--- /dev/null
+/* TODO:
+ * buffer pool for DSP avg frames
+*/
+
+use nihav_core::codecs::*;
+use nihav_core::io::bitreader::*;
+
+use super::*;
+use super::dispatch::*;
+
+pub struct FrameDecoder {
+ pub slices: Vec<(SliceHeader, usize, SliceRefs, Vec<u8>)>,
+ pub cur_pic: PictureInfo,
+ sps: Arc<SeqParameterSet>,
+ pps: Arc<PicParameterSet>,
+ pub num_mbs: usize,
+ mc_dsp: H264MC,
+ dispatch: Shareable<ThreadDispatcher>,
+ sstate: SliceState,
+ cavlc_cb: Arc<CAVLCTables>,
+ ipcm_buf: [u8; 256 + 64 + 64],
+ is_mbaff: bool,
+ deblock_skip: bool,
+}
+
+impl FrameDecoder {
+ pub fn decode_slice(&mut self, hdr: &SliceHeader, hdr_size: usize, refs: &SliceRefs, nal: &[u8]) -> DecoderResult<usize> {
+ self.sstate.reset(self.sps.pic_width_in_mbs, self.sps.pic_height_in_mbs, hdr.first_mb_in_slice);
+
+ let mut full_size = nal.len() * 8;
+ for &byte in nal.iter().rev() {
+ if byte == 0 {
+ full_size -= 8;
+ } else {
+ full_size -= (byte.trailing_zeros() + 1) as usize;
+ break;
+ }
+ }
+ validate!(full_size > 0);
+
+ let mut br = BitReader::new(&nal[hdr_size / 8..], BitReaderMode::BE);
+ if !self.pps.entropy_coding_mode {
+ br.skip((hdr_size & 7) as u32)?;
+ self.decode_slice_cavlc(&mut br, full_size - (hdr_size & !7), hdr, refs)
+ } else {
+ let csrc = &nal[(hdr_size + 7) / 8..];
+ validate!(csrc.len() >= 2);
+ let mut cabac = CABAC::new(csrc, hdr.slice_type, hdr.slice_qp, hdr.cabac_init_idc as usize)?;
+ self.decode_slice_cabac(&mut cabac, hdr, refs)
+ }
+ }
+ fn decode_slice_cavlc(&mut self, br: &mut BitReader, full_size: usize, slice_hdr: &SliceHeader, refs: &SliceRefs) -> DecoderResult<usize> {
+ 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, refs)?;
+ 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.pps.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.pps.transform_8x8_mode && (cbp & 0xF) != 0 && mb_info.can_have_8x8_tx(self.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.pps.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, refs)?;
+ }
+ mb_idx += 1;
+ if let Ok(disp) = self.dispatch.read() {
+ disp.update_pos(self.cur_pic.full_id, mb_idx);
+ }
+ }
+ Ok(mb_idx)
+ }
+ fn decode_slice_cabac(&mut self, cabac: &mut CABAC, slice_hdr: &SliceHeader, refs: &SliceRefs) -> DecoderResult<usize> {
+ 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.pps.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.pps.transform_8x8_mode && cbpy != 0 && mb_info.can_have_8x8_tx(self.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.pps.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, refs)?;
+ prev_mb_skipped = mb_skip;
+ if !(self.is_mbaff && ((mb_idx & 1) == 0)) && cabac.decode_terminate() {
+ if let Ok(disp) = self.dispatch.read() {
+ disp.update_pos(self.cur_pic.full_id, mb_idx + 1);
+ }
+ return Ok(mb_idx + 1);
+ }
+ mb_idx += 1;
+ if let Ok(disp) = self.dispatch.read() {
+ disp.update_pos(self.cur_pic.full_id, mb_idx);
+ }
+ }
+ Err(DecoderError::InvalidData)
+ }
+ #[allow(clippy::cognitive_complexity)]
+ fn handle_macroblock(&mut self, slice_hdr: &SliceHeader, mb_info: &mut CurrentMBInfo, refs: &SliceRefs) -> DecoderResult<()> {
+ let qp_y = mb_info.qp_y;
+ let qpr = ((qp_y as i8) + self.pps.chroma_qp_index_offset).max(0).min(51) as usize;
+ let qp_u = CHROMA_QUANTS[qpr];
