nihav-game/src/codecs/bmv.rs

   1 use nihav_core::formats;
   2 use nihav_core::codecs::*;
   3 use nihav_core::io::byteio::*;
   4 use std::str::FromStr;
   5
   6 const FRAME_W: usize = 640;
   7 const FRAME_H: usize = 429;
   8
   9 const BMV_INTRA:    u8 = 0x03;
  10 const BMV_SCROLL:   u8 = 0x04;
  11 const BMV_PAL:      u8 = 0x08;
  12 const BMV_COMMAND:  u8 = 0x10;
  13 const BMV_PRINT:    u8 = 0x80;
  14
  15 struct BMVReader<'a> {
  16     src:        &'a [u8],
  17     pos:        usize,
  18     fwd:        bool,
  19     nibble:     u8,
  20     saved:      bool,
  21 }
  22
  23 impl<'a> BMVReader<'a> {
  24     fn new(src: &'a [u8], fwd: bool) -> Self {
  25         let pos = if fwd { 0 } else { src.len() - 1 };
  26         Self { src, pos, fwd, nibble: 0, saved: false }
  27     }
  28     fn advance(&mut self) {
  29         if self.fwd {
  30             if self.pos < self.src.len() - 1 { self.pos += 1; }
  31         } else {
  32             if self.pos > 0 { self.pos -= 1; }
  33         }
  34     }
  35     fn get_byte(&mut self) -> u8 {
  36         let ret = self.src[self.pos];
  37         self.advance();
  38         ret
  39     }
  40     fn get_nibble(&mut self) -> u8 {
  41         if self.saved {
  42             self.saved = false;
  43             self.nibble
  44         } else {
  45             let val = self.get_byte();
  46             self.saved = true;
  47             self.nibble = val >> 4;
  48             val & 0xF
  49         }
  50     }
  51 }
  52
  53 struct BMVWriter<'a> {
  54     data:       &'a mut [u8],
  55     pos:        usize,
  56     fwd:        bool,
  57     off:        isize,
  58 }
  59
  60 impl<'a> BMVWriter<'a> {
  61     fn new(data: &'a mut [u8], fwd: bool, off: isize) -> Self {
  62         let pos = if fwd { 0 } else { data.len() - 1 };
  63         Self { data, pos, fwd, off }
  64     }
  65     fn is_at_end(&self) -> bool {
  66         if self.fwd {
  67             self.pos == self.data.len() - 1
  68         } else {
  69             self.pos == 0
  70         }
  71     }
  72     fn advance(&mut self) {
  73         if self.fwd {
  74             if self.pos < self.data.len() - 1 { self.pos += 1; }
  75         } else {
  76             if self.pos > 0 { self.pos -= 1; }
  77         }
  78     }
  79     fn put_byte(&mut self, val: u8) {
  80         self.data[self.pos] = val;
  81         self.advance();
  82     }
  83     fn copy(&mut self, len: usize) {
  84         for _ in 0..len {
  85             let saddr = (self.pos as isize) + self.off;
  86             if saddr < 0 { continue; }
  87             self.data[self.pos] = self.data[saddr as usize];
  88             self.advance();
  89         }
  90     }
  91     fn repeat(&mut self, len: usize) {
  92         let last = if self.fwd { self.data[self.pos - 1] } else { self.data[self.pos + 1] };
  93         for _ in 0..len {
  94             self.put_byte(last);
  95         }
  96     }
  97 }
  98
  99 struct BMVVideoDecoder {
 100     info:       NACodecInfoRef,
 101     pal:        [u8; 768],
 102     frame:      [u8; FRAME_W * FRAME_H],
 103 }
 104
 105 impl BMVVideoDecoder {
 106     fn new() -> Self {
 107         Self {
 108             info: NACodecInfoRef::default(), pal: [0; 768], frame: [0; FRAME_W * FRAME_H],
 109         }
 110     }
 111     fn decode_frame(&mut self, src: &[u8], bufinfo: &mut NABufferType, line: i16) -> DecoderResult<()> {
 112         let bufo = bufinfo.get_vbuf();
 113         let mut buf = bufo.unwrap();
 114         let paloff = buf.get_offset(1);
 115         let stride = buf.get_stride(0);
 116         let data = buf.get_data_mut().unwrap();
 117         let dst = data.as_mut_slice();
 118
 119         let fwd = (line <= -640) || (line >= 0);
 120
 121         let mut br = BMVReader::new(src, fwd);
 122         let mut bw = BMVWriter::new(&mut self.frame, fwd, line as isize);
 123         let mut mode = 0;
 124         while !bw.is_at_end() {
 125             let mut val = 0;
 126             let mut shift = 0;
 127             loop {
