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fmp4mux: Add support for writing out multiple tracks in the serialization code

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Not yet exposed from the element.
This commit is contained in:
Sebastian Dröge 2022-05-09 15:32:10 +03:00
parent c09b7b9e41
commit 31a32a7e2e
3 changed files with 337 additions and 102 deletions
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394
generic/fmp4/src/fmp4mux/boxes.rs
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@ -8,7 +8,7 @@
use gst::prelude::*;
use anyhow::{bail, Context, Error};
use anyhow::{anyhow, bail, Context, Error};
use super::Buffer;
@ -332,7 +332,7 @@ fn cmaf_brands_from_caps(caps: &gst::CapsRef, compatible_brands: &mut Vec<&'stat
fn brands_from_variant_and_caps(
variant: super::Variant,
caps: &gst::CapsRef,
caps: &[&gst::Caps],
) -> (&'static [u8; 4], Vec<&'static [u8; 4]>) {
match variant {
super::Variant::ISO => (b"iso6", vec![b"iso6"]),
@ -343,7 +343,8 @@ fn brands_from_variant_and_caps(
super::Variant::CMAF => {
let mut compatible_brands = vec![b"iso6", b"cmfc"];
cmaf_brands_from_caps(caps, &mut compatible_brands);
assert_eq!(caps.len(), 1);
cmaf_brands_from_caps(caps[0], &mut compatible_brands);
(b"cmf2", compatible_brands)
}
@ -383,7 +384,9 @@ fn write_moov(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), E
write_full_box(v, b"mvhd", FULL_BOX_VERSION_1, FULL_BOX_FLAGS_NONE, |v| {
write_mvhd(v, cfg, creation_time)
})?;
write_box(v, b"trak", |v| write_trak(v, cfg, creation_time))?;
for (idx, caps) in cfg.caps.iter().enumerate() {
write_box(v, b"trak", |v| write_trak(v, cfg, idx, caps, creation_time))?;
}
write_box(v, b"mvex", |v| write_mvex(v, cfg))?;
Ok(())
@ -427,8 +430,8 @@ fn write_mvhd(
v.extend(creation_time.to_be_bytes());
// Modification time
v.extend(creation_time.to_be_bytes());
// Timescale
v.extend(caps_to_timescale(cfg.caps).to_be_bytes());
// Timescale: uses the reference track timescale
v.extend(caps_to_timescale(cfg.caps[0]).to_be_bytes());
// Duration
v.extend(0u64.to_be_bytes());
@ -460,7 +463,7 @@ fn write_mvhd(
v.extend([0u8; 6 * 4]);
// Next track id
v.extend(2u32.to_be_bytes());
v.extend((cfg.caps.len() as u32 + 1).to_be_bytes());
Ok(())
}
@ -472,6 +475,8 @@ const TKHD_FLAGS_TRACK_IN_PREVIEW: u32 = 0x4;
fn write_trak(
v: &mut Vec<u8>,
cfg: &super::HeaderConfiguration,
idx: usize,
caps: &gst::CapsRef,
creation_time: u64,
) -> Result<(), Error> {
write_full_box(
@ -479,20 +484,22 @@ fn write_trak(
b"tkhd",
FULL_BOX_VERSION_1,
TKHD_FLAGS_TRACK_ENABLED | TKHD_FLAGS_TRACK_IN_MOVIE | TKHD_FLAGS_TRACK_IN_PREVIEW,
|v| write_tkhd(v, cfg, creation_time),
|v| write_tkhd(v, cfg, idx, caps, creation_time),
)?;
// TODO: write edts if necessary: for audio tracks to remove initialization samples
// TODO: write edts optionally for negative DTS instead of offsetting the DTS
write_box(v, b"mdia", |v| write_mdia(v, cfg, creation_time))?;
write_box(v, b"mdia", |v| write_mdia(v, cfg, caps, creation_time))?;
Ok(())
}
fn write_tkhd(
v: &mut Vec<u8>,
cfg: &super::HeaderConfiguration,
_cfg: &super::HeaderConfiguration,
idx: usize,
caps: &gst::CapsRef,
creation_time: u64,
) -> Result<(), Error> {
// Creation time
@ -500,7 +507,7 @@ fn write_tkhd(
// Modification time
v.extend(creation_time.to_be_bytes());
// Track ID
v.extend(1u32.to_be_bytes());
v.extend((idx as u32 + 1).to_be_bytes());
// Reserved
v.extend(0u32.to_be_bytes());
// Duration
@ -515,7 +522,7 @@ fn write_tkhd(
v.extend(0u16.to_be_bytes());
// Volume
let s = cfg.caps.structure(0).unwrap();
let s = caps.structure(0).unwrap();
match s.name() {
"audio/mpeg" => v.extend((1u16 << 8).to_be_bytes()),
_ => v.extend(0u16.to_be_bytes()),
@ -572,18 +579,19 @@ fn write_tkhd(
fn write_mdia(
v: &mut Vec<u8>,
cfg: &super::HeaderConfiguration,
caps: &gst::CapsRef,
creation_time: u64,
) -> Result<(), Error> {
write_full_box(v, b"mdhd", FULL_BOX_VERSION_1, FULL_BOX_FLAGS_NONE, |v| {
write_mdhd(v, cfg, creation_time)
write_mdhd(v, cfg, caps, creation_time)
})?;
write_full_box(v, b"hdlr", FULL_BOX_VERSION_0, FULL_BOX_FLAGS_NONE, |v| {
write_hdlr(v, cfg)
write_hdlr(v, cfg, caps)
})?;
// TODO: write elng if needed
write_box(v, b"minf", |v| write_minf(v, cfg))?;
write_box(v, b"minf", |v| write_minf(v, cfg, caps))?;
Ok(())
}
@ -601,7 +609,8 @@ fn language_code(lang: impl std::borrow::Borrow<[u8; 3]>) -> u16 {
fn write_mdhd(
v: &mut Vec<u8>,
cfg: &super::HeaderConfiguration,
_cfg: &super::HeaderConfiguration,
caps: &gst::CapsRef,
creation_time: u64,
) -> Result<(), Error> {
// Creation time
@ -609,7 +618,7 @@ fn write_mdhd(
// Modification time
v.extend(creation_time.to_be_bytes());
// Timescale
v.extend(caps_to_timescale(cfg.caps).to_be_bytes());
v.extend(caps_to_timescale(caps).to_be_bytes());
// Duration
v.extend(0u64.to_be_bytes());
@ -623,11 +632,15 @@ fn write_mdhd(
Ok(())
}
fn write_hdlr(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), Error> {
fn write_hdlr(
v: &mut Vec<u8>,
_cfg: &super::HeaderConfiguration,
caps: &gst::CapsRef,
) -> Result<(), Error> {
// Pre-defined
v.extend([0u8; 4]);
let s = cfg.caps.structure(0).unwrap();
let s = caps.structure(0).unwrap();
let (handler_type, name) = match s.name() {
"video/x-h264" | "video/x-h265" => (b"vide", b"VideoHandler\0"),
"audio/mpeg" => (b"soun", b"SoundHandler\0"),
@ -646,8 +659,12 @@ fn write_hdlr(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), E
Ok(())
}
fn write_minf(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), Error> {
let s = cfg.caps.structure(0).unwrap();
fn write_minf(
v: &mut Vec<u8>,
cfg: &super::HeaderConfiguration,
caps: &gst::CapsRef,
) -> Result<(), Error> {
let s = caps.structure(0).unwrap();
match s.name() {
"video/x-h264" | "video/x-h265" => {
@ -662,7 +679,7 @@ fn write_minf(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), E
write_box(v, b"dinf", |v| write_dinf(v, cfg))?;
write_box(v, b"stbl", |v| write_stbl(v, cfg))?;
write_box(v, b"stbl", |v| write_stbl(v, cfg, caps))?;
Ok(())
}
@ -712,9 +729,13 @@ fn write_dref(v: &mut Vec<u8>, _cfg: &super::HeaderConfiguration) -> Result<(),
Ok(())
}
fn write_stbl(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), Error> {
fn write_stbl(
v: &mut Vec<u8>,
cfg: &super::HeaderConfiguration,
caps: &gst::CapsRef,
) -> Result<(), Error> {
write_full_box(v, b"stsd", FULL_BOX_VERSION_0, FULL_BOX_FLAGS_NONE, |v| {
write_stsd(v, cfg)
write_stsd(v, cfg, caps)
})?;
write_full_box(v, b"stts", FULL_BOX_VERSION_0, FULL_BOX_FLAGS_NONE, |v| {
write_stts(v, cfg)
@ -731,7 +752,7 @@ fn write_stbl(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), E
})?;
// For video write a sync sample box as indication that not all samples are sync samples
let s = cfg.caps.structure(0).unwrap();
let s = caps.structure(0).unwrap();
match s.name() {
"video/x-h264" | "video/x-h265" => {
write_full_box(v, b"stss", FULL_BOX_VERSION_0, FULL_BOX_FLAGS_NONE, |v| {
@ -744,14 +765,18 @@ fn write_stbl(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), E
Ok(())
}
fn write_stsd(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), Error> {
fn write_stsd(
v: &mut Vec<u8>,
cfg: &super::HeaderConfiguration,
caps: &gst::CapsRef,
) -> Result<(), Error> {
// Entry count
