[nihav.git] / src / codecs / h263 / rv20.rs

use io::bitreader::*;
use io::codebook::*;
use formats;
use super::super::*;
use super::*;
use super::code::H263BlockDSP;
use super::decoder::*;
use super::data::*;

#[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>,
}

#[derive(Clone,Copy)]
struct RPRInfo {
    present:    bool,
    bits:       u8,
    widths:     [usize; 8],
    heights:    [usize; 8],
}

struct RealVideo20Decoder {
    info:       Rc<NACodecInfo>,
    dec:        H263BaseDecoder,
    tables:     Tables,
    w:          usize,
    h:          usize,
    minor_ver:  u8,
    rpr:        RPRInfo,
    bdsp:       H263BlockDSP,
}

struct RealVideo20BR<'a> {
    br:         BitReader<'a>,
    tables:     &'a Tables,
    num_slices: usize,
    slice_no:   usize,
    slice_off:  Vec<u32>,
    w:          usize,
    h:          usize,
    mb_w:       usize,
    mb_h:       usize,
    mb_pos_bits: u8,
    minor_ver:  u8,
    rpr:        RPRInfo,
}

struct RV20SliceInfo {
    ftype:  Type,
    qscale: u8,
    mb_x:   usize,
    mb_y:   usize,
    mb_pos: usize,
    w:      usize,
    h:      usize,
}

impl RV20SliceInfo {
    fn new(ftype: Type, qscale: u8, mb_x: usize, mb_y: usize, mb_pos: usize, w: usize, h: usize) -> Self {
        RV20SliceInfo { ftype: ftype, qscale: qscale, mb_x: mb_x, mb_y: mb_y, mb_pos: mb_pos, w: w, h: h }
    }
}

impl<'a> RealVideo20BR<'a> {
    fn new(src: &'a [u8], tables: &'a Tables, width: usize, height: usize, minor_ver: u8, rpr: RPRInfo) -> Self {
        let nslices = (src[0] as usize) + 1;
        let mut slice_offs = Vec::with_capacity(nslices);
        {
            let offs = &src[1..][..nslices * 8];
            let mut br = BitReader::new(offs, offs.len(), BitReaderMode::BE);
            for _ in 0..nslices {
                br.skip(32).unwrap();
                let off = br.read(32).unwrap();
                slice_offs.push(off);
            }
        }
        let soff = nslices * 8 + 1;
        let mb_w = (width  + 15) >> 4;
        let mb_h = (height + 15) >> 4;
        let max_pos = mb_w * mb_h - 1;
        let mut mbpb = 0;
        for i in 0..H263_MBB.len() {
            if max_pos <= H263_MBB[i].blocks {
                mbpb = H263_MBB[i].bits;
                break;
            }
        }
        RealVideo20BR {
            br:         BitReader::new(&src[soff..], src.len() - soff, BitReaderMode::BE),
            tables:     tables,
            num_slices: nslices,
            slice_no:   0,
            slice_off:  slice_offs,
            w:          width,
            h:          height,
            mb_w:       mb_w,
            mb_h:       mb_h,
            mb_pos_bits: mbpb,
            minor_ver:  minor_ver,
            rpr:        rpr,
        }
    }

#[allow(unused_variables)]
    fn decode_block(&mut self, sstate: &SliceState, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64], plane_no: usize, acpred: ACPredMode) -> DecoderResult<()> {
        let mut br = &mut self.br;
        let mut idx = 0;
        if !sstate.is_iframe && intra {
            let mut dc = br.read(8).unwrap() as i16;
            if dc == 255 { dc = 128; }
            blk[0] = dc << 3;
            idx = 1;
        }
        if !coded { return Ok(()); }
        let scan = match acpred {
                    ACPredMode::Hor => H263_SCAN_V,
                    ACPredMode::Ver => H263_SCAN_H,
                    _               => H263_ZIGZAG,
                };

        let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb };
        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).unwrap();
            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().unwrap() { level = -level; }
                if (idx != 0) || !sstate.is_iframe {
                    level = (level * q) + q_add;
                } else {
                    level = level * (H263_DC_SCALES[quant as usize] as i16);
                }
            } else {
                last  = br.read_bool().unwrap();
                run   = br.read(6).unwrap() as u8;
                level = br.read_s(8).unwrap() as i16;
                if level == -128 {
                    let low = br.read(5).unwrap() as i16;
                    let top = br.read_s(6).unwrap() as i16;
                    level = (top << 5) | low;
                }
                if (idx != 0) || !sstate.is_iframe {
                    level = (level * q) + q_add;
                } else {
                    level = level * (H263_DC_SCALES[quant as usize] as i16);
                }
                if level < -2048 { level = -2048; }
                if level >  2047 { level =  2047; }
            }
            idx += run;
            validate!(idx < 64);
            let oidx = scan[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).unwrap() as i16;
    if code == 0 { return Ok(0) }
    if !br.read_bool().unwrap() {
        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).unwrap();
    let yval = decode_mv_component(br, mv_cb).unwrap();
//println!("  MV {},{} @ {}", xval, yval, br.tell());
    Ok(MV::new(xval, yval))
}

impl<'a> BlockDecoder for RealVideo20BR<'a> {

#[allow(unused_variables)]
    fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
        self.slice_no = 0;
println!("decoding picture header size {}", if self.num_slices > 1 { self.slice_off[1] } else { ((self.br.tell() as u32) + (self.br.left() as u32))/8 });
        let shdr = self.read_slice_header().unwrap();
println!("slice ends @ {}\n", self.br.tell());
//        self.slice_no += 1;
        validate!((shdr.mb_x == 0) && (shdr.mb_y == 0));
/*        let mb_count;
        if self.slice_no < self.num_slices {
            let pos = self.br.tell();
            let shdr2 = self.read_slice_header().unwrap();
            self.br.seek(pos as u32)?;
            mb_count = shdr2.mb_pos - shdr.mb_pos;
        } else {
            mb_count = self.mb_w * self.mb_h;
        }*/

        let plusinfo = Some(PlusInfo::new(shdr.ftype == Type::I, false, false, false));
        let picinfo = PicInfo::new(shdr.w, shdr.h, shdr.ftype, false, false, shdr.qscale, 0, None, plusinfo);
        Ok(picinfo)
    }

    #[allow(unused_variables)]
    fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
//println!("read slice {} header", self.slice_no);
        let shdr = self.read_slice_header().unwrap();
        self.slice_no += 1;
        let mb_count;
        if self.slice_no < self.num_slices {
            let pos = self.br.tell();
            let shdr2 = self.read_slice_header().unwrap();
            mb_count = shdr2.mb_pos - shdr.mb_pos;
            self.br.seek(pos as u32)?;
        } else {
            mb_count = self.mb_w * self.mb_h - shdr.mb_pos;
        }
        let ret = SliceInfo::new(shdr.mb_x, shdr.mb_y, shdr.mb_pos + mb_count, shdr.qscale);

        Ok(ret)
    }

    fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> 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).unwrap();
                    while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb).unwrap(); }
                    let mut acpred = ACPredMode::None;
                    if let Some(ref pi) = info.plusinfo {
                        if pi.aic {
                            let acpp = br.read_bool()?;
                            acpred = ACPredMode::DC;
                            println!("   acp {} @ {}", acpp as u8, br.tell());
                            if acpp {
                                acpred = if br.read_bool()? { ACPredMode::Hor } else { ACPredMode::Ver };
                            }
                        }
println!("   @ {}", br.tell());
                    }
                    let cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
                    let cbp = (cbpy << 2) | (cbpc & 3);
                    let dquant = (cbpc & 4) != 0;
                    if dquant {
                        let idx = br.read(2).unwrap() as usize;
                        q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
                    }
println!(" MB {},{} CBP {:X} @ {}", sstate.mb_x, sstate.mb_y, cbp, br.tell());
                    let mut binfo = BlockInfo::new(Type::I, cbp, q);
                    binfo.set_acpred(acpred);
                    Ok(binfo)
                },
            Type::P => {
                    if br.read_bool().unwrap() {
                        return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant()));
                    }
                    let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb).unwrap();
                    while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb).unwrap(); }
                    let is_intra = (cbpc & 0x04) != 0;
                    let dquant   = (cbpc & 0x08) != 0;
                    let is_4x4   = (cbpc & 0x10) != 0;
                    if is_intra {
                        let cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
                        let cbp = (cbpy << 2) | (cbpc & 3);
                        if dquant {
                            let idx = br.read(2).unwrap() as usize;
                            q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
                        }
                        let binfo = BlockInfo::new(Type::I, cbp, q);
                        return Ok(binfo);
                    }

