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             DemuxerObject::RawStream(ref ctx) => {
 155                 NATimeInfo::ts_to_time(ctx.stream.duration, 1000, ctx.stream.tb_num, ctx.stream.tb_den)
 156             },
 157             _ => 0,
 158         }
 159     }
 160     pub fn get_num_streams(&self) -> usize {
 161         match *self {
 162             DemuxerObject::None => 0,
 163             DemuxerObject::Normal(ref dmx) => dmx.get_num_streams(),
 164             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_num_streams(),
 165             DemuxerObject::RawStream(_) => 1,
 166         }
 167     }
 168     pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> {
 169         match *self {
 170             DemuxerObject::Normal(ref dmx) => dmx.get_stream(idx),
 171             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_stream(idx),
 172             DemuxerObject::RawStream(ref ctx) if idx == 0 => Some(ctx.stream.clone()),
 173             _ => None,
 174         }
 175     }
 176     pub fn get_streams(&self) -> StreamIter {
 177         match *self {
 178             DemuxerObject::Normal(ref dmx) => dmx.get_streams(),
 179             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_streams(),
 180             DemuxerObject::RawStream(ref ctx) => ctx.sm.iter(),
 181             _ => unreachable!(),
 182         }
 183     }
 184     pub fn get_stream_manager(&self) -> &StreamManager {
 185         match *self {
 186             DemuxerObject::Normal(ref dmx) => dmx.get_stream_manager(),
 187             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_stream_manager(),
 188             DemuxerObject::RawStream(ref ctx) => &ctx.sm,
 189             _ => unreachable!(),
 190         }
 191     }
 192     pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
 193         match *self {
 194             DemuxerObject::Normal(ref mut dmx) => dmx.get_frame(),
 195             DemuxerObject::Raw(ref mut dmx, ref mut packetisers, ref mut eof) => {
 196                 loop {
 197                     let mut has_some = false;
 198                     for (stream, p) in dmx.get_streams().zip(packetisers.iter_mut()) {
 199                         if let Some(ref mut pkts) = p {
 200                             match pkts.get_packet(stream.clone()) {
 201                                 Ok(Some(pkt)) => return Ok(pkt),
 202                                 Ok(None) | Err(DecoderError::ShortData) => {
 203                                     if *eof {
 204                                         *p = None;
 205                                     }
 206                                 },
 207                                 Err(err) => {
 208                                     println!("packetisation error {:?}", err);
 209                                     return Err(DemuxerError::InvalidData);
 210                                 }
 211                             };
 212                             has_some |= p.is_some();
 213                         }
 214                     }
 215                     if !has_some {
 216                         return Err(DemuxerError::EOF);
 217                     }
 218                     if let Ok(data) = dmx.get_data() {
 219                         let id = data.get_stream().get_id();
 220                         for (i, stream) in dmx.get_streams().enumerate() {
 221                             if stream.get_id() == id {
 222                                 if let Some(ref mut pkts) = packetisers[i] {
 223                                     pkts.add_data(&data.get_buffer());
 224                                 }
 225                                 break;
 226                             }
 227                         }
 228                     } else {
 229                         *eof = true;
 230                     }
 231                 }
 232             },
 233             DemuxerObject::RawStream(ref mut ctx) => {
 234                 let mut buf = [0; 65536];
 235                 loop {
 236                     match ctx.packetiser.get_packet(ctx.stream.clone()) {
 237                         Ok(Some(mut packet)) => {
 238                             if packet.get_pts().is_none() && packet.get_duration().is_some() {
 239                                 packet.ts.pts = Some(ctx.pts);
 240                             }
 241                             ctx.pts += packet.get_duration().unwrap_or(0);
 242                             return Ok(packet);
 243                         },
