285 lines
9.8 KiB
C
285 lines
9.8 KiB
C
/** @file patest_wire.c
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@brief Pass input directly to output.
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Note that some HW devices, for example many ISA audio cards
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on PCs, do NOT support full duplex! For a PC, you normally need
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a PCI based audio card such as the SBLive.
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@author Phil Burk http://www.softsynth.com
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While adapting to V19-API, I excluded configs with framesPerCallback=0
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because of an assert in file pa_common/pa_process.c. Pieter, Oct 9, 2003.
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*/
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/*
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* $Id: patest_wire.c,v 1.1 2006/06/10 21:30:57 dmazzoni Exp $
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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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* 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.
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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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#include <stdio.h>
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#include <math.h>
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#include "portaudio.h"
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#define SAMPLE_RATE (44100)
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typedef struct WireConfig_s
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{
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int isInputInterleaved;
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int isOutputInterleaved;
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int numInputChannels;
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int numOutputChannels;
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int framesPerCallback;
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} WireConfig_t;
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#define USE_FLOAT_INPUT (1)
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#define USE_FLOAT_OUTPUT (1)
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/* Latencies set to defaults. */
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#if USE_FLOAT_INPUT
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#define INPUT_FORMAT paFloat32
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typedef float INPUT_SAMPLE;
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#else
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#define INPUT_FORMAT paInt16
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typedef short INPUT_SAMPLE;
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#endif
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#if USE_FLOAT_OUTPUT
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#define OUTPUT_FORMAT paFloat32
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typedef float OUTPUT_SAMPLE;
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#else
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#define OUTPUT_FORMAT paInt16
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typedef short OUTPUT_SAMPLE;
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#endif
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double gInOutScaler = 1.0;
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#define CONVERT_IN_TO_OUT(in) ((OUTPUT_SAMPLE) ((in) * gInOutScaler))
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#define INPUT_DEVICE (Pa_GetDefaultInputDevice())
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#define OUTPUT_DEVICE (Pa_GetDefaultOutputDevice())
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static PaError TestConfiguration( WireConfig_t *config );
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static int wireCallback( const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData );
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/* This routine will be called by the PortAudio engine when audio is needed.
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** It may be 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 wireCallback( const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData )
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{
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INPUT_SAMPLE *in;
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OUTPUT_SAMPLE *out;
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int inStride;
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int outStride;
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int inDone = 0;
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int outDone = 0;
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WireConfig_t *config = (WireConfig_t *) userData;
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unsigned int i;
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int inChannel, outChannel;
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/* This may get called with NULL inputBuffer during initial setup. */
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if( inputBuffer == NULL) return 0;
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inChannel=0, outChannel=0;
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while( !(inDone && outDone) )
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{
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if( config->isInputInterleaved )
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{
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in = ((INPUT_SAMPLE*)inputBuffer) + inChannel;
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inStride = config->numInputChannels;
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}
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else
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{
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in = ((INPUT_SAMPLE**)inputBuffer)[inChannel];
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inStride = 1;
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}
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if( config->isOutputInterleaved )
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{
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out = ((OUTPUT_SAMPLE*)outputBuffer) + outChannel;
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outStride = config->numOutputChannels;
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}
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else
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{
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out = ((OUTPUT_SAMPLE**)outputBuffer)[outChannel];
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outStride = 1;
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}
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for( i=0; i<framesPerBuffer; i++ )
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{
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*out = CONVERT_IN_TO_OUT( *in );
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out += outStride;
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in += inStride;
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}
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if(inChannel < (config->numInputChannels - 1)) inChannel++;
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else inDone = 1;
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if(outChannel < (config->numOutputChannels - 1)) outChannel++;
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else outDone = 1;
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}
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return 0;
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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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PaError err;
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WireConfig_t CONFIG;
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WireConfig_t *config = &CONFIG;
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int configIndex = 0;;
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err = Pa_Initialize();
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if( err != paNoError ) goto error;
