4 use super::super::blockdsp;
20 fn new() -> Self { MVInfo{ mv: Vec::new(), mb_w: 0, mb_stride: 0, mb_start: 0, top: true, umv: false } }
21 fn reset(&mut self, mb_w: usize, mb_start: usize, umv: bool) {
22 self.mb_start = mb_start;
24 self.mb_stride = mb_w * 2;
26 self.mv.resize(self.mb_stride * 3, ZERO_MV);
29 fn update_row(&mut self) {
30 self.mb_start = self.mb_w + 1;
32 for i in 0..self.mb_stride {
33 self.mv[i] = self.mv[self.mb_stride * 2 + i];
36 #[allow(non_snake_case)]
37 fn predict(&mut self, mb_x: usize, blk_no: usize, use4: bool, diff: MV) -> MV {
41 let last = mb_x == self.mb_w - 1;
44 if mb_x != self.mb_start {
45 A = if mb_x != 0 { self.mv[self.mb_stride + mb_x * 2 - 1] } else { ZERO_MV };
46 B = if !self.top { self.mv[ mb_x * 2] } else { A };
47 C = if !self.top && !last { self.mv[mb_x * 2 + 2] } else { ZERO_MV };
49 A = ZERO_MV; B = ZERO_MV; C = ZERO_MV;
53 A = self.mv[self.mb_stride + mb_x * 2];
54 B = if !self.top { self.mv[mb_x * 2 + 1] } else { A };
55 C = if !self.top && !last { self.mv[mb_x * 2 + 2] } else { A };
58 A = if mb_x != self.mb_start { self.mv[self.mb_stride * 2 + mb_x * 2 - 1] } else { ZERO_MV };
59 B = self.mv[self.mb_stride + mb_x * 2];
60 C = self.mv[self.mb_stride + mb_x * 2 + 1];
63 A = self.mv[self.mb_stride * 2 + mb_x * 2];
64 B = self.mv[self.mb_stride * 1 + mb_x * 2 + 1];
65 C = self.mv[self.mb_stride * 1 + mb_x * 2];
67 _ => { return ZERO_MV; }
69 let pred_mv = MV::pred(A, B, C);
70 let new_mv = MV::add_umv(pred_mv, diff, self.umv);
72 self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv;
73 self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv;
74 self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv;
75 self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv;
78 0 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv; },
79 1 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv; },
80 2 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv; },
81 3 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv; },
88 fn set_zero_mv(&mut self, mb_x: usize) {
89 self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = ZERO_MV;
90 self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = ZERO_MV;
91 self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = ZERO_MV;
92 self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = ZERO_MV;
96 fn copy_blocks(dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV) {
97 let srcx = ((mv.x >> 1) as isize) + (xpos as isize);
98 let srcy = ((mv.y >> 1) as isize) + (ypos as isize);
99 let mode = ((mv.x & 1) + (mv.y & 1) * 2) as usize;
101 blockdsp::copy_blocks(dst, src, xpos, ypos, srcx, srcy, w, h, 0, 1, mode, H263_INTERP_FUNCS);
104 fn avg_blocks(dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV) {
105 let srcx = ((mv.x >> 1) as isize) + (xpos as isize);
106 let srcy = ((mv.y >> 1) as isize) + (ypos as isize);
107 let mode = ((mv.x & 1) + (mv.y & 1) * 2) as usize;
109 blockdsp::copy_blocks(dst, src, xpos, ypos, srcx, srcy, w, h, 0, 1, mode, H263_INTERP_AVG_FUNCS);
113 #[derive(Clone,Copy)]
124 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} }
127 pub struct H263BaseDecoder {
134 prev_frm: Option<NAVideoBuffer<u8>>,
135 cur_frm: Option<NAVideoBuffer<u8>>,
142 impl H263BaseDecoder {
143 pub fn new() -> Self {
145 w: 0, h: 0, mb_w: 0, mb_h: 0, num_mb: 0,
146 ftype: Type::Special,
147 prev_frm: None, cur_frm: None,
149 has_b: false, b_data: Vec::new(),
153 pub fn is_intra(&self) -> bool { self.ftype == Type::I }
154 pub fn get_dimensions(&self) -> (usize, usize) { (self.w, self.h) }
156 pub fn parse_frame(&mut self, bd: &mut BlockDecoder) -> DecoderResult<NABufferType> {
157 let pinfo = bd.decode_pichdr()?;
158 let mut mvi = MVInfo::new();
159 let mut cbpi = CBPInfo::new();
161 //todo handle res change
164 self.mb_w = (pinfo.w + 15) >> 4;
165 self.mb_h = (pinfo.h + 15) >> 4;
166 self.num_mb = self.mb_w * self.mb_h;
167 self.ftype = pinfo.mode;
168 self.has_b = pinfo.is_pb();
171 self.b_data.truncate(0);
174 mem::swap(&mut self.cur_frm, &mut self.prev_frm);
176 let tsdiff = pinfo.ts.wrapping_sub(self.last_ts);
177 let bsdiff = if pinfo.is_pb() { pinfo.get_pbinfo().get_trb() } else { 0 };
179 let fmt = formats::YUV420_FORMAT;
180 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
181 let bufret = alloc_video_buffer(vinfo, 4);
182 if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
183 let mut bufinfo = bufret.unwrap();
184 let mut buf = bufinfo.get_vbuf().unwrap();
