[nihav.git] / nihav-realmedia / src / codecs / rv20.rs

use nihav_core::io::bitreader::*;
use nihav_core::io::codebook::*;
use nihav_core::formats;
use nihav_core::frame::*;
use nihav_core::codecs::*;
use nihav_codec_support::codecs::{MV, ZIGZAG};
use nihav_codec_support::codecs::h263::*;
use nihav_codec_support::codecs::h263::code::H263BlockDSP;
use nihav_codec_support::codecs::h263::decoder::*;
use nihav_codec_support::codecs::h263::data::*;


#[allow(dead_code)]
struct Tables {
    intra_mcbpc_cb: Codebook<u8>,
    inter_mcbpc_cb: Codebook<u8>,
    mbtype_b_cb:    Codebook<u8>,
    cbpy_cb:        Codebook<u8>,
    cbpc_b_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:       NACodecInfoRef,
    dec:        H263BaseDecoder,
    tables:     Tables,
    w:          usize,
    h:          usize,
    minor_ver:  u8,
    rpr:        RPRInfo,
    bdsp:       H263BlockDSP,
    base_ts:    u64,
    last_ts:    u16,
    next_ts:    u16,
}

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,
    pts:        u16,
}

struct RV20SliceInfo {
    ftype:  Type,
    seq:    u32,
    qscale: u8,
    mb_x:   usize,
    mb_y:   usize,
    mb_pos: usize,
    w:      usize,
    h:      usize,
}

impl RV20SliceInfo {
    fn new(ftype: Type, seq: u32, qscale: u8, mb_x: usize, mb_y: usize, mb_pos: usize, w: usize, h: usize) -> Self {
        RV20SliceInfo { ftype, seq, qscale, mb_x, mb_y, mb_pos, w, 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, 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..], BitReaderMode::BE),
            tables,
            num_slices: nslices,
            slice_no:   0,
            slice_off:  slice_offs,
            w:          width,
            h:          height,
            mb_w,
            mb_h,
            mb_pos_bits: mbpb,
            minor_ver,
            rpr,
            pts:        0,
        }
    }

#[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 br = &mut self.br;
        let mut idx = 0;
        if !sstate.is_iframe && intra {
            let mut dc = br.read(8)? 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,
                    _               => &ZIGZAG,
                };

        let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb };
        let q_add = if quant == 0 || sstate.is_iframe { 0i16 } else { ((quant - 1) | 1) as i16 };
        let q = if plane_no == 0 { (quant * 2) as i16 } else { H263_CHROMA_QUANT[quant as usize] 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 = 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)? 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 read_dquant(br: &mut BitReader, q: u8) -> DecoderResult<u8> {
    if br.read_bool()? {
        Ok(H263_MODIFIED_QUANT[br.read(1)? as usize][q as usize])
    } else {
        Ok(br.read(5)? as u8)
    }
}

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

#[allow(unused_variables)]
    fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
        self.slice_no = 0;
        let shdr = self.read_slice_header()?;
//        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()?;
            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, MVMode::Long, false, false, shdr.qscale, shdr.seq as u16, None, plusinfo);
        Ok(picinfo)
    }

    #[allow(unused_variables)]
    fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
        let shdr = self.read_slice_header()?;
        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()?;
            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 br = &mut self.br;
        let mut q = sstate.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 mut acpred = ACPredMode::None;
                    if let Some(ref pi) = info.plusinfo {
                        if pi.aic {
                            let acpp = br.read_bool()?;
                            acpred = ACPredMode::DC;
                            if acpp {
                                acpred = if br.read_bool()? { ACPredMode::Hor } else { ACPredMode::Ver };
                            }
                        }
                    }
                    let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
                    let cbp = (cbpy << 2) | (cbpc & 3);
                    let dquant = (cbpc & 4) != 0;
                    if dquant {
                        q = read_dquant(br, q)?;
                    }
                    let mut binfo = BlockInfo::new(Type::I, cbp, q);
                    binfo.set_acpred(acpred);
                    Ok(binfo)
                },
            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 cbpy = br.read_cb(&self.tables.cbpy_cb)?;
                        let cbp = (cbpy << 2) | (cbpc & 3);
                        if dquant {
                            q = read_dquant(br, q)?;
                        }
                        let binfo = BlockInfo::new(Type::I, cbp, q);
                        return Ok(binfo);
                    }

