edgefirst_image/

g2d.rs

// SPDX-FileCopyrightText: Copyright 2025 Au-Zone Technologies
// SPDX-License-Identifier: Apache-2.0

#![cfg(target_os = "linux")]

use crate::{
    CPUProcessor, Crop, Error, Flip, ImageProcessorTrait, Result, Rotation, TensorImage,
    TensorImageRef, NV12, RGB, RGBA, YUYV,
};
use edgefirst_tensor::Tensor;
use g2d_sys::{G2DFormat, G2DPhysical, G2DSurface, G2D};
use std::{os::fd::AsRawFd, time::Instant};

/// G2DConverter implements the ImageProcessor trait using the NXP G2D
/// library for hardware-accelerated image processing on i.MX platforms.
#[derive(Debug)]
pub struct G2DProcessor {
    g2d: G2D,
}

unsafe impl Send for G2DProcessor {}
unsafe impl Sync for G2DProcessor {}

impl G2DProcessor {
    /// Creates a new G2DConverter instance.
    pub fn new() -> Result<Self> {
        let mut g2d = G2D::new("libg2d.so.2")?;
        g2d.set_bt709_colorspace()?;

        log::debug!("G2DConverter created with version {:?}", g2d.version());
        Ok(Self { g2d })
    }

    /// Returns the G2D library version as defined by _G2D_VERSION in the shared
    /// library.
    pub fn version(&self) -> g2d_sys::Version {
        self.g2d.version()
    }

    fn convert_(
        &mut self,
        src: &TensorImage,
        dst: &mut TensorImage,
        rotation: Rotation,
        flip: Flip,
        crop: Crop,
    ) -> Result<()> {
        let mut src_surface: G2DSurface = src.try_into()?;
        let mut dst_surface: G2DSurface = dst.try_into()?;

        src_surface.rot = match flip {
            Flip::None => g2d_sys::g2d_rotation_G2D_ROTATION_0,
            Flip::Vertical => g2d_sys::g2d_rotation_G2D_FLIP_V,
            Flip::Horizontal => g2d_sys::g2d_rotation_G2D_FLIP_H,
        };

        dst_surface.rot = match rotation {
            Rotation::None => g2d_sys::g2d_rotation_G2D_ROTATION_0,
            Rotation::Clockwise90 => g2d_sys::g2d_rotation_G2D_ROTATION_90,
            Rotation::Rotate180 => g2d_sys::g2d_rotation_G2D_ROTATION_180,
            Rotation::CounterClockwise90 => g2d_sys::g2d_rotation_G2D_ROTATION_270,
        };

        if let Some(crop_rect) = crop.src_rect {
            src_surface.left = crop_rect.left as i32;
            src_surface.top = crop_rect.top as i32;
            src_surface.right = (crop_rect.left + crop_rect.width) as i32;
            src_surface.bottom = (crop_rect.top + crop_rect.height) as i32;
        }

        // Clear the destination with the letterbox color before blitting the
        // image into the sub-region.
        //
        // g2d_clear does not support 3-byte-per-pixel formats (RGB888, BGR888).
        // For those formats, fall back to CPU fill after the blit.
        let needs_clear = crop.dst_color.is_some()
            && crop.dst_rect.is_some_and(|dst_rect| {
                dst_rect.left != 0
                    || dst_rect.top != 0
                    || dst_rect.width != dst.width()
                    || dst_rect.height != dst.height()
            });

        if needs_clear && dst.fourcc != RGB {
            if let Some(dst_color) = crop.dst_color {
                let start = Instant::now();
                self.g2d.clear(&mut dst_surface, dst_color)?;
                log::trace!("g2d clear takes {:?}", start.elapsed());
            }
        }

        if let Some(crop_rect) = crop.dst_rect {
            dst_surface.planes[0] += ((crop_rect.top * dst_surface.width as usize + crop_rect.left)
                * dst.channels()) as u64;

            dst_surface.right = crop_rect.width as i32;
            dst_surface.bottom = crop_rect.height as i32;
            dst_surface.width = crop_rect.width as i32;
            dst_surface.height = crop_rect.height as i32;
        }

        log::trace!("Blitting from {src_surface:?} to {dst_surface:?}");
        self.g2d.blit(&src_surface, &dst_surface)?;
        self.g2d.finish()?;

