nihav-game/src/demuxers/vx.rs

   1 use nihav_core::frame::*;
   2 use nihav_core::demuxers::*;
   3 use std::io::SeekFrom;
   4
   5 const AUDIO_EXTRADATA_LEN: usize = 3124;
   6
   7 struct VXDemuxer<'a> {
   8     src:        &'a mut ByteReader<'a>,
   9     vid_id:     usize,
  10     aud_id:     usize,
  11     video_pos:  u64,
  12     num_vid:    usize,
  13     vno:        u64,
  14     num_vfrm:   u64,
  15     num_aud:    usize,
  16     ano:        u64,
  17     num_afrm:   u64,
  18 }
  19
  20 impl<'a> DemuxCore<'a> for VXDemuxer<'a> {
  21     #[allow(unused_variables)]
  22     fn open(&mut self, strmgr: &mut StreamManager, _seek_index: &mut SeekIndex) -> DemuxerResult<()> {
  23         let src = &mut self.src;
  24
  25         let mut magic = [0u8; 4];
  26                                           src.read_buf(&mut magic)?;
  27         validate!(&magic == b"VXDS");
  28         let nframes                     = src.read_u32le()? as usize;
  29         let width                       = src.read_u32le()? as usize;
  30         let height                      = src.read_u32le()? as usize;
  31         let _unk                        = src.read_u32le()? as usize;
  32         let fps                         = src.read_u32le()?;
  33         validate!(fps > 0 && fps < 256);
  34         let srate                       = src.read_u32le()?;
  35         let num_audio_tracks            = src.read_u32le()? as usize;
  36         let _max_frame_size             = src.read_u32le()? as usize;
  37         let audio_off                   = src.read_u32le()? as u64;
  38         validate!(audio_off == 0 || audio_off >= 0x30);
  39         let vinfo_off                   = src.read_u32le()? as u64;
  40         validate!(vinfo_off == 0 || vinfo_off >= 0x30);
  41         let num_vstreams                = src.read_u32le()? as usize;
  42         if num_vstreams != 1 || num_audio_tracks > 1 {
  43             return Err(DemuxerError::NotImplemented);
  44         }
  45
  46         let vhdr = NAVideoInfo::new(width, height, false, YUV420_FORMAT);
  47         let vci = NACodecTypeInfo::Video(vhdr);
  48         let edata = [fps as u8].to_vec();
  49         let vinfo = NACodecInfo::new("vxvideo", vci, Some(edata));
  50         self.vid_id = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 1, fps)).unwrap();
  51
  52         if num_audio_tracks != 0 {
  53             validate!(audio_off + ((num_audio_tracks * AUDIO_EXTRADATA_LEN) as u64) == vinfo_off);
  54             src.seek(SeekFrom::Start(audio_off))?;
  55             let mut edata = vec![0u8; AUDIO_EXTRADATA_LEN];
  56                                           src.read_buf(edata.as_mut_slice())?;
  57             let ahdr = NAAudioInfo::new(srate, 1, SND_S16P_FORMAT, 1);
  58             let ainfo = NACodecInfo::new("vxaudio", NACodecTypeInfo::Audio(ahdr), Some(edata));
  59             self.aud_id = strmgr.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, 1, srate)).unwrap();
  60             self.num_afrm = nframes as u64;
  61             self.ano = 0;
  62             self.num_aud = num_audio_tracks;
  63         }
  64
  65         if num_vstreams > 0 {
  66             src.seek(SeekFrom::Start(vinfo_off))?;
  67             for _ in 0..num_vstreams {
  68                 let _smth               = src.read_u32le()?;
  69                 let offset              = src.read_u32le()? as u64;
  70                 self.video_pos = offset;
  71             }
  72         }
  73
  74         self.num_vid  = num_vstreams;
  75         self.vno = 0;
  76         self.num_vfrm = nframes as u64;
  77         Ok(())
  78     }
  79
  80     fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
  81         if self.vno >= self.num_vfrm { return Err(DemuxerError::EOF); }
  82         self.src.seek(SeekFrom::Start(self.video_pos))?;
  83         let stream = strmgr.get_stream(self.vid_id);
  84         if stream.is_none() { return Err(DemuxerError::InvalidData); }
  85         let stream = stream.unwrap();
  86         let (tn, td) = stream.get_timebase();
  87         let ts = NATimeInfo::new(Some(self.vno), None, None, tn, td);
  88         let size                    = self.src.read_u16le()? as usize;
  89         validate!(size > 2);
  90         let _num_achunks            = self.src.read_u16le()?;
  91         let fsize = size - 2;
  92         let pkt                     = self.src.read_packet(stream, ts, false, fsize)?;
  93         self.video_pos = self.src.tell();
  94         self.vno += 1;
  95         Ok(pkt)
  96     }
  97
  98     fn seek(&mut self, _time: NATimePoint, _seek_index: &SeekIndex) -> DemuxerResult<()> {
  99         Err(DemuxerError::NotPossible)
 100     }
 101 }
 102
 103 impl<'a> NAOptionHandler for VXDemuxer<'a> {
 104     fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
 105     fn set_options(&mut self, _options: &[NAOption]) { }
 106     fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
 107 }
 108
 109 impl<'a> VXDemuxer<'a> {
 110     fn new(io: &'a mut ByteReader<'a>) -> Self {
 111         Self {
 112             vid_id:     0,
 113             aud_id:     0,
 114             video_pos:  0,
 115             num_vid:    0,
 116             num_aud:    0,
 117             vno:        0,
 118             ano:        0,
 119             num_vfrm:   0,
 120             num_afrm:   0,
 121             src:        io,
 122         }
 123     }
 124 }
 125
 126 pub struct VXDemuxerCreator { }
 127
 128 impl DemuxerCreator for VXDemuxerCreator {
 129     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
 130         Box::new(VXDemuxer::new(br))
 131     }
 132     fn get_name(&self) -> &'static str { "vx" }
 133 }
 134
 135 #[cfg(test)]
 136 mod test {
 137     use super::*;
 138     use std::fs::File;
 139
 140     #[test]
 141     fn test_vx_demux() {
 142         let mut file = File::open("assets/Game/bioware.vx").unwrap();
 143         //let mut file = File::open("assets/Game/BS_01_Intro.vx").unwrap();
 144         //let mut file = File::open("assets/Game/sega.vx").unwrap();
 145         let mut fr = FileReader::new_read(&mut file);
 146         let mut br = ByteReader::new(&mut fr);
 147         let mut dmx = VXDemuxer::new(&mut br);
 148         let mut sm = StreamManager::new();
 149         let mut si = SeekIndex::new();
 150         dmx.open(&mut sm, &mut si).unwrap();
 151         loop {
 152             let pktres = dmx.get_frame(&mut sm);
 153             if let Err(e) = pktres {
 154                 if (e as i32) == (DemuxerError::EOF as i32) { break; }
 155                 panic!("error");
 156             }
 157             let pkt = pktres.unwrap();
 158             println!("Got {}", pkt);
 159         }
 160     }
 161 }