[nihav.git] / src / codecs / intel263.rs

use io::bitreader::*;
use io::codebook::*;
use formats;
use super::*;
use super::blockdec::*;
use super::h263data::*;

#[allow(dead_code)]
struct Tables {
    intra_mcbpc_cb: Codebook<u8>,
    inter_mcbpc_cb: Codebook<u8>,
    cbpy_cb:        Codebook<u8>,
    rl_cb:          Codebook<H263RLSym>,
    aic_rl_cb:      Codebook<H263RLSym>,
    mv_cb:          Codebook<u8>,
}

struct Intel263Decoder {
    info:    Rc<NACodecInfo>,
    dec:     DCT8x8VideoDecoder,
    tables:  Tables,
}

struct Intel263BR<'a> {
    br:     BitReader<'a>,
    tables: &'a Tables,
    gob_no: usize,
    mb_w:   usize,
    is_pb:  bool,
}

fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
    let mark = br.read(1)?;
    validate!(mark == 1);
    Ok(())
}

impl<'a> Intel263BR<'a> {
    fn new(src: &'a [u8], tables: &'a Tables) -> Self {
        Intel263BR {
            br:     BitReader::new(src, src.len(), BitReaderMode::BE),
            tables: tables,
            gob_no: 0,
            mb_w:   0,
            is_pb:  false,
        }
    }

    fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
        let mut br = &mut self.br;
        let mut idx = 0;
        if intra {
            let mut dc = br.read(8)?;
            if dc == 255 { dc = 128; }
            blk[0] = (dc as i16) << 3;
            idx = 1;
        }
        if !coded { return Ok(()); }

        let rl_cb = &self.tables.rl_cb; // could be aic too
        let q_add = if quant == 0 { 0i16 } else { ((quant - 1) | 1) as i16 };
        let q = (quant * 2) as i16;
        while idx < 64 {
            let code = br.read_cb(rl_cb)?;
            let run;
            let mut level;
            let last;
            if !code.is_escape() {
                run   = code.get_run();
                level = code.get_level();
                last  = code.is_last();
                if br.read_bool()? { level = -level; }
                level = (level * q) + q_add;
            } else {
                last  = br.read_bool()?;
                run   = br.read(6)? as u8;
                level = br.read_s(8)? as i16;
                if level == -128 {
                    let low = br.read(5)? as i16;
                    let top = br.read_s(6)? as i16;
                    level = (top << 5) | low;
                }
                level = (level * q) + q_add;
                if level < -2048 { level = -2048; }
                if level >  2047 { level =  2047; }
            }
            idx += run;
            validate!(idx < 64);
            let oidx = H263_ZIGZAG[idx as usize];
            blk[oidx] = level;
            idx += 1;
            if last { break; }
        }
        Ok(())
    }
}

fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
    let code = br.read_cb(mv_cb)? as i16;
    if code == 0 { return Ok(0) }
    if !br.read_bool()? {
        Ok(code)
    } else {
        Ok(-code)
    }
}

fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
    let xval = decode_mv_component(br, mv_cb)?;
    let yval = decode_mv_component(br, mv_cb)?;
    Ok(MV::new(xval, yval))
}

fn decode_b_info(br: &mut BitReader, is_pb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
    if is_pb { // as improved pb
        let pb_mv_add = if is_intra { 1 } else { 0 };
        if br.read_bool()?{
            if br.read_bool()? {
                let pb_mv_count = 1 - (br.read(1)? as usize);
                let cbpb = br.read(6)? as u8;
                Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
            } else {
                Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
            }
        } else {
            Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
        }
    } else {
        Ok(BBlockInfo::new(false, 0, 0, false))
    }
}

impl<'a> BlockDecoder for Intel263BR<'a> {

#[allow(unused_variables)]
    fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
        let mut br = &mut self.br;
        let syncw = br.read(22)?;
        validate!(syncw == 0x000020);
        let tr = br.read(8)? as u8;
        check_marker(br)?;
        let id = br.read(1)?;
        validate!(id == 0);
        br.read(1)?; // split screen indicator
        br.read(1)?; // document camera indicator
        br.read(1)?; // freeze picture release
        let mut sfmt = br.read(3)?;
        validate!((sfmt != 0b000) && (sfmt != 0b110));
        let is_intra = !br.read_bool()?;
        let umv = br.read_bool()?;
        br.read(1)?; // syntax arithmetic coding
        let apm = br.read_bool()?;
        self.is_pb = br.read_bool()?;
        let deblock;
        if sfmt == 0b111 {
            sfmt = br.read(3)?;
            validate!((sfmt != 0b000) && (sfmt != 0b111));
            br.read(2)?; // unknown flags
            deblock = br.read_bool()?;
            br.read(1)?; // unknown flag
            let pbplus = br.read_bool()?;
            br.read(5)?; // unknown flags
            let marker = br.read(5)?;
            validate!(marker == 1);
        } else {
            deblock = false;
        }
        let w; let h;
        if sfmt == 0b110 {
            let par = br.read(4)?;
            w = ((br.read(9)? + 1) * 4) as usize;
            check_marker(br)?;
            h = ((br.read(9)? + 1) * 4) as usize;
            if par == 0b1111 {
                let pixw = br.read(8)?;
                let pixh = br.read(8)?;
                validate!((pixw != 0) && (pixh != 0));
            }
        } else {
            let (w_, h_) = H263_SIZES[sfmt as usize];
            w = w_;
            h = h_;
        }
        let quant = br.read(5)?;
        let cpm = br.read_bool()?;
        validate!(!cpm);

        let pbinfo;
        if self.is_pb {
            let trb = br.read(3)?;
            let dbquant = br.read(2)?;
            pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8));
        } else {
            pbinfo = None;
        }
        while br.read_bool()? { // skip PEI
            br.read(8)?;
        }
//println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
        self.gob_no = 0;
        self.mb_w = (w + 15) >> 4;

        let ftype = if is_intra { Type::I } else { Type::P };
        let picinfo = PicInfo::new(w, h, ftype, quant as u8, apm, umv, tr, pbinfo, deblock);
        Ok(picinfo)
    }

