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gst-plugins-rs/mux/fmp4/src/fmp4mux/imp.rs
Sebastian Dröge 1998ecab45 fmp4mux: Refactor and clean up code 
Split many longer functions into multiple functions and simplify various
parts. Overall this is functionally still the same as before.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1068>
2023-01-30 14:41:33 +00:00

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// Copyright (C) 2021 Sebastian Dröge <sebastian@centricular.com>
//
// This Source Code Form is subject to the terms of the Mozilla Public License, v2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at
// <https://mozilla.org/MPL/2.0/>.
//
// SPDX-License-Identifier: MPL-2.0
use gst::glib;
use gst::prelude::*;
use gst::subclass::prelude::*;
use gst_base::prelude::*;
use gst_base::subclass::prelude::*;
use std::collections::VecDeque;
use std::mem;
use std::sync::Mutex;
use once_cell::sync::Lazy;
use super::boxes;
use super::Buffer;
use super::DeltaFrames;
/// Offset for the segment in non-single-stream variants.
const SEGMENT_OFFSET: gst::ClockTime = gst::ClockTime::from_seconds(60 * 60 * 1000);
/// Offset between UNIX epoch and Jan 1 1601 epoch in seconds.
/// 1601 = UNIX + UNIX_1601_OFFSET.
const UNIX_1601_OFFSET: u64 = 11_644_473_600;
/// Offset between NTP and UNIX epoch in seconds.
/// NTP = UNIX + NTP_UNIX_OFFSET.
const NTP_UNIX_OFFSET: u64 = 2_208_988_800;
/// Reference timestamp meta caps for NTP timestamps.
static NTP_CAPS: Lazy<gst::Caps> = Lazy::new(|| gst::Caps::builder("timestamp/x-ntp").build());
/// Reference timestamp meta caps for UNIX timestamps.
static UNIX_CAPS: Lazy<gst::Caps> = Lazy::new(|| gst::Caps::builder("timestamp/x-unix").build());
/// Returns the UTC time of the buffer in the UNIX epoch.
fn get_utc_time_from_buffer(buffer: &gst::BufferRef) -> Option<gst::ClockTime> {
buffer
.iter_meta::<gst::ReferenceTimestampMeta>()
.find_map(|meta| {
if meta.reference().can_intersect(&UNIX_CAPS) {
Some(meta.timestamp())
} else if meta.reference().can_intersect(&NTP_CAPS) {
meta.timestamp().checked_sub(NTP_UNIX_OFFSET.seconds())
} else {
None
}
})
}
/// Converts a running time to an UTC time.
fn running_time_to_utc_time(
running_time: impl Into<gst::Signed<gst::ClockTime>>,
running_time_utc_time_mapping: (
impl Into<gst::Signed<gst::ClockTime>>,
impl Into<gst::Signed<gst::ClockTime>>,
),
) -> Option<gst::ClockTime> {
running_time_utc_time_mapping
.1
.into()
.checked_sub(running_time_utc_time_mapping.0.into())
.and_then(|res| res.checked_add(running_time.into()))
.and_then(|res| res.positive())
}
/// Converts an UTC time to a running time.
fn utc_time_to_running_time(
utc_time: gst::ClockTime,
running_time_utc_time_mapping: (
impl Into<gst::Signed<gst::ClockTime>>,
impl Into<gst::Signed<gst::ClockTime>>,
),
) -> Option<gst::ClockTime> {
running_time_utc_time_mapping
.0
.into()
.checked_sub(running_time_utc_time_mapping.1.into())
.and_then(|res| res.checked_add_unsigned(utc_time))
.and_then(|res| res.positive())
}
static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
gst::DebugCategory::new(
"fmp4mux",
gst::DebugColorFlags::empty(),
Some("FMP4Mux Element"),
)
});
const DEFAULT_FRAGMENT_DURATION: gst::ClockTime = gst::ClockTime::from_seconds(10);
const DEFAULT_CHUNK_DURATION: Option<gst::ClockTime> = gst::ClockTime::NONE;
const DEFAULT_HEADER_UPDATE_MODE: super::HeaderUpdateMode = super::HeaderUpdateMode::None;
const DEFAULT_WRITE_MFRA: bool = false;
const DEFAULT_WRITE_MEHD: bool = false;
const DEFAULT_INTERLEAVE_BYTES: Option<u64> = None;
const DEFAULT_INTERLEAVE_TIME: Option<gst::ClockTime> = Some(gst::ClockTime::from_mseconds(250));
#[derive(Debug, Clone)]
struct Settings {
fragment_duration: gst::ClockTime,
chunk_duration: Option<gst::ClockTime>,
header_update_mode: super::HeaderUpdateMode,
write_mfra: bool,
write_mehd: bool,
interleave_bytes: Option<u64>,
interleave_time: Option<gst::ClockTime>,
movie_timescale: u32,
offset_to_zero: bool,
}
impl Default for Settings {
fn default() -> Self {
Settings {
fragment_duration: DEFAULT_FRAGMENT_DURATION,
chunk_duration: DEFAULT_CHUNK_DURATION,
header_update_mode: DEFAULT_HEADER_UPDATE_MODE,
write_mfra: DEFAULT_WRITE_MFRA,
write_mehd: DEFAULT_WRITE_MEHD,
interleave_bytes: DEFAULT_INTERLEAVE_BYTES,
interleave_time: DEFAULT_INTERLEAVE_TIME,
movie_timescale: 0,
offset_to_zero: false,
}
}
}
#[derive(Debug, Clone)]
struct PreQueuedBuffer {
/// Buffer
///
/// Buffer PTS/DTS are updated to the output segment in multi-stream configurations.
buffer: gst::Buffer,
/// PTS
///
/// In ONVIF mode this is the UTC time, otherwise it is the PTS running time.
pts: gst::ClockTime,
/// End PTS
///
/// In ONVIF mode this is the UTC time, otherwise it is the PTS running time.
end_pts: gst::ClockTime,
/// DTS
///
/// In ONVIF mode this is the UTC time, otherwise it is the DTS running time.
dts: Option<gst::Signed<gst::ClockTime>>,
/// End DTS
///
/// In ONVIF mode this is the UTC time, otherwise it is the DTS running time.
end_dts: Option<gst::Signed<gst::ClockTime>>,
}
#[derive(Debug)]
struct GopBuffer {
buffer: gst::Buffer,
pts: gst::ClockTime,
pts_position: gst::ClockTime,
dts: Option<gst::ClockTime>,
}
#[derive(Debug)]
struct Gop {
/// Start PTS.
start_pts: gst::ClockTime,
/// Start DTS.
start_dts: Option<gst::ClockTime>,
/// Earliest PTS.
earliest_pts: gst::ClockTime,
/// Once this is known to be the final earliest PTS/DTS
final_earliest_pts: bool,
/// PTS plus duration of last buffer, or start of next GOP
end_pts: gst::ClockTime,
/// Once this is known to be the final end PTS/DTS
final_end_pts: bool,
/// DTS plus duration of last buffer, or start of next GOP
end_dts: Option<gst::ClockTime>,
/// Earliest PTS buffer position
earliest_pts_position: gst::ClockTime,
/// Buffer, PTS running time, DTS running time
buffers: Vec<GopBuffer>,
}
struct Stream {
/// Sink pad for this stream.
sinkpad: super::FMP4MuxPad,
/// Pre-queue for ONVIF variant to timestamp all buffers with their UTC time.
///
/// In non-ONVIF mode this just collects the PTS/DTS and the corresponding running
/// times for later usage.
pre_queue: VecDeque<PreQueuedBuffer>,
/// Currently configured caps for this stream.
caps: gst::Caps,
/// Whether this stream is intra-only and has frame reordering.
delta_frames: DeltaFrames,
/// Currently queued GOPs, including incomplete ones.
queued_gops: VecDeque<Gop>,
/// Whether the fully queued GOPs are filling a whole fragment.
fragment_filled: bool,
/// Whether a whole chunk is queued.
chunk_filled: bool,
/// Difference between the first DTS and 0 in case of negative DTS
dts_offset: Option<gst::ClockTime>,
/// Current position (DTS, or PTS for intra-only) to prevent
/// timestamps from going backwards when queueing new buffers
current_position: gst::ClockTime,
/// Mapping between running time and UTC time in ONVIF mode.
running_time_utc_time_mapping: Option<(gst::Signed<gst::ClockTime>, gst::ClockTime)>,
}
#[derive(Default)]
struct State {
/// Currently configured streams.
streams: Vec<Stream>,
/// Stream header with ftyp and moov box.
///
/// Created once we received caps and kept up to date with the caps,
/// sent as part of the buffer list for the first fragment.
stream_header: Option<gst::Buffer>,
/// Sequence number of the current fragment.
sequence_number: u32,
/// Fragment tracking for mfra box
current_offset: u64,
fragment_offsets: Vec<super::FragmentOffset>,
/// Earliest PTS of the whole stream
earliest_pts: Option<gst::ClockTime>,
/// Current end PTS of the whole stream
end_pts: Option<gst::ClockTime>,
/// Start DTS of the whole stream
start_dts: Option<gst::ClockTime>,
/// Start PTS of the current fragment
fragment_start_pts: Option<gst::ClockTime>,
/// Start PTS of the current chunk
///
/// This is equal to `fragment_start_pts` if the current chunk is the first of a fragment,
/// and always equal to `fragment_start_pts` if no `chunk_duration` is set.
chunk_start_pts: Option<gst::ClockTime>,
/// Additional timeout delay in case GOPs are bigger than the fragment duration
timeout_delay: gst::ClockTime,
/// If headers (ftyp / moov box) were sent.
sent_headers: bool,
}
#[derive(Default)]
pub(crate) struct FMP4Mux {
state: Mutex<State>,
settings: Mutex<Settings>,
}
impl FMP4Mux {
/// Checks if a buffer is valid according to the stream configuration.
fn check_buffer(
buffer: &gst::BufferRef,
sinkpad: &super::FMP4MuxPad,
delta_frames: super::DeltaFrames,
) -> Result<(), gst::FlowError> {
if delta_frames.requires_dts() && buffer.dts().is_none() {
gst::error!(CAT, obj: sinkpad, "Require DTS for video streams");
return Err(gst::FlowError::Error);
}
if buffer.pts().is_none() {
gst::error!(CAT, obj: sinkpad, "Require timestamped buffers");
return Err(gst::FlowError::Error);
}
if delta_frames.intra_only() && buffer.flags().contains(gst::BufferFlags::DELTA_UNIT) {
gst::error!(CAT, obj: sinkpad, "Intra-only stream with delta units");
return Err(gst::FlowError::Error);
}
Ok(())
}
/// Peek the currently queued buffer on this stream.
///
/// This also determines the PTS/DTS that is finally going to be used, including
/// timestamp conversion to the UTC times in ONVIF mode.
fn peek_buffer(
&self,
stream: &mut Stream,
fragment_duration: gst::ClockTime,
) -> Result<Option<PreQueuedBuffer>, gst::FlowError> {
// If not in ONVIF mode or the mapping is already known and there is a pre-queued buffer
// then we can directly return it from here.
if self.obj().class().as_ref().variant != super::Variant::ONVIF
|| stream.running_time_utc_time_mapping.is_some()
{
if let Some(pre_queued_buffer) = stream.pre_queue.front() {
return Ok(Some(pre_queued_buffer.clone()));
}
}
// Pop buffer here, it will be stored in the pre-queue after calculating its timestamps
let mut buffer = match stream.sinkpad.pop_buffer() {
None => return Ok(None),
Some(buffer) => buffer,
};
Self::check_buffer(&buffer, &stream.sinkpad, stream.delta_frames)?;
let segment = match stream.sinkpad.segment().downcast::<gst::ClockTime>().ok() {
Some(segment) => segment,
None => {
gst::error!(CAT, obj: stream.sinkpad, "Got buffer before segment");
return Err(gst::FlowError::Error);
}
};
let pts_position = buffer.pts().unwrap();
let duration = buffer.duration();
let end_pts_position = duration.opt_add(pts_position).unwrap_or(pts_position);
let pts = segment
.to_running_time_full(pts_position)
.ok_or_else(|| {
gst::error!(CAT, obj: stream.sinkpad, "Couldn't convert PTS to running time");
gst::FlowError::Error
})?
.positive()
.unwrap_or_else(|| {
gst::warning!(CAT, obj: stream.sinkpad, "Negative PTSs are not supported");
gst::ClockTime::ZERO
});
let end_pts = segment
.to_running_time_full(end_pts_position)
.ok_or_else(|| {
gst::error!(
CAT,
obj: stream.sinkpad,
"Couldn't convert end PTS to running time"
);
gst::FlowError::Error
})?
