| 1 | use nihav_core::frame::*; |
| 2 | use nihav_core::formats; |
| 3 | use nihav_core::formats::{NAChannelType, NAChannelMap}; |
| 4 | use nihav_core::codecs::*; |
| 5 | use nihav_core::io::byteio::*; |
| 6 | |
| 7 | struct GremlinVideoDecoder { |
| 8 | info: NACodecInfoRef, |
| 9 | pal: [u8; 768], |
| 10 | frame: Vec<u8>, |
| 11 | scale_v: bool, |
| 12 | scale_h: bool, |
| 13 | } |
| 14 | |
| 15 | struct Bits8 { |
| 16 | queue: u8, |
| 17 | fill: u8, |
| 18 | } |
| 19 | |
| 20 | struct Bits32 { |
| 21 | queue: u32, |
| 22 | fill: u8, |
| 23 | } |
| 24 | |
| 25 | const PREAMBLE_SIZE: usize = 4096; |
| 26 | |
| 27 | impl Bits8 { |
| 28 | fn new() -> Self { Bits8 { queue: 0, fill: 0 } } |
| 29 | fn read_2bits(&mut self, br: &mut ByteReader) -> ByteIOResult<u8> { |
| 30 | if self.fill == 0 { |
| 31 | self.queue = br.read_byte()?; |
| 32 | self.fill += 8; |
| 33 | } |
| 34 | let res = self.queue >> 6; |
| 35 | self.queue <<= 2; |
| 36 | self.fill -= 2; |
| 37 | Ok(res) |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | impl Bits32 { |
| 42 | fn new() -> Self { Bits32 { queue: 0, fill: 0 } } |
| 43 | fn fill(&mut self, br: &mut ByteReader) -> ByteIOResult<()> { |
| 44 | self.queue = br.read_u32le()?; |
| 45 | self.fill = 32; |
| 46 | Ok(()) |
| 47 | } |
| 48 | fn read_bits(&mut self, br: &mut ByteReader, nbits: u8) -> ByteIOResult<u32> { |
| 49 | let res = self.queue & ((1 << nbits) - 1); |
| 50 | self.queue >>= nbits; |
| 51 | self.fill -= nbits; |
| 52 | if self.fill <= 16 { |
| 53 | self.queue |= u32::from(br.read_u16le()?) << self.fill; |
| 54 | self.fill += 16; |
| 55 | } |
| 56 | Ok(res) |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | impl GremlinVideoDecoder { |
| 61 | fn new() -> Self { |
| 62 | GremlinVideoDecoder { |
| 63 | info: NACodecInfoRef::default(), pal: [0; 768], frame: Vec::new(), |
| 64 | scale_v: false, scale_h: false |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | fn lz_copy(&mut self, idx: usize, offset: isize, len: usize) -> DecoderResult<()> { |
| 69 | if idx + len > self.frame.len() { return Err(DecoderError::InvalidData); } |
| 70 | if offset == -1 { |
| 71 | let c = self.frame[idx - 1]; |
| 72 | for i in 0..len { self.frame[idx + i] = c; } |
| 73 | } else if offset < 0 { |
| 74 | let start = idx - (-offset as usize); |
| 75 | for i in 0..len { self.frame[idx + i] = self.frame[start + i]; } |
| 76 | } else { |
| 77 | if idx + (offset as usize) + len > self.frame.len() { return Err(DecoderError::InvalidData); } |
| 78 | let start = idx + (offset as usize); |
| 79 | for i in 0..len { self.frame[idx + i] = self.frame[start + i]; } |
| 80 | } |
| 81 | Ok(()) |
| 82 | } |
| 83 | |
| 84 | fn rescale(&mut self, w: usize, h: usize, scale_v: bool, scale_h: bool) { |
| 85 | if (self.scale_v == scale_v) && (self.scale_h == scale_h) { return; } |
| 86 | |
| 87 | if self.scale_h && self.scale_v { |
| 88 | for j in 0..h { |
| 89 | let y = h - j - 1; |
| 90 | for i in 0..w { |
| 91 | let x = w - i - 1; |
| 92 | self.frame[PREAMBLE_SIZE + x + y * w] = self.frame[PREAMBLE_SIZE + x/2 + (y/2) * (w/2)]; |
