X-Git-Url: https://git.nihav.org/?a=blobdiff_plain;f=nihav-itu%2Fsrc%2Fcodecs%2Fh264%2Fdecoder_st.rs;fp=nihav-itu%2Fsrc%2Fcodecs%2Fh264%2Fdecoder_st.rs;h=d906e592d6155213d5327e923f98db21fec67e61;hb=47ecb2b793dbc1451db36bcc500e069efd038fe8;hp=0000000000000000000000000000000000000000;hpb=366d60cc06e8deec212804065d80980f1b57b566;p=nihav.git diff --git a/nihav-itu/src/codecs/h264/decoder_st.rs b/nihav-itu/src/codecs/h264/decoder_st.rs new file mode 100644 index 0000000..d906e59 --- /dev/null +++ b/nihav-itu/src/codecs/h264/decoder_st.rs @@ -0,0 +1,908 @@ +use nihav_core::codecs::*; +use nihav_core::io::bitreader::*; + +use super::*; + +struct H264Decoder { + info: NACodecInfoRef, + width: usize, + height: usize, + num_mbs: usize, + nal_len: u8, + sps: Vec, + cur_sps: usize, + pps: Vec, + cur_pps: usize, + + skip_mode: FrameSkipMode, + deblock_skip: bool, + + is_mbaff: bool, + + cavlc_cb: CAVLCTables, + + sstate: SliceState, + + cur_pic: Option, + cur_id: u16, + has_pic: bool, + frame_refs: FrameRefs, + + temporal_mv: bool, + deblock_mode: u8, + lf_alpha: i8, + lf_beta: i8, + is_s: bool, + + ipcm_buf: [u8; 256 + 64 + 64], + + mc_dsp: H264MC, + + transform_8x8_mode: bool, +} + +impl H264Decoder { + fn new() -> Self { + let avg_vi = NAVideoInfo { width: 32, height: 32, flipped: false, format: YUV420_FORMAT, bits: 12 }; + let avg_buf = alloc_video_buffer(avg_vi, 4).unwrap().get_vbuf().unwrap(); + H264Decoder{ + info: NACodecInfoRef::default(), + width: 0, + height: 0, + num_mbs: 0, + nal_len: 0, + sps: Vec::with_capacity(1), + cur_sps: 0, + pps: Vec::with_capacity(3), + cur_pps: 0, + + skip_mode: FrameSkipMode::default(), + deblock_skip: false, + + is_mbaff: false, + + cavlc_cb: CAVLCTables::new(), + + sstate: SliceState::new(), + cur_pic: None, + cur_id: 0, + has_pic: false, + frame_refs: FrameRefs::new(), + + temporal_mv: false, + deblock_mode: 0, + lf_alpha: 0, + lf_beta: 0, + is_s: false, + + ipcm_buf: [0; 256 + 64 + 64], + + mc_dsp: H264MC::new(avg_buf), + + transform_8x8_mode: false, + } + } + fn handle_nal(&mut self, src: &[u8], supp: &mut NADecoderSupport, skip_decoding: bool) -> DecoderResult<()> { + validate!(!src.is_empty()); + validate!((src[0] & 0x80) == 0); + let nal_ref_idc = src[0] >> 5; + let nal_unit_type = src[0] & 0x1F; + + let mut full_size = src.len() * 8; + for &byte in src.iter().rev() { + if byte == 0 { + full_size -= 8; + } else { + full_size -= (byte.trailing_zeros() + 1) as usize; + break; + } + } + validate!(full_size > 0); + match nal_unit_type { + 1 | 5 if !skip_decoding => { + let is_idr = nal_unit_type == 5; + let mut br = BitReader::new(&src[..(full_size + 7)/8], BitReaderMode::BE); + br.skip(8)?; + + let slice_hdr = parse_slice_header(&mut br, &self.sps, &self.pps, is_idr, nal_ref_idc)?; + validate!(br.tell() < full_size); + let full_id; + if slice_hdr.first_mb_in_slice == 0 { + validate!(self.cur_pic.is_none()); + for (i, pps) in self.pps.iter().enumerate() { + if pps.pic_parameter_set_id == slice_hdr.pic_parameter_set_id { + self.cur_pps = i; + break; + } + } + for (i, sps) in self.sps.iter().enumerate() { + if sps.seq_parameter_set_id == self.pps[self.cur_pps].seq_parameter_set_id { + self.cur_sps = i; + break; + } + } + + full_id = self.frame_refs.calc_picture_num(&slice_hdr, is_idr, nal_ref_idc, &self.sps[self.cur_sps]); + + let sps = &self.sps[self.cur_sps]; + if sps.chroma_format_idc != 1 || sps.bit_depth_luma != 8 || sps.bit_depth_chroma != 8 { +println!