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     #[allow(clippy::cast_lossless)]
  23     fn open(&mut self, strmgr: &mut StreamManager, _seek_index: &mut SeekIndex) -> DemuxerResult<()> {
  24         let src = &mut self.src;
  25
  26         let mut magic = [0u8; 4];
  27                                           src.read_buf(&mut magic)?;
  28         validate!(&magic == b"VXDS");
  29         let nframes                     = src.read_u32le()? as usize;
  30         let width                       = src.read_u32le()? as usize;
  31         let height                      = src.read_u32le()? as usize;
  32         let _unk                        = src.read_u32le()? as usize;
  33         let fps                         = src.read_u32le()?;
  34         validate!(fps > 0 && fps < 256);
  35         let srate                       = src.read_u32le()?;
  36         let num_audio_tracks            = src.read_u32le()? as usize;
  37         let _max_frame_size             = src.read_u32le()? as usize;
  38         let audio_off                   = src.read_u32le()? as u64;
  39         validate!(audio_off == 0 || audio_off >= 0x30);
  40         let vinfo_off                   = src.read_u32le()? as u64;
  41         validate!(vinfo_off == 0 || vinfo_off >= 0x30);
  42         let num_vstreams                = src.read_u32le()? as usize;
  43         if num_vstreams != 1 || num_audio_tracks > 1 {
  44             return Err(DemuxerError::NotImplemented);
  45         }
  46
  47         let vhdr = NAVideoInfo::new(width, height, false, YUV420_FORMAT);
  48         let vci = NACodecTypeInfo::Video(vhdr);
  49         let edata = [fps as u8].to_vec();
  50         let vinfo = NACodecInfo::new("vxvideo", vci, Some(edata));
  51         self.vid_id = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 1, fps, nframes as u64)).unwrap();
  52
  53         if num_audio_tracks != 0 {
  54             validate!(audio_off + ((num_audio_tracks * AUDIO_EXTRADATA_LEN) as u64) == vinfo_off);
  55             src.seek(SeekFrom::Start(audio_off))?;
  56             let mut edata = vec![0u8; AUDIO_EXTRADATA_LEN];
  57                                           src.read_buf(edata.as_mut_slice())?;
  58             let ahdr = NAAudioInfo::new(srate, 1, SND_S16P_FORMAT, 1);
  59             let ainfo = NACodecInfo::new("vxaudio", NACodecTypeInfo::Audio(ahdr), Some(edata));
  60             self.aud_id = strmgr.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, 1, srate, 0)).unwrap();
  61             self.num_afrm = nframes as u64;
  62             self.ano = 0;
  63             self.num_aud = num_audio_tracks;
  64         }
  65
  66         if num_vstreams > 0 {
  67             src.seek(SeekFrom::Start(vinfo_off))?;
  68             for _ in 0..num_vstreams {
  69                 let _smth               = src.read_u32le()?;
  70                 let offset              = src.read_u32le()? as u64;
  71                 self.video_pos = offset;
  72             }
  73         }
  74
  75         self.num_vid  = num_vstreams;
  76         self.vno = 0;
  77         self.num_vfrm = nframes as u64;
  78         Ok(())
  79     }
  80
  81     fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
  82         if self.vno >= self.num_vfrm { return Err(DemuxerError::EOF); }
  83         self.src.seek(SeekFrom::Start(self.video_pos))?;
  84         let stream = strmgr.get_stream(self.vid_id);
  85         if stream.is_none() { return Err(DemuxerError::InvalidData); }
  86         let stream = stream.unwrap();
  87         let ts = stream.make_ts(Some(self.vno), None, None);
  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     fn get_duration(&self) -> u64 { 0 }
 103 }
 104
 105 impl<'a> NAOptionHandler for VXDemuxer<'a> {
 106     fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
 107     fn set_options(&mut self, _options: &[NAOption]) { }
 108     fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
 109 }
 110
 111 impl<'a> VXDemuxer<'a> {
 112     fn new(io: &'a mut ByteReader<'a>) -> Self {
 113         Self {
 114             vid_id:     0,
 115             aud_id:     0,
 116             video_pos:  0,
 117             num_vid:    0,
 118             num_aud:    0,
 119             vno:        0,
 120             ano:        0,
 121             num_vfrm:   0,
 122             num_afrm:   0,
 123             src:        io,
 124         }
 125     }
 126 }
 127
 128 pub struct VXDemuxerCreator { }
 129
 130 impl DemuxerCreator for VXDemuxerCreator {
 131     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
 132         Box::new(VXDemuxer::new(br))
 133     }
 134     fn get_name(&self) -> &'static str { "vx" }
 135 }
 136
 137 #[cfg(test)]
 138 mod test {
 139     use super::*;
 140     use std::fs::File;
 141
 142     #[test]
 143     fn test_vx_demux() {
 144         // sample from some game
 145         let mut file = File::open("assets/Game/bioware.vx").unwrap();
 146         //let mut file = File::open("assets/Game/BS_01_Intro.vx").unwrap();
 147         //let mut file = File::open("assets/Game/sega.vx").unwrap();
 148         let mut fr = FileReader::new_read(&mut file);
 149         let mut br = ByteReader::new(&mut fr);
 150         let mut dmx = VXDemuxer::new(&mut br);
 151         let mut sm = StreamManager::new();
 152         let mut si = SeekIndex::new();
 153         dmx.open(&mut sm, &mut si).unwrap();
 154         loop {
 155             let pktres = dmx.get_frame(&mut sm);
 156             if let Err(e) = pktres {
 157                 if (e as i32) == (DemuxerError::EOF as i32) { break; }
 158                 panic!("error");
 159             }
 160             let pkt = pktres.unwrap();
 161             println!("Got {}", pkt);
 162         }
 163     }
 164 }