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/RangeCoder.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/RangeCoder.h')
| -rw-r--r-- | util/romtool/tools/lzma/C/7zip/Compress/RangeCoder/RangeCoder.h | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/util/romtool/tools/lzma/C/7zip/Compress/RangeCoder/RangeCoder.h b/util/romtool/tools/lzma/C/7zip/Compress/RangeCoder/RangeCoder.h new file mode 100644 index 0000000000..9828bc4b94 --- /dev/null +++ b/util/romtool/tools/lzma/C/7zip/Compress/RangeCoder/RangeCoder.h @@ -0,0 +1,205 @@ +// Compress/RangeCoder/RangeCoder.h
+
+#ifndef __COMPRESS_RANGECODER_H
+#define __COMPRESS_RANGECODER_H
+
+#include "../../Common/InBuffer.h"
+#include "../../Common/OutBuffer.h"
+
+namespace NCompress {
+namespace NRangeCoder {
+
+const int kNumTopBits = 24;
+const UInt32 kTopValue = (1 << kNumTopBits);
+
+class CEncoder
+{
+ UInt32 _cacheSize;
+ Byte _cache;
+public:
+ UInt64 Low;
+ UInt32 Range;
+ COutBuffer Stream;
+ bool Create(UInt32 bufferSize) { return Stream.Create(bufferSize); }
+
+ void SetStream(ISequentialOutStream *stream) { Stream.SetStream(stream); }
+ void Init()
+ {
+ Stream.Init();
+ Low = 0;
+ Range = 0xFFFFFFFF;
+ _cacheSize = 1;
+ _cache = 0;
+ }
+
+ void FlushData()
+ {
+ // Low += 1;
+ for(int i = 0; i < 5; i++)
+ ShiftLow();
+ }
+
+ HRESULT FlushStream() { return Stream.Flush(); }
+
+ void ReleaseStream() { Stream.ReleaseStream(); }
+
+ void Encode(UInt32 start, UInt32 size, UInt32 total)
+ {
+ Low += start * (Range /= total);
+ Range *= size;
+ while (Range < kTopValue)
+ {
+ Range <<= 8;
+ ShiftLow();
+ }
+ }
+
+ void ShiftLow()
+ {
+ if ((UInt32)Low < (UInt32)0xFF000000 || (int)(Low >> 32) != 0)
+ {
+ Byte temp = _cache;
+ do
+ {
+ Stream.WriteByte((Byte)(temp + (Byte)(Low >> 32)));
+ temp = 0xFF;
+ }
+ while(--_cacheSize != 0);
+ _cache = (Byte)((UInt32)Low >> 24);
+ }
+ _cacheSize++;
+ Low = (UInt32)Low << 8;
+ }
+
+ void EncodeDirectBits(UInt32 value, int numTotalBits)
+ {
+ for (int i = numTotalBits - 1; i >= 0; i--)
+ {
+ Range >>= 1;
+ if (((value >> i) & 1) == 1)
+ Low += Range;
+ if (Range < kTopValue)
+ {
+ Range <<= 8;
+ ShiftLow();
+ }
+ }
+ }
+
+ void EncodeBit(UInt32 size0, UInt32 numTotalBits, UInt32 symbol)
+ {
+ UInt32 newBound = (Range >> numTotalBits) * size0;
+ if (symbol == 0)
+ Range = newBound;
+ else
+ {
+ Low += newBound;
+ Range -= newBound;
+ }
+ while (Range < kTopValue)
+ {
+ Range <<= 8;
+ ShiftLow();
+ }
+ }
+
+ UInt64 GetProcessedSize() { return Stream.GetProcessedSize() + _cacheSize + 4; }
+};
+
+class CDecoder
+{
+public:
+ CInBuffer Stream;
+ UInt32 Range;
+ UInt32 Code;
+ bool Create(UInt32 bufferSize) { return Stream.Create(bufferSize); }
+
+ void Normalize()
+ {
+ while (Range < kTopValue)
+ {
+ Code = (Code << 8) | Stream.ReadByte();
+ Range <<= 8;
+ }
+ }
+
+ void SetStream(ISequentialInStream *stream) { Stream.SetStream(stream); }
+ void Init()
+ {
+ Stream.Init();
+ Code = 0;
+ Range = 0xFFFFFFFF;
+ for(int i = 0; i < 5; i++)
+ Code = (Code << 8) | Stream.ReadByte();
+ }
+
+ void ReleaseStream() { Stream.ReleaseStream(); }
+
+ UInt32 GetThreshold(UInt32 total)
+ {
+ return (Code) / ( Range /= total);
+ }
+
+ void Decode(UInt32 start, UInt32 size)
+ {
+ Code -= start * Range;
+ Range *= size;
+ Normalize();
+ }
+
+ UInt32 DecodeDirectBits(int numTotalBits)
+ {
+ UInt32 range = Range;
+ UInt32 code = Code;
+ UInt32 result = 0;
+ for (int i = numTotalBits; i != 0; i--)
+ {
+ range >>= 1;
+ /*
+ result <<= 1;
+ if (code >= range)
+ {
+ code -= range;
+ result |= 1;
+ }
+ */
+ UInt32 t = (code - range) >> 31;
+ code -= range & (t - 1);
+ result = (result << 1) | (1 - t);
+
+ if (range < kTopValue)
+ {
+ code = (code << 8) | Stream.ReadByte();
+ range <<= 8;
+ }
+ }
+ Range = range;
+ Code = code;
+ return result;
+ }
+
+ UInt32 DecodeBit(UInt32 size0, UInt32 numTotalBits)
+ {
+ UInt32 newBound = (Range >> numTotalBits) * size0;
+ UInt32 symbol;
+ if (Code < newBound)
+ {
+ symbol = 0;
+ Range = newBound;
+ }
+ else
+ {
+ symbol = 1;
+ Code -= newBound;
+ Range -= newBound;
+ }
+ Normalize();
+ return symbol;
+ }
+
+ UInt64 GetProcessedSize() {return Stream.GetProcessedSize(); }
+};
+
+}}
+
+#endif
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