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/* Copyright (c) 2001 Miller Puckette and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* this file calls Ross Bencina's and Phil Burk's Portaudio package. It's
the main way in for Mac OS and, with Michael Casey's help, also into
ASIO in Windows. */
#include "m_pd.h"
#include "s_stuff.h"
#include <stdio.h>
#include <stdlib.h>
#include "portaudio.h"
#include "pablio_pd.h"
#ifdef MACOSX
#define Pa_GetDefaultInputDevice Pa_GetDefaultInputDeviceID
#define Pa_GetDefaultOutputDevice Pa_GetDefaultOutputDeviceID
#endif
/* public interface declared in m_imp.h */
/* implementation */
static PABLIO_Stream *pa_stream;
static int pa_inchans, pa_outchans;
static float *pa_soundin, *pa_soundout;
#define MAX_PA_CHANS 32
#define MAX_SAMPLES_PER_FRAME MAX_PA_CHANS * DEFDACBLKSIZE
int pa_open_audio(int inchans, int outchans, int rate, t_sample *soundin,
t_sample *soundout, int framesperbuf, int nbuffers,
int indeviceno, int outdeviceno)
{
PaError err;
static int initialized;
if (!initialized)
{
/* Initialize PortAudio */
int err = Pa_Initialize();
if ( err != paNoError )
{
fprintf( stderr,
"Error number %d occured initializing portaudio\n",
err);
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
return (1);
}
initialized = 1;
}
/* post("in %d out %d rate %d device %d", inchans, outchans, rate, deviceno); */
if (inchans != 0 && outchans != 0 && inchans != outchans)
error("portaudio: number of input and output channels must match");
if (sys_verbose)
post("portaudio: opening for %d channels in, %d out",
inchans, outchans);
if (inchans > MAX_PA_CHANS)
{
post("input channels reduced to maximum %d", MAX_PA_CHANS);
inchans = MAX_PA_CHANS;
}
if (outchans > MAX_PA_CHANS)
{
post("output channels reduced to maximum %d", MAX_PA_CHANS);
outchans = MAX_PA_CHANS;
}
if (indeviceno < 0)
indeviceno = Pa_GetDefaultInputDevice();
if (outdeviceno < 0)
outdeviceno = Pa_GetDefaultOutputDevice();
fprintf(stderr, "input device %d, output device %d\n",
indeviceno, outdeviceno);
if (inchans && outchans)
err = OpenAudioStream( &pa_stream, rate, paFloat32,
PABLIO_READ_WRITE, inchans, framesperbuf, nbuffers,
indeviceno, outdeviceno);
else if (inchans)
err = OpenAudioStream( &pa_stream, rate, paFloat32,
PABLIO_READ, inchans, framesperbuf, nbuffers,
indeviceno, outdeviceno);
else if (outchans)
err = OpenAudioStream( &pa_stream, rate, paFloat32,
PABLIO_WRITE, outchans, framesperbuf, nbuffers,
indeviceno, outdeviceno);
else err = 0;
if ( err != paNoError )
{
fprintf( stderr, "Error number %d occured opening portaudio stream\n",
err);
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
Pa_Terminate();
return (1);
}
else if (sys_verbose)
post("... opened OK.");
pa_inchans = inchans;
pa_outchans = outchans;
pa_soundin = soundin;
pa_soundout = soundout;
return (0);
}
void pa_close_audio( void)
{
if (pa_inchans || pa_outchans)
CloseAudioStream( pa_stream );
pa_inchans = pa_outchans = 0;
}
int pa_send_dacs(void)
{
float samples[MAX_SAMPLES_PER_FRAME], *fp1, *fp2;
int i, j;
double timebefore;
timebefore = sys_getrealtime();
if (pa_inchans)
{
ReadAudioStream(pa_stream, samples, DEFDACBLKSIZE);
for (j = 0, fp1 = pa_soundin; j < pa_inchans; j++, fp1 += DEFDACBLKSIZE)
for (i = 0, fp2 = samples + j; i < DEFDACBLKSIZE; i++,
fp2 += pa_inchans)
{
fp1[i] = *fp2;
}
}
if (pa_outchans)
{
for (j = 0, fp1 = pa_soundout; j < pa_outchans; j++,
fp1 += DEFDACBLKSIZE)
for (i = 0, fp2 = samples + j; i < DEFDACBLKSIZE; i++,
fp2 += pa_outchans)
{
*fp2 = fp1[i];
fp1[i] = 0;
}
WriteAudioStream(pa_stream, samples, DEFDACBLKSIZE);
}
if (sys_getrealtime() > timebefore + 0.002)
return (SENDDACS_SLEPT);
else return (SENDDACS_YES);
}
void pa_listdevs(void) /* lifted from pa_devs.c in portaudio */
{
int i,j;
int numDevices;
const PaDeviceInfo *pdi;
PaError err;
Pa_Initialize();
numDevices = Pa_CountDevices();
if( numDevices < 0 )
{
fprintf(stderr, "ERROR: Pa_CountDevices returned 0x%x\n", numDevices );
err = numDevices;
goto error;
}
fprintf(stderr, "Audio Devices:\n");
for( i=0; i<numDevices; i++ )
{
pdi = Pa_GetDeviceInfo( i );
fprintf(stderr, "device %d:", i+1 );
fprintf(stderr, " %s;", pdi->name );
fprintf(stderr, "%d inputs, ", pdi->maxInputChannels );
fprintf(stderr, "%d outputs", pdi->maxOutputChannels );
if ( i == Pa_GetDefaultInputDevice() )
fprintf(stderr, " (Default Input)");
if ( i == Pa_GetDefaultOutputDevice() )
fprintf(stderr, " (Default Output)");
fprintf(stderr, "\n");
}
fprintf(stderr, "\n");
return;
error:
fprintf( stderr, "An error occured while using the portaudio stream\n" );
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
}
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