.positive()
.unwrap_or_else(|| {
gst::warning!(CAT, obj: stream.sinkpad, "Negative PTSs are not supported");
gst::ClockTime::ZERO
});
let (dts, end_dts) = if !stream.delta_frames.requires_dts() {
(None, None)
} else {
// Negative DTS are handled via the dts_offset and by having negative composition time
// offsets in the `trun` box. The smallest DTS here is shifted to zero.
let dts_position = buffer.dts().expect("not DTS");
let end_dts_position = duration.opt_add(dts_position).unwrap_or(dts_position);
let dts = segment.to_running_time_full(dts_position).ok_or_else(|| {
gst::error!(CAT, obj: stream.sinkpad, "Couldn't convert DTS to running time");
gst::FlowError::Error
})?;
let end_dts = segment
.to_running_time_full(end_dts_position)
.ok_or_else(|| {
gst::error!(
CAT,
obj: stream.sinkpad,
"Couldn't convert end DTS to running time"
);
gst::FlowError::Error
})?;
let end_dts = std::cmp::max(end_dts, dts);
(Some(dts), Some(end_dts))
};
// If this is a multi-stream element then we need to update the PTS/DTS positions according
// to the output segment, specifically to re-timestamp them with the running time and
// adjust for the segment shift to compensate for negative DTS.
if !self.obj().class().as_ref().variant.is_single_stream() {
let pts_position = pts + SEGMENT_OFFSET;
let dts_position = dts.map(|dts| {
dts.checked_add_unsigned(SEGMENT_OFFSET)
.and_then(|dts| dts.positive())
.unwrap_or(gst::ClockTime::ZERO)
});
let buffer = buffer.make_mut();
buffer.set_pts(pts_position);
buffer.set_dts(dts_position);
}
if self.obj().class().as_ref().variant != super::Variant::ONVIF {
// Store in the queue so we don't have to recalculate this all the time
stream.pre_queue.push_back(PreQueuedBuffer {
buffer,
pts,
end_pts,
dts,
end_dts,
});
} else if let Some(running_time_utc_time_mapping) = stream.running_time_utc_time_mapping {
// For ONVIF we need to re-timestamp the buffer with its UTC time.
//
// After re-timestamping, put the buffer into the pre-queue so re-timestamping only has to
// happen once.
let utc_time = match get_utc_time_from_buffer(&buffer) {
None => {
// Calculate from the mapping
running_time_to_utc_time(pts, running_time_utc_time_mapping).ok_or_else(
|| {
gst::error!(CAT, obj: stream.sinkpad, "Stream has negative PTS UTC time");
gst::FlowError::Error
},
)?
}
Some(utc_time) => utc_time,
};
gst::trace!(
CAT,
obj: stream.sinkpad,
"Mapped PTS running time {pts} to UTC time {utc_time}"
);
let end_pts_utc_time =
running_time_to_utc_time(end_pts, (pts, utc_time)).ok_or_else(|| {
gst::error!(CAT, obj: stream.sinkpad, "Stream has negative end PTS UTC time");
gst::FlowError::Error
})?;
let (dts_utc_time, end_dts_utc_time) = if let Some(dts) = dts {
let dts_utc_time =
running_time_to_utc_time(dts, (pts, utc_time)).ok_or_else(|| {
gst::error!(CAT, obj: stream.sinkpad, "Stream has negative DTS UTC time");
gst::FlowError::Error
})?;
gst::trace!(
CAT,
obj: stream.sinkpad,
"Mapped DTS running time {dts} to UTC time {dts_utc_time}"
);
let end_dts_utc_time = running_time_to_utc_time(end_dts.unwrap(), (pts, utc_time))
.ok_or_else(|| {
gst::error!(CAT, obj: stream.sinkpad, "Stream has negative end DTS UTC time");
gst::FlowError::Error
})?;
(
Some(gst::Signed::Positive(dts_utc_time)),
Some(gst::Signed::Positive(end_dts_utc_time)),
)
} else {
(None, None)
};
stream.pre_queue.push_back(PreQueuedBuffer {
buffer,
pts: utc_time,
end_pts: end_pts_utc_time,
dts: dts_utc_time,
end_dts: end_dts_utc_time,
});
} else {
// In ONVIF mode we need to get UTC times for each buffer and synchronize based on that.
// Queue up to min(6s, fragment_duration) of data in the very beginning to get the first UTC time and then backdate.
if let Some((last, first)) =
Option::zip(stream.pre_queue.back(), stream.pre_queue.front())
{
// Existence of PTS/DTS checked below
let (last, first) = if stream.delta_frames.requires_dts() {
(last.end_dts.unwrap(), first.end_dts.unwrap())
} else {
(
gst::Signed::Positive(last.end_pts),
gst::Signed::Positive(first.end_pts),
)
};
let limit = std::cmp::min(gst::ClockTime::from_seconds(6), fragment_duration);
if last.saturating_sub(first) > gst::Signed::Positive(limit) {
gst::error!(
CAT,
obj: stream.sinkpad,
"Got no UTC time in the first {limit} of the stream"
);
return Err(gst::FlowError::Error);
}
}
let utc_time = match get_utc_time_from_buffer(&buffer) {
Some(utc_time) => utc_time,
None => {
stream.pre_queue.push_back(PreQueuedBuffer {
buffer,
pts,
end_pts,
dts,
end_dts,
});
return Err(gst_base::AGGREGATOR_FLOW_NEED_DATA);
}
};
let mapping = (gst::Signed::Positive(pts), utc_time);
stream.running_time_utc_time_mapping = Some(mapping);
// Push the buffer onto the pre-queue and re-timestamp it and all other buffers
// based on the mapping above once we have an UTC time.
stream.pre_queue.push_back(PreQueuedBuffer {
buffer,
pts,
end_pts,
dts,
end_dts,
});
for pre_queued_buffer in stream.pre_queue.iter_mut() {
let pts_utc_time = running_time_to_utc_time(pre_queued_buffer.pts, mapping)
.ok_or_else(|| {
gst::error!(CAT, obj: stream.sinkpad, "Stream has negative PTS UTC time");
gst::FlowError::Error
})?;
gst::trace!(
CAT,
obj: stream.sinkpad,
"Mapped PTS running time {} to UTC time {pts_utc_time}",
pre_queued_buffer.pts,
);
pre_queued_buffer.pts = pts_utc_time;
let end_pts_utc_time = running_time_to_utc_time(pre_queued_buffer.end_pts, mapping)
.ok_or_else(|| {
gst::error!(CAT, obj: stream.sinkpad, "Stream has negative end PTS UTC time");
gst::FlowError::Error
})?;
pre_queued_buffer.end_pts = end_pts_utc_time;
if let Some(dts) = pre_queued_buffer.dts {
let dts_utc_time = running_time_to_utc_time(dts, mapping).ok_or_else(|| {
gst::error!(CAT, obj: stream.sinkpad, "Stream has negative DTS UTC time");
gst::FlowError::Error
})?;
gst::trace!(
CAT,
obj: stream.sinkpad,
"Mapped DTS running time {dts} to UTC time {dts_utc_time}"
);
pre_queued_buffer.dts = Some(gst::Signed::Positive(dts_utc_time));
let end_dts_utc_time = running_time_to_utc_time(
pre_queued_buffer.end_dts.unwrap(),
mapping,
)
.ok_or_else(|| {
gst::error!(CAT, obj: stream.sinkpad, "Stream has negative DTS UTC time");
gst::FlowError::Error
})?;
pre_queued_buffer.end_dts = Some(gst::Signed::Positive(end_dts_utc_time));
}
}
// Fall through and return the front of the queue
}
Ok(Some(stream.pre_queue.front().unwrap().clone()))
}
/// Pop the currently queued buffer from this stream.
fn pop_buffer(&self, stream: &mut Stream) -> PreQueuedBuffer {
// Only allowed to be called after peek was successful so there must be a buffer now
// or in ONVIF mode we must also know the mapping now.
assert!(!stream.pre_queue.is_empty());
if self.obj().class().as_ref().variant == super::Variant::ONVIF {
assert!(stream.running_time_utc_time_mapping.is_some());
}
stream.pre_queue.pop_front().unwrap()
}
/// Finds the stream that has the earliest buffer queued.
fn find_earliest_stream<'a>(
&self,
state: &'a mut State,
timeout: bool,
fragment_duration: gst::ClockTime,
) -> Result<Option<&'a mut Stream>, gst::FlowError> {
let mut earliest_stream = None;
let mut all_have_data_or_eos = true;
for stream in state.streams.iter_mut() {
let pre_queued_buffer = match Self::peek_buffer(self, stream, fragment_duration) {
Ok(Some(buffer)) => buffer,
Ok(None) | Err(gst_base::AGGREGATOR_FLOW_NEED_DATA) => {
if stream.sinkpad.is_eos() {
gst::trace!(CAT, obj: stream.sinkpad, "Stream is EOS");
} else {
all_have_data_or_eos = false;
gst::trace!(CAT, obj: stream.sinkpad, "Stream has no buffer");
}
continue;
}
Err(err) => return Err(err),
};
if stream.fragment_filled {
gst::trace!(CAT, obj: stream.sinkpad, "Stream has current fragment filled");
continue;
}
if stream.chunk_filled {
gst::trace!(CAT, obj: stream.sinkpad, "Stream has current chunk filled");
continue;
}
gst::trace!(
CAT,
obj: stream.sinkpad,
"Stream has running time PTS {} / DTS {} queued",
pre_queued_buffer.pts,
pre_queued_buffer.dts.display(),
);
let running_time = if stream.delta_frames.requires_dts() {
pre_queued_buffer.dts.unwrap()
} else {
gst::Signed::Positive(pre_queued_buffer.pts)
};
if earliest_stream
.as_ref()
.map_or(true, |(_stream, earliest_running_time)| {
*earliest_running_time > running_time
})
{
earliest_stream = Some((stream, running_time));
}
}
if !timeout && !all_have_data_or_eos {
gst::trace!(
CAT,
imp: self,
"No timeout and not all streams have a buffer or are EOS"
);
Ok(None)
} else if let Some((stream, earliest_running_time)) = earliest_stream {
gst::trace!(
CAT,
imp: self,
"Stream {} is earliest stream with running time {}",
stream.sinkpad.name(),
earliest_running_time
);
Ok(Some(stream))
} else {
gst::trace!(CAT, imp: self, "No streams have data queued currently");
Ok(None)
}
}
/// Queue incoming buffer as individual GOPs.
fn queue_gops(
&self,
stream: &mut Stream,
mut pre_queued_buffer: PreQueuedBuffer,
) -> Result<(), gst::FlowError> {
assert!(!stream.fragment_filled);
gst::trace!(CAT, obj: stream.sinkpad, "Handling buffer {:?}", pre_queued_buffer);
let delta_frames = stream.delta_frames;
// Enforce monotonically increasing PTS for intra-only streams, and DTS otherwise
if !delta_frames.requires_dts() {
if pre_queued_buffer.pts < stream.current_position {
gst::warning!(
CAT,
obj: stream.sinkpad,
"Decreasing PTS {} < {}",
pre_queued_buffer.pts,
stream.current_position,
);
pre_queued_buffer.pts = stream.current_position;
} else {
stream.current_position = pre_queued_buffer.pts;
}
pre_queued_buffer.end_pts =
std::cmp::max(pre_queued_buffer.end_pts, pre_queued_buffer.pts);
} else {
// Negative DTS are handled via the dts_offset and by having negative composition time
// offsets in the `trun` box. The smallest DTS here is shifted to zero.
let dts = match pre_queued_buffer.dts.unwrap() {
gst::Signed::Positive(dts) => {
if let Some(dts_offset) = stream.dts_offset {
dts + dts_offset
} else {
dts
}
}
gst::Signed::Negative(dts) => {
if stream.dts_offset.is_none() {
stream.dts_offset = Some(dts);
}
let dts_offset = stream.dts_offset.unwrap();
if dts > dts_offset {
gst::warning!(CAT, obj: stream.sinkpad, "DTS before first DTS");
gst::ClockTime::ZERO
} else {
dts_offset - dts
}
}
};
let end_dts = match pre_queued_buffer.end_dts.unwrap() {
gst::Signed::Positive(dts) => {
if let Some(dts_offset) = stream.dts_offset {
dts + dts_offset
} else {
dts
}
}
gst::Signed::Negative(dts) => {
let dts_offset = stream.dts_offset.unwrap();
if dts > dts_offset {
gst::warning!(CAT, obj: stream.sinkpad, "End DTS before first DTS");
gst::ClockTime::ZERO
} else {
dts_offset - dts
}
}
};
// Enforce monotonically increasing DTS for intra-only streams
// NOTE: PTS stays the same so this will cause a bigger PTS/DTS difference
// FIXME: Is this correct?
if dts < stream.current_position {
gst::warning!(
CAT,
obj: stream.sinkpad,
"Decreasing DTS {} < {}",
dts,
stream.current_position,
);
pre_queued_buffer.dts = Some(gst::Signed::Positive(stream.current_position));
} else {
pre_queued_buffer.dts = Some(gst::Signed::Positive(dts));
stream.current_position = dts;
}
pre_queued_buffer.end_dts = Some(gst::Signed::Positive(std::cmp::max(end_dts, dts)));
}
let PreQueuedBuffer {
buffer,
pts,
end_pts,
dts,
end_dts,
} = pre_queued_buffer;
let dts = dts.map(|v| v.positive().unwrap());
let end_dts = end_dts.map(|v| v.positive().unwrap());
let pts_position = buffer.pts().unwrap();
if !buffer.flags().contains(gst::BufferFlags::DELTA_UNIT) {
gst::debug!(
CAT,
obj: stream.sinkpad,
"Starting new GOP at PTS {} DTS {} (DTS offset {})",
pts,
dts.display(),
stream.dts_offset.display(),
);
let gop = Gop {
start_pts: pts,
start_dts: dts,
earliest_pts: pts,
earliest_pts_position: pts_position,
final_earliest_pts: !delta_frames.requires_dts(),
end_pts,
end_dts,
final_end_pts: false,
buffers: vec![GopBuffer {
buffer,
pts,
pts_position,
dts,
}],
};
stream.queued_gops.push_front(gop);
if let Some(prev_gop) = stream.queued_gops.get_mut(1) {
gst::debug!(
CAT,
obj: stream.sinkpad,
"Updating previous GOP starting at PTS {} to end PTS {} DTS {}",
prev_gop.earliest_pts,
pts,
dts.display(),
);
prev_gop.end_pts = std::cmp::max(prev_gop.end_pts, pts);
prev_gop.end_dts = std::cmp::max(prev_gop.end_dts, dts);
if !delta_frames.requires_dts() {
prev_gop.final_end_pts = true;
}
if !prev_gop.final_earliest_pts {
// Don't bother logging this for intra-only streams as it would be for every
// single buffer.
