X-Git-Url: https://git.nihav.org/?a=blobdiff_plain;f=nihav-llaudio%2Fsrc%2Fdemuxers%2Ftta.rs;fp=nihav-llaudio%2Fsrc%2Fdemuxers%2Ftta.rs;h=97ee808c01163898d54d112184606ad89a0bfcf9;hb=87927c5732b39bb23209486bed8d7bb7fc56b92e;hp=0000000000000000000000000000000000000000;hpb=640b1eb06b5c5e0678bc35d2e2e297e4b3bda540;p=nihav.git

diff --git a/nihav-llaudio/src/demuxers/tta.rs b/nihav-llaudio/src/demuxers/tta.rs
new file mode 100644
index 0000000..97ee808
--- /dev/null
+++ b/nihav-llaudio/src/demuxers/tta.rs
@@ -0,0 +1,140 @@
+use nihav_core::frame::*;
+use nihav_core::demuxers::*;
+
+struct TTADemuxer<'a> {
+    src:            &'a mut ByteReader<'a>,
+    cur_frame:      u32,
+    nframes:        u32,
+    nsamples:       u32,
+    offtab:         Vec<u64>,
+    sizetab:        Vec<u32>,
+    framelen:       u32,
+}
+
+impl<'a> TTADemuxer<'a> {
+    fn new(io: &'a mut ByteReader<'a>) -> Self {
+        Self {
+            src:            io,
+            cur_frame:      0,
+            nframes:        0,
+            nsamples:       0,
+            offtab:         Vec::new(),
+            sizetab:        Vec::new(),
+            framelen:       0,
+        }
+    }
+}
+
+impl<'a> DemuxCore<'a> for TTADemuxer<'a> {
+    fn open(&mut self, strmgr: &mut StreamManager, seek_index: &mut SeekIndex) -> DemuxerResult<()> {
+
+        let mut hdr = vec![0; 22];
+                                          self.src.read_buf(&mut hdr)?;
+
+        validate!(&hdr[..4] == b"TTA1");
+        let _afmt                       = read_u16le(&hdr[4..])?;
+        let channels                    = read_u16le(&hdr[6..])?;
+        validate!(channels > 0 && channels < 256);
+        let bpp                         = read_u16le(&hdr[8..])?;
+        validate!(bpp > 0 && bpp <= 32);
+        let srate                       = read_u32le(&hdr[10..])?;
+        validate!(srate > 256 && srate < 1048576);
+        self.nsamples                   = read_u32le(&hdr[14..])?;
+        validate!(self.nsamples > 0);
+        let _crc                        = read_u32le(&hdr[18..])?;
+
+        self.framelen = srate * 256 / 245;
+
+        self.nframes = (self.nsamples + self.framelen - 1) / self.framelen;
+
+        seek_index.mode = SeekIndexMode::Present;
+        let mut off = u64::from(self.nframes) * 4 + 4 + 22;
+        let mut cur_time = 0;
+        for pts in 0..self.nframes {
+            let fsize                   = self.src.read_u32le()?;
+            self.sizetab.push(fsize);
+            self.offtab.push(off);
+            let time = u64::from(cur_time) * 1000 / u64::from(srate);
+            seek_index.add_entry(0, SeekEntry { time, pts: u64::from(pts), pos: off });
+            off += u64::from(fsize);
+            cur_time += self.framelen;
+        }
+
+        let ahdr = NAAudioInfo::new(srate, channels as u8, SND_S16P_FORMAT, 1);
+        let ainfo = NACodecInfo::new("tta", NACodecTypeInfo::Audio(ahdr), Some(hdr));
+        strmgr.add_stream(NAStream::new(StreamType::Audio, 0, ainfo, self.framelen, srate)).unwrap();
+
+        self.cur_frame = 0;
+
+        Ok(())
+    }
+    fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
+        if self.cur_frame >= self.nframes {
+            return Err(DemuxerError::EOF);
+        }
+
+        let size = self.sizetab[self.cur_frame as usize] as usize;
+        let off = self.offtab[self.cur_frame as usize];
+        self.src.seek(SeekFrom::Start(off))?;
+
+        let stream = strmgr.get_stream(0).unwrap();
+        let (tb_num, tb_den) = stream.get_timebase();
+        let ts = NATimeInfo::new(Some(self.cur_frame.into()), None, None, tb_num, tb_den);
+        let pkt = self.src.read_packet(stream, ts, true, size)?;
+
+        self.cur_frame += 1;
+
+        Ok(pkt)
+    }
+    fn seek(&mut self, time: NATimePoint, seek_index: &SeekIndex) -> DemuxerResult<()> {
+        let ret = seek_index.find_pos(time);
+        if ret.is_none() {
+            return Err(DemuxerError::SeekError);
+        }
+        let seek_info = ret.unwrap();
+        self.cur_frame = seek_info.pts as u32;
+
+        Ok(())
+    }
+}
+
+impl<'a> NAOptionHandler for TTADemuxer<'a> {
+    fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
+    fn set_options(&mut self, _options: &[NAOption]) { }
+    fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
+}
+
+pub struct TTADemuxerCreator { }
+
+impl DemuxerCreator for TTADemuxerCreator {
+    fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
+        Box::new(TTADemuxer::new(br))
+    }
+    fn get_name(&self) -> &'static str { "tta" }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use std::fs::File;
+
+    #[test]
+    fn test_tta_demux() {
+        let mut file = File::open("assets/LLaudio/luckynight.tta").unwrap();
+        let mut fr = FileReader::new_read(&mut file);
+        let mut br = ByteReader::new(&mut fr);
+        let mut dmx = TTADemuxer::new(&mut br);
+        let mut sm = StreamManager::new();
+        let mut si = SeekIndex::new();
+        dmx.open(&mut sm, &mut si).unwrap();
+        loop {
+            let pktres = dmx.get_frame(&mut sm);
+            if let Err(e) = pktres {
+                if (e as i32) == (DemuxerError::EOF as i32) { break; }
+                panic!("error");
+            }
+            let pkt = pktres.unwrap();
+            println!("Got {}", pkt);
+        }
+    }
+}