add initial structure

1 files changed, 178 insertions, 0 deletions

diff --git a/portaudio/test/patest_two_rates.c b/portaudio/test/patest_two_rates.c
new file mode 100644
index 0000000..2116b1e
--- /dev/null
+++ b/portaudio/test/patest_two_rates.c
@@ -0,0 +1,178 @@
+/** @file patest_two_rates.c
+    @ingroup test_src
+    @brief Play two streams at different rates to make sure they don't interfere.
+    @author Phil Burk <philburk@softsynth.com>
+*/
+/*
+ * $Id$
+ *
+ * Author: Phil Burk  http://www.softsynth.com
+ *
+ * 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 OUTPUT_DEVICE       (Pa_GetDefaultOutputDeviceID())
+#define SAMPLE_RATE_1       (44100)
+#define SAMPLE_RATE_2       (48000)
+#define FRAMES_PER_BUFFER   (256)
+#define FREQ_INCR           (0.1)
+
+#ifndef M_PI
+#define M_PI  (3.14159265)
+#endif
+
+typedef struct
+{
+    double phase;
+    int    numFrames;
+} 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;
+    int frameIndex;
+    (void) timeInfo; /* Prevent unused variable warnings. */
+    (void) inputBuffer;
+
+    for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ )
+    {
+        /* Generate sine wave. */
+        float value = (float) 0.3 * sin(data->phase);
+        /* Stereo - two channels. */
+        *out++ = value;
+        *out++ = value;
+
+        data->phase += FREQ_INCR;
+        if( data->phase >= (2.0 * M_PI) ) data->phase -= (2.0 * M_PI);
+    }
+    data->numFrames += 1;
+    return 0;
+}
+
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+    PaError err;
+    PaStreamParameters outputParameters;
+    PaStream *stream1;
+    PaStream *stream2;
+    paTestData data1 = {0};
+    paTestData data2 = {0};
+    printf("PortAudio Test: two rates.\n" );
+
+    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;
+
+    /* Start first stream. **********************/
+    err = Pa_OpenStream(
+                        &stream1,
+                        NULL, /* no input */
+                        &outputParameters,
+                        SAMPLE_RATE_1,
+                        FRAMES_PER_BUFFER,
+                        paClipOff,      /* we won't output out of range samples so don't bother clipping them */
+                        patestCallback,
+                        &data1 );
+    if( err != paNoError ) goto error;
+
+    err = Pa_StartStream( stream1 );
+    if( err != paNoError ) goto error;
+
+    Pa_Sleep( 3 * 1000 );
+
+    /* Start second stream. **********************/
+    err = Pa_OpenStream(
+                        &stream2,
+                        NULL, /* no input */
+                        &outputParameters,
+                        SAMPLE_RATE_2,
+                        FRAMES_PER_BUFFER,
+                        paClipOff,      /* we won't output out of range samples so don't bother clipping them */
+                        patestCallback,
+                        &data2 );
+    if( err != paNoError ) goto error;
+
+    err = Pa_StartStream( stream2 );
+    if( err != paNoError ) goto error;
+
+    Pa_Sleep( 3 * 1000 );
+
+    err = Pa_StopStream( stream2 );
+    if( err != paNoError ) goto error;
+
+    Pa_Sleep( 3 * 1000 );
+
+    err = Pa_StopStream( stream1 );
+    if( err != paNoError ) goto error;
+
+    Pa_CloseStream( stream2 );
+    Pa_CloseStream( stream1 );
+
+    Pa_Terminate();
+
+    printf("NumFrames = %d on stream1, %d on stream2.\n", data1.numFrames, data2.numFrames );
+    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;
+}