| 1 | use nihav_core::frame::*; |
| 2 | use nihav_core::io::byteio::*; |
| 3 | use nihav_core::demuxers::*; |
| 4 | use nihav_core::formats::YUV420_FORMAT; |
| 5 | |
| 6 | struct RawH264Demuxer<'a> { |
| 7 | src: &'a mut ByteReader<'a>, |
| 8 | cur_frame: u64, |
| 9 | frame_buf: Vec<u8>, |
| 10 | } |
| 11 | |
| 12 | fn read_nal(src: &mut ByteReader, dst: &mut Vec<u8>) -> DemuxerResult<()> { |
| 13 | dst.clear(); |
| 14 | loop { |
| 15 | let b = src.read_byte()?; |
| 16 | if b == 0 { |
| 17 | let b2 = src.read_byte()?; |
| 18 | if b2 == 0 { |
| 19 | let b3 = src.read_byte()?; |
| 20 | if b3 == 0 { |
| 21 | while src.read_byte()? != 1 { } |
| 22 | break; |
| 23 | } else if b3 == 1 { |
| 24 | break; |
| 25 | } else { |
| 26 | dst.push(b); |
| 27 | dst.push(b2); |
| 28 | dst.push(b3); |
| 29 | } |
| 30 | } else { |
| 31 | dst.push(b); |
| 32 | dst.push(b2); |
| 33 | } |
| 34 | } else { |
| 35 | dst.push(b); |
| 36 | } |
| 37 | } |
| 38 | Ok(()) |
| 39 | } |
| 40 | |
| 41 | fn put_nal(dst: &mut Vec<u8>, src: &[u8]) { |
| 42 | let len = src.len(); |
| 43 | dst.push((len >> 24) as u8); |
| 44 | dst.push((len >> 16) as u8); |
| 45 | dst.push((len >> 8) as u8); |
| 46 | dst.push( len as u8); |
| 47 | dst.extend_from_slice(src); |
| 48 | } |
| 49 | |
| 50 | impl<'a> DemuxCore<'a> for RawH264Demuxer<'a> { |
| 51 | #[allow(clippy::unreadable_literal)] |
| 52 | fn open(&mut self, strmgr: &mut StreamManager, _seek_idx: &mut SeekIndex) -> DemuxerResult<()> { |
| 53 | let src = &mut self.src; |
| 54 | |
| 55 | while src.read_byte()? != 1 { } |
| 56 | |
| 57 | let mut edata: Vec<u8> = Vec::with_capacity(64); |
| 58 | let mut num_sps = 0; |
| 59 | let mut sps_buf = Vec::new(); |
| 60 | let mut num_pps = 0; |
| 61 | let mut pps_buf = Vec::new(); |
| 62 | let mut profile = 0; |
| 63 | let mut level = 0; |
| 64 | |
| 65 | let mut nal_buf = Vec::with_capacity(65536); |
| 66 | loop { |
| 67 | read_nal(src, &mut nal_buf)?; |
| 68 | if !nal_buf.is_empty() { |
| 69 | let nal_type = nal_buf[0] & 0x1F; |
| 70 | match nal_type { |
| 71 | 7 => { |
| 72 | if nal_buf.len() < 4 { |
| 73 | return Err(DemuxerError::InvalidData); |
| 74 | } |
| 75 | profile = nal_buf[1]; |
| 76 | level = nal_buf[3]; |
| 77 | sps_buf.push((nal_buf.len() >> 8) as u8); |
| 78 | sps_buf.push(nal_buf.len() as u8); |
| 79 | sps_buf.extend_from_slice(&nal_buf); |
| 80 | num_sps += 1; |
| 81 | }, |
| 82 | 8 => { |
| 83 | pps_buf.push((nal_buf.len() >> 8) as u8); |
| 84 | pps_buf.push(nal_buf.len() as u8); |
| 85 | pps_buf.extend_from_slice(&nal_buf); |
| 86 | num_pps += 1; |
| 87 | }, |
| 88 | 1 | 5 => { |
| 89 | self.frame_buf = nal_buf; |
| 90 | break; |
| 91 | }, |
| 92 | _ => {}, |
| 93 | }; |
| 94 | } |
| 95 | } |
| 96 | if num_sps == 0 || num_pps == 0 { |
| 97 | return Err(DemuxerError::InvalidData); |
| 98 | } |
| 99 | edata.extend_from_slice(b"avcC"); |
| 100 | edata.push(1); |
| 101 | edata.push(profile); |
| 102 | edata.push(0); |
| 103 | edata.push(level); |
| 104 | edata.push(0xFF); |
| 105 | edata.push(0xE0 | num_sps); |
| 106 | edata.extend_from_slice(&sps_buf); |
| 107 | edata.push(num_pps); |
| 108 | edata.extend_from_slice(&pps_buf); |
| 109 | |
| 110 | let width = 16; |
| 111 | let height = 16; |
