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authorGuenter Geiger <ggeiger@users.sourceforge.net>2003-05-09 16:04:00 +0000
committerGuenter Geiger <ggeiger@users.sourceforge.net>2003-05-09 16:04:00 +0000
commit9c0e19a3be2288db79e2502e5fa450c3e20a668d (patch)
treeca97ce615e037a533304fc4660dcf372ca3b9cd6 /pd/portaudio/pa_tests/patest_sine_time.c
parentef50dd62804d54af7da18d8bd8413c0dccd729b8 (diff)
This commit was generated by cvs2svn to compensate for changes in r610,
which included commits to RCS files with non-trunk default branches. svn path=/trunk/; revision=611
Diffstat (limited to 'pd/portaudio/pa_tests/patest_sine_time.c')
-rw-r--r--pd/portaudio/pa_tests/patest_sine_time.c194
1 files changed, 194 insertions, 0 deletions
diff --git a/pd/portaudio/pa_tests/patest_sine_time.c b/pd/portaudio/pa_tests/patest_sine_time.c
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+/*
+ * $Id: patest_sine_time.c,v 1.1.1.1 2003-05-09 16:03:56 ggeiger Exp $
+ * patest_sine_time.c
+ * Play a sine wave using the Portable Audio api for several seconds.
+ * Pausing in the middle.
+ * use the Pa_GetStreamTime() and Pa_IsStreamActive() calls.
+ *
+ * Authors:
+ * Ross Bencina <rossb@audiomulch.com>
+ * Phil Burk <philburk@softsynth.com>
+ *
+ * This program uses the PortAudio Portable Audio Library.
+ * For more information see: http://www.audiomulch.com/portaudio/
+ * 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"
+#include "pa_util.h"
+#define NUM_SECONDS (8)
+#define SAMPLE_RATE (44100)
+#define FRAMES_PER_BUFFER (64)
+#define NUM_BUFFERS (0)
+
+#ifndef M_PI
+#define M_PI (3.14159265)
+#endif
+#define TWOPI (M_PI * 2.0)
+
+#define TABLE_SIZE (200)
+typedef struct
+{
+ double left_phase;
+ double right_phase;
+ volatile PaTimestamp outTime;
+}
+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( void *inputBuffer, void *outputBuffer,
+ unsigned long framesPerBuffer,
+ PaTimestamp outTime, void *userData )
+{
+ paTestData *data = (paTestData*)userData;
+ float *out = (float*)outputBuffer;
+ unsigned int i;
+
+ double left_phaseInc = 0.02;
+ double right_phaseInc = 0.06;
+
+ double left_phase = data->left_phase;
+ double right_phase = data->right_phase;
+
+ (void) outTime; /* Prevent unused variable warnings. */
+ (void) inputBuffer;
+ data->outTime = outTime;\
+
+ for( i=0; i<framesPerBuffer; i++ )
+ {
+ left_phase += left_phaseInc;
+ if( left_phase > TWOPI ) left_phase -= TWOPI;
+ *out++ = (float) sin( left_phase );
+
+ right_phase += right_phaseInc;
+ if( right_phase > TWOPI ) right_phase -= TWOPI;
+ *out++ = (float) sin( right_phase );
+ }
+
+ data->left_phase = left_phase;
+ data->right_phase = right_phase;
+
+ return paContinue;
+}
+/*******************************************************************/
+static void ReportStreamTime( PaStream *stream, paTestData *data );
+static void ReportStreamTime( PaStream *stream, paTestData *data )
+{
+ PaTimestamp streamTime, latency, outTime;
+
+ streamTime = Pa_GetStreamTime( stream );
+ outTime = data->outTime;
+ if( outTime < 0.0 )
+ {
+ printf("Stream time = %8.1f\n", streamTime );
+ }
+ else
+ {
+ latency = outTime - streamTime;
+ printf("Stream time = %8.1f, outTime = %8.1f, latency = %8.1f\n",
+ streamTime, outTime, latency );
+ }
+ fflush(stdout);
+}
+
+/*******************************************************************/
+int main(void);
+int main(void)
+{
+ PaStream *stream;
+ PaError err;
+ paTestData DATA;
+ int totalSamps;
+ printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER);
+ DATA.left_phase = DATA.right_phase = 0;
+ totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
+ 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, /* default latency */
+ NULL,
+ Pa_GetDefaultOutputDevice(), /* default output device */
+ 2, /* stereo output */
+ paFloat32, /* 32 bit floating point output */
+ 0, /* default latency */
+ 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;
+
+ /* Watch until sound is halfway finished. */
+ printf("Play for %d seconds.\n", NUM_SECONDS/2 ); fflush(stdout);
+
+ DATA.outTime = -1.0; // mark time for callback as undefined
+ err = Pa_StartStream( stream );
+ if( err != paNoError ) goto error;
+ do
+ {
+ ReportStreamTime( stream, &DATA );
+ Pa_Sleep(100);
+ } while( Pa_GetStreamTime( stream ) < (totalSamps/2) );
+
+ /* Stop sound until ENTER hit. */
+ err = Pa_StopStream( stream );
+ if( err != paNoError ) goto error;
+ printf("Pause for 2 seconds.\n"); fflush(stdout);
+ Pa_Sleep( 2000 );
+
+ DATA.outTime = -1.0; // mark time for callback as undefined
+ err = Pa_StartStream( stream );
+ if( err != paNoError ) goto error;
+
+ printf("Play until sound is finished.\n"); fflush(stdout);
+ do
+ {
+ ReportStreamTime( stream, &DATA );
+ Pa_Sleep(100);
+ } while( Pa_GetStreamTime( stream ) < (totalSamps/2) );
+
+ 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;
+}