mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-05-10 12:22:52 +00:00
649 lines
21 KiB
Rust
649 lines
21 KiB
Rust
// Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the
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// Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
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// Boston, MA 02110-1335, USA.
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use glib::prelude::*;
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use glib::subclass::prelude::*;
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use gst::prelude::*;
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use gst::structure;
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use gst::subclass::prelude::*;
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use gst::{gst_error, gst_log, gst_trace};
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use chrono::prelude::*;
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use uuid::Uuid;
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use once_cell::sync::Lazy;
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use std::io::Write;
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use std::sync::Mutex;
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use super::headers::*;
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#[derive(Clone, Copy, Debug, PartialEq, Eq)]
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enum Format {
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Cea708Cdp,
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Cea608,
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}
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#[derive(Debug)]
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struct State {
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format: Option<Format>,
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need_headers: 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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format: None,
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need_headers: true,
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}
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}
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}
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#[derive(Debug, Clone)]
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struct Settings {
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uuid: Option<String>,
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creation_date: Option<glib::DateTime>,
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}
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impl Default for Settings {
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fn default() -> Self {
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Self {
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uuid: None,
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creation_date: None,
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}
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}
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}
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pub struct MccEnc {
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srcpad: gst::Pad,
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sinkpad: gst::Pad,
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state: Mutex<State>,
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settings: Mutex<Settings>,
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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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"mccenc",
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gst::DebugColorFlags::empty(),
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Some("Mcc Encoder Element"),
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)
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});
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impl MccEnc {
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#[allow(clippy::write_with_newline)]
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fn generate_headers(&self, _state: &State, buffer: &mut Vec<u8>) -> Result<(), gst::FlowError> {
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let settings = self.settings.lock().unwrap();
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let caps = self
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.sinkpad
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.current_caps()
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.ok_or(gst::FlowError::NotNegotiated)?;
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let framerate = match caps
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.structure(0)
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.unwrap()
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.get_some::<gst::Fraction>("framerate")
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{
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Ok(framerate) => framerate,
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Err(structure::GetError::FieldNotFound { .. }) => {
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return Err(gst::FlowError::NotNegotiated);
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}
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err => panic!("MccEnc::generate_headers caps: {:?}", err),
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};
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if framerate == gst::Fraction::new(60000, 1001) {
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buffer.extend_from_slice(PREAMBLE_V2);
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} else {
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buffer.extend_from_slice(PREAMBLE_V1);
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}
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if let Some(ref uuid) = settings.uuid {
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let _ = write!(buffer, "UUID={}\r\n", uuid);
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} else {
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let _ = write!(buffer, "UUID={:X}\r\n", Uuid::new_v4().to_hyphenated());
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}
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let _ = write!(
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buffer,
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"Creation Program=GStreamer MCC Encoder {}\r\n",
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env!("CARGO_PKG_VERSION")
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);
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if let Some(ref creation_date) = settings.creation_date {
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let creation_date = Utc
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.ymd(
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creation_date.year() as i32,
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creation_date.month() as u32,
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creation_date.day_of_month() as u32,
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)
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.and_hms(
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creation_date.hour() as u32,
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creation_date.minute() as u32,
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creation_date.seconds() as u32,
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)
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.with_timezone(&FixedOffset::east(
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(creation_date.utc_offset() / 1_000_000) as i32,
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));
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let _ = write!(
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buffer,
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"Creation Date={}\r\n",
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creation_date.format("%A, %B %d, %Y")
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);
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let _ = write!(
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buffer,
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"Creation Time={}\r\n",
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creation_date.format("%H:%M:%S")
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);
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} else {
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let creation_date = Local::now();
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let _ = write!(
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buffer,
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"Creation Date={}\r\n",
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creation_date.format("%A, %B %d, %Y")
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);
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let _ = write!(
