diff options
Diffstat (limited to 'pd/portaudio_v18/pa_tests/patest_wire.c')
-rw-r--r-- | pd/portaudio_v18/pa_tests/patest_wire.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/pd/portaudio_v18/pa_tests/patest_wire.c b/pd/portaudio_v18/pa_tests/patest_wire.c new file mode 100644 index 00000000..7ea64bb4 --- /dev/null +++ b/pd/portaudio_v18/pa_tests/patest_wire.c @@ -0,0 +1,176 @@ +/* + * $Id: patest_wire.c,v 1.2.4.3 2003/04/10 23:09:40 philburk Exp $ + * patest_wire.c + * + * Pass input directly to output. + * Note that some HW devices, for example many ISA audio cards + * on PCs, do NOT support full duplex! For a PC, you normally need + * a PCI based audio card such as the SBLive. + * + * Author: Phil Burk http://www.softsynth.com + * + * This program uses the PortAudio Portable Audio Library. + * For more information see: http://www.portaudio.com + * Copyright (c) 1999-2000 Ross Bencina and Phil Burk + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files + * (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, + * publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * Any person wishing to distribute modifications to the Software is + * requested to send the modifications to the original developer so that + * they can be incorporated into the canonical version. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF + * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + */ +#include <stdio.h> +#include <math.h> +#include "portaudio.h" + +#define INPUT_DEVICE Pa_GetDefaultInputDeviceID() +#define OUTPUT_DEVICE Pa_GetDefaultOutputDeviceID() + +/* +** Note that many of the older ISA sound cards on PCs do NOT support +** full duplex audio (simultaneous record and playback). +** And some only support full duplex at lower sample rates. +*/ +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (64) + +#if 1 +#define PA_SAMPLE_TYPE paFloat32 +typedef float SAMPLE; +#else +#define PA_SAMPLE_TYPE paInt16 +typedef short SAMPLE; +#endif +static int wireCallback( void *inputBuffer, void *outputBuffer, + unsigned long framesPerBuffer, + PaTimestamp outTime, void *userData ); + +/* This routine will be called by the PortAudio engine when audio is needed. +** It may be called at interrupt level on some machines so don't do anything +** that could mess up the system like calling malloc() or free(). +*/ +static int wireCallback( void *inputBuffer, void *outputBuffer, + unsigned long framesPerBuffer, + PaTimestamp outTime, void *userData ) +{ + SAMPLE *out = (SAMPLE*)outputBuffer; + SAMPLE *in = (SAMPLE*)inputBuffer; + unsigned int i; + (void) outTime; + int samplesPerFrame; + int numSamples; + + samplesPerFrame = (int) userData; + numSamples = framesPerBuffer * samplesPerFrame; + + /* This may get called with NULL inputBuffer during initial setup. */ + if( inputBuffer == NULL ) + { + for( i=0; i<numSamples; i++ ) + { + *out++ = 0; + } + } + else + { + for( i=0; i<numSamples; i++ ) + { + *out++ = *in++; + } + } + + return 0; +} + + +/*******************************************************************/ +int main(void); +int main(void) +{ + PortAudioStream *stream; + PaError err; + const PaDeviceInfo *inputInfo; + const PaDeviceInfo *outputInfo; + int numChannels; + + err = Pa_Initialize(); + if( err != paNoError ) goto error; + + printf("PortAudio Test: input device ID = %d\n", INPUT_DEVICE ); + printf("PortAudio Test: output device ID = %d\n", OUTPUT_DEVICE ); + + /* Use as many channels aspossible. */ + inputInfo = Pa_GetDeviceInfo( INPUT_DEVICE ); + outputInfo = Pa_GetDeviceInfo( OUTPUT_DEVICE ); + /* Use smaller count. */ + numChannels = (inputInfo->maxInputChannels < outputInfo->maxOutputChannels) ? + inputInfo->maxInputChannels : outputInfo->maxOutputChannels; + + printf("maxInputChannels channels = %d\n", inputInfo->maxInputChannels ); + printf("maxOutputChannels channels = %d\n", outputInfo->maxOutputChannels ); + if( numChannels > 0 ) + { + printf("Using %d channels.\n", numChannels ); + + err = Pa_OpenStream( + &stream, + INPUT_DEVICE, + numChannels, + PA_SAMPLE_TYPE, + NULL, + OUTPUT_DEVICE, + numChannels, + PA_SAMPLE_TYPE, + NULL, + SAMPLE_RATE, + FRAMES_PER_BUFFER, /* frames per buffer */ + 0, /* number of buffers, if zero then use default minimum */ + paClipOff, /* we won't output out of range samples so don't bother clipping them */ + wireCallback, + (void *) numChannels ); /* pass numChannels to callback */ + if( err != paNoError ) goto error; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + printf("Full duplex sound test in progress.\n"); + printf("Hit ENTER to exit test.\n"); fflush(stdout); + getchar(); + + printf("Closing stream.\n"); + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + } + else + { + printf("Sorry, not enough channels.\n"); + } + Pa_Terminate(); + + printf("Full duplex sound test complete.\n"); fflush(stdout); + return 0; +error: + Pa_Terminate(); + 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 ) ); + return -1; +} |