        // CPU fallback for RGB888 (unsupported by g2d_clear)
        if needs_clear && dst.fourcc == RGB {
            if let (Some(dst_color), Some(dst_rect)) = (crop.dst_color, crop.dst_rect) {
                let start = Instant::now();
                CPUProcessor::fill_image_outside_crop(dst, dst_color, dst_rect)?;
                log::trace!("cpu fill takes {:?}", start.elapsed());
            }
        }

        Ok(())
    }
}

impl ImageProcessorTrait for G2DProcessor {
    /// Converts the source image to the destination image using G2D.
    ///
    /// # Arguments
    ///
    /// * `dst` - The destination image to be converted to.
    /// * `src` - The source image to convert from.
    /// * `rotation` - The rotation to apply to the destination image (after
    ///   crop if specified).
    /// * `crop` - An optional rectangle specifying the area to crop from the
    ///   source image.
    ///
    /// # Returns
    ///
    /// A `Result` indicating success or failure of the conversion.
    fn convert(
        &mut self,
        src: &TensorImage,
        dst: &mut TensorImage,
        rotation: Rotation,
        flip: Flip,
        crop: Crop,
    ) -> Result<()> {
        crop.check_crop(src, dst)?;
        match (src.fourcc(), dst.fourcc()) {
            (RGBA, RGBA) => {}
            (RGBA, YUYV) => {}
            (RGBA, RGB) => {}
            (YUYV, RGBA) => {}
            (YUYV, YUYV) => {}
            (YUYV, RGB) => {}
            (NV12, RGBA) => {}
            (NV12, YUYV) => {}
            (NV12, RGB) => {}
            (s, d) => {
                return Err(Error::NotSupported(format!(
                    "G2D does not support {} to {} conversion",
                    s.display(),
                    d.display()
                )));
            }
        }
        self.convert_(src, dst, rotation, flip, crop)
    }

    fn convert_ref(
        &mut self,
        src: &TensorImage,
        dst: &mut TensorImageRef<'_>,
        rotation: Rotation,
        flip: Flip,
        crop: Crop,
    ) -> Result<()> {
        // G2D doesn't support PLANAR_RGB output, delegate to CPU
        let mut cpu = CPUProcessor::new();
        cpu.convert_ref(src, dst, rotation, flip, crop)
    }

    #[cfg(feature = "decoder")]
    fn render_to_image(
        &mut self,
        _dst: &mut TensorImage,
        _detect: &[crate::DetectBox],
        _segmentation: &[crate::Segmentation],
    ) -> Result<()> {
        Err(Error::NotImplemented(
            "G2D does not support rendering detection or segmentation overlays".to_string(),
        ))
    }

    #[cfg(feature = "decoder")]
    fn render_from_protos(
        &mut self,
        _dst: &mut TensorImage,
        _detect: &[crate::DetectBox],
        _proto_data: &crate::ProtoData,
    ) -> Result<()> {
        Err(Error::NotImplemented(
            "G2D does not support rendering detection or segmentation overlays".to_string(),
        ))
    }

    #[cfg(feature = "decoder")]
    fn render_masks_from_protos(
        &mut self,
        _detect: &[crate::DetectBox],
        _proto_data: crate::ProtoData,
        _output_width: usize,
        _output_height: usize,
    ) -> Result<Vec<crate::MaskResult>> {
        Err(Error::NotImplemented(
            "G2D does not support rendering per-instance masks".to_string(),
        ))
    }

