| 1 | use nihav_core::codecs::*; |
| 2 | use nihav_core::io::byteio::*; |
| 3 | use nihav_codec_support::codecs::HAMShuffler; |
| 4 | |
| 5 | #[derive(Default)] |
| 6 | struct MidividDecoder { |
| 7 | info: NACodecInfoRef, |
| 8 | hams: HAMShuffler<u8>, |
| 9 | lzbuf: Vec<u8>, |
| 10 | width: usize, |
| 11 | height: usize, |
| 12 | } |
| 13 | |
| 14 | impl MidividDecoder { |
| 15 | fn new() -> Self { |
| 16 | Self::default() |
| 17 | } |
| 18 | } |
| 19 | |
| 20 | fn lz_decompress(src: &[u8], dst: &mut [u8]) -> DecoderResult<()> { |
| 21 | let mut spos = 0; |
| 22 | let mut dpos = 0; |
| 23 | let end = src.len(); |
| 24 | while spos < end { |
| 25 | let oplo = u16::from(src[spos]); |
| 26 | spos += 1; |
| 27 | if spos >= end { return Err(DecoderError::ShortData); } |
| 28 | let ophi = u16::from(src[spos]); |
| 29 | spos += 1; |
| 30 | let mut op = (ophi << 8) | oplo; |
| 31 | for _ in 0..16 { |
| 32 | if spos >= end { return Ok(()); } |
| 33 | let b = src[spos]; |
| 34 | spos += 1; |
| 35 | |
| 36 | if (op & 1) == 0 { |
| 37 | validate!(dpos < dst.len()); |
| 38 | dst[dpos] = b; |
| 39 | dpos += 1; |
| 40 | } else { |
| 41 | validate!(spos < end); |
| 42 | let bb = src[spos]; |
| 43 | spos += 1; |
| 44 | |
| 45 | let offset = (((b as usize) & 0xF0) << 4) | (bb as usize); |
| 46 | let copy_len = ((b & 0xF) as usize) + 3; |
| 47 | validate!(offset <= dpos); |
| 48 | validate!(offset > 0); |
| 49 | validate!(dpos + copy_len <= dst.len()); |
| 50 | for _ in 0..copy_len { |
| 51 | dst[dpos] = dst[dpos - offset]; |
| 52 | dpos += 1; |
| 53 | } |
| 54 | } |
| 55 | op >>= 1; |
| 56 | } |
| 57 | } |
| 58 | Ok(()) |
| 59 | } |
| 60 | |
| 61 | #[allow(clippy::identity_op)] |
| 62 | fn decode_frame(frm: &mut NASimpleVideoFrame<u8>, src: &[u8], width: usize, height: usize) -> DecoderResult<bool> { |
| 63 | validate!(src.len() > 8); |
| 64 | let num_vec = read_u16le(&src[0..])? as usize; |
| 65 | validate!(num_vec <= 512); |
| 66 | let is_intra = read_u16le(&src[2..])? == 1; |
| 67 | |
| 68 | let (vecs, nblocks, idx_start) = if is_intra { |
| 69 | (&src[4..], width / 2 * height / 2, num_vec * 12 + 4) |
| 70 | } else { |
| 71 | let num_blocks = read_u32le(&src[4..])? as usize; |
| 72 | let changeset_size = (width >> 5) * (height >> 2); |
| 73 | (&src[8+changeset_size..], num_blocks, num_vec * 12 + 8 + changeset_size) |
| 74 | }; |
| 75 | validate!(src.len() > idx_start); |
| 76 | |
| 77 | let src1 = if num_vec > 256 { &src[idx_start + (nblocks + 7)/8..] } else { &src[idx_start..] }; |
| 78 | let mut mr = MemoryReader::new_read(src1); |
| 79 | let mut idx_br = ByteReader::new(&mut mr); |
| 80 | let mut mr = MemoryReader::new_read(&src[idx_start..]); |
| 81 | let mut idx9_br = ByteReader::new(&mut mr); |
| 82 | let mut hi9 = 0u8; |
| 83 | let mut bits = 0u8; |
| 84 | for y in (0..height).step_by(2) { |
| 85 | for x in (0..width).step_by(2) { |
| 86 | if !is_intra { |
| 87 | let x4 = x >> 2; |
| 88 | let flag_b = src[8 + x4/8 + (y/4) * ((width + 31) >> 5)]; |
| 89 | if ((flag_b >> (x4 & 7)) & 1) == 0 { |
| 90 | continue; |
| 91 | } |
| 92 | } |
| 93 | let idx = if num_vec <= 256 { |
| 94 | idx_br.read_byte()? as usize |
| 95 | } else { |
| 96 | if bits == 0 { |
| 97 | hi9 = idx9_br.read_byte()?; |
| 98 | bits = 8; |
| 99 | } |
| 100 | bits -= 1; |
| 101 | let lo = idx_br.read_byte()? as usize; |
| 102 | |
| 103 | ((((hi9 >> (7 - bits)) & 1) as usize) << 8) | lo |
| 104 | }; |
| 105 | validate!(idx < num_vec); |
| 106 | let vec = &vecs[idx * 12..]; |
| 107 | |
| 108 | for comp in 0..3 { |
| 109 | let dst = &mut frm.data[frm.offset[comp] + x + y * frm.stride[comp]..]; |
| 110 | dst[0] = vec[0 + comp]; |
| 111 | dst[1] = vec[3 + comp]; |
| 112 | dst[frm.stride[comp] + 0] = vec[6 + comp]; |
| 113 | dst[frm.stride[comp] + 1] = vec[9 + comp]; |
| 114 | } |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | Ok(is_intra) |
| 119 | } |
| 120 | |
| 121 | impl NADecoder for MidividDecoder { |
| 122 | fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> { |
| 123 | if let NACodecTypeInfo::Video(vinfo) = info.get_properties() { |
