+++ /dev/null
-use crate::io::bitreader::*;
-use crate::io::codebook::*;
-use crate::formats;
-use super::super::*;
-use super::*;
-use super::decoder::*;
-use super::data::*;
-use super::code::H263BlockDSP;
-
-#[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: H263BaseDecoder,
- tables: Tables,
- bdsp: H263BlockDSP,
-}
-
-struct Intel263BR<'a> {
- br: BitReader<'a>,
- tables: &'a Tables,
- gob_no: usize,
- mb_w: usize,
- is_pb: bool,
- is_ipb: 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,
- is_ipb: false,
- }
- }
-
- fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
- let 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_ipb: bool, is_intra: bool) -> DecoderResult<BBlockInfo> {
- if is_pb { // as improved pb
- if is_ipb {
- 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 {
- let mvdb = br.read_bool()?;
- let cbpb = if mvdb && br.read_bool()? { br.read(6)? as u8 } else { 0 };
- Ok(BBlockInfo::new(true, cbpb, if mvdb { 1 } else { 0 }, 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 br = &mut self.br;
- let syncw = br.read(22)?;
- validate!(syncw == 0x000020);
- let tr = (br.read(8)? << 8) as u16;
- 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;
- let pbplus;
- 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
- pbplus = br.read_bool()?;
- br.read(5)?; // unknown flags
- let marker = br.read(5)?;
- validate!(marker == 1);
- } else {
- deblock = false;
- pbplus = false;
- }
- self.is_ipb = pbplus;
- 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, pbplus));
- } 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 plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
- let mvmode = if umv { MVMode::UMV } else { MVMode::Old };
- let picinfo = PicInfo::new(w, h, ftype, mvmode, umv, apm, quant as u8, tr, pbinfo, plusinfo);
- Ok(picinfo)
- }
-
- #[allow(unused_variables)]
- fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
- let 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 = SliceInfo::new_gob(0, self.gob_no, gquant as u8);
- self.gob_no += 1;
- Ok(ret)
- }
-
- #[allow(unused_variables)]
- fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo> {
- let 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, self.is_ipb, 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, self.is_ipb, 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, sstate: &SliceState, 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, sstate: &SliceState, 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 }
-}
-
-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: H263BaseDecoder::new(true),
- tables: tables,
- bdsp: H263BlockDSP::new(),
- }
- }
-}
-
-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(&self.bdsp);
- 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, &self.bdsp)?;
-
- 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 crate::test::dec_video::test_file_decoding;
- #[test]
- fn test_intel263() {
- test_file_decoding("avi", "assets/neal73_saber.avi", Some(16), true, false, None/*Some("i263")*/);
- }
-}
projects / nihav.git / blobdiff