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Don't create new byte array when replacing bits if possible

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Iwan Timmer
2014-03-11 17:53:57 +01:00
parent 8adf71d62a
commit 6362b566bc
1 changed files with 21 additions and 11 deletions
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32
src/com/limelight/binding/video/OmxDecoderRenderer.java
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@@ -75,13 +75,21 @@ public class OmxDecoderRenderer implements VideoDecoderRenderer {
public void replace(ByteBufferDescriptor source, int srcOffset, int srcLength, byte[] data, int dataLength) {
//Add 7 to always round up
int length = (source.length*8-srcLength+dataLength+7)/8;
byte dest[] = new byte[length];
int bitOffset = srcOffset%8;
int byteOffset = srcOffset/8;
//Copy the first bytes
System.arraycopy(source.data, source.offset, dest, 0, byteOffset);
byte dest[] = null;
int offset = 0;
if (length>source.length) {
dest = new byte[length];
//Copy the first bytes
System.arraycopy(source.data, source.offset, dest, offset, byteOffset);
} else {
dest = source.data;
offset = source.offset;
}
int byteLength = (bitOffset+dataLength+7)/8;
int bitTrailing = 8 - (srcOffset+dataLength) % 8;
@@ -109,7 +117,7 @@ public class OmxDecoderRenderer implements VideoDecoderRenderer {
}
}
dest[i+byteOffset] = result;
dest[i+byteOffset+offset] = result;
}
//Source offset
@@ -120,16 +128,18 @@ public class OmxDecoderRenderer implements VideoDecoderRenderer {
int destOffset = (srcOffset+dataLength)/8;
for (int i=1;i<source.length-byteOffset;i++) {
byte result = 0;
result = (byte) (source.data[byteOffset+i-1+source.offset] << 8-bitOffset);
byte moved = (byte) ((source.data[byteOffset+i+source.offset]&0xFF) >>> bitOffset);
result ^= moved;
int diff = destOffset >= byteOffset-1?i:source.length-byteOffset-i;
dest[i+destOffset] = result;
byte result = 0;
result = (byte) (source.data[byteOffset+diff-1+source.offset] << 8-bitOffset);
byte moved = (byte) ((source.data[byteOffset+diff+source.offset]&0xFF) >>> bitOffset);
result ^= moved;
dest[diff+destOffset+offset] = result;
}
source.data = dest;
source.offset = 0;
source.offset = offset;
source.length = length;
}