diff options
Diffstat (limited to 'pd/portaudio_v18/pa_tests/patest_sine8.c')
| -rw-r--r-- | pd/portaudio_v18/pa_tests/patest_sine8.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/pd/portaudio_v18/pa_tests/patest_sine8.c b/pd/portaudio_v18/pa_tests/patest_sine8.c new file mode 100644 index 00000000..36cf863a --- /dev/null +++ b/pd/portaudio_v18/pa_tests/patest_sine8.c @@ -0,0 +1,184 @@ +/* + * $Id: patest_sine8.c,v 1.1.1.1 2002/01/22 00:52:38 phil Exp $ + * patest_sine8.c + * Play a sine wave using the Portable Audio api for several seconds. + * Test 8 bit data. + * + * Author: Ross Bencina <rossb@audiomulch.com> + * + * This program uses the PortAudio Portable Audio Library. + * For more information see: http://www.audiomulch.com/portaudio/ + * 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_SECONDS (8) +#define SAMPLE_RATE (44100) +#define TEST_UNSIGNED (1) +#if TEST_UNSIGNED +#define TEST_FORMAT paUInt8 +#else +#define TEST_FORMAT paInt8 +#endif +#ifndef M_PI +#define M_PI (3.14159265) +#endif +#define TABLE_SIZE (200) +typedef struct +{ +#if TEST_UNSIGNED + unsigned char sine[TABLE_SIZE]; +#else + char sine[TABLE_SIZE]; +#endif + 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( void *inputBuffer, void *outputBuffer, + unsigned long framesPerBuffer, + PaTimestamp outTime, void *userData ) +{ + paTestData *data = (paTestData*)userData; + char *out = (char*)outputBuffer; + int i; + int framesToCalc; + int finished = 0; + (void) outTime; /* Prevent unused variable warnings. */ + (void) inputBuffer; + + 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++ ) + { +#if TEST_UNSIGNED + *out++ = (unsigned char) 0x80; /* left */ + *out++ = (unsigned char) 0x80; /* right */ +#else + *out++ = 0; /* left */ + *out++ = 0; /* right */ +#endif + + } + return finished; +} +/*******************************************************************/ +int main(void); +int main(void) +{ + PortAudioStream *stream; + PaError err; + paTestData data; + int i; + int 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] = (char) (127.0 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. )); +#if TEST_UNSIGNED + data.sine[i] += (unsigned char) 0x80; +#endif + + } + 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; + err = Pa_OpenStream( + &stream, + paNoDevice,/* default input device */ + 0, /* no input */ + TEST_FORMAT, + NULL, + Pa_GetDefaultOutputDeviceID(), /* default output device */ + 2, /* stereo output */ + TEST_FORMAT, + NULL, + SAMPLE_RATE, + 256, /* frames per buffer */ + 0, /* number of buffers, if zero then use default minimum */ + 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; + /* Watch until sound is halfway finished. */ + while( Pa_StreamTime( stream ) < (totalSamps/2) ) Pa_Sleep(10); + /* Stop sound until ENTER hit. */ + err = Pa_StopStream( stream ); + if( err != paNoError ) goto error; + printf("Pause for 2 seconds.\n"); + Pa_Sleep( 2000 ); + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + printf("Waiting for sound to finish.\n"); + while( Pa_StreamActive( stream ) ) Pa_Sleep(10); + 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; +} |