Boolean OggFileParser::parse() {
try {
while (1) {
switch (fCurrentParseState) {
case PARSING_START_OF_FILE: {
if (parseStartOfFile()) return True;
}
case PARSING_AND_DELIVERING_PAGES: {
parseAndDeliverPages();
}
case DELIVERING_PACKET_WITHIN_PAGE: {
if (deliverPacketWithinPage()) return False;
}
}
}
} catch (int /*e*/) {
#ifdef DEBUG
fprintf(stderr, "OggFileParser::parse() EXCEPTION (This is normal behavior - *not* an error)\n");
#endif
return False; // the parsing got interrupted
}
}
Boolean MatroskaFileParser::parse() {
Boolean areDone = False;
try {
do {
switch (fCurrentParseState) {
case PARSING_START_OF_FILE: {
areDone = parseStartOfFile();
break;
}
case LOOKING_FOR_TRACKS: {
lookForNextTrack();
break;
}
case PARSING_TRACK: {
areDone = parseTrack();
if (areDone && fOurFile.fCuesOffset > 0) {
// We've finished parsing the 'Track' information. There are also 'Cues' in the file, so parse those before finishing:
// Seek to the specified position in the file. We were already told that the 'Cues' begins there:
#ifdef DEBUG
fprintf(stderr, "Seeking to file position %llu (the previously-reported location of 'Cues')\n", fOurFile.fCuesOffset);
#endif
seekToFilePosition(fOurFile.fCuesOffset);
fCurrentParseState = PARSING_CUES;
areDone = False;
}
break;
}
case PARSING_CUES: {
areDone = parseCues();
break;
}
case LOOKING_FOR_CLUSTER: {
if (fOurFile.fClusterOffset > 0) {
// Optimization: Seek to the specified position in the file. We were already told that the 'Cluster' begins there:
#ifdef DEBUG
fprintf(stderr, "Optimization: Seeking to file position %llu (the previously-reported location of a 'Cluster')\n", fOurFile.fClusterOffset);
#endif
seekToFilePosition(fOurFile.fClusterOffset);
}
fCurrentParseState = LOOKING_FOR_BLOCK;
break;
}
case LOOKING_FOR_BLOCK: {
lookForNextBlock();
break;
}
case PARSING_BLOCK: {
parseBlock();
break;
}
case DELIVERING_FRAME_WITHIN_BLOCK: {
if (!deliverFrameWithinBlock()) return False;
break;
}
case DELIVERING_FRAME_BYTES: {
deliverFrameBytes();
return False; // Halt parsing for now. A new 'read' from downstream will cause parsing to resume.
break;
}
}
} while (!areDone);
return True;
} catch (int /*e*/) {
#ifdef DEBUG
fprintf(stderr, "MatroskaFileParser::parse() EXCEPTION (This is normal behavior - *not* an error)\n");
#endif
return False; // the parsing got interrupted
}
}
