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BAdapterIO: Implement SeekModes

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This commit is contained in:
Dario Casalinuovo
2016-10-20 02:26:25 +02:00
parent 87534026de
commit 1c5cb31fef
1 changed files with 15 additions and 4 deletions
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src/kits/media/AdapterIO.cpp
+15 -4
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@@ -270,21 +270,32 @@ BAdapterIO::Seek(off_t position, uint32 seekMode)
{
CALLED();
// TODO: Support seekModes
status_t ret = _EvaluateWait(position, 0);
off_t absolutePosition = 0;
off_t size = 0;
if (seekMode == SEEK_CUR)
absolutePosition = Position()+position;
else if (seekMode == SEEK_END) {
if (GetSize(&size) != B_OK)
return B_NOT_SUPPORTED;
absolutePosition = size-position;
}
status_t ret = _EvaluateWait(absolutePosition, 0);
if (ret == B_RESOURCE_UNAVAILABLE && fBuffer->IsStreaming()
&& fBuffer->IsSeekable()) {
fSeekSem = create_sem(0, "BAdapterIO seek sem");
if (SeekRequested(position) != B_OK)
if (SeekRequested(absolutePosition) != B_OK)
return B_NOT_SUPPORTED;
TRACE("BAdapterIO::Seek: Locking on backend seek\n");
acquire_sem(fSeekSem);
TRACE("BAdapterIO::Seek: Seek completed!\n");
fBuffer->ResetStartOffset(position);
fBuffer->ResetStartOffset(absolutePosition);
} else if (ret != B_OK)
return B_NOT_SUPPORTED;