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-rw-r--r--engines/kyra/screen.cpp3
-rw-r--r--engines/kyra/screen.h2
-rw-r--r--engines/kyra/vqa.cpp104
-rw-r--r--engines/kyra/vqa.h2
4 files changed, 21 insertions, 90 deletions
diff --git a/engines/kyra/screen.cpp b/engines/kyra/screen.cpp
index 4d8b3182b7..617e52b88e 100644
--- a/engines/kyra/screen.cpp
+++ b/engines/kyra/screen.cpp
@@ -1547,7 +1547,7 @@ void Screen::decodeFrame3(const uint8 *src, uint8 *dst, uint32 size) {
}
}
-void Screen::decodeFrame4(const uint8 *src, uint8 *dst, uint32 dstSize) {
+uint Screen::decodeFrame4(const uint8 *src, uint8 *dst, uint32 dstSize) {
debugC(9, kDebugLevelScreen, "Screen::decodeFrame4(%p, %p, %d)", (const void *)src, (const void *)dst, dstSize);
uint8 *dstOrig = dst;
uint8 *dstEnd = dst + dstSize;
@@ -1595,6 +1595,7 @@ void Screen::decodeFrame4(const uint8 *src, uint8 *dst, uint32 dstSize) {
break;
}
}
+ return dst - dstOrig;
}
void Screen::decodeFrameDelta(uint8 *dst, const uint8 *src) {
diff --git a/engines/kyra/screen.h b/engines/kyra/screen.h
index e8823bb8f2..1f11dfcd46 100644
--- a/engines/kyra/screen.h
+++ b/engines/kyra/screen.h
@@ -225,7 +225,7 @@ public:
// decoding functions
static void decodeFrame3(const uint8 *src, uint8 *dst, uint32 size);
- static void decodeFrame4(const uint8 *src, uint8 *dst, uint32 dstSize);
+ static uint decodeFrame4(const uint8 *src, uint8 *dst, uint32 dstSize);
static void decodeFrameDelta(uint8 *dst, const uint8 *src);
static void decodeFrameDeltaPage(uint8 *dst, const uint8 *src, const int pitch, bool noXor);
diff --git a/engines/kyra/vqa.cpp b/engines/kyra/vqa.cpp
index 233ae07776..3660bcf217 100644
--- a/engines/kyra/vqa.cpp
+++ b/engines/kyra/vqa.cpp
@@ -96,77 +96,6 @@ uint32 VQAMovie::readTag() {
return tag;
}
-// Chunk types ending in a 'Z' are decoded using this function.
-
-int VQAMovie::decodeFormat80(byte *inbuf, byte *outbuf) {
- byte *src = inbuf;
- byte *dst = outbuf;
-
- while (1) {
- int relPos, pos;
- int count;
- byte color;
- int i;
-
- byte command = *src++;
-
- switch (command) {
- case 0x80:
- return dst - outbuf;
-
- case 0xFF:
- /* 11111111 <count> <pos> */
- count = src[0] | (src[1] << 8);
- pos = src[2] | (src[3] << 8);
- src += 4;
- for (i = 0; i < count; i++)
- dst[i] = outbuf[i + pos];
- break;
-
- case 0xFE:
- /* 11111110 <count> <color> */
- count = src[0] | (src[1] << 8);
- color = src[2];
- src += 3;
- memset(dst, color, count);
- break;
-
- default:
- if (command >= 0xC0) {
- /* 11 <count - 3> <pos> */
- count = (command & 0x3F) + 3;
- pos = src[0] | (src[1] << 8);
- src += 2;
- for (i = 0; i < count; i++)
- dst[i] = outbuf[pos + i];
- } else if (command >= 0x80) {
- /* 10 <count> */
- count = command & 0x3F;
- memcpy(dst, src, count);
- src += count;
- } else {
- /* 0 <count - 3> <relative pos> */
- count = ((command & 0x70) >> 4) + 3;
- relPos = ((command & 0x0F) << 8) | src[0];
- src++;
- for (i = 0; i < count; i++)
- dst[i] = dst[i - relPos];
- }
- break;
- }
-
- dst += count;
- }
-}
-
-inline int16 clip8BitSample(int16 sample) {
- if (sample > 255)
- return 255;
- if (sample < 0)
- return 0;
- return sample;
-}
-
void VQAMovie::decodeSND1(byte *inbuf, uint32 insize, byte *outbuf, uint32 outsize) {
const int8 WSTable2Bit[] = { -2, -1, 0, 1 };
const int8 WSTable4Bit[] = {
@@ -206,11 +135,11 @@ void VQAMovie::decodeSND1(byte *inbuf, uint32 insize, byte *outbuf, uint32 outsi
code = *inbuf++;
curSample += WSTable4Bit[code & 0x0f];
- curSample = clip8BitSample(curSample);
+ curSample = CLIP<int16>(curSample, 0, 255);
*outbuf++ = curSample;
curSample += WSTable4Bit[code >> 4];
- curSample = clip8BitSample(curSample);
+ curSample = CLIP<int16>(curSample, 0, 255);
*outbuf++ = curSample;
outsize -= 2;
@@ -221,19 +150,19 @@ void VQAMovie::decodeSND1(byte *inbuf, uint32 insize, byte *outbuf, uint32 outsi
