libavcodec/h263.h File Reference

#include <stdint.h>
#include "libavutil/rational.h"
#include "get_bits.h"
#include "mpegvideo.h"
#include "rl.h"

Go to the source code of this file.

Defines
#define	INTRA_MCBPC_VLC_BITS   6
#define	INTER_MCBPC_VLC_BITS   7
#define	CBPY_VLC_BITS   6
#define	TEX_VLC_BITS   9
Functions
int	ff_h263_decode_motion (MpegEncContext *s, int pred, int f_code)
av_const int	ff_h263_aspect_to_info (AVRational aspect)
	Return the 4 bit value that specifies the given aspect ratio.
int	ff_h263_decode_init (AVCodecContext *avctx)
int	ff_h263_decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
int	ff_h263_decode_end (AVCodecContext *avctx)
void	ff_h263_encode_mb (MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
void	ff_h263_encode_picture_header (MpegEncContext *s, int picture_number)
void	ff_h263_encode_gob_header (MpegEncContext *s, int mb_line)
	Encode a group of blocks header.
int16_t *	ff_h263_pred_motion (MpegEncContext *s, int block, int dir, int *px, int *py)
void	ff_h263_encode_init (MpegEncContext *s)
void	ff_h263_decode_init_vlc (MpegEncContext *s)
int	ff_h263_decode_picture_header (MpegEncContext *s)
int	ff_h263_decode_gob_header (MpegEncContext *s)
void	ff_h263_update_motion_val (MpegEncContext *s)
void	ff_h263_loop_filter (MpegEncContext *s)
int	ff_h263_decode_mba (MpegEncContext *s)
void	ff_h263_encode_mba (MpegEncContext *s)
void	ff_init_qscale_tab (MpegEncContext *s)
	init s->current_picture.qscale_table from s->lambda_table
int	ff_h263_pred_dc (MpegEncContext *s, int n, int16_t **dc_val_ptr)
void	ff_h263_pred_acdc (MpegEncContext *s, DCTELEM *block, int n)
void	ff_h263_show_pict_info (MpegEncContext *s)
	Print picture info if FF_DEBUG_PICT_INFO is set.
int	ff_intel_h263_decode_picture_header (MpegEncContext *s)
int	ff_h263_decode_mb (MpegEncContext *s, DCTELEM block[6][64])
int av_const	h263_get_picture_format (int width, int height)
	Return the value of the 3bit "source format" syntax element.
void	ff_clean_h263_qscales (MpegEncContext *s)
	modify qscale so that encoding is actually possible in h263 (limit difference to -2.
int	ff_h263_resync (MpegEncContext *s)
	Decode the group of blocks / video packet header.
const uint8_t *	ff_h263_find_resync_marker (const uint8_t *p, const uint8_t *end)
int	ff_h263_get_gob_height (MpegEncContext *s)
	Get the GOB height based on picture height.
void	ff_h263_encode_motion (MpegEncContext *s, int val, int f_code)
static int	h263_get_motion_length (MpegEncContext *s, int val, int f_code)
static void	ff_h263_encode_motion_vector (MpegEncContext *s, int x, int y, int f_code)
static int	get_p_cbp (MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
static void	memsetw (short *tab, int val, int n)
Variables
const AVRational	ff_h263_pixel_aspect [16]
const uint8_t	ff_h263_cbpy_tab [16][2]
const uint8_t	ff_cbpc_b_tab [4][2]
const uint8_t	ff_mvtab [33][2]
const uint8_t	ff_h263_intra_MCBPC_code [9]
const uint8_t	ff_h263_intra_MCBPC_bits [9]
const uint8_t	ff_h263_inter_MCBPC_code [28]
const uint8_t	ff_h263_inter_MCBPC_bits [28]
const uint8_t	ff_h263_mbtype_b_tab [15][2]
VLC	ff_h263_intra_MCBPC_vlc
VLC	ff_h263_inter_MCBPC_vlc
VLC	ff_h263_cbpy_vlc
RLTable	ff_h263_rl_inter
RLTable	ff_rl_intra_aic
const uint16_t	ff_h263_format [8][2]
const uint8_t	ff_modified_quant_tab [2][32]
const uint16_t	ff_mba_max [6]
const uint8_t	ff_mba_length [7]
uint8_t	ff_h263_static_rl_table_store [2][2][2 *MAX_RUN+MAX_LEVEL+3]

---

Define Documentation

#define CBPY_VLC_BITS   6

Definition at line 35 of file h263.h.

