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Diffstat (limited to 'portaudio/test/patest_sine_formats.c')
| -rw-r--r-- | portaudio/test/patest_sine_formats.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/portaudio/test/patest_sine_formats.c b/portaudio/test/patest_sine_formats.c new file mode 100644 index 0000000..3224d6e --- /dev/null +++ b/portaudio/test/patest_sine_formats.c @@ -0,0 +1,203 @@ +/** @file patest_sine_formats.c + @ingroup test_src + @brief Play a sine wave for several seconds. Test various data formats. + @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 (10) +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (512) +#define LEFT_FREQ (SAMPLE_RATE/256.0) /* So we hit 1.0 */ +#define RIGHT_FREQ (500.0) +#define AMPLITUDE (1.0) + +/* Select ONE format for testing. */ +#define TEST_UINT8 (0) +#define TEST_INT8 (0) +#define TEST_INT16 (1) +#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( 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++ ) + { + data->left_phase += (LEFT_FREQ / SAMPLE_RATE); + if( data->left_phase > 1.0) data->left_phase -= 1.0; + *out++ = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->left_phase * M_PI * 2. ))); + + 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. ))); + } + /* 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) +{ + PaStream *stream; + PaStreamParameters outputParameters; + 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; + + + outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device. */ + outputParameters.channelCount = 2; /* Stereo output */ + outputParameters.sampleFormat = TEST_FORMAT; /* Selected above. */ + outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device)->defaultLowOutputLatency; + outputParameters.hostApiSpecificStreamInfo = NULL; + err = Pa_OpenStream( &stream, + NULL, /* No input. */ + &outputParameters, /* As above. */ + 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; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + printf("Waiting %d seconds for sound to finish.\n", NUM_SECONDS ); + + 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("PortAudio Test Finished: " FORMAT_NAME "\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; +} |