public override int probe(MemoryStream data) { bool avalidSps = false, avalidPps = false, avalidSh = false; foreach (var nalUnit in Utility.splitFrame(data.duplicate())) { NALUnit marker = NALUnit.read(nalUnit); if (marker.type == NALUnitType.IDR_SLICE || marker.type == NALUnitType.NON_IDR_SLICE) { BitReader reader = new BitReader(nalUnit); avalidSh = validSh(new SliceHeaderReader().readPart1(reader)); break; } else if (marker.type == NALUnitType.SPS) { avalidSps = validSps(SeqParameterSet.read(nalUnit)); } else if (marker.type == NALUnitType.PPS) { avalidPps = validPps(PictureParameterSet.read(nalUnit)); } } return((avalidSh ? 60 : 0) + (avalidSps ? 20 : 0) + (avalidPps ? 20 : 0)); }
private void writeOffsetWeight(SliceHeader sliceHeader, BitWriter writer, int list) { SeqParameterSet sps = sliceHeader.sps; int defaultLW = 1 << sliceHeader.pred_weight_table.luma_log2_weight_denom; int defaultCW = 1 << sliceHeader.pred_weight_table.chroma_log2_weight_denom; for (int i = 0; i < sliceHeader.pred_weight_table.luma_weight[list].Length; i++) { bool flagLuma = sliceHeader.pred_weight_table.luma_weight[list][i] != defaultLW || sliceHeader.pred_weight_table.luma_offset[list][i] != 0; CAVLCWriter.writeBool(writer, flagLuma, "SH: luma_weight_l0_flag"); if (flagLuma) { CAVLCWriter.writeSE(writer, sliceHeader.pred_weight_table.luma_weight[list][i], "SH: luma_weight_l" + list); CAVLCWriter.writeSE(writer, sliceHeader.pred_weight_table.luma_offset[list][i], "SH: luma_offset_l" + list); } if (sps.chroma_format_idc != ColorSpace.MONO) { bool flagChroma = sliceHeader.pred_weight_table.chroma_weight[list][0][i] != defaultCW || sliceHeader.pred_weight_table.chroma_offset[list][0][i] != 0 || sliceHeader.pred_weight_table.chroma_weight[list][1][i] != defaultCW || sliceHeader.pred_weight_table.chroma_offset[list][1][i] != 0; CAVLCWriter.writeBool(writer, flagChroma, "SH: chroma_weight_l0_flag"); if (flagChroma) { for (int j = 0; j < 2; j++) { CAVLCWriter.writeSE(writer, sliceHeader.pred_weight_table.chroma_weight[list][j][i], "SH: chroma_weight_l" + list); CAVLCWriter.writeSE(writer, sliceHeader.pred_weight_table.chroma_offset[list][j][i], "SH: chroma_offset_l" + list); } } } } }
public static SeqParameterSet readSPS(System.IO.MemoryStream data) { System.IO.MemoryStream input = data.duplicate(); Utility.unescapeNAL(input); SeqParameterSet sps = SeqParameterSet.read(input); return(sps); }
public static System.IO.MemoryStream writeSPS(SeqParameterSet sps, int approxSize) { System.IO.MemoryStream output = new System.IO.MemoryStream(approxSize + 8); sps.write(output); output.flip(); Utility.escapeNAL(output); return(output); }
public static SampleEntry createMOVSampleEntry(SeqParameterSet initSPS, PictureParameterSet initPPS) { System.IO.MemoryStream bb1 = new System.IO.MemoryStream(512), bb2 = new System.IO.MemoryStream(512); initSPS.write(bb1); initPPS.write(bb2); bb1.flip(); bb2.flip(); return(createMOVSampleEntry(new System.IO.MemoryStream[] { bb1 }.ToList(), new System.IO.MemoryStream[] { bb2 }.ToList())); }