                    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 {
                        q = read_dquant(br, q)?;
                    }
                    let mut binfo = BlockInfo::new(Type::P, cbp, q);
                    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);
                    }
                    Ok(binfo)
                },
            Type::B => { // B
                    let mut mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize;
                    while mbtype == 14 { mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize; }

                    let is_coded  = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_CODED) != 0;
                    let is_intra  = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_INTRA) != 0;
                    let dquant    = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_DQUANT) != 0;
                    let is_fwd    = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_FORWARD) != 0;
                    let is_bwd    = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_BACKWARD) != 0;

                    let cbp = if is_coded {
                            let cbpc = br.read_cb(&self.tables.cbpc_b_cb)?;
                            let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
                            if !is_intra { cbpy ^= 0xF; }
                            (cbpy << 2) | (cbpc & 3)
                        } else { 0 };

                    if dquant {
                        q = read_dquant(br, q)?;
                    }

                    if is_intra {
                        let binfo = BlockInfo::new(Type::I, cbp, q);
                        return Ok(binfo);
                    }

                    let mut binfo = BlockInfo::new(Type::B, cbp, q);
                    if is_fwd {
                        let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
                        binfo.set_mv(&mvec);
                    }
                    if is_bwd {
                        let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
                        binfo.set_b_mv(&mvec);
                    }
                    Ok(binfo)
                },
            _ => { unreachable!(); },
        }
    }

    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 }
}

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

        let br = &mut self.br;
        br.seek(self.slice_off[self.slice_no] * 8)?;

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

        let marker      = br.read(1)?;
        validate!(marker == 0);
        let qscale      = br.read(5)? as u8;
        validate!(qscale > 0);
        if self.minor_ver >= 2 {
            br.skip(1)?; // loop filter
        }
        let seq = if self.minor_ver <= 1 {
                br.read(8)?  << 8
            } else {
                br.read(13)? << 3
            };
        self.pts = seq as u16;
        let w;
        let h;
        if self.rpr.present {
            let rpr = br.read(self.rpr.bits)? as usize;
            if rpr == 0 {
                w = self.w;
                h = self.h;
            } else {
                w = self.rpr.widths[rpr - 1];
                h = self.rpr.heights[rpr - 1];
                validate!((w != 0) && (h != 0));
            }
        } else {
            w = self.w;
            h = self.h;
        }

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

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

        if (self.minor_ver <= 1) && (frm_type == 3) {
            br.skip(5)?;
        }

        Ok(RV20SliceInfo::new(ftype, seq, 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_MBTYPE_B);
        let mbtype_b_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 = H263ShortCodeReader::new(H263_CBPC_B);
        let cbpc_b_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,
            inter_mcbpc_cb,
            mbtype_b_cb,
            cbpy_cb,
            cbpc_b_cb,
            rl_cb,
            aic_rl_cb,
            mv_cb,
        };

        RealVideo20Decoder{
            info:           NACodecInfoRef::default(),
            dec:            H263BaseDecoder::new_b_frames(false),
            tables,
            w:              0,
            h:              0,
            minor_ver:      0,
            rpr:            RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] },
            bdsp:           H263BlockDSP::new(),
            base_ts:        0,
            last_ts:        0,
            next_ts:        0,
        }
    }
}

impl NADecoder for RealVideo20Decoder {
#[allow(unused_variables)]
    fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> 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 = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
            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;
            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 >> 1) + 1) 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 {
            Err(DecoderError::InvalidData)
        }
    }
    fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
        let src = pkt.get_buffer();

        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)?;

        let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
        let ftype = self.dec.get_frame_type();
        let pts = ibr.pts;
        if ftype != FrameType::B {
            self.last_ts = self.next_ts;
            self.next_ts = pts;
            if self.last_ts > self.next_ts {
                self.base_ts += 1 << 16;
            }
        }
        let ts_diff = self.next_ts.wrapping_sub(pts);
        let ts = self.base_ts + (self.next_ts as u64) - (ts_diff as u64);
        frm.set_keyframe(self.dec.is_intra());
        frm.set_frame_type(ftype);
        frm.set_pts(Some(ts >> 3));
        Ok(frm.into_ref())
    }
    fn flush(&mut self) {
        self.dec.flush();
    }
}

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<dyn NADecoder + Send> {
    Box::new(RealVideo20Decoder::new())
}

