mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-05-09 20:02:41 +00:00
4ad101b53b
The glib crate does not depend on it anymore and also does not re-export it anymore. Also switch some usages of OnceCell to OnceLock from std. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1441>
647 lines
24 KiB
Rust
647 lines
24 KiB
Rust
//! NDI Closed Caption encoder and parser
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//!
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//! See:
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//!
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//! * http://www.sienna-tv.com/ndi/ndiclosedcaptions.html
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//! * http://www.sienna-tv.com/ndi/ndiclosedcaptions608.html
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use anyhow::{bail, Result};
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use data_encoding::BASE64;
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use smallvec::SmallVec;
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use gst::glib::translate::IntoGlib;
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use gst_video::{VideoAncillary, VideoAncillaryDID16, VideoVBIEncoder, VideoVBIParser};
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use once_cell::sync::Lazy;
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use std::ffi::CString;
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static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
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gst::DebugCategory::new(
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"ndiccmeta",
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gst::DebugColorFlags::empty(),
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Some("NewTek NDI CC Meta"),
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)
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});
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const C608_TAG: &str = "C608";
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const C608_TAG_BYTES: &[u8] = C608_TAG.as_bytes();
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const C708_TAG: &str = "C708";
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const C708_TAG_BYTES: &[u8] = C708_TAG.as_bytes();
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const LINE_ATTR: &str = "line";
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const DEFAULT_LINE: u8 = 21;
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const DEFAULT_LINE_STR: &str = "21";
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const DEFAULT_LINE_C708_STR: &str = "10";
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// Video anc AFD content:
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// ADF + DID/SDID + DATA COUNT + PAYLOAD + checksum:
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// 3 + 2 + 1 + 256 max + 1 = 263
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// Those are 10bit words, so we need 329 bytes max.
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pub const VIDEO_ANC_AFD_CAPACITY: usize = 329;
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/// Video anc AFD content padded to 32bit alignment encoded in base64 + padding
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const NDI_CC_CONTENT_CAPACITY: usize = (VIDEO_ANC_AFD_CAPACITY + 3) * 3 / 2 + 2;
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/// Video anc AFD padded to 32bit alignment encoded in base64
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/// + XML tags with brackets and end '/' + attr
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const NDI_CC_CAPACITY: usize = NDI_CC_CONTENT_CAPACITY + 13 + 10;
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#[derive(thiserror::Error, Debug, Eq, PartialEq)]
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/// NDI Video Captions related Errors.
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pub enum NDICCError {
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#[error("Unsupported closed caption type {cc_type:?}")]
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UnsupportedCC {
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cc_type: gst_video::VideoCaptionType,
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},
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#[error("Unexpected AFD data count {found}. Expected: {expected}")]
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UnexpectedAfdDataCount { found: u8, expected: u8 },
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#[error("Unexpected AFD did {found}. Expected: {expected}")]
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UnexpectedAfdDid { found: i32, expected: i32 },
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}
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impl NDICCError {
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fn new_unexpected_afd_did(found: VideoAncillaryDID16, expected: VideoAncillaryDID16) -> Self {
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NDICCError::UnexpectedAfdDid {
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found: found.into_glib(),
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expected: expected.into_glib(),
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}
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}
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}
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/// NDI Closed Captions Meta encoder.
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pub struct NDICCMetaEncoder {
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v210_encoder: VideoVBIEncoder,
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width: u32,
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line_buf: Vec<u8>,
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}
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impl NDICCMetaEncoder {
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pub fn new(width: u32) -> Self {
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let v210_encoder = VideoVBIEncoder::try_new(gst_video::VideoFormat::V210, width).unwrap();
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NDICCMetaEncoder {
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line_buf: vec![0; v210_encoder.line_buffer_len()],
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v210_encoder,
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width,
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}
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}
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pub fn set_width(&mut self, width: u32) {
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if width != self.width {
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*self = Self::new(width);
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}
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}
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/// Encodes the VideoCaptionMeta of the provided `gst::Buffer`
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/// in an NDI closed caption metadata suitable to be attached to an NDI video frame.
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pub fn encode(&mut self, video_buf: &gst::BufferRef) -> Option<CString> {
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use quick_xml::events::{BytesEnd, BytesStart, Event};
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use quick_xml::writer::Writer;
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video_buf.meta::<gst_video::VideoCaptionMeta>()?;
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// Start with an initial capacity suitable to store one ndi cc metadata
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let mut xml_writer = Writer::new(Vec::with_capacity(NDI_CC_CAPACITY));
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let cc_meta_iter = video_buf.iter_meta::<gst_video::VideoCaptionMeta>();
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for cc_meta in cc_meta_iter {
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let cc_data = cc_meta.data();
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if cc_data.is_empty() {
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continue;
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}
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use gst_video::VideoCaptionType::*;
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match cc_meta.caption_type() {
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Cea608Raw => {
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if cc_data.len() != 2 {
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let err = NDICCError::UnexpectedAfdDataCount {
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found: cc_data.len() as u8,
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expected: 2,
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};
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gst::error!(CAT, "Failed to encode Cea608Raw metadata: {err}");
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continue;
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}
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let res = self.add_did16_ancillary(
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VideoAncillaryDID16::S334Eia608,
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&[DEFAULT_LINE, cc_data[0], cc_data[1]],
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);
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if let Err(err) = res {
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gst::error!(CAT, "Failed to add Cea608Raw metadata: {err}");
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continue;
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}
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let mut elem = BytesStart::new(C608_TAG);
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elem.push_attribute((LINE_ATTR, DEFAULT_LINE_STR));
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xml_writer.write_event(Event::Start(elem)).unwrap();
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self.write_v210_base64(&mut xml_writer);
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xml_writer
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.write_event(Event::End(BytesEnd::new(C608_TAG)))
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.unwrap();
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}
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Cea608S3341a => {
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if cc_data.len() != 3 {
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let err = NDICCError::UnexpectedAfdDataCount {
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found: cc_data.len() as u8,
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expected: 3,
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};
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gst::error!(CAT, "Failed to encode Cea608Raw metadata: {err}");
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continue;
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}
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let res = self.add_did16_ancillary(VideoAncillaryDID16::S334Eia608, cc_data);
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if let Err(err) = res {
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gst::error!(CAT, "Failed to add Cea608S3341a metadata: {err}");
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continue;
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}
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let mut elem = BytesStart::new(C608_TAG);
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elem.push_attribute((LINE_ATTR, format!("{}", cc_meta.data()[0]).as_str()));
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xml_writer.write_event(Event::Start(elem)).unwrap();
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self.write_v210_base64(&mut xml_writer);
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xml_writer
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.write_event(Event::End(BytesEnd::new(C608_TAG)))
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.unwrap();
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}
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Cea708Cdp => {
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let res = self.add_did16_ancillary(VideoAncillaryDID16::S334Eia708, cc_data);
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if let Err(err) = res {
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gst::error!(CAT, "Failed to add Cea708Cdp metadata: {err}");
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continue;
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}
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let mut elem = BytesStart::new(C708_TAG);
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elem.push_attribute((LINE_ATTR, DEFAULT_LINE_C708_STR));
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xml_writer.write_event(Event::Start(elem)).unwrap();
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self.write_v210_base64(&mut xml_writer);
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xml_writer
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.write_event(Event::End(BytesEnd::new(C708_TAG)))
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.unwrap();
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}
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other => {
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gst::info!(CAT, "{}", NDICCError::UnsupportedCC { cc_type: other });
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}
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}
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}
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// # Safety
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// `writer` content is guaranteed to be a C compatible String without interior 0 since:
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// * It contains ASCII XML tags, ASCII XML attributes and base64 encoded content
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// * ASCII & base64 are subsets of UTF-8.
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unsafe {
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let cc_meta = xml_writer.into_inner();
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if cc_meta.is_empty() {
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return None;
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}
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Some(CString::from_vec_unchecked(cc_meta))
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}
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}
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fn add_did16_ancillary(&mut self, did16: VideoAncillaryDID16, data: &[u8]) -> Result<()> {
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self.v210_encoder.add_did16_ancillary(
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gst_video::VideoAFDDescriptionMode::Component,
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did16,
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data,
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)?;
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Ok(())
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}
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/// Encodes previously added data as v210 in base64 and writes it with the XML writer.
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fn write_v210_base64<W>(&mut self, writer: &mut quick_xml::writer::Writer<W>)
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where
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W: std::io::Write,
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{
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use quick_xml::events::{BytesText, Event};
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let anc_len = self.v210_encoder.write_line(&mut self.line_buf).unwrap();
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assert_eq!(anc_len % 4, 0);
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let mut xml_buf = String::with_capacity(NDI_CC_CONTENT_CAPACITY);
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BASE64.encode_append(&self.line_buf[..anc_len], &mut xml_buf);
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writer
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.write_event(Event::Text(BytesText::from_escaped(xml_buf)))
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.unwrap();
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}
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}
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/// NDI Closed Captions Meta decoder.
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pub struct NDICCMetaDecoder {
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v210_parser: VideoVBIParser,
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width: u32,
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line_buf: Vec<u8>,
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xml_content: SmallVec<[u8; NDI_CC_CONTENT_CAPACITY]>,
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xml_buf: Vec<u8>,
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}
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impl NDICCMetaDecoder {
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pub fn new(width: u32) -> Self {
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let v210_parser = VideoVBIParser::try_new(gst_video::VideoFormat::V210, width).unwrap();
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NDICCMetaDecoder {
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line_buf: vec![0; v210_parser.line_buffer_len()],
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v210_parser,
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width,
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xml_content: SmallVec::<[u8; NDI_CC_CONTENT_CAPACITY]>::new(),
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xml_buf: Vec::with_capacity(NDI_CC_CAPACITY),
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}
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}
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pub fn set_width(&mut self, width: u32) {
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if width != self.width {
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self.v210_parser =
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VideoVBIParser::try_new(gst_video::VideoFormat::V210, width).unwrap();
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self.line_buf = vec![0; self.v210_parser.line_buffer_len()];
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self.width = width;
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}
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}
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/// Decodes the provided NDI metadata string, searching for NDI closed captions
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/// and add them as `VideoCaptionMeta` to the provided `gst::Buffer`.
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pub fn decode(&mut self, input: &str) -> Result<Vec<VideoAncillary>> {
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use quick_xml::events::Event;
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use quick_xml::reader::Reader;
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let mut captions = Vec::new();
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let mut reader = Reader::from_str(input);
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self.xml_buf.clear();
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loop {
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match reader.read_event_into(&mut self.xml_buf)? {
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Event::Eof => break,
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Event::Start(_) => self.xml_content.clear(),
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Event::Text(e) => {
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self.xml_content.extend(
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e.iter().copied().filter(|&b| {
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(b != b' ') && (b != b'\t') && (b != b'\n') && (b != b'\r')
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}),
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);
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}
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Event::End(e) => match e.name().as_ref() {
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C608_TAG_BYTES => match BASE64.decode(self.xml_content.as_slice()) {
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Ok(v210_buf) => match self.parse_for_cea608(&v210_buf) {
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Ok(None) => (),
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Ok(Some(anc)) => {
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captions.push(anc);
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}
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Err(err) => {
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gst::error!(CAT, "Failed to parse NDI C608 metadata: {err}");
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}
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},
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Err(err) => {
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gst::error!(CAT, "Failed to decode NDI C608 metadata: {err}");
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}
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},
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C708_TAG_BYTES => match BASE64.decode(self.xml_content.as_slice()) {
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Ok(v210_buf) => match self.parse_for_cea708(&v210_buf) {
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Ok(None) => (),
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Ok(Some(anc)) => {
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captions.push(anc);
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}
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Err(err) => {
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gst::error!(CAT, "Failed to parse NDI C708 metadata: {err}");
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}
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},
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Err(err) => {
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gst::error!(CAT, "Failed to decode NDI C708 metadata: {err}");
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}
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},
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_ => (),
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},
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_ => {}
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}
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self.xml_buf.clear();
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}
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Ok(captions)
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}
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fn parse_for_cea608(&mut self, input: &[u8]) -> Result<Option<VideoAncillary>> {
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let Some(anc) = self.parse(input)? else {
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return Ok(None);
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};
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if anc.did16() != VideoAncillaryDID16::S334Eia608 {
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bail!(NDICCError::new_unexpected_afd_did(
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anc.did16(),
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VideoAncillaryDID16::S334Eia608,
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));
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}
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if anc.len() != 3 {
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bail!(NDICCError::UnexpectedAfdDataCount {
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found: anc.len() as u8,
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expected: 3,
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});
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}
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Ok(Some(anc))
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}
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fn parse_for_cea708(&mut self, input: &[u8]) -> Result<Option<VideoAncillary>> {
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let Some(anc) = self.parse(input)? else {
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return Ok(None);
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};
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if anc.did16() != VideoAncillaryDID16::S334Eia708 {
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bail!(NDICCError::new_unexpected_afd_did(
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anc.did16(),
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VideoAncillaryDID16::S334Eia708,
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));
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}
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Ok(Some(anc))
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}
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fn parse(&mut self, data: &[u8]) -> Result<Option<VideoAncillary>> {
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if data.is_empty() {
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return Ok(None);
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}
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self.line_buf[0..data.len()].copy_from_slice(data);
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self.line_buf[data.len()..].fill(0);
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self.v210_parser.add_line(self.line_buf.as_slice())?;
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let opt = self.v210_parser.next_ancillary().transpose()?;
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Ok(opt)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use gst_video::VideoCaptionType;
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#[test]
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fn encode_gst_meta_c608() {