public void addSps(List <MemoryStream> spsList) { foreach (var byteBuffer in spsList) { MemoryStream dup = byteBuffer.duplicate(); Utility.unescapeNAL(dup); SeqParameterSet s = SeqParameterSet.read(dup); sps.Add(s.seq_parameter_set_id, s); } }
public CAVLC(SeqParameterSet sps, PictureParameterSet pps, int mbW, int mbH) { this.color = sps.chroma_format_idc; this.chromaDCVLC = codeTableChromaDC(); this.mbWidth = sps.pic_width_in_mbs_minus1 + 1; this.mbMask = (1 << mbH) - 1; tokensLeft = new int[4]; tokensTop = new int[mbWidth << mbW]; }
public static Size getPicSize(SeqParameterSet sps) { int w = (sps.pic_width_in_mbs_minus1 + 1) << 4; int h = getPicHeightInMbs(sps) << 4; if (sps.frame_cropping_flag) { w -= (sps.frame_crop_left_offset + sps.frame_crop_right_offset) << sps.chroma_format_idc.compWidth[1]; h -= (sps.frame_crop_top_offset + sps.frame_crop_bottom_offset) << sps.chroma_format_idc.compHeight[1]; } return(new Size(w, h)); }
private void writePredWeightTable(SliceHeader sliceHeader, BitWriter writer) { SeqParameterSet sps = sliceHeader.sps; CAVLCWriter.writeUE(writer, sliceHeader.pred_weight_table.luma_log2_weight_denom, "SH: luma_log2_weight_denom"); if (sps.chroma_format_idc != ColorSpace.MONO) { CAVLCWriter.writeUE(writer, sliceHeader.pred_weight_table.chroma_log2_weight_denom, "SH: chroma_log2_weight_denom"); } writeOffsetWeight(sliceHeader, writer, 0); if (sliceHeader.slice_type == SliceType.B) { writeOffsetWeight(sliceHeader, writer, 1); } }
public static Frame createFrame(SeqParameterSet sps, int[][] buffer, int frame_num, int[][][][] mvs, Frame[][][] refsUsed, int POC) { int width = sps.pic_width_in_mbs_minus1 + 1 << 4; int height = Utility.getPicHeightInMbs(sps) << 4; Rect crop = null; if (sps.frame_cropping_flag) { int sX = sps.frame_crop_left_offset << 1; int sY = sps.frame_crop_top_offset << 1; int w = width - (sps.frame_crop_right_offset << 1) - sX; int h = height - (sps.frame_crop_bottom_offset << 1) - sY; crop = new Rect(sX, sY, w, h); } return(new Frame(width, height, buffer, ColorSpace.YUV420, crop, frame_num, mvs, refsUsed, POC)); }
public Frame decodeFrame(List <MemoryStream> nalUnits, int[][] buffer) { Frame result = null; foreach (var nalUnit in nalUnits) { NALUnit marker = NALUnit.read(nalUnit); Utility.unescapeNAL(nalUnit); switch (marker.type.getValue()) { case 1: case 5: if (result == null) { result = init(buffer, nalUnit, marker); } decoder.decode(nalUnit, marker); break; case 8: SeqParameterSet _sps = SeqParameterSet.read(nalUnit); vdecoder.sps.Add(_sps.seq_parameter_set_id, _sps); break; case 7: PictureParameterSet _pps = PictureParameterSet.read(nalUnit); vdecoder.pps.Add(_pps.pic_parameter_set_id, _pps); break; default: break; } } filter.deblockFrame(result); updateReferences(result); return(result); }
private Frame init(int[][] buffer, MemoryStream segment, NALUnit marker) { firstNu = marker; shr = new SliceHeaderReader(); BitReader br = new BitReader(segment.duplicate()); firstSliceHeader = shr.readPart1(br); activePps = vdecoder.pps[firstSliceHeader.pic_parameter_set_id]; activeSps = vdecoder.sps[activePps.seq_parameter_set_id]; shr.readPart2(firstSliceHeader, marker, activeSps, activePps, br); int picWidthInMbs = activeSps.pic_width_in_mbs_minus1 + 1; int picHeightInMbs = Utility.getPicHeightInMbs(activeSps); int[][] nCoeff = (int[][])Array.CreateInstance(typeof(int), new int[] { picHeightInMbs << 2, picWidthInMbs << 2 }); //new int[picHeightInMbs << 2][picWidthInMbs << 2]; mvs = (int[][][][])Array.CreateInstance(typeof(int), new int[] { 2, picHeightInMbs << 2, picWidthInMbs << 2, 3 }); //new int[2][picHeightInMbs << 2][picWidthInMbs << 2][3]; MBType[] mbTypes = new MBType[picHeightInMbs * picWidthInMbs]; bool[] tr8x8Used = new bool[picHeightInMbs * picWidthInMbs]; int[][] mbQps = (int[][])Array.CreateInstance(typeof(int), new int[] { 3, picHeightInMbs * picWidthInMbs });//new int[3][picHeightInMbs * picWidthInMbs]; SliceHeader[] shs = new SliceHeader[picHeightInMbs * picWidthInMbs]; Frame[][][] refsUsed = new Frame[picHeightInMbs * picWidthInMbs][][]; if (vdecoder.sRefs == null) { vdecoder.sRefs = new Frame[1 << (firstSliceHeader.sps.log2_max_frame_num_minus4 + 4)]; vdecoder.lRefs = new Dictionary <int, Frame>(); } Frame result = createFrame(activeSps, buffer, firstSliceHeader.frame_num, mvs, refsUsed, vdecoder.poc.calcPOC(firstSliceHeader, firstNu)); decoder = new SliceDecoder(activeSps, activePps, nCoeff, mvs, mbTypes, mbQps, shs, tr8x8Used, refsUsed, result, vdecoder.sRefs, vdecoder.lRefs); decoder.setDebug(vdecoder.debug); filter = new DeblockingFilter(picWidthInMbs, activeSps.bit_depth_chroma_minus8 + 8, nCoeff, mvs, mbTypes, mbQps, shs, tr8x8Used, refsUsed); return(result); }
private static void readScalingListMatrix(BitReader inb, SeqParameterSet sps) { sps.scalingMatrix = new ScalingMatrix(); for (int i = 0; i < 8; i++) { bool seqScalingListPresentFlag = CAVLCReader.readBool(inb, "SPS: seqScalingListPresentFlag"); if (seqScalingListPresentFlag) { sps.scalingMatrix.ScalingList4x4 = new ScalingList[8]; sps.scalingMatrix.ScalingList8x8 = new ScalingList[8]; if (i < 6) { sps.scalingMatrix.ScalingList4x4[i] = ScalingList.read(inb, 16); } else { sps.scalingMatrix.ScalingList8x8[i - 6] = ScalingList.read(inb, 64); } } } }
private static void readPredWeightTable(SeqParameterSet sps, PictureParameterSet pps, SliceHeader sh, BitReader inb) { sh.pred_weight_table = new PredictionWeightTable(); int[] numRefsminus1 = sh.num_ref_idx_active_override_flag ? sh.num_ref_idx_active_minus1 : pps.num_ref_idx_active_minus1; int[] nr = new int[] { numRefsminus1[0] + 1, numRefsminus1[1] + 1 }; sh.pred_weight_table.luma_log2_weight_denom = CAVLCReader.readUE(inb, "SH: luma_log2_weight_denom"); if (sps.chroma_format_idc != ColorSpace.MONO) { sh.pred_weight_table.chroma_log2_weight_denom = CAVLCReader.readUE(inb, "SH: chroma_log2_weight_denom"); } int defaultLW = 1 << sh.pred_weight_table.luma_log2_weight_denom; int defaultCW = 1 << sh.pred_weight_table.chroma_log2_weight_denom; for (int list = 0; list < 2; list++) { sh.pred_weight_table.luma_weight[list] = new int[nr[list]]; sh.pred_weight_table.luma_offset[list] = new int[nr[list]]; sh.pred_weight_table.chroma_weight[list] = (int[][])System.Array.CreateInstance(typeof(int), new