nihav-game/src/codecs/arxel_vid.rs

   1 use nihav_core::codecs::*;
   2 use nihav_core::io::byteio::*;
   3 use nihav_core::io::bitreader::*;
   4
   5 const HEADER_SIZE: usize = 0x2F;
   6
   7 const MV_2BIT: [(i8, i8); 4] = [(-1, 0), (-1, -1), (1, -1), (0, -2)];
   8 const MV_4BIT: [(i8, i8); 16] = [
   9     (-2, -3), ( 2, -3), (-1, -4), ( 1, -4),
  10     (-1, -2), ( 1, -2), ( 0, -3), ( 0, -4),
  11     (-2,  0), (-2, -1), ( 1, -1), (-2, -2),
  12     ( 2, -2), (-1, -3), ( 1, -3), ( 0, -5)
  13 ];
  14
  15 const BPP: usize = 4;
  16
  17 struct ArxelVideoDecoder {
  18     info:       NACodecInfoRef,
  19     tiles:      [u8; 65536],
  20 }
  21
  22 impl ArxelVideoDecoder {
  23     fn new() -> Self {
  24         Self {
  25             info:   NACodecInfoRef::default(),
  26             tiles:  [0; 65536],
  27         }
  28     }
  29 }
  30
  31 const RGBA_FORMAT: NAPixelFormaton = NAPixelFormaton {
  32         model: ColorModel::RGB(RGBSubmodel::RGB), components: 4,
  33         comp_info: [
  34             Some(NAPixelChromaton{ h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 2, next_elem: 4 }),
  35             Some(NAPixelChromaton{ h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 1, next_elem: 4 }),
  36             Some(NAPixelChromaton{ h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 0, next_elem: 4 }),
  37             Some(NAPixelChromaton{ h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 3, next_elem: 4 }),
  38             None ],
  39         elem_size: 4, be: false, alpha: true, palette: false };
  40
  41 impl NADecoder for ArxelVideoDecoder {
  42     fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
  43         if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
  44             let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(vinfo.get_width(), vinfo.get_height(), true, RGBA_FORMAT));
  45             self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
  46
  47             Ok(())
  48         } else {
  49             Err(DecoderError::InvalidData)
  50         }
  51     }
  52     fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
  53         let src = pkt.get_buffer();
  54         validate!(src.len() > HEADER_SIZE);
  55
  56         let mut mr = MemoryReader::new_read(&src);
  57         let mut br = ByteReader::new(&mut mr);
  58
  59         let size                            = br.read_u32le()? as usize;
  60         validate!(src.len() >= size + HEADER_SIZE);
  61         let part2_off                       = br.read_u32le()? as u64;
  62         validate!(part2_off > 0 && part2_off < (size as u64));
  63         let num_tiles                       = br.read_u16le()? as usize;
  64         validate!(num_tiles > 0 && num_tiles < 4096);
  65         let tile_size                       = br.read_u16le()? as usize;
  66         let width                           = br.read_u32le()? as usize;
  67         let height                          = br.read_u32le()? as usize;
  68
  69         let vinfo = self.info.get_properties().get_video_info().unwrap();
  70         validate!(width == vinfo.get_width());
  71         validate!(height == vinfo.get_height());
  72
  73                                               br.seek(SeekFrom::Start(part2_off + (HEADER_SIZE as u64)))?;
  74         match tile_size {
  75             2 => {
  76                 return Err(DecoderError::NotImplemented);
  77             },
  78             4 => {
  79                                               br.read_buf(&mut self.tiles[..16])?;
  80                 let off = br.tell() as usize;
  81                 let mut bir = BitReader::new(&src[off..], BitReaderMode::BE);
  82                 for tile in 1..num_tiles {
  83                     for i in 0..16 {
  84                         self.tiles[tile * 16 + i] = self.tiles[tile * 16 + i - 16];
  85                     }
  86                     let bits                = bir.read(3)? as u8 + 1;
  87                     validate!(bits < 8);
  88                     for el in self.tiles[tile * 16..][..16].iter_mut() {