#[cfg(test)]
mod test {
    use nihav_core::codecs::RegisteredDecoders;
    use nihav_core::demuxers::RegisteredDemuxers;
    use nihav_codec_support::test::dec_video::*;
    use crate::realmedia_register_all_codecs;
    use crate::realmedia_register_all_demuxers;
    #[test]
    fn test_rv20() {
        let mut dmx_reg = RegisteredDemuxers::new();
        realmedia_register_all_demuxers(&mut dmx_reg);
        let mut dec_reg = RegisteredDecoders::new();
        realmedia_register_all_codecs(&mut dec_reg);

        test_file_decoding("realmedia", "assets/RV/rv20_svt_atrc_640x352_realproducer_plus_8.51.rm", /*None*/Some(3000), true, false, None/*Some("rv20")*/, &dmx_reg, &dec_reg);
//        test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /*None*/Some(1000), true, false, Some("rv20"));
    }
}
Commit	Line	Data
5641dccf KS	1	use nihav_core::io::bitreader::*;
	2	use nihav_core::io::codebook::*;
	3	use nihav_core::formats;
	4	use nihav_core::frame::*;
	5	use nihav_core::codecs::*;
b4d5b851 KS	6	use nihav_codec_support::codecs::{MV, ZIGZAG};
	7	use nihav_codec_support::codecs::h263::*;
	8	use nihav_codec_support::codecs::h263::code::H263BlockDSP;
	9	use nihav_codec_support::codecs::h263::decoder::*;
	10	use nihav_codec_support::codecs::h263::data::*;
5641dccf	11
be91b1c3 KS	12
	13	#[allow(dead_code)]
	14	struct Tables {
	15	intra_mcbpc_cb: Codebook<u8>,
	16	inter_mcbpc_cb: Codebook<u8>,
507f4b11	17	mbtype_b_cb: Codebook<u8>,
be91b1c3	18	cbpy_cb: Codebook<u8>,
507f4b11	19	cbpc_b_cb: Codebook<u8>,
be91b1c3 KS	20	rl_cb: Codebook<H263RLSym>,
	21	aic_rl_cb: Codebook<H263RLSym>,
	22	mv_cb: Codebook<u8>,
	23	}
	24
	25	#[derive(Clone,Copy)]
	26	struct RPRInfo {
	27	present: bool,
	28	bits: u8,
	29	widths: [usize; 8],
	30	heights: [usize; 8],
	31	}
	32
	33	struct RealVideo20Decoder {
2422d969	34	info: NACodecInfoRef,
be91b1c3 KS	35	dec: H263BaseDecoder,
	36	tables: Tables,
	37	w: usize,
	38	h: usize,
	39	minor_ver: u8,
	40	rpr: RPRInfo,
2a2aa421	41	bdsp: H263BlockDSP,
5ce3689c KS	42	base_ts: u64,
	43	last_ts: u16,
	44	next_ts: u16,
be91b1c3 KS	45	}
	46
	47	struct RealVideo20BR<'a> {
	48	br: BitReader<'a>,
	49	tables: &'a Tables,
	50	num_slices: usize,
	51	slice_no: usize,
	52	slice_off: Vec<u32>,
	53	w: usize,
	54	h: usize,
	55	mb_w: usize,
	56	mb_h: usize,
be91b1c3	57	mb_pos_bits: u8,
be91b1c3 KS	58	minor_ver: u8,
be91b1c3 KS	59	rpr: RPRInfo,
5ce3689c	60	pts: u16,
be91b1c3 KS	61	}
	62
	63	struct RV20SliceInfo {
	64	ftype: Type,
32007ad9	65	seq: u32,
be91b1c3 KS	66	qscale: u8,
	67	mb_x: usize,
	68	mb_y: usize,
	69	mb_pos: usize,
	70	w: usize,
	71	h: usize,
	72	}
	73
	74	impl RV20SliceInfo {
32007ad9	75	fn new(ftype: Type, seq: u32, qscale: u8, mb_x: usize, mb_y: usize, mb_pos: usize, w: usize, h: usize) -> Self {
e07387c7	76	RV20SliceInfo { ftype, seq, qscale, mb_x, mb_y, mb_pos, w, h }
be91b1c3 KS	77	}
	78	}
	79
	80	impl<'a> RealVideo20BR<'a> {
	81	fn new(src: &'a [u8], tables: &'a Tables, width: usize, height: usize, minor_ver: u8, rpr: RPRInfo) -> Self {
	82	let nslices = (src[0] as usize) + 1;
	83	let mut slice_offs = Vec::with_capacity(nslices);
	84	{
	85	let offs = &src[1..][..nslices * 8];
fa90ccfb	86	let mut br = BitReader::new(offs, BitReaderMode::BE);
be91b1c3 KS	87	for _ in 0..nslices {
	88	br.skip(32).unwrap();
	89	let off = br.read(32).unwrap();
	90	slice_offs.push(off);
	91	}
	92	}
	93	let soff = nslices * 8 + 1;
