nihav-game/src/demuxers/vmd.rs

   1 use nihav_core::frame::*;
   2 use nihav_core::demuxers::*;
   3 use std::io::SeekFrom;
   4
   5 const HEADER_SIZE: usize = 0x330;
   6 const FRAME_HDR_SIZE: usize = 10;
   7
   8 const CHTYPE_VIDEO: u8 = 0x02;
   9 const CHTYPE_AUDIO: u8 = 0x01;
  10
  11 #[derive(Clone,Copy)]
  12 struct FrameRec {
  13     chtype:     u8,
  14     size:       u32,
  15     off:        u32,
  16     hdr:        [u8; FRAME_HDR_SIZE],
  17     ts:         u32,
  18 }
  19
  20 struct VMDDemuxer<'a> {
  21     src:        &'a mut ByteReader<'a>,
  22     vid_id:     usize,
  23     aud_id:     usize,
  24     fno:        usize,
  25     is_indeo:   bool,
  26     frames:     Vec<FrameRec>,
  27 }
  28
  29 impl<'a> DemuxCore<'a> for VMDDemuxer<'a> {
  30     #[allow(unused_variables)]
  31     fn open(&mut self, strmgr: &mut StreamManager, _seek_index: &mut SeekIndex) -> DemuxerResult<()> {
  32         let src = &mut self.src;
  33
  34         let mut header: [u8; HEADER_SIZE] = [0; HEADER_SIZE];
  35                                                 src.read_buf(&mut header)?;
  36
  37         let mut width  = read_u16le(&header[12..])? as usize;
  38         let mut height = read_u16le(&header[14..])? as usize;
  39         self.is_indeo = &header[24..27] == b"iv3";
  40         if self.is_indeo && width > 320 {
  41             width  >>= 1;
  42             height >>= 1;
  43         }
  44
  45         let nframes = read_u16le(&header[6..])? as usize;
  46         let fpb     = read_u16le(&header[18..])? as usize;
  47         validate!(nframes > 0 && fpb > 0);
  48
  49         let mut edata: Vec<u8> = Vec::with_capacity(HEADER_SIZE);
  50         edata.extend_from_slice(&header);
  51         let vhdr = NAVideoInfo::new(width, height, false, PAL8_FORMAT);
  52         let vci = NACodecTypeInfo::Video(vhdr);
  53         let vinfo = NACodecInfo::new(if !self.is_indeo { "vmd-video" } else { "indeo3" }, vci, Some(edata));
  54         self.vid_id = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 1, 12)).unwrap();
  55
  56         let srate = u32::from(read_u16le(&header[804..])?);
  57         let block_size;
  58         if srate > 0 {
  59             let bsize = read_u16le(&header[806..])? as usize;
  60             let channels = if (header[811] & 0x8F) != 0 { 2 } else { 1 };
  61             let is16bit;
  62             if (bsize & 0x8000) != 0 {
  63                 is16bit = true;
  64                 block_size = 0x10000 - bsize;
  65             } else {
  66                 is16bit = false;
  67                 block_size = bsize;
  68             }
  69
  70             let ahdr = NAAudioInfo::new(srate, channels, if is16bit { SND_S16P_FORMAT } else { SND_U8_FORMAT }, block_size);
  71             let ainfo = NACodecInfo::new("vmd-audio", NACodecTypeInfo::Audio(ahdr), None);
  72             self.aud_id = strmgr.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, 1, srate)).unwrap();
  73         } else {
  74             block_size = 0;
  75         }
  76
  77         let adelay  = u32::from(read_u16le(&header[808..])?);
  78         let idx_off = u64::from(read_u32le(&header[812..])?);
  79                                                 src.seek(SeekFrom::Start(idx_off))?;
  80         let mut offs: Vec<u32> = Vec::with_capacity(nframes);
  81         for i in 0..nframes {
  82             let _flags                          = src.read_u16le()?;
  83             let off                             = src.read_u32le()?;
  84             offs.push(off);
  85         }
  86         self.frames.reserve(nframes * fpb);
  87         let mut ats = adelay;
  88         for i in 0..nframes {
  89             let mut off = offs[i];
  90             for _ in 0..fpb {
  91                 let chtype                      = src.read_byte()?;
  92                                                   src.read_skip(1)?;
  93                 let mut size                    = src.read_u32le()?;
  94                 let mut hdr: [u8; FRAME_HDR_SIZE] = [0; FRAME_HDR_SIZE];
  95                                                   src.read_buf(&mut hdr)?;
