X-Git-Url: https://git.nihav.org/?a=blobdiff_plain;f=src%2Fcodecs%2Fh263%2Fdecoder.rs;h=a0e7ce4232cc6b42f4283c95db3b107b791b15df;hb=HEAD;hp=a126bd3d0a731c0c5d0047c48541adf3d8130541;hpb=2a2aa42194e01760a5209599c0257a4f55c9bb38;p=nihav.git diff --git a/src/codecs/h263/decoder.rs b/src/codecs/h263/decoder.rs deleted file mode 100644 index a126bd3..0000000 --- a/src/codecs/h263/decoder.rs +++ /dev/null @@ -1,343 +0,0 @@ -use std::mem; -use frame::*; -use super::super::*; -use super::super::blockdsp; -use super::*; -use super::code::*; -use formats; - -#[allow(dead_code)] -struct MVInfo { - mv: Vec, - mb_w: usize, - mb_stride: usize, - mb_start: usize, - top: bool, - mvmode: MVMode, -} - -impl MVInfo { - fn new() -> Self { MVInfo{ mv: Vec::new(), mb_w: 0, mb_stride: 0, mb_start: 0, top: true, mvmode: MVMode::Old } } - fn reset(&mut self, mb_w: usize, mb_start: usize, mvmode: MVMode) { - self.mb_start = mb_start; - self.mb_w = mb_w; - self.mb_stride = mb_w * 2; - self.top = true; - self.mv.resize(self.mb_stride * 3, ZERO_MV); - self.mvmode = mvmode; - } - fn update_row(&mut self) { - self.mb_start = self.mb_w + 1; - self.top = false; - for i in 0..self.mb_stride { - self.mv[i] = self.mv[self.mb_stride * 2 + i]; - } - } - #[allow(non_snake_case)] - fn predict(&mut self, mb_x: usize, blk_no: usize, use4: bool, diff: MV) -> MV { - let A; - let B; - let C; - let last = mb_x == self.mb_w - 1; - match blk_no { - 0 => { - if mb_x != self.mb_start { - A = if mb_x != 0 { self.mv[self.mb_stride + mb_x * 2 - 1] } else { ZERO_MV }; - B = if !self.top { self.mv[ mb_x * 2] } else { A }; - C = if !self.top && !last { self.mv[mb_x * 2 + 2] } else { ZERO_MV }; - } else { - A = ZERO_MV; B = ZERO_MV; C = ZERO_MV; - } - }, - 1 => { - A = self.mv[self.mb_stride + mb_x * 2]; - B = if !self.top { self.mv[mb_x * 2 + 1] } else { A }; - C = if !self.top && !last { self.mv[mb_x * 2 + 2] } else { A }; - }, - 2 => { - A = if mb_x != self.mb_start { self.mv[self.mb_stride * 2 + mb_x * 2 - 1] } else { ZERO_MV }; - B = self.mv[self.mb_stride + mb_x * 2]; - C = self.mv[self.mb_stride + mb_x * 2 + 1]; - }, - 3 => { - A = self.mv[self.mb_stride * 2 + mb_x * 2]; - B = self.mv[self.mb_stride * 1 + mb_x * 2 + 1]; - C = self.mv[self.mb_stride * 1 + mb_x * 2]; - }, - _ => { return ZERO_MV; } - } - let pred_mv = MV::pred(A, B, C); - let new_mv = MV::add_umv(pred_mv, diff, self.mvmode); - if !use4 { - self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv; - self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv; - self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv; - self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv; - } else { - match blk_no { - 0 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv; }, - 1 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv; }, - 2 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv; }, - 3 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv; }, - _ => {}, - }; - } - - new_mv - } - fn set_zero_mv(&mut self, mb_x: usize) { - self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = ZERO_MV; - self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = ZERO_MV; - self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = ZERO_MV; - self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = ZERO_MV; - } -} - -#[allow(dead_code)] -#[derive(Clone,Copy)] -struct BMB { - num_mv: usize, - mv_f: [MV; 4], - mv_b: [MV; 4], - fwd: bool, - blk: [[i16; 64]; 6], - cbp: u8, -} - -impl BMB { - fn new() -> Self { BMB {blk: [[0; 