[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 pts:    u64,
    pub pos:    u64,
}

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

impl StreamSeekInfo {
    pub fn new(id: u32, tb_num: u32, tb_den: u32) -> Self {
        Self {
            id, tb_num, tb_den,
            filled:     false,
            entries:    Vec::new(),
        }
    }
    pub fn add_entry(&mut self, entry: SeekEntry) {
        self.entries.push(entry);
    }
    pub fn find_pos(&self, pts: u64) -> Option<u64> {
        if !self.entries.is_empty() {
// todo something faster like binary search
            let mut cand = 0;
            for (idx, entry) in self.entries.iter().enumerate() {
                if entry.pts <= pts {
                    cand = idx;
                } else {
                    break;
                }
            }
            Some(self.entries[cand].pos)
        } 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,
}

impl SeekIndex {
    pub fn new() -> Self { Self::default() }
    pub fn add_stream(&mut self, id: u32, tb_num: u32, tb_den: u32) {
        if self.stream_id_to_index(id).is_none() {
            self.seek_info.push(StreamSeekInfo::new(id, tb_num, tb_den));
        }
    }
    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 find_pos(&self, time: u64) -> Option<SeekIndexResult> {
        let mut cand = None;
        for str in self.seek_info.iter() {
            if !str.filled { continue; }
            let pts = NATimeInfo::time_to_ts(time, 1000, str.tb_num, str.tb_den);
            let pos = str.find_pos(pts);
            if pos.is_none() { continue; }
            let pos = pos.unwrap();
            if cand.is_none() {
                cand = Some(SeekIndexResult { pts, pos, str_id: str.id });
            } else if let Some(entry) = cand {
                if pos < entry.pos {
                    cand = Some(SeekIndexResult { pts, 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<()> {
        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 {
	154	pub pts: u64,
	155	pub pos: u64,
	156	}
	157
	158	#[derive(Clone)]
	159	pub struct StreamSeekInfo {
	160	pub id: u32,
	161	pub tb_num: u32,
	162	pub tb_den: u32,
	163	pub filled: bool,
	164	pub entries: Vec<SeekEntry>,
	165	}
	166
	167	impl StreamSeekInfo {
	168	pub fn new(id: u32, tb_num: u32, tb_den: u32) -> Self {
	169	Self {
	170	id, tb_num, tb_den,
	171	filled: false,
	172	entries: Vec::new(),
	173	}
	174	}
	175	pub fn add_entry(&mut self, entry: SeekEntry) {
	176	self.entries.push(entry);
	177	}
	178	pub fn find_pos(&self, pts: u64) -> Option<u64> {
	179	if !self.entries.is_empty() {
	180	// todo something faster like binary search
	181	let mut cand = 0;
	182	for (idx, entry) in self.entries.iter().enumerate() {
	183	if entry.pts <= pts {
	184	cand = idx;
	185	} else {
	186	break;
	187	}
	188	}
	189	Some(self.entries[cand].pos)
	190	} else {
	191	None
	192	}
	193	}
	194	}
	195
	196	#[derive(Clone,Copy,Default)]
	197	pub struct SeekIndexResult {
	198	pub pts: u64,
	199	pub pos: u64,
	200	pub str_id: u32,
	201	}
	202
	203	#[derive(Default)]
	204	pub struct SeekIndex {
205	pub seek_info: Vec<StreamSeekInfo>,
206	pub mode: SeekIndexMode,
207	}
208
209	impl SeekIndex {
210	pub fn new() -> Self { Self::default() }
211	pub fn add_stream(&mut self, id: u32, tb_num: u32, tb_den: u32) {
212	if self.stream_id_to_index(id).is_none() {
213	self.seek_info.push(StreamSeekInfo::new(id, tb_num, tb_den));
214	}
215	}
216	pub fn stream_id_to_index(&self, id: u32) -> Option<usize> {
217	for (idx, str) in self.seek_info.iter().enumerate() {
218	if str.id == id {
219	return Some(idx);
220	}
221	}
222	None
223	}
224	pub fn find_pos(&self, time: u64) -> Option<SeekIndexResult> {
