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https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
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tttocea708: add element converting from text to cea708 captions
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1406>
This commit is contained in:
Matthew Waters
parent
5d7e068a8b
commit
756abbf807
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@ -5668,6 +5668,101 @@
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},
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"rank": "none"
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},
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"tttocea708": {
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"author": "Matthew Waters <matthew@centricular.com>",
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"description": "Converts timed text to CEA-708 Closed Captions",
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"hierarchy": [
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"GstTtToCea708",
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"GstElement",
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"GstObject",
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"GInitiallyUnowned",
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"GObject"
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],
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"klass": "Generic",
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"pad-templates": {
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"sink": {
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"caps": "text/x-raw:\n",
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"direction": "sink",
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"presence": "always"
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},
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"src": {
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"caps": "closedcaption/x-cea-708:\n format: cc_data\n framerate: [ 1/2147483647, 2147483647/1 ]\n",
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"direction": "src",
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"presence": "always"
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}
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},
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"properties": {
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"mode": {
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"blurb": "Which mode to operate in",
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"conditionally-available": false,
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"construct": false,
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"construct-only": false,
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"controllable": false,
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"default": "roll-up (2)",
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"mutable": "playing",
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"readable": true,
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"type": "GstTtToCea708Mode",
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"writable": true
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},
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"origin-column": {
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"blurb": "Origin column",
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"conditionally-available": false,
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"construct": false,
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"construct-only": false,
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"controllable": false,
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"default": "0",
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"max": "31",
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"min": "0",
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"mutable": "playing",
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"readable": true,
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"type": "guint",
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"writable": true
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},
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"origin-row": {
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"blurb": "Origin row, (-1=automatic)",
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"conditionally-available": false,
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"construct": false,
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"construct-only": false,
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"controllable": false,
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"default": "-1",
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"max": "14",
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"min": "-1",
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"mutable": "playing",
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"readable": true,
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"type": "gint",
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"writable": true
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},
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"roll-up-timeout": {
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"blurb": "Duration after which to erase display memory in roll-up mode",
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"conditionally-available": false,
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"construct": false,
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"construct-only": false,
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"controllable": false,
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"default": "18446744073709551615",
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"max": "18446744073709551615",
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"min": "0",
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"mutable": "playing",
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"readable": true,
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"type": "guint64",
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"writable": true
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},
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"service-number": {
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"blurb": "Write DTVCC packets using this service",