+ let qpb = ((qp_y as i8) + self.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.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, &self.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 !self.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() {
+ let temporal_mv = !slice_hdr.direct_spatial_mv_pred;
+ let cur_id = self.cur_pic.full_id as u16;
+ // wait for the reference macroblock MV to be available
+ if matches!(mb_info.mb_type, MBType::Direct | MBType::BSkip | MBType::B8x8) {
+ if let Some(ref_id) = refs.get_ref_id(0, mb_info.ref_l1[0].index()) {
+ wait_for_mb(&self.dispatch, &self.sstate, self.sstate.mb_x * 16, self.sstate.mb_y * 16, ZERO_MV, ref_id)?;
+ }
+ }
+ Self::pred_mv(&mut self.sstate, refs, mb_info, cur_id, temporal_mv, self.sps.direct_8x8_inference);
+ }
+ if !self.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;
+ let mut frm = NASimpleVideoFrame::from_video_buf(&mut self.cur_pic.buf).unwrap();
+ if mb_info.mb_type != MBType::PCM {
+ let weight_mode = if self.pps.weighted_pred && slice_hdr.slice_type.is_p() {
+ 1
+ } else if slice_hdr.slice_type.is_b() {
+ self.pps.weighted_bipred_idc
+ } else {
+ 0
+ };
+ recon_mb_mt(&mut frm, slice_hdr, mb_info, &mut self.sstate, refs, &mut self.mc_dsp, weight_mode, &self.dispatch)?;
+ } 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);
+ }
+ }
+ self.sstate.save_ipred_context(&frm);
+
+ let mv_info = &mut self.cur_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] = 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;
+
+ let deblock_mode = slice_hdr.disable_deblocking_filter_idc;
+ if !self.deblock_skip && deblock_mode != 1 {
+ let is_s = slice_hdr.slice_type == SliceType::SI || slice_hdr.slice_type == SliceType::SP;
+ self.sstate.fill_deblock(refs, deblock_mode, is_s);
+ let mut frm = NASimpleVideoFrame::from_video_buf(&mut self.cur_pic.buf).unwrap();
+ let lf_alpha = slice_hdr.slice_alpha_c0_offset;
+ let lf_beta = slice_hdr.slice_beta_offset;
+ loop_filter_mb(&mut frm, &self.sstate, lf_alpha, lf_beta);
+ }
+ self.sstate.next_mb();
+ Ok(())
+ }
+
+ fn pred_mv(sstate: &mut SliceState, frame_refs: &SliceRefs, 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;
+ }
+ }
+ }
+ }
+ }
+}
+
+struct H264MTDecoder {
+ info: NACodecInfoRef,
+ nal_len: u8,
+ dispatch: Shareable<ThreadDispatcher>,
+ frame_refs: FrameRefs,
+ skip_mode: FrameSkipMode,
+ sps: Vec<Arc<SeqParameterSet>>,
+ cur_sps: usize,
+ pps: Vec<Arc<PicParameterSet>>,
+ cur_pps: usize,
+ cur_fdec: Option<FrameDecoder>,
+ cavlc_cb: Arc<CAVLCTables>,
+ deblock_skip: bool,
+ max_last_poc: u32,
+ poc_base: u32,
+}
+
+impl H264MTDecoder {
+ fn new() -> Self {
+ Self {
+ info: NACodecInfoRef::default(),
+ nal_len: 0,
+ dispatch: Arc::new(RwLock::new(ThreadDispatcher::new())),
+ frame_refs: FrameRefs::new(),
+ skip_mode: FrameSkipMode::default(),
+ sps: Vec::new(),
+ cur_sps: 0,
+ pps: Vec::new(),
+ cur_pps: 0,
+ cur_fdec: None,
+ cavlc_cb: Arc::new(CAVLCTables::new()),
+ deblock_skip: false,
+ max_last_poc: 0,
+ poc_base: 0,
+ }
+ }
+ fn handle_nal(&mut self, src: Vec<u8>, supp: &mut NADecoderSupport, skip_decoding: bool, user_id: u32, time: NATimeInfo) -> 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.as_slice(), self.pps.as_slice(), is_idr, nal_ref_idc)?;
+ let hdr_size = br.tell();
+ validate!(br.tell() < full_size);
+ let full_id;
+ if slice_hdr.first_mb_in_slice == 0 {
+ validate!(self.cur_fdec.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;
