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// 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()
}
}
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