| 93 | } |
| 94 | } |
| 95 | } else if self.scale_h { |
| 96 | for j in 0..h { |
| 97 | let y = h - j - 1; |
| 98 | for x in 0..w { |
| 99 | self.frame[PREAMBLE_SIZE + x + y * w] = self.frame[PREAMBLE_SIZE + x + (y/2) * w]; |
| 100 | } |
| 101 | } |
| 102 | } else if self.scale_v { |
| 103 | for j in 0..h { |
| 104 | let y = h - j - 1; |
| 105 | for i in 0..w { |
| 106 | let x = w - i - 1; |
| 107 | self.frame[PREAMBLE_SIZE + x + y * w] = self.frame[PREAMBLE_SIZE + x/2 + y * (w/2)]; |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | if scale_h && scale_v { |
| 113 | for y in 0..h/2 { |
| 114 | for x in 0..w/2 { |
| 115 | self.frame[PREAMBLE_SIZE + x + y * (w/2)] = self.frame[PREAMBLE_SIZE + x*2 + y*2 * w]; |
| 116 | } |
| 117 | } |
| 118 | } else if scale_h { |
| 119 | for y in 0..h/2 { |
| 120 | for x in 0..w { |
| 121 | self.frame[PREAMBLE_SIZE + x + y * w] = self.frame[PREAMBLE_SIZE + x + y*2 * w]; |
| 122 | } |
| 123 | } |
| 124 | } else if scale_v { |
| 125 | for y in 0..h { |
| 126 | for x in 0..w/2 { |
| 127 | self.frame[PREAMBLE_SIZE + x + y * w] = self.frame[PREAMBLE_SIZE + x*2 + y * w]; |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | self.scale_v = scale_v; |
| 133 | self.scale_h = scale_h; |
| 134 | } |
| 135 | |
| 136 | fn output_frame(&mut self, bufinfo: &mut NABufferType, w: usize, h: usize) { |
| 137 | let bufo = bufinfo.get_vbuf(); |
| 138 | let mut buf = bufo.unwrap(); |
| 139 | let paloff = buf.get_offset(1); |
| 140 | let stride = buf.get_stride(0); |
| 141 | let data = buf.get_data_mut().unwrap(); |
| 142 | let dst = data.as_mut_slice(); |
| 143 | let mut sidx = PREAMBLE_SIZE; |
| 144 | let mut didx = 0; |
| 145 | |
| 146 | dst[paloff..][..768].copy_from_slice(&self.pal); |
| 147 | if !self.scale_v && !self.scale_h { |
| 148 | for _ in 0..h { |
| 149 | dst[didx..][..w].copy_from_slice(&self.frame[sidx..][..w]); |
| 150 | sidx += w; |
| 151 | didx += stride; |
| 152 | } |
| 153 | } else { |
| 154 | for y in 0..h { |
| 155 | if !self.scale_v { |
| 156 | dst[didx..][..w].copy_from_slice(&self.frame[sidx..][..w]); |
| 157 | } else { |
| 158 | for x in 0..w { dst[didx + x] = self.frame[sidx + x/2]; } |
| 159 | } |
| 160 | if !self.scale_h || ((y & 1) == 1) { |
| 161 | sidx += if !self.scale_v { w } else { w/2 }; |
| 162 | } |
| 163 | didx += stride; |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | fn decode_method2(&mut self, br: &mut ByteReader) -> DecoderResult<()> { |
| 169 | let mut bits = Bits8::new(); |
| 170 | |
| 171 | let mut size = self.info.get_properties().get_video_info().unwrap().get_width() * |
| 172 | self.info.get_properties().get_video_info().unwrap().get_height(); |
| 173 | let mut idx = PREAMBLE_SIZE; |
| 174 | if self.frame[8] != 0 { |
| 175 | for c in 0..256 { |
| 176 | for i in 0..16 { self.frame[c * 16 + i] = c as u8; } |
| 177 | } |
| 178 | } |
| 179 | while size > 0 { |
| 180 | let tag = bits.read_2bits(br)?; |
| 181 | if tag == 0 { |
| 182 | self.frame[idx] = br.read_byte()?; |
| 183 | size -= 1; |
