summaryrefslogtreecommitdiff
path: root/libs/appleutility/CoreAudio/PublicUtility/CASpectralProcessor.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'libs/appleutility/CoreAudio/PublicUtility/CASpectralProcessor.cpp')
-rw-r--r--libs/appleutility/CoreAudio/PublicUtility/CASpectralProcessor.cpp96
1 files changed, 48 insertions, 48 deletions
diff --git a/libs/appleutility/CoreAudio/PublicUtility/CASpectralProcessor.cpp b/libs/appleutility/CoreAudio/PublicUtility/CASpectralProcessor.cpp
index ffb2da8a83..85f14cb4ab 100644
--- a/libs/appleutility/CoreAudio/PublicUtility/CASpectralProcessor.cpp
+++ b/libs/appleutility/CoreAudio/PublicUtility/CASpectralProcessor.cpp
@@ -2,14 +2,14 @@
File: CASpectralProcessor.cpp
Abstract: CASpectralProcessor.h
Version: 1.1
-
+
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
Inc. ("Apple") in consideration of your agreement to the following
terms, and your use, installation, modification or redistribution of
this Apple software constitutes acceptance of these terms. If you do
not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
-
+
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
@@ -25,13 +25,13 @@
implied, are granted by Apple herein, including but not limited to any
patent rights that may be infringed by your derivative works or by other
works in which the Apple Software may be incorporated.
-
+
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
-
+
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
@@ -40,11 +40,11 @@
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
-
+
Copyright (C) 2014 Apple Inc. All Rights Reserved.
-
+
*/
-
+
//#include "AudioFormulas.h"
#include "CASpectralProcessor.h"
#include "CABitOperations.h"
@@ -57,23 +57,23 @@
CASpectralProcessor::CASpectralProcessor(UInt32 inFFTSize, UInt32 inHopSize, UInt32 inNumChannels, UInt32 inMaxFrames)
: mFFTSize(inFFTSize), mHopSize(inHopSize), mNumChannels(inNumChannels), mMaxFrames(inMaxFrames),
- mLog2FFTSize(Log2Ceil(mFFTSize)),
+ mLog2FFTSize(Log2Ceil(mFFTSize)),
mFFTMask(mFFTSize - 1),
mFFTByteSize(mFFTSize * sizeof(Float32)),
mIOBufSize(NextPowerOfTwo(mFFTSize + mMaxFrames)),
mIOMask(mIOBufSize - 1),
mInputSize(0),
- mInputPos(0), mOutputPos(-mFFTSize & mIOMask),
+ mInputPos(0), mOutputPos(-mFFTSize & mIOMask),
mInFFTPos(0), mOutFFTPos(0),
mSpectralFunction(0), mUserData(0)
{
mWindow.alloc(mFFTSize, false);
SineWindow(); // set default window.
-
+
mChannels.alloc(mNumChannels);
mSpectralBufferList.allocBytes(OFFSETOF(SpectralBufferList, mDSPSplitComplex[mNumChannels]), true);
mSpectralBufferList->mNumberSpectra = mNumChannels;
- for (UInt32 i = 0; i < mNumChannels; ++i)
+ for (UInt32 i = 0; i < mNumChannels; ++i)
{
mChannels[i].mInputBuf.alloc(mIOBufSize, true);
mChannels[i].mOutputBuf.alloc(mIOBufSize, true);
@@ -84,7 +84,7 @@ CASpectralProcessor::CASpectralProcessor(UInt32 inFFTSize, UInt32 inHopSize, UIn
}
mFFTSetup = vDSP_create_fftsetup (mLog2FFTSize, FFT_RADIX2);
-
+
}
CASpectralProcessor::~CASpectralProcessor()
@@ -101,8 +101,8 @@ void CASpectralProcessor::Reset()
mOutputPos = -mFFTSize & mIOMask;
mInFFTPos = 0;
mOutFFTPos = 0;
-
- for (UInt32 i = 0; i < mNumChannels; ++i)
+
+ for (UInt32 i = 0; i < mNumChannels; ++i)
{
memset(mChannels[i].mInputBuf(), 0, mIOBufSize * sizeof(Float32));
memset(mChannels[i].mOutputBuf(), 0, mIOBufSize * sizeof(Float32));
@@ -113,13 +113,13 @@ void CASpectralProcessor::Reset()
const double two_pi = 2. * M_PI;
void CASpectralProcessor::HanningWindow()
-{
+{
// this is also vector optimized
double w = two_pi / (double)(mFFTSize - 1);
for (UInt32 i = 0; i < mFFTSize; ++i)
{
- mWindow[i] = (0.5 - 0.5 * cos(w * (double)i));
+ mWindow[i] = (0.5 - 0.5 * cos(w * (double)i));
}
}
@@ -136,9 +136,9 @@ void CASpectralProcessor::Process(UInt32 inNumFrames, AudioBufferList* inInput,
{
// copy from buffer list to input buffer
CopyInput(inNumFrames, inInput);
-
+
// if enough input to process, then process.
