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VIDEO: Use new BitStreamMemory class for SmackerDecoder

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This commit is contained in:
Willem Jan Palenstijn 2017-07-24 22:54:05 +02:00
parent edfdbb9dd7
commit e72f681ceb
2 changed files with 17 additions and 18 deletions
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31
video/smk_decoder.cpp
View File

@ -29,7 +29,6 @@
#include "common/endian.h"
#include "common/util.h"
#include "common/stream.h"
#include "common/memstream.h"
#include "common/bitstream.h"
#include "common/system.h"
#include "common/textconsole.h"
@ -54,9 +53,9 @@ enum SmkBlockTypes {
class SmallHuffmanTree {
public:
SmallHuffmanTree(Common::BitStream8LSB &bs);
SmallHuffmanTree(Common::BitStreamMemory8LSB &bs);
uint16 getCode(Common::BitStream8LSB &bs);
uint16 getCode(Common::BitStreamMemory8LSB &bs);
private:
enum {
SMK_NODE = 0x8000
@ -70,10 +69,10 @@ private:
uint16 _prefixtree[256];
byte _prefixlength[256];
Common::BitStream8LSB &_bs;
Common::BitStreamMemory8LSB &_bs;
};
SmallHuffmanTree::SmallHuffmanTree(Common::BitStream8LSB &bs)
SmallHuffmanTree::SmallHuffmanTree(Common::BitStreamMemory8LSB &bs)
: _treeSize(0), _bs(bs) {
uint32 bit = _bs.getBit();
assert(bit);
@ -118,7 +117,7 @@ uint16 SmallHuffmanTree::decodeTree(uint32 prefix, int length) {
return r1+r2+1;
}
uint16 SmallHuffmanTree::getCode(Common::BitStream8LSB &bs) {
uint16 SmallHuffmanTree::getCode(Common::BitStreamMemory8LSB &bs) {
byte peek = bs.peekBits(MIN<uint32>(bs.size() - bs.pos(), 8));
uint16 *p = &_tree[_prefixtree[peek]];
bs.skip(_prefixlength[peek]);
@ -139,11 +138,11 @@ uint16 SmallHuffmanTree::getCode(Common::BitStream8LSB &bs) {
class BigHuffmanTree {
public:
BigHuffmanTree(Common::BitStream8LSB &bs, int allocSize);
BigHuffmanTree(Common::BitStreamMemory8LSB &bs, int allocSize);
~BigHuffmanTree();
void reset();
uint32 getCode(Common::BitStream8LSB &bs);
uint32 getCode(Common::BitStreamMemory8LSB &bs);
private:
enum {
SMK_NODE = 0x80000000
@ -159,13 +158,13 @@ private:
byte _prefixlength[256];
/* Used during construction */
Common::BitStream8LSB &_bs;
Common::BitStreamMemory8LSB &_bs;
uint32 _markers[3];
SmallHuffmanTree *_loBytes;
SmallHuffmanTree *_hiBytes;
};
BigHuffmanTree::BigHuffmanTree(Common::BitStream8LSB &bs, int allocSize)
BigHuffmanTree::BigHuffmanTree(Common::BitStreamMemory8LSB &bs, int allocSize)
: _bs(bs) {
uint32 bit = _bs.getBit();
if (!bit) {
@ -256,7 +255,7 @@ uint32 BigHuffmanTree::decodeTree(uint32 prefix, int length) {
return r1+r2+1;
}
uint32 BigHuffmanTree::getCode(Common::BitStream8LSB &bs) {
uint32 BigHuffmanTree::getCode(Common::BitStreamMemory8LSB &bs) {
byte peek = bs.peekBits(MIN<uint32>(bs.size() - bs.pos(), 8));
uint32 *p = &_tree[_prefixtree[peek]];
bs.skip(_prefixlength[peek]);
@ -386,7 +385,7 @@ bool SmackerDecoder::loadStream(Common::SeekableReadStream *stream) {