186 let mut slice = Slice::get_default_slice(&pinfo);
187 mvi.reset(self.mb_w, 0, pinfo.get_umv());
188 cbpi.reset(self.mb_w);
190 let mut blk: [[i16; 64]; 6] = [[0; 64]; 6];
191 for mb_y in 0..self.mb_h {
192 for mb_x in 0..self.mb_w {
193 for i in 0..6 { for j in 0..64 { blk[i][j] = 0; } }
195 if ((mb_x != 0) || (mb_y != 0)) && bd.is_slice_end() {
196 slice = bd.decode_slice_header(&pinfo)?;
197 mvi.reset(self.mb_w, mb_x, pinfo.get_umv());
198 //cbpi.reset(self.mb_w);
201 let binfo = bd.decode_block_header(&pinfo, &slice)?;
202 let cbp = binfo.get_cbp();
203 cbpi.set_cbp(mb_x, cbp);
204 cbpi.set_q(mb_x, binfo.get_q());
205 if binfo.is_intra() {
207 bd.decode_block_intra(&binfo, binfo.get_q(), i, (cbp & (1 << (5 - i))) != 0, &mut blk[i])?;
208 h263_idct(&mut blk[i]);
210 blockdsp::put_blocks(&mut buf, mb_x, mb_y, &blk);
211 mvi.set_zero_mv(mb_x);
212 } else if !binfo.is_skipped() {
213 if binfo.get_num_mvs() == 1 {
214 let mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0));
215 if let Some(ref srcbuf) = self.prev_frm {
216 copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, mv);
220 let mv = mvi.predict(mb_x, blk_no, true, binfo.get_mv(blk_no));
221 if let Some(ref srcbuf) = self.prev_frm {
222 copy_blocks(&mut buf, srcbuf,
223 mb_x * 16 + (blk_no & 1) * 8,
224 mb_y * 16 + (blk_no & 2) * 4, 8, 8, mv);
229 bd.decode_block_inter(&binfo, binfo.get_q(), i, ((cbp >> (5 - i)) & 1) != 0, &mut blk[i])?;
230 h263_idct(&mut blk[i]);
232 blockdsp::add_blocks(&mut buf, mb_x, mb_y, &blk);
234 mvi.set_zero_mv(mb_x);
235 if let Some(ref srcbuf) = self.prev_frm {
236 copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, ZERO_MV);
240 let mut b_mb = BMB::new();
241 let cbp = binfo.get_cbp_b();
242 let bq = (((pinfo.get_pbinfo().get_dbquant() + 5) as u16) * (binfo.get_q() as u16)) >> 2;
244 if bq < 1 { bquant = 1; }
245 else if bq > 31 { bquant = 31; }
246 else { bquant = bq as u8; }
250 bd.decode_block_inter(&binfo, bquant, i, (cbp & (1 << (5 - i))) != 0, &mut b_mb.blk[i])?;
251 h263_idct(&mut b_mb.blk[i]);
254 let is_fwd = !binfo.is_b_fwd();
256 b_mb.num_mv = binfo.get_num_mvs();
257 if binfo.get_num_mvs() == 0 {
259 b_mb.mv_f[0] = binfo.get_mv2(1);
260 b_mb.mv_b[0] = binfo.get_mv2(0);
261 } else if binfo.get_num_mvs() == 1 {
262 let src_mv = binfo.get_mv(0).scale(bsdiff, tsdiff);
263 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_umv());
264 let mv_b = MV::b_sub(binfo.get_mv(0), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
269 let src_mv = binfo.get_mv(blk_no).scale(bsdiff, tsdiff);
270 let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_umv());
271 let mv_b = MV::b_sub(binfo.get_mv(blk_no), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
272 b_mb.mv_f[blk_no] = mv_f;
273 b_mb.mv_b[blk_no] = mv_b;
276 self.b_data.push(b_mb);
280 bd.filter_row(&mut buf, mb_y, self.mb_w, &cbpi);
286 self.cur_frm = Some(buf);
287 self.last_ts = pinfo.ts;
291 pub fn get_bframe(&mut self) -> DecoderResult<NABufferType> {
292 if !self.has_b || !self.cur_frm.is_some() || !self.prev_frm.is_some() {
293 return Err(DecoderError::MissingReference);
297 let fmt = formats::YUV420_FORMAT;
298 let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
299 let bufret = alloc_video_buffer(vinfo, 4);
300 if let Err(_) = bufret { return Err(DecoderError::InvalidData); }
301 let mut bufinfo = bufret.unwrap();
302 let mut b_buf = bufinfo.get_vbuf().unwrap();
304 if let Some(ref bck_buf) = self.prev_frm {
305 if let Some(ref fwd_buf) = self.cur_frm {
306 recon_b_frame(&mut b_buf, bck_buf, fwd_buf, self.mb_w, self.mb_h, &self.b_data);
310 self.b_data.truncate(0);
315 fn recon_b_frame(b_buf: &mut NAVideoBuffer<u8>, bck_buf: &NAVideoBuffer<u8>, fwd_buf: &NAVideoBuffer<u8>,
316 mb_w: usize, mb_h: usize, b_data: &Vec<BMB>) {
317 let mut cbpi = CBPInfo::new();
320 for mb_y in 0..mb_h {
321 for mb_x in 0..mb_w {
322 let num_mv = b_data[cur_mb].num_mv;
323 let is_fwd = b_data[cur_mb].fwd;
324 let cbp = b_data[cur_mb].cbp;
325 cbpi.set_cbp(mb_x, cbp);
327 copy_blocks(b_buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_b[0]);
329 avg_blocks(b_buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_f[0]);
333 let xpos = mb_x * 16 + (blk_no & 1) * 8;
334 let ypos = mb_y * 16 + (blk_no & 2) * 4;
335 copy_blocks(b_buf, fwd_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_b[blk_no]);
337 avg_blocks(b_buf, bck_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_f[blk_no]);
342 blockdsp::add_blocks(b_buf, mb_x, mb_y, &b_data[cur_mb].blk);