- while (mInputSize >= mFFTSize)
+ while (mInputSize >= mFFTSize)
{
CopyInputToFFT(); // copy from input buffer to fft buffer
DoWindowing();
@@ -170,18 +170,18 @@ void CASpectralProcessor::CopyInput(UInt32 inNumFrames, AudioBufferList* inInput
{
UInt32 numBytes = inNumFrames * sizeof(Float32);
UInt32 firstPart = mIOBufSize - mInputPos;
-
+
if (firstPart < inNumFrames) {
UInt32 firstPartBytes = firstPart * sizeof(Float32);
UInt32 secondPartBytes = numBytes - firstPartBytes;
- for (UInt32 i=0; i<mNumChannels; ++i) {
+ for (UInt32 i=0; i<mNumChannels; ++i) {
memcpy(mChannels[i].mInputBuf + mInputPos, inInput->mBuffers[i].mData, firstPartBytes);
memcpy(mChannels[i].mInputBuf, (UInt8*)inInput->mBuffers[i].mData + firstPartBytes, secondPartBytes);
}
} else {
UInt32 numBytes = inNumFrames * sizeof(Float32);
- for (UInt32 i=0; i<mNumChannels; ++i) {
+ for (UInt32 i=0; i<mNumChannels; ++i) {
memcpy(mChannels[i].mInputBuf + mInputPos, inInput->mBuffers[i].mData, numBytes);
}
}
@@ -221,7 +221,7 @@ void CASpectralProcessor::PrintSpectralBufferList()
UInt32 half = mFFTSize >> 1;
for (UInt32 i=0; i<mNumChannels; ++i) {
DSPSplitComplex &freqData = mSpectralBufferList->mDSPSplitComplex[i];
-
+
for (UInt32 j=0; j<half; j++){
printf(" bin[%d]: %lf + %lfi\n", (int) j, freqData.realp[j], freqData.imagp[j]);
}
@@ -277,7 +277,7 @@ void CASpectralProcessor::DoFwdFFT()
{
//printf("->DoFwdFFT %g %g\n", mChannels[0].mFFTBuf()[0], mChannels[0].mFFTBuf()[200]);
UInt32 half = mFFTSize >> 1;
- for (UInt32 i=0; i<mNumChannels; ++i)
+ for (UInt32 i=0; i<mNumChannels; ++i)
{
vDSP_ctoz((DSPComplex*)mChannels[i].mFFTBuf(), 2, &mSpectralBufferList->mDSPSplitComplex[i], 1, half);
vDSP_fft_zrip(mFFTSetup, &mSpectralBufferList->mDSPSplitComplex[i], 1, mLog2FFTSize, FFT_FORWARD);
@@ -289,10 +289,10 @@ void CASpectralProcessor::DoInvFFT()
{
//printf("->DoInvFFT %g %g\n", mChannels[0].mFFTBuf()[0], mChannels[0].mFFTBuf()[200]);
UInt32 half = mFFTSize >> 1;
- for (UInt32 i=0; i<mNumChannels; ++i)
+ for (UInt32 i=0; i<mNumChannels; ++i)
{
vDSP_fft_zrip(mFFTSetup, &mSpectralBufferList->mDSPSplitComplex[i], 1, mLog2FFTSize, FFT_INVERSE);
- vDSP_ztoc(&mSpectralBufferList->mDSPSplitComplex[i], 1, (DSPComplex*)mChannels[i].mFFTBuf(), 2, half);
+ vDSP_ztoc(&mSpectralBufferList->mDSPSplitComplex[i], 1, (DSPComplex*)mChannels[i].mFFTBuf(), 2, half);
float scale = 0.5 / mFFTSize;
vDSP_vsmul(mChannels[i].mFFTBuf(), 1, &scale, mChannels[i].mFFTBuf(), 1, mFFTSize );
}