    #[cfg(feature = "decoder")]
    fn set_class_colors(&mut self, _: &[[u8; 4]]) -> Result<()> {
        Err(Error::NotImplemented(
            "G2D does not support setting colors for rendering detection or segmentation overlays"
                .to_string(),
        ))
    }
}

impl TryFrom<&TensorImage> for G2DSurface {
    type Error = Error;

    fn try_from(img: &TensorImage) -> Result<Self, Self::Error> {
        let phys: G2DPhysical = match img.tensor() {
            Tensor::Dma(t) => t.as_raw_fd(),
            _ => {
                return Err(Error::NotImplemented(
                    "g2d only supports Dma memory".to_string(),
                ));
            }
        }
        .try_into()?;

        // NV12 is a two-plane format: Y plane followed by interleaved UV plane
        // planes[0] = Y plane start, planes[1] = UV plane start (Y size = width *
        // height)
        let base_addr = phys.address();
        let planes = if img.fourcc() == NV12 {
            let uv_offset = (img.width() * img.height()) as u64;
            [base_addr, base_addr + uv_offset, 0]
        } else {
            [base_addr, 0, 0]
        };

        Ok(Self {
            planes,
            format: G2DFormat::try_from(img.fourcc())?.format(),
            left: 0,
            top: 0,
            right: img.width() as i32,
            bottom: img.height() as i32,
            stride: img.width() as i32,
            width: img.width() as i32,
            height: img.height() as i32,
            blendfunc: 0,
            clrcolor: 0,
            rot: 0,
            global_alpha: 0,
        })
    }
}

impl TryFrom<&mut TensorImage> for G2DSurface {
    type Error = Error;

    fn try_from(img: &mut TensorImage) -> Result<Self, Self::Error> {
        let phys: G2DPhysical = match img.tensor() {
            Tensor::Dma(t) => t.as_raw_fd(),
            _ => {
                return Err(Error::NotImplemented(
                    "g2d only supports Dma memory".to_string(),
                ));
            }
        }
        .try_into()?;

        // NV12 is a two-plane format: Y plane followed by interleaved UV plane
        let base_addr = phys.address();
        let planes = if img.fourcc() == NV12 {
            let uv_offset = (img.width() * img.height()) as u64;
            [base_addr, base_addr + uv_offset, 0]
        } else {
            [base_addr, 0, 0]
        };

        Ok(Self {
            planes,
            format: G2DFormat::try_from(img.fourcc())?.format(),
            left: 0,
            top: 0,
            right: img.width() as i32,
            bottom: img.height() as i32,
            stride: img.width() as i32,
            width: img.width() as i32,
            height: img.height() as i32,
            blendfunc: 0,
            clrcolor: 0,
            rot: 0,
            global_alpha: 0,
        })
    }
}

#[cfg(feature = "g2d_test_formats")]
#[cfg(test)]
mod g2d_tests {
    use super::*;
    use crate::{
        CPUProcessor, Flip, G2DProcessor, ImageProcessorTrait, Rect, Rotation, TensorImage, GREY,
        NV12, RGB, RGBA, YUYV,
    };
    use edgefirst_tensor::{is_dma_available, TensorMapTrait, TensorMemory, TensorTrait};
    use four_char_code::FourCharCode;
    use image::buffer::ConvertBuffer;

    #[test]
    #[cfg(target_os = "linux")]
    fn test_g2d_formats_no_resize() {
        for i in [RGBA, YUYV, RGB, GREY, NV12] {
            for o in [RGBA, YUYV, RGB, GREY] {
                let res = test_g2d_format_no_resize_(i, o);
                if let Err(e) = res {
                    println!("{} to {} failed: {e:?}", i.display(), o.display());
                } else {
                    println!("{} to {} success", i.display(), o.display());
                }
            }
        }
    }

    fn test_g2d_format_no_resize_(
        g2d_in_fmt: FourCharCode,
        g2d_out_fmt: FourCharCode,
    ) -> Result<(), crate::Error> {
        let dst_width = 1280;
        let dst_height = 720;
        let file = include_bytes!("../../../testdata/zidane.jpg").to_vec();
        let src = TensorImage::load_jpeg(&file, Some(RGB), None)?;

