diff options
Diffstat (limited to 'pd/portaudio_v18/pa_tests/patest_sync.c')
| -rw-r--r-- | pd/portaudio_v18/pa_tests/patest_sync.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/pd/portaudio_v18/pa_tests/patest_sync.c b/pd/portaudio_v18/pa_tests/patest_sync.c deleted file mode 100644 index c70fbb35..00000000 --- a/pd/portaudio_v18/pa_tests/patest_sync.c +++ /dev/null @@ -1,227 +0,0 @@ -/* - * $Id: patest_sync.c,v 1.1.1.1 2002/01/22 00:52:40 phil Exp $ - * patest_sync.c - * Test time stamping and synchronization of audio and video. - * A high latency is used so we can hear the difference in time. - * Random durations are used so we know we are hearing the right beep - * and not the one before or after. - * - * Sequence of events: - * Foreground requests a beep. - * Background randomly schedules a beep. - * Foreground waits for the beep to be heard based on Pa_StreamTime(). - * Foreground outputs video (printf) in sync with audio. - * Repeat. - * - * Author: Phil Burk http://www.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 NUM_BEEPS (6) -#define SAMPLE_RATE (44100) -#define FRAMES_PER_BUFFER (256) -#define BEEP_DURATION (1000) -#define LATENCY_MSEC (2000) -#define SLEEP_MSEC (10) -#define TIMEOUT_MSEC ((3 * LATENCY_MSEC) / (2 * SLEEP_MSEC)) -#define NUM_BUFFERS ((LATENCY_MSEC * SAMPLE_RATE) / (FRAMES_PER_BUFFER * 1000)) -#define STATE_BKG_IDLE (0) -#define STATE_BKG_PENDING (1) -#define STATE_BKG_BEEPING (2) -typedef struct -{ - float left_phase; - float right_phase; - int state; - int requestBeep; /* Set by foreground, cleared by background. */ - PaTimestamp beepTime; - int beepCount; -} -paTestData; -static unsigned long GenerateRandomNumber( void ); -/************************************************************/ -/* Calculate pseudo-random 32 bit number based on linear congruential method. */ -static unsigned long GenerateRandomNumber( void ) -{ - static unsigned long randSeed = 22222; /* Change this for different random sequences. */ - randSeed = (randSeed * 196314165) + 907633515; - return randSeed; -} -/* 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 ) -{ - /* Cast data passed through stream to our structure. */ - paTestData *data = (paTestData*)userData; - float *out = (float*)outputBuffer; - unsigned int i; - (void) inputBuffer; - - for( i=0; i<framesPerBuffer; i++ ) - { - switch( data->state ) - { - case STATE_BKG_IDLE: - /* Schedule beep at some random time in the future. */ - if( data->requestBeep ) - { - int random = GenerateRandomNumber() >> 14; - data->beepTime = outTime + (i + random + (SAMPLE_RATE/4)); - data->state = STATE_BKG_PENDING; - data->requestBeep = 0; - data->left_phase = data->right_phase = 0.0; - } - *out++ = 0.0; /* left */ - *out++ = 0.0; /* right */ - break; - case STATE_BKG_PENDING: - if( (outTime + i) >= data->beepTime ) - { - data->state = STATE_BKG_BEEPING; - data->beepCount = BEEP_DURATION; - } - *out++ = 0.0; /* left */ - *out++ = 0.0; /* right */ - break; - case STATE_BKG_BEEPING: - if( data->beepCount <= 0 ) - { - data->state = STATE_BKG_IDLE; - *out++ = 0.0; /* left */ - *out++ = 0.0; /* right */ - } - else - { - /* Play sawtooth wave. */ - *out++ = data->left_phase; /* left */ - *out++ = data->right_phase; /* right */ - /* Generate simple sawtooth phaser that ranges between -1.0 and 1.0. */ - data->left_phase += 0.01f; - /* When signal reaches top, drop back down. */ - if( data->left_phase >= 1.0f ) data->left_phase -= 2.0f; - /* higher pitch so we can distinguish left and right. */ - data->right_phase += 0.03f; - if( data->right_phase >= 1.0f ) data->right_phase -= 2.0f; - } - data->beepCount -= 1; - break; - default: - data->state = STATE_BKG_IDLE; - break; - } - } - return 0; -} -/*******************************************************************/ -int main(void); -int main(void) -{ - PortAudioStream *stream; - PaError err; - paTestData DATA; - int i, timeout; - PaTimestamp previousTime; - printf("PortAudio Test: you should see BEEP at the same time you hear it.\n"); - printf("Wait for a few seconds random delay between BEEPs.\n"); - printf("BEEP %d times.\n", NUM_BEEPS ); - /* Initialize our DATA for use by callback. */ - DATA.left_phase = DATA.right_phase = 0.0; - DATA.state = STATE_BKG_IDLE; - DATA.requestBeep = 0; - /* Initialize library before making any other calls. */ - err = Pa_Initialize(); - if( err != paNoError ) goto error; - /* Open an audio I/O stream. */ - err = Pa_OpenDefaultStream( - &stream, - 0, /* no input channels */ - 2, /* stereo output */ - paFloat32, /* 32 bit floating point output */ - SAMPLE_RATE, - FRAMES_PER_BUFFER, - NUM_BUFFERS, - patestCallback, - &DATA ); - if( err != paNoError ) goto error; - err = Pa_StartStream( stream ); - if( err != paNoError ) goto error; - previousTime = Pa_StreamTime( stream ); - for( i=0; i<NUM_BEEPS; i++ ) - { - /* Request a beep from background. */ - DATA.requestBeep = 1; - /* Wait for background to acknowledge request. */ - timeout = TIMEOUT_MSEC; - while( (DATA.requestBeep == 1) && (timeout-- > 0 ) ) Pa_Sleep(SLEEP_MSEC); - if( timeout <= 0 ) - { - fprintf( stderr, "Timed out waiting for background to acknowledge request.\n" ); - goto error; - } - /* Wait for scheduled beep time. */ - timeout = TIMEOUT_MSEC + (10000/SLEEP_MSEC); - while( (Pa_StreamTime( stream ) < DATA.beepTime) && (timeout-- > 0 ) ) - { - Pa_Sleep(SLEEP_MSEC); - } - if( timeout <= 0 ) - { - fprintf( stderr, "Timed out waiting for time. Now = %g, Beep for %g.\n", - Pa_StreamTime( stream ), DATA.beepTime ); - goto error; - } - /* Beep should be sounding now so print synchronized BEEP. */ - printf("BEEP"); - fflush(stdout); - printf(" at %d, delta = %d\n", - (long) DATA.beepTime, (long) (DATA.beepTime - previousTime) ); - fflush(stdout); - previousTime = DATA.beepTime; - } - err = Pa_StopStream( stream ); - if( err != paNoError ) 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; -} |