mirror of
https://github.com/cookiengineer/audacity
synced 2025-10-25 15:53:52 +02:00
Converted CRLF to LF.
This commit is contained in:
lllucius
@@ -1,252 +1,252 @@
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/** @file paex_sine.c
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@ingroup examples_src
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@brief Play a sine wave for several seconds.
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@author Ross Bencina <rossb@audiomulch.com>
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@author Phil Burk <philburk@softsynth.com>
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*/
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/*
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* $Id: paex_sine.c 1752 2011-09-08 03:21:55Z philburk $
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*
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* This program uses the PortAudio Portable Audio Library.
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* For more information see: http://www.portaudio.com/
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* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The text above constitutes the entire PortAudio license; however,
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* the PortAudio community also makes the following non-binding requests:
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version. It is also
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* requested that these non-binding requests be included along with the
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* license above.
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*/
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#include <stdio.h>
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#include <math.h>
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#include "portaudio.h"
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#define NUM_SECONDS (5)
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#define SAMPLE_RATE (44100)
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#define FRAMES_PER_BUFFER (64)
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#ifndef M_PI
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#define M_PI (3.14159265)
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#endif
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#define TABLE_SIZE (200)
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class Sine
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{
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public:
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Sine() : stream(0), left_phase(0), right_phase(0)
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{
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/* initialise sinusoidal wavetable */
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for( int i=0; i<TABLE_SIZE; i++ )
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{
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sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
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}
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sprintf( message, "No Message" );
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}
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bool open(PaDeviceIndex index)
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{
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PaStreamParameters outputParameters;
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outputParameters.device = index;
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if (outputParameters.device == paNoDevice) {
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return false;
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}
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outputParameters.channelCount = 2; /* stereo output */
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outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
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outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
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outputParameters.hostApiSpecificStreamInfo = NULL;
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PaError err = Pa_OpenStream(
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&stream,
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NULL, /* no input */
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&outputParameters,
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SAMPLE_RATE,
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FRAMES_PER_BUFFER,
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paClipOff, /* we won't output out of range samples so don't bother clipping them */
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&Sine::paCallback,
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this /* Using 'this' for userData so we can cast to Sine* in paCallback method */
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);
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if (err != paNoError)
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{
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/* Failed to open stream to device !!! */
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return false;
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}
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err = Pa_SetStreamFinishedCallback( stream, &Sine::paStreamFinished );
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if (err != paNoError)
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{
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Pa_CloseStream( stream );
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stream = 0;
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return false;
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}
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return true;
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}
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bool close()
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{
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if (stream == 0)
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return false;
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PaError err = Pa_CloseStream( stream );
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stream = 0;
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return (err == paNoError);
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}
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bool start()
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{
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if (stream == 0)
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return false;
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PaError err = Pa_StartStream( stream );
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return (err == paNoError);
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}
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bool stop()
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{
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if (stream == 0)
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return false;
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PaError err = Pa_StopStream( stream );
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return (err == paNoError);
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}
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private:
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/* The instance callback, where we have access to every method/variable in object of class Sine */
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int paCallbackMethod(const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags)
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{
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float *out = (float*)outputBuffer;
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unsigned long i;
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(void) timeInfo; /* Prevent unused variable warnings. */
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(void) statusFlags;
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(void) inputBuffer;
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for( i=0; i<framesPerBuffer; i++ )
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{
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*out++ = sine[left_phase]; /* left */
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*out++ = sine[right_phase]; /* right */
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left_phase += 1;
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if( left_phase >= TABLE_SIZE ) left_phase -= TABLE_SIZE;
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right_phase += 3; /* higher pitch so we can distinguish left and right. */
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if( right_phase >= TABLE_SIZE ) right_phase -= TABLE_SIZE;
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}
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return paContinue;
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}
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/* This routine will be called by the PortAudio engine when audio is needed.
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** It may called at interrupt level on some machines so don't do anything
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** that could mess up the system like calling malloc() or free().
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*/
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static int paCallback( const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData )
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{
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/* Here we cast userData to Sine* type so we can call the instance method paCallbackMethod, we can do that since
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we called Pa_OpenStream with 'this' for userData */
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return ((Sine*)userData)->paCallbackMethod(inputBuffer, outputBuffer,
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framesPerBuffer,
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timeInfo,
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statusFlags);
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}
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void paStreamFinishedMethod()
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{
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printf( "Stream Completed: %s\n", message );
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}
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/*
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* This routine is called by portaudio when playback is done.
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*/
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static void paStreamFinished(void* userData)
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{
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return ((Sine*)userData)->paStreamFinishedMethod();
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}
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PaStream *stream;
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float sine[TABLE_SIZE];
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int left_phase;
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int right_phase;
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char message[20];
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};
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/*******************************************************************/
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int main(void);
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int main(void)
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{
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PaError err;
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Sine sine;
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printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER);
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err = Pa_Initialize();
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if( err != paNoError ) goto error;
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if (sine.open(Pa_GetDefaultOutputDevice()))
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{
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if (sine.start())
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{
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printf("Play for %d seconds.\n", NUM_SECONDS );
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Pa_Sleep( NUM_SECONDS * 1000 );
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sine.stop();
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}
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sine.close();
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}
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Pa_Terminate();
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printf("Test finished.\n");
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return err;
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error:
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Pa_Terminate();
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fprintf( stderr, "An error occured while using the portaudio stream\n" );
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fprintf( stderr, "Error number: %d\n", err );
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fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
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return err;
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}
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/** @file paex_sine.c
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@ingroup examples_src
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@brief Play a sine wave for several seconds.
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@author Ross Bencina <rossb@audiomulch.com>
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@author Phil Burk <philburk@softsynth.com>
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*/
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/*
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* $Id: paex_sine.c 1752 2011-09-08 03:21:55Z philburk $
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*
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* This program uses the PortAudio Portable Audio Library.