225	let mut cand = None;
226	for str in self.seek_info.iter() {
227	if !str.filled { continue; }
228	let pts = NATimeInfo::time_to_ts(time, 1000, str.tb_num, str.tb_den);
229	let pos = str.find_pos(pts);
230	if pos.is_none() { continue; }
231	let pos = pos.unwrap();
232	if cand.is_none() {
233	cand = Some(SeekIndexResult { pts, pos, str_id: str.id });
234	} else if let Some(entry) = cand {
235	if pos < entry.pos {
236	cand = Some(SeekIndexResult { pts, pos, str_id: str.id });
237	}
238	}
239	}
240	cand
241	}
242	}
243
bcfeae48	244	pub struct Demuxer<'a> {
6011e201	245	dmx: Box<dyn DemuxCore<'a> + 'a>,
bcfeae48	246	streams: StreamManager,
33b5a8f0	247	seek_idx: SeekIndex,
bcfeae48 KS	248	}
	249
	250	impl<'a> Demuxer<'a> {
33b5a8f0	251	fn new(dmx: Box<dyn DemuxCore<'a> + 'a>, str: StreamManager, seek_idx: SeekIndex) -> Self {
bcfeae48	252	Demuxer {
e243ceb4	253	dmx,
bcfeae48	254	streams: str,
33b5a8f0	255	seek_idx,
bcfeae48 KS	256	}
bcfeae48 KS	257	}
70910ac3	258	pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
bcfeae48 KS	259	self.streams.get_stream(idx)
bcfeae48 KS	260	}
70910ac3	261	pub fn get_stream_by_id(&self, id: u32) -> Option<NAStreamRef> {
bcfeae48 KS	262	self.streams.get_stream_by_id(id)
	263	}
	264	pub fn get_num_streams(&self) -> usize {
	265	self.streams.get_num_streams()
	266	}
	267	pub fn get_streams(&self) -> StreamIter {
	268	self.streams.iter()
	269	}
	270	pub fn is_ignored_stream(&self, idx: usize) -> bool {
	271	self.streams.is_ignored(idx)
	272	}
	273	pub fn set_ignored_stream(&mut self, idx: usize) {
	274	self.streams.set_ignored(idx)
	275	}
	276	pub fn set_unignored_stream(&mut self, idx: usize) {
	277	self.streams.set_unignored(idx)
	278	}
	279
	280	pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
	281	loop {
	282	let res = self.dmx.get_frame(&mut self.streams);
	283	if self.streams.no_ign \|\| res.is_err() { return res; }
	284	let res = res.unwrap();
	285	let idx = res.get_stream().get_num();
	286	if !self.is_ignored_stream(idx) {
	287	return Ok(res);
	288	}
	289	}
	290	}
	291	pub fn seek(&mut self, time: u64) -> DemuxerResult<()> {
33b5a8f0 KS	292	self.dmx.seek(time, &self.seek_idx)
	293	}
	294	pub fn get_seek_index(&self) -> &SeekIndex {
	295	&self.seek_idx
bcfeae48	296	}
5869fd63 KS	297	}
	298
	299	impl From<ByteIOError> for DemuxerError {
	300	fn from(_: ByteIOError) -> Self { DemuxerError::IOError }
	301	}
	302
3f7c7cfd	303	///The structure used to create demuxers.
eb71d98f	304	pub trait DemuxerCreator {
3f7c7cfd	305	/// Create new demuxer instance that will use `ByteReader` source as an input.
6011e201	306	fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a>;
3f7c7cfd	307	/// Get the name of current demuxer creator.
eb71d98f KS	308	fn get_name(&self) -> &'static str;
	309	}
	310
bcfeae48 KS	311	pub fn create_demuxer<'a>(dmxcr: &DemuxerCreator, br: &'a mut ByteReader<'a>) -> DemuxerResult<Demuxer<'a>> {
	312	let mut dmx = dmxcr.new_demuxer(br);
	313	let mut str = StreamManager::new();
33b5a8f0 KS	314	let mut seek_idx = SeekIndex::new();
	315	dmx.open(&mut str, &mut seek_idx)?;
	316	Ok(Demuxer::new(dmx, str, seek_idx))
bcfeae48	317	}
5641dccf	318
e243ceb4	319	#[derive(Default)]
5641dccf KS	320	pub struct RegisteredDemuxers {
	321	dmxs: Vec<&'static DemuxerCreator>,
	322	}
	323
	324	impl RegisteredDemuxers {
	325	pub fn new() -> Self {
	326	Self { dmxs: Vec::new() }
	327	}
	328	pub fn add_demuxer(&mut self, dmx: &'static DemuxerCreator) {
	329	self.dmxs.push(dmx);
	330	}
	331	pub fn find_demuxer(&self, name: &str) -> Option<&DemuxerCreator> {
	332	for &dmx in self.dmxs.iter() {
	333	if dmx.get_name() == name {
	334	return Some(dmx);
	335	}
	336	}
	337	None
	338	}
1a967e6b	339	}