| 112 | |
| 113 | let vhdr = NAVideoInfo::new(width, height, false, YUV420_FORMAT); |
| 114 | let vinfo = NACodecInfo::new("h264", NACodecTypeInfo::Video(vhdr), Some(edata)); |
| 115 | if let None = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 1, 25, 0)) { |
| 116 | return Err(DemuxerError::InvalidData); |
| 117 | } |
| 118 | self.cur_frame = 0; |
| 119 | |
| 120 | Ok(()) |
| 121 | } |
| 122 | fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> { |
| 123 | let ts = NATimeInfo::new(Some(self.cur_frame), None, None, 1, 25); |
| 124 | let mut buf: Vec<u8> = Vec::with_capacity(65536); |
| 125 | if !self.frame_buf.is_empty() { |
| 126 | put_nal(&mut buf, &self.frame_buf); |
| 127 | self.frame_buf.clear(); |
| 128 | } |
| 129 | let strres = strmgr.get_stream(0); |
| 130 | if strres.is_none() { |
| 131 | return Err(DemuxerError::InvalidData); |
| 132 | } |
| 133 | let stream = strres.unwrap(); |
| 134 | |
| 135 | let mut keyframe = false; |
| 136 | |
| 137 | let mut nal_buf = Vec::with_capacity(65536); |
| 138 | let mut is_eof = false; |
| 139 | while !is_eof { |
| 140 | match read_nal(&mut self.src, &mut nal_buf) { |
| 141 | Ok(()) => {}, |
| 142 | Err(DemuxerError::IOError) => { is_eof = true; }, |
| 143 | Err(err) => return Err(err), |
| 144 | }; |
| 145 | if !nal_buf.is_empty() { |
| 146 | let nal_type = nal_buf[0] & 0x1F; |
| 147 | keyframe = nal_type == 5; |
| 148 | match nal_type { |
| 149 | 1 | 5 => { |
| 150 | let first_slice = (nal_buf[1] & 0x80) != 0; |
| 151 | if first_slice && !buf.is_empty() { |
| 152 | self.frame_buf.extend_from_slice(&nal_buf); |
| 153 | break; |
| 154 | } else { |
| 155 | put_nal(&mut buf, &nal_buf); |
| 156 | } |
| 157 | }, |
| 158 | _ => { |
| 159 | //println!("non-slice NAL {} @ {:X}", nal_type, self.src.tell()); |
| 160 | put_nal(&mut buf, &nal_buf); |
| 161 | }, |
| 162 | }; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | if is_eof && buf.is_empty() { |
| 167 | return Err(DemuxerError::EOF); |
| 168 | } |
| 169 | |
| 170 | let pkt = NAPacket::new(stream, ts, keyframe, buf); |
| 171 | |
| 172 | self.cur_frame += 1; |
| 173 | |
| 174 | Ok(pkt) |
| 175 | } |
| 176 | fn seek(&mut self, _time: NATimePoint, _seek_idx: &SeekIndex) -> DemuxerResult<()> { |
| 177 | Err(DemuxerError::NotImplemented) |
| 178 | } |
| 179 | fn get_duration(&self) -> u64 { 0 } |
| 180 | } |
| 181 | |
| 182 | impl<'a> NAOptionHandler for RawH264Demuxer<'a> { |
| 183 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } |
| 184 | fn set_options(&mut self, _options: &[NAOption]) { } |
| 185 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } |
| 186 | } |
| 187 | |
| 188 | impl<'a> RawH264Demuxer<'a> { |
| 189 | fn new(io: &'a mut ByteReader<'a>) -> Self { |
| 190 | RawH264Demuxer { |
| 191 | src: io, |
| 192 | cur_frame: 0, |
| 193 | frame_buf: Vec::new(), |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | pub struct RawH264DemuxerCreator { } |
| 199 | |
| 200 | impl DemuxerCreator for RawH264DemuxerCreator { |
| 201 | fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> { |
| 202 | Box::new(RawH264Demuxer::new(br)) |
| 203 | } |
| 204 | fn get_name(&self) -> &'static str { "rawh264" } |
| 205 | } |
| 206 | |