(" chroma fmt {} bits {}/{}", sps.chroma_format_idc, sps.bit_depth_luma, sps.bit_depth_chroma); + return Err(DecoderError::NotImplemented); + } + //let pps = &self.pps[self.cur_pps]; + + if is_idr { + self.frame_refs.clear_refs(); + } + + self.width = sps.pic_width_in_mbs << 4; + self.height = sps.pic_height_in_mbs << 4; + self.num_mbs = sps.pic_width_in_mbs * sps.pic_height_in_mbs; + self.mc_dsp.set_dimensions(self.width, self.height); + + self.is_mbaff = sps.mb_adaptive_frame_field && !slice_hdr.field_pic; + if self.is_mbaff { +println!("MBAFF"); + return Err(DecoderError::NotImplemented); + } + if !sps.frame_mbs_only { +println!("PAFF?"); + return Err(DecoderError::NotImplemented); + } + +//if slice_hdr.slice_type.is_b() { return Ok(()); } + self.cur_id = full_id as u16; + } else { + if let Some(ref mut pic) = self.cur_pic { + validate!(pic.cur_mb == slice_hdr.first_mb_in_slice); + let new_type = slice_hdr.slice_type.to_frame_type(); + pic.pic_type = match (pic.pic_type, new_type) { + (FrameType::I, _) => new_type, + (_, FrameType::B) => FrameType::B, + _ => pic.pic_type, + }; + full_id = pic.full_id; + } else { + return Ok(());//Err(DecoderError::InvalidData); + } + validate!(self.cur_pps < self.pps.len() && self.pps[self.cur_pps].pic_parameter_set_id == slice_hdr.pic_parameter_set_id); + } + + let sps = &self.sps[self.cur_sps]; + let pps = &self.pps[self.cur_pps]; + + self.temporal_mv = !slice_hdr.direct_spatial_mv_pred; + self.is_s = slice_hdr.slice_type == SliceType::SI || slice_hdr.slice_type == SliceType::SP; + self.deblock_mode = slice_hdr.disable_deblocking_filter_idc; + self.lf_alpha = slice_hdr.slice_alpha_c0_offset; + self.lf_beta = slice_hdr.slice_beta_offset; + + self.frame_refs.select_refs(sps, &slice_hdr, full_id); + + if slice_hdr.adaptive_ref_pic_marking_mode { + self.frame_refs.apply_adaptive_marking(&slice_hdr.adaptive_ref_pic_marking, slice_hdr.frame_num, 1 << self.sps[self.cur_sps].log2_max_frame_num)?; + } + if slice_hdr.first_mb_in_slice == 0 { + let ret = supp.pool_u8.get_free(); + if ret.is_none() { + return Err(DecoderError::AllocError); + } + let tmp_vinfo = NAVideoInfo::new(self.width, self.height, false, YUV420_FORMAT); + let mut buf = ret.unwrap(); + if buf.get_info() != tmp_vinfo { + supp.pool_u8.reset(); + supp.pool_u8.prealloc_video(tmp_vinfo, 4)?; + let ret = supp.pool_u8.get_free(); + if ret.is_none() { + return Err(DecoderError::AllocError); + } + buf = ret.unwrap(); + } + self.cur_pic = Some(PictureInfo { + id: slice_hdr.frame_num, + full_id, + pic_type: slice_hdr.slice_type.to_frame_type(), + buf, + cur_mb: 0, + is_ref: nal_ref_idc != 0, + long_term: get_long_term_id(is_idr, &slice_hdr), + mv_info: FrameMV::new(sps.pic_width_in_mbs, sps.pic_height_in_mbs), + }); + } + + self.transform_8x8_mode = pps.transform_8x8_mode; + + self.sstate.reset(sps.pic_width_in_mbs, sps.pic_height_in_mbs, slice_hdr.first_mb_in_slice); + if !pps.entropy_coding_mode { + self.has_pic = self.decode_slice_cavlc(&mut br, &slice_hdr, full_size)?; + } else { + br.align(); + let start = (br.tell() / 8) as usize; + let csrc = &src[start..]; + validate!(csrc.len() >= 2); + let mut cabac = CABAC::new(csrc, slice_hdr.slice_type, slice_hdr.slice_qp, slice_hdr.cabac_init_idc as usize)?; + self.has_pic = self.decode_slice_cabac(&mut cabac, &slice_hdr)?; + } + }, + 2 => { // slice data partition A + //slice header + //slice id = read_ue() + //cat 2 slice data (all but MB layer residual) + return Err(DecoderError::NotImplemented); + }, + 3 => { // slice data partition B + //slice id = read_ue() + //if pps.redundant_pic_cnt_present { redundant_pic_cnt = read_ue() } + //cat 3 slice data (MB layer residual) + return Err(DecoderError::NotImplemented); + }, + 4 => { // slice data partition C + //slice id = read_ue() + //if pps.redundant_pic_cnt_present { redundant_pic_cnt = read_ue() } + //cat 4 slice data (MB layer residual) + return Err(DecoderError::NotImplemented); + }, + 6 => {}, //SEI + 7 => { + let sps = parse_sps(&src[1..])