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use std::io::SeekFrom;
use nihav_core::codecs::*;
use nihav_core::demuxers::*;
use nihav_registry::detect;
use nihav_core::io::byteio::ByteReader;
use super::allreg::FullRegister;
pub enum DemuxerObject<'a> {
None,
Normal(Demuxer<'a>),
Raw(RawDemuxer<'a>, Vec<Option<Box<dyn NAPacketiser + Send>>>, bool),
RawStream(Box<dyn NAPacketiser + Send>, NAStreamRef, &'a mut ByteReader<'a>),
}
impl<'a> DemuxerObject<'a> {
pub fn create(br: &'a mut ByteReader<'a>, reg: &FullRegister, name: &str, is_raw: bool) -> DemuxerObject<'a> {
if !is_raw {
let res = detect::detect_format(name, br);
let (dmx_name, _) = res.unwrap_or(("", detect::DetectionScore::No));
if dmx_name != "" {
println!("trying demuxer {} on {}", dmx_name, name);
if let Some(dmx_fact) = reg.dmx_reg.find_demuxer(dmx_name) {
br.seek(SeekFrom::Start(0)).unwrap();
let dmx = create_demuxer(dmx_fact, br).unwrap();
return DemuxerObject::Normal(dmx);
}
}
if dmx_name != "" {
println!("trying raw demuxer {} on {}", dmx_name, name);
if let Some(rdmx_fact) = reg.rdmx_reg.find_demuxer(dmx_name) {
br.seek(SeekFrom::Start(0)).unwrap();
let dmx = create_raw_demuxer(rdmx_fact, br).unwrap();
let mut pkts = Vec::new();
for stream in dmx.get_streams() {
if let Some(pcreate) = reg.pkt_reg.find_packetiser(stream.get_info().get_name()) {
let packetiser = (pcreate)();
pkts.push(Some(packetiser));
} else {
pkts.push(None);
}
}
return DemuxerObject::Raw(dmx, pkts, false);
}
}
for rdmx in reg.rdmx_reg.iter() {
if rdmx.check_format(br) {
println!("detected {} as {}", name, rdmx.get_name());
br.seek(SeekFrom::Start(0)).unwrap();
let dmx = create_raw_demuxer(*rdmx, br).unwrap();
let mut pkts = Vec::new();
for stream in dmx.get_streams() {
if let Some(pcreate) = reg.pkt_reg.find_packetiser(stream.get_info().get_name()) {
let packetiser = (pcreate)();
pkts.push(Some(packetiser));
} else {
pkts.push(None);
}
}
return DemuxerObject::Raw(dmx, pkts, false);
}
}
}
br.seek(SeekFrom::Start(0)).unwrap();
let mut buf = vec![0; 1048576];
let size = br.peek_buf(&mut buf).unwrap();
let mut pname = "";
for pinfo in reg.pkt_reg.iter() {
let mut packetiser = (pinfo.get_packetiser)();
packetiser.add_data(&buf[..size]);
if packetiser.parse_stream(0).is_ok() {
pname = pinfo.name;
break;
}
}
if pname != "" {
println!("found raw stream of type {} for {}", pname, name);
let pcreate = reg.pkt_reg.find_packetiser(pname).unwrap();
let mut packetiser = (pcreate)();
packetiser.add_data(&buf[..size]);
let stream = packetiser.parse_stream(0).unwrap();
packetiser.reset();
DemuxerObject::RawStream(packetiser, stream, br)
} else {
DemuxerObject::None
}
}
pub fn is_none(&self) -> bool {
match *self {
DemuxerObject::None => true,
_ => false,
}
}
pub fn get_duration(&self) -> u64 {
match *self {
DemuxerObject::Normal(ref dmx) => dmx.get_duration(),
DemuxerObject::Raw(ref dmx, _, _) => dmx.get_duration(),
_ => 0,
}
}
pub fn get_num_streams(&self) -> usize {
match *self {
DemuxerObject::None => 0,
DemuxerObject::Normal(ref dmx) => dmx.get_num_streams(),
DemuxerObject::Raw(ref dmx, _, _) => dmx.get_num_streams(),
DemuxerObject::RawStream(_, _, _) => 1,
}
}
pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
match *self {
DemuxerObject::Normal(ref dmx) => dmx.get_stream(idx),
