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/************************************************************************
FAUST Architecture File
Copyright (C) 2017 GRAME, Centre National de Creation Musicale
---------------------------------------------------------------------
This Architecture section is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 3 of
the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; If not, see <http://www.gnu.org/licenses/>.
EXCEPTION : As a special exception, you may create a larger work
that contains this FAUST architecture section and distribute
that work under terms of your choice, so long as this FAUST
architecture section is not modified.
************************************************************************
************************************************************************/
#ifndef __sound_player__
#define __sound_player__
#include <sndfile.h>
#include <string>
#include <iostream>
#include "faust/dsp/dsp.h"
#ifdef FAUSTFLOAT
#if (FAUSTFLOAT == float)
#define SND_READ sf_readf_float
#else
#define SND_READ sf_readf_double
#endif
#endif
#define BUFFER_SIZE 512
/**
* LibSndfile based player
*/
class sound_player : public dsp {
private:
SF_INFO fInfo;
SNDFILE* fFile;
std::string fFileName;
int fSamplingFreq;
int fFrames; // File current frame while playing (starts at fInfo.frames, ends at 0)
FAUSTFLOAT** fBuffer; // Buffer of non-interleased frames
// Zones for UI management
FAUSTFLOAT fPlayButton;
FAUSTFLOAT fLoopButton;
FAUSTFLOAT fSpeedSlider;
void playSlice(int count, int src, int dst, FAUSTFLOAT** outputs)
{
for (int i = 0; i < fInfo.channels; i++) {
memcpy(&(outputs[i])[dst], &(fBuffer[i])[src], sizeof(FAUSTFLOAT) * count);
}
}
void clearSlice(int count, int dst, FAUSTFLOAT** outputs)
{
for (int i = 0; i < fInfo.channels; i++) {
memset(&(outputs[i])[dst], 0, sizeof(FAUSTFLOAT) * count);
}
}
public:
sound_player(const std::string& filename)
{
fFileName = filename;
fSamplingFreq = -1;
fFile = sf_open(fFileName.c_str(), SFM_READ, &fInfo);
if (!fFile) {
std::cerr << sf_strerror(fFile) << std::endl;
throw std::bad_alloc();
}
fBuffer = new FAUSTFLOAT*[fInfo.channels];
for (int chan = 0; chan < fInfo.channels; chan++) {
fBuffer[chan] = new FAUSTFLOAT[fInfo.frames];
}
FAUSTFLOAT buffer[BUFFER_SIZE * fInfo.channels];
sf_count_t nbf;
int dst = 0;
do {
// Read buffer
nbf = SND_READ(fFile, buffer, BUFFER_SIZE);
// Deinterleave it
for (int chan = 0; chan < fInfo.channels; chan++) {
for (int frame = 0; frame < nbf; frame++) {
fBuffer[chan][dst + frame] = buffer[frame * fInfo.channels + chan];
}
}
// Move write index
dst += nbf;
} while (nbf == BUFFER_SIZE);
}
virtual ~sound_player()
{
for (int i = 0; i < fInfo.channels; i++) {
delete [] fBuffer[i];
}
delete [] fBuffer;
sf_close(fFile);
}
int getNumInputs() { return 0; }
int getNumOutputs() { return fInfo.channels; }
void buildUserInterface(UI* ui_interface)
{
ui_interface->openVerticalBox("Transport");
ui_interface->addCheckButton("Play", &fPlayButton);
ui_interface->addCheckButton("Loop", &fLoopButton);
ui_interface->addHorizontalSlider("Speed", &fSpeedSlider, FAUSTFLOAT(1), FAUSTFLOAT(0.5), FAUSTFLOAT(2), FAUSTFLOAT(0.1));
ui_interface->closeBox();
}
int getSampleRate() { return fSamplingFreq; }
static void classInit(int samplingFreq) {}
void init(int samplingFreq)
{
classInit(samplingFreq);
instanceInit(samplingFreq);
}
void instanceInit(int samplingFreq)
{
instanceConstants(samplingFreq);
instanceResetUserInterface();
instanceClear();
}
void instanceConstants(int samplingFreq)
{
fSamplingFreq = samplingFreq;
}
void instanceResetUserInterface()
{
fPlayButton = FAUSTFLOAT(0);
fLoopButton = FAUSTFLOAT(0);
fSpeedSlider = FAUSTFLOAT(1);
}
void instanceClear()
{
fFrames = fInfo.frames;
}
sound_player* clone() { return new sound_player(fFileName); }
void metadata(Meta* m)
{
m->declare("name", fFileName.c_str());
}
void compute(int count, FAUSTFLOAT** inputs, FAUSTFLOAT** outputs)
{
if (fPlayButton == FAUSTFLOAT(1)) {
int rcount = std::min(count, fFrames);
playSlice(rcount, fInfo.frames - fFrames, 0, outputs);
if (rcount < count) {
if (fLoopButton == FAUSTFLOAT(1)) {
// Loop buffer
playSlice(count - rcount, 0, rcount, outputs);
fFrames = fInfo.frames - (count - rcount);
} else {
// Otherwise clear end of buffer and stops
clearSlice(count - rcount, rcount, outputs);
fFrames = fInfo.frames;
fPlayButton = 0;
}
} else {
fFrames -= count;
}
} else {
// Clear output
clearSlice(count, 0, outputs);
}
}
};
#endif
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