ljpegenc.c File Reference

lossless JPEG encoder. More...

#include "libavutil/frame.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "idctdsp.h"
#include "internal.h"
#include "jpegtables.h"
#include "mjpegenc_common.h"
#include "mjpeg.h"

Go to the source code of this file.

Data Structures
struct	LJpegEncContext

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

Functions
static int	ljpeg_encode_bgr (AVCodecContext *avctx, PutBitContext *pb, const AVFrame *frame)
static void	ljpeg_encode_yuv_mb (LJpegEncContext *s, PutBitContext *pb, const AVFrame *frame, int predictor, int mb_x, int mb_y)
static int	ljpeg_encode_yuv (AVCodecContext *avctx, PutBitContext *pb, const AVFrame *frame)
static int	ljpeg_encode_frame (AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
static av_cold int	ljpeg_encode_close (AVCodecContext *avctx)
static av_cold int	ljpeg_encode_init (AVCodecContext *avctx)

Variables
static const AVOption	options []
static const AVClass	ljpeg_class
AVCodec	ff_ljpeg_encoder

Detailed Description

lossless JPEG encoder.

Definition in file ljpegenc.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(LJpegEncContext, x)

Definition at line 335 of file ljpegenc.c.

VE

#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 336 of file ljpegenc.c.

Function Documentation

ljpeg_encode_bgr()

static int ljpeg_encode_bgr ( AVCodecContext *  avctx, PutBitContext *  pb, const AVFrame *  frame  )

static

Definition at line 62 of file ljpegenc.c.

Referenced by ljpeg_encode_frame().

ljpeg_encode_yuv_mb()

static void ljpeg_encode_yuv_mb ( LJpegEncContext *  s, PutBitContext *  pb, const AVFrame *  frame, int  predictor, int  mb_x, int  mb_y  )

inlinestatic

Definition at line 131 of file ljpegenc.c.

Referenced by ljpeg_encode_yuv().

ljpeg_encode_yuv()

static int ljpeg_encode_yuv ( AVCodecContext *  avctx, PutBitContext *  pb, const AVFrame *  frame  )

static

Definition at line 196 of file ljpegenc.c.

Referenced by ljpeg_encode_frame().

ljpeg_encode_frame()

static int ljpeg_encode_frame ( AVCodecContext *  avctx, AVPacket *  pkt, const AVFrame *  pict, int *  got_packet  )

static

Definition at line 225 of file ljpegenc.c.

ljpeg_encode_close()

static av_cold int ljpeg_encode_close ( AVCodecContext *  avctx )

static

Definition at line 279 of file ljpegenc.c.

Referenced by ljpeg_encode_init().

ljpeg_encode_init()

static av_cold int ljpeg_encode_init ( AVCodecContext *  avctx )

static

Definition at line 288 of file ljpegenc.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
{ "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" },
    { "left",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
    { "plane",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" },
    { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" },

    { NULL},
}

Definition at line 337 of file ljpegenc.c.

ljpeg_class

const AVClass ljpeg_class

static

Initial value:

= {
    .class_name = "ljpeg",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 346 of file ljpegenc.c.

ff_ljpeg_encoder

AVCodec ff_ljpeg_encoder

Initial value:

= {
    .name           = "ljpeg",
    .long_name      = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_LJPEG,
    .priv_data_size = sizeof(LJpegEncContext),
    .priv_class     = &ljpeg_class,
    .init           = ljpeg_encode_init,
    .encode2        = ljpeg_encode_frame,
    .close          = ljpeg_encode_close,
    .capabilities   = AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_INTRA_ONLY,
    .pix_fmts       = (const enum AVPixelFormat[]){
        AV_PIX_FMT_BGR24   , AV_PIX_FMT_BGRA    , AV_PIX_FMT_BGR0,
        AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
        AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
        AV_PIX_FMT_NONE},
}

Definition at line 353 of file ljpegenc.c.