X-Git-Url: https://git.nihav.org/?a=blobdiff_plain;f=nihav-game%2Fsrc%2Fcodecs%2Fbmv.rs;fp=nihav-game%2Fsrc%2Fcodecs%2Fbmv.rs;h=cea10eb272784e045b06d06dc447112678c44bb0;hb=9067c1f81447fe27bfa7e292e2dd21b29f5959cd;hp=0000000000000000000000000000000000000000;hpb=0cc09358bda53a327937e503e1166bf55b84f319;p=nihav.git

diff --git a/nihav-game/src/codecs/bmv.rs b/nihav-game/src/codecs/bmv.rs
new file mode 100644
index 0000000..cea10eb
--- /dev/null
+++ b/nihav-game/src/codecs/bmv.rs
@@ -0,0 +1,340 @@
+use nihav_core::formats;
+use nihav_core::codecs::*;
+use nihav_core::io::byteio::*;
+use std::str::FromStr;
+
+const FRAME_W: usize = 640;
+const FRAME_H: usize = 429;
+
+const BMV_INTRA:    u8 = 0x03;
+const BMV_SCROLL:   u8 = 0x04;
+const BMV_PAL:      u8 = 0x08;
+const BMV_COMMAND:  u8 = 0x10;
+const BMV_PRINT:    u8 = 0x80;
+
+struct BMVReader<'a> {
+    src:        &'a [u8],
+    pos:        usize,
+    fwd:        bool,
+    nibble:     u8,
+    saved:      bool,
+}
+
+impl<'a> BMVReader<'a> {
+    fn new(src: &'a [u8], fwd: bool) -> Self {
+        let pos = if fwd { 0 } else { src.len() - 1 };
+        Self { src, pos, fwd, nibble: 0, saved: false }
+    }
+    fn advance(&mut self) {
+        if self.fwd {
+            if self.pos < self.src.len() - 1 { self.pos += 1; }
+        } else {
+            if self.pos > 0 { self.pos -= 1; }
+        }
+    }
+    fn get_byte(&mut self) -> u8 {
+        let ret = self.src[self.pos];
+        self.advance();
+        ret
+    }
+    fn get_nibble(&mut self) -> u8 {
+        if self.saved {
+            self.saved = false;
+            self.nibble
+        } else {
+            let val = self.get_byte();
+            self.saved = true;
+            self.nibble = val >> 4;
+            val & 0xF
+        }
+    }
+}
+
+struct BMVWriter<'a> {
+    data:       &'a mut [u8],
+    pos:        usize,
+    fwd:        bool,
+    off:        isize,
+}
+
+impl<'a> BMVWriter<'a> {
+    fn new(data: &'a mut [u8], fwd: bool, off: isize) -> Self {
+        let pos = if fwd { 0 } else { data.len() - 1 };
+        Self { data, pos, fwd, off }
+    }
+    fn is_at_end(&self) -> bool {
+        if self.fwd {
+            self.pos == self.data.len() - 1
+        } else {
+            self.pos == 0
+        }
+    }
+    fn advance(&mut self) {
+        if self.fwd {
+            if self.pos < self.data.len() - 1 { self.pos += 1; }
+        } else {
+            if self.pos > 0 { self.pos -= 1; }
+        }
+    }
+    fn put_byte(&mut self, val: u8) {
+        self.data[self.pos] = val;
+        self.advance();
+    }
+    fn copy(&mut self, len: usize) {
+        for _ in 0..len {
+            let saddr = (self.pos as isize) + self.off;
+            if saddr < 0 { continue; }
+            if self.fwd {
+                self.data[self.pos] = self.data[saddr as usize];
+            } else {
+                self.data[self.pos] = self.data[saddr as usize];
+            }
+            self.advance();
+        }
+    }
+    fn repeat(&mut self, len: usize) {
+        let last = if self.fwd { self.data[self.pos - 1] } else { self.data[self.pos + 1] };
+        for _ in 0..len {
+            self.put_byte(last);
+        }
+    }
+}
+
+struct BMVVideoDecoder {
+    info:       Rc<NACodecInfo>,
+    pal:        [u8; 768],
+    frame:      [u8; FRAME_W * FRAME_H],
+}
+
+impl BMVVideoDecoder {
+    fn new() -> Self {
+        let dummy_info = Rc::new(DUMMY_CODEC_INFO);
+        Self {
+            info: dummy_info, pal: [0; 768], frame: [0; FRAME_W * FRAME_H],
+        }
+    }
+    fn decode_frame(&mut self, src: &[u8], bufinfo: &mut NABufferType, line: i16) -> DecoderResult<()> {
+        let bufo = bufinfo.get_vbuf();
+        let mut buf = bufo.unwrap();
+        let paloff = buf.get_offset(1);
+        let stride = buf.get_stride(0);
+        let mut data = buf.get_data_mut();
+        let dst = data.as_mut_slice();
+
