diff options
Diffstat (limited to '3rdparty/portaudio/test/patest_write_stop.c')
| -rw-r--r-- | 3rdparty/portaudio/test/patest_write_stop.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/3rdparty/portaudio/test/patest_write_stop.c b/3rdparty/portaudio/test/patest_write_stop.c new file mode 100644 index 0000000..855923f --- /dev/null +++ b/3rdparty/portaudio/test/patest_write_stop.c @@ -0,0 +1,165 @@ +/** @file patest_write_stop.c + @brief Play a few seconds of silence followed by a few cycles of a sine wave. Tests to make sure that pa_StopStream() completes playback in blocking I/O + @author Bjorn Roche of XO Audio (www.xoaudio.com) + @author Ross Bencina + @author Phil Burk +*/ +/* + * $Id$ + * + * 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 NUM_SECONDS (5) +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (1024) + +#ifndef M_PI +#define M_PI (3.14159265) +#endif + +#define TABLE_SIZE (200) + + +int main(void); +int main(void) +{ + PaStreamParameters outputParameters; + PaStream *stream; + PaError err; + float buffer[FRAMES_PER_BUFFER][2]; /* stereo output buffer */ + float sine[TABLE_SIZE]; /* sine wavetable */ + int left_phase = 0; + int right_phase = 0; + int left_inc = 1; + int right_inc = 3; /* higher pitch so we can distinguish left and right. */ + int i, j; + int bufferCount; + const int framesBy2 = FRAMES_PER_BUFFER >> 1; + const float framesBy2f = (float) framesBy2 ; + + + printf( "PortAudio Test: output silence, followed by one buffer of a ramped sine wave. SR = %d, BufSize = %d\n", + SAMPLE_RATE, FRAMES_PER_BUFFER); + + /* initialise sinusoidal wavetable */ + for( i=0; i<TABLE_SIZE; i++ ) + { + sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); + } + + + err = Pa_Initialize(); + if( err != paNoError ) goto error; + + outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ + outputParameters.channelCount = 2; /* stereo output */ + outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ + outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency * 5; + outputParameters.hostApiSpecificStreamInfo = NULL; + + /* open the stream */ + err = Pa_OpenStream( + &stream, + NULL, /* no input */ + &outputParameters, + SAMPLE_RATE, + FRAMES_PER_BUFFER, + paClipOff, /* we won't output out of range samples so don't bother clipping them */ + NULL, /* no callback, use blocking API */ + NULL ); /* no callback, so no callback userData */ + if( err != paNoError ) goto error; + + /* start the stream */ + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + printf("Playing %d seconds of silence followed by one buffer of a ramped sinusoid.\n", NUM_SECONDS ); + + bufferCount = ((NUM_SECONDS * SAMPLE_RATE) / FRAMES_PER_BUFFER); + + /* clear buffer */ + for( j=0; j < FRAMES_PER_BUFFER; j++ ) + { + buffer[j][0] = 0; /* left */ + buffer[j][1] = 0; /* right */ + } + /* play the silent buffer a bunch o' times */ + for( i=0; i < bufferCount; i++ ) + { + err = Pa_WriteStream( stream, buffer, FRAMES_PER_BUFFER ); + if( err != paNoError ) goto error; + } + /* play a non-silent buffer once */ + for( j=0; j < FRAMES_PER_BUFFER; j++ ) + { + float ramp = 1; + if( j < framesBy2 ) + ramp = j / framesBy2f; + else + ramp = (FRAMES_PER_BUFFER - j) / framesBy2f ; + + buffer[j][0] = sine[left_phase] * ramp; /* left */ + buffer[j][1] = sine[right_phase] * ramp; /* right */ + left_phase += left_inc; + if( left_phase >= TABLE_SIZE ) left_phase -= TABLE_SIZE; + right_phase += right_inc; + if( right_phase >= TABLE_SIZE ) right_phase -= TABLE_SIZE; + } + err = Pa_WriteStream( stream, buffer, FRAMES_PER_BUFFER ); + if( err != paNoError ) goto error; + + /* stop stream, close, and terminate */ + 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 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; +} |