libavcodec/pngenc.c File Reference

#include "avcodec.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
Typedefs
typedef struct PNGEncContext	PNGEncContext
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_t *	png_choose_filter (PNGEncContext *s, uint8_t *dst, uint8_t *src, uint8_t *top, int size, int bpp)
static void	convert_from_rgb32 (uint8_t *dst, const uint8_t *src, int width)
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, unsigned char *buf, int buf_size, void *data)
static av_cold int	png_enc_init (AVCodecContext *avctx)
Variables
AVCodec	ff_png_encoder

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Define Documentation

#define IOBUF_SIZE   4096

Definition at line 34 of file pngenc.c.

Referenced by encode_frame(), and png_write_row().

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Typedef Documentation

typedef struct PNGEncContext PNGEncContext

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Function Documentation

static void convert_from_rgb32	(	uint8_t *	dst,
		const uint8_t *	src,
		int	width
	)			[static]

Definition at line 175 of file pngenc.c.

Referenced by encode_frame().

static int encode_frame	(	AVCodecContext *	avctx,
		unsigned char *	buf,
		int	buf_size,
		void *	data
	)			[static]

Definition at line 232 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 145 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 115 of file pngenc.c.

Referenced by png_choose_filter().

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 50 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 192 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 212 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 88 of file pngenc.c.

Referenced by png_filter_row().

---

Variable Documentation

AVCodec ff_png_encoder

Initial value:

 {
    .name           = "png",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_PNG,
    .priv_data_size = sizeof(PNGEncContext),
    .init           = png_enc_init,
    .encode         = encode_frame,
    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_PAL8, PIX_FMT_GRAY8, PIX_FMT_MONOBLACK, PIX_FMT_NONE},
    .long_name= NULL_IF_CONFIG_SMALL("PNG image"),
}

Definition at line 439 of file pngenc.c.