--- /dev/null
+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<SeqParameterSet>,
+ cur_sps: usize,
+ pps: Vec<PicParameterSet>,
+ cur_pps: usize,
+
+ skip_mode: FrameSkipMode,
+ deblock_skip: bool,
+
+ is_mbaff: bool,
+
+ cavlc_cb: CAVLCTables,
+
+ sstate: SliceState,
+
+ cur_pic: Option<PictureInfo>,
+ 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<bool> {
+ 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<bool> {
+ 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<NAFrameRef> {
+ 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<NAValue> {
+ 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<dyn NADecoder + Send> {
+ Box::new(H264Decoder::new())
+}
projects / nihav.git / blobdiff