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/*
* This file is part of libplacebo.
*
* libplacebo is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* libplacebo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with libplacebo. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "common.h"
#include <libplacebo/shaders/film_grain.h>
bool pl_needs_fg_av1(const struct pl_film_grain_params *);
bool pl_needs_fg_h274(const struct pl_film_grain_params *);
bool pl_shader_fg_av1(pl_shader, pl_shader_obj *, const struct pl_film_grain_params *);
bool pl_shader_fg_h274(pl_shader, pl_shader_obj *, const struct pl_film_grain_params *);
// Common helper function
static inline enum pl_channel channel_map(int i, const struct pl_film_grain_params *params)
{
static const enum pl_channel map_rgb[3] = {
[PL_CHANNEL_G] = PL_CHANNEL_Y,
[PL_CHANNEL_B] = PL_CHANNEL_CB,
[PL_CHANNEL_R] = PL_CHANNEL_CR,
};
static const enum pl_channel map_xyz[3] = {
[1] = PL_CHANNEL_Y, // Y
[2] = PL_CHANNEL_CB, // Z
[0] = PL_CHANNEL_CR, // X
};
if (i >= params->components)
return PL_CHANNEL_NONE;
int comp = params->component_mapping[i];
if (comp < 0 || comp > 2)
return PL_CHANNEL_NONE;
switch (params->repr->sys) {
case PL_COLOR_SYSTEM_UNKNOWN:
case PL_COLOR_SYSTEM_RGB:
return map_rgb[comp];
case PL_COLOR_SYSTEM_XYZ:
return map_xyz[comp];
case PL_COLOR_SYSTEM_BT_601:
case PL_COLOR_SYSTEM_BT_709:
case PL_COLOR_SYSTEM_SMPTE_240M:
case PL_COLOR_SYSTEM_BT_2020_NC:
case PL_COLOR_SYSTEM_BT_2020_C:
case PL_COLOR_SYSTEM_BT_2100_PQ:
case PL_COLOR_SYSTEM_BT_2100_HLG:
case PL_COLOR_SYSTEM_DOLBYVISION:
case PL_COLOR_SYSTEM_YCGCO:
return comp;
case PL_COLOR_SYSTEM_COUNT:
break;
}
pl_unreachable();
}
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