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c028d782c1
This automatically sets the gamma option depending on lighting conditions measured from the computer's ambient light sensor. sRGB – arguably the “sibling” to BT.709 for still images – has a reference viewing environment defined in its specification (IEC 61966-2-1:1999, see http://www.color.org/chardata/rgb/srgb.xalter). According to this data, the assumed ambient illuminance is 64 lux. This is the illuminance where the gamma that results from ICC color management is correct. On the other hand, BT.1886 formalizes that the gamma level for dim environments to be 2.40, and Apple resources (WWDC12: 2012 Session 523: Best practices for color management) define the BT.1886 dim at 16 lux. So the logic we apply is: * >= 64lux -> 1.961 gamma * =< 16lux -> 2.400 gamma * 16lux < x < 64lux -> logaritmic rescale of lux to gamma. The human perception of illuminance roughly follows a logaritmic scale of lux [1]. [1]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd319008%28v=vs.85%29.aspx
100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MP_GL_VIDEO_H
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#define MP_GL_VIDEO_H
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#include <stdbool.h>
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#include "options/m_option.h"
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#include "sub/osd.h"
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#include "gl_common.h"
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struct lut3d {
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uint16_t *data;
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int size[3];
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};
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struct gl_video_opts {
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char *scalers[2];
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char *dscaler;
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float scaler_params[2][2];
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float scaler_radius[2];
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float scaler_antiring[2];
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float gamma;
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int gamma_auto;
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int srgb;
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int linear_scaling;
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int fancy_downscaling;
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int sigmoid_upscaling;
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float sigmoid_center;
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float sigmoid_slope;
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int scaler_resizes_only;
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int npot;
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int pbo;
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int dither_depth;
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int dither_algo;
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int dither_size;
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int temporal_dither;
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int fbo_format;
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int alpha_mode;
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int chroma_location;
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int use_rectangle;
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struct m_color background;
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int smoothmotion;
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float smoothmotion_threshold;
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};
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extern const struct m_sub_options gl_video_conf;
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extern const struct gl_video_opts gl_video_opts_hq_def;
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extern const struct gl_video_opts gl_video_opts_def;
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struct gl_video;
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struct gl_video *gl_video_init(GL *gl, struct mp_log *log, struct osd_state *osd);
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void gl_video_uninit(struct gl_video *p);
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void gl_video_set_options(struct gl_video *p, struct gl_video_opts *opts);
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bool gl_video_check_format(struct gl_video *p, int mp_format);
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void gl_video_config(struct gl_video *p, struct mp_image_params *params);
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void gl_video_set_output_depth(struct gl_video *p, int r, int g, int b);
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void gl_video_set_lut3d(struct gl_video *p, struct lut3d *lut3d);
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void gl_video_upload_image(struct gl_video *p, struct mp_image *img);
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void gl_video_render_frame(struct gl_video *p, int fbo, struct frame_timing *t);
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void gl_video_resize(struct gl_video *p, struct mp_rect *window,
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struct mp_rect *src, struct mp_rect *dst,
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struct mp_osd_res *osd, bool vflip);
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void gl_video_get_colorspace(struct gl_video *p, struct mp_image_params *params);
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struct mp_csp_equalizer;
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struct mp_csp_equalizer *gl_video_eq_ptr(struct gl_video *p);
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void gl_video_eq_update(struct gl_video *p);
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void gl_video_set_debug(struct gl_video *p, bool enable);
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void gl_video_resize_redraw(struct gl_video *p, int w, int h);
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float gl_video_scale_ambient_lux(float lmin, float lmax,
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float rmin, float rmax, float lux);
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void gl_video_set_ambient_lux(struct gl_video *p, int lux);
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void gl_video_set_gl_state(struct gl_video *p);
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void gl_video_unset_gl_state(struct gl_video *p);
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void gl_video_reset(struct gl_video *p);
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bool gl_video_showing_interpolated_frame(struct gl_video *p);
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struct gl_hwdec;
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void gl_video_set_hwdec(struct gl_video *p, struct gl_hwdec *hwdec);
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#endif
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