  89                         let mut delta       = bir.read(bits)? as i16;
  90                         if delta != 0 && bir.read_bool()? {
  91                             delta = -delta;
  92                         }
  93                         *el = (i16::from(*el) + delta) as u8;
  94                     }
  95                 }
  96             },
  97             _ => {
  98                 validate!(tile_size > 0);
  99                                               br.read_buf(&mut self.tiles[..tile_size])?;
 100             },
 101         };
 102
 103         let bufinfo = alloc_video_buffer(vinfo, 0)?;
 104         let bufo = bufinfo.get_vbuf();
 105         let mut buf = bufo.unwrap();
 106         let stride = buf.get_stride(0);
 107         let data = buf.get_data_mut().unwrap();
 108         let dst = data.as_mut_slice();
 109
 110         let mut br = BitReader::new(&src[HEADER_SIZE..], BitReaderMode::BE);
 111         let tile_w = 4;
 112         let tsize = tile_w * BPP;
 113         let idx_bits = if num_tiles < 0x400 { 10 } else if num_tiles < 0x800 { 11 } else { 12 };
 114         for y in (0..height).step_by(2) {
 115             for x in (0..width).step_by(tile_w) {
 116                 let dst_pos = x * BPP + y * stride;
 117                 if !br.read_bool()? {
 118                     let idx             = br.read(idx_bits)? as usize;
 119                     validate!(idx < num_tiles);
 120                     dst[dst_pos..][..tsize].copy_from_slice(&self.tiles[idx * tsize..][..tsize]);
 121                 } else {
 122                     let (mv_x, mv_y) = if br.read_bool()? {
 123                             (0, -1)
 124                         } else if br.read_bool()? {
 125                             MV_2BIT[br.read(2)? as usize]
 126                         } else {
 127                             MV_4BIT[br.read(4)? as usize]
 128                         };
 129
 130                     let isrc = (dst_pos as isize) + isize::from(mv_x) * (tsize as isize) + isize::from(mv_y) * ((stride * 2) as isize);
 131                     validate!(isrc >= 0);
 132                     let src_pos = isrc as usize;
 133                     validate!(src_pos + tsize <= dst.len());
 134                     let (src, dst) = dst.split_at_mut(dst_pos);
 135                     dst[..tsize].copy_from_slice(&src[src_pos..][..tsize]);
 136                 }
 137             }
 138             // double lines
 139             let lines = &mut dst[y * stride..];
 140             let (src, dst) = lines.split_at_mut(stride);
 141             dst[..stride].copy_from_slice(src);
 142         }
 143
 144         let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
 145         frm.set_keyframe(true);
 146         frm.set_frame_type(FrameType::I);
 147         Ok(frm.into_ref())
 148     }
 149     fn flush(&mut self) {
 150     }
 151 }
 152
 153 impl NAOptionHandler for ArxelVideoDecoder {
 154     fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
 155     fn set_options(&mut self, _options: &[NAOption]) { }
 156     fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
 157 }
 158
 159
 160 pub fn get_decoder() -> Box<dyn NADecoder + Send> {
 161     Box::new(ArxelVideoDecoder::new())
 162 }
 163
 164 #[cfg(test)]
 165 mod test {
 166     use nihav_core::codecs::RegisteredDecoders;
 167     use nihav_core::demuxers::RegisteredDemuxers;
 168     use nihav_codec_support::test::dec_video::*;
 169     use crate::game_register_all_decoders;
 170     use crate::game_register_all_demuxers;
 171     // sample from the Ring game
 172     #[test]
 173     fn test_arxel_video() {
 174         let mut dmx_reg = RegisteredDemuxers::new();
 175         game_register_all_demuxers(&mut dmx_reg);
 176         let mut dec_reg = RegisteredDecoders::new();
 177         game_register_all_decoders(&mut dec_reg);
 178
 179         test_decoding("arxel-cnm", "arxel-video", "assets/Game/logo.cnm", Some(10), &dmx_reg, &dec_reg,
 180                       ExpectedTestResult::MD5([0xcf12f83a, 0xfdce1ed2, 0x2d183394, 0xa265f164]));
 181     }
 182 }