From 120d6bf57cbed1be4d909b0633908fc32fed7013 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Thu, 28 Mar 2013 21:02:41 +0100
Subject: gl_video: add support for NV12

There's really no reason for this, but it feels nice being able to
support a weird pixel format.
---
 video/out/gl_video.c            | 14 +++++++++++++-
 video/out/gl_video_shaders.glsl |  8 +++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

(limited to 'video')

diff --git a/video/out/gl_video.c b/video/out/gl_video.c
index ee2cdffe6f..18991923f4 100644
--- a/video/out/gl_video.c
+++ b/video/out/gl_video.c
@@ -690,7 +690,12 @@ static void compile_shaders(struct gl_video *p)
     bool convert_input_to_linear = !p->is_linear_rgb &&
                                    (p->opts.srgb || p->use_lut_3d);
 
-    shader_def_opt(&header_conv, "USE_PLANAR", p->plane_count > 1);
+    if (p->image_format == IMGFMT_NV12) {
+        shader_def(&header_conv, "USE_CONV", "CONV_NV12");
+    } else if (p->plane_count > 1) {
+        shader_def(&header_conv, "USE_CONV", "CONV_PLANAR");
+    }
+
     shader_def_opt(&header_conv, "USE_GBRP", p->image_format == IMGFMT_GBRP);
     shader_def_opt(&header_conv, "USE_YGRAY", p->is_yuv && p->plane_count == 1);
     shader_def_opt(&header_conv, "USE_COLORMATRIX", p->is_yuv);
@@ -1603,6 +1608,13 @@ static bool init_format(int fmt, struct gl_video *init)
         }
     }
 
+    // YUV/half-packed
+    if (!supported && fmt == IMGFMT_NV12) {
+        supported = true;
+        plane_format[0] = IMGFMT_Y8;
+        plane_format[1] = IMGFMT_YA8;
+    }
+
     // RGB/planar
     if (!supported && fmt == IMGFMT_GBRP) {
         supported = true;
diff --git a/video/out/gl_video_shaders.glsl b/video/out/gl_video_shaders.glsl
index 5275c1fb22..4e2ccdde37 100644
--- a/video/out/gl_video_shaders.glsl
+++ b/video/out/gl_video_shaders.glsl
@@ -131,6 +131,9 @@ uniform vec2 dither_size;
 in vec2 texcoord;
 DECLARE_FRAGPARMS
 
+#define CONV_NV12 1
+#define CONV_PLANAR 2
+
 vec4 sample_bilinear(sampler2D tex, vec2 texsize, vec2 texcoord) {
     return texture(tex, texcoord);
 }
@@ -316,10 +319,13 @@ vec4 sample_sharpen5(sampler2D tex, vec2 texsize, vec2 texcoord) {
 }
 
 void main() {
-#ifdef USE_PLANAR
+#if USE_CONV == CONV_PLANAR
     vec3 color = vec3(SAMPLE_L(textures[0], textures_size[0], texcoord).r,
                       SAMPLE_C(textures[1], textures_size[1], texcoord).r,
                       SAMPLE_C(textures[2], textures_size[2], texcoord).r);
+#elif USE_CONV == CONV_NV12
+    vec3 color = vec3(SAMPLE_L(textures[0], textures_size[0], texcoord).r,
+                      SAMPLE_C(textures[1], textures_size[1], texcoord).rg);
 #else
     vec3 color = SAMPLE_L(textures[0], textures_size[0], texcoord).rgb;
 #endif
-- 
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