        // Create DMA buffer for G2D input
        let mut src2 = TensorImage::new(1280, 720, g2d_in_fmt, Some(TensorMemory::Dma))?;

        let mut cpu_converter = CPUProcessor::new();

        // For NV12 input, load from file since CPU doesn't support RGB→NV12
        if g2d_in_fmt == NV12 {
            let nv12_bytes = include_bytes!("../../../testdata/zidane.nv12");
            src2.tensor()
                .map()?
                .as_mut_slice()
                .copy_from_slice(nv12_bytes);
        } else {
            cpu_converter.convert(&src, &mut src2, Rotation::None, Flip::None, Crop::no_crop())?;
        }

        let mut g2d_dst =
            TensorImage::new(dst_width, dst_height, g2d_out_fmt, Some(TensorMemory::Dma))?;
        let mut g2d_converter = G2DProcessor::new()?;
        g2d_converter.convert_(
            &src2,
            &mut g2d_dst,
            Rotation::None,
            Flip::None,
            Crop::no_crop(),
        )?;

        let mut cpu_dst = TensorImage::new(dst_width, dst_height, RGB, None)?;
        cpu_converter.convert(
            &g2d_dst,
            &mut cpu_dst,
            Rotation::None,
            Flip::None,
            Crop::no_crop(),
        )?;

        compare_images(
            &src,
            &cpu_dst,
            0.98,
            &format!("{}_to_{}", g2d_in_fmt.display(), g2d_out_fmt.display()),
        )
    }

    #[test]
    #[cfg(target_os = "linux")]
    fn test_g2d_formats_with_resize() {
        for i in [RGBA, YUYV, RGB, GREY, NV12] {
            for o in [RGBA, YUYV, RGB, GREY] {
                let res = test_g2d_format_with_resize_(i, o);
                if let Err(e) = res {
                    println!("{} to {} failed: {e:?}", i.display(), o.display());
                } else {
                    println!("{} to {} success", i.display(), o.display());
                }
            }
        }
    }

    #[test]
    #[cfg(target_os = "linux")]
    fn test_g2d_formats_with_resize_dst_crop() {
        for i in [RGBA, YUYV, RGB, GREY, NV12] {
            for o in [RGBA, YUYV, RGB, GREY] {
                let res = test_g2d_format_with_resize_dst_crop(i, o);
                if let Err(e) = res {
                    println!("{} to {} failed: {e:?}", i.display(), o.display());
                } else {
                    println!("{} to {} success", i.display(), o.display());
                }
            }
        }
    }

    fn test_g2d_format_with_resize_(
        g2d_in_fmt: FourCharCode,
        g2d_out_fmt: FourCharCode,
    ) -> Result<(), crate::Error> {
        let dst_width = 600;
        let dst_height = 400;
        let file = include_bytes!("../../../testdata/zidane.jpg").to_vec();
        let src = TensorImage::load_jpeg(&file, Some(RGB), None)?;

        let mut cpu_converter = CPUProcessor::new();

        let mut reference = TensorImage::new(dst_width, dst_height, RGB, Some(TensorMemory::Dma))?;
        cpu_converter.convert(
            &src,
            &mut reference,
            Rotation::None,
            Flip::None,
            Crop::no_crop(),
        )?;

        // Create DMA buffer for G2D input
        let mut src2 = TensorImage::new(1280, 720, g2d_in_fmt, Some(TensorMemory::Dma))?;