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buffer,
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"Creation Time={}\r\n",
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creation_date.format("%H:%M:%S")
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);
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}
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if *framerate.denom() == 1 {
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let _ = write!(buffer, "Time Code Rate={}\r\n", *framerate.numer());
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} else {
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assert_eq!(*framerate.denom(), 1001);
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let _ = write!(buffer, "Time Code Rate={}DF\r\n", *framerate.numer() / 1000);
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}
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let _ = write!(buffer, "\r\n");
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Ok(())
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}
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fn encode_payload(outbuf: &mut Vec<u8>, mut slice: &[u8]) {
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while !slice.is_empty() {
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if slice.starts_with(
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[
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0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA,
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0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00,
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0x00,
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]
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.as_ref(),
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) {
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outbuf.push(b'O');
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slice = &slice[27..];
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} else if slice.starts_with(
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[
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0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA,
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0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00,
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]
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.as_ref(),
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) {
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outbuf.push(b'N');
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slice = &slice[24..];
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} else if slice.starts_with(
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[
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0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA,
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0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00,
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]
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.as_ref(),
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) {
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outbuf.push(b'M');
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slice = &slice[21..];
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} else if slice.starts_with(
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[
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0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA,
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0x00, 0x00, 0xFA, 0x00, 0x00,
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]
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.as_ref(),
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) {
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outbuf.push(b'L');
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slice = &slice[18..];
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} else if slice.starts_with(
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[
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0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA,
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0x00, 0x00,
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]
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.as_ref(),
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) {
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outbuf.push(b'K');
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slice = &slice[15..];
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} else if slice.starts_with(
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[
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0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00,
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]
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.as_ref(),
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) {
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outbuf.push(b'J');
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slice = &slice[12..];
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} else if slice
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.starts_with([0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00].as_ref())
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{
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outbuf.push(b'I');
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slice = &slice[9..];
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} else if slice.starts_with([0xFA, 0x00, 0x00, 0xFA, 0x00, 0x00].as_ref()) {
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outbuf.push(b'H');
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slice = &slice[6..];
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} else if slice.starts_with([0xFA, 0x00, 0x00].as_ref()) {
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outbuf.push(b'G');
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slice = &slice[3..];
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} else if slice.starts_with([0xFB, 0x80, 0x80].as_ref()) {
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outbuf.push(b'P');
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slice = &slice[3..];
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} else if slice.starts_with([0xFC, 0x80, 0x80].as_ref()) {
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outbuf.push(b'Q');
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slice = &slice[3..];
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} else if slice.starts_with([0xFD, 0x80, 0x80].as_ref()) {
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outbuf.push(b'R');
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slice = &slice[3..];
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} else if slice.starts_with([0x96, 0x69].as_ref()) {
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outbuf.push(b'S');
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slice = &slice[2..];
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} else if slice.starts_with([0x61, 0x01].as_ref()) {
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outbuf.push(b'T');
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slice = &slice[2..];
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} else if slice.starts_with([0xE1, 0x00, 0x00, 0x00].as_ref()) {
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outbuf.push(b'U');
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slice = &slice[4..];
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} else if slice[0] == 0x00 {
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outbuf.push(b'Z');
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slice = &slice[1..];
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} else {
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let _ = write!(outbuf, "{:02X}", slice[0]);
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slice = &slice[1..];
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}
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}
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}
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fn generate_caption(
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&self,
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element: &super::MccEnc,
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state: &State,
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buffer: &gst::Buffer,
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outbuf: &mut Vec<u8>,
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) -> Result<(), gst::FlowError> {
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let meta = buffer
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.meta::<gst_video::VideoTimeCodeMeta>()
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.ok_or_else(|| {
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gst::element_error!(