	94	let mb_w = (width + 15) >> 4;
	95	let mb_h = (height + 15) >> 4;
	96	let max_pos = mb_w * mb_h - 1;
	97	let mut mbpb = 0;
	98	for i in 0..H263_MBB.len() {
	99	if max_pos <= H263_MBB[i].blocks {
	100	mbpb = H263_MBB[i].bits;
	101	break;
	102	}
	103	}
	104	RealVideo20BR {
fa90ccfb	105	br: BitReader::new(&src[soff..], BitReaderMode::BE),
e07387c7	106	tables,
be91b1c3 KS	107	num_slices: nslices,
	108	slice_no: 0,
	109	slice_off: slice_offs,
	110	w: width,
	111	h: height,
e07387c7 KS	112	mb_w,
e07387c7 KS	113	mb_h,
be91b1c3	114	mb_pos_bits: mbpb,
e07387c7 KS	115	minor_ver,
e07387c7 KS	116	rpr,
5ce3689c	117	pts: 0,
be91b1c3 KS	118	}
	119	}
	120
2a2aa421	121	#[allow(unused_variables)]
0c3b4923	122	fn decode_block(&mut self, sstate: &SliceState, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64], plane_no: usize, acpred: ACPredMode) -> DecoderResult<()> {
9037cf6b	123	let br = &mut self.br;
be91b1c3	124	let mut idx = 0;
2a2aa421	125	if !sstate.is_iframe && intra {
fc26b944	126	let mut dc = br.read(8)? as i16;
be91b1c3 KS	127	if dc == 255 { dc = 128; }
	128	blk[0] = dc << 3;
	129	idx = 1;
	130	}
	131	if !coded { return Ok(()); }
0c3b4923 KS	132	let scan = match acpred {
	133	ACPredMode::Hor => H263_SCAN_V,
	134	ACPredMode::Ver => H263_SCAN_H,
64e8b971	135	_ => &ZIGZAG,
0c3b4923	136	};
be91b1c3	137
2a2aa421	138	let rl_cb = if sstate.is_iframe { &self.tables.aic_rl_cb } else { &self.tables.rl_cb };
e3ace094	139	let q_add = if quant == 0 \|\| sstate.is_iframe { 0i16 } else { ((quant - 1) \| 1) as i16 };
43c8b55e	140	let q = if plane_no == 0 { (quant * 2) as i16 } else { H263_CHROMA_QUANT[quant as usize] as i16 };
be91b1c3	141	while idx < 64 {
fc26b944	142	let code = br.read_cb(rl_cb)?;
be91b1c3 KS	143	let run;
	144	let mut level;
	145	let last;
	146	if !code.is_escape() {
	147	run = code.get_run();
	148	level = code.get_level();
	149	last = code.is_last();
fc26b944	150	if br.read_bool()? { level = -level; }
32007ad9	151	level = (level * q) + q_add;
be91b1c3	152	} else {
fc26b944 KS	153	last = br.read_bool()?;
	154	run = br.read(6)? as u8;
	155	level = br.read_s(8)? as i16;
be91b1c3	156	if level == -128 {
fc26b944 KS	157	let low = br.read(5)? as i16;
fc26b944 KS	158	let top = br.read_s(6)? as i16;
be91b1c3 KS	159	level = (top << 5) \| low;
be91b1c3 KS	160	}
32007ad9	161	level = (level * q) + q_add;
be91b1c3 KS	162	if level < -2048 { level = -2048; }
	163	if level > 2047 { level = 2047; }
	164	}
	165	idx += run;
	166	validate!(idx < 64);
0c3b4923	167	let oidx = scan[idx as usize];
be91b1c3 KS	168	blk[oidx] = level;
	169	idx += 1;
	170	if last { break; }
	171	}
	172	Ok(())
	173	}
	174	}
	175
	176	fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
fc26b944	177	let code = br.read_cb(mv_cb)? as i16;
be91b1c3	178	if code == 0 { return Ok(0) }
fc26b944	179	if !br.read_bool()? {
be91b1c3 KS	180	Ok(code)
	181	} else {
	182	Ok(-code)
	183	}
	184	}
	185
	186	fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
fc26b944 KS	187	let xval = decode_mv_component(br, mv_cb)?;
fc26b944 KS	188	let yval = decode_mv_component(br, mv_cb)?;
be91b1c3 KS	189	Ok(MV::new(xval, yval))
	190	}
	191
43c8b55e KS	192	fn read_dquant(br: &mut BitReader, q: u8) -> DecoderResult<u8> {
	193	if br.read_bool()? {
	194	Ok(H263_MODIFIED_QUANT[br.read(1)? as usize][q as usize])
	195	} else {
	196	Ok(br.read(5)? as u8)
	197	}
	198	}
	199
be91b1c3 KS	200	impl<'a> BlockDecoder for RealVideo20BR<'a> {
