libavcodec/png.h File Reference

#include <stdint.h>
#include <zlib.h>
#include "avcodec.h"
#include "bytestream.h"

Go to the source code of this file.

Data Structures
struct	PNGDecContext
Defines
#define	PNG_COLOR_MASK_PALETTE   1
#define	PNG_COLOR_MASK_COLOR   2
#define	PNG_COLOR_MASK_ALPHA   4
#define	PNG_COLOR_TYPE_GRAY   0
#define	PNG_COLOR_TYPE_PALETTE   (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
#define	PNG_COLOR_TYPE_RGB   (PNG_COLOR_MASK_COLOR)
#define	PNG_COLOR_TYPE_RGB_ALPHA   (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)
#define	PNG_COLOR_TYPE_GRAY_ALPHA   (PNG_COLOR_MASK_ALPHA)
#define	PNG_FILTER_TYPE_LOCO   64
#define	PNG_FILTER_VALUE_NONE   0
#define	PNG_FILTER_VALUE_SUB   1
#define	PNG_FILTER_VALUE_UP   2
#define	PNG_FILTER_VALUE_AVG   3
#define	PNG_FILTER_VALUE_PAETH   4
#define	PNG_FILTER_VALUE_MIXED   5
#define	PNG_IHDR   0x0001
#define	PNG_IDAT   0x0002
#define	PNG_ALLIMAGE   0x0004
#define	PNG_PLTE   0x0008
#define	NB_PASSES   7
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)
void	ff_add_png_paeth_prediction (uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp)
void	ff_png_init_mmx (PNGDecContext *s)
Variables
const uint8_t	ff_pngsig [8]
const uint8_t	ff_mngsig [8]
const uint8_t	ff_png_pass_ymask [NB_PASSES]
const uint8_t	ff_png_pass_mask [NB_PASSES]

---

Define Documentation

#define NB_PASSES   7

Definition at line 54 of file png.h.

Referenced by encode_frame(), and png_handle_row().

#define PNG_ALLIMAGE   0x0004

Definition at line 51 of file png.h.

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

#define PNG_COLOR_MASK_ALPHA   4

Definition at line 33 of file png.h.

Referenced by ff_png_get_nb_channels().

#define PNG_COLOR_MASK_COLOR   2

Definition at line 32 of file png.h.

Referenced by ff_png_get_nb_channels().

#define PNG_COLOR_MASK_PALETTE   1

Definition at line 31 of file png.h.

Referenced by ff_png_get_nb_channels().

#define PNG_COLOR_TYPE_GRAY   0

Definition at line 35 of file png.h.

Referenced by decode_frame(), and encode_frame().

#define PNG_COLOR_TYPE_GRAY_ALPHA   (PNG_COLOR_MASK_ALPHA)

Definition at line 39 of file png.h.

Referenced by decode_frame(), and encode_frame().

#define PNG_COLOR_TYPE_PALETTE   (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)

Definition at line 36 of file png.h.

Referenced by decode_frame(), and encode_frame().

#define PNG_COLOR_TYPE_RGB   (PNG_COLOR_MASK_COLOR)

Definition at line 37 of file png.h.

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

#define PNG_COLOR_TYPE_RGB_ALPHA   (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)

Definition at line 38 of file png.h.

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

#define PNG_FILTER_TYPE_LOCO   64

Definition at line 41 of file png.h.

Referenced by png_handle_row().

#define PNG_FILTER_VALUE_AVG   3

Definition at line 45 of file png.h.

Referenced by png_filter_row().

#define PNG_FILTER_VALUE_MIXED   5

Definition at line 47 of file png.h.

Referenced by encode_frame(), png_choose_filter(), and png_enc_init().

#define PNG_FILTER_VALUE_NONE   0

Definition at line 42 of file png.h.

Referenced by png_enc_init(), and png_filter_row().

#define PNG_FILTER_VALUE_PAETH   4

Definition at line 46 of file png.h.

Referenced by png_filter_row().

#define PNG_FILTER_VALUE_SUB   1

Definition at line 43 of file png.h.

Referenced by png_choose_filter(), and png_filter_row().

#define PNG_FILTER_VALUE_UP   2

Definition at line 44 of file png.h.

Referenced by png_filter_row().

#define PNG_IDAT   0x0002

Definition at line 50 of file png.h.

Referenced by decode_frame().

#define PNG_IHDR   0x0001

Definition at line 49 of file png.h.

Referenced by decode_frame().

#define PNG_PLTE   0x0008

Definition at line 52 of file png.h.

Referenced by decode_frame().

---

Function Documentation

void ff_add_png_paeth_prediction	(	uint8_t *	dst,
		uint8_t *	src,
		uint8_t *	top,
		int	w,
		int	bpp
	)

int ff_png_get_nb_channels

(

int

color_type

)

Definition at line 59 of file png.c.

Referenced by decode_frame(), and encode_frame().

void ff_png_init_mmx

(

PNGDecContext *

s

)

Definition at line 131 of file png_mmx.c.

Referenced by png_dec_init().

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

Definition at line 72 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 47 of file png.c.

Referenced by decode_frame(), and encode_frame().

void ff_png_zfree	(	void *	opaque,
		void *	ptr
	)

Definition at line 54 of file png.c.

Referenced by decode_frame(), and encode_frame().

---

Variable Documentation

const uint8_t ff_mngsig[8]

Definition at line 25 of file png.c.

Referenced by decode_frame().

const uint8_t ff_png_pass_mask[NB_PASSES]

Definition at line 43 of file png.c.

Referenced by png_put_interlaced_row().

const uint8_t ff_png_pass_ymask[NB_PASSES]

Definition at line 28 of file png.c.

Referenced by encode_frame(), and png_handle_row().

const uint8_t ff_pngsig[8]

Definition at line 24 of file png.c.

Referenced by decode_frame(), and encode_frame().