comparison src/portaudio/test/patest_prime.c @ 4:e13257ea84a4

Add bzip2, zlib, liblo, portaudio sources

+/** @file patest_prime.c
+	@ingroup test_src
+	@brief Test stream priming mode.
+	@author Ross Bencina http://www.audiomulch.com/~rossb
+*/
+
+/*
+ * $Id: patest_prime.c 1371 2008-03-11 14:27:26Z bjornroche $
+ *
+ * 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_BEEPS           (3)
+#define SAMPLE_RATE         (44100)
+#define SAMPLE_PERIOD       (1.0/44100.0)
+#define FRAMES_PER_BUFFER   (256)
+#define BEEP_DURATION       (400)
+#define IDLE_DURATION       (SAMPLE_RATE*2)      /* 2 seconds */
+#define SLEEP_MSEC          (50)
+
+#define STATE_BKG_IDLE      (0)
+#define STATE_BKG_BEEPING   (1)
+
+typedef struct
+{
+    float        leftPhase;
+    float        rightPhase;
+    int          state;
+    int          beepCountdown;
+    int          idleCountdown;
+}
+paTestData;
+
+static void InitializeTestData( paTestData *testData )
+{
+    testData->leftPhase = 0;
+    testData->rightPhase = 0;
+    testData->state = STATE_BKG_BEEPING;
+    testData->beepCountdown = BEEP_DURATION;
+    testData->idleCountdown = IDLE_DURATION;
+}
+
+/* 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 )
+{
+    /* Cast data passed through stream to our structure. */
+    paTestData *data = (paTestData*)userData;
+    float *out = (float*)outputBuffer;
+    unsigned int i;
+    int result = paContinue;
+
+    /* supress unused parameter warnings */
+    (void) inputBuffer;
+    (void) timeInfo;
+    (void) statusFlags;
+
+    for( i=0; i<framesPerBuffer; i++ )
+    {
+        switch( data->state )
+        {
+        case STATE_BKG_IDLE:
+            *out++ = 0.0;  /* left */
+            *out++ = 0.0;  /* right */
+            --data->idleCountdown;
+            
+            if( data->idleCountdown <= 0 ) result = paComplete;
+            break;
+
+        case STATE_BKG_BEEPING:
+            if( data->beepCountdown <= 0 )
+            {
+                data->state = STATE_BKG_IDLE;
+                *out++ = 0.0;  /* left */
+                *out++ = 0.0;  /* right */
+            }
+            else
+            {
+                /* Play sawtooth wave. */
+                *out++ = data->leftPhase;  /* left */
+                *out++ = data->rightPhase;  /* right */
+                /* Generate simple sawtooth phaser that ranges between -1.0 and 1.0. */
+                data->leftPhase += 0.01f;
+                /* When signal reaches top, drop back down. */
+                if( data->leftPhase >= 1.0f ) data->leftPhase -= 2.0f;
+                /* higher pitch so we can distinguish left and right. */
+                data->rightPhase += 0.03f;
+                if( data->rightPhase >= 1.0f ) data->rightPhase -= 2.0f;
+            }
+            --data->beepCountdown;
+            break;
+        }
+    }
+    
+    return result;
+}
+
+/*******************************************************************/
+static PaError DoTest( int flags )
+{
+    PaStream *stream;
+    PaError    err = paNoError;
+    paTestData data;
+    PaStreamParameters outputParameters;
+
+    InitializeTestData( &data );       
+
+    outputParameters.device = Pa_GetDefaultOutputDevice();
+    if (outputParameters.device == paNoDevice) {
+      fprintf(stderr,"Error: No default output device.\n");
+      goto error;
+    }
+    outputParameters.channelCount = 2;
+    outputParameters.hostApiSpecificStreamInfo = NULL;
+    outputParameters.sampleFormat = paFloat32;
+    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;
+
+    /* Open an audio I/O stream. */
+    err = Pa_OpenStream(
+        &stream,
+        NULL,                         /* no input */
+        &outputParameters,
+        SAMPLE_RATE,
+        FRAMES_PER_BUFFER,            /* frames per buffer */
+        paClipOff | flags,      /* 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;
+
+    printf("hear \"BEEP\"\n" );
+    fflush(stdout);
+
+    while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(SLEEP_MSEC);
+    if( err < 0 ) goto error;
+
+    err = Pa_StopStream( stream );
+    if( err != paNoError ) goto error;
+
+    err = Pa_CloseStream( stream );
+    if( err != paNoError ) goto error;
+
+    return err;
+error:
+    return err;
+}
+
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+    PaError    err = paNoError;
+    int        i;
+
+    /* Initialize library before making any other calls. */
+    err = Pa_Initialize();
+    if( err != paNoError ) goto error;
+    
+    printf("PortAudio Test: Testing stream playback with no priming.\n");
+    printf("PortAudio Test: you should see BEEP before you hear it.\n");
+    printf("BEEP %d times.\n", NUM_BEEPS );
+
+    for( i=0; i< NUM_BEEPS; ++i )
+    {
+        err = DoTest( 0 );
+        if( err != paNoError )
+            goto error;
+    }
+
+    printf("PortAudio Test: Testing stream playback with priming.\n");
+    printf("PortAudio Test: you should see BEEP around the same time you hear it.\n");
+    for( i=0; i< NUM_BEEPS; ++i )
+    {
+        err = DoTest( paPrimeOutputBuffersUsingStreamCallback );
+        if( err != paNoError )
+            goto error;
+    }
+
+    printf("Test finished.\n");
+
+    Pa_Terminate();
+    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;
+}