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+/** @file patest_many.c
+ @ingroup test_src
+ @brief Start and stop the PortAudio Driver multiple times.
+ @author Phil Burk http://www.softsynth.com
+*/
+/*
+ * $Id$
+ *
+ * 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.
+ */
+
+/*
+ * The text above constitutes the entire PortAudio license; however,
+ * the PortAudio community also makes the following non-binding requests:
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version. It is also
+ * requested that these non-binding requests be included along with the
+ * license above.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include "portaudio.h"
+#define NUM_SECONDS (1)
+#define SAMPLE_RATE (44100)
+#ifndef M_PI
+#define M_PI (3.14159265)
+#endif
+#define TABLE_SIZE (200)
+typedef struct
+{
+ short sine[TABLE_SIZE];
+ int left_phase;
+ int right_phase;
+ unsigned int sampsToGo;
+}
+paTestData;
+PaError TestOnce( void );
+static int patest1Callback( const void *inputBuffer, void *outputBuffer,
+ unsigned long framesPerBuffer,
+ const PaStreamCallbackTimeInfo* timeInfo,
+ PaStreamCallbackFlags statusFlags,
+ void *userData );
+
+/* This routine will be called by the PortAudio engine when audio is needed.
+** It may 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 patest1Callback( const void *inputBuffer, void *outputBuffer,
+ unsigned long framesPerBuffer,
+ const PaStreamCallbackTimeInfo* timeInfo,
+ PaStreamCallbackFlags statusFlags,
+ void *userData )
+{
+ paTestData *data = (paTestData*)userData;
+ short *out = (short*)outputBuffer;
+ unsigned int i;
+ int finished = 0;
+ (void) inputBuffer; /* Prevent "unused variable" warnings. */
+
+ if( data->sampsToGo < framesPerBuffer )
+ {
+ /* final buffer... */
+
+ for( i=0; i<data->sampsToGo; i++ )
+ {
+ *out++ = data->sine[data->left_phase]; /* left */
+ *out++ = data->sine[data->right_phase]; /* right */
+ data->left_phase += 1;
+ if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
+ data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
+ if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
+ }
+ /* zero remainder of final buffer */
+ for( ; i<framesPerBuffer; i++ )
+ {
+ *out++ = 0; /* left */
+ *out++ = 0; /* right */
+ }
+
+ finished = 1;
+ }
+ else
+ {
+ for( i=0; i<framesPerBuffer; i++ )
+ {
+ *out++ = data->sine[data->left_phase]; /* left */
+ *out++ = data->sine[data->right_phase]; /* right */
+ data->left_phase += 1;
+ if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
+ data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
+ if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
+ }
+ data->sampsToGo -= framesPerBuffer;
+ }
+ return finished;
+}
+/*******************************************************************/
+#ifdef MACINTOSH
+int main(void);
+int main(void)
+{
+ int i;
+ PaError err;
+ int numLoops = 10;
+ printf("Loop %d times.\n", numLoops );
+ for( i=0; i<numLoops; i++ )
+ {
+ printf("Loop %d out of %d.\n", i+1, numLoops );
+ err = TestOnce();
+ if( err < 0 ) return 0;
+ }
+}
+#else
+int main(int argc, char **argv);
+int main(int argc, char **argv)
+{
+ PaError err;
+ int i, numLoops = 10;
+ if( argc > 1 )
+ {
+ numLoops = atoi(argv[1]);
+ }
+ for( i=0; i<numLoops; i++ )
+ {
+ printf("Loop %d out of %d.\n", i+1, numLoops );
+ err = TestOnce();
+ if( err < 0 ) return 1;
+ }
+ printf("Test complete.\n");
+ return 0;
+}
+#endif
+PaError TestOnce( void )
+{
+ PaStreamParameters outputParameters;
+ PaStream *stream;
+ PaError err;
+ paTestData data;
+ int i;
+ int totalSamps;
+ /* initialise sinusoidal wavetable */
+ for( i=0; i<TABLE_SIZE; i++ )
+ {
+ data.sine[i] = (short) (32767.0 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ));
+ }
+ data.left_phase = data.right_phase = 0;
+ data.sampsToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
+ err = Pa_Initialize();
+ if( err != paNoError ) goto error;
+
+ outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
+ if (outputParameters.device == paNoDevice) {
+ fprintf(stderr,"Error: No default output device.\n");
+ goto error;
+ }
+ outputParameters.channelCount = 2; /* stereo output */
+ outputParameters.sampleFormat = paInt16;
+ outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
+ outputParameters.hostApiSpecificStreamInfo = NULL;
+ err = Pa_OpenStream(
+ &stream,
+ NULL, /* no input */
+ &outputParameters,
+ SAMPLE_RATE,
+ 1024, /* frames per buffer */
+ paClipOff, /* we won't output out of range samples so don't bother clipping them */
+ patest1Callback,
+ &data );
+ if( err != paNoError ) goto error;
+
+ err = Pa_StartStream( stream );
+ if( err != paNoError ) goto error;
+ printf("Waiting for sound to finish.\n");
+ Pa_Sleep(1000);
+ err = Pa_CloseStream( stream );
+ if( err != paNoError ) goto error;
+ Pa_Terminate();
+ return paNoError;
+error:
+ Pa_Terminate();
+ fprintf( stderr, "An error occurred while using the portaudio stream\n" );
+ fprintf( stderr, "Error number: %d\n", err );
+ fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
+ return err;
+}
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