| 1 | use nihav_core::demuxers::*; |
| 2 | |
| 3 | struct IVFDemuxer<'a> { |
| 4 | src: &'a mut ByteReader<'a>, |
| 5 | nframes: u32, |
| 6 | frameno: u32, |
| 7 | } |
| 8 | |
| 9 | impl<'a> IVFDemuxer<'a> { |
| 10 | fn new(src: &'a mut ByteReader<'a>) -> Self { |
| 11 | IVFDemuxer { |
| 12 | src, |
| 13 | nframes: 0, |
| 14 | frameno: 0, |
| 15 | } |
| 16 | } |
| 17 | } |
| 18 | |
| 19 | impl<'a> DemuxCore<'a> for IVFDemuxer<'a> { |
| 20 | fn open(&mut self, strmgr: &mut StreamManager, _seek_index: &mut SeekIndex) -> DemuxerResult<()> { |
| 21 | let tag = self.src.read_tag()?; |
| 22 | validate!(&tag == b"DKIF"); |
| 23 | let ver = self.src.read_u16le()?; |
| 24 | validate!(ver == 0); |
| 25 | let hdr_len = self.src.read_u16le()? as usize; |
| 26 | validate!(hdr_len >= 32); |
| 27 | let fcc = self.src.read_tag()?; |
| 28 | let codec_name = match &fcc { |
| 29 | b"VP80" => "vp8", |
| 30 | _ => "unknown", |
| 31 | }; |
| 32 | let width = self.src.read_u16le()? as usize; |
| 33 | let height = self.src.read_u16le()? as usize; |
| 34 | validate!(width > 0 && height > 0); |
| 35 | let tb_den = self.src.read_u32le()?; |
| 36 | let tb_num = self.src.read_u32le()?; |
| 37 | self.nframes = self.src.read_u32le()?; |
| 38 | self.frameno = 0; |
| 39 | |
| 40 | self.src.seek(SeekFrom::Start(hdr_len as u64))?; |
| 41 | |
| 42 | let vci = NACodecTypeInfo::Video(NAVideoInfo::new(width, height, false, YUV420_FORMAT)); |
| 43 | let vinfo = NACodecInfo::new(codec_name, vci, None); |
| 44 | if strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, tb_num, tb_den, u64::from(self.nframes))).is_none() { |
| 45 | return Err(DemuxerError::MemoryError); |
| 46 | } |
| 47 | |
| 48 | Ok(()) |
| 49 | } |
| 50 | |
| 51 | fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> { |
| 52 | while self.frameno < self.nframes { |
| 53 | let fsize = self.src.read_u32le()? as usize; |
| 54 | let tstamp = self.src.read_u64le()?; |
| 55 | self.frameno += 1; |
| 56 | |
| 57 | if fsize == 0 { |
| 58 | continue; |
| 59 | } |
| 60 | |
| 61 | if let Some(stream) = strmgr.get_stream(0) { |
| 62 | let (tb_num, tb_den) = stream.get_timebase(); |
| 63 | let ts = NATimeInfo::new(Some(tstamp), None, None, tb_num, tb_den); |
| 64 | return self.src.read_packet(stream, ts, false, fsize); |
| 65 | } else { |
| 66 | return Err(DemuxerError::InvalidData); |
| 67 | } |
| 68 | } |
| 69 | Err(DemuxerError::EOF) |
| 70 | } |
| 71 | |
| 72 | fn seek(&mut self, _time: NATimePoint, _seek_index: &SeekIndex) -> DemuxerResult<()> { |
| 73 | Err(DemuxerError::NotPossible) |
| 74 | } |
| 75 | fn get_duration(&self) -> u64 { 0 } |
| 76 | } |
| 77 | |
| 78 | impl<'a> NAOptionHandler for IVFDemuxer<'a> { |
| 79 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } |
| 80 | fn set_options(&mut self, _options: &[NAOption]) { } |
| 81 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } |
| 82 | } |
| 83 | |
| 84 | pub struct IVFDemuxerCreator { } |
| 85 | |
| 86 | impl DemuxerCreator for IVFDemuxerCreator { |
| 87 | fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> { |
| 88 | Box::new(IVFDemuxer::new(br)) |
| 89 | } |
| 90 | fn get_name(&self) -> &'static str { "ivf" } |
| 91 | } |
| 92 | |
| 93 | #[cfg(test)] |
| 94 | mod test { |
| 95 | use super::*; |
| 96 | use std::fs::File; |
| 97 | |
| 98 | #[test] |
| 99 | fn test_ivf_demux() { |
| 100 | // sample is from the official VP8 test bitstream set |
| 101 | let mut file = File::open("assets/Duck/VP8/vp80-00-comprehensive-001.ivf").unwrap(); |
| 102 | let mut fr = FileReader::new_read(&mut file); |
| 103 | let mut br = ByteReader::new(&mut fr); |
| 104 | let mut dmx = IVFDemuxer::new(&mut br); |
| 105 | let mut sm = StreamManager::new(); |
| 106 | let mut si = SeekIndex::new(); |
| 107 | dmx.open(&mut sm, &mut si).unwrap(); |
| 108 | |
| 109 | loop { |
| 110 | let pktres = dmx.get_frame(&mut sm); |
| 111 | if let Err(e) = pktres { |
| 112 | if e == DemuxerError::EOF { break; } |
| 113 | panic!("error"); |
| 114 | } |
| 115 | let pkt = pktres.unwrap(); |
| 116 | println!("Got {}", pkt); |
| 117 | } |
| 118 | } |
| 119 | } |