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authorsanine <sanine.not@pm.me>2022-08-25 14:54:53 -0500
committersanine <sanine.not@pm.me>2022-08-25 14:54:53 -0500
commit37c97e345d12f95dde44e1d1a4c2f2aadd4615bc (patch)
treee1bb25bc855883062bdd7847ff2c04290f71c840 /portaudio/test/patest1.c
parent5634c7b04da619669f2f29f6798c03982be05180 (diff)
add initial structure
Diffstat (limited to 'portaudio/test/patest1.c')
-rw-r--r--portaudio/test/patest1.c208
1 files changed, 208 insertions, 0 deletions
diff --git a/portaudio/test/patest1.c b/portaudio/test/patest1.c
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+/** @file patest1.c
+ @ingroup test_src
+ @brief Ring modulate the audio input with a sine wave for 20 seconds.
+ @author Ross Bencina <rossb@audiomulch.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 <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 subsystem */
+ 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 occurred 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;
+}