cam: sdl_texture_yuyv: Make line stride configurable

The line stride of the texture is currently hardcoded based on the image
width, which may not match the real stride. Use the stride value from
the stream configuration instead.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Eric Curtin <ecurtin@redhat.com>
Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/cam/sdl_sink.cpp

@@ -68,7 +68,7 @@ int SDLSink::configure(const libcamera::CameraConfiguration &config)
 		break;
 #endif
 	case libcamera::formats::YUYV:
-		texture_ = std::make_unique<SDLTextureYUYV>(rect_);
+		texture_ = std::make_unique<SDLTextureYUYV>(rect_, cfg.stride);
 		break;
 	default:
 		std::cerr << "Unsupported pixel format "

src/cam/sdl_texture_yuyv.cpp

@@ -9,8 +9,8 @@
 
 using namespace libcamera;
 
-SDLTextureYUYV::SDLTextureYUYV(const SDL_Rect &rect)
-	: SDLTexture(rect, SDL_PIXELFORMAT_YUY2, 4 * ((rect.w + 1) / 2))
+SDLTextureYUYV::SDLTextureYUYV(const SDL_Rect &rect, unsigned int stride)
+	: SDLTexture(rect, SDL_PIXELFORMAT_YUY2, stride)
 {
 }
 

src/cam/sdl_texture_yuyv.h

@@ -12,6 +12,6 @@
 class SDLTextureYUYV : public SDLTexture
 {
 public:
-	SDLTextureYUYV(const SDL_Rect &rect);
+	SDLTextureYUYV(const SDL_Rect &rect, unsigned int stride);
 	void update(libcamera::Span<const uint8_t> data) override;
 };