        // For NV12 input, load from file since CPU doesn't support RGB→NV12
        if g2d_in_fmt == NV12 {
            let nv12_bytes = include_bytes!("../../../testdata/zidane.nv12");
            src2.tensor()
                .map()?
                .as_mut_slice()
                .copy_from_slice(nv12_bytes);
        } else {
            cpu_converter.convert(&src, &mut src2, Rotation::None, Flip::None, Crop::no_crop())?;
        }

        let mut g2d_dst =
            TensorImage::new(dst_width, dst_height, g2d_out_fmt, Some(TensorMemory::Dma))?;
        let mut g2d_converter = G2DProcessor::new()?;
        g2d_converter.convert_(
            &src2,
            &mut g2d_dst,
            Rotation::None,
            Flip::None,
            Crop::no_crop(),
        )?;

        let mut cpu_dst = TensorImage::new(dst_width, dst_height, RGB, None)?;
        cpu_converter.convert(
            &g2d_dst,
            &mut cpu_dst,
            Rotation::None,
            Flip::None,
            Crop::no_crop(),
        )?;

        compare_images(
            &reference,
            &cpu_dst,
            0.98,
            &format!(
                "{}_to_{}_resized",
                g2d_in_fmt.display(),
                g2d_out_fmt.display()
            ),
        )
    }

    fn test_g2d_format_with_resize_dst_crop(
        g2d_in_fmt: FourCharCode,
        g2d_out_fmt: FourCharCode,
    ) -> Result<(), crate::Error> {
        let dst_width = 600;
        let dst_height = 400;
        let crop = Crop {
            src_rect: None,
            dst_rect: Some(Rect {
                top: 100,
                left: 100,
                height: 100,
                width: 200,
            }),
            dst_color: None,
        };
        let file = include_bytes!("../../../testdata/zidane.jpg").to_vec();
        let src = TensorImage::load_jpeg(&file, Some(RGB), None)?;

        let mut cpu_converter = CPUProcessor::new();

        let mut reference = TensorImage::new(dst_width, dst_height, RGB, Some(TensorMemory::Dma))?;
        reference.tensor.map().unwrap().as_mut_slice().fill(128);
        cpu_converter.convert(&src, &mut reference, Rotation::None, Flip::None, crop)?;

        // Create DMA buffer for G2D input
        let mut src2 = TensorImage::new(1280, 720, g2d_in_fmt, Some(TensorMemory::Dma))?;

        // For NV12 input, load from file since CPU doesn't support RGB→NV12
        if g2d_in_fmt == NV12 {
            let nv12_bytes = include_bytes!("../../../testdata/zidane.nv12");
            src2.tensor()
                .map()?
                .as_mut_slice()
                .copy_from_slice(nv12_bytes);
        } else {
            cpu_converter.convert(&src, &mut src2, Rotation::None, Flip::None, Crop::no_crop())?;
        }

        let mut g2d_dst =
            TensorImage::new(dst_width, dst_height, g2d_out_fmt, Some(TensorMemory::Dma))?;
        g2d_dst.tensor.map().unwrap().as_mut_slice().fill(128);
        let mut g2d_converter = G2DProcessor::new()?;
        g2d_converter.convert_(&src2, &mut g2d_dst, Rotation::None, Flip::None, crop)?;

        let mut cpu_dst = TensorImage::new(dst_width, dst_height, RGB, None)?;
        cpu_converter.convert(
            &g2d_dst,
            &mut cpu_dst,
            Rotation::None,
            Flip::None,
            Crop::no_crop(),
        )?;

        compare_images(
            &reference,
            &cpu_dst,
            0.98,
            &format!(
                "{}_to_{}_resized_dst_crop",
                g2d_in_fmt.display(),
                g2d_out_fmt.display()
            ),
        )
    }

    fn compare_images(
        img1: &TensorImage,
        img2: &TensorImage,
        threshold: f64,
        name: &str,
    ) -> Result<(), crate::Error> {
        assert_eq!(img1.height(), img2.height(), "Heights differ");
        assert_eq!(img1.width(), img2.width(), "Widths differ");
        assert_eq!(img1.fourcc(), img2.fourcc(), "FourCC differ");
        assert!(
            matches!(img1.fourcc(), RGB | RGBA),
            "FourCC must be RGB or RGBA for comparison"
        );
        let image1 = match img1.fourcc() {
            RGB => image::RgbImage::from_vec(
                img1.width() as u32,
                img1.height() as u32,
                img1.tensor().map().unwrap().to_vec(),
            )
            .unwrap(),
            RGBA => image::RgbaImage::from_vec(
                img1.width() as u32,
                img1.height() as u32,
                img1.tensor().map().unwrap().to_vec(),
            )
            .unwrap()
            .convert(),