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"conditionally-available": false,
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"construct": false,
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"construct-only": false,
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"controllable": false,
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"default": "1",
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"max": "63",
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"min": "1",
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"mutable": "null",
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"readable": true,
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"type": "guint",
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"writable": true
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}
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},
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"rank": "none"
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},
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"tttojson": {
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"author": "Mathieu Duponchelle <mathieu@centricular.com>",
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"description": "Encodes Timed Text to JSON",
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@ -5761,6 +5856,26 @@
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"value": "4"
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}
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]
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},
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"GstTtToCea708Mode": {
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"kind": "enum",
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"values": [
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{
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"desc": "PopOn",
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"name": "pop-on",
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"value": "0"
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},
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{
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"desc": "PaintOn",
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"name": "paint-on",
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"value": "1"
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},
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{
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"desc": "RollUp",
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"name": "roll-up",
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"value": "2"
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}
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]
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}
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},
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"package": "gst-plugin-closedcaption",
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@ -40,6 +40,7 @@ mod scc_enc;
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mod scc_parse;
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mod transcriberbin;
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mod tttocea608;
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mod tttocea708;
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mod tttojson;
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mod ttutils;
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@ -59,6 +60,7 @@ fn plugin_init(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
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jsontovtt::register(plugin)?;
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transcriberbin::register(plugin)?;
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cea608tocea708::register(plugin)?;
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tttocea708::register(plugin)?;
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Ok(())
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}
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934
video/closedcaption/src/tttocea708/imp.rs
Normal file
934
video/closedcaption/src/tttocea708/imp.rs
Normal file
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@ -0,0 +1,934 @@
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// Copyright (C) 2020 Mathieu Duponchelle <mathieu@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::CCDataWriter;
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use cea708_types::DTVCCPacket;
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use cea708_types::Framerate;
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use gst::glib;
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use gst::prelude::*;
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use gst::subclass::prelude::*;
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use once_cell::sync::Lazy;
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use crate::cea608utils::Cea608Mode;
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use std::sync::Mutex;
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use cea708_types::tables::*;
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use crate::cea608utils::TextStyle;
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use crate::cea708utils::{
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textstyle_foreground_color, textstyle_to_pen_color, Cea708Mode, Cea708ServiceWriter,
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};
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use crate::ttutils::{Chunk, Line, Lines};
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const DEFAULT_FPS_N: i32 = 30;
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const DEFAULT_FPS_D: i32 = 1;
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const DEFAULT_MODE: Cea708Mode = Cea708Mode::RollUp;
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const DEFAULT_ORIGIN_ROW: i32 = -1;
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const DEFAULT_ORIGIN_COLUMN: u32 = 0;
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const DEFAULT_ROLL_UP_ROWS: u8 = 2;
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const DEFAULT_SERVICE_NO: u8 = 1;
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#[derive(Debug, Clone)]
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struct Settings {
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mode: Cea708Mode,
