FFmpeg
Macros | Functions | Variables
png.h File Reference
#include <stdint.h>
#include "pngdsp.h"

Go to the source code of this file.

Macros

#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 NB_PASSES   7
 
#define PNGSIG   0x89504e470d0a1a0a
 
#define MNGSIG   0x8a4d4e470d0a1a0a
 

Functions

voidff_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_filter_row (PNGDSPContext *dsp, uint8_t *dst, int filter_type, uint8_t *src, uint8_t *last, int size, int bpp)
 

Variables

const uint8_t ff_png_pass_ymask [NB_PASSES]
 

Macro Definition Documentation

#define PNG_COLOR_MASK_PALETTE   1

Definition at line 29 of file png.h.

Referenced by ff_png_get_nb_channels().

#define PNG_COLOR_MASK_COLOR   2

Definition at line 30 of file png.h.

Referenced by ff_png_get_nb_channels().

#define PNG_COLOR_MASK_ALPHA   4

Definition at line 31 of file png.h.

Referenced by ff_png_get_nb_channels().

#define PNG_COLOR_TYPE_GRAY   0

Definition at line 33 of file png.h.

Referenced by decode_idat_chunk(), decode_trns_chunk(), and png_enc_init().

#define PNG_COLOR_TYPE_PALETTE   (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
#define PNG_COLOR_TYPE_RGB   (PNG_COLOR_MASK_COLOR)

Definition at line 35 of file png.h.

Referenced by decode_idat_chunk(), decode_trns_chunk(), and png_enc_init().

#define PNG_COLOR_TYPE_RGB_ALPHA   (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)

Definition at line 36 of file png.h.

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

#define PNG_COLOR_TYPE_GRAY_ALPHA   (PNG_COLOR_MASK_ALPHA)

Definition at line 37 of file png.h.

Referenced by decode_idat_chunk(), and png_enc_init().

#define PNG_FILTER_TYPE_LOCO   64

Definition at line 39 of file png.h.

Referenced by png_handle_row().

#define PNG_FILTER_VALUE_NONE   0

Definition at line 40 of file png.h.

Referenced by ff_png_filter_row(), png_enc_init(), and png_filter_row().

#define PNG_FILTER_VALUE_SUB   1

Definition at line 41 of file png.h.

Referenced by ff_png_filter_row(), png_choose_filter(), and png_filter_row().

#define PNG_FILTER_VALUE_UP   2

Definition at line 42 of file png.h.

Referenced by ff_png_filter_row(), and png_filter_row().

#define PNG_FILTER_VALUE_AVG   3

Definition at line 43 of file png.h.

Referenced by ff_png_filter_row(), and png_filter_row().

#define PNG_FILTER_VALUE_PAETH   4

Definition at line 44 of file png.h.

Referenced by ff_png_filter_row(), and png_filter_row().

#define PNG_FILTER_VALUE_MIXED   5

Definition at line 45 of file png.h.

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

#define NB_PASSES   7

Definition at line 47 of file png.h.

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

#define PNGSIG   0x89504e470d0a1a0a
#define MNGSIG   0x8a4d4e470d0a1a0a

Definition at line 50 of file png.h.

Referenced by output_frame(), and png_parse().

Function Documentation

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

Definition at line 39 of file png.c.

Referenced by decode_frame_lscr(), decode_zbuf(), output_frame(), and png_enc_init().

void ff_png_zfree ( void opaque,
void ptr 
)

Definition at line 44 of file png.c.

Referenced by decode_frame_lscr(), decode_zbuf(), output_frame(), and png_enc_init().

int ff_png_get_nb_channels ( int  color_type)

Definition at line 49 of file png.c.

Referenced by decode_idat_chunk(), and png_enc_init().

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

Definition at line 62 of file png.c.

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

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

Definition at line 198 of file pngdec.c.

Referenced by ff_png_filter_row(), and ff_pngdsp_init().

void ff_png_filter_row ( PNGDSPContext dsp,
uint8_t dst,
int  filter_type,
uint8_t src,
uint8_t last,
int  size,
int  bpp 
)

Definition at line 264 of file pngdec.c.

Referenced by handle_row(), and png_handle_row().

Variable Documentation

const uint8_t ff_png_pass_ymask[NB_PASSES]

Definition at line 25 of file png.c.

Referenced by encode_frame(), and png_handle_row().