mjpegenc.c File Reference

#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "jpegtables.h"
#include "mjpegenc_common.h"
#include "mjpegenc_huffman.h"
#include "mpegvideo.h"
#include "mjpeg.h"
#include "mjpegenc.h"
#include "profiles.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 av_cold void	init_uni_ac_vlc (const uint8_t huff_size_ac[256], uint8_t *uni_ac_vlc_len)
int	ff_mjpeg_encode_stuffing (MpegEncContext *s)
	Writes the complete JPEG frame when optimal huffman tables are enabled, otherwise writes the stuffing. More...
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

OFFSET

#define OFFSET

(

x

)

offsetof(MpegEncContext, x)

Definition at line 585 of file mjpegenc.c.

VE

#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 586 of file mjpegenc.c.

Function Documentation

init_uni_ac_vlc()

static av_cold void init_uni_ac_vlc ( const uint8_t  huff_size_ac[256], uint8_t *  uni_ac_vlc_len  )

static

Definition at line 44 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_init(), and ff_mjpeg_encode_stuffing().

ff_mjpeg_encode_stuffing()

int ff_mjpeg_encode_stuffing

(

MpegEncContext *

s

)

Writes the complete JPEG frame when optimal huffman tables are enabled, otherwise writes the stuffing.

Header + values + stuffing.

Parameters

s	The MpegEncContext.

Returns

int Error code, 0 if successful.

Definition at line 186 of file mjpegenc.c.

Referenced by write_slice_end().

alloc_huffman()

static int alloc_huffman ( MpegEncContext *  s )

static

Definition at line 233 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_init().

ff_mjpeg_encode_init()

av_cold int ff_mjpeg_encode_init

(

MpegEncContext *

s

)

Definition at line 261 of file mjpegenc.c.

Referenced by ff_mpv_encode_init().

ff_mjpeg_encode_close()

av_cold void ff_mjpeg_encode_close

(

MpegEncContext *

s

)

Definition at line 323 of file mjpegenc.c.

Referenced by ff_mpv_encode_end().

ff_mjpeg_encode_code()

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 338 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_coef(), and record_block().

ff_mjpeg_encode_coef()

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 353 of file mjpegenc.c.

Referenced by record_block().

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 381 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_mb().

encode_block()

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

static

Definition at line 424 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_mb().

ff_mjpeg_encode_mb()

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

Definition at line 482 of file mjpegenc.c.

Referenced by encode_mb_internal().

Variable Documentation

options

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" },
{ "force_duplicated_matrix", "Always write luma and chroma matrix for mjpeg, useful for rtp streaming.", OFFSET(force_duplicated_matrix), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, VE },
 
FF_MPV_DEPRECATED_MPEG_QUANT_OPT
FF_MPV_DEPRECATED_A53_CC_OPT
FF_MPV_DEPRECATED_BFRAME_OPTS
 
{ NULL},
}

Definition at line 587 of file mjpegenc.c.