mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-10-31 22:58:51 +00:00
cea608tocea708: create service's as requested
Allows the ability to push multiple Service blocks of the same service into the same packet if necessary (unlikely but possible). Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1398>
This commit is contained in:
parent
ded4261971
commit
5739a3d86f
2 changed files with 71 additions and 86 deletions
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@ -101,11 +101,11 @@ impl Cea708ServiceState {
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0
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};
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match cea608_mode {
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Cea608Mode::PopOn => self.writer.popon_preamble().unwrap(),
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Cea608Mode::PaintOn => self.writer.paint_on_preamble().unwrap(),
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Cea608Mode::RollUp2 => self.writer.rollup_preamble(2, base_row).unwrap(),
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Cea608Mode::RollUp3 => self.writer.rollup_preamble(3, base_row).unwrap(),
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Cea608Mode::RollUp4 => self.writer.rollup_preamble(4, base_row).unwrap(),
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Cea608Mode::PopOn => self.writer.popon_preamble(),
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Cea608Mode::PaintOn => self.writer.paint_on_preamble(),
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Cea608Mode::RollUp2 => self.writer.rollup_preamble(2, base_row),
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Cea608Mode::RollUp3 => self.writer.rollup_preamble(3, base_row),
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Cea608Mode::RollUp4 => self.writer.rollup_preamble(4, base_row),
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};
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// we have redefined then window so all the attributes have been reset
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self.pen_location.row = new_row;
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@ -117,20 +117,20 @@ impl Cea708ServiceState {
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fn handle_text(&mut self, text: Cea608Text) {
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if text.code_space == CodeSpace::WestEU {
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self.writer.push_codes(&[Code::BS]).unwrap();
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self.writer.push_codes(&[Code::BS]);
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}
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if let Some(c) = text.char1 {
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if self.pen_location.column > 31 {
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self.writer.push_codes(&[Code::BS]).unwrap();
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self.writer.push_codes(&[Code::BS]);
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}
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self.writer.write_char(c).unwrap();
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self.writer.write_char(c);
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self.pen_location.column = std::cmp::min(self.pen_location.column + 1, 32);
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}
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if let Some(c) = text.char2 {
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if self.pen_location.column > 31 {
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self.writer.push_codes(&[Code::BS]).unwrap();
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self.writer.push_codes(&[Code::BS]);
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}
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self.writer.write_char(c).unwrap();
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self.writer.write_char(c);
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self.pen_location.column = std::cmp::min(self.pen_location.column + 1, 32);
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}
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}
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@ -150,7 +150,7 @@ impl Cea708ServiceState {
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}
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if need_pen_location {
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self.writer.set_pen_location(self.pen_location).unwrap();
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self.writer.set_pen_location(self.pen_location);
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}
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let mut need_pen_attributes = false;
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@ -165,20 +165,20 @@ impl Cea708ServiceState {
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}
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if need_pen_attributes {
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self.writer.set_pen_attributes(self.pen_attributes).unwrap();
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self.writer.set_pen_attributes(self.pen_attributes);
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}
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if self.pen_color.foreground_color != textstyle_foreground_color(preamble.style) {
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self.pen_color.foreground_color = textstyle_foreground_color(preamble.style);
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self.writer.set_pen_color(self.pen_color).unwrap();
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self.writer.set_pen_color(self.pen_color);
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}
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}
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fn handle_midrowchange(&mut self, midrowchange: MidRowChange) {
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self.writer.write_char(' ').unwrap();
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self.writer.write_char(' ');
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if self.pen_color.foreground_color != textstyle_foreground_color(midrowchange.style) {
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self.pen_color.foreground_color = textstyle_foreground_color(midrowchange.style);
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self.writer.set_pen_color(self.pen_color).unwrap();
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self.writer.set_pen_color(self.pen_color);
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}
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let mut need_pen_attributes = false;
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@ -214,7 +214,7 @@ impl Cea708State {
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self.packet_counter &= 0x3;
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for state in self.service_state.iter_mut() {
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if let Some(service) = state.writer.take_service() {
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while let Some(service) = state.writer.take_service(packet.free_space()) {
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if let Err(e) = packet.push_service(service.clone()) {
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gst::warning!(
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CAT,
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@ -307,14 +307,8 @@ impl State {
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{
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// https://www.law.cornell.edu/cfr/text/47/79.101 (f)(1)(x)
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gst::trace!(CAT, "change to rollup from pop/paint-on");
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self.cea708.service_state[idx]
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.writer
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.clear_hidden_window()
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.unwrap();
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self.cea708.service_state[idx]
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.writer
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.clear_current_window()
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.unwrap();
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self.cea708.service_state[idx].writer.clear_hidden_window();
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self.cea708.service_state[idx].writer.clear_current_window();
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self.cea608.service[idx].base_row = 15;
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}
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if old_mode.is_rollup() && cea608_mode.is_rollup() {
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@ -331,8 +325,7 @@ impl State {
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for _ in new_count..old_count {
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self.cea708.service_state[idx]
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.writer
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.push_codes(&[Code::CR])
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.unwrap();
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.push_codes(&[Code::CR]);
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}
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}
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}
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@ -371,8 +364,8 @@ impl State {
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}
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Cea608::EndOfCaption(chan) => {
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let state = self.service_state_from_608_field_channel(field, chan);
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state.writer.end_of_caption().unwrap();
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state.writer.etx().unwrap();
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state.writer.end_of_caption();
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state.writer.etx();
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}
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Cea608::Preamble(mut preamble) => {
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let idx = self.field_channel_to_index(field, preamble.chan);