?; + self.sps.push(sps); + }, + 8 => { + validate!(full_size >= 8 + 16); + let pps = parse_pps(&src[1..], &self.sps, full_size - 8)?; + let mut found = false; + for stored_pps in self.pps.iter_mut() { + if stored_pps.pic_parameter_set_id == pps.pic_parameter_set_id { + *stored_pps = pps.clone(); + found = true; + break; + } + } + if !found { + self.pps.push(pps); + } + }, + 9 => { // access unit delimiter + }, + 10 => {}, //end of sequence + 11 => {}, //end of stream + 12 => {}, //filler + _ => {}, + }; + + Ok(()) + } + fn pred_mv(sstate: &mut SliceState, frame_refs: &FrameRefs, mb_info: &mut CurrentMBInfo, cur_id: u16, temporal_mv: bool, direct_8x8: bool) { + let mb_type = mb_info.mb_type; + if !mb_type.is_4x4() { + let (pw, ph) = mb_type.size(); + let mut xoff = 0; + let mut yoff = 0; + if mb_type == MBType::Direct || mb_type == MBType::BSkip { + sstate.predict_direct_mb(frame_refs, temporal_mv, direct_8x8, cur_id); + } + for part in 0..mb_type.num_parts() { + if !mb_type.is_l1(part) { + match mb_type { + MBType::PSkip => sstate.predict_pskip(), + MBType::BSkip | MBType::Direct => { + }, + _ => { + sstate.predict(xoff, yoff, pw, ph, 0, + mb_info.mv_l0[part], mb_info.ref_l0[part]); + }, + }; + } + if !mb_type.is_l0(part) && mb_type != MBType::BSkip && mb_type != MBType::Direct { + sstate.predict(xoff, yoff, pw, ph, 1, mb_info.mv_l1[part], mb_info.ref_l1[part]); + } + if pw != 16 { + xoff += pw; + } else { + yoff += ph; + } + } + } else { + for part in 0..4 { + let sub_type = mb_info.sub_mb_type[part]; + let mut xoff = (part & 1) * 8; + let mut yoff = (part & 2) * 4; + let orig_x = xoff; + let (pw, ph) = sub_type.size(); + for subpart in 0..sub_type.num_parts() { + if sub_type != SubMBType::Direct8x8 { + if !sub_type.is_l1() { + sstate.predict(xoff, yoff, pw, ph, 0, mb_info.mv_l0[part * 4 + subpart], mb_info.ref_l0[part]); + } + if !sub_type.is_l0() { + sstate.predict(xoff, yoff, pw, ph, 1, mb_info.mv_l1[part * 4 + subpart], mb_info.ref_l1[part]); + } + } else { + for sblk in 0..4 { + sstate.predict_direct_sub(frame_refs, temporal_mv, direct_8x8, cur_id, (xoff / 4) + (sblk & 1) + (yoff / 4) * 4 + (sblk & 2) * 2); + } + } + xoff += pw; + if xoff == orig_x + 8 { + xoff -= 8; + yoff += ph; + } + } + } + } + } + #[allow(clippy::cognitive_complexity)] + fn handle_macroblock(&mut self, slice_hdr: &SliceHeader, mb_info: &mut CurrentMBInfo) { + let pps = &self.pps[self.cur_pps]; + + let qp_y = mb_info.qp_y; + let qpr = ((qp_y as i8) + pps.chroma_qp_index_offset).max(0).min(51) as usize; + let qp_u = CHROMA_QUANTS[qpr]; + let qpb = ((qp_y as i8) + pps.second_chroma_qp_index_offset).max(0).min(51) as usize; + let qp_v = CHROMA_QUANTS[qpb]; + + let tx_bypass = qp_y == 0 && self.sps[self.cur_sps].qpprime_y_zero_transform_bypass; + + self.sstate.get_cur_mb().mb_type = mb_info.mb_type.into(); + if mb_info.mb_type != MBType::PCM { + self.sstate.get_cur_mb().qp_y = qp_y; + self.sstate.get_cur_mb().qp_u = qp_u; + self.sstate.get_cur_mb().qp_v = qp_v; + self.sstate.get_cur_mb().transform_8x8 = mb_info.transform_size_8x8; + } + let has_dc = mb_info.mb_type.is_intra16x16() && mb_info.coded[24]; + if has_dc { + idct_luma_dc(&mut mb_info.coeffs[24], qp_y); + for