--- /dev/null
+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);
+ }
+}
projects / nihav.git / blobdiff