byte *huffmanTrees = (byte *) malloc(_header.treesSize);
_fileStream->read(huffmanTrees, _header.treesSize);
Common::BitStream8LSB bs(new Common::MemoryReadStream(huffmanTrees, _header.treesSize, DisposeAfterUse::YES), DisposeAfterUse::YES);
Common::BitStreamMemory8LSB bs(new Common::BitStreamMemoryStream(huffmanTrees, _header.treesSize, DisposeAfterUse::YES), DisposeAfterUse::YES);
videoTrack->readTrees(bs, _header.mMapSize, _header.mClrSize, _header.fullSize, _header.typeSize);
_firstFrameStart = _fileStream->pos();
@ -469,7 +468,7 @@ void SmackerDecoder::readNextPacket() {
_fileStream->read(frameData, frameDataSize);
Common::BitStream8LSB bs(new Common::MemoryReadStream(frameData, frameDataSize + 1, DisposeAfterUse::YES), DisposeAfterUse::YES);
Common::BitStreamMemory8LSB bs(new Common::BitStreamMemoryStream(frameData, frameDataSize + 1, DisposeAfterUse::YES), DisposeAfterUse::YES);
videoTrack->decodeFrame(bs);
_fileStream->seek(startPos + frameSize);
@ -553,14 +552,14 @@ Graphics::PixelFormat SmackerDecoder::SmackerVideoTrack::getPixelFormat() const
return _surface->format;
}
void SmackerDecoder::SmackerVideoTrack::readTrees(Common::BitStream8LSB &bs, uint32 mMapSize, uint32 mClrSize, uint32 fullSize, uint32 typeSize) {
void SmackerDecoder::SmackerVideoTrack::readTrees(Common::BitStreamMemory8LSB &bs, uint32 mMapSize, uint32 mClrSize, uint32 fullSize, uint32 typeSize) {
_MMapTree = new BigHuffmanTree(bs, mMapSize);
_MClrTree = new BigHuffmanTree(bs, mClrSize);
_FullTree = new BigHuffmanTree(bs, fullSize);
_TypeTree = new BigHuffmanTree(bs, typeSize);
}
void SmackerDecoder::SmackerVideoTrack::decodeFrame(Common::BitStream8LSB &bs) {
void SmackerDecoder::SmackerVideoTrack::decodeFrame(Common::BitStreamMemory8LSB &bs) {
_MMapTree->reset();
_MClrTree->reset();
_FullTree->reset();
@ -774,7 +773,7 @@ Audio::AudioStream *SmackerDecoder::SmackerAudioTrack::getAudioStream() const {
}
void SmackerDecoder::SmackerAudioTrack::queueCompressedBuffer(byte *buffer, uint32 bufferSize, uint32 unpackedSize) {
Common::BitStream8LSB audioBS(new Common::MemoryReadStream(buffer, bufferSize), DisposeAfterUse::YES);
Common::BitStreamMemory8LSB audioBS(new Common::BitStreamMemoryStream(buffer, bufferSize), DisposeAfterUse::YES);
bool dataPresent = audioBS.getBit();
if (!dataPresent)

4
video/smk_decoder.h
View File

@ -91,9 +91,9 @@ protected:
const byte *getPalette() const { _dirtyPalette = false; return _palette; }
bool hasDirtyPalette() const { return _dirtyPalette; }
void readTrees(Common::BitStream8LSB &bs, uint32 mMapSize, uint32 mClrSize, uint32 fullSize, uint32 typeSize);
void readTrees(Common::BitStreamMemory8LSB &bs, uint32 mMapSize, uint32 mClrSize, uint32 fullSize, uint32 typeSize);
void increaseCurFrame() { _curFrame++; }
void decodeFrame(Common::BitStream8LSB &bs);
void decodeFrame(Common::BitStreamMemory8LSB &bs);
void unpackPalette(Common::SeekableReadStream *stream);
protected: