| 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 | } |