    #[allow(unused_variables)]
    fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<Slice> {
        let mut br = &mut self.br;
        let gbsc = br.read(17)?;
        validate!(gbsc == 1);
        let gn = br.read(5)?;
        let gfid = br.read(2)?;
        let gquant = br.read(5)?;
//println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
        let ret = Slice::new(0, self.gob_no, gquant as u8);
        self.gob_no += 1;
        Ok(ret)
    }

    fn decode_block_header(&mut self, info: &PicInfo, slice: &Slice) -> DecoderResult<BlockInfo> {
        let mut br = &mut self.br;
        let mut q = slice.get_quant();
        match info.get_mode() {
            Type::I => {
                    let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
                    while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
                    let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
                    let cbp = (cbpy << 2) | (cbpc & 3);
                    let dquant = (cbpc & 4) != 0;
                    if dquant {
                        let idx = br.read(2)? as usize;
                        q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
                    }
                    Ok(BlockInfo::new(Type::I, cbp, q))
                },
            Type::P => {
                    if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
                    let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
                    while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
                    let is_intra = (cbpc & 0x04) != 0;
                    let dquant   = (cbpc & 0x08) != 0;
                    let is_4x4   = (cbpc & 0x10) != 0;
                    if is_intra {
                        let mut mvec: Vec<MV> = Vec::new();
                        let bbinfo = decode_b_info(br, self.is_pb, true)?;
                        let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
                        let cbp = (cbpy << 2) | (cbpc & 3);
                        if dquant {
                            let idx = br.read(2)? as usize;
                            q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
                        }
                        let mut binfo = BlockInfo::new(Type::I, cbp, q);
                        binfo.set_bpart(bbinfo);
                        if self.is_pb {
                            for _ in 0..bbinfo.get_num_mv() {
                                mvec.push(decode_mv(br, &self.tables.mv_cb)?);
                            }
                            binfo.set_b_mv(mvec.as_slice());
                        }
                        return Ok(binfo);
                    }

                    let bbinfo = decode_b_info(br, self.is_pb, false)?;
                    let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
//                    if /* !aiv && */(cbpc & 3) != 3 {
                        cbpy ^= 0xF;
//                    }
                    let cbp = (cbpy << 2) | (cbpc & 3);
                    if dquant {
                        let idx = br.read(2)? as usize;
                        q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
                    }
                    let mut binfo = BlockInfo::new(Type::P, cbp, q);
                    binfo.set_bpart(bbinfo);
                    if !is_4x4 {
                        let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
                        binfo.set_mv(&mvec);
                    } else {
                        let mvec: [MV; 4] = [
                                decode_mv(br, &self.tables.mv_cb)?,
                                decode_mv(br, &self.tables.mv_cb)?,
                                decode_mv(br, &self.tables.mv_cb)?,
                                decode_mv(br, &self.tables.mv_cb)?
                            ];
                        binfo.set_mv(&mvec);
                    }
                    if self.is_pb {
                        let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
                        for _ in 0..bbinfo.get_num_mv() {
                            let mv = decode_mv(br, &self.tables.mv_cb)?;
                            mvec.push(mv);
                        }
                        binfo.set_b_mv(mvec.as_slice());
                    }
                    Ok(binfo)
                },
            _ => { Err(DecoderError::InvalidData) },
        }
    }

    #[allow(unused_variables)]
    fn decode_block_intra(&mut self, info: &BlockInfo, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
        self.decode_block(quant, true, coded, blk)
    }

    #[allow(unused_variables)]
    fn decode_block_inter(&mut self, info: &BlockInfo, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
        self.decode_block(quant, false, coded, blk)
    }

    fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }

    fn filter_row(&mut self, buf: &mut NAVideoBuffer<u8>, mb_y: usize, mb_w: usize, cbpi: &CBPInfo) {
        let stride  = buf.get_stride(0);
        let mut off = buf.get_offset(0) + mb_y * 16 * stride;
        for mb_x in 0..mb_w {
            let coff = off;
            let coded0 = cbpi.is_coded(mb_x, 0);
            let coded1 = cbpi.is_coded(mb_x, 1);
            let q = cbpi.get_q(mb_w + mb_x);
            if mb_y != 0 {
                if coded0 && cbpi.is_coded_top(mb_x, 0) { deblock_hor(buf, 0, q, coff); }
                if coded1 && cbpi.is_coded_top(mb_x, 1) { deblock_hor(buf, 0, q, coff + 8); }
            }
            let coff = off + 8 * stride;
            if cbpi.is_coded(mb_x, 2) && coded0 { deblock_hor(buf, 0, q, coff); }
            if cbpi.is_coded(mb_x, 3) && coded1 { deblock_hor(buf, 0, q, coff + 8); }
            off += 16;
        }
        let mut leftt = false;
        let mut leftc = false;
        let mut off = buf.get_offset(0) + mb_y * 16 * stride;
        for mb_x in 0..mb_w {
            let ctop0 = cbpi.is_coded_top(mb_x, 0);
            let ctop1 = cbpi.is_coded_top(mb_x, 0);
            let ccur0 = cbpi.is_coded(mb_x, 0);
            let ccur1 = cbpi.is_coded(mb_x, 1);
            let q = cbpi.get_q(mb_w + mb_x);
            if mb_y != 0 {
                let coff = off - 8 * stride;
                let qtop = cbpi.get_q(mb_x);
                if leftt && ctop0 { deblock_ver(buf, 0, qtop, coff); }
                if ctop0 && ctop1 { deblock_ver(buf, 0, qtop, coff + 8); }
            }
            if leftc && ccur0 { deblock_ver(buf, 0, q, off); }
            if ccur0 && ccur1 { deblock_ver(buf, 0, q, off + 8); }
            leftt = ctop1;
            leftc = ccur1;
            off += 16;
        }
        let strideu  = buf.get_stride(1);
        let stridev  = buf.get_stride(2);
        let offu = buf.get_offset(1) + mb_y * 8 * strideu;
        let offv = buf.get_offset(2) + mb_y * 8 * stridev;
        if mb_y != 0 {
            for mb_x in 0..mb_w {
                let ctu = cbpi.is_coded_top(mb_x, 4);
                let ccu = cbpi.is_coded(mb_x, 4);
                let ctv = cbpi.is_coded_top(mb_x, 5);
                let ccv = cbpi.is_coded(mb_x, 5);
                let q = cbpi.get_q(mb_w + mb_x);
                if ctu && ccu { deblock_hor(buf, 1, q, offu + mb_x * 8); }
                if ctv && ccv { deblock_hor(buf, 2, q, offv + mb_x * 8); }
            }
            let mut leftu = false;
            let mut leftv = false;
            let offu = buf.get_offset(1) + (mb_y - 1) * 8 * strideu;
            let offv = buf.get_offset(2) + (mb_y - 1) * 8 * stridev;
            for mb_x in 0..mb_w {
                let ctu = cbpi.is_coded_top(mb_x, 4);
                let ctv = cbpi.is_coded_top(mb_x, 5);
                let qt = cbpi.get_q(mb_x);
                if leftu && ctu { deblock_ver(buf, 1, qt, offu + mb_x * 8); }
                if leftv && ctv { deblock_ver(buf, 2, qt, offv + mb_x * 8); }
                leftu = ctu;
                leftv = ctv;
            }
        }
    }
}

fn deblock_hor(buf: &mut NAVideoBuffer<u8>, comp: usize, q: u8, off: usize) {
    let stride = buf.get_stride(comp);
    let mut dptr = buf.get_data_mut();
    let mut buf = dptr.as_mut_slice();
    for x in 0..8 {
        let a = buf[off - 2 * stride + x] as i16;
        let b = buf[off - 1 * stride + x] as i16;
        let c = buf[off + 0 * stride + x] as i16;
        let d = buf[off + 1 * stride + x] as i16;
        let diff = ((a - d) * 3 + (c - b) * 8) >> 4;
        if (diff != 0) && (diff >= -32) && (diff < 32) {
            let d0 = diff.abs() * 2 - (q as i16);
            let d1 = if d0 < 0 { 0 } else { d0 };
            let d2 = diff.abs() - d1;
            let d3 = if d2 < 0 { 0 } else { d2 };

            let delta = if diff < 0 { -d3 } else { d3 };

            let b1 = b + delta;
            if      b1 < 0   { buf[off - 1 * stride + x] = 0; }
            else if b1 > 255 { buf[off - 1 * stride + x] = 0xFF; }
            else             { buf[off - 1 * stride + x] = b1 as u8; }
            let c1 = c - delta;
            if      c1 < 0   { buf[off + x] = 0; }
            else if c1 > 255 { buf[off + x] = 0xFF; }
            else             { buf[off + x] = c1 as u8; }
        }
    }
}

fn deblock_ver(buf: &mut NAVideoBuffer<u8>, comp: usize, q: u8, off: usize) {
    let stride = buf.get_stride(comp);
    let mut dptr = buf.get_data_mut();
    let mut buf = dptr.as_mut_slice();
    for y in 0..8 {
        let a = buf[off - 2 + y * stride] as i16;
        let b = buf[off - 1 + y * stride] as i16;
        let c = buf[off + 0 + y * stride] as i16;
        let d = buf[off + 1 + y * stride] as i16;
        let diff = ((a - d) * 3 + (c - b) * 8) >> 4;
        if (diff != 0) && (diff >= -32) && (diff < 32) {
            let d0 = diff.abs() * 2 - (q as i16);
            let d1 = if d0 < 0 { 0 } else { d0 };
            let d2 = diff.abs() - d1;
            let d3 = if d2 < 0 { 0 } else { d2 };

            let delta = if diff < 0 { -d3 } else { d3 };

            let b1 = b + delta;
            if      b1 < 0   { buf[off - 1 + y * stride] = 0; }
            else if b1 > 255 { buf[off - 1 + y * stride] = 0xFF; }
            else             { buf[off - 1 + y * stride] = b1 as u8; }
            let c1 = c - delta;
            if      c1 < 0   { buf[off + y * stride] = 0; }
            else if c1 > 255 { buf[off + y * stride] = 0xFF; }
            else             { buf[off + y * stride] = c1 as u8; }
        }
    }
}

impl Intel263Decoder {
    fn new() -> Self {
        let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
        let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
        let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
        let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
        let mut coderead = H263ShortCodeReader::new(H263_CBPY);
        let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
        let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
        let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
        let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
        let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
        let mut coderead = H263ShortCodeReader::new(H263_MV);
        let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
        let tables = Tables {
            intra_mcbpc_cb: intra_mcbpc_cb,
            inter_mcbpc_cb: inter_mcbpc_cb,
            cbpy_cb:        cbpy_cb,
            rl_cb:          rl_cb,
            aic_rl_cb:      aic_rl_cb,
            mv_cb:          mv_cb,
        };