| 184 | idx += 1; |
| 185 | } else if tag == 1 { |
| 186 | let b = br.read_byte()?; |
| 187 | let len = ((b & 0xF) as usize) + 3; |
| 188 | let bot = (b >> 4) as isize; |
| 189 | let off = ((br.read_byte()? as isize) << 4) + bot - 4096; |
| 190 | validate!(len <= size); |
| 191 | size -= len; |
| 192 | self.lz_copy(idx, off, len)?; |
| 193 | idx += len; |
| 194 | } else if tag == 2 { |
| 195 | let len = (br.read_byte()? as usize) + 2; |
| 196 | validate!(len <= size); |
| 197 | size -= len; |
| 198 | idx += len; |
| 199 | } else { |
| 200 | break; |
| 201 | } |
| 202 | } |
| 203 | Ok(()) |
| 204 | } |
| 205 | |
| 206 | fn decode_method5(&mut self, br: &mut ByteReader, skip: usize) -> DecoderResult<()> { |
| 207 | let mut bits = Bits8::new(); |
| 208 | |
| 209 | let mut size = self.info.get_properties().get_video_info().unwrap().get_width() * |
| 210 | self.info.get_properties().get_video_info().unwrap().get_height(); |
| 211 | let mut idx = PREAMBLE_SIZE; |
| 212 | validate!(size >= skip); |
| 213 | size -= skip; |
| 214 | idx += skip; |
| 215 | while size > 0 { |
| 216 | let tag = bits.read_2bits(br)?; |
| 217 | if tag == 0 { |
| 218 | self.frame[idx] = br.read_byte()?; |
| 219 | size -= 1; |
| 220 | idx += 1; |
| 221 | } else if tag == 1 { |
| 222 | let b = br.read_byte()?; |
| 223 | let len = ((b & 0xF) as usize) + 3; |
| 224 | let bot = (b >> 4) as isize; |
| 225 | let off = ((br.read_byte()? as isize) << 4) + bot - 4096; |
| 226 | validate!(len <= size); |
| 227 | size -= len; |
| 228 | self.lz_copy(idx, off, len)?; |
| 229 | idx += len; |
| 230 | } else if tag == 2 { |
| 231 | let b = br.read_byte()?; |
| 232 | if b == 0 { break; } |
| 233 | let len: usize = (if b != 0xFF { b as usize } else { br.read_u16le()? as usize }) + 1; |
| 234 | validate!(len <= size); |
| 235 | size -= len; |
| 236 | idx += len; |
| 237 | } else { |
| 238 | let b = br.read_byte()?; |
| 239 | let len = ((b & 0x3) as usize) + 2; |
| 240 | let off = -((b >> 2) as isize) - 1; |
| 241 | validate!(len <= size); |
| 242 | size -= len; |
| 243 | self.lz_copy(idx, off, len)?; |
| 244 | idx += len; |
| 245 | } |
| 246 | } |
| 247 | Ok(()) |
| 248 | } |
| 249 | |
| 250 | #[allow(clippy::identity_op)] |
| 251 | fn decode_method68(&mut self, br: &mut ByteReader, |
| 252 | skip: usize, use8: bool) -> DecoderResult<()> { |
| 253 | let mut bits = Bits32::new(); |
| 254 | |
| 255 | let mut size = self.info.get_properties().get_video_info().unwrap().get_width() * |
| 256 | self.info.get_properties().get_video_info().unwrap().get_height(); |
| 257 | let mut idx = PREAMBLE_SIZE; |
| 258 | validate!(size >= skip); |
| 259 | size -= skip; |
| 260 | idx += skip; |
| 261 | bits.fill(br)?; |
| 262 | while size > 0 { |
| 263 | let tag = bits.read_bits(br, 2)?; |
| 264 | if tag == 0 { //draw |
| 265 | let b = bits.read_bits(br, 1)?; |
| 266 | if b == 0 { |
| 267 | self.frame[idx] = br.read_byte()?; |
| 268 | size -= 1; |
| 269 | idx += 1; |
| 270 | } else { |
| 271 | let mut len: usize = 2; |
| 272 | let mut lbits = 0; |
| 273 | loop { |
| 274 | lbits += 1; |