i in 0..16 { + mb_info.coeffs[i][0] = mb_info.coeffs[24][i]; + } + } + if !mb_info.transform_size_8x8 { + let quant_dc = !mb_info.mb_type.is_intra16x16(); + for i in 0..16 { + if mb_info.coded[i] { + if !tx_bypass { + idct(&mut mb_info.coeffs[i], qp_y, quant_dc); + } + } else if has_dc { + if !tx_bypass { + idct_dc(&mut mb_info.coeffs[i], qp_y, quant_dc); + } + mb_info.coded[i] = true; + } + } + } else { + for i in 0..4 { + if mb_info.coded[(i & 1) * 2 + (i & 2) * 4] && !tx_bypass { + dequant8x8(&mut mb_info.coeffs8x8[i].coeffs, &pps.scaling_list_8x8[!mb_info.mb_type.is_intra() as usize]); + idct8x8(&mut mb_info.coeffs8x8[i].coeffs, qp_y); + } + } + } + for chroma in 0..2 { + let qp_c = if chroma == 0 { qp_u } else { qp_v }; + if mb_info.cbpc != 0 { + chroma_dc_transform(&mut mb_info.chroma_dc[chroma], qp_c); + } + for i in 0..4 { + let blk_no = 16 + chroma * 4 + i; + mb_info.coeffs[blk_no][0] = mb_info.chroma_dc[chroma][i]; + if mb_info.coded[blk_no] { + idct(&mut mb_info.coeffs[blk_no], qp_c, false); + } else if mb_info.coeffs[blk_no][0] != 0 { + idct_dc(&mut mb_info.coeffs[blk_no], qp_c, false); + mb_info.coded[blk_no] = true; + } + } + } + if !pps.entropy_coding_mode || mb_info.mb_type.is_skip() || mb_info.mb_type.is_intra() { + self.sstate.reset_mb_mv(); + } + if !mb_info.mb_type.is_intra() { + Self::pred_mv(&mut self.sstate, &self.frame_refs, mb_info, self.cur_id, self.temporal_mv, self.sps[self.cur_sps].direct_8x8_inference); + } + if !pps.constrained_intra_pred && mb_info.mb_type != MBType::Intra4x4 && mb_info.mb_type != MBType::Intra8x8 { + self.sstate.fill_ipred(IntraPredMode::DC); + } + + let xpos = self.sstate.mb_x * 16; + let ypos = self.sstate.mb_y * 16; + if let Some(ref mut pic) = self.cur_pic { + let mut frm = NASimpleVideoFrame::from_video_buf(&mut pic.buf).unwrap(); + if mb_info.mb_type != MBType::PCM { + let weight_mode = if self.pps[self.cur_pps].weighted_pred && slice_hdr.slice_type.is_p() { + 1 + } else if slice_hdr.slice_type.is_b() { + self.pps[self.cur_pps].weighted_bipred_idc + } else { + 0 + }; + recon_mb(&mut frm, slice_hdr, mb_info, &mut self.sstate, &self.frame_refs, &mut self.mc_dsp, weight_mode); + } else { + for (dline, src) in frm.data[frm.offset[0] + xpos + ypos * frm.stride[0]..].chunks_mut(frm.stride[0]).take(16).zip(self.ipcm_buf.chunks(16)) { + dline[..16].copy_from_slice(src); + } + for (dline, src) in frm.data[frm.offset[1] + xpos/2 + ypos/2 * frm.stride[1]..].chunks_mut(frm.stride[1]).take(8).zip(self.ipcm_buf[256..].chunks(8)) { + dline[..8].copy_from_slice(src); + } + for (dline, src) in frm.data[frm.offset[2] + xpos/2 + ypos/2 * frm.stride[2]..].chunks_mut(frm.stride[2]).take(8).zip(self.ipcm_buf[256 + 64..].chunks(8)) { + dline[..8].copy_from_slice(src); + } + } +/*match mb_info.mb_type { +MBType::BSkip | MBType::Direct | MBType::B16x16(_) | MBType::B16x8(_, _) | MBType::B8x16(_, _) | MBType::B8x8 => { + let dstride = frm.stride[0]; + let dst = &mut frm.data[frm.offset[0] + self.sstate.mb_x * 16 + self.sstate.mb_y * 16 * dstride..]; + for el in dst[..16].iter_mut() { *el = 255; } + for row in dst.chunks_mut(dstride).skip(1).take(15) { + row[0] = 255; + } +}, +_ => {}, +};*/ + self.sstate.save_ipred_context(&frm); + } + if let Some(ref mut pic) = self.cur_pic { + let mv_info = &mut pic.mv_info; + let mb_pos = self.sstate.mb_x + self.sstate.mb_y * mv_info.mb_stride; + let mut mb = FrameMBInfo::new(); + mb.mb_type = mb_info.mb_type.into(); + for blk4 in 0..16 { + mb.mv[blk4] = self.sstate.get_cur_blk4(blk4).mv; + } + for blk8 in 0..4 { + mb.ref_poc[blk8] = self.frame_refs.map_refs(self.sstate.get_cur_blk8(blk8).ref_idx); + mb.ref_idx[blk8] = self.sstate.get_cur_blk8(blk8).ref_idx; + } + mv_info.mbs[mb_pos] = mb; + } + if !self.deblock_skip && self.deblock_mode != 1 { + self.sstate.fill_deblock(&self.frame_refs, self.deblock_mode, self.is_s); + if let Some(ref mut pic) = self.cur_pic { + let mut frm = NASimpleVideoFrame::from_video_buf(&mut pic.buf).unwrap(); + loop_filter_mb(&mut frm, &self.sstate, self.lf_alpha, self.lf_beta); + } + } + self.sstate.next_mb(); + } + fn decode_slice_cavlc(&mut self, br: &mut BitReader, slice_hdr: &SliceHeader, full_size: usize) -> DecoderResult { + const INTRA_CBP: [u8; 48] = [ + 47, 31, 15, 0, 23, 27, 29, 30, 7, 11, 13, 14, 39, 43, 45, 46, + 16, 3, 5, 10, 12, 19, 21, 26, 28, 35, 37, 42, 44, 1, 2, 4, + 8, 17, 18, 20, 24, 6, 9, 22, 25, 32, 33, 34, 36, 40, 38, 41 + ]; + const INTER_CBP: [u8; 48] = [ + 0, 16, 1, 2, 4, 8, 32, 3, 5, 10, 12, 15, 47, 7, 11, 13, + 14, 6, 9, 31, 35, 37, 42, 44, 33, 34, 36, 40, 39, 43, 45, 46, + 17, 18, 20, 24, 19, 21, 26, 28, 23, 27, 29, 30, 22, 25, 38, 41 + ]; + + let mut mb_idx = slice_hdr.first_mb_in_slice as usize; + let mut mb_info = CurrentMBInfo { qp_y: slice_hdr.slice_qp, ..Default::default() }; + let skip_type = if slice_hdr.slice_type.is_p() { MBType::PSkip } else { MBType::BSkip }; + while br.tell() < full_size && mb_idx < self.num_mbs { + mb_info.coded = [false; 25]; + mb_info.ref_l0 = [ZERO_REF; 4]; + mb_info.ref_l1 = [ZERO_REF; 4]; + mb_info.mv_l0 = [ZERO_MV; 16]; + mb_info.mv_l1 = [ZERO_MV; 16]; + mb_info.chroma_dc = [[0; 4]; 2]; + mb_info.cbpy = 0; + mb_info.cbpc = 0; + + if !slice_hdr.slice_type.is_intra() { + let mb_skip_run = br.read_ue()? as usize; + validate!(mb_idx + mb_skip_run <= self.num_mbs); + mb_info.mb_type = skip_type; + for _ in 0..mb_skip_run { + self.handle_macroblock(slice_hdr, &mut mb_info); + mb_idx += 1; + } + if mb_idx == self.num_mbs || br.tell() >= full_size { + break; + } + } + if br.tell() < full_size { + if self.is_mbaff && ((mb_idx & 1) == 0) { + let _mb_field_decoding = br.read_bool()?; + } + let mut mb_type = decode_mb_type_cavlc(br, slice_hdr)?; + mb_info.mb_type = mb_type; + mb_info.transform_size_8x8 = false; + if mb_type == MBType::PCM { + br.align(); + for pix in self.ipcm_buf[..256 + 64 + 64].iter_mut() { + *pix = br.read(8)? as u8; + } + self.sstate.fill_ncoded(16); + } else { + if self.transform_8x8_mode && mb_type == MBType::Intra4x4 { + mb_info.transform_size_8x8 = br.read_bool()?; + if mb_info.transform_size_8x8 { + mb_type = MBType::Intra8x8; + mb_info.mb_type = MBType::Intra8x8; + } + } + decode_mb_pred_cavlc(br, slice_hdr, mb_type, &mut self.sstate, &mut mb_info)?; + let (cbpy, cbpc) = if let MBType::Intra16x16(_, cbpy, cbpc) = mb_type { + (cbpy, cbpc) + } else { + let cbp_id = br.read_ue()? as usize; + validate!(cbp_id < INTRA_CBP.len()); + let cbp = if mb_type == MBType::Intra4x4 || mb_type == MBType::Intra8x8 { + INTRA_CBP[cbp_id] + } else { + INTER_CBP[cbp_id] + }; + if self.transform_8x8_mode && (cbp & 0xF) != 0 && mb_info.can_have_8x8_tx(self.sps[self.cur_sps].direct_8x8_inference) { + mb_info.transform_size_8x8 = br.read_bool()?; + } + ((cbp & 0xF), (cbp >> 4)) + }; + mb_info.cbpy = cbpy; + mb_info.cbpc = cbpc; + self.sstate.get_cur_mb().cbp = (cbpc << 4) | cbpy; + if cbpy != 0 || cbpc != 0 || mb_type.is_intra16x16() { + let mb_qp_delta = br.read_se()?; + validate!