h261enc.c File Reference

H.261 encoder. More...

#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "h261.h"
#include "h261enc.h"
#include "mpegvideoenc.h"
#include "put_bits.h"

Go to the source code of this file.

Data Structures
struct	VLCLUT
struct	H261EncContext

Macros
#define	H261_MAX_RUN   26
#define	H261_MAX_LEVEL   15
#define	H261_ESC_LEN   (6 + 6 + 8)
#define	MV_TAB_OFFSET   32

Functions
static int	h261_encode_picture_header (MPVMainEncContext *const m)
static void	h261_encode_gob_header (MPVEncContext *const s, int mb_line)
	Encode a group of blocks header.
void	ff_h261_reorder_mb_index (MPVEncContext *const s)
static void	h261_encode_motion (PutBitContext *pb, int val)
static int	get_cbp (const int block_last_index[6])
static void	h261_encode_block (H261EncContext *h, int16_t *block, int n)
	Encode an 8x8 block.
static void	h261_encode_mb (MPVEncContext *const s, int16_t block[6][64], int motion_x, int motion_y)
static av_cold void	h261_encode_init_static (void)
static av_cold int	h261_encode_init (AVCodecContext *avctx)

Variables
static struct VLCLUT	vlc_lut [H261_MAX_RUN+1][32/*0..2 *H261_MAX_LEN are used */]
static uint8_t	mv_penalty [MAX_FCODE+1][MAX_DMV *2+1]
static uint8_t	uni_h261_rl_len [64 *128]
static uint8_t	uni_h261_rl_len_last [64 *128]
static uint8_t	h261_mv_codes [64][2]
const FFCodec	ff_h261_encoder

Detailed Description

H.261 encoder.

Definition in file h261enc.c.

Macro Definition Documentation

H261_MAX_RUN

#define H261_MAX_RUN   26

Definition at line 40 of file h261enc.c.

Referenced by h261_encode_block().

H261_MAX_LEVEL

#define H261_MAX_LEVEL   15

Definition at line 41 of file h261enc.c.

Referenced by h261_encode_block(), and h261_encode_init_static().

H261_ESC_LEN

#define H261_ESC_LEN   (6 + 6 + 8)

Definition at line 42 of file h261enc.c.

Referenced by h261_encode_init(), and h261_encode_init_static().

MV_TAB_OFFSET

#define MV_TAB_OFFSET   32

Definition at line 43 of file h261enc.c.

Referenced by h261_encode_init_static(), and h261_encode_motion().

Function Documentation

h261_encode_picture_header()

static int h261_encode_picture_header ( MPVMainEncContext *const m )

static

Definition at line 68 of file h261enc.c.

Referenced by h261_encode_init().

h261_encode_gob_header()

static void h261_encode_gob_header ( MPVEncContext *const s, int mb_line )

static

Encode a group of blocks header.

Definition at line 101 of file h261enc.c.

Referenced by ff_h261_reorder_mb_index().

ff_h261_reorder_mb_index()

void ff_h261_reorder_mb_index

(

MPVEncContext *const

s

)

Definition at line 118 of file h261enc.c.

Referenced by encode_thread().

h261_encode_motion()

static void h261_encode_motion ( PutBitContext * pb, int val )

static

Definition at line 146 of file h261enc.c.

Referenced by h261_encode_mb().

get_cbp()

static int get_cbp ( const int block_last_index[6] )

inlinestatic

Definition at line 152 of file h261enc.c.

Referenced by h261_encode_mb().

h261_encode_block()

static void h261_encode_block ( H261EncContext * h, int16_t * block, int n )

static

Encode an 8x8 block.

Parameters

block	the 8x8 block
n	block index (0-3 are luma, 4-5 are chroma)

Definition at line 167 of file h261enc.c.

Referenced by h261_encode_mb().

h261_encode_mb()

static void h261_encode_mb ( MPVEncContext *const s, int16_t block[6][64], int motion_x, int motion_y )

static

Definition at line 227 of file h261enc.c.

Referenced by h261_encode_init().

h261_encode_init_static()

static av_cold void h261_encode_init_static ( void )

static

Definition at line 316 of file h261enc.c.

Referenced by h261_encode_init().

h261_encode_init()

static av_cold int h261_encode_init ( AVCodecContext * avctx )

static

Definition at line 353 of file h261enc.c.

Variable Documentation

vlc_lut

struct VLCLUT vlc_lut[H261_MAX_RUN + 1][32 /* 0..2 * H261_MAX_LEN are used */]

static

Referenced by h261_encode_block(), and h261_encode_init_static().

mv_penalty

uint8_t mv_penalty[MAX_FCODE+1][MAX_DMV *2+1]

static

Definition at line 53 of file h261enc.c.

Referenced by epzs_motion_search_internal(), estimate_motion_b(), ff_h263_get_mv_penalty(), get_mb_score(), h261_encode_init(), h263_mv4_search(), hpel_motion_search(), init_mv_penalty(), interlaced_search(), qpel_motion_search(), and sab_diamond_search().

uni_h261_rl_len

uint8_t uni_h261_rl_len[64 *128]

static

Definition at line 54 of file h261enc.c.

Referenced by h261_encode_init(), and h261_encode_init_static().

uni_h261_rl_len_last

uint8_t uni_h261_rl_len_last[64 *128]

static

Definition at line 55 of file h261enc.c.

Referenced by h261_encode_init(), and h261_encode_init_static().

h261_mv_codes

uint8_t h261_mv_codes[64][2]

static

Definition at line 56 of file h261enc.c.

Referenced by h261_encode_init_static(), and h261_encode_motion().

ff_h261_encoder

const FFCodec ff_h261_encoder

Initial value:

= {
    .p.name         = "h261",
    CODEC_LONG_NAME("H.261"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_H261,
    .p.priv_class   = &ff_mpv_enc_class,
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
    .priv_data_size = sizeof(H261EncContext),
    .init           = h261_encode_init,
    FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
    .close          = ff_mpv_encode_end,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
    CODEC_PIXFMTS(AV_PIX_FMT_YUV420P),
    .color_ranges   = AVCOL_RANGE_MPEG,
}

Definition at line 386 of file h261enc.c.