let mut br = &mut self.br;
let mut idx = 0;
if !sstate.is_iframe && intra {
- let mut dc = br.read(8).unwrap() as i16;
+ let mut dc = br.read(8)? as i16;
if dc == 255 { dc = 128; }
blk[0] = dc << 3;
idx = 1;
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 code = br.read_cb(rl_cb)?;
let run;
let mut level;
let last;
run = code.get_run();
level = code.get_level();
last = code.is_last();
- if br.read_bool().unwrap() { level = -level; }
+ if br.read_bool()? { 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;
+ 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).unwrap() as i16;
- let top = br.read_s(6).unwrap() as i16;
+ let low = br.read(5)? as i16;
+ let top = br.read_s(6)? as i16;
level = (top << 5) | low;
}
if (idx != 0) || !sstate.is_iframe {
}
fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
- let code = br.read_cb(mv_cb).unwrap() as i16;
+ let code = br.read_cb(mv_cb)? as i16;
if code == 0 { return Ok(0) }
- if !br.read_bool().unwrap() {
+ 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).unwrap();
- let yval = decode_mv_component(br, mv_cb).unwrap();
+ let xval = decode_mv_component(br, mv_cb)?;
+ let yval = decode_mv_component(br, mv_cb)?;
//println!(" MV {},{} @ {}", xval, yval, br.tell());
Ok(MV::new(xval, yval))
}
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();
+ let shdr = self.read_slice_header()?;
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();
+ let shdr2 = self.read_slice_header()?;
self.br.seek(pos as u32)?;
mb_count = shdr2.mb_pos - shdr.mb_pos;
} else {
#[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();
+ 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().unwrap();
+ let shdr2 = self.read_slice_header()?;
mb_count = shdr2.mb_pos - shdr.mb_pos;
self.br.seek(pos as u32)?;
} else {
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 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 {
}
println!(" @ {}", br.tell());
}
- let cbpy = br.read_cb(&self.tables.cbpy_cb).unwrap();
+ 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).unwrap() as usize;
+ let idx = br.read(2)? 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());
Ok(binfo)
},
Type::P => {
- if br.read_bool().unwrap() {
+ 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).unwrap();
- while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb).unwrap(); }
+ 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).unwrap();
+ let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
let cbp = (cbpy << 2) | (cbpc & 3);
if dquant {
- let idx = br.read(2).unwrap() as usize;
+ let idx = br.read(2)? 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();
+ 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).unwrap() as usize;
+ let idx = br.read(2)? 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()];
+ 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).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()
+ 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);
}
validate!(self.slice_no < self.num_slices);
let mut br = &mut self.br;
- br.seek(self.slice_off[self.slice_no] * 8).unwrap();
+ br.seek(self.slice_off[self.slice_no] * 8)?;
//println!(" slice at off {}", br.tell());
- let frm_type = br.read(2).unwrap();
+ let frm_type = br.read(2)?;
let ftype = match frm_type {
0 | 1 => { Type::I },
2 => { Type::P },
_ => { Type::Skip },
};
- let marker = br.read(1).unwrap();
+ let marker = br.read(1)?;
validate!(marker == 0);
- let qscale = br.read(5).unwrap() as u8;
+ let qscale = br.read(5)? as u8;
validate!(qscale > 0);
if self.minor_ver >= 2 {
- br.skip(1).unwrap(); // loop filter
+ br.skip(1)?; // loop filter
}
let seq = if self.minor_ver <= 1 {
- br.read(8).unwrap() << 7
+ br.read(8)? << 7
} else {
- br.read(13).unwrap() << 2
+ br.read(13)? << 2
};
let w;
let h;
if self.rpr.present {
- let rpr = br.read(self.rpr.bits).unwrap() as usize;
+ let rpr = br.read(self.rpr.bits)? as usize;
if rpr == 0 {
w = self.w;
h = self.h;
h = self.h;
}
- let mb_pos = br.read(self.mb_pos_bits).unwrap() as usize;
+ 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).unwrap(); // no rounding
+ br.skip(1)?; // no rounding
if (self.minor_ver <= 1) && (frm_type == 3) {
- br.skip(5).unwrap();
+ br.skip(5)?;
}
println!("slice q {} mb {},{}", qscale, mb_x, mb_y);
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 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());
projects / nihav.git / blobdiff