| 275 | let val = bits.read_bits(br, lbits)?; |
| 276 | len += val as usize; |
| 277 | if val != ((1 << lbits) - 1) { break; } |
| 278 | validate!(lbits < 16); |
| 279 | } |
| 280 | validate!(len <= size); |
| 281 | for i in 0..len { self.frame[idx + i] = br.read_byte()?; } |
| 282 | size -= len; |
| 283 | idx += len; |
| 284 | } |
| 285 | } else if tag == 1 { //skip |
| 286 | let b = bits.read_bits(br, 1)?; |
| 287 | let len: usize; |
| 288 | if b == 0 { |
| 289 | len = (bits.read_bits(br, 4)? as usize) + 2; |
| 290 | } else { |
| 291 | let bb = br.read_byte()?; |
| 292 | if (bb & 0x80) == 0 { |
| 293 | len = (bb as usize) + 18; |
| 294 | } else { |
| 295 | let top = ((bb & 0x7F) as usize) << 8; |
| 296 | len = top + (br.read_byte()? as usize) + 146; |
| 297 | } |
| 298 | } |
| 299 | validate!(len <= size); |
| 300 | size -= len; |
| 301 | idx += len; |
| 302 | } else if tag == 2 { |
| 303 | let subtag = bits.read_bits(br, 2)? as usize; |
| 304 | if subtag != 3 { |
| 305 | let top = (bits.read_bits(br, 4)? as usize) << 8; |
| 306 | let offs = top + (br.read_byte()? as usize); |
| 307 | if (subtag != 0) || (offs <= 0xF80) { |
| 308 | let len = (subtag as usize) + 3; |
| 309 | self.lz_copy(idx, (offs as isize) - 4096, len)?; |
| 310 | idx += len; |
| 311 | } else { |
| 312 | if offs == 0xFFF { return Ok(()); } |
| 313 | let real_off = ((offs >> 4) & 0x7) + 1; |
| 314 | let len = ((offs & 0xF) + 2) * 2; |
| 315 | validate!(len <= size); |
| 316 | size -= len; |
| 317 | let c1 = self.frame[idx - real_off]; |
| 318 | let c2 = self.frame[idx - real_off + 1]; |
| 319 | for i in 0..len/2 { |
| 320 | self.frame[idx + i*2 + 0] = c1; |
| 321 | self.frame[idx + i*2 + 1] = c2; |
| 322 | } |
| 323 | idx += len; |
| 324 | } |
| 325 | } else { |
| 326 | let b = br.read_byte()?; |
| 327 | let off = ((b & 0x7F) as usize) + 1; |
| 328 | let len = if (b & 0x80) == 0 { 2 } else { 3 }; |
| 329 | validate!(len <= size); |
| 330 | size -= len; |
| 331 | self.lz_copy(idx, -(off as isize), len)?; |
| 332 | idx += len; |
| 333 | } |
| 334 | } else { |
| 335 | let len: usize; |
| 336 | let off: isize; |
| 337 | if use8 { |
| 338 | let b = br.read_byte()?; |
| 339 | if (b & 0xC0) == 0xC0 { |
| 340 | len = ((b & 0x3F) as usize) + 8; |
| 341 | let q = bits.read_bits(br, 4)? as isize; |
| 342 | off = (q << 8) + (br.read_byte()? as isize) + 1; |
| 343 | } else { |
| 344 | let ofs1: isize; |
| 345 | if (b & 0x80) == 0 { |
| 346 | len = ((b >> 4) as usize) + 6; |
| 347 | ofs1 = (b & 0xF) as isize; |
| 348 | } else { |
| 349 | len = ((b & 0x3F) as usize) + 14; |
| 350 | ofs1 = bits.read_bits(br, 4)? as isize; |
| 351 | } |
| 352 | off = (ofs1 << 8) + (br.read_byte()? as isize) - 4096; |
| 353 | } |
| 354 | } else { |
| 355 | let b = br.read_byte()?; |
| 356 | if (b >> 4) == 0xF { |
| 357 | len = (br.read_byte()? as usize) + 21; |
| 358 | } else { |
| 359 | len = ((b >> 4) as usize) + 6; |
| 360 | } |
| 361 | let ofs1 = (b & 0xF) as isize; |
| 362 | off = (ofs1 << 8) + (br.read_byte()? as isize) - 4096; |
| 363 | } |
