libavcodec/mpegvideo_common.h File Reference

The simplest mpeg encoder (well, it was the simplest!). More...

#include <string.h>
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "mjpegenc.h"
#include "msmpeg4.h"
#include "faandct.h"
#include <limits.h>

Go to the source code of this file.

Defines
#define	OBMC_FILTER(x, t, l, m, r, b)   dst[x]= (t*top[x] + l*left[x] + m*mid[x] + r*right[x] + b*bottom[x] + 4)>>3
#define	OBMC_FILTER4(x, t, l, m, r, b)
#define	MID   0
Functions
int	dct_quantize_c (MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow)
int	alloc_picture (MpegEncContext *s, Picture *pic, int shared)
	allocates a Picture The pixels are allocated/set by calling get_buffer() if shared=0
void	MPV_common_defaults (MpegEncContext *s)
	sets the given MpegEncContext to common defaults (same for encoding and decoding).
static void	gmc1_motion (MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture)
static void	gmc_motion (MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture)
static int	hpel_motion (MpegEncContext *s, uint8_t *dest, uint8_t *src, int field_based, int field_select, int src_x, int src_y, int width, int height, int stride, int h_edge_pos, int v_edge_pos, int w, int h, op_pixels_func *pix_op, int motion_x, int motion_y)
static av_always_inline void	mpeg_motion_internal (MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int field_based, int bottom_field, int field_select, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], int motion_x, int motion_y, int h, int is_mpeg12, int mb_y)
static av_always_inline void	mpeg_motion (MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int field_based, int bottom_field, int field_select, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], int motion_x, int motion_y, int h, int mb_y)
static void	put_obmc (uint8_t *dst, uint8_t *src[5], int stride)
static void	obmc_motion (MpegEncContext *s, uint8_t *dest, uint8_t *src, int src_x, int src_y, op_pixels_func *pix_op, int16_t mv[5][2])
static void	qpel_motion (MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int field_based, int bottom_field, int field_select, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], qpel_mc_func(*qpix_op)[16], int motion_x, int motion_y, int h)
static void	chroma_4mv_motion (MpegEncContext *s, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture, op_pixels_func *pix_op, int mx, int my)
	h263 chroma 4mv motion compensation.
static void	prefetch_motion (MpegEncContext *s, uint8_t **pix, int dir)
static av_always_inline void	MPV_motion_internal (MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int dir, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], qpel_mc_func(*qpix_op)[16], int is_mpeg12)
	motion compensation of a single macroblock
static void	MPV_motion (MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int dir, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], qpel_mc_func(*qpix_op)[16])

---

Detailed Description

The simplest mpeg encoder (well, it was the simplest!).

Definition in file mpegvideo_common.h.

---

Define Documentation

#define MID   0

Referenced by obmc_motion().

#define OBMC_FILTER	(	x,
		t,
		l,
		m,
		r,
		b		)	dst[x]= (t*top[x] + l*left[x] + m*mid[x] + r*right[x] + b*bottom[x] + 4)>>3

Referenced by put_obmc().

#define OBMC_FILTER4	(	x,
		t,
		l,
		m,
		r,
		b		)

Value:

OBMC_FILTER(x         , t, l, m, r, b);\
    OBMC_FILTER(x+1       , t, l, m, r, b);\
    OBMC_FILTER(x  +stride, t, l, m, r, b);\
    OBMC_FILTER(x+1+stride, t, l, m, r, b);

Referenced by put_obmc().

---

Function Documentation

int alloc_picture	(	MpegEncContext *	s,
		Picture *	pic,
		int	shared
	)

allocates a Picture The pixels are allocated/set by calling get_buffer() if shared=0

static void chroma_4mv_motion	(	MpegEncContext *	s,
		uint8_t *	dest_cb,
		uint8_t *	dest_cr,
		uint8_t **	ref_picture,
		op_pixels_func *	pix_op,
		int	mx,
		int	my
	)			[inline, static]

h263 chroma 4mv motion compensation.

Definition at line 562 of file mpegvideo_common.h.

Referenced by MPV_motion_internal().

int dct_quantize_c	(	MpegEncContext *	s,
		DCTELEM *	block,
		int	n,
		int	qscale,
		int *	overflow
	)

Definition at line 3693 of file mpegvideo_enc.c.

static void gmc1_motion	(	MpegEncContext *	s,
		uint8_t *	dest_y,
		uint8_t *	dest_cb,
		uint8_t *	dest_cr,
		uint8_t **	ref_picture
	)			[inline, static]

Definition at line 56 of file mpegvideo_common.h.

Referenced by MPV_motion_internal().

static void gmc_motion	(	MpegEncContext *	s,
		uint8_t *	dest_y,
		uint8_t *	dest_cb,
		uint8_t *	dest_cr,
		uint8_t **	ref_picture
	)			[inline, static]

Definition at line 142 of file mpegvideo_common.h.

