||
* Close WAV file.
|
||||
* Update chunk sizes so it can be read by audio applications.
|
||||
*/
|
||||
long Audio_WAV_CloseWriter( WAV_Writer *writer );
|
||||
|
||||
#ifdef __cplusplus
|
||||
};
|
||||
#endif
|
||||
|
||||
#endif /* _WAV_WRITER_H */
|
||||
|
||||
Reference in New Issue
Block a user