void AviDecoder::runHandle(uint32 tag) {
assert (_fileStream);
if (_fileStream->eos())
return;
debug (3, "Decoding tag %s", tag2str(tag));
switch (tag) {
case ID_RIFF:
/*_filesize = */_fileStream->readUint32LE();
if (_fileStream->readUint32BE() != ID_AVI)
error("RIFF file is not an AVI video");
break;
case ID_LIST:
handleList();
break;
case ID_AVIH:
_header.size = _fileStream->readUint32LE();
_header.microSecondsPerFrame = _fileStream->readUint32LE();
_header.maxBytesPerSecond = _fileStream->readUint32LE();
_header.padding = _fileStream->readUint32LE();
_header.flags = _fileStream->readUint32LE();
_header.totalFrames = _fileStream->readUint32LE();
_header.initialFrames = _fileStream->readUint32LE();
_header.streams = _fileStream->readUint32LE();
_header.bufferSize = _fileStream->readUint32LE();
_header.width = _fileStream->readUint32LE();
_header.height = _fileStream->readUint32LE();
//Ignore 16 bytes of reserved data
_fileStream->skip(16);
break;
case ID_STRH:
handleStreamHeader();
break;
case ID_STRD: // Extra stream info, safe to ignore
case ID_VEDT: // Unknown, safe to ignore
case ID_JUNK: // Alignment bytes, should be ignored
{
uint32 junkSize = _fileStream->readUint32LE();
_fileStream->skip(junkSize + (junkSize & 1)); // Alignment
} break;
case ID_IDX1:
_ixInfo.size = _fileStream->readUint32LE();
_ixInfo.indices = new AVIOLDINDEX::Index[_ixInfo.size / 16];
debug (0, "%d Indices", (_ixInfo.size / 16));
for (uint32 i = 0; i < (_ixInfo.size / 16); i++) {
_ixInfo.indices[i].id = _fileStream->readUint32BE();
_ixInfo.indices[i].flags = _fileStream->readUint32LE();
_ixInfo.indices[i].offset = _fileStream->readUint32LE();
_ixInfo.indices[i].size = _fileStream->readUint32LE();
debug (0, "Index %d == Tag \'%s\', Offset = %d, Size = %d", i, tag2str(_ixInfo.indices[i].id), _ixInfo.indices[i].offset, _ixInfo.indices[i].size);
}
break;
default:
error ("Unknown tag \'%s\' found", tag2str(tag));
}
}
bool AVIDecoder::parseNextChunk() {
uint32 tag = _fileStream->readUint32BE();
uint32 size = _fileStream->readUint32LE();
if (_fileStream->eos())
return false;
debug(3, "Decoding tag %s", tag2str(tag));
switch (tag) {
case ID_LIST:
handleList(size);
break;
case ID_AVIH:
_header.size = size;
_header.microSecondsPerFrame = _fileStream->readUint32LE();
_header.maxBytesPerSecond = _fileStream->readUint32LE();
_header.padding = _fileStream->readUint32LE();
_header.flags = _fileStream->readUint32LE();
_header.totalFrames = _fileStream->readUint32LE();
_header.initialFrames = _fileStream->readUint32LE();
_header.streams = _fileStream->readUint32LE();
_header.bufferSize = _fileStream->readUint32LE();
_header.width = _fileStream->readUint32LE();
_header.height = _fileStream->readUint32LE();
// Ignore 16 bytes of reserved data
_fileStream->skip(16);
break;
case ID_STRH:
handleStreamHeader(size);
break;
case ID_STRD: // Extra stream info, safe to ignore
case ID_VEDT: // Unknown, safe to ignore
case ID_JUNK: // Alignment bytes, should be ignored
case ID_ISFT: // Metadata, safe to ignore
case ID_DISP: // Metadata, should be safe to ignore
skipChunk(size);
break;
case ID_IDX1:
debug(0, "%d Indices", size / 16);
for (uint32 i = 0; i < size / 16; i++) {
OldIndex indexEntry;
indexEntry.id = _fileStream->readUint32BE();
indexEntry.flags = _fileStream->readUint32LE();
indexEntry.offset = _fileStream->readUint32LE() + _movieListStart - 4; // Adjust to absolute
indexEntry.size = _fileStream->readUint32LE();
_indexEntries.push_back(indexEntry);
debug(0, "Index %d == Tag \'%s\', Offset = %d, Size = %d (Flags = %d)", i, tag2str(indexEntry.id), indexEntry.offset, indexEntry.size, indexEntry.flags);
}
break;
default:
error("Unknown tag \'%s\' found", tag2str(tag));
}
return true;
}
bool AVIDecoder::parseNextChunk() {
uint32 tag = _fileStream->readUint32BE();
uint32 size = _fileStream->readUint32LE();
if (_fileStream->eos())
return false;
debug(6, "Decoding tag %s", tag2str(tag));
switch (tag) {
case ID_LIST:
handleList(size);
break;
case ID_AVIH:
_header.size = size;
_header.microSecondsPerFrame = _fileStream->readUint32LE();
_header.maxBytesPerSecond = _fileStream->readUint32LE();
_header.padding = _fileStream->readUint32LE();
_header.flags = _fileStream->readUint32LE();
_header.totalFrames = _fileStream->readUint32LE();
_header.initialFrames = _fileStream->readUint32LE();
_header.streams = _fileStream->readUint32LE();
_header.bufferSize = _fileStream->readUint32LE();
_header.width = _fileStream->readUint32LE();
_header.height = _fileStream->readUint32LE();
// Ignore 16 bytes of reserved data
_fileStream->skip(16);
break;
case ID_STRH:
handleStreamHeader(size);
break;
case ID_STRD: // Extra stream info, safe to ignore
case ID_VEDT: // Unknown, safe to ignore
case ID_JUNK: // Alignment bytes, should be ignored
case ID_JUNQ: // Same as JUNK, safe to ignore
case ID_ISFT: // Metadata, safe to ignore
case ID_DISP: // Metadata, should be safe to ignore
case ID_DMLH: // OpenDML extension, contains an extra total frames field, safe to ignore
skipChunk(size);
break;
case ID_STRN: // Metadata, safe to ignore
readStreamName(size);
break;
case ID_IDX1:
readOldIndex(size);
break;
default:
error("Unknown tag \'%s\' found", tag2str(tag));
}
return true;
}