if delta_frames.requires_dts() {
gst::debug!(
CAT,
obj: stream.sinkpad,
"Previous GOP has final earliest PTS at {}",
prev_gop.earliest_pts
);
}
prev_gop.final_earliest_pts = true;
if let Some(prev_prev_gop) = stream.queued_gops.get_mut(2) {
prev_prev_gop.final_end_pts = true;
}
}
}
} else if let Some(gop) = stream.queued_gops.front_mut() {
assert!(!delta_frames.intra_only());
gop.end_pts = std::cmp::max(gop.end_pts, end_pts);
gop.end_dts = gop.end_dts.opt_max(end_dts);
gop.buffers.push(GopBuffer {
buffer,
pts,
pts_position,
dts,
});
if delta_frames.requires_dts() {
let dts = dts.unwrap();
if gop.earliest_pts > pts && !gop.final_earliest_pts {
gst::debug!(
CAT,
obj: stream.sinkpad,
"Updating current GOP earliest PTS from {} to {}",
gop.earliest_pts,
pts
);
gop.earliest_pts = pts;
gop.earliest_pts_position = pts_position;
if let Some(prev_gop) = stream.queued_gops.get_mut(1) {
if prev_gop.end_pts < pts {
gst::debug!(
CAT,
obj: stream.sinkpad,
"Updating previous GOP starting PTS {} end time from {} to {}",
pts,
prev_gop.end_pts,
pts
);
prev_gop.end_pts = pts;
}
}
}
let gop = stream.queued_gops.front_mut().unwrap();
// The earliest PTS is known when the current DTS is bigger or equal to the first
// PTS that was observed in this GOP. If there was another frame later that had a
// lower PTS then it wouldn't be possible to display it in time anymore, i.e. the
// stream would be invalid.
if gop.start_pts <= dts && !gop.final_earliest_pts {
gst::debug!(
CAT,
obj: stream.sinkpad,
"GOP has final earliest PTS at {}",
gop.earliest_pts
);
gop.final_earliest_pts = true;
if let Some(prev_gop) = stream.queued_gops.get_mut(1) {
prev_gop.final_end_pts = true;
}
}
}
} else {
gst::warning!(
CAT,
obj: stream.sinkpad,
"Waiting for keyframe at the beginning of the stream"
);
}
if let Some((prev_gop, first_gop)) = Option::zip(
stream.queued_gops.iter().find(|gop| gop.final_end_pts),
stream.queued_gops.back(),
) {
gst::debug!(
CAT,
obj: stream.sinkpad,
"Queued full GOPs duration updated to {}",
prev_gop.end_pts.saturating_sub(first_gop.earliest_pts),
);
}
gst::debug!(
CAT,
obj: stream.sinkpad,
"Queued duration updated to {}",
Option::zip(stream.queued_gops.front(), stream.queued_gops.back())
.map(|(end, start)| end.end_pts.saturating_sub(start.start_pts))
.unwrap_or(gst::ClockTime::ZERO)
);
Ok(())
}
/// Queue buffers from all streams that are not filled for the current fragment yet
fn queue_available_buffers(
&self,
state: &mut State,
settings: &Settings,
timeout: bool,
) -> Result<(), gst::FlowError> {
let fragment_start_pts = state.fragment_start_pts;
let chunk_start_pts = state.chunk_start_pts;
// Always take a buffer from the stream with the earliest queued buffer to keep the
// fill-level at all sinkpads in sync.
while let Some(stream) =
self.find_earliest_stream(state, timeout, settings.fragment_duration)?
{
let pre_queued_buffer = Self::pop_buffer(self, stream);
// Queue up the buffer and update GOP tracking state
self.queue_gops(stream, pre_queued_buffer)?;
// Check if this stream is filled enough now.
self.check_stream_filled(settings, stream, fragment_start_pts, chunk_start_pts, false);
}
Ok(())
}
/// Check if the stream is filled enough for the current chunk / fragment.
fn check_stream_filled(
&self,
settings: &Settings,
stream: &mut Stream,
fragment_start_pts: Option<gst::ClockTime>,
chunk_start_pts: Option<gst::ClockTime>,
all_eos: bool,
) {
// Either both are none or neither
let (chunk_start_pts, fragment_start_pts) = match (chunk_start_pts, fragment_start_pts) {
(Some(chunk_start_pts), Some(fragment_start_pts)) => {
(chunk_start_pts, fragment_start_pts)
}
_ => return,
};
// Check if this stream is filled enough now.
if let Some(chunk_duration) = settings.chunk_duration {
// In chunk mode
let (gop_idx, gop) = match stream
.queued_gops
.iter()
.enumerate()
.find(|(_idx, gop)| gop.final_earliest_pts || all_eos || stream.sinkpad.is_eos())
{
Some(res) => res,
None => {
gst::trace!(CAT, obj: stream.sinkpad, "Chunked mode but no GOP with final earliest PTS known yet");
return;
}
};
gst::trace!(
CAT,
obj: stream.sinkpad,
"GOP {gop_idx} start PTS {}, GOP end PTS {} (final {})",
gop.start_pts,
gop.end_pts,
gop.final_end_pts || all_eos || stream.sinkpad.is_eos(),
);
gst::trace!(
CAT,
obj: stream.sinkpad,
"Current chunk start {}, current fragment start {}",
chunk_start_pts,
fragment_start_pts,
);
let chunk_end_pts = chunk_start_pts + chunk_duration;
let fragment_end_pts = fragment_start_pts + settings.fragment_duration;
gst::trace!(
CAT,
obj: stream.sinkpad,
"Current chunk end {}, current fragment end {}",
chunk_end_pts,
fragment_end_pts,
);
// First check if the next split should be the end of a fragment or the end of a chunk.
// If both are the same then a fragment split has preference.
if fragment_end_pts <= chunk_end_pts && gop.start_pts >= fragment_end_pts {
gst::debug!(CAT, obj: stream.sinkpad, "Stream queued enough data for finishing this fragment");
stream.fragment_filled = true;
} else if chunk_end_pts < fragment_end_pts {
let last_pts = gop.buffers.last().map(|b| b.pts);
if gop.end_pts >= chunk_end_pts
// only if there's another GOP or at least one further buffer
&& (gop_idx > 0
|| last_pts.map_or(false, |last_pts| last_pts.saturating_sub(chunk_start_pts) > chunk_duration))
{
gst::debug!(CAT, obj: stream.sinkpad, "Stream queued enough data for this chunk");
stream.chunk_filled = true;
}
}
} else {
let gop = match stream
.queued_gops
.iter()
.find(|gop| gop.final_end_pts || all_eos || stream.sinkpad.is_eos())
{
Some(gop) => gop,
None => {
gst::trace!(CAT, obj: stream.sinkpad, "Fragment mode but no GOP with final end PTS known yet");
return;
}
};
gst::trace!(
CAT,
obj: stream.sinkpad,
"GOP start PTS {}, GOP end PTS {}",
gop.start_pts,
gop.end_pts,
);
// Check if the end of the latest finalized GOP is after the fragment end
let fragment_end_pts = fragment_start_pts + settings.fragment_duration;
gst::trace!(
CAT,
obj: stream.sinkpad,
"Current fragment start{}, current fragment end {}",
fragment_start_pts,
fragment_start_pts + settings.fragment_duration,
);
if gop.end_pts >= fragment_end_pts {
gst::debug!(CAT, obj: stream.sinkpad, "Stream queued enough data for this fragment");
stream.fragment_filled = true;
}
}
}
/// Calculate earliest PTS, i.e. PTS of the very first fragment.
///
/// This also sends a force-keyunit event for the start of the second fragment.
fn calculate_earliest_pts(
&self,
settings: &Settings,
state: &mut State,
upstream_events: &mut Vec<(super::FMP4MuxPad, gst::Event)>,
all_eos: bool,
timeout: bool,
) {
if state.earliest_pts.is_some() {
return;
}
let fragment_start_pts = state.fragment_start_pts;
let chunk_start_pts = state.chunk_start_pts;
// Calculate the earliest PTS after queueing input if we can now.
let mut earliest_pts = None;
let mut start_dts = None;
for stream in &state.streams {
let (stream_earliest_pts, stream_start_dts) = match stream.queued_gops.back() {
None => {
if !all_eos && !timeout {
earliest_pts = None;
start_dts = None;
break;
}
continue;
}
Some(oldest_gop) => {
if !all_eos && !timeout && !oldest_gop.final_earliest_pts {
earliest_pts = None;
start_dts = None;
break;
}
(oldest_gop.earliest_pts, oldest_gop.start_dts)
}
};
if earliest_pts.opt_gt(stream_earliest_pts).unwrap_or(true) {
earliest_pts = Some(stream_earliest_pts);
}
if let Some(stream_start_dts) = stream_start_dts {
if start_dts.opt_gt(stream_start_dts).unwrap_or(true) {
start_dts = Some(stream_start_dts);
}
}
}
let earliest_pts = match earliest_pts {
Some(earliest_pts) => earliest_pts,
None => return,
};
// The earliest PTS is known and as such the start of the first and second fragment.
gst::info!(
CAT,
imp: self,
"Got earliest PTS {}, start DTS {} (timeout: {timeout}, all eos: {all_eos})",
earliest_pts,
start_dts.display()
);
state.earliest_pts = Some(earliest_pts);
state.start_dts = start_dts;
state.fragment_start_pts = Some(earliest_pts);
state.chunk_start_pts = Some(earliest_pts);
// Now send force-keyunit events for the second fragment start.
let fku_time = earliest_pts + settings.fragment_duration;
for stream in &state.streams {
let current_position = stream.current_position;
// In case of ONVIF this needs to be converted back from UTC time to
// the stream's running time
let (fku_time, current_position) =
if self.obj().class().as_ref().variant == super::Variant::ONVIF {
(
if let Some(fku_time) = utc_time_to_running_time(
fku_time,
stream.running_time_utc_time_mapping.unwrap(),
) {
fku_time
} else {
continue;
},
utc_time_to_running_time(
current_position,
stream.running_time_utc_time_mapping.unwrap(),
),
)
} else {
(fku_time, Some(current_position))
};
let fku_time =
if current_position.map_or(false, |current_position| current_position > fku_time) {
gst::warning!(
CAT,
obj: stream.sinkpad,
"Sending first force-keyunit event late for running time {} at {}",
fku_time,
current_position.display(),
);
None
} else {
gst::debug!(
CAT,
obj: stream.sinkpad,
"Sending first force-keyunit event for running time {}",
fku_time,
);
Some(fku_time)
};
let fku = gst_video::UpstreamForceKeyUnitEvent::builder()
.running_time(fku_time)
.all_headers(true)
.build();
upstream_events.push((stream.sinkpad.clone(), fku));
}
// Check if any of the streams are already filled enough for the first chunk/fragment.
for stream in &mut state.streams {
self.check_stream_filled(
settings,
stream,
fragment_start_pts,
chunk_start_pts,
all_eos,
);
}
}
/// Drain buffers from a single stream.
#[allow(clippy::too_many_arguments)]
fn drain_buffers_one_stream(
&self,
settings: &Settings,
stream: &mut Stream,
timeout: bool,
all_eos: bool,
fragment_start_pts: gst::ClockTime,
chunk_start_pts: gst::ClockTime,
chunk_end_pts: Option<gst::ClockTime>,
fragment_start: bool,
fragment_filled: bool,
) -> Result<Vec<Gop>, gst::FlowError> {
assert!(
timeout
|| all_eos
|| stream.sinkpad.is_eos()
|| stream.queued_gops.get(1).map(|gop| gop.final_earliest_pts) == Some(true)
|| settings.chunk_duration.is_some()
);
let mut gops = Vec::with_capacity(stream.queued_gops.len());
if stream.queued_gops.is_empty() {
return Ok(gops);
}
// For the first stream drain as much as necessary and decide the end of this
// fragment or chunk, for all other streams drain up to that position.
if let Some(chunk_duration) = settings.chunk_duration {
// Chunk mode
let dequeue_end_pts = if let Some(chunk_end_pts) = chunk_end_pts {
// Not the first stream
chunk_end_pts
} else if fragment_filled {
// Fragment is filled, so only dequeue everything until the latest GOP
fragment_start_pts + settings.fragment_duration
} else {
// Fragment is not filled and we either have a full chunk or timeout
chunk_start_pts + chunk_duration
};
gst::trace!(
CAT,
obj: stream.sinkpad,
"Draining up to end PTS {} / duration {}",
dequeue_end_pts,
dequeue_end_pts - chunk_start_pts
);
while let Some(gop) = stream.queued_gops.back() {
// If this should be the last chunk of a fragment then only drain every
// finished GOP until the chunk end PTS. If there is no finished GOP for
// this stream (it would be not the first stream then), then drain
// everything up to the chunk end PTS.
//
// If this chunk is not the last chunk of a fragment then simply dequeue
// everything up to the chunk end PTS.
if fragment_filled {
gst::trace!(
CAT,
obj: stream.sinkpad,
"Fragment filled, current GOP start {} end {} (final {})",
gop.start_pts, gop.end_pts,
gop.final_end_pts || all_eos || stream.sinkpad.is_eos()
);
if (gop.final_end_pts || all_eos || stream.sinkpad.is_eos())
&& gop.end_pts <= dequeue_end_pts
{
gst::trace!(
CAT,
obj: stream.sinkpad,
"Pushing whole GOP",
);
gops.push(stream.queued_gops.pop_back().unwrap());
continue;
}
if !gops.is_empty() {
break;
}
gst::error!(CAT, obj: stream.sinkpad, "Don't have a full GOP at the end of a fragment");
} else {
gst::trace!(
CAT,
obj: stream.sinkpad,
"Chunk filled, current GOP start {} end {} (final {})",
gop.start_pts, gop.end_pts,
gop.final_end_pts || all_eos || stream.sinkpad.is_eos()
);
}
if gop.end_pts <= dequeue_end_pts
&& (gop.final_end_pts || all_eos || stream.sinkpad.is_eos())
{
gst::trace!(
CAT,
obj: stream.sinkpad,
"Pushing whole GOP",
);
gops.push(stream.queued_gops.pop_back().unwrap());
} else if gop.start_pts >= dequeue_end_pts
|| (!gop.final_earliest_pts && !all_eos && !stream.sinkpad.is_eos())
{
gst::trace!(
CAT,
obj: stream.sinkpad,
"GOP starts after chunk end",
);
break;
} else {
let gop = stream.queued_gops.back_mut().unwrap();
let start_pts = gop.start_pts;
let start_dts = gop.start_dts;
let earliest_pts = gop.earliest_pts;
let earliest_pts_position = gop.earliest_pts_position;
let mut split_index = None;
for (idx, buffer) in gop.buffers.iter().enumerate() {
if buffer.pts >= dequeue_end_pts {
break;
}
split_index = Some(idx);
}
let split_index = match split_index {
Some(split_index) => split_index,
None => {
// We have B frames and the first buffer of this GOP is too far
// in the future.
gst::trace!(
CAT,
obj: stream.sinkpad,
"First buffer of GOP too far in the future",
);
break;
}
};
// The last buffer of the GOP starts before the chunk end but ends
// after the end. We still take it here and remove the whole GOP.
if split_index == gop.buffers.len() - 1 {
if gop.final_end_pts || all_eos || stream.sinkpad.is_eos() {
gst::trace!(
CAT,
obj: stream.sinkpad,
"Pushing whole GOP",
);
gops.push(stream.queued_gops.pop_back().unwrap());
} else {
gst::trace!(
CAT,
obj: stream.sinkpad,
"Can't push whole GOP as it's not final yet",
);
}
break;
}
let mut buffers = mem::take(&mut gop.buffers);
// Contains all buffers from `split_index + 1` to the end
gop.buffers = buffers.split_off(split_index + 1);
gop.start_pts = gop.buffers[0].pts;
gop.start_dts = gop.buffers[0].dts;
gop.earliest_pts_position = gop.buffers[0].pts_position;
gop.earliest_pts = gop.buffers[0].pts;
gst::trace!(
CAT,
obj: stream.sinkpad,
"Splitting GOP and keeping PTS {}",
gop.buffers[0].pts,
);
let queue_gop = Gop {
start_pts,
start_dts,
earliest_pts,
final_earliest_pts: true,
end_pts: gop.start_pts,
final_end_pts: true,
end_dts: gop.start_dts,
earliest_pts_position,
buffers,
};
gops.push(queue_gop);
break;
}
}
if fragment_start {
if let Some(first_buffer) = gops.first().and_then(|gop| gop.buffers.first()) {
if first_buffer
.buffer
.flags()
.contains(gst::BufferFlags::DELTA_UNIT)
{
gst::error!(CAT, obj: stream.sinkpad, "First buffer of a new fragment is not a keyframe");
}
}
}
} else {
// Non-chunk mode
let dequeue_end_pts = if let Some(chunk_end_pts) = chunk_end_pts {
// Not the first stream
chunk_end_pts
} else {
fragment_start_pts + settings.fragment_duration
};
gst::trace!(
CAT,
obj: stream.sinkpad,
"Draining up to end PTS {} / duration {}",
dequeue_end_pts,
dequeue_end_pts - chunk_start_pts
);
while let Some(gop) = stream.queued_gops.back() {
gst::trace!(
CAT,
obj: stream.sinkpad,
"Current GOP start {} end {} (final {})",
gop.start_pts, gop.end_pts,
gop.final_end_pts || all_eos || stream.sinkpad.is_eos()
);
// If this GOP is not complete then we can't pop it yet.
//
// If there was no complete GOP at all yet then it might be bigger than the
// fragment duration. In this case we might not be able to handle the latency
// requirements in a live pipeline.
if !gop.final_end_pts && !all_eos && !stream.sinkpad.is_eos() {
gst::trace!(
CAT,
obj: stream.sinkpad,
"Not including GOP without final end PTS",
);
break;
}
// If this GOP starts after the fragment end then don't dequeue it yet unless this is
// the first stream and no GOPs were dequeued at all yet. This would mean that the
// GOP is bigger than the fragment duration.
if !all_eos
&& gop.end_pts > dequeue_end_pts
&& (chunk_end_pts.is_some() || !gops.is_empty())
{
gst::trace!(
CAT,
obj: stream.sinkpad,
"Not including GOP yet",
);
break;
}
gst::trace!(
CAT,
obj: stream.sinkpad,
"Pushing complete GOP",
);
gops.push(stream.queued_gops.pop_back().unwrap());
}
}
Ok(gops)
}
/// Flatten all GOPs, remove any gaps and calculate durations.
#[allow(clippy::type_complexity)]
fn flatten_gops(
&self,
idx: usize,
stream: &Stream,
gops: Vec<Gop>,
) -> Result<
Option<(
// All buffers of the GOPs without gaps
VecDeque<super::Buffer>,
// Earliest PTS
gst::ClockTime,
// Earliest PTS position
gst::ClockTime,
// End PTS
gst::ClockTime,
// Start DTS
Option<gst::ClockTime>,
// Start DTS position
Option<gst::ClockTime>,
// End DTS
Option<gst::ClockTime>,
)>,
gst::FlowError,
> {
let last_gop = gops.last().unwrap();
let end_pts = last_gop.end_pts;
let end_dts = last_gop.end_dts;
let mut gop_buffers = Vec::with_capacity(gops.iter().map(|g| g.buffers.len()).sum());
gop_buffers.extend(gops.into_iter().flat_map(|gop| gop.buffers.into_iter()));
// Then calculate durations for all of the buffers and get rid of any GAP buffers in
// the process.
// Also calculate the earliest PTS / start DTS here, which needs to consider GAP
// buffers too.
let mut buffers = VecDeque::with_capacity(gop_buffers.len());
let mut earliest_pts = None;
let mut earliest_pts_position = None;
let mut start_dts = None;
let mut start_dts_position = None;
let mut gop_buffers = gop_buffers.into_iter();
while let Some(buffer) = gop_buffers.next() {
// If this is a GAP buffer then skip it. Its duration was already considered
// below for the non-GAP buffer preceding it, and if there was none then the
// chunk start would be adjusted accordingly for this stream.
if buffer.buffer.flags().contains(gst::BufferFlags::GAP)
&& buffer.buffer.flags().contains(gst::BufferFlags::DROPPABLE)
&& buffer.buffer.size() == 0
{
gst::trace!(
CAT,
obj: stream.sinkpad,
"Skipping gap buffer {buffer:?}",
);
continue;
}
if earliest_pts.map_or(true, |earliest_pts| buffer.pts < earliest_pts) {
earliest_pts = Some(buffer.pts);
}
if earliest_pts_position.map_or(true, |earliest_pts_position| {
buffer.buffer.pts().unwrap() < earliest_pts_position
}) {
earliest_pts_position = Some(buffer.buffer.pts().unwrap());
}
if stream.delta_frames.requires_dts() && start_dts.is_none() {
start_dts = Some(buffer.dts.unwrap());
}
if stream.delta_frames.requires_dts() && start_dts_position.is_none() {
start_dts_position = Some(buffer.buffer.dts().unwrap());
}
let timestamp = if !stream.delta_frames.requires_dts() {
buffer.pts
} else {
buffer.dts.unwrap()
};
// Take as end timestamp the timestamp of the next non-GAP buffer
let end_timestamp = match gop_buffers.as_slice().iter().find(|buf| {
!buf.buffer.flags().contains(gst::BufferFlags::GAP)
|| !buf.buffer.flags().contains(gst::BufferFlags::DROPPABLE)
|| buf.buffer.size() != 0
}) {
Some(buffer) => {
if !stream.delta_frames.requires_dts() {
buffer.pts
} else {
buffer.dts.unwrap()
}
}
None => {
if !stream.delta_frames.requires_dts() {
end_pts
} else {
end_dts.unwrap()
}
}
};
// Timestamps are enforced to monotonically increase when queueing buffers
let duration = end_timestamp
.checked_sub(timestamp)
.expect("Timestamps going backwards");
let composition_time_offset = if !stream.delta_frames.requires_dts() {
None
} else {
let pts = buffer.pts;
let dts = buffer.dts.unwrap();
Some(
i64::try_from(
(gst::Signed::Positive(pts) - gst::Signed::Positive(dts)).nseconds(),
)
.map_err(|_| {
gst::error!(CAT, obj: stream.sinkpad, "Too big PTS/DTS difference");
gst::FlowError::Error
})?,
)
};
buffers.push_back(Buffer {
idx,
buffer: buffer.buffer,
timestamp,
duration,
composition_time_offset,
});
}
if buffers.is_empty() {
return Ok(None);
}
let earliest_pts = earliest_pts.unwrap();
let earliest_pts_position = earliest_pts_position.unwrap();
if stream.delta_frames.requires_dts() {
assert!(start_dts.is_some());
assert!(start_dts_position.is_some());
}
let start_dts = start_dts;
let start_dts_position = start_dts_position;
Ok(Some((
buffers,
earliest_pts,
earliest_pts_position,
end_pts,
start_dts,
start_dts_position,
end_dts,
)))
}
/// Drain buffers from all streams for the current chunk.
///
/// Also removes gap buffers, calculates buffer durations and various timestamps relevant for
/// the current chunk.
#[allow(clippy::type_complexity)]
fn drain_buffers(
&self,
state: &mut State,
settings: &Settings,
timeout: bool,
all_eos: bool,
) -> Result<
(
// Drained streams
Vec<(super::FragmentHeaderStream, VecDeque<Buffer>)>,
// Minimum earliest PTS position of all streams
Option<gst::ClockTime>,
// Minimum earliest PTS of all streams
Option<gst::ClockTime>,
// Minimum start DTS position of all streams (if any stream has DTS)
Option<gst::ClockTime>,
// End PTS of this drained fragment or chunk, i.e. start PTS of the next fragment or
// chunk
Option<gst::ClockTime>,
// With these drained buffers the current fragment is filled
bool,
// These buffers make the start of a new fragment
bool,
),
gst::FlowError,
> {
let mut drained_streams = Vec::with_capacity(state.streams.len());
let mut min_earliest_pts_position = None;
let mut min_earliest_pts = None;
let mut min_start_dts_position = None;
let mut chunk_end_pts = None;
// In fragment mode, each chunk is a full fragment. Otherwise, in chunk mode,
// this fragment is filled if it is filled for the first non-EOS stream
let fragment_filled = settings.chunk_duration.is_none()
|| state
.streams
.iter()
.find(|s| !s.sinkpad.is_eos())
.map(|s| s.fragment_filled)
== Some(true);
let fragment_start_pts = state.fragment_start_pts.unwrap();
let chunk_start_pts = state.chunk_start_pts.unwrap();
let fragment_start = fragment_start_pts == chunk_start_pts;
// The first stream decides how much can be dequeued, if anything at all.
//
// In chunk mode:
// If more than the fragment duration has passed until the latest GOPs earliest PTS then
// the fragment is considered filled and all GOPs until that GOP are drained. The next
// chunk would start a new fragment, and would start with the keyframe at the beginning
// of that latest GOP.
//
// Otherwise if more than a chunk duration is currently queued in GOPs of which the
// earliest PTS is known then drain everything up to that position. If nothing can be
// drained at all then advance the timeout by 1s until something can be dequeued.
//
// Otherwise:
// All complete GOPs (or at EOS everything) up to the fragment duration will be dequeued
// but on timeout in live pipelines it might happen that the first stream does not have a
// complete GOP queued. In that case nothing is dequeued for any of the streams and the
// timeout is advanced by 1s until at least one complete GOP can be dequeued.
//
// If the first stream is already EOS then the next stream that is not EOS yet will be
// taken in its place.
gst::info!(
CAT,
imp: self,
"Starting to drain at {} (fragment start {}, fragment end {}, chunk start {}, chunk end {})",
chunk_start_pts,
fragment_start_pts,
fragment_start_pts + settings.fragment_duration,
chunk_start_pts.display(),
settings.chunk_duration.map(|duration| chunk_start_pts + duration).display(),
);
for (idx, stream) in state.streams.iter_mut().enumerate() {
let stream_settings = stream.sinkpad.imp().settings.lock().unwrap().clone();
let gops = self.drain_buffers_one_stream(
settings,
stream,
timeout,
all_eos,
fragment_start_pts,
chunk_start_pts,
chunk_end_pts,
fragment_start,
fragment_filled,
)?;
stream.fragment_filled = false;
stream.chunk_filled = false;
// If we don't have a next chunk start PTS then this is the first stream as above.
if chunk_end_pts.is_none() {
if let Some(last_gop) = gops.last() {
// Dequeued something so let's take the end PTS of the last GOP
chunk_end_pts = Some(last_gop.end_pts);
gst::info!(
CAT,
obj: stream.sinkpad,
"Draining up to PTS {} for this chunk",
last_gop.end_pts,
);
} else {
// If nothing was dequeued for the first stream then this is OK if we're at
// EOS: we just consider the next stream as first stream then.
if all_eos || stream.sinkpad.is_eos() {
// This is handled below generally if nothing was dequeued
} else {
// Otherwise this can only really happen on timeout in live pipelines.
assert!(timeout);
if settings.chunk_duration.is_some() {
gst::warning!(
CAT,
obj: stream.sinkpad,
"Don't have anything to drain for the first stream on timeout in a live pipeline",
);
} else {
gst::warning!(
CAT,
obj: stream.sinkpad,
"Don't have a complete GOP for the first stream on timeout in a live pipeline",
);
}
// In this case we advance the timeout by 1s and hope that things are
// better then.
return Err(gst_base::AGGREGATOR_FLOW_NEED_DATA);
}
}
} else if all_eos {
if let Some(last_gop) = gops.last() {
if chunk_end_pts.map_or(true, |chunk_end_pts| chunk_end_pts < last_gop.end_pts)
{
chunk_end_pts = Some(last_gop.end_pts);
}
}
}
if gops.is_empty() {
gst::info!(
CAT,
obj: stream.sinkpad,
"Draining no buffers",
);
drained_streams.push((
super::FragmentHeaderStream {
caps: stream.caps.clone(),
start_time: None,
delta_frames: stream.delta_frames,
trak_timescale: stream_settings.trak_timescale,
},
VecDeque::new(),
));
continue;
}
assert!(chunk_end_pts.is_some());
if let Some((prev_gop, first_gop)) = Option::zip(
stream.queued_gops.iter().find(|gop| gop.final_end_pts),
stream.queued_gops.back(),
) {
gst::debug!(
CAT,
obj: stream.sinkpad,
"Queued full GOPs duration updated to {}",
prev_gop.end_pts.saturating_sub(first_gop.earliest_pts),
);
}
gst::debug!(
CAT,
obj: stream.sinkpad,
"Queued duration updated to {}",
Option::zip(stream.queued_gops.front(), stream.queued_gops.back())
.map(|(end, start)| end.end_pts.saturating_sub(start.start_pts))
.unwrap_or(gst::ClockTime::ZERO)
);
// First flatten all GOPs into a single `Vec`
let buffers = self.flatten_gops(idx, stream, gops)?;
let (
buffers,
earliest_pts,
earliest_pts_position,
end_pts,
start_dts,
start_dts_position,
_end_dts,
) = match buffers {
Some(res) => res,
None => {
gst::info!(
CAT,
obj: stream.sinkpad,
"Drained only gap buffers",
);
drained_streams.push((
super::FragmentHeaderStream {
caps: stream.caps.clone(),
start_time: None,
delta_frames: stream.delta_frames,
trak_timescale: stream_settings.trak_timescale,
},
VecDeque::new(),
));
continue;
}
};
gst::info!(
CAT,
obj: stream.sinkpad,
"Draining {} worth of buffers starting at PTS {} DTS {}, DTS offset {}",
end_pts.saturating_sub(earliest_pts),
earliest_pts,
start_dts.display(),
stream.dts_offset.display(),
);
let start_time = if !stream.delta_frames.requires_dts() {
earliest_pts
} else {
start_dts.unwrap()
};
if min_earliest_pts.opt_gt(earliest_pts).unwrap_or(true) {
min_earliest_pts = Some(earliest_pts);
}
if min_earliest_pts_position
.opt_gt(earliest_pts_position)
.unwrap_or(true)
{
min_earliest_pts_position = Some(earliest_pts_position);
}
if let Some(start_dts_position) = start_dts_position {
if min_start_dts_position
.opt_gt(start_dts_position)
.unwrap_or(true)
{
min_start_dts_position = Some(start_dts_position);
}
}
drained_streams.push((
super::FragmentHeaderStream {
caps: stream.caps.clone(),
start_time: Some(start_time),
delta_frames: stream.delta_frames,
trak_timescale: stream_settings.trak_timescale,
},
buffers,
));
}
Ok((
drained_streams,
min_earliest_pts_position,
min_earliest_pts,
min_start_dts_position,
chunk_end_pts,
fragment_filled,
fragment_start,
))
}
/// Interleave drained buffers of each stream for this chunk according to the settings.
#[allow(clippy::type_complexity)]
fn interleave_buffers(
&self,
settings: &Settings,
mut drained_streams: Vec<(super::FragmentHeaderStream, VecDeque<Buffer>)>,
) -> Result<(Vec<Buffer>, Vec<super::FragmentHeaderStream>), gst::FlowError> {
let mut interleaved_buffers =
Vec::with_capacity(drained_streams.iter().map(|(_, bufs)| bufs.len()).sum());
while let Some((_idx, (_, bufs))) =
drained_streams
.iter_mut()
.enumerate()
.min_by(|(a_idx, (_, a)), (b_idx, (_, b))| {
let (a, b) = match (a.front(), b.front()) {
(None, None) => return std::cmp::Ordering::Equal,
(None, _) => return std::cmp::Ordering::Greater,
(_, None) => return std::cmp::Ordering::Less,
(Some(a), Some(b)) => (a, b),
};
match a.timestamp.cmp(&b.timestamp) {
std::cmp::Ordering::Equal => a_idx.cmp(b_idx),
cmp => cmp,
}
})
{
let start_time = match bufs.front() {
None => {
// No more buffers now
break;
}
Some(buf) => buf.timestamp,
};
let mut current_end_time = start_time;
let mut dequeued_bytes = 0;
while settings
.interleave_bytes
.opt_ge(dequeued_bytes)
.unwrap_or(true)
&& settings
.interleave_time
.opt_ge(current_end_time.saturating_sub(start_time))
.unwrap_or(true)
{
if let Some(buffer) = bufs.pop_front() {
current_end_time = buffer.timestamp + buffer.duration;
dequeued_bytes += buffer.buffer.size() as u64;
interleaved_buffers.push(buffer);
} else {
// No buffers left in this stream, go to next stream
break;
}
}
}
// All buffers should be consumed now
assert!(drained_streams.iter().all(|(_, bufs)| bufs.is_empty()));
let streams = drained_streams
.into_iter()
.map(|(stream, _)| stream)
.collect::<Vec<_>>();
Ok((interleaved_buffers, streams))
}
/// Request a force-keyunit event for the start of the next fragment.
///
/// This is called whenever the last chunk of a fragment is pushed out.
///
/// `chunk_end_pts` gives the time of the previously drained chunk, which
/// ideally should be lower than the next fragment starts PTS.
fn request_force_keyunit_event(
&self,
state: &State,
settings: &Settings,
upstream_events: &mut Vec<(super::FMP4MuxPad, gst::Event)>,
chunk_end_pts: gst::ClockTime,
) {
let fku_time = chunk_end_pts + settings.fragment_duration;
for stream in &state.streams {
let current_position = stream.current_position;
// In case of ONVIF this needs to be converted back from UTC time to
// the stream's running time
let (fku_time, current_position) =
if self.obj().class().as_ref().variant == super::Variant::ONVIF {
(
if let Some(fku_time) = utc_time_to_running_time(
fku_time,
stream.running_time_utc_time_mapping.unwrap(),
) {
fku_time
} else {
continue;
},
utc_time_to_running_time(
current_position,
stream.running_time_utc_time_mapping.unwrap(),
),
)
} else {
(fku_time, Some(current_position))
};
let fku_time =
if current_position.map_or(false, |current_position| current_position > fku_time) {
gst::warning!(
CAT,
obj: stream.sinkpad,
"Sending force-keyunit event late for running time {} at {}",
fku_time,
current_position.display(),
);
None
} else {
gst::debug!(
CAT,
obj: stream.sinkpad,
"Sending force-keyunit event for running time {}",
fku_time,
);
Some(fku_time)
};
let fku = gst_video::UpstreamForceKeyUnitEvent::builder()
.running_time(fku_time)
.all_headers(true)
.build();
upstream_events.push((stream.sinkpad.clone(), fku));
}
}
/// Fills upstream events as needed and returns the caps the first time draining can happen.
///
/// If it returns `(_, None)` then there's currently nothing to drain anymore.
fn drain_one_chunk(
&self,
state: &mut State,
settings: &Settings,
timeout: bool,
at_eos: bool,
upstream_events: &mut Vec<(super::FMP4MuxPad, gst::Event)>,
) -> Result<(Option<gst::Caps>, Option<gst::BufferList>), gst::FlowError> {
if at_eos {
gst::info!(CAT, imp: self, "Draining at EOS");
} else if timeout {
gst::info!(CAT, imp: self, "Draining at timeout");
} else {
for stream in &state.streams {
if !stream.chunk_filled && !stream.fragment_filled && !stream.sinkpad.is_eos() {
return Ok((None, None));
}
}
gst::info!(
CAT,
imp: self,
"Draining because all streams have enough data queued"
);
}
// Collect all buffers and their timing information that are to be drained right now.
let (
drained_streams,
min_earliest_pts_position,
min_earliest_pts,
min_start_dts_position,
chunk_end_pts,
fragment_filled,
fragment_start,
) = self.drain_buffers(state, settings, timeout, at_eos)?;
// Create header now if it was not created before and return the caps
let mut caps = None;
if state.stream_header.is_none() {
let (_, new_caps) = self.update_header(state, settings, false)?.unwrap();
caps = Some(new_caps);
}
// Interleave buffers according to the settings into a single vec
let (mut interleaved_buffers, mut streams) =
self.interleave_buffers(settings, drained_streams)?;
// Offset stream start time to start at 0 in ONVIF mode, or if 'offset-to-zero' is enabled,
// instead of using the UTC time verbatim. This would be used for the tfdt box later.
// FIXME: Should this use the original DTS-or-PTS running time instead?
// That might be negative though!
if self.obj().class().as_ref().variant == super::Variant::ONVIF || settings.offset_to_zero {
let offset = if let Some(start_dts) = state.start_dts {
std::cmp::min(start_dts, state.earliest_pts.unwrap())
} else {
state.earliest_pts.unwrap()
};
for stream in &mut streams {
if let Some(start_time) = stream.start_time {
stream.start_time = Some(start_time.checked_sub(offset).unwrap());
}
}
}
if interleaved_buffers.is_empty() {
assert!(at_eos);
return Ok((caps, None));
}
// If there are actual buffers to output then create headers as needed and create a
// bufferlist for all buffers that have to be output.
let min_earliest_pts_position = min_earliest_pts_position.unwrap();
let min_earliest_pts = min_earliest_pts.unwrap();
let chunk_end_pts = chunk_end_pts.unwrap();
let mut fmp4_header = None;
if !state.sent_headers {
let mut buffer = state.stream_header.as_ref().unwrap().copy();
{
let buffer = buffer.get_mut().unwrap();
buffer.set_pts(min_earliest_pts_position);
buffer.set_dts(min_start_dts_position);
// Header is DISCONT|HEADER
buffer.set_flags(gst::BufferFlags::DISCONT | gst::BufferFlags::HEADER);
}
fmp4_header = Some(buffer);
state.sent_headers = true;
}
// TODO: Write prft boxes before moof
// TODO: Write sidx boxes before moof and rewrite once offsets are known
// First sequence number must be 1
if state.sequence_number == 0 {
state.sequence_number = 1;
}
let sequence_number = state.sequence_number;
// If this is the last chunk of a fragment then increment the sequence number for the
// start of the next fragment.
if fragment_filled {
state.sequence_number += 1;
}
let (mut fmp4_fragment_header, moof_offset) =
boxes::create_fmp4_fragment_header(super::FragmentHeaderConfiguration {
variant: self.obj().class().as_ref().variant,
sequence_number,
chunk: !fragment_start,
streams: streams.as_slice(),
buffers: interleaved_buffers.as_slice(),
})
.map_err(|err| {
gst::error!(
CAT,
imp: self,
"Failed to create FMP4 fragment header: {}",
err
);
gst::FlowError::Error
})?;
{
let buffer = fmp4_fragment_header.get_mut().unwrap();
buffer.set_pts(min_earliest_pts_position);
buffer.set_dts(min_start_dts_position);
buffer.set_duration(chunk_end_pts.checked_sub(min_earliest_pts));
// Fragment and chunk header is HEADER
buffer.set_flags(gst::BufferFlags::HEADER);
// Chunk header is DELTA_UNIT
if !fragment_start {
buffer.set_flags(gst::BufferFlags::DELTA_UNIT);
}
// Copy metas from the first actual buffer to the fragment header. This allows
// getting things like the reference timestamp meta or the timecode meta to identify
// the fragment.
let _ = interleaved_buffers[0].buffer.copy_into(
buffer,
gst::BufferCopyFlags::META,
0,
None,
);
}
let moof_offset = state.current_offset
+ fmp4_header.as_ref().map(|h| h.size()).unwrap_or(0) as u64
+ moof_offset;
let buffers_len = interleaved_buffers.len();
for (idx, buffer) in interleaved_buffers.iter_mut().enumerate() {
// Fix up buffer flags, all other buffers are DELTA_UNIT
let buffer_ref = buffer.buffer.make_mut();
buffer_ref.unset_flags(gst::BufferFlags::all());
buffer_ref.set_flags(gst::BufferFlags::DELTA_UNIT);
// Set the marker flag for the last buffer of the segment
if idx == buffers_len - 1 {
buffer_ref.set_flags(gst::BufferFlags::MARKER);
}
}
let buffer_list = fmp4_header
.into_iter()
.chain(Some(fmp4_fragment_header))
.chain(interleaved_buffers.into_iter().map(|buffer| buffer.buffer))
.inspect(|b| {
state.current_offset += b.size() as u64;
})
.collect::<gst::BufferList>();
if settings.write_mfra && fragment_start {
// Write mfra only for the main stream on fragment starts, and if there are no
// buffers for the main stream in this segment then don't write anything.
if let Some(super::FragmentHeaderStream {
start_time: Some(start_time),
..
}) = streams.get(0)
{
state.fragment_offsets.push(super::FragmentOffset {
time: *start_time,
offset: moof_offset,
});
}
}
state.end_pts = Some(chunk_end_pts);
// Update for the start PTS of the next fragment / chunk
if fragment_filled {
state.fragment_start_pts = Some(chunk_end_pts);
gst::info!(CAT, imp: self, "Starting new fragment at {}", chunk_end_pts,);
} else {
gst::info!(CAT, imp: self, "Starting new chunk at {}", chunk_end_pts,);
}
state.chunk_start_pts = Some(chunk_end_pts);
// If the current fragment is filled we already have the next fragment's start
// keyframe and can request the following one.
if fragment_filled {
self.request_force_keyunit_event(state, settings, upstream_events, chunk_end_pts);
}
// Reset timeout delay now that we've output an actual fragment or chunk
state.timeout_delay = gst::ClockTime::ZERO;
// TODO: Write edit list at EOS
// TODO: Rewrite bitrates at EOS
Ok((caps, Some(buffer_list)))
}
/// Drain all chunks that can currently be drained.
///
/// On error the `caps`, `buffers` or `upstream_events` can contain data of already finished
/// chunks that were complete before the error.
#[allow(clippy::too_many_arguments)]
fn drain(
&self,
state: &mut State,
settings: &Settings,
all_eos: bool,
mut timeout: bool,
caps: &mut Option<gst::Caps>,
buffers: &mut Vec<gst::BufferList>,
upstream_events: &mut Vec<(super::FMP4MuxPad, gst::Event)>,
) -> Result<(), gst::FlowError> {
// Loop as long as new chunks can be drained.
loop {
// If enough GOPs were queued, drain and create the output fragment or chunk
let res = self.drain_one_chunk(state, settings, timeout, all_eos, upstream_events);
let mut buffer_list = match res {
Ok((new_caps, buffer_list)) => {
if caps.is_none() {
*caps = new_caps;
}
buffer_list
}
Err(err) => {
if err == gst_base::AGGREGATOR_FLOW_NEED_DATA {
assert!(!all_eos);
assert!(timeout);
gst::element_imp_warning!(
self,
gst::StreamError::Format,
["Longer GOPs than fragment duration"]
);
state.timeout_delay += 1.seconds();
}
return Err(err);
}
};
// If nothing can't be drained anymore then break the loop, and if all streams are
// EOS add the footers.
if buffer_list.is_none() {
if settings.write_mfra && all_eos {
gst::debug!(CAT, imp: self, "Writing mfra box");
match boxes::create_mfra(&state.streams[0].caps, &state.fragment_offsets) {
Ok(mut mfra) => {
{
let mfra = mfra.get_mut().unwrap();
// mfra is DELTA_UNIT like other buffers
mfra.set_flags(gst::BufferFlags::DELTA_UNIT);
}
if buffer_list.is_none() {
buffer_list = Some(gst::BufferList::new_sized(1));
}
buffer_list.as_mut().unwrap().get_mut().unwrap().add(mfra);
buffers.extend(buffer_list);
}
Err(err) => {
gst::error!(CAT, imp: self, "Failed to create mfra box: {}", err);
}
}
}
break Ok(());
}
// Otherwise extend the list of bufferlists and check again if something can be
// drained.
buffers.extend(buffer_list);
// Only the first iteration is considered a timeout.
timeout = false;
let fragment_start_pts = state.fragment_start_pts;
let chunk_start_pts = state.chunk_start_pts;
for stream in &mut state.streams {
// Check if this stream is still filled enough now.
self.check_stream_filled(
settings,
stream,
fragment_start_pts,
chunk_start_pts,
all_eos,
);
}
// And try draining a fragment again
}
}
/// Create all streams.
fn create_streams(&self, state: &mut State) -> Result<(), gst::FlowError> {
for pad in self
.obj()
.sink_pads()
.into_iter()
.map(|pad| pad.downcast::<super::FMP4MuxPad>().unwrap())
{
let caps = match pad.current_caps() {
Some(caps) => caps,
None => {
gst::warning!(CAT, obj: pad, "Skipping pad without caps");
continue;
}
};
gst::info!(CAT, obj: pad, "Configuring caps {:?}", caps);
let s = caps.structure(0).unwrap();
let mut delta_frames = DeltaFrames::IntraOnly;
match s.name().as_str() {
"video/x-h264" | "video/x-h265" => {
if !s.has_field_with_type("codec_data", gst::Buffer::static_type()) {
gst::error!(CAT, obj: pad, "Received caps without codec_data");
return Err(gst::FlowError::NotNegotiated);
}
delta_frames = DeltaFrames::Bidirectional;
}
"video/x-vp9" => {
if !s.has_field_with_type("colorimetry", str::static_type()) {
gst::error!(CAT, obj: pad, "Received caps without colorimetry");
return Err(gst::FlowError::NotNegotiated);
}
delta_frames = DeltaFrames::PredictiveOnly;
}
"image/jpeg" => (),
"audio/mpeg" => {
if !s.has_field_with_type("codec_data", gst::Buffer::static_type()) {
gst::error!(CAT, obj: pad, "Received caps without codec_data");
return Err(gst::FlowError::NotNegotiated);
}
}
"audio/x-opus" => {
if let Some(header) = s
.get::<gst::ArrayRef>("streamheader")
.ok()
.and_then(|a| a.get(0).and_then(|v| v.get::<gst::Buffer>().ok()))
{
if gst_pbutils::codec_utils_opus_parse_header(&header, None).is_err() {
gst::error!(CAT, obj: pad, "Received invalid Opus header");
return Err(gst::FlowError::NotNegotiated);
}
} else if gst_pbutils::codec_utils_opus_parse_caps(&caps, None).is_err() {
gst::error!(CAT, obj: pad, "Received invalid Opus caps");
return Err(gst::FlowError::NotNegotiated);
}
}
"audio/x-alaw" | "audio/x-mulaw" => (),
"audio/x-adpcm" => (),
"application/x-onvif-metadata" => (),
_ => unreachable!(),
}
state.streams.push(Stream {
sinkpad: pad,
caps,
delta_frames,
pre_queue: VecDeque::new(),
queued_gops: VecDeque::new(),
fragment_filled: false,
chunk_filled: false,
dts_offset: None,
current_position: gst::ClockTime::ZERO,
running_time_utc_time_mapping: None,
});
}
if state.streams.is_empty() {
gst::error!(CAT, imp: self, "No streams available");
return Err(gst::FlowError::Error);
}
// Sort video streams first and then audio streams and then metadata streams, and each group by pad name.
state.streams.sort_by(|a, b| {
let order_of_caps = |caps: &gst::CapsRef| {
let s = caps.structure(0).unwrap();
if s.name().starts_with("video/") {
0
} else if s.name().starts_with("audio/") {
1
} else if s.name().starts_with("application/x-onvif-metadata") {
2
} else {
unimplemented!();
}
};
let st_a = order_of_caps(&a.caps);
let st_b = order_of_caps(&b.caps);
if st_a == st_b {
return a.sinkpad.name().cmp(&b.sinkpad.name());
}
st_a.cmp(&st_b)
});
Ok(())
}
/// Generate an updated header at the end and the corresponding caps with the new streamheader.
fn update_header(
&self,
state: &mut State,
settings: &Settings,
at_eos: bool,
) -> Result<Option<(gst::BufferList, gst::Caps)>, gst::FlowError> {
let aggregator = self.obj();
let class = aggregator.class();
let variant = class.as_ref().variant;
if settings.header_update_mode == super::HeaderUpdateMode::None && at_eos {
return Ok(None);
}
assert!(!at_eos || state.streams.iter().all(|s| s.queued_gops.is_empty()));
let duration = state
.end_pts
.opt_checked_sub(state.earliest_pts)
.ok()
.flatten();
let streams = state
.streams
.iter()
.map(|s| super::HeaderStream {
trak_timescale: s.sinkpad.imp().settings.lock().unwrap().trak_timescale,
delta_frames: s.delta_frames,
caps: s.caps.clone(),
})
.collect::<Vec<_>>();
let mut buffer = boxes::create_fmp4_header(super::HeaderConfiguration {
variant,
update: at_eos,
movie_timescale: settings.movie_timescale,
streams,
write_mehd: settings.write_mehd,
duration: if at_eos { duration } else { None },
start_utc_time: if variant == super::Variant::ONVIF {
state
.earliest_pts
.map(|unix| unix.nseconds() / 100 + UNIX_1601_OFFSET * 10_000_000)
} else {
None
},
})
.map_err(|err| {
gst::error!(CAT, imp: self, "Failed to create FMP4 header: {}", err);
gst::FlowError::Error
})?;
{
let buffer = buffer.get_mut().unwrap();
// No timestamps
// Header is DISCONT|HEADER
buffer.set_flags(gst::BufferFlags::DISCONT | gst::BufferFlags::HEADER);
}
// Remember stream header for later
state.stream_header = Some(buffer.clone());
let variant = match variant {
super::Variant::ISO | super::Variant::DASH | super::Variant::ONVIF => "iso-fragmented",
super::Variant::CMAF => "cmaf",
};
let caps = gst::Caps::builder("video/quicktime")
.field("variant", variant)
.field("streamheader", gst::Array::new([&buffer]))
.build();
let mut list = gst::BufferList::new_sized(1);
{
let list = list.get_mut().unwrap();
list.add(buffer);
}
Ok(Some((list, caps)))
}
/// Finish the stream be rewriting / updating headers.
fn finish(&self, settings: &Settings) {
// Do remaining EOS handling after the end of the stream was pushed.
gst::debug!(CAT, imp: self, "Doing EOS handling");
if settings.header_update_mode == super::HeaderUpdateMode::None {
// Need to output new headers if started again after EOS
self.state.lock().unwrap().sent_headers = false;
return;
}
let updated_header = self.update_header(&mut self.state.lock().unwrap(), settings, true);
match updated_header {
Ok(Some((buffer_list, caps))) => {
match settings.header_update_mode {
super::HeaderUpdateMode::None => unreachable!(),
super::HeaderUpdateMode::Rewrite => {
let mut q = gst::query::Seeking::new(gst::Format::Bytes);
if self.obj().src_pad().peer_query(&mut q) && q.result().0 {
let aggregator = self.obj();
aggregator.set_src_caps(&caps);
// Seek to the beginning with a default bytes segment
aggregator.update_segment(
&gst::FormattedSegment::<gst::format::Bytes>::new(),
);
if let Err(err) = aggregator.finish_buffer_list(buffer_list) {
gst::error!(
CAT,
imp: self,
"Failed pushing updated header buffer downstream: {:?}",
err,
);
}
} else {
gst::error!(
CAT,
imp: self,
"Can't rewrite header because downstream is not seekable"
);
}
}
super::HeaderUpdateMode::Update => {
let aggregator = self.obj();
aggregator.set_src_caps(&caps);
if let Err(err) = aggregator.finish_buffer_list(buffer_list) {
gst::error!(
CAT,
imp: self,
"Failed pushing updated header buffer downstream: {:?}",
err,
);
}
}
}
}
Ok(None) => {}
Err(err) => {
gst::error!(
CAT,
imp: self,
"Failed to generate updated header: {:?}",
err
);
}
}
// Need to output new headers if started again after EOS
self.state.lock().unwrap().sent_headers = false;
}
}
#[glib::object_subclass]
impl ObjectSubclass for FMP4Mux {
const NAME: &'static str = "GstFMP4Mux";
type Type = super::FMP4Mux;
type ParentType = gst_base::Aggregator;
type Class = Class;
}
impl ObjectImpl for FMP4Mux {
fn properties() -> &'static [glib::ParamSpec] {
static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
vec![
glib::ParamSpecUInt64::builder("fragment-duration")
.nick("Fragment Duration")
.blurb("Duration for each FMP4 fragment")
.default_value(DEFAULT_FRAGMENT_DURATION.nseconds())
.mutable_ready()
.build(),
glib::ParamSpecUInt64::builder("chunk-duration")
.nick("Chunk Duration")
.blurb("Duration for each FMP4 chunk (default = no chunks)")
.default_value(u64::MAX)
.mutable_ready()
.build(),
glib::ParamSpecEnum::builder_with_default("header-update-mode", DEFAULT_HEADER_UPDATE_MODE)
.nick("Header update mode")
.blurb("Mode for updating the header at the end of the stream")
.mutable_ready()
.build(),
glib::ParamSpecBoolean::builder("write-mfra")
.nick("Write mfra box")
.blurb("Write fragment random access box at the end of the stream")
.default_value(DEFAULT_WRITE_MFRA)
.mutable_ready()
.build(),
glib::ParamSpecBoolean::builder("write-mehd")
.nick("Write mehd box")
.blurb("Write movie extends header box with the duration at the end of the stream (needs a header-update-mode enabled)")
.default_value(DEFAULT_WRITE_MFRA)
.mutable_ready()
.build(),
glib::ParamSpecUInt64::builder("interleave-bytes")
.nick("Interleave Bytes")
.blurb("Interleave between streams in bytes")
.default_value(DEFAULT_INTERLEAVE_BYTES.unwrap_or(0))
.mutable_ready()
.build(),
glib::ParamSpecUInt64::builder("interleave-time")
.nick("Interleave Time")
.blurb("Interleave between streams in nanoseconds")
.default_value(DEFAULT_INTERLEAVE_TIME.map(gst::ClockTime::nseconds).unwrap_or(u64::MAX))
.mutable_ready()
.build(),
glib::ParamSpecUInt::builder("movie-timescale")
.nick("Movie Timescale")
.blurb("Timescale to use for the movie (units per second, 0 is automatic)")
.mutable_ready()
.build(),
]
});
&PROPERTIES
}
fn set_property(&self, _id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
match pspec.name() {
"fragment-duration" => {
let mut settings = self.settings.lock().unwrap();
let fragment_duration = value.get().expect("type checked upstream");
if settings.fragment_duration != fragment_duration {
settings.fragment_duration = fragment_duration;
let latency = settings
.chunk_duration
.unwrap_or(settings.fragment_duration);
drop(settings);
self.obj().set_latency(latency, None);
}
}
"chunk-duration" => {
let mut settings = self.settings.lock().unwrap();
let chunk_duration = value.get().expect("type checked upstream");
if settings.chunk_duration != chunk_duration {
settings.chunk_duration = chunk_duration;
let latency = settings
.chunk_duration
.unwrap_or(settings.fragment_duration);
drop(settings);
self.obj().set_latency(latency, None);
}
}
"header-update-mode" => {
let mut settings = self.settings.lock().unwrap();
settings.header_update_mode = value.get().expect("type checked upstream");
}
"write-mfra" => {
let mut settings = self.settings.lock().unwrap();
settings.write_mfra = value.get().expect("type checked upstream");
}
"write-mehd" => {
let mut settings = self.settings.lock().unwrap();
settings.write_mehd = value.get().expect("type checked upstream");
}
"interleave-bytes" => {
let mut settings = self.settings.lock().unwrap();
settings.interleave_bytes = match value.get().expect("type checked upstream") {
0 => None,
v => Some(v),
};
}
"interleave-time" => {
let mut settings = self.settings.lock().unwrap();
settings.interleave_time = match value.get().expect("type checked upstream") {
Some(gst::ClockTime::ZERO) | None => None,
v => v,
};
}
"movie-timescale" => {
let mut settings = self.settings.lock().unwrap();
settings.movie_timescale = value.get().expect("type checked upstream");
}
_ => unimplemented!(),
}
}
fn property(&self, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
match pspec.name() {
"fragment-duration" => {
let settings = self.settings.lock().unwrap();
settings.fragment_duration.to_value()
}
"chunk-duration" => {
let settings = self.settings.lock().unwrap();
settings.chunk_duration.to_value()
}
"header-update-mode" => {
let settings = self.settings.lock().unwrap();
settings.header_update_mode.to_value()
}
"write-mfra" => {
let settings = self.settings.lock().unwrap();
settings.write_mfra.to_value()
}
"write-mehd" => {
let settings = self.settings.lock().unwrap();
settings.write_mehd.to_value()
}
"interleave-bytes" => {
let settings = self.settings.lock().unwrap();
settings.interleave_bytes.unwrap_or(0).to_value()
}
"interleave-time" => {
let settings = self.settings.lock().unwrap();
settings.interleave_time.to_value()
}
"movie-timescale" => {
let settings = self.settings.lock().unwrap();
settings.movie_timescale.to_value()
}
_ => unimplemented!(),
}
}
fn constructed(&self) {
self.parent_constructed();
let obj = self.obj();
let class = obj.class();
for templ in class.pad_template_list().into_iter().filter(|templ| {
templ.presence() == gst::PadPresence::Always
&& templ.direction() == gst::PadDirection::Sink
}) {
let sinkpad =
gst::PadBuilder::<gst_base::AggregatorPad>::from_template(&templ, Some("sink"))
.flags(gst::PadFlags::ACCEPT_INTERSECT)
.build();
obj.add_pad(&sinkpad).unwrap();
}
obj.set_latency(Settings::default().fragment_duration, None);
}
}
impl GstObjectImpl for FMP4Mux {}
impl ElementImpl for FMP4Mux {
fn request_new_pad(
&self,
templ: &gst::PadTemplate,
name: Option<&str>,
caps: Option<&gst::Caps>,
) -> Option<gst::Pad> {
let state = self.state.lock().unwrap();
if state.stream_header.is_some() {
gst::error!(
CAT,
imp: self,
"Can't request new pads after header was generated"
);
return None;
}
self.parent_request_new_pad(templ, name, caps)
}
}
impl AggregatorImpl for FMP4Mux {
fn next_time(&self) -> Option<gst::ClockTime> {
let state = self.state.lock().unwrap();
state.chunk_start_pts.opt_add(state.timeout_delay)
}
fn sink_query(
&self,
aggregator_pad: &gst_base::AggregatorPad,
query: &mut gst::QueryRef,
) -> bool {
use gst::QueryViewMut;
gst::trace!(CAT, obj: aggregator_pad, "Handling query {:?}", query);
match query.view_mut() {
QueryViewMut::Caps(q) => {
let allowed_caps = aggregator_pad
.current_caps()
.unwrap_or_else(|| aggregator_pad.pad_template_caps());
if let Some(filter_caps) = q.filter() {
let res = filter_caps
.intersect_with_mode(&allowed_caps, gst::CapsIntersectMode::First);
q.set_result(&res);
} else {
q.set_result(&allowed_caps);
}
true
}
_ => self.parent_sink_query(aggregator_pad, query),
}
}
fn sink_event_pre_queue(
&self,
aggregator_pad: &gst_base::AggregatorPad,
mut event: gst::Event,
) -> Result<gst::FlowSuccess, gst::FlowError> {
use gst::EventView;
gst::trace!(CAT, obj: aggregator_pad, "Handling event {:?}", event);
match event.view() {
EventView::Segment(ev) => {
if ev.segment().format() != gst::Format::Time {
gst::warning!(
CAT,
obj: aggregator_pad,
"Received non-TIME segment, replacing with default TIME segment"
);
let segment = gst::FormattedSegment::<gst::ClockTime>::new();
event = gst::event::Segment::builder(&segment)
.seqnum(event.seqnum())
.build();
}
self.parent_sink_event_pre_queue(aggregator_pad, event)
}
_ => self.parent_sink_event_pre_queue(aggregator_pad, event),
}
}
fn sink_event(&self, aggregator_pad: &gst_base::AggregatorPad, event: gst::Event) -> bool {
use gst::EventView;
gst::trace!(CAT, obj: aggregator_pad, "Handling event {:?}", event);
match event.view() {
EventView::Segment(ev) => {
// Already fixed-up above to always be a TIME segment
let segment = ev
.segment()
.clone()
.downcast::<gst::ClockTime>()
.expect("non-TIME segment");
gst::info!(CAT, obj: aggregator_pad, "Received segment {:?}", segment);
// Only forward the segment event verbatim if this is a single stream variant.
// Otherwise we have to produce a default segment and re-timestamp all buffers
// with their running time.
let aggregator = self.obj();
let class = aggregator.class();
if class.as_ref().variant.is_single_stream() {
aggregator.update_segment(&segment);
}
self.parent_sink_event(aggregator_pad, event)
}
EventView::Tag(_ev) => {
// TODO: Maybe store for putting into the headers of the next fragment?
self.parent_sink_event(aggregator_pad, event)
}
_ => self.parent_sink_event(aggregator_pad, event),
}
}
fn src_query(&self, query: &mut gst::QueryRef) -> bool {
use gst::QueryViewMut;
gst::trace!(CAT, imp: self, "Handling query {:?}", query);
match query.view_mut() {
QueryViewMut::Seeking(q) => {
// We can't really handle seeking, it would break everything
q.set(false, gst::ClockTime::ZERO, gst::ClockTime::NONE);
true
}
_ => self.parent_src_query(query),
}
}
fn src_event(&self, event: gst::Event) -> bool {
use gst::EventView;
gst::trace!(CAT, imp: self, "Handling event {:?}", event);
match event.view() {
EventView::Seek(_ev) => false,
_ => self.parent_src_event(event),
}
}
fn flush(&self) -> Result<gst::FlowSuccess, gst::FlowError> {
let mut state = self.state.lock().unwrap();
for stream in &mut state.streams {
stream.queued_gops.clear();
stream.dts_offset = None;
stream.current_position = gst::ClockTime::ZERO;
stream.fragment_filled = false;
stream.pre_queue.clear();
stream.running_time_utc_time_mapping = None;
}
state.current_offset = 0;
state.fragment_offsets.clear();
drop(state);
self.parent_flush()
}
fn stop(&self) -> Result<(), gst::ErrorMessage> {
gst::trace!(CAT, imp: self, "Stopping");
let _ = self.parent_stop();
*self.state.lock().unwrap() = State::default();
Ok(())
}
fn start(&self) -> Result<(), gst::ErrorMessage> {
gst::trace!(CAT, imp: self, "Starting");
self.parent_start()?;
// For non-single-stream variants configure a default segment that allows for negative
// DTS so that we can correctly re-timestamp buffers with their running times.
let aggregator = self.obj();
let class = aggregator.class();
if !class.as_ref().variant.is_single_stream() {
let mut segment = gst::FormattedSegment::<gst::ClockTime>::new();
segment.set_start(SEGMENT_OFFSET);
segment.set_position(SEGMENT_OFFSET);
aggregator.update_segment(&segment);
}
*self.state.lock().unwrap() = State::default();
Ok(())
}
fn negotiate(&self) -> bool {
true
}
fn aggregate(&self, timeout: bool) -> Result<gst::FlowSuccess, gst::FlowError> {
let settings = self.settings.lock().unwrap().clone();
let all_eos;
let mut caps = None;
let mut buffers = vec![];
let mut upstream_events = vec![];
let res = {
let mut state = self.state.lock().unwrap();
// Create streams
if state.streams.is_empty() {
self.create_streams(&mut state)?;
}
self.queue_available_buffers(&mut state, &settings, timeout)?;
all_eos = state.streams.iter().all(|stream| stream.sinkpad.is_eos());
if all_eos {
gst::debug!(CAT, imp: self, "All streams are EOS now");
let fragment_start_pts = state.fragment_start_pts;
let chunk_start_pts = state.chunk_start_pts;
for stream in &mut state.streams {
// Check if this stream is filled enough now that everything is EOS.
self.check_stream_filled(
&settings,
stream,
fragment_start_pts,
chunk_start_pts,
true,
);
}
}
// Calculate the earliest PTS, i.e. the start of the first fragment, if not known yet.
self.calculate_earliest_pts(
&settings,
&mut state,
&mut upstream_events,
all_eos,
timeout,
);
// Drain everything that can be drained at this point
self.drain(
&mut state,
&settings,
all_eos,
timeout,
&mut caps,
&mut buffers,
&mut upstream_events,
)
};
for (sinkpad, event) in upstream_events {
sinkpad.push_event(event);
}
if let Some(caps) = caps {
gst::debug!(CAT, imp: self, "Setting caps on source pad: {:?}", caps);
self.obj().set_src_caps(&caps);
}
for buffer_list in buffers {
gst::trace!(CAT, imp: self, "Pushing buffer list {:?}", buffer_list);
self.obj().finish_buffer_list(buffer_list)?;
}
// If an error happened above while draining, return this now after pushing
// any output that was produced before the error.
res?;
if !all_eos {
return Ok(gst::FlowSuccess::Ok);
}
// Finish the stream.
self.finish(&settings);
Err(gst::FlowError::Eos)
}
}
#[repr(C)]
pub(crate) struct Class {
parent: gst_base::ffi::GstAggregatorClass,
variant: super::Variant,
}
unsafe impl ClassStruct for Class {
type Type = FMP4Mux;
}
impl std::ops::Deref for Class {
type Target = glib::Class<gst_base::Aggregator>;
fn deref(&self) -> &Self::Target {
unsafe { &*(&self.parent as *const _ as *const _) }
}
}
unsafe impl<T: FMP4MuxImpl> IsSubclassable<T> for super::FMP4Mux {
fn class_init(class: &mut glib::Class<Self>) {
Self::parent_class_init::<T>(class);
let class = class.as_mut();
class.variant = T::VARIANT;
}
}
pub(crate) trait FMP4MuxImpl: AggregatorImpl {
const VARIANT: super::Variant;
}
#[derive(Default)]
pub(crate) struct ISOFMP4Mux;
#[glib::object_subclass]
impl ObjectSubclass for ISOFMP4Mux {
const NAME: &'static str = "GstISOFMP4Mux";
type Type = super::ISOFMP4Mux;
type ParentType = super::FMP4Mux;
}
impl ObjectImpl for ISOFMP4Mux {
fn properties() -> &'static [glib::ParamSpec] {
static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
vec![glib::ParamSpecBoolean::builder("offset-to-zero")
.nick("Offset to Zero")
.blurb("Offsets all streams so that the earliest stream starts at 0")
.mutable_ready()
.build()]
});
&PROPERTIES
}
fn property(&self, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
let obj = self.obj();
let fmp4mux = obj.upcast_ref::<super::FMP4Mux>().imp();
match pspec.name() {
"offset-to-zero" => {
let settings = fmp4mux.settings.lock().unwrap();
settings.offset_to_zero.to_value()
}
_ => unimplemented!(),
}
}
fn set_property(&self, _id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
let obj = self.obj();
let fmp4mux = obj.upcast_ref::<super::FMP4Mux>().imp();
match pspec.name() {
"offset-to-zero" => {
let mut settings = fmp4mux.settings.lock().unwrap();
settings.offset_to_zero = value.get().expect("type checked upstream");
}
_ => unimplemented!(),
}
}
}
impl GstObjectImpl for ISOFMP4Mux {}
impl ElementImpl for ISOFMP4Mux {
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
gst::subclass::ElementMetadata::new(
"ISOFMP4Mux",
"Codec/Muxer",
"ISO fragmented MP4 muxer",
"Sebastian Dröge <sebastian@centricular.com>",
)
});
Some(&*ELEMENT_METADATA)
}
fn pad_templates() -> &'static [gst::PadTemplate] {
static PAD_TEMPLATES: Lazy<Vec<gst::PadTemplate>> = Lazy::new(|| {
let src_pad_template = gst::PadTemplate::new(
"src",
gst::PadDirection::Src,
gst::PadPresence::Always,
&gst::Caps::builder("video/quicktime")
.field("variant", "iso-fragmented")
.build(),
)
.unwrap();
let sink_pad_template = gst::PadTemplate::with_gtype(
"sink_%u",
gst::PadDirection::Sink,
gst::PadPresence::Request,
&[
gst::Structure::builder("video/x-h264")
.field("stream-format", gst::List::new(["avc", "avc3"]))
.field("alignment", "au")
.field("width", gst::IntRange::new(1, u16::MAX as i32))
.field("height", gst::IntRange::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("video/x-h265")
.field("stream-format", gst::List::new(["hvc1", "hev1"]))
.field("alignment", "au")
.field("width", gst::IntRange::new(1, u16::MAX as i32))
.field("height", gst::IntRange::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("video/x-vp9")
.field("profile", gst::List::new(["0", "1", "2", "3"]))
.field("chroma-format", gst::List::new(["4:2:0", "4:2:2", "4:4:4"]))
.field("bit-depth-luma", gst::List::new([8u32, 10u32, 12u32]))
.field("bit-depth-chroma", gst::List::new([8u32, 10u32, 12u32]))
.field("width", gst::IntRange::new(1, u16::MAX as i32))
.field("height", gst::IntRange::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("audio/mpeg")
.field("mpegversion", 4i32)
.field("stream-format", "raw")
.field("channels", gst::IntRange::new(1, u16::MAX as i32))
.field("rate", gst::IntRange::new(1, i32::MAX))
.build(),
gst::Structure::builder("audio/x-opus")
.field("channel-mapping-family", gst::IntRange::new(0i32, 255))
.field("channels", gst::IntRange::new(1i32, 8))
.field("rate", gst::IntRange::new(1, i32::MAX))
.build(),
]
.into_iter()
.collect::<gst::Caps>(),
super::FMP4MuxPad::static_type(),
)
.unwrap();
vec![src_pad_template, sink_pad_template]
});
PAD_TEMPLATES.as_ref()
}
}
impl AggregatorImpl for ISOFMP4Mux {}
impl FMP4MuxImpl for ISOFMP4Mux {
const VARIANT: super::Variant = super::Variant::ISO;
}
#[derive(Default)]
pub(crate) struct CMAFMux;
#[glib::object_subclass]
impl ObjectSubclass for CMAFMux {
const NAME: &'static str = "GstCMAFMux";
type Type = super::CMAFMux;
type ParentType = super::FMP4Mux;
}
impl ObjectImpl for CMAFMux {}
impl GstObjectImpl for CMAFMux {}
impl ElementImpl for CMAFMux {
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
gst::subclass::ElementMetadata::new(
"CMAFMux",
"Codec/Muxer",
"CMAF fragmented MP4 muxer",
"Sebastian Dröge <sebastian@centricular.com>",
)
});
Some(&*ELEMENT_METADATA)
}
fn pad_templates() -> &'static [gst::PadTemplate] {
static PAD_TEMPLATES: Lazy<Vec<gst::PadTemplate>> = Lazy::new(|| {
let src_pad_template = gst::PadTemplate::new(
"src",
gst::PadDirection::Src,
gst::PadPresence::Always,
&gst::Caps::builder("video/quicktime")
.field("variant", "cmaf")
.build(),
)
.unwrap();
let sink_pad_template = gst::PadTemplate::with_gtype(
"sink",
gst::PadDirection::Sink,
gst::PadPresence::Always,
&[
gst::Structure::builder("video/x-h264")
.field("stream-format", gst::List::new(["avc", "avc3"]))
.field("alignment", "au")
.field("width", gst::IntRange::new(1, u16::MAX as i32))
.field("height", gst::IntRange::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("video/x-h265")
.field("stream-format", gst::List::new(["hvc1", "hev1"]))
.field("alignment", "au")
.field("width", gst::IntRange::new(1, u16::MAX as i32))
.field("height", gst::IntRange::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("audio/mpeg")
.field("mpegversion", 4i32)
.field("stream-format", "raw")
.field("channels", gst::IntRange::new(1, u16::MAX as i32))
.field("rate", gst::IntRange::new(1, i32::MAX))
.build(),
]
.into_iter()
.collect::<gst::Caps>(),
super::FMP4MuxPad::static_type(),
)
.unwrap();
vec![src_pad_template, sink_pad_template]
});
PAD_TEMPLATES.as_ref()
}
}
impl AggregatorImpl for CMAFMux {}
impl FMP4MuxImpl for CMAFMux {
const VARIANT: super::Variant = super::Variant::CMAF;
}
#[derive(Default)]
pub(crate) struct DASHMP4Mux;
#[glib::object_subclass]
impl ObjectSubclass for DASHMP4Mux {
const NAME: &'static str = "GstDASHMP4Mux";
type Type = super::DASHMP4Mux;
type ParentType = super::FMP4Mux;
}
impl ObjectImpl for DASHMP4Mux {}
impl GstObjectImpl for DASHMP4Mux {}
impl ElementImpl for DASHMP4Mux {
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
gst::subclass::ElementMetadata::new(
"DASHMP4Mux",
"Codec/Muxer",
"DASH fragmented MP4 muxer",
"Sebastian Dröge <sebastian@centricular.com>",
)
});
Some(&*ELEMENT_METADATA)
}
fn pad_templates() -> &'static [gst::PadTemplate] {
static PAD_TEMPLATES: Lazy<Vec<gst::PadTemplate>> = Lazy::new(|| {
let src_pad_template = gst::PadTemplate::new(
"src",
gst::PadDirection::Src,
gst::PadPresence::Always,
&gst::Caps::builder("video/quicktime")
.field("variant", "iso-fragmented")
.build(),
)
.unwrap();
let sink_pad_template = gst::PadTemplate::with_gtype(
"sink",
gst::PadDirection::Sink,
gst::PadPresence::Always,
&[
gst::Structure::builder("video/x-h264")
.field("stream-format", gst::List::new(["avc", "avc3"]))
.field("alignment", "au")
.field("width", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.field("height", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("video/x-h265")
.field("stream-format", gst::List::new(["hvc1", "hev1"]))
.field("alignment", "au")
.field("width", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.field("height", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("video/x-vp9")
.field("profile", gst::List::new(["0", "1", "2", "3"]))
.field("chroma-format", gst::List::new(["4:2:0", "4:2:2", "4:4:4"]))
.field("bit-depth-luma", gst::List::new([8u32, 10u32, 12u32]))
.field("bit-depth-chroma", gst::List::new([8u32, 10u32, 12u32]))
.field("width", gst::IntRange::new(1, u16::MAX as i32))
.field("height", gst::IntRange::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("audio/mpeg")
.field("mpegversion", 4i32)
.field("stream-format", "raw")
.field("channels", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.field("rate", gst::IntRange::<i32>::new(1, i32::MAX))
.build(),
gst::Structure::builder("audio/x-opus")
.field("channel-mapping-family", gst::IntRange::new(0i32, 255))
.field("channels", gst::IntRange::new(1i32, 8))
.field("rate", gst::IntRange::new(1, i32::MAX))
.build(),
]
.into_iter()
.collect::<gst::Caps>(),
super::FMP4MuxPad::static_type(),
)
.unwrap();
vec![src_pad_template, sink_pad_template]
});
PAD_TEMPLATES.as_ref()
}
}
impl AggregatorImpl for DASHMP4Mux {}
impl FMP4MuxImpl for DASHMP4Mux {
const VARIANT: super::Variant = super::Variant::DASH;
}
#[derive(Default)]
pub(crate) struct ONVIFFMP4Mux;
#[glib::object_subclass]
impl ObjectSubclass for ONVIFFMP4Mux {
const NAME: &'static str = "GstONVIFFMP4Mux";
type Type = super::ONVIFFMP4Mux;
type ParentType = super::FMP4Mux;
}
impl ObjectImpl for ONVIFFMP4Mux {}
impl GstObjectImpl for ONVIFFMP4Mux {}
impl ElementImpl for ONVIFFMP4Mux {
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
gst::subclass::ElementMetadata::new(
"ONVIFFMP4Mux",
"Codec/Muxer",
"ONVIF fragmented MP4 muxer",
"Sebastian Dröge <sebastian@centricular.com>",
)
});
Some(&*ELEMENT_METADATA)
}
fn pad_templates() -> &'static [gst::PadTemplate] {
static PAD_TEMPLATES: Lazy<Vec<gst::PadTemplate>> = Lazy::new(|| {
let src_pad_template = gst::PadTemplate::new(
"src",
gst::PadDirection::Src,
gst::PadPresence::Always,
&gst::Caps::builder("video/quicktime")
.field("variant", "iso-fragmented")
.build(),
)
.unwrap();
let sink_pad_template = gst::PadTemplate::with_gtype(
"sink_%u",
gst::PadDirection::Sink,
gst::PadPresence::Request,
&[
gst::Structure::builder("video/x-h264")
.field("stream-format", gst::List::new(["avc", "avc3"]))
.field("alignment", "au")
.field("width", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.field("height", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("video/x-h265")
.field("stream-format", gst::List::new(["hvc1", "hev1"]))
.field("alignment", "au")
.field("width", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.field("height", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("image/jpeg")
.field("width", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.field("height", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.build(),
gst::Structure::builder("audio/mpeg")
.field("mpegversion", 4i32)
.field("stream-format", "raw")
.field("channels", gst::IntRange::<i32>::new(1, u16::MAX as i32))
.field("rate", gst::IntRange::<i32>::new(1, i32::MAX))
.build(),
gst::Structure::builder("audio/x-alaw")
.field("channels", gst::IntRange::<i32>::new(1, 2))
.field("rate", gst::IntRange::<i32>::new(1, i32::MAX))
.build(),
gst::Structure::builder("audio/x-mulaw")
.field("channels", gst::IntRange::<i32>::new(1, 2))
.field("rate", gst::IntRange::<i32>::new(1, i32::MAX))
.build(),
gst::Structure::builder("audio/x-adpcm")
.field("layout", "g726")
.field("channels", 1i32)
.field("rate", 8000i32)
.field("bitrate", gst::List::new([16000i32, 24000, 32000, 40000]))
.build(),
gst::Structure::builder("application/x-onvif-metadata")
.field("parsed", true)
.build(),
]
.into_iter()
.collect::<gst::Caps>(),
super::FMP4MuxPad::static_type(),
)
.unwrap();
vec![src_pad_template, sink_pad_template]
});
PAD_TEMPLATES.as_ref()
}
}
impl AggregatorImpl for ONVIFFMP4Mux {}
impl FMP4MuxImpl for ONVIFFMP4Mux {
const VARIANT: super::Variant = super::Variant::ONVIF;
}
#[derive(Default, Clone)]
struct PadSettings {
trak_timescale: u32,
}
#[derive(Default)]
pub(crate) struct FMP4MuxPad {
settings: Mutex<PadSettings>,
}
#[glib::object_subclass]
impl ObjectSubclass for FMP4MuxPad {
const NAME: &'static str = "GstFMP4MuxPad";
type Type = super::FMP4MuxPad;
type ParentType = gst_base::AggregatorPad;
}
impl ObjectImpl for FMP4MuxPad {
fn properties() -> &'static [glib::ParamSpec] {
static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
vec![glib::ParamSpecUInt::builder("trak-timescale")
.nick("Track Timescale")
.blurb("Timescale to use for the track (units per second, 0 is automatic)")
.mutable_ready()
.build()]
});
&PROPERTIES
}
fn set_property(&self, _id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
match pspec.name() {
"trak-timescale" => {
let mut settings = self.settings.lock().unwrap();
settings.trak_timescale = value.get().expect("type checked upstream");
}
_ => unimplemented!(),
}
}
fn property(&self, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
match pspec.name() {
"trak-timescale" => {
let settings = self.settings.lock().unwrap();
settings.trak_timescale.to_value()
}
_ => unimplemented!(),
}
}
}
impl GstObjectImpl for FMP4MuxPad {}
impl PadImpl for FMP4MuxPad {}
impl AggregatorPadImpl for FMP4MuxPad {
fn flush(&self, aggregator: &gst_base::Aggregator) -> Result<gst::FlowSuccess, gst::FlowError> {
let mux = aggregator.downcast_ref::<super::FMP4Mux>().unwrap();
let mut mux_state = mux.imp().state.lock().unwrap();
for stream in &mut mux_state.streams {
if stream.sinkpad == *self.obj() {
stream.queued_gops.clear();
stream.dts_offset = None;
stream.current_position = gst::ClockTime::ZERO;
stream.fragment_filled = false;
stream.pre_queue.clear();
stream.running_time_utc_time_mapping = None;
break;
}
}
drop(mux_state);
self.parent_flush(aggregator)
}
}
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