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 } }