                    let mut cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
//                    if /* !aiv && */(cbpc & 3) != 3 {
                        cbpy ^= 0xF;
//                    }
                    let cbp = (cbpy << 2) | (cbpc & 3);
                    if dquant {
                        let idx = br.read(2).unwrap() as usize;
                        q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
                    }
println!(" MB {}.{} cbp = {:X}", sstate.mb_x, sstate.mb_y, cbp);
                    let mut binfo = BlockInfo::new(Type::P, cbp, q);
                    if !is_4x4 {
                        let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb).unwrap()];
                        binfo.set_mv(&mvec);
                    } else {
                        let mvec: [MV; 4] = [
                                decode_mv(br, &self.tables.mv_cb).unwrap(),
                                decode_mv(br, &self.tables.mv_cb).unwrap(),
                                decode_mv(br, &self.tables.mv_cb).unwrap(),
                                decode_mv(br, &self.tables.mv_cb).unwrap()
                            ];
                        binfo.set_mv(&mvec);
                    }
                    Ok(binfo)
                },
            _ => { println!("wrong info mode"); Err(DecoderError::InvalidData) },
        }
    }

    fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
        self.decode_block(sstate, quant, true, coded, blk, if no < 4 { 0 } else { no - 3 }, info.get_acpred())
    }

    #[allow(unused_variables)]
    fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
        self.decode_block(sstate, quant, false, coded, blk, if no < 4 { 0 } else { no - 3 }, ACPredMode::None)
    }

    fn is_slice_end(&mut self) -> bool { false }

    fn is_gob(&mut self) -> bool { false }
}

impl<'a> RealVideo20BR<'a> {
#[allow(unused_variables)]
    fn read_slice_header(&mut self) -> DecoderResult<RV20SliceInfo> {
        validate!(self.slice_no < self.num_slices);

        let mut br = &mut self.br;
        br.seek(self.slice_off[self.slice_no] * 8).unwrap();
//println!(" slice at off {}", br.tell());

        let frm_type    = br.read(2).unwrap();
        let ftype = match frm_type {
                0 | 1 => { Type::I },
                2     => { Type::P },
                _     => { Type::Skip },
            };

        let marker      = br.read(1).unwrap();
        validate!(marker == 0);
        let qscale      = br.read(5).unwrap() as u8;
        validate!(qscale > 0);
        if self.minor_ver >= 2 {
            br.skip(1).unwrap(); // loop filter
        }
        let seq = if self.minor_ver <= 1 {
                br.read(8).unwrap()  << 7
            } else {
                br.read(13).unwrap() << 2
            };
        let w;
        let h;
        if self.rpr.present {
            let rpr = br.read(self.rpr.bits).unwrap() as usize;
            if rpr == 0 {
                w = self.w;
                h = self.h;
            } else {
                w = self.rpr.widths[rpr];
                h = self.rpr.heights[rpr];
                validate!((w != 0) && (h != 0));
            }
        } else {
            w = self.w;
            h = self.h;
        }

        let mb_pos = br.read(self.mb_pos_bits).unwrap() as usize;
        let mb_x = mb_pos % self.mb_w;
        let mb_y = mb_pos / self.mb_w;

        br.skip(1).unwrap(); // no rounding

        if (self.minor_ver <= 1) && (frm_type == 3) {
            br.skip(5).unwrap();
        }
println!("slice q {} mb {},{}", qscale, mb_x, mb_y);

        Ok(RV20SliceInfo::new(ftype, qscale, mb_x, mb_y, mb_pos, w, h))
    }
}

impl RealVideo20Decoder {
    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,
        };

        RealVideo20Decoder{
            info:           Rc::new(DUMMY_CODEC_INFO),
            dec:            H263BaseDecoder::new(),
            tables:         tables,
            w:              0,
            h:              0,
            minor_ver:      0,
            rpr:            RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] },
            bdsp:           H263BlockDSP::new(),
        }
    }
}

impl NADecoder for RealVideo20Decoder {
#[allow(unused_variables)]
    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()));
            self.w = w;
            self.h = h;

            let edata = info.get_extradata().unwrap();
            let src: &[u8] = &edata;
            let ver = ((src[4] as u32) << 12) | ((src[5] as u32) << 4) | ((src[6] as u32) >> 4);
            let maj_ver = ver >> 16;
            let min_ver = (ver >> 8) & 0xFF;
            let mic_ver = ver & 0xFF;
println!("ver {:06X}", ver);
            validate!(maj_ver == 2);
            self.minor_ver = min_ver as u8;
            let rprb = src[1] & 7;
            if rprb == 0 {
                self.rpr.present = false;
            } else {
                self.rpr.present = true;
                self.rpr.bits    = rprb as u8;
                for i in 4..(src.len()/2) {
                    self.rpr.widths [i - 4] = (src[i * 2]     as usize) * 4;
                    self.rpr.heights[i - 4] = (src[i * 2 + 1] as usize) * 4;
                }
            }
            Ok(())
        } else {
println!(".unwrap().unwrap().unwrap()");
            Err(DecoderError::InvalidData)
        }
    }
    fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
        let src = pkt.get_buffer();

println!(" decode frame size {}, {} slices", src.len(), src[0]+1);
        let mut ibr = RealVideo20BR::new(&src, &self.tables, self.w, self.h, self.minor_ver, self.rpr);

        let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp).unwrap();

