| 1 | use std::collections::VecDeque; |
| 2 | use nihav_core::frame::*; |
| 3 | use nihav_core::muxers::*; |
| 4 | use super::RMStreamWriter; |
| 5 | |
| 6 | static VIDEO_CODEC_REGISTRY: &[(&[u8;4], &str)] = &[ |
| 7 | (b"RV10", "realvideo1"), |
| 8 | (b"RV20", "realvideo2"), |
| 9 | (b"RVTR", "realvideo2"), |
| 10 | (b"RV30", "realvideo3"), |
| 11 | (b"RV40", "realvideo4"), |
| 12 | (b"RV60", "realvideo6"), |
| 13 | (b"CLV1", "clearvideo_rm"), |
| 14 | ]; |
| 15 | |
| 16 | pub struct DummyStreamWriter {} |
| 17 | impl RMStreamWriter for DummyStreamWriter { |
| 18 | fn write_header(&mut self, _bw: &mut ByteWriter, _stream: &NAStream) -> MuxerResult<()> { |
| 19 | Ok(()) |
| 20 | } |
| 21 | fn queue_packet(&mut self, _pkt: NAPacket, _ms: u32) -> bool { |
| 22 | true |
| 23 | } |
| 24 | fn get_packet(&mut self) -> Option<(Vec<u8>, u32, bool)> { |
| 25 | None |
| 26 | } |
| 27 | fn flush(&mut self) { } |
| 28 | fn finish(&mut self, _bw: &mut ByteWriter) -> MuxerResult<()> { |
| 29 | Ok(()) |
| 30 | } |
| 31 | fn set_pkt_size(&mut self, _pkt_size: usize) {} |
| 32 | } |
| 33 | |
| 34 | #[derive(Clone,Copy)] |
| 35 | enum VideoDataType { |
| 36 | Frame, |
| 37 | Slice{pkt_no: u8, npkt: u8, full_size: u32, offset: u32}, |
| 38 | } |
| 39 | |
| 40 | impl VideoDataType { |
| 41 | fn is_frame(self) -> bool { matches!(self, VideoDataType::Frame) } |
| 42 | } |
| 43 | |
| 44 | fn val_to_size(val: u32) -> usize { if val < (1 << 14) { 2 } else { 4 } } |
| 45 | |
| 46 | #[derive(Clone)] |
| 47 | struct VideoData { |
| 48 | vtype: VideoDataType, |
| 49 | pts: u32, |
| 50 | seq_no: u8, |
| 51 | data: Vec<u8>, |
| 52 | } |
| 53 | |
| 54 | impl VideoData { |
| 55 | fn get_pkt_len(&self) -> usize { |
| 56 | let plen = self.data.len(); |
| 57 | let ts_size = val_to_size(self.pts); |
| 58 | match self.vtype { |
| 59 | VideoDataType::Frame => plen + val_to_size(plen as u32) + ts_size + 2, |
| 60 | VideoDataType::Slice{pkt_no: _, npkt: _, full_size, offset} => plen + val_to_size(full_size) + val_to_size(offset) + 3, |
| 61 | } |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | struct VideoStreamWriter { |
| 66 | fcc: [u8; 4], |
| 67 | seq_no: u8, |
| 68 | time: u32, |
| 69 | mi_time: u32, |
| 70 | pkt_size: usize, |
| 71 | queue: VecDeque<VideoData>, |
| 72 | flush: bool, |
| 73 | } |
| 74 | |
| 75 | impl RMStreamWriter for VideoStreamWriter { |
| 76 | fn write_header(&mut self, bw: &mut ByteWriter, vstream: &NAStream) -> MuxerResult<()> { |
| 77 | let info = vstream.get_info().get_properties().get_video_info().unwrap(); |
| 78 | let start = bw.tell(); |
| 79 | |
| 80 | bw.write_u32be(0)?; // header size |
| 81 | bw.write_buf(b"VIDO")?; |
| 82 | bw.write_buf(&self.fcc)?; |
| 83 | bw.write_u16be(info.width as u16)?; |
| 84 | bw.write_u16be(info.height as u16)?; |
| 85 | bw.write_u16be(12)?; // bpp |
| 86 | bw.write_u16be(0)?; // aligned width |
| 87 | bw.write_u16be(0)?; // aligned height |
| 88 | let (tb_num, tb_den) = vstream.get_timebase(); |
| 89 | if tb_num != 0 && tb_den != 0 { |
| 90 | bw.write_u16be((tb_den / tb_num) as u16)?; |
| 91 | let mut fps_frac = tb_den % tb_num; |
| 92 | let mut div = tb_num; |
| 93 | while div >= 0x10000 { |
| 94 | fps_frac >>= 1; |
| 95 | div >>= 1; |
| 96 | } |
| 97 | fps_frac = (fps_frac << 16) / div; |
| 98 | bw.write_u16le(fps_frac as u16)?; |
| 99 | } else { |
| 100 | bw.write_u16be(0)?; |
| 101 | bw.write_u16be(0)?; |
| 102 | } |
| 103 | |
| 104 | if let Some(edata) = vstream.get_info().get_extradata() { |
