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1 | use nihav_core::codecs::*; | |
2 | use nihav_core::io::byteio::*; | |
3 | ||
4 | #[derive(Default)] | |
5 | struct MidividDecoder { | |
6 | info: NACodecInfoRef, | |
7 | hams: HAMShuffler, | |
8 | lzbuf: Vec<u8>, | |
9 | width: usize, | |
10 | height: usize, | |
11 | } | |
12 | ||
13 | impl MidividDecoder { | |
14 | fn new() -> Self { | |
15 | Self::default() | |
16 | } | |
17 | } | |
18 | ||
19 | fn lz_decompress(src: &[u8], dst: &mut [u8]) -> DecoderResult<()> { | |
20 | let mut spos = 0; | |
21 | let mut dpos = 0; | |
22 | let end = src.len(); | |
23 | while spos < end { | |
24 | let oplo = src[spos] as u16; | |
25 | spos += 1; | |
26 | if spos >= end { return Err(DecoderError::ShortData); } | |
27 | let ophi = src[spos] as u16; | |
28 | spos += 1; | |
29 | let mut op = (ophi << 8) | oplo; | |
30 | for _ in 0..16 { | |
31 | if spos >= end { return Ok(()); } | |
32 | let b = src[spos]; | |
33 | spos += 1; | |
34 | ||
35 | if (op & 1) == 0 { | |
36 | validate!(dpos < dst.len()); | |
37 | dst[dpos] = b; | |
38 | dpos += 1; | |
39 | } else { | |
40 | validate!(spos < end); | |
41 | let bb = src[spos]; | |
42 | spos += 1; | |
43 | ||
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]; | |
51 | dpos += 1; | |
52 | } | |
53 | } | |
54 | op >>= 1; | |
55 | } | |
56 | } | |
57 | Ok(()) | |
58 | } | |
59 | ||
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; | |
65 | ||
66 | let (vecs, nblocks, idx_start) = if is_intra { | |
67 | (&src[4..], width / 2 * height / 2, num_vec * 12 + 4) | |
68 | } else { | |
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) | |
72 | }; | |
73 | validate!(src.len() > idx_start); | |
74 | ||
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); | |
80 | let mut hi9 = 0u8; | |
81 | let mut bits = 0u8; | |
82 | for y in (0..height).step_by(2) { | |
83 | for x in (0..width).step_by(2) { | |
84 | if !is_intra { | |
85 | let x4 = x >> 2; | |
86 | let flag_b = src[8 + x4/8 + (y/4) * ((width + 31) >> 5)]; | |
87 | if ((flag_b >> (x4 & 7)) & 1) == 0 { | |
88 | continue; | |
89 | } | |
90 | } | |
91 | let idx = if num_vec <= 256 { | |
92 | idx_br.read_byte()? as usize | |
93 | } else { | |
94 | if bits == 0 { | |
95 | hi9 = idx9_br.read_byte()?; | |
96 | bits = 8; | |
97 | } | |
98 | bits -= 1; | |
99 | let lo = idx_br.read_byte()? as usize; | |
100 | ||
101 | ((((hi9 >> (7 - bits)) & 1) as usize) << 8) | lo | |
102 | }; | |
103 | validate!(idx < num_vec); | |
104 | let vec = &vecs[idx * 12..]; | |
105 | ||
106 | for comp in 0..3 { | |
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]; | |
112 | } | |
113 | } | |
114 | } | |
115 | ||
116 | Ok(is_intra) | |
117 | } | |
118 | ||
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)), | |
126 | None, None, 0, 3); | |
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]; | |
132 | ||
133 | Ok(()) | |
134 | } else { | |
135 | Err(DecoderError::InvalidData) | |
136 | } | |
137 | } | |
138 | fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> { | |
139 | let src = pkt.get_buffer(); | |
140 | validate!(src.len() > 4); | |
141 | ||
142 | let size = read_u32le(&src[0..])? as usize; | |
143 | validate!(size + 8 == src.len()); | |
144 | let data_ptr; | |
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(); | |
149 | } else { | |
150 | data_ptr = &src[12..]; | |
151 | } | |
152 | ||
153 | let mut buf; | |
154 | let bufret = self.hams.clone_ref(); | |
155 | if let Some(bbuf) = bufret { | |
156 | buf = bbuf; | |
157 | } else { | |
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(); | |
162 | } | |
163 | ||
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)?; | |
166 | ||
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 }); | |
170 | Ok(frm.into_ref()) | |
171 | } | |
172 | fn flush(&mut self) { | |
173 | self.hams.clear(); | |
174 | } | |
175 | } | |
176 | ||
177 | ||
178 | pub fn get_decoder_video() -> Box<dyn NADecoder> { | |
179 | Box::new(MidividDecoder::new()) | |
180 | } | |
181 | ||
182 | #[cfg(test)] | |
183 | mod test { | |
184 | use nihav_core::codecs::RegisteredDecoders; | |
185 | use nihav_core::demuxers::RegisteredDemuxers; | |
186 | use nihav_core::test::dec_video::*; | |
187 | use crate::codecs::game_register_all_codecs; | |
188 | use nihav_commonfmt::demuxers::generic_register_all_demuxers; | |
189 | #[test] | |
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); | |
195 | ||
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); | |
204 | } | |
205 | } |