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Move library tree where it belongs
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ra
186
lib-src/portaudio-v19/test/debug_multi_in.c
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186
lib-src/portaudio-v19/test/debug_multi_in.c
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/*
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* $Id: debug_multi_in.c,v 1.8 2008-12-31 15:38:36 richardash1981 Exp $
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* debug_multi_in.c
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* Pass output from each of multiple channels
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* to a stereo output using the Portable Audio api.
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* Hacked test for debugging PA.
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*
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* Author: Phil Burk http://www.softsynth.com
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*
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* This program uses the PortAudio Portable Audio Library.
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* For more information see: http://www.portaudio.com
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* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The text above constitutes the entire PortAudio license; however,
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* the PortAudio community also makes the following non-binding requests:
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version. It is also
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* requested that these non-binding requests be included along with the
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* license above.
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*/
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#include <stdio.h>
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#include <math.h>
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#include <string.h>
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#include "portaudio.h"
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//#define INPUT_DEVICE_NAME ("EWS88 MT Interleaved Rec")
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#define OUTPUT_DEVICE (Pa_GetDefaultOutputDeviceID())
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//#define OUTPUT_DEVICE (18)
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#define SAMPLE_RATE (22050)
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#define FRAMES_PER_BUFFER (256)
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#define MIN_LATENCY_MSEC (400)
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#define NUM_BUFFERS ((MIN_LATENCY_MSEC * SAMPLE_RATE) / (FRAMES_PER_BUFFER * 1000))
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#ifndef M_PI
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#define M_PI (3.14159265)
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#endif
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typedef struct
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{
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int liveChannel;
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int numChannels;
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}
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paTestData;
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/* This routine will be called by the PortAudio engine when audio is needed.
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** It may called at interrupt level on some machines so don't do anything
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** that could mess up the system like calling malloc() or free().
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*/
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static int patestCallback( void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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PaTimestamp outTime, void *userData )
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{
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paTestData *data = (paTestData*)userData;
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float *out = (float*)outputBuffer;
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float *in = (float*)inputBuffer;
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int i;
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int finished = 0;
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(void) outTime; /* Prevent unused variable warnings. */
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(void) inputBuffer;
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if( in == NULL ) return 0;
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for( i=0; i<(int)framesPerBuffer; i++ )
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{
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/* Copy one channel of input to output. */
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*out++ = in[data->liveChannel];
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*out++ = in[data->liveChannel];
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in += data->numChannels;
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}
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return 0;
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}
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/*******************************************************************/
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int PaFindDeviceByName( const char *name )
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{
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int i;
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int numDevices;
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const PaDeviceInfo *pdi;
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int len = strlen( name );
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PaDeviceID result = paNoDevice;
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numDevices = Pa_CountDevices();
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for( i=0; i<numDevices; i++ )
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{
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pdi = Pa_GetDeviceInfo( i );
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if( strncmp( name, pdi->name, len ) == 0 )
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{
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result = i;
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break;
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}
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}
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return result;
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}
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/*******************************************************************/
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int main(void);
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int main(void)
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{
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PortAudioStream *stream;
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PaError err;
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paTestData data;
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int i;
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PaDeviceID inputDevice;
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const PaDeviceInfo *pdi;
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printf("PortAudio Test: input signal from each channel. %d buffers\n", NUM_BUFFERS );
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data.liveChannel = 0;
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err = Pa_Initialize();
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if( err != paNoError ) goto error;
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#ifdef INPUT_DEVICE_NAME
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printf("Try to use device: %s\n", INPUT_DEVICE_NAME );
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inputDevice = PaFindDeviceByName(INPUT_DEVICE_NAME);
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if( inputDevice == paNoDevice )
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{
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printf("Could not find %s. Using default instead.\n", INPUT_DEVICE_NAME );
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inputDevice = Pa_GetDefaultInputDeviceID();
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}
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#else
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printf("Using default input device.\n");
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inputDevice = Pa_GetDefaultInputDeviceID();
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#endif
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pdi = Pa_GetDeviceInfo( inputDevice );
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if( pdi == NULL )
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{
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printf("Could not get device info!\n");
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goto error;
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}
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data.numChannels = pdi->maxInputChannels;
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printf("Input Device name is %s\n", pdi->name );
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printf("Input Device has %d channels.\n", pdi->maxInputChannels);
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err = Pa_OpenStream(
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&stream,
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inputDevice,
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pdi->maxInputChannels,
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paFloat32, /* 32 bit floating point input */
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NULL,
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OUTPUT_DEVICE,
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2,
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paFloat32, /* 32 bit floating point output */
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NULL,
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SAMPLE_RATE,
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FRAMES_PER_BUFFER, /* frames per buffer */
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NUM_BUFFERS, /* number of buffers, if zero then use default minimum */
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paClipOff, /* we won't output out of range samples so don't bother clipping them */
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patestCallback,
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&data );
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if( err != paNoError ) goto error;
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data.liveChannel = 0;
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err = Pa_StartStream( stream );
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if( err != paNoError ) goto error;
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for( i=0; i<data.numChannels; i++ )
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{
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data.liveChannel = i;
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printf("Channel %d being sent to output. Hit ENTER for next channel.", i );
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fflush(stdout);
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getchar();
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}
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err = Pa_StopStream( stream );
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if( err != paNoError ) goto error;
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err = Pa_CloseStream( stream );
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Pa_Terminate();
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printf("Test finished.\n");
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return err;
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error:
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Pa_Terminate();
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fprintf( stderr, "An error occured while using the portaudio stream\n" );
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fprintf( stderr, "Error number: %d\n", err );
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fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
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return err;
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}
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