int[] { 2, nr[list] }); sh.pred_weight_table.chroma_offset[list] = (int[][])System.Array.CreateInstance(typeof(int), new int[] { 2, nr[list] }); for (int i = 0; i < nr[list]; i++) { sh.pred_weight_table.luma_weight[list][i] = defaultLW; sh.pred_weight_table.luma_offset[list][i] = 0; sh.pred_weight_table.chroma_weight[list][0][i] = defaultCW; sh.pred_weight_table.chroma_offset[list][0][i] = 0; sh.pred_weight_table.chroma_weight[list][1][i] = defaultCW; sh.pred_weight_table.chroma_offset[list][1][i] = 0; } } readWeightOffset(sps, pps, sh, inb, nr, 0); if (sh.slice_type == SliceType.B) { readWeightOffset(sps, pps, sh, inb, nr, 1); } }
public static SampleEntry createMOVSampleEntry(List <System.IO.MemoryStream> spsList, List <System.IO.MemoryStream> ppsList) { SeqParameterSet sps = readSPS(StreamExtensions.duplicate(spsList[0])); AvcCBox avcC = new AvcCBox(sps.profile_idc, 0, sps.level_idc, spsList, ppsList); int codedWidth = (sps.pic_width_in_mbs_minus1 + 1) << 4; int codedHeight = getPicHeightInMbs(sps) << 4; int width = sps.frame_cropping_flag ? codedWidth - ((sps.frame_crop_right_offset + sps.frame_crop_left_offset) << sps.chroma_format_idc.compWidth[1]) : codedWidth; int height = sps.frame_cropping_flag ? codedHeight - ((sps.frame_crop_bottom_offset + sps.frame_crop_top_offset) << sps.chroma_format_idc.compHeight[1]) : codedHeight; Size size = new Size(width, height); SampleEntry se = videoSampleEntry("avc1", size, "JCodec"); se.Add(avcC); return(se); }
private static void readWeightOffset(SeqParameterSet sps, PictureParameterSet pps, SliceHeader sh, BitReader inb, int[] numRefs, int list) { for (int i = 0; i < numRefs[list]; i++) { bool luma_weight_l0_flag = CAVLCReader.readBool(inb, "SH: luma_weight_l0_flag"); if (luma_weight_l0_flag) { sh.pred_weight_table.luma_weight[list][i] = CAVLCReader.readSE(inb, "SH: weight"); sh.pred_weight_table.luma_offset[list][i] = CAVLCReader.readSE(inb, "SH: offset"); } if (sps.chroma_format_idc != ColorSpace.MONO) { bool chroma_weight_l0_flag = CAVLCReader.readBool(inb, "SH: chroma_weight_l0_flag"); if (chroma_weight_l0_flag) { sh.pred_weight_table.chroma_weight[list][0][i] = CAVLCReader.readSE(inb, "SH: weight"); sh.pred_weight_table.chroma_offset[list][0][i] = CAVLCReader.readSE(inb, "SH: offset"); sh.pred_weight_table.chroma_weight[list][1][i] = CAVLCReader.readSE(inb, "SH: weight"); sh.pred_weight_table.chroma_offset[list][1][i] = CAVLCReader.readSE(inb, "SH: offset"); } } } }
public void write(SliceHeader sliceHeader, bool idrSlice, int nalRefIdc, BitWriter writer) { SeqParameterSet sps = sliceHeader.sps; PictureParameterSet pps = sliceHeader.pps; CAVLCWriter.writeUE(writer, sliceHeader.first_mb_in_slice, "SH: first_mb_in_slice"); CAVLCWriter.writeUE(writer, (int)sliceHeader.slice_type + (sliceHeader.slice_type_restr ? 