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element,
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gst::StreamError::Format,
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["Stream with timecodes on each buffer required"]
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);
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gst::FlowError::Error
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})?;
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let _ = write!(outbuf, "{}\t", meta.tc());
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let map = buffer.map_readable().map_err(|_| {
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gst::element_error!(
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element,
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gst::StreamError::Format,
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["Failed to map buffer readable"]
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);
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gst::FlowError::Error
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})?;
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let len = map.len();
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if len >= 256 {
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gst::element_error!(
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element,
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gst::StreamError::Format,
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["Too big buffer: {}", map.len()]
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);
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return Err(gst::FlowError::Error);
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}
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let len = len as u8;
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match state.format {
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Some(Format::Cea608) => {
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let _ = write!(outbuf, "6102{:02X}", len);
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}
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Some(Format::Cea708Cdp) => {
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let _ = write!(outbuf, "T{:02X}", len);
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}
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_ => return Err(gst::FlowError::NotNegotiated),
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};
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let checksum = map.iter().fold(0u8, |sum, b| sum.wrapping_add(*b));
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Self::encode_payload(outbuf, &*map);
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if checksum == 0 {
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outbuf.push(b'Z');
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} else {
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let _ = write!(outbuf, "{:02X}", checksum);
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}
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outbuf.extend_from_slice(b"\r\n".as_ref());
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Ok(())
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}
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fn sink_chain(
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&self,
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pad: &gst::Pad,
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element: &super::MccEnc,
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buffer: gst::Buffer,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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gst_log!(CAT, obj: pad, "Handling buffer {:?}", buffer);
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let mut state = self.state.lock().unwrap();
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let mut outbuf = Vec::new();
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if state.need_headers {
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state.need_headers = false;
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self.generate_headers(&*state, &mut outbuf)?;
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}
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self.generate_caption(element, &*state, &buffer, &mut outbuf)?;
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let mut buf = gst::Buffer::from_mut_slice(outbuf);
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buffer
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.copy_into(buf.get_mut().unwrap(), gst::BUFFER_COPY_METADATA, 0, None)
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.expect("Failed to copy buffer metadata");
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drop(state);
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self.srcpad.push(buf)
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}
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fn sink_event(&self, pad: &gst::Pad, element: &super::MccEnc, event: gst::Event) -> bool {
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use gst::EventView;
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gst_log!(CAT, obj: pad, "Handling event {:?}", event);
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match event.view() {
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EventView::Caps(ev) => {
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let caps = ev.caps();
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let s = caps.structure(0).unwrap();
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let framerate = match s.get_some::<gst::Fraction>("framerate") {
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Ok(framerate) => framerate,
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Err(structure::GetError::FieldNotFound { .. }) => {
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gst_error!(CAT, obj: pad, "Caps without framerate");
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return false;
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}
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err => panic!("MccEnc::sink_event caps: {:?}", err),
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};
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let mut state = self.state.lock().unwrap();
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if s.name() == "closedcaption/x-cea-608" {
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state.format = Some(Format::Cea608);
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} else {
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state.format = Some(Format::Cea708Cdp);
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}
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drop(state);
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// We send our own caps downstream
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let caps = gst::Caps::builder("application/x-mcc")
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.field(
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"version",
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if framerate == gst::Fraction::new(60000, 1001) {
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&2i32
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} else {
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&1i32
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},
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)
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.build();
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self.srcpad.push_event(gst::event::Caps::new(&caps))
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}
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_ => pad.event_default(Some(element), event),
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}
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}
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fn src_event(&self, pad: &gst::Pad, element: &super::MccEnc, event: gst::Event) -> bool {
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use gst::EventView;
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gst_log!(CAT, obj: pad, "Handling event {:?}", event);
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match event.view() {
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EventView::Seek(_) => {
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gst_log!(CAT, obj: pad, "Dropping seek event");
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false
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}
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_ => pad.event_default(Some(element), event),
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}
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}
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fn src_query(
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&self,
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pad: &gst::Pad,
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element: &super::MccEnc,
