ljpegenc.c File Reference

lossless JPEG encoder. More...

#include "libavutil/frame.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "encode.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)
#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
const FFCodec	ff_ljpeg_encoder

Detailed Description

lossless JPEG encoder.

Definition in file ljpegenc.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(LJpegEncContext, x)

Definition at line 296 of file ljpegenc.c.

VE

#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 297 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 59 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 121 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 186 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 208 of file ljpegenc.c.

ljpeg_encode_close()

static av_cold int ljpeg_encode_close ( AVCodecContext * avctx )

static

Definition at line 261 of file ljpegenc.c.

ljpeg_encode_init()

static av_cold int ljpeg_encode_init ( AVCodecContext * avctx )

static

Definition at line 270 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, .unit = "pred" },
    { "left",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
    { "plane",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
    { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
 
    { NULL},
}

Definition at line 298 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 307 of file ljpegenc.c.

ff_ljpeg_encoder

const FFCodec ff_ljpeg_encoder

Initial value:

= {
    .p.name         = "ljpeg",
    CODEC_LONG_NAME("Lossless JPEG"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_LJPEG,
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
                      AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
    .priv_data_size = sizeof(LJpegEncContext),
    .p.priv_class   = &ljpeg_class,
    .init           = ljpeg_encode_init,
    FF_CODEC_ENCODE_CB(ljpeg_encode_frame),
    .close          = ljpeg_encode_close,
    CODEC_PIXFMTS(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),
    .color_ranges   = AVCOL_RANGE_MPEG | AVCOL_RANGE_JPEG,
}

Definition at line 314 of file ljpegenc.c.