        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)))
    }
}

struct MBB { blocks: usize, bits: u8 }
const H263_MBB: &[MBB; 7] = &[
    MBB{ blocks:    47, bits:  6 },
    MBB{ blocks:    98, bits:  7 },
    MBB{ blocks:   395, bits:  9 },
    MBB{ blocks:  1583, bits: 11 },
    MBB{ blocks:  6335, bits: 13 },
    MBB{ blocks:  9215, bits: 14 },
    MBB{ blocks: 65536, bits: 14 },
];

pub fn get_decoder() -> Box<NADecoder> {
    Box::new(RealVideo20Decoder::new())
}

#[cfg(test)]
mod test {
    use test::dec_video::test_file_decoding;
    #[test]
    fn test_rv20() {
        test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /*None*/Some(1000), true, false, Some("rv20"));
    }
}
Commit	Line	Data
be91b1c3 KS	1	use io::bitreader::*;
	2	use io::codebook::*;
	3	use formats;
	4	use super::super::*;
	5	use super::*;
2a2aa421	6	use super::code::H263BlockDSP;
be91b1c3 KS	7	use super::decoder::*;
	8	use super::data::*;
	9
	10	#[allow(dead_code)]
	11	struct Tables {
	12	intra_mcbpc_cb: Codebook<u8>,
	13	inter_mcbpc_cb: Codebook<u8>,
	14	cbpy_cb: Codebook<u8>,
	15	rl_cb: Codebook<H263RLSym>,
	16	aic_rl_cb: Codebook<H263RLSym>,
	17	mv_cb: Codebook<u8>,
	18	}
	19
	20	#[derive(Clone,Copy)]
	21	struct RPRInfo {
	22	present: bool,
	23	bits: u8,
	24	widths: [usize; 8],
	25	heights: [usize; 8],
	26	}
	27
	28	struct RealVideo20Decoder {
	29	info: Rc<NACodecInfo>,
	30	dec: H263BaseDecoder,
	31	tables: Tables,
	32	w: usize,
	33	h: usize,
	34	minor_ver: u8,
	35	rpr: RPRInfo,
2a2aa421	36	bdsp: H263BlockDSP,
be91b1c3 KS	37	}
	38
	39	struct RealVideo20BR<'a> {
	40	br: BitReader<'a>,
	41	tables: &'a Tables,
	42	num_slices: usize,
	43	slice_no: usize,
	44	slice_off: Vec<u32>,
	45	w: usize,
	46	h: usize,
	47	mb_w: usize,
	48	mb_h: usize,
be91b1c3	49	mb_pos_bits: u8,
be91b1c3 KS	50	minor_ver: u8,
be91b1c3 KS	51	rpr: RPRInfo,
be91b1c3 KS	52	}
	53
	54	struct RV20SliceInfo {
	55	ftype: Type,
	56	qscale: u8,
	57	mb_x: usize,
	58	mb_y: usize,
	59	mb_pos: usize,
	60	w: usize,
	61	h: usize,
	62	}
	63
	64	impl RV20SliceInfo {
	65	fn new(ftype: Type, qscale: u8, mb_x: usize, mb_y: usize, mb_pos: usize, w: usize, h: usize) -> Self {
	66	RV20SliceInfo { ftype: ftype, qscale: qscale, mb_x: mb_x, mb_y: mb_y, mb_pos: mb_pos, w: w, h: h }
	67	}
	68	}
	69
	70	impl<'a> RealVideo20BR<'a> {
	71	fn new(src: &'a [u8], tables: &'a Tables, width: usize, height: usize, minor_ver: u8, rpr: RPRInfo) -> Self {
	72	let nslices = (src[0] as usize) + 1;
	73	let mut slice_offs = Vec::with_capacity(nslices);
	74	{
	75	let offs = &src[1..][..nslices * 8];
	76	let mut br = BitReader::new(offs, offs.len(), BitReaderMode::BE);
	77	for _ in 0..nslices {
	78	br.skip(32).unwrap();
	79	let off = br.read(32).unwrap();
	80	slice_offs.push(off);
	81	}
	82	}
	83	let soff = nslices * 8 + 1;
	84	let mb_w = (width + 15) >> 4;
	85	let mb_h = (height + 15) >> 4;
	86	let max_pos = mb_w * mb_h - 1;
	87	let mut mbpb = 0;
	88	for i in 0..H263_MBB.len() {
	89	if max_pos <= H263_MBB[i].blocks {
	90	mbpb = H263_MBB[i].bits;
	91	break;
	92	}
	93	}
	94	RealVideo20BR {
	95	br: BitReader::new(&src[soff..], src.len() - soff, BitReaderMode::BE),
	96	tables: tables,
	97	num_slices: nslices,
	98	slice_no: 0,
	99	slice_off: slice_offs,
	100	w: width,
	101	h: height,
	102	mb_w: mb_w,
	103	mb_h: mb_h,
	104	mb_pos_bits: mbpb,
be91b1c3 KS	105	minor_ver: minor_ver,
be91b1c3 KS	106	rpr: rpr,
be91b1c3 KS	107	}
	108	}
	109
2a2aa421	110	#[allow(unused_variables)]
0c3b4923	111	fn decode_block(&mut self, sstate: &SliceState, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64], plane_no: usize, acpred: ACPredMode) -> DecoderResult<()> {
be91b1c3 KS	112	let mut br = &mut self.br;
be91b1c3 KS	113	let mut idx = 0;
2a2aa421	114	if !sstate.is_iframe && intra {
be91b1c3 KS	115	let mut dc = br.read(8).unwrap() as i16;
	116	if dc == 255 { dc = 128; }
	117	blk[0] = dc << 3;
	118	idx = 1;
	119	}
	120	if !coded { return Ok(()); }
0c3b4923 KS	121	let scan = match acpred {
	122	ACPredMode::Hor => H263_SCAN_V,
	123	ACPredMode::Ver => H263_SCAN_H,
	124	_ => H263_ZIGZAG,
	125	};
be91b1c3	126
2a2aa421	127	let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb };
be91b1c3 KS	128	let q_add = if quant == 0 { 0i16 } else { ((quant - 1) \| 1) as i16 };
	129	let q = (quant * 2) as i16;
	130	while idx < 64 {
	131	let code = br.read_cb(rl_cb).unwrap();
	132	let run;
	133	let mut level;
	134	let last;
	135	if !code.is_escape() {
	136	run = code.get_run();
	137	level = code.get_level();
	138	last = code.is_last();
	139	if br.read_bool().unwrap() { level = -level; }
de919937 KS	140	if (idx != 0) \|\| !sstate.is_iframe {
	141	level = (level * q) + q_add;
	142	} else {
	143	level = level * (H263_DC_SCALES[quant as usize] as i16);
	144	}
be91b1c3 KS	145	} else {
	146	last = br.read_bool().unwrap();
	147	run = br.read(6).unwrap() as u8;
	148	level = br.read_s(8).unwrap() as i16;
	149	if level == -128 {
	150	let low = br.read(5).unwrap() as i16;
	151	let top = br.read_s(6).unwrap() as i16;
	152	level = (top << 5) \| low;
	153	}
de919937 KS	154	if (idx != 0) \|\| !sstate.is_iframe {
	155	level = (level * q) + q_add;
	156	} else {
	157	level = level * (H263_DC_SCALES[quant as usize] as i16);
	158	}
be91b1c3 KS	159	if level < -2048 { level = -2048; }
	160	if level > 2047 { level = 2047; }
	161	}
	162	idx += run;
	163	validate!(idx < 64);
0c3b4923	164	let oidx = scan[idx as usize];
be91b1c3 KS	165	blk[oidx] = level;
	166	idx += 1;
	167	if last { break; }
	168	}
	169	Ok(())
	170	}
	171	}
	172
	173	fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
	174	let code = br.read_cb(mv_cb).unwrap() as i16;
	175	if code == 0 { return Ok(0) }
	176	if !br.read_bool().unwrap() {
	177	Ok(code)
	178	} else {
	179	Ok(-code)
	180	}
	181	}
	182
	183	fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
	184	let xval = decode_mv_component(br, mv_cb).unwrap();
	185	let yval = decode_mv_component(br, mv_cb).unwrap();
	186	//println!(" MV {},{} @ {}", xval, yval, br.tell());
	187	Ok(MV::new(xval, yval))
	188	}
	189
	190	impl<'a> BlockDecoder for RealVideo20BR<'a> {
	191
	192	#[allow(unused_variables)]
	193	fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
	194	self.slice_no = 0;
	195	println!("decoding picture header size {}", if self.num_slices > 1 { self.slice_off[1] } else { ((self.br.tell() as u32) + (self.br.left() as u32))/8 });
be91b1c3 KS	196	let shdr = self.read_slice_header().unwrap();
be91b1c3 KS	197	println!("slice ends @ {}\n", self.br.tell());
2a2aa421	198	// self.slice_no += 1;
be91b1c3	199	validate!((shdr.mb_x == 0) && (shdr.mb_y == 0));
2a2aa421	200	/* let mb_count;
be91b1c3 KS	201	if self.slice_no < self.num_slices {
	202	let pos = self.br.tell();
	203	let shdr2 = self.read_slice_header().unwrap();
	204	self.br.seek(pos as u32)?;
	205	mb_count = shdr2.mb_pos - shdr.mb_pos;