            _ => unreachable!(),
        };

        let image2 = match img2.fourcc() {
            RGB => image::RgbImage::from_vec(
                img2.width() as u32,
                img2.height() as u32,
                img2.tensor().map().unwrap().to_vec(),
            )
            .unwrap(),
            RGBA => image::RgbaImage::from_vec(
                img2.width() as u32,
                img2.height() as u32,
                img2.tensor().map().unwrap().to_vec(),
            )
            .unwrap()
            .convert(),

            _ => unreachable!(),
        };

        let similarity = image_compare::rgb_similarity_structure(
            &image_compare::Algorithm::RootMeanSquared,
            &image1,
            &image2,
        )
        .expect("Image Comparison failed");

        if similarity.score < threshold {
            image1.save(format!("{name}_1.png")).unwrap();
            image2.save(format!("{name}_2.png")).unwrap();
            // similarity
            //     .image
            //     .to_color_map()
            //     .save(format!("{name}.png"))
            //     .unwrap();
            return Err(Error::Internal(format!(
                "{name}: converted image and target image have similarity score too low: {} < {}",
                similarity.score, threshold
            )));
        }
        Ok(())
    }

    // =========================================================================
    // NV12 Reference Validation Tests
    // These tests compare G2D NV12 conversions against ffmpeg-generated references
    // =========================================================================

    fn load_raw_image(
        width: usize,
        height: usize,
        fourcc: FourCharCode,
        memory: Option<TensorMemory>,
        bytes: &[u8],
    ) -> Result<TensorImage, crate::Error> {
        let img = TensorImage::new(width, height, fourcc, memory)?;
        let mut map = img.tensor().map()?;
        map.as_mut_slice()[..bytes.len()].copy_from_slice(bytes);
        Ok(img)
    }

    /// Test G2D NV12→RGBA conversion against ffmpeg reference
    #[test]
    #[cfg(target_os = "linux")]
    fn test_g2d_nv12_to_rgba_reference() -> Result<(), crate::Error> {
        if !is_dma_available() {
            return Ok(());
        }
        // Load NV12 source
        let src = load_raw_image(
            1280,
            720,
            NV12,
            Some(TensorMemory::Dma),
            include_bytes!("../../../testdata/camera720p.nv12"),
        )?;

        // Load RGBA reference (ffmpeg-generated)
        let reference = load_raw_image(
            1280,
            720,
            RGBA,
            None,
            include_bytes!("../../../testdata/camera720p.rgba"),
        )?;

        // Convert using G2D
        let mut dst = TensorImage::new(1280, 720, RGBA, Some(TensorMemory::Dma))?;
        let mut g2d = G2DProcessor::new()?;
        g2d.convert_(&src, &mut dst, Rotation::None, Flip::None, Crop::no_crop())?;

        // Copy to CPU for comparison
        let cpu_dst = TensorImage::new(1280, 720, RGBA, None)?;
        cpu_dst
            .tensor()
            .map()?
            .as_mut_slice()
            .copy_from_slice(dst.tensor().map()?.as_slice());

        compare_images(&reference, &cpu_dst, 0.98, "g2d_nv12_to_rgba_reference")
    }

    /// Test G2D NV12→RGB conversion against ffmpeg reference
    #[test]
    #[cfg(target_os = "linux")]
    fn test_g2d_nv12_to_rgb_reference() -> Result<(), crate::Error> {
        if !is_dma_available() {
            return Ok(());
        }
        // Load NV12 source
        let src = load_raw_image(
            1280,
            720,
            NV12,
            Some(TensorMemory::Dma),
            include_bytes!("../../../testdata/camera720p.nv12"),
        )?;

