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Properly limit the calculated source offset components

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This commit is contained in:
Chris Robinson 2015-10-14 03:23:19 -07:00
parent d386675efe
commit 98eda6b35b
1 changed files with 8 additions and 4 deletions
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12
OpenAL32/alSource.c
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@ -21,6 +21,7 @@
#include "config.h"
#include <stdlib.h>
#include <limits.h>
#include <math.h>
#include <float.h>
@ -2949,6 +2950,7 @@ static ALboolean GetSampleOffset(ALsource *Source, ALuint *offset, ALuint *frac)
{
const ALbuffer *Buffer = NULL;
const ALbufferlistitem *BufferList;
ALdouble dbloff, dblfrac;
/* Find the first valid Buffer in the Queue */
BufferList = ATOMIC_LOAD(&Source->queue);
@ -2990,13 +2992,15 @@ static ALboolean GetSampleOffset(ALsource *Source, ALuint *offset, ALuint *frac)
break;
case AL_SAMPLE_OFFSET:
*offset = (ALuint)Source->Offset;
*frac = (ALuint)((Source->Offset - *offset) * FRACTIONONE);
dbloff = modf(Source->Offset, &dblfrac);
*offset = (ALuint)mind(dbloff, UINT_MAX);
*frac = (ALuint)mind(dblfrac*FRACTIONONE, FRACTIONONE-1.0);
break;
case AL_SEC_OFFSET:
*offset = (ALuint)(Source->Offset*Buffer->Frequency);
*frac = (ALuint)(((Source->Offset*Buffer->Frequency) - *offset) * FRACTIONONE);
dbloff = modf(Source->Offset*Buffer->Frequency, &dblfrac);
*offset = (ALuint)mind(dbloff, UINT_MAX);
*frac = (ALuint)mind(dblfrac*FRACTIONONE, FRACTIONONE-1.0);
break;
}
Source->Offset = -1.0;