| 1 | use nihav_core::frame::*; |
| 2 | use nihav_core::demuxers::*; |
| 3 | |
| 4 | struct BMVDemuxer<'a> { |
| 5 | src: &'a mut ByteReader<'a>, |
| 6 | vid_id: usize, |
| 7 | aud_id: usize, |
| 8 | vpos: u64, |
| 9 | apos: u64, |
| 10 | pkt_buf: Vec<NAPacket>, |
| 11 | } |
| 12 | |
| 13 | impl<'a> DemuxCore<'a> for BMVDemuxer<'a> { |
| 14 | #[allow(unused_variables)] |
| 15 | fn open(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<()> { |
| 16 | let src = &mut self.src; |
| 17 | |
| 18 | let vhdr = NAVideoInfo::new(640, 429, false, PAL8_FORMAT); |
| 19 | let vci = NACodecTypeInfo::Video(vhdr); |
| 20 | let vinfo = NACodecInfo::new("bmv-video", vci, None); |
| 21 | self.vid_id = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 1, 12)).unwrap(); |
| 22 | |
| 23 | let ahdr = NAAudioInfo::new(22050, 2, SND_S16_FORMAT, 1); |
| 24 | let ainfo = NACodecInfo::new("bmv-audio", NACodecTypeInfo::Audio(ahdr), None); |
| 25 | self.aud_id = strmgr.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, 1, 22050)).unwrap(); |
| 26 | |
| 27 | self.vpos = 0; |
| 28 | self.apos = 0; |
| 29 | Ok(()) |
| 30 | } |
| 31 | |
| 32 | fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> { |
| 33 | if self.pkt_buf.len() > 0 { |
| 34 | return Ok(self.pkt_buf.pop().unwrap()); |
| 35 | } |
| 36 | |
| 37 | loop { |
| 38 | let ctype = self.src.read_byte()?; |
| 39 | if ctype == 0 { // NOP chunk |
| 40 | continue; |
| 41 | } |
| 42 | if ctype == 1 { return Err(DemuxerError::EOF); } |
| 43 | let size = self.src.read_u24le()? as usize; |
| 44 | validate!(size > 0); |
| 45 | let asize; |
| 46 | if (ctype & 0x20) != 0 { |
| 47 | let nblocks = self.src.peek_byte()?; |
| 48 | asize = (nblocks as usize) * 65 + 1; |
| 49 | validate!(asize < size); |
| 50 | let str = strmgr.get_stream(self.aud_id).unwrap(); |
| 51 | let (tb_num, tb_den) = str.get_timebase(); |
| 52 | let ts = NATimeInfo::new(Some(self.apos), None, None, tb_num, tb_den); |
| 53 | let apkt = self.src.read_packet(str, ts, false, asize)?; |
| 54 | self.apos += (nblocks as u64) * 32; |
| 55 | self.pkt_buf.push(apkt); |
| 56 | } else { |
| 57 | asize = 0; |
| 58 | } |
| 59 | let mut buf: Vec<u8> = Vec::with_capacity(size - asize + 1); |
| 60 | buf.resize(size - asize + 1, 0); |
| 61 | buf[0] = ctype; |
| 62 | self.src.read_buf(&mut buf[1..])?; |
| 63 | |
| 64 | let str = strmgr.get_stream(self.vid_id).unwrap(); |
| 65 | let (tb_num, tb_den) = str.get_timebase(); |
| 66 | let ts = NATimeInfo::new(Some(self.vpos), None, None, tb_num, tb_den); |
| 67 | let pkt = NAPacket::new(str, ts, (ctype & 3) == 3, buf); |
| 68 | |
| 69 | self.vpos += 1; |
| 70 | return Ok(pkt); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | #[allow(unused_variables)] |
| 75 | fn seek(&mut self, time: u64) -> DemuxerResult<()> { |
| 76 | Err(DemuxerError::NotImplemented) |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | impl<'a> BMVDemuxer<'a> { |
| 81 | fn new(io: &'a mut ByteReader<'a>) -> Self { |
| 82 | Self { |
| 83 | src: io, |
| 84 | vid_id: 0, |
| 85 | aud_id: 0, |
| 86 | vpos: 0, |
| 87 | apos: 0, |
| 88 | pkt_buf: Vec::with_capacity(1), |
| 89 | } |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | pub struct BMVDemuxerCreator { } |
| 94 | |
| 95 | impl DemuxerCreator for BMVDemuxerCreator { |
| 96 | fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<DemuxCore<'a> + 'a> { |
| 97 | Box::new(BMVDemuxer::new(br)) |
| 98 | } |
| 99 | fn get_name(&self) -> &'static str { "bmv" } |
| 100 | } |
| 101 | |
| 102 | #[cfg(test)] |
| 103 | mod test { |
| 104 | use super::*; |
| 105 | use std::fs::File; |
| 106 | |
| 107 | #[test] |
| 108 | fn test_bmv_demux() { |
| 109 | let mut file = File::open("assets/DW2-MOUSE.BMV").unwrap(); |
| 110 | let mut fr = FileReader::new_read(&mut file); |
| 111 | let mut br = ByteReader::new(&mut fr); |
| 112 | let mut dmx = BMVDemuxer::new(&mut br); |
| 113 | let mut sm = StreamManager::new(); |
| 114 | dmx.open(&mut sm).unwrap(); |
| 115 | loop { |
| 116 | let pktres = dmx.get_frame(&mut sm); |
| 117 | if let Err(e) = pktres { |
| 118 | if (e as i32) == (DemuxerError::EOF as i32) { break; } |
| 119 | panic!("error"); |
| 120 | } |
| 121 | let pkt = pktres.unwrap(); |
| 122 | println!("Got {}", pkt); |
| 123 | } |
| 124 | } |
| 125 | } |