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TWINE: fla disassembly findings

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looks like they are unused in the fla movies that i've tried so far...
This commit is contained in:
Martin Gerhardy 2021-02-06 14:20:26 +01:00
parent 986aa94154
commit fcbee4f724
2 changed files with 56 additions and 16 deletions
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71
engines/twine/flamovies.cpp
View File

@ -36,12 +36,16 @@ namespace TwinE {
/** FLA Frame Opcode types */
enum FlaFrameOpcode {
kLoadPalette = 0,
kFade = 1,
kPlaySample = 2,
kStopSample = 4,
kDeltaFrame = 5,
kKeyFrame = 7
kLoadPalette = 1,
kFade = 2,
kPlaySample = 3,
kFlaUnknown4 = 4,
kStopSample = 5,
kDeltaFrame = 6,
kFlaUnknown7 = 7,
kKeyFrame = 8,
kFlaUnknown9 = 9,
kFlaUnknown16SameAs9 = 16
};
/** FLA movie sample structure */
@ -172,12 +176,11 @@ void FlaMovies::processFrame() {
Common::MemoryReadStream stream(outBuf, frameData.frameVar0);
for (int32 frame = 0; frame < frameData.videoSize; ++frame) {
const uint8 opcode = stream.readByte();
stream.skip(1);
const uint32 opcodeBlockSize = stream.readUint16LE();
const uint16 opcode = stream.readUint16LE();
const uint16 opcodeBlockSize = stream.readUint16LE();
const int32 pos = stream.pos();
switch (opcode - 1) {
switch (opcode) {
case kLoadPalette: {
int16 numOfColor = stream.readSint16LE();
int16 startColor = stream.readSint16LE();
@ -186,12 +189,25 @@ void FlaMovies::processFrame() {
break;
}
case kFade: {
// FLA movies don't use cross fade
// fade out tricky
if (_fadeOut != 1) {
_engine->_screens->convertPalToRGBA(_engine->_screens->palette, _engine->_screens->paletteRGBACustom);
_engine->_screens->fadeToBlack(_engine->_screens->paletteRGBACustom);
_fadeOut = 1;
int16 innerOpcpde = stream.readSint16LE();
switch (innerOpcpde) {
case 1:
_engine->_music->playMidiMusic(26);
break;
case 2:
// FLA movies don't use cross fade
// fade out tricky
if (_fadeOut != 1) {
_engine->_screens->convertPalToRGBA(_engine->_screens->palette, _engine->_screens->paletteRGBACustom);
_engine->_screens->fadeToBlack(_engine->_screens->paletteRGBACustom);
_fadeOut = 1;
}
break;
case 3:
_flaPaletteVar = true;
break;
case 4:
_engine->_music->stopMidiMusic();
}
break;
}
@ -220,6 +236,28 @@ void FlaMovies::processFrame() {
drawKeyFrame(stream, FLASCREEN_WIDTH, FLASCREEN_HEIGHT);
break;
}
case kFlaUnknown7: {
byte *ptr = (byte *)_engine->frontVideoBuffer.getPixels();
for (int y = 0; y < 200; ++y) {
for (int x = 0; x < 80; ++x) {
*ptr++ = 0;
}
ptr = ptr + 80;
}
break;
}
case kFlaUnknown9:
case kFlaUnknown16SameAs9: {
byte *ptr = (byte *)_engine->frontVideoBuffer.getPixels();
for (int y = 0; y < 200; ++y) {
for (int x = 0; x < 80; ++x) {
*ptr++ = stream.readByte();
}
ptr = ptr + 80;
}
break;
}
case kFlaUnknown4:
default: {
break;
}
@ -348,6 +386,7 @@ void FlaMovies::playFlaMovie(const char *flaName) {
ScopedKeyMap scopedKeyMap(_engine, cutsceneKeyMapId);
_flaPaletteVar = true;
do {
FrameMarker frame;
ScopedFPS scopedFps(flaHeaderData.speed);

1
engines/twine/flamovies.h
View File

@ -72,6 +72,7 @@ private:
int32 _fadeOut = 0;
/** Auxiliar FLA fade out variable to count frames between the fade */
int32 fadeOutFrames = 0;
bool _flaPaletteVar = false;
/** FLA movie file buffer */
uint8 flaBuffer[FLASCREEN_WIDTH * FLASCREEN_HEIGHT] {0};