Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Niklas Haas	06f084468e	avutil/csp: add EOTF function definitions The existing av_csp_trc_func_from_id() mostly implements the OETF, except for PQ. As such, we are currently missing a precise definition of an ITU-R EOTF. Introduce the new functions av_csp_itu_eotf() and av_csp_itu_eotf_inv(), to fill this void. Note that this is not possible in all cases, e.g. AVCOL_TRC_LOG which has no corresponding EOTF definition in any ITU-R standard. Note that we cannot implement the proper HLG and SMPTE 428 OOTFs without access to all three color channels, because they are not independent per channel. As a result, we need to define them on double[3] instead of double (*func)(double).	2 months ago
Niklas Haas	bf0a6c4111	avutil/csp: add av_csp_trc_inv_from_id() Mathematical inverse of av_csp_trc_from_id(), plus testing to make sure it roundtrips correctly with the corresponding TRC.	2 months ago
Niklas Haas	feb5982f43	avutil/csp: eliminate redundant branch	2 months ago
Leo Izen	719a93f4e4	avutil/{color_utils, csp}: merge color_utils into csp and expose API libavutil/color_utils contains some avpriv_ symbols that map enum AVTransferCharacteristic values to gamma-curve approximations and to the actual transfer functions to invert them (i.e. -> linear). There's two issues with this: (1) avpriv is evil and should be avoided whenever possible (2) libavutil/csp.h exposes a public API for handling color that already handles primaries and matricies I don't see any reason this API has to be private, so this commit takes the functionality from avutil/color_utils and merges it into avutil/csp with an exposed av_ API rather than the previous avpriv_ API. Every reference to the previous API has been updated to point to the new one. color_utils.h has been deleted as well. This should not break any applications as it only contained avpriv_ symbols in the first place, so nothing in that header could be referenced by other applications. Signed-off-by: Leo Izen <leo.izen@gmail.com> Signed-off-by: Anton Khirnov <anton@khirnov.net>	2 years ago
Leo Izen	d42b410e05	avutil/csp: create public API for colorspace structs This commit moves some of the functionality from avfilter/colorspace into avutil/csp and exposes it as a public API so it can be used by libavcodec and/or libavformat. It also converts those structs from double values to AVRational to make regression testing easier and more consistent. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>	3 years ago