png.c File Reference

#include <stdint.h>
#include "libavutil/mem.h"
#include "png.h"

Go to the source code of this file.

Functions
int	ff_png_get_nb_channels (int color_type)
int	ff_png_pass_row_size (int pass, int bits_per_pixel, int width)

Variables
const uint8_t	ff_png_pass_ymask [NB_PASSES]
static const uint8_t	ff_png_pass_xmin [NB_PASSES]
static const uint8_t	ff_png_pass_xshift [NB_PASSES]

Function Documentation

ff_png_get_nb_channels()

int ff_png_get_nb_channels

(

int

color_type

)

Definition at line 41 of file png.c.

Referenced by decode_idat_chunk(), decode_sbit_chunk(), encode_headers(), and png_enc_init().

ff_png_pass_row_size()

int ff_png_pass_row_size	(	int	pass,
		int	bits_per_pixel,
		int	width
	)

Definition at line 54 of file png.c.

Referenced by decode_idat_chunk(), encode_frame(), and png_handle_row().

Variable Documentation

ff_png_pass_ymask

const uint8_t ff_png_pass_ymask[NB_PASSES]

Initial value:

= {
    0x80, 0x80, 0x08, 0x88, 0x22, 0xaa, 0x55,
}

Definition at line 27 of file png.c.

Referenced by encode_frame(), and png_handle_row().

ff_png_pass_xmin

const uint8_t ff_png_pass_xmin[NB_PASSES]

static

Initial value:

= {
    0, 4, 0, 2, 0, 1, 0
}

Definition at line 32 of file png.c.

Referenced by ff_png_pass_row_size().

ff_png_pass_xshift

const uint8_t ff_png_pass_xshift[NB_PASSES]

static

Initial value:

= {
    3, 3, 2, 2, 1, 1, 0
}

Definition at line 37 of file png.c.

Referenced by ff_png_pass_row_size().