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);
}