64]; 6], cbp: 0, fwd: false, mv_f: [ZERO_MV; 4], mv_b: [ZERO_MV; 4], num_mv: 0} } -} - -pub struct H263BaseDecoder { - w: usize, - h: usize, - mb_w: usize, - mb_h: usize, - num_mb: usize, - ftype: Type, - prev_frm: Option>, - cur_frm: Option>, - last_ts: u8, - has_b: bool, - b_data: Vec, -} - -#[allow(dead_code)] -impl H263BaseDecoder { - pub fn new() -> Self { - H263BaseDecoder{ - w: 0, h: 0, mb_w: 0, mb_h: 0, num_mb: 0, - ftype: Type::Special, - prev_frm: None, cur_frm: None, - last_ts: 0, - has_b: false, b_data: Vec::new(), - } - } - - pub fn is_intra(&self) -> bool { self.ftype == Type::I } - pub fn get_dimensions(&self) -> (usize, usize) { (self.w, self.h) } - - pub fn parse_frame(&mut self, bd: &mut BlockDecoder, bdsp: &BlockDSP) -> DecoderResult { - let pinfo = bd.decode_pichdr()?; - let mut mvi = MVInfo::new(); - let mut cbpi = CBPInfo::new(); - -//todo handle res change - self.w = pinfo.w; - self.h = pinfo.h; - self.mb_w = (pinfo.w + 15) >> 4; - self.mb_h = (pinfo.h + 15) >> 4; - self.num_mb = self.mb_w * self.mb_h; - self.ftype = pinfo.mode; - self.has_b = pinfo.is_pb(); - - if self.has_b { - self.b_data.truncate(0); - } - - mem::swap(&mut self.cur_frm, &mut self.prev_frm); - - let tsdiff = pinfo.ts.wrapping_sub(self.last_ts); - let bsdiff = if pinfo.is_pb() { pinfo.get_pbinfo().get_trb() } else { 0 }; - - let fmt = formats::YUV420_FORMAT; - let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt); - let bufret = alloc_video_buffer(vinfo, 4); - if let Err(_) = bufret { return Err(DecoderError::InvalidData); } - let mut bufinfo = bufret.unwrap(); - let mut buf = bufinfo.get_vbuf().unwrap(); - - let mut slice = if bd.is_gob() { - SliceInfo::get_default_slice(&pinfo) - } else { - bd.decode_slice_header(&pinfo)? - }; - mvi.reset(self.mb_w, 0, pinfo.get_mvmode()); - cbpi.reset(self.mb_w); - - let mut blk: [[i16; 64]; 6] = [[0; 64]; 6]; - let mut sstate = SliceState::new(pinfo.mode == Type::I); - let mut mb_pos = 0; - for mb_y in 0..self.mb_h { - for mb_x in 0..self.mb_w { - for i in 0..6 { for j in 0..64 { blk[i][j] = 0; } } - - if slice.is_at_end(mb_pos) || (slice.needs_check() && mb_pos > 0 && bd.is_slice_end()) { - slice = bd.decode_slice_header(&pinfo)?; - //mvi.reset(self.mb_w, mb_x, pinfo.get_mvmode()); - //cbpi.reset(self.mb_w); - } - - let binfo = bd.decode_block_header(&pinfo, &slice, &sstate)?; - let cbp = binfo.get_cbp(); - cbpi.set_cbp(mb_x, cbp); - cbpi.set_q(mb_x, binfo.get_q()); - if binfo.is_intra() { - for i in 0..6 { - bd.decode_block_intra(&binfo, &sstate, binfo.get_q(), i, (cbp & (1 << (5 - i))) != 0, &mut blk[i])?; - h263_idct(&mut blk[i]); - } - blockdsp::put_blocks(&mut buf, mb_x, mb_y, &blk); - mvi.set_zero_mv(mb_x); - } else if !binfo.is_skipped() { - if binfo.get_num_mvs() == 1 { - let mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0)); - if let Some(ref srcbuf) = self.prev_frm { - bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, mv); - } - } else { - for blk_no in 0..4 { - let mv = mvi.predict(mb_x, blk_no, true, binfo.get_mv(blk_no)); - if let Some(ref srcbuf) = self.prev_frm { - bdsp.copy_blocks(&mut buf, srcbuf, - mb_x * 16 + (blk_no & 1) * 8, - mb_y * 16 + (blk_no & 2) * 4, 8, 8, mv); - } - } - } - for i in 0..6 { - bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((cbp >> (5 - i)) & 1) != 0, &mut blk[i])?; - h263_idct(&mut blk[i]); - } - blockdsp::add_blocks(&mut buf, mb_x, mb_y, &blk); - } else { - mvi.set_zero_mv(mb_x); - if let Some(ref srcbuf) = self.prev_frm { - bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, ZERO_MV); - } - } - if pinfo.is_pb() { - let mut b_mb = BMB::new(); - let cbp = binfo.get_cbp_b(); - let bq = (((pinfo.get_pbinfo().get_dbquant() + 5) as u16) * (binfo.get_q() as u16)) >> 2; - let bquant; - if bq < 1 { bquant = 1; } - else if bq > 31 { bquant = 31; } - else { bquant = bq as u8; } - - b_mb.cbp = cbp; - for i in 0..6 { - bd.decode_block_inter(&binfo, &sstate, bquant, i, (cbp & (1 << (5 - i))) != 0, &mut b_mb.blk[i])?; - h263_idct(&mut b_mb.blk[i]); - } - - let is_fwd = !binfo.is_b_fwd(); - b_mb.fwd = is_fwd; - b_mb.num_mv = binfo.get_num_mvs(); - if binfo.get_num_mvs() == 0 { - b_mb.num_mv = 1; - b_mb.mv_f[0] = binfo.get_mv2(1); - b_mb.mv_b[0] = binfo.get_mv2(0); - } else if binfo.get_num_mvs() == 1 { - let src_mv = binfo.get_mv(0).scale(bsdiff, tsdiff); - let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode()); - let mv_b = MV::b_sub(binfo.get_mv(0), mv_f, binfo.get_mv2(0), bsdiff, tsdiff); - b_mb.mv_f[0] = mv_f; - b_mb.mv_b[0] = mv_b; - } else { - for blk_no in 0..4 { - let src_mv = binfo.get_mv(blk_no).scale(bsdiff, tsdiff); - let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode()); - let mv_b = MV::b_sub(binfo.get_mv(blk_no), mv_f, binfo.get_mv2(0), bsdiff, tsdiff); - b_mb.mv_f[blk_no] = mv_f; - b_mb.mv_b[blk_no] = mv_b; - } - } - self.b_data.push(b_mb); - } - sstate.next_mb(); - mb_pos += 1; - } - if let Some(plusinfo) = pinfo.plusinfo { - if plusinfo.deblock { - bdsp.filter_row(&mut buf, mb_y, self.mb_w, &cbpi); - } - } - mvi.update_row(); - cbpi.update_row(); - sstate.new_row(); - } - - self.cur_frm = Some(buf); - self.last_ts = pinfo.ts; - Ok(bufinfo) - } - - pub fn get_bframe(&mut self, bdsp: &BlockDSP) -> DecoderResult { - if !self.has_b || !self.cur_frm.is_some() || !self.prev_frm.is_some() { - return Err(DecoderError::MissingReference); - } - self.has_b = false; - - let fmt = formats::YUV420_FORMAT; - let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt); - let bufret = alloc_video_buffer(vinfo, 4); - if let Err(_) = bufret { return Err(DecoderError::InvalidData); } - let mut bufinfo = bufret.unwrap(); - let mut b_buf = bufinfo.get_vbuf().unwrap(); - - if let Some(ref bck_buf) = self.prev_frm { - if let Some(ref fwd_buf) = self.cur_frm { - recon_b_frame(&mut b_buf, bck_buf, fwd_buf, self.mb_w, self.mb_h, &self.b_data, bdsp); - } - } - - self.b_data.truncate(0); - Ok(bufinfo) - } -} - -fn recon_b_frame(b_buf: &mut NAVideoBuffer, bck_buf: &NAVideoBuffer, fwd_buf: &NAVideoBuffer, - mb_w: usize, mb_h: usize, b_data: &Vec, bdsp: &BlockDSP) { - let mut cbpi = CBPInfo::new(); - let mut cur_mb = 0; - cbpi.reset(mb_w); - for mb_y in 0..mb_h { - for mb_x in 0..mb_w { - let num_mv = b_data[cur_mb].num_mv; - let is_fwd = b_data[cur_mb].fwd; - let cbp = b_data[cur_mb].cbp; - cbpi.set_cbp(mb_x, cbp); - if num_mv == 1 { - bdsp.copy_blocks(b_buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_b[0]); - if !is_fwd { - bdsp.avg_blocks(b_buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_f[0]); - } - } else { - for blk_no in 0..4 { - let xpos = mb_x * 16 + (blk_no & 1) * 8; - let ypos = mb_y * 16 + (blk_no & 2) * 4; - bdsp.copy_blocks(b_buf, fwd_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_b[blk_no]); - if !is_fwd { - bdsp.avg_blocks(b_buf, bck_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_f[blk_no]); - } - } - } - if cbp != 0 { - blockdsp::add_blocks(b_buf, mb_x, mb_y, &b_data[cur_mb].blk); - } - cur_mb += 1; - } - cbpi.update_row(); - } -}