src/main/java/com/netflix/imflibrary/app/IMPAnalyzer.java [112:144]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    private static PayloadRecord getHeaderPartitionPayloadRecord(ResourceByteRangeProvider resourceByteRangeProvider, IMFErrorLogger imfErrorLogger) throws IOException {
        long archiveFileSize = resourceByteRangeProvider.getResourceSize();
        long rangeEnd = archiveFileSize - 1;
        long rangeStart = archiveFileSize - 4;
        if(rangeStart < 0 ) {
            return null;
        }
        byte[] bytes = resourceByteRangeProvider.getByteRangeAsBytes(rangeStart, rangeEnd);
        PayloadRecord payloadRecord = new PayloadRecord(bytes, PayloadRecord.PayloadAssetType.EssenceFooter4Bytes, rangeStart, rangeEnd);
        Long randomIndexPackSize = IMPValidator.getRandomIndexPackSize(payloadRecord);

        rangeStart = archiveFileSize - randomIndexPackSize;
        rangeEnd = archiveFileSize - 1;
        if(rangeStart < 0 ) {
            return null;
        }

        byte[] randomIndexPackBytes = resourceByteRangeProvider.getByteRangeAsBytes(rangeStart, rangeEnd);
        PayloadRecord randomIndexPackPayload = new PayloadRecord(randomIndexPackBytes, PayloadRecord.PayloadAssetType.EssencePartition, rangeStart, rangeEnd);
        List<Long> partitionByteOffsets = IMPValidator.getEssencePartitionOffsets(randomIndexPackPayload, randomIndexPackSize);

        if (partitionByteOffsets.size() >= 2) {
            rangeStart = partitionByteOffsets.get(0);
            rangeEnd = partitionByteOffsets.get(1) - 1;
            byte[] headerPartitionBytes = resourceByteRangeProvider.getByteRangeAsBytes(rangeStart, rangeEnd);
            PayloadRecord headerParitionPayload = new PayloadRecord(headerPartitionBytes, PayloadRecord.PayloadAssetType.EssencePartition, rangeStart, rangeEnd);
            return headerParitionPayload;
        }


        return null;

    }
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



src/main/java/com/netflix/imflibrary/app/IMPFixer.java [156:188]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    public static PayloadRecord getHeaderPartitionPayloadRecord(ResourceByteRangeProvider resourceByteRangeProvider, IMFErrorLogger imfErrorLogger) throws IOException {
        long archiveFileSize = resourceByteRangeProvider.getResourceSize();
        long rangeEnd = archiveFileSize - 1;
        long rangeStart = archiveFileSize - 4;
        if(rangeStart < 0 ) {
            return null;
        }
        byte[] bytes = resourceByteRangeProvider.getByteRangeAsBytes(rangeStart, rangeEnd);
        PayloadRecord payloadRecord = new PayloadRecord(bytes, PayloadRecord.PayloadAssetType.EssenceFooter4Bytes, rangeStart, rangeEnd);
        Long randomIndexPackSize = IMPValidator.getRandomIndexPackSize(payloadRecord);

        rangeStart = archiveFileSize - randomIndexPackSize;
        rangeEnd = archiveFileSize - 1;
        if(rangeStart < 0 ) {
            return null;
        }

        byte[] randomIndexPackBytes = resourceByteRangeProvider.getByteRangeAsBytes(rangeStart, rangeEnd);
        PayloadRecord randomIndexPackPayload = new PayloadRecord(randomIndexPackBytes, PayloadRecord.PayloadAssetType.EssencePartition, rangeStart, rangeEnd);
        List<Long> partitionByteOffsets = IMPValidator.getEssencePartitionOffsets(randomIndexPackPayload, randomIndexPackSize);

        if (partitionByteOffsets.size() >= 2) {
            rangeStart = partitionByteOffsets.get(0);
            rangeEnd = partitionByteOffsets.get(1) - 1;
            byte[] headerPartitionBytes = resourceByteRangeProvider.getByteRangeAsBytes(rangeStart, rangeEnd);
            PayloadRecord headerParitionPayload = new PayloadRecord(headerPartitionBytes, PayloadRecord.PayloadAssetType.EssencePartition, rangeStart, rangeEnd);
            return headerParitionPayload;
        }


        return null;

    }
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -