mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-11-22 11:30:59 +00:00
rtp: add mp4gdepay
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1551>
This commit is contained in:
François Laignel
GStreamer Marge Bot
parent
5466cafc24
commit
b588ee59bc
12 changed files with 3396 additions and 3 deletions
1
Cargo.lock
generated
1
Cargo.lock
generated
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@ -2719,6 +2719,7 @@ dependencies = [
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"once_cell",
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"rand",
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"rtp-types",
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"slab",
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"smallvec",
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"thiserror",
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"time",
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@ -6977,6 +6977,32 @@
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},
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"rank": "marginal"
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},
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"rtpmp4gdepay2": {
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"author": "François Laignel <francois centricular com>",
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"description": "Depayload MPEG-4 Generic elementary streams from RTP packets (RFC 3640)",
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"hierarchy": [
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"GstRtpMpeg4GenericDepay",
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"GstRtpBaseDepay2",
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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": "Codec/Depayloader/Network/RTP",
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"pad-templates": {
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"sink": {
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"caps": "application/x-rtp:\n media: { (string)audio, (string)video }\n clock-rate: [ 1, 2147483647 ]\n encoding-name: MPEG4-GENERIC\n mode: { (string)generic, (string)AAC-lbr, (string)AAC-hbr, (string)aac-hbr }\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": "video/mpeg:\n mpegversion: 4\n systemstream: false\naudio/mpeg:\n mpegversion: 4\n stream-format: raw\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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"rank": "marginal"
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},
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"rtppcmadepay2": {
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"author": "Sebastian Dröge <sebastian@centricular.com>",
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"description": "Depayload A-law from RTP packets (RFC 3551)",
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@ -22,6 +22,7 @@ hex = "0.4.3"
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once_cell.workspace = true
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rand = { version = "0.8", default-features = false, features = ["std", "std_rng" ] }
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rtp-types = { version = "0.1" }
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slab = "0.4.9"
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smallvec = { version = "1.11", features = ["union", "write", "const_generics", "const_new"] }
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thiserror = "1"
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time = { version = "0.3", default-features = false, features = ["std"] }
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@ -16,6 +16,9 @@
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*/
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use gst::glib;
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#[macro_use]
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mod utils;
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mod gcc;
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mod audio_discont;
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@ -26,6 +29,7 @@ mod basepay;
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mod av1;
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mod mp2t;
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mod mp4a;
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mod mp4g;
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mod pcmau;
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mod vp8;
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mod vp9;
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@ -33,8 +37,6 @@ mod vp9;
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#[cfg(test)]
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mod tests;
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mod utils;
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fn plugin_init(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
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gcc::register(plugin)?;
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@ -59,6 +61,8 @@ fn plugin_init(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
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mp4a::depay::register(plugin)?;
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mp4a::pay::register(plugin)?;
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mp4g::depay::register(plugin)?;
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pcmau::depay::register(plugin)?;
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pcmau::pay::register(plugin)?;
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748
net/rtp/src/mp4g/depay/deint_buf.rs
Normal file
748
net/rtp/src/mp4g/depay/deint_buf.rs
Normal file
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@ -0,0 +1,748 @@
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//! Access Unit Deinterleaving Buffer
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use slab::Slab;
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use super::{AccessUnit, AccessUnitIndex, MaybeSingleAuOrList, Mpeg4GenericDepayError};
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#[derive(Debug)]
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struct AuNode {
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au: AccessUnit,
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/// Index of the next AuNode in the early_aus buffer
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next: Option<usize>,
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}
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/// Access Unit Deinterleaving Buffer.
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///
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/// In some packet modes, non-consecutive AUs might be grouped together,
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/// which can limit the gap between to AUs in case of packet loss.
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///
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/// The Deinterleaving Buffer collects AUs as they arrive and outputs
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/// them in the expected order whenever possible.
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///
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/// See [Interleaving in RFC 3640](rfc-interleaving).
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///
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/// [rfc-interleaving]: https://www.rfc-editor.org/rfc/rfc3640.html#section-3.2.3.2
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#[derive(Debug, Default)]
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pub struct DeinterleaveAuBuffer {
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/// Linked list of the early AUs
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early_aus: Slab<AuNode>,
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/// Index of the head in early_aus buffer
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head: Option<usize>,
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expected_index: Option<AccessUnitIndex>,
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}
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impl DeinterleaveAuBuffer {
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pub fn new(max_displacement: u32) -> Self {
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DeinterleaveAuBuffer {
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early_aus: Slab::with_capacity(max_displacement as usize),
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..Default::default()
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}
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}
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pub fn drain(&mut self) -> MaybeSingleAuOrList {
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self.expected_index = None;
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let mut cur_opt = self.head.take();
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let len = self.early_aus.len();
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match len {
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0 => return MaybeSingleAuOrList::default(),
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1 => {
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let node = self.early_aus.remove(cur_opt.unwrap());
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return MaybeSingleAuOrList::from(node.au);
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}
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_ => (),
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}
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let mut list = MaybeSingleAuOrList::new_list(len);
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while let Some(cur) = cur_opt {
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let cur_node = self.early_aus.remove(cur);
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list.push(cur_node.au);
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cur_opt = cur_node.next;
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}
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list
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}
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pub fn flush(&mut self) {
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self.early_aus.clear();
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self.head = None;
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self.expected_index = None;
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}
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#[track_caller]
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pub fn push_and_pop(
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&mut self,
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au: AccessUnit,
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outbuf: &mut MaybeSingleAuOrList,
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) -> Result<(), Mpeg4GenericDepayError> {
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use std::cmp::Ordering::*;
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let mut expected_index = match self.expected_index {
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Some(expected_index) => match au.index.try_cmp(expected_index)? {
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Equal => expected_index,
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Greater => return self.insert_au(au),
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Less => {
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// Dropping too early Au
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return Err(Mpeg4GenericDepayError::TooEarlyAU {
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index: au.index,
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expected_index,
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});
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}
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},
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None => au.index, // first AU
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};
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outbuf.push(au);
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expected_index += 1;
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self.expected_index = Some(expected_index);
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// Pop other ready AUs if any
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let mut head;
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let mut head_node_ref;
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let mut head_node;
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while !self.early_aus.is_empty() {
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head = self.head.expect("!early_aus.is_empty");
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head_node_ref = self.early_aus.get(head).unwrap();
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if head_node_ref.au.index.try_cmp(expected_index)?.is_ne() {
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break;
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}
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head_node = self.early_aus.remove(head);
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outbuf.push(head_node.au);
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expected_index += 1;
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self.expected_index = Some(expected_index);
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self.head = head_node.next;
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}
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Ok(())
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}
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fn insert_au(&mut self, au: AccessUnit) -> Result<(), Mpeg4GenericDepayError> {
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use std::cmp::Ordering::*;
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if self.early_aus.is_empty() {
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self.head = Some(self.early_aus.insert(AuNode { au, next: None }));
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// Nothing to pop
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return Ok(());
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}
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let mut cur = self.head.expect("!early_aus.is_empty");
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let mut cur_node = self.early_aus.get(cur).unwrap();
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// cur & cur_node refer to current head here
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match au.index.try_cmp(cur_node.au.index)? {
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Greater => (),
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Less => {
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// New head
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self.head = Some(self.early_aus.insert(AuNode {
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au,
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next: Some(cur),
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}));
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return Ok(());
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}
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Equal => {
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// Duplicate
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// RFC, §2.3:
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// > In addition, an AU MUST NOT be repeated in other RTP packets; hence
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// > repetition of an AU is only possible when using a duplicate RTP packet.
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//
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// But: we can't received duplicates because they would have been rejected
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// by the base class or the jitterbuffer.
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unreachable!();
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}
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}
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// Upcoming AU is not then new head
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loop {
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let Some(next) = cur_node.next else {
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let new = Some(self.early_aus.insert(AuNode { au, next: None }));
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self.early_aus.get_mut(cur).unwrap().next = new;
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return Ok(());
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};
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let next_node = self.early_aus.get(next).unwrap();
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match au.index.try_cmp(next_node.au.index)? {
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Greater => (), // try next node
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Less => {
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let new = self.early_aus.insert(AuNode {
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au,
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next: Some(next),
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});
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self.early_aus.get_mut(cur).unwrap().next = Some(new);
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return Ok(());
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}
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Equal => {
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// Duplicate
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// RFC, §2.3:
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// > In addition, an AU MUST NOT be repeated in other RTP packets; hence
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// > repetition of an AU is only possible when using a duplicate RTP packet.
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//
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// But: we can't received duplicates because they would have been rejected
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// by the base class or the jitterbuffer.
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unreachable!();
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}
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}
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cur = next;
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cur_node = next_node;
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}
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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 crate::mp4g::depay::SingleAuOrList;
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impl From<u32> for AccessUnit {
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fn from(index: u32) -> Self {
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AccessUnit {
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index: index.into(),
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..Default::default()
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}
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}
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}
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#[test]
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fn simple_group_interleave() {
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// Tests the pattern illustrated in:
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// https://www.rfc-editor.org/rfc/rfc3640.html#appendix-A.3
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gst::init().unwrap();
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let mut deint_buf = DeinterleaveAuBuffer::default();
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assert!(deint_buf.early_aus.is_empty());
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assert!(deint_buf.expected_index.is_none());
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let mut outbuf = MaybeSingleAuOrList::default();
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assert!(outbuf.0.is_none());
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// ****
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// * P0. AUs with indices: 0, 3 & 6
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// Expected AU 0 so it is pushed to outbuf
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deint_buf.push_and_pop(0.into(), &mut outbuf).unwrap();
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assert!(deint_buf.early_aus.is_empty());
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assert_eq!(deint_buf.expected_index.unwrap(), 1);
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matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
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// Expected AU 1 is missing when pushing AU 3 so it is buffered
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deint_buf.push_and_pop(3.into(), &mut outbuf).unwrap();
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assert_eq!(deint_buf.early_aus.len(), 1);
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assert_eq!(deint_buf.expected_index.unwrap(), 1);
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matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
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// Expected AU 1 is missing when pushing AU 6 so it is buffered
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deint_buf.push_and_pop(6.into(), &mut outbuf).unwrap();
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assert_eq!(deint_buf.early_aus.len(), 2);
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assert_eq!(deint_buf.expected_index.unwrap(), 1);
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// End of the RTP packet
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matches!(outbuf.take(), Some(SingleAuOrList::Single(_)));
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assert!(outbuf.0.is_none());
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// ****
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// * P1. AUs with indices: 1, 4 & 7
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// Expected AU 1 so it is pushed to outbuf
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deint_buf.push_and_pop(1.into(), &mut outbuf).unwrap();
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assert_eq!(deint_buf.early_aus.len(), 2);
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assert_eq!(deint_buf.expected_index.unwrap(), 2);
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matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
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// Expected AU 2 is missing when pushing AU 4 so it is buffered
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deint_buf.push_and_pop(4.into(), &mut outbuf).unwrap();
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assert_eq!(deint_buf.early_aus.len(), 3);
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assert_eq!(deint_buf.expected_index.unwrap(), 2);
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matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
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// Expected AU 2 is missing when pushing AU 7 so it is buffered
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deint_buf.push_and_pop(7.into(), &mut outbuf).unwrap();
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assert_eq!(deint_buf.early_aus.len(), 4);
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assert_eq!(deint_buf.expected_index.unwrap(), 2);
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// End of the RTP packet
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matches!(outbuf.take(), Some(SingleAuOrList::Single(_)));
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assert!(outbuf.0.is_none());
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// ****
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// * P2. AUs with indices: 2, 5 & 8
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// Expected AU 2 so it is pushed to outbuf
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// and this also pops AUs 3 & 4
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// Remaining: 6 & 7
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deint_buf.push_and_pop(2.into(), &mut outbuf).unwrap();
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assert_eq!(deint_buf.early_aus.len(), 2);
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assert_eq!(deint_buf.expected_index.unwrap(), 5);
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let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
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panic!("Expecting a List");
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};
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assert_eq!(buflist.len(), 3);
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// Expected AU 5 so it is pushed to outbuf
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// and this also pops AUs 6 & 7
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deint_buf.push_and_pop(5.into(), &mut outbuf).unwrap();
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assert!(deint_buf.early_aus.is_empty());
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assert_eq!(deint_buf.expected_index.unwrap(), 8);
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let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
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panic!("Expecting a List");
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};
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assert_eq!(buflist.len(), 6);
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// Expected AU 8 so it is pushed to outbuf
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deint_buf.push_and_pop(8.into(), &mut outbuf).unwrap();
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assert!(deint_buf.early_aus.is_empty());
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assert_eq!(deint_buf.expected_index.unwrap(), 9);
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// End of the RTP packet
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let Some(SingleAuOrList::List(ref buflist)) = outbuf.take() else {
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panic!("Expecting a List");
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};
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assert_eq!(buflist.len(), 7);
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assert!(outbuf.0.is_none());
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// ****
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// * P3. AUs with indices: 9, 12 & 15
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// Expected AU 9 so it is pushed to outbuf
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deint_buf.push_and_pop(9.into(), &mut outbuf).unwrap();
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assert!(deint_buf.early_aus.is_empty());
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assert_eq!(deint_buf.expected_index.unwrap(), 10);
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matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
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// Expected AU 10 is missing when pushing AU 12 so it is buffered
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deint_buf.push_and_pop(12.into(), &mut outbuf).unwrap();
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assert_eq!(deint_buf.early_aus.len(), 1);
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assert_eq!(deint_buf.expected_index.unwrap(), 10);
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matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
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// Expected AU 10 is missing when pushing AU 15 so it is buffered
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deint_buf.push_and_pop(15.into(), &mut outbuf).unwrap();
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assert_eq!(deint_buf.early_aus.len(), 2);
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assert_eq!(deint_buf.expected_index.unwrap(), 10);
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// End of the RTP packet
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matches!(outbuf.take(), Some(SingleAuOrList::Single(_)));
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assert!(outbuf.0.is_none());
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}
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#[test]
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fn more_subtle_group_interleave() {
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// Tests the pattern illustrated in:
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// https://www.rfc-editor.org/rfc/rfc3640.html#appendix-A.4
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gst::init().unwrap();
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let mut deint_buf = DeinterleaveAuBuffer::default();
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let mut outbuf = MaybeSingleAuOrList::default();
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// ****
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// * P0. AUs with indices: 0 & 5
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// Expected AU 0 so it is pushed to outbuf
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deint_buf.push_and_pop(0.into(), &mut outbuf).unwrap();
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assert!(deint_buf.early_aus.is_empty());
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assert_eq!(deint_buf.expected_index.unwrap(), 1);
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matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
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// Expected AU 1 is missing when pushing AU 5 so it is buffered
|
||||
deint_buf.push_and_pop(5.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 1);
|
||||
|
||||
// End of the RTP packet
|
||||
matches!(outbuf.take(), Some(SingleAuOrList::Single(_)));
|
||||
assert!(outbuf.0.is_none());
|
||||
|
||||
// ****
|
||||
// * P1. AUs with indices: 2 & 7
|
||||
|
||||
// Expected AU 1 is missing when pushing AU 2 so it is buffered
|
||||
deint_buf.push_and_pop(2.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 2);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 1);
|
||||
assert!(outbuf.0.is_none());
|
||||
|
||||
// Expected AU 1 is missing when pushing AU 7 so it is buffered
|
||||
deint_buf.push_and_pop(7.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 3);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 1);
|
||||
|
||||
// End of the RTP packet
|
||||
assert!(outbuf.take().is_none());
|
||||
|
||||
// ****
|
||||
// * P2. AUs with indices: 4 & 9
|
||||
|
||||
// Expected AU 1 is missing when pushing AU 4 so it is buffered
|
||||
deint_buf.push_and_pop(4.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 4);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 1);
|
||||
assert!(outbuf.0.is_none());
|
||||
|
||||
// Expected AU 1 is missing when pushing AU 9 so it is buffered
|
||||
deint_buf.push_and_pop(9.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 5);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 1);
|
||||
|
||||
// End of the RTP packet
|
||||
assert!(outbuf.take().is_none());
|
||||
|
||||
// ****
|
||||
// * P3. AUs with indices: 1 & 6
|
||||
|
||||
// Expected AU 1 so it is pushed to outbuf
|
||||
// and this also pops AU 2
|
||||
// Remaining: 4, 5, 7 & 9
|
||||
deint_buf.push_and_pop(1.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 4);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 3);
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 2);
|
||||
|
||||
// Expected AU 3 is missing when pushing AU 6 so it is buffered
|
||||
deint_buf.push_and_pop(6.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 5);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 3);
|
||||
|
||||
// End of the RTP packet
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.take() else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 2);
|
||||
assert!(outbuf.0.is_none());
|
||||
|
||||
// ****
|
||||
// * P4. AUs with indices: 3 & 8
|
||||
|
||||
// Expected AU 3 so it is pushed to outbuf
|
||||
// and this also pops AU 4, 5, 6 & 7
|
||||
// Remaining: 9
|
||||
deint_buf.push_and_pop(3.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 8);
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 5);
|
||||
|
||||
// Expected AU 8 so it is pushed to outbuf
|
||||
// and this also pops AU 9
|
||||
deint_buf.push_and_pop(8.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert!(deint_buf.early_aus.is_empty());
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 10);
|
||||
|
||||
// End of the RTP packet
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.take() else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 7);
|
||||
assert!(outbuf.0.is_none());
|
||||
|
||||
// ****
|
||||
// * P5. AUs with indices: 10 & 15
|
||||
|
||||
// Expected AU 10 so it is pushed to outbuf
|
||||
deint_buf.push_and_pop(10.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert!(deint_buf.early_aus.is_empty());
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 11);
|
||||
matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
|
||||
|
||||
// Expected AU 11 is missing when pushing AU 15 so it is buffered
|
||||
deint_buf.push_and_pop(15.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 11);
|
||||
|
||||
// End of the RTP packet
|
||||
matches!(outbuf.take(), Some(SingleAuOrList::Single(_)));
|
||||
assert!(outbuf.0.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn continuous_interleave() {
|
||||
// Tests the pattern illustrated in:
|
||||
// https://www.rfc-editor.org/rfc/rfc3640.html#appendix-A.5
|
||||
|
||||
gst::init().unwrap();
|
||||
|
||||
let mut deint_buf = DeinterleaveAuBuffer::default();
|
||||
let mut outbuf = MaybeSingleAuOrList::default();
|
||||
|
||||
// ****
|
||||
// * P0. AUs with index: 0
|
||||
|
||||
// Expected AU 0 so it is pushed to outbuf
|
||||
deint_buf.push_and_pop(0.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert!(deint_buf.early_aus.is_empty());
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 1);
|
||||
|
||||
// End of the RTP packet
|
||||
matches!(outbuf.take(), Some(SingleAuOrList::Single(_)));
|
||||
assert!(outbuf.0.is_none());
|
||||
|
||||
// ****
|
||||
// * P1. AUs with indices: 1 & 4
|
||||
|
||||
// Expected AU 0 so it is pushed to outbuf
|
||||
deint_buf.push_and_pop(1.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert!(deint_buf.early_aus.is_empty());
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 2);
|
||||
matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
|
||||
|
||||
// Expected AU 2 is missing when pushing AU 4 so it is buffered
|
||||
deint_buf.push_and_pop(4.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 2);
|
||||
|
||||
// End of the RTP packet
|
||||
matches!(outbuf.take(), Some(SingleAuOrList::Single(_)));
|
||||
assert!(outbuf.take().is_none());
|
||||
|
||||
// ****
|
||||
// * P2. AUs with indices: 2, 5 & 8
|
||||
|
||||
// Expected AU 2 so it is pushed to outbuf
|
||||
deint_buf.push_and_pop(2.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 3);
|
||||
matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
|
||||
|
||||
// Expected AU 3 is missing when pushing AU 5 so it is buffered
|
||||
deint_buf.push_and_pop(5.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 2);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 3);
|
||||
matches!(outbuf.0, Some(SingleAuOrList::Single(_)));
|
||||
|
||||
// Expected AU 3 is missing when pushing AU 8 so it is buffered
|
||||
deint_buf.push_and_pop(8.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 3);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 3);
|
||||
|
||||
// End of the RTP packet
|
||||
matches!(outbuf.take(), Some(SingleAuOrList::Single(_)));
|
||||
assert!(outbuf.take().is_none());
|
||||
|
||||
// ****
|
||||
// * P3. AUs with indices: 3, 6, 9 & 12
|
||||
|
||||
// Expected AU 3 so it is pushed to outbuf
|
||||
// and this also pops AU 4 & 5
|
||||
// Remaining: 8
|
||||
deint_buf.push_and_pop(3.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 6);
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 3);
|
||||
|
||||
// Expected AU 6 so it is pushed to outbuf
|
||||
deint_buf.push_and_pop(6.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 7);
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 4);
|
||||
|
||||
// Expected AU 7 is missing when pushing AU 9 so it is buffered
|
||||
deint_buf.push_and_pop(9.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 2);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 7);
|
||||
matches!(outbuf.0, Some(SingleAuOrList::List(_)));
|
||||
|
||||
// Expected AU 7 is missing when pushing AU 12 so it is buffered
|
||||
deint_buf.push_and_pop(12.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 3);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 7);
|
||||
|
||||
// End of the RTP packet
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.take() else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 4);
|
||||
assert!(outbuf.0.is_none());
|
||||
|
||||
// ****
|
||||
// * P4. AUs with indices: 7, 10, 13 & 16
|
||||
|
||||
// Expected AU 7 so it is pushed to outbuf
|
||||
// and this also pops AU 8 & 9
|
||||
// Remaining: 12
|
||||
deint_buf.push_and_pop(7.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 10);
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 3);
|
||||
|
||||
// Expected AU 10 so it is pushed to outbuf
|
||||
deint_buf.push_and_pop(10.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 11);
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 4);
|
||||
|
||||
// Expected AU 11 is missing when pushing AU 13 so it is buffered
|
||||
deint_buf.push_and_pop(13.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 2);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 11);
|
||||
matches!(outbuf.0, Some(SingleAuOrList::List(_)));
|
||||
|
||||
// Expected AU 11 is missing when pushing AU 16 so it is buffered
|
||||
deint_buf.push_and_pop(16.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 3);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 11);
|
||||
|
||||
// End of the RTP packet
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.take() else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 4);
|
||||
assert!(outbuf.0.is_none());
|
||||
|
||||
// ****
|
||||
// * P5. AUs with indices: 11, 14, 17 & 20
|
||||
|
||||
// Expected AU 11 so it is pushed to outbuf
|
||||
// and this also pops AU 12 & 13
|
||||
// Remaining: 16
|
||||
deint_buf.push_and_pop(11.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 14);
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 3);
|
||||
|
||||
// Expected AU 14 so it is pushed to outbuf
|
||||
deint_buf.push_and_pop(14.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 15);
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 4);
|
||||
|
||||
// Expected AU 15 is missing when pushing AU 17 so it is buffered
|
||||
deint_buf.push_and_pop(17.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 2);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 15);
|
||||
matches!(outbuf.0, Some(SingleAuOrList::List(_)));
|
||||
|
||||
// Expected AU 15 is missing when pushing AU 20 so it is buffered
|
||||
deint_buf.push_and_pop(20.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 3);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 15);
|
||||
|
||||
// End of the RTP packet
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.take() else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 4);
|
||||
assert!(outbuf.0.is_none());
|
||||
|
||||
// ****
|
||||
// * P6. AUs with indices: 15 & 18
|
||||
|
||||
// Expected AU 15 so it is pushed to outbuf
|
||||
// and this also pops AU 16 & 17
|
||||
// Remaining: 20
|
||||
deint_buf.push_and_pop(15.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 18);
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.0 else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 3);
|
||||
|
||||
// Expected AU 18 so it is pushed to outbuf
|
||||
deint_buf.push_and_pop(18.into(), &mut outbuf).unwrap();
|
||||
|
||||
assert_eq!(deint_buf.early_aus.len(), 1);
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 19);
|
||||
|
||||
// End of the RTP packet
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.take() else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 4);
|
||||
assert!(outbuf.0.is_none());
|
||||
|
||||
// ****
|
||||
// * P7. AUs with index: 19
|
||||
deint_buf.push_and_pop(19.into(), &mut outbuf).unwrap();
|
||||
|
||||
// Expected AU 19 so it is pushed to outbuf
|
||||
// and this also pops AU 20
|
||||
assert!(deint_buf.early_aus.is_empty());
|
||||
assert_eq!(deint_buf.expected_index.unwrap(), 21);
|
||||
|
||||
// End of the RTP packet
|
||||
let Some(SingleAuOrList::List(ref buflist)) = outbuf.take() else {
|
||||
panic!("Expecting a List");
|
||||
};
|
||||
assert_eq!(buflist.len(), 2);
|
||||
assert!(outbuf.0.is_none());
|
||||
}
|
||||
}
|
||||
641
net/rtp/src/mp4g/depay/imp.rs
Normal file
641
net/rtp/src/mp4g/depay/imp.rs
Normal file
|
|
@ -0,0 +1,641 @@
|
|||
// GStreamer RTP MPEG-4 Generic elementary streams Depayloader
|
||||
//
|
||||
// Copyright (C) 2023-2024 François Laignel <francois 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
|
||||
|
||||
/**
|
||||
* SECTION:element-rtpmp4gdepay2
|
||||
* @see_also: rtpmp4gpay2, rtpmp4gdepay, rtpmp4gpay
|
||||
*
|
||||
* Depayload an MPEG-4 Generic elementary stream from RTP packets as per [RFC 3640][rfc-3640].
|
||||
*
|
||||
* [rfc-3640]: https://www.rfc-editor.org/rfc/rfc3640.html#section-4
|
||||
*
|
||||
* ## Example pipeline
|
||||
*
|
||||
* |[
|
||||
* gst-launch-1.0 udpsrc caps='application/x-rtp,media=audio,clock-rate=44100,encoding-name=MPEG4-GENERIC,payload=96,encoding-params=1,streamtype=5,profile-level-id=2,mode=AAC-hbr,config=(string)1208,sizelength=13,indexlength=3,indexdeltalength=3' ! rtpjitterbuffer ! rtpmp4gdepay2 ! decodebin3 ! audioconvert ! audioresample ! autoaudiosink
|
||||
* ]| This will depayload an incoming RTP MPEG-4 generic elementary stream AAC-hbr with
|
||||
* 1 channel @ 44100 sampling rate (default `audiotestsrc ! fdkaacenc` negotiation).
|
||||
* You can use the #rtpmp4gpay2 or #rtpmp4gpay elements to create such an RTP stream.
|
||||
*
|
||||
* Since: plugins-rs-0.13.0
|
||||
*/
|
||||
use anyhow::Context;
|
||||
use atomic_refcell::AtomicRefCell;
|
||||
use once_cell::sync::Lazy;
|
||||
|
||||
use gst::{glib, prelude::*, subclass::prelude::*};
|
||||
|
||||
use std::ops::{ControlFlow, RangeInclusive};
|
||||
|
||||
use crate::basedepay::{Packet, PacketToBufferRelation, RtpBaseDepay2Ext, TimestampOffset};
|
||||
|
||||
use crate::mp4g::{ModeConfig, RtpTimestamp};
|
||||
|
||||
use super::parsers::PayloadParser;
|
||||
use super::{
|
||||
AccessUnit, DeinterleaveAuBuffer, MaybeSingleAuOrList, Mpeg4GenericDepayError, SingleAuOrList,
|
||||
};
|
||||
|
||||
static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
|
||||
gst::DebugCategory::new(
|
||||
"rtpmp4gdepay2",
|
||||
gst::DebugColorFlags::empty(),
|
||||
Some("RTP MPEG-4 generic Depayloader"),
|
||||
)
|
||||
});
|
||||
|
||||
#[derive(Default)]
|
||||
pub struct RtpMpeg4GenericDepay {
|
||||
state: AtomicRefCell<State>,
|
||||
}
|
||||
|
||||
#[glib::object_subclass]
|
||||
impl ObjectSubclass for RtpMpeg4GenericDepay {
|
||||
const NAME: &'static str = "GstRtpMpeg4GenericDepay";
|
||||
type Type = super::RtpMpeg4GenericDepay;
|
||||
type ParentType = crate::basedepay::RtpBaseDepay2;
|
||||
}
|
||||
|
||||
impl ObjectImpl for RtpMpeg4GenericDepay {}
|
||||
|
||||
impl GstObjectImpl for RtpMpeg4GenericDepay {}
|
||||
|
||||
impl ElementImpl for RtpMpeg4GenericDepay {
|
||||
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
|
||||
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
|
||||
gst::subclass::ElementMetadata::new(
|
||||
"RTP MPEG-4 Generic ES Depayloader",
|
||||
"Codec/Depayloader/Network/RTP",
|
||||
"Depayload MPEG-4 Generic elementary streams from RTP packets (RFC 3640)",
|
||||
"François Laignel <francois centricular com>",
|
||||
)
|
||||
});
|
||||
|
||||
Some(&*ELEMENT_METADATA)
|
||||
}
|
||||
|
||||
fn pad_templates() -> &'static [gst::PadTemplate] {
|
||||
static PAD_TEMPLATES: Lazy<Vec<gst::PadTemplate>> = Lazy::new(|| {
|
||||
let sink_pad_template = gst::PadTemplate::new(
|
||||
"sink",
|
||||
gst::PadDirection::Sink,
|
||||
gst::PadPresence::Always,
|
||||
&gst::Caps::builder("application/x-rtp")
|
||||
// TODO "application" is also present in rtpmp4gdepay caps template
|
||||
// but it doesn't handle it in gst_rtp_mp4g_depay_setcaps
|
||||
.field("media", gst::List::new(["audio", "video"]))
|
||||
.field("clock-rate", gst::IntRange::new(1i32, i32::MAX))
|
||||
.field("encoding-name", "MPEG4-GENERIC")
|
||||
// Required string params:
|
||||
// "streamtype = { \"4\", \"5\" }, " Not set by Wowza 4 = video, 5 = audio
|
||||
// "profile-level-id = [1,MAX], "
|
||||
// "config = (string)"
|
||||
.field(
|
||||
"mode",
|
||||
gst::List::new(["generic", "AAC-lbr", "AAC-hbr", "aac-hbr"]),
|
||||
)
|
||||
// Optional general parameters:
|
||||
// "objecttype = [1,MAX], "
|
||||
// "constantsize = [1,MAX], " // constant size of each AU
|
||||
// "constantduration = [1,MAX], " // constant duration of each AU
|
||||
// "maxdisplacement = [1,MAX], "
|
||||
// "de-interleavebuffersize = [1,MAX], "
|
||||
// Optional configuration parameters:
|
||||
// "sizelength = [1, 32], "
|
||||
// "indexlength = [1, 32], "
|
||||
// "indexdeltalength = [1, 32], "
|
||||
// "ctsdeltalength = [1, 32], "
|
||||
// "dtsdeltalength = [1, 32], "
|
||||
// "randomaccessindication = {0, 1}, "
|
||||
// "streamstateindication = [0, 32], "
|
||||
// "auxiliarydatasizelength = [0, 32]" )
|
||||
.build(),
|
||||
)
|
||||
.unwrap();
|
||||
|
||||
let src_pad_template = gst::PadTemplate::new(
|
||||
"src",
|
||||
gst::PadDirection::Src,
|
||||
gst::PadPresence::Always,
|
||||
&gst::Caps::builder_full()
|
||||
.structure(
|
||||
gst::Structure::builder("video/mpeg")
|
||||
.field("mpegversion", 4i32)
|
||||
.field("systemstream", false)
|
||||
.build(),
|
||||
)
|
||||
.structure(
|
||||
gst::Structure::builder("audio/mpeg")
|
||||
.field("mpegversion", 4i32)
|
||||
.field("stream-format", "raw")
|
||||
.build(),
|
||||
)
|
||||
.build(),
|
||||
)
|
||||
.unwrap();
|
||||
|
||||
vec![src_pad_template, sink_pad_template]
|
||||
});
|
||||
|
||||
PAD_TEMPLATES.as_ref()
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Default)]
|
||||
struct State {
|
||||
parser: PayloadParser,
|
||||
deint_buf: Option<DeinterleaveAuBuffer>,
|
||||
au_acc: Option<AuAccumulator>,
|
||||
seqnum_base: Option<u32>,
|
||||
clock_rate: u32,
|
||||
can_parse: bool,
|
||||
max_au_index: Option<usize>,
|
||||
prev_au_index: Option<usize>,
|
||||
prev_rtptime: Option<u64>,
|
||||
last_au_index: Option<usize>,
|
||||
}
|
||||
|
||||
impl State {
|
||||
fn flush(&mut self) {
|
||||
self.parser.reset();
|
||||
|
||||
if let Some(deint_buf) = self.deint_buf.as_mut() {
|
||||
deint_buf.flush();
|
||||
}
|
||||
self.can_parse = false;
|
||||
self.max_au_index = None;
|
||||
self.prev_au_index = None;
|
||||
self.prev_rtptime = None;
|
||||
self.last_au_index = None;
|
||||
}
|
||||
}
|
||||
|
||||
struct CodecData;
|
||||
impl CodecData {
|
||||
fn from_caps(s: &gst::StructureRef) -> anyhow::Result<Option<gst::Buffer>> {
|
||||
let conf_str = s.get_optional::<&str>("config").context("config field")?;
|
||||
let Some(conf_str) = conf_str else {
|
||||
return Ok(None);
|
||||
};
|
||||
let data = hex::decode(conf_str).context("decoding config")?;
|
||||
|
||||
Ok(Some(gst::Buffer::from_mut_slice(data)))
|
||||
}
|
||||
}
|
||||
|
||||
/// Accumulates packets for a fragmented AU.
|
||||
///
|
||||
/// Used for packets containing fragments for a single AU.
|
||||
///
|
||||
/// From https://www.rfc-editor.org/rfc/rfc3640.html#section-3.2.3:
|
||||
///
|
||||
/// > The Access Unit Data Section contains an integer number of complete
|
||||
/// > Access Units or a single fragment of one AU.
