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1 files changed, 288 insertions, 0 deletions

diff --git a/pd/portaudio/pa_tests/patest_stop.c b/pd/portaudio/pa_tests/patest_stop.c
new file mode 100644
index 00000000..54e72ff7
--- /dev/null
+++ b/pd/portaudio/pa_tests/patest_stop.c
@@ -0,0 +1,288 @@
+/*
+ * $Id: patest_stop.c,v 1.1.1.1 2003-05-09 16:03:56 ggeiger Exp $
+ * patest_stop.c
+ *
+ * Test the three ways of stopping audio:
+ *    calling Pa_StopStream(),
+ *    calling Pa_AbortStream(),
+ *    and returning a 1 from the callback function.
+ *
+ * A long latency is set up so that you can hear the difference.
+ * Then a simple 8 note sequence is repeated twice.
+ * The program will print what you should hear.
+ *
+ * Author: Phil Burk <philburk@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.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ */
+#include <stdio.h>
+#include <math.h>
+#include "portaudio.h"
+#define OUTPUT_DEVICE       (Pa_GetDefaultOutputDevice())
+#define SLEEP_DUR           (200)
+#define SAMPLE_RATE         (44100)
+#define FRAMES_PER_BUFFER   (256)
+#define LATENCY_MSEC        (3000)
+#define FRAMES_PER_NOTE     (SAMPLE_RATE/2)
+#define MAX_REPEATS         (2)
+#define FUNDAMENTAL         (400.0f / SAMPLE_RATE)
+#define NOTE_0              (FUNDAMENTAL * 1.0f / 1.0f)
+#define NOTE_1              (FUNDAMENTAL * 5.0f / 4.0f)
+#define NOTE_2              (FUNDAMENTAL * 4.0f / 3.0f)
+#define NOTE_3              (FUNDAMENTAL * 3.0f / 2.0f)
+#define NOTE_4              (FUNDAMENTAL * 2.0f / 1.0f)
+#define MODE_FINISH    (0)
+#define MODE_STOP      (1)
+#define MODE_ABORT     (2)
+#ifndef M_PI
+#define M_PI  (3.14159265)
+#endif
+#define TABLE_SIZE   (400)
+typedef struct
+{
+    float  waveform[TABLE_SIZE + 1]; // add one for guard point for interpolation
+    float  phase_increment;
+    float  phase;
+    float *tune;
+    int    notesPerTune;
+    int    frameCounter;
+    int    noteCounter;
+    int    repeatCounter;
+    PaTimestamp    outTime;
+    int    stopMode;
+    int    done;
+}
+paTestData;
+/************* Prototypes *****************************/
+int TestStopMode( paTestData *data );
+float LookupWaveform( paTestData *data, float phase );
+/******************************************************
+ * Convert phase between 0.0 and 1.0 to waveform value 
+ * using linear interpolation.
+ */
+float LookupWaveform( paTestData *data, float phase )
+{
+    float fIndex = phase*TABLE_SIZE;
+    int   index = (int) fIndex;
+    float fract = fIndex - index;
+    float lo = data->waveform[index];
+    float hi = data->waveform[index+1];
+    float val = lo + fract*(hi-lo);
+    return val;
+}
+/* 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( void *inputBuffer, void *outputBuffer,
+                           unsigned long framesPerBuffer,
+                           PaTimestamp outTime, void *userData )
+{
+    paTestData *data = (paTestData*)userData;
+    float *out = (float*)outputBuffer;
+    float value;
+    unsigned int i = 0;
+    int finished = paContinue;
+    (void) outTime; /* Prevent unused variable warnings. */
+    (void) inputBuffer;
+
+    data->outTime = outTime;
+    if( !data->done )
+    {
+        for( i=0; i<framesPerBuffer; i++ )
+        {
+            /* Are we done with this note? */
+            if( data->frameCounter >= FRAMES_PER_NOTE )
+            {
+                data->noteCounter += 1;
+                data->frameCounter = 0;
+                /* Are we done with this tune? */
+                if( data->noteCounter >= data->notesPerTune )
+                {
+                    data->noteCounter = 0;
+                    data->repeatCounter += 1;
+                    /* Are we totally done? */
+                    if( data->repeatCounter >= MAX_REPEATS )
+                    {
+                        data->done = 1;
+                        if( data->stopMode == MODE_FINISH )
+                        {
+                            finished = paComplete;
+                            break;
+                        }
+                    }
+                }
+                data->phase_increment = data->tune[data->noteCounter];
+            }
+            value = LookupWaveform(data, data->phase);