5 : 0), "SH: slice_type"); CAVLCWriter.writeUE(writer, sliceHeader.pic_parameter_set_id, "SH: pic_parameter_set_id"); CAVLCWriter.writeU(writer, sliceHeader.frame_num, sps.log2_max_frame_num_minus4 + 4, "SH: frame_num"); if (!sps.frame_mbs_only_flag) { CAVLCWriter.writeBool(writer, sliceHeader.field_pic_flag, "SH: field_pic_flag"); if (sliceHeader.field_pic_flag) { CAVLCWriter.writeBool(writer, sliceHeader.bottom_field_flag, "SH: bottom_field_flag"); } } if (idrSlice) { CAVLCWriter.writeUE(writer, sliceHeader.idr_pic_id, "SH: idr_pic_id"); } if (sps.pic_order_cnt_type == 0) { CAVLCWriter.writeU(writer, sliceHeader.pic_order_cnt_lsb, sps.log2_max_pic_order_cnt_lsb_minus4 + 4); if (pps.pic_order_present_flag && !sps.field_pic_flag) { CAVLCWriter.writeSE(writer, sliceHeader.delta_pic_order_cnt_bottom, "SH: delta_pic_order_cnt_bottom"); } } if (sps.pic_order_cnt_type == 1 && !sps.delta_pic_order_always_zero_flag) { CAVLCWriter.writeSE(writer, sliceHeader.delta_pic_order_cnt[0], "SH: delta_pic_order_cnt"); if (pps.pic_order_present_flag && !sps.field_pic_flag) { CAVLCWriter.writeSE(writer, sliceHeader.delta_pic_order_cnt[1], "SH: delta_pic_order_cnt"); } } if (pps.redundant_pic_cnt_present_flag) { CAVLCWriter.writeUE(writer, sliceHeader.redundant_pic_cnt, "SH: redundant_pic_cnt"); } if (sliceHeader.slice_type == SliceType.B) { CAVLCWriter.writeBool(writer, sliceHeader.direct_spatial_mv_pred_flag, "SH: direct_spatial_mv_pred_flag"); } if (sliceHeader.slice_type == SliceType.P || sliceHeader.slice_type == SliceType.SP || sliceHeader.slice_type == SliceType.B) { CAVLCWriter.writeBool(writer, sliceHeader.num_ref_idx_active_override_flag, "SH: num_ref_idx_active_override_flag"); if (sliceHeader.num_ref_idx_active_override_flag) { CAVLCWriter.writeUE(writer, sliceHeader.num_ref_idx_active_minus1[0], "SH: num_ref_idx_l0_active_minus1"); if (sliceHeader.slice_type == SliceType.B) { CAVLCWriter.writeUE(writer, sliceHeader.num_ref_idx_active_minus1[1], "SH: num_ref_idx_l1_active_minus1"); } } } writeRefPicListReordering(sliceHeader, writer); if ((pps.weighted_pred_flag && (sliceHeader.slice_type == SliceType.P || sliceHeader.slice_type == SliceType.SP)) || (pps.weighted_bipred_idc == 1 && sliceHeader.slice_type == SliceType.B)) { writePredWeightTable(sliceHeader, writer); } if (nalRefIdc != 0) { writeDecRefPicMarking(sliceHeader, idrSlice, writer); } if (pps.entropy_coding_mode_flag && sliceHeader.slice_type.isInter()) { CAVLCWriter.writeUE(writer, sliceHeader.cabac_init_idc, "SH: cabac_init_idc"); } CAVLCWriter.writeSE(writer, sliceHeader.slice_qp_delta, "SH: slice_qp_delta"); if (sliceHeader.slice_type == SliceType.SP || sliceHeader.slice_type == SliceType.SI) { if (sliceHeader.slice_type == SliceType.SP) { CAVLCWriter.writeBool(writer, sliceHeader.sp_for_switch_flag, "SH: sp_for_switch_flag"); } CAVLCWriter.writeSE(writer, sliceHeader.slice_qs_delta, "SH: slice_qs_delta"); } if (pps.deblocking_filter_control_present_flag) { CAVLCWriter.writeUE(writer, sliceHeader.disable_deblocking_filter_idc, "SH: disable_deblocking_filter_idc"); if (sliceHeader.disable_deblocking_filter_idc != 1) { CAVLCWriter.writeSE(writer, sliceHeader.slice_alpha_c0_offset_div2, "SH: slice_alpha_c0_offset_div2"); CAVLCWriter.writeSE(writer, sliceHeader.slice_beta_offset_div2, "SH: slice_beta_offset_div2"); } } if (pps.num_slice_groups_minus1 > 0 && pps.slice_group_map_type >= 3 && pps.slice_group_map_type <= 5) { int len = (sps.pic_height_in_map_units_minus1 + 1) * (sps.pic_width_in_mbs_minus1 + 1) / (pps.slice_group_change_rate_minus1 + 1); if (((sps.pic_height_in_map_units_minus1 + 1) * (sps.pic_width_in_mbs_minus1 + 1)) % (pps.slice_group_change_rate_minus1 + 1) > 0) { len += 1; } len = CeilLog2(len + 1); CAVLCWriter.writeU(writer, sliceHeader.slice_group_change_cycle, len); } }