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gst::init().unwrap();
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let mut buf = gst::Buffer::new();
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{
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let buf = buf.get_mut().unwrap();
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gst_video::VideoCaptionMeta::add(
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buf,
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VideoCaptionType::Cea608S3341a,
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&[0x80, 0x94, 0x2c],
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);
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}
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let mut ndi_cc_encoder = NDICCMetaEncoder::new(1920);
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assert_eq!(
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ndi_cc_encoder.encode(&buf).unwrap().as_bytes(),
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b"<C608 line=\"128\">AAAAAP8D8D8AhAUAAgEwIAAABgCUAcASAJgKAAAAAAA=</C608>",
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);
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}
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#[test]
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fn encode_gst_meta_c708() {
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gst::init().unwrap();
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let mut buf = gst::Buffer::new();
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{
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let buf = buf.get_mut().unwrap();
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gst_video::VideoCaptionMeta::add(
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buf,
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VideoCaptionType::Cea708Cdp,
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&[
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0x96, 0x69, 0x55, 0x3f, 0x43, 0x00, 0x00, 0x72, 0xf8, 0xfc, 0x94, 0x2c, 0xf9,
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0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00,
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0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00,
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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, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00,
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0xfa, 0x00, 0x00, 0x74, 0x00, 0x00, 0x1b,
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],
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);
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}
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let mut ndi_cc_encoder = NDICCMetaEncoder::new(1920);
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assert_eq!(
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ndi_cc_encoder.encode(&buf).unwrap().as_bytes(),
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b"<C708 line=\"10\">AAAAAP8D8D8AhAUAAQFQJQBYCgBpAlAlAPwIAEMBACAAAAgAcgKAHwDwCwCUAcASAOQLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADQCQAAAgAgAGwIALcCAAAAAAAAAAAAAA==</C708>",
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);
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}
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#[test]
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fn encode_gst_meta_c608_and_c708() {
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gst::init().unwrap();
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let mut buf = gst::Buffer::new();
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{
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let buf = buf.get_mut().unwrap();
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gst_video::VideoCaptionMeta::add(
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buf,
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VideoCaptionType::Cea608S3341a,
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&[0x80, 0x94, 0x2c],
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);
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gst_video::VideoCaptionMeta::add(
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buf,
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VideoCaptionType::Cea708Cdp,
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&[
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0x96, 0x69, 0x55, 0x3f, 0x43, 0x00, 0x00, 0x72, 0xf8, 0xfc, 0x94, 0x2c, 0xf9,
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0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00,
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0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00,
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|
0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa,
|
|
0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00,
|
|
0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00,
|
|
0xfa, 0x00, 0x00, 0x74, 0x00, 0x00, 0x1b,
|
|
],
|
|
);
|
|
}
|
|
|
|
let mut ndi_cc_encoder = NDICCMetaEncoder::new(1920);
|
|
assert_eq!(
|
|
ndi_cc_encoder.encode(&buf).unwrap().as_bytes(),
|
|
b"<C608 line=\"128\">AAAAAP8D8D8AhAUAAgEwIAAABgCUAcASAJgKAAAAAAA=</C608><C708 line=\"10\">AAAAAP8D8D8AhAUAAQFQJQBYCgBpAlAlAPwIAEMBACAAAAgAcgKAHwDwCwCUAcASAOQLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADQCQAAAgAgAGwIALcCAAAAAAAAAAAAAA==</C708>",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn encode_gst_meta_unsupported_cc() {
