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Fixed screen twitches with "shakes" sound shader

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Caused by inaccuracies in the precached amplitude data in the OpenAL
backend, see https://github.com/dhewm/dhewm3/pull/71 for more details.

Video sample (not mine):
http://www.youtube.com/watch?v=ZUohifAbPW0
The "twitches" can also be observed right at the beginning of the
mars_city2 map.
This commit is contained in:
bibendovsky 2013-05-17 08:34:19 +03:00 committed by Daniel Gibson
parent 6407881cff
commit 351f5dc94f
1 changed files with 0 additions and 50 deletions
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50
neo/sound/snd_cache.cpp
View file

@ -496,28 +496,6 @@ void idSoundSample::Load( void ) {
if ( alGetError() != AL_NO_ERROR ) {
common->Error( "idSoundCache: error loading data into OpenAL hardware buffer" );
} else {
// Compute amplitude block size
int blockSize = 512 * objectInfo.nSamplesPerSec / 44100 ;
// Allocate amplitude data array
amplitudeData = (byte *)soundCacheAllocator.Alloc( ( objectSize / blockSize + 1 ) * 2 * sizeof( short) );
// Creating array of min/max amplitude pairs per blockSize samples
int i;
for ( i = 0; i < objectSize; i+=blockSize ) {
short min = 32767;
short max = -32768;
int j;
for ( j = 0; j < Min( objectSize - i, blockSize ); j++ ) {
min = ((short *)nonCacheData)[ i + j ] < min ? ((short *)nonCacheData)[ i + j ] : min;
max = ((short *)nonCacheData)[ i + j ] > max ? ((short *)nonCacheData)[ i + j ] : max;
}
((short *)amplitudeData)[ ( i / blockSize ) * 2 ] = min;
((short *)amplitudeData)[ ( i / blockSize ) * 2 + 1 ] = max;
}
hardwareBuffer = true;
}
}
@ -571,28 +549,6 @@ void idSoundSample::Load( void ) {
if ( alGetError() != AL_NO_ERROR )
common->Error( "idSoundCache: error loading data into OpenAL hardware buffer" );
else {
// Compute amplitude block size
int blockSize = 512 * objectInfo.nSamplesPerSec / 44100 ;
// Allocate amplitude data array
amplitudeData = (byte *)soundCacheAllocator.Alloc( ( objectSize / blockSize + 1 ) * 2 * sizeof( short ) );
// Creating array of min/max amplitude pairs per blockSize samples
int i;
for ( i = 0; i < objectSize; i+=blockSize ) {
short min = 32767;
short max = -32768;
int j;
for ( j = 0; j < Min( objectSize - i, blockSize ); j++ ) {
min = ((short *)destData)[ i + j ] < min ? ((short *)destData)[ i + j ] : min;
max = ((short *)destData)[ i + j ] > max ? ((short *)destData)[ i + j ] : max;
}
((short *)amplitudeData)[ ( i / blockSize ) * 2 ] = min;
((short *)amplitudeData)[ ( i / blockSize ) * 2 + 1 ] = max;
}
hardwareBuffer = true;
}
@ -601,12 +557,6 @@ void idSoundSample::Load( void ) {
}
}
}
// Free memory if sample was loaded into hardware
if ( hardwareBuffer ) {
soundCacheAllocator.Free( nonCacheData );
nonCacheData = NULL;
}
}
fh.Close();