From 43d3f84993bef136c47210b7f9e4417a7e5c8b20 Mon Sep 17 00:00:00 2001
From: Sergey Stepanov <sergystepanov@gmail.com>
Date: Fri, 8 Mar 2024 18:43:23 +0300
Subject: [PATCH] Add support of the 0RGB1555 pixel format

---
 pkg/encoder/encoder.go                         | 2 ++
 pkg/encoder/yuv/libyuv/libyuv.go               | 2 ++
 pkg/encoder/yuv/yuv.go                         | 3 ++-
 pkg/worker/caged/libretro/nanoarch/nanoarch.go | 2 --
 4 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/pkg/encoder/encoder.go b/pkg/encoder/encoder.go
index a323290b..550f75d1 100644
--- a/pkg/encoder/encoder.go
+++ b/pkg/encoder/encoder.go
@@ -97,6 +97,8 @@ func (v *Video) SetPixFormat(f uint32) {
 	}
 
 	switch f {
+	case 0:
+		v.pf = yuv.PixFmt(yuv.FourccRgb0)
 	case 1:
 		v.pf = yuv.PixFmt(yuv.FourccArgb)
 	case 2:
diff --git a/pkg/encoder/yuv/libyuv/libyuv.go b/pkg/encoder/yuv/libyuv/libyuv.go
index e7a19739..07c0b8c1 100644
--- a/pkg/encoder/yuv/libyuv/libyuv.go
+++ b/pkg/encoder/yuv/libyuv/libyuv.go
@@ -35,6 +35,7 @@ enum FourCC {
   FOURCC_I420 = FOURCC('I', '4', '2', '0'),
   FOURCC_ARGB = FOURCC('A', 'R', 'G', 'B'),
   FOURCC_ABGR = FOURCC('A', 'B', 'G', 'R'),
+  FOURCC_RGBO = FOURCC('R', 'G', 'B', 'O'),
   FOURCC_RGBP = FOURCC('R', 'G', 'B', 'P'),  // rgb565 LE.
   FOURCC_ANY = -1,
 };
@@ -102,6 +103,7 @@ import "fmt"
 const FourccRgbp uint32 = C.FOURCC_RGBP
 const FourccArgb uint32 = C.FOURCC_ARGB
 const FourccAbgr uint32 = C.FOURCC_ABGR
+const FourccRgb0 uint32 = C.FOURCC_RGBO
 
 func Y420(src []byte, dst []byte, _, h, stride int, dw, dh int, rot uint, pix uint32, cx, cy int) {
 	cw := (dw + 1) / 2
diff --git a/pkg/encoder/yuv/yuv.go b/pkg/encoder/yuv/yuv.go
index 82f59ea7..25d591d1 100644
--- a/pkg/encoder/yuv/yuv.go
+++ b/pkg/encoder/yuv/yuv.go
@@ -25,6 +25,7 @@ type PixFmt uint32
 const FourccRgbp = libyuv.FourccRgbp
 const FourccArgb = libyuv.FourccArgb
 const FourccAbgr = libyuv.FourccAbgr
+const FourccRgb0 = libyuv.FourccRgb0
 
 func NewYuvConv(w, h int, scale float64) Conv {
 	if scale < 1 {
@@ -47,7 +48,7 @@ func (c *Conv) Process(frame RawFrame, rot uint, pf PixFmt) []byte {
 	}
 
 	stride := frame.Stride >> 2
-	if pf == PixFmt(libyuv.FourccRgbp) {
+	if pf == PixFmt(libyuv.FourccRgbp) || pf == PixFmt(libyuv.FourccRgb0) {
 		stride = frame.Stride >> 1
 	}
 
diff --git a/pkg/worker/caged/libretro/nanoarch/nanoarch.go b/pkg/worker/caged/libretro/nanoarch/nanoarch.go
index 0ae21175..95cd24a6 100644
--- a/pkg/worker/caged/libretro/nanoarch/nanoarch.go
+++ b/pkg/worker/caged/libretro/nanoarch/nanoarch.go
@@ -378,8 +378,6 @@ func videoSetPixelFormat(format uint32) (C.bool, error) {
 		if err := graphics.SetPixelFormat(graphics.UnsignedShort5551); err != nil {
 			return false, fmt.Errorf("unknown pixel format %v", Nan0.Video.PixFmt)
 		}
-		// format is not implemented
-		return false, fmt.Errorf("unsupported pixel type %v converter", format)
 	case C.RETRO_PIXEL_FORMAT_XRGB8888:
 		Nan0.Video.PixFmt = RGBA8888Rev
 		if err := graphics.SetPixelFormat(graphics.UnsignedInt8888Rev); err != nil {