--- /dev/null
+/*
+ pa_rec.c
+ David Rowe
+ July 6 2012
+
+ Modified from paex_record.c Portaudio example
+
+ Original author author Phil Burk http://www.softsynth.com
+
+ To Build:
+
+ gcc paex_rec.c -o paex_rec -lm -lrt -lportaudio -pthread
+*/
+
+/*
+ * $Id: paex_record.c 1752 2011-09-08 03:21:55Z philburk $
+ *
+ * This program uses the PortAudio Portable Audio Library.
+ * For more information see: http://www.portaudio.com
+ * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "portaudio.h"
+
+#define SAMPLE_RATE 48000
+#define FRAMES_PER_BUFFER 512
+#define NUM_CHANNELS 2 /* I think most sound cards like stereo, we will
+ convert to mono as we sample */
+#define SAMPLE_SILENCE 0
+
+typedef short SAMPLE;
+
+typedef struct
+{
+ int frameIndex; /* Index into sample array. */
+ int maxFrameIndex;
+ SAMPLE *recordedSamples;
+}
+paTestData;
+
+/* This routine will be called by the PortAudio engine when audio is available.
+** It may be called at interrupt level on some machines so don't do anything
+** that could mess up the system like calling malloc() or free().
+*/
+static int recordCallback( const void *inputBuffer, void *outputBuffer,
+ unsigned long framesPerBuffer,
+ const PaStreamCallbackTimeInfo* timeInfo,
+ PaStreamCallbackFlags statusFlags,
+ void *userData )
+{
+ paTestData *data = (paTestData*)userData;
+ const SAMPLE *rptr = (const SAMPLE*)inputBuffer;
+ SAMPLE *wptr = &data->recordedSamples[data->frameIndex /** NUM_CHANNELS*/];
+ long framesToCalc;
+ long i;
+ int finished;
+ unsigned long framesLeft = data->maxFrameIndex - data->frameIndex;
+
+ (void) outputBuffer; /* Prevent unused variable warnings. */
+ (void) timeInfo;
+ (void) statusFlags;
+ (void) userData;
+
+ if( framesLeft < framesPerBuffer )
+ {
+ framesToCalc = framesLeft;
+ finished = paComplete;
+ }
+ else
+ {
+ framesToCalc = framesPerBuffer;
+ finished = paContinue;
+ }
+
+ if( inputBuffer == NULL )
+ {
+ for( i=0; i<framesToCalc; i++ )
+ {
+ *wptr++ = SAMPLE_SILENCE; /* left */
+ //if( NUM_CHANNELS == 2 ) *wptr++ = SAMPLE_SILENCE; /* right */
+ }
+ }
+ else
+ {
+ for( i=0; i<framesToCalc; i++ )
+ {
+ *wptr++ = *rptr; /* left */
+ rptr += 2;
+ //if( NUM_CHANNELS == 2 ) *wptr++ = *rptr++; /* right */
+ }
+ }
+ data->frameIndex += framesToCalc;
+ return finished;
+}
+
+int main(int argc, char *argv[])
+{
+ PaStreamParameters inputParameters,
+ outputParameters;
+ PaStream* stream;
+ PaError err = paNoError;
+ paTestData data;
+ int i;
+ int totalFrames;
+ int numSamples;
+ int numBytes;
+ SAMPLE max, val;
+ double average;
+ int numSecs;
+ FILE *fout;
+
+ if (argc != 3) {
+ printf("usage: %s rawFile time(s)\n", argv[0]);
+ exit(0);
+ }
+
+ fout = fopen(argv[1], "wt");
+ if (fout == NULL) {
+ printf("Error opening output raw file %s\n", argv[1]);
+ exit(1);
+ }
+
+ numSecs = atoi(argv[2]);
+ printf("patest_record.c\n"); fflush(stdout);
+
+ data.maxFrameIndex = totalFrames = numSecs * SAMPLE_RATE; /* Record for a few seconds. */
+ data.frameIndex = 0;
+ numSamples = totalFrames/* * NUM_CHANNELS*/;
+ numBytes = numSamples * sizeof(SAMPLE);
+ data.recordedSamples = (SAMPLE *) malloc( numBytes ); /* From now on, recordedSamples is initialised. */
+ if( data.recordedSamples == NULL )
+ {
+ printf("Could not allocate record array.\n");
+ goto done;
+ }
+ for( i=0; i<numSamples; i++ ) data.recordedSamples[i] = 0;
+
+ err = Pa_Initialize();
+ if( err != paNoError ) goto done;
+
+ inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
+ if (inputParameters.device == paNoDevice) {
+ fprintf(stderr,"Error: No default input device.\n");
+ goto done;
+ }
+ inputParameters.channelCount = 2; /* stereo input */
+ inputParameters.sampleFormat = paInt16;
+ inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
+ inputParameters.hostApiSpecificStreamInfo = NULL;
+
+ /* Record some audio. -------------------------------------------- */
+
+ err = Pa_OpenStream(
+ &stream,
+ &inputParameters,
+ NULL, /* &outputParameters, */
+ SAMPLE_RATE,
+ FRAMES_PER_BUFFER,
+ paClipOff, /* we won't output out of range samples so don't bother clipping them */
+ recordCallback,
+ &data );
+ if( err != paNoError ) goto done;
+
+ err = Pa_StartStream( stream );
+ if( err != paNoError ) goto done;
+ printf("\n=== Now recording!! Please speak into the microphone. ===\n"); fflush(stdout);
+
+ while( ( err = Pa_IsStreamActive( stream ) ) == 1 )
+ {
+ Pa_Sleep(1000);
+ printf("index = %d\n", data.frameIndex ); fflush(stdout);
+ }
+ if( err < 0 ) goto done;
+
+ err = Pa_CloseStream( stream );
+ if( err != paNoError ) goto done;
+
+ /* Write recorded data to a file. */
+
+ fwrite( data.recordedSamples, /*NUM_CHANNELS * */sizeof(SAMPLE), totalFrames, fout );
+ fclose( fout );
+
+
+done:
+ Pa_Terminate();
+ if( data.recordedSamples ) /* Sure it is NULL or valid. */
+ free( data.recordedSamples );
+ if( err != paNoError )
+ {
+ fprintf( stderr, "An error occured while using the portaudio stream\n" );
+ fprintf( stderr, "Error number: %d\n", err );
+ fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
+ err = 1; /* Always return 0 or 1, but no other return codes. */
+ }
+ return err;
+}
+
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