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service_no: u8,
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roll_up_rows: u8,
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origin_row: i32,
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origin_column: u32,
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roll_up_timeout: Option<gst::ClockTime>,
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}
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impl Default for Settings {
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fn default() -> Self {
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Settings {
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mode: DEFAULT_MODE,
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origin_row: DEFAULT_ORIGIN_ROW,
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origin_column: DEFAULT_ORIGIN_COLUMN,
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roll_up_rows: DEFAULT_ROLL_UP_ROWS,
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roll_up_timeout: gst::ClockTime::NONE,
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service_no: DEFAULT_SERVICE_NO,
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}
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}
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}
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struct State {
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sequence_no: u8,
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cc_data_writer: CCDataWriter,
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framerate: gst::Fraction,
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service_writer: Cea708ServiceWriter,
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pen_location: SetPenLocationArgs,
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pen_color: SetPenColorArgs,
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pen_attributes: SetPenAttributesArgs,
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mode: Cea708Mode,
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erase_display_frame_no: Option<u64>,
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last_frame_no: u64,
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max_frame_no: u64,
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send_roll_up_preamble: bool,
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force_clear: bool,
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}
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impl Default for State {
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fn default() -> Self {
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Self {
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sequence_no: 0,
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cc_data_writer: CCDataWriter::default(),
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framerate: gst::Fraction::new(DEFAULT_FPS_N, DEFAULT_FPS_D),
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pen_color: textstyle_to_pen_color(TextStyle::White),
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pen_attributes: SetPenAttributesArgs::new(
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PenSize::Standard,
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FontStyle::Default,
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TextTag::Dialog,
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TextOffset::Normal,
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false,
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false,
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EdgeType::None,
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),
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pen_location: SetPenLocationArgs::new(0, 0),
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service_writer: Cea708ServiceWriter::new(0),
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erase_display_frame_no: None,
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last_frame_no: 0,
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max_frame_no: 0,
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send_roll_up_preamble: false,
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mode: Cea708Mode::PopOn,
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force_clear: false,
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}
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}
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}
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static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
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gst::DebugCategory::new(
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"tttocea708",
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gst::DebugColorFlags::empty(),
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Some("TT CEA 708 Element"),
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)
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});
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fn cc_data_buffer(data: &[u8], pts: gst::ClockTime, duration: gst::ClockTime) -> gst::Buffer {
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let mut ret = gst::Buffer::with_size(data.len()).unwrap();
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let buf_mut = ret.get_mut().unwrap();
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buf_mut.copy_from_slice(0, data).unwrap();
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buf_mut.set_pts(pts);
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buf_mut.set_duration(duration);
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ret
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}
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fn fraction_to_framerate(fraction: gst::Fraction) -> Framerate {
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Framerate::new(fraction.numer() as u32, fraction.denom() as u32)
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}
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impl State {
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fn check_erase_display(&mut self) -> bool {
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if let Some(erase_display_frame_no) = self.erase_display_frame_no {
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if self.last_frame_no == erase_display_frame_no - 1 {
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self.erase_display_frame_no = None;
