libavcodec/png.c File Reference

#include "avcodec.h"
#include "png.h"

Go to the source code of this file.

Functions
void *	ff_png_zalloc (void *opaque, unsigned int items, unsigned int size)
void	ff_png_zfree (void *opaque, void *ptr)
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

int ff_png_get_nb_channels

(

int

color_type

)

Definition at line 51 of file png.c.

Referenced by decode_frame(), and encode_frame().

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

Definition at line 64 of file png.c.

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

void* ff_png_zalloc	(	void *	opaque,
		unsigned int	items,
		unsigned int	size
	)

Definition at line 39 of file png.c.

Referenced by decode_frame(), and encode_frame().

void ff_png_zfree	(	void *	opaque,
		void *	ptr
	)

Definition at line 46 of file png.c.

Referenced by decode_frame(), and encode_frame().

---

Variable Documentation

const uint8_t ff_png_pass_xmin[NB_PASSES] [static]

Initial value:

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

Definition at line 30 of file png.c.

Referenced by ff_png_pass_row_size().

const uint8_t ff_png_pass_xshift[NB_PASSES] [static]

Initial value:

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

Definition at line 35 of file png.c.

Referenced by ff_png_pass_row_size().

const uint8_t ff_png_pass_ymask[NB_PASSES]

Initial value:

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

Definition at line 25 of file png.c.

Referenced by encode_frame(), and png_handle_row().