Referenced by ff_h263_decode_init_vlc(), ff_h263_decode_mb(), mpeg4_decode_mb(), mpeg4_decode_partition_b(), msmpeg4v12_decode_mb(), and preview_obmc().

#define INTER_MCBPC_VLC_BITS   7

Definition at line 34 of file h263.h.

Referenced by ff_h263_decode_init_vlc(), ff_h263_decode_mb(), mpeg4_decode_mb(), mpeg4_decode_partition_a(), msmpeg4v12_decode_mb(), and preview_obmc().

#define INTRA_MCBPC_VLC_BITS   6

Definition at line 33 of file h263.h.

Referenced by ff_h263_decode_init_vlc(), ff_h263_decode_mb(), mpeg4_decode_mb(), mpeg4_decode_partition_a(), and msmpeg4v12_decode_mb().

#define TEX_VLC_BITS   9

Definition at line 36 of file h263.h.

---

Function Documentation

void ff_clean_h263_qscales

(

MpegEncContext *

s

)

modify qscale so that encoding is actually possible in h263 (limit difference to -2.

.2)

Definition at line 273 of file ituh263enc.c.

Referenced by estimate_qp(), and ff_clean_mpeg4_qscales().

av_const int ff_h263_aspect_to_info

(

AVRational

aspect

)

Return the 4 bit value that specifies the given aspect ratio.

This may be one of the standard aspect ratios or it specifies that the aspect will be stored explicitly later.

Definition at line 88 of file ituh263enc.c.

Referenced by ff_h263_encode_picture_header(), and mpeg4_encode_vol_header().

int ff_h263_decode_end

(

AVCodecContext *

avctx

)

Definition at line 129 of file h263dec.c.

Referenced by wmv2_decode_end().

int ff_h263_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)

Definition at line 348 of file h263dec.c.

int ff_h263_decode_gob_header

(

MpegEncContext *

s

)

int ff_h263_decode_init

(

AVCodecContext *

avctx

)

Definition at line 47 of file h263dec.c.

Referenced by decode_init(), and ff_msmpeg4_decode_init().

void ff_h263_decode_init_vlc

(

MpegEncContext *

s

)

Definition at line 103 of file ituh263dec.c.

Referenced by ff_h263_decode_init(), and rv10_decode_init().

int ff_h263_decode_mb	(	MpegEncContext *	s,
		DCTELEM	block[6][64]
	)

Definition at line 600 of file ituh263dec.c.

Referenced by ff_h263_decode_init(), and rv10_decode_packet().

int ff_h263_decode_mba

(

MpegEncContext *

s

)

Definition at line 135 of file ituh263dec.c.

Referenced by ff_h263_decode_picture_header(), h263_decode_gob_header(), and rv20_decode_picture_header().

int ff_h263_decode_motion	(	MpegEncContext *	s,
		int	pred,
		int	f_code
	)

Definition at line 271 of file ituh263dec.c.

Referenced by ff_h263_decode_mb(), mpeg4_decode_mb(), mpeg4_decode_partition_a(), and preview_obmc().

int ff_h263_decode_picture_header

(

MpegEncContext *

s

)

Definition at line 866 of file ituh263dec.c.

Referenced by ff_h263_decode_frame().

void ff_h263_encode_gob_header	(	MpegEncContext *	s,
		int	mb_line
	)

Encode a group of blocks header.

Definition at line 247 of file ituh263enc.c.

Referenced by encode_thread().

void ff_h263_encode_init

(

MpegEncContext *

s

)

Definition at line 768 of file ituh263enc.c.

Referenced by encode_init(), ff_MPV_encode_init(), and svq1_encode_init().

void ff_h263_encode_mb	(	MpegEncContext *	s,
		DCTELEM	block[6][64],
		int	motion_x,
		int	motion_y
	)

Definition at line 454 of file ituh263enc.c.

Referenced by encode_mb_internal().

void ff_h263_encode_mba

(

MpegEncContext *

s

)

Definition at line 829 of file ituh263enc.c.

Referenced by ff_h263_encode_gob_header(), ff_h263_encode_picture_header(), and ff_rv20_encode_picture_header().

void ff_h263_encode_motion	(	MpegEncContext *	s,
		int	val,
		int	f_code
	)

Definition at line 655 of file ituh263enc.c.

