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             if self.fwd {
  88                 self.data[self.pos] = self.data[saddr as usize];
  89             } else {
  90                 self.data[self.pos] = self.data[saddr as usize];
  91             }
  92             self.advance();
  93         }
  94     }
  95     fn repeat(&mut self, len: usize) {
  96         let last = if self.fwd { self.data[self.pos - 1] } else { self.data[self.pos + 1] };
  97         for _ in 0..len {
  98             self.put_byte(last);
  99         }
 100     }
 101 }
 102
 103 struct BMVVideoDecoder {
 104     info:       NACodecInfoRef,
 105     pal:        [u8; 768],
 106     frame:      [u8; FRAME_W * FRAME_H],
 107 }
 108
 109 impl BMVVideoDecoder {
 110     fn new() -> Self {
 111         Self {
 112             info: NACodecInfoRef::default(), pal: [0; 768], frame: [0; FRAME_W * FRAME_H],
 113         }
 114     }
 115     fn decode_frame(&mut self, src: &[u8], bufinfo: &mut NABufferType, line: i16) -> DecoderResult<()> {
 116         let bufo = bufinfo.get_vbuf();
 117         let mut buf = bufo.unwrap();
 118         let paloff = buf.get_offset(1);
 119         let stride = buf.get_stride(0);
 120         let data = buf.get_data_mut().unwrap();
 121         let dst = data.as_mut_slice();
 122
 123         let fwd = (line <= -640) || (line >= 0);
 124
 125         let mut br = BMVReader::new(src, fwd);
 126         let mut bw = BMVWriter::new(&mut self.frame, fwd, line as isize);
 127         let mut mode = 0;
 128         while !bw.is_at_end() {
 129             let mut val = 0;
 130             let mut shift = 0;
 131             loop {
 132                 let nib = br.get_nibble() as usize;
 133                 if (nib & 0xC) != 0 {
 134                     val |= nib << shift;
 135                     break;
 136                 }
 137                 val |= nib << shift;
 138                 shift += 2;
 139             }
 140             if (val & 1) != 0 {
 141                 mode += 1;
 142             }
 143             mode += 1;
 144             if mode >= 4 {
 145                 mode -= 3;
 146             }
 147             validate!(val >= 2);
 148             let len = (val >> 1) - 1;
 149
 150             match mode {
 151                 1 => bw.copy(len),
 152                 2 => for _ in 0..len { bw.put_byte(br.get_byte()); },
 153                 3 => bw.repeat(len),
 154                 _ => unreachable!(),
 155             };
 156         }
 157
 158         for y in 0..FRAME_H {
 159             for x in 0..FRAME_W {
 160                 dst[y * stride + x] = self.frame[y * FRAME_W + x];
 161             }
 162         }
 163
 164         let dpal = &mut dst[paloff..][..768];
 165         dpal.copy_from_slice(&self.pal[0..]);
 166
 167         Ok(())
 168     }
 169 }
 170
 171 impl NADecoder for BMVVideoDecoder {
 172     fn init(&mut self, info: NACodecInfoRef) -> DecoderResult<()> {
 173         if let NACodecTypeInfo::Video(_vinfo) = info.get_properties() {
 174             let fmt = NAPixelFormaton::new(ColorModel::RGB(RGBSubmodel::RGB),
 175                                            Some(NAPixelChromaton::new(0, 0, true, 8, 0, 0, 3)),
 176                                            Some(NAPixelChromaton::new(0, 0, true, 8, 0, 1, 3)),
 177                                            Some(NAPixelChromaton::new(0, 0, true, 8, 0, 2, 3)),
 178                                            None, None,
 179                                            FORMATON_FLAG_PALETTE, 3);
 180             let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(FRAME_W, FRAME_H, false, fmt));
 181             self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
 182
 183             Ok(())
 184         } else {
 185             Err(DecoderError::InvalidData)
 186         }
 187     }
 188     fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
 189         let src = pkt.get_buffer();
 190         validate!(src.len() > 1);
 191
 192         let mut mr = MemoryReader::new_read(&src);
 193         let mut br = ByteReader::new(&mut mr);
 194         let flags                               = br.read_byte()?;
 195
 196         if (flags & BMV_COMMAND) != 0 {
 197             let size = if (flags & BMV_PRINT) != 0 { 8 } else { 10 };
 198             br.read_skip(size)?;
 199         }
 200         if (flags & BMV_PAL) != 0 {
 201             br.read_buf(&mut self.pal)?;
 202         }
 203         let line;
 204         if (flags & BMV_SCROLL) != 0 {
 205             line                                = br.read_u16le()? as i16;
 206         } else if (flags & BMV_INTRA) == BMV_INTRA {
 207             line = -640;
 208         } else {
 209             line = 0;
 210         }
 211         let pos = br.tell() as usize;
 212
 213         let bufret = alloc_video_buffer(self.info.get_properties().get_video_info().unwrap(), 0);
 214         if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
