src/demux.rs

   1 use std::io::SeekFrom;
   2 use nihav_core::codecs::*;
   3 use nihav_core::demuxers::*;
   4 use nihav_core::muxers::*;
   5 use nihav_registry::detect;
   6 use nihav_core::io::byteio::ByteReader;
   7 use nihav_allstuff::*;
   8 use crate::null::*;
   9
  10 pub struct FullRegister {
  11     pub dmx_reg:    RegisteredDemuxers,
  12     pub rdmx_reg:   RegisteredRawDemuxers,
  13     pub pkt_reg:    RegisteredPacketisers,
  14     pub dec_reg:    RegisteredDecoders,
  15     pub enc_reg:    RegisteredEncoders,
  16     pub mux_reg:    RegisteredMuxers,
  17 }
  18
  19 impl FullRegister {
  20     pub fn new() -> Self {
  21         let mut dmx_reg = RegisteredDemuxers::new();
  22         nihav_register_all_demuxers(&mut dmx_reg);
  23         let mut rdmx_reg = RegisteredRawDemuxers::new();
  24         nihav_register_all_raw_demuxers(&mut rdmx_reg);
  25         let mut dec_reg = RegisteredDecoders::new();
  26         nihav_register_all_decoders(&mut dec_reg);
  27         let mut pkt_reg = RegisteredPacketisers::new();
  28         nihav_register_all_packetisers(&mut pkt_reg);
  29         let mut enc_reg = RegisteredEncoders::new();
  30         nihav_register_all_encoders(&mut enc_reg);
  31         enc_reg.add_encoder(NULL_ENCODER);
  32         let mut mux_reg = RegisteredMuxers::new();
  33         nihav_register_all_muxers(&mut mux_reg);
  34         mux_reg.add_muxer(NULL_MUXER);
  35         Self { dmx_reg, rdmx_reg, pkt_reg, dec_reg, enc_reg, mux_reg }
  36     }
  37 }
  38
  39 pub struct RawStreamCtx<'a> {
  40     stream:     NAStreamRef,
  41     sm:         StreamManager,
  42     packetiser: Box<dyn NAPacketiser + Send>,
  43     br:         &'a mut ByteReader<'a>,
  44     pts:        u64,
  45 }
  46
  47 impl<'a> RawStreamCtx<'a> {
  48     fn new(stream: NAStreamRef, packetiser: Box<dyn NAPacketiser + Send>, br: &'a mut ByteReader<'a>) -> Self {
  49         let mut sm = StreamManager::new();
  50         sm.add_stream_ref(stream.clone());
  51         Self { stream, sm, packetiser, br, pts: 0 }
  52     }
  53 }
  54
  55 pub enum DemuxerObject<'a> {
  56     None,
  57     Normal(Demuxer<'a>),
  58     Raw(RawDemuxer<'a>, Vec<Option<Box<dyn NAPacketiser + Send>>>, bool),
  59     RawStream(RawStreamCtx<'a>),
  60 }
  61
  62 impl<'a> DemuxerObject<'a> {
  63     pub fn create(br: &'a mut ByteReader<'a>, reg: &FullRegister, name: &str, ifmt: &Option<String>, is_raw: bool) -> DemuxerObject<'a> {
  64         if !is_raw {
  65             let dmx_name = if let Some(ref dname) = ifmt {
  66                     dname.as_str()
  67                 } else if let Some((dname, score)) = detect::detect_format(name, br) {
  68                     println!("detected {} with score {:?}", dname, score);
  69                     dname
  70                 } else {
  71                     ""
  72                 };
  73             if dmx_name != "" {
  74                 println!("trying demuxer {} on {}", dmx_name, name);
  75                 if let Some(dmx_fact) = reg.dmx_reg.find_demuxer(dmx_name) {
  76                     br.seek(SeekFrom::Start(0)).unwrap();
  77                     let dmx = create_demuxer(dmx_fact, br).unwrap();
  78                     return DemuxerObject::Normal(dmx);
  79                 }
  80             }
  81             if ifmt.is_some() {
  82                 return DemuxerObject::None;
  83             }
  84             if dmx_name != "" {
  85                 println!("trying raw demuxer {} on {}", dmx_name, name);
  86                 if let Some(rdmx_fact) = reg.rdmx_reg.find_demuxer(dmx_name) {
  87                     br.seek(SeekFrom::Start(0)).unwrap();
  88                     let dmx = create_raw_demuxer(rdmx_fact, br).unwrap();
  89                     let mut pkts = Vec::new();
  90                     for stream in dmx.get_streams() {
  91                         if let Some(pcreate) = reg.pkt_reg.find_packetiser(stream.get_info().get_name()) {
  92                             let packetiser = (pcreate)();
  93                             pkts.push(Some(packetiser));
  94                         } else {
  95                             pkts.push(None);
  96                         }
  97                     }
  98                     return DemuxerObject::Raw(dmx, pkts, false);
  99                 }
 100             }
 101             for rdmx in reg.rdmx_reg.iter() {
 102                 if rdmx.check_format(br) {
 103                     println!("detected {} as {}", name, rdmx.get_name());
 104                     br.seek(SeekFrom::Start(0)).unwrap();
 105                     let dmx = create_raw_demuxer(*rdmx, br).unwrap();
 106                     let mut pkts = Vec::new();
 107                     for stream in dmx.get_streams() {
 108                         if let Some(pcreate) = reg.pkt_reg.find_packetiser(stream.get_info().get_name()) {
 109                             let packetiser = (pcreate)();
 110                             pkts.push(Some(packetiser));
 111                         } else {
 112                             pkts.push(None);
 113                         }
 114                     }
 115                     return DemuxerObject::Raw(dmx, pkts, false);
