Hello, In attach two patchs to add support for hapqa alpha decoding More info can be found here https://github.com/Vidvox/hap/blob/master/documentation/HapVideoDRAFT.md
Part 1 : 0006-libavodec-texturedsp-add-rgtc1u_alpha-uncompress-fun add a new func into texture dsp, in order to decompress rgtc1u only in the alpha channel Useful for Hapqa, who use 2 textures : DXT5-YCoCg-scaled for RGB and RGTC1 for alpha and avoid to use two intermediate frame Part 2 : 0007-libavcodec-hapdec-add-support-for-hapqa-decoding This is the modification of the hap decoder Change are more invasive, that what i expected but the two texture mode of this codec, need lot of changes in several place Samples can be found here (create with Quicktime Plugin, an remux using the official lib, in order to have the 3 main case of this codec) https://we.tl/g7YFdpri1P Need to be apply after patch in discussion libavcodec/hapdec : add support for HapAphaOnly decoding Comments Welcome Martin Jokyo Images
0006-libavodec-texturedsp-add-rgtc1u_alpha-uncompress-fun.patch
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0007-libavcodec-hapdec-add-support-for-hapqa-decoding.patch
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