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printf("Please connect audio signal to input and listen for it on output!\n");
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printf("input format = %lu\n", INPUT_FORMAT );
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printf("output format = %lu\n", OUTPUT_FORMAT );
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printf("input device ID = %d\n", INPUT_DEVICE );
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printf("output device ID = %d\n", OUTPUT_DEVICE );
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if( INPUT_FORMAT == OUTPUT_FORMAT )
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{
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gInOutScaler = 1.0;
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}
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else if( (INPUT_FORMAT == paInt16) && (OUTPUT_FORMAT == paFloat32) )
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{
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gInOutScaler = 1.0/32768.0;
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}
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else if( (INPUT_FORMAT == paFloat32) && (OUTPUT_FORMAT == paInt16) )
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{
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gInOutScaler = 32768.0;
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}
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for( config->isInputInterleaved = 0; config->isInputInterleaved < 2; config->isInputInterleaved++ )
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{
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for( config->isOutputInterleaved = 0; config->isOutputInterleaved < 2; config->isOutputInterleaved++ )
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{
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for( config->numInputChannels = 1; config->numInputChannels < 3; config->numInputChannels++ )
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{
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for( config->numOutputChannels = 1; config->numOutputChannels < 3; config->numOutputChannels++ )
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{
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/* If framesPerCallback = 0, assertion fails in file pa_common/pa_process.c, line 1413: EX. */
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for( config->framesPerCallback = 64; config->framesPerCallback < 129; config->framesPerCallback += 64 )
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{
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printf("-----------------------------------------------\n" );
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printf("Configuration #%d\n", configIndex++ );
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err = TestConfiguration( config );
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/* Give user a chance to bail out. */
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if( err == 1 )
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{
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err = paNoError;
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goto done;
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}
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else if( err != paNoError ) goto error;
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}
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}
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}
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}
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}
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done:
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Pa_Terminate();
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printf("Full duplex sound test complete.\n"); fflush(stdout);
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printf("Hit ENTER to quit.\n"); fflush(stdout);
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getchar();
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return 0;
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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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printf("Hit ENTER to quit.\n"); fflush(stdout);
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getchar();
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return -1;
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}
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static PaError TestConfiguration( WireConfig_t *config )
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{
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int c;
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PaError err;
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PaStream *stream;
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PaStreamParameters inputParameters, outputParameters;
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printf("input %sinterleaved!\n", (config->isInputInterleaved ? " " : "NOT ") );
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printf("output %sinterleaved!\n", (config->isOutputInterleaved ? " " : "NOT ") );
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printf("input channels = %d\n", config->numInputChannels );
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printf("output channels = %d\n", config->numOutputChannels );
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printf("framesPerCallback = %d\n", config->framesPerCallback );
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inputParameters.device = INPUT_DEVICE; /* default input device */
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inputParameters.channelCount = config->numInputChannels;
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inputParameters.sampleFormat = INPUT_FORMAT | (config->isInputInterleaved ? 0 : paNonInterleaved);
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inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
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inputParameters.hostApiSpecificStreamInfo = NULL;
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outputParameters.device = OUTPUT_DEVICE; /* default output device */
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outputParameters.channelCount = config->numOutputChannels;
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outputParameters.sampleFormat = OUTPUT_FORMAT | (config->isOutputInterleaved ? 0 : paNonInterleaved);
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outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
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outputParameters.hostApiSpecificStreamInfo = NULL;
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err = Pa_OpenStream(
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&stream,
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&inputParameters,
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&outputParameters,
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SAMPLE_RATE,
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config->framesPerCallback, /* frames per buffer */
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paClipOff, /* we won't output out of range samples so don't bother clipping them */
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wireCallback,
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config );
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if( err != paNoError ) goto error;
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err = Pa_StartStream( stream );
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if( err != paNoError ) goto error;
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printf("Hit ENTER for next configuration, or 'q' to quit.\n"); fflush(stdout);
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c = getchar();
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printf("Closing stream.\n");
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err = Pa_CloseStream( stream );
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if( err != paNoError ) goto error;
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if( c == 'q' ) return 1;
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error:
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return err;
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}
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