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/*
* Modification History
*
* 2004-July-17 Jason Rohrer
* Created.
*
* 2004-July-21 Jason Rohrer
* Switched to a passive (callback-based) player. Old player saved here.
*/
#include "SoundPlayerActive.h"
#include <stdio.h>
SoundPlayer::SoundPlayer()
: mRealtimeSounds( new SimpleVector<SoundSamples *>() ) {
PaError error = OpenAudioStream( &mAudioStream, 44100, paFloat32,
( PABLIO_WRITE | PABLIO_MONO ) );
if( error == paNoError ) {
mAudioInitialized = true;
}
else {
mAudioInitialized = false;
fprintf( stderr,
"An error occured while setting up the sound stream\n" );
fprintf( stderr, "Error number: %d\n", error );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( error ) );
}
}
SoundPlayer::~SoundPlayer() {
if( mAudioInitialized ) {
PaError error = CloseAudioStream( mAudioStream );
if( error != paNoError ) {
fprintf(
stderr,
"An error occured while shutting down the sound stream\n" );
fprintf( stderr, "Error number: %d\n", error);
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( error) );
}
}
int numSounds = mRealtimeSounds->size();
for( int i=0; i<numSounds; i++ ) {
delete [] *( mRealtimeSounds->getElement( i ) );
}
delete mRealtimeSounds;
}
void SoundPlayer::playSoundNow( SoundSamples *inSamples ) {
mRealtimeSounds->push_back( new SoundSamples( inSamples ) );
}
unsigned long SoundPlayer::getNumMusicSamplesNeeded() {
return GetAudioStreamWriteable( mAudioStream );
}
void SoundPlayer::addMoreMusic( SoundSamples *inSamples ) {
SoundSamples *mixingBuffer = new SoundSamples( inSamples );
unsigned long bufferLength = mixingBuffer->mSampleCount;
// add each pending realtime sound to the buffer
int i = 0;
// we may be removing sounds from the buffer as we use them up
// i is adjusted inside the while loop
while( i<mRealtimeSounds->size() ) {
SoundSamples *realtimeSound = *( mRealtimeSounds->getElement( i ) );
unsigned long soundLength = realtimeSound->mSampleCount;
// limit length of this mix based on whichever is shorter, the sound
// or the mixing buffer
unsigned long mixLength = bufferLength;
if( mixLength > soundLength ) {
mixLength = soundLength;
}
for( unsigned long j=0; j<mixLength; j++ ) {
mixingBuffer->mLeftChannel[j] += realtimeSound->mLeftChannel[j];
mixingBuffer->mRightChannel[j] += realtimeSound->mRightChannel[j];
}
if( mixLength == soundLength ) {
// we have used up all samples of this sound
delete realtimeSound;
mRealtimeSounds->deleteElement( i );
// don't increment i, since the next element drops into the current
// index
}
else {
// trim off the samples that we have used
realtimeSound->trim( mixLength );
// increment i to move on to the next sound
i++;
}
}
/*
float **samples = new float*[ bufferLength ];
unsigned long j;
for( j=0; j<bufferLength; j++ ) {
samples[j] = new float[2];
samples[j][0] = mixingBuffer->mLeftChannel[j];
samples[j][1] = mixingBuffer->mRightChannel[j];
}
WriteAudioStream( mAudioStream, samples, bufferLength );
for( j=0; j<bufferLength; j++ ) {
delete [] samples[j];
}
delete [] samples;
*/
float *samples = new float[ bufferLength ];
unsigned long j;
for( j=0; j<bufferLength; j++ ) {
samples[j] = mixingBuffer->mLeftChannel[j];
}
WriteAudioStream( mAudioStream, samples, bufferLength );
delete [] samples;
delete mixingBuffer;
}
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