mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-09-27 14:30:27 +00:00
291 lines
8.7 KiB
Rust
291 lines
8.7 KiB
Rust
// Copyright (C) 2023 Matthew Waters <matthew@centricular.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License, v2.0.
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// If a copy of the MPL was not distributed with this file, You can obtain one at
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// <https://mozilla.org/MPL/2.0/>.
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//
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// SPDX-License-Identifier: MPL-2.0
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use cea708_types::{tables::*, Service};
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use gst::glib;
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use once_cell::sync::Lazy;
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use serde::{Deserialize, Serialize};
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use crate::cea608utils::TextStyle;
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static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
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gst::DebugCategory::new(
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"cea708utils",
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gst::DebugColorFlags::empty(),
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Some("CEA-708 Utilities"),
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)
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});
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#[derive(
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Serialize, Deserialize, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Copy, glib::Enum,
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)]
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#[repr(u32)]
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#[enum_type(name = "GstTtToCea708Mode")]
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pub enum Cea708Mode {
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PopOn,
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PaintOn,
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RollUp,
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}
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pub fn textstyle_foreground_color(style: TextStyle) -> cea708_types::tables::Color {
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let color = match style {
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TextStyle::Red => cea608_types::tables::Color::Red,
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TextStyle::Blue => cea608_types::tables::Color::Blue,
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TextStyle::Cyan => cea608_types::tables::Color::Cyan,
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TextStyle::White => cea608_types::tables::Color::White,
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TextStyle::Green => cea608_types::tables::Color::Green,
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TextStyle::Yellow => cea608_types::tables::Color::Yellow,
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TextStyle::Magenta => cea608_types::tables::Color::Magenta,
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TextStyle::ItalicWhite => cea608_types::tables::Color::White,
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};
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cea608_color_to_foreground_color(color)
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}
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pub fn cea608_color_to_foreground_color(
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color: cea608_types::tables::Color,
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) -> cea708_types::tables::Color {
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match color {
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cea608_types::tables::Color::Red => cea708_types::tables::Color {
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r: ColorValue::Full,
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g: ColorValue::None,
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b: ColorValue::None,
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},
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cea608_types::tables::Color::Green => cea708_types::tables::Color {
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r: ColorValue::None,
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g: ColorValue::Full,
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b: ColorValue::None,
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},
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cea608_types::tables::Color::Blue => cea708_types::tables::Color {
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r: ColorValue::None,
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g: ColorValue::None,
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b: ColorValue::Full,
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},
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cea608_types::tables::Color::Cyan => cea708_types::tables::Color {
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r: ColorValue::None,
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g: ColorValue::Full,
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b: ColorValue::Full,
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},
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cea608_types::tables::Color::Yellow => cea708_types::tables::Color {
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r: ColorValue::Full,
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g: ColorValue::Full,
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b: ColorValue::None,
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},
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cea608_types::tables::Color::Magenta => cea708_types::tables::Color {
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r: ColorValue::Full,
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g: ColorValue::None,
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b: ColorValue::Full,
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},
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cea608_types::tables::Color::White => cea708_types::tables::Color {
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r: ColorValue::Full,
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g: ColorValue::Full,
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b: ColorValue::Full,
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},
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}
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}
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pub fn textstyle_to_pen_color(style: TextStyle) -> SetPenColorArgs {
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let black = Color {
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r: ColorValue::None,
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g: ColorValue::None,
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b: ColorValue::None,
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};
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SetPenColorArgs {
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foreground_color: textstyle_foreground_color(style),
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foreground_opacity: Opacity::Solid,
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background_color: black,
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background_opacity: Opacity::Solid,
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edge_color: black,
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}
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}
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#[derive(Debug)]
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pub(crate) struct Cea708ServiceWriter {
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codes: Vec<Code>,
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service_no: u8,
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active_window: WindowBits,
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hidden_window: WindowBits,
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}
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impl Cea708ServiceWriter {
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pub fn new(service_no: u8) -> Self {
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Self {
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codes: vec![],
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service_no,
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active_window: WindowBits::ZERO,
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hidden_window: WindowBits::ONE,
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}
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}
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pub fn take_service(&mut self, available_bytes: usize) -> Option<Service> {
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if self.codes.is_empty() {
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return None;
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}
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gst::trace!(CAT, "New service block {}", self.service_no);
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let mut service = Service::new(self.service_no);
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let mut i = 0;
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for code in self.codes.iter() {
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if code.byte_len() > service.free_space() {
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gst::trace!(CAT, "service is full");
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break;
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}
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if service.len() + code.byte_len() > available_bytes {
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gst::trace!(CAT, "packet is full");
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break;
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}
