error_resilience.c File Reference

Error resilience / concealment. More...

#include <limits.h>
#include "libavutil/avassert.h"
#include "libavutil/attributes.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "error_resilience.h"
#include "mathops.h"
#include "me_cmp.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "threadframe.h"
#include "threadprogress.h"

Go to the source code of this file.

Macros
#define	MV_FROZEN   8
#define	MV_CHANGED   4
#define	MV_UNCHANGED   2
#define	MV_LISTED   1

Functions
av_cold int	ff_er_init (ERContext *const s)
static void	set_mv_strides (ERContext *s, ptrdiff_t *mv_step, ptrdiff_t *stride)
static void	put_dc (ERContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y)
	Replace the current MB with a flat dc-only version.
static void	filter181 (int16_t *data, int width, int height, ptrdiff_t stride)
static void	guess_dc (ERContext *s, int16_t *dc, int w, int h, ptrdiff_t stride, int is_luma)
	guess the dc of blocks which do not have an undamaged dc
static void	h_block_filter (ERContext *s, uint8_t *dst, int w, int h, ptrdiff_t stride, int is_luma)
	simple horizontal deblocking filter used for error resilience
static void	v_block_filter (ERContext *s, uint8_t *dst, int w, int h, ptrdiff_t stride, int is_luma)
	simple vertical deblocking filter used for error resilience
static av_always_inline void	add_blocklist (int(*blocklist)[2], int *blocklist_length, uint8_t *fixed, int mb_x, int mb_y, int mb_xy)
static void	guess_mv (ERContext *s)
static int	is_intra_more_likely (ERContext *s)
void	ff_er_frame_start (ERContext *s)
static int	er_supported (ERContext *s)
void	ff_er_add_slice (ERContext *s, int startx, int starty, int endx, int endy, int status)
	Add a slice.
void	ff_er_frame_end (ERContext *s, int *decode_error_flags)
	Indicate that a frame has finished decoding and perform error concealment in case it has been enabled and is necessary and supported.

Detailed Description

Error resilience / concealment.

Definition in file error_resilience.c.

Macro Definition Documentation

MV_FROZEN

#define MV_FROZEN   8

Definition at line 397 of file error_resilience.c.

Referenced by guess_mv().

MV_CHANGED

#define MV_CHANGED   4

Definition at line 398 of file error_resilience.c.

Referenced by guess_mv().

MV_UNCHANGED

#define MV_UNCHANGED   2

Definition at line 399 of file error_resilience.c.

Referenced by guess_mv().

MV_LISTED

#define MV_LISTED   1

Definition at line 400 of file error_resilience.c.

Referenced by add_blocklist().

Function Documentation

ff_er_init()

av_cold int ff_er_init

(

ERContext *const

s

)

Definition at line 42 of file error_resilience.c.

Referenced by ff_h264_alloc_tables(), and ff_mpeg_er_init().

set_mv_strides()

static void set_mv_strides ( ERContext * s, ptrdiff_t * mv_step, ptrdiff_t * stride )

static

Parameters

stride	the number of MVs to get to the next row
mv_step	the number of MVs per row or column in a macroblock

Definition at line 64 of file error_resilience.c.

Referenced by guess_mv(), h_block_filter(), and v_block_filter().

put_dc()

static void put_dc ( ERContext * s, uint8_t * dest_y, uint8_t * dest_cb, uint8_t * dest_cr, int mb_x, int mb_y )

static

Replace the current MB with a flat dc-only version.

Definition at line 79 of file error_resilience.c.

Referenced by ff_er_frame_end().

filter181()

static void filter181 ( int16_t * data, int width, int height, ptrdiff_t stride )

static

Definition at line 117 of file error_resilience.c.

Referenced by ff_er_frame_end().

guess_dc()

static void guess_dc ( ERContext * s, int16_t * dc, int w, int h, ptrdiff_t stride, int is_luma )

static

guess the dc of blocks which do not have an undamaged dc

Parameters

w	width in 8 pixel blocks
h	height in 8 pixel blocks

Definition at line 158 of file error_resilience.c.

Referenced by ff_er_frame_end().

h_block_filter()

static void h_block_filter ( ERContext * s, uint8_t * dst, int w, int h, ptrdiff_t stride, int is_luma )

static

simple horizontal deblocking filter used for error resilience

Parameters

w	width in 8 pixel blocks
h	height in 8 pixel blocks

Definition at line 261 of file error_resilience.c.

Referenced by ff_er_frame_end().

v_block_filter()

static void v_block_filter ( ERContext * s, uint8_t * dst, int w, int h, ptrdiff_t stride, int is_luma )

static

simple vertical deblocking filter used for error resilience

Parameters

w	width in 8 pixel blocks
h	height in 8 pixel blocks

Definition at line 330 of file error_resilience.c.

Referenced by ff_er_frame_end().

add_blocklist()

static av_always_inline void add_blocklist ( int(*) blocklist[2], int * blocklist_length, uint8_t * fixed, int mb_x, int mb_y, int mb_xy )

static

Definition at line 401 of file error_resilience.c.

Referenced by guess_mv().

guess_mv()

static void guess_mv ( ERContext * s )

static

Definition at line 410 of file error_resilience.c.

Referenced by ff_er_frame_end().

is_intra_more_likely()

static int is_intra_more_likely ( ERContext * s )

static

Definition at line 743 of file error_resilience.c.

Referenced by ff_er_frame_end().

ff_er_frame_start()

void ff_er_frame_start

(

ERContext *

s

)

Definition at line 812 of file error_resilience.c.

Referenced by ff_mpeg_er_frame_start(), and h264_frame_start().

er_supported()

static int er_supported ( ERContext * s )

static

Definition at line 823 of file error_resilience.c.

Referenced by ff_er_add_slice(), and ff_er_frame_end().

ff_er_add_slice()

void ff_er_add_slice	(	ERContext *	s,
		int	startx,
		int	starty,
		int	endx,
		int	endy,
		int	status )

Add a slice.

Parameters

endx	x component of the last macroblock, can be -1 for the last of the previous line
status	the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is assumed that no earlier end or error of the same type occurred

Definition at line 840 of file error_resilience.c.

Referenced by decode_chunks(), decode_slice(), er_add_slice(), ff_mpeg4_decode_partitions(), ff_vc1_decode_blocks(), ff_wmv2_decode_secondary_picture_header(), rv10_decode_packet(), rv34_decode_slice(), slice_decode_thread(), vc1_decode_b_blocks(), vc1_decode_i_blocks(), vc1_decode_i_blocks_adv(), vc1_decode_p_blocks(), and vc1_decode_skip_blocks().

ff_er_frame_end()

void ff_er_frame_end	(	ERContext *	s,
		int *	decode_error_flags )

Indicate that a frame has finished decoding and perform error concealment in case it has been enabled and is necessary and supported.

Parameters

s	ERContext in use
decode_error_flags	pointer where updated decode_error_flags are written if supplied; if not, the new flags are directly applied to the AVFrame whose errors are concealed

Definition at line 910 of file error_resilience.c.

Referenced by decode_nal_units(), decode_wmv9(), ff_h263_decode_frame(), ff_rv34_decode_frame(), finish_frame(), rv10_decode_frame(), rv10_decode_packet(), slice_end(), and vc1_decode_frame().