| 364 | validate!(len <= size); |
| 365 | size -= len; |
| 366 | self.lz_copy(idx, off, len)?; |
| 367 | idx += len; |
| 368 | } |
| 369 | } |
| 370 | Ok(()) |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | impl NADecoder for GremlinVideoDecoder { |
| 375 | fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> { |
| 376 | if let NACodecTypeInfo::Video(vinfo) = info.get_properties() { |
| 377 | let w = vinfo.get_width(); |
| 378 | let h = vinfo.get_height(); |
| 379 | if !vinfo.get_format().is_paletted() { return Err(DecoderError::NotImplemented); } |
| 380 | let fmt = PAL8_FORMAT; |
| 381 | let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt)); |
| 382 | self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref(); |
| 383 | |
| 384 | self.frame.resize(PREAMBLE_SIZE + w * h, 0); |
| 385 | for i in 0..2 { |
| 386 | for j in 0..256 { |
| 387 | for k in 0..8 { |
| 388 | self.frame[i * 2048 + j * 8 + k] = j as u8; |
| 389 | } |
| 390 | } |
| 391 | } |
| 392 | let edata = info.get_extradata().unwrap(); |
| 393 | validate!(edata.len() == 768); |
| 394 | for c in 0..256 { |
| 395 | for i in 0..3 { |
| 396 | let cc = edata[c * 3 + i]; |
| 397 | self.pal[c * 3 + i] = (cc << 2) | (cc >> 4); |
| 398 | } |
| 399 | } |
| 400 | Ok(()) |
| 401 | } else { |
| 402 | Err(DecoderError::InvalidData) |
| 403 | } |
| 404 | } |
| 405 | fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { |
| 406 | let src = pkt.get_buffer(); |
| 407 | let mut mr = MemoryReader::new_read(&src); |
| 408 | let mut br = ByteReader::new(&mut mr); |
| 409 | let flags = br.read_u32le()?; |
| 410 | let w = self.info.get_properties().get_video_info().unwrap().get_width(); |
| 411 | let h = self.info.get_properties().get_video_info().unwrap().get_height(); |
| 412 | |
| 413 | let cmethod = flags & 0xF; |
| 414 | let is_intra = (flags & 0x40) != 0; |
| 415 | let scale_v = (flags & 0x10) != 0; |
| 416 | let scale_h = (flags & 0x20) != 0; |
| 417 | |
| 418 | self.rescale(w, h, scale_v, scale_h); |
| 419 | |
| 420 | if (cmethod == 0) || (cmethod == 1) { |
| 421 | for c in 0..256 { |
| 422 | for i in 0..3 { |
| 423 | let b = br.read_byte()?; |
| 424 | self.pal[c * 3 + i] = (b << 2) | (b >> 4); |
| 425 | } |
| 426 | } |
| 427 | if cmethod == 1 { |
| 428 | for i in PREAMBLE_SIZE..self.frame.len() { self.frame[i] = 0x00; } |
| 429 | } |
| 430 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), NABufferType::None); |
| 431 | frm.set_keyframe(false); |
| 432 | frm.set_frame_type(FrameType::Skip); |
| 433 | return Ok(frm.into_ref()) |
| 434 | } else if cmethod == 3 { |
| 435 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), NABufferType::None); |
| 436 | frm.set_keyframe(false); |
| 437 | frm.set_frame_type(FrameType::Skip); |
| 438 | return Ok(frm.into_ref()) |
| 439 | } else if cmethod == 2 { |
| 440 | self.decode_method2(&mut br)?; |
| 441 | } else if cmethod == 5 { |
| 442 | self.decode_method5(&mut br, (flags >> 8) as usize)?; |
| 443 | } else if cmethod == 6 { |
| 444 | self.decode_method68(&mut br, (flags >> 8) as usize, false)?; |
