--- /dev/null
+use nihav_core::codecs::*;
+use nihav_core::io::byteio::*;
+
+#[derive(Default)]
+struct MidividDecoder {
+ info: NACodecInfoRef,
+ hams: HAMShuffler,
+ lzbuf: Vec<u8>,
+ width: usize,
+ height: usize,
+}
+
+impl MidividDecoder {
+ fn new() -> Self {
+ Self::default()
+ }
+}
+
+fn lz_decompress(src: &[u8], dst: &mut [u8]) -> DecoderResult<()> {
+ let mut spos = 0;
+ let mut dpos = 0;
+ let end = src.len();
+ while spos < end {
+ let oplo = src[spos] as u16;
+ spos += 1;
+ if spos >= end { return Err(DecoderError::ShortData); }
+ let ophi = src[spos] as u16;
+ spos += 1;
+ let mut op = (ophi << 8) | oplo;
+ for _ in 0..16 {
+ if spos >= end { return Ok(()); }
+ let b = src[spos];
+ spos += 1;
+
+ if (op & 1) == 0 {
+ validate!(dpos < dst.len());
+ dst[dpos] = b;
+ dpos += 1;
+ } else {
+ validate!(spos < end);
+ let bb = src[spos];
+ spos += 1;
+
+ let offset = (((b as usize) & 0xF0) << 4) | (bb as usize);
+ let copy_len = ((b & 0xF) as usize) + 3;
+ validate!(offset <= dpos);
+ validate!(offset > 0);
+ validate!(dpos + copy_len <= dst.len());
+ for _ in 0..copy_len {
+ dst[dpos] = dst[dpos - offset];
+ dpos += 1;
+ }
+ }
+ op >>= 1;
+ }
+ }
+ Ok(())
+}
+
+fn decode_frame(frm: &mut NASimpleVideoFrame<u8>, src: &[u8], width: usize, height: usize) -> DecoderResult<bool> {
+ validate!(src.len() > 8);
+ let num_vec = read_u16le(&src[0..])? as usize;
+ validate!(num_vec <= 512);
+ let is_intra = read_u16le(&src[2..])? == 1;
+
+ let (vecs, nblocks, idx_start) = if is_intra {
+ (&src[4..], width / 2 * height / 2, num_vec * 12 + 4)
+ } else {
+ let num_blocks = read_u32le(&src[4..])? as usize;
+ let changeset_size = (width >> 5) * (height >> 2);
+ (&src[8+changeset_size..], num_blocks, num_vec * 12 + 8 + changeset_size)
+ };
+ validate!(src.len() > idx_start);
+
+ let src1 = if num_vec > 256 { &src[idx_start + (nblocks + 7)/8..] } else { &src[idx_start..] };
+ let mut mr = MemoryReader::new_read(src1);
+ let mut idx_br = ByteReader::new(&mut mr);
+ let mut mr = MemoryReader::new_read(&src[idx_start..]);
+ let mut idx9_br = ByteReader::new(&mut mr);
+ let mut hi9 = 0u8;
+ let mut bits = 0u8;
+ for y in (0..height).step_by(2) {
+ for x in (0..width).step_by(2) {
+ if !is_intra {
+ let x4 = x >> 2;
+ let flag_b = src[8 + x4/8 + (y/4) * ((width + 31) >> 5)];
+ if ((flag_b >> (x4 & 7)) & 1) == 0 {
+ continue;
+ }
+ }
+ let idx = if num_vec <= 256 {
+ idx_br.read_byte()? as usize
+ } else {
+ if bits == 0 {
+ hi9 = idx9_br.read_byte()?;
+ bits = 8;
+ }
+ bits -= 1;
+ let lo = idx_br.read_byte()? as usize;
+
+ ((((hi9 >> (7 - bits)) & 1) as usize) << 8) | lo
+ };
+ validate!(idx < num_vec);
+ let vec = &vecs[idx * 12..];
+
+ for comp in 0..3 {
+ let dst = &mut frm.data[frm.offset[comp] + x + y * frm.stride[comp]..];
+ dst[0] = vec[0 + comp];
+ dst[1] = vec[3 + comp];
+ dst[frm.stride[comp] + 0] = vec[6 + comp];
+ dst[frm.stride[comp] + 1] = vec[9 + comp];
+ }
+ }
+ }
+
+ Ok(is_intra)
+}
+
+impl NADecoder for MidividDecoder {
+ fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
+ if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
+ let fmt = NAPixelFormaton::new(ColorModel::YUV(YUVSubmodel::YCbCr),
+ Some(NAPixelChromaton::new(0, 0, false, 8, 0, 0, 1)),
+ Some(NAPixelChromaton::new(0, 0, false, 8, 0, 1, 1)),
+ Some(NAPixelChromaton::new(0, 0, false, 8, 0, 2, 1)),
+ None, None, 0, 3);
+ self.width = vinfo.get_width();
+ self.height = vinfo.get_height();
+ let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(self.width, self.height, true, fmt));
+ self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
+ self.lzbuf = vec![0; self.width * self.height * 3];
+
+ Ok(())
+ } else {
+ Err(DecoderError::InvalidData)
+ }
+ }
+ fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
+ let src = pkt.get_buffer();
+ validate!(src.len() > 4);
+
+ let size = read_u32le(&src[0..])? as usize;
+ validate!(size + 8 == src.len());
+ let data_ptr;
+ validate!(src.len() > 12);
+ if read_u32le(&src[8..])? == 0 {
+ lz_decompress(&src[12..], self.lzbuf.as_mut_slice())?;
+ data_ptr = self.lzbuf.as_slice();
+ } else {
+ data_ptr = &src[12..];
+ }
+
+ let mut buf;
+ let bufret = self.hams.clone_ref();
+ if let Some(bbuf) = bufret {
+ buf = bbuf;
+ } else {
+ let bufinfo = alloc_video_buffer(self.info.get_properties().get_video_info().unwrap(), 4)?;
+ buf = bufinfo.get_vbuf().unwrap();
+ self.hams.add_frame(buf);
+ buf = self.hams.get_output_frame().unwrap();
+ }
+
+ let mut frm = NASimpleVideoFrame::from_video_buf(&mut buf).unwrap();
+ let is_intra = decode_frame(&mut frm, data_ptr, self.width, self.height)?;
+
+ let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), NABufferType::Video(buf));
+ frm.set_keyframe(is_intra);
+ frm.set_frame_type(if is_intra { FrameType::I } else { FrameType::P });
+ Ok(frm.into_ref())
+ }
+}
+
+
+pub fn get_decoder_video() -> Box<dyn NADecoder> {
+ Box::new(MidividDecoder::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 nihav_commonfmt::demuxers::generic_register_all_demuxers;
+ #[test]
+ fn test_midivid_video() {
+ let mut dmx_reg = RegisteredDemuxers::new();
+ generic_register_all_demuxers(&mut dmx_reg);
+ let mut dec_reg = RegisteredDecoders::new();
+ game_register_all_codecs(&mut dec_reg);
+
+ let file = "assets/Game/MVDV.avi";
+ //let file = "assets/Game/bbglogo.avi";
+ //let file = "assets/Game/close.avi";
+ //let file = "assets/Game/inland.avi";
+ //let file = "assets/Game/midway.avi";
+ //let file = "assets/Game/midway.1.avi";
+ //let file = "assets/Game/open.avi";
+ test_file_decoding("avi", file, Some(16), true, false, None, &dmx_reg, &dec_reg);
+ }
+}
projects / nihav.git / commitdiff