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Bug 1108917 - Part 2: Allow eviction of entire decoders that are ahead of the current play position. r=ajones

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This commit is contained in:
Matt Woodrow 2014-12-11 10:50:41 +13:00
parent d8dde6710c
commit f9fe8eb6e8
1 changed files with 24 additions and 1 deletions
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25
dom/media/mediasource/TrackBuffer.cpp
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@ -244,11 +244,15 @@ TrackBuffer::EvictData(uint32_t aThreshold)
return false;
}
// Get a list of initialized decoders, sorted by their start times.
nsTArray<SourceBufferDecoder*> decoders;
decoders.AppendElements(mInitializedDecoders);
decoders.Sort(DecoderSorter());
for (uint32_t i = 0; i < decoders.Length(); ++i) {
// First try to evict data before the current play position, starting
// with the earliest time.
uint32_t i = 0;
for (; i < decoders.Length(); ++i) {
MSE_DEBUG("TrackBuffer(%p)::EvictData decoder=%u threshold=%u toEvict=%lld",
this, i, aThreshold, toEvict);
toEvict -= decoders[i]->GetResource()->EvictData(toEvict);
@ -260,6 +264,25 @@ TrackBuffer::EvictData(uint32_t aThreshold)
break;
}
}
// If we still need to evict more, then try to evict entire decoders,
// starting from the end.
if (toEvict > 0) {
uint32_t end = i;
MOZ_ASSERT(decoders[end] == mCurrentDecoder);
for (i = decoders.Length() - 1; i > end; --i) {
MSE_DEBUG("TrackBuffer(%p)::EvictData removing entire decoder=%u from end toEvict=%lld",
this, i, toEvict);
// TODO: We could implement forward-eviction within a decoder and
// be able to evict within the current decoder.
toEvict -= decoders[i]->GetResource()->GetSize();
RemoveDecoder(decoders[i]);
if (toEvict <= 0) {
break;
}
}
}
return toEvict < (totalSize - aThreshold);
}