4 //use std::collections::HashMap;
12 pub struct GremlinVideoDemuxer<'a> {
14 src: &'a mut ByteReader<'a>,
15 streams: Vec<Rc<NAStream<'a>>>,
24 impl<'a> NADemuxer<'a> for GremlinVideoDemuxer<'a> {
25 #[allow(unused_variables)]
26 fn open(&mut self) -> DemuxerResult<()> {
27 let src = &mut self.src;
28 let magic = src.read_u32le()?;
29 if magic != 0x29111994 { return Err(DemuxerError::InvalidData); }
30 let id = src.read_u16le()?;
31 let frames = src.read_u16le()?;
32 let fps = src.read_u16le()?;
33 let aflags = src.read_u16le()?;
34 let rate = src.read_u16le()?;
35 let depth = src.read_u16le()?;
36 let max_fs = src.read_u16le()?;
38 let width = src.read_u16le()?;
39 let height = src.read_u16le()?;
40 println!("id {} frames {} fps {} sound {} Hz {:X} img {} - {}x{}",id,frames,fps,rate,aflags,depth,width,height);
42 let vhdr = NAVideoInfo::new(width as u32, height as u32, false, PAL8_FORMAT);
43 let vci = NACodecTypeInfo::Video(vhdr);
44 let vinfo = NACodecInfo::new(vci, None);
45 let vstr = NAStream::new(StreamType::Video, 0, vinfo);
46 self.streams.push(Rc::new(vstr));
48 if (aflags & 1) != 0 {
49 let channels = if (aflags & 2) != 0 { 2 } else { 1 };
50 let ahdr = NAAudioInfo::new(rate as u32, channels as u8, if (aflags & 4) != 0 { SND_S16_FORMAT } else { SND_U8_FORMAT }, 2);
51 let ainfo = NACodecInfo::new(NACodecTypeInfo::Audio(ahdr), None);
52 let astr = NAStream::new(StreamType::Audio, 1, ainfo);
53 self.streams.push(Rc::new(astr));
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;
58 println!("audio chunk size {}({:X})",self.asize,self.asize);
60 if max_fs > 0 && depth == 1 {
65 self.state = GDVState::NewFrame;
69 #[allow(unused_variables)]
70 fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
71 if !self.opened { return Err(DemuxerError::NoSuchInput); }
72 if self.cur_frame >= self.frames { return Err(DemuxerError::EOF); }
74 GDVState::NewFrame if self.asize > 0 => { self.read_achunk() }
75 _ => { self.read_vchunk() }
79 #[allow(unused_variables)]
80 fn seek(&mut self, time: u64) -> DemuxerResult<()> {
81 if !self.opened { return Err(DemuxerError::NoSuchInput); }
82 Err(DemuxerError::NotImplemented)
85 /*impl<'a> Drop for GremlinVideoDemuxer<'a> {
86 #[allow(unused_variables)]
90 impl<'a> GremlinVideoDemuxer<'a> {
91 pub fn new(io: &'a mut ByteReader<'a>) -> Self {
98 state: GDVState::NewFrame,
105 fn find_stream(&mut self, id: u32) -> Rc<NAStream<'a>> {
106 for i in 0..self.streams.len() {
107 if self.streams[i].get_id() == id {
108 return self.streams[i].clone();
111 panic!("stream not found");
113 fn read_achunk(&mut self) -> DemuxerResult<NAPacket> {
114 self.state = GDVState::AudioRead;
115 let str = self.find_stream(1);
116 self.src.read_packet(str, Some(self.cur_frame as u64), None, None, true, self.asize)
119 fn read_vchunk(&mut self) -> DemuxerResult<NAPacket> {
120 let str = self.find_stream(0);
121 let mut src = &mut self.src;
122 let magic = src.read_u16be()?;
123 if magic != 0x0513 { return Err(DemuxerError::InvalidData); }
124 let size = (src.read_u16le()? as usize) + 4;
125 let tmp = src.peek_u32le()?;
126 let flags = (tmp & 0xFF) as usize;
127 self.state = GDVState::NewFrame;
128 self.cur_frame = self.cur_frame + 1;
129 src.read_packet(str, Some((self.cur_frame - 1) as u64), None, None, if (flags & 64) != 0 { true } else { false }, size)
139 fn test_gdv_demux() {
140 let mut file = File::open("assets/intro1.gdv").unwrap();
141 let mut fr = FileReader::new_read(&mut file);
142 let mut br = ByteReader::new(&mut fr);
143 let mut dmx = GremlinVideoDemuxer::new(&mut br);
146 let pktres = dmx.get_frame();
147 if let Err(e) = pktres {
148 if (e as i32) == (DemuxerError::EOF as i32) { break; }
151 let pkt = pktres.unwrap();
152 println!("Got {}", pkt);