	206	} else {
	207	mb_count = self.mb_w * self.mb_h;
2a2aa421	208	}*/
be91b1c3	209
0c3b4923 KS	210	let plusinfo = Some(PlusInfo::new(shdr.ftype == Type::I, false, false, false));
0c3b4923 KS	211	let picinfo = PicInfo::new(shdr.w, shdr.h, shdr.ftype, false, false, shdr.qscale, 0, None, plusinfo);
be91b1c3 KS	212	Ok(picinfo)
	213	}
	214
	215	#[allow(unused_variables)]
2a2aa421	216	fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
be91b1c3 KS	217	//println!("read slice {} header", self.slice_no);
	218	let shdr = self.read_slice_header().unwrap();
	219	self.slice_no += 1;
	220	let mb_count;
	221	if self.slice_no < self.num_slices {
0c3b4923	222	let pos = self.br.tell();
be91b1c3 KS	223	let shdr2 = self.read_slice_header().unwrap();
be91b1c3 KS	224	mb_count = shdr2.mb_pos - shdr.mb_pos;
0c3b4923	225	self.br.seek(pos as u32)?;
be91b1c3 KS	226	} else {
	227	mb_count = self.mb_w * self.mb_h - shdr.mb_pos;
	228	}
2a2aa421	229	let ret = SliceInfo::new(shdr.mb_x, shdr.mb_y, shdr.mb_pos + mb_count, shdr.qscale);
be91b1c3 KS	230
	231	Ok(ret)
	232	}
	233
2a2aa421	234	fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
be91b1c3 KS	235	let mut br = &mut self.br;
	236	let mut q = slice.get_quant();
	237	match info.get_mode() {
	238	Type::I => {
	239	let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb).unwrap();
	240	while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb).unwrap(); }
0c3b4923 KS	241	let mut acpred = ACPredMode::None;
	242	if let Some(ref pi) = info.plusinfo {
	243	if pi.aic {
	244	let acpp = br.read_bool()?;
	245	acpred = ACPredMode::DC;
	246	println!(" acp {} @ {}", acpp as u8, br.tell());
	247	if acpp {
	248	acpred = if br.read_bool()? { ACPredMode::Hor } else { ACPredMode::Ver };
	249	}
	250	}
	251	println!(" @ {}", br.tell());
	252	}
be91b1c3 KS	253	let cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
	254	let cbp = (cbpy << 2) \| (cbpc & 3);
	255	let dquant = (cbpc & 4) != 0;
	256	if dquant {
	257	let idx = br.read(2).unwrap() as usize;
	258	q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
	259	}
2a2aa421	260	println!(" MB {},{} CBP {:X} @ {}", sstate.mb_x, sstate.mb_y, cbp, br.tell());
0c3b4923 KS	261	let mut binfo = BlockInfo::new(Type::I, cbp, q);
	262	binfo.set_acpred(acpred);
	263	Ok(binfo)
be91b1c3 KS	264	},
	265	Type::P => {
	266	if br.read_bool().unwrap() {
be91b1c3 KS	267	return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant()));
	268	}
	269	let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb).unwrap();
	270	while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb).unwrap(); }
	271	let is_intra = (cbpc & 0x04) != 0;
	272	let dquant = (cbpc & 0x08) != 0;
	273	let is_4x4 = (cbpc & 0x10) != 0;
	274	if is_intra {
	275	let cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
	276	let cbp = (cbpy << 2) \| (cbpc & 3);
	277	if dquant {
	278	let idx = br.read(2).unwrap() as usize;
	279	q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
	280	}
	281	let binfo = BlockInfo::new(Type::I, cbp, q);
be91b1c3 KS	282	return Ok(binfo);
	283	}
	284
	285	let mut cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
	286	// if /* !aiv && */(cbpc & 3) != 3 {
	287	cbpy ^= 0xF;
	288	// }
	289	let cbp = (cbpy << 2) \| (cbpc & 3);
	290	if dquant {
	291	let idx = br.read(2).unwrap() as usize;
	292	q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
	293	}