 244                         Ok(None) => {},
 245                         Err(DecoderError::ShortData) => {},
 246                         _ => return Err(DemuxerError::InvalidData),
 247                     };
 248                     match ctx.br.read_buf_some(&mut buf) {
 249                         Ok(size) => {
 250                             ctx.packetiser.add_data(&buf[..size]);
 251                         },
 252                         Err(_) => {
 253                             match ctx.packetiser.get_packet(ctx.stream.clone()) {
 254                                 Ok(Some(mut packet)) => {
 255                                     if packet.get_pts().is_none() && packet.get_duration().is_some() {
 256                                         packet.ts.pts = Some(ctx.pts);
 257                                     }
 258                                     ctx.pts += packet.get_duration().unwrap_or(0);
 259                                     return Ok(packet);
 260                                 },
 261                                 Ok(None) | Err(DecoderError::ShortData) => return Err(DemuxerError::EOF),
 262                                 _ => return Err(DemuxerError::InvalidData),
 263                             };
 264                         },
 265                     };
 266                 }
 267             },
 268             _ => unreachable!(),
 269         }
 270     }
 271     pub fn seek(&mut self, seek_time: NATimePoint) -> DemuxerResult<()> {
 272         match *self {
 273             DemuxerObject::Normal(ref mut dmx) => dmx.seek(seek_time),
 274             DemuxerObject::Raw(ref mut dmx, _, _) => dmx.seek(seek_time),
 275             _ => Err(DemuxerError::NotImplemented),
 276         }
 277     }
 278 }
 279
 280 impl<'a> NAOptionHandler for DemuxerObject<'a> {
 281     fn get_supported_options(&self) -> &[NAOptionDefinition] {
 282         match *self {
 283             DemuxerObject::Normal(ref dmx) => dmx.get_supported_options(),
 284             DemuxerObject::Raw(ref dmx, _, _) => dmx.get_supported_options(),
 285             _ => &[],
 286         }
 287     }
 288     fn set_options(&mut self, options: &[NAOption]) {
 289         match *self {
 290             DemuxerObject::Normal(ref mut dmx) => dmx.set_options(options),
 291             DemuxerObject::Raw(ref mut dmx, _, _) => dmx.set_options(options),
 292             _ => {},
 293         }
 294     }
 295     fn query_option_value(&self, name: &str) -> Option<NAValue> {
 296         match *self {
 297             DemuxerObject::Normal(ref dmx) => dmx.query_option_value(name),
 298             DemuxerObject::Raw(ref dmx, _, _) => dmx.query_option_value(name),
 299             _ => None,
 300         }
 301     }
 302 }
 303
 304 pub fn detect_tags(br: &mut ByteReader) -> (bool, u64, Option<u64>) {
 305     let mut is_raw = false;
 306     let mut start = 0;
 307     let mut end = None;
 308
 309     // check for ID3v{2-4}
 310     let mut buf = [0; 5];
 311     br.peek_buf(&mut buf).unwrap();
 312     if &buf[0..3] == b"ID3" && buf[3] > 0 && buf[3] < 5 && buf[4] == 0 { //ID3 tag found, must be a raw stream
 313         br.read_skip(6).unwrap();
 314         let mut size = 0;
 315         for _ in 0..4 {
 316             let b = br.read_byte().unwrap();
 317             if (b & 0x80) != 0 {
 318                 println!("Invalid ID3 size");
 319                 break;
 320             }
 321             size = (size << 7) | u64::from(b);
 322         }
 323         start = size + 10;
 324         is_raw = true;
 325     }
 326     // check for ID3v1
 327     br.seek(SeekFrom::End(-128)).unwrap();
 328     let off = br.tell();
 329     br.peek_buf(&mut buf[..3]).unwrap();
 330     if &buf[0..3] == b"TAG" {
 331         end = Some(off);
 332     }
 333     // check for APETAG
 334     let mut buf = [0; 8];
 335     if let Some(off) = end {
 336         br.seek(SeekFrom::Start(off - 32)).unwrap();
 337     } else {
 338         br.seek(SeekFrom::End(-32)).unwrap();
 339     }
 340     let off = br.tell();
 341     br.read_buf(&mut buf).unwrap();
 342     if &buf == b"APETAGEX" {
 343         let ver     = br.read_u32le().unwrap();
 344         let size    = u64::from(br.read_u32le().unwrap());
 345         let _items  = br.read_u32le().unwrap();
 346         let flags   = br.read_u32le().unwrap();
 347         if ver == 1000 || (flags & 0x80000000) == 0 {
 348             end = Some(off - size + 32);
 349         } else {
 350             end = Some(off - size);
 351         }
 352     }
 353
 354     (is_raw, start, end)
 355 }