 215         let mut bufinfo = bufret.unwrap();
 216
 217         self.decode_frame(&src[pos..], &mut bufinfo, line)?;
 218
 219         let is_intra = (flags & BMV_INTRA) == BMV_INTRA;
 220         let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
 221         frm.set_keyframe(is_intra);
 222         frm.set_frame_type(if is_intra { FrameType::I } else { FrameType::P });
 223         Ok(Rc::new(RefCell::new(frm)))
 224     }
 225 }
 226
 227
 228 pub fn get_decoder_video() -> Box<NADecoder> {
 229     Box::new(BMVVideoDecoder::new())
 230 }
 231
 232 struct BMVAudioDecoder {
 233     ainfo:      NAAudioInfo,
 234     chmap:      NAChannelMap,
 235 }
 236
 237 const BMV_AUD_SCALES: [i32; 16] = [ 16512, 8256, 4128, 2064, 1032, 516, 258, 192, 129, 88, 64, 56, 48, 40, 36, 32 ];
 238
 239 impl BMVAudioDecoder {
 240     fn new() -> Self {
 241         Self {
 242             ainfo:  NAAudioInfo::new(0, 1, formats::SND_S16P_FORMAT, 0),
 243             chmap:  NAChannelMap::new(),
 244         }
 245     }
 246 }
 247
 248 fn scale_sample(samp: u8, scale: i32) -> i16 {
 249     let val = (((samp as i8) as i32) * scale) >> 5;
 250     if val < -32768 {
 251         -32768
 252     } else if val > 32767 {
 253         32767
 254     } else {
 255         val as i16
 256     }
 257 }
 258
 259 impl NADecoder for BMVAudioDecoder {
 260     fn init(&mut self, info: NACodecInfoRef) -> DecoderResult<()> {
 261         if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
 262             self.ainfo = NAAudioInfo::new(ainfo.get_sample_rate(), ainfo.get_channels(), formats::SND_S16P_FORMAT, 32);
 263             self.chmap = NAChannelMap::from_str("L,R").unwrap();
 264             Ok(())
 265         } else {
 266             Err(DecoderError::InvalidData)
 267         }
 268     }
 269     fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
 270         let info = pkt.get_stream().get_info();
 271         if let NACodecTypeInfo::Audio(_) = info.get_properties() {
 272             let pktbuf = pkt.get_buffer();
 273             validate!(pktbuf.len() > 1);
 274             let nblocks = pktbuf[0] as usize;
 275             validate!(pktbuf.len() == 1 + 65 * nblocks);
 276             let samples = nblocks * 32;
 277             let abuf = alloc_audio_buffer(self.ainfo, samples, self.chmap.clone())?;
 278             let mut adata = abuf.get_abuf_i16().unwrap();
 279             let off1 = adata.get_offset(1);
 280             let dst = adata.get_data_mut().unwrap();
 281             let psrc = &pktbuf[1..];
 282             for (n, src) in psrc.chunks_exact(65).enumerate() {
 283                 let code = src[0].rotate_right(1);
 284                 let scale0 = BMV_AUD_SCALES[(code & 0xF) as usize];
 285                 let scale1 = BMV_AUD_SCALES[(code >>  4) as usize];
 286                 let aoff0 = n * 32;
 287                 let aoff1 = aoff0 + off1;
 288                 let data = &src[1..];
 289                 for (i, samp) in data.chunks_exact(2).enumerate() {
 290                     dst[aoff0 + i] = scale_sample(samp[0], scale0);
 291                     dst[aoff1 + i] = scale_sample(samp[1], scale1);
 292                 }
 293             }
 294             let mut frm = NAFrame::new_from_pkt(pkt, info, abuf);
 295             frm.set_duration(Some(samples as u64));
 296             frm.set_keyframe(false);
 297             Ok(Rc::new(RefCell::new(frm)))
 298         } else {
 299             Err(DecoderError::InvalidData)
 300         }
 301     }
 302 }
 303
 304 pub fn get_decoder_audio() -> Box<NADecoder> {
 305     Box::new(BMVAudioDecoder::new())
 306 }
 307
 308 #[cfg(test)]
 309 mod test {
 310     use nihav_core::codecs::RegisteredDecoders;
 311     use nihav_core::demuxers::RegisteredDemuxers;
 312     use nihav_core::test::dec_video::*;
 313     use crate::codecs::game_register_all_codecs;
 314     use crate::demuxers::game_register_all_demuxers;
 315     #[test]
 316     fn test_bmv_video() {
 317         let mut dmx_reg = RegisteredDemuxers::new();
 318         game_register_all_demuxers(&mut dmx_reg);
 319         let mut dec_reg = RegisteredDecoders::new();
 320         game_register_all_codecs(&mut dec_reg);
 321
 322 //        let file = "assets/Game/PERFECT.BMV";
 323 //        let file = "assets/Game/DW2-MOUSE.BMV";
 324         let file = "assets/Game/WILDCAT.BMV";
 325         test_file_decoding("bmv", file, Some(40), true, false, None, &dmx_reg, &dec_reg);
 326     }
 327     #[test]
 328     fn test_bmv_audio() {
 329         let mut dmx_reg = RegisteredDemuxers::new();
 330         game_register_all_demuxers(&mut dmx_reg);
 331         let mut dec_reg = RegisteredDecoders::new();
 332         game_register_all_codecs(&mut dec_reg);
 333
 334         let file = "assets/Game/PERFECT.BMV";
 335 //        let file = "assets/Game/DW2-MOUSE.BMV";
 336 //        let file = "assets/Game/WILDCAT.BMV";
 337         test_decode_audio("bmv", file, None, "bmv", &dmx_reg, &dec_reg);
 338     }
 339 }