| 105 | bw.write_buf(&edata)?; |
| 106 | } |
| 107 | let end = bw.tell(); |
| 108 | bw.seek(SeekFrom::Start(start))?; |
| 109 | bw.write_u32be((end - start) as u32)?; |
| 110 | bw.seek(SeekFrom::Start(end))?; |
| 111 | Ok(()) |
| 112 | } |
| 113 | fn queue_packet(&mut self, pkt: NAPacket, ms: u32) -> bool { |
| 114 | let tot_size = self.queue.iter().fold(0usize, |acc, q| acc + q.get_pkt_len()); |
| 115 | if tot_size > self.pkt_size { |
| 116 | return false; |
| 117 | } |
| 118 | |
| 119 | self.time = ms; |
| 120 | if ms > 0 { |
| 121 | self.mi_time = ms.max(self.mi_time + 1); |
| 122 | } |
| 123 | |
| 124 | let src = pkt.get_buffer(); |
| 125 | let nslices = usize::from(src[0]) + 1; |
| 126 | let hdr_size = nslices * 8 + 1; |
| 127 | |
| 128 | if nslices == 1 { |
| 129 | self.queue.push_back(VideoData { |
| 130 | vtype: VideoDataType::Frame, |
| 131 | pts: self.mi_time, |
| 132 | seq_no: self.seq_no, |
| 133 | data: src[9..].to_vec(), |
| 134 | }); |
| 135 | } else if src.len() > hdr_size { |
| 136 | let mut slice_sizes = [0; 256]; |
| 137 | let mut slice_offs = [0; 256]; |
| 138 | |
| 139 | for (el, src) in slice_offs.iter_mut().zip(src[1..].chunks_exact(8)) { |
| 140 | *el = read_u32be(&src[4..]).unwrap() as usize; |
| 141 | } |
| 142 | for (dst, offs) in slice_sizes[..nslices - 1].iter_mut().zip(slice_offs.windows(2)) { |
| 143 | *dst = offs[1] - offs[0]; |
| 144 | } |
| 145 | slice_sizes[nslices - 1] = src.len() - hdr_size - slice_offs[nslices - 1]; |
| 146 | |
| 147 | let src = &src[hdr_size..]; |
| 148 | let full_size = src.len() as u32; |
| 149 | let npkt = nslices as u8; |
| 150 | for (pkt_no, (&offset, &size)) in slice_offs.iter().zip(slice_sizes.iter()).take(nslices).enumerate() { |
| 151 | let vtype = VideoDataType::Slice{pkt_no: (pkt_no + 1) as u8, npkt, full_size, offset: offset as u32}; |
| 152 | self.queue.push_back(VideoData { |
| 153 | vtype, |
| 154 | pts: self.mi_time, |
| 155 | seq_no: self.seq_no, |
| 156 | data: src[offset..][..size].to_vec(), |
| 157 | }); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | self.seq_no = self.seq_no.wrapping_add(1); |
| 162 | |
| 163 | true |
| 164 | } |
| 165 | fn get_packet(&mut self) -> Option<(Vec<u8>, u32, bool)> { |
| 166 | if self.queue.is_empty() { |
| 167 | return None; |
| 168 | } |
| 169 | let tot_size = self.queue.iter().fold(0usize, |acc, q| acc + q.get_pkt_len()); |
| 170 | if tot_size < self.pkt_size && !self.flush { |
| 171 | return None; |
| 172 | } |
| 173 | let mut pkt_buf = Vec::new(); |
| 174 | |
| 175 | let first = self.queue.pop_front().unwrap(); |
| 176 | let is_first = match first.vtype { |
| 177 | VideoDataType::Frame => true, |
| 178 | VideoDataType::Slice{pkt_no, npkt: _, full_size: _, offset: _} => pkt_no == 1, |
| 179 | }; |
| 180 | if self.queue.is_empty() || (first.get_pkt_len() + self.queue[0].get_pkt_len() + 4 > self.pkt_size) { |
| 181 | match first.vtype { |
| 182 | VideoDataType::Frame => { |
| 183 | pkt_buf.push(0x40); // 0x1 = whole frame |
| 184 | pkt_buf.push(first.seq_no); |
| 185 | pkt_buf.extend_from_slice(&first.data); |
| 186 | }, |
| 187 | VideoDataType::Slice{pkt_no, npkt, full_size: _, offset: _} => { |
| 188 | let id = if pkt_no == npkt { 2 } else { 0 }; |
| 189 | write_slice(&mut pkt_buf, id, &first); |
| 190 | }, |
| 191 | }; |
| 192 | } else { |
| 193 | let second = &self.queue[0]; |
| 194 | match (first.vtype.is_frame(), second.vtype.is_frame()) { |