|
||||
#[derive(Debug)]
|
||||
struct AuAccumulator(AccessUnit);
|
||||
|
||||
impl AuAccumulator {
|
||||
#[inline]
|
||||
fn new(au: AccessUnit) -> Self {
|
||||
AuAccumulator(au)
|
||||
}
|
||||
#[inline]
|
||||
fn try_append(&mut self, mut au: AccessUnit) -> Result<(), Mpeg4GenericDepayError> {
|
||||
use Mpeg4GenericDepayError::*;
|
||||
|
||||
// FIXME add comment about fragments having the same RTP timestamp
|
||||
if self.0.cts_delta.opt_ne(au.cts_delta).unwrap_or(false) {
|
||||
return Err(FragmentedAuRtpTsMismatch {
|
||||
expected: self.0.cts_delta.unwrap(),
|
||||
found: au.cts_delta.unwrap(),
|
||||
ext_seqnum: au.ext_seqnum,
|
||||
});
|
||||
}
|
||||
|
||||
if self.0.dts_delta.opt_ne(au.dts_delta).unwrap_or(false) {
|
||||
// § 3.2.1.1
|
||||
// > The DTS-delta field MUST have the same value
|
||||
// > for all fragments of an Access Unit
|
||||
return Err(FragmentedAuDtsMismatch {
|
||||
expected: self.0.dts_delta.unwrap(),
|
||||
found: au.dts_delta.unwrap(),
|
||||
ext_seqnum: au.ext_seqnum,
|
||||
});
|
||||
}
|
||||
|
||||
self.0.data.append(&mut au.data);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
#[inline]
|
||||
fn try_into_au(self) -> Result<AccessUnit, Mpeg4GenericDepayError> {
|
||||
let au = self.0;
|
||||
if let Some(expected) = au.size {
|
||||
if expected as usize != au.data.len() {
|
||||
return Err(Mpeg4GenericDepayError::FragmentedAuSizeMismatch {
|
||||
expected,
|
||||
found: au.data.len(),
|
||||
ext_seqnum: au.ext_seqnum,
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
Ok(au)
|
||||
}
|
||||
}
|
||||
|
||||
impl crate::basedepay::RtpBaseDepay2Impl for RtpMpeg4GenericDepay {
|
||||
const ALLOWED_META_TAGS: &'static [&'static str] = &["audio", "video"];
|
||||
|
||||
fn stop(&self) -> Result<(), gst::ErrorMessage> {
|
||||
*self.state.borrow_mut() = State::default();
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn drain(&self) -> Result<gst::FlowSuccess, gst::FlowError> {
|
||||
let mut state = self.state.borrow_mut();
|
||||
|
||||
if let Some(ref mut deint_buf) = state.deint_buf {
|
||||
if let Some(aus) = deint_buf.drain().take() {
|
||||
self.finish_buffer_or_list(&state, None, aus)?;
|
||||
}
|
||||
}
|
||||
|
||||
Ok(gst::FlowSuccess::Ok)
|
||||
}
|
||||
|
||||
fn flush(&self) {
|
||||
gst::debug!(CAT, imp: self, "Flushing");
|
||||
self.state.borrow_mut().flush();
|
||||
}
|
||||
|
||||
fn set_sink_caps(&self, caps: &gst::Caps) -> bool {
|
||||
let s = caps.structure(0).unwrap();
|
||||
|
||||
let mode = s.get::<&str>("mode").expect("Required by Caps");
|
||||
if mode.starts_with("CELP") {
|
||||
gst::error!(CAT, imp: self, "{mode} not supported yet");
|
||||
return false;
|
||||
}
|
||||
|
||||
let mut caps_builder = match s.get::<&str>("media").expect("Required by Caps") {
|
||||
"audio" => gst::Caps::builder("audio/mpeg")
|
||||
.field("mpegversion", 4i32)
|
||||
.field("stream-format", "raw"),
|
||||
"video" => gst::Caps::builder("video/mpeg")
|
||||
.field("mpegversion", 4i32)
|
||||
.field("systemstream", false),
|
||||
// TODO handle "application"
|
||||
_ => unreachable!(),
|
||||
};
|
||||
|
||||
let mode_config = match ModeConfig::from_caps(s) {
|
||||
Ok(h) => h,
|
||||
Err(err) => {
|
||||
gst::error!(CAT, imp: self, "Error parsing Header in Caps: {err:#}");
|
||||
return false;
|
||||
}
|
||||
};
|
||||
|
||||
match CodecData::from_caps(s) {
|
||||
Ok(codec_data) => {
|
||||
caps_builder = caps_builder.field("codec_data", codec_data);
|
||||
}
|
||||
Err(err) => {
|
||||
gst::error!(CAT, imp: self, "Error parsing Caps: {err:#}");
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
let clock_rate = s.get::<i32>("clock-rate").expect("Required by Caps");
|
||||
debug_assert!(clock_rate.is_positive()); // constrained by Caps
|
||||
let clock_rate = clock_rate as u32;
|
||||
|
||||
{
|
||||
let mut state = self.state.borrow_mut();
|
||||
state.seqnum_base = s.get_optional::<u32>("seqnum-base").unwrap();
|
||||
if let Some(seqnum_base) = state.seqnum_base {
|
||||
gst::info!(CAT, imp: self, "Got seqnum_base {seqnum_base}");
|
||||
}
|
||||
state.clock_rate = clock_rate;
|
||||
|
||||
if let Some(max_displacement) = mode_config.max_displacement() {
|
||||
state.deint_buf = Some(DeinterleaveAuBuffer::new(max_displacement));
|
||||
}
|
||||
|
||||
state.parser.set_config(mode_config);
|
||||
}
|
||||
|
||||
self.obj().set_src_caps(&caps_builder.build());
|
||||
|
||||
true
|
||||
}
|
||||
|
||||
fn handle_packet(
|
||||
&self,
|
||||
packet: &crate::basedepay::Packet,
|
||||
) -> Result<gst::FlowSuccess, gst::FlowError> {
|
||||
let mut state = self.state.borrow_mut();
|
||||
|
||||
if self.check_initial_packet(&mut state, packet).is_break() {
|
||||
self.obj().drop_packets(..=packet.ext_seqnum());
|
||||
return Ok(gst::FlowSuccess::Ok);
|
||||
}
|
||||
|
||||
let State {
|
||||
parser,
|
||||
au_acc,
|
||||
deint_buf,
|
||||
..
|
||||
} = &mut *state;
|
||||
|
||||
let payload = packet.payload();
|
||||
let ext_seqnum = packet.ext_seqnum();
|
||||
let packet_ts = RtpTimestamp::from_ext(packet.ext_timestamp());
|
||||
let au_iter = match parser.parse(payload, ext_seqnum, packet_ts) {
|
||||
Ok(au_iter) => au_iter,
|
||||
Err(err) => {
|
||||
gst::warning!(CAT, imp: self, "Failed to parse payload for packet {ext_seqnum}: {err:#}");
|
||||
*au_acc = None;
|
||||
self.obj().drop_packets(..=packet.ext_seqnum());
|
||||
|
||||
return Ok(gst::FlowSuccess::Ok);
|
||||
}
|
||||
};
|
||||
|
||||
let mut aus = MaybeSingleAuOrList::default();
|
||||
for au in au_iter {
|
||||
let au = match au {
|
||||
Ok(au) => au,
|
||||
Err(err) => {
|
||||
gst::warning!(CAT, imp: self,
|
||||
"Failed to parse AU from packet {}: {err:#}", packet.ext_seqnum(),
|
||||
);
|
||||
|
||||
continue;
|
||||
}
|
||||
};
|
||||
|
||||
// § 3.1: The marker indicates that:
|
||||
// > the RTP packet payload contains either the final fragment of
|
||||
// > a fragmented Access Unit or one or more complete Access Units
|
||||
if !packet.marker_bit() {
|
||||
if !au.is_fragment {
|
||||
gst::warning!(CAT, imp: self, "Dropping non fragmented AU {au} in un-marked packet");
|
||||
continue;
|
||||
}
|
||||
|
||||
if let Some(ref mut acc) = au_acc {
|
||||
if let Err(err) = acc.try_append(au) {
|
||||
gst::warning!(CAT, imp: self, "Discarding pending fragmented AU: {err}");
|
||||
*au_acc = None;
|
||||
parser.reset();
|
||||
self.obj().drop_packets(..=packet.ext_seqnum());
|
||||
|
||||
return Ok(gst::FlowSuccess::Ok);
|
||||
}
|
||||
} else {
|
||||
*au_acc = Some(AuAccumulator::new(au));
|
||||
}
|
||||
|
||||
gst::trace!(CAT, imp: self, "Non-final fragment");
|
||||
|
||||
return Ok(gst::FlowSuccess::Ok);
|
||||
}
|
||||
|
||||
// Packet marker set
|
||||
|
||||
let au = match au_acc.take() {
|
||||
Some(mut acc) => {
|
||||
if au.is_fragment {
|
||||
if let Err(err) = acc.try_append(au) {
|
||||
gst::warning!(CAT, imp: self, "Discarding pending fragmented AU: {err}");
|
||||
parser.reset();
|
||||
self.obj().drop_packets(..=packet.ext_seqnum());
|
||||
|
||||
return Ok(gst::FlowSuccess::Ok);
|
||||
}
|
||||
|
||||
match acc.try_into_au() {
|
||||
Ok(au) => au,
|
||||
Err(err) => {
|
||||
gst::warning!(CAT, imp: self, "Discarding pending fragmented AU: {err}");
|
||||
let Mpeg4GenericDepayError::FragmentedAuSizeMismatch { .. } = err
|
||||
else {
|
||||
unreachable!();
|
||||
};
|
||||
parser.reset();
|
||||
self.obj().drop_packets(..=packet.ext_seqnum());
|
||||
|
||||
return Ok(gst::FlowSuccess::Ok);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
gst::warning!(CAT, imp: self,
|
||||
"Discarding pending fragmented AU {} due to incoming non fragmented AU {au}",
|
||||
acc.0,
|
||||
);
|
||||
self.obj().drop_packets(..au.ext_seqnum);
|
||||
|
||||
au
|
||||
}
|
||||
}
|
||||
None => au,
|
||||
};
|
||||
|
||||
if let Some(ref mut deint_buf) = deint_buf {
|
||||
if let Err(err) = deint_buf.push_and_pop(au, &mut aus) {
|
||||
gst::warning!(CAT, imp: self, "Failed to push AU to deinterleave buffer: {err}");
|
||||
// The AU has been dropped, just keep going
|
||||
// Packet will be dropped eventually
|
||||
}
|
||||
|
||||
continue;
|
||||
}
|
||||
|
||||
if au.is_interleaved {
|
||||
// From gstrtpmp4gdepay.c:616:
|
||||
// > some broken non-interleaved streams have AU-index jumping around
|
||||
// > all over the place, apparently assuming receiver disregards
|
||||
|
||||
gst::warning!(CAT, imp: self, "Interleaved AU, but no `max_displacement` was defined");
|
||||
}
|
||||
|
||||
aus.push(au);
|
||||
}
|
||||
|
||||
if let Some(aus) = aus.take() {
|
||||
self.finish_buffer_or_list(&state, Some(packet.ext_seqnum()), aus)?;
|
||||
}
|
||||
|
||||
Ok(gst::FlowSuccess::Ok)
|
||||
}
|
||||
}
|
||||
|
||||
impl RtpMpeg4GenericDepay {
|
||||
#[inline]
|
||||
fn check_initial_packet(&self, state: &mut State, packet: &Packet) -> ControlFlow<()> {
|
||||
if state.can_parse {
|
||||
return ControlFlow::Continue(());
|
||||
}
|
||||
|
||||
let seqnum = (packet.ext_seqnum() & 0xffff) as u16;
|
||||
|
||||
if let Some(seqnum_base) = state.seqnum_base {
|
||||
let seqnum_base = (seqnum_base & 0xffff) as u16;
|
||||
|
||||
// Assume seqnum_base and the initial ext_seqnum are in the same cycle
|
||||
// This should be guaranteed by the JitterBuffer
|
||||
let delta = crate::utils::seqnum_distance(seqnum, seqnum_base);
|
||||
|
||||
if delta == 0 {
|
||||
gst::debug!(CAT, imp: self,
|
||||
"Got initial packet {seqnum_base} @ ext seqnum {}", packet.ext_seqnum(),
|
||||
);
|
||||
state.can_parse = true;
|
||||
|
||||
return ControlFlow::Continue(());
|
||||
}
|
||||