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self.send_roll_up_preamble = true;
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self.service_writer.clear_current_window();
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return true;
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}
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}
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false
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}
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fn cc_data(&mut self, imp: &TtToCea708, bufferlist: &mut gst::BufferListRef) {
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self.check_erase_display();
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let (fps_n, fps_d) = (self.framerate.numer() as u64, self.framerate.denom() as u64);
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let pts = self
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.last_frame_no
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.seconds()
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.mul_div_round(fps_d, fps_n)
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.unwrap();
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if self.last_frame_no < self.max_frame_no {
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self.last_frame_no += 1;
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} else {
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gst::debug!(CAT, imp: imp, "More text than bandwidth!");
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}
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let next_pts = self
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.last_frame_no
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.seconds()
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.mul_div_round(fps_d, fps_n)
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.unwrap();
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let duration = next_pts - pts;
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let seq_no = self.sequence_no;
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self.sequence_no = (self.sequence_no + 1) & 0x3;
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let mut packet = DTVCCPacket::new(seq_no);
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gst::trace!(CAT, "New packet {}", packet.sequence_no());
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while let Some(service) = self.service_writer.take_service(packet.free_space()) {
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gst::trace!(CAT, "adding service {service:?} to packet");
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packet.push_service(service).unwrap();
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}
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gst::trace!(CAT, "push packet to writer");
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self.cc_data_writer.push_packet(packet);
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let mut cc_data = vec![];
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gst::trace!(CAT, "write packet to data");
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self.cc_data_writer
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.write(fraction_to_framerate(self.framerate), &mut cc_data)
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.unwrap();
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gst::trace!(CAT, "add data to buffer list");
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bufferlist.insert(-1, cc_data_buffer(&cc_data[2..], pts, duration));
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}
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fn pad(&mut self, imp: &TtToCea708, bufferlist: &mut gst::BufferListRef, frame_no: u64) {
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while self.last_frame_no < frame_no {
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if !self.check_erase_display() {
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self.cc_data(imp, bufferlist);
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}
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}
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}
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}
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pub struct TtToCea708 {
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srcpad: gst::Pad,
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sinkpad: gst::Pad,
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// Ordered by locking order
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state: Mutex<State>,
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settings: Mutex<Settings>,
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}
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impl TtToCea708 {
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fn open_line(
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&self,
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state: &mut State,
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settings: &Settings,
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chunk: &Chunk,
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carriage_return: Option<bool>,
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) {
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let do_preamble = match state.mode {
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Cea708Mode::PopOn | Cea708Mode::PaintOn => true,
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Cea708Mode::RollUp => {
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if let Some(carriage_return) = carriage_return {
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if carriage_return {
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state.service_writer.push_codes(&[Code::CR]);
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state.pen_location.column = settings.origin_column as u8;
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true
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} else {
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state.send_roll_up_preamble
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}
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} else {
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state.send_roll_up_preamble
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}
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}
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};
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if do_preamble {
