Chris@4: /** @file patest_read_record.c
Chris@4: 	@ingroup test_src
Chris@4: 	@brief Record input into an array; Save array to a file; Playback recorded
Chris@4:     data. Implemented using the blocking API (Pa_ReadStream(), Pa_WriteStream() )
Chris@4: 	@author Phil Burk  http://www.softsynth.com
Chris@4:     @author Ross Bencina rossb@audiomulch.com
Chris@4: */
Chris@4: /*
Chris@4:  * $Id: patest_read_record.c 1368 2008-03-01 00:38:27Z rossb $
Chris@4:  *
Chris@4:  * This program uses the PortAudio Portable Audio Library.
Chris@4:  * For more information see: http://www.portaudio.com
Chris@4:  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
Chris@4:  *
Chris@4:  * Permission is hereby granted, free of charge, to any person obtaining
Chris@4:  * a copy of this software and associated documentation files
Chris@4:  * (the "Software"), to deal in the Software without restriction,
Chris@4:  * including without limitation the rights to use, copy, modify, merge,
Chris@4:  * publish, distribute, sublicense, and/or sell copies of the Software,
Chris@4:  * and to permit persons to whom the Software is furnished to do so,
Chris@4:  * subject to the following conditions:
Chris@4:  *
Chris@4:  * The above copyright notice and this permission notice shall be
Chris@4:  * included in all copies or substantial portions of the Software.
Chris@4:  *
Chris@4:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
Chris@4:  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
Chris@4:  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
Chris@4:  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
Chris@4:  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
Chris@4:  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
Chris@4:  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Chris@4:  */
Chris@4: 
Chris@4: /*
Chris@4:  * The text above constitutes the entire PortAudio license; however, 
Chris@4:  * the PortAudio community also makes the following non-binding requests:
Chris@4:  *
Chris@4:  * Any person wishing to distribute modifications to the Software is
Chris@4:  * requested to send the modifications to the original developer so that
Chris@4:  * they can be incorporated into the canonical version. It is also 
Chris@4:  * requested that these non-binding requests be included along with the 
Chris@4:  * license above.
Chris@4:  */
Chris@4: 
Chris@4: #include <stdio.h>
Chris@4: #include <stdlib.h>
Chris@4: #include "portaudio.h"
Chris@4: 
Chris@4: /* #define SAMPLE_RATE  (17932) // Test failure to open with this value. */
Chris@4: #define SAMPLE_RATE  (44100)
Chris@4: #define FRAMES_PER_BUFFER (1024)
Chris@4: #define NUM_SECONDS     (5)
Chris@4: #define NUM_CHANNELS    (2)
Chris@4: /* #define DITHER_FLAG     (paDitherOff)  */
Chris@4: #define DITHER_FLAG     (0) /**/
Chris@4: 
Chris@4: /* Select sample format. */
Chris@4: #if 1
Chris@4: #define PA_SAMPLE_TYPE  paFloat32
Chris@4: typedef float SAMPLE;
Chris@4: #define SAMPLE_SILENCE  (0.0f)
Chris@4: #define PRINTF_S_FORMAT "%.8f"
Chris@4: #elif 1
Chris@4: #define PA_SAMPLE_TYPE  paInt16
Chris@4: typedef short SAMPLE;
Chris@4: #define SAMPLE_SILENCE  (0)
Chris@4: #define PRINTF_S_FORMAT "%d"
Chris@4: #elif 0
Chris@4: #define PA_SAMPLE_TYPE  paInt8
Chris@4: typedef char SAMPLE;
Chris@4: #define SAMPLE_SILENCE  (0)
Chris@4: #define PRINTF_S_FORMAT "%d"
Chris@4: #else
Chris@4: #define PA_SAMPLE_TYPE  paUInt8
Chris@4: typedef unsigned char SAMPLE;
Chris@4: #define SAMPLE_SILENCE  (128)
Chris@4: #define PRINTF_S_FORMAT "%d"
Chris@4: #endif
Chris@4: 
Chris@4: 
Chris@4: /*******************************************************************/
Chris@4: int main(void);
Chris@4: int main(void)
Chris@4: {
Chris@4:     PaStreamParameters inputParameters, outputParameters;
Chris@4:     PaStream *stream;
Chris@4:     PaError err;
Chris@4:     SAMPLE *recordedSamples;
Chris@4:     int i;
Chris@4:     int totalFrames;
Chris@4:     int numSamples;
Chris@4:     int numBytes;
Chris@4:     SAMPLE max, average, val;
Chris@4:     
Chris@4:     
Chris@4:     printf("patest_read_record.c\n"); fflush(stdout);
Chris@4: 
Chris@4:     totalFrames = NUM_SECONDS * SAMPLE_RATE; /* Record for a few seconds. */
Chris@4:     numSamples = totalFrames * NUM_CHANNELS;
Chris@4: 
Chris@4:     numBytes = numSamples * sizeof(SAMPLE);
Chris@4:     recordedSamples = (SAMPLE *) malloc( numBytes );
Chris@4:     if( recordedSamples == NULL )
Chris@4:     {
Chris@4:         printf("Could not allocate record array.\n");
Chris@4:         exit(1);
Chris@4:     }
Chris@4:     for( i=0; i<numSamples; i++ ) recordedSamples[i] = 0;
Chris@4: 
Chris@4:     err = Pa_Initialize();
Chris@4:     if( err != paNoError ) goto error;
Chris@4: 
Chris@4:     inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
Chris@4:     if (inputParameters.device == paNoDevice) {
Chris@4:       fprintf(stderr,"Error: No default input device.\n");
Chris@4:       goto error;
Chris@4:     }
Chris@4:     inputParameters.channelCount = NUM_CHANNELS;
Chris@4:     inputParameters.sampleFormat = PA_SAMPLE_TYPE;