private bool validSps(SeqParameterSet sps) { return(sps.bit_depth_chroma_minus8 < 4 && sps.bit_depth_luma_minus8 < 4 && sps.chroma_format_idc != null && sps.seq_parameter_set_id < 2 && sps.pic_order_cnt_type <= 2); }
public SliceHeader readPart2(SliceHeader sh, NALUnit nalUnit, SeqParameterSet sps, PictureParameterSet pps, BitReader inb) { sh.pps = pps; sh.sps = sps; sh.frame_num = CAVLCReader.readU(inb, sps.log2_max_frame_num_minus4 + 4, "SH: frame_num"); if (!sps.frame_mbs_only_flag) { sh.field_pic_flag = CAVLCReader.readBool(inb, "SH: field_pic_flag"); if (sh.field_pic_flag) { sh.bottom_field_flag = CAVLCReader.readBool(inb, "SH: bottom_field_flag"); } } if (nalUnit.type == NALUnitType.IDR_SLICE) { sh.idr_pic_id = CAVLCReader.readUE(inb, "SH: idr_pic_id"); } if (sps.pic_order_cnt_type == 0) { sh.pic_order_cnt_lsb = CAVLCReader.readU(inb, sps.log2_max_pic_order_cnt_lsb_minus4 + 4, "SH: pic_order_cnt_lsb"); if (pps.pic_order_present_flag && !sps.field_pic_flag) { sh.delta_pic_order_cnt_bottom = CAVLCReader.readSE(inb, "SH: delta_pic_order_cnt_bottom"); } } sh.delta_pic_order_cnt = new int[2]; if (sps.pic_order_cnt_type == 1 && !sps.delta_pic_order_always_zero_flag) { sh.delta_pic_order_cnt[0] = CAVLCReader.readSE(inb, "SH: delta_pic_order_cnt[0]"); if (pps.pic_order_present_flag && !sps.field_pic_flag) { sh.delta_pic_order_cnt[1] = CAVLCReader.readSE(inb, "SH: delta_pic_order_cnt[1]"); } } if (pps.redundant_pic_cnt_present_flag) { sh.redundant_pic_cnt = CAVLCReader.readUE(inb, "SH: redundant_pic_cnt"); } if (sh.slice_type == SliceType.B) { sh.direct_spatial_mv_pred_flag = CAVLCReader.readBool(inb, "SH: direct_spatial_mv_pred_flag"); } if (sh.slice_type == SliceType.P || sh.slice_type == SliceType.SP || sh.slice_type == SliceType.B) { sh.num_ref_idx_active_override_flag = CAVLCReader.readBool(inb, "SH: num_ref_idx_active_override_flag"); if (sh.num_ref_idx_active_override_flag) { sh.num_ref_idx_active_minus1[0] = CAVLCReader.readUE(inb, "SH: num_ref_idx_l0_active_minus1"); if (sh.slice_type == SliceType.B) { sh.num_ref_idx_active_minus1[1] = CAVLCReader.readUE(inb, "SH: num_ref_idx_l1_active_minus1"); } } } readRefPicListReorderinbg(sh, inb); if ((pps.weighted_pred_flag && (sh.slice_type == SliceType.P || sh.slice_type == SliceType.SP)) || (pps.weighted_bipred_idc == 1 && sh.slice_type == SliceType.B)) { readPredWeightTable(sps, pps, sh, inb); } if (nalUnit.nal_ref_idc != 0) { readDecoderPicMarkinbg(nalUnit, sh, inb); } if (pps.entropy_coding_mode_flag && sh.slice_type.isInter()) { sh.cabac_init_idc = CAVLCReader.readUE(inb, "SH: cabac_inbit_idc"); } sh.slice_qp_delta = CAVLCReader.readSE(inb, "SH: slice_qp_delta"); if (sh.slice_type == SliceType.SP || sh.slice_type == SliceType.SI) { if (sh.slice_type == SliceType.SP) { sh.sp_for_switch_flag = CAVLCReader.readBool(inb, "SH: sp_for_switch_flag"); } sh.slice_qs_delta = CAVLCReader.readSE(inb, "SH: slice_qs_delta"); } if (pps.deblocking_filter_control_present_flag) { sh.disable_deblocking_filter_idc = CAVLCReader.readUE(inb, "SH: disable_deblockinbg_filter_idc"); if (sh.disable_deblocking_filter_idc != 1) { sh.slice_alpha_c0_offset_div2 = CAVLCReader.readSE(inb, "SH: slice_alpha_c0_offset_div2"); sh.slice_beta_offset_div2 = CAVLCReader.readSE(inb, "SH: slice_beta_offset_div2"); } } if (pps.num_slice_groups_minus1 > 0 && pps.slice_group_map_type >= 3 && pps.slice_group_map_type <= 5) { int len = Utility.getPicHeightInMbs(sps) * (sps.pic_width_in_mbs_minus1 + 1) / (pps.slice_group_change_rate_minus1 + 1); if ((Utility.getPicHeightInMbs(sps) * (sps.pic_width_in_mbs_minus1 + 1)) % (pps.slice_group_change_rate_minus1 + 1) > 0) { len += 1; } len = CeilLog2(len + 1); sh.slice_group_change_cycle = CAVLCReader.readU(inb, len, "SH: slice_group_change_cycle"); } return(sh); }
public static int getPicHeightInMbs(SeqParameterSet sps) { int picHeightInMbs = (sps.pic_height_in_map_units_minus1 + 1) << (sps.frame_mbs_only_flag ? 0 : 1); return(picHeightInMbs); }
public SliceHeader run(System.IO.MemoryStream iss, System.IO.MemoryStream os, NALUnit nu, SeqParameterSet sps, PictureParameterSet pps) { System.IO.MemoryStream nal = os.duplicate(); Utility.unescapeNAL(iss); BitReader reader = new BitReader(iss); SliceHeader sh = shr.readPart1(reader); return(part2(iss, os, nu, sps, pps, nal, reader, sh)); }
public static SeqParameterSet read(MemoryStream isb) { BitReader inb = new BitReader(isb); SeqParameterSet sps = new SeqParameterSet(); sps.profile_idc = CAVLCReader.readNBit(inb, 8, "SPS: profile_idc"); sps.constraint_set_0_flag = CAVLCReader.readBool(inb, "SPS: constraint_set_0_flag"); sps.constraint_set_1_flag = CAVLCReader.readBool(inb, "SPS: constraint_set_1_flag"); sps.constraint_set_2_flag = CAVLCReader.readBool(inb, "SPS: constraint_set_2_flag"); sps.constraint_set_3_flag = CAVLCReader.readBool(inb, "SPS: constraint_set_3_flag"); CAVLCReader.readNBit(inb, 4, "SPS: reserved_zero_4bits"); sps.level_idc = (int)CAVLCReader.readNBit(inb, 8, "SPS: level_idc"); sps.seq_parameter_set_id = CAVLCReader.readUE(inb, "SPS: seq_parameter_set_id"); if (sps.profile_idc == 100 || sps.profile_idc == 110 || sps.profile_idc == 122 || sps.profile_idc == 144) { sps.chroma_format_idc = getColor(CAVLCReader.readUE(inb, "SPS: chroma_format_idc")); if (sps.chroma_format_idc == ColorSpace.YUV444) { sps.residual_color_transform_flag = CAVLCReader.readBool(inb, "SPS: residual_color_transform_flag"); } sps.bit_depth_luma_minus8 = CAVLCReader.readUE(inb, "SPS: bit_depth_luma_minus8"); sps.bit_depth_chroma_minus8 = CAVLCReader.readUE(inb, "SPS: bit_depth_chroma_minus8"); sps.qpprime_y_zero_transform_bypass_flag = CAVLCReader.readBool(inb, "SPS: qpprime_y_zero_transform_bypass_flag"); bool seqScalingMatrixPresent = CAVLCReader.readBool(inb, "SPS: seq_scaling_matrix_present_lag"); if (seqScalingMatrixPresent) { readScalingListMatrix(inb, sps); } } else { sps.chroma_format_idc = ColorSpace.YUV420; } sps.log2_max_frame_num_minus4 = CAVLCReader.readUE(inb, "SPS: log2_max_frame_num_minus4"); sps.pic_order_cnt_type = CAVLCReader.readUE(inb, "SPS: pic_order_cnt_type"); if (sps.pic_order_cnt_type == 0) { sps.log2_max_pic_order_cnt_lsb_minus4 = CAVLCReader.readUE(inb, "SPS: log2_max_pic_order_cnt_lsb_minus4"); } else if (sps.pic_order_cnt_type == 1) { sps.delta_pic_order_always_zero_flag = CAVLCReader.readBool(inb, "SPS: delta_pic_order_always_zero_flag"); sps.offset_for_non_ref_pic = CAVLCReader.readSE(inb, "SPS: offset_for_non_ref_pic"); sps.offset_for_top_to_bottom_field = CAVLCReader.readSE(inb, "SPS: offset_for_top_to_bottom_field"); sps.num_ref_frames_in_pic_order_cnt_cycle = CAVLCReader.readUE(inb, "SPS: num_ref_frames_in_pic_order_cnt_cycle"); sps.offsetForRefFrame = new int[sps.num_ref_frames_in_pic_order_cnt_cycle]; for (int i = 0; i < sps.num_ref_frames_in_pic_order_cnt_cycle; i++) { sps.offsetForRefFrame[i] = CAVLCReader.readSE(inb, "SPS: offsetForRefFrame [" + i + "]"); } } sps.num_ref_frames = CAVLCReader.readUE(inb, "SPS: num_ref_frames"); sps.gaps_in_frame_num_value_allowed_flag = CAVLCReader.readBool(inb, "SPS: gaps_in_frame_num_value_allowed_flag"); sps.pic_width_in_mbs_minus1 = CAVLCReader.readUE(inb, "SPS: pic_width_in_mbs_minus1"); sps.pic_height_in_map_units_minus1 = CAVLCReader.readUE(inb, "SPS: pic_height_in_map_units_minus1"); sps.frame_mbs_only_flag = CAVLCReader.readBool(inb, "SPS: frame_mbs_only_flag"); if (!sps.frame_mbs_only_flag) { sps.mb_adaptive_frame_field_flag = CAVLCReader.readBool(inb, "SPS: mb_adaptive_frame_field_flag"); } sps.direct_8x8_inference_flag = CAVLCReader.readBool(inb, "SPS: direct_8x8_inference_flag"); sps.frame_cropping_flag = CAVLCReader.readBool(inb, "SPS: frame_cropping_flag"); if (sps.frame_cropping_flag) { sps.frame_crop_left_offset = CAVLCReader.readUE(inb, "SPS: frame_crop_left_offset"); sps.frame_crop_right_offset = CAVLCReader.readUE(inb, "SPS: frame_crop_right_offset"); sps.frame_crop_top_offset = CAVLCReader.readUE(inb, "SPS: frame_crop_top_offset"); sps.frame_crop_bottom_offset = CAVLCReader.readUE(inb, "SPS: frame_crop_bottom_offset"); } bool vui_parameters_present_flag = CAVLCReader.readBool(inb, "SPS: vui_parameters_present_flag"); if (vui_parameters_present_flag) { sps.vuiParams = readVUIParameters(inb); } return(sps); }
private SliceHeader part2(System.IO.MemoryStream iss, System.IO.MemoryStream os, NALUnit nu, SeqParameterSet sps, PictureParameterSet pps, System.IO.MemoryStream nal, BitReader reader, SliceHeader sh) { BitWriter writer = new BitWriter(os); shr.readPart2(sh, nu, sps, pps, reader); tweak(sh); shw.write(sh, nu.type == NALUnitType.IDR_SLICE, nu.nal_ref_idc, writer); if (pps.entropy_coding_mode_flag) { copyDataCABAC(iss, os, reader, writer); } else { copyDataCAVLC(iss, os, reader, writer); } nal.limit(os.Position); Utility.escapeNAL(nal); os.position(nal.limit()); return(sh); }