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if state.mode == Cea708Mode::RollUp {
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state
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.service_writer
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.rollup_preamble(settings.roll_up_rows, 15);
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}
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state.send_roll_up_preamble = false;
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}
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let mut need_pen_attributes = false;
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if state.pen_attributes.italics != chunk.style.is_italics() {
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need_pen_attributes = true;
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state.pen_attributes.italics = chunk.style.is_italics();
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}
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if state.pen_attributes.underline != (chunk.underline) {
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need_pen_attributes = true;
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state.pen_attributes.underline = chunk.underline;
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}
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if need_pen_attributes {
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state
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.service_writer
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.set_pen_attributes(state.pen_attributes);
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}
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if state.pen_color.foreground_color != textstyle_foreground_color(chunk.style) {
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state.pen_color.foreground_color = textstyle_foreground_color(chunk.style);
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state.service_writer.set_pen_color(state.pen_color);
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}
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}
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fn peek_word_length(&self, chars: std::iter::Peekable<std::str::Chars>) -> u32 {
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chars.take_while(|c| !c.is_ascii_whitespace()).count() as u32
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}
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fn generate(
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&self,
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state: &mut State,
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settings: &Settings,
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pts: gst::ClockTime,
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duration: gst::ClockTime,
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lines: Lines,
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) -> Result<gst::BufferList, gst::FlowError> {
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let origin_column = settings.origin_column;
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let mut row = 13;
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let mut bufferlist = gst::BufferList::new();
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let mut_list = bufferlist.get_mut().unwrap();
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state.service_writer = Cea708ServiceWriter::new(settings.service_no);
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if state.mode == Cea708Mode::PopOn || state.mode == Cea708Mode::PaintOn {
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state.pen_location.column = 0;
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};
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let (fps_n, fps_d) = (
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state.framerate.numer() as u64,
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state.framerate.denom() as u64,
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);
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let frame_no = pts.mul_div_round(fps_n, fps_d).unwrap().seconds();
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if state.last_frame_no == 0 {
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gst::debug!(CAT, imp: self, "Initial skip to frame no {}", frame_no);
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state.last_frame_no = pts.mul_div_floor(fps_n, fps_d).unwrap().seconds();
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}
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state.max_frame_no = (pts + duration)
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.mul_div_round(fps_n, fps_d)
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.unwrap()
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.seconds();
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state.pad(self, mut_list, frame_no);
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let mut cleared = false;
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let mut need_pen_location = false;
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if let Some(mode) = lines.mode {
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if (mode.is_rollup() && state.mode != Cea708Mode::RollUp)
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|| (mode == Cea608Mode::PaintOn && state.mode != Cea708Mode::PaintOn)
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|| (mode == Cea608Mode::PopOn && state.mode == Cea708Mode::PopOn)
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{
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/* Always erase the display when going to or from pop-on */
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if state.mode == Cea708Mode::PopOn || mode == Cea608Mode::PopOn {
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state.erase_display_frame_no = None;
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state.service_writer.clear_current_window();
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cleared = true;
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}
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state.mode = match mode {
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Cea608Mode::PopOn => Cea708Mode::PopOn,
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Cea608Mode::PaintOn => Cea708Mode::PaintOn,
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Cea608Mode::RollUp2 | Cea608Mode::RollUp3 | Cea608Mode::RollUp4 => {