code = *inbuf++;
curSample += WSTable2Bit[code & 0x03];
- curSample = clip8BitSample(curSample);
+ curSample = CLIP<int16>(curSample, 0, 255);
*outbuf++ = curSample;
curSample += WSTable2Bit[(code >> 2) & 0x03];
- curSample = clip8BitSample(curSample);
+ curSample = CLIP<int16>(curSample, 0, 255);
*outbuf++ = curSample;
curSample += WSTable2Bit[(code >> 4) & 0x03];
- curSample = clip8BitSample(curSample);
+ curSample = CLIP<int16>(curSample, 0, 255);
*outbuf++ = curSample;
curSample += WSTable2Bit[(code >> 6) & 0x03];
- curSample = clip8BitSample(curSample);
+ curSample = CLIP<int16>(curSample, 0, 255);
*outbuf++ = curSample;
outsize -= 4;
@@ -325,11 +254,11 @@ bool VQAMovie::open(const char *filename) {
_frameInfo = new uint32[_header.numFrames];
_frame = new byte[_header.width * _header.height];
- size = 0xf00 * _header.blockW * _header.blockH;
- _codeBook = new byte[size];
- _partialCodeBook = new byte[size];
- memset(_codeBook, 0, size);
- memset(_partialCodeBook, 0, size);
+ _codeBookSize = 0xf00 * _header.blockW * _header.blockH;
+ _codeBook = new byte[_codeBookSize];
+ _partialCodeBook = new byte[_codeBookSize];
+ memset(_codeBook, 0, _codeBookSize);
+ memset(_partialCodeBook, 0, _codeBookSize);
_numVectorPointers = (_header.width / _header.blockW) * (_header.height * _header.blockH);
_vectorPointers = new uint16[_numVectorPointers];
@@ -427,6 +356,7 @@ void VQAMovie::close() {
_frameInfo = NULL;
_frame = NULL;
+ _codeBookSize = 0;
_codeBook = NULL;
_partialCodeBook = NULL;
_vectorPointers = NULL;
@@ -513,7 +443,7 @@ void VQAMovie::displayFrame(uint frameNum) {
case MKID_BE('CBFZ'): // Full codebook
inbuf = (byte *)allocBuffer(0, size);
_file.read(inbuf, size);
- decodeFormat80(inbuf, _codeBook);
+ Screen::decodeFrame4(inbuf, _codeBook, _codeBookSize);
break;
case MKID_BE('CBP0'): // Partial codebook
@@ -538,7 +468,7 @@ void VQAMovie::displayFrame(uint frameNum) {
case MKID_BE('CPLZ'): // Palette
inbuf = (byte *)allocBuffer(0, size);
_file.read(inbuf, size);
- size = decodeFormat80(inbuf, _vm->screen()->_currentPalette);
+ Screen::decodeFrame4(inbuf, _vm->screen()->_currentPalette, 768);
break;
case MKID_BE('VPT0'): // Frame data
@@ -553,7 +483,7 @@ void VQAMovie::displayFrame(uint frameNum) {
outbuf = (byte *)allocBuffer(1, 2 * _numVectorPointers);
_file.read(inbuf, size);
- size = decodeFormat80(inbuf, outbuf);
+ size = Screen::decodeFrame4(inbuf, outbuf, 2 * _numVectorPointers);
assert(size / 2 <= _numVectorPointers);
@@ -614,7 +544,7 @@ void VQAMovie::displayFrame(uint frameNum) {
if (_numPartialCodeBooks == _header.cbParts) {
if (_compressedCodeBook) {
- decodeFormat80(_partialCodeBook, _codeBook);
+ Screen::decodeFrame4(_partialCodeBook, _codeBook, _codeBookSize);
} else {
memcpy(_codeBook, _partialCodeBook, _partialCodeBookSize);
}
@@ -633,7 +563,7 @@ void VQAMovie::play() {
startTick = _system->getMillis();
- // First, handle any sound chunk that apears before the first frame.
+ // First, handle any sound chunk that appears before the first frame.
// At least in some versions, it will contain half a second of audio,
// presumably to lessen the risk of audio underflow.
//
diff --git a/engines/kyra/vqa.h b/engines/kyra/vqa.h
index ff4864c318..98328de0cb 100644
--- a/engines/kyra/vqa.h
+++ b/engines/kyra/vqa.h
@@ -91,7 +91,6 @@ protected:
void *allocBuffer(int num, uint32 size);
void freeBuffers();
- int decodeFormat80(byte *inbuf, byte *outbuf);
void decodeSND1(byte *inbuf, uint32 insize, byte *outbuf, uint32 outsize);
void displayFrame(uint frameNum);
@@ -100,6 +99,7 @@ protected:
VQAHeader _header;
uint32 *_frameInfo;
+ uint32 _codeBookSize;
byte *_codeBook;
byte *_partialCodeBook;
bool _compressedCodeBook;
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 00:42:46 +0000