        Intel263Decoder{
            info:           Rc::new(DUMMY_CODEC_INFO),
            dec:            DCT8x8VideoDecoder::new(),
            tables:         tables,
        }
    }
}

impl NADecoder for Intel263Decoder {
    fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
        if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
            let w = vinfo.get_width();
            let h = vinfo.get_height();
            let fmt = formats::YUV420_FORMAT;
            let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
            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();

        if src.len() == 8 {
            let bret = self.dec.get_bframe();
            let buftype;
            let is_skip;
            if let Ok(btype) = bret {
                buftype = btype;
                is_skip = false;
            } else {
                buftype = NABufferType::None;
                is_skip = true;
            }
            let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
            frm.set_keyframe(false);
            frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B });
            return Ok(Rc::new(RefCell::new(frm)));
        }
        let mut ibr = Intel263BR::new(&src, &self.tables);

        let bufinfo = self.dec.parse_frame(&mut ibr)?;

        let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
        frm.set_keyframe(self.dec.is_intra());
        frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
        Ok(Rc::new(RefCell::new(frm)))
    }
}


pub fn get_decoder() -> Box<NADecoder> {
    Box::new(Intel263Decoder::new())
}

#[cfg(test)]
mod test {
    use codecs::*;
    use demuxers::*;
    use io::byteio::*;

    #[test]
    fn test_intel263() {
        let avi_dmx = find_demuxer("avi").unwrap();
        let mut file = File::open("assets/neal73_saber.avi").unwrap();
        let mut fr = FileReader::new_read(&mut file);
        let mut br = ByteReader::new(&mut fr);
        let mut dmx = avi_dmx.new_demuxer(&mut br);
        dmx.open().unwrap();

        let mut decs: Vec<Option<Box<NADecoder>>> = Vec::new();
        for i in 0..dmx.get_num_streams() {
            let s = dmx.get_stream(i).unwrap();
            let info = s.get_info();
            let decfunc = find_decoder(info.get_name());
            if let Some(df) = decfunc {
                let mut dec = (df)();
                dec.init(info).unwrap();
                decs.push(Some(dec));
            } else {
                decs.push(None);
            }
        }