2a2aa421	294	println!(" MB {}.{} cbp = {:X}", sstate.mb_x, sstate.mb_y, cbp);
be91b1c3 KS	295	let mut binfo = BlockInfo::new(Type::P, cbp, q);
	296	if !is_4x4 {
	297	let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb).unwrap()];
	298	binfo.set_mv(&mvec);
	299	} else {
	300	let mvec: [MV; 4] = [
	301	decode_mv(br, &self.tables.mv_cb).unwrap(),
	302	decode_mv(br, &self.tables.mv_cb).unwrap(),
	303	decode_mv(br, &self.tables.mv_cb).unwrap(),
	304	decode_mv(br, &self.tables.mv_cb).unwrap()
	305	];
	306	binfo.set_mv(&mvec);
	307	}
be91b1c3 KS	308	Ok(binfo)
	309	},
	310	_ => { println!("wrong info mode"); Err(DecoderError::InvalidData) },
	311	}
	312	}
	313
2a2aa421	314	fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
0c3b4923	315	self.decode_block(sstate, quant, true, coded, blk, if no < 4 { 0 } else { no - 3 }, info.get_acpred())
be91b1c3 KS	316	}
	317
	318	#[allow(unused_variables)]
2a2aa421	319	fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
0c3b4923	320	self.decode_block(sstate, quant, false, coded, blk, if no < 4 { 0 } else { no - 3 }, ACPredMode::None)
be91b1c3 KS	321	}
be91b1c3 KS	322
2a2aa421	323	fn is_slice_end(&mut self) -> bool { false }
be91b1c3	324
2a2aa421	325	fn is_gob(&mut self) -> bool { false }
be91b1c3 KS	326	}
	327
	328	impl<'a> RealVideo20BR<'a> {
2a2aa421	329	#[allow(unused_variables)]
be91b1c3 KS	330	fn read_slice_header(&mut self) -> DecoderResult<RV20SliceInfo> {
	331	validate!(self.slice_no < self.num_slices);
	332
	333	let mut br = &mut self.br;
	334	br.seek(self.slice_off[self.slice_no] * 8).unwrap();
	335	//println!(" slice at off {}", br.tell());
	336
	337	let frm_type = br.read(2).unwrap();
	338	let ftype = match frm_type {
	339	0 \| 1 => { Type::I },
	340	2 => { Type::P },
	341	_ => { Type::Skip },
	342	};
	343
	344	let marker = br.read(1).unwrap();
	345	validate!(marker == 0);
	346	let qscale = br.read(5).unwrap() as u8;
	347	validate!(qscale > 0);
	348	if self.minor_ver >= 2 {
	349	br.skip(1).unwrap(); // loop filter
	350	}
	351	let seq = if self.minor_ver <= 1 {
	352	br.read(8).unwrap() << 7
	353	} else {
	354	br.read(13).unwrap() << 2
	355	};
	356	let w;
	357	let h;
	358	if self.rpr.present {
	359	let rpr = br.read(self.rpr.bits).unwrap() as usize;
	360	if rpr == 0 {
	361	w = self.w;
	362	h = self.h;
	363	} else {
	364	w = self.rpr.widths[rpr];
	365	h = self.rpr.heights[rpr];
	366	validate!((w != 0) && (h != 0));
	367	}
	368	} else {
	369	w = self.w;
	370	h = self.h;
	371	}
	372
	373	let mb_pos = br.read(self.mb_pos_bits).unwrap() as usize;
	374	let mb_x = mb_pos % self.mb_w;
	375	let mb_y = mb_pos / self.mb_w;
	376
	377	br.skip(1).unwrap(); // no rounding
	378
	379	if (self.minor_ver <= 1) && (frm_type == 3) {
	380	br.skip(5).unwrap();
	381	}
	382	println!("slice q {} mb {},{}", qscale, mb_x, mb_y);
	383
	384	Ok(RV20SliceInfo::new(ftype, qscale, mb_x, mb_y, mb_pos, w, h))
	385	}
	386	}
	387
be91b1c3 KS	388	impl RealVideo20Decoder {
	389	fn new() -> Self {
	390	let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
	391	let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	392	let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
	393	let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	394	let mut coderead = H263ShortCodeReader::new(H263_CBPY);
	395	let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	396	let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
