src/demux.rs

   1 use std::io::SeekFrom;
   2 use nihav_core::codecs::*;
   3 use nihav_core::demuxers::*;
   4 use nihav_registry::detect;
   5 use nihav_core::io::byteio::ByteReader;
   6 use nihav_allstuff::*;
   7
   8 pub struct FullRegister {
   9     pub dmx_reg:    RegisteredDemuxers,
  10     pub rdmx_reg:   RegisteredRawDemuxers,
  11     pub pkt_reg:    RegisteredPacketisers,
  12     pub dec_reg:    RegisteredDecoders,
  13 }
  14
  15 impl FullRegister {
  16     pub fn new() -> Self {
  17         let mut dmx_reg = RegisteredDemuxers::new();
  18         nihav_register_all_demuxers(&mut dmx_reg);
  19         let mut rdmx_reg = RegisteredRawDemuxers::new();
  20         nihav_register_all_raw_demuxers(&mut rdmx_reg);
  21         let mut dec_reg = RegisteredDecoders::new();
  22         nihav_register_all_decoders(&mut dec_reg);
  23         let mut pkt_reg = RegisteredPacketisers::new();
  24         nihav_register_all_packetisers(&mut pkt_reg);
  25         Self { dmx_reg, rdmx_reg, pkt_reg, dec_reg }
  26     }
  27 }
  28
  29 pub enum DemuxerObject<'a> {
  30     None,
  31     Normal(Demuxer<'a>),
  32     Raw(RawDemuxer<'a>, Vec<Option<Box<dyn NAPacketiser + Send>>>, bool),
  33     RawStream(Box<dyn NAPacketiser + Send>, NAStreamRef, &'a mut ByteReader<'a>),
  34 }
  35
  36 impl<'a> DemuxerObject<'a> {
  37     pub fn create(br: &'a mut ByteReader<'a>, reg: &FullRegister, name: &str, is_raw: bool) -> DemuxerObject<'a> {
  38         if !is_raw {
  39             let res = detect::detect_format(name, br);
  40             let (dmx_name, _) = res.unwrap_or(("", detect::DetectionScore::No));
  41             if dmx_name != "" {
  42                 println!("trying demuxer {} on {}", dmx_name, name);
  43                 if let Some(dmx_fact) = reg.dmx_reg.find_demuxer(dmx_name) {
  44                     br.seek(SeekFrom::Start(0)).unwrap();
  45                     let dmx = create_demuxer(dmx_fact, br).unwrap();
  46                     return DemuxerObject::Normal(dmx);
  47                 }
  48             }
  49             if dmx_name != "" {
  50                 println!("trying raw demuxer {} on {}", dmx_name, name);
  51                 if let Some(rdmx_fact) = reg.rdmx_reg.find_demuxer(dmx_name) {
  52                     br.seek(SeekFrom::Start(0)).unwrap();
  53                     let dmx = create_raw_demuxer(rdmx_fact, br).unwrap();
  54                     let mut pkts = Vec::new();
  55                     for stream in dmx.get_streams() {
  56                         if let Some(pcreate) = reg.pkt_reg.find_packetiser(stream.get_info().get_name()) {
  57                             let packetiser = (pcreate)();
  58                             pkts.push(Some(packetiser));
  59                         } else {
  60                             pkts.push(None);
  61                         }
  62                     }
  63                     return DemuxerObject::Raw(dmx, pkts, false);
  64                 }
  65             }
  66             for rdmx in reg.rdmx_reg.iter() {
  67                 if rdmx.check_format(br) {
  68                     println!("detected {} as {}", name, rdmx.get_name());
  69                     br.seek(SeekFrom::Start(0)).unwrap();
  70                     let dmx = create_raw_demuxer(*rdmx, br).unwrap();
  71                     let mut pkts = Vec::new();
  72                     for stream in dmx.get_streams() {
  73                         if let Some(pcreate) = reg.pkt_reg.find_packetiser(stream.get_info().get_name()) {
  74                             let packetiser = (pcreate)();
  75                             pkts.push(Some(packetiser));
  76                         } else {
  77                             pkts.push(None);
  78                         }
  79                     }
  80                     return DemuxerObject::Raw(dmx, pkts, false);
  81                 }
  82             }
  83         }
  84         br.seek(SeekFrom::Start(0)).unwrap();
  85         let mut buf = vec![0; 1048576];
  86         let size = br.peek_buf(&mut buf).unwrap();
  87         let mut pname = "";
  88
  89         for pinfo in reg.pkt_reg.iter() {
  90             let mut packetiser = (pinfo.get_packetiser)();
  91             packetiser.add_data(&buf[..size]);
  92             if packetiser.parse_stream(0).is_ok() {
  93                 pname = pinfo.name;
  94                 break;
  95             }
  96         }
  97         if pname != "" {
  98             println!("found raw stream of type {} for {}", pname, name);
  99             let pcreate = reg.pkt_reg.find_packetiser(pname).unwrap();
 100             let mut packetiser = (pcreate)();
 101             packetiser.add_data(&buf[..size]);
 102             let stream = packetiser.parse_stream(0).unwrap();
 103             packetiser.reset();
 104             DemuxerObject::RawStream(packetiser, stream, br)
 105         } else {
 106             DemuxerObject::None
 107         }
 108     }
 109     pub fn is_none(&self) -> bool {
 110         match *self {
 111             DemuxerObject::None => true,
 112             _ => false,
 113         }
 114     }
 115     pub fn get_duration(&self) -> u64 {
 116         match *self {
 117             DemuxerObject::Normal(ref dmx) => dmx.get_duration(),
 118             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_duration(),
 119             _ => 0,
 120         }
 121     }
 122     pub fn get_num_streams(&self) -> usize {
 123         match *self {
 124             DemuxerObject::None => 0,
 125             DemuxerObject::Normal(ref dmx) => dmx.get_num_streams(),
 126             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_num_streams(),
 127             DemuxerObject::RawStream(_, _, _) => 1,
 128         }
 129     }
 130     pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
 131         match *self {