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Cea708Mode::RollUp
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}
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};
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match state.mode {
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||||
Cea708Mode::RollUp => {
|
||||
state.send_roll_up_preamble = true;
|
||||
}
|
||||
_ => {
|
||||
state.pen_location.column = origin_column as u8;
|
||||
need_pen_location = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if let Some(clear) = lines.clear {
|
||||
if clear && !cleared {
|
||||
state.erase_display_frame_no = None;
|
||||
state.service_writer.clear_current_window();
|
||||
if state.mode != Cea708Mode::PopOn && state.mode != Cea708Mode::PaintOn {
|
||||
state.send_roll_up_preamble = true;
|
||||
}
|
||||
state.pen_location.column = origin_column as u8;
|
||||
need_pen_location = true;
|
||||
}
|
||||
}
|
||||
|
||||
if state.mode == Cea708Mode::PopOn {
|
||||
state.service_writer.popon_preamble();
|
||||
} else if state.mode == Cea708Mode::PaintOn {
|
||||
state.service_writer.paint_on_preamble();
|
||||
}
|
||||
|
||||
for line in &lines.lines {
|
||||
gst::log!(CAT, imp: self, "Processing {:?}", line);
|
||||
|
||||
if let Some(line_row) = line.row {
|
||||
row = line_row;
|
||||
}
|
||||
|
||||
if row > 14 {
|
||||
gst::warning!(CAT, imp: self, "Dropping line after 15th row: {:?}", line);
|
||||
continue;
|
||||
}
|
||||
|
||||
if let Some(line_column) = line.column {
|
||||
if state.mode != Cea708Mode::PopOn && state.mode != Cea708Mode::PaintOn {
|
||||
state.send_roll_up_preamble = true;
|
||||
}
|
||||
state.pen_location.column = line_column as u8;
|
||||
need_pen_location = true;
|
||||
} else if state.mode == Cea708Mode::PopOn || state.mode == Cea708Mode::PaintOn {
|
||||
state.pen_location.column = origin_column as u8;
|
||||
need_pen_location = true;
|
||||
}
|
||||
|
||||
if state.pen_location.row != row as u8 {
|
||||
need_pen_location = true;
|
||||
state.pen_location.row = row as u8;
|
||||
}
|
||||
|
||||
if need_pen_location {
|
||||
state.service_writer.set_pen_location(state.pen_location);
|
||||
}
|
||||
|
||||
for (i, chunk) in line.chunks.iter().enumerate() {
|
||||
let cr = if i == 0 { Some(true) } else { Some(false) };
|
||||
self.open_line(state, settings, chunk, cr);
|
||||
|
||||
let mut chars = chunk.text.chars().peekable();
|
||||
|
||||
while let Some(c) = chars.next() {
|
||||
if c == '\r' {
|
||||
continue;
|
||||
}
|
||||
|
||||
let code = Code::from_char(c).unwrap_or(Code::Space);
|
||||
state.service_writer.push_codes(&[code]);
|
||||
state.pen_location.column += 1;
|
||||
|
||||
if state.mode == Cea708Mode::RollUp {
|
||||
/* In roll-up mode, we introduce carriage returns automatically.
|
||||
* Instead of always wrapping once the last column is reached, we
|
||||
* want to look ahead and check whether the following word will fit
|
||||
* on the current row. If it won't, we insert a carriage return,
|
||||
* unless it won't fit on a full row either, in which case it will need
|
||||
* to be broken up.
|
||||
*/
|
||||
let next_word_length = if c.is_ascii_whitespace() {
|
||||
self.peek_word_length(chars.clone())
|
||||
} else {
|
||||
0
|
||||
};
|
||||
|
||||
if (next_word_length <= 32 - origin_column
|
||||
&& state.pen_location.column as u32 + next_word_length > 31)
|
||||
|| state.pen_location.column > 31
|
||||
{
|
||||
state.pen_location.column = settings.origin_column as u8;
|
||||
state.service_writer.push_codes(&[Code::CR]);
|
||||
}
|
||||
} else if state.pen_location.column > 31 {
|
||||
if chars.peek().is_some() {
|
||||
gst::warning!(
|
||||
CAT,
|
||||
imp: self,
|
||||
"Dropping characters after 32nd column: {}",
|
||||
c
|
||||
);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if state.mode == Cea708Mode::PopOn || state.mode == Cea708Mode::PaintOn {
|
||||
row += 1;
|
||||
}
|
||||
need_pen_location = false;
|
||||
}
|
||||
|
||||
if state.mode == Cea708Mode::PopOn {
|
||||
/* No need to erase the display at this point, end_of_caption will be equivalent */
|
||||
state.erase_display_frame_no = None;
|
||||
state.service_writer.end_of_caption();
|
||||
}
|
||||
|
||||
if state.mode == Cea708Mode::PopOn {
|
||||
state.erase_display_frame_no =
|
||||
Some(state.last_frame_no + duration.mul_div_round(fps_n, fps_d).unwrap().seconds());
|
||||
} else if let Some(timeout) = settings.roll_up_timeout {
|
||||
state.erase_display_frame_no =
|
||||
Some(state.last_frame_no + timeout.mul_div_round(fps_n, fps_d).unwrap().seconds());
|
||||
}
|
||||
state.service_writer.push_codes(&[Code::ETX]);
|
||||
|
||||
state.cc_data(self, mut_list);
|
||||
state.pad(self, mut_list, state.max_frame_no);
|
||||
|
||||
Ok(bufferlist)
|
||||
}
|
||||
|
||||
fn sink_chain(
|
||||
&self,
|
||||
pad: &gst::Pad,
|
||||
buffer: gst::Buffer,
|
||||
) -> Result<gst::FlowSuccess, gst::FlowError> {
|
||||
gst::log!(CAT, imp: self, "Handling {:?}", buffer);
|
||||
|
||||
let pts = buffer.pts().ok_or_else(|| {
|
||||
gst::element_imp_error!(
|
||||
self,
|
||||
gst::StreamError::Format,
|
||||
["Stream with timestamped buffers required"]
|
||||
);
|
||||
gst::FlowError::Error
|
||||
})?;
|
||||
|
||||
let duration = buffer.duration().ok_or_else(|| {
|
||||
gst::element_imp_error!(
|
||||
self,
|
||||
gst::StreamError::Format,
|
||||
["Buffers of stream need to have a duration"]
|
||||
);
|
||||
gst::FlowError::Error
|
||||
})?;
|
||||
|
||||
let data = buffer.map_readable().map_err(|_| {
|
||||
gst::error!(CAT, obj: pad, "Can't map buffer readable");
|
||||
|
||||
gst::FlowError::Error
|
||||
})?;
|
||||
|
||||
let mut state = self.state.lock().unwrap();
|
||||
let settings = self.settings.lock().unwrap();
|
||||
|
||||
let cea608_mode = match settings.mode {
|
||||
Cea708Mode::PaintOn => Cea608Mode::PaintOn,
|
||||
Cea708Mode::PopOn => Cea608Mode::PopOn,
|
||||
Cea708Mode::RollUp => match settings.roll_up_rows {
|
||||
0..=2 => Cea608Mode::RollUp2,
|
||||
3 => Cea608Mode::RollUp3,
|
||||
_ => Cea608Mode::RollUp4,
|
||||
},
|
||||
};
|
||||
|
||||
let mut lines = Lines {
|
||||
lines: Vec::new(),
|
||||
mode: Some(cea608_mode),
|
||||
clear: Some(state.force_clear),
|
||||
};
|
||||
state.force_clear = false;
|
||||
let data = std::str::from_utf8(&data).map_err(|err| {
|
||||
gst::error!(CAT, obj: pad, "Can't decode utf8: {}", err);
|
||||
|
||||
gst::FlowError::Error
|
||||
})?;
|
||||
|
||||
let phrases: Vec<&str> = data.split('\n').collect();
|
||||
let mut row = match settings.origin_row {
|