  96                 if (i == 0) && (chtype == CHTYPE_AUDIO) && (size > 4) && ((size as usize) < block_size/2) {
  97                     size += 0x10000;
  98                 }
  99                 if (chtype == CHTYPE_VIDEO || chtype == CHTYPE_AUDIO) && (size > 0) {
 100                     let ts = if (i == 0) || (chtype != CHTYPE_AUDIO) {
 101                             i as u32
 102                         } else {
 103                             ats
 104                         };
 105                     self.frames.push(FrameRec { chtype, size, hdr, off, ts });
 106                 }
 107                 if i > 0 && chtype == CHTYPE_AUDIO {
 108                     ats += 1;
 109                 }
 110                 if chtype != 0 {
 111                     validate!(off.checked_add(size).is_some());
 112                     off += size;
 113                 }
 114             }
 115         }
 116
 117         self.fno = 0;
 118         Ok(())
 119     }
 120
 121     fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
 122         if self.fno >= self.frames.len() { return Err(DemuxerError::EOF); }
 123         let cur_frame = &self.frames[self.fno];
 124 //println!("fno {} -> type {} size {} @ {:X} ts {}", self.fno, cur_frame.chtype, cur_frame.size, cur_frame.off, cur_frame.ts);
 125         let next_pos = u64::from(cur_frame.off);
 126         if self.src.tell() != next_pos {
 127             self.src.seek(SeekFrom::Start(next_pos))?;
 128         }
 129
 130         let is_video = cur_frame.chtype == CHTYPE_VIDEO;
 131         let mut buf: Vec<u8> = Vec::with_capacity(FRAME_HDR_SIZE + (cur_frame.size as usize));
 132         if !self.is_indeo || !is_video {
 133             buf.extend_from_slice(&cur_frame.hdr);
 134             buf.resize(FRAME_HDR_SIZE + (cur_frame.size as usize), 0);
 135             self.src.read_buf(&mut buf[FRAME_HDR_SIZE..])?;
 136         } else {
 137             buf.resize(cur_frame.size as usize, 0);
 138             self.src.read_buf(&mut buf)?;
 139         }
 140
 141         self.fno += 1;
 142
 143         let str_id = if is_video { self.vid_id } else { self.aud_id };
 144         let str = strmgr.get_stream(str_id).unwrap();
 145         let (tb_num, tb_den) = str.get_timebase();
 146         let ts = NATimeInfo::new(Some(u64::from(cur_frame.ts)), None, None, tb_num, tb_den);
 147         let pkt = NAPacket::new(str, ts, false, buf);
 148
 149         Ok(pkt)
 150     }
 151
 152     fn seek(&mut self, _time: u64, _seek_index: &SeekIndex) -> DemuxerResult<()> {
 153         Err(DemuxerError::NotPossible)
 154     }
 155 }
 156
 157 impl<'a> VMDDemuxer<'a> {
 158     fn new(io: &'a mut ByteReader<'a>) -> Self {
 159         Self {
 160             src:        io,
 161             vid_id:     0,
 162             aud_id:     0,
 163             fno:        0,
 164             is_indeo:   false,
 165             frames:     Vec::new(),
 166         }
 167     }
 168 }
 169
 170 pub struct VMDDemuxerCreator { }
 171
 172 impl DemuxerCreator for VMDDemuxerCreator {
 173     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
 174         Box::new(VMDDemuxer::new(br))
 175     }
 176     fn get_name(&self) -> &'static str { "vmd" }
 177 }
 178
 179 #[cfg(test)]
 180 mod test {
 181     use super::*;
 182     use std::fs::File;
 183
 184     #[test]
 185     fn test_vmd_demux() {
 186         let mut file = File::open("assets/Game/128.vmd").unwrap();
 187         //let mut file = File::open("assets/Game/1491.VMD").unwrap();
 188         let mut fr = FileReader::new_read(&mut file);
 189         let mut br = ByteReader::new(&mut fr);
 190         let mut dmx = VMDDemuxer::new(&mut br);
 191         let mut sm = StreamManager::new();
 192         dmx.open(&mut sm).unwrap();
 193         loop {
 194             let pktres = dmx.get_frame(&mut sm);
 195             if let Err(e) = pktres {
 196                 if (e as i32) == (DemuxerError::EOF as i32) { break; }
 197                 panic!("error");
 198             }
 199             let pkt = pktres.unwrap();
 200             println!("Got {}", pkt);
 201         }
 202     }
 203 }