Chris@4:     inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
Chris@4:     inputParameters.hostApiSpecificStreamInfo = NULL;
Chris@4: 
Chris@4:     /* Record some audio. -------------------------------------------- */
Chris@4:     err = Pa_OpenStream(
Chris@4:               &stream,
Chris@4:               &inputParameters,
Chris@4:               NULL,                  /* &outputParameters, */
Chris@4:               SAMPLE_RATE,
Chris@4:               FRAMES_PER_BUFFER,
Chris@4:               paClipOff,      /* we won't output out of range samples so don't bother clipping them */
Chris@4:               NULL, /* no callback, use blocking API */
Chris@4:               NULL ); /* no callback, so no callback userData */
Chris@4:     if( err != paNoError ) goto error;
Chris@4: 
Chris@4:     err = Pa_StartStream( stream );
Chris@4:     if( err != paNoError ) goto error;
Chris@4:     printf("Now recording!!\n"); fflush(stdout);
Chris@4: 
Chris@4:     err = Pa_ReadStream( stream, recordedSamples, totalFrames );
Chris@4:     if( err != paNoError ) goto error;
Chris@4:     
Chris@4:     err = Pa_CloseStream( stream );
Chris@4:     if( err != paNoError ) goto error;
Chris@4: 
Chris@4:     /* Measure maximum peak amplitude. */
Chris@4:     max = 0;
Chris@4:     average = 0;
Chris@4:     for( i=0; i<numSamples; i++ )
Chris@4:     {
Chris@4:         val = recordedSamples[i];
Chris@4:         if( val < 0 ) val = -val; /* ABS */
Chris@4:         if( val > max )
Chris@4:         {
Chris@4:             max = val;
Chris@4:         }
Chris@4:         average += val;
Chris@4:     }
Chris@4: 
Chris@4:     average = average / numSamples;
Chris@4: 
Chris@4:     printf("Sample max amplitude = "PRINTF_S_FORMAT"\n", max );
Chris@4:     printf("Sample average = "PRINTF_S_FORMAT"\n", average );
Chris@4: /*  Was as below. Better choose at compile time because this
Chris@4:     keeps generating compiler-warnings:
Chris@4:     if( PA_SAMPLE_TYPE == paFloat32 )
Chris@4:     {
Chris@4:         printf("sample max amplitude = %f\n", max );
Chris@4:         printf("sample average = %f\n", average );
Chris@4:     }
Chris@4:     else
Chris@4:     {
Chris@4:         printf("sample max amplitude = %d\n", max );
Chris@4:         printf("sample average = %d\n", average );
Chris@4:     }
Chris@4: */
Chris@4:     /* Write recorded data to a file. */
Chris@4: #if 0
Chris@4:     {
Chris@4:         FILE  *fid;
Chris@4:         fid = fopen("recorded.raw", "wb");
Chris@4:         if( fid == NULL )
Chris@4:         {
Chris@4:             printf("Could not open file.");
Chris@4:         }
Chris@4:         else
Chris@4:         {
Chris@4:             fwrite( recordedSamples, NUM_CHANNELS * sizeof(SAMPLE), totalFrames, fid );
Chris@4:             fclose( fid );
Chris@4:             printf("Wrote data to 'recorded.raw'\n");
Chris@4:         }
Chris@4:     }
Chris@4: #endif
Chris@4: 
Chris@4:     /* Playback recorded data.  -------------------------------------------- */
Chris@4:     
Chris@4:     outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
Chris@4:     if (outputParameters.device == paNoDevice) {
Chris@4:       fprintf(stderr,"Error: No default output device.\n");
Chris@4:       goto error;
Chris@4:     }
Chris@4:     outputParameters.channelCount = NUM_CHANNELS;
Chris@4:     outputParameters.sampleFormat =  PA_SAMPLE_TYPE;
Chris@4:     outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
Chris@4:     outputParameters.hostApiSpecificStreamInfo = NULL;
Chris@4: 
Chris@4:     printf("Begin playback.\n"); fflush(stdout);
Chris@4:     err = Pa_OpenStream(
Chris@4:               &stream,
Chris@4:               NULL, /* no input */
Chris@4:               &outputParameters,
Chris@4:               SAMPLE_RATE,
Chris@4:               FRAMES_PER_BUFFER,
Chris@4:               paClipOff,      /* we won't output out of range samples so don't bother clipping them */
Chris@4:               NULL, /* no callback, use blocking API */
Chris@4:               NULL ); /* no callback, so no callback userData */
Chris@4:     if( err != paNoError ) goto error;
Chris@4: 
Chris@4:     if( stream )
Chris@4:     {
Chris@4:         err = Pa_StartStream( stream );
Chris@4:         if( err != paNoError ) goto error;
Chris@4:         printf("Waiting for playback to finish.\n"); fflush(stdout);
Chris@4: 
Chris@4:         err = Pa_WriteStream( stream, recordedSamples, totalFrames );
Chris@4:         if( err != paNoError ) goto error;
Chris@4: 
Chris@4:         err = Pa_CloseStream( stream );
Chris@4:         if( err != paNoError ) goto error;
Chris@4:         printf("Done.\n"); fflush(stdout);
Chris@4:     }
Chris@4:     free( recordedSamples );
Chris@4: 
Chris@4:     Pa_Terminate();
Chris@4:     return 0;
Chris@4: 
Chris@4: error:
Chris@4:     Pa_Terminate();
Chris@4:     fprintf( stderr, "An error occured while using the portaudio stream\n" );
Chris@4:     fprintf( stderr, "Error number: %d\n", err );
Chris@4:     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
Chris@4:     return -1;
Chris@4: }
Chris@4: