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COMMON: FORMATS: Implement gmin atom parsing for QuickTime movies

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This commit implements gmin (Base Media Info Atom) parsing for QuickTime movies.
It defines control information for the media, including graphics mode and balance.
This commit is contained in:
Krish 2024-06-19 14:24:11 +05:30 committed by Eugene Sandulenko
parent d704b8e959
commit 5e6b127a8c
2 changed files with 17 additions and 1 deletions
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15
common/formats/quicktime.cpp
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@ -170,7 +170,7 @@ void QuickTimeParser::initParseTable() {
{ &QuickTimeParser::readESDS, MKTAG('e', 's', 'd', 's') },
{ &QuickTimeParser::readSMI, MKTAG('S', 'M', 'I', ' ') },
{ &QuickTimeParser::readDefault, MKTAG('g', 'm', 'h', 'd') },
{ &QuickTimeParser::readLeaf, MKTAG('g', 'm', 'i', 'n') },
{ &QuickTimeParser::readGMIN, MKTAG('g', 'm', 'i', 'n') },
{ &QuickTimeParser::readDefault, MKTAG('S', 'T', 'p', 'n') },
{ &QuickTimeParser::readPINF, MKTAG('p', 'I', 'n', 'f') },
{ nullptr, 0 }
@ -865,6 +865,18 @@ int QuickTimeParser::readNAVG(Atom atom) {
return 0;
}
int QuickTimeParser::readGMIN(Atom atom) {
Track *track = _tracks.back();
_fd->readUint32BE(); // version + flags
track->graphicsMode = (GraphicsMode)_fd->readUint16BE();
_fd->readMultipleBE(track->opcolor);
track->soundBalance = _fd->readUint16BE();
_fd->readUint16BE(); // reserved
return 0;
}
int QuickTimeParser::readPINF(Atom atom) {
Track *track = _tracks.back();
@ -1049,6 +1061,7 @@ QuickTimeParser::Track::Track() {
nlvlTo = -1;
graphicsMode = GraphicsMode::COPY;
opcolor[0] = opcolor[1] = opcolor[2] = 0;
soundBalance = 0;
}
QuickTimeParser::Track::~Track() {

3
common/formats/quicktime.h
View File

@ -210,6 +210,8 @@ protected:
GraphicsMode graphicsMode; // Transfer mode
uint16 opcolor[3]; // RGB values used in the transfer mode specified by graphicsMode.
uint16 soundBalance; // Controls the sound mix between the computer's two speakers, usually set to 0.
};
enum class MovieType {
@ -299,6 +301,7 @@ private:
int readSMI(Atom atom);
int readCTYP(Atom atom);
int readNAVG(Atom atom);
int readGMIN(Atom atom);
int readPINF(Atom atom);
};