[libcamera-devel] [PATCH 4/4] cam: sdl_sink: Add NV12 texture support

[Laurent Pinchart]

Extend the SDL sink with support for NV12 textures, useful on platforms
that don't support packed YUYV formats.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 src/cam/sdl_sink.cpp        |  3 +++
 src/cam/sdl_texture_yuv.cpp | 13 ++++++++++++-
 src/cam/sdl_texture_yuv.h   |  9 ++++++++-
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/src/cam/sdl_sink.cpp b/src/cam/sdl_sink.cpp
index 9675cf275186..23fe2b1e9f05 100644
--- a/src/cam/sdl_sink.cpp
+++ b/src/cam/sdl_sink.cpp
@@ -67,6 +67,9 @@ int SDLSink::configure(const libcamera::CameraConfiguration &config)
 		texture_ = std::make_unique<SDLTextureMJPG>(rect_);
 		break;
 #endif
+	case libcamera::formats::NV12:
+		texture_ = std::make_unique<SDLTextureNV12>(rect_, cfg.stride);
+		break;
 	case libcamera::formats::YUYV:
 		texture_ = std::make_unique<SDLTextureYUYV>(rect_, cfg.stride);
 		break;
diff --git a/src/cam/sdl_texture_yuv.cpp b/src/cam/sdl_texture_yuv.cpp
index a5721182a68b..431e836d2d2c 100644
--- a/src/cam/sdl_texture_yuv.cpp
+++ b/src/cam/sdl_texture_yuv.cpp
@@ -2,13 +2,24 @@
 /*
  * Copyright (C) 2022, Ideas on Board Oy
  *
- * sdl_texture_yuv.cpp - SDL Texture YUYV
+ * sdl_texture_yuv.cpp - SDL YUV Textures
  */
 
 #include "sdl_texture_yuv.h"
 
 using namespace libcamera;
 
+SDLTextureNV12::SDLTextureNV12(const SDL_Rect &rect, unsigned int stride)
+	: SDLTexture(rect, SDL_PIXELFORMAT_NV12, stride)
+{
+}
+
+void SDLTextureNV12::update(const std::vector<libcamera::Span<const uint8_t>> &data)
+{
+	SDL_UpdateNVTexture(ptr_, &rect_, data[0].data(), pitch_,
+			    data[1].data(), pitch_);
+}
+
 SDLTextureYUYV::SDLTextureYUYV(const SDL_Rect &rect, unsigned int stride)
 	: SDLTexture(rect, SDL_PIXELFORMAT_YUY2, stride)
 {
diff --git a/src/cam/sdl_texture_yuv.h b/src/cam/sdl_texture_yuv.h
index c9130298b91d..9da611fe0e36 100644
--- a/src/cam/sdl_texture_yuv.h
+++ b/src/cam/sdl_texture_yuv.h
@@ -2,13 +2,20 @@
 /*
  * Copyright (C) 2022, Ideas on Board Oy
  *
- * sdl_texture_yuyv.h - SDL Texture YUYV
+ * sdl_texture_yuyv.h - SDL YUV Textures
  */
 
 #pragma once
 
 #include "sdl_texture.h"
 
+class SDLTextureNV12 : public SDLTexture
+{
+public:
+	SDLTextureNV12(const SDL_Rect &rect, unsigned int stride);
+	void update(const std::vector<libcamera::Span<const uint8_t>> &data) override;
+};
+
 class SDLTextureYUYV : public SDLTexture
 {
 public:
-- 
Regards,

Laurent Pinchart