AVCSequenceParameterSetReader::readData() public WP 1.0
{} Это метод класса: AVCSequenceParameterSetReader{}
Хуков нет.
Возвращает
Null. Ничего.
Использование
$AVCSequenceParameterSetReader = new AVCSequenceParameterSetReader(); $AVCSequenceParameterSetReader->readData();
Код AVCSequenceParameterSetReader::readData() AVCSequenceParameterSetReader::readData WP 5.6.2
public function readData() {
$this->skipBits(8);
$this->skipBits(8);
$profile = $this->getBits(8); // read profile
if ($profile > 0) {
$this->skipBits(8);
$level_idc = $this->getBits(8); // level_idc
$this->expGolombUe(); // seq_parameter_set_id // sps
$this->expGolombUe(); // log2_max_frame_num_minus4
$picOrderType = $this->expGolombUe(); // pic_order_cnt_type
if ($picOrderType == 0) {
$this->expGolombUe(); // log2_max_pic_order_cnt_lsb_minus4
} elseif ($picOrderType == 1) {
$this->skipBits(1); // delta_pic_order_always_zero_flag
$this->expGolombSe(); // offset_for_non_ref_pic
$this->expGolombSe(); // offset_for_top_to_bottom_field
$num_ref_frames_in_pic_order_cnt_cycle = $this->expGolombUe(); // num_ref_frames_in_pic_order_cnt_cycle
for ($i = 0; $i < $num_ref_frames_in_pic_order_cnt_cycle; $i++) {
$this->expGolombSe(); // offset_for_ref_frame[ i ]
}
}
$this->expGolombUe(); // num_ref_frames
$this->skipBits(1); // gaps_in_frame_num_value_allowed_flag
$pic_width_in_mbs_minus1 = $this->expGolombUe(); // pic_width_in_mbs_minus1
$pic_height_in_map_units_minus1 = $this->expGolombUe(); // pic_height_in_map_units_minus1
$frame_mbs_only_flag = $this->getBits(1); // frame_mbs_only_flag
if ($frame_mbs_only_flag == 0) {
$this->skipBits(1); // mb_adaptive_frame_field_flag
}
$this->skipBits(1); // direct_8x8_inference_flag
$frame_cropping_flag = $this->getBits(1); // frame_cropping_flag
$frame_crop_left_offset = 0;
$frame_crop_right_offset = 0;
$frame_crop_top_offset = 0;
$frame_crop_bottom_offset = 0;
if ($frame_cropping_flag) {
$frame_crop_left_offset = $this->expGolombUe(); // frame_crop_left_offset
$frame_crop_right_offset = $this->expGolombUe(); // frame_crop_right_offset
$frame_crop_top_offset = $this->expGolombUe(); // frame_crop_top_offset
$frame_crop_bottom_offset = $this->expGolombUe(); // frame_crop_bottom_offset
}
$this->skipBits(1); // vui_parameters_present_flag
// etc
$this->width = (($pic_width_in_mbs_minus1 + 1) * 16) - ($frame_crop_left_offset * 2) - ($frame_crop_right_offset * 2);
$this->height = ((2 - $frame_mbs_only_flag) * ($pic_height_in_map_units_minus1 + 1) * 16) - ($frame_crop_top_offset * 2) - ($frame_crop_bottom_offset * 2);
}
}