|
|
gst::init().unwrap();
|
|
|
|
let mut buf = gst::Buffer::new();
|
|
{
|
|
let buf = buf.get_mut().unwrap();
|
|
gst_video::VideoCaptionMeta::add(
|
|
buf,
|
|
VideoCaptionType::Cea708Raw,
|
|
// Content doesn't matter here
|
|
&[0x00, 0x01, 0x02, 0x03, 0x04, 0x05],
|
|
);
|
|
}
|
|
|
|
let mut ndi_cc_encoder = NDICCMetaEncoder::new(1920);
|
|
assert!(ndi_cc_encoder.encode(&buf).is_none());
|
|
}
|
|
|
|
#[test]
|
|
fn encode_gst_meta_none() {
|
|
gst::init().unwrap();
|
|
|
|
let buf = gst::Buffer::new();
|
|
let mut ndi_cc_encoder = NDICCMetaEncoder::new(1920);
|
|
assert!(ndi_cc_encoder.encode(&buf).is_none());
|
|
}
|
|
|
|
#[test]
|
|
fn decode_ndi_meta_c608() {
|
|
gst::init().unwrap();
|
|
|
|
let mut ndi_cc_decoder = NDICCMetaDecoder::new(1920);
|
|
let captions = ndi_cc_decoder
|
|
.decode("<C608 line=\"128\">AAAAAP8D8D8AhAUAAgEwIAAABgCUAcASAJgKAAAAAAA=</C608>")
|
|
.unwrap();
|
|
|
|
assert_eq!(captions.len(), 1);
|
|
assert_eq!(
|
|
captions[0].did16(),
|
|
gst_video::VideoAncillaryDID16::S334Eia608
|
|
);
|
|
assert_eq!(captions[0].data(), [0x80, 0x94, 0x2c]);
|
|
}
|
|
|
|
#[test]
|
|
fn decode_ndi_meta_c708() {
|
|
gst::init().unwrap();
|
|
|
|
let mut ndi_cc_decoder = NDICCMetaDecoder::new(1920);
|
|
let captions = ndi_cc_decoder.decode(
|
|
"<C708 line=\"10\">AAAAAP8D8D8AhAUAAQFQJQBYCgBpAlAlAPwIAEMBACAAAAgAcgKAHwDwCwCUAcASAOQLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADQCQAAAgAgAGwIALcCAAAAAAAAAAAAAA==</C708>",
|
|
)
|
|
.unwrap();
|
|
|
|
assert_eq!(captions.len(), 1);
|
|
assert_eq!(
|
|
captions[0].did16(),
|
|
gst_video::VideoAncillaryDID16::S334Eia708
|
|
);
|
|
assert_eq!(
|
|
captions[0].data(),
|
|
[
|
|
0x96, 0x69, 0x55, 0x3f, 0x43, 0x00, 0x00, 0x72, 0xf8, 0xfc, 0x94, 0x2c, 0xf9, 0x00,
|
|
0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa,
|
|
0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00,
|
|
0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00,
|
|
0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa,
|
|
0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0x74, 0x00, 0x00,
|
|
0x1b,
|
|
]
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn decode_ndi_meta_c708_newlines_and_indent() {
|
|
gst::init().unwrap();
|
|
|
|
let mut ndi_cc_decoder = NDICCMetaDecoder::new(1920);
|
|
let captions = ndi_cc_decoder
|
|
.decode(
|
|
r#"<C708 line=\"10\">
|
|
AAAAAP8D8D8AhAUAAQFQJQBYCgBpAlAlAPwIAEMBACAAAAgAcgKAHwDwCwCUAcASAOQ
|
|
LAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAA
|
|
ACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACA
|
|
CAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA
|
|
6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADQCQAAAgAgAGwIALcCAAAAAAA
|
|
AAAAAAA==
|
|
</C708>"#,
|
|
)
|
|
.unwrap();
|
|
|
|
assert_eq!(captions.len(), 1);
|
|
assert_eq!(
|
|
captions[0].did16(),
|
|
gst_video::VideoAncillaryDID16::S334Eia708
|
|
);
|
|
assert_eq!(
|
|
captions[0].data(),
|
|
[
|
|
0x96, 0x69, 0x55, 0x3f, 0x43, 0x00, 0x00, 0x72, 0xf8, 0xfc, 0x94, 0x2c, 0xf9, 0x00,
|
|
0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa,
|
|
0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00,
|
|
0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00,
|
|
0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa,
|
|
0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0x74, 0x00, 0x00,
|
|
0x1b,
|
|
]
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn decode_ndi_meta_c608_newlines_spaces_inline() {
|
|
gst::init().unwrap();
|
|
|
|
let mut ndi_cc_decoder = NDICCMetaDecoder::new(1920);
|
|
let captions = ndi_cc_decoder.decode(
|
|
"<C608 line=\"128\">\n\tAAAAAP8D8\n\n\r D8AhAUA\r\n\tAgEwIAAABgCUAcASAJgKAAAAAAA= \n</C608>",
|
|
)
|
|
.unwrap();
|
|
|
|
assert_eq!(captions.len(), 1);
|
|
assert_eq!(
|
|
captions[0].did16(),
|
|
gst_video::VideoAncillaryDID16::S334Eia608
|
|
);
|
|
assert_eq!(captions[0].data(), [0x80, 0x94, 0x2c]);
|
|
}
|
|
|
|
#[test]
|
|
fn decode_ndi_meta_c608_and_c708() {
|
|
gst::init().unwrap();
|
|
|
|
let mut ndi_cc_decoder = NDICCMetaDecoder::new(1920);
|
|
let captions = ndi_cc_decoder.decode(
|
|
"<C608 line=\"128\">AAAAAP8D8D8AhAUAAgEwIAAABgCUAcASAJgKAAAAAAA=</C608><C708 line=\"10\">AAAAAP8D8D8AhAUAAQFQJQBYCgBpAlAlAPwIAEMBACAAAAgAcgKAHwDwCwCUAcASAOQLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADoCwAAAgAgAOgLAAACACAA6AsAAAIAIADQCQAAAgAgAGwIALcCAAAAAAAAAAAAAA==</C708>",
|
|
)
|
|
.unwrap();
|
|
|
|
assert_eq!(captions.len(), 2);
|
|
assert_eq!(
|
|
captions[0].did16(),
|
|
gst_video::VideoAncillaryDID16::S334Eia608
|
|
);
|
|
assert_eq!(captions[0].data(), [0x80, 0x94, 0x2c]);
|
|
|
|
assert_eq!(
|
|
captions[1].did16(),
|
|
gst_video::VideoAncillaryDID16::S334Eia708
|
|
);
|
|
assert_eq!(
|
|
captions[1].data(),
|
|
[
|
|
0x96, 0x69, 0x55, 0x3f, 0x43, 0x00, 0x00, 0x72, 0xf8, 0xfc, 0x94, 0x2c, 0xf9, 0x00,
|
|
0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa,
|
|
0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00,
|
|
0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00,
|
|
0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa,
|
|
0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0xfa, 0x00, 0x00, 0x74, 0x00, 0x00,
|
|
0x1b,
|
|
]
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn decode_ndi_meta_tag_mismatch() {
|
|
gst::init().unwrap();
|
|
|
|
// Expecting </C608> found </C708>'
|
|
let mut ndi_cc_decoder = NDICCMetaDecoder::new(1920);
|
|
ndi_cc_decoder
|
|
.decode("<C608 line=\"128\">AAAAAP8D8D8AhAUAAgEwIAAABgCUAcASAJgKAAAAAAA=</C708>")
|
|
.unwrap_err();
|
|
}
|
|
}
|