1 use nihav_core::formats;
2 use nihav_core::codecs::*;
3 use nihav_core::io::byteio::*;
6 const FRAME_W: usize = 640;
7 const FRAME_H: usize = 429;
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;
15 struct BMVReader<'a> {
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 }
28 fn advance(&mut self) {
30 if self.pos < self.src.len() - 1 { self.pos += 1; }
32 if self.pos > 0 { self.pos -= 1; }
35 fn get_byte(&mut self) -> u8 {
36 let ret = self.src[self.pos];
40 fn get_nibble(&mut self) -> u8 {
45 let val = self.get_byte();
47 self.nibble = val >> 4;
53 struct BMVWriter<'a> {
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 }
65 fn is_at_end(&self) -> bool {
67 self.pos == self.data.len() - 1
72 fn advance(&mut self) {
74 if self.pos < self.data.len() - 1 { self.pos += 1; }
76 if self.pos > 0 { self.pos -= 1; }
79 fn put_byte(&mut self, val: u8) {
80 self.data[self.pos] = val;
83 fn copy(&mut self, len: usize) {
85 let saddr = (self.pos as isize) + self.off;
86 if saddr < 0 { continue; }
88 self.data[self.pos] = self.data[saddr as usize];
90 self.data[self.pos] = self.data[saddr as usize];
95 fn repeat(&mut self, len: usize) {
96 let last = if self.fwd { self.data[self.pos - 1] } else { self.data[self.pos + 1] };
103 struct BMVVideoDecoder {
104 info: NACodecInfoRef,
106 frame: [u8; FRAME_W * FRAME_H],
109 impl BMVVideoDecoder {
112 info: NACodecInfoRef::default(), pal: [0; 768], frame: [0; FRAME_W * FRAME_H],
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();
123 let fwd = (line <= -640) || (line >= 0);
125 let mut br = BMVReader::new(src, fwd);
126 let mut bw = BMVWriter::new(&mut self.frame, fwd, line as isize);
128 while !bw.is_at_end() {
132 let nib = br.get_nibble() as usize;
133 if (nib & 0xC) != 0 {
148 let len = (val >> 1) - 1;
152 2 => for _ in 0..len { bw.put_byte(br.get_byte()); },
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];
164 let dpal = &mut dst[paloff..][..768];
165 dpal.copy_from_slice(&self.pal[0..]);
171 impl NADecoder for BMVVideoDecoder {
172 fn init(&mut self, _supp: &mut NADecoderSupport, 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)),
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();
185 Err(DecoderError::InvalidData)
188 fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
189 let src = pkt.get_buffer();
190 validate!(src.len() > 1);
192 let mut mr = MemoryReader::new_read(&src);
193 let mut br = ByteReader::new(&mut mr);
194 let flags = br.read_byte()?;
196 if (flags & BMV_COMMAND) != 0 {
197 let size = if (flags & BMV_PRINT) != 0 { 8 } else { 10 };
200 if (flags & BMV_PAL) != 0 {
201 br.read_buf(&mut self.pal)?;
204 if (flags & BMV_SCROLL) != 0 {
205 line = br.read_u16le()? as i16;
206 } else if (flags & BMV_INTRA) == BMV_INTRA {
211 let pos = br.tell() as usize;
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();
217 self.decode_frame(&src[pos..], &mut bufinfo, line)?;
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 });
228 pub fn get_decoder_video() -> Box<dyn NADecoder> {
229 Box::new(BMVVideoDecoder::new())
232 struct BMVAudioDecoder {
237 const BMV_AUD_SCALES: [i32; 16] = [ 16512, 8256, 4128, 2064, 1032, 516, 258, 192, 129, 88, 64, 56, 48, 40, 36, 32 ];
239 impl BMVAudioDecoder {
242 ainfo: NAAudioInfo::new(0, 1, formats::SND_S16P_FORMAT, 0),
243 chmap: NAChannelMap::new(),
248 fn scale_sample(samp: u8, scale: i32) -> i16 {
249 let val = (((samp as i8) as i32) * scale) >> 5;
252 } else if val > 32767 {
259 impl NADecoder for BMVAudioDecoder {
260 fn init(&mut self, _supp: &mut NADecoderSupport, 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();
266 Err(DecoderError::InvalidData)
269 fn decode(&mut self, _supp: &mut NADecoderSupport, 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];
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);
294 let mut frm = NAFrame::new_from_pkt(pkt, info, abuf);
295 frm.set_duration(Some(samples as u64));
296 frm.set_keyframe(false);
299 Err(DecoderError::InvalidData)
304 pub fn get_decoder_audio() -> Box<dyn NADecoder> {
305 Box::new(BMVAudioDecoder::new())
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;
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);
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);
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);
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);