diff options
| author | Ronald G. Minnich <rminnich@gmail.com> | 2009-03-31 11:57:36 +0000 |
|---|---|---|
| committer | Patrick Georgi <patrick.georgi@coresystems.de> | 2009-03-31 11:57:36 +0000 |
| commit | 5d01ec0f80cc8379df17ed9a922de37b487770b4 (patch) | |
| tree | 6994cd877e80a721cef1154239d4af6653980379 /util/romtool/tools/lzma/C/7zip/Compress/RangeCoder/RangeCoderBitTree.h | |
| parent | 0f0f9bb9a2e1c1257fdfee0b50061e82ea92161b (diff) | |
This patch adds Jordan's romtool support for v2.
There are a few changes. The 20K bootblock size restriction is gone.
ROMFS has been tested and works on v2 with qemu and kontron. Once this
patch is in, those patches will follow.
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Acked-by: Patrick Georgi <patrick.georgi@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4032 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'util/romtool/tools/lzma/C/7zip/Compress/RangeCoder/RangeCoderBitTree.h')
| -rw-r--r-- | util/romtool/tools/lzma/C/7zip/Compress/RangeCoder/RangeCoderBitTree.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/util/romtool/tools/lzma/C/7zip/Compress/RangeCoder/RangeCoderBitTree.h b/util/romtool/tools/lzma/C/7zip/Compress/RangeCoder/RangeCoderBitTree.h new file mode 100644 index 0000000000..1fa023f3b8 --- /dev/null +++ b/util/romtool/tools/lzma/C/7zip/Compress/RangeCoder/RangeCoderBitTree.h @@ -0,0 +1,161 @@ +// Compress/RangeCoder/RangeCoderBitTree.h
+
+#ifndef __COMPRESS_RANGECODER_BIT_TREE_H
+#define __COMPRESS_RANGECODER_BIT_TREE_H
+
+#include "RangeCoderBit.h"
+#include "RangeCoderOpt.h"
+
+namespace NCompress {
+namespace NRangeCoder {
+
+template <int numMoveBits, int NumBitLevels>
+class CBitTreeEncoder
+{
+ CBitEncoder<numMoveBits> Models[1 << NumBitLevels];
+public:
+ void Init()
+ {
+ for(UInt32 i = 1; i < (1 << NumBitLevels); i++)
+ Models[i].Init();
+ }
+ void Encode(CEncoder *rangeEncoder, UInt32 symbol)
+ {
+ UInt32 modelIndex = 1;
+ for (int bitIndex = NumBitLevels; bitIndex != 0 ;)
+ {
+ bitIndex--;
+ UInt32 bit = (symbol >> bitIndex) & 1;
+ Models[modelIndex].Encode(rangeEncoder, bit);
+ modelIndex = (modelIndex << 1) | bit;
+ }
+ };
+ void ReverseEncode(CEncoder *rangeEncoder, UInt32 symbol)
+ {
+ UInt32 modelIndex = 1;
+ for (int i = 0; i < NumBitLevels; i++)
+ {
+ UInt32 bit = symbol & 1;
+ Models[modelIndex].Encode(rangeEncoder, bit);
+ modelIndex = (modelIndex << 1) | bit;
+ symbol >>= 1;
+ }
+ }
+ UInt32 GetPrice(UInt32 symbol) const
+ {
+ symbol |= (1 << NumBitLevels);
+ UInt32 price = 0;
+ while (symbol != 1)
+ {
+ price += Models[symbol >> 1].GetPrice(symbol & 1);
+ symbol >>= 1;
+ }
+ return price;
+ }
+ UInt32 ReverseGetPrice(UInt32 symbol) const
+ {
+ UInt32 price = 0;
+ UInt32 modelIndex = 1;
+ for (int i = NumBitLevels; i != 0; i--)
+ {
+ UInt32 bit = symbol & 1;
+ symbol >>= 1;
+ price += Models[modelIndex].GetPrice(bit);
+ modelIndex = (modelIndex << 1) | bit;
+ }
+ return price;
+ }
+};
+
+template <int numMoveBits, int NumBitLevels>
+class CBitTreeDecoder
+{
+ CBitDecoder<numMoveBits> Models[1 << NumBitLevels];
+public:
+ void Init()
+ {
+ for(UInt32 i = 1; i < (1 << NumBitLevels); i++)
+ Models[i].Init();
+ }
+ UInt32 Decode(CDecoder *rangeDecoder)
+ {
+ UInt32 modelIndex = 1;
+ RC_INIT_VAR
+ for(int bitIndex = NumBitLevels; bitIndex != 0; bitIndex--)
+ {
+ // modelIndex = (modelIndex << 1) + Models[modelIndex].Decode(rangeDecoder);
+ RC_GETBIT(numMoveBits, Models[modelIndex].Prob, modelIndex)
+ }
+ RC_FLUSH_VAR
+ return modelIndex - (1 << NumBitLevels);
+ };
+ UInt32 ReverseDecode(CDecoder *rangeDecoder)
+ {
+ UInt32 modelIndex = 1;
+ UInt32 symbol = 0;
+ RC_INIT_VAR
+ for(int bitIndex = 0; bitIndex < NumBitLevels; bitIndex++)
+ {
+ // UInt32 bit = Models[modelIndex].Decode(rangeDecoder);
+ // modelIndex <<= 1;
+ // modelIndex += bit;
+ // symbol |= (bit << bitIndex);
+ RC_GETBIT2(numMoveBits, Models[modelIndex].Prob, modelIndex, ; , symbol |= (1 << bitIndex))
+ }
+ RC_FLUSH_VAR
+ return symbol;
+ }
+};
+
+template <int numMoveBits>
+void ReverseBitTreeEncode(CBitEncoder<numMoveBits> *Models,
+ CEncoder *rangeEncoder, int NumBitLevels, UInt32 symbol)
+{
+ UInt32 modelIndex = 1;
+ for (int i = 0; i < NumBitLevels; i++)
+ {
+ UInt32 bit = symbol & 1;
+ Models[modelIndex].Encode(rangeEncoder, bit);
+ modelIndex = (modelIndex << 1) | bit;
+ symbol >>= 1;
+ }
+}
+
+template <int numMoveBits>
+UInt32 ReverseBitTreeGetPrice(CBitEncoder<numMoveBits> *Models,
+ UInt32 NumBitLevels, UInt32 symbol)
+{
+ UInt32 price = 0;
+ UInt32 modelIndex = 1;
+ for (int i = NumBitLevels; i != 0; i--)
+ {
+ UInt32 bit = symbol & 1;
+ symbol >>= 1;
+ price += Models[modelIndex].GetPrice(bit);
+ modelIndex = (modelIndex << 1) | bit;
+ }
+ return price;
+}
+
+template <int numMoveBits>
+UInt32 ReverseBitTreeDecode(CBitDecoder<numMoveBits> *Models,
+ CDecoder *rangeDecoder, int NumBitLevels)
+{
+ UInt32 modelIndex = 1;
+ UInt32 symbol = 0;
+ RC_INIT_VAR
+ for(int bitIndex = 0; bitIndex < NumBitLevels; bitIndex++)
+ {
+ // UInt32 bit = Models[modelIndex].Decode(rangeDecoder);
+ // modelIndex <<= 1;
+ // modelIndex += bit;
+ // symbol |= (bit << bitIndex);
+ RC_GETBIT2(numMoveBits, Models[modelIndex].Prob, modelIndex, ; , symbol |= (1 << bitIndex))
+ }
+ RC_FLUSH_VAR
+ return symbol;
+}
+
+}}
+
+#endif
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