|
||||
if delta < 0 {
|
||||
gst::log!(CAT, imp: self,
|
||||
"Waiting for initial packet {seqnum_base}, got {seqnum} (ext seqnum {})",
|
||||
packet.ext_seqnum(),
|
||||
);
|
||||
|
||||
return ControlFlow::Break(());
|
||||
}
|
||||
|
||||
gst::debug!(CAT, imp: self,
|
||||
"Packet {seqnum} (ext seqnum {}) passed expected initial packet {seqnum_base}, will sync on next marker",
|
||||
packet.ext_seqnum(),
|
||||
);
|
||||
|
||||
state.seqnum_base = None;
|
||||
}
|
||||
|
||||
// Wait until a marked packet is found and start parsing from the next packet
|
||||
if packet.marker_bit() {
|
||||
gst::debug!(CAT, imp: self,
|
||||
"Found first marked packet {seqnum} (ext seqnum {}). Will start parsing from next packet",
|
||||
packet.ext_seqnum(),
|
||||
);
|
||||
|
||||
assert!(state.au_acc.is_none());
|
||||
state.can_parse = true;
|
||||
} else {
|
||||
gst::log!(CAT, imp: self,
|
||||
"First marked packet not found yet, skipping packet {seqnum} (ext seqnum {})",
|
||||
packet.ext_seqnum(),
|
||||
);
|
||||
}
|
||||
|
||||
ControlFlow::Break(())
|
||||
}
|
||||
|
||||
fn finish_buffer_or_list(
|
||||
&self,
|
||||
state: &State,
|
||||
packet_ext_seqnum: Option<u64>,
|
||||
aus: SingleAuOrList,
|
||||
) -> Result<gst::FlowSuccess, gst::FlowError> {
|
||||
use SingleAuOrList::*;
|
||||
|
||||
fn get_packet_to_buffer_relation(
|
||||
au: &AccessUnit,
|
||||
clock_rate: u32,
|
||||
range: RangeInclusive<u64>,
|
||||
) -> PacketToBufferRelation {
|
||||
if let Some((cts_delta, dts_delta)) = Option::zip(au.cts_delta, au.dts_delta) {
|
||||
let pts_offset = gst::Signed::<gst::ClockTime>::from(cts_delta as i64)
|
||||
.mul_div_floor(*gst::ClockTime::SECOND, clock_rate as u64)
|
||||
.unwrap();
|
||||
let dts_offset = gst::Signed::<gst::ClockTime>::from(dts_delta as i64)
|
||||
.mul_div_floor(*gst::ClockTime::SECOND, clock_rate as u64)
|
||||
.unwrap();
|
||||
PacketToBufferRelation::SeqnumsWithOffset {
|
||||
seqnums: range,
|
||||
timestamp_offset: TimestampOffset::PtsAndDts(pts_offset, dts_offset),
|
||||
}
|
||||
} else if let Some(cts_delta) = au.cts_delta {
|
||||
let pts_offset = gst::Signed::<gst::ClockTime>::from(cts_delta as i64)
|
||||
.mul_div_floor(*gst::ClockTime::SECOND, clock_rate as u64)
|
||||
.unwrap();
|
||||
PacketToBufferRelation::SeqnumsWithOffset {
|
||||
seqnums: range,
|
||||
timestamp_offset: TimestampOffset::Pts(pts_offset),
|
||||
}
|
||||
} else {
|
||||
PacketToBufferRelation::Seqnums(range)
|
||||
}
|
||||
}
|
||||
|
||||
match aus {
|
||||
Single(au) => {
|
||||
let range = if let Some(packet_ext_seqnum) = packet_ext_seqnum {
|
||||
au.ext_seqnum..=packet_ext_seqnum
|
||||
} else {
|
||||
au.ext_seqnum..=au.ext_seqnum
|
||||
};
|
||||
|
||||
let packet_to_buffer_relation =
|
||||
get_packet_to_buffer_relation(&au, state.clock_rate, range);
|
||||
|
||||
gst::trace!(CAT, imp: self, "Finishing AU buffer {packet_to_buffer_relation:?}");
|
||||
|
||||
let buffer = Self::new_buffer(au, state);
|
||||
|
||||
self.obj().queue_buffer(packet_to_buffer_relation, buffer)?;
|
||||
}
|
||||
List(au_list) => {
|
||||
for au in au_list {
|
||||
let range = if let Some(packet_ext_seqnum) = packet_ext_seqnum {
|
||||
au.ext_seqnum..=packet_ext_seqnum
|
||||
} else {
|
||||
au.ext_seqnum..=au.ext_seqnum
|
||||
};
|
||||
|
||||
let packet_to_buffer_relation =
|
||||
get_packet_to_buffer_relation(&au, state.clock_rate, range);
|
||||
|
||||
gst::trace!(CAT, imp: self, "Finishing AU buffer {packet_to_buffer_relation:?}");
|
||||
|
||||
let buffer = Self::new_buffer(au, state);
|
||||
|
||||
self.obj().queue_buffer(packet_to_buffer_relation, buffer)?;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Ok(gst::FlowSuccess::Ok)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
fn new_buffer(au: AccessUnit, state: &State) -> gst::Buffer {
|
||||
let mut buf = gst::Buffer::from_mut_slice(au.data);
|
||||
let buf_mut = buf.get_mut().unwrap();
|
||||
|
||||
if au.maybe_random_access == Some(false) {
|
||||
buf_mut.set_flags(gst::BufferFlags::DELTA_UNIT)
|
||||
}
|
||||
|
||||
if let Some(duration) = au.duration {
|
||||
let duration = (duration as u64)
|
||||
.mul_div_floor(*gst::ClockTime::SECOND, state.clock_rate as u64)
|
||||
.map(gst::ClockTime::from_nseconds);
|
||||
|
||||
buf_mut.set_duration(duration);
|
||||
}
|
||||
|
||||
buf
|
||||
}
|
||||
}
|
||||
185
net/rtp/src/mp4g/depay/mod.rs
Normal file
185
net/rtp/src/mp4g/depay/mod.rs
Normal file
|
|
@ -0,0 +1,185 @@
|
|||
// GStreamer RTP MPEG-4 generic elementary streams Depayloader
|
||||
//
|
||||
// Copyright (C) 2023-2024 François Laignel <francois 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
|
||||
|
||||
pub mod imp;
|
||||
pub(crate) mod parsers;
|
||||
|
||||
mod deint_buf;
|
||||
pub(crate) use deint_buf::DeinterleaveAuBuffer;
|
||||
|
||||
use gst::glib;
|
||||
use gst::prelude::*;
|
||||
use smallvec::SmallVec;
|
||||
|
||||
use std::fmt;
|
||||
|
||||
use crate::mp4g::{AccessUnitIndex, Mpeg4GenericError};
|
||||
|
||||
glib::wrapper! {
|
||||
pub struct RtpMpeg4GenericDepay(ObjectSubclass<imp::RtpMpeg4GenericDepay>)
|
||||
@extends crate::basedepay::RtpBaseDepay2, gst::Element, gst::Object;
|
||||
}
|
||||
|
||||
pub fn register(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
|
||||
gst::Element::register(
|
||||
Some(plugin),
|
||||
"rtpmp4gdepay2",
|
||||
gst::Rank::MARGINAL,
|
||||
RtpMpeg4GenericDepay::static_type(),
|
||||
)
|
||||
}
|
||||
|
||||
#[derive(thiserror::Error, Debug, PartialEq, Eq)]
|
||||
pub enum Mpeg4GenericDepayError {
|
||||
#[error("{}", .0)]
|
||||
Mpeg4Generic(#[from] Mpeg4GenericError),
|
||||
|
||||
#[error("AU header section too large: expected end {expected_end} / {total}")]
|
||||
AuHeaderSectionTooLarge { expected_end: usize, total: usize },
|
||||
|
||||
#[error("AU auxiliary section too large: expected end {expected_end} / {total}")]
|
||||
AuAuxiliarySectionTooLarge { expected_end: usize, total: usize },
|
||||
|
||||
#[error("Empty AU Data section")]
|
||||
EmptyAuData,
|
||||
|
||||
#[error("Unknown AU size, but multiple AUs in the packet")]
|
||||
MultipleAusUnknownSize,
|
||||
|
||||
#[error("Multiple AUs in packet but the AU size {au_size} is > AU data size {au_data_size}")]
|
||||
MultipleAusGreaterSizeThanAuData { au_size: usize, au_data_size: usize },
|
||||
|
||||
#[error("No more AU data left for AU with index {index}")]
|
||||
NoMoreAuDataLeft { index: AccessUnitIndex },
|
||||
|
||||
#[error("Got AU with index {index} which is earlier than the expected index {expected_index}")]
|
||||
TooEarlyAU {
|
||||
index: AccessUnitIndex,
|
||||
expected_index: AccessUnitIndex,
|
||||
},
|
||||
|
||||
#[error("Unexpected non-zero first AU index {index} in packet {ext_seqnum} due to configured constant duration")]
|
||||
ConstantDurationAuNonZeroIndex {
|
||||
index: AccessUnitIndex,
|
||||
ext_seqnum: u64,
|
||||
},
|
||||
|
||||
#[error("Constant duration not configured and no headers in packet {ext_seqnum}")]
|
||||
NonConstantDurationNoAuHeaders { ext_seqnum: u64 },
|
||||
|
||||
#[error("Constant duration not configured and no CTS delta for AU index {index} in packet {ext_seqnum}")]
|
||||
NonConstantDurationAuNoCtsDelta {
|
||||
index: AccessUnitIndex,
|
||||
ext_seqnum: u64,
|
||||
},
|
||||
|
||||
#[error(
|
||||
"Fragmented AU size mismatch: expected {expected}, found {found}. Packet {ext_seqnum}"
|
||||
)]
|
||||
FragmentedAuSizeMismatch {
|
||||
expected: u32,
|
||||
found: usize,
|
||||
ext_seqnum: u64,
|
||||
},
|
||||
|
||||
#[error("Fragmented AU CTS mismatch: expected {expected}, found {found}. Packet {ext_seqnum}")]
|
||||
FragmentedAuRtpTsMismatch {
|
||||
expected: i32,
|
||||
found: i32,
|
||||
ext_seqnum: u64,
|
||||
},
|
||||
|
||||
#[error("Fragmented AU DTS mismatch: expected {expected}, found {found}. Packet {ext_seqnum}")]
|
||||
FragmentedAuDtsMismatch {
|
||||
expected: i32,
|
||||
found: i32,
|
||||
ext_seqnum: u64,
|
||||
},
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
#[allow(clippy::large_enum_variant)]
|
||||
pub enum SingleAuOrList {
|
||||
Single(AccessUnit),
|
||||
List(SmallVec<[AccessUnit; 5]>),
|
||||
}
|
||||
|
||||
impl SingleAuOrList {
|
||||
pub fn new_list(capacity: usize) -> Self {
|
||||
SingleAuOrList::List(SmallVec::with_capacity(capacity))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn push(&mut self, au: AccessUnit) {
|
||||
use SingleAuOrList::*;
|
||||
match self {
|
||||
Single(_) => {
|
||||
let list = List(SmallVec::new());
|
||||
let prev = std::mem::replace(self, list);
|
||||
let Single(prev) = prev else { unreachable!() };
|
||||
let List(list) = self else { unreachable!() };
|
||||
list.push(prev);
|
||||
list.push(au);
|
||||
}
|
||||
List(list) => list.push(au),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Default)]
|
||||
pub struct MaybeSingleAuOrList(Option<SingleAuOrList>);
|
||||
|
||||
impl MaybeSingleAuOrList {
|
||||
pub fn new_list(capacity: usize) -> Self {
|
||||
MaybeSingleAuOrList(Some(SingleAuOrList::new_list(capacity)))
|
||||
}
|
||||
|
||||
pub fn push(&mut self, au: AccessUnit) {
|
||||
match &mut self.0 {
|
||||
Some(inner) => inner.push(au),
|
||||
None => self.0 = Some(SingleAuOrList::Single(au)),
|
||||
}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn take(&mut self) -> Option<SingleAuOrList> {
|
||||
self.0.take()
|
||||
}
|
||||
}
|
||||
|
||||
impl From<AccessUnit> for MaybeSingleAuOrList {
|
||||
fn from(au: AccessUnit) -> Self {
|
||||
MaybeSingleAuOrList(Some(SingleAuOrList::Single(au)))
|
||||
}
|
||||
}
|
||||
|
||||
/// A parsed Access Unit.
