cannam@89: /** @file patest_read_record.c
cannam@89: 	@ingroup test_src
cannam@89: 	@brief Record input into an array; Save array to a file; Playback recorded
cannam@89:     data. Implemented using the blocking API (Pa_ReadStream(), Pa_WriteStream() )
cannam@89: 	@author Phil Burk  http://www.softsynth.com
cannam@89:     @author Ross Bencina rossb@audiomulch.com
cannam@89: */
cannam@89: /*
cannam@89:  * $Id: patest_read_record.c 1368 2008-03-01 00:38:27Z rossb $
cannam@89:  *
cannam@89:  * This program uses the PortAudio Portable Audio Library.
cannam@89:  * For more information see: http://www.portaudio.com
cannam@89:  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
cannam@89:  *
cannam@89:  * Permission is hereby granted, free of charge, to any person obtaining
cannam@89:  * a copy of this software and associated documentation files
cannam@89:  * (the "Software"), to deal in the Software without restriction,
cannam@89:  * including without limitation the rights to use, copy, modify, merge,
cannam@89:  * publish, distribute, sublicense, and/or sell copies of the Software,
cannam@89:  * and to permit persons to whom the Software is furnished to do so,
cannam@89:  * subject to the following conditions:
cannam@89:  *
cannam@89:  * The above copyright notice and this permission notice shall be
cannam@89:  * included in all copies or substantial portions of the Software.
cannam@89:  *
cannam@89:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@89:  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@89:  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
cannam@89:  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
cannam@89:  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@89:  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@89:  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@89:  */
cannam@89: 
cannam@89: /*
cannam@89:  * The text above constitutes the entire PortAudio license; however, 
cannam@89:  * the PortAudio community also makes the following non-binding requests:
cannam@89:  *
cannam@89:  * Any person wishing to distribute modifications to the Software is
cannam@89:  * requested to send the modifications to the original developer so that
cannam@89:  * they can be incorporated into the canonical version. It is also 
cannam@89:  * requested that these non-binding requests be included along with the 
cannam@89:  * license above.
cannam@89:  */
cannam@89: 
cannam@89: #include <stdio.h>
cannam@89: #include <stdlib.h>
cannam@89: #include "portaudio.h"
cannam@89: 
cannam@89: /* #define SAMPLE_RATE  (17932) // Test failure to open with this value. */
cannam@89: #define SAMPLE_RATE  (44100)
cannam@89: #define FRAMES_PER_BUFFER (1024)
cannam@89: #define NUM_SECONDS     (5)
cannam@89: #define NUM_CHANNELS    (2)
cannam@89: /* #define DITHER_FLAG     (paDitherOff)  */
cannam@89: #define DITHER_FLAG     (0) /**/
cannam@89: 
cannam@89: /* Select sample format. */
cannam@89: #if 1
cannam@89: #define PA_SAMPLE_TYPE  paFloat32
cannam@89: typedef float SAMPLE;
cannam@89: #define SAMPLE_SILENCE  (0.0f)
cannam@89: #define PRINTF_S_FORMAT "%.8f"
cannam@89: #elif 1
cannam@89: #define PA_SAMPLE_TYPE  paInt16
cannam@89: typedef short SAMPLE;
cannam@89: #define SAMPLE_SILENCE  (0)
cannam@89: #define PRINTF_S_FORMAT "%d"
cannam@89: #elif 0
cannam@89: #define PA_SAMPLE_TYPE  paInt8
cannam@89: typedef char SAMPLE;
cannam@89: #define SAMPLE_SILENCE  (0)
cannam@89: #define PRINTF_S_FORMAT "%d"
cannam@89: #else
cannam@89: #define PA_SAMPLE_TYPE  paUInt8
cannam@89: typedef unsigned char SAMPLE;
cannam@89: #define SAMPLE_SILENCE  (128)
cannam@89: #define PRINTF_S_FORMAT "%d"
cannam@89: #endif
cannam@89: 
cannam@89: 
cannam@89: /*******************************************************************/
cannam@89: int main(void);
cannam@89: int main(void)
cannam@89: {
cannam@89:     PaStreamParameters inputParameters, outputParameters;
cannam@89:     PaStream *stream;
cannam@89:     PaError err;
cannam@89:     SAMPLE *recordedSamples;
cannam@89:     int i;
cannam@89:     int totalFrames;
cannam@89:     int numSamples;
cannam@89:     int numBytes;
cannam@89:     SAMPLE max, average, val;
cannam@89:     
cannam@89:     
cannam@89:     printf("patest_read_record.c\n"); fflush(stdout);
cannam@89: 
cannam@89:     totalFrames = NUM_SECONDS * SAMPLE_RATE; /* Record for a few seconds. */
cannam@89:     numSamples = totalFrames * NUM_CHANNELS;
cannam@89: 
cannam@89:     numBytes = numSamples * sizeof(SAMPLE);
cannam@89:     recordedSamples = (SAMPLE *) malloc( numBytes );
cannam@89:     if( recordedSamples == NULL )
cannam@89:     {
cannam@89:         printf("Could not allocate record array.\n");
cannam@89:         exit(1);
cannam@89:     }
cannam@89:     for( i=0; i<numSamples; i++ ) recordedSamples[i] = 0;
cannam@89: 
cannam@89:     err = Pa_Initialize();
cannam@89:     if( err != paNoError ) goto error;
cannam@89: 
cannam@89:     inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
cannam@89:     if (inputParameters.device == paNoDevice) {
cannam@89:       fprintf(stderr,"Error: No default input device.\n");
cannam@89:       goto error;
cannam@89:     }
cannam@89:     inputParameters.channelCount = NUM_CHANNELS;
cannam@89:     inputParameters.sampleFormat = PA_SAMPLE_TYPE;