| 445 | } else if cmethod == 8 { |
| 446 | self.decode_method68(&mut br, (flags >> 8) as usize, true)?; |
| 447 | } else { |
| 448 | return Err(DecoderError::NotImplemented); |
| 449 | } |
| 450 | |
| 451 | let mut bufinfo = alloc_video_buffer(self.info.get_properties().get_video_info().unwrap(), 0)?; |
| 452 | |
| 453 | self.output_frame(&mut bufinfo, w, h); |
| 454 | |
| 455 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo); |
| 456 | frm.set_keyframe(is_intra); |
| 457 | frm.set_frame_type(if is_intra { FrameType::I } else { FrameType::P }); |
| 458 | Ok(frm.into_ref()) |
| 459 | } |
| 460 | fn flush(&mut self) { |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | impl NAOptionHandler for GremlinVideoDecoder { |
| 465 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } |
| 466 | fn set_options(&mut self, _options: &[NAOption]) { } |
| 467 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } |
| 468 | } |
| 469 | |
| 470 | pub fn get_decoder_video() -> Box<dyn NADecoder + Send> { |
| 471 | Box::new(GremlinVideoDecoder::new()) |
| 472 | } |
| 473 | |
| 474 | struct GremlinAudioDecoder { |
| 475 | ainfo: NAAudioInfo, |
| 476 | chmap: NAChannelMap, |
| 477 | delta_tab: [i16; 256], |
| 478 | state0: i16, |
| 479 | state1: i16, |
| 480 | } |
| 481 | |
| 482 | impl GremlinAudioDecoder { |
| 483 | fn new() -> Self { |
| 484 | let mut delta_tab: [i16; 256] = [0; 256]; |
| 485 | let mut delta = 0; |
| 486 | let mut code = 64; |
| 487 | let mut step = 45; |
| 488 | for i in 0..127 { |
| 489 | delta += code >> 5; |
| 490 | code += step; |
| 491 | step += 2; |
| 492 | delta_tab[i * 2 + 1] = delta; |
| 493 | delta_tab[i * 2 + 2] = -delta; |
| 494 | } |
| 495 | delta_tab[255] = 32767;//delta + (code >> 5); |
| 496 | GremlinAudioDecoder { |
| 497 | ainfo: NAAudioInfo::new(0, 1, formats::SND_S16_FORMAT, 0), |
| 498 | chmap: NAChannelMap::new(), |
| 499 | delta_tab, |
| 500 | state0: 0, |
| 501 | state1: 0, |
| 502 | } |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | const CHMAP_MONO: [NAChannelType; 1] = [NAChannelType::C]; |
| 507 | const CHMAP_STEREO: [NAChannelType; 2] = [NAChannelType::L, NAChannelType::R]; |
| 508 | |
| 509 | fn get_default_chmap(nch: u8) -> NAChannelMap { |
| 510 | let mut chmap = NAChannelMap::new(); |
| 511 | match nch { |
| 512 | 1 => chmap.add_channels(&CHMAP_MONO), |
| 513 | 2 => chmap.add_channels(&CHMAP_STEREO), |
| 514 | _ => (), |
| 515 | } |
| 516 | chmap |
| 517 | } |
| 518 | |
| 519 | impl NADecoder for GremlinAudioDecoder { |
| 520 | fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> { |
| 521 | if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() { |
| 522 | self.ainfo = NAAudioInfo::new(ainfo.get_sample_rate(), ainfo.get_channels(), formats::SND_S16P_FORMAT, ainfo.get_block_len()); |
| 523 | self.chmap = get_default_chmap(ainfo.get_channels()); |
| 524 | if self.chmap.num_channels() == 0 { return Err(DecoderError::InvalidData); } |
| 525 | Ok(()) |
| 526 | } else { |
| 527 | Err(DecoderError::InvalidData) |
| 528 | } |
| 529 | } |
