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https://github.com/saitohirga/WSJT-X.git
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e8dbf4c446
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@249 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
230 lines
7.4 KiB
C
230 lines
7.4 KiB
C
/** @file patest_read_record.c
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@brief Record input into an array; Save array to a file; Playback recorded
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data. Implemented using the blocking API (Pa_ReadStream(), Pa_WriteStream() )
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@author Phil Burk http://www.softsynth.com
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@author Ross Bencina rossb@audiomulch.com
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*/
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/*
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* $Id$
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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 <stdlib.h>
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#include "portaudio.h"
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/* #define SAMPLE_RATE (17932) // Test failure to open with this value. */
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#define SAMPLE_RATE (44100)
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#define FRAMES_PER_BUFFER (1024)
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#define NUM_SECONDS (5)
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#define NUM_CHANNELS (2)
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/* #define DITHER_FLAG (paDitherOff) */
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#define DITHER_FLAG (0) /**/
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/* Select sample format. */
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#if 1
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#define PA_SAMPLE_TYPE paFloat32
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typedef float SAMPLE;
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#define SAMPLE_SILENCE (0.0f)
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#define PRINTF_S_FORMAT "%.8f"
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#elif 1
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#define PA_SAMPLE_TYPE paInt16
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typedef short SAMPLE;
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#define SAMPLE_SILENCE (0)
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#define PRINTF_S_FORMAT "%d"
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#elif 0
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#define PA_SAMPLE_TYPE paInt8
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typedef char SAMPLE;
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#define SAMPLE_SILENCE (0)
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#define PRINTF_S_FORMAT "%d"
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#else
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#define PA_SAMPLE_TYPE paUInt8
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typedef unsigned char SAMPLE;
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#define SAMPLE_SILENCE (128)
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#define PRINTF_S_FORMAT "%d"
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#endif
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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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PaStreamParameters inputParameters, outputParameters;
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PaStream *stream;
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PaError err;
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SAMPLE *recordedSamples;
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int i;
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int totalFrames;
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int numSamples;
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int numBytes;
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SAMPLE max, average, val;
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printf("patest_read_record.c\n"); fflush(stdout);
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totalFrames = NUM_SECONDS * SAMPLE_RATE; /* Record for a few seconds. */
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numSamples = totalFrames * NUM_CHANNELS;
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numBytes = numSamples * sizeof(SAMPLE);
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recordedSamples = (SAMPLE *) malloc( numBytes );
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if( recordedSamples == NULL )
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{
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printf("Could not allocate record array.\n");
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exit(1);
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}
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for( i=0; i<numSamples; i++ ) recordedSamples[i] = 0;
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err = Pa_Initialize();
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if( err != paNoError ) goto error;
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inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
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inputParameters.channelCount = NUM_CHANNELS;
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inputParameters.sampleFormat = PA_SAMPLE_TYPE;
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inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
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inputParameters.hostApiSpecificStreamInfo = NULL;
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/* Record some audio. -------------------------------------------- */
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err = Pa_OpenStream(
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&stream,
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&inputParameters,
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NULL, /* &outputParameters, */
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SAMPLE_RATE,
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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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NULL, /* no callback, use blocking API */
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NULL ); /* no callback, so no callback userData */
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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("Now recording!!\n"); fflush(stdout);
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err = Pa_ReadStream( stream, recordedSamples, totalFrames );
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if( err != paNoError ) goto error;
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err = Pa_CloseStream( stream );
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if( err != paNoError ) goto error;
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/* Measure maximum peak amplitude. */
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max = 0;
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average = 0;
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for( i=0; i<numSamples; i++ )
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{
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val = recordedSamples[i];
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if( val < 0 ) val = -val; /* ABS */
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if( val > max )
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{
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max = val;
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}
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average += val;
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}
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average = average / numSamples;
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printf("Sample max amplitude = "PRINTF_S_FORMAT"\n", max );
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printf("Sample average = "PRINTF_S_FORMAT"\n", average );
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/* Was as below. Better choose at compile time because this
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keeps generating compiler-warnings:
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if( PA_SAMPLE_TYPE == paFloat32 )
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{
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printf("sample max amplitude = %f\n", max );
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printf("sample average = %f\n", average );
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}
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else
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{
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printf("sample max amplitude = %d\n", max );
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printf("sample average = %d\n", average );
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}
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*/
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/* Write recorded data to a file. */
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#if 0
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{
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FILE *fid;
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fid = fopen("recorded.raw", "wb");
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if( fid == NULL )
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{
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printf("Could not open file.");
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}
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else
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{
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fwrite( recordedSamples, NUM_CHANNELS * sizeof(SAMPLE), totalFrames, fid );
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fclose( fid );
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printf("Wrote data to 'recorded.raw'\n");
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}
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}
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#endif
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/* Playback recorded data. -------------------------------------------- */
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outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
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outputParameters.channelCount = NUM_CHANNELS;
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outputParameters.sampleFormat = PA_SAMPLE_TYPE;
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outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
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outputParameters.hostApiSpecificStreamInfo = NULL;
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printf("Begin playback.\n"); fflush(stdout);
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err = Pa_OpenStream(
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&stream,
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NULL, /* no input */
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&outputParameters,
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SAMPLE_RATE,
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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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NULL, /* no callback, use blocking API */
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NULL ); /* no callback, so no callback userData */
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if( err != paNoError ) goto error;
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if( stream )
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{
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err = Pa_StartStream( stream );
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if( err != paNoError ) goto error;
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printf("Waiting for playback to finish.\n"); fflush(stdout);
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err = Pa_WriteStream( stream, recordedSamples, totalFrames );
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if( err != paNoError ) goto error;
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err = Pa_CloseStream( stream );
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if( err != paNoError ) goto error;
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printf("Done.\n"); fflush(stdout);
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}
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free( recordedSamples );
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Pa_Terminate();
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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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return -1;
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}
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