void
EbmlComposer::ExtractBuffer(nsTArray<nsTArray<uint8_t> >* aDestBufs,
uint32_t aFlag)
{
if ((aFlag & ContainerWriter::FLUSH_NEEDED) && mClusterHeaderIndex > 0) {
FinishCluster();
}
// aDestBufs may have some element
for (uint32_t i = 0; i < mClusterCanFlushBuffs.Length(); i ++ ) {
aDestBufs->AppendElement()->SwapElements(mClusterCanFlushBuffs[i]);
}
mClusterCanFlushBuffs.Clear();
}
void
EbmlComposer::WriteSimpleBlock(EncodedFrame* aFrame)
{
EbmlGlobal ebml;
ebml.offset = 0;
if (aFrame->GetFrameType() == EncodedFrame::FrameType::VP8_I_FRAME) {
FinishCluster();
}
auto block = mClusterBuffs.AppendElement();
block->SetLength(aFrame->GetFrameData().Length() + DEFAULT_HEADER_SIZE);
ebml.buf = block->Elements();
if (aFrame->GetFrameType() == EncodedFrame::FrameType::VP8_I_FRAME) {
EbmlLoc ebmlLoc;
Ebml_StartSubElement(&ebml, &ebmlLoc, Cluster);
MOZ_ASSERT(mClusterBuffs.Length() > 0);
// current cluster header array index
mClusterHeaderIndex = mClusterBuffs.Length() - 1;
mClusterLengthLoc = ebmlLoc.offset;
mClusterTimecode = aFrame->GetTimeStamp() / PR_USEC_PER_MSEC;
Ebml_SerializeUnsigned(&ebml, Timecode, mClusterTimecode);
mFlushState |= FLUSH_CLUSTER;
}
if (aFrame->GetFrameType() != EncodedFrame::FrameType::VORBIS_AUDIO_FRAME) {
short timeCode = aFrame->GetTimeStamp() / PR_USEC_PER_MSEC
- mClusterTimecode;
writeSimpleBlock(&ebml, 0x1, timeCode, aFrame->GetFrameType() ==
EncodedFrame::FrameType::VP8_I_FRAME,
0, 0, (unsigned char*)aFrame->GetFrameData().Elements(),
aFrame->GetFrameData().Length());
} else {
writeSimpleBlock(&ebml, 0x2, 0, false,
0, 0, (unsigned char*)aFrame->GetFrameData().Elements(),
aFrame->GetFrameData().Length());
}
MOZ_ASSERT(ebml.offset <= DEFAULT_HEADER_SIZE +
aFrame->GetFrameData().Length(),
"write more data > EBML_BUFFER_SIZE");
block->SetLength(ebml.offset);
}
