-/************************************************************************
-
- IMPORTANT NOTE : this file contains two clearly delimited sections :
- the ARCHITECTURE section (in two parts) and the USER section. Each section
- is governed by its own copyright and license. Please check individually
- each section for license and copyright information.
-*************************************************************************/
-
-/*******************BEGIN ARCHITECTURE SECTION (part 1/2)****************/
-
-/************************************************************************
- FAUST Architecture File
- Copyright (C) 2003-2011 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 __portaudio_dsp__
-#define __portaudio_dsp__
-
-#include <stdio.h>
-#include <assert.h>
-#include <portaudio.h>
-
-#include "audio.h"
-#include "dsp.h"
-
-#define max(x,y) (((x)>(y)) ? (x) : (y))
-
-static int audioCallback(const void *ibuf, void *obuf, unsigned long frames, const PaStreamCallbackTimeInfo*, PaStreamCallbackFlags, void * drv);
-//----------------------------------------------------------------------------
-static void pa_error(int err)
-{
- if (err != paNoError) {
- printf( "PortAudio error: %s\n", Pa_GetErrorText( err ) );
- }
-}
-
-/******************************************************************************
-*******************************************************************************
-
- PORT AUDIO INTERFACE
-
-*******************************************************************************
-*******************************************************************************/
-class portaudio : public audio {
-
- dsp* fDsp;
- PaStream* fAudioStream;
- long fSampleRate, fBufferSize;
- //----------------------------------------------------------------------------
- // number of physical input and output channels of the PA device
- //----------------------------------------------------------------------------
- int fDevNumInChans;
- int fDevNumOutChans;
-
- //----------------------------------------------------------------------------
- // tables of noninterleaved input and output channels for FAUST
- //----------------------------------------------------------------------------
- float* fInChannel[256];
- float* fOutChannel[256];
-
- //----------------------------------------------------------------------------
- // allocated the noninterleaved input and output channels for FAUST
- //----------------------------------------------------------------------------
- void allocChannels (int size, int numInChan, int numOutChan)
- {
- assert (numInChan < 256);
- assert (numOutChan < 256);
-
- for (int i = 0; i < numInChan; i++) {
- fInChannel[i] = (float*) calloc (size, sizeof(float));
- for (int j = 0; j < size; j++)
- fInChannel[i][j] = 0.0;
- }
-
- for (int i = 0; i < numOutChan; i++) {
- fOutChannel[i] = (float*) calloc (size, sizeof(float));
- for (int j = 0; j < size; j++)
- fOutChannel[i][j] = 0.0;
- }
- }
-
- public:
- portaudio(long srate, long bsize) : fDsp(0), fAudioStream(0),
- fSampleRate(srate), fBufferSize(bsize), fDevNumInChans(0), fDevNumOutChans(0) {}
- virtual ~portaudio() { stop(); }
-
- virtual bool init(const char* name, dsp* DSP){
- fDsp = DSP;
- pa_error(Pa_Initialize());
-
- const PaDeviceInfo* idev = Pa_GetDeviceInfo(Pa_GetDefaultInputDevice());
- const PaDeviceInfo* odev = Pa_GetDeviceInfo(Pa_GetDefaultOutputDevice());
-
- fDevNumInChans = (fDsp->getNumInputs() > 0) ? idev->maxInputChannels : 0 ;
- fDevNumOutChans = (fDsp->getNumOutputs() > 0) ? odev->maxOutputChannels : 0;
-
- PaStreamParameters inputParameters;
- PaStreamParameters outputParameters;
-
- inputParameters.device = Pa_GetDefaultInputDevice();
- inputParameters.sampleFormat = paFloat32;
- inputParameters.channelCount = fDevNumInChans;
- inputParameters.hostApiSpecificStreamInfo = 0;
-
- outputParameters.device = Pa_GetDefaultOutputDevice();
- outputParameters.sampleFormat = paFloat32;
- outputParameters.channelCount = fDevNumOutChans;
- outputParameters.hostApiSpecificStreamInfo = 0;
-
- PaError err;
- if ((err = Pa_IsFormatSupported(
- ((fDevNumInChans > 0) ? &inputParameters : 0),
- ((fDevNumOutChans > 0) ? &outputParameters : 0), fSampleRate)) != 0) {
- printf("stream format is not supported err = %d\n", err);
- return false;
- }
-
- allocChannels(fBufferSize, max(fDevNumInChans, fDsp->getNumInputs()), max(fDevNumOutChans, fDsp->getNumOutputs()));
- fDsp->init(fSampleRate);
- return true;
- }
-
- virtual bool start() {
- pa_error(Pa_OpenDefaultStream(&fAudioStream, fDevNumInChans, fDevNumOutChans, paFloat32, fSampleRate, fBufferSize, audioCallback, this));
- Pa_StartStream(fAudioStream);
- return true;
- }
-
- virtual void stop() {
- if (fAudioStream) {
- Pa_StopStream (fAudioStream);
- Pa_CloseStream(fAudioStream);
- fAudioStream = 0;
- }
- }
-
- int processAudio(const float *ibuf, float *obuf, unsigned long frames) {
- const float* fInputBuffer = ibuf;
- float* fOutputBuffer = obuf;
-
- // split input samples
- for (unsigned long s = 0; s < frames; s++) {
- for (int c = 0; c < fDevNumInChans; c++) {
- fInChannel[c][s] = fInputBuffer[c + s*fDevNumInChans];
- }
- }
-
- // process samples
- fDsp->compute(frames, fInChannel, fOutChannel);
-
- // merge output samples
- for (unsigned long s = 0; s < frames; s++) {
- for (int c = 0; c < fDevNumOutChans; c++) {
- fOutputBuffer[c + s*fDevNumOutChans] = fOutChannel[c][s];
- }
- }
- return 0;
- }
-};
-
-//----------------------------------------------------------------------------
-// Port Audio Callback
-//----------------------------------------------------------------------------
-static int audioCallback(const void *ibuf, void *obuf, unsigned long frames, const PaStreamCallbackTimeInfo*, PaStreamCallbackFlags, void * drv)
-{
- portaudio * pa = (portaudio*) drv;
- return pa->processAudio ((const float*)ibuf, (float*)obuf, frames);
-}
-
-#endif
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