comparison src/portaudio/test/patest1.c @ 89:8a15ff55d9af

Add bzip2, zlib, liblo, portaudio sources

+/** @file patest1.c
+	@ingroup test_src
+	@brief Ring modulate the audio input with a sine wave for 20 seconds.
+	@author Ross Bencina <[e-mail]>
+*/
+/*
+ * $Id: patest1.c 1368 2008-03-01 00:38:27Z rossb $
+ *
+ * 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 <math.h>
+#include "portaudio.h"
+
+#ifndef M_PI
+#define M_PI (3.14159265)
+#endif
+
+#define SAMPLE_RATE (44100)
+
+typedef struct
+{
+    float sine[100];
+    int phase;
+    int sampsToGo;
+}
+patest1data;
+
+static int patest1Callback( const void *inputBuffer, void *outputBuffer,
+                            unsigned long framesPerBuffer,
+                            const PaStreamCallbackTimeInfo* timeInfo,
+                            PaStreamCallbackFlags statusFlags,
+                            void *userData )
+{
+    patest1data *data = (patest1data*)userData;
+    float *in = (float*)inputBuffer;
+    float *out = (float*)outputBuffer;
+    int framesToCalc = framesPerBuffer;
+    unsigned long i = 0;
+    int finished;
+
+    if( data->sampsToGo < framesPerBuffer )
+    {
+        framesToCalc = data->sampsToGo;
+        finished = paComplete;
+    }
+    else
+    {
+        finished = paContinue;
+    }
+
+    for( ; i<framesToCalc; i++ )
+    {
+        *out++ = *in++ * data->sine[data->phase];  /* left */
+        *out++ = *in++ * data->sine[data->phase++];  /* right */
+        if( data->phase >= 100 )
+            data->phase = 0;
+    }
+
+    data->sampsToGo -= framesToCalc;
+
+    /* zero remainder of final buffer if not already done */
+    for( ; i<framesPerBuffer; i++ )
+    {
+        *out++ = 0; /* left */
+        *out++ = 0; /* right */
+    }
+    
+    return finished;
+}
+
+int main(int argc, char* argv[]);
+int main(int argc, char* argv[])
+{
+    PaStream                *stream;
+    PaError                 err;
+    patest1data             data;
+    int                     i;
+    PaStreamParameters      inputParameters, outputParameters;
+    const PaHostErrorInfo*  herr;
+
+    printf("patest1.c\n"); fflush(stdout);
+    printf("Ring modulate input for 20 seconds.\n"); fflush(stdout);
+    
+    /* initialise sinusoidal wavetable */
+    for( i=0; i<100; i++ )
+        data.sine[i] = sin( ((double)i/100.) * M_PI * 2. );
+    data.phase = 0;
+    data.sampsToGo = SAMPLE_RATE * 20;        /* 20 seconds. */
+
+    /* initialise portaudio subsytem */
+    err = Pa_Initialize();
+
+    inputParameters.device = Pa_GetDefaultInputDevice();    /* default input device */
+    if (inputParameters.device == paNoDevice) {
+      fprintf(stderr,"Error: No input default device.\n");
+      goto done;
+    }
+    inputParameters.channelCount = 2;                       /* stereo input */
+    inputParameters.sampleFormat = paFloat32;               /* 32 bit floating point input */
+    inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
+    inputParameters.hostApiSpecificStreamInfo = NULL;
+
+    outputParameters.device = Pa_GetDefaultOutputDevice();  /* default output device */
+    if (outputParameters.device == paNoDevice) {
+      fprintf(stderr,"Error: No default output device.\n");
+      goto done;
+    }
+    outputParameters.channelCount = 2;                      /* stereo output */
+    outputParameters.sampleFormat = paFloat32;              /* 32 bit floating point output */
+    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
+    outputParameters.hostApiSpecificStreamInfo = NULL;
+
+    err = Pa_OpenStream(
+                        &stream,
+                        &inputParameters,
+                        &outputParameters,
+                        (double)SAMPLE_RATE, /* Samplerate in Hertz. */
+                        512,                 /* Small buffers */
+                        paClipOff,           /* We won't output out of range samples so don't bother clipping them. */
+                        patest1Callback,
+                        &data );
+    if( err != paNoError ) goto done;
+
+    err = Pa_StartStream( stream );
+    if( err != paNoError ) goto done;
+    
+    printf( "Press any key to end.\n" ); fflush(stdout);
+         
+    getc( stdin ); /* wait for input before exiting */
+
+    err = Pa_AbortStream( stream );
+    if( err != paNoError ) goto done;
+    
+    printf( "Waiting for stream to complete...\n" );
+
+    /* sleep until playback has finished */
+    while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(1000);
+    if( err < 0 ) goto done;
+
+    err = Pa_CloseStream( stream );
+    if( err != paNoError ) goto done;
+
+done:
+    Pa_Terminate();
+
+    if( err != paNoError )
+    {
+        fprintf( stderr, "An error occured while using portaudio\n" );
+        if( err == paUnanticipatedHostError )
+        {
+            fprintf( stderr, " unanticipated host error.\n");
+            herr = Pa_GetLastHostErrorInfo();
+            if (herr)
+            {
+                fprintf( stderr, " Error number: %ld\n", herr->errorCode );
+                if (herr->errorText)
+                    fprintf( stderr, " Error text: %s\n", herr->errorText );
+            }
+            else
+                fprintf( stderr, " Pa_GetLastHostErrorInfo() failed!\n" );
+        }
+        else
+        {
+            fprintf( stderr, " Error number: %d\n", err );
+            fprintf( stderr, " Error text: %s\n", Pa_GetErrorText( err ) );
+        }
+
+        err = 1;          /* Always return 0 or 1, but no other return codes. */
+    }
+
+    printf( "bye\n" );
+
+    return err;
+}