	397	let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	398	let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
	399	let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	400	let mut coderead = H263ShortCodeReader::new(H263_MV);
	401	let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	402
	403	let tables = Tables {
	404	intra_mcbpc_cb: intra_mcbpc_cb,
	405	inter_mcbpc_cb: inter_mcbpc_cb,
	406	cbpy_cb: cbpy_cb,
	407	rl_cb: rl_cb,
	408	aic_rl_cb: aic_rl_cb,
	409	mv_cb: mv_cb,
	410	};
	411
	412	RealVideo20Decoder{
	413	info: Rc::new(DUMMY_CODEC_INFO),
	414	dec: H263BaseDecoder::new(),
	415	tables: tables,
	416	w: 0,
	417	h: 0,
	418	minor_ver: 0,
	419	rpr: RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] },
2a2aa421	420	bdsp: H263BlockDSP::new(),
be91b1c3 KS	421	}
	422	}
	423	}
	424
	425	impl NADecoder for RealVideo20Decoder {
2a2aa421	426	#[allow(unused_variables)]
be91b1c3 KS	427	fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
	428	if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
	429	let w = vinfo.get_width();
	430	let h = vinfo.get_height();
	431	let fmt = formats::YUV420_FORMAT;
	432	let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
	433	self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
	434	self.w = w;
	435	self.h = h;
	436
	437	let edata = info.get_extradata().unwrap();
	438	let src: &[u8] = &edata;
	439	let ver = ((src[4] as u32) << 12) \| ((src[5] as u32) << 4) \| ((src[6] as u32) >> 4);
	440	let maj_ver = ver >> 16;
	441	let min_ver = (ver >> 8) & 0xFF;
	442	let mic_ver = ver & 0xFF;
	443	println!("ver {:06X}", ver);
	444	validate!(maj_ver == 2);
	445	self.minor_ver = min_ver as u8;
	446	let rprb = src[1] & 7;
	447	if rprb == 0 {
	448	self.rpr.present = false;
	449	} else {
	450	self.rpr.present = true;
	451	self.rpr.bits = rprb as u8;
	452	for i in 4..(src.len()/2) {
	453	self.rpr.widths [i - 4] = (src[i * 2] as usize) * 4;
	454	self.rpr.heights[i - 4] = (src[i * 2 + 1] as usize) * 4;
	455	}
	456	}
	457	Ok(())
	458	} else {
	459	println!(".unwrap().unwrap().unwrap()");
	460	Err(DecoderError::InvalidData)
	461	}
	462	}
	463	fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
	464	let src = pkt.get_buffer();
	465
	466	println!(" decode frame size {}, {} slices", src.len(), src[0]+1);
	467	let mut ibr = RealVideo20BR::new(&src, &self.tables, self.w, self.h, self.minor_ver, self.rpr);
	468
2a2aa421	469	let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp).unwrap();
be91b1c3 KS	470
	471	let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
	472	frm.set_keyframe(self.dec.is_intra());
	473	frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
	474	Ok(Rc::new(RefCell::new(frm)))
	475	}
	476	}
	477
	478	struct MBB { blocks: usize, bits: u8 }
	479	const H263_MBB: &[MBB; 7] = &[
	480	MBB{ blocks: 47, bits: 6 },
	481	MBB{ blocks: 98, bits: 7 },
	482	MBB{ blocks: 395, bits: 9 },
	483	MBB{ blocks: 1583, bits: 11 },
	484	MBB{ blocks: 6335, bits: 13 },
	485	MBB{ blocks: 9215, bits: 14 },
	486	MBB{ blocks: 65536, bits: 14 },
	487	];
	488
	489	pub fn get_decoder() -> Box<NADecoder> {
	490	Box::new(RealVideo20Decoder::new())
	491	}
	492
	493	#[cfg(test)]
	494	mod test {
	495	use test::dec_video::test_file_decoding;
	496	#[test]
	497	fn test_rv20() {
de919937	498	test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /None/Some(1000), true, false, Some("rv20"));
be91b1c3 KS	499	}
be91b1c3 KS	500	}