diff options
Diffstat (limited to 'pd/src/s_audio_pa.c')
| -rw-r--r-- | pd/src/s_audio_pa.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/pd/src/s_audio_pa.c b/pd/src/s_audio_pa.c new file mode 100644 index 00000000..253b33cd --- /dev/null +++ b/pd/src/s_audio_pa.c @@ -0,0 +1,186 @@ +/* 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 ) ); + +} |