        loop {
            let pktres = dmx.get_frame();
            if let Err(e) = pktres {
                if e == DemuxerError::EOF { break; }
                panic!("error");
            }
            let pkt = pktres.unwrap();
            //if pkt.get_pts().unwrap() > 263 { break; }
            let streamno = pkt.get_stream().get_id() as usize;
            if let Some(ref mut dec) = decs[streamno] {
                let frm = dec.decode(&pkt).unwrap();
                if pkt.get_stream().get_info().is_video() {
                    write_pgmyuv("ih263_", streamno, pkt.get_pts().unwrap(), frm);
                }
            }
        }
//panic!("THE END");
    }
}
Commit	Line	Data
cf64af13 KS	1	use io::bitreader::*;
	2	use io::codebook::*;
	3	use formats;
	4	use super::*;
	5	use super::blockdec::*;
	6	use super::h263data::*;
	7
	8	#[allow(dead_code)]
	9	struct Tables {
	10	intra_mcbpc_cb: Codebook<u8>,
	11	inter_mcbpc_cb: Codebook<u8>,
	12	cbpy_cb: Codebook<u8>,
	13	rl_cb: Codebook<H263RLSym>,
	14	aic_rl_cb: Codebook<H263RLSym>,
	15	mv_cb: Codebook<u8>,
	16	}
	17
	18	struct Intel263Decoder {
	19	info: Rc<NACodecInfo>,
	20	dec: DCT8x8VideoDecoder,
	21	tables: Tables,
	22	}
	23
	24	struct Intel263BR<'a> {
	25	br: BitReader<'a>,
	26	tables: &'a Tables,
	27	gob_no: usize,
	28	mb_w: usize,
	29	is_pb: bool,
	30	}
	31
	32	fn check_marker<'a>(br: &mut BitReader<'a>) -> DecoderResult<()> {
	33	let mark = br.read(1)?;
	34	validate!(mark == 1);
	35	Ok(())
	36	}
	37
	38	impl<'a> Intel263BR<'a> {
	39	fn new(src: &'a [u8], tables: &'a Tables) -> Self {
	40	Intel263BR {
	41	br: BitReader::new(src, src.len(), BitReaderMode::BE),
	42	tables: tables,
	43	gob_no: 0,
	44	mb_w: 0,
	45	is_pb: false,
	46	}
	47	}
	48
	49	fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
	50	let mut br = &mut self.br;
	51	let mut idx = 0;
	52	if intra {
	53	let mut dc = br.read(8)?;
	54	if dc == 255 { dc = 128; }
	55	blk[0] = (dc as i16) << 3;
	56	idx = 1;
	57	}
	58	if !coded { return Ok(()); }
	59
	60	let rl_cb = &self.tables.rl_cb; // could be aic too
	61	let q_add = if quant == 0 { 0i16 } else { ((quant - 1) \| 1) as i16 };
	62	let q = (quant * 2) as i16;
	63	while idx < 64 {
	64	let code = br.read_cb(rl_cb)?;
65	let run;
66	let mut level;
67	let last;
68	if !code.is_escape() {
69	run = code.get_run();
70	level = code.get_level();
71	last = code.is_last();
72	if br.read_bool()? { level = -level; }
73	level = (level * q) + q_add;
74	} else {
75	last = br.read_bool()?;
76	run = br.read(6)? as u8;
77	level = br.read_s(8)? as i16;
78	if level == -128 {
79	let low = br.read(5)? as i16;
80	let top = br.read_s(6)? as i16;
81	level = (top << 5) \| low;
82	}
83	level = (level * q) + q_add;
84	if level < -2048 { level = -2048; }
85	if level > 2047 { level = 2047; }
86	}
87	idx += run;
88	validate!(idx < 64);
89	let oidx = H263_ZIGZAG[idx as usize];
90	blk[oidx] = level;
91	idx += 1;
92	if last { break; }
93	}
94	Ok(())
95	}
96	}
97
98	fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
99	let code = br.read_cb(mv_cb)? as i16;
100	if code == 0 { return Ok(0) }
101	if !br.read_bool()? {
102	Ok(code)
103	} else {
104	Ok(-code)
105	}
106	}
107
108	fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
109	let xval = decode_mv_component(br, mv_cb)?;
110	let yval = decode_mv_component(br, mv_cb)?;
111	Ok(MV::new(xval, yval))
112	}
113
21c16d5f KS	114	fn decode_b_info(br: &mut BitReader, is_pb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
	115	if is_pb { // as improved pb
	116	let pb_mv_add = if is_intra { 1 } else { 0 };
	117	if br.read_bool()?{
	118	if br.read_bool()? {
	119	let pb_mv_count = 1 - (br.read(1)? as usize);
	120	let cbpb = br.read(6)? as u8;
	121	Ok(BBlockInfo::new(true, cbpb, pb_mv_count + pb_mv_add, pb_mv_count == 1))
	122	} else {
	123	Ok(BBlockInfo::new(true, 0, 1 + pb_mv_add, true))
	124	}
	125	} else {
	126	Ok(BBlockInfo::new(true, 0, pb_mv_add, false))
	127	}
	128	} else {
	129	Ok(BBlockInfo::new(false, 0, 0, false))
	130	}
	131	}
	132
cf64af13 KS	133	impl<'a> BlockDecoder for Intel263BR<'a> {
	134
	135	#[allow(unused_variables)]
	136	fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
	137	let mut br = &mut self.br;
	138	let syncw = br.read(22)?;
	139	validate!(syncw == 0x000020);
	140	let tr = br.read(8)? as u8;
	141	check_marker(br)?;
	142	let id = br.read(1)?;
	143	validate!(id == 0);
	144	br.read(1)?; // split screen indicator
	145	br.read(1)?; // document camera indicator
	146	br.read(1)?; // freeze picture release
	147	let mut sfmt = br.read(3)?;
	148	validate!((sfmt != 0b000) && (sfmt != 0b110));
	149	let is_intra = !br.read_bool()?;
	150	let umv = br.read_bool()?;
	151	br.read(1)?; // syntax arithmetic coding
	152	let apm = br.read_bool()?;
	153	self.is_pb = br.read_bool()?;
f2f1afb2	154	let deblock;
cf64af13 KS	155	if sfmt == 0b111 {
