virtual int64_t GetNextCachedData(int64_t aOffset)
{
MutexAutoLock lock(mLock);
EnsureSizeInitialized();
return (aOffset < mSize) ? aOffset : -1;
}
nsresult
FileMediaResource::UnsafeSeek(int32_t aWhence, int64_t aOffset)
{
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
if (!mSeekable)
return NS_ERROR_FAILURE;
EnsureSizeInitialized();
return mSeekable->Seek(aWhence, aOffset);
}
nsresult
FileMediaResource::GetCachedRanges(MediaByteRangeSet& aRanges)
{
MutexAutoLock lock(mLock);
EnsureSizeInitialized();
if (mSize == -1) {
return NS_ERROR_FAILURE;
}
aRanges += MediaByteRange(0, mSize);
return NS_OK;
}
nsresult
FileMediaResource::ReadFromCache(char* aBuffer, int64_t aOffset,
uint32_t aCount)
{
MutexAutoLock lock(mLock);
EnsureSizeInitialized();
if (!aCount) {
return NS_OK;
}
int64_t offset = 0;
nsresult res = mSeekable->Tell(&offset);
NS_ENSURE_SUCCESS(res,res);
res = mSeekable->Seek(nsISeekableStream::NS_SEEK_SET, aOffset);
NS_ENSURE_SUCCESS(res,res);
uint32_t bytesRead = 0;
do {
uint32_t x = 0;
uint32_t bytesToRead = aCount - bytesRead;
res = mInput->Read(aBuffer, bytesToRead, &x);
bytesRead += x;
if (!x) {
res = NS_ERROR_FAILURE;
}
} while (bytesRead != aCount && res == NS_OK);
// Reset read head to original position so we don't disturb any other
// reading thread.
nsresult seekres = mSeekable->Seek(nsISeekableStream::NS_SEEK_SET, offset);
// If a read failed in the loop above, we want to return its failure code.
NS_ENSURE_SUCCESS(res,res);
// Else we succeed if the reset-seek succeeds.
return seekres;
}
virtual int64_t GetCachedDataEnd(int64_t aOffset) {
MutexAutoLock lock(mLock);
EnsureSizeInitialized();
return std::max(aOffset, mSize);
}
virtual int64_t GetLength() {
MutexAutoLock lock(mLock);
EnsureSizeInitialized();
return mSizeInitialized ? mSize : 0;
}
nsresult
FileMediaResource::UnsafeRead(char* aBuffer, uint32_t aCount, uint32_t* aBytes)
{
EnsureSizeInitialized();
return mInput->Read(aBuffer, aCount, aBytes);
}
