comparison src/portaudio/test/patest_multi_sine.c @ 89:8a15ff55d9af

Add bzip2, zlib, liblo, portaudio sources

+/** @file patest_multi_sine.c
+	@ingroup test_src
+	@brief Play a different sine wave on each channel.
+	@author Phil Burk  http://www.softsynth.com
+*/
+/*
+ * $Id: patest_multi_sine.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"
+
+#define SAMPLE_RATE       (44100)
+#define FRAMES_PER_BUFFER (256)
+#define FREQ_INCR         (300.0 / SAMPLE_RATE)
+#define MAX_CHANNELS      (64)
+
+#ifndef M_PI
+#define M_PI  (3.14159265)
+#endif
+
+typedef struct
+{
+    short   interleaved;          /* Nonzero for interleaved / zero for non-interleaved. */
+    int     numChannels;          /* Actually used. */
+    double  phases[MAX_CHANNELS]; /* Each channel gets its' own frequency. */
+}
+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)
+{
+    int         frameIndex, channelIndex;
+    float**     outputs = (float**)outputBuffer;
+    paTestData* data    = (paTestData*)userData;
+
+    (void) inputBuffer;     /* Prevent unused arg warning. */
+    if (data->interleaved)
+        {
+        float *out = (float*)outputBuffer;      /* interleaved version */
+        for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ )
+            {
+            for( channelIndex=0; channelIndex<data->numChannels; channelIndex++ )
+                {
+                /* Output sine wave on every channel. */
+                *out++ = (float) sin(data->phases[channelIndex]);
+
+                /* Play each channel at a higher frequency. */
+                data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex);
+                if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI);
+                }
+            }
+        }
+    else
+        {
+        for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ )
+            {
+            for( channelIndex=0; channelIndex<data->numChannels; channelIndex++ )
+                {
+                /* Output sine wave on every channel. */
+                outputs[channelIndex][frameIndex] = (float) sin(data->phases[channelIndex]);
+
+                /* Play each channel at a higher frequency. */
+                data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex);
+                if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI);
+                }
+            }
+        }
+    return 0;
+}
+
+/*******************************************************************/
+int test(short interleaved)
+{
+    PaStream*           stream;
+    PaStreamParameters  outputParameters;
+    PaError             err;
+    const PaDeviceInfo* pdi;
+    paTestData          data;
+    short               n;
+
+    outputParameters.device = Pa_GetDefaultOutputDevice();  /* Default output device, max channels. */
+    if (outputParameters.device == paNoDevice) {
+      fprintf(stderr,"Error: No default output device.\n");
+      return paInvalidDevice;
+    }
+    pdi = Pa_GetDeviceInfo(outputParameters.device);
+    outputParameters.channelCount = pdi->maxOutputChannels;
+    if (outputParameters.channelCount > MAX_CHANNELS)
+        outputParameters.channelCount = MAX_CHANNELS;
+    outputParameters.sampleFormat = paFloat32;              /* 32 bit floating point output */
+    outputParameters.suggestedLatency = pdi->defaultLowOutputLatency;
+    outputParameters.hostApiSpecificStreamInfo = NULL;
+    
+    data.interleaved = interleaved;
+    data.numChannels = outputParameters.channelCount;
+    for (n = 0; n < data.numChannels; n++)
+        data.phases[n] = 0.0; /* Phases wrap and maybe don't need initialisation. */
+    printf("%d ", data.numChannels);
+    if (interleaved)
+        printf("interleaved ");
+    else
+        {
+        printf(" non-interleaved ");
+        outputParameters.sampleFormat |= paNonInterleaved;
+        }
+    printf("channels.\n");
+
+    err = Pa_OpenStream(&stream,
+                        NULL,               /* No input. */
+                        &outputParameters,
+                        SAMPLE_RATE,        /* Sample rate. */
+                        FRAMES_PER_BUFFER,  /* Frames per buffer. */
+                        paClipOff,          /* Samples never out of range, no clipping. */
+                        patestCallback,
+                        &data);
+    if (err == paNoError)
+        {
+        err = Pa_StartStream(stream);
+        if (err == paNoError)
+            {
+            printf("Hit ENTER to stop this test.\n");
+            getchar();
+            err = Pa_StopStream(stream);
+            }
+        Pa_CloseStream( stream );
+        }
+    return err;    
+}
+
+
+/*******************************************************************/
+int main(void)
+{
+    PaError err;
+
+    printf("PortAudio Test: output sine wave on each channel.\n" );
+
+    err = Pa_Initialize();
+    if (err != paNoError)
+        goto done;
+
+    err = test(1);          /* 1 means interleaved. */
+    if (err != paNoError)
+        goto done;
+
+    err = test(0);          /* 0 means not interleaved. */
+    if (err != paNoError)
+        goto done;
+
+    printf("Test finished.\n");
+done:
+    if (err)
+        {
+        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));
+        }
+    Pa_Terminate();
+    return 0;
+}