+        let fwd = (line <= -640) || (line >= 0);
+
+        let mut br = BMVReader::new(src, fwd);
+        let mut bw = BMVWriter::new(&mut self.frame, fwd, line as isize);
+        let mut mode = 0;
+        while !bw.is_at_end() {
+            let mut val = 0;
+            let mut shift = 0;
+            loop {
+                let nib = br.get_nibble() as usize;
+                if (nib & 0xC) != 0 {
+                    val |= nib << shift;
+                    break;
+                }
+                val |= nib << shift;
+                shift += 2;
+            }
+            if (val & 1) != 0 {
+                mode += 1;
+            }
+            mode += 1;
+            if mode >= 4 {
+                mode -= 3;
+            }
+            validate!(val >= 2);
+            let len = (val >> 1) - 1;
+            
+            match mode {
+                1 => bw.copy(len),
+                2 => for _ in 0..len { bw.put_byte(br.get_byte()); },
+                3 => bw.repeat(len),
+                _ => unreachable!(),
+            };
+        }
+
+        for y in 0..FRAME_H {
+            for x in 0..FRAME_W {
+                dst[y * stride + x] = self.frame[y * FRAME_W + x];
+            }
+        }
+
+        let dpal = &mut dst[paloff..][..768];
+        dpal.copy_from_slice(&self.pal[0..]);
+
+        Ok(())
+    }
+}
+
+impl NADecoder for BMVVideoDecoder {
+    fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
+        if let NACodecTypeInfo::Video(_vinfo) = info.get_properties() {
+            let fmt = NAPixelFormaton::new(ColorModel::RGB(RGBSubmodel::RGB),
+                                           Some(NAPixelChromaton::new(0, 0, true, 8, 0, 0, 3)),
+                                           Some(NAPixelChromaton::new(0, 0, true, 8, 0, 1, 3)),
+                                           Some(NAPixelChromaton::new(0, 0, true, 8, 0, 2, 3)),
+                                           None, None,
+                                           FORMATON_FLAG_PALETTE, 3);
+            let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(FRAME_W, FRAME_H, false, fmt));
+            self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
+
+            Ok(())
+        } else {
+            Err(DecoderError::InvalidData)
+        }
+    }
+    fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
+        let src = pkt.get_buffer();
+        validate!(src.len() > 1);
+
+        let mut mr = MemoryReader::new_read(&src);
+        let mut br = ByteReader::new(&mut mr);
+        let flags                               = br.read_byte()?;
+
+        if (flags & BMV_COMMAND) != 0 {
+            let size = if (flags & BMV_PRINT) != 0 { 8 } else { 10 };
+            br.read_skip(size)?;
+        }
+        if (flags & BMV_PAL) != 0 {
+            br.read_buf(&mut self.pal)?;
+        }
+        let line;
+        if (flags & BMV_SCROLL) != 0 {
+            line                                = br.read_u16le()? as i16;
+        } else if (flags & BMV_INTRA) == BMV_INTRA {
+            line = -640;
+        } else {
+            line = 0;
+        }
+        let pos = br.tell() as usize;
+
+        let bufret = alloc_video_buffer(self.info.get_properties().get_video_info().unwrap(), 0);
+        if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
+        let mut bufinfo = bufret.unwrap();
+
+        self.decode_frame(&src[pos..], &mut bufinfo, line)?;
+
+        let is_intra = (flags & BMV_INTRA) == BMV_INTRA;
+        let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
+        frm.set_keyframe(is_intra);
+        frm.set_frame_type(if is_intra { FrameType::I } else { FrameType::P });
+        Ok(Rc::new(RefCell::new(frm)))
+    }
+}
+
+
+pub fn get_decoder_video() -> Box<NADecoder> {
+    Box::new(BMVVideoDecoder::new())
+}
+
+struct BMVAudioDecoder {
+    ainfo:      NAAudioInfo,
+    chmap:      NAChannelMap,
