diff options
Diffstat (limited to 'pd/portaudio_v18/pa_tests/debug_sine_formats.c')
| -rw-r--r-- | pd/portaudio_v18/pa_tests/debug_sine_formats.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/pd/portaudio_v18/pa_tests/debug_sine_formats.c b/pd/portaudio_v18/pa_tests/debug_sine_formats.c new file mode 100644 index 00000000..c331dde3 --- /dev/null +++ b/pd/portaudio_v18/pa_tests/debug_sine_formats.c @@ -0,0 +1,202 @@ +/* + * $Id: debug_sine_formats.c,v 1.1 2002/03/21 00:44:35 philburk Exp $ + * patest_sine_formats.c + * Play a sine wave using the Portable Audio api for several seconds. + * Test various data formats. + * + * Author: Phil Burk + * + * 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 (10) +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (256) + +#define LEFT_FREQ (SAMPLE_RATE/512.0) /* So we hit 1.0 */ +#define RIGHT_FREQ (500.0) + +#define AMPLITUDE (1.0) + +/* Select ONE format for testing. */ +#define TEST_UINT8 (1) +#define TEST_INT8 (0) +#define TEST_INT16 (0) +#define TEST_FLOAT32 (0) + +#if TEST_UINT8 +#define TEST_FORMAT paUInt8 +typedef unsigned char SAMPLE_t; +#define SAMPLE_ZERO (0x80) +#define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(127.0 * (x))) +#define FORMAT_NAME "Unsigned 8 Bit" + +#elif TEST_INT8 +#define TEST_FORMAT paInt8 +typedef char SAMPLE_t; +#define SAMPLE_ZERO (0) +#define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(127.0 * (x))) +#define FORMAT_NAME "Signed 8 Bit" + +#elif TEST_INT16 +#define TEST_FORMAT paInt16 +typedef short SAMPLE_t; +#define SAMPLE_ZERO (0) +#define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(32767 * (x))) +#define FORMAT_NAME "Signed 16 Bit" + +#elif TEST_FLOAT32 +#define TEST_FORMAT paFloat32 +typedef float SAMPLE_t; +#define SAMPLE_ZERO (0.0) +#define DOUBLE_TO_SAMPLE(x) ((SAMPLE_t)(x)) +#define FORMAT_NAME "Float 32 Bit" +#endif + +#ifndef M_PI +#define M_PI (3.14159265) +#endif + + +typedef struct +{ + double left_phase; + double 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; + SAMPLE_t *out = (SAMPLE_t *)outputBuffer; + SAMPLE_t sample; + 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++ ) + { + data->left_phase += (LEFT_FREQ / SAMPLE_RATE); + if( data->left_phase > 1.0) data->left_phase -= 1.0; + sample = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->left_phase * M_PI * 2. ))); /**/ + *out++ = sample; +/* *out++ = sample; /**/ +/* *out++ = 0; /**/ + + data->right_phase += (RIGHT_FREQ / SAMPLE_RATE); + if( data->right_phase > 1.0) data->right_phase -= 1.0; + *out++ = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->right_phase * M_PI * 2. ))); /**/ +/* *out++ = 0; /* */ + } + /* zero remainder of final buffer */ + for( ; i<(int)framesPerBuffer; i++ ) + { + *out++ = SAMPLE_ZERO; /* left */ + *out++ = SAMPLE_ZERO; /* right */ + } + return finished; +} +/*******************************************************************/ +int main(void); +int main(void) +{ + PortAudioStream *stream; + PaError err; + paTestData data; + int totalSamps; + + printf("PortAudio Test: output " FORMAT_NAME "\n"); + + + data.left_phase = data.right_phase = 0.0; + 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, + 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; + + printf("Waiting %d seconds for sound to finish.\n", NUM_SECONDS ); + while( Pa_StreamActive( stream ) ) Pa_Sleep(10); + + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + Pa_Terminate(); + + printf("PortAudio Test Finished: " FORMAT_NAME "\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; +} |