| 530 | fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { |
| 531 | let info = pkt.get_stream().get_info(); |
| 532 | if let NACodecTypeInfo::Audio(_) = info.get_properties() { |
| 533 | let pktbuf = pkt.get_buffer(); |
| 534 | let samples = pktbuf.len() / self.chmap.num_channels(); |
| 535 | let abuf = alloc_audio_buffer(self.ainfo, samples, self.chmap.clone())?; |
| 536 | let mut adata = abuf.get_abuf_i16().unwrap(); |
| 537 | let off1 = adata.get_offset(1); |
| 538 | let buf = adata.get_data_mut().unwrap(); |
| 539 | if self.chmap.num_channels() == 2 { |
| 540 | for (i, e) in pktbuf.chunks(2).enumerate() { |
| 541 | self.state0 = self.state0.wrapping_add(self.delta_tab[e[0] as usize]); |
| 542 | buf[i] = self.state0; |
| 543 | self.state1 = self.state1.wrapping_add(self.delta_tab[e[1] as usize]); |
| 544 | buf[off1 + i] = self.state1; |
| 545 | } |
| 546 | } else { |
| 547 | for (i, e) in pktbuf.iter().enumerate() { |
| 548 | self.state0 += self.delta_tab[*e as usize]; |
| 549 | buf[i] = self.state0; |
| 550 | } |
| 551 | } |
| 552 | let mut frm = NAFrame::new_from_pkt(pkt, info, abuf); |
| 553 | frm.set_duration(Some(samples as u64)); |
| 554 | frm.set_keyframe(false); |
| 555 | Ok(frm.into_ref()) |
| 556 | } else { |
| 557 | Err(DecoderError::InvalidData) |
| 558 | } |
| 559 | } |
| 560 | fn flush(&mut self) { |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | impl NAOptionHandler for GremlinAudioDecoder { |
| 565 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } |
| 566 | fn set_options(&mut self, _options: &[NAOption]) { } |
| 567 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } |
| 568 | } |
| 569 | |
| 570 | pub fn get_decoder_audio() -> Box<dyn NADecoder + Send> { |
| 571 | Box::new(GremlinAudioDecoder::new()) |
| 572 | } |
| 573 | |
| 574 | #[cfg(test)] |
| 575 | mod test { |
| 576 | use nihav_core::codecs::RegisteredDecoders; |
| 577 | use nihav_core::demuxers::RegisteredDemuxers; |
| 578 | use nihav_codec_support::test::dec_video::*; |
| 579 | use crate::game_register_all_decoders; |
| 580 | use crate::game_register_all_demuxers; |
| 581 | |
| 582 | #[test] |
| 583 | fn test_gdv_video() { |
| 584 | let mut dmx_reg = RegisteredDemuxers::new(); |
| 585 | game_register_all_demuxers(&mut dmx_reg); |
| 586 | let mut dec_reg = RegisteredDecoders::new(); |
| 587 | game_register_all_decoders(&mut dec_reg); |
| 588 | |
| 589 | test_decoding("gdv", "gdv-video", "assets/Game/intro1.gdv", Some(10), &dmx_reg, &dec_reg, |
| 590 | ExpectedTestResult::MD5([0x7ea302bf, 0xc3e210cf, 0x6e341376, 0x9e976056])); |
| 591 | } |
| 592 | #[test] |
| 593 | fn test_gdv_audio() { |
| 594 | let mut dmx_reg = RegisteredDemuxers::new(); |
| 595 | game_register_all_demuxers(&mut dmx_reg); |
| 596 | let mut dec_reg = RegisteredDecoders::new(); |
| 597 | game_register_all_decoders(&mut dec_reg); |
| 598 | |
| 599 | test_decoding("gdv", "gdv-audio", "assets/Game/intro1.gdv", None, &dmx_reg, &dec_reg, |
| 600 | ExpectedTestResult::MD5([0xd41d8cd9, 0x8f00b204, 0xe9800998, 0xecf8427e])); |
| 601 | } |
| 602 | } |