DemuxerObject::Raw(ref dmx, _, _) => dmx.get_stream(idx),
DemuxerObject::RawStream(_, ref stream, _) if idx == 0 => Some(stream.clone()),
_ => None,
}
}
pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
match *self {
DemuxerObject::Normal(ref mut dmx) => dmx.get_frame(),
DemuxerObject::Raw(ref mut dmx, ref mut packetisers, ref mut eof) => {
loop {
let mut has_some = false;
for (stream, p) in dmx.get_streams().zip(packetisers.iter_mut()) {
if let Some(ref mut pkts) = p {
match pkts.get_packet(stream.clone()) {
Ok(Some(pkt)) => return Ok(pkt),
Ok(None) | Err(DecoderError::ShortData) => {
if *eof {
*p = None;
}
},
Err(err) => {
println!("packetisation error {:?}", err);
return Err(DemuxerError::InvalidData);
}
};
has_some |= p.is_some();
}
}
if !has_some {
return Err(DemuxerError::EOF);
}
if let Ok(data) = dmx.get_data() {
let id = data.get_stream().get_id();
for (i, stream) in dmx.get_streams().enumerate() {
if stream.get_id() == id {
if let Some(ref mut pkts) = packetisers[i] {
pkts.add_data(&data.get_buffer());
}
break;
}
}
} else {
*eof = true;
}
}
},
DemuxerObject::RawStream(ref mut pkt, ref stream, ref mut br) => {
let mut buf = [0; 1048576];
loop {
match pkt.get_packet(stream.clone()) {
Ok(Some(packet)) => return Ok(packet),
Ok(None) => {},
Err(DecoderError::ShortData) => {},
_ => return Err(DemuxerError::InvalidData),
};
match br.read_buf_some(&mut buf) {
Ok(size) => {
pkt.add_data(&buf[..size]);
},
Err(_) => {
match pkt.get_packet(stream.clone()) {
Ok(Some(packet)) => return Ok(packet),
Ok(None) | Err(DecoderError::ShortData) => return Err(DemuxerError::EOF),
_ => return Err(DemuxerError::InvalidData),
};
},
};
}
},
_ => unreachable!(),
}
}
pub fn seek(&mut self, seek_time: NATimePoint) -> DemuxerResult<()> {
match *self {
DemuxerObject::Normal(ref mut dmx) => dmx.seek(seek_time),
DemuxerObject::Raw(ref mut dmx, _, _) => dmx.seek(seek_time),
_ => Err(DemuxerError::NotImplemented),
}
}
}
pub fn detect_tags(br: &mut ByteReader) -> (bool, u64, Option<u64>) {
let mut is_raw = false;
let mut start = 0;
let mut end = None;
// check for ID3v{2-4}
let mut buf = [0; 5];
br.peek_buf(&mut buf).unwrap();
if &buf[0..3] == b"ID3" && buf[3] > 0 && buf[3] < 5 && buf[4] == 0 { //ID3 tag found, must be a raw stream
br.read_skip(6).unwrap();
let mut size = 0;
for _ in 0..4 {
let b = br.read_byte().unwrap();
if (b & 0x80) != 0 {
println!("Invalid ID3 size");
break;
}
size = (size << 7) | u64::from(b);
}
start = size + 10;
is_raw = true;
}
// check for ID3v1
br.seek(SeekFrom::End(-128)).unwrap();
let off = br.tell();
br.peek_buf(&mut buf[..3]).unwrap();
if &buf[0..3] == b"TAG" {
end = Some(off);
}
// check for APETAG
let mut buf = [0; 8];
if let Some(off) = end {
br.seek(SeekFrom::Start(off - 32)).unwrap();
} else {
br.seek(SeekFrom::End(-32)).unwrap();
}
let off = br.tell();
br.read_buf(&mut buf).unwrap();
if &buf == b"APETAGEX" {
let ver = br.read_u32le().unwrap();
let size = u64::from(br.read_u32le().unwrap());
let _items = br.read_u32le().unwrap();
let flags = br.read_u32le().unwrap();
if ver == 1000 || (flags & 0x80000000) == 0 {
end = Some(off - size + 32);
} else {
end = Some(off - size);
}
}
(is_raw, start, end)
}
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