Referenced by MPV_motion_internal().

static int hpel_motion	(	MpegEncContext *	s,
		uint8_t *	dest,
		uint8_t *	src,
		int	field_based,
		int	field_select,
		int	src_x,
		int	src_y,
		int	width,
		int	height,
		int	stride,
		int	h_edge_pos,
		int	v_edge_pos,
		int	w,
		int	h,
		op_pixels_func *	pix_op,
		int	motion_x,
		int	motion_y
	)			[inline, static]

Definition at line 198 of file mpegvideo_common.h.

Referenced by MPV_motion_internal(), and obmc_motion().

static av_always_inline void mpeg_motion	(	MpegEncContext *	s,
		uint8_t *	dest_y,
		uint8_t *	dest_cb,
		uint8_t *	dest_cr,
		int	field_based,
		int	bottom_field,
		int	field_select,
		uint8_t **	ref_picture,
		op_pixels_func(*)	pix_op[4],
		int	motion_x,
		int	motion_y,
		int	h,
		int	mb_y
	)			[static]

Definition at line 367 of file mpegvideo_common.h.

Referenced by MPV_motion_internal().

static av_always_inline void mpeg_motion_internal	(	MpegEncContext *	s,
		uint8_t *	dest_y,
		uint8_t *	dest_cb,
		uint8_t *	dest_cr,
		int	field_based,
		int	bottom_field,
		int	field_select,
		uint8_t **	ref_picture,
		op_pixels_func(*)	pix_op[4],
		int	motion_x,
		int	motion_y,
		int	h,
		int	is_mpeg12,
		int	mb_y
	)			[static]

Definition at line 239 of file mpegvideo_common.h.

Referenced by mpeg_motion().

void MPV_common_defaults

(

MpegEncContext *

s

)

sets the given MpegEncContext to common defaults (same for encoding and decoding).

the changed fields will not depend upon the prior state of the MpegEncContext.

Definition at line 542 of file mpegvideo.c.

Referenced by MPV_decode_defaults(), and MPV_encode_defaults().

static void MPV_motion	(	MpegEncContext *	s,
		uint8_t *	dest_y,
		uint8_t *	dest_cb,
		uint8_t *	dest_cr,
		int	dir,
		uint8_t **	ref_picture,
		op_pixels_func(*)	pix_op[4],
		qpel_mc_func(*)	qpix_op[16]
	)			[inline, static]

Definition at line 884 of file mpegvideo_common.h.

Referenced by encode_mb_internal(), and MPV_decode_mb_internal().

static av_always_inline void MPV_motion_internal	(	MpegEncContext *	s,
		uint8_t *	dest_y,
		uint8_t *	dest_cb,
		uint8_t *	dest_cr,
		int	dir,
		uint8_t **	ref_picture,
		op_pixels_func(*)	pix_op[4],
		qpel_mc_func(*)	qpix_op[16],
		int	is_mpeg12
	)			[static]

motion compensation of a single macroblock

Parameters:

	s	context
	dest_y	luma destination pointer
	dest_cb	chroma cb/u destination pointer
	dest_cr	chroma cr/v destination pointer
	dir	direction (0->forward, 1->backward)
	ref_picture	array[3] of pointers to the 3 planes of the reference picture
	pix_op	halfpel motion compensation function (average or put normally)
	qpix_op	qpel motion compensation function (average or put normally) the motion vectors are taken from s->mv and the MV type from s->mv_type

Definition at line 636 of file mpegvideo_common.h.

Referenced by MPV_motion().

static void obmc_motion	(	MpegEncContext *	s,
		uint8_t *	dest,
		uint8_t *	src,
		int	src_x,
		int	src_y,
		op_pixels_func *	pix_op,
		int16_t	mv[5][2]
	)			[inline, static]

Definition at line 438 of file mpegvideo_common.h.

Referenced by MPV_motion_internal().

static void prefetch_motion	(	MpegEncContext *	s,
		uint8_t **	pix,
		int	dir
	)			[inline, static]

Definition at line 612 of file mpegvideo_common.h.

static void put_obmc	(	uint8_t *	dst,
		uint8_t *	src[5],
		int	stride
	)			[inline, static]

Definition at line 386 of file mpegvideo_common.h.

Referenced by obmc_motion().

static void qpel_motion	(	MpegEncContext *	s,
		uint8_t *	dest_y,
		uint8_t *	dest_cb,
		uint8_t *	dest_cr,
		int	field_based,
		int	bottom_field,
		int	field_select,
		uint8_t **	ref_picture,
		op_pixels_func(*)	pix_op[4],
		qpel_mc_func(*)	qpix_op[16],
		int	motion_x,
		int	motion_y,
		int	h
	)			[inline, static]

Definition at line 467 of file mpegvideo_common.h.

Referenced by MPV_motion_internal().