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);
}
}
}
}
public static ScalingList read(BitReader inb, int sizeOfScalingList)
{
ScalingList sl = new ScalingList();
sl.scalingList = new int[sizeOfScalingList];
int lastScale = 8;
int nextScale = 8;
for (int j = 0; j < sizeOfScalingList; j++)
{
if (nextScale != 0)
{
int deltaScale = CAVLCReader.readSE(inb, "deltaScale");
nextScale = (lastScale + deltaScale + 256) % 256;
sl.useDefaultScalingMatrixFlag = (j == 0 && nextScale == 0);
}
sl.scalingList[j] = nextScale == 0 ? lastScale : nextScale;
lastScale = sl.scalingList[j];
}
return(sl);
}
public static PictureParameterSet read(MemoryStream iss)
{
BitReader inb = new BitReader(iss);
PictureParameterSet pps = new PictureParameterSet();
pps.pic_parameter_set_id = CAVLCReader.readUE(inb, "PPS: pic_parameter_set_id");
pps.seq_parameter_set_id = CAVLCReader.readUE(inb, "PPS: seq_parameter_set_id");
pps.entropy_coding_mode_flag = CAVLCReader.readBool(inb, "PPS: entropy_coding_mode_flag");
pps.pic_order_present_flag = CAVLCReader.readBool(inb, "PPS: pic_order_present_flag");
pps.num_slice_groups_minus1 = CAVLCReader.readUE(inb, "PPS: num_slice_groups_minus1");
if (pps.num_slice_groups_minus1 > 0)
{
pps.slice_group_map_type = CAVLCReader.readUE(inb, "PPS: slice_group_map_type");
pps.top_left = new int[pps.num_slice_groups_minus1 + 1];
pps.bottom_right = new int[pps.num_slice_groups_minus1 + 1];
pps.run_length_minus1 = new int[pps.num_slice_groups_minus1 + 1];
if (pps.slice_group_map_type == 0)
{
for (int iGroup = 0; iGroup <= pps.num_slice_groups_minus1; iGroup++)
{
pps.run_length_minus1[iGroup] = CAVLCReader.readUE(inb, "PPS: run_length_minus1");
}
}
else if (pps.slice_group_map_type == 2)
{
for (int iGroup = 0; iGroup < pps.num_slice_groups_minus1; iGroup++)
{
pps.top_left[iGroup] = CAVLCReader.readUE(inb, "PPS: top_left");
pps.bottom_right[iGroup] = CAVLCReader.readUE(inb, "PPS: bottom_right");
}
}
else if (pps.slice_group_map_type == 3 || pps.slice_group_map_type == 4 || pps.slice_group_map_type == 5)
{
pps.slice_group_change_direction_flag = CAVLCReader.readBool(inb, "PPS: slice_group_change_direction_flag");
pps.slice_group_change_rate_minus1 = CAVLCReader.readUE(inb, "PPS: slice_group_change_rate_minus1");
}
else if (pps.slice_group_map_type == 6)
{
int NumberBitsPerSliceGroupId;
if (pps.num_slice_groups_minus1 + 1 > 4)
{
NumberBitsPerSliceGroupId = 3;
}
else if (pps.num_slice_groups_minus1 + 1 > 2)
{
NumberBitsPerSliceGroupId = 2;
}
else
{
NumberBitsPerSliceGroupId = 1;
}
int pic_size_in_map_units_minus1 = CAVLCReader.readUE(inb, "PPS: pic_size_in_map_units_minus1");
pps.slice_group_id = new int[pic_size_in_map_units_minus1 + 1];
for (int i = 0; i <= pic_size_in_map_units_minus1; i++)
{
pps.slice_group_id[i] = CAVLCReader.readU(inb, NumberBitsPerSliceGroupId, "PPS: slice_group_id [" + i + "]f");
}
}
}
pps.num_ref_idx_active_minus1 = new int[] { CAVLCReader.readUE(inb, "PPS: num_ref_idx_l0_active_minus1"), CAVLCReader.readUE(inb, "PPS: num_ref_idx_l1_active_minus1") };
pps.weighted_pred_flag = CAVLCReader.readBool(inb, "PPS: weighted_pred_flag");
pps.weighted_bipred_idc = CAVLCReader.readNBit(inb, 2, "PPS: weighted_bipred_idc");
pps.pic_init_qp_minus26 = CAVLCReader.readSE(inb, "PPS: pic_init_qp_minus26");
pps.pic_init_qs_minus26 = CAVLCReader.readSE(inb, "PPS: pic_init_qs_minus26");
pps.chroma_qp_index_offset = CAVLCReader.readSE(inb, "PPS: chroma_qp_index_offset");
pps.deblocking_filter_control_present_flag = CAVLCReader.readBool(inb, "PPS: deblocking_filter_control_present_flag");
pps.constrained_intra_pred_flag = CAVLCReader.readBool(inb, "PPS: constrained_intra_pred_flag");
pps.redundant_pic_cnt_present_flag = CAVLCReader.readBool(inb, "PPS: redundant_pic_cnt_present_flag");
if (CAVLCReader.moreRBSPData(inb))
{
pps.extended = new PictureParameterSet.PPSExt();
pps.extended.transform_8x8_mode_flag = CAVLCReader.readBool(inb, "PPS: transform_8x8_mode_flag");
bool pic_scaling_matrix_present_flag = CAVLCReader.readBool(inb, "PPS: pic_scaling_matrix_present_flag");
if (pic_scaling_matrix_present_flag)
{
for (int i = 0; i < 6 + 2 * (pps.extended.transform_8x8_mode_flag ? 1 : 0); i++)
{
bool pic_scaling_list_present_flag = CAVLCReader.readBool(inb, "PPS: pic_scaling_list_present_flag");
if (pic_scaling_list_present_flag)
{
pps.extended.scalindMatrix.ScalingList4x4 = new ScalingList[8];
pps.extended.scalindMatrix.ScalingList8x8 = new ScalingList[8];
if (i < 6)
{
pps.extended.scalindMatrix.ScalingList4x4[i] = ScalingList.read(inb, 16);
}
else
{
pps.extended.scalindMatrix.ScalingList8x8[i - 6] = ScalingList.read(inb, 64);
}
}
}
}
pps.extended.second_chroma_qp_index_offset = CAVLCReader.readSE(inb, "PPS: second_chroma_qp_index_offset");
}
return(pps);
}
