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1 | use super::*; | |
2 | use io::byteio::*; | |
3 | use frame::*; | |
4 | //use std::collections::HashMap; | |
5 | ||
6 | enum GDVState { | |
7 | NewFrame, | |
8 | AudioRead, | |
9 | } | |
10 | ||
11 | #[allow(dead_code)] | |
12 | pub struct GremlinVideoDemuxer<'a> { | |
13 | opened: bool, | |
14 | src: &'a mut ByteReader<'a>, | |
15 | streams: Vec<Rc<NAStream>>, | |
16 | frames: u16, | |
17 | cur_frame: u16, | |
18 | asize: usize, | |
19 | apacked: bool, | |
20 | state: GDVState, | |
21 | pktdta: Vec<u8>, | |
22 | } | |
23 | ||
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()?; | |
37 | src.read_skip(2)?; | |
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); | |
41 | if max_fs > 0 { | |
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)); | |
47 | } | |
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)); | |
54 | ||
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); | |
59 | } | |
60 | if max_fs > 0 && depth == 1 { | |
61 | src.read_skip(768)?; | |
62 | } | |
63 | self.frames = frames; | |
64 | self.opened = true; | |
65 | self.state = GDVState::NewFrame; | |
66 | Ok(()) | |
67 | } | |
68 | ||
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); } | |
73 | match self.state { | |
74 | GDVState::NewFrame if self.asize > 0 => { self.read_achunk() } | |
75 | _ => { self.read_vchunk() } | |
76 | } | |
77 | } | |
78 | ||
79 | #[allow(unused_variables)] | |
80 | fn seek(&mut self, time: u64) -> DemuxerResult<()> { | |
81 | if !self.opened { return Err(DemuxerError::NoSuchInput); } | |
82 | Err(DemuxerError::NotImplemented) | |
83 | } | |
84 | } | |
85 | /*impl<'a> Drop for GremlinVideoDemuxer<'a> { | |
86 | #[allow(unused_variables)] | |
87 | fn drop(&mut self) { | |
88 | } | |
89 | }*/ | |
90 | impl<'a> GremlinVideoDemuxer<'a> { | |
91 | pub fn new(io: &'a mut ByteReader<'a>) -> Self { | |
92 | GremlinVideoDemuxer { | |
93 | cur_frame: 0, | |
94 | frames: 0, | |
95 | opened: false, | |
96 | asize: 0, | |
97 | apacked: false, | |
98 | state: GDVState::NewFrame, | |
99 | pktdta: Vec::new(), | |
100 | src: io, | |
101 | streams: Vec::new() | |
102 | } | |
103 | } | |
104 | ||
105 | fn find_stream(&mut self, id: u32) -> Rc<NAStream> { | |
106 | for i in 0..self.streams.len() { | |
107 | if self.streams[i].get_id() == id { | |
108 | return self.streams[i].clone(); | |
109 | } | |
110 | } | |
111 | panic!("stream not found"); | |
112 | } | |
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) | |
117 | } | |
118 | ||
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) | |
130 | } | |
131 | } | |
132 | ||
133 | #[cfg(test)] | |
134 | mod test { | |
135 | use super::*; | |
136 | use std::fs::File; | |
137 | ||
138 | #[test] | |
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); | |
144 | dmx.open().unwrap(); | |
145 | loop { | |
146 | let pktres = dmx.get_frame(); | |
147 | if let Err(e) = pktres { | |
148 | if (e as i32) == (DemuxerError::EOF as i32) { break; } | |
149 | panic!("error"); | |
150 | } | |
151 | let pkt = pktres.unwrap(); | |
152 | println!("Got {}", pkt); | |
153 | } | |
154 | } | |
155 | } |