[nihav.git] / nihav-core / src / demuxers / mod.rs

pub use crate::frame::*;
pub use crate::io::byteio::*;

#[derive(Debug,Clone,Copy,PartialEq)]
#[allow(dead_code)]
pub enum DemuxerError {
    EOF,
    NoSuchInput,
    InvalidData,
    IOError,
    NotImplemented,
    MemoryError,
    TryAgain,
    SeekError,
    NotPossible,
}

pub type DemuxerResult<T> = Result<T, DemuxerError>;

pub trait DemuxCore<'a> {
    fn open(&mut self, strmgr: &mut StreamManager, seek_idx: &mut SeekIndex) -> DemuxerResult<()>;
    fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket>;
    fn seek(&mut self, time: u64, seek_idx: &SeekIndex) -> DemuxerResult<()>;
}

pub trait NAPacketReader {
    fn read_packet(&mut self, str: NAStreamRef, ts: NATimeInfo, keyframe: bool, size: usize) -> DemuxerResult<NAPacket>;
    fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()>;
}

impl<'a> NAPacketReader for ByteReader<'a> {
    fn read_packet(&mut self, str: NAStreamRef, ts: NATimeInfo, kf: bool, size: usize) -> DemuxerResult<NAPacket> {
        let mut buf: Vec<u8> = Vec::with_capacity(size);
        if buf.capacity() < size { return Err(DemuxerError::MemoryError); }
        buf.resize(size, 0);
        self.read_buf(buf.as_mut_slice())?;
        let pkt = NAPacket::new(str, ts, kf, buf);
        Ok(pkt)
    }
    fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()> {
        let mut refbuf = pkt.get_buffer();
        let buf = refbuf.as_mut().unwrap();
        self.read_buf(buf.as_mut_slice())?;
        Ok(())
    }
}

#[derive(Default)]
pub struct StreamManager {
    streams: Vec<NAStreamRef>,
    ignored: Vec<bool>,
    no_ign:  bool,
}

impl StreamManager {
    pub fn new() -> Self {
        StreamManager {
            streams: Vec::new(),
            ignored: Vec::new(),
            no_ign:  true,
        }
    }
    pub fn iter(&self) -> StreamIter { StreamIter::new(&self.streams) }

    pub fn add_stream(&mut self, stream: NAStream) -> Option<usize> {
        let stream_num = self.streams.len();
        let mut str = stream.clone();
        str.set_num(stream_num);
        self.streams.push(str.into_ref());
        self.ignored.push(false);
        Some(stream_num)
    }
    pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
        if idx < self.streams.len() {
            Some(self.streams[idx].clone())
        } else {
            None
        }
    }
    pub fn get_stream_by_id(&self, id: u32) -> Option<NAStreamRef> {
        for i in 0..self.streams.len() {
            if self.streams[i].get_id() == id {
                return Some(self.streams[i].clone());
            }
        }
        None
    }
    pub fn get_num_streams(&self) -> usize { self.streams.len() }
    pub fn is_ignored(&self, idx: usize) -> bool {
        if self.no_ign {
            true
        } else if idx < self.ignored.len() {
            self.ignored[idx]
        } else {
            false
        }
    }
    pub fn is_ignored_id(&self, id: u32) -> bool {
        for i in 0..self.streams.len() {
            if self.streams[i].get_id() == id {
                return self.ignored[i];
            }
        }
        false
    }
    pub fn set_ignored(&mut self, idx: usize) {
        if idx < self.ignored.len() {
            self.ignored[idx] = true;
            self.no_ign = false;
        }
    }
    pub fn set_unignored(&mut self, idx: usize) {
        if idx < self.ignored.len() {
            self.ignored[idx] = false;
        }
    }
}

pub struct StreamIter<'a> {
    streams:    &'a [NAStreamRef],
    pos:        usize,
}

impl<'a> StreamIter<'a> {
    pub fn new(streams: &'a [NAStreamRef]) -> Self {
        StreamIter { streams, pos: 0 }
    }
}

impl<'a> Iterator for StreamIter<'a> {
    type Item = NAStreamRef;

    fn next(&mut self) -> Option<Self::Item> {
        if self.pos >= self.streams.len() { return None; }
        let ret = self.streams[self.pos].clone();
        self.pos += 1;
        Some(ret)
    }
}