+ }
+ }
+
+ let mut cur_full_id = self.frame_refs.calc_picture_num(&slice_hdr, is_idr, nal_ref_idc, &self.sps[self.cur_sps]) + self.poc_base;
+ if is_idr {
+ if cur_full_id <= self.max_last_poc {
+ self.poc_base = self.max_last_poc + 2 - (cur_full_id - self.poc_base);
+ cur_full_id = self.max_last_poc + 2;
+ }
+ }
+ self.max_last_poc = self.max_last_poc.max(cur_full_id);
+ full_id = cur_full_id;
+
+ 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);
+ }
+
+ if is_idr {
+ self.frame_refs.clear_refs();
+ }
+
+ let width = sps.pic_width_in_mbs << 4;
+ let height = sps.pic_height_in_mbs << 4;
+ let num_mbs = sps.pic_width_in_mbs * sps.pic_height_in_mbs;
+
+ 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();
+ let mut mc_dsp = H264MC::new(avg_buf);
+ mc_dsp.set_dimensions(width, height);
+
+ let is_mbaff = sps.mb_adaptive_frame_field && !slice_hdr.field_pic;
+ if is_mbaff {
+ println!("MBAFF");
+ return Err(DecoderError::NotImplemented);
+ }
+ if !sps.frame_mbs_only {
+ println!("PAFF?");
+ return Err(DecoderError::NotImplemented);
+ }
+
+ let cur_vinfo = supp.pool_u8.get_info();
+ let tmp_vinfo = NAVideoInfo::new(width, height, false, YUV420_FORMAT);
+ if cur_vinfo != Some(tmp_vinfo) {
+ supp.pool_u8.reset();
+ supp.pool_u8.prealloc_video(tmp_vinfo, 4)?;
+ }
+
+ let buf = if let Some(pic) = supp.pool_u8.get_free() {
+ pic
+ } else {
+ if supp.pool_u8.get_num_used() > 256 {
+ return Err(DecoderError::AllocError);
+ }
+ if let Ok(nbuf) = alloc_video_buffer(tmp_vinfo, 4) {
+ let vbuf = nbuf.get_vbuf().unwrap();
+ supp.pool_u8.add_frame(vbuf.clone());
+ vbuf
+ } else {
+ return Err(DecoderError::AllocError);
+ }
+ };
+
+ let cur_pic = PictureInfo {
+ id: slice_hdr.frame_num,
+ full_id, user_id, time,
+ pic_type: slice_hdr.slice_type.to_frame_type(),
+ buf,
+ cur_mb: 0,
+ is_ref: nal_ref_idc != 0,
+ is_idr,
+ long_term: get_long_term_id(is_idr, &slice_hdr),
+ mv_info: NABufferRef::new(FrameMV::new(sps.pic_width_in_mbs, sps.pic_height_in_mbs)),
+ };
+
+ self.cur_fdec = Some(FrameDecoder{
+ slices: Vec::new(),
+ sstate: SliceState::new(),
+ ipcm_buf: [0; 256 + 64 + 64],
+ //width, height,
+ num_mbs,
+ sps: Arc::clone(sps),
+ pps: Arc::clone(&self.pps[self.cur_pps]),
+ dispatch: Arc::clone(&self.dispatch),
+ cavlc_cb: Arc::clone(&self.cavlc_cb),
+ mc_dsp,
+ cur_pic,
+ is_mbaff,
+ deblock_skip: self.deblock_skip,
+ });
+ } else {
+ if let Some(ref mut fdec) = self.cur_fdec {
+ let new_type = slice_hdr.slice_type.to_frame_type();
+ let pic = &mut fdec.cur_pic;
+ 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(());
+ }
+ }
+
+ let sps = &self.sps[self.cur_sps];
+
+ 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 let Some(ref mut fdec) = self.cur_fdec {
+ fdec.slices.push((slice_hdr, hdr_size, self.frame_refs.cur_refs.clone(), src));
+ }
+ },
+ 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(Arc::new(sps));
+ },
+ 8 => {
+ validate!(full_size >= 8 + 16);
+ let pps = parse_pps(&src[1..], self.sps.as_slice(), 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 = Arc::clone(&pps);
+ found = true;
+ break;
+ }
+ }
+ if !found {
+ self.pps.push(pps);
+ }
+ },
+ 9 => { // access unit delimiter
+ },
+ 10 => {}, //end of sequence
+ 11 => {}, //end of stream
+ 12 => {}, //filler
+ _ => {},
+ };
+
+ Ok(())
+ }
+}
+
+impl NADecoderMT for H264MTDecoder {