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gst::trace!(CAT, "Adding code {code:?} to service");
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match service.push_code(code) {
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Ok(_) => i += 1,
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Err(_) => break,
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}
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}
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if i == 0 {
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return None;
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}
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self.codes = self.codes.split_off(i);
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Some(service)
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}
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pub fn popon_preamble(&mut self) {
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gst::trace!(CAT, "popon_preamble");
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let window = match self.hidden_window {
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// switch up the newly defined window
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WindowBits::ZERO => 0,
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WindowBits::ONE => 1,
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_ => unreachable!(),
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};
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let args = DefineWindowArgs::new(
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window,
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0,
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Anchor::BottomMiddle,
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false,
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70,
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105,
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14,
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31,
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true,
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true,
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false,
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1,
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1,
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);
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gst::trace!(CAT, "active window {:?}", self.active_window);
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let codes = [
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Code::DeleteWindows(!self.active_window),
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Code::DefineWindow(args),
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];
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self.push_codes(&codes)
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}
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pub fn clear_current_window(&mut self) {
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gst::trace!(CAT, "clear_current_window {:?}", self.active_window);
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self.push_codes(&[Code::ClearWindows(self.active_window)])
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}
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pub fn clear_hidden_window(&mut self) {
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gst::trace!(CAT, "clear_hidden_window");
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self.push_codes(&[Code::ClearWindows(self.hidden_window)])
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}
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pub fn end_of_caption(&mut self) {
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gst::trace!(CAT, "end_of_caption");
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self.push_codes(&[Code::ToggleWindows(self.active_window | self.hidden_window)]);
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std::mem::swap(&mut self.active_window, &mut self.hidden_window);
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gst::trace!(CAT, "active window {:?}", self.active_window);
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}
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pub fn paint_on_preamble(&mut self) {
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gst::trace!(CAT, "paint_on_preamble");
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let window = match self.active_window {
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WindowBits::ZERO => 0,
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WindowBits::ONE => 1,
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_ => unreachable!(),
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};
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self.push_codes(&[
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// FIXME: assumes positioning in a 16:9 ratio
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Code::DefineWindow(DefineWindowArgs::new(
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window,
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0,
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Anchor::BottomMiddle,
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false,
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70,
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105,
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14,
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31,
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true,
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true,
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true,
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1,
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1,
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)),
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])
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}
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pub fn rollup_preamble(&mut self, rollup_count: u8, base_row: u8) {
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let base_row = std::cmp::max(rollup_count, base_row);
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let anchor_vertical = (base_row as u32 * 100 / 14) as u8;
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gst::trace!(
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CAT,
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"rollup_preamble base {base_row} count {rollup_count}, anchor-v {anchor_vertical}"
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);
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let codes = [
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Code::DeleteWindows(!WindowBits::ZERO),
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Code::DefineWindow(DefineWindowArgs::new(
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0,
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0,
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Anchor::BottomMiddle,
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true,
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anchor_vertical,
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50,
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rollup_count - 1,
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31,
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true,
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true,
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true,
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1,
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1,
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)),
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Code::SetPenLocation(SetPenLocationArgs::new(rollup_count - 1, 0)),
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];
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self.active_window = WindowBits::ZERO;
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self.hidden_window = WindowBits::ONE;
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self.push_codes(&codes)
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}
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pub fn write_char(&mut self, c: char) {
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if let Some(code) = Code::from_char(c) {
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self.push_codes(&[code])
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}
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}
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pub fn push_codes(&mut self, codes: &[Code]) {
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gst::log!(CAT, "pushing codes: {codes:?}");
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self.codes.extend(codes.iter().cloned());
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}
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pub fn etx(&mut self) {
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self.push_codes(&[Code::ETX])
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}
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pub fn carriage_return(&mut self) {
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self.push_codes(&[Code::CR])
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}
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pub fn set_pen_attributes(&mut self, args: SetPenAttributesArgs) {
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self.push_codes(&[Code::SetPenAttributes(args)])
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}
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pub fn set_pen_location(&mut self, args: SetPenLocationArgs) {
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self.push_codes(&[Code::SetPenLocation(args)])
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}
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pub fn set_pen_color(&mut self, args: SetPenColorArgs) {
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self.push_codes(&[Code::SetPenColor(args)])
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}
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}
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