crate for Duck decoders with TM RT decoder

[nihav.git] / nihav-duck / src / codecs / truemotionrt.rs

diff --git a/nihav-duck/src/codecs/truemotionrt.rs b/nihav-duck/src/codecs/truemotionrt.rs
new file mode 100644 (file)
index 0000000..3881ee7
--- /dev/null
+++ b/nihav-duck/src/codecs/truemotionrt.rs
@@ -0,0 +1,107 @@
+use nihav_core::codecs::*;
+use nihav_core::io::bitreader::*;
+
+#[derive(Default)]
+struct TMRTDecoder {
+    info:       Rc<NACodecInfo>,
+}
+
+const TMRT_DELTA_TAB: [&[i16]; 3] = [
+    &[ 5, -7, 36, -36 ],
+    &[ 2, -3, 8, -8, 18, -18, 36, -36 ],
+    &[ 1, -1, 2, -3, 8, -8, 18, -18, 36, -36, 54, -54, 96, -96, 144, -144 ]
+];
+
+impl TMRTDecoder {
+    fn new() -> Self { Self::default() }
+    fn decode_plane(&self, br: &mut BitReader, dst: &mut [u8], mut off: usize, stride: usize, w: usize, h: usize, hscale: bool, dbits: u8, is_chroma: bool) -> DecoderResult<()> {
+        let delta_tab = TMRT_DELTA_TAB[(dbits - 2) as usize];
+        let step = if !hscale { 1 } else { 2 };
+        for y in 0..h {
+            let mut diff = 0;
+            for x in (0..w).step_by(step) {
+                let delta                       = delta_tab[br.read(dbits)? as usize];
+                diff += delta;
+                let pred = if y > 0 { dst[off + x - stride].into() } else if !is_chroma { 0 } else { 0x80 };
+                dst[off + x] = (pred + diff).min(255).max(0) as u8;
+                if hscale {
+                    dst[off + x + 1] = dst[off + x];
+                }
+            }
+            off += stride;
+        }
+        Ok(())
+    }
+}
+
+impl NADecoder for TMRTDecoder {
+    fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
+        if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
+            let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(vinfo.get_width(), vinfo.get_height(), false, YUV410_FORMAT));
+            self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
+            Ok(())
+        } else {
+            Err(DecoderError::InvalidData)
+        }
+    }
+    fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
+        let src = pkt.get_buffer();
+        validate!(src.len() > 10);
+        let hdr_size = (src[0].rotate_left(3) & 0x7F) as usize;
+        validate!(hdr_size >= 10 && hdr_size < src.len() - 4);
+        let mut hdr: [u8; 127] = [0; 127];
+        for i in 1..hdr_size {
+            hdr[i - 1] = src[i] ^ src[i + 1];
+        }
+        let dbits  = hdr[1];
+        validate!(dbits >= 2 && dbits <= 4);
+        let hscale = hdr[3] != 0;
+        let width  = (hdr[7] as usize) | ((hdr[8] as usize) << 8);
+        let height = (hdr[5] as usize) | ((hdr[6] as usize) << 8);
+
+        let myinfo = NAVideoInfo::new(width, height, false, YUV410_FORMAT);
+        let bufret = alloc_video_buffer(myinfo, 2);
+        if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
+        let mut bufinfo = bufret.unwrap();
+        let mut buf = bufinfo.get_vbuf().unwrap();
+
+        let mut br = BitReader::new(&src[hdr_size..], src.len() - hdr_size, BitReaderMode::LE);
+        let size                                = br.read(32)? as usize;
+        validate!(size <= src.len() - hdr_size);
+        for plane in 0..3 {
+            let (w, h)  = buf.get_dimensions(plane);
+            let off     = buf.get_offset(plane);
+            let stride  = buf.get_stride(plane);
+            let mut data = buf.get_data_mut();
+            let dst = data.as_mut_slice();
+            self.decode_plane(&mut br, dst, off, stride, w, h, hscale, dbits, plane > 0)?;
+        }
+
+        let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
+        frm.set_keyframe(true);
+        frm.set_frame_type(FrameType::I);
+        Ok(Rc::new(RefCell::new(frm)))
+    }
+}
+
+pub fn get_decoder() -> Box<NADecoder> {
+    Box::new(TMRTDecoder::new())
+}
+
+#[cfg(test)]
+mod test {
+    use nihav_core::codecs::RegisteredDecoders;
+    use nihav_core::demuxers::RegisteredDemuxers;
+    use nihav_core::test::dec_video::*;
+    use crate::codecs::duck_register_all_codecs;
+    use nihav_commonfmt::demuxers::generic_register_all_demuxers;
+    #[test]
+    fn test_tmrt() {
+        let mut dmx_reg = RegisteredDemuxers::new();
+        generic_register_all_demuxers(&mut dmx_reg);
+        let mut dec_reg = RegisteredDecoders::new();
+        duck_register_all_codecs(&mut dec_reg);
+
+        test_file_decoding("avi", "assets/Duck/tr20_low.avi", Some(10), true, false, None/*Some("tmrt")*/, &dmx_reg, &dec_reg);
+    }
+}