mjpegenc.c File Reference

MJPEG encoder. More...

#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "jpegtables.h"
#include "mjpegenc_common.h"
#include "mpegvideo.h"
#include "mjpeg.h"
#include "mjpegenc.h"

Go to the source code of this file.

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

Functions
static int	alloc_huffman (MpegEncContext *s)
av_cold int	ff_mjpeg_encode_init (MpegEncContext *s)
av_cold void	ff_mjpeg_encode_close (MpegEncContext *s)
static void	ff_mjpeg_encode_code (MJpegContext *s, uint8_t table_id, int code)
	Add code and table_id to the JPEG buffer. More...
static void	ff_mjpeg_encode_coef (MJpegContext *s, uint8_t table_id, int val, int run)
	Add the coefficient's data to the JPEG buffer. More...
static void	record_block (MpegEncContext *s, int16_t *block, int n)
	Add the block's data into the JPEG buffer. More...
static void	encode_block (MpegEncContext *s, int16_t *block, int n)
void	ff_mjpeg_encode_mb (MpegEncContext *s, int16_t block[12][64])

Variables
static const AVOption	options []

Detailed Description

MJPEG encoder.

Definition in file mjpegenc.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(MpegEncContext, x)

Definition at line 391 of file mjpegenc.c.

#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 392 of file mjpegenc.c.

Function Documentation

static int alloc_huffman ( MpegEncContext *  s )

static

Definition at line 42 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_init().

av_cold int ff_mjpeg_encode_init

(

MpegEncContext *

s

)

Definition at line 70 of file mjpegenc.c.

Referenced by ff_mpv_encode_init().

av_cold void ff_mjpeg_encode_close

(

MpegEncContext *

s

)

Definition at line 125 of file mjpegenc.c.

Referenced by ff_mpv_encode_end().

static void ff_mjpeg_encode_code ( MJpegContext *  s, uint8_t  table_id, int  code  )

inlinestatic

Add code and table_id to the JPEG buffer.

Parameters

s	The MJpegContext which contains the JPEG buffer.
table_id	Which Huffman table the code belongs to.
code	The encoded exponent of the coefficients and the run-bits.

Definition at line 138 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_coef(), and record_block().

static void ff_mjpeg_encode_coef ( MJpegContext *  s, uint8_t  table_id, int  val, int  run  )

static

Add the coefficient's data to the JPEG buffer.

Parameters

s	The MJpegContext which contains the JPEG buffer.
table_id	Which Huffman table the code belongs to.
val	The coefficient.
run	The run-bits.

Definition at line 153 of file mjpegenc.c.

Referenced by record_block().

static void record_block ( MpegEncContext *  s, int16_t *  block, int  n  )

static

Add the block's data into the JPEG buffer.

Parameters

s	The MJpegEncContext that contains the JPEG buffer.
block	The block.
n	The block's index or number.

Definition at line 181 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_mb().

static void encode_block ( MpegEncContext *  s, int16_t *  block, int  n  )

static

Definition at line 224 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_mb().

void ff_mjpeg_encode_mb	(	MpegEncContext *	s,
		int16_t	block[12][64]
	)

Definition at line 282 of file mjpegenc.c.

Referenced by encode_mb_internal().

Variable Documentation

const AVOption options[]

static

Initial value:

= {
FF_MPV_COMMON_OPTS
{ "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" },
{ "huffman", "Huffman table strategy", OFFSET(huffman), AV_OPT_TYPE_INT, { .i64 = HUFFMAN_TABLE_OPTIMAL }, 0, NB_HUFFMAN_TABLE_OPTION - 1, VE, "huffman" },
    { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_DEFAULT }, INT_MIN, INT_MAX, VE, "huffman" },
    { "optimal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_OPTIMAL }, INT_MIN, INT_MAX, VE, "huffman" },
{ NULL},
}

Definition at line 393 of file mjpegenc.c.