 116                 }
 117             }
 118         }
 119         br.seek(SeekFrom::Start(0)).unwrap();
 120         let mut buf = vec![0; 1048576];
 121         let size = br.peek_buf(&mut buf).unwrap();
 122         let mut pname = "";
 123
 124         for pinfo in reg.pkt_reg.iter() {
 125             let mut packetiser = (pinfo.get_packetiser)();
 126             packetiser.add_data(&buf[..size]);
 127             if packetiser.parse_stream(0).is_ok() {
 128                 pname = pinfo.name;
 129                 break;
 130             }
 131         }
 132         if pname != "" {
 133             println!("found raw stream of type {} for {}", pname, name);
 134             let pcreate = reg.pkt_reg.find_packetiser(pname).unwrap();
 135             let mut packetiser = (pcreate)();
 136             packetiser.add_data(&buf[..size]);
 137             let stream = packetiser.parse_stream(0).unwrap();
 138             packetiser.reset();
 139             DemuxerObject::RawStream(RawStreamCtx::new(stream, packetiser, br))
 140         } else {
 141             DemuxerObject::None
 142         }
 143     }
 144     pub fn is_none(&self) -> bool {
 145         match *self {
 146             DemuxerObject::None => true,
 147             _ => false,
 148         }
 149     }
 150     pub fn get_duration(&self) -> u64 {
 151         match *self {
 152             DemuxerObject::Normal(ref dmx) => dmx.get_duration(),
 153             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_duration(),
 154             _ => 0,
 155         }
 156     }
 157     pub fn get_num_streams(&self) -> usize {
 158         match *self {
 159             DemuxerObject::None => 0,
 160             DemuxerObject::Normal(ref dmx) => dmx.get_num_streams(),
 161             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_num_streams(),
 162             DemuxerObject::RawStream(_) => 1,
 163         }
 164     }
 165     pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
 166         match *self {
 167             DemuxerObject::Normal(ref dmx) => dmx.get_stream(idx),
 168             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_stream(idx),
 169             DemuxerObject::RawStream(ref ctx) if idx == 0 => Some(ctx.stream.clone()),
 170             _ => None,
 171         }
 172     }
 173     pub fn get_streams(&self) -> StreamIter {
 174         match *self {
 175             DemuxerObject::Normal(ref dmx) => dmx.get_streams(),
 176             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_streams(),
 177             DemuxerObject::RawStream(ref ctx) => ctx.sm.iter(),
 178             _ => unreachable!(),
 179         }
 180     }
 181     pub fn get_stream_manager(&self) -> &StreamManager {
 182         match *self {
 183             DemuxerObject::Normal(ref dmx) => dmx.get_stream_manager(),
 184             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_stream_manager(),
 185             DemuxerObject::RawStream(ref ctx) => &ctx.sm,
 186             _ => unreachable!(),
 187         }
 188     }
 189     pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
 190         match *self {
 191             DemuxerObject::Normal(ref mut dmx) => dmx.get_frame(),
 192             DemuxerObject::Raw(ref mut dmx, ref mut packetisers, ref mut eof) => {
 193                 loop {
 194                     let mut has_some = false;
 195                     for (stream, p) in dmx.get_streams().zip(packetisers.iter_mut()) {
 196                         if let Some(ref mut pkts) = p {
 197                             match pkts.get_packet(stream.clone()) {
 198                                 Ok(Some(pkt)) => return Ok(pkt),
 199                                 Ok(None) | Err(DecoderError::ShortData) => {
 200                                     if *eof {
 201                                         *p = None;
 202                                     }
 203                                 },
 204                                 Err(err) => {
 205                                     println!("packetisation error {:?}", err);
 206                                     return Err(DemuxerError::InvalidData);
 207                                 }
 208                             };
 209                             has_some |= p.is_some();
 210                         }
 211                     }
 212                     if !has_some {
 213                         return Err(DemuxerError::EOF);
 214                     }
 215                     if let Ok(data) = dmx.get_data() {
 216                         let id = data.get_stream().get_id();
 217                         for (i, stream) in dmx.get_streams().enumerate() {
 218                             if stream.get_id() == id {
 219                                 if let Some(ref mut pkts) = packetisers[i] {
 220                                     pkts.add_data(&data.get_buffer());
 221                                 }
 222                                 break;
 223                             }
 224                         }
 225                     } else {
 226                         *eof = true;
 227                     }
 228                 }
 229             },
