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 5.5.1}

<?php
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);
	}
}