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Also use the slow path for the last packet in each frame because it may be padded

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This commit is contained in:
Cameron Gutman 2014-11-10 23:59:23 -08:00
parent 7bc325fa08
commit 1531629fcd
1 changed files with 30 additions and 6 deletions
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36
moonlight-common/src/com/limelight/nvstream/av/video/VideoDepacketizer.java
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@ -129,9 +129,11 @@ public class VideoDepacketizer {
}
}
private void addInputDataSlow(VideoPacket packet, ByteBufferDescriptor location)
private void addInputDataSlow(VideoPacket packet, ByteBufferDescriptor location,
boolean atFrameStart, boolean hasIntraNalPadding)
{
boolean isDecodingH264 = false;
// If we're at frame start, we aren't yet decoding.
boolean isDecodingH264 = !atFrameStart;
while (location.length != 0)
{
@ -156,6 +158,7 @@ public class VideoDepacketizer {
reassembleAvcFrame(packet.getFrameIndex());
// Setup state for the new NAL
frameStartTime = System.currentTimeMillis();
avcFrameDataChain = new LinkedList<ByteBufferDescriptor>();
avcFrameDataLength = 0;
packetSet = new HashSet<VideoPacket>();
@ -198,10 +201,17 @@ public class VideoDepacketizer {
{
// Only stop if we're decoding something or this
// isn't padding
if (isDecodingH264 || !NAL.isPadding(cachedSpecialDesc))
boolean isPadding = NAL.isPadding(cachedSpecialDesc);
if (isDecodingH264 || !isPadding)
{
break;
}
else if (!hasIntraNalPadding && isPadding)
{
// There's nothing more after this
location.length = 0;
break;
}
}
}
@ -212,6 +222,15 @@ public class VideoDepacketizer {
if (isDecodingH264 && avcFrameDataChain != null)
{
// HACK: It's possible that the last location in the packet could be zero-padded
// but not with enough zeros to be an invalid AVC sequence. In this case, we're going to
// just guess that 2 zeros in a row at the end are probably padding.
if (!hasIntraNalPadding && location.length == 0 &&
location.data[location.offset-2] == 0 &&
location.data[location.offset-1] == 0) {
location.offset -= 2;
}
ByteBufferDescriptor data = new ByteBufferDescriptor(location.data, start, location.offset-start);
if (packetSet.add(packet)) {
@ -355,13 +374,18 @@ public class VideoDepacketizer {
}
lastPacketInStream = streamPacketIndex;
if (firstPacket
if ((flags & VideoPacket.FLAG_EOF) != 0)
{
// The last video packet can also have zero padding which we must strip using the slow path.
addInputDataSlow(packet, cachedReassemblyDesc, (flags & VideoPacket.FLAG_SOF) != 0, false);
}
else if (firstPacket
&& NAL.getSpecialSequenceDescriptor(cachedReassemblyDesc, cachedSpecialDesc)
&& NAL.isAvcFrameStart(cachedSpecialDesc)
&& cachedSpecialDesc.data[cachedSpecialDesc.offset+cachedSpecialDesc.length] == 0x67)
{
// SPS and PPS prefix is padded between NALs, so we must decode it with the slow path
addInputDataSlow(packet, cachedReassemblyDesc);
// SPS and PPS prefix is padded between NALs, so we must decode it with the slow path.
addInputDataSlow(packet, cachedReassemblyDesc, true, true);
}
else
{