1 files changed, 116 insertions, 0 deletions
diff --git a/devices/src/virtio/video/format.rs b/devices/src/virtio/video/format.rs
new file mode 100644
index 0000000..fc2c441
--- /dev/null
+++ b/devices/src/virtio/video/format.rs
@@ -0,0 +1,116 @@
+// Copyright 2020 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Data structures that represent video format information in virtio video devices.
+
+use std::convert::{From, Into, TryFrom};
+use std::io;
+
+use data_model::Le32;
+use enumn::N;
+use sys_util::error;
+
+use crate::virtio::video::command::ReadCmdError;
+use crate::virtio::video::protocol::*;
+use crate::virtio::video::response::Response;
+use crate::virtio::Writer;
+
+#[derive(PartialEq, Eq, PartialOrd, Ord, N, Clone, Copy, Debug)]
+#[repr(u32)]
+pub enum Profile {
+    VP8Profile0 = VIRTIO_VIDEO_PROFILE_VP8_PROFILE0,
+    VP9Profile0 = VIRTIO_VIDEO_PROFILE_VP9_PROFILE0,
+    H264Baseline = VIRTIO_VIDEO_PROFILE_H264_BASELINE,
+}
+impl_try_from_le32_for_enumn!(Profile, "profile");
+
+#[derive(PartialEq, Eq, PartialOrd, Ord, N, Clone, Copy, Debug)]
+#[repr(u32)]
+pub enum Level {
+    H264_1_0 = VIRTIO_VIDEO_LEVEL_H264_1_0,
+}
+impl_try_from_le32_for_enumn!(Level, "level");
+
+#[derive(PartialEq, Eq, PartialOrd, Ord, N, Clone, Copy, Debug)]
+#[repr(u32)]
+pub enum Format {
+    // Raw formats
+    NV12 = VIRTIO_VIDEO_FORMAT_NV12,
+    YUV420 = VIRTIO_VIDEO_FORMAT_YUV420,
+
+    // Bitstream formats
+    H264 = VIRTIO_VIDEO_FORMAT_H264,
+    VP8 = VIRTIO_VIDEO_FORMAT_VP8,
+    VP9 = VIRTIO_VIDEO_FORMAT_VP9,
+}
+impl_try_from_le32_for_enumn!(Format, "format");
+
+#[derive(Debug, Default, Copy, Clone)]
+pub struct Crop {
+    pub left: u32,
+    pub top: u32,
+    pub width: u32,
+    pub height: u32,
+}
+impl_from_for_interconvertible_structs!(virtio_video_crop, Crop, left, top, width, height);
+
+#[derive(Debug, Default, Clone, Copy)]
+pub struct PlaneFormat {
+    pub plane_size: u32,
+    pub stride: u32,
+}
+impl_from_for_interconvertible_structs!(virtio_video_plane_format, PlaneFormat, plane_size, stride);
+
+#[derive(Debug, Default, Clone, Copy)]
+pub struct FormatRange {
+    pub min: u32,
+    pub max: u32,
+    pub step: u32,
+}
+impl_from_for_interconvertible_structs!(virtio_video_format_range, FormatRange, min, max, step);
+
+#[derive(Debug, Default, Clone)]
+pub struct FrameFormat {
+    pub width: FormatRange,
+    pub height: FormatRange,
+    pub bitrates: Vec<FormatRange>,
+}
+
+impl Response for FrameFormat {
+    fn write(&self, w: &mut Writer) -> Result<(), io::Error> {
+        w.write_obj(virtio_video_format_frame {
+            width: self.width.into(),
+            height: self.height.into(),
+            num_rates: Le32::from(self.bitrates.len() as u32),
+            ..Default::default()
+        })?;
+        w.write_iter(
+            self.bitrates
+                .iter()
+                .map(|r| Into::<virtio_video_format_range>::into(*r)),
+        )
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct FormatDesc {
+    pub mask: u64,
+    pub format: Format,
+    pub frame_formats: Vec<FrameFormat>,
+}
+
+impl Response for FormatDesc {
+    fn write(&self, w: &mut Writer) -> Result<(), io::Error> {
+        w.write_obj(virtio_video_format_desc {
+            mask: self.mask.into(),
+            format: Le32::from(self.format as u32),
+            // ChromeOS only supports single-buffer mode.
+            planes_layout: Le32::from(VIRTIO_VIDEO_PLANES_LAYOUT_SINGLE_BUFFER),
+            // No alignment is required on boards that we currently support.
+            plane_align: Le32::from(0),
+            num_frames: Le32::from(self.frame_formats.len() as u32),
+        })?;
+        self.frame_formats.iter().map(|ff| ff.write(w)).collect()
+    }
+}