add initial structure

1 files changed, 200 insertions, 0 deletions

diff --git a/portaudio/test/patest_toomanysines.c b/portaudio/test/patest_toomanysines.c
new file mode 100644
index 0000000..2d32071
--- /dev/null
+++ b/portaudio/test/patest_toomanysines.c
@@ -0,0 +1,200 @@
+/** @file patest_toomanysines.c
+    @ingroup test_src
+    @brief Play more sine waves than we can handle in real time as a stress test.
+    @todo This may not be needed now that we have "patest_out_overflow.c".
+    @author Ross Bencina <rossb@audiomulch.com>
+    @author Phil Burk <philburk@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 <math.h>
+#include "portaudio.h"
+
+#define MAX_SINES     (1000)
+#define MAX_LOAD      (1.2)
+#define SAMPLE_RATE   (44100)
+#define FRAMES_PER_BUFFER  (512)
+#ifndef M_PI
+#define M_PI  (3.14159265)
+#endif
+#define TWOPI (M_PI * 2.0)
+
+typedef struct paTestData
+{
+    int numSines;
+    double phases[MAX_SINES];
+}
+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 long i;
+    int j;
+    int finished = 0;
+    (void) inputBuffer; /* Prevent unused variable warning. */
+
+    for( i=0; i<framesPerBuffer; i++ )
+    {
+        float output = 0.0;
+        double phaseInc = 0.02;
+        double phase;
+        for( j=0; j<data->numSines; j++ )
+        {
+            /* Advance phase of next oscillator. */
+            phase = data->phases[j];
+            phase += phaseInc;
+            if( phase > TWOPI ) phase -= TWOPI;
+
+            phaseInc *= 1.02;
+            if( phaseInc > 0.5 ) phaseInc *= 0.5;
+
+            /* This is not a very efficient way to calc sines. */
+            output += (float) sin( phase );
+            data->phases[j] = phase;
+        }
+        *out++ = (float) (output / data->numSines);
+    }
+    return finished;
+}
+
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+    PaStreamParameters outputParameters;
+    PaStream *stream;
+    PaError err;
+    int numStress;
+    paTestData data = {0};
+    double load;
+
+    printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d. MAX_LOAD = %f\n",
+        SAMPLE_RATE, FRAMES_PER_BUFFER, MAX_LOAD );
+
+    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 = 1;                      /* mono 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;
+    err = Pa_StartStream( stream );
+    if( err != paNoError ) goto error;
+
+    /* Determine number of sines required to get to 50% */
+    do
+    {        Pa_Sleep( 100 );
+
+        load = Pa_GetStreamCpuLoad( stream );
+        printf("numSines = %d, CPU load = %f\n", data.numSines, load );
+
+        if( load < 0.3 )
+        {
+            data.numSines += 10;
+        }
+        else if( load < 0.4 )
+        {
+            data.numSines += 2;
+        }
+        else
+        {
+            data.numSines += 1;
+        }
+
+    }
+    while( load < 0.5 );
+
+    /* Calculate target stress value then ramp up to that level*/
+    numStress = (int) (2.0 * data.numSines * MAX_LOAD );
+    if( numStress > MAX_SINES )
+        numStress = MAX_SINES;
+    for( ; data.numSines < numStress; data.numSines+=2 )
+    {
+        Pa_Sleep( 200 );
+        load = Pa_GetStreamCpuLoad( stream );
+        printf("STRESSING: numSines = %d, CPU load = %f\n", data.numSines, load );
+    }
+
+    printf("Suffer for 5 seconds.\n");
+    Pa_Sleep( 5000 );
+
+    printf("Stop stream.\n");
+    err = Pa_StopStream( stream );
+    if( err != paNoError ) goto error;
+
+    err = Pa_CloseStream( stream );
+    if( err != paNoError ) goto error;
+
+    Pa_Terminate();
+    printf("Test finished.\n");
+    return err;
+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;
+}