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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/Game/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 | } |