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Diffstat (limited to 'portaudio/examples/paex_sine_c++.cpp')
| -rw-r--r-- | portaudio/examples/paex_sine_c++.cpp | 275 |
1 files changed, 0 insertions, 275 deletions
diff --git a/portaudio/examples/paex_sine_c++.cpp b/portaudio/examples/paex_sine_c++.cpp deleted file mode 100644 index 5d96522..0000000 --- a/portaudio/examples/paex_sine_c++.cpp +++ /dev/null @@ -1,275 +0,0 @@ -/** @file paex_sine.c - @ingroup examples_src - @brief Play a sine wave for several seconds. - @author Ross Bencina <rossb@audiomulch.com> - @author Phil Burk <philburk@softsynth.com> -*/ -/* - * $Id: paex_sine.c 1752 2011-09-08 03:21:55Z philburk $ - * - * 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 (5) -#define SAMPLE_RATE (44100) -#define FRAMES_PER_BUFFER (64) - -#ifndef M_PI -#define M_PI (3.14159265) -#endif - -#define TABLE_SIZE (200) - -class Sine -{ -public: - Sine() : stream(0), left_phase(0), right_phase(0) - { - /* initialise sinusoidal wavetable */ - for( int i=0; i<TABLE_SIZE; i++ ) - { - sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); - } - - sprintf( message, "No Message" ); - } - - bool open(PaDeviceIndex index) - { - PaStreamParameters outputParameters; - - outputParameters.device = index; - if (outputParameters.device == paNoDevice) { - return false; - } - - const PaDeviceInfo* pInfo = Pa_GetDeviceInfo(index); - if (pInfo != 0) - { - printf("Output device name: '%s'\r", pInfo->name); - } - - outputParameters.channelCount = 2; /* stereo output */ - outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ - outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; - outputParameters.hostApiSpecificStreamInfo = NULL; - - PaError err = Pa_OpenStream( - &stream, - NULL, /* no input */ - &outputParameters, - SAMPLE_RATE, - paFramesPerBufferUnspecified, - paClipOff, /* we won't output out of range samples so don't bother clipping them */ - &Sine::paCallback, - this /* Using 'this' for userData so we can cast to Sine* in paCallback method */ - ); - - if (err != paNoError) - { - /* Failed to open stream to device !!! */ - return false; - } - - err = Pa_SetStreamFinishedCallback( stream, &Sine::paStreamFinished ); - - if (err != paNoError) - { - Pa_CloseStream( stream ); - stream = 0; - - return false; - } - - return true; - } - - bool close() - { - if (stream == 0) - return false; - - PaError err = Pa_CloseStream( stream ); - stream = 0; - - return (err == paNoError); - } - - - bool start() - { - if (stream == 0) - return false; - - PaError err = Pa_StartStream( stream ); - - return (err == paNoError); - } - - bool stop() - { - if (stream == 0) - return false; - - PaError err = Pa_StopStream( stream ); - - return (err == paNoError); - } - -private: - /* The instance callback, where we have access to every method/variable in object of class Sine */ - int paCallbackMethod(const void *inputBuffer, void *outputBuffer, - unsigned long framesPerBuffer, - const PaStreamCallbackTimeInfo* timeInfo, - PaStreamCallbackFlags statusFlags) - { - float *out = (float*)outputBuffer; - unsigned long i; - - (void) timeInfo; /* Prevent unused variable warnings. */ - (void) statusFlags; - (void) inputBuffer; - - for( i=0; i<framesPerBuffer; i++ ) - { - *out++ = sine[left_phase]; /* left */ - *out++ = sine[right_phase]; /* right */ - left_phase += 1; - if( left_phase >= TABLE_SIZE ) left_phase -= TABLE_SIZE; - right_phase += 3; /* higher pitch so we can distinguish left and right. */ - if( right_phase >= TABLE_SIZE ) right_phase -= TABLE_SIZE; - } - - return paContinue; - - } - - /* 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 paCallback( const void *inputBuffer, void *outputBuffer, - unsigned long framesPerBuffer, - const PaStreamCallbackTimeInfo* timeInfo, - PaStreamCallbackFlags statusFlags, - void *userData ) - { - /* Here we cast userData to Sine* type so we can call the instance method paCallbackMethod, we can do that since - we called Pa_OpenStream with 'this' for userData */ - return ((Sine*)userData)->paCallbackMethod(inputBuffer, outputBuffer, - framesPerBuffer, - timeInfo, - statusFlags); - } - - - void paStreamFinishedMethod() - { - printf( "Stream Completed: %s\n", message ); - } - - /* - * This routine is called by portaudio when playback is done. - */ - static void paStreamFinished(void* userData) - { - return ((Sine*)userData)->paStreamFinishedMethod(); - } - - PaStream *stream; - float sine[TABLE_SIZE]; - int left_phase; - int right_phase; - char message[20]; -}; - -class ScopedPaHandler -{ -public: - ScopedPaHandler() - : _result(Pa_Initialize()) - { - } - ~ScopedPaHandler() - { - if (_result == paNoError) - { - Pa_Terminate(); - } - } - - PaError result() const { return _result; } - -private: - PaError _result; -}; - - -/*******************************************************************/ -int main(void); -int main(void) -{ - Sine sine; - - printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER); - - ScopedPaHandler paInit; - if( paInit.result() != paNoError ) goto error; - - if (sine.open(Pa_GetDefaultOutputDevice())) - { - if (sine.start()) - { - printf("Play for %d seconds.\n", NUM_SECONDS ); - Pa_Sleep( NUM_SECONDS * 1000 ); - - sine.stop(); - } - - sine.close(); - } - - printf("Test finished.\n"); - return paNoError; - -error: - fprintf( stderr, "An error occurred while using the portaudio stream\n" ); - fprintf( stderr, "Error number: %d\n", paInit.result() ); - fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( paInit.result() ) ); - return 1; -} |