encoder/v4l2: Add VP8 stateful encoder

This commit adds VP8 stateful encoder with additional necessary v4l2
controls.

src/backend/v4l2/controls.rs

@@ -458,6 +458,28 @@ impl From<VideoHEVCProfile> for i32 {
     }
 }
 
+/// Safe wrapper over [`v4l2r::bindings::V4L2_CID_MPEG_VIDEO_VP8_PROFILE`]
+#[allow(unused)]
+#[repr(i32)]
+#[derive(N, Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub enum VideoVP8Profile {
+    Profile0 = v4l2r::bindings::v4l2_mpeg_video_vp8_profile_V4L2_MPEG_VIDEO_VP8_PROFILE_0 as i32,
+    Profile1 = v4l2r::bindings::v4l2_mpeg_video_vp8_profile_V4L2_MPEG_VIDEO_VP8_PROFILE_1 as i32,
+    Profile2 = v4l2r::bindings::v4l2_mpeg_video_vp8_profile_V4L2_MPEG_VIDEO_VP8_PROFILE_2 as i32,
+    Profile3 = v4l2r::bindings::v4l2_mpeg_video_vp8_profile_V4L2_MPEG_VIDEO_VP8_PROFILE_3 as i32,
+}
+
+impl ExtControlTrait for VideoVP8Profile {
+    const ID: u32 = v4l2r::bindings::V4L2_CID_MPEG_VIDEO_VP8_PROFILE;
+    type PAYLOAD = i32;
+}
+
+impl From<VideoVP8Profile> for i32 {
+    fn from(value: VideoVP8Profile) -> Self {
+        value as i32
+    }
+}
+
 /// Safe wrapper over [`v4l2r::bindings::V4L2_CID_MPEG_VIDEO_VP9_PROFILE`]
 #[allow(unused)]
 #[repr(i32)]

src/encoder.rs

@@ -7,6 +7,7 @@ use thiserror::Error;
 pub mod av1;
 pub mod h264;
 pub mod h265;
+pub mod vp8;
 pub mod vp9;
 
 pub mod stateful;

src/encoder/stateful.rs

@@ -16,6 +16,7 @@ use crate::encoder::VideoEncoder;
 
 pub mod h264;
 pub mod h265;
+pub mod vp8;
 pub mod vp9;
 
 #[derive(Debug, Error)]

src/encoder/stateful/vp8.rs

@@ -0,0 +1,6 @@
+// Copyright 2024 The ChromiumOS Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#[cfg(feature = "v4l2")]
+pub mod v4l2;