Inheritance diagram for gray_video_pattern_generator:

Collaboration diagram for gray_video_pattern_generator:

Public Member Functions
	gray_video_pattern_generator (int w, int h, codec_t c, string const &opts)

char *	get_next () override

Public Member Functions inherited from video_pattern_generator
virtual	~video_pattern_generator ()

Private Attributes
codec_t	color_spec

int	cur_idx = 0

vector< vector< unsigned char > >	data

long	data_len = vc_get_datalen(width, height, color_spec)

int	height

int	step = DEFAULT_STEP

int	width

Static Private Attributes
static constexpr int	DEFAULT_STEP = 1

Detailed Description

Definition at line 719 of file video_pattern_generator.cpp.

Constructor & Destructor Documentation

◆ gray_video_pattern_generator()

gray_video_pattern_generator::gray_video_pattern_generator	(	int	w,
		int	h,
		codec_t	c,
		string const &	opts )

inline

Definition at line 720 of file video_pattern_generator.cpp.

                : width(w), height(h), color_spec(c)
        {
                if (!opts.empty()) {
                        if (opts == "help") {
                                col() << "Usage:\n\t" SBOLD("gray[:step]") << " - interframe color increment (default " << DEFAULT_STEP << ")\n";
                                throw 1;
                        }
                        step = stoi(opts);
                }
                int col = 0;
                while (col < 0xFF) {
                        int pixels = get_pf_block_pixels(color_spec);
                        unsigned char rgba[MAX_PFB_SIZE * 4];
                        for (int i = 0; i < pixels * 4; ++i) {
                                rgba[i] = (i + 1) % 4 != 0 ? col : 0xFFU; // handle alpha
                        }
                        int dst_bs = get_pf_block_bytes(color_spec);
                        unsigned char dst[MAX_PFB_SIZE];
                        testcard_convert_buffer(RGBA, color_spec, dst, rgba, pixels, 1);
 
                        auto next_frame = vector<unsigned char>(data_len);
                        for (int y = 0; y < height; ++y) {
                                for (int x = 0; x < width / pixels; x += 1) {
                                        memcpy(next_frame.data() + y * vc_get_linesize(width, color_spec) + x * dst_bs, dst, dst_bs);
                                }
                        }
                        data.push_back(std::move(next_frame));
                        col += step;
                }
        }

References step.

Member Function Documentation

◆ get_next()

char * gray_video_pattern_generator::get_next ( )

inlineoverridevirtual

Implements video_pattern_generator.

Definition at line 751 of file video_pattern_generator.cpp.

                                  {
                auto *out = (char *) data[cur_idx++].data();
                if (cur_idx * step >= 0xFF) {
                        cur_idx = 0;
                }
 
                return out;
        }