5 //use std::collections::HashMap;
13 struct GremlinVideoDemuxer<'a> {
15 src: &'a mut ByteReader<'a>,
27 impl<'a> Demux<'a> for GremlinVideoDemuxer<'a> {
28 #[allow(unused_variables)]
29 fn open(&mut self) -> DemuxerResult<()> {
30 let src = &mut self.src;
31 let magic = src.read_u32le()?;
32 if magic != 0x29111994 { return Err(DemuxerError::InvalidData); }
33 let id = src.read_u16le()?;
34 let frames = src.read_u16le()?;
35 let fps = src.read_u16le()?;
36 let aflags = src.read_u16le()?;
37 let rate = src.read_u16le()?;
38 let depth = src.read_u16le()?;
39 let max_fs = src.read_u16le()?;
41 let width = src.read_u16le()?;
42 let height = src.read_u16le()?;
44 let vhdr = NAVideoInfo::new(width as usize, height as usize, false, PAL8_FORMAT);
45 let vci = NACodecTypeInfo::Video(vhdr);
46 let vinfo = NACodecInfo::new("gdv-video", vci, None);
47 self.v_id = self.dmx.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 1, fps as u32));
49 if (aflags & 1) != 0 {
50 let channels = if (aflags & 2) != 0 { 2 } else { 1 };
51 let ahdr = NAAudioInfo::new(rate as u32, channels as u8, if (aflags & 4) != 0 { SND_S16_FORMAT } else { SND_U8_FORMAT }, 2);
52 let ainfo = NACodecInfo::new("gdv-audio", NACodecTypeInfo::Audio(ahdr), None);
53 self.a_id = self.dmx.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, 1, rate as u32));
55 let packed = if (aflags & 8) != 0 { 1 } else { 0 };
56 self.asize = (((rate / fps) * channels * (if (aflags & 4) != 0 { 2 } else { 1 })) >> packed) as usize;
57 self.apacked = (aflags & 8) != 0;
59 if max_fs > 0 && depth == 1 {
64 self.state = GDVState::NewFrame;
68 #[allow(unused_variables)]
69 fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
70 if !self.opened { return Err(DemuxerError::NoSuchInput); }
71 if self.cur_frame >= self.frames { return Err(DemuxerError::EOF); }
73 GDVState::NewFrame if self.asize > 0 => { self.read_achunk() }
74 _ => { self.read_vchunk() }
78 fn get_num_streams(&self) -> usize { self.dmx.get_num_streams() }
79 fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>> { self.dmx.get_stream(idx) }
81 #[allow(unused_variables)]
82 fn seek(&mut self, time: u64) -> DemuxerResult<()> {
83 if !self.opened { return Err(DemuxerError::NoSuchInput); }
84 Err(DemuxerError::NotImplemented)
87 /*impl<'a> Drop for GremlinVideoDemuxer<'a> {
88 #[allow(unused_variables)]
92 impl<'a> GremlinVideoDemuxer<'a> {
93 fn new(io: &'a mut ByteReader<'a>) -> Self {
100 state: GDVState::NewFrame,
109 fn read_achunk(&mut self) -> DemuxerResult<NAPacket> {
110 self.state = GDVState::AudioRead;
111 let str = self.dmx.get_stream(self.a_id.unwrap()).unwrap();
112 let (tb_num, tb_den) = str.get_timebase();
113 let ts = NATimeInfo::new(Some(self.cur_frame as u64), None, None, tb_num, tb_den);
114 self.src.read_packet(str, ts, true, self.asize)
117 fn read_vchunk(&mut self) -> DemuxerResult<NAPacket> {
118 let str = self.dmx.get_stream(self.v_id.unwrap()).unwrap();
119 let mut src = &mut self.src;
120 let magic = src.read_u16be()?;
121 if magic != 0x0513 { return Err(DemuxerError::InvalidData); }
122 let size = (src.read_u16le()? as usize) + 4;
123 let tmp = src.peek_u32le()?;
124 let flags = (tmp & 0xFF) as usize;
125 self.state = GDVState::NewFrame;
126 self.cur_frame = self.cur_frame + 1;
127 let (tb_num, tb_den) = str.get_timebase();
128 let ts = NATimeInfo::new(Some((self.cur_frame - 1) as u64), None, None, tb_num, tb_den);
129 src.read_packet(str, ts, if (flags & 64) != 0 { true } else { false }, size)
133 pub struct GDVDemuxerCreator { }
135 impl DemuxerCreator for GDVDemuxerCreator {
136 fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<Demux<'a> + 'a> {
137 Box::new(GremlinVideoDemuxer::new(br))
139 fn get_name(&self) -> &'static str { "gdv" }
148 fn test_gdv_demux() {
149 let mut file = File::open("assets/intro1.gdv").unwrap();
150 let mut fr = FileReader::new_read(&mut file);
151 let mut br = ByteReader::new(&mut fr);
152 let mut dmx = GremlinVideoDemuxer::new(&mut br);
155 let pktres = dmx.get_frame();
156 if let Err(e) = pktres {
157 if (e as i32) == (DemuxerError::EOF as i32) { break; }
160 let pkt = pktres.unwrap();
161 println!("Got {}", pkt);