	201
	202	#[allow(unused_variables)]
	203	fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
	204	self.slice_no = 0;
fc26b944	205	let shdr = self.read_slice_header()?;
2a2aa421	206	// self.slice_no += 1;
be91b1c3	207	validate!((shdr.mb_x == 0) && (shdr.mb_y == 0));
2a2aa421	208	/* let mb_count;
be91b1c3 KS	209	if self.slice_no < self.num_slices {
be91b1c3 KS	210	let pos = self.br.tell();
fc26b944	211	let shdr2 = self.read_slice_header()?;
be91b1c3 KS	212	self.br.seek(pos as u32)?;
	213	mb_count = shdr2.mb_pos - shdr.mb_pos;
	214	} else {
	215	mb_count = self.mb_w * self.mb_h;
2a2aa421	216	}*/
be91b1c3	217
0c3b4923	218	let plusinfo = Some(PlusInfo::new(shdr.ftype == Type::I, false, false, false));
32007ad9	219	let picinfo = PicInfo::new(shdr.w, shdr.h, shdr.ftype, MVMode::Long, false, false, shdr.qscale, shdr.seq as u16, None, plusinfo);
be91b1c3 KS	220	Ok(picinfo)
	221	}
	222
	223	#[allow(unused_variables)]
2a2aa421	224	fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
fc26b944	225	let shdr = self.read_slice_header()?;
be91b1c3 KS	226	self.slice_no += 1;
	227	let mb_count;
	228	if self.slice_no < self.num_slices {
0c3b4923	229	let pos = self.br.tell();
fc26b944	230	let shdr2 = self.read_slice_header()?;
be91b1c3	231	mb_count = shdr2.mb_pos - shdr.mb_pos;
0c3b4923	232	self.br.seek(pos as u32)?;
be91b1c3 KS	233	} else {
	234	mb_count = self.mb_w * self.mb_h - shdr.mb_pos;
	235	}
2a2aa421	236	let ret = SliceInfo::new(shdr.mb_x, shdr.mb_y, shdr.mb_pos + mb_count, shdr.qscale);
be91b1c3 KS	237
	238	Ok(ret)
	239	}
	240
43c8b55e	241	fn decode_block_header(&mut self, info: &PicInfo, _slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
9037cf6b	242	let br = &mut self.br;
43c8b55e	243	let mut q = sstate.quant;
be91b1c3 KS	244	match info.get_mode() {
be91b1c3 KS	245	Type::I => {
fc26b944 KS	246	let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
fc26b944 KS	247	while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
0c3b4923 KS	248	let mut acpred = ACPredMode::None;
	249	if let Some(ref pi) = info.plusinfo {
	250	if pi.aic {
	251	let acpp = br.read_bool()?;
	252	acpred = ACPredMode::DC;
0c3b4923 KS	253	if acpp {
	254	acpred = if br.read_bool()? { ACPredMode::Hor } else { ACPredMode::Ver };
	255	}
	256	}
0c3b4923	257	}
fc26b944	258	let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
be91b1c3 KS	259	let cbp = (cbpy << 2) \| (cbpc & 3);
	260	let dquant = (cbpc & 4) != 0;
	261	if dquant {
43c8b55e	262	q = read_dquant(br, q)?;
be91b1c3	263	}
0c3b4923 KS	264	let mut binfo = BlockInfo::new(Type::I, cbp, q);
	265	binfo.set_acpred(acpred);
	266	Ok(binfo)
be91b1c3 KS	267	},
be91b1c3 KS	268	Type::P => {
fc26b944	269	if br.read_bool()? {
be91b1c3 KS	270	return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant()));
be91b1c3 KS	271	}
fc26b944 KS	272	let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
fc26b944 KS	273	while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
be91b1c3 KS	274	let is_intra = (cbpc & 0x04) != 0;
	275	let dquant = (cbpc & 0x08) != 0;
	276	let is_4x4 = (cbpc & 0x10) != 0;
	277	if is_intra {
fc26b944	278	let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
be91b1c3 KS	279	let cbp = (cbpy << 2) \| (cbpc & 3);
be91b1c3 KS	280	if dquant {
43c8b55e	281	q = read_dquant(br, q)?;
be91b1c3 KS	282	}
be91b1c3 KS	283	let binfo = BlockInfo::new(Type::I, cbp, q);
be91b1c3 KS	284	return Ok(binfo);
	285	}
	286
fc26b944	287	let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
be91b1c3 KS	288	// if /* !aiv && */(cbpc & 3) != 3 {
	289	cbpy ^= 0xF;
	290	// }
	291	let cbp = (cbpy << 2) \| (cbpc & 3);
	292	if dquant {
43c8b55e	293	q = read_dquant(br, q)?;
be91b1c3	294	}
be91b1c3 KS	295	let mut binfo = BlockInfo::new(Type::P, cbp, q);
be91b1c3 KS	296	if !is_4x4 {
fc26b944	297	let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
be91b1c3 KS	298	binfo.set_mv(&mvec);
	299	} else {
	300	let mvec: [MV; 4] = [
fc26b944 KS	301	decode_mv(br, &self.tables.mv_cb)?,
	302	decode_mv(br, &self.tables.mv_cb)?,
	303	decode_mv(br, &self.tables.mv_cb)?,
	304	decode_mv(br, &self.tables.mv_cb)?
be91b1c3 KS	305	];
	306	binfo.set_mv(&mvec);
	307	}
be91b1c3 KS	308	Ok(binfo)
be91b1c3 KS	309	},
32007ad9	310	Type::B => { // B
507f4b11 KS	311	let mut mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize;
	312	while mbtype == 14 { mbtype = br.read_cb(&self.tables.mbtype_b_cb)? as usize; }
	313
	314	let is_coded = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_CODED) != 0;
	315	let is_intra = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_INTRA) != 0;
	316	let dquant = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_DQUANT) != 0;
	317	let is_fwd = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_FORWARD) != 0;
	318	let is_bwd = (H263_MBTYPE_B_CAPS[mbtype] & H263_MBB_CAP_BACKWARD) != 0;
	319
	320	let cbp = if is_coded {
	321	let cbpc = br.read_cb(&self.tables.cbpc_b_cb)?;
	322	let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
	323	if !is_intra { cbpy ^= 0xF; }
	324	(cbpy << 2) \| (cbpc & 3)
	325	} else { 0 };
1a151e53	326
507f4b11	327	if dquant {
43c8b55e	328	q = read_dquant(br, q)?;
507f4b11	329	}
507f4b11 KS	330
	331	if is_intra {
	332	let binfo = BlockInfo::new(Type::I, cbp, q);
	333	return Ok(binfo);
	334	}
	335
	336	let mut binfo = BlockInfo::new(Type::B, cbp, q);
	337	if is_fwd {
	338	let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
	339	binfo.set_mv(&mvec);
	340	}
	341	if is_bwd {
	342	let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
	343	binfo.set_b_mv(&mvec);
	344	}
	345	Ok(binfo)
	346	},
32007ad9	347	_ => { unreachable!(); },
be91b1c3 KS	348	}
	349	}
	350
2a2aa421	351	fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
0c3b4923	352	self.decode_block(sstate, quant, true, coded, blk, if no < 4 { 0 } else { no - 3 }, info.get_acpred())
be91b1c3 KS	353	}
	354
	355	#[allow(unused_variables)]
2a2aa421	356	fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
0c3b4923	357	self.decode_block(sstate, quant, false, coded, blk, if no < 4 { 0 } else { no - 3 }, ACPredMode::None)
be91b1c3 KS	358	}
be91b1c3 KS	359
2a2aa421	360	fn is_slice_end(&mut self) -> bool { false }
be91b1c3 KS	361	}
	362
	363	impl<'a> RealVideo20BR<'a> {
2a2aa421	364	#[allow(unused_variables)]
be91b1c3 KS	365	fn read_slice_header(&mut self) -> DecoderResult<RV20SliceInfo> {
	366	validate!(self.slice_no < self.num_slices);
	367
9037cf6b	368	let br = &mut self.br;
fc26b944	369	br.seek(self.slice_off[self.slice_no] * 8)?;
be91b1c3	370
fc26b944	371	let frm_type = br.read(2)?;
be91b1c3 KS	372	let ftype = match frm_type {
	373	0 \| 1 => { Type::I },
	374	2 => { Type::P },
507f4b11	375	_ => { Type::B },
be91b1c3 KS	376	};
be91b1c3 KS	377
fc26b944	378	let marker = br.read(1)?;
be91b1c3	379	validate!(marker == 0);