| 124 | let fmt = NAPixelFormaton::new(ColorModel::YUV(YUVSubmodel::YCbCr), |
| 125 | Some(NAPixelChromaton::new(0, 0, false, 8, 0, 0, 1)), |
| 126 | Some(NAPixelChromaton::new(0, 0, false, 8, 0, 1, 1)), |
| 127 | Some(NAPixelChromaton::new(0, 0, false, 8, 0, 2, 1)), |
| 128 | None, None, 0, 3); |
| 129 | self.width = vinfo.get_width(); |
| 130 | self.height = vinfo.get_height(); |
| 131 | let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(self.width, self.height, true, fmt)); |
| 132 | self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref(); |
| 133 | self.lzbuf = vec![0; self.width * self.height * 3]; |
| 134 | |
| 135 | Ok(()) |
| 136 | } else { |
| 137 | Err(DecoderError::InvalidData) |
| 138 | } |
| 139 | } |
| 140 | fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { |
| 141 | let src = pkt.get_buffer(); |
| 142 | validate!(src.len() > 4); |
| 143 | |
| 144 | let size = read_u32le(&src[0..])? as usize; |
| 145 | validate!(size + 8 == src.len()); |
| 146 | let data_ptr; |
| 147 | validate!(src.len() > 12); |
| 148 | if read_u32le(&src[8..])? == 0 { |
| 149 | lz_decompress(&src[12..], self.lzbuf.as_mut_slice())?; |
| 150 | data_ptr = self.lzbuf.as_slice(); |
| 151 | } else { |
| 152 | data_ptr = &src[12..]; |
| 153 | } |
| 154 | |
| 155 | let mut buf; |
| 156 | let bufret = self.hams.clone_ref(); |
| 157 | if let Some(bbuf) = bufret { |
| 158 | buf = bbuf; |
| 159 | } else { |
| 160 | let bufinfo = alloc_video_buffer(self.info.get_properties().get_video_info().unwrap(), 4)?; |
| 161 | buf = bufinfo.get_vbuf().unwrap(); |
| 162 | self.hams.add_frame(buf); |
| 163 | buf = self.hams.get_output_frame().unwrap(); |
| 164 | } |
| 165 | |
| 166 | let mut frm = NASimpleVideoFrame::from_video_buf(&mut buf).unwrap(); |
| 167 | let is_intra = decode_frame(&mut frm, data_ptr, self.width, self.height)?; |
| 168 | |
| 169 | let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), NABufferType::Video(buf)); |
| 170 | frm.set_keyframe(is_intra); |
| 171 | frm.set_frame_type(if is_intra { FrameType::I } else { FrameType::P }); |
| 172 | Ok(frm.into_ref()) |
| 173 | } |
| 174 | fn flush(&mut self) { |
| 175 | self.hams.clear(); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | impl NAOptionHandler for MidividDecoder { |
| 180 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } |
| 181 | fn set_options(&mut self, _options: &[NAOption]) { } |
| 182 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } |
| 183 | } |
| 184 | |
| 185 | |
| 186 | pub fn get_decoder_video() -> Box<dyn NADecoder + Send> { |
| 187 | Box::new(MidividDecoder::new()) |
| 188 | } |
| 189 | |
| 190 | #[cfg(test)] |
| 191 | mod test { |
| 192 | use nihav_core::codecs::RegisteredDecoders; |
| 193 | use nihav_core::demuxers::RegisteredDemuxers; |
| 194 | use nihav_codec_support::test::dec_video::*; |
| 195 | use crate::game_register_all_decoders; |
| 196 | use nihav_commonfmt::generic_register_all_demuxers; |
| 197 | #[test] |
| 198 | fn test_midivid_video() { |
| 199 | let mut dmx_reg = RegisteredDemuxers::new(); |
| 200 | generic_register_all_demuxers(&mut dmx_reg); |
| 201 | let mut dec_reg = RegisteredDecoders::new(); |
| 202 | game_register_all_decoders(&mut dec_reg); |
| 203 | |
| 204 | // sample: https://samples.mplayerhq.hu/V-codecs/MVDV.avi |
| 205 | test_decoding("avi", "midivid", "assets/Game/MVDV.avi", Some(16), &dmx_reg, &dec_reg, |
| 206 | ExpectedTestResult::MD5Frames(vec![ |
| 207 | [0x383e1995, 0x32bf000d, 0x2067aa2e, 0x54425bd4], |
| 208 | [0x91d0bff6, 0x5106cb75, 0x463ba358, 0xdc17d126], |
| 209 | [0x4ce54833, 0xb4fd3e35, 0x639d3830, 0xb47f871b], |
| 210 | [0x7c0c5604, 0x3c89e3ff, 0x05ae09f5, 0x7b725143], |
| 211 | [0xc561ddd9, 0xa3515c8e, 0x6119b31a, 0xb1608e77], |
| 212 | [0xa49bb9aa, 0xaf57e55b, 0xf351d4b0, 0x6289cd91], |
| 213 | [0xc7add756, 0x45574231, 0x5f1d651b, 0x2ae29e0d], |
| 214 | [0x7dd57d54, 0x4ec83f80, 0xef2e870b, 0x6cc310fe], |
| 215 | [0xe9c5fed6, 0xa4a4bab2, 0x70f84ed6, 0xc9d8a010], |
| 216 | [0x586ba118, 0x623fd7b9, 0x480fe7ab, 0xa1a5ad6f]])); |
| 217 | } |
| 218 | } |