||||
-1 => match settings.mode {
|
||||
Cea708Mode::PopOn | Cea708Mode::PaintOn => {
|
||||
15u32.saturating_sub(phrases.len() as u32)
|
||||
}
|
||||
Cea708Mode::RollUp => 14,
|
||||
},
|
||||
_ => settings.origin_row as u32,
|
||||
};
|
||||
|
||||
for phrase in &phrases {
|
||||
lines.lines.push(Line {
|
||||
carriage_return: None,
|
||||
column: None,
|
||||
row: Some(row),
|
||||
chunks: vec![Chunk {
|
||||
style: TextStyle::White,
|
||||
underline: false,
|
||||
text: phrase.to_string(),
|
||||
}],
|
||||
});
|
||||
if settings.mode == Cea708Mode::PopOn || settings.mode == Cea708Mode::PaintOn {
|
||||
row += 1;
|
||||
}
|
||||
}
|
||||
|
||||
let bufferlist = self.generate(&mut state, &settings, pts, duration, lines)?;
|
||||
|
||||
drop(settings);
|
||||
drop(state);
|
||||
|
||||
self.srcpad.push_list(bufferlist)
|
||||
}
|
||||
|
||||
fn sink_event(&self, pad: &gst::Pad, event: gst::Event) -> bool {
|
||||
gst::log!(CAT, obj: pad, "Handling event {:?}", event);
|
||||
|
||||
use gst::EventView;
|
||||
|
||||
match event.view() {
|
||||
EventView::Caps(_e) => {
|
||||
let mut downstream_caps = match self.srcpad.allowed_caps() {
|
||||
None => self.srcpad.pad_template_caps(),
|
||||
Some(caps) => caps,
|
||||
};
|
||||
|
||||
if downstream_caps.is_empty() {
|
||||
gst::error!(CAT, obj: pad, "Empty downstream caps");
|
||||
return false;
|
||||
}
|
||||
|
||||
let caps = downstream_caps.make_mut();
|
||||
let s = caps.structure_mut(0).unwrap();
|
||||
|
||||
s.fixate_field_nearest_fraction(
|
||||
"framerate",
|
||||
gst::Fraction::new(DEFAULT_FPS_N, DEFAULT_FPS_D),
|
||||
);
|
||||
s.fixate();
|
||||
|
||||
let caps = gst::Caps::builder_full().structure(s.to_owned()).build();
|
||||
|
||||
let mut state = self.state.lock().unwrap();
|
||||
state.framerate = s.get::<gst::Fraction>("framerate").unwrap();
|
||||
|
||||
gst::debug!(CAT, obj: pad, "Pushing caps {}", caps);
|
||||
|
||||
let new_event = gst::event::Caps::new(&caps);
|
||||
|
||||
drop(state);
|
||||
|
||||
self.srcpad.push_event(new_event)
|
||||
}
|
||||
EventView::Gap(e) => {
|
||||
let mut state = self.state.lock().unwrap();
|
||||
|
||||
let (fps_n, fps_d) = (
|
||||
state.framerate.numer() as u64,
|
||||
state.framerate.denom() as u64,
|
||||
);
|
||||
|
||||
let (timestamp, duration) = e.get();
|
||||
|
||||
if state.last_frame_no == 0 {
|
||||
state.last_frame_no = timestamp.mul_div_floor(fps_n, fps_d).unwrap().seconds();
|
||||
|
||||
gst::debug!(
|
||||
CAT,
|
||||
imp: self,
|
||||
"Initial skip to frame no {}",
|
||||
state.last_frame_no
|
||||
);
|
||||
}
|
||||
|
||||
let frame_no = (timestamp + duration.unwrap_or(gst::ClockTime::ZERO))
|
||||
.mul_div_round(fps_n, fps_d)
|
||||
.unwrap()
|
||||
.seconds();
|
||||
state.max_frame_no = frame_no;
|
||||
|
||||
let mut bufferlist = gst::BufferList::new();
|
||||
let mut_list = bufferlist.get_mut().unwrap();
|
||||
|
||||
state.pad(self, mut_list, frame_no);
|
||||
|
||||
drop(state);
|
||||
|
||||
let _ = self.srcpad.push_list(bufferlist);
|
||||
|
||||
true
|
||||
}
|
||||
EventView::Eos(_) => {
|
||||
let mut state = self.state.lock().unwrap();
|
||||
if let Some(erase_display_frame_no) = state.erase_display_frame_no {
|
||||
let mut bufferlist = gst::BufferList::new();
|
||||
let mut_list = bufferlist.get_mut().unwrap();
|
||||
|
||||
state.max_frame_no = erase_display_frame_no;
|
||||
state.pad(self, mut_list, erase_display_frame_no);
|
||||
|
||||
drop(state);
|
||||
|
||||
let _ = self.srcpad.push_list(bufferlist);
|
||||
} else {
|
||||
drop(state);
|
||||
}
|
||||
|
||||
gst::Pad::event_default(pad, Some(&*self.obj()), event)
|
||||
}
|
||||
EventView::FlushStop(_) => {
|
||||
let mut state = self.state.lock().unwrap();
|
||||
let settings = self.settings.lock().unwrap();
|
||||
|
||||
*state = State::default();
|
||||
|
||||
state.mode = settings.mode;
|
||||
|
||||
if state.mode != Cea708Mode::PopOn {
|
||||
state.send_roll_up_preamble = true;
|
||||
}
|
||||
|
||||
drop(settings);
|
||||
drop(state);
|
||||
|
||||
gst::Pad::event_default(pad, Some(&*self.obj()), event)
|
||||
}
|
||||
_ => gst::Pad::event_default(pad, Some(&*self.obj()), event),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[glib::object_subclass]
|
||||
impl ObjectSubclass for TtToCea708 {
|
||||
const NAME: &'static str = "GstTtToCea708";
|
||||
type Type = super::TtToCea708;
|
||||
type ParentType = gst::Element;
|
||||
|
||||
fn with_class(klass: &Self::Class) -> Self {
|
||||
let templ = klass.pad_template("sink").unwrap();
|
||||
let sinkpad = gst::Pad::builder_from_template(&templ)
|
||||
.chain_function(|pad, parent, buffer| {
|
||||
TtToCea708::catch_panic_pad_function(
|
||||
parent,
|
||||
|| Err(gst::FlowError::Error),
|
||||
|this| this.sink_chain(pad, buffer),
|
||||
)
|
||||
})
|
||||
.event_function(|pad, parent, event| {
|
||||
TtToCea708::catch_panic_pad_function(
|
||||
parent,
|
||||
|| false,
|
||||
|this| this.sink_event(pad, event),
|
||||
)
|
||||
})
|
||||
.flags(gst::PadFlags::FIXED_CAPS)
|
||||
.build();
|
||||
|
||||
let templ = klass.pad_template("src").unwrap();
|
||||
let srcpad = gst::Pad::builder_from_template(&templ)
|
||||
.flags(gst::PadFlags::FIXED_CAPS)
|
||||
.build();
|
||||
|
||||
Self {
|
||||
srcpad,
|
||||
sinkpad,
|
||||
state: Mutex::new(State::default()),
|
||||
settings: Mutex::new(Settings::default()),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl ObjectImpl for TtToCea708 {
|
||||
fn properties() -> &'static [glib::ParamSpec] {
|
||||
static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
|
||||
vec![
|
||||
glib::ParamSpecEnum::builder_with_default("mode", DEFAULT_MODE)
|
||||
.nick("Mode")
|
||||
.blurb("Which mode to operate in")
|
||||
.mutable_playing()
|
||||
.build(),
|
||||
glib::ParamSpecInt::builder("origin-row")
|
||||
.nick("Origin row")
|
||||
.blurb("Origin row, (-1=automatic)")
|
||||
.minimum(-1)
|
||||
.maximum(14)
|
||||
.default_value(DEFAULT_ORIGIN_ROW)
|
||||
.mutable_playing()
|
||||
.build(),
|
||||
glib::ParamSpecUInt::builder("origin-column")
|
||||
.nick("Origin column")
|
||||
.blurb("Origin column")
|
||||
.maximum(31)
|
||||
.default_value(DEFAULT_ORIGIN_COLUMN)
|
||||
.mutable_playing()
|
||||
.build(),
|
||||
glib::ParamSpecUInt64::builder("roll-up-timeout")
|
||||
.nick("Roll-Up Timeout")
|
||||
.blurb("Duration after which to erase display memory in roll-up mode")
|
||||
.default_value(u64::MAX)
|
||||
.mutable_playing()
|
||||
.build(),
|
||||
glib::ParamSpecUInt::builder("service-number")
|
||||
.nick("Service Number")
|
||||
.blurb("Write DTVCC packets using this service")