fc26b944	380	let qscale = br.read(5)? as u8;
be91b1c3 KS	381	validate!(qscale > 0);
be91b1c3 KS	382	if self.minor_ver >= 2 {
fc26b944	383	br.skip(1)?; // loop filter
be91b1c3 KS	384	}
be91b1c3 KS	385	let seq = if self.minor_ver <= 1 {
32007ad9	386	br.read(8)? << 8
be91b1c3	387	} else {
32007ad9	388	br.read(13)? << 3
be91b1c3	389	};
5ce3689c	390	self.pts = seq as u16;
be91b1c3 KS	391	let w;
	392	let h;
	393	if self.rpr.present {
fc26b944	394	let rpr = br.read(self.rpr.bits)? as usize;
be91b1c3 KS	395	if rpr == 0 {
	396	w = self.w;
	397	h = self.h;
	398	} else {
7c37f176 KS	399	w = self.rpr.widths[rpr - 1];
7c37f176 KS	400	h = self.rpr.heights[rpr - 1];
be91b1c3 KS	401	validate!((w != 0) && (h != 0));
	402	}
	403	} else {
	404	w = self.w;
	405	h = self.h;
	406	}
	407
fc26b944	408	let mb_pos = br.read(self.mb_pos_bits)? as usize;
be91b1c3 KS	409	let mb_x = mb_pos % self.mb_w;
	410	let mb_y = mb_pos / self.mb_w;
	411
fc26b944	412	br.skip(1)?; // no rounding
be91b1c3 KS	413
be91b1c3 KS	414	if (self.minor_ver <= 1) && (frm_type == 3) {
fc26b944	415	br.skip(5)?;
be91b1c3	416	}
be91b1c3	417
32007ad9	418	Ok(RV20SliceInfo::new(ftype, seq, qscale, mb_x, mb_y, mb_pos, w, h))
be91b1c3 KS	419	}
	420	}
	421
be91b1c3 KS	422	impl RealVideo20Decoder {
	423	fn new() -> Self {
	424	let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
	425	let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	426	let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
	427	let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
507f4b11 KS	428	let mut coderead = H263ShortCodeReader::new(H263_MBTYPE_B);
507f4b11 KS	429	let mbtype_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
be91b1c3 KS	430	let mut coderead = H263ShortCodeReader::new(H263_CBPY);
be91b1c3 KS	431	let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
507f4b11 KS	432	let mut coderead = H263ShortCodeReader::new(H263_CBPC_B);
507f4b11 KS	433	let cbpc_b_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
be91b1c3 KS	434	let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
	435	let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	436	let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
	437	let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
	438	let mut coderead = H263ShortCodeReader::new(H263_MV);
	439	let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
1a151e53	440
be91b1c3	441	let tables = Tables {
e07387c7 KS	442	intra_mcbpc_cb,
	443	inter_mcbpc_cb,
	444	mbtype_b_cb,
	445	cbpy_cb,
	446	cbpc_b_cb,
	447	rl_cb,
	448	aic_rl_cb,
	449	mv_cb,
be91b1c3 KS	450	};
	451
	452	RealVideo20Decoder{
2422d969	453	info: NACodecInfoRef::default(),
32007ad9	454	dec: H263BaseDecoder::new_b_frames(false),
e07387c7	455	tables,
be91b1c3 KS	456	w: 0,
	457	h: 0,
	458	minor_ver: 0,
	459	rpr: RPRInfo { present: false, bits: 0, widths: [0; 8], heights: [0; 8] },
2a2aa421	460	bdsp: H263BlockDSP::new(),
5ce3689c KS	461	base_ts: 0,
	462	last_ts: 0,
	463	next_ts: 0,
be91b1c3 KS	464	}
	465	}
	466	}
	467
	468	impl NADecoder for RealVideo20Decoder {
2a2aa421	469	#[allow(unused_variables)]
01613464	470	fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
be91b1c3 KS	471	if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
	472	let w = vinfo.get_width();
	473	let h = vinfo.get_height();
	474	let fmt = formats::YUV420_FORMAT;
	475	let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