	156	sfmt = br.read(3)?;
	157	validate!((sfmt != 0b000) && (sfmt != 0b111));
	158	br.read(2)?; // unknown flags
f2f1afb2	159	deblock = br.read_bool()?;
cf64af13 KS	160	br.read(1)?; // unknown flag
	161	let pbplus = br.read_bool()?;
	162	br.read(5)?; // unknown flags
	163	let marker = br.read(5)?;
	164	validate!(marker == 1);
f2f1afb2 KS	165	} else {
f2f1afb2 KS	166	deblock = false;
cf64af13 KS	167	}
	168	let w; let h;
	169	if sfmt == 0b110 {
	170	let par = br.read(4)?;
	171	w = ((br.read(9)? + 1) * 4) as usize;
	172	check_marker(br)?;
	173	h = ((br.read(9)? + 1) * 4) as usize;
	174	if par == 0b1111 {
	175	let pixw = br.read(8)?;
	176	let pixh = br.read(8)?;
	177	validate!((pixw != 0) && (pixh != 0));
	178	}
	179	} else {
	180	let (w_, h_) = H263_SIZES[sfmt as usize];
	181	w = w_;
	182	h = h_;
	183	}
	184	let quant = br.read(5)?;
	185	let cpm = br.read_bool()?;
	186	validate!(!cpm);
21c16d5f KS	187
21c16d5f KS	188	let pbinfo;
cf64af13 KS	189	if self.is_pb {
	190	let trb = br.read(3)?;
	191	let dbquant = br.read(2)?;
21c16d5f KS	192	pbinfo = Some(PBInfo::new(trb as u8, dbquant as u8));
	193	} else {
	194	pbinfo = None;
cf64af13 KS	195	}
	196	while br.read_bool()? { // skip PEI
	197	br.read(8)?;
	198	}
21c16d5f	199	//println!("frame {}x{} intra: {} q {} pb {} apm {} umv {} @{}", w, h, is_intra, quant, self.is_pb, apm, umv, br.tell());
cf64af13 KS	200	self.gob_no = 0;
	201	self.mb_w = (w + 15) >> 4;
	202
	203	let ftype = if is_intra { Type::I } else { Type::P };
f2f1afb2	204	let picinfo = PicInfo::new(w, h, ftype, quant as u8, apm, umv, tr, pbinfo, deblock);
cf64af13 KS	205	Ok(picinfo)
	206	}
	207
	208	#[allow(unused_variables)]
	209	fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<Slice> {
	210	let mut br = &mut self.br;
	211	let gbsc = br.read(17)?;
cf64af13 KS	212	validate!(gbsc == 1);
	213	let gn = br.read(5)?;
	214	let gfid = br.read(2)?;
	215	let gquant = br.read(5)?;
21c16d5f	216	//println!("GOB gn {:X} id {} q {}", gn, gfid, gquant);
cf64af13 KS	217	let ret = Slice::new(0, self.gob_no, gquant as u8);
	218	self.gob_no += 1;
	219	Ok(ret)
	220	}
	221
	222	fn decode_block_header(&mut self, info: &PicInfo, slice: &Slice) -> DecoderResult<BlockInfo> {
	223	let mut br = &mut self.br;
	224	let mut q = slice.get_quant();
	225	match info.get_mode() {
	226	Type::I => {
	227	let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
	228	while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
	229	let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
	230	let cbp = (cbpy << 2) \| (cbpc & 3);
	231	let dquant = (cbpc & 4) != 0;
	232	if dquant {
	233	let idx = br.read(2)? as usize;
	234	q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
	235	}
cf64af13 KS	236	Ok(BlockInfo::new(Type::I, cbp, q))
	237	},
	238	Type::P => {
cf64af13 KS	239	if br.read_bool()? { return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant())); }
	240	let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
	241	while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
	242	let is_intra = (cbpc & 0x04) != 0;
	243	let dquant = (cbpc & 0x08) != 0;
	244	let is_4x4 = (cbpc & 0x10) != 0;
	245	if is_intra {
	246	let mut mvec: Vec<MV> = Vec::new();
21c16d5f	247	let bbinfo = decode_b_info(br, self.is_pb, true)?;
cf64af13 KS	248	let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
	249	let cbp = (cbpy << 2) \| (cbpc & 3);
	250	if dquant {
	251	let idx = br.read(2)? as usize;
	252	q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
	253	}
	254	let mut binfo = BlockInfo::new(Type::I, cbp, q);
21c16d5f	255	binfo.set_bpart(bbinfo);
cf64af13	256	if self.is_pb {
21c16d5f	257	for _ in 0..bbinfo.get_num_mv() {
cf64af13 KS	258	mvec.push(decode_mv(br, &self.tables.mv_cb)?);
cf64af13 KS	259	}
21c16d5f	260	binfo.set_b_mv(mvec.as_slice());
cf64af13	261	}
cf64af13 KS	262	return Ok(binfo);
	263	}
	264
21c16d5f	265	let bbinfo = decode_b_info(br, self.is_pb, false)?;
cf64af13 KS	266	let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
	267	// if /* !aiv && */(cbpc & 3) != 3 {
	268	cbpy ^= 0xF;
	269	// }
	270	let cbp = (cbpy << 2) \| (cbpc & 3);
	271	if dquant {
	272	let idx = br.read(2)? as usize;
	273	q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
	274	}
	275	let mut binfo = BlockInfo::new(Type::P, cbp, q);
21c16d5f	276	binfo.set_bpart(bbinfo);
cf64af13 KS	277	if !is_4x4 {
cf64af13 KS	278	let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
cf64af13 KS	279	binfo.set_mv(&mvec);
	280	} else {
	281	let mvec: [MV; 4] = [
	282	decode_mv(br, &self.tables.mv_cb)?,
	283	decode_mv(br, &self.tables.mv_cb)?,
	284	decode_mv(br, &self.tables.mv_cb)?,
	285	decode_mv(br, &self.tables.mv_cb)?
	286	];
	287	binfo.set_mv(&mvec);
	288	}
	289	if self.is_pb {
21c16d5f KS	290	let mut mvec: Vec<MV> = Vec::with_capacity(bbinfo.get_num_mv());
21c16d5f KS	291	for _ in 0..bbinfo.get_num_mv() {
