| 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 | } |