v.extend(1u32.to_be_bytes());
let s = cfg.caps.structure(0).unwrap();
let s = caps.structure(0).unwrap();
match s.name() {
"video/x-h264" | "video/x-h265" => write_visual_sample_entry(v, cfg)?,
"audio/mpeg" => write_audio_sample_entry(v, cfg)?,
"video/x-h264" | "video/x-h265" => write_visual_sample_entry(v, cfg, caps)?,
"audio/mpeg" => write_audio_sample_entry(v, cfg, caps)?,
_ => unreachable!(),
}
@ -776,9 +801,10 @@ fn write_sample_entry_box<T, F: FnOnce(&mut Vec<u8>) -> Result<T, Error>>(
fn write_visual_sample_entry(
v: &mut Vec<u8>,
cfg: &super::HeaderConfiguration,
_cfg: &super::HeaderConfiguration,
caps: &gst::CapsRef,
) -> Result<(), Error> {
let s = cfg.caps.structure(0).unwrap();
let s = caps.structure(0).unwrap();
let fourcc = match s.name() {
"video/x-h264" => {
let stream_format = s.get::<&str>("stream-format").context("no stream-format")?;
@ -946,7 +972,7 @@ fn write_visual_sample_entry(
#[cfg(feature = "v1_18")]
{
if let Ok(cll) = gst_video::VideoContentLightLevel::from_caps(cfg.caps) {
if let Ok(cll) = gst_video::VideoContentLightLevel::from_caps(caps) {
write_box(v, b"clli", move |v| {
v.extend((cll.max_content_light_level() as u16).to_be_bytes());
v.extend((cll.max_frame_average_light_level() as u16).to_be_bytes());
@ -954,7 +980,7 @@ fn write_visual_sample_entry(
})?;
}
if let Ok(mastering) = gst_video::VideoMasteringDisplayInfo::from_caps(cfg.caps) {
if let Ok(mastering) = gst_video::VideoMasteringDisplayInfo::from_caps(caps) {
write_box(v, b"mdcv", move |v| {
for primary in mastering.display_primaries() {
v.extend(primary.x.to_be_bytes());
@ -979,9 +1005,10 @@ fn write_visual_sample_entry(
fn write_audio_sample_entry(
v: &mut Vec<u8>,
cfg: &super::HeaderConfiguration,
_cfg: &super::HeaderConfiguration,
caps: &gst::CapsRef,
) -> Result<(), Error> {
let s = cfg.caps.structure(0).unwrap();
let s = caps.structure(0).unwrap();
let fourcc = match s.name() {
"audio/mpeg" => b"mp4a",
_ => unreachable!(),
@ -1211,15 +1238,18 @@ fn write_mvex(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), E
}
}
write_full_box(v, b"trex", FULL_BOX_VERSION_0, FULL_BOX_FLAGS_NONE, |v| {
write_trex(v, cfg)
})?;
for (idx, _caps) in cfg.caps.iter().enumerate() {
write_full_box(v, b"trex", FULL_BOX_VERSION_0, FULL_BOX_FLAGS_NONE, |v| {
write_trex(v, cfg, idx)
})?;
}
Ok(())
}
fn write_mehd(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), Error> {
let timescale = caps_to_timescale(cfg.caps);
// Use the reference track timescale
let timescale = caps_to_timescale(cfg.caps[0]);
let duration = cfg
.duration
@ -1233,9 +1263,9 @@ fn write_mehd(v: &mut Vec<u8>, cfg: &super::HeaderConfiguration) -> Result<(), E
Ok(())
}
fn write_trex(v: &mut Vec<u8>, _cfg: &super::HeaderConfiguration) -> Result<(), Error> {
fn write_trex(v: &mut Vec<u8>, _cfg: &super::HeaderConfiguration, idx: usize) -> Result<(), Error> {
// Track ID
v.extend(1u32.to_be_bytes());
v.extend((idx as u32 + 1).to_be_bytes());
// Default sample description index
v.extend(1u32.to_be_bytes());
@ -1276,7 +1306,7 @@ pub(super) fn create_fmp4_fragment_header(
let styp_len = v.len();
let data_offset_offset = write_box(&mut v, b"moof", |v| write_moof(v, &cfg))?;
let data_offset_offsets = write_box(&mut v, b"moof", |v| write_moof(v, &cfg))?;
let size = cfg
.buffers
@ -1293,19 +1323,38 @@ pub(super) fn create_fmp4_fragment_header(
}
let data_offset = v.len() - styp_len;
v[data_offset_offset..][..4].copy_from_slice(&(data_offset as u32).to_be_bytes());
for data_offset_offset in data_offset_offsets {
let val = u32::from_be_bytes(v[data_offset_offset..][..4].try_into()?)