#[derive(Clone,Copy,PartialEq)]
pub enum SeekIndexMode {
    None,
    Present,
    Automatic,
}

impl Default for SeekIndexMode {
    fn default() -> Self { SeekIndexMode::None }
}

#[derive(Clone,Copy,Default)]
pub struct SeekEntry {
    pub time:   u64, // in milliseconds
    pub pts:    u64,
    pub pos:    u64,
}

#[derive(Clone)]
pub struct StreamSeekInfo {
    pub id:         u32,
    pub filled:     bool,
    pub entries:    Vec<SeekEntry>,
}

impl StreamSeekInfo {
    pub fn new(id: u32) -> Self {
        Self {
            id,
            filled:     false,
            entries:    Vec::new(),
        }
    }
    pub fn add_entry(&mut self, entry: SeekEntry) {
        self.entries.push(entry);
    }
    pub fn find_pos(&self, time: u64) -> Option<SeekEntry> {
        if !self.entries.is_empty() {
// todo something faster like binary search
            let mut cand = None;
            for entry in self.entries.iter() {
                if entry.time <= time {
                    cand = Some(*entry);
                } else {
                    break;
                }
            }
            cand
        } else {
            None
        }
    }
}

#[derive(Clone,Copy,Default)]
pub struct SeekIndexResult {
    pub pts:        u64,
    pub pos:        u64,
    pub str_id:     u32,
}

#[derive(Default)]
pub struct SeekIndex {
    pub seek_info:  Vec<StreamSeekInfo>,
    pub mode:       SeekIndexMode,
    pub skip_index: bool,
}

impl SeekIndex {
    pub fn new() -> Self { Self::default() }
    pub fn add_stream(&mut self, id: u32) -> usize {
        let ret = self.stream_id_to_index(id);
        if ret.is_none() {
            self.seek_info.push(StreamSeekInfo::new(id));
            self.seek_info.len() - 1
        } else {
            ret.unwrap()
        }
    }
    pub fn stream_id_to_index(&self, id: u32) -> Option<usize> {
        for (idx, str) in self.seek_info.iter().enumerate() {
            if str.id == id {
                return Some(idx);
            }
        }
        None
    }
    pub fn get_stream_index(&mut self, id: u32) -> Option<&mut StreamSeekInfo> {
        for str in self.seek_info.iter_mut() {
            if str.id == id {
                return Some(str);
            }
        }
        None
    }
    pub fn add_entry(&mut self, id: u32, entry: SeekEntry) {
        let mut idx = self.stream_id_to_index(id);
        if idx.is_none() {
            idx = Some(self.add_stream(id));
        }
        self.seek_info[idx.unwrap()].add_entry(entry);
        self.seek_info[idx.unwrap()].filled = true;
    }
    pub fn find_pos(&self, time: u64) -> Option<SeekIndexResult> {
        let mut cand = None;
        for str in self.seek_info.iter() {
            if !str.filled { continue; }
            let res = str.find_pos(time);
            if res.is_none() { continue; }
            let res = res.unwrap();
            if cand.is_none() {
                cand = Some(SeekIndexResult { pts: res.pts, pos: res.pos, str_id: str.id });
            } else if let Some(entry) = cand {
                if res.pos < entry.pos {
                    cand = Some(SeekIndexResult { pts: res.pts, pos: res.pos, str_id: str.id });
                }
            }
        }
        cand
    }
}

pub struct Demuxer<'a> {
    dmx:        Box<dyn DemuxCore<'a> + 'a>,
    streams:    StreamManager,
    seek_idx:   SeekIndex,
}

impl<'a> Demuxer<'a> {
    fn new(dmx: Box<dyn DemuxCore<'a> + 'a>, str: StreamManager, seek_idx: SeekIndex) -> Self {
        Demuxer {
            dmx,
            streams:    str,
            seek_idx,
        }
    }
    pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
        self.streams.get_stream(idx)
    }
    pub fn get_stream_by_id(&self, id: u32) -> Option<NAStreamRef> {
        self.streams.get_stream_by_id(id)
    }
    pub fn get_num_streams(&self) -> usize {
        self.streams.get_num_streams()
    }
    pub fn get_streams(&self) -> StreamIter {
        self.streams.iter()
    }
    pub fn is_ignored_stream(&self, idx: usize) -> bool {
        self.streams.is_ignored(idx)
    }
    pub fn set_ignored_stream(&mut self, idx: usize) {
        self.streams.set_ignored(idx)
    }
    pub fn set_unignored_stream(&mut self, idx: usize) {
        self.streams.set_unignored(idx)
    }

    pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
        loop {
            let res = self.dmx.get_frame(&mut self.streams);
            if self.streams.no_ign || res.is_err() { return res; }
            let res = res.unwrap();
            let idx = res.get_stream().get_num();
            if !self.is_ignored_stream(idx) {
                return Ok(res);
            }
        }
    }
    pub fn seek(&mut self, time: u64) -> DemuxerResult<()> {
        if self.seek_idx.skip_index {
            return Err(DemuxerError::NotPossible);
        }
        self.dmx.seek(time, &self.seek_idx)
    }
    pub fn get_seek_index(&self) -> &SeekIndex {
        &self.seek_idx
    }
}

impl From<ByteIOError> for DemuxerError {
    fn from(_: ByteIOError) -> Self { DemuxerError::IOError }
}

///The structure used to create demuxers.
pub trait DemuxerCreator {
    /// Create new demuxer instance that will use `ByteReader` source as an input.
    fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a>;
    /// Get the name of current demuxer creator.
    fn get_name(&self) -> &'static str;
}

pub fn create_demuxer<'a>(dmxcr: &DemuxerCreator, br: &'a mut ByteReader<'a>) -> DemuxerResult<Demuxer<'a>> {
    let mut dmx = dmxcr.new_demuxer(br);
    let mut str = StreamManager::new();
    let mut seek_idx = SeekIndex::new();
    dmx.open(&mut str, &mut seek_idx)?;
    Ok(Demuxer::new(dmx, str, seek_idx))
}

#[derive(Default)]
pub struct RegisteredDemuxers {
    dmxs:   Vec<&'static DemuxerCreator>,
}

impl RegisteredDemuxers {
    pub fn new() -> Self {
        Self { dmxs: Vec::new() }
    }
    pub fn add_demuxer(&mut self, dmx: &'static DemuxerCreator) {
        self.dmxs.push(dmx);
    }
    pub fn find_demuxer(&self, name: &str) -> Option<&DemuxerCreator> {
        for &dmx in self.dmxs.iter() {
            if dmx.get_name() == name {
                return Some(dmx);
            }
        }
        None
    }
}
Commit	Line	Data
4e8b4f31 KS	1	pub use crate::frame::*;
4e8b4f31 KS	2	pub use crate::io::byteio::*;
5869fd63	3
b1be9318	4	#[derive(Debug,Clone,Copy,PartialEq)]
5869fd63 KS	5	#[allow(dead_code)]
	6	pub enum DemuxerError {
	7	EOF,
	8	NoSuchInput,
	9	InvalidData,
	10	IOError,
	11	NotImplemented,
	12	MemoryError,
fe07b469	13	TryAgain,
33b5a8f0 KS	14	SeekError,
33b5a8f0 KS	15	NotPossible,
5869fd63 KS	16	}
5869fd63 KS	17
5641dccf	18	pub type DemuxerResult<T> = Result<T, DemuxerError>;
5869fd63	19
bcfeae48	20	pub trait DemuxCore<'a> {
33b5a8f0	21	fn open(&mut self, strmgr: &mut StreamManager, seek_idx: &mut SeekIndex) -> DemuxerResult<()>;
bcfeae48	22	fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket>;
33b5a8f0	23	fn seek(&mut self, time: u64, seek_idx: &SeekIndex) -> DemuxerResult<()>;
5869fd63 KS	24	}
5869fd63 KS	25
8869d452	26	pub trait NAPacketReader {
70910ac3	27	fn read_packet(&mut self, str: NAStreamRef, ts: NATimeInfo, keyframe: bool, size: usize) -> DemuxerResult<NAPacket>;
5869fd63 KS	28	fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()>;
	29	}
	30
8869d452	31	impl<'a> NAPacketReader for ByteReader<'a> {
70910ac3	32	fn read_packet(&mut self, str: NAStreamRef, ts: NATimeInfo, kf: bool, size: usize) -> DemuxerResult<NAPacket> {
5869fd63 KS	33	let mut buf: Vec<u8> = Vec::with_capacity(size);
	34	if buf.capacity() < size { return Err(DemuxerError::MemoryError); }
	35	buf.resize(size, 0);
e243ceb4	36	self.read_buf(buf.as_mut_slice())?;
e189501e	37	let pkt = NAPacket::new(str, ts, kf, buf);
5869fd63 KS	38	Ok(pkt)
	39	}
	40	fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()> {
	41	let mut refbuf = pkt.get_buffer();
1a967e6b	42	let buf = refbuf.as_mut().unwrap();
e243ceb4	43	self.read_buf(buf.as_mut_slice())?;
5869fd63 KS	44	Ok(())
	45	}
	46	}
	47
e243ceb4	48	#[derive(Default)]
bcfeae48	49	pub struct StreamManager {
70910ac3	50	streams: Vec<NAStreamRef>,
bcfeae48 KS	51	ignored: Vec<bool>,
bcfeae48 KS	52	no_ign: bool,
20ef4353 KS	53	}
20ef4353 KS	54
bcfeae48 KS	55	impl StreamManager {
	56	pub fn new() -> Self {
	57	StreamManager {
	58	streams: Vec::new(),
	59	ignored: Vec::new(),
	60	no_ign: true,
	61	}
	62	}
	63	pub fn iter(&self) -> StreamIter { StreamIter::new(&self.streams) }
	64
20ef4353 KS	65	pub fn add_stream(&mut self, stream: NAStream) -> Option<usize> {
	66	let stream_num = self.streams.len();
	67	let mut str = stream.clone();
	68	str.set_num(stream_num);
70910ac3	69	self.streams.push(str.into_ref());
bcfeae48	70	self.ignored.push(false);
20ef4353 KS	71	Some(stream_num)
20ef4353 KS	72	}
70910ac3	73	pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
20ef4353 KS	74	if idx < self.streams.len() {
	75	Some(self.streams[idx].clone())
	76	} else {
	77	None
	78	}
	79	}
70910ac3	80	pub fn get_stream_by_id(&self, id: u32) -> Option<NAStreamRef> {
20ef4353 KS	81	for i in 0..self.streams.len() {
	82	if self.streams[i].get_id() == id {
	83	return Some(self.streams[i].clone());
	84	}
	85	}
	86	None
	87	}
66116504	88	pub fn get_num_streams(&self) -> usize { self.streams.len() }
bcfeae48 KS	89	pub fn is_ignored(&self, idx: usize) -> bool {
	90	if self.no_ign {
	91	true
	92	} else if idx < self.ignored.len() {
	93	self.ignored[idx]
	94	} else {
	95	false
	96	}
	97	}
ce52b3b5 KS	98	pub fn is_ignored_id(&self, id: u32) -> bool {
	99	for i in 0..self.streams.len() {
	100	if self.streams[i].get_id() == id {
	101	return self.ignored[i];
	102	}
	103	}
	104	false
	105	}
bcfeae48 KS	106	pub fn set_ignored(&mut self, idx: usize) {
	107	if idx < self.ignored.len() {
	108	self.ignored[idx] = true;
	109	self.no_ign = false;
	110	}
	111	}
	112	pub fn set_unignored(&mut self, idx: usize) {
	113	if idx < self.ignored.len() {
	114	self.ignored[idx] = false;
	115	}
	116	}
	117	}
	118
	119	pub struct StreamIter<'a> {
e243ceb4	120	streams: &'a [NAStreamRef],
bcfeae48 KS	121	pos: usize,
	122	}
	123
	124	impl<'a> StreamIter<'a> {
e243ceb4 KS	125	pub fn new(streams: &'a [NAStreamRef]) -> Self {
e243ceb4 KS	126	StreamIter { streams, pos: 0 }
bcfeae48 KS	127	}
	128	}
	129
	130	impl<'a> Iterator for StreamIter<'a> {
70910ac3	131	type Item = NAStreamRef;
bcfeae48 KS	132
	133	fn next(&mut self) -> Option<Self::Item> {
	134	if self.pos >= self.streams.len() { return None; }
	135	let ret = self.streams[self.pos].clone();
	136	self.pos += 1;
	137	Some(ret)
	138	}
	139	}
	140
33b5a8f0 KS	141	#[derive(Clone,Copy,PartialEq)]
	142	pub enum SeekIndexMode {
	143	None,
	144	Present,
	145	Automatic,
	146	}
	147
	148	impl Default for SeekIndexMode {
	149	fn default() -> Self { SeekIndexMode::None }
	150	}
	151
	152	#[derive(Clone,Copy,Default)]
	153	pub struct SeekEntry {
4cfb5dd4	154	pub time: u64, // in milliseconds
33b5a8f0 KS	155	pub pts: u64,
	156	pub pos: u64,
	157	}
	158
	159	#[derive(Clone)]
	160	pub struct StreamSeekInfo {
	161	pub id: u32,
33b5a8f0 KS	162	pub filled: bool,
	163	pub entries: Vec<SeekEntry>,
	164	}
	165
	166	impl StreamSeekInfo {
4cfb5dd4	167	pub fn new(id: u32) -> Self {
33b5a8f0	168	Self {
4cfb5dd4	169	id,
33b5a8f0 KS	170	filled: false,
	171	entries: Vec::new(),
	172	}
	173	}
	174	pub fn add_entry(&mut self, entry: SeekEntry) {
	175	self.entries.push(entry);
	176	}
4cfb5dd4	177	pub fn find_pos(&self, time: u64) -> Option<SeekEntry> {
33b5a8f0 KS	178	if !self.entries.is_empty() {
33b5a8f0 KS	179	// todo something faster like binary search
4cfb5dd4 KS	180	let mut cand = None;
	181	for entry in self.entries.iter() {
	182	if entry.time <= time {
	183	cand = Some(*entry);
33b5a8f0 KS	184	} else {
	185	break;
	186	}
	187	}
4cfb5dd4	188	cand
33b5a8f0 KS	189	} else {
	190	None
	191	}
	192	}
	193	}
	194
	195	#[derive(Clone,Copy,Default)]
	196	pub struct SeekIndexResult {
	197	pub pts: u64,
	198	pub pos: u64,
	199	pub str_id: u32,
	200	}
	201
	202	#[derive(Default)]
	203	pub struct SeekIndex {
	204	pub seek_info: Vec<StreamSeekInfo>,
	205	pub mode: SeekIndexMode,
9da33f04	206	pub skip_index: bool,
33b5a8f0 KS	207	}
	208
	209	impl SeekIndex {
	210	pub fn new() -> Self { Self::default() }
6492988d KS	211	pub fn add_stream(&mut self, id: u32) -> usize {
	212	let ret = self.stream_id_to_index(id);
	213	if ret.is_none() {
4cfb5dd4	214	self.seek_info.push(StreamSeekInfo::new(id));
6492988d KS	215	self.seek_info.len() - 1
	216	} else {
	217	ret.unwrap()
33b5a8f0 KS	218	}
	219	}
	220	pub fn stream_id_to_index(&self, id: u32) -> Option<usize> {
	221	for (idx, str) in self.seek_info.iter().enumerate() {
	222	if str.id == id {
	223	return Some(idx);
	224	}
	225	}
	226	None
	227	}
4cfb5dd4 KS	228	pub fn get_stream_index(&mut self, id: u32) -> Option<&mut StreamSeekInfo> {
	229	for str in self.seek_info.iter_mut() {
	230	if str.id == id {
	231	return Some(str);
	232	}
	233	}
	234	None
	235	}
6492988d KS	236	pub fn add_entry(&mut self, id: u32, entry: SeekEntry) {
	237	let mut idx = self.stream_id_to_index(id);
	238	if idx.is_none() {
	239	idx = Some(self.add_stream(id));
	240	}
	241	self.seek_info[idx.unwrap()].add_entry(entry);
	242	self.seek_info[idx.unwrap()].filled = true;
	243	}
33b5a8f0 KS	244	pub fn find_pos(&self, time: u64) -> Option<SeekIndexResult> {
	245	let mut cand = None;
	246	for str in self.seek_info.iter() {
	247	if !str.filled { continue; }
4cfb5dd4 KS	248	let res = str.find_pos(time);
	249	if res.is_none() { continue; }
	250	let res = res.unwrap();
33b5a8f0	251	if cand.is_none() {
4cfb5dd4	252	cand = Some(SeekIndexResult { pts: res.pts, pos: res.pos, str_id: str.id });
33b5a8f0	253	} else if let Some(entry) = cand {
4cfb5dd4 KS	254	if res.pos < entry.pos {
4cfb5dd4 KS	255	cand = Some(SeekIndexResult { pts: res.pts, pos: res.pos, str_id: str.id });
33b5a8f0 KS	256	}
	257	}
	258	}
	259	cand
	260	}
	261	}
	262
bcfeae48	263	pub struct Demuxer<'a> {
6011e201	264	dmx: Box<dyn DemuxCore<'a> + 'a>,
bcfeae48	265	streams: StreamManager,
33b5a8f0	266	seek_idx: SeekIndex,
bcfeae48 KS	267	}
	268
	269	impl<'a> Demuxer<'a> {
33b5a8f0	270	fn new(dmx: Box<dyn DemuxCore<'a> + 'a>, str: StreamManager, seek_idx: SeekIndex) -> Self {
bcfeae48	271	Demuxer {
e243ceb4	272	dmx,
bcfeae48	273	streams: str,
33b5a8f0	274	seek_idx,
bcfeae48 KS	275	}
bcfeae48 KS	276	}
70910ac3	277	pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
bcfeae48 KS	278	self.streams.get_stream(idx)
bcfeae48 KS	279	}
70910ac3	280	pub fn get_stream_by_id(&self, id: u32) -> Option<NAStreamRef> {
bcfeae48 KS	281	self.streams.get_stream_by_id(id)
	282	}
	283	pub fn get_num_streams(&self) -> usize {
	284	self.streams.get_num_streams()
	285	}
	286	pub fn get_streams(&self) -> StreamIter {
	287	self.streams.iter()
	288	}
	289	pub fn is_ignored_stream(&self, idx: usize) -> bool {
	290	self.streams.is_ignored(idx)
	291	}
	292	pub fn set_ignored_stream(&mut self, idx: usize) {
	293	self.streams.set_ignored(idx)
	294	}
	295	pub fn set_unignored_stream(&mut self, idx: usize) {
	296	self.streams.set_unignored(idx)
	297	}
	298
	299	pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
	300	loop {
	301	let res = self.dmx.get_frame(&mut self.streams);
	302	if self.streams.no_ign \|\| res.is_err() { return res; }
	303	let res = res.unwrap();
	304	let idx = res.get_stream().get_num();
	305	if !self.is_ignored_stream(idx) {
	306	return Ok(res);
	307	}
	308	}
	309	}
	310	pub fn seek(&mut self, time: u64) -> DemuxerResult<()> {
9da33f04 KS	311	if self.seek_idx.skip_index {
	312	return Err(DemuxerError::NotPossible);
	313	}
33b5a8f0 KS	314	self.dmx.seek(time, &self.seek_idx)
	315	}
	316	pub fn get_seek_index(&self) -> &SeekIndex {
	317	&self.seek_idx
bcfeae48	318	}
5869fd63 KS	319	}
	320
	321	impl From<ByteIOError> for DemuxerError {
	322	fn from(_: ByteIOError) -> Self { DemuxerError::IOError }
	323	}
	324
3f7c7cfd	325	///The structure used to create demuxers.
eb71d98f	326	pub trait DemuxerCreator {
3f7c7cfd	327	/// Create new demuxer instance that will use `ByteReader` source as an input.
6011e201	328	fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a>;
3f7c7cfd	329	/// Get the name of current demuxer creator.
eb71d98f KS	330	fn get_name(&self) -> &'static str;
	331	}
	332
bcfeae48 KS	333	pub fn create_demuxer<'a>(dmxcr: &DemuxerCreator, br: &'a mut ByteReader<'a>) -> DemuxerResult<Demuxer<'a>> {
	334	let mut dmx = dmxcr.new_demuxer(br);
	335	let mut str = StreamManager::new();
33b5a8f0 KS	336	let mut seek_idx = SeekIndex::new();
	337	dmx.open(&mut str, &mut seek_idx)?;
	338	Ok(Demuxer::new(dmx, str, seek_idx))
bcfeae48	339	}
5641dccf	340
e243ceb4	341	#[derive(Default)]
5641dccf KS	342	pub struct RegisteredDemuxers {
	343	dmxs: Vec<&'static DemuxerCreator>,
	344	}
	345
	346	impl RegisteredDemuxers {
	347	pub fn new() -> Self {
	348	Self { dmxs: Vec::new() }
	349	}
	350	pub fn add_demuxer(&mut self, dmx: &'static DemuxerCreator) {
	351	self.dmxs.push(dmx);
	352	}
	353	pub fn find_demuxer(&self, name: &str) -> Option<&DemuxerCreator> {
	354	for &dmx in self.dmxs.iter() {
	355	if dmx.get_name() == name {
	356	return Some(dmx);
	357	}
	358	}
	359	None
	360	}
1a967e6b	361	}