 132             DemuxerObject::Normal(ref dmx) => dmx.get_stream(idx),
 133             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_stream(idx),
 134             DemuxerObject::RawStream(_, ref stream, _) if idx == 0 => Some(stream.clone()),
 135             _ => None,
 136         }
 137     }
 138     pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
 139         match *self {
 140             DemuxerObject::Normal(ref mut dmx) => dmx.get_frame(),
 141             DemuxerObject::Raw(ref mut dmx, ref mut packetisers, ref mut eof) => {
 142                 loop {
 143                     let mut has_some = false;
 144                     for (stream, p) in dmx.get_streams().zip(packetisers.iter_mut()) {
 145                         if let Some(ref mut pkts) = p {
 146                             match pkts.get_packet(stream.clone()) {
 147                                 Ok(Some(pkt)) => return Ok(pkt),
 148                                 Ok(None) | Err(DecoderError::ShortData) => {
 149                                     if *eof {
 150                                         *p = None;
 151                                     }
 152                                 },
 153                                 Err(err) => {
 154                                     println!("packetisation error {:?}", err);
 155                                     return Err(DemuxerError::InvalidData);
 156                                 }
 157                             };
 158                             has_some |= p.is_some();
 159                         }
 160                     }
 161                     if !has_some {
 162                         return Err(DemuxerError::EOF);
 163                     }
 164                     if let Ok(data) = dmx.get_data() {
 165                         let id = data.get_stream().get_id();
 166                         for (i, stream) in dmx.get_streams().enumerate() {
 167                             if stream.get_id() == id {
 168                                 if let Some(ref mut pkts) = packetisers[i] {
 169                                     pkts.add_data(&data.get_buffer());
 170                                 }
 171                                 break;
 172                             }
 173                         }
 174                     } else {
 175                         *eof = true;
 176                     }
 177                 }
 178             },
 179             DemuxerObject::RawStream(ref mut pkt, ref stream, ref mut br) => {
 180                 let mut buf = [0; 1048576];
 181                 loop {
 182                     match pkt.get_packet(stream.clone()) {
 183                         Ok(Some(packet)) => return Ok(packet),
 184                         Ok(None) => {},
 185                         Err(DecoderError::ShortData) => {},
 186                         _ => return Err(DemuxerError::InvalidData),
 187                     };
 188                     match br.read_buf_some(&mut buf) {
 189                         Ok(size) => {
 190                             pkt.add_data(&buf[..size]);
 191                         },
 192                         Err(_) => {
 193                             match pkt.get_packet(stream.clone()) {
 194                                 Ok(Some(packet)) => return Ok(packet),
 195                                 Ok(None) | Err(DecoderError::ShortData) => return Err(DemuxerError::EOF),
 196                                 _ => return Err(DemuxerError::InvalidData),
 197                             };
 198                         },
 199                     };
 200                 }
 201             },
 202             _ => unreachable!(),
 203         }
 204     }
 205     pub fn seek(&mut self, seek_time: NATimePoint) -> DemuxerResult<()> {
 206         match *self {
 207             DemuxerObject::Normal(ref mut dmx) => dmx.seek(seek_time),
 208             DemuxerObject::Raw(ref mut dmx, _, _) => dmx.seek(seek_time),
 209             _ => Err(DemuxerError::NotImplemented),
 210         }
 211     }
 212 }
 213
 214 pub fn detect_tags(br: &mut ByteReader) -> (bool, u64, Option<u64>) {
 215     let mut is_raw = false;
 216     let mut start = 0;
 217     let mut end = None;
 218
 219     // check for ID3v{2-4}
 220     let mut buf = [0; 5];
 221     br.peek_buf(&mut buf).unwrap();
 222     if &buf[0..3] == b"ID3" && buf[3] > 0 && buf[3] < 5 && buf[4] == 0 { //ID3 tag found, must be a raw stream
 223         br.read_skip(6).unwrap();
 224         let mut size = 0;
 225         for _ in 0..4 {
 226             let b = br.read_byte().unwrap();
 227             if (b & 0x80) != 0 {
 228                 println!("Invalid ID3 size");
 229                 break;
 230             }
 231             size = (size << 7) | u64::from(b);
 232         }
 233         start = size + 10;
 234         is_raw = true;
 235     }
 236     // check for ID3v1
 237     br.seek(SeekFrom::End(-128)).unwrap();
 238     let off = br.tell();
 239     br.peek_buf(&mut buf[..3]).unwrap();
 240     if &buf[0..3] == b"TAG" {
 241         end = Some(off);
 242     }
 243     // check for APETAG
 244     let mut buf = [0; 8];
 245     if let Some(off) = end {
 246         br.seek(SeekFrom::Start(off - 32)).unwrap();
 247     } else {
 248         br.seek(SeekFrom::End(-32)).unwrap();
 249     }
 250     let off = br.tell();
 251     br.read_buf(&mut buf).unwrap();
 252     if &buf == b"APETAGEX" {
 253         let ver     = br.read_u32le().unwrap();
 254         let size    = u64::from(br.read_u32le().unwrap());
 255         let _items  = br.read_u32le().unwrap();
 256         let flags   = br.read_u32le().unwrap();
 257         if ver == 1000 || (flags & 0x80000000) == 0 {
 258             end = Some(off - size + 32);
 259         } else {
 260             end = Some(off - size);
 261         }
 262     }
 263
 264     (is_raw, start, end)
 265 }