cannam@89:     inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
cannam@89:     inputParameters.hostApiSpecificStreamInfo = NULL;
cannam@89: 
cannam@89:     /* Record some audio. -------------------------------------------- */
cannam@89:     err = Pa_OpenStream(
cannam@89:               &stream,
cannam@89:               &inputParameters,
cannam@89:               NULL,                  /* &outputParameters, */
cannam@89:               SAMPLE_RATE,
cannam@89:               FRAMES_PER_BUFFER,
cannam@89:               paClipOff,      /* we won't output out of range samples so don't bother clipping them */
cannam@89:               NULL, /* no callback, use blocking API */
cannam@89:               NULL ); /* no callback, so no callback userData */
cannam@89:     if( err != paNoError ) goto error;
cannam@89: 
cannam@89:     err = Pa_StartStream( stream );
cannam@89:     if( err != paNoError ) goto error;
cannam@89:     printf("Now recording!!\n"); fflush(stdout);
cannam@89: 
cannam@89:     err = Pa_ReadStream( stream, recordedSamples, totalFrames );
cannam@89:     if( err != paNoError ) goto error;
cannam@89:     
cannam@89:     err = Pa_CloseStream( stream );
cannam@89:     if( err != paNoError ) goto error;
cannam@89: 
cannam@89:     /* Measure maximum peak amplitude. */
cannam@89:     max = 0;
cannam@89:     average = 0;
cannam@89:     for( i=0; i<numSamples; i++ )
cannam@89:     {
cannam@89:         val = recordedSamples[i];
cannam@89:         if( val < 0 ) val = -val; /* ABS */
cannam@89:         if( val > max )
cannam@89:         {
cannam@89:             max = val;
cannam@89:         }
cannam@89:         average += val;
cannam@89:     }
cannam@89: 
cannam@89:     average = average / numSamples;
cannam@89: 
cannam@89:     printf("Sample max amplitude = "PRINTF_S_FORMAT"\n", max );
cannam@89:     printf("Sample average = "PRINTF_S_FORMAT"\n", average );
cannam@89: /*  Was as below. Better choose at compile time because this
cannam@89:     keeps generating compiler-warnings:
cannam@89:     if( PA_SAMPLE_TYPE == paFloat32 )
cannam@89:     {
cannam@89:         printf("sample max amplitude = %f\n", max );
cannam@89:         printf("sample average = %f\n", average );
cannam@89:     }
cannam@89:     else
cannam@89:     {
cannam@89:         printf("sample max amplitude = %d\n", max );
cannam@89:         printf("sample average = %d\n", average );
cannam@89:     }
cannam@89: */
cannam@89:     /* Write recorded data to a file. */
cannam@89: #if 0
cannam@89:     {
cannam@89:         FILE  *fid;
cannam@89:         fid = fopen("recorded.raw", "wb");
cannam@89:         if( fid == NULL )
cannam@89:         {
cannam@89:             printf("Could not open file.");
cannam@89:         }
cannam@89:         else
cannam@89:         {
cannam@89:             fwrite( recordedSamples, NUM_CHANNELS * sizeof(SAMPLE), totalFrames, fid );
cannam@89:             fclose( fid );
cannam@89:             printf("Wrote data to 'recorded.raw'\n");
cannam@89:         }
cannam@89:     }
cannam@89: #endif
cannam@89: 
cannam@89:     /* Playback recorded data.  -------------------------------------------- */
cannam@89:     
cannam@89:     outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
cannam@89:     if (outputParameters.device == paNoDevice) {
cannam@89:       fprintf(stderr,"Error: No default output device.\n");
cannam@89:       goto error;
cannam@89:     }
cannam@89:     outputParameters.channelCount = NUM_CHANNELS;
cannam@89:     outputParameters.sampleFormat =  PA_SAMPLE_TYPE;
cannam@89:     outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
cannam@89:     outputParameters.hostApiSpecificStreamInfo = NULL;
cannam@89: 
cannam@89:     printf("Begin playback.\n"); fflush(stdout);
cannam@89:     err = Pa_OpenStream(
cannam@89:               &stream,
cannam@89:               NULL, /* no input */
cannam@89:               &outputParameters,
cannam@89:               SAMPLE_RATE,
cannam@89:               FRAMES_PER_BUFFER,
cannam@89:               paClipOff,      /* we won't output out of range samples so don't bother clipping them */
cannam@89:               NULL, /* no callback, use blocking API */
cannam@89:               NULL ); /* no callback, so no callback userData */
cannam@89:     if( err != paNoError ) goto error;
cannam@89: 
cannam@89:     if( stream )
cannam@89:     {
cannam@89:         err = Pa_StartStream( stream );
cannam@89:         if( err != paNoError ) goto error;
cannam@89:         printf("Waiting for playback to finish.\n"); fflush(stdout);
cannam@89: 
cannam@89:         err = Pa_WriteStream( stream, recordedSamples, totalFrames );
cannam@89:         if( err != paNoError ) goto error;
cannam@89: 
cannam@89:         err = Pa_CloseStream( stream );
cannam@89:         if( err != paNoError ) goto error;
cannam@89:         printf("Done.\n"); fflush(stdout);
cannam@89:     }
cannam@89:     free( recordedSamples );
cannam@89: 
cannam@89:     Pa_Terminate();
cannam@89:     return 0;
cannam@89: 
cannam@89: error:
cannam@89:     Pa_Terminate();
cannam@89:     fprintf( stderr, "An error occured while using the portaudio stream\n" );
cannam@89:     fprintf( stderr, "Error number: %d\n", err );
cannam@89:     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
cannam@89:     return -1;
cannam@89: }
cannam@89: