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authorChris Robinson <chris.kcat@gmail.com>2010-05-13 04:53:21 -0700
committerChris Robinson <chris.kcat@gmail.com>2010-05-13 04:53:21 -0700
commit7ed5d12717424352cc0d76cf6544e5f3dbbf5086 (patch)
tree827824adbb4773d8ea35b08559e8a411e4329551 /Alc
parent23b2c1f902a0af9c33e302827d1ff7725b745d60 (diff)
Pay attention to the source loop points
Diffstat (limited to 'Alc')
-rw-r--r--Alc/ALu.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/Alc/ALu.c b/Alc/ALu.c
index 8b546506..df2ec025 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -932,6 +932,7 @@ static void MixSomeSources(ALCcontext *ALContext, float (*DryBuffer)[OUTPUTCHANN
ALuint DataPosInt, DataPosFrac;
ALuint Channels, Bytes;
ALuint Frequency;
+ ALuint LoopStart, LoopEnd;
resampler_t Resampler;
ALuint BuffersPlayed;
ALboolean Looping;
@@ -992,6 +993,8 @@ next_source:
DataPosInt = ALSource->position;
DataPosFrac = ALSource->position_fraction;
Looping = ALSource->bLooping;
+ LoopStart = ALSource->LoopStart;
+ LoopEnd = ALSource->LoopEnd;
/* Compute 18.14 fixed point step */
Pitch = (ALSource->Params.Pitch*Frequency) / DeviceFreq;
@@ -1045,6 +1048,19 @@ next_source:
if(DataPosInt >= DataSize)
goto skipmix;
+ if(Looping && ALSource->lSourceType == AL_STATIC)
+ {
+ /* If current offset is beyond the loop range, do not loop */
+ if(DataPosInt >= LoopEnd)
+ Looping = AL_FALSE;
+ }
+ if(!Looping || ALSource->lSourceType != AL_STATIC)
+ {
+ /* Non-looping and non-static sources ignore loop points */
+ LoopStart = 0;
+ LoopEnd = DataSize;
+ }
+
if(BufferListItem->next)
{
ALbuffer *NextBuf = BufferListItem->next->buffer;
@@ -1077,7 +1093,7 @@ next_source:
rampLength;
/* Figure out how many samples we can mix. */
- DataSize64 = DataSize;
+ DataSize64 = LoopEnd;
DataSize64 <<= FRACTIONBITS;
DataPos64 = DataPosInt;
DataPos64 <<= FRACTIONBITS;
@@ -1353,7 +1369,7 @@ next_source:
skipmix:
/* Handle looping sources */
- if(DataPosInt >= DataSize)
+ if(DataPosInt >= LoopEnd)
{
if(BuffersPlayed < (ALSource->BuffersInQueue-1))
{
@@ -1366,7 +1382,7 @@ next_source:
BufferListItem = ALSource->queue;
BuffersPlayed = 0;
if(ALSource->lSourceType == AL_STATIC)
- DataPosInt %= DataSize;
+ DataPosInt = ((DataPosInt-LoopStart)%(LoopEnd-LoopStart)) + LoopStart;
else
DataPosInt -= DataSize;
}