 128                 let nib = br.get_nibble() as usize;
 129                 if (nib & 0xC) != 0 {
 130                     val |= nib << shift;
 131                     break;
 132                 }
 133                 val |= nib << shift;
 134                 shift += 2;
 135             }
 136             if (val & 1) != 0 {
 137                 mode += 1;
 138             }
 139             mode += 1;
 140             if mode >= 4 {
 141                 mode -= 3;
 142             }
 143             validate!(val >= 2);
 144             let len = (val >> 1) - 1;
 145
 146             match mode {
 147                 1 => bw.copy(len),
 148                 2 => for _ in 0..len { bw.put_byte(br.get_byte()); },
 149                 3 => bw.repeat(len),
 150                 _ => unreachable!(),
 151             };
 152         }
 153
 154         for y in 0..FRAME_H {
 155             for x in 0..FRAME_W {
 156                 dst[y * stride + x] = self.frame[y * FRAME_W + x];
 157             }
 158         }
 159
 160         let dpal = &mut dst[paloff..][..768];
 161         dpal.copy_from_slice(&self.pal[0..]);
 162
 163         Ok(())
 164     }
 165 }
 166
 167 impl NADecoder for BMVVideoDecoder {
 168     fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
 169         if let NACodecTypeInfo::Video(_vinfo) = info.get_properties() {
 170             let fmt = NAPixelFormaton::new(ColorModel::RGB(RGBSubmodel::RGB),
 171                                            Some(NAPixelChromaton::new(0, 0, true, 8, 0, 0, 3)),
 172                                            Some(NAPixelChromaton::new(0, 0, true, 8, 0, 1, 3)),
 173                                            Some(NAPixelChromaton::new(0, 0, true, 8, 0, 2, 3)),
 174                                            None, None,
 175                                            FORMATON_FLAG_PALETTE, 3);
 176             let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(FRAME_W, FRAME_H, false, fmt));
 177             self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
 178
 179             Ok(())
 180         } else {
 181             Err(DecoderError::InvalidData)
 182         }
 183     }
 184     fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
 185         let src = pkt.get_buffer();
 186         validate!(src.len() > 1);
 187
 188         let mut mr = MemoryReader::new_read(&src);
 189         let mut br = ByteReader::new(&mut mr);
 190         let flags                               = br.read_byte()?;
 191
 192         if (flags & BMV_COMMAND) != 0 {
 193             let size = if (flags & BMV_PRINT) != 0 { 8 } else { 10 };
 194             br.read_skip(size)?;
 195         }
 196         if (flags & BMV_PAL) != 0 {
 197             br.read_buf(&mut self.pal)?;
 198         }
 199         let line;
 200         if (flags & BMV_SCROLL) != 0 {
 201             line                                = br.read_u16le()? as i16;
 202         } else if (flags & BMV_INTRA) == BMV_INTRA {
 203             line = -640;
 204         } else {
 205             line = 0;
 206         }
 207         let pos = br.tell() as usize;
 208
 209         let mut bufinfo = alloc_video_buffer(self.info.get_properties().get_video_info().unwrap(), 0)?;
 210
 211         self.decode_frame(&src[pos..], &mut bufinfo, line)?;
 212
 213         let is_intra = (flags & BMV_INTRA) == BMV_INTRA;
 214         let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
 215         frm.set_keyframe(is_intra);
 216         frm.set_frame_type(if is_intra { FrameType::I } else { FrameType::P });
 217         Ok(frm.into_ref())
 218     }
 219 }
 220
 221
 222 pub fn get_decoder_video() -> Box<dyn NADecoder> {
 223     Box::new(BMVVideoDecoder::new())
 224 }
 225
 226 struct BMVAudioDecoder {
 227     ainfo:      NAAudioInfo,
 228     chmap:      NAChannelMap,
 229 }
 230
 231 const BMV_AUD_SCALES: [i32; 16] = [ 16512, 8256, 4128, 2064, 1032, 516, 258, 192, 129, 88, 64, 56, 48, 40, 36, 32 ];
 232
 233 impl BMVAudioDecoder {
 234     fn new() -> Self {
 235         Self {