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@ -394,8 +387,7 @@ impl State {
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if old_base_row != preamble.row as u8 {
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state
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.writer
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.rollup_preamble(rollup_count, preamble.row as u8)
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.unwrap();
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.rollup_preamble(rollup_count, preamble.row as u8);
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}
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state.pen_location.row = rollup_count - 1;
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preamble.row = rollup_count as i32 - 1;
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@ -411,10 +403,7 @@ impl State {
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let state = self.service_state_from_608_field_channel(field, chan);
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// TODO: handle removing a midrowchange
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state.pen_location.column = std::cmp::max(state.pen_location.column - 1, 0);
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state
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.writer
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.push_codes(&[cea708_types::tables::Code::BS])
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.unwrap();
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state.writer.push_codes(&[cea708_types::tables::Code::BS]);
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}
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Cea608::CarriageReturn(chan) => {
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if let Some(mode) =
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@ -428,11 +417,11 @@ impl State {
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}
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Cea608::EraseDisplay(chan) => {
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let state = self.service_state_from_608_field_channel(field, chan);
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state.writer.clear_current_window().unwrap();
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state.writer.clear_current_window();
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}
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Cea608::EraseNonDisplay(chan) => {
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let state = self.service_state_from_608_field_channel(field, chan);
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state.writer.clear_hidden_window().unwrap();
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state.writer.clear_hidden_window();
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}
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Cea608::TabOffset(chan, count) => {
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let state = self.service_state_from_608_field_channel(field, chan);
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@ -453,8 +442,7 @@ impl State {
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// and we need to send ETX
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self.cea708.service_state[idx]
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.writer
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.push_codes(&[cea708_types::tables::Code::ETX])
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.unwrap();
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.push_codes(&[cea708_types::tables::Code::ETX]);
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}
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}
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}
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@ -88,14 +88,8 @@ pub fn textstyle_to_pen_color(style: TextStyle) -> SetPenColorArgs {
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}
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}
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#[derive(Debug)]
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pub enum WriteError {
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// returns the number of characters/bytes written
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WouldOverflow(usize),
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}
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pub(crate) struct Cea708ServiceWriter {
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service: Option<Service>,
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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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@ -104,24 +98,44 @@ pub(crate) struct Cea708ServiceWriter {
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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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service: None,
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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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fn ensure_service(&mut self) {
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if self.service.is_none() {
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self.service = Some(Service::new(self.service_no));
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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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pub fn take_service(&mut self) -> Option<Service> {
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self.service.take()
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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) -> Result<usize, WriteError> {
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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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@ -152,26 +166,24 @@ impl Cea708ServiceWriter {
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self.push_codes(&codes)
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}
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pub fn clear_current_window(&mut self) -> Result<usize, WriteError> {
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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) -> Result<usize, WriteError> {
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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) -> Result<usize, WriteError> {
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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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let ret =
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self.push_codes(&[Code::ToggleWindows(self.active_window | self.hidden_window)])?;
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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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Ok(ret)
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}
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pub fn paint_on_preamble(&mut self) -> Result<usize, WriteError> {
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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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@ -198,7 +210,7 @@ impl Cea708ServiceWriter {
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])
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}
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pub fn rollup_preamble(&mut self, rollup_count: u8, base_row: u8) -> Result<usize, WriteError> {
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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 / 15) as u8;
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gst::trace!(
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@ -229,49 +241,34 @@ impl Cea708ServiceWriter {
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self.push_codes(&codes)
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}
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pub fn write_char(&mut self, c: char) -> Result<usize, WriteError> {
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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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} else {
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Ok(0)
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}
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}
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pub fn push_codes(&mut self, codes: &[Code]) -> Result<usize, WriteError> {
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self.ensure_service();
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let service = self.service.as_mut().unwrap();
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let start_len = service.len();
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if service.free_space() < codes.iter().map(|c| c.byte_len()).sum::<usize>() {
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return Err(WriteError::WouldOverflow(0));
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}
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for code in codes.iter() {
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gst::trace!(
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CAT,
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"pushing for service:{} code: {code:?}",
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service.number()
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);
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service.push_code(code).unwrap();
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}
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Ok(service.len() - start_len)
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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) -> Result<usize, WriteError> {
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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) -> Result<usize, WriteError> {
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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) -> Result<usize, WriteError> {
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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) -> Result<usize, WriteError> {
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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) -> Result<usize, WriteError> {
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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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