From b3357754c19918c364dca69a237d11ba123fbc56 Mon Sep 17 00:00:00 2001 From: Matthew Waters Date: Tue, 21 Jul 2015 15:39:35 +1000 Subject: [PATCH] glcolorconvert: add RGB to NV12/NV21 conversion --- gst-libs/gst/gl/gstglcolorconvert.c | 43 +++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/gst-libs/gst/gl/gstglcolorconvert.c b/gst-libs/gst/gl/gstglcolorconvert.c index 68747f8..5915a39 100644 --- a/gst-libs/gst/gl/gstglcolorconvert.c +++ b/gst-libs/gst/gl/gstglcolorconvert.c @@ -320,6 +320,35 @@ static const char frag_NV12_NV21_to_RGB[] = { "}" }; +/* RGB to NV12/NV21 conversion */ +/* NV12: u, v + NV21: v, u */ +static const char frag_RGB_to_NV12_NV21[] = { + "#ifdef GL_ES\n" + "precision mediump float;\n" + "#endif\n" + "varying vec2 v_texcoord;\n" + "uniform sampler2D tex;\n" + "uniform vec2 tex_scale0;\n" + "uniform vec2 tex_scale1;\n" + "uniform vec2 tex_scale2;\n" + RGB_TO_YUV_COEFFICIENTS + "void main(void) {\n" + " float y, u, v;\n" + " vec4 texel, uv_texel;\n" + " texel = texture2D(tex, v_texcoord * tex_scale0).%c%c%c%c;\n" + " uv_texel = texture2D(tex, v_texcoord * tex_scale0 * 2.0).%c%c%c%c;\n" + " y = dot(texel.rgb, coeff1);\n" + " u = dot(uv_texel.rgb, coeff2);\n" + " v = dot(uv_texel.rgb, coeff3);\n" + " y += offset.x;\n" + " u += offset.y;\n" + " v += offset.z;\n" + " gl_FragData[0] = vec4(y, 0.0, 0.0, 1.0);\n" + " gl_FragData[1] = vec4(%c, %c, 0.0, 1.0);\n" + "}" +}; + /* YUY2:r,g,a UYVY:a,b,r */ static const gchar frag_YUY2_UYVY_to_RGB[] = @@ -1128,6 +1157,20 @@ _RGB_to_YUV (GstGLColorConvert * convert) "u", "y", "v", "y"); info->out_n_textures = 1; break; + case GST_VIDEO_FORMAT_NV12: + info->frag_prog = g_strdup_printf (frag_RGB_to_NV12_NV21, + pixel_order[0], pixel_order[1], pixel_order[2], pixel_order[3], + pixel_order[0], pixel_order[1], pixel_order[2], pixel_order[3], + 'u', 'v'); + info->out_n_textures = 2; + break; + case GST_VIDEO_FORMAT_NV21: + info->frag_prog = g_strdup_printf (frag_RGB_to_NV12_NV21, + pixel_order[0], pixel_order[1], pixel_order[2], pixel_order[3], + pixel_order[0], pixel_order[1], pixel_order[2], pixel_order[3], + 'v', 'u'); + info->out_n_textures = 2; + break; default: break; } -- 2.7.4