+            *out++ = value;  /* left */
+            *out++ = value;  /* right */
+            data->phase += data->phase_increment;
+            if( data->phase >= 1.0f ) data->phase -= 1.0f;
+
+            data->frameCounter += 1;
+        }
+    }
+    /* zero remainder of final buffer */
+    for( ; i<framesPerBuffer; i++ )
+    {
+        *out++ = 0; /* left */
+        *out++ = 0; /* right */
+    }
+    return finished;
+}
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+    paTestData DATA;
+    int i;
+    float simpleTune[] = { NOTE_0, NOTE_1, NOTE_2, NOTE_3, NOTE_4, NOTE_3, NOTE_2, NOTE_1 };
+    printf("PortAudio Test: play song and test stopping. ask for %d latency\n", LATENCY_MSEC );
+    /* initialise sinusoidal wavetable */
+    for( i=0; i<TABLE_SIZE; i++ )
+    {
+        DATA.waveform[i] = (float) (
+                               (0.2 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. )) +
+                               (0.2 * sin( ((double)(3*i)/(double)TABLE_SIZE) * M_PI * 2. )) +
+                               (0.1 * sin( ((double)(5*i)/(double)TABLE_SIZE) * M_PI * 2. ))
+                           );
+    }
+    DATA.waveform[TABLE_SIZE] = DATA.waveform[0]; // set guard point
+    DATA.tune = &simpleTune[0];
+    DATA.notesPerTune = sizeof(simpleTune) / sizeof(float);
+    printf("Test MODE_FINISH - callback returns 1.\n");
+    printf("Should hear entire %d note tune repeated twice.\n", DATA.notesPerTune);
+    DATA.stopMode = MODE_FINISH;
+    if( TestStopMode( &DATA ) != paNoError )
+    {
+        printf("Test of MODE_FINISH failed!\n");
+        goto error;
+    }
+    printf("Test MODE_STOP - stop when song is done.\n");
+    printf("Should hear entire %d note tune repeated twice.\n", DATA.notesPerTune);
+    DATA.stopMode = MODE_STOP;
+    if( TestStopMode( &DATA ) != paNoError )
+    {
+        printf("Test of MODE_STOP failed!\n");
+        goto error;
+    }
+
+    printf("Test MODE_ABORT - abort immediately.\n");
+    printf("Should hear last repetition cut short by %d msec.\n", LATENCY_MSEC);
+    DATA.stopMode = MODE_ABORT;
+    if( TestStopMode( &DATA ) != paNoError )
+    {
+        printf("Test of MODE_ABORT failed!\n");
+        goto error;
+    }
+    return 0;
+error:
+    return 1;
+}
+
+int TestStopMode( paTestData *data )
+{
+    PaStream *stream;
+    PaError err;
+    data->done = 0;
+    data->phase = 0.0;
+    data->frameCounter = 0;
+    data->noteCounter = 0;
+    data->repeatCounter = 0;
+    data->phase_increment = data->tune[data->noteCounter];
+    err = Pa_Initialize();
+    if( err != paNoError ) goto error;
+    err = Pa_OpenStream(
+              &stream,
+              paNoDevice,/* default input device */
+              0,              /* no input */
+              paFloat32,  /* 32 bit floating point input */
+              0, 
+              NULL,
+              OUTPUT_DEVICE,
+              2,          /* stereo output */
+              paFloat32,      /* 32 bit floating point output */
+              LATENCY_MSEC,
+              NULL,
+              SAMPLE_RATE,
+              FRAMES_PER_BUFFER,            /* 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;
+
+    if( data->stopMode == MODE_FINISH )
+    {
+        while( Pa_IsStreamActive( stream ) )
+        {
+            /*printf("outTime = %g, note# = %d, repeat# = %d\n", data->outTime,
+             data->noteCounter, data->repeatCounter  );
+            fflush(stdout); /**/
+            Pa_Sleep( SLEEP_DUR );
+        }
+    }
+    else
+    {
+        while( data->repeatCounter < MAX_REPEATS )
+        {
+            /*printf("outTime = %g, note# = %d, repeat# = %d\n", data->outTime,
+             data->noteCounter, data->repeatCounter  );
+            fflush(stdout); /**/
+            Pa_Sleep( SLEEP_DUR );
+        }
+    }
+
+    if( data->stopMode == MODE_ABORT )
+    {
+        printf("Call Pa_AbortStream()\n");
+        err = Pa_AbortStream( stream );
+    }
+    else
+    {
+        printf("Call Pa_StopStream()\n");
+        err = Pa_StopStream( stream );
+    }
+    if( err != paNoError ) goto error;
+
+    printf("Call Pa_CloseStream()\n"); fflush(stdout);
+    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;
+}