diff src/portaudio/test/patest_sine_time.c @ 4:e13257ea84a4

Add bzip2, zlib, liblo, portaudio sources

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/portaudio/test/patest_sine_time.c	Wed Mar 20 13:59:52 2013 +0000
@@ -0,0 +1,219 @@
+/** @file patest_sine_time.c
+	@ingroup test_src
+	@brief Play a sine wave for several seconds, pausing in the middle.
+	Uses the Pa_GetStreamTime() call.
+	@author Ross Bencina <[e-mail]>
+	@author Phil Burk <[e-mail]>
+*/
+/*
+ * $Id: patest_sine_time.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"
+#include "pa_util.h"
+
+#define NUM_SECONDS   (8)
+#define SAMPLE_RATE   (44100)
+#define FRAMES_PER_BUFFER  (64)
+
+#ifndef M_PI
+#define M_PI  (3.14159265)
+#endif
+#define TWOPI (M_PI * 2.0)
+
+#define TABLE_SIZE   (200)
+
+typedef struct
+{
+    double           left_phase;
+    double           right_phase;
+    volatile PaTime  outTime;
+}
+paTestData;
+
+/* 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 patestCallback( const void *inputBuffer, void *outputBuffer,
+                            unsigned long framesPerBuffer,
+                            const PaStreamCallbackTimeInfo* timeInfo,
+                            PaStreamCallbackFlags statusFlags,
+                            void *userData )
+{
+    paTestData *data = (paTestData*)userData;
+    float *out = (float*)outputBuffer;
+    unsigned int i;
+
+    double left_phaseInc = 0.02;
+    double right_phaseInc = 0.06;
+
+    double left_phase = data->left_phase;
+    double right_phase = data->right_phase;
+
+    (void) statusFlags; /* Prevent unused variable warnings. */
+    (void) inputBuffer;
+
+    data->outTime = timeInfo->outputBufferDacTime;
+
+    for( i=0; i<framesPerBuffer; i++ )
+    {
+        left_phase += left_phaseInc;
+        if( left_phase > TWOPI ) left_phase -= TWOPI;
+        *out++ = (float) sin( left_phase );
+
+        right_phase += right_phaseInc;
+        if( right_phase > TWOPI ) right_phase -= TWOPI;
+        *out++ = (float) sin( right_phase );
+    }
+
+    data->left_phase = left_phase;
+    data->right_phase = right_phase;
+
+    return paContinue;
+}
+
+/*******************************************************************/
+static void ReportStreamTime( PaStream *stream, paTestData *data );
+static void ReportStreamTime( PaStream *stream, paTestData *data )
+{
+    PaTime  streamTime, latency, outTime;
+    
+    streamTime = Pa_GetStreamTime( stream );
+    outTime = data->outTime;
+    if( outTime < 0.0 )
+    {
+        printf("Stream time = %8.1f\n", streamTime );
+    }
+    else
+    {
+        latency = outTime - streamTime;
+        printf("Stream time = %8.4f, outTime = %8.4f, latency = %8.4f\n",
+            streamTime, outTime, latency );
+    }
+    fflush(stdout);
+}
+
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+    PaStreamParameters outputParameters;
+    PaStream *stream;
+    PaError err;
+    paTestData data;
+    PaTime startTime;
+
+    printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER);
+
+    data.left_phase = data.right_phase = 0;
+
+    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 = paFloat32; /* 32 bit floating point output */
+    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
+    outputParameters.hostApiSpecificStreamInfo = NULL;
+
+    err = Pa_OpenStream(
+              &stream,
+              NULL, /* no input */
+              &outputParameters,
+              SAMPLE_RATE,
+              FRAMES_PER_BUFFER,
+              paClipOff,      /* we won't output out of range samples so don't bother clipping them */
+              patestCallback,
+              &data );
+    if( err != paNoError ) goto error;
+          
+    /* Watch until sound is halfway finished. */
+    printf("Play for %d seconds.\n", NUM_SECONDS/2 ); fflush(stdout);
+
+    data.outTime = -1.0; /* mark time for callback as undefined */
+    err = Pa_StartStream( stream );
+    if( err != paNoError ) goto error;
+
+    startTime = Pa_GetStreamTime( stream );
+
+    do
+    {
+        ReportStreamTime( stream, &data );
+        Pa_Sleep(100);
+    } while( (Pa_GetStreamTime( stream ) - startTime) < (NUM_SECONDS/2) );
+    
+    /* Stop sound for 2 seconds. */
+    err = Pa_StopStream( stream );
+    if( err != paNoError ) goto error;
+    
+    printf("Pause for 2 seconds.\n"); fflush(stdout);
+    Pa_Sleep( 2000 );
+
+    data.outTime = -1.0; /* mark time for callback as undefined */
+    err = Pa_StartStream( stream );
+    if( err != paNoError ) goto error;
+
+    startTime = Pa_GetStreamTime( stream );
+    
+    printf("Play until sound is finished.\n"); fflush(stdout);
+    do
+    {
+        ReportStreamTime( stream, &data );
+        Pa_Sleep(100);
+    } while( (Pa_GetStreamTime( stream ) - startTime) < (NUM_SECONDS/2) );
+    
+    err = Pa_CloseStream( stream );
+    if( err != paNoError ) goto error;
+
+    Pa_Terminate();
+    printf("Test finished.\n");
+    return err;
+    
+error:
+    Pa_Terminate();
+    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 ) );
+    return err;
+}