105aafbc96
Also, fixed an issue with the new conversion shader not compiling properly on some video devices
136 lines
3.6 KiB
Plaintext
136 lines
3.6 KiB
Plaintext
/******************************************************************************
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Copyright (C) 2014 by Hugh Bailey <obs.jim@gmail.com>
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This program 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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This program 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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//#define DEBUGGING
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uniform float4x4 ViewProj;
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uniform float u_plane_offset;
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uniform float v_plane_offset;
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uniform float width;
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uniform float height;
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uniform float width_i;
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uniform float height_i;
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uniform float width_d2;
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uniform float height_d2;
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uniform float width_d2_i;
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uniform float height_d2_i;
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uniform float input_height;
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uniform texture2d image;
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sampler_state def_sampler {
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Filter = Linear;
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AddressU = Clamp;
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AddressV = Clamp;
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};
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struct VertInOut {
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float4 pos : POSITION;
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float2 uv : TEXCOORD0;
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};
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VertInOut VSDefault(VertInOut vert_in)
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{
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VertInOut vert_out;
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vert_out.pos = mul(float4(vert_in.pos.xyz, 1.0), ViewProj);
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vert_out.uv = vert_in.uv;
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return vert_out;
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}
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float4 PSPlanar420(VertInOut vert_in) : TARGET
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{
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#ifdef _OPENGL
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float v_mul = floor((1.0 - vert_in.uv.y) * input_height);
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#else
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float v_mul = floor(vert_in.uv.y * input_height);
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#endif
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float byte_offset = floor((v_mul + vert_in.uv.x) * width) * 4.0;
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float2 sample_pos[4];
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if (byte_offset < u_plane_offset) {
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#ifdef DEBUGGING
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return float4(1.0f, 1.0f, 1.0f, 1.0f);
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#endif
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float lum_u = fmod(byte_offset, width) * width_i;
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float lum_v = floor(byte_offset * width_i) * height_i;
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/* move to texel centers to sample the 4 pixels properly */
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lum_u += width_i * 0.5;
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lum_v += height_i * 0.5;
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sample_pos[0] = float2(lum_u, lum_v);
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sample_pos[1] = float2(lum_u += width_i, lum_v);
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sample_pos[2] = float2(lum_u += width_i, lum_v);
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sample_pos[3] = float2(lum_u + width_i, lum_v);
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} else {
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#ifdef DEBUGGING
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return ((byte_offset < v_plane_offset) ?
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float4(0.5f, 0.5f, 0.5f, 0.5f) :
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float4(0.2f, 0.2f, 0.2f, 0.2f));
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#endif
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float new_offset = byte_offset -
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((byte_offset < v_plane_offset) ?
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u_plane_offset : v_plane_offset);
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float ch_u = fmod(new_offset, width_d2) * width_d2_i;
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float ch_v = floor(new_offset * width_d2_i) * height_d2_i;
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float width_i2 = width_i*2.0;
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/* move to the borders of each set of 4 pixels to force it
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* to do bilinear averaging */
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ch_u += width_i;
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ch_v += height_i;
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sample_pos[0] = float2(ch_u, ch_v);
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sample_pos[1] = float2(ch_u += width_i2, ch_v);
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sample_pos[2] = float2(ch_u += width_i2, ch_v);
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sample_pos[3] = float2(ch_u + width_i2, ch_v);
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}
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float4x4 out_val = float4x4(
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image.Sample(def_sampler, sample_pos[0]),
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image.Sample(def_sampler, sample_pos[1]),
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image.Sample(def_sampler, sample_pos[2]),
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image.Sample(def_sampler, sample_pos[3])
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);
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out_val = transpose(out_val);
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if (byte_offset < u_plane_offset)
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return out_val[1];
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else if (byte_offset < v_plane_offset)
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return out_val[0];
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else
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return out_val[2];
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}
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technique Planar420
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{
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pass
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{
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vertex_shader = VSDefault(vert_in);
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pixel_shader = PSPlanar420(vert_in);
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}
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}
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