mjpegenc.c File Reference

#include "config_components.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "jpegtables.h"
#include "mjpegenc_common.h"
#include "mjpegenc_huffman.h"
#include "mpegvideo.h"
#include "mjpeg.h"
#include "mjpegenc.h"
#include "mpegvideoenc.h"
#include "profiles.h"

Go to the source code of this file.

Data Structures
struct	MJpegHuffmanCode
	Buffer of JPEG frame data. More...
struct	MJPEGEncContext

Macros
#define	OFFSET(x)   offsetof(MJPEGEncContext, mjpeg.x)
#define	VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
#define	AMV_OPTIONS_OFFSET   4

Functions
static av_cold void	init_uni_ac_vlc (const uint8_t huff_size_ac[256], uint8_t *uni_ac_vlc_len)
static void	mjpeg_encode_picture_header (MPVEncContext *const s)
static int	mjpeg_amv_encode_picture_header (MPVMainEncContext *const m)
int	ff_mjpeg_encode_stuffing (MPVEncContext *const s)
	Writes the complete JPEG frame when optimal huffman tables are enabled, otherwise writes the stuffing. More...
static int	alloc_huffman (MJPEGEncContext *const m2)
static av_cold int	mjpeg_encode_close (AVCodecContext *avctx)
static void	mjpeg_encode_code (MJpegContext *s, uint8_t table_id, int code)
	Add code and table_id to the JPEG buffer. More...
static void	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 (MPVEncContext *const s, int16_t block[], int n)
	Add the block's data into the JPEG buffer. More...
static void	encode_block (MPVEncContext *const s, int16_t block[], int n)
static void	mjpeg_record_mb (MPVEncContext *const s, int16_t block[][64], int unused_x, int unused_y)
static void	mjpeg_encode_mb (MPVEncContext *const s, int16_t block[][64], int unused_x, int unused_y)
static av_cold int	mjpeg_encode_init (AVCodecContext *avctx)

Variables
static const AVOption	options []

Detailed Description

MJPEG encoder.

Definition in file mjpegenc.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(MJPEGEncContext, mjpeg.x)

Definition at line 646 of file mjpegenc.c.

VE

#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 647 of file mjpegenc.c.

AMV_OPTIONS_OFFSET

#define AMV_OPTIONS_OFFSET   4

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 71 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_stuffing(), and mjpeg_encode_init().

mjpeg_encode_picture_header()

static void mjpeg_encode_picture_header ( MPVEncContext *const  s )

static

Definition at line 95 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_stuffing(), and mjpeg_amv_encode_picture_header().

mjpeg_amv_encode_picture_header()

static int mjpeg_amv_encode_picture_header ( MPVMainEncContext *const  m )

static

Definition at line 107 of file mjpegenc.c.

Referenced by mjpeg_encode_init().

ff_mjpeg_encode_stuffing()

int ff_mjpeg_encode_stuffing

(

MPVEncContext *const

s

)

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

Header + values + stuffing.

Parameters

s	The MPVEncContext.

Returns

int Error code, 0 if successful.

Definition at line 238 of file mjpegenc.c.

Referenced by write_slice_end().

alloc_huffman()

static int alloc_huffman ( MJPEGEncContext *const  m2 )

static

Definition at line 287 of file mjpegenc.c.

Referenced by mjpeg_encode_init().

mjpeg_encode_close()

static av_cold int mjpeg_encode_close ( AVCodecContext *  avctx )

static

Definition at line 306 of file mjpegenc.c.

mjpeg_encode_code()

static void 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 321 of file mjpegenc.c.

Referenced by mjpeg_encode_coef(), and record_block().

mjpeg_encode_coef()

static void 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 336 of file mjpegenc.c.

Referenced by record_block().

record_block()

static void record_block ( MPVEncContext *const  s, int16_t  block[], int  n  )

static

Add the block's data into the JPEG buffer.

Parameters

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

Definition at line 364 of file mjpegenc.c.

Referenced by mjpeg_record_mb().

encode_block()

static void encode_block ( MPVEncContext *const  s, int16_t  block[], int  n  )

static

Definition at line 407 of file mjpegenc.c.

Referenced by mjpeg_encode_mb().

mjpeg_record_mb()

static void mjpeg_record_mb ( MPVEncContext *const  s, int16_t  block[][64], int  unused_x, int  unused_y  )

static

Definition at line 465 of file mjpegenc.c.

Referenced by mjpeg_encode_init().

mjpeg_encode_mb()

static void mjpeg_encode_mb ( MPVEncContext *const  s, int16_t  block[][64], int  unused_x, int  unused_y  )

static

Definition at line 497 of file mjpegenc.c.

Referenced by mjpeg_encode_init().

mjpeg_encode_init()

static av_cold int mjpeg_encode_init ( AVCodecContext *  avctx )

static

Definition at line 531 of file mjpegenc.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

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

Definition at line 648 of file mjpegenc.c.