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1e7bdae284
Adds 6 public methods on FLAC::File mirroring RIFF::WAV::File's existing iXML/BEXT API: iXMLData/setiXMLData/hasiXMLData and the BEXT equivalents. Reads APPLICATION blocks (RFC 9639 § 8.4) carrying either the IANA- registered "riff" foreign-metadata wrapper or the direct "iXML" / "bext" application IDs used by some third-party tools (e.g. Sequoia). Writes the spec-blessed "riff"-wrapped form. Unrecognized application IDs and "riff"-wrapped chunks other than iXML/bext (e.g. "fmt ", "JUNK") flow through unmodified, so existing files round-trip without churn. Test coverage: read direct + riff-wrapped for both iXML and BEXT, write+reread round-trip, empty-clears-block, and an unknown-application- block preservation guard.
TagLib
TagLib Audio Metadata Library
TagLib is a library for reading and editing the metadata of several popular audio formats. Currently, it supports various metadata containers such as ID3v1, ID3v2 and Vorbis comments for MP3, MP4, AAC, Ogg, Opus, FLAC, Speex, APE, MPC, WavPack, WAV, AIFF, TrueAudio, Matroska, WebM, ASF, WMA, DSF, DFF and tracker (MOD, XM, S3M, IT) files.
TagLib is distributed under the GNU Lesser General Public License (LGPL) and Mozilla Public License (MPL). Essentially that means that it may be used in proprietary applications, but if changes are made to TagLib they must be contributed back to the project. Please review the licenses if you are considering using TagLib in your project.