FFmpeg
Data Structures | Macros | Functions | Variables
libwebpenc_common.h File Reference

WebP encoder using libwebp: common structs and methods. More...

#include <webp/encode.h>
#include "libavutil/common.h"
#include "libavutil/frame.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  LibWebPContextCommon
 

Macros

#define OFFSET(x)   offsetof(LibWebPContextCommon, x)
 
#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 

Functions

int ff_libwebp_error_to_averror (int err)
 
av_cold int ff_libwebp_encode_init_common (AVCodecContext *avctx)
 
int ff_libwebp_get_frame (AVCodecContext *avctx, LibWebPContextCommon *s, const AVFrame *frame, AVFrame **alt_frame_ptr, WebPPicture **pic_ptr)
 

Variables

static const AVOption options []
 
static const AVCodecDefault libwebp_defaults []
 

Detailed Description

WebP encoder using libwebp: common structs and methods.

Definition in file libwebpenc_common.h.

Macro Definition Documentation

#define OFFSET (   x)    offsetof(LibWebPContextCommon, x)

Definition at line 60 of file libwebpenc_common.h.

Definition at line 61 of file libwebpenc_common.h.

Function Documentation

int ff_libwebp_error_to_averror ( int  err)

Definition at line 29 of file libwebpenc_common.c.

Referenced by libwebp_anim_encode_frame(), and libwebp_encode_frame().

av_cold int ff_libwebp_encode_init_common ( AVCodecContext avctx)

Definition at line 43 of file libwebpenc_common.c.

Referenced by libwebp_anim_encode_init(), and libwebp_encode_init().

int ff_libwebp_get_frame ( AVCodecContext avctx,
LibWebPContextCommon s,
const AVFrame frame,
AVFrame **  alt_frame_ptr,
WebPPicture **  pic_ptr 
)

Definition at line 86 of file libwebpenc_common.c.

Referenced by libwebp_anim_encode_frame(), and libwebp_encode_frame().

Variable Documentation

const AVOption options[]
static
Initial value:
= {
{ "lossless", "Use lossless mode", OFFSET(lossless), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
{ "preset", "Configuration preset", OFFSET(preset), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, WEBP_PRESET_TEXT, VE, "preset" },
{ "none", "do not use a preset", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, VE, "preset" },
{ "default", "default preset", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_DEFAULT }, 0, 0, VE, "preset" },
{ "picture", "digital picture, like portrait, inner shot", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_PICTURE }, 0, 0, VE, "preset" },
{ "photo", "outdoor photograph, with natural lighting", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_PHOTO }, 0, 0, VE, "preset" },
{ "drawing", "hand or line drawing, with high-contrast details", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_DRAWING }, 0, 0, VE, "preset" },
{ "icon", "small-sized colorful images", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_ICON }, 0, 0, VE, "preset" },
{ "text", "text-like", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_TEXT }, 0, 0, VE, "preset" },
{ "cr_threshold","Conditional replenishment threshold", OFFSET(cr_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
{ "cr_size" ,"Conditional replenishment block size", OFFSET(cr_size) , AV_OPT_TYPE_INT, { .i64 = 16 }, 0, 256, VE },
{ "quality" ,"Quality", OFFSET(quality), AV_OPT_TYPE_FLOAT, { .dbl = 75 }, 0, 100, VE },
{ NULL },
}
#define NULL
Definition: coverity.c:32
#define VE
#define OFFSET(x)
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about quality
preset
Definition: vf_curves.c:46

Definition at line 62 of file libwebpenc_common.h.

const AVCodecDefault libwebp_defaults[]
static
Initial value:
= {
{ "compression_level", "4" },
{ "global_quality", "-1" },
{ NULL },
}
#define NULL
Definition: coverity.c:32

Definition at line 78 of file libwebpenc_common.h.