|
||||
.default_value(DEFAULT_SERVICE_NO as u32)
|
||||
.minimum(1)
|
||||
.maximum(63)
|
||||
.build(),
|
||||
]
|
||||
});
|
||||
|
||||
PROPERTIES.as_ref()
|
||||
}
|
||||
|
||||
fn constructed(&self) {
|
||||
self.parent_constructed();
|
||||
|
||||
let obj = self.obj();
|
||||
obj.add_pad(&self.sinkpad).unwrap();
|
||||
obj.add_pad(&self.srcpad).unwrap();
|
||||
}
|
||||
|
||||
fn set_property(&self, _id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
|
||||
match pspec.name() {
|
||||
"mode" => {
|
||||
let mut state = self.state.lock().unwrap();
|
||||
let mut settings = self.settings.lock().unwrap();
|
||||
settings.mode = value.get::<Cea708Mode>().expect("type checked upstream");
|
||||
state.force_clear = true;
|
||||
}
|
||||
"origin-row" => {
|
||||
let mut state = self.state.lock().unwrap();
|
||||
let mut settings = self.settings.lock().unwrap();
|
||||
settings.origin_row = value.get().expect("type checked upstream");
|
||||
state.force_clear = true;
|
||||
}
|
||||
"origin-column" => {
|
||||
let mut settings = self.settings.lock().unwrap();
|
||||
let mut state = self.state.lock().unwrap();
|
||||
settings.origin_column = value.get().expect("type checked upstream");
|
||||
state.force_clear = true;
|
||||
state.pen_location.column = settings.origin_column as u8;
|
||||
}
|
||||
"roll-up-timeout" => {
|
||||
let mut settings = self.settings.lock().unwrap();
|
||||
|
||||
let timeout = value.get().expect("type checked upstream");
|
||||
|
||||
settings.roll_up_timeout = match timeout {
|
||||
u64::MAX => gst::ClockTime::NONE,
|
||||
_ => Some(timeout.nseconds()),
|
||||
};
|
||||
}
|
||||
"service-number" => {
|
||||
let mut settings = self.settings.lock().unwrap();
|
||||
settings.service_no = value.get::<u32>().expect("type checked upstream") as u8;
|
||||
}
|
||||
_ => unimplemented!(),
|
||||
}
|
||||
}
|
||||
|
||||
fn property(&self, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
|
||||
match pspec.name() {
|
||||
"mode" => {
|
||||
let settings = self.settings.lock().unwrap();
|
||||
settings.mode.to_value()
|
||||
}
|
||||
"origin-row" => {
|
||||
let settings = self.settings.lock().unwrap();
|
||||
settings.origin_row.to_value()
|
||||
}
|
||||
"origin-column" => {
|
||||
let settings = self.settings.lock().unwrap();
|
||||
settings.origin_column.to_value()
|
||||
}
|
||||
"roll-up-timeout" => {
|
||||
let settings = self.settings.lock().unwrap();
|
||||
|
||||
if let Some(timeout) = settings.roll_up_timeout {
|
||||
timeout.nseconds().to_value()
|
||||
} else {
|
||||
u64::MAX.to_value()
|
||||
}
|
||||
}
|
||||
"service-number" => {
|
||||
let settings = self.settings.lock().unwrap();
|
||||
(settings.service_no as u32).to_value()
|
||||
}
|
||||
_ => unimplemented!(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl GstObjectImpl for TtToCea708 {}
|
||||
|
||||
impl ElementImpl for TtToCea708 {
|
||||
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
|
||||
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
|
||||
gst::subclass::ElementMetadata::new(
|
||||
"TT to CEA-708",
|
||||
"Generic",
|
||||
"Converts timed text to CEA-708 Closed Captions",
|
||||
"Matthew Waters <matthew@centricular.com>",
|
||||
)
|
||||
});
|
||||
|
||||
Some(&*ELEMENT_METADATA)
|
||||
}
|
||||
|
||||
fn pad_templates() -> &'static [gst::PadTemplate] {
|
||||
static PAD_TEMPLATES: Lazy<Vec<gst::PadTemplate>> = Lazy::new(|| {
|
||||
let mut caps = gst::Caps::new_empty();
|
||||
{
|
||||
let caps = caps.get_mut().unwrap();
|
||||
|
||||
let s = gst::Structure::builder("text/x-raw").build();
|
||||
caps.append_structure(s);
|
||||
/*
|
||||
let s = gst::Structure::builder("application/x-json")
|
||||
.field("format", "cea608")
|
||||
.build();
|
||||
caps.append_structure(s);*/
|
||||
}
|
||||
|
||||
let sink_pad_template = gst::PadTemplate::new(
|
||||
"sink",
|
||||
gst::PadDirection::Sink,
|
||||
gst::PadPresence::Always,
|
||||
&caps,
|
||||
)
|
||||
.unwrap();
|
||||
|
||||
let framerate = gst::FractionRange::new(
|
||||
gst::Fraction::new(1, std::i32::MAX),
|
||||
gst::Fraction::new(std::i32::MAX, 1),
|
||||
);
|
||||
|
||||
let caps = gst::Caps::builder("closedcaption/x-cea-708")
|
||||
.field("format", "cc_data")
|
||||
.field("framerate", framerate)
|
||||
.build();
|
||||
|
||||
let src_pad_template = gst::PadTemplate::new(
|
||||
"src",
|
||||
gst::PadDirection::Src,
|
||||
gst::PadPresence::Always,
|
||||
&caps,
|
||||
)
|
||||
.unwrap();
|
||||
|
||||
vec![src_pad_template, sink_pad_template]
|
||||
});
|
||||
|
||||
PAD_TEMPLATES.as_ref()
|
||||
}
|
||||
|
||||
#[allow(clippy::single_match)]
|
||||
fn change_state(
|
||||
&self,
|
||||
transition: gst::StateChange,
|
||||
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
|
||||
gst::trace!(CAT, imp: self, "Changing state {:?}", transition);
|
||||
|
||||
match transition {
|
||||
gst::StateChange::ReadyToPaused => {
|
||||
let mut state = self.state.lock().unwrap();
|
||||
let settings = self.settings.lock().unwrap();
|
||||
*state = State::default();
|
||||
state.force_clear = false;
|
||||
state.mode = settings.mode;
|
||||
if state.mode != Cea708Mode::PopOn {
|
||||
state.send_roll_up_preamble = true;
|
||||
state.pen_location.column = settings.origin_column as u8;
|
||||
}
|
||||
}
|
||||
_ => (),
|
||||
}
|
||||
|
||||
let ret = self.parent_change_state(transition)?;
|
||||
|
||||
match transition {
|
||||
gst::StateChange::PausedToReady => {
|
||||
let mut state = self.state.lock().unwrap();
|
||||
*state = State::default();
|
||||
}
|
||||
_ => (),
|
||||
}
|
||||
|
||||
Ok(ret)
|
||||
}
|
||||
}
|
||||
25
video/closedcaption/src/tttocea708/mod.rs
Normal file
25
video/closedcaption/src/tttocea708/mod.rs
Normal file
|
|
@ -0,0 +1,25 @@
|
|||
// Copyright (C) 2023 Matthew Waters <matthew@centricular.com>
|
||||
//
|
||||
// This Source Code Form is subject to the terms of the Mozilla Public License, v2.0.
|
||||
// If a copy of the MPL was not distributed with this file, You can obtain one at
|
||||
// <https://mozilla.org/MPL/2.0/>.
|
||||
//
|
||||
// SPDX-License-Identifier: MPL-2.0
|
||||
|
||||
use gst::glib;
|
||||
use gst::prelude::*;
|
||||
|
||||
mod imp;
|
||||
|
||||
glib::wrapper! {
|
||||
pub struct TtToCea708(ObjectSubclass<imp::TtToCea708>) @extends gst::Element, gst::Object;
|
||||
}
|
||||
|
||||
pub fn register(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
|
||||
gst::Element::register(
|
||||
Some(plugin),
|
||||
"tttocea708",
|
||||
gst::Rank::NONE,
|
||||
TtToCea708::static_type(),
|
||||
)
|
||||
}
|
||||
Loading…
Reference in a new issue