(mb_qp_delta >= -26 && mb_qp_delta <= 25); + let new_qp = mb_qp_delta + i32::from(mb_info.qp_y); + mb_info.qp_y = if new_qp < 0 { + (new_qp + 52) as u8 + } else if new_qp >= 52 { + (new_qp - 52) as u8 + } else { + new_qp as u8 + }; + mb_info.coeffs = [[0; 16]; 25]; + if self.transform_8x8_mode { + mb_info.clear_coeffs8x8(); + } + mb_info.chroma_dc = [[0; 4]; 2]; + decode_residual_cavlc(br, &mut self.sstate, &mut mb_info, &self.cavlc_cb)?; + } + } + self.handle_macroblock(slice_hdr, &mut mb_info); + } + mb_idx += 1; + } + if let Some(ref mut pic) = self.cur_pic { + pic.cur_mb = mb_idx; + } + Ok(mb_idx == self.num_mbs) + } + fn decode_slice_cabac(&mut self, cabac: &mut CABAC, slice_hdr: &SliceHeader) -> DecoderResult { + let mut mb_idx = slice_hdr.first_mb_in_slice as usize; + let mut prev_mb_skipped = false; + let skip_type = if slice_hdr.slice_type.is_p() { MBType::PSkip } else { MBType::BSkip }; + let mut last_qp_diff = false; + + let mut mb_info = CurrentMBInfo { qp_y: slice_hdr.slice_qp, ..Default::default() }; + + while mb_idx < self.num_mbs { + mb_info.coded = [false; 25]; + mb_info.ref_l0 = [ZERO_REF; 4]; + mb_info.ref_l1 = [ZERO_REF; 4]; + mb_info.mv_l0 = [ZERO_MV; 16]; + mb_info.mv_l1 = [ZERO_MV; 16]; + mb_info.chroma_dc = [[0; 4]; 2]; + mb_info.cbpy = 0; + mb_info.cbpc = 0; + let mb_skip = cabac_decode_mbskip(cabac, &self.sstate, slice_hdr); + if !mb_skip { + if self.is_mbaff && (((mb_idx & 1) == 0) || (prev_mb_skipped && ((mb_idx & 1) == 1))) { + let _mb_field_decoding = cabac.decode_bit(70); + } + let mut mb_type = cabac_decode_mb_type(cabac, slice_hdr, &self.sstate); + mb_info.mb_type = mb_type; + mb_info.transform_size_8x8 = false; + if mb_type == MBType::PCM { + let ipcm_size = 256 + 64 + 64; + validate!(cabac.pos + ipcm_size <= cabac.src.len()); + self.ipcm_buf[..ipcm_size].copy_from_slice(&cabac.src[cabac.pos..][..ipcm_size]); + cabac.pos += ipcm_size; + cabac.reinit()?; + last_qp_diff = false; + } else { + if self.transform_8x8_mode && mb_type == MBType::Intra4x4 { + let mut ctx = 0; + if self.sstate.get_top_mb().transform_8x8 { + ctx += 1; + } + if self.sstate.get_left_mb().transform_8x8 { + ctx += 1; + } + mb_info.transform_size_8x8 = cabac.decode_bit(399 + ctx); + if mb_info.transform_size_8x8 { + mb_type = MBType::Intra8x8; + mb_info.mb_type = MBType::Intra8x8; + } + } + decode_mb_pred_cabac(cabac, slice_hdr, mb_type, &mut self.sstate, &mut mb_info); + let (cbpy, cbpc) = if let MBType::Intra16x16(_, cbpy, cbpc) = mb_type { + (cbpy, cbpc) + } else { + decode_cbp_cabac(cabac, &self.sstate) + }; + if self.transform_8x8_mode && cbpy != 0 && mb_info.can_have_8x8_tx(self.sps[self.cur_sps].direct_8x8_inference) { + let mut ctx = 0; + if self.sstate.get_top_mb().transform_8x8 { + ctx += 1; + } + if self.sstate.get_left_mb().transform_8x8 { + ctx += 1; + } + mb_info.transform_size_8x8 = cabac.decode_bit(399 + ctx); + } + if mb_type.is_intra() { + self.sstate.get_cur_mb().cmode = mb_info.chroma_ipred; + } + mb_info.cbpy = cbpy; + mb_info.cbpc = cbpc; + self.sstate.get_cur_mb().cbp = (cbpc << 4) | cbpy; + if cbpy != 0 || cbpc != 0 || mb_type.is_intra16x16() { + let mb_qp_delta = decode_mb_qp_delta_cabac(cabac, last_qp_diff as usize); + validate!(mb_qp_delta >= -26 && mb_qp_delta <= 25); + last_qp_diff = mb_qp_delta != 0; + let new_qp = mb_qp_delta + i32::from(mb_info.qp_y); + mb_info.qp_y = if new_qp < 0 { + (new_qp + 52) as u8 + } else if new_qp >= 52 { + (new_qp - 52) as u8 + } else { + new_qp as u8 + }; + mb_info.coeffs = [[0; 16]; 25]; + if self.transform_8x8_mode { + mb_info.clear_coeffs8x8(); + } + mb_info.chroma_dc = [[0; 4]; 2]; + decode_residual_cabac(cabac, &mut self.sstate, &mut mb_info); + } else { + last_qp_diff = false; + } + } + } else { + mb_info.mb_type = skip_type; + mb_info.transform_size_8x8 = false; + last_qp_diff = false; + } + self.handle_macroblock(slice_hdr, &mut mb_info); + prev_mb_skipped = mb_skip; + if !