Referenced by ff_h263_encode_motion_vector(), and svq1_encode_plane().

static void ff_h263_encode_motion_vector	(	MpegEncContext *	s,
		int	x,
		int	y,
		int	f_code
	)			[inline, static]

Definition at line 135 of file h263.h.

Referenced by ff_h263_encode_mb(), and ff_mpeg4_encode_mb().

void ff_h263_encode_picture_header	(	MpegEncContext *	s,
		int	picture_number
	)

Definition at line 102 of file ituh263enc.c.

Referenced by encode_picture().

const uint8_t* ff_h263_find_resync_marker	(	const uint8_t *	p,
		const uint8_t *	end
	)

Referenced by decode_slice().

int ff_h263_get_gob_height

(

MpegEncContext *

s

)

Get the GOB height based on picture height.

Definition at line 378 of file h263.c.

Referenced by encode_thread(), ff_h263_decode_frame(), and vaapi_mpeg4_start_frame().

void ff_h263_loop_filter

(

MpegEncContext *

s

)

Definition at line 142 of file h263.c.

Referenced by decode_slice(), encode_thread(), and rv10_decode_packet().

void ff_h263_pred_acdc	(	MpegEncContext *	s,
		DCTELEM *	block,
		int	n
	)

Definition at line 229 of file h263.c.

Referenced by h263_decode_block().

int ff_h263_pred_dc	(	MpegEncContext *	s,
		int	n,
		int16_t **	dc_val_ptr
	)

Definition at line 101 of file h263.c.

Referenced by ff_h263_encode_mb().

int16_t* ff_h263_pred_motion	(	MpegEncContext *	s,
		int	block,
		int	dir,
		int *	px,
		int *	py
	)

Definition at line 316 of file h263.c.

Referenced by ff_h263_decode_mb(), ff_h263_encode_mb(), ff_mpeg4_encode_mb(), ff_msmpeg4_encode_mb(), ff_wmv2_encode_mb(), mpeg4_decode_mb(), mpeg4_decode_partition_a(), msmpeg4v12_decode_mb(), msmpeg4v34_decode_mb(), preview_obmc(), svq1_encode_plane(), and write_mb_info().

int ff_h263_resync

(

MpegEncContext *

s

)

Decode the group of blocks / video packet header.

Returns:

bit position of the resync_marker, or <0 if none was found

Definition at line 229 of file ituh263dec.c.

Referenced by ff_h263_decode_frame().

void ff_h263_show_pict_info

(

MpegEncContext *

s

)

Print picture info if FF_DEBUG_PICT_INFO is set.

Definition at line 71 of file ituh263dec.c.

Referenced by ff_h263_decode_picture_header(), and ff_intel_h263_decode_picture_header().

void ff_h263_update_motion_val

(

MpegEncContext *

s

)

Definition at line 49 of file h263.c.

Referenced by decode_slice(), encode_thread(), and rv10_decode_packet().

void ff_init_qscale_tab

(

MpegEncContext *

s

)

init s->current_picture.qscale_table from s->lambda_table

Definition at line 174 of file mpegvideo_enc.c.

Referenced by estimate_qp(), and ff_clean_h263_qscales().

int ff_intel_h263_decode_picture_header

(

MpegEncContext *

s

)

Definition at line 25 of file intelh263dec.c.

Referenced by ff_h263_decode_frame().

static int get_p_cbp	(	MpegEncContext *	s,
		DCTELEM	block[6][64],
		int	motion_x,
		int	motion_y
	)			[inline, static]

Definition at line 146 of file h263.h.

Referenced by ff_h263_encode_mb(), and ff_mpeg4_encode_mb().

static int h263_get_motion_length	(	MpegEncContext *	s,
		int	val,
		int	f_code
	)			[inline, static]

Definition at line 118 of file h263.h.

Referenced by ff_h263_encode_motion_vector().

int av_const h263_get_picture_format	(	int	width,
		int	height
	)

Return the value of the 3bit "source format" syntax element.

This represents some standard picture dimensions or indicates that width&height are explicitly stored later.

static void memsetw	(	short *	tab,
		int	val,
		int	n
	)			[inline, static]

Definition at line 203 of file h263.h.

Referenced by ff_mpeg4_clean_buffers().

