comparison src/portaudio_20161030/test/patest_sine8.c @ 140:59a8758c56b1

Add source for PortAudio stable v190600_20161030

+/** @file patest_sine8.c
+	@ingroup test_src
+	@brief Test 8 bit data: play a sine wave for several seconds.
+	@author Ross Bencina <[e-mail]>
+*/
+/*
+ * $Id$
+ *
+ * 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 NUM_SECONDS   (8)
+#define SAMPLE_RATE   (44100)
+#define TABLE_SIZE    (200)
+#define TEST_UNSIGNED (0)
+
+#if TEST_UNSIGNED
+#define TEST_FORMAT   paUInt8
+typedef unsigned char sample_t;
+#define SILENCE       ((sample_t)0x80)
+#else
+#define TEST_FORMAT   paInt8
+typedef char          sample_t;
+#define SILENCE       ((sample_t)0x00)
+#endif
+
+#ifndef M_PI
+#define M_PI (3.14159265)
+#endif
+
+typedef struct
+{
+    sample_t sine[TABLE_SIZE];
+    int left_phase;
+    int right_phase;
+    unsigned int framesToGo;
+}
+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;
+    sample_t *out = (sample_t*)outputBuffer;
+    int i;
+    int framesToCalc;
+    int finished = 0;
+    (void) inputBuffer; /* Prevent unused variable warnings. */
+
+    if( data->framesToGo < framesPerBuffer )
+    {
+        framesToCalc = data->framesToGo;
+        data->framesToGo = 0;
+        finished = 1;
+    }
+    else
+    {
+        framesToCalc = framesPerBuffer;
+        data->framesToGo -= framesPerBuffer;
+    }
+
+    for( i=0; i<framesToCalc; i++ )
+    {
+        *out++ = data->sine[data->left_phase];  /* left */
+        *out++ = data->sine[data->right_phase];  /* right */
+        data->left_phase += 1;
+        if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
+        data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
+        if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
+    }
+    /* zero remainder of final buffer */
+    for( ; i<(int)framesPerBuffer; i++ )
+    {
+        *out++ = SILENCE; /* left */
+        *out++ = SILENCE; /* right */
+    }
+    return finished;
+}
+
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+    PaStreamParameters  outputParameters;
+    PaStream*           stream;
+    PaError             err;
+    paTestData          data;
+    PaTime              streamOpened;
+    int                 i, totalSamps;
+
+#if TEST_UNSIGNED
+    printf("PortAudio Test: output UNsigned 8 bit sine wave.\n");
+#else
+    printf("PortAudio Test: output signed 8 bit sine wave.\n");
+#endif
+    /* initialise sinusoidal wavetable */
+    for( i=0; i<TABLE_SIZE; i++ )
+    {
+        data.sine[i] = SILENCE + (char) (127.0 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ));
+    }
+    data.left_phase = data.right_phase = 0;
+    data.framesToGo = totalSamps =  NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
+
+    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 = TEST_FORMAT;
+    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
+    outputParameters.hostApiSpecificStreamInfo = NULL;
+    err = Pa_OpenStream( &stream,
+                         NULL,      /* No input. */
+                         &outputParameters,
+                         SAMPLE_RATE,
+                         256,       /* 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;
+
+    streamOpened = Pa_GetStreamTime( stream ); /* Time in seconds when stream was opened (approx). */
+
+    err = Pa_StartStream( stream );
+    if( err != paNoError )
+        goto error;
+
+    /* Watch until sound is halfway finished. */
+    /* (Was ( Pa_StreamTime( stream ) < (totalSamps/2) ) in V18. */
+    while( (Pa_GetStreamTime( stream ) - streamOpened) < (PaTime)NUM_SECONDS / 2.0 )
+        Pa_Sleep(10);
+
+    /* Stop sound. */
+    printf("Stopping Stream.\n");
+    err = Pa_StopStream( stream );
+    if( err != paNoError )
+        goto error;
+
+    printf("Pause for 2 seconds.\n");
+    Pa_Sleep( 2000 );
+
+    printf("Starting again.\n");
+    err = Pa_StartStream( stream );
+    if( err != paNoError )
+        goto error;
+
+    printf("Waiting for sound to finish.\n");
+
+    while( ( err = Pa_IsStreamActive( stream ) ) == 1 )
+        Pa_Sleep(100);
+    if( err < 0 )
+        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 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;
+}