uint32_t ResourceQueue::EvictBefore(uint64_t aOffset, ErrorResult& aRv)
{
SBR_DEBUG("EvictBefore(%llu)", aOffset);
uint32_t evicted = 0;
while (ResourceItem* item = ResourceAt(0)) {
SBR_DEBUG("item=%p length=%d offset=%llu",
item, item->mData->Length(), mOffset);
if (item->mData->Length() + mOffset >= aOffset) {
if (aOffset <= mOffset) {
break;
}
uint32_t offset = aOffset - mOffset;
mOffset += offset;
evicted += offset;
RefPtr<MediaByteBuffer> data = new MediaByteBuffer;
if (!data->AppendElements(item->mData->Elements() + offset,
item->mData->Length() - offset,
fallible)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return 0;
}
item->mData = data;
break;
}
mOffset += item->mData->Length();
evicted += item->mData->Length();
delete PopFront();
}
return evicted;
}
uint32_t
ResourceQueue::EvictAll()
{
SBR_DEBUG("EvictAll()");
uint32_t evicted = 0;
while (ResourceItem* item = ResourceAt(0)) {
SBR_DEBUG("item=%p length=%d offset=%llu",
item, item->mData->Length(), mOffset);
mOffset += item->mData->Length();
evicted += item->mData->Length();
delete PopFront();
}
return evicted;
}
uint32_t
SourceBufferResource::EvictAll()
{
SBR_DEBUG("EvictAll()");
ReentrantMonitorAutoEnter mon(mMonitor);
return mInputBuffer.EvictAll();
}
nsresult
SourceBufferResource::Seek(int32_t aWhence, int64_t aOffset)
{
SBR_DEBUG("Seek(aWhence=%d, aOffset=%lld)",
aWhence, aOffset);
ReentrantMonitorAutoEnter mon(mMonitor);
int64_t newOffset = mOffset;
switch (aWhence) {
case nsISeekableStream::NS_SEEK_END:
newOffset = GetLength() - aOffset;
break;
case nsISeekableStream::NS_SEEK_CUR:
newOffset += aOffset;
break;
case nsISeekableStream::NS_SEEK_SET:
newOffset = aOffset;
break;
}
SBR_DEBUGV("newOffset=%lld GetOffset()=%llu GetLength()=%llu)",
newOffset, mInputBuffer.GetOffset(), GetLength());
nsresult rv = SeekInternal(newOffset);
mon.NotifyAll();
return rv;
}
nsresult
SourceBufferResource::ReadAt(int64_t aOffset, char* aBuffer, uint32_t aCount, uint32_t* aBytes)
{
SBR_DEBUG("ReadAt(aOffset=%lld, aBuffer=%p, aCount=%u, aBytes=%p)",
aOffset, aBytes, aCount, aBytes);
ReentrantMonitorAutoEnter mon(mMonitor);
return ReadAtInternal(aOffset, aBuffer, aCount, aBytes, /* aMayBlock = */ true);
}
void
SourceBufferResource::Ended()
{
SBR_DEBUG("");
ReentrantMonitorAutoEnter mon(mMonitor);
mEnded = true;
mon.NotifyAll();
}
uint32_t
ResourceQueue::Evict(uint64_t aOffset, uint32_t aSizeToEvict,
ErrorResult& aRv)
{
SBR_DEBUG("Evict(aOffset=%llu, aSizeToEvict=%u)",
aOffset, aSizeToEvict);
return EvictBefore(std::min(aOffset, mOffset + (uint64_t)aSizeToEvict), aRv);
}
nsresult
SourceBufferResource::Close()
{
ReentrantMonitorAutoEnter mon(mMonitor);
SBR_DEBUG("Close");
//MOZ_ASSERT(!mClosed);
mClosed = true;
mon.NotifyAll();
return NS_OK;
}
SourceBufferResource::SourceBufferResource(const nsACString& aType)
: mType(aType)
, mMonitor("mozilla::SourceBufferResource::mMonitor")
, mOffset(0)
, mClosed(false)
, mEnded(false)
{
SBR_DEBUG("");
MOZ_COUNT_CTOR(SourceBufferResource);
}
void
SourceBufferResource::AppendData(MediaByteBuffer* aData)
{
SBR_DEBUG("AppendData(aData=%p, aLength=%u)",
aData->Elements(), aData->Length());
ReentrantMonitorAutoEnter mon(mMonitor);
mInputBuffer.AppendItem(aData);
mEnded = false;
mon.NotifyAll();
}
void
SourceBufferResource::EvictBefore(uint64_t aOffset, ErrorResult& aRv)
{
SBR_DEBUG("EvictBefore(aOffset=%llu)", aOffset);
ReentrantMonitorAutoEnter mon(mMonitor);
// If aOffset is past the current playback offset we don't evict.
if (aOffset < mOffset) {
mInputBuffer.EvictBefore(aOffset, aRv);
}
// Wake up any waiting threads in case a ReadInternal call
// is now invalid.
mon.NotifyAll();
}
uint32_t
SourceBufferResource::EvictData(uint64_t aPlaybackOffset, uint32_t aThreshold)
{
SBR_DEBUG("EvictData(aPlaybackOffset=%llu,"
"aThreshold=%u)", aPlaybackOffset, aThreshold);
ReentrantMonitorAutoEnter mon(mMonitor);
uint32_t result = mInputBuffer.Evict(aPlaybackOffset, aThreshold);
if (result > 0) {
// Wake up any waiting threads in case a ReadInternal call
// is now invalid.
mon.NotifyAll();
}
return result;
}
nsresult
SourceBufferResource::ReadFromCache(char* aBuffer, int64_t aOffset, uint32_t aCount)
{
SBR_DEBUG("ReadFromCache(aBuffer=%p, aOffset=%lld, aCount=%u)",
aBuffer, aOffset, aCount);
ReentrantMonitorAutoEnter mon(mMonitor);
uint32_t bytesRead;
int64_t oldOffset = mOffset;
nsresult rv = ReadAtInternal(aOffset, aBuffer, aCount, &bytesRead, /* aMayBlock = */ false);
mOffset = oldOffset; // ReadFromCache isn't supposed to affect the seek position.
NS_ENSURE_SUCCESS(rv, rv);
// ReadFromCache return failure if not all the data is cached.
return bytesRead == aCount ? NS_OK : NS_ERROR_FAILURE;
}
SourceBufferResource::~SourceBufferResource()
{
SBR_DEBUG("");
MOZ_COUNT_DTOR(SourceBufferResource);
}