+}
+
+const BMV_AUD_SCALES: [i32; 16] = [ 16512, 8256, 4128, 2064, 1032, 516, 258, 192, 129, 88, 64, 56, 48, 40, 36, 32 ];
+
+impl BMVAudioDecoder {
+    fn new() -> Self {
+        Self {
+            ainfo:  NAAudioInfo::new(0, 1, formats::SND_S16P_FORMAT, 0),
+            chmap:  NAChannelMap::new(),
+        }
+    }
+}
+
+fn scale_sample(samp: u8, scale: i32) -> i16 {
+    let val = (((samp as i8) as i32) * scale) >> 5;
+    if val < -32768 {
+        -32768
+    } else if val > 32767 {
+        32767
+    } else {
+        val as i16
+    }
+}
+
+impl NADecoder for BMVAudioDecoder {
+    fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
+        if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
+            self.ainfo = NAAudioInfo::new(ainfo.get_sample_rate(), ainfo.get_channels(), formats::SND_S16P_FORMAT, 32);
+            self.chmap = NAChannelMap::from_str("L,R").unwrap();
+            Ok(())
+        } else {
+            Err(DecoderError::InvalidData)
+        }
+    }
+    fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
+        let info = pkt.get_stream().get_info();
+        if let NACodecTypeInfo::Audio(_) = info.get_properties() {
+            let pktbuf = pkt.get_buffer();
+            validate!(pktbuf.len() > 1);
+            let nblocks = pktbuf[0] as usize;
+            validate!(pktbuf.len() == 1 + 65 * nblocks);
+            let samples = nblocks * 32;
+            let mut abuf = alloc_audio_buffer(self.ainfo, samples, self.chmap.clone())?;
+            let mut adata = abuf.get_abuf_i16().unwrap();
+            let off1 = adata.get_offset(1);
+            let mut dst = adata.get_data_mut();
+            let psrc = &pktbuf[1..];
+            for (n, src) in psrc.chunks_exact(65).enumerate() {
+                let code = src[0].rotate_right(1);
+                let scale0 = BMV_AUD_SCALES[(code & 0xF) as usize];
+                let scale1 = BMV_AUD_SCALES[(code >>  4) as usize];
+                let aoff0 = n * 32;
+                let aoff1 = aoff0 + off1;
+                let data = &src[1..];
+                for (i, samp) in data.chunks_exact(2).enumerate() {
+                    dst[aoff0 + i] = scale_sample(samp[0], scale0);
+                    dst[aoff1 + i] = scale_sample(samp[1], scale1);
+                }
+            }
+            let mut frm = NAFrame::new_from_pkt(pkt, info, abuf);
+            frm.set_duration(Some(samples as u64));
+            frm.set_keyframe(false);
+            Ok(Rc::new(RefCell::new(frm)))
+        } else {
+            Err(DecoderError::InvalidData)
+        }
+    }
+}
+
+pub fn get_decoder_audio() -> Box<NADecoder> {
+    Box::new(BMVAudioDecoder::new())
+}
+
+#[cfg(test)]
+mod test {
+    use nihav_core::codecs::RegisteredDecoders;
+    use nihav_core::demuxers::RegisteredDemuxers;
+    use nihav_core::test::dec_video::*;
+    use crate::codecs::game_register_all_codecs;
+    use crate::demuxers::game_register_all_demuxers;
+    #[test]
+    fn test_bmv_video() {
+        let mut dmx_reg = RegisteredDemuxers::new();
+        game_register_all_demuxers(&mut dmx_reg);
+        let mut dec_reg = RegisteredDecoders::new();
+        game_register_all_codecs(&mut dec_reg);
+
+//        let file = "assets/PERFECT.BMV";
+//        let file = "assets/DW2-MOUSE.BMV";
+        let file = "assets/WILDCAT.BMV";
+        test_file_decoding("bmv", file, Some(40), true, false, None, &dmx_reg, &dec_reg);
+    }
+    #[test]
+    fn test_bmv_audio() {
+        let mut dmx_reg = RegisteredDemuxers::new();
+        game_register_all_demuxers(&mut dmx_reg);
+        let mut dec_reg = RegisteredDecoders::new();
+        game_register_all_codecs(&mut dec_reg);
+
+        let file = "assets/PERFECT.BMV";
+//        let file = "assets/DW2-MOUSE.BMV";
+//        let file = "assets/WILDCAT.BMV";
+        test_decode_audio("bmv", file, None, "bmv", &dmx_reg, &dec_reg);
+    }
+}