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-rw-r--r--portaudio/test/patest_stop.c324
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diff --git a/portaudio/test/patest_stop.c b/portaudio/test/patest_stop.c
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--- a/portaudio/test/patest_stop.c
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-/** @file patest_stop.c
- @ingroup test_src
- @brief Test different ways of stopping audio.
-
- 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>
-*/
-/*
- * $Id$
- *
- * 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 OUTPUT_DEVICE (Pa_GetDefaultOutputDevice())
-#define SLEEP_DUR (200)
-#define SAMPLE_RATE (44100)
-#define FRAMES_PER_BUFFER (256)
-#define LATENCY_SECONDS (3.f)
-#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;
- PaTime 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( const void *inputBuffer, void *outputBuffer,
- unsigned long framesPerBuffer,
- const PaStreamCallbackTimeInfo* timeInfo,
- PaStreamCallbackFlags statusFlags,
- void *userData )
-{
- paTestData *data = (paTestData*)userData;
- float *out = (float*)outputBuffer;
- float value;
- unsigned int i = 0;
- int finished = paContinue;
-
- (void) inputBuffer; /* Prevent unused variable warnings. */
- (void) timeInfo;
- (void) statusFlags;
-
-
- /* 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 %f seconds latency\n", LATENCY_SECONDS );
- /* 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 %f seconds.\n", LATENCY_SECONDS);
- 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 )
-{
- PaStreamParameters outputParameters;
- 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;
-
- outputParameters.device = OUTPUT_DEVICE;
- if (outputParameters.device == paNoDevice) {
- fprintf(stderr,"Error: No default output device.\n");
- goto error;
- }
- outputParameters.channelCount = 2; /* stereo output */
- outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
- outputParameters.suggestedLatency = LATENCY_SECONDS;
- outputParameters.hostApiSpecificStreamInfo = NULL;
-
- err = Pa_OpenStream(
- &stream,
- NULL, /* no input */
- &outputParameters,
- 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( ( err = Pa_IsStreamActive( stream ) ) == 1 )
- {
- /*printf("outTime = %g, note# = %d, repeat# = %d\n", data->outTime,
- data->noteCounter, data->repeatCounter );
- fflush(stdout); */
- Pa_Sleep( SLEEP_DUR );
- }
- if( err < 0 ) goto error;
- }
- 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 occurred while using the portaudio stream\n" );
- fprintf( stderr, "Error number: %d\n", err );
- fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
- return err;
-}
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