diff options
Diffstat (limited to '3rdparty/portaudio/test/patest_sine8.c')
| -rw-r--r-- | 3rdparty/portaudio/test/patest_sine8.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/3rdparty/portaudio/test/patest_sine8.c b/3rdparty/portaudio/test/patest_sine8.c new file mode 100644 index 0000000..82de69d --- /dev/null +++ b/3rdparty/portaudio/test/patest_sine8.c @@ -0,0 +1,216 @@ +/** @file patest_sine8.c + @ingroup test_src + @brief Test 8 bit data: play a sine wave for several seconds. + @author Ross Bencina <rossb@audiomulch.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 NUM_SECONDS (8) +#define SAMPLE_RATE (44100) +#define TABLE_SIZE (200) +#define TEST_UNSIGNED (0) + +#if TEST_UNSIGNED +#define TEST_FORMAT paUInt8 +typedef unsigned char sample_t; +#define SILENCE ((sample_t)0x80) +#else +#define TEST_FORMAT paInt8 +typedef char sample_t; +#define SILENCE ((sample_t)0x00) +#endif + +#ifndef M_PI +#define M_PI (3.14159265) +#endif + +typedef struct +{ + sample_t sine[TABLE_SIZE]; + int left_phase; + int right_phase; + unsigned int framesToGo; +} +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; + sample_t *out = (sample_t*)outputBuffer; + int i; + int framesToCalc; + int finished = 0; + (void) inputBuffer; /* Prevent unused variable warnings. */ + + if( data->framesToGo < framesPerBuffer ) + { + framesToCalc = data->framesToGo; + data->framesToGo = 0; + finished = 1; + } + else + { + framesToCalc = framesPerBuffer; + data->framesToGo -= framesPerBuffer; + } + + for( i=0; i<framesToCalc; i++ ) + { + *out++ = data->sine[data->left_phase]; /* left */ + *out++ = data->sine[data->right_phase]; /* right */ + data->left_phase += 1; + if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE; + data->right_phase += 3; /* higher pitch so we can distinguish left and right. */ + if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE; + } + /* zero remainder of final buffer */ + for( ; i<(int)framesPerBuffer; i++ ) + { + *out++ = SILENCE; /* left */ + *out++ = SILENCE; /* right */ + } + return finished; +} + +/*******************************************************************/ +int main(void); +int main(void) +{ + PaStreamParameters outputParameters; + PaStream* stream; + PaError err; + paTestData data; + PaTime streamOpened; + int i, totalSamps; + +#if TEST_UNSIGNED + printf("PortAudio Test: output UNsigned 8 bit sine wave.\n"); +#else + printf("PortAudio Test: output signed 8 bit sine wave.\n"); +#endif + /* initialise sinusoidal wavetable */ + for( i=0; i<TABLE_SIZE; i++ ) + { + data.sine[i] = SILENCE + (char) (127.0 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. )); + } + data.left_phase = data.right_phase = 0; + data.framesToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */ + + 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 = TEST_FORMAT; + outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; + outputParameters.hostApiSpecificStreamInfo = NULL; + err = Pa_OpenStream( &stream, + NULL, /* No input. */ + &outputParameters, + SAMPLE_RATE, + 256, /* 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; + + streamOpened = Pa_GetStreamTime( stream ); /* Time in seconds when stream was opened (approx). */ + + err = Pa_StartStream( stream ); + if( err != paNoError ) + goto error; + + /* Watch until sound is halfway finished. */ + /* (Was ( Pa_StreamTime( stream ) < (totalSamps/2) ) in V18. */ + while( (Pa_GetStreamTime( stream ) - streamOpened) < (PaTime)NUM_SECONDS / 2.0 ) + Pa_Sleep(10); + + /* Stop sound. */ + printf("Stopping Stream.\n"); + err = Pa_StopStream( stream ); + if( err != paNoError ) + goto error; + + printf("Pause for 2 seconds.\n"); + Pa_Sleep( 2000 ); + + printf("Starting again.\n"); + err = Pa_StartStream( stream ); + if( err != paNoError ) + goto error; + + printf("Waiting for sound to finish.\n"); + + while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) + Pa_Sleep(100); + if( err < 0 ) + 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; +} |