(self.is_mbaff && ((mb_idx & 1) == 0)) && cabac.decode_terminate() { + if let Some(ref mut pic) = self.cur_pic { + pic.cur_mb = mb_idx + 1; + } + return Ok(mb_idx + 1 == self.num_mbs); + } + mb_idx += 1; + } + Err(DecoderError::InvalidData) + } +} + +impl NADecoder for H264Decoder { + fn init(&mut self, supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> { + if let NACodecTypeInfo::Video(vinfo) = info.get_properties() { + let fmt = YUV420_FORMAT; + let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(0, 0, false, fmt)); + self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref(); + + let edata = info.get_extradata().unwrap(); +//print!("edata:"); for &el in edata.iter() { print!(" {:02X}", el); } println!(); + if edata.len() > 11 && &edata[0..4] == b"avcC" { + let mut mr = MemoryReader::new_read(edata.as_slice()); + let mut br = ByteReader::new(&mut mr); + let mut nal_buf = Vec::new(); + + br.read_skip(4)?; + let version = br.read_byte()?; + validate!(version == 1); + let profile = br.read_byte()?; + let _compatibility = br.read_byte()?; + let _level = br.read_byte()?; + let b = br.read_byte()?; + validate!((b & 0xFC) == 0xFC); + self.nal_len = (b & 3) + 1; + let b = br.read_byte()?; + validate!((b & 0xE0) == 0xE0); + let num_sps = (b & 0x1F) as usize; + for _ in 0..num_sps { + let len = br.read_u16be()? as usize; + let offset = br.tell() as usize; + validate!((br.peek_byte()? & 0x1F) == 7); + let _size = unescape_nal(&edata[offset..][..len], &mut nal_buf); + self.handle_nal(&nal_buf, supp, true)?; + br.read_skip(len)?; + } + let num_pps = br.read_byte()? as usize; + for _ in 0..num_pps { + let len = br.read_u16be()? as usize; + let offset = br.tell() as usize; + validate!((br.peek_byte()? & 0x1F) == 8); + let _size = unescape_nal(&edata[offset..][..len], &mut nal_buf); + self.handle_nal(&nal_buf, supp, true)?; + br.read_skip(len)?; + } + if br.left() > 0 { + match profile { + 100 | 110 | 122 | 144 => { + let b = br.read_byte()?; + validate!((b & 0xFC) == 0xFC); + // b & 3 -> chroma format + let b = br.read_byte()?; + validate!((b & 0xF8) == 0xF8); + // b & 7 -> luma depth minus 8 + let b = br.read_byte()?; + validate!((b & 0xF8) == 0xF8); + // b & 7 -> chroma depth minus 8 + let num_spsext = br.read_byte()? as usize; + for _ in 0..num_spsext { + let len = br.read_u16be()? as usize; + // parse spsext + br.read_skip(len)?; + } + }, + _ => {}, + }; + } + } else { + return Err(DecoderError::NotImplemented); + } + + self.width = vinfo.get_width(); + self.height = vinfo.get_height(); + + if (self.width == 0 || self.height == 0) && !self.sps.is_empty() { + self.width = self.sps[0].pic_width_in_mbs * 16; + self.height = self.sps[0].pic_height_in_mbs * 16; + } + + let num_bufs = if !self.sps.is_empty() { + self.sps[0].num_ref_frames as usize + 1 + } else { + 3 + }.max(16 + 1); + supp.pool_u8.set_dec_bufs(num_bufs); + supp.pool_u8.prealloc_video(NAVideoInfo::new(self.width, self.height, false, fmt), 4)?; + + Ok(()) + } else { + Err(DecoderError::InvalidData) + } + } + fn decode(&mut self, supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult { + let src = pkt.get_buffer(); + + let mut mr = MemoryReader::new_read(&src); + let mut br = ByteReader::new(&mut mr); + let mut nal_buf = Vec::with_capacity(src.len()); + if self.nal_len > 0 { + let mut skip_decoding = false; + if self.skip_mode != FrameSkipMode::None { + let mut pic_type = FrameType::I; + let mut is_ref = false; + while br.left() > 0 { + let size = match self.nal_len { + 1 => br.read_byte()? as usize, + 2 => br.read_u16be()? as usize, + 3 => br.read_u24be()? as usize, + 4 => br.read_u32be()? as usize, + _ => unreachable!