Chris@39: /** @file patest_sine_formats.c Chris@39: @ingroup test_src Chris@39: @brief Play a sine wave for several seconds. Test various data formats. Chris@39: @author Phil Burk Chris@39: */ Chris@39: /* Chris@39: * $Id: patest_sine_formats.c 1097 2006-08-26 08:27:53Z rossb $ Chris@39: * Chris@39: * This program uses the PortAudio Portable Audio Library. Chris@39: * For more information see: http://www.portaudio.com Chris@39: * Copyright (c) 1999-2000 Ross Bencina and Phil Burk Chris@39: * Chris@39: * Permission is hereby granted, free of charge, to any person obtaining Chris@39: * a copy of this software and associated documentation files Chris@39: * (the "Software"), to deal in the Software without restriction, Chris@39: * including without limitation the rights to use, copy, modify, merge, Chris@39: * publish, distribute, sublicense, and/or sell copies of the Software, Chris@39: * and to permit persons to whom the Software is furnished to do so, Chris@39: * subject to the following conditions: Chris@39: * Chris@39: * The above copyright notice and this permission notice shall be Chris@39: * included in all copies or substantial portions of the Software. Chris@39: * Chris@39: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, Chris@39: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF Chris@39: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. Chris@39: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR Chris@39: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF Chris@39: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION Chris@39: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Chris@39: */ Chris@39: Chris@39: /* Chris@39: * The text above constitutes the entire PortAudio license; however, Chris@39: * the PortAudio community also makes the following non-binding requests: Chris@39: * Chris@39: * Any person wishing to distribute modifications to the Software is Chris@39: * requested to send the modifications to the original developer so that Chris@39: * they can be incorporated into the canonical version. It is also Chris@39: * requested that these non-binding requests be included along with the Chris@39: * license above. Chris@39: */ Chris@39: #include Chris@39: #include Chris@39: #include "portaudio.h" Chris@39: Chris@39: #define NUM_SECONDS (10) Chris@39: #define SAMPLE_RATE (44100) Chris@39: #define FRAMES_PER_BUFFER (512) Chris@39: #define LEFT_FREQ (SAMPLE_RATE/256.0) /* So we hit 1.0 */ Chris@39: #define RIGHT_FREQ (500.0) Chris@39: #define AMPLITUDE (1.0) Chris@39: Chris@39: /* Select ONE format for testing. */ Chris@39: #define TEST_UINT8 (0) Chris@39: #define TEST_INT8 (0) Chris@39: #define TEST_INT16 (1) Chris@39: #define TEST_FLOAT32 (0) Chris@39: Chris@39: #if TEST_UINT8 Chris@39: #define TEST_FORMAT paUInt8 Chris@39: typedef unsigned char SAMPLE_t; Chris@39: #define SAMPLE_ZERO (0x80) Chris@39: #define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(127.0 * (x))) Chris@39: #define FORMAT_NAME "Unsigned 8 Bit" Chris@39: Chris@39: #elif TEST_INT8 Chris@39: #define TEST_FORMAT paInt8 Chris@39: typedef char SAMPLE_t; Chris@39: #define SAMPLE_ZERO (0) Chris@39: #define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(127.0 * (x))) Chris@39: #define FORMAT_NAME "Signed 8 Bit" Chris@39: Chris@39: #elif TEST_INT16 Chris@39: #define TEST_FORMAT paInt16 Chris@39: typedef short SAMPLE_t; Chris@39: #define SAMPLE_ZERO (0) Chris@39: #define DOUBLE_TO_SAMPLE(x) (SAMPLE_ZERO + (SAMPLE_t)(32767 * (x))) Chris@39: #define FORMAT_NAME "Signed 16 Bit" Chris@39: Chris@39: #elif TEST_FLOAT32 Chris@39: #define TEST_FORMAT paFloat32 Chris@39: typedef float SAMPLE_t; Chris@39: #define SAMPLE_ZERO (0.0) Chris@39: #define DOUBLE_TO_SAMPLE(x) ((SAMPLE_t)(x)) Chris@39: #define FORMAT_NAME "Float 32 Bit" Chris@39: #endif Chris@39: Chris@39: #ifndef M_PI Chris@39: #define M_PI (3.14159265) Chris@39: #endif Chris@39: Chris@39: Chris@39: typedef struct Chris@39: { Chris@39: double left_phase; Chris@39: double right_phase; Chris@39: unsigned int framesToGo; Chris@39: } Chris@39: paTestData; Chris@39: /* This routine will be called by the PortAudio engine when audio is needed. Chris@39: ** It may called at interrupt level on some machines so don't do anything Chris@39: ** that could mess up the system like calling malloc() or free(). Chris@39: */ Chris@39: static int patestCallback( const void *inputBuffer, Chris@39: void *outputBuffer, Chris@39: unsigned long framesPerBuffer, Chris@39: const PaStreamCallbackTimeInfo* timeInfo, Chris@39: PaStreamCallbackFlags statusFlags, Chris@39: void *userData ) Chris@39: { Chris@39: paTestData *data = (paTestData*)userData; Chris@39: SAMPLE_t *out = (SAMPLE_t *)outputBuffer; Chris@39: int i; Chris@39: int framesToCalc; Chris@39: int finished = 0; Chris@39: (void) inputBuffer; /* Prevent unused variable warnings. */ Chris@39: Chris@39: if( data->framesToGo < framesPerBuffer ) Chris@39: { Chris@39: framesToCalc = data->framesToGo; Chris@39: data->framesToGo = 0; Chris@39: finished = 1; Chris@39: } Chris@39: else Chris@39: { Chris@39: framesToCalc = framesPerBuffer; Chris@39: data->framesToGo -= framesPerBuffer; Chris@39: } Chris@39: Chris@39: for( i=0; ileft_phase += (LEFT_FREQ / SAMPLE_RATE); Chris@39: if( data->left_phase > 1.0) data->left_phase -= 1.0; Chris@39: *out++ = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->left_phase * M_PI * 2. ))); Chris@39: Chris@39: data->right_phase += (RIGHT_FREQ / SAMPLE_RATE); Chris@39: if( data->right_phase > 1.0) data->right_phase -= 1.0; Chris@39: *out++ = DOUBLE_TO_SAMPLE( AMPLITUDE * sin( (data->right_phase * M_PI * 2. ))); Chris@39: } Chris@39: /* zero remainder of final buffer */ Chris@39: for( ; i<(int)framesPerBuffer; i++ ) Chris@39: { Chris@39: *out++ = SAMPLE_ZERO; /* left */ Chris@39: *out++ = SAMPLE_ZERO; /* right */ Chris@39: } Chris@39: return finished; Chris@39: } Chris@39: /*******************************************************************/ Chris@39: int main(void); Chris@39: int main(void) Chris@39: { Chris@39: PaStream *stream; Chris@39: PaStreamParameters outputParameters; Chris@39: PaError err; Chris@39: paTestData data; Chris@39: int totalSamps; Chris@39: Chris@39: printf("PortAudio Test: output " FORMAT_NAME "\n"); Chris@39: Chris@39: data.left_phase = data.right_phase = 0.0; Chris@39: data.framesToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */ Chris@39: err = Pa_Initialize(); Chris@39: if( err != paNoError ) goto error; Chris@39: Chris@39: Chris@39: outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device. */ Chris@39: outputParameters.channelCount = 2; /* Stereo output */ Chris@39: outputParameters.sampleFormat = TEST_FORMAT; /* Selected above. */ Chris@39: outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device)->defaultLowOutputLatency; Chris@39: outputParameters.hostApiSpecificStreamInfo = NULL; Chris@39: err = Pa_OpenStream( &stream, Chris@39: NULL, /* No input. */ Chris@39: &outputParameters, /* As above. */ Chris@39: SAMPLE_RATE, Chris@39: FRAMES_PER_BUFFER, Chris@39: paClipOff, /* we won't output out of range samples so don't bother clipping them */ Chris@39: patestCallback, Chris@39: &data ); Chris@39: if( err != paNoError ) goto error; Chris@39: Chris@39: err = Pa_StartStream( stream ); Chris@39: if( err != paNoError ) goto error; Chris@39: Chris@39: printf("Waiting %d seconds for sound to finish.\n", NUM_SECONDS ); Chris@39: Chris@39: while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(100); Chris@39: if( err < 0 ) goto error; Chris@39: Chris@39: err = Pa_CloseStream( stream ); Chris@39: if( err != paNoError ) goto error; Chris@39: Pa_Terminate(); Chris@39: Chris@39: printf("PortAudio Test Finished: " FORMAT_NAME "\n"); Chris@39: Chris@39: return err; Chris@39: error: Chris@39: Pa_Terminate(); Chris@39: fprintf( stderr, "An error occured while using the portaudio stream\n" ); Chris@39: fprintf( stderr, "Error number: %d\n", err ); Chris@39: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); Chris@39: return err; Chris@39: }