/**
* A stateless method to retrieve all the VirtualTracks that are a part of a Composition
*
* @param cpl - a payload corresponding to the Composition Playlist
* @return list of VirtualTracks
* @throws IOException - any I/O related error is exposed through an IOException
*/
public static List<? extends VirtualTrack> getVirtualTracks(PayloadRecord cpl)
throws IOException {
IMFErrorLogger imfErrorLogger = new IMFErrorLoggerImpl();
List<ErrorLogger.ErrorObject> errorList = validateCPL(cpl);
imfErrorLogger.addAllErrors(errorList);
if (imfErrorLogger.hasFatalErrors()) {
throw new IMFException("Virtual track failed validation", imfErrorLogger);
}
Composition composition = new Composition(new ByteArrayByteRangeProvider(cpl.getPayload()));
return composition.getVirtualTracks();
}
/**
* A stateless method that can be used to determine if a Composition is conformant. Conformance
* checks perform deeper inspection of the Composition and the EssenceDescriptors corresponding to
* all the Virtual Tracks that are a part of the Composition
*
* @param cplPayloadRecord a payload record corresponding to the Composition payload
* @param essencesHeaderPartitionPayloads list of payload records containing the raw bytes of the
* HeaderPartitions of the IMF Track files that are a part of the Virtual Track/s in the
* Composition
* @return list of error messages encountered while performing conformance validation of the
* Composition document
* @throws IOException - any I/O related error is exposed through an IOException
*/
public static List<ErrorLogger.ErrorObject> areAllVirtualTracksInCPLConformed(
PayloadRecord cplPayloadRecord, List<PayloadRecord> essencesHeaderPartitionPayloads)
throws IOException {
IMFErrorLogger imfErrorLogger = new IMFErrorLoggerImpl();
Composition composition =
new Composition(new ByteArrayByteRangeProvider(cplPayloadRecord.getPayload()));
imfErrorLogger.addAllErrors(composition.getErrors());
List<VirtualTrack> virtualTracks = new ArrayList<>(composition.getVirtualTracks());
imfErrorLogger.addAllErrors(
checkVirtualTrackAndEssencesHeaderPartitionPayloadRecords(
virtualTracks, essencesHeaderPartitionPayloads));
if (imfErrorLogger.hasFatalErrors()) {
return imfErrorLogger.getErrors();
}
imfErrorLogger.addAllErrors(
conformVirtualTracksInCPL(cplPayloadRecord, essencesHeaderPartitionPayloads, true));
return imfErrorLogger.getErrors();
}