diff options
Diffstat (limited to '3rdparty/portaudio/test/patest_sine_time.c')
| -rw-r--r-- | 3rdparty/portaudio/test/patest_sine_time.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/3rdparty/portaudio/test/patest_sine_time.c b/3rdparty/portaudio/test/patest_sine_time.c new file mode 100644 index 0000000..c1d6097 --- /dev/null +++ b/3rdparty/portaudio/test/patest_sine_time.c @@ -0,0 +1,219 @@ +/** @file patest_sine_time.c + @ingroup test_src + @brief Play a sine wave for several seconds, pausing in the middle. + Uses the Pa_GetStreamTime() call. + @author Ross Bencina <rossb@audiomulch.com> + @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" +#include "pa_util.h" + +#define NUM_SECONDS (8) +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (64) + +#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 PaTime 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( const void *inputBuffer, void *outputBuffer, + unsigned long framesPerBuffer, + const PaStreamCallbackTimeInfo* timeInfo, + PaStreamCallbackFlags statusFlags, + 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) statusFlags; /* Prevent unused variable warnings. */ + (void) inputBuffer; + + data->outTime = timeInfo->outputBufferDacTime; + + 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 ) +{ + PaTime 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 = %8.4f, outTime = %8.4f, latency = %8.4f\n", + streamTime, outTime, latency ); + } + fflush(stdout); +} + +/*******************************************************************/ +int main(void); +int main(void) +{ + PaStreamParameters outputParameters; + PaStream *stream; + PaError err; + paTestData data; + PaTime startTime; + + printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER); + + data.left_phase = data.right_phase = 0; + + err = Pa_Initialize(); + if( err != paNoError ) goto error; + + outputParameters.device = Pa_GetDefaultOutputDevice(); /* default 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 = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; + outputParameters.hostApiSpecificStreamInfo = NULL; + + 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 */ + 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; + + startTime = Pa_GetStreamTime( stream ); + + do + { + ReportStreamTime( stream, &data ); + Pa_Sleep(100); + } while( (Pa_GetStreamTime( stream ) - startTime) < (NUM_SECONDS/2) ); + + /* Stop sound for 2 seconds. */ + 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; + + startTime = Pa_GetStreamTime( stream ); + + printf("Play until sound is finished.\n"); fflush(stdout); + do + { + ReportStreamTime( stream, &data ); + Pa_Sleep(100); + } while( (Pa_GetStreamTime( stream ) - startTime) < (NUM_SECONDS/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 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; +} |