nihav-llaudio/src/demuxers/tta.rs

   1 use nihav_core::frame::*;
   2 use nihav_core::demuxers::*;
   3
   4 struct TTADemuxer<'a> {
   5     src:            &'a mut ByteReader<'a>,
   6     cur_frame:      u32,
   7     nframes:        u32,
   8     nsamples:       u32,
   9     offtab:         Vec<u64>,
  10     sizetab:        Vec<u32>,
  11     framelen:       u32,
  12 }
  13
  14 impl<'a> TTADemuxer<'a> {
  15     fn new(io: &'a mut ByteReader<'a>) -> Self {
  16         Self {
  17             src:            io,
  18             cur_frame:      0,
  19             nframes:        0,
  20             nsamples:       0,
  21             offtab:         Vec::new(),
  22             sizetab:        Vec::new(),
  23             framelen:       0,
  24         }
  25     }
  26 }
  27
  28 impl<'a> DemuxCore<'a> for TTADemuxer<'a> {
  29     fn open(&mut self, strmgr: &mut StreamManager, seek_index: &mut SeekIndex) -> DemuxerResult<()> {
  30
  31         let mut hdr = vec![0; 22];
  32                                           self.src.read_buf(&mut hdr)?;
  33
  34         validate!(&hdr[..4] == b"TTA1");
  35         let _afmt                       = read_u16le(&hdr[4..])?;
  36         let channels                    = read_u16le(&hdr[6..])?;
  37         validate!(channels > 0 && channels < 256);
  38         let bpp                         = read_u16le(&hdr[8..])?;
  39         validate!(bpp > 0 && bpp <= 32);
  40         let srate                       = read_u32le(&hdr[10..])?;
  41         validate!(srate > 256 && srate < 1048576);
  42         self.nsamples                   = read_u32le(&hdr[14..])?;
  43         validate!(self.nsamples > 0);
  44         let _crc                        = read_u32le(&hdr[18..])?;
  45
  46         self.framelen = srate * 256 / 245;
  47
  48         self.nframes = (self.nsamples + self.framelen - 1) / self.framelen;
  49
  50         seek_index.mode = SeekIndexMode::Present;
  51         let mut off = u64::from(self.nframes) * 4 + 4 + 22;
  52         let mut cur_time = 0;
  53         for pts in 0..self.nframes {
  54             let fsize                   = self.src.read_u32le()?;
  55             self.sizetab.push(fsize);
  56             self.offtab.push(off);
  57             let time = u64::from(cur_time) * 1000 / u64::from(srate);
  58             seek_index.add_entry(0, SeekEntry { time, pts: u64::from(pts), pos: off });
  59             off += u64::from(fsize);
  60             cur_time += self.framelen;
  61         }
  62
  63         let ahdr = NAAudioInfo::new(srate, channels as u8, SND_S16P_FORMAT, 1);
  64         let ainfo = NACodecInfo::new("tta", NACodecTypeInfo::Audio(ahdr), Some(hdr));
  65         strmgr.add_stream(NAStream::new(StreamType::Audio, 0, ainfo, self.framelen, srate, u64::from(self.nframes))).unwrap();
  66
  67         self.cur_frame = 0;
  68
  69         Ok(())
  70     }
  71     fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
  72         if self.cur_frame >= self.nframes {
  73             return Err(DemuxerError::EOF);
  74         }
  75
  76         let size = self.sizetab[self.cur_frame as usize] as usize;
  77         let off = self.offtab[self.cur_frame as usize];
  78         self.src.seek(SeekFrom::Start(off))?;
  79
  80         let stream = strmgr.get_stream(0).unwrap();
  81         let (tb_num, tb_den) = stream.get_timebase();
  82         let ts = NATimeInfo::new(Some(self.cur_frame.into()), None, None, tb_num, tb_den);
  83         let pkt = self.src.read_packet(stream, ts, true, size)?;
  84
  85         self.cur_frame += 1;
  86
  87         Ok(pkt)
  88     }
  89     fn seek(&mut self, time: NATimePoint, seek_index: &SeekIndex) -> DemuxerResult<()> {
  90         let ret = seek_index.find_pos(time);
  91         if ret.is_none() {
  92             return Err(DemuxerError::SeekError);
  93         }
  94         let seek_info = ret.unwrap();
  95         self.cur_frame = seek_info.pts as u32;
  96
  97         Ok(())
  98     }
  99     fn get_duration(&self) -> u64 { 0 }
 100 }
 101
 102 impl<'a> NAOptionHandler for TTADemuxer<'a> {
 103     fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
 104     fn set_options(&mut self, _options: &[NAOption]) { }
 105     fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
 106 }
 107
 108 pub struct TTADemuxerCreator { }
 109
 110 impl DemuxerCreator for TTADemuxerCreator {
 111     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
 112         Box::new(TTADemuxer::new(br))
 113     }
 114     fn get_name(&self) -> &'static str { "tta" }
 115 }
 116
 117 #[cfg(test)]
 118 mod test {
 119     use super::*;
 120     use std::fs::File;
 121
 122     #[test]
 123     fn test_tta_demux() {
 124         let mut file = File::open("assets/LLaudio/luckynight.tta").unwrap();
 125         let mut fr = FileReader::new_read(&mut file);
 126         let mut br = ByteReader::new(&mut fr);
 127         let mut dmx = TTADemuxer::new(&mut br);
 128         let mut sm = StreamManager::new();
 129         let mut si = SeekIndex::new();
 130         dmx.open(&mut sm, &mut si).unwrap();
 131         loop {
 132             let pktres = dmx.get_frame(&mut sm);
 133             if let Err(e) = pktres {
 134                 if (e as i32) == (DemuxerError::EOF as i32) { break; }
 135                 panic!("error");
 136             }
 137             let pkt = pktres.unwrap();
 138             println!("Got {}", pkt);
 139         }
 140     }
 141 }