---

Variable Documentation

const uint8_t ff_cbpc_b_tab[4][2]

Definition at line 78 of file h263data.h.

Referenced by ff_h263_decode_init_vlc().

const uint8_t ff_h263_cbpy_tab[16][2]

Definition at line 85 of file h263data.h.

Referenced by ff_h263_decode_init_vlc(), ff_h263_encode_mb(), ff_mpeg4_encode_mb(), ff_msmpeg4_encode_mb(), and get_p_cbp().

VLC ff_h263_cbpy_vlc

Definition at line 95 of file ituh263dec.c.

Referenced by mpeg4_decode_mb(), mpeg4_decode_partition_b(), and msmpeg4v12_decode_mb().

const uint16_t ff_h263_format[8][2]

Definition at line 239 of file h263data.h.

Referenced by ff_h263_decode_picture_header(), ff_h263_encode_picture_header(), ff_intel_h263_decode_picture_header(), and ff_MPV_encode_init().

const uint8_t ff_h263_inter_MCBPC_bits[28]

Definition at line 50 of file h263data.h.

Referenced by ff_h263_decode_init_vlc(), ff_h263_encode_mb(), ff_mpeg4_encode_mb(), and get_p_cbp().

const uint8_t ff_h263_inter_MCBPC_code[28]

Definition at line 41 of file h263data.h.

Referenced by ff_h263_decode_init_vlc(), ff_h263_encode_mb(), and ff_mpeg4_encode_mb().

VLC ff_h263_inter_MCBPC_vlc

Definition at line 94 of file ituh263dec.c.

Referenced by mpeg4_decode_mb(), mpeg4_decode_partition_a(), and msmpeg4v12_decode_mb().

const uint8_t ff_h263_intra_MCBPC_bits[9]

Definition at line 37 of file h263data.h.

Referenced by ff_h263_decode_init_vlc(), ff_h263_encode_mb(), and ff_mpeg4_encode_mb().

const uint8_t ff_h263_intra_MCBPC_code[9]

Definition at line 36 of file h263data.h.

Referenced by ff_h263_decode_init_vlc(), ff_h263_encode_mb(), and ff_mpeg4_encode_mb().

VLC ff_h263_intra_MCBPC_vlc

Definition at line 93 of file ituh263dec.c.

Referenced by mpeg4_decode_mb(), mpeg4_decode_partition_a(), and msmpeg4v12_decode_mb().

const uint8_t ff_h263_mbtype_b_tab[15][2]

Definition at line 60 of file h263data.h.

Referenced by ff_h263_decode_init_vlc().

const AVRational ff_h263_pixel_aspect[16]

Definition at line 280 of file h263data.h.

Referenced by decode_vol_header(), ff_h263_aspect_to_info(), ff_h263_decode_picture_header(), and ff_intel_h263_decode_picture_header().

RLTable ff_h263_rl_inter

Definition at line 162 of file h263data.h.

Referenced by encode_init(), ff_h263_decode_init_vlc(), ff_h263_encode_init(), h263_decode_block(), h263_encode_block(), and mpeg4_decode_block().

uint8_t ff_h263_static_rl_table_store[2][2][2 *MAX_RUN+MAX_LEVEL+3]

Definition at line 46 of file h263.c.

Referenced by ff_h263_decode_init_vlc(), and ff_h263_encode_init().

const uint8_t ff_mba_length[7]

Definition at line 271 of file h263data.h.

Referenced by ff_h263_decode_mba(), and ff_h263_encode_mba().

const uint16_t ff_mba_max[6]

Definition at line 267 of file h263data.h.

Referenced by ff_h263_decode_mba(), and ff_h263_encode_mba().

const uint8_t ff_modified_quant_tab[2][32]

Definition at line 253 of file h263data.h.

Referenced by h263_decode_dquant().

const uint8_t ff_mvtab[33][2]

Definition at line 91 of file h263data.h.

Referenced by ff_h263_decode_init_vlc(), ff_h263_encode_motion(), ff_msmpeg4_decode_init(), h263_get_motion_length(), init_mv_penalty_and_fcode(), msmpeg4v2_encode_motion(), and svq1_decode_init().

RLTable ff_rl_intra_aic

Definition at line 231 of file h263data.h.

Referenced by ff_h263_decode_init_vlc(), ff_h263_encode_init(), h263_decode_block(), and h263_encode_block().