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authorNiklas Haas <git@nand.wakku.to>2016-05-30 19:56:58 +0200
committerwm4 <wm4@nowhere>2016-05-30 20:17:33 +0200
commit45c3e0f0d0c836158ab38db53156bb6461ad7437 (patch)
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parent098ff4174c6c9cc59e65c6f09b23b3adaee03983 (diff)
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vo_opengl: refactor HDR mechanism
Instead of doing HDR tone mapping on an ad-hoc basis inside pass_colormanage, the reference peak of an image is now part of the image params (alongside colorspace, gamma, etc.) and tone mapping is done whenever peak_src != peak_dst. To get sensible behavior when mixing HDR and SDR content and displays, target-brightness is a generic filler for "the assumed brightness of SDR content". This gets rid of the weird display_scaled hack, sets the framework for multiple HDR functions with difference reference peaks, and allows us to (in a future commit) autodetect the right source peak from the HDR metadata. (Apart from metadata, the source peak can also be controlled via vf_format. For HDR content this adjusts the overall image brightness, for SDR content it's like simulating a different exposure)
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@@ -1061,9 +1061,10 @@ Available video output drivers are:
``target-brightness=<1..100000>``
Specifies the display's approximate brightness in cd/m^2. When playing
- HDR content, video colors will be tone mapped to this target brightness
- using the algorithm specified by ``hdr-tone-mapping``. The default of
- 250 cd/m^2 corresponds to a typical consumer display.
+ HDR content on a SDR display (or SDR content on an HDR display), video
+ colors will be tone mapped to this target brightness using the
+ algorithm specified by ``hdr-tone-mapping``. The default of 250 cd/m^2
+ corresponds to a typical consumer display.
``hdr-tone-mapping=<value>``
Specifies the algorithm used for tone-mapping HDR images onto the