@@ -301,7 +301,7 @@ void CASpectralProcessor::DoInvFFT()
void CASpectralProcessor::SetSpectralFunction(SpectralFunction inFunction, void* inUserData)
{
- mSpectralFunction = inFunction;
+ mSpectralFunction = inFunction;
mUserData = inUserData;
}
@@ -313,29 +313,29 @@ void CASpectralProcessor::ProcessSpectrum(UInt32 inFFTSize, SpectralBufferList*
#pragma mark ___Utility___
-void CASpectralProcessor::GetMagnitude(AudioBufferList* list, Float32* min, Float32* max)
-{
- UInt32 half = mFFTSize >> 1;
+void CASpectralProcessor::GetMagnitude(AudioBufferList* list, Float32* min, Float32* max)
+{
+ UInt32 half = mFFTSize >> 1;
for (UInt32 i=0; i<mNumChannels; ++i) {
- DSPSplitComplex &freqData = mSpectralBufferList->mDSPSplitComplex[i];
-
+ DSPSplitComplex &freqData = mSpectralBufferList->mDSPSplitComplex[i];
+
Float32* b = (Float32*) list->mBuffers[i].mData;
-
- vDSP_zvabs(&freqData,1,b,1,half);
-
- vDSP_maxmgv(b, 1, &max[i], half);
- vDSP_minmgv(b, 1, &min[i], half);
-
- }
+
+ vDSP_zvabs(&freqData,1,b,1,half);
+
+ vDSP_maxmgv(b, 1, &max[i], half);
+ vDSP_minmgv(b, 1, &min[i], half);
+
+ }
}
void CASpectralProcessor::GetFrequencies(Float32* freqs, Float32 sampleRate)
{
- UInt32 half = mFFTSize >> 1;
+ UInt32 half = mFFTSize >> 1;
for (UInt32 i=0; i< half; i++){
- freqs[i] = ((Float32)(i))*sampleRate/((Float32)mFFTSize);
+ freqs[i] = ((Float32)(i))*sampleRate/((Float32)mFFTSize);
}
}
@@ -344,10 +344,10 @@ bool CASpectralProcessor::ProcessForwards(UInt32 inNumFrames, AudioBufferList* i
{
// copy from buffer list to input buffer
CopyInput(inNumFrames, inInput);
-
+
bool processed = false;
// if enough input to process, then process.
- while (mInputSize >= mFFTSize)
+ while (mInputSize >= mFFTSize)
{
CopyInputToFFT(); // copy from input buffer to fft buffer
DoWindowing();
@@ -355,21 +355,21 @@ bool CASpectralProcessor::ProcessForwards(UInt32 inNumFrames, AudioBufferList* i
ProcessSpectrum(mFFTSize, mSpectralBufferList()); // here you would copy the fft results out to a buffer indicated in mUserData, say for sonogram drawing
processed = true;
}
-
+
return processed;
}
bool CASpectralProcessor::ProcessBackwards(UInt32 inNumFrames, AudioBufferList* outOutput)
-{
-
+{
+
ProcessSpectrum(mFFTSize, mSpectralBufferList());
DoInvFFT();
DoWindowing();
- OverlapAddOutput();
-
+ OverlapAddOutput();
+
// copy from output buffer to buffer list
CopyOutput(inNumFrames, outOutput);
-
+
return true;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-28 04:59:05 +0000