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); }