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     duration:       u64,
  13 }
  14
  15 impl<'a> TTADemuxer<'a> {
  16     fn new(io: &'a mut ByteReader<'a>) -> Self {
  17         Self {
  18             src:            io,
  19             cur_frame:      0,
  20             nframes:        0,
  21             nsamples:       0,
  22             offtab:         Vec::new(),
  23             sizetab:        Vec::new(),
  24             framelen:       0,
  25             duration:       0,
  26         }
  27     }
  28 }
  29
  30 impl<'a> DemuxCore<'a> for TTADemuxer<'a> {
  31     fn open(&mut self, strmgr: &mut StreamManager, seek_index: &mut SeekIndex) -> DemuxerResult<()> {
  32
  33         let mut hdr = vec![0; 22];
  34                                           self.src.read_buf(&mut hdr)?;
  35
  36         validate!(&hdr[..4] == b"TTA1");
  37         let _afmt                       = read_u16le(&hdr[4..])?;
  38         let channels                    = read_u16le(&hdr[6..])?;
  39         validate!(channels > 0 && channels < 256);
  40         let bpp                         = read_u16le(&hdr[8..])?;
  41         validate!(bpp > 0 && bpp <= 32);
  42         let srate                       = read_u32le(&hdr[10..])?;
  43         validate!(srate > 256 && srate < 1048576);
  44         self.nsamples                   = read_u32le(&hdr[14..])?;
  45         validate!(self.nsamples > 0);
  46         let _crc                        = read_u32le(&hdr[18..])?;
  47
  48         self.framelen = srate * 256 / 245;
  49
  50         self.nframes = (self.nsamples + self.framelen - 1) / self.framelen;
  51         self.duration = u64::from(self.nsamples) * 1000 / u64::from(srate);
  52
  53         seek_index.mode = SeekIndexMode::Present;
  54         let mut off = u64::from(self.nframes) * 4 + 4 + 22;
  55         let mut cur_time = 0;
  56         for pts in 0..self.nframes {
  57             let fsize                   = self.src.read_u32le()?;
  58             self.sizetab.push(fsize);
  59             self.offtab.push(off);
  60             let time = u64::from(cur_time) * 1000 / u64::from(srate);
  61             seek_index.add_entry(0, SeekEntry { time, pts: u64::from(pts), pos: off });
  62             off += u64::from(fsize);
  63             cur_time += self.framelen;
  64         }
  65
  66         let ahdr = NAAudioInfo::new(srate, channels as u8, SND_S16P_FORMAT, 1);
  67         let ainfo = NACodecInfo::new("tta", NACodecTypeInfo::Audio(ahdr), Some(hdr));
  68         strmgr.add_stream(NAStream::new(StreamType::Audio, 0, ainfo, self.framelen, srate, u64::from(self.nframes))).unwrap();
  69
  70         self.cur_frame = 0;
  71
  72         Ok(())
  73     }
  74     fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
  75         if self.cur_frame >= self.nframes {
  76             return Err(DemuxerError::EOF);
  77         }
  78
  79         let size = self.sizetab[self.cur_frame as usize] as usize;
  80         let off = self.offtab[self.cur_frame as usize];
  81         self.src.seek(SeekFrom::Start(off))?;
  82
  83         let stream = strmgr.get_stream(0).unwrap();
  84         let ts = stream.make_ts(Some(self.cur_frame.into()), None, None);
  85         let pkt = self.src.read_packet(stream, ts, true, size)?;
  86
  87         self.cur_frame += 1;
  88
  89         Ok(pkt)
  90     }
  91     fn seek(&mut self, time: NATimePoint, seek_index: &SeekIndex) -> DemuxerResult<()> {
  92         let ret = seek_index.find_pos(time);
  93         if ret.is_none() {
  94             return Err(DemuxerError::SeekError);
  95         }
  96         let seek_info = ret.unwrap();
  97         self.cur_frame = seek_info.pts as u32;
  98
  99         Ok(())
 100     }
 101     fn get_duration(&self) -> u64 { self.duration }
 102 }
 103
 104 impl<'a> NAOptionHandler for TTADemuxer<'a> {
 105     fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
 106     fn set_options(&mut self, _options: &[NAOption]) { }
 107     fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
 108 }
 109
 110 pub struct TTADemuxerCreator { }
 111
 112 impl DemuxerCreator for TTADemuxerCreator {
 113     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
 114         Box::new(TTADemuxer::new(br))
 115     }
 116     fn get_name(&self) -> &'static str { "tta" }
 117 }
 118
 119 #[cfg(test)]
 120 mod test {
 121     use super::*;
 122     use std::fs::File;
 123
 124     #[test]
 125     fn test_tta_demux() {
 126         // sample: https://samples.mplayerhq.hu/A-codecs/lossless/luckynight.tta
 127         let mut file = File::open("assets/LLaudio/luckynight.tta").unwrap();
 128         let mut fr = FileReader::new_read(&mut file);
 129         let mut br = ByteReader::new(&mut fr);
 130         let mut dmx = TTADemuxer::new(&mut br);
 131         let mut sm = StreamManager::new();
 132         let mut si = SeekIndex::new();
 133         dmx.open(&mut sm, &mut si).unwrap();
 134         loop {
 135             let pktres = dmx.get_frame(&mut sm);
 136             if let Err(e) = pktres {
 137                 if (e as i32) == (DemuxerError::EOF as i32) { break; }
 138                 panic!("error");
 139             }
 140             let pkt = pktres.unwrap();
 141             println!("Got {}", pkt);
 142         }
 143     }
 144 }