(), + }; + validate!(br.left() >= (size as i64)); + let offset = br.tell() as usize; + let size = unescape_nal(&src[offset..][..size], &mut nal_buf); + validate!(size > 0); + let nal_ref_idc = nal_buf[0] >> 5; + let nal_unit_type = nal_buf[0] & 0x1F; + if nal_unit_type == 1 || nal_unit_type == 5 { + let mut bitr = BitReader::new(&nal_buf[1..], BitReaderMode::BE); + let (first_mb, slice_type) = parse_slice_header_minimal(&mut bitr)?; + if first_mb == 0 && nal_ref_idc != 0 { + is_ref = true; + } + let new_type = slice_type.to_frame_type(); + pic_type = match (pic_type, new_type) { + (FrameType::I, _) => new_type, + (_, FrameType::B) => FrameType::B, + _ => pic_type, + }; + } + br.read_skip(size)?; + } + match self.skip_mode { + FrameSkipMode::IntraOnly => { + skip_decoding = pic_type != FrameType::I; + }, + FrameSkipMode::KeyframesOnly => { + if !is_ref { + skip_decoding = true; + } + }, + _ => {}, + }; + br.seek(SeekFrom::Start(0))?; + } + while br.left() > 0 { + let size = match self.nal_len { + 1 => br.read_byte()? as usize, + 2 => br.read_u16be()? as usize, + 3 => br.read_u24be()? as usize, + 4 => br.read_u32be()? as usize, + _ => unreachable!(), + }; + validate!(br.left() >= (size as i64)); + let offset = br.tell() as usize; + let _size = unescape_nal(&src[offset..][..size], &mut nal_buf); + self.handle_nal(nal_buf.as_slice(), supp, skip_decoding)?; + br.read_skip(size)?; + } + } else { +//todo NAL detection + unimplemented!(); + } + + let (bufinfo, ftype, dts) = if self.has_pic && self.cur_pic.is_some() { + let mut npic = None; + std::mem::swap(&mut self.cur_pic, &mut npic); + let cpic = npic.unwrap(); + let ret = (NABufferType::Video(cpic.buf.clone()), cpic.pic_type, Some(u64::from(cpic.full_id))); + if cpic.is_ref { + self.frame_refs.add_short_term(cpic.clone(), self.sps[self.cur_sps].num_ref_frames); + } + if let Some(lt_idx) = cpic.long_term { + self.frame_refs.add_long_term(lt_idx, cpic); + } + ret + } else { + (NABufferType::None, FrameType::Skip, None) + }; + + let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo); + frm.set_keyframe(ftype == FrameType::I); + if let (Some(mydts), None) = (dts, frm.get_dts()) { + frm.set_dts(Some(mydts)); + } + if let Some(dts) = dts { + frm.set_id(dts as i64); + } + frm.set_frame_type(ftype); + Ok(frm.into_ref()) + } + fn flush(&mut self) { + } +} + +impl NAOptionHandler for H264Decoder { + fn get_supported_options(&self) -> &[NAOptionDefinition] { DECODER_OPTIONS } + fn set_options(&mut self, options: &[NAOption]) { + for option in options.iter() { + for opt_def in DECODER_OPTIONS.iter() { + if opt_def.check(option).is_ok() { + match (option.name, &option.value) { + (FRAME_SKIP_OPTION, NAValue::String(ref strval)) => { + if let Ok(smode) = FrameSkipMode::from_str(strval) { + self.skip_mode = smode; + } + }, + (DEBLOCK_SKIP_OPTION, NAValue::Bool(val)) => { + self.deblock_skip = *val; + }, + _ => {}, + } + } + } + } + } + fn query_option_value(&self, name: &str) -> Option { + match name { + FRAME_SKIP_OPTION => Some(NAValue::String(self.skip_mode.to_string())), + DEBLOCK_SKIP_OPTION => Some(NAValue::Bool(self.deblock_skip)), + _ => None, + } + } +} + +pub fn get_decoder() -> Box { + Box::new(H264Decoder::new()) +}