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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 V_MAX   2
 
#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)
 
void ff_mjpeg_encode_picture_frame (MpegEncContext *s)
 Encodes and outputs the entire frame in the JPEG format. More...
 
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])
 
static int amv_encode_picture (AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic_arg, int *got_packet)
 

Variables

static const AVOption options []
 

Detailed Description

MJPEG encoder.

Definition in file mjpegenc.c.

Macro Definition Documentation

#define V_MAX   2

Definition at line 398 of file mjpegenc.c.

Referenced by amv_encode_picture().

#define OFFSET (   x)    offsetof(MpegEncContext, x)

Definition at line 439 of file mjpegenc.c.

Definition at line 440 of file mjpegenc.c.

Function Documentation

static int alloc_huffman ( MpegEncContext s)
static

Definition at line 43 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_init().

av_cold int ff_mjpeg_encode_init ( MpegEncContext s)

Definition at line 71 of file mjpegenc.c.

Referenced by ff_mpv_encode_init().

av_cold void ff_mjpeg_encode_close ( MpegEncContext s)

Definition at line 126 of file mjpegenc.c.

Referenced by ff_mpv_encode_end().

void ff_mjpeg_encode_picture_frame ( MpegEncContext s)

Encodes and outputs the entire frame in the JPEG format.

Parameters
sThe MpegEncContext.

Definition at line 137 of file mjpegenc.c.

Referenced by ff_mjpeg_encode_stuffing().

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
sThe MJpegContext which contains the JPEG buffer.
table_idWhich Huffman table the code belongs to.
codeThe encoded exponent of the coefficients and the run-bits.

Definition at line 187 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
sThe MJpegContext which contains the JPEG buffer.
table_idWhich Huffman table the code belongs to.
valThe coefficient.
runThe run-bits.

Definition at line 202 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
sThe MJpegEncContext that contains the JPEG buffer.
blockThe block.
nThe block's index or number.

Definition at line 230 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 273 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 331 of file mjpegenc.c.

Referenced by encode_mb_internal().

static int amv_encode_picture ( AVCodecContext avctx,
AVPacket pkt,
const AVFrame pic_arg,
int got_packet 
)
static

Definition at line 399 of file mjpegenc.c.

Variable Documentation

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" },
{ "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},
}
#define NULL
Definition: coverity.c:32
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:605
Use the default Huffman tables.
Definition: mjpegenc.h:96
Compute and use optimal Huffman tables.
Definition: mjpegenc.h:97
static const float pred[4]
Definition: siprdata.h:259
#define OFFSET(x)
Definition: mjpegenc.c:439
#define VE
Definition: mjpegenc.c:440

Definition at line 441 of file mjpegenc.c.