1 use nihav_core::codecs::*;
2 use nihav_core::io::byteio::*;
5 struct MidividDecoder {
19 fn lz_decompress(src: &[u8], dst: &mut [u8]) -> DecoderResult<()> {
24 let oplo = src[spos] as u16;
26 if spos >= end { return Err(DecoderError::ShortData); }
27 let ophi = src[spos] as u16;
29 let mut op = (ophi << 8) | oplo;
31 if spos >= end { return Ok(()); }
36 validate!(dpos < dst.len());
40 validate!(spos < end);
44 let offset = (((b as usize) & 0xF0) << 4) | (bb as usize);
45 let copy_len = ((b & 0xF) as usize) + 3;
46 validate!(offset <= dpos);
47 validate!(offset > 0);
48 validate!(dpos + copy_len <= dst.len());
49 for _ in 0..copy_len {
50 dst[dpos] = dst[dpos - offset];
60 fn decode_frame(frm: &mut NASimpleVideoFrame<u8>, src: &[u8], width: usize, height: usize) -> DecoderResult<bool> {
61 validate!(src.len() > 8);
62 let num_vec = read_u16le(&src[0..])? as usize;
63 validate!(num_vec <= 512);
64 let is_intra = read_u16le(&src[2..])? == 1;
66 let (vecs, nblocks, idx_start) = if is_intra {
67 (&src[4..], width / 2 * height / 2, num_vec * 12 + 4)
69 let num_blocks = read_u32le(&src[4..])? as usize;
70 let changeset_size = (width >> 5) * (height >> 2);
71 (&src[8+changeset_size..], num_blocks, num_vec * 12 + 8 + changeset_size)
73 validate!(src.len() > idx_start);
75 let src1 = if num_vec > 256 { &src[idx_start + (nblocks + 7)/8..] } else { &src[idx_start..] };
76 let mut mr = MemoryReader::new_read(src1);
77 let mut idx_br = ByteReader::new(&mut mr);
78 let mut mr = MemoryReader::new_read(&src[idx_start..]);
79 let mut idx9_br = ByteReader::new(&mut mr);
82 for y in (0..height).step_by(2) {
83 for x in (0..width).step_by(2) {
86 let flag_b = src[8 + x4/8 + (y/4) * ((width + 31) >> 5)];
87 if ((flag_b >> (x4 & 7)) & 1) == 0 {
91 let idx = if num_vec <= 256 {
92 idx_br.read_byte()? as usize
95 hi9 = idx9_br.read_byte()?;
99 let lo = idx_br.read_byte()? as usize;
101 ((((hi9 >> (7 - bits)) & 1) as usize) << 8) | lo
103 validate!(idx < num_vec);
104 let vec = &vecs[idx * 12..];
107 let dst = &mut frm.data[frm.offset[comp] + x + y * frm.stride[comp]..];
108 dst[0] = vec[0 + comp];
109 dst[1] = vec[3 + comp];
110 dst[frm.stride[comp] + 0] = vec[6 + comp];
111 dst[frm.stride[comp] + 1] = vec[9 + comp];
119 impl NADecoder for MidividDecoder {
120 fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
121 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
122 let fmt = NAPixelFormaton::new(ColorModel::YUV(YUVSubmodel::YCbCr),
123 Some(NAPixelChromaton::new(0, 0, false, 8, 0, 0, 1)),
124 Some(NAPixelChromaton::new(0, 0, false, 8, 0, 1, 1)),
125 Some(NAPixelChromaton::new(0, 0, false, 8, 0, 2, 1)),
127 self.width = vinfo.get_width();
128 self.height = vinfo.get_height();
129 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(self.width, self.height, true, fmt));
130 self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
131 self.lzbuf = vec![0; self.width * self.height * 3];
135 Err(DecoderError::InvalidData)
138 fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
139 let src = pkt.get_buffer();
140 validate!(src.len() > 4);
142 let size = read_u32le(&src[0..])? as usize;
143 validate!(size + 8 == src.len());
145 validate!(src.len() > 12);
146 if read_u32le(&src[8..])? == 0 {
147 lz_decompress(&src[12..], self.lzbuf.as_mut_slice())?;
148 data_ptr = self.lzbuf.as_slice();
150 data_ptr = &src[12..];
154 let bufret = self.hams.clone_ref();
155 if let Some(bbuf) = bufret {
158 let bufinfo = alloc_video_buffer(self.info.get_properties().get_video_info().unwrap(), 4)?;
159 buf = bufinfo.get_vbuf().unwrap();
160 self.hams.add_frame(buf);
161 buf = self.hams.get_output_frame().unwrap();
164 let mut frm = NASimpleVideoFrame::from_video_buf(&mut buf).unwrap();
165 let is_intra = decode_frame(&mut frm, data_ptr, self.width, self.height)?;
167 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), NABufferType::Video(buf));
168 frm.set_keyframe(is_intra);
169 frm.set_frame_type(if is_intra { FrameType::I } else { FrameType::P });
172 fn flush(&mut self) {
178 pub fn get_decoder_video() -> Box<dyn NADecoder + Send> {
179 Box::new(MidividDecoder::new())
184 use nihav_core::codecs::RegisteredDecoders;
185 use nihav_core::demuxers::RegisteredDemuxers;
186 use nihav_core::test::dec_video::*;
187 use crate::game_register_all_codecs;
188 use nihav_commonfmt::generic_register_all_demuxers;
190 fn test_midivid_video() {
191 let mut dmx_reg = RegisteredDemuxers::new();
192 generic_register_all_demuxers(&mut dmx_reg);
193 let mut dec_reg = RegisteredDecoders::new();
194 game_register_all_codecs(&mut dec_reg);
196 let file = "assets/Game/MVDV.avi";
197 //let file = "assets/Game/bbglogo.avi";
198 //let file = "assets/Game/close.avi";
199 //let file = "assets/Game/inland.avi";
200 //let file = "assets/Game/midway.avi";
201 //let file = "assets/Game/midway.1.avi";
202 //let file = "assets/Game/open.avi";
203 test_file_decoding("avi", file, Some(16), true, false, None, &dmx_reg, &dec_reg);