+ fn init(&mut self, supp: &mut NADecoderSupport, info: NACodecInfoRef, nthreads: usize) -> 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);
+
+ 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 mut nal_buf = Vec::new();
+ let _size = unescape_nal(&edata[offset..][..len], &mut nal_buf);
+ self.handle_nal(nal_buf, supp, true, 0, NATimeInfo::new(None, None, None, 0, 0))?;
+ 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 mut nal_buf = Vec::new();
+ let _size = unescape_nal(&edata[offset..][..len], &mut nal_buf);
+ self.handle_nal(nal_buf, supp, true, 0, NATimeInfo::new(None, None, None, 0, 0))?;
+ 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);
+ }
+
+ let mut width = vinfo.get_width();
+ let mut height = vinfo.get_height();
+
+ if (width == 0 || height == 0) && !self.sps.is_empty() {
+ width = self.sps[0].pic_width_in_mbs * 16;
+ 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);
+ if let Ok(ref mut sd) = self.dispatch.write() {
+ sd.max_threads = nthreads;
+ } else {
+ return Err(DecoderError::Bug);
+ }
+ supp.pool_u8.set_dec_bufs(num_bufs + nthreads);
+ supp.pool_u8.prealloc_video(NAVideoInfo::new(width, height, false, fmt), 4)?;
+
+ Ok(())
+ } else {
+ Err(DecoderError::InvalidData)
+ }
+ }
+ fn can_take_input(&mut self) -> bool {
+ if let Ok(ref sd) = self.dispatch.read() {
+ sd.can_decode_more()
+ } else {
+ false
+ }
+ }
+ fn queue_pkt(&mut self, supp: &mut NADecoderSupport, pkt: &NAPacket, user_id: u32) -> DecoderResult<bool> {
+ if !self.can_take_input() {
+ return Ok(false);
+ }
+
+ 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))?;
+ }
+
+ let mut initial_ref_frames = Vec::new();
+ self.frame_refs.fill_ref_nums(&mut initial_ref_frames);
+
+ 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 mut cur_nal_buf = Vec::with_capacity(size);
+ let _size = unescape_nal(&src[offset..][..size], &mut cur_nal_buf);
+ self.handle_nal(cur_nal_buf, supp, skip_decoding, user_id, pkt.ts)?;
+ br.read_skip(size)?;
+ }
+ let mut fdec = None;
+ std::mem::swap(&mut fdec, &mut self.cur_fdec);
+ if let Some(fdc) = fdec {
+ let cpic = &fdc.cur_pic;
+ 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.clone());
+ }
+ let mut ref_frames = Vec::new();
+ self.frame_refs.fill_ref_nums(&mut ref_frames);
+ queue_decoding(&mut self.dispatch, fdc, &initial_ref_frames, &ref_frames);
+ }
+ } else {
+//todo NAL detection
+ unimplemented!();
+ }
+ Ok(true)
+ }
+ fn has_output(&mut self) -> bool {
+ if let Ok(ref ds) = self.dispatch.read() {
+ ds.has_output()
+ } else {
+ panic!("can't peek into status");
+ }
+ }
+ fn get_frame(&mut self) -> (DecoderResult<NAFrameRef>, u32) {
+ match wait_for_one(&mut self.dispatch) {
+ Ok(cpic) => {
+ let bufinfo = NABufferType::Video(cpic.buf.clone());
+ let ftype = cpic.pic_type;
+ let dts = Some(u64::from(cpic.full_id));
+ let mut frm = NAFrame::new(cpic.time, ftype, cpic.is_idr, self.info.clone(), bufinfo);
+ if let (Some(mydts), None) = (dts, frm.get_dts()) {
+ frm.set_dts(Some(mydts));
+ }
+ frm.set_id(cpic.user_id as i64);
+ (Ok(frm.into_ref()), cpic.user_id)
+ },
+ Err((err, id)) => (Err(err), id),
+ }
+ }
+ fn flush(&mut self) {
+ clear_threads(&mut self.dispatch);
+ }
+}
+
+impl NAOptionHandler for H264MTDecoder {
+ 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_mt() -> Box<dyn NADecoderMT + Send> {
+ Box::new(H264MTDecoder::new())
+}
projects / nihav.git / blobdiff