cf64af13 KS	292	let mv = decode_mv(br, &self.tables.mv_cb)?;
	293	mvec.push(mv);
	294	}
21c16d5f	295	binfo.set_b_mv(mvec.as_slice());
cf64af13	296	}
cf64af13 KS	297	Ok(binfo)
	298	},
	299	_ => { Err(DecoderError::InvalidData) },
	300	}
	301	}
	302
	303	#[allow(unused_variables)]
21c16d5f KS	304	fn decode_block_intra(&mut self, info: &BlockInfo, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
21c16d5f KS	305	self.decode_block(quant, true, coded, blk)
cf64af13 KS	306	}
	307
	308	#[allow(unused_variables)]
21c16d5f KS	309	fn decode_block_inter(&mut self, info: &BlockInfo, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
21c16d5f KS	310	self.decode_block(quant, false, coded, blk)
cf64af13 KS	311	}
cf64af13 KS	312
cf64af13	313	fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
f2f1afb2 KS	314
	315	fn filter_row(&mut self, buf: &mut NAVideoBuffer<u8>, mb_y: usize, mb_w: usize, cbpi: &CBPInfo) {
	316	let stride = buf.get_stride(0);
	317	let mut off = buf.get_offset(0) + mb_y * 16 * stride;
	318	for mb_x in 0..mb_w {
	319	let coff = off;
	320	let coded0 = cbpi.is_coded(mb_x, 0);
	321	let coded1 = cbpi.is_coded(mb_x, 1);
	322	let q = cbpi.get_q(mb_w + mb_x);
	323	if mb_y != 0 {
	324	if coded0 && cbpi.is_coded_top(mb_x, 0) { deblock_hor(buf, 0, q, coff); }
	325	if coded1 && cbpi.is_coded_top(mb_x, 1) { deblock_hor(buf, 0, q, coff + 8); }
	326	}
	327	let coff = off + 8 * stride;
	328	if cbpi.is_coded(mb_x, 2) && coded0 { deblock_hor(buf, 0, q, coff); }
	329	if cbpi.is_coded(mb_x, 3) && coded1 { deblock_hor(buf, 0, q, coff + 8); }
	330	off += 16;
	331	}
	332	let mut leftt = false;
	333	let mut leftc = false;
	334	let mut off = buf.get_offset(0) + mb_y * 16 * stride;
	335	for mb_x in 0..mb_w {
	336	let ctop0 = cbpi.is_coded_top(mb_x, 0);
	337	let ctop1 = cbpi.is_coded_top(mb_x, 0);
	338	let ccur0 = cbpi.is_coded(mb_x, 0);
	339	let ccur1 = cbpi.is_coded(mb_x, 1);
	340	let q = cbpi.get_q(mb_w + mb_x);
	341	if mb_y != 0 {
	342	let coff = off - 8 * stride;
	343	let qtop = cbpi.get_q(mb_x);
	344	if leftt && ctop0 { deblock_ver(buf, 0, qtop, coff); }
	345	if ctop0 && ctop1 { deblock_ver(buf, 0, qtop, coff + 8); }
	346	}
	347	if leftc && ccur0 { deblock_ver(buf, 0, q, off); }
	348	if ccur0 && ccur1 { deblock_ver(buf, 0, q, off + 8); }
	349	leftt = ctop1;
	350	leftc = ccur1;
	351	off += 16;
	352	}
	353	let strideu = buf.get_stride(1);
	354	let stridev = buf.get_stride(2);
	355	let offu = buf.get_offset(1) + mb_y * 8 * strideu;
	356	let offv = buf.get_offset(2) + mb_y * 8 * stridev;
	357	if mb_y != 0 {
	358	for mb_x in 0..mb_w {
	359	let ctu = cbpi.is_coded_top(mb_x, 4);
	360	let ccu = cbpi.is_coded(mb_x, 4);
	361	let ctv = cbpi.is_coded_top(mb_x, 5);
	362	let ccv = cbpi.is_coded(mb_x, 5);
	363	let q = cbpi.get_q(mb_w + mb_x);
	364	if ctu && ccu { deblock_hor(buf, 1, q, offu + mb_x * 8); }
	365	if ctv && ccv { deblock_hor(buf, 2, q, offv + mb_x * 8); }
	366	}
	367	let mut leftu = false;
	368	let mut leftv = false;
	369	let offu = buf.get_offset(1) + (mb_y - 1) * 8 * strideu;
	370	let offv = buf.get_offset(2) + (mb_y - 1) * 8 * stridev;
	371	for mb_x in 0..mb_w {
	372	let ctu = cbpi.is_coded_top(mb_x, 4);
	373	let ctv = cbpi.is_coded_top(mb_x, 5);
	374	let qt = cbpi.get_q(mb_x);
	375	if leftu && ctu { deblock_ver(buf, 1, qt, offu + mb_x * 8); }
	376	if leftv && ctv { deblock_ver(buf, 2, qt, offv + mb_x * 8); }
	377	leftu = ctu;
378	leftv = ctv;
379	}
380	}
381	}
382	}
383
384	fn deblock_hor(buf: &mut NAVideoBuffer<u8>, comp: usize, q: u8, off: usize) {
385	let stride = buf.get_stride(comp);
386	let mut dptr = buf.get_data_mut();
387	let mut buf = dptr.as_mut_slice();
388	for x in 0..8 {
389	let a = buf[off - 2 * stride + x] as i16;
390	let b = buf[off - 1 * stride + x] as i16;
391	let c = buf[off + 0 * stride + x] as i16;
392	let d = buf[off + 1 * stride + x] as i16;
393	let diff = ((a - d) * 3 + (c - b) * 8) >> 4;
394	if (diff != 0) && (diff >= -32) && (diff < 32) {
395	let d0 = diff.abs() * 2 - (q as i16);
396	let d1 = if d0 < 0 { 0 } else { d0 };
397	let d2 = diff.abs() - d1;
398	let d3 = if d2 < 0 { 0 } else { d2 };
399
400	let delta = if diff < 0 { -d3 } else { d3 };
401
402	let b1 = b + delta;
403	if b1 < 0 { buf[off - 1 * stride + x] = 0; }
404	else if b1 > 255 { buf[off - 1 * stride + x] = 0xFF; }
405	else { buf[off - 1 * stride + x] = b1 as u8; }
406	let c1 = c - delta;
407	if c1 < 0 { buf[off + x] = 0; }
408	else if c1 > 255 { buf[off + x] = 0xFF; }
409	else { buf[off + x] = c1 as u8; }
410	}
411	}
412	}
413
414	fn deblock_ver(buf: &mut NAVideoBuffer<u8>, comp: usize, q: u8, off: usize) {
415	let stride = buf.get_stride(comp);
416	let mut dptr = buf.get_data_mut();
417	let mut buf = dptr.as_mut_slice();
418	for y in 0..8 {
419	let a = buf[off - 2 + y * stride] as i16;
420	let b = buf[off - 1 + y * stride] as i16;
421	let c = buf[off + 0 + y * stride] as i16;