|
||||
///
|
||||
/// All timestamps and duration in clock rate ticks.
|
||||
/// All timestamps are based on the RTP timestamp of the packet.
|
||||
#[derive(Debug, Default)]
|
||||
pub struct AccessUnit {
|
||||
pub(crate) ext_seqnum: u64,
|
||||
pub(crate) is_fragment: bool,
|
||||
pub(crate) size: Option<u32>,
|
||||
pub(crate) index: AccessUnitIndex,
|
||||
pub(crate) cts_delta: Option<i32>,
|
||||
pub(crate) dts_delta: Option<i32>,
|
||||
pub(crate) duration: Option<u32>,
|
||||
pub(crate) maybe_random_access: Option<bool>,
|
||||
pub(crate) is_interleaved: bool,
|
||||
pub(crate) data: Vec<u8>,
|
||||
}
|
||||
|
||||
impl fmt::Display for AccessUnit {
|
||||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||
write!(f, "index {} from Packet {}", self.index, self.ext_seqnum)
|
||||
}
|
||||
}
|
||||
1050
net/rtp/src/mp4g/depay/parsers.rs
Normal file
1050
net/rtp/src/mp4g/depay/parsers.rs
Normal file
File diff suppressed because it is too large
Load diff
120
net/rtp/src/mp4g/header.rs
Normal file
120
net/rtp/src/mp4g/header.rs
Normal file
|
|
@ -0,0 +1,120 @@
|
|||
//! Access Unit Header and its parser & writer.
|
||||
|
||||
use bitstream_io::{BitRead, FromBitStreamWith};
|
||||
|
||||
use crate::mp4g::{AccessUnitIndex, ModeConfig};
|
||||
use crate::utils::raw_2_comp_to_i32;
|
||||
|
||||
#[derive(thiserror::Error, Debug, PartialEq, Eq)]
|
||||
pub enum AuHeaderError {
|
||||
#[error("Unexpected zero-sized AU {}", .0)]
|
||||
ZeroSizedAu(AccessUnitIndex),
|
||||
|
||||
#[error("Unexpected CTS flag set for the first AU header {}", .0)]
|
||||
CtsFlagSetInFirstAuHeader(AccessUnitIndex),
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
pub struct AuHeaderContext<'a> {
|
||||
pub(crate) config: &'a ModeConfig,
|
||||
pub(crate) prev_index: Option<AccessUnitIndex>,
|
||||
}
|
||||
|
||||
#[derive(Debug, Default)]
|
||||
pub struct AuHeader {
|
||||
pub(crate) size: Option<u32>,
|
||||
pub(crate) index: AccessUnitIndex,
|
||||
pub(crate) cts_delta: Option<i32>,
|
||||
pub(crate) dts_delta: Option<i32>,
|
||||
pub(crate) maybe_random_access: Option<bool>,
|
||||
pub(crate) is_interleaved: bool,
|
||||
}
|
||||
|
||||
impl AuHeader {
|
||||
#[inline]
|
||||
pub(crate) fn new_with(index: impl Into<AccessUnitIndex>) -> Self {
|
||||
AuHeader {
|
||||
index: index.into(),
|
||||
..Default::default()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a> FromBitStreamWith<'a> for AuHeader {
|
||||
type Context = AuHeaderContext<'a>;
|
||||
type Error = anyhow::Error;
|
||||
|
||||
fn from_reader<R: BitRead + ?Sized>(
|
||||
r: &mut R,
|
||||
ctx: &AuHeaderContext,
|
||||
) -> Result<Self, Self::Error> {
|
||||
use anyhow::Context;
|
||||
use AuHeaderError::*;
|
||||
|
||||
let mut this = AuHeader::default();
|
||||
|
||||
if ctx.config.size_len > 0 {
|
||||
let val = r
|
||||
.read::<u32>(ctx.config.size_len as u32)
|
||||
.context("AU-size")?;
|
||||
|
||||
// Will ensure the size is non-zero after we get the index
|
||||
this.size = Some(val);
|
||||
}
|
||||
|
||||
this.index = match ctx.prev_index {
|
||||
None => r
|
||||
.read::<u32>(ctx.config.index_len as u32)
|
||||
.context("AU-Index")?
|
||||
.into(),
|
||||
Some(prev_index) => {
|
||||
let delta = r
|
||||
.read::<u32>(ctx.config.index_delta_len as u32)
|
||||
.context("AU-Index-delta")?;
|
||||
if delta > 0 {
|
||||
this.is_interleaved = true;
|
||||
}
|
||||
|
||||
prev_index + 1u32 + delta
|
||||
}
|
||||
};
|
||||
|
||||
if let Some(0) = this.size {
|
||||
Err(ZeroSizedAu(this.index))?;
|
||||
}
|
||||
|
||||
if ctx.config.cts_delta_len > 0 && r.read_bit().context("CTS-flag")? {
|
||||
if ctx.prev_index.is_none() {
|
||||
// § 3.2.1.1:
|
||||
// > the CTS-flag field MUST have the value 0 in the first AU-header
|
||||
Err(CtsFlagSetInFirstAuHeader(this.index))?;
|
||||
}
|
||||
|
||||
let delta = r
|
||||
.read::<u32>(ctx.config.cts_delta_len as u32)
|
||||
.context("CTS-delta")?;
|
||||
let delta = raw_2_comp_to_i32(delta, ctx.config.cts_delta_len);
|
||||
this.cts_delta = Some(delta);
|
||||
}
|
||||
|
||||
if ctx.config.dts_delta_len > 0 && r.read_bit().context("DTS-flag")? {
|
||||
let delta = r
|
||||
.read::<u32>(ctx.config.dts_delta_len as u32)
|
||||
.context("DTS-delta")?;
|
||||
let delta = raw_2_comp_to_i32(delta, ctx.config.dts_delta_len);
|
||||
this.dts_delta = Some(delta);
|
||||
}
|
||||
|
||||
if ctx.config.random_access_indication {
|
||||
this.maybe_random_access = Some(r.read_bit().context("RAP-flag")?);
|
||||
}
|
||||
|
||||
// ignored by gstrtpmp4gdepay
|
||||
if ctx.config.stream_state_indication > 0 {
|
||||
r.skip(ctx.config.stream_state_indication as u32)
|
||||
.context("Stream-state")?;
|
||||
}
|
||||
|
||||
Ok(this)
|
||||
}
|
||||
}
|
||||
30
net/rtp/src/mp4g/mod.rs
Normal file
30
net/rtp/src/mp4g/mod.rs
Normal file
|
|
@ -0,0 +1,30 @@
|
|||
// SPDX-License-Identifier: MPL-2.0
|
||||
|
||||
pub mod depay;
|
||||
mod header;
|
||||
pub use header::{AuHeader, AuHeaderContext};
|
||||
mod mode;
|
||||
pub use mode::ModeConfig;
|
||||
|
||||
#[derive(thiserror::Error, Debug, PartialEq, Eq)]
|
||||
pub enum Mpeg4GenericError {
|
||||
#[error("Can't compare AU index 0x8000_0000 to 0")]
|
||||
AuIndexComparisonLimit,
|
||||
|
||||
#[error("Can't compare RTP timestamps 0x8000_0000 to 0")]
|
||||
RTPTimestampComparisonLimit,
|
||||
}
|
||||
|
||||
/// An Access Unit Index implemented as a comparable new type on a `[std::num::Wrapping]::<u32>`.
|
||||
define_wrapping_comparable_u32_with_display!(
|
||||
AccessUnitIndex,
|
||||
Mpeg4GenericError,
|
||||
AuIndexComparisonLimit,
|
||||
);
|
||||
|
||||
/// An RTP timestamp implemented as a comparable new type on a `[std::num::Wrapping]::<u32>`.
|
||||
define_wrapping_comparable_u32_with_display!(
|
||||
RtpTimestamp,
|
||||
Mpeg4GenericError,
|
||||
RTPTimestampComparisonLimit,
|
||||
);
|
||||
141
net/rtp/src/mp4g/mode.rs
Normal file
141
net/rtp/src/mp4g/mode.rs
Normal file
|
|
@ -0,0 +1,141 @@
|
|||
//! MPEG-4 Generic mode.
|
||||
|
||||
use std::str::FromStr;
|
||||
|
||||
#[derive(thiserror::Error, Debug, PartialEq, Eq)]
|
||||
pub enum ModeError {
|
||||
#[error("sizelength & constantsize can't be both defined")]
|
||||
BothAuSizeLenAndConstantSize,
|
||||
|
||||
#[error("Neither sizelength nor constantsize are defined, need at least one of them")]
|
||||
NeitherAuSizeLenNorConstantSize,
|
||||
|
||||
#[error("indexlength > 0 but indexdeltalength not defined")]
|
||||
MandatoryIndexDeltaLength,
|
||||
}
|
||||
|
||||
#[derive(Debug, Default)]
|
||||
pub struct ModeConfig {
|
||||
pub(crate) size_len: u8,
|
||||
pub(crate) index_len: u8,
|
||||
pub(crate) index_delta_len: u8,
|
||||
pub(crate) cts_delta_len: u8,
|
||||
pub(crate) dts_delta_len: u8,
|
||||
pub(crate) random_access_indication: bool,
|
||||
pub(crate) stream_state_indication: u8,
|
||||
pub(crate) auxiliary_data_size_len: u8,
|
||||
pub(crate) constant_size: u32,
|
||||
pub(crate) constant_duration: u32,
|
||||
pub(crate) max_displacement: u32,
|
||||
}
|
||||
|
||||
impl ModeConfig {
|
||||
#[inline]
|
||||
pub fn has_header_section(&self) -> bool {
|
||||
self.size_len > 0
|
||||
|| self.index_len > 0
|
||||
|| self.index_delta_len > 0
|
||||
|| self.cts_delta_len > 0
|
||||
|| self.dts_delta_len > 0
|
||||
|| self.random_access_indication
|
||||
|| self.stream_state_indication > 0
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn has_auxiliary_section(&self) -> bool {
|
||||
self.auxiliary_data_size_len > 0
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn constant_duration(&self) -> Option<u32> {
|
||||
if self.constant_duration == 0 {
|
||||
return None;
|
||||
}
|
||||
|
||||
Some(self.constant_duration)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn max_displacement(&self) -> Option<u32> {
|
||||
if self.max_displacement == 0 {
|
||||
return None;
|
||||
}
|
||||
|
||||
Some(self.max_displacement)
|
||||
}
|
||||
|
||||
pub fn from_caps(s: &gst::StructureRef) -> anyhow::Result<Self> {
|
||||
use ModeError::*;
|
||||
|
||||
// These values are optional and have a default value of 0 (no header)
|
||||
|
||||
let size_len = Self::parse_int::<u8>(s, "sizelength")?;
|
||||
let constant_size = Self::parse_int::<u32>(s, "constantsize")?;
|
||||
|
||||
if size_len != 0 && constant_size != 0 {
|
||||
Err(BothAuSizeLenAndConstantSize)?;
|
||||
}
|
||||
|
||||
if size_len == 0 && constant_size == 0 {
|
||||
Err(NeitherAuSizeLenNorConstantSize)?;
|
||||
}
|
||||
|
||||
// § 3.2.1
|
||||
// > If the AU-Index field is present in the first AU-header in the AU
|
||||
// > Header Section, then the AU-Index-delta field MUST be present in
|
||||
// > any subsequent (non-first) AU-header.