| 195 | (true, true) => { |
| 196 | write_multiple_frame(&mut pkt_buf, &first); |
| 197 | while !self.queue.is_empty() && self.queue[0].vtype.is_frame() && (pkt_buf.len() + self.queue[0].get_pkt_len() < self.pkt_size) { |
| 198 | let frm = self.queue.pop_front().unwrap(); |
| 199 | write_multiple_frame(&mut pkt_buf, &frm); |
| 200 | } |
| 201 | }, |
| 202 | (true, false) => { |
| 203 | pkt_buf.push(0x40); // 0x1 = whole frame |
| 204 | pkt_buf.push(first.seq_no); |
| 205 | pkt_buf.extend_from_slice(&first.data); |
| 206 | }, |
| 207 | (false, true) => { |
| 208 | write_slice(&mut pkt_buf, 2, &first); |
| 209 | while !self.queue.is_empty() && self.queue[0].vtype.is_frame() && (pkt_buf.len() + self.queue[0].get_pkt_len() < self.pkt_size) { |
| 210 | let frm = self.queue.pop_front().unwrap(); |
| 211 | write_multiple_frame(&mut pkt_buf, &frm); |
| 212 | } |
| 213 | }, |
| 214 | (false, false) => { |
| 215 | if let VideoDataType::Slice{pkt_no, npkt, full_size: _, offset: _} = first.vtype { |
| 216 | let id = if pkt_no == npkt { 2 } else { 0 }; |
| 217 | write_slice(&mut pkt_buf, id, &first); |
| 218 | } else { |
| 219 | unreachable!() |
| 220 | } |
| 221 | }, |
| 222 | }; |
| 223 | } |
| 224 | Some((pkt_buf, first.pts, is_first)) |
| 225 | } |
| 226 | fn flush(&mut self) { |
| 227 | self.flush = true; |
| 228 | } |
| 229 | fn finish(&mut self, _bw: &mut ByteWriter) -> MuxerResult<()> { |
| 230 | Ok(()) |
| 231 | } |
| 232 | fn set_pkt_size(&mut self, pkt_size: usize) { |
| 233 | self.pkt_size = pkt_size; |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | fn write_16_or_32(dst: &mut Vec<u8>, val: u32) { |
| 238 | if val < (1 << 14) { |
| 239 | dst.push((1 << 6) | ((val >> 8) as u8)); |
| 240 | dst.push(val as u8); |
| 241 | } else { |
| 242 | dst.push((val >> 24) as u8); |
| 243 | dst.push((val >> 16) as u8); |
| 244 | dst.push((val >> 8) as u8); |
| 245 | dst.push( val as u8); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | fn write_multiple_frame(dst: &mut Vec<u8>, frm: &VideoData) { |
| 250 | dst.push(0xC0); // 0x3 = multiple frame |
| 251 | write_16_or_32(dst, frm.data.len() as u32); |
| 252 | write_16_or_32(dst, frm.pts); |
| 253 | dst.push(frm.seq_no); |
| 254 | dst.extend_from_slice(&frm.data); |
| 255 | } |
| 256 | |
| 257 | fn write_slice(dst: &mut Vec<u8>, id: u8, src: &VideoData) { |
| 258 | if let VideoDataType::Slice{pkt_no, npkt, full_size, offset} = src.vtype { |
| 259 | dst.push((id << 6) | (npkt >> 1)); |
| 260 | dst.push((npkt << 7) | pkt_no); |
| 261 | write_16_or_32(dst, full_size); |
| 262 | if id == 0 { |
| 263 | write_16_or_32(dst, offset); |
| 264 | } else { |
| 265 | write_16_or_32(dst, src.data.len() as u32); |
| 266 | } |
| 267 | dst.push(src.seq_no); |
| 268 | dst.extend_from_slice(&src.data); |
| 269 | } else { |
| 270 | unreachable!() |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | pub fn create_video_stream(stream: &NAStream, pkt_size: usize) -> MuxerResult<Box<dyn RMStreamWriter>> { |
| 275 | let info = stream.get_info(); |
| 276 | let cname = info.get_name(); |
| 277 | |
| 278 | for &(fcc, name) in VIDEO_CODEC_REGISTRY.iter() { |
| 279 | if name == cname { |
| 280 | return Ok(Box::new(VideoStreamWriter { |
| 281 | fcc: *fcc, |
| 282 | seq_no: 0, |
| 283 | time: 0, |
| 284 | mi_time: 0, |
| 285 | pkt_size, |
| 286 | queue: VecDeque::new(), |
| 287 | flush: false, |
| 288 | })); |
| 289 | } |
| 290 | } |
| 291 | Err(MuxerError::UnsupportedFormat) |
| 292 | } |