.checked_add(u32::try_from(data_offset)?)
.ok_or_else(|| anyhow!("can't calculate track run data offset"))?;
v[data_offset_offset..][..4].copy_from_slice(&val.to_be_bytes());
}
Ok((gst::Buffer::from_mut_slice(v), styp_len as u64))
}
#[allow(clippy::too_many_arguments)]
fn write_moof(v: &mut Vec<u8>, cfg: &super::FragmentHeaderConfiguration) -> Result<usize, Error> {
fn write_moof(
v: &mut Vec<u8>,
cfg: &super::FragmentHeaderConfiguration,
) -> Result<Vec<usize>, Error> {
write_full_box(v, b"mfhd", FULL_BOX_VERSION_0, FULL_BOX_FLAGS_NONE, |v| {
write_mfhd(v, cfg)
})?;
let data_offset_offset = write_box(v, b"traf", |v| write_traf(v, cfg))?;
Ok(data_offset_offset)
let mut data_offset_offsets = vec![];
for (idx, caps) in cfg.caps.iter().enumerate() {
// Skip tracks without any buffers for this fragment.
if cfg.timing_infos[idx].is_none() {
continue;
}
write_box(v, b"traf", |v| {
write_traf(v, cfg, &mut data_offset_offsets, idx, caps)
})?;
}
Ok(data_offset_offsets)
}
fn write_mfhd(v: &mut Vec<u8>, cfg: &super::FragmentHeaderConfiguration) -> Result<(), Error> {
@ -1407,6 +1456,7 @@ const SAMPLE_COMPOSITION_TIME_OFFSET_PRESENT: u32 = 0x8_00;
#[allow(clippy::type_complexity)]
fn analyze_buffers(
cfg: &super::FragmentHeaderConfiguration,
idx: usize,
check_dts: bool,
intra_only: bool,
timescale: u32,
@ -1438,7 +1488,13 @@ fn analyze_buffers(
let mut negative_composition_time_offsets = false;
for Buffer { buffer, pts, dts } in cfg.buffers {
for Buffer {
idx: _idx,
buffer,
pts,
dts,
} in cfg.buffers.iter().filter(|b| b.idx == idx)
{
if size.is_none() {
size = Some(buffer.size() as u32);
}
@ -1495,10 +1551,11 @@ fn analyze_buffers(
// Check duration of the last buffer against end_pts / end_dts
{
let timing_info = cfg.timing_infos[idx].as_ref().unwrap();
let current_timestamp = if check_dts {
cfg.end_dts.expect("no end DTS")
timing_info.end_dts.expect("no end DTS")
} else {
cfg.end_pts
timing_info.end_pts
};
let current_timestamp = current_timestamp
.nseconds()
@ -1546,9 +1603,16 @@ fn analyze_buffers(
))
}
fn write_traf(v: &mut Vec<u8>, cfg: &super::FragmentHeaderConfiguration) -> Result<usize, Error> {
let s = cfg.caps.structure(0).unwrap();
let timescale = caps_to_timescale(cfg.caps);
#[allow(clippy::ptr_arg)]
fn write_traf(
v: &mut Vec<u8>,
cfg: &super::FragmentHeaderConfiguration,
data_offset_offsets: &mut Vec<usize>,
idx: usize,
caps: &gst::CapsRef,
) -> Result<(), Error> {
let s = caps.structure(0).unwrap();
let timescale = caps_to_timescale(caps);
let check_dts = matches!(s.name(), "video/x-h264" | "video/x-h265");
let intra_only = matches!(s.name(), "audio/mpeg");
@ -1562,45 +1626,95 @@ fn write_traf(v: &mut Vec<u8>, cfg: &super::FragmentHeaderConfiguration) -> Resu
default_duration,
default_flags,
negative_composition_time_offsets,
) = analyze_buffers(cfg, check_dts, intra_only, timescale)?;
) = analyze_buffers(cfg, idx, check_dts, intra_only, timescale)?;
assert!((tf_flags & DEFAULT_SAMPLE_SIZE_PRESENT == 0) ^ default_size.is_some());
assert!((tf_flags & DEFAULT_SAMPLE_DURATION_PRESENT == 0) ^ default_duration.is_some());
assert!((tf_flags & DEFAULT_SAMPLE_FLAGS_PRESENT == 0) ^ default_flags.is_some());
write_full_box(v, b"tfhd", FULL_BOX_VERSION_0, tf_flags, |v| {
write_tfhd(v, cfg, default_size, default_duration, default_flags)
write_tfhd(v, cfg, idx, default_size, default_duration, default_flags)
})?;
write_full_box(v, b"tfdt", FULL_BOX_VERSION_1, FULL_BOX_FLAGS_NONE, |v| {
write_tfdt(v, cfg, timescale)
write_tfdt(v, cfg, idx, timescale)
})?;
let data_offset_offset = write_full_box(
v,
b"trun",
if negative_composition_time_offsets {
FULL_BOX_VERSION_1
} else {
FULL_BOX_VERSION_0
},
tr_flags,
|v| write_trun(v, cfg, tr_flags, check_dts, intra_only, timescale),
)?;
let mut current_data_offset = 0;
let mut iter = GroupBy::new(cfg.buffers, |a: &Buffer, b: &Buffer| a.idx == b.idx);
while let Some(run) = iter.next() {
if run[0].idx != idx {
// FIXME: What to do with >4GB offsets?
current_data_offset = (current_data_offset as u64
+ run.iter().map(|b| b.buffer.size() as u64).sum::<u64>())
.try_into()?;
continue;
}
let last_end_timestamp =
if let Some(Buffer { pts, dts, .. }) = iter.as_slice().iter().find(|b| b.idx == idx) {
timestamp_from_pts_dts(*pts, *dts, check_dts, timescale)
.map(|(current_timestamp, _pts, _dts)| current_timestamp)?
} else {
let timing_info = cfg.timing_infos[idx].as_ref().unwrap();
let last_end_timestamp = if check_dts {
timing_info.end_dts.expect("no end DTS")
} else {
timing_info.end_pts
};
last_end_timestamp
.nseconds()
.mul_div_round(timescale as u64, gst::ClockTime::SECOND.nseconds())
.context("too big timestamp")?
};
let data_offset_offset = write_full_box(
v,
b"trun",
if negative_composition_time_offsets {
FULL_BOX_VERSION_1
} else {
FULL_BOX_VERSION_0
},
tr_flags,
|v| {
write_trun(
v,
cfg,
current_data_offset,
tr_flags,
check_dts,
intra_only,
timescale,
run,
last_end_timestamp,
)
},
)?;
data_offset_offsets.push(data_offset_offset);
// FIXME: What to do with >4GB offsets?
current_data_offset = (current_data_offset as u64
+ run.iter().map(|b| b.buffer.size() as u64).sum::<u64>())
.try_into()?;
}
// TODO: saio, saiz, sbgp, sgpd, subs?
Ok(data_offset_offset)
Ok(())
}
fn write_tfhd(
v: &mut Vec<u8>,
_cfg: &super::FragmentHeaderConfiguration,
idx: usize,
default_size: Option<u32>,
default_duration: Option<u32>,
default_flags: Option<u32>,
) -> Result<(), Error> {
// Track ID
v.extend(1u32.to_be_bytes());
v.extend((idx as u32 + 1).to_be_bytes());
// No base data offset, no sample description index
@ -1622,11 +1736,14 @@ fn write_tfhd(
fn write_tfdt(
v: &mut Vec<u8>,
cfg: &super::FragmentHeaderConfiguration,
idx: usize,
timescale: u32,
) -> Result<(), Error> {
let base_time = cfg
let timing_info = cfg.timing_infos[idx].as_ref().unwrap();
let base_time = timing_info
.start_dts
.unwrap_or(cfg.earliest_pts)
.unwrap_or(timing_info.earliest_pts)
.mul_div_floor(timescale as u64, gst::ClockTime::SECOND.nseconds())
.context("base time overflow")?;
@ -1638,43 +1755,44 @@ fn write_tfdt(
#[allow(clippy::too_many_arguments)]
fn write_trun(
v: &mut Vec<u8>,
cfg: &super::FragmentHeaderConfiguration,
_cfg: &super::FragmentHeaderConfiguration,
current_data_offset: u32,
tr_flags: u32,
check_dts: bool,
intra_only: bool,
timescale: u32,
buffers: &[Buffer],
last_end_timestamp: u64,
) -> Result<usize, Error> {
// Sample count
v.extend((cfg.buffers.len() as u32).to_be_bytes());
v.extend((buffers.len() as u32).to_be_bytes());
let data_offset_offset = v.len();
// Data offset, will be rewritten later
v.extend(0i32.to_be_bytes());
v.extend(current_data_offset.to_be_bytes());
if (tr_flags & FIRST_SAMPLE_FLAGS_PRESENT) != 0 {
v.extend(sample_flags_from_buffer(&cfg.buffers[0].buffer, intra_only).to_be_bytes());
v.extend(sample_flags_from_buffer(&buffers[0].buffer, intra_only).to_be_bytes());
}
let last_timestamp = if check_dts {
cfg.end_dts.expect("no end DTS")
} else {
cfg.end_pts
};
let last_timestamp = last_timestamp
.nseconds()
.mul_div_round(timescale as u64, gst::ClockTime::SECOND.nseconds())
.context("too big timestamp")?;
for (Buffer { buffer, pts, dts }, next_timestamp) in Iterator::zip(
cfg.buffers.iter(),
cfg.buffers
for (
Buffer {
idx: _idx,
buffer,
pts,
dts,
},
next_timestamp,
) in Iterator::zip(
buffers.iter(),
buffers
.iter()
.skip(1)
.map(|Buffer { pts, dts, .. }| {
timestamp_from_pts_dts(*pts, *dts, check_dts, timescale)
.map(|(current_timestamp, _pts, _dts)| current_timestamp)
})
.chain(Some(Ok(last_timestamp))),
.chain(Some(Ok(last_end_timestamp))),
) {
let next_timestamp = next_timestamp?;
@ -1765,3 +1883,103 @@ pub(crate) fn create_mfra(
Ok(gst::Buffer::from_mut_slice(v))
}
// Copy from std while this is still nightly-only
use std::fmt;
/// An iterator over slice in (non-overlapping) chunks separated by a predicate.
///
/// This struct is created by the [`group_by`] method on [slices].
///
/// [`group_by`]: slice::group_by
/// [slices]: slice
struct GroupBy<'a, T: 'a, P> {
slice: &'a [T],
predicate: P,
}
impl<'a, T: 'a, P> GroupBy<'a, T, P> {
fn new(slice: &'a [T], predicate: P) -> Self {
GroupBy { slice, predicate }
}
fn as_slice(&'a self) -> &'a [T] {
self.slice
}
}
impl<'a, T: 'a, P> Iterator for GroupBy<'a, T, P>
where
P: FnMut(&T, &T) -> bool,
{
type Item = &'a [T];
#[inline]
fn next(&mut self) -> Option<Self::Item> {
if self.slice.is_empty() {
None
} else {
let mut len = 1;
let mut iter = self.slice.windows(2);
while let Some([l, r]) = iter.next() {
if (self.predicate)(l, r) {
len += 1
} else {
break;
}
}
let (head, tail) = self.slice.split_at(len);
self.slice = tail;
Some(head)
}
}
#[inline]
fn size_hint(&self) -> (usize, Option<usize>) {
if self.slice.is_empty() {
(0, Some(0))
} else {
(1, Some(self.slice.len()))
}
}
#[inline]
fn last(mut self) -> Option<Self::Item> {
self.next_back()
}
}
impl<'a, T: 'a, P> DoubleEndedIterator for GroupBy<'a, T, P>
where
P: FnMut(&T, &T) -> bool,
{
#[inline]
fn next_back(&mut self) -> Option<Self::Item> {
if self.slice.is_empty() {
None
} else {
let mut len = 1;
let mut iter = self.slice.windows(2);
while let Some([l, r]) = iter.next_back() {
if (self.predicate)(l, r) {
len += 1
} else {
break;
}
}
let (head, tail) = self.slice.split_at(self.slice.len() - len);
self.slice = head;
Some(tail)
}
}
}
impl<'a, T: 'a, P> std::iter::FusedIterator for GroupBy<'a, T, P> where P: FnMut(&T, &T) -> bool {}
impl<'a, T: 'a + fmt::Debug, P> fmt::Debug for GroupBy<'a, T, P> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("GroupBy")
.field("slice", &self.slice)
.finish()
}
}

24
generic/fmp4/src/fmp4mux/imp.rs
View file

@ -255,7 +255,12 @@ impl FMP4Mux {
final_earliest_pts: intra_only,
end_pts,
end_dts,
buffers: vec![Buffer { buffer, pts, dts }],
buffers: vec![Buffer {
idx: 0,
buffer,
pts,
dts,
}],
};
state.queued_gops.push_front(gop);
@ -315,6 +320,7 @@ impl FMP4Mux {
gop.end_pts = std::cmp::max(gop.end_pts, end_pts);
gop.end_dts = Some(std::cmp::max(gop.end_dts.expect("no end DTS"), end_dts));
gop.buffers.push(Buffer {
idx: 0,
buffer,
pts,
dts: Some(dts),
@ -545,13 +551,15 @@ impl FMP4Mux {
boxes::create_fmp4_fragment_header(super::FragmentHeaderConfiguration {
variant: class.as_ref().variant,
sequence_number,
caps: state.caps.as_ref().unwrap(),
caps: &[state.caps.as_ref().unwrap()],
timing_infos: &[Some(super::FragmentTimingInfo {
earliest_pts,
start_dts,
end_pts,
end_dts,
dts_offset,
})],
buffers: &buffers,
earliest_pts,
start_dts,
end_pts,
end_dts,
dts_offset,
})
.map_err(|err| {
gst::error!(
@ -673,7 +681,7 @@ impl FMP4Mux {
let mut buffer = boxes::create_fmp4_header(super::HeaderConfiguration {
variant,
update: at_eos,
caps: state.caps.as_ref().unwrap(),
caps: &[state.caps.as_ref().unwrap()],
write_mehd: settings.write_mehd,
duration: if at_eos { duration } else { None },
})

21
generic/fmp4/src/fmp4mux/mod.rs
View file

@ -53,6 +53,8 @@ pub fn register(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
#[derive(Debug)]
pub(crate) struct Buffer {
/// Track index
idx: usize,
buffer: gst::Buffer,
// Running times
pts: gst::ClockTime,
@ -63,17 +65,15 @@ pub(crate) struct Buffer {
pub(crate) struct HeaderConfiguration<'a> {
variant: Variant,
update: bool,
caps: &'a gst::Caps,
/// First caps must be the video/reference stream. Must be in the order the tracks are going to
/// be used later for the fragments too.
caps: &'a [&'a gst::Caps],
write_mehd: bool,
duration: Option<gst::ClockTime>,
}
#[derive(Debug)]
pub(crate) struct FragmentHeaderConfiguration<'a> {
variant: Variant,
sequence_number: u32,
caps: &'a gst::Caps,
buffers: &'a [Buffer],
pub(crate) struct FragmentTimingInfo {
earliest_pts: gst::ClockTime,
start_dts: Option<gst::ClockTime>,
end_pts: gst::ClockTime,
@ -82,6 +82,15 @@ pub(crate) struct FragmentHeaderConfiguration<'a> {
dts_offset: Option<gst::ClockTime>,
}
#[derive(Debug)]
pub(crate) struct FragmentHeaderConfiguration<'a> {
variant: Variant,
sequence_number: u32,
caps: &'a [&'a gst::Caps],
timing_infos: &'a [Option<FragmentTimingInfo>],
buffers: &'a [Buffer],
}
#[allow(clippy::upper_case_acronyms)]
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub(crate) enum Variant {