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