2422d969	476	self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
be91b1c3 KS	477	self.w = w;
	478	self.h = h;
	479
	480	let edata = info.get_extradata().unwrap();
	481	let src: &[u8] = &edata;
	482	let ver = ((src[4] as u32) << 12) \| ((src[5] as u32) << 4) \| ((src[6] as u32) >> 4);
	483	let maj_ver = ver >> 16;
	484	let min_ver = (ver >> 8) & 0xFF;
	485	let mic_ver = ver & 0xFF;
be91b1c3 KS	486	validate!(maj_ver == 2);
	487	self.minor_ver = min_ver as u8;
	488	let rprb = src[1] & 7;
	489	if rprb == 0 {
	490	self.rpr.present = false;
	491	} else {
	492	self.rpr.present = true;
7c37f176	493	self.rpr.bits = ((rprb >> 1) + 1) as u8;
be91b1c3 KS	494	for i in 4..(src.len()/2) {
	495	self.rpr.widths [i - 4] = (src[i * 2] as usize) * 4;
	496	self.rpr.heights[i - 4] = (src[i * 2 + 1] as usize) * 4;
	497	}
	498	}
	499	Ok(())
	500	} else {
be91b1c3 KS	501	Err(DecoderError::InvalidData)
	502	}
	503	}
01613464	504	fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
be91b1c3 KS	505	let src = pkt.get_buffer();
be91b1c3 KS	506
be91b1c3 KS	507	let mut ibr = RealVideo20BR::new(&src, &self.tables, self.w, self.h, self.minor_ver, self.rpr);
be91b1c3 KS	508
fc26b944	509	let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
be91b1c3 KS	510
be91b1c3 KS	511	let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
5ce3689c KS	512	let ftype = self.dec.get_frame_type();
	513	let pts = ibr.pts;
	514	if ftype != FrameType::B {
	515	self.last_ts = self.next_ts;
	516	self.next_ts = pts;
	517	if self.last_ts > self.next_ts {
	518	self.base_ts += 1 << 16;
	519	}
	520	}
	521	let ts_diff = self.next_ts.wrapping_sub(pts);
	522	let ts = self.base_ts + (self.next_ts as u64) - (ts_diff as u64);
be91b1c3	523	frm.set_keyframe(self.dec.is_intra());
5ce3689c KS	524	frm.set_frame_type(ftype);
5ce3689c KS	525	frm.set_pts(Some(ts >> 3));
171860fc	526	Ok(frm.into_ref())
be91b1c3	527	}
f9be4e75 KS	528	fn flush(&mut self) {
	529	self.dec.flush();
	530	}
be91b1c3 KS	531	}
	532
	533	struct MBB { blocks: usize, bits: u8 }
	534	const H263_MBB: &[MBB; 7] = &[
	535	MBB{ blocks: 47, bits: 6 },
	536	MBB{ blocks: 98, bits: 7 },
	537	MBB{ blocks: 395, bits: 9 },
	538	MBB{ blocks: 1583, bits: 11 },
	539	MBB{ blocks: 6335, bits: 13 },
	540	MBB{ blocks: 9215, bits: 14 },
	541	MBB{ blocks: 65536, bits: 14 },
	542	];
	543
08a1fab7	544	pub fn get_decoder() -> Box<dyn NADecoder + Send> {
be91b1c3 KS	545	Box::new(RealVideo20Decoder::new())
	546	}
	547
	548	#[cfg(test)]
	549	mod test {
3167c45c KS	550	use nihav_core::codecs::RegisteredDecoders;
3167c45c KS	551	use nihav_core::demuxers::RegisteredDemuxers;
ce742854	552	use nihav_codec_support::test::dec_video::*;
e64739f8 KS	553	use crate::realmedia_register_all_codecs;
e64739f8 KS	554	use crate::realmedia_register_all_demuxers;
be91b1c3 KS	555	#[test]
be91b1c3 KS	556	fn test_rv20() {
3167c45c KS	557	let mut dmx_reg = RegisteredDemuxers::new();
	558	realmedia_register_all_demuxers(&mut dmx_reg);
	559	let mut dec_reg = RegisteredDecoders::new();
	560	realmedia_register_all_codecs(&mut dec_reg);
	561
	562	test_file_decoding("realmedia", "assets/RV/rv20_svt_atrc_640x352_realproducer_plus_8.51.rm", /None/Some(3000), true, false, None/Some("rv20")/, &dmx_reg, &dec_reg);
7c37f176	563	// test_file_decoding("realmedia", "assets/RV/rv20_cook_640x352_realproducer_plus_8.51.rm", /None/Some(1000), true, false, Some("rv20"));
be91b1c3 KS	564	}
be91b1c3 KS	565	}