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Diffstat (limited to '3rdparty/portaudio/test/patest1.c')
-rw-r--r--3rdparty/portaudio/test/patest1.c88
1 files changed, 35 insertions, 53 deletions
diff --git a/3rdparty/portaudio/test/patest1.c b/3rdparty/portaudio/test/patest1.c
index a0fae47394e..20eb00dea45 100644
--- a/3rdparty/portaudio/test/patest1.c
+++ b/3rdparty/portaudio/test/patest1.c
@@ -1,7 +1,7 @@
/** @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>
+ @ingroup test_src
+ @brief Ring modulate the audio input with a sine wave for 20 seconds.
+ @author Ross Bencina <rossb@audiomulch.com>
*/
/*
* $Id$
@@ -31,13 +31,13 @@
*/
/*
- * The text above constitutes the entire PortAudio license; however,
+ * 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
+ * they can be incorporated into the canonical version. It is also
+ * requested that these non-binding requests be included along with the
* license above.
*/
@@ -49,13 +49,15 @@
#define M_PI (3.14159265)
#endif
-#define SAMPLE_RATE (44100)
+#define SAMPLE_RATE (44100)
+#define NUM_INPUT_CHANNELS (1)
+#define NUM_OUTPUT_CHANNELS (2)
+#define SINE_TABLE_SIZE (100)
typedef struct
{
- float sine[100];
+ float sine[SINE_TABLE_SIZE];
int phase;
- int sampsToGo;
}
patest1data;
@@ -68,38 +70,19 @@ static int patest1Callback( const void *inputBuffer, void *outputBuffer,
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++ )
+ for( ; i<framesPerBuffer; i++ )
{
- *out++ = *in++ * data->sine[data->phase]; /* left */
- *out++ = *in++ * data->sine[data->phase++]; /* right */
- if( data->phase >= 100 )
+ /* Mono input, stereo output. */
+ float output = *in++ * data->sine[data->phase++];
+ if( data->phase >= SINE_TABLE_SIZE )
data->phase = 0;
+ *out++ = output; /* left */
+ *out++ = output; /* right */
}
- data->sampsToGo -= framesToCalc;
-
- /* zero remainder of final buffer if not already done */
- for( ; i<framesPerBuffer; i++ )
- {
- *out++ = 0; /* left */
- *out++ = 0; /* right */
- }
-
- return finished;
+ return paContinue;
}
int main(int argc, char* argv[]);
@@ -113,33 +96,32 @@ int main(int argc, char* argv[])
const PaHostErrorInfo* herr;
printf("patest1.c\n"); fflush(stdout);
- printf("Ring modulate input for 20 seconds.\n"); fflush(stdout);
-
+ printf("Ring modulate input until ENTER key pressed.\n"); fflush(stdout);
+
/* initialise sinusoidal wavetable */
- for( i=0; i<100; i++ )
- data.sine[i] = sin( ((double)i/100.) * M_PI * 2. );
+ for( i=0; i<SINE_TABLE_SIZE; i++ )
+ data.sine[i] = sin( ((double)i/SINE_TABLE_SIZE) * M_PI * 2. );
data.phase = 0;
- data.sampsToGo = SAMPLE_RATE * 20; /* 20 seconds. */
- /* initialise portaudio subsytem */
+ /* 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;
+ fprintf(stderr, "Error: No input default device.\n");
+ goto done;
}
- inputParameters.channelCount = 2; /* stereo input */
+ inputParameters.channelCount = NUM_INPUT_CHANNELS; /* mono 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;
+ fprintf(stderr,"Error: No default output device.\n");
+ goto done;
}
- outputParameters.channelCount = 2; /* stereo output */
+ outputParameters.channelCount = NUM_OUTPUT_CHANNELS; /* stereo output */
outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
@@ -149,7 +131,7 @@ int main(int argc, char* argv[])
&inputParameters,
&outputParameters,
(double)SAMPLE_RATE, /* Samplerate in Hertz. */
- 512, /* Small buffers */
+ 256, /* Small buffers */
paClipOff, /* We won't output out of range samples so don't bother clipping them. */
patest1Callback,
&data );
@@ -157,18 +139,18 @@ int main(int argc, char* argv[])
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);
+ while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(100);
if( err < 0 ) goto done;
err = Pa_CloseStream( stream );
@@ -179,7 +161,7 @@ done:
if( err != paNoError )
{
- fprintf( stderr, "An error occured while using portaudio\n" );
+ fprintf( stderr, "An error occurred while using portaudio\n" );
if( err == paUnanticipatedHostError )
{
fprintf( stderr, " unanticipated host error.\n");