 230             DemuxerObject::RawStream(ref mut ctx) => {
 231                 let mut buf = [0; 65536];
 232                 loop {
 233                     match ctx.packetiser.get_packet(ctx.stream.clone()) {
 234                         Ok(Some(mut packet)) => {
 235                             if packet.get_pts().is_none() && packet.get_duration().is_some() {
 236                                 packet.ts.pts = Some(ctx.pts);
 237                             }
 238                             ctx.pts += packet.get_duration().unwrap_or(0);
 239                             return Ok(packet);
 240                         },
 241                         Ok(None) => {},
 242                         Err(DecoderError::ShortData) => {},
 243                         _ => return Err(DemuxerError::InvalidData),
 244                     };
 245                     match ctx.br.read_buf_some(&mut buf) {
 246                         Ok(size) => {
 247                             ctx.packetiser.add_data(&buf[..size]);
 248                         },
 249                         Err(_) => {
 250                             match ctx.packetiser.get_packet(ctx.stream.clone()) {
 251                                 Ok(Some(mut packet)) => {
 252                                     if packet.get_pts().is_none() && packet.get_duration().is_some() {
 253                                         packet.ts.pts = Some(ctx.pts);
 254                                     }
 255                                     ctx.pts += packet.get_duration().unwrap_or(0);
 256                                     return Ok(packet);
 257                                 },
 258                                 Ok(None) | Err(DecoderError::ShortData) => return Err(DemuxerError::EOF),
 259                                 _ => return Err(DemuxerError::InvalidData),
 260                             };
 261                         },
 262                     };
 263                 }
 264             },
 265             _ => unreachable!(),
 266         }
 267     }
 268     pub fn seek(&mut self, seek_time: NATimePoint) -> DemuxerResult<()> {
 269         match *self {
 270             DemuxerObject::Normal(ref mut dmx) => dmx.seek(seek_time),
 271             DemuxerObject::Raw(ref mut dmx, _, _) => dmx.seek(seek_time),
 272             _ => Err(DemuxerError::NotImplemented),
 273         }
 274     }
 275 }
 276
 277 impl<'a> NAOptionHandler for DemuxerObject<'a> {
 278     fn get_supported_options(&self) -> &[NAOptionDefinition] {
 279         match *self {
 280             DemuxerObject::Normal(ref dmx) => dmx.get_supported_options(),
 281             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_supported_options(),
 282             _ => &[],
 283         }
 284     }
 285     fn set_options(&mut self, options: &[NAOption]) {
 286         match *self {
 287             DemuxerObject::Normal(ref mut dmx) => dmx.set_options(options),
 288             DemuxerObject::Raw(ref mut dmx, _, _) => dmx.set_options(options),
 289             _ => {},
 290         }
 291     }
 292     fn query_option_value(&self, name: &str) -> Option<NAValue> {
 293         match *self {
 294             DemuxerObject::Normal(ref dmx) => dmx.query_option_value(name),
 295             DemuxerObject::Raw(ref dmx, _, _) => dmx.query_option_value(name),
 296             _ => None,
 297         }
 298     }
 299 }
 300
 301 pub fn detect_tags(br: &mut ByteReader) -> (bool, u64, Option<u64>) {
 302     let mut is_raw = false;
 303     let mut start = 0;
 304     let mut end = None;
 305
 306     // check for ID3v{2-4}
 307     let mut buf = [0; 5];
 308     br.peek_buf(&mut buf).unwrap();
 309     if &buf[0..3] == b"ID3" && buf[3] > 0 && buf[3] < 5 && buf[4] == 0 { //ID3 tag found, must be a raw stream
 310         br.read_skip(6).unwrap();
 311         let mut size = 0;
 312         for _ in 0..4 {
 313             let b = br.read_byte().unwrap();
 314             if (b & 0x80) != 0 {
 315                 println!("Invalid ID3 size");
 316                 break;
 317             }
 318             size = (size << 7) | u64::from(b);
 319         }
 320         start = size + 10;
 321         is_raw = true;
 322     }
 323     // check for ID3v1
 324     br.seek(SeekFrom::End(-128)).unwrap();
 325     let off = br.tell();
 326     br.peek_buf(&mut buf[..3]).unwrap();
 327     if &buf[0..3] == b"TAG" {
 328         end = Some(off);
 329     }
 330     // check for APETAG
 331     let mut buf = [0; 8];
 332     if let Some(off) = end {
 333         br.seek(SeekFrom::Start(off - 32)).unwrap();
 334     } else {
 335         br.seek(SeekFrom::End(-32)).unwrap();
 336     }
 337     let off = br.tell();
 338     br.read_buf(&mut buf).unwrap();
 339     if &buf == b"APETAGEX" {
 340         let ver     = br.read_u32le().unwrap();
 341         let size    = u64::from(br.read_u32le().unwrap());
 342         let _items  = br.read_u32le().unwrap();
 343         let flags   = br.read_u32le().unwrap();
 344         if ver == 1000 || (flags & 0x80000000) == 0 {
 345             end = Some(off - size + 32);
 346         } else {
 347             end = Some(off - size);
 348         }
 349     }
 350
 351     (is_raw, start, end)
 352 }