422	let d = buf[off + 1 + y * stride] as i16;
423	let diff = ((a - d) * 3 + (c - b) * 8) >> 4;
424	if (diff != 0) && (diff >= -32) && (diff < 32) {
425	let d0 = diff.abs() * 2 - (q as i16);
426	let d1 = if d0 < 0 { 0 } else { d0 };
427	let d2 = diff.abs() - d1;
428	let d3 = if d2 < 0 { 0 } else { d2 };
429
430	let delta = if diff < 0 { -d3 } else { d3 };
431
432	let b1 = b + delta;
433	if b1 < 0 { buf[off - 1 + y * stride] = 0; }
434	else if b1 > 255 { buf[off - 1 + y * stride] = 0xFF; }
435	else { buf[off - 1 + y * stride] = b1 as u8; }
436	let c1 = c - delta;
437	if c1 < 0 { buf[off + y * stride] = 0; }
438	else if c1 > 255 { buf[off + y * stride] = 0xFF; }
439	else { buf[off + y * stride] = c1 as u8; }
440	}
441	}
cf64af13 KS	442	}
	443
	444	impl Intel263Decoder {
	445	fn new() -> Self {
	446	let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
	447	let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	448	let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
	449	let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	450	let mut coderead = H263ShortCodeReader::new(H263_CBPY);
	451	let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	452	let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
	453	let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	454	let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
	455	let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	456	let mut coderead = H263ShortCodeReader::new(H263_MV);
	457	let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	458	let tables = Tables {
	459	intra_mcbpc_cb: intra_mcbpc_cb,
	460	inter_mcbpc_cb: inter_mcbpc_cb,
	461	cbpy_cb: cbpy_cb,
	462	rl_cb: rl_cb,
	463	aic_rl_cb: aic_rl_cb,
	464	mv_cb: mv_cb,
	465	};
	466
	467	Intel263Decoder{
	468	info: Rc::new(DUMMY_CODEC_INFO),
	469	dec: DCT8x8VideoDecoder::new(),
	470	tables: tables,
	471	}
	472	}
	473	}
	474
	475	impl NADecoder for Intel263Decoder {
	476	fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
	477	if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
	478	let w = vinfo.get_width();
	479	let h = vinfo.get_height();
	480	let fmt = formats::YUV420_FORMAT;
	481	let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
	482	self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
	483	Ok(())
	484	} else {
	485	Err(DecoderError::InvalidData)
	486	}
	487	}
	488	fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
	489	let src = pkt.get_buffer();
	490
	491	if src.len() == 8 {
21c16d5f	492	let bret = self.dec.get_bframe();
cf64af13 KS	493	let buftype;
	494	let is_skip;
	495	if let Ok(btype) = bret {
	496	buftype = btype;
	497	is_skip = false;
	498	} else {
	499	buftype = NABufferType::None;
	500	is_skip = true;
	501	}
	502	let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buftype);
	503	frm.set_keyframe(false);
21c16d5f	504	frm.set_frame_type(if is_skip { FrameType::Skip } else { FrameType::B });
cf64af13 KS	505	return Ok(Rc::new(RefCell::new(frm)));
cf64af13 KS	506	}
cf64af13 KS	507	let mut ibr = Intel263BR::new(&src, &self.tables);
	508
	509	let bufinfo = self.dec.parse_frame(&mut ibr)?;
	510
	511	let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
	512	frm.set_keyframe(self.dec.is_intra());
	513	frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
	514	Ok(Rc::new(RefCell::new(frm)))
	515	}
	516	}
	517
	518
	519	pub fn get_decoder() -> Box<NADecoder> {
	520	Box::new(Intel263Decoder::new())
	521	}
	522
	523	#[cfg(test)]
	524	mod test {
	525	use codecs::*;
	526	use demuxers::*;
	527	use io::byteio::*;
	528
	529	#[test]
	530	fn test_intel263() {
	531	let avi_dmx = find_demuxer("avi").unwrap();
	532	let mut file = File::open("assets/neal73_saber.avi").unwrap();
	533	let mut fr = FileReader::new_read(&mut file);
	534	let mut br = ByteReader::new(&mut fr);
	535	let mut dmx = avi_dmx.new_demuxer(&mut br);
	536	dmx.open().unwrap();
	537
	538	let mut decs: Vec<Option<Box<NADecoder>>> = Vec::new();
	539	for i in 0..dmx.get_num_streams() {
	540	let s = dmx.get_stream(i).unwrap();
	541	let info = s.get_info();
	542	let decfunc = find_decoder(info.get_name());
	543	if let Some(df) = decfunc {
	544	let mut dec = (df)();
	545	dec.init(info).unwrap();
	546	decs.push(Some(dec));
	547	} else {
	548	decs.push(None);
	549	}
	550	}
	551
	552	loop {
	553	let pktres = dmx.get_frame();
	554	if let Err(e) = pktres {
	555	if e == DemuxerError::EOF { break; }
	556	panic!("error");
	557	}
	558	let pkt = pktres.unwrap();
	559	//if pkt.get_pts().unwrap() > 263 { break; }
	560	let streamno = pkt.get_stream().get_id() as usize;
	561	if let Some(ref mut dec) = decs[streamno] {
	562	let frm = dec.decode(&pkt).unwrap();
	563	if pkt.get_stream().get_info().is_video() {
	564	write_pgmyuv("ih263_", streamno, pkt.get_pts().unwrap(), frm);
	565	}
	566	}
	567	}
	568	//panic!("THE END");
	569	}
	570	}