libavcodec/pngenc.c File Reference

#include "avcodec.h"
#include "internal.h"
#include "bytestream.h"
#include "dsputil.h"
#include "png.h"
#include <zlib.h>

Go to the source code of this file.

Data Structures

struct  PNGEncContext

Defines

#define IOBUF_SIZE   4096

Functions

static void png_get_interlaced_row (uint8_t *dst, int row_size, int bits_per_pixel, int pass, const uint8_t *src, int width)
static void sub_png_paeth_prediction (uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp)
static void png_filter_row (DSPContext *dsp, uint8_t *dst, int filter_type, uint8_t *src, uint8_t *top, int size, int bpp)
static uint8_tpng_choose_filter (PNGEncContext *s, uint8_t *dst, uint8_t *src, uint8_t *top, int size, int bpp)
static void png_write_chunk (uint8_t **f, uint32_t tag, const uint8_t *buf, int length)
static int png_write_row (PNGEncContext *s, const uint8_t *data, int size)
static int encode_frame (AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
static av_cold int png_enc_init (AVCodecContext *avctx)

Variables

AVCodec ff_png_encoder


Define Documentation

#define IOBUF_SIZE   4096

Definition at line 35 of file pngenc.c.

Referenced by encode_frame(), and png_write_row().


Function Documentation

static int encode_frame ( AVCodecContext avctx,
AVPacket pkt,
const AVFrame pict,
int *  got_packet 
) [static]

Definition at line 216 of file pngenc.c.

static uint8_t* png_choose_filter ( PNGEncContext s,
uint8_t dst,
uint8_t src,
uint8_t top,
int  size,
int  bpp 
) [static]

Definition at line 146 of file pngenc.c.

Referenced by encode_frame().

static av_cold int png_enc_init ( AVCodecContext avctx  )  [static]

Definition at line 425 of file pngenc.c.

static void png_filter_row ( DSPContext dsp,
uint8_t dst,
int  filter_type,
uint8_t src,
uint8_t top,
int  size,
int  bpp 
) [static]

Definition at line 116 of file pngenc.c.

static void png_get_interlaced_row ( uint8_t dst,
int  row_size,
int  bits_per_pixel,
int  pass,
const uint8_t src,
int  width 
) [static]

Definition at line 51 of file pngenc.c.

Referenced by encode_frame().

static void png_write_chunk ( uint8_t **  f,
uint32_t  tag,
const uint8_t buf,
int  length 
) [static]

Definition at line 176 of file pngenc.c.

Referenced by encode_frame(), and png_write_row().

static int png_write_row ( PNGEncContext s,
const uint8_t data,
int  size 
) [static]

Definition at line 196 of file pngenc.c.

Referenced by encode_frame().

static void sub_png_paeth_prediction ( uint8_t dst,
uint8_t src,
uint8_t top,
int  w,
int  bpp 
) [static]

Definition at line 89 of file pngenc.c.

Referenced by png_filter_row().


Variable Documentation

Initial value:

 {
    .name           = "png",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_PNG,
    .priv_data_size = sizeof(PNGEncContext),
    .init           = png_enc_init,
    .encode2        = encode_frame,
    .pix_fmts       = (const enum PixelFormat[]){
        PIX_FMT_RGB24, PIX_FMT_RGBA,
        PIX_FMT_RGB48BE, PIX_FMT_RGBA64BE,
        PIX_FMT_PAL8,
        PIX_FMT_GRAY8, PIX_FMT_GRAY8A,
        PIX_FMT_GRAY16BE,
        PIX_FMT_MONOBLACK, PIX_FMT_NONE
    },
    .long_name      = NULL_IF_CONFIG_SMALL("PNG (Portable Network Graphics) image"),
}

Definition at line 439 of file pngenc.c.


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