nihav-game/src/demuxers/imax.rs

   1 use nihav_core::frame::*;
   2 use nihav_core::demuxers::*;
   3 use std::sync::Arc;
   4
   5 #[allow(dead_code)]
   6 struct IMAXDemuxer<'a> {
   7     src:        &'a mut ByteReader<'a>,
   8     cur_frame:  u64,
   9     apos:       u64,
  10     a_id:       usize,
  11     v_id:       usize,
  12     pal:        Arc<[u8; 1024]>,
  13     pal_change: bool,
  14 }
  15
  16 impl<'a> DemuxCore<'a> for IMAXDemuxer<'a> {
  17     #[allow(unused_variables)]
  18     fn open(&mut self, strmgr: &mut StreamManager, _seek_index: &mut SeekIndex) -> DemuxerResult<()> {
  19         let src = &mut self.src;
  20
  21         let magic                       = src.read_tag()?;
  22         validate!(&magic == b"IMAX");
  23         let nframes                     = u64::from(src.read_u32le()?);
  24         let fps                         = u32::from(src.read_u16le()?);
  25         let magic2                      = src.read_u16le()?;
  26         validate!(magic2 == 0x102);
  27         let _zero                       = src.read_u16le()?;
  28         let _max_vframe_size            = src.read_u32le()?;
  29         let _buffering_size             = src.read_u32le()?;
  30
  31         let vhdr = NAVideoInfo::new(320, 160, false, PAL8_FORMAT);
  32         let vci = NACodecTypeInfo::Video(vhdr);
  33         let vinfo = NACodecInfo::new("fable-imax", vci, None);
  34         self.v_id = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 1, fps, nframes)).unwrap();
  35         let ahdr = NAAudioInfo::new(22050, 1, SND_U8_FORMAT, 2);
  36         let ainfo = NACodecInfo::new("pcm", NACodecTypeInfo::Audio(ahdr), None);
  37         self.a_id = strmgr.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, 1, 22050, 2)).unwrap();
  38         self.cur_frame = 0;
  39         self.apos = 0;
  40         Ok(())
  41     }
  42
  43     #[allow(unused_variables)]
  44     fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
  45         loop {
  46             let fsize                   = self.src.read_u32le()? as usize;
  47             let ftype                   = self.src.read_u32le()?;
  48
  49             match ftype {
  50                 0xAA97 => {
  51                     let str = strmgr.get_stream(self.v_id).unwrap();
  52                     let (tb_num, tb_den) = str.get_timebase();
  53                     let ts = NATimeInfo::new(Some(self.cur_frame), None, None, tb_num, tb_den);
  54                     self.cur_frame += 1;
  55                     let mut pkt = self.src.read_packet(str, ts, true, fsize)?;
  56                     pkt.add_side_data(NASideData::Palette(self.pal_change, self.pal.clone()));
  57                     self.pal_change = false;
  58                     return Ok(pkt);
  59                 },
  60                 0xAA98 => {
  61                     validate!(fsize == 768);
  62                     let mut pal = [0u8; 1024];
  63                     for chunk in pal.chunks_mut(4) {
  64                         let r           = self.src.read_byte()?;
  65                         let g           = self.src.read_byte()?;
  66                         let b           = self.src.read_byte()?;
  67                         chunk[0] = (r << 2) | (r >> 4);
  68                         chunk[1] = (g << 2) | (g >> 4);
  69                         chunk[2] = (b << 2) | (b >> 4);
  70                     }
  71                     self.pal = Arc::new(pal);
  72                     self.pal_change = true;
  73                 },
  74                 0xAA99 => {
  75                     let str = strmgr.get_stream(self.a_id).unwrap();
  76                     let (tb_num, tb_den) = str.get_timebase();
  77                     let ts = NATimeInfo::new(Some(self.apos), None, None, tb_num, tb_den);
  78                     self.apos += fsize as u64;
  79                     return self.src.read_packet(str, ts, true, fsize);
  80                 },
  81                 0xAAFF => return Err(DemuxerError::EOF),
  82                 _ => return Err(DemuxerError::InvalidData),
  83             }
  84         }
  85     }
  86
  87     fn seek(&mut self, _time: NATimePoint, _seek_index: &SeekIndex) -> DemuxerResult<()> {
  88         Err(DemuxerError::NotPossible)
  89     }
  90     fn get_duration(&self) -> u64 { 0 }
  91 }
  92 impl<'a> NAOptionHandler for IMAXDemuxer<'a> {
  93     fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
  94     fn set_options(&mut self, _options: &[NAOption]) { }
  95     fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
  96 }
  97 impl<'a> IMAXDemuxer<'a> {
  98     fn new(io: &'a mut ByteReader<'a>) -> Self {
  99         IMAXDemuxer {
 100             src:        io,
 101             cur_frame:  0,
 102             apos:       0,
 103             a_id:       0,
 104             v_id:       0,
 105             pal:        Arc::new([0; 1024]),
 106             pal_change: false,
 107         }
 108     }
 109 }
 110
 111 pub struct IMAXDemuxerCreator { }
 112
 113 impl DemuxerCreator for IMAXDemuxerCreator {
 114     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
 115         Box::new(IMAXDemuxer::new(br))
 116     }
 117     fn get_name(&self) -> &'static str { "fable-imax" }
 118 }
 119
 120 #[cfg(test)]
 121 mod test {
 122     use super::*;
 123     use std::fs::File;
 124
 125     #[test]
 126     fn test_imax_demux() {
 127         let mut file = File::open("assets/Game/present.imx").unwrap();
 128         let mut fr = FileReader::new_read(&mut file);
 129         let mut br = ByteReader::new(&mut fr);
 130         let mut dmx = IMAXDemuxer::new(&mut br);
 131         let mut sm = StreamManager::new();
 132         let mut si = SeekIndex::new();
 133         dmx.open(&mut sm, &mut si).unwrap();
 134         loop {
 135             let pktres = dmx.get_frame(&mut sm);
 136             if let Err(e) = pktres {
 137                 if (e as i32) == (DemuxerError::EOF as i32) { break; }
 138                 panic!("error");
 139             }
 140             let pkt = pktres.unwrap();
 141             println!("Got {}", pkt);
 142         }
 143     }
 144 }