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* For more information see: http://www.portaudio.com/
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* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
|
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
|
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* publish, distribute, sublicense, and/or sell copies of the Software,
|
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
|
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The text above constitutes the entire PortAudio license; however,
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* the PortAudio community also makes the following non-binding requests:
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version. It is also
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* requested that these non-binding requests be included along with the
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* license above.
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*/
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#include <stdio.h>
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#include <math.h>
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#include "portaudio.h"
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#define NUM_SECONDS (5)
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#define SAMPLE_RATE (44100)
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#define FRAMES_PER_BUFFER (64)
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#ifndef M_PI
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#define M_PI (3.14159265)
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#endif
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#define TABLE_SIZE (200)
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class Sine
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{
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public:
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Sine() : stream(0), left_phase(0), right_phase(0)
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{
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/* initialise sinusoidal wavetable */
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for( int i=0; i<TABLE_SIZE; i++ )
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{
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sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );
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}
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sprintf( message, "No Message" );
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}
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bool open(PaDeviceIndex index)
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{
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PaStreamParameters outputParameters;
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outputParameters.device = index;
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if (outputParameters.device == paNoDevice) {
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return false;
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}
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outputParameters.channelCount = 2; /* stereo output */
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outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */
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outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
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outputParameters.hostApiSpecificStreamInfo = NULL;
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PaError err = Pa_OpenStream(
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&stream,
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NULL, /* no input */
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&outputParameters,
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SAMPLE_RATE,
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FRAMES_PER_BUFFER,
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paClipOff, /* we won't output out of range samples so don't bother clipping them */
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&Sine::paCallback,
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this /* Using 'this' for userData so we can cast to Sine* in paCallback method */
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);
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if (err != paNoError)
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{
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/* Failed to open stream to device !!! */
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return false;
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}
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err = Pa_SetStreamFinishedCallback( stream, &Sine::paStreamFinished );
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if (err != paNoError)
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{
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Pa_CloseStream( stream );
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stream = 0;
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return false;
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}
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return true;
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}
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bool close()
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{
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if (stream == 0)
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return false;
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PaError err = Pa_CloseStream( stream );
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stream = 0;
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return (err == paNoError);
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}
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bool start()
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{
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if (stream == 0)
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return false;
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PaError err = Pa_StartStream( stream );
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return (err == paNoError);
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}
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bool stop()
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{
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if (stream == 0)
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return false;
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PaError err = Pa_StopStream( stream );
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return (err == paNoError);
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}
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private:
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/* The instance callback, where we have access to every method/variable in object of class Sine */
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int paCallbackMethod(const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags)
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{
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float *out = (float*)outputBuffer;
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unsigned long i;
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(void) timeInfo; /* Prevent unused variable warnings. */
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(void) statusFlags;
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(void) inputBuffer;
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for( i=0; i<framesPerBuffer; i++ )
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{
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*out++ = sine[left_phase]; /* left */
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*out++ = sine[right_phase]; /* right */
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left_phase += 1;
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if( left_phase >= TABLE_SIZE ) left_phase -= TABLE_SIZE;
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right_phase += 3; /* higher pitch so we can distinguish left and right. */
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if( right_phase >= TABLE_SIZE ) right_phase -= TABLE_SIZE;
|
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}
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return paContinue;
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}
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/* This routine will be called by the PortAudio engine when audio is needed.
|
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** It may called at interrupt level on some machines so don't do anything
|
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** that could mess up the system like calling malloc() or free().
|
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*/
|
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static int paCallback( const void *inputBuffer, void *outputBuffer,
|
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
|
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PaStreamCallbackFlags statusFlags,
|
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void *userData )
|
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{
|
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/* Here we cast userData to Sine* type so we can call the instance method paCallbackMethod, we can do that since
|
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we called Pa_OpenStream with 'this' for userData */
|
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return ((Sine*)userData)->paCallbackMethod(inputBuffer, outputBuffer,
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framesPerBuffer,
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timeInfo,
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statusFlags);
|
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}
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|
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|
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void paStreamFinishedMethod()
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{
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printf( "Stream Completed: %s\n", message );
|
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}
|
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|
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/*
|
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* This routine is called by portaudio when playback is done.
|
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*/
|
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static void paStreamFinished(void* userData)
|
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{
|
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return ((Sine*)userData)->paStreamFinishedMethod();
|
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}
|
||||
|
||||
PaStream *stream;
|
||||
float sine[TABLE_SIZE];
|
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int left_phase;
|
||||
int right_phase;
|
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char message[20];
|
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};
|
||||
|
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|
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/*******************************************************************/
|
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int main(void);
|
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int main(void)
|
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{
|
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PaError err;
|
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Sine sine;
|
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|
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printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER);
|
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|
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err = Pa_Initialize();
|
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if( err != paNoError ) goto error;
|
||||
|
||||
if (sine.open(Pa_GetDefaultOutputDevice()))
|
||||
{
|
||||
if (sine.start())
|
||||
{
|
||||
printf("Play for %d seconds.\n", NUM_SECONDS );
|
||||
Pa_Sleep( NUM_SECONDS * 1000 );
|
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|
||||
sine.stop();
|
||||
}
|
||||
|
||||
sine.close();
|
||||
}
|
||||
|
||||
Pa_Terminate();
|
||||
printf("Test finished.\n");
|
||||
|
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return err;
|
||||
|
||||
error:
|
||||
Pa_Terminate();
|
||||
fprintf( stderr, "An error occured while using the portaudio stream\n" );
|
||||
fprintf( stderr, "Error number: %d\n", err );
|
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fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
|
||||
return err;
|
||||
}
|
||||
|
||||
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