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query: &mut gst::QueryRef,
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) -> bool {
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use gst::QueryView;
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gst_log!(CAT, obj: pad, "Handling query {:?}", query);
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match query.view_mut() {
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QueryView::Seeking(mut q) => {
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// We don't support any seeking at all
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let fmt = q.format();
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q.set(
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false,
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gst::GenericFormattedValue::Other(fmt, -1),
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gst::GenericFormattedValue::Other(fmt, -1),
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);
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true
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}
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_ => pad.query_default(Some(element), query),
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}
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}
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}
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|
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#[glib::object_subclass]
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impl ObjectSubclass for MccEnc {
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const NAME: &'static str = "RsMccEnc";
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type Type = super::MccEnc;
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type ParentType = gst::Element;
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fn with_class(klass: &Self::Class) -> Self {
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let templ = klass.pad_template("sink").unwrap();
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let sinkpad = gst::Pad::builder_with_template(&templ, Some("sink"))
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.chain_function(|pad, parent, buffer| {
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MccEnc::catch_panic_pad_function(
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parent,
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|| Err(gst::FlowError::Error),
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|enc, element| enc.sink_chain(pad, element, buffer),
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)
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})
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.event_function(|pad, parent, event| {
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MccEnc::catch_panic_pad_function(
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parent,
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|| false,
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|enc, element| enc.sink_event(pad, element, event),
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)
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})
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.build();
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let templ = klass.pad_template("src").unwrap();
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let srcpad = gst::Pad::builder_with_template(&templ, Some("src"))
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.event_function(|pad, parent, event| {
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MccEnc::catch_panic_pad_function(
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parent,
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|| false,
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|enc, element| enc.src_event(pad, element, event),
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)
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})
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.query_function(|pad, parent, query| {
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MccEnc::catch_panic_pad_function(
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parent,
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|| false,
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|enc, element| enc.src_query(pad, element, query),
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)
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})
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.build();
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|
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Self {
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srcpad,
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sinkpad,
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state: Mutex::new(State::default()),
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settings: Mutex::new(Settings::default()),
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}
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}
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}
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|
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impl ObjectImpl for MccEnc {
|
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fn properties() -> &'static [glib::ParamSpec] {
|
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static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
|
|
vec![
|
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glib::ParamSpec::new_string(
|
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"uuid",
|
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"UUID",
|
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"UUID for the output file",
|
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None,
|
|
glib::ParamFlags::READWRITE | gst::PARAM_FLAG_MUTABLE_READY,
|
|
),
|
|
glib::ParamSpec::new_boxed(
|
|
"creation-date",
|
|
"Creation Date",
|
|
"Creation date for the output file",
|
|
glib::DateTime::static_type(),
|
|
glib::ParamFlags::READWRITE | gst::PARAM_FLAG_MUTABLE_READY,
|
|
),
|
|
]
|
|
});
|
|
|
|
PROPERTIES.as_ref()
|
|
}
|
|
|
|
fn set_property(
|
|
&self,
|
|
_obj: &Self::Type,
|
|
_id: usize,
|
|
value: &glib::Value,
|
|
pspec: &glib::ParamSpec,
|
|
) {
|
|
match pspec.name() {
|
|
"uuid" => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.uuid = value.get().expect("type checked upstream");
|
|
}
|
|
"creation-date" => {
|
|
let mut settings = self.settings.lock().unwrap();
|
|
settings.creation_date = value.get().expect("type checked upstream");
|
|
}
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn property(&self, _obj: &Self::Type, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
|
|
match pspec.name() {
|
|
"uuid" => {
|
|
let settings = self.settings.lock().unwrap();
|
|
settings.uuid.to_value()
|
|
}
|
|
"creation-date" => {
|
|
let settings = self.settings.lock().unwrap();
|
|
settings.creation_date.to_value()
|
|
}
|
|
_ => unimplemented!(),
|
|
}
|
|
}
|
|
|
|
fn constructed(&self, obj: &Self::Type) {
|
|
self.parent_constructed(obj);
|
|
|
|
obj.add_pad(&self.sinkpad).unwrap();
|
|
obj.add_pad(&self.srcpad).unwrap();
|
|
}
|
|
}
|
|
|
|
impl ElementImpl for MccEnc {
|
|
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
|
|
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
|
|
gst::subclass::ElementMetadata::new(
|
|
"Mcc Encoder",
|
|
"Encoder/ClosedCaption",
|
|
"Encodes MCC Closed Caption Files",
|
|
"Sebastian Dröge <sebastian@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 framerates = gst::List::new(&[
|
|
&gst::Fraction::new(24, 1),
|
|
&gst::Fraction::new(25, 1),
|
|
&gst::Fraction::new(30000, 1001),
|
|
&gst::Fraction::new(30, 1),
|
|
&gst::Fraction::new(50, 1),
|
|
&gst::Fraction::new(60000, 1001),
|
|
&gst::Fraction::new(60, 1),
|
|
]);
|
|
|
|
let s = gst::Structure::builder("closedcaption/x-cea-708")
|
|
.field("format", &"cdp")
|
|
.field("framerate", &framerates)
|
|
.build();
|
|
caps.append_structure(s);
|
|
|
|
let s = gst::Structure::builder("closedcaption/x-cea-608")
|
|
.field("format", &"s334-1a")
|
|
.field("framerate", &framerates)
|
|
.build();
|
|
caps.append_structure(s);
|
|
}
|
|
let sink_pad_template = gst::PadTemplate::new(
|
|
"sink",
|
|
gst::PadDirection::Sink,
|
|
gst::PadPresence::Always,
|
|
&caps,
|
|
)
|
|
.unwrap();
|
|
|
|
let caps = gst::Caps::builder("application/x-mcc").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()
|
|
}
|
|
|
|
fn change_state(
|
|
&self,
|
|
element: &Self::Type,
|
|
transition: gst::StateChange,
|
|
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
|
|
gst_trace!(CAT, obj: element, "Changing state {:?}", transition);
|
|
|
|
match transition {
|
|
gst::StateChange::ReadyToPaused | gst::StateChange::PausedToReady => {
|
|
// Reset the whole state
|
|
let mut state = self.state.lock().unwrap();
|
|
*state = State::default();
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
self.parent_change_state(element, transition)
|
|
}
|
|
}
|