 236             ainfo:  NAAudioInfo::new(0, 1, formats::SND_S16P_FORMAT, 0),
 237             chmap:  NAChannelMap::new(),
 238         }
 239     }
 240 }
 241
 242 fn scale_sample(samp: u8, scale: i32) -> i16 {
 243     let val = (i32::from(samp as i8) * scale) >> 5;
 244     if val < -32768 {
 245         -32768
 246     } else if val > 32767 {
 247         32767
 248     } else {
 249         val as i16
 250     }
 251 }
 252
 253 impl NADecoder for BMVAudioDecoder {
 254     fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
 255         if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
 256             self.ainfo = NAAudioInfo::new(ainfo.get_sample_rate(), ainfo.get_channels(), formats::SND_S16P_FORMAT, 32);
 257             self.chmap = NAChannelMap::from_str("L,R").unwrap();
 258             Ok(())
 259         } else {
 260             Err(DecoderError::InvalidData)
 261         }
 262     }
 263     fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
 264         let info = pkt.get_stream().get_info();
 265         if let NACodecTypeInfo::Audio(_) = info.get_properties() {
 266             let pktbuf = pkt.get_buffer();
 267             validate!(pktbuf.len() > 1);
 268             let nblocks = pktbuf[0] as usize;
 269             validate!(pktbuf.len() == 1 + 65 * nblocks);
 270             let samples = nblocks * 32;
 271             let abuf = alloc_audio_buffer(self.ainfo, samples, self.chmap.clone())?;
 272             let mut adata = abuf.get_abuf_i16().unwrap();
 273             let off1 = adata.get_offset(1);
 274             let dst = adata.get_data_mut().unwrap();
 275             let psrc = &pktbuf[1..];
 276             for (n, src) in psrc.chunks_exact(65).enumerate() {
 277                 let code = src[0].rotate_right(1);
 278                 let scale0 = BMV_AUD_SCALES[(code & 0xF) as usize];
 279                 let scale1 = BMV_AUD_SCALES[(code >>  4) as usize];
 280                 let aoff0 = n * 32;
 281                 let aoff1 = aoff0 + off1;
 282                 let data = &src[1..];
 283                 for (i, samp) in data.chunks_exact(2).enumerate() {
 284                     dst[aoff0 + i] = scale_sample(samp[0], scale0);
 285                     dst[aoff1 + i] = scale_sample(samp[1], scale1);
 286                 }
 287             }
 288             let mut frm = NAFrame::new_from_pkt(pkt, info, abuf);
 289             frm.set_duration(Some(samples as u64));
 290             frm.set_keyframe(false);
 291             Ok(frm.into_ref())
 292         } else {
 293             Err(DecoderError::InvalidData)
 294         }
 295     }
 296 }
 297
 298 pub fn get_decoder_audio() -> Box<dyn NADecoder> {
 299     Box::new(BMVAudioDecoder::new())
 300 }
 301
 302 #[cfg(test)]
 303 mod test {
 304     use nihav_core::codecs::RegisteredDecoders;
 305     use nihav_core::demuxers::RegisteredDemuxers;
 306     use nihav_core::test::dec_video::*;
 307     use crate::codecs::game_register_all_codecs;
 308     use crate::demuxers::game_register_all_demuxers;
 309     #[test]
 310     fn test_bmv_video() {
 311         let mut dmx_reg = RegisteredDemuxers::new();
 312         game_register_all_demuxers(&mut dmx_reg);
 313         let mut dec_reg = RegisteredDecoders::new();
 314         game_register_all_codecs(&mut dec_reg);
 315
 316 //        let file = "assets/Game/PERFECT.BMV";
 317 //        let file = "assets/Game/DW2-MOUSE.BMV";
 318         let file = "assets/Game/WILDCAT.BMV";
 319         test_file_decoding("bmv", file, Some(40), true, false, None, &dmx_reg, &dec_reg);
 320     }
 321     #[test]
 322     fn test_bmv_audio() {
 323         let mut dmx_reg = RegisteredDemuxers::new();
 324         game_register_all_demuxers(&mut dmx_reg);
 325         let mut dec_reg = RegisteredDecoders::new();
 326         game_register_all_codecs(&mut dec_reg);
 327
 328         let file = "assets/Game/PERFECT.BMV";
 329 //        let file = "assets/Game/DW2-MOUSE.BMV";
 330 //        let file = "assets/Game/WILDCAT.BMV";
 331         test_decode_audio("bmv", file, None, "bmv", &dmx_reg, &dec_reg);
 332     }
 333 }