        // Load RGB reference (ffmpeg-generated)
        let reference = load_raw_image(
            1280,
            720,
            RGB,
            None,
            include_bytes!("../../../testdata/camera720p.rgb"),
        )?;

        // Convert using G2D
        let mut dst = TensorImage::new(1280, 720, RGB, Some(TensorMemory::Dma))?;
        let mut g2d = G2DProcessor::new()?;
        g2d.convert_(&src, &mut dst, Rotation::None, Flip::None, Crop::no_crop())?;

        // Copy to CPU for comparison
        let cpu_dst = TensorImage::new(1280, 720, RGB, None)?;
        cpu_dst
            .tensor()
            .map()?
            .as_mut_slice()
            .copy_from_slice(dst.tensor().map()?.as_slice());

        compare_images(&reference, &cpu_dst, 0.98, "g2d_nv12_to_rgb_reference")
    }

    /// Test G2D YUYV→RGBA conversion against ffmpeg reference
    #[test]
    #[cfg(target_os = "linux")]
    fn test_g2d_yuyv_to_rgba_reference() -> Result<(), crate::Error> {
        if !is_dma_available() {
            return Ok(());
        }
        // Load YUYV source
        let src = load_raw_image(
            1280,
            720,
            YUYV,
            Some(TensorMemory::Dma),
            include_bytes!("../../../testdata/camera720p.yuyv"),
        )?;

        // Load RGBA reference (ffmpeg-generated)
        let reference = load_raw_image(
            1280,
            720,
            RGBA,
            None,
            include_bytes!("../../../testdata/camera720p.rgba"),
        )?;

        // Convert using G2D
        let mut dst = TensorImage::new(1280, 720, RGBA, Some(TensorMemory::Dma))?;
        let mut g2d = G2DProcessor::new()?;
        g2d.convert_(&src, &mut dst, Rotation::None, Flip::None, Crop::no_crop())?;

        // Copy to CPU for comparison
        let cpu_dst = TensorImage::new(1280, 720, RGBA, None)?;
        cpu_dst
            .tensor()
            .map()?
            .as_mut_slice()
            .copy_from_slice(dst.tensor().map()?.as_slice());

        compare_images(&reference, &cpu_dst, 0.98, "g2d_yuyv_to_rgba_reference")
    }

    /// Test G2D YUYV→RGB conversion against ffmpeg reference
    #[test]
    #[cfg(target_os = "linux")]
    fn test_g2d_yuyv_to_rgb_reference() -> Result<(), crate::Error> {
        if !is_dma_available() {
            return Ok(());
        }
        // Load YUYV source
        let src = load_raw_image(
            1280,
            720,
            YUYV,
            Some(TensorMemory::Dma),
            include_bytes!("../../../testdata/camera720p.yuyv"),
        )?;

        // Load RGB reference (ffmpeg-generated)
        let reference = load_raw_image(
            1280,
            720,
            RGB,
            None,
            include_bytes!("../../../testdata/camera720p.rgb"),
        )?;

        // Convert using G2D
        let mut dst = TensorImage::new(1280, 720, RGB, Some(TensorMemory::Dma))?;
        let mut g2d = G2DProcessor::new()?;
        g2d.convert_(&src, &mut dst, Rotation::None, Flip::None, Crop::no_crop())?;

        // Copy to CPU for comparison
        let cpu_dst = TensorImage::new(1280, 720, RGB, None)?;
        cpu_dst
            .tensor()
            .map()?
            .as_mut_slice()
            .copy_from_slice(dst.tensor().map()?.as_slice());

        compare_images(&reference, &cpu_dst, 0.98, "g2d_yuyv_to_rgb_reference")
    }
}