|
||||
|
||||
let index_len = Self::parse_int::<u8>(s, "indexlength")?;
|
||||
let index_delta_len = Self::parse_int::<u8>(s, "indexdeltalength")?;
|
||||
|
||||
if index_len > 0 && index_delta_len == 0 {
|
||||
Err(MandatoryIndexDeltaLength)?;
|
||||
}
|
||||
|
||||
// TODO check mode & mode_config conformity
|
||||
|
||||
Ok(ModeConfig {
|
||||
size_len,
|
||||
index_len,
|
||||
index_delta_len,
|
||||
cts_delta_len: Self::parse_int::<u8>(s, "ctsdeltalength")?,
|
||||
dts_delta_len: Self::parse_int::<u8>(s, "dtsdeltalength")?,
|
||||
random_access_indication: Self::parse_int::<u8>(s, "randomaccessindication")? > 0,
|
||||
stream_state_indication: Self::parse_int::<u8>(s, "streamstateindication")?,
|
||||
auxiliary_data_size_len: Self::parse_int::<u8>(s, "auxiliarydatasizelength")?,
|
||||
constant_size,
|
||||
constant_duration: Self::parse_int::<u32>(s, "constantduration")?,
|
||||
max_displacement: Self::parse_int::<u32>(s, "maxdisplacement")?,
|
||||
})
|
||||
}
|
||||
|
||||
/// Tries to read the `field` from the provided structure as an integer of type `T`.
|
||||
///
|
||||
/// Returns:
|
||||
///
|
||||
/// * `Ok(val)` if the field is present and its value could be parsed.
|
||||
/// * `Ok(0)` if the field is not present.
|
||||
/// * `Err(_)` otherwise.
|
||||
fn parse_int<'a, T>(s: &'a gst::StructureRef, field: &'static str) -> anyhow::Result<T>
|
||||
where
|
||||
T: TryFrom<i32> + FromStr + gst::glib::value::FromValue<'a>,
|
||||
<T as TryFrom<i32>>::Error: std::error::Error + Send + Sync + 'static,
|
||||
<T as FromStr>::Err: std::error::Error + Send + Sync + 'static,
|
||||
{
|
||||
use anyhow::Context;
|
||||
use gst::structure::GetError::*;
|
||||
|
||||
match s.get::<T>(field) {
|
||||
Ok(val) => Ok(val),
|
||||
Err(FieldNotFound { .. }) => Ok(T::try_from(0i32).unwrap()),
|
||||
Err(ValueGetError { .. }) => match s.get::<i32>(field) {
|
||||
Ok(val) => Ok(T::try_from(val).context(field)?),
|
||||
Err(_) => Ok(s
|
||||
.get::<&str>(field)
|
||||
.context(field)?
|
||||
.parse::<T>()
|
||||
.context(field)?),
|
||||
},
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1,7 +1,7 @@
|
|||
/// Computes the seqnum distance
|
||||
///
|
||||
/// This makes sense if both seqnums are in the same cycle.
|
||||
pub(crate) fn seqnum_distance(seqnum1: u16, seqnum2: u16) -> i16 {
|
||||
pub fn seqnum_distance(seqnum1: u16, seqnum2: u16) -> i16 {
|
||||
// See http://en.wikipedia.org/wiki/Serial_number_arithmetic
|
||||
|
||||
let seqnum1 = i16::from_ne_bytes(seqnum1.to_ne_bytes());
|
||||
|
|
@ -10,9 +10,274 @@ pub(crate) fn seqnum_distance(seqnum1: u16, seqnum2: u16) -> i16 {
|
|||
seqnum1.wrapping_sub(seqnum2)
|
||||
}
|
||||
|
||||
/// Converts a raw two's complement value of len `bit_len` into an i32.
|
||||
///
|
||||
/// # Panic
|
||||
///
|
||||
/// Panics if `bit_len` > 32.
|
||||
pub fn raw_2_comp_to_i32(val: u32, bit_len: u8) -> i32 {
|
||||
assert!(bit_len <= 32);
|
||||
|
||||
if val < 1u32 << (bit_len - 1) as u32 {
|
||||
// val is positive
|
||||
val as i32
|
||||
} else {
|
||||
((0x1_0000_0000 - (1u64 << bit_len)) as u32 + val) as i32
|
||||
}
|
||||
}
|
||||
|
||||
/// Defines a comparable new type `$typ` on a `[std::num::Wrapping]::<u32>`.
|
||||
///
|
||||
/// The new type will wrap-around on additions and substractions and it comparison
|
||||
/// operators take the wrapping in consideration.
|
||||
///
|
||||
/// The comparison algorithm uses [serial number arithmetic](serial-number-arithmetic).
|
||||
/// The limit being that it can't tell whether 0x8000_0000 is greater or less than 0.
|
||||
///
|
||||
/// # Examples
|
||||
///
|
||||
/// ```rust
|
||||
/// # use gstrsrtp::define_wrapping_comparable_u32;
|
||||
///
|
||||
/// /// Error type to return when comparing 0x8000_0000 to 0.
|
||||
/// struct RTPTimestampComparisonLimit;
|
||||
///
|
||||
/// /// Define the new type comparable and wrapping `u32` `RTPTimestamp`:
|
||||
/// define_wrapping_comparable_u32!(RTPTimestamp, RTPTimestampComparisonLimit);
|
||||
///
|
||||
/// let ts0 = RTPTimestamp::ZERO;
|
||||
/// assert!(ts0.is_zero());
|
||||
///
|
||||
/// let mut ts = ts0;
|
||||
/// ts += 1;
|
||||
/// assert_eq!(*ts, 1);
|
||||
/// assert_eq!(RTPTimestamp::MAX + ts, ts0);
|
||||
///
|
||||
/// let ts2: RTPTimestamp = 2.into();
|
||||
/// assert_eq!(*ts2, 2);
|
||||
/// assert_eq!(ts - ts2, RTPTimestamp::MAX);
|
||||
/// ```
|
||||
///
|
||||
/// [serial-number-arithmetic]: http://en.wikipedia.org/wiki/Serial_number_arithmetic
|
||||
#[macro_export]
|
||||
macro_rules! define_wrapping_comparable_u32 {
|
||||
($typ:ident) => {
|
||||
#[derive(Clone, Copy, Debug, Default)]
|
||||
pub struct $typ(std::num::Wrapping<u32>);
|
||||
|
||||
impl $typ {
|
||||
pub const ZERO: $typ = $typ(std::num::Wrapping(0));
|
||||
pub const MIN: $typ = $typ(std::num::Wrapping(u32::MIN));
|
||||
pub const MAX: $typ = $typ(std::num::Wrapping(u32::MAX));
|
||||
pub const NONE: Option<$typ> = None;
|
||||
|
||||
#[inline]
|
||||
pub const fn new(val: u32) -> Self {
|
||||
Self(std::num::Wrapping((val)))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn from_ext(ext_val: u64) -> Self {
|
||||
Self(std::num::Wrapping((ext_val & 0xffff_ffff) as u32))
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn is_zero(self) -> bool {
|
||||
self.0 .0 == 0
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn distance(self, other: Self) -> Option<i32> {
|
||||
self.distance_u32(other.0 .0)
|
||||
}
|
||||
|
||||
#[inline]
|
||||
pub fn distance_u32(self, other: u32) -> Option<i32> {
|
||||
// See http://en.wikipedia.org/wiki/Serial_number_arithmetic
|
||||
|
||||
let this = i32::from_ne_bytes(self.0 .0.to_ne_bytes());
|
||||
let other = i32::from_ne_bytes(other.to_ne_bytes());
|
||||
|
||||
match this.wrapping_sub(other) {
|
||||
-0x8000_0000 => {
|
||||
// This is the limit of the algorithm:
|
||||
// arguments are too far away to determine the result sign,
|
||||
// i.e. which one is greater than the other
|
||||
None
|
||||
}
|
||||
delta => Some(delta),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl From<u32> for $typ {
|
||||
fn from(value: u32) -> Self {
|
||||
Self(std::num::Wrapping(value))
|
||||
}
|
||||
}
|
||||
|
||||
impl From<$typ> for u32 {
|
||||
fn from(value: $typ) -> Self {
|
||||
value.0 .0
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::Deref for $typ {
|
||||
type Target = u32;
|
||||
|
||||
fn deref(&self) -> &u32 {
|
||||
&self.0 .0
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::Add for $typ {
|
||||
type Output = Self;
|
||||
fn add(self, rhs: Self) -> Self {
|
||||
Self(self.0.add(rhs.0))
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::Add<u32> for $typ {
|
||||
type Output = Self;
|
||||
fn add(self, rhs: u32) -> Self {
|
||||
Self(self.0.add(std::num::Wrapping(rhs)))
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::Add<i32> for $typ {
|
||||
type Output = Self;
|
||||
fn add(self, rhs: i32) -> Self {
|
||||
// See http://en.wikipedia.org/wiki/Serial_number_arithmetic
|
||||
|
||||
let this = i32::from_ne_bytes(self.0 .0.to_ne_bytes());
|
||||
let res = this.wrapping_add(rhs);
|
||||
|
||||
let res = u32::from_ne_bytes(res.to_ne_bytes());
|
||||
Self(std::num::Wrapping(res))
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::AddAssign for $typ {
|
||||
fn add_assign(&mut self, rhs: Self) {
|
||||
self.0.add_assign(rhs.0);
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::AddAssign<u32> for $typ {
|
||||
fn add_assign(&mut self, rhs: u32) {
|
||||
self.0.add_assign(std::num::Wrapping(rhs));
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::AddAssign<i32> for $typ {
|
||||
fn add_assign(&mut self, rhs: i32) {
|
||||
*self = *self + rhs;
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::Sub for $typ {
|
||||
type Output = Self;
|
||||
fn sub(self, rhs: Self) -> Self {
|
||||
self.sub(rhs.0 .0)
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::Sub<u32> for $typ {
|
||||
type Output = Self;
|
||||
fn sub(self, rhs: u32) -> Self {
|
||||
Self(self.0.sub(std::num::Wrapping(rhs)))
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::SubAssign for $typ {
|
||||
fn sub_assign(&mut self, rhs: Self) {
|
||||
self.sub_assign(rhs.0 .0);
|
||||
}
|
||||
}
|
||||
|
||||
impl std::ops::SubAssign<u32> for $typ {
|
||||
fn sub_assign(&mut self, rhs: u32) {
|
||||
self.0.sub_assign(std::num::Wrapping(rhs));
|
||||
}
|
||||
}
|
||||
|
||||
impl std::cmp::PartialEq for $typ {
|
||||
fn eq(&self, other: &Self) -> bool {
|
||||
self.0 .0 == other.0 .0
|
||||
}
|
||||
}
|
||||
|
||||
impl std::cmp::PartialEq<u32> for $typ {
|
||||
fn eq(&self, other: &u32) -> bool {
|
||||
self.0 .0 == *other
|
||||
}
|
||||
}
|
||||
|
||||
impl std::cmp::Eq for $typ {}
|
||||
|
||||
impl std::cmp::PartialOrd for $typ {
|
||||
fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
|
||||
self.distance(*other).map(|d| d.cmp(&0))
|
||||
}
|
||||
}
|
||||
|
||||
impl gst::prelude::OptionOperations for $typ {}
|
||||
};
|
||||
|
||||
($typ:ident, $comp_err_type:ident) => {
|
||||
define_wrapping_comparable_u32!($typ);
|
||||
|
||||
impl $typ {
|
||||
#[inline]
|
||||
pub fn try_cmp(&self, other: $typ) -> Result<std::cmp::Ordering, $comp_err_type> {
|
||||
self.partial_cmp(&other).ok_or($comp_err_type)
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
($typ:ident, $err_enum:ty, $comp_err_variant:ident) => {
|
||||
define_wrapping_comparable_u32!($typ);
|
||||
|
||||
impl $typ {
|
||||
#[inline]
|
||||
pub fn try_cmp(&self, other: $typ) -> Result<std::cmp::Ordering, $err_enum> {
|
||||
self.partial_cmp(&other)
|
||||
.ok_or(<$err_enum>::$comp_err_variant)
|
||||
}
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
#[macro_export]
|
||||
macro_rules! define_wrapping_comparable_u32_with_display {
|
||||
($typ:ident, impl) => {
|
||||
impl std::fmt::Display for $typ {
|
||||
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||||
f.write_fmt(format_args!("{}", self.0 .0))
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
($typ:ident) => {
|
||||
define_wrapping_comparable_u32!($typ);
|
||||
define_wrapping_comparable_u32_with_display!($typ, impl);
|
||||
};
|
||||
|
||||
($typ:ident, $comp_err_type:ty) => {
|
||||
define_wrapping_comparable_u32!($typ, $comp_err_type);
|
||||
define_wrapping_comparable_u32_with_display!($typ, impl);
|
||||
};
|
||||
|
||||
($typ:ident, $err_enum:ty, $comp_err_variant:ident,) => {
|
||||
define_wrapping_comparable_u32!($typ, $err_enum, $comp_err_variant);
|
||||
define_wrapping_comparable_u32_with_display!($typ, impl);
|
||||
};
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
define_wrapping_comparable_u32!(MyWrapper);
|
||||
|
||||
#[test]
|
||||
fn compare_seqnums() {
|
||||
|
|
@ -30,4 +295,185 @@ mod tests {
|
|||
assert_eq!(seqnum_distance(0x8000, 0), -0x8000);
|
||||
assert_eq!(seqnum_distance(0, 0x8000), -0x8000);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn raw_2_comp_12bits_to_i32() {
|
||||
const BITS: u8 = 12;
|
||||
assert_eq!(raw_2_comp_to_i32(0, BITS), 0);
|
||||
assert_eq!(raw_2_comp_to_i32(1, BITS), 1);
|
||||
assert_eq!(raw_2_comp_to_i32(2, BITS), 2);
|
||||
assert_eq!(raw_2_comp_to_i32(0xfff, BITS), -1i16 as i32);
|
||||
assert_eq!(raw_2_comp_to_i32(0xffe, BITS), -2i16 as i32);
|
||||
assert_eq!(raw_2_comp_to_i32(0x7ff, BITS), (1 << (BITS - 1)) - 1);
|
||||
assert_eq!(raw_2_comp_to_i32(0x800, BITS), -(1 << (BITS - 1)));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn raw_2_comp_16bits_to_i32() {
|
||||
const BITS: u8 = i16::BITS as u8;
|
||||
assert_eq!(raw_2_comp_to_i32(0, BITS), 0);
|
||||
assert_eq!(raw_2_comp_to_i32(1, BITS), 1);
|
||||
assert_eq!(raw_2_comp_to_i32(2, BITS), 2);
|
||||
assert_eq!(raw_2_comp_to_i32(0xffff, BITS), -1i16 as i32);
|
||||
assert_eq!(raw_2_comp_to_i32(0xfffe, BITS), -2i16 as i32);
|
||||
assert_eq!(raw_2_comp_to_i32(0x7fff, BITS), i16::MAX as i32);
|
||||
assert_eq!(raw_2_comp_to_i32(0x8000, BITS), i16::MIN as i32);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn raw_2_comp_32bits_to_i32() {
|
||||
const BITS: u8 = i32::BITS as u8;
|
||||
assert_eq!(raw_2_comp_to_i32(0, BITS), 0);
|
||||
assert_eq!(raw_2_comp_to_i32(1, BITS), 1);
|
||||
assert_eq!(raw_2_comp_to_i32(2, BITS), 2);
|
||||
assert_eq!(raw_2_comp_to_i32(0xffff_ffff, BITS), -1i16 as i32);
|
||||
assert_eq!(raw_2_comp_to_i32(0xffff_fffe, BITS), -2i16 as i32);
|
||||
assert_eq!(raw_2_comp_to_i32(0x7fff_ffff, BITS), i32::MAX);
|
||||
assert_eq!(raw_2_comp_to_i32(0x8000_0000, BITS), i32::MIN);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn wrapping_u32_basics() {
|
||||
let zero = MyWrapper::ZERO;
|
||||
let one = MyWrapper::from(1);
|
||||
let two = MyWrapper::from(2);
|
||||
|
||||
assert_eq!(u32::from(zero), 0);
|
||||
assert!(zero.is_zero());
|
||||
assert_eq!(u32::from(one), 1);
|
||||
assert_eq!(u32::from(two), 2);
|
||||
|
||||
let max_plus_1_u64 = MyWrapper::from_ext((u32::MAX as u64) + 1);
|
||||
assert_eq!(max_plus_1_u64, MyWrapper::ZERO);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn add_wrapping_u32() {
|
||||
let one = MyWrapper::from(1);
|
||||
let two = MyWrapper::from(2);
|
||||
|
||||
assert_eq!(MyWrapper::ZERO + one, one);
|
||||
assert_eq!(MyWrapper::ZERO + 1u32, one);
|
||||
assert_eq!(one + one, two);
|
||||
assert_eq!(one + 1u32, two);
|
||||
|
||||
assert_eq!(MyWrapper::MAX + MyWrapper::ZERO, MyWrapper::MAX);
|
||||
assert_eq!(MyWrapper::MAX + one, MyWrapper::ZERO);
|
||||
assert_eq!(MyWrapper::MAX + two, one);
|
||||
|
||||
let mut var = MyWrapper::ZERO;
|
||||
assert!(var.is_zero());
|
||||
var += 1;
|
||||
assert_eq!(var, one);
|
||||
var += one;
|
||||
assert_eq!(var, two);
|
||||
|
||||
let mut var = MyWrapper::MAX;
|
||||
var += 1;
|
||||
assert!(var.is_zero());
|
||||
var += one;
|
||||
assert_eq!(var, one);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn add_wrapping_u32_i32() {
|
||||
let one = MyWrapper::from(1);
|
||||
|
||||
assert_eq!(MyWrapper::ZERO + 1i32, one);
|
||||
assert_eq!(MyWrapper::ZERO + -1i32, MyWrapper::MAX);
|
||||
assert_eq!(MyWrapper::MAX + 1i32, MyWrapper::ZERO);
|
||||
assert_eq!(MyWrapper::MAX + 2i32, one);
|
||||
|
||||
assert_eq!(
|
||||
MyWrapper::from(0x8000_0000) + -0i32,
|
||||
MyWrapper::from(0x8000_0000)
|
||||
);
|
||||
assert_eq!(
|
||||
MyWrapper::from(0x8000_0000) + 1i32,
|
||||
MyWrapper::from(0x8000_0001)
|
||||
);
|
||||
assert_eq!(
|
||||
MyWrapper::from(0x8000_0000) + -1i32,
|
||||
MyWrapper::from(0x7fff_ffff)
|
||||
);
|
||||
assert_eq!(
|
||||
MyWrapper::from(0x7fff_ffff) + 1i32,
|
||||
MyWrapper::from(0x8000_0000)
|
||||
);
|
||||
assert_eq!(MyWrapper::ZERO + i32::MIN, MyWrapper::from(0x8000_0000));
|
||||
|
||||
let mut var = MyWrapper::ZERO;
|
||||
var += 1i32;
|
||||
assert_eq!(var, one);
|
||||
|
||||
let mut var = MyWrapper::ZERO;
|
||||
var += -1i32;
|
||||
assert_eq!(var, MyWrapper::MAX);
|
||||
|
||||
let mut var = MyWrapper::MAX;
|
||||
var += 1;
|
||||
assert_eq!(var, MyWrapper::ZERO);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn sub_wrapping_u32() {
|
||||
let one = MyWrapper::from(1);
|
||||
|
||||
assert_eq!(MyWrapper::ZERO - MyWrapper::ZERO, MyWrapper::ZERO);
|
||||
assert_eq!(MyWrapper::MAX - MyWrapper::MAX, MyWrapper::ZERO);
|
||||
assert_eq!(MyWrapper::ZERO - one, MyWrapper::MAX);
|
||||
assert_eq!(MyWrapper::ZERO - MyWrapper::MAX, one);
|
||||
assert_eq!(
|
||||
MyWrapper::ZERO - MyWrapper::from(0x8000_0000),
|
||||
MyWrapper::from(0x8000_0000)
|
||||
);
|
||||
assert_eq!(
|
||||
MyWrapper::from(0x8000_0000) - MyWrapper::ZERO,
|
||||
MyWrapper::from(0x8000_0000)
|
||||
);
|
||||
|
||||
let mut var = MyWrapper::ZERO;
|
||||
assert!(var.is_zero());
|
||||
var -= 1;
|
||||
assert_eq!(var, MyWrapper::MAX);
|
||||
|
||||
let mut var = MyWrapper::MAX;
|
||||
var -= MyWrapper::MAX;
|
||||
assert!(var.is_zero());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn compare_wrapping_u32() {
|
||||
use std::cmp::Ordering::*;
|
||||
|
||||
#[derive(Debug, PartialEq)]
|
||||
pub struct ComparisonLimit;
|
||||
define_wrapping_comparable_u32!(MyWrapper, ComparisonLimit);
|
||||
|
||||
let cmp = |a: u32, b: u32| MyWrapper::from(a).partial_cmp(&MyWrapper::from(b));
|
||||
let try_cmp = |a: u32, b: u32| MyWrapper::from(a).try_cmp(MyWrapper::from(b));
|
||||
|
||||
assert_eq!(cmp(0, 1).unwrap(), Less);
|
||||
assert_eq!(try_cmp(0, 1), Ok(Less));
|
||||
assert_eq!(cmp(1, 1).unwrap(), Equal);
|
||||
assert_eq!(try_cmp(1, 1), Ok(Equal));
|
||||
assert_eq!(cmp(1, 0).unwrap(), Greater);
|
||||
assert_eq!(try_cmp(1, 0), Ok(Greater));
|
||||
|
||||
assert_eq!(cmp(0x7fff_ffff, 0).unwrap(), Greater);
|
||||
assert_eq!(try_cmp(0x7fff_ffff, 0), Ok(Greater));
|
||||
assert_eq!(cmp(0xffff_ffff, 0).unwrap(), Less);
|
||||
assert_eq!(try_cmp(0xffff_ffff, 0), Ok(Less));
|
||||
|
||||
assert_eq!(cmp(0, 0x7fff_ffff).unwrap(), Less);
|
||||
assert_eq!(try_cmp(0, 0x7fff_ffff), Ok(Less));
|
||||
assert_eq!(cmp(0, 0xffff_ffff).unwrap(), Greater);
|
||||
assert_eq!(try_cmp(0, 0xffff_ffff), Ok(Greater));
|
||||
|
||||
// This is the limit of the algorithm:
|
||||
assert!(cmp(0x8000_0000, 0).is_none());
|
||||
assert!(cmp(0, 0x8000_0000).is_none());
|
||||
assert_eq!(try_cmp(0x8000_0000, 0), Err(ComparisonLimit));
|
||||
assert_eq!(try_cmp(0, 0x8000_0000), Err(ComparisonLimit));
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue