H.264 / AVC / MPEG-4 part10 reference picture handling. More...

#include <inttypes.h>
#include "libavutil/avassert.h"
#include "internal.h"
#include "avcodec.h"
#include "h264.h"
#include "h264dec.h"
#include "golomb.h"
#include "mpegutils.h"
#include <assert.h>

Functions
static void	pic_as_field (H264Ref *pic, const int parity)

static void	ref_from_h264pic (H264Ref dst, H264Picture src)

static int	split_field_copy (H264Ref dest, H264Picture src, int parity, int id_add)

static int	build_def_list (H264Ref def, int def_len, H264Picture const *in, int len, int is_long, int sel)

static int	add_sorted (H264Picture *sorted, H264Picture const *src, int len, int limit, int dir)

static int	mismatches_ref (const H264Context h, const H264Picture pic)

static void	h264_initialise_ref_list (H264Context h, H264SliceContext sl)

static void	print_short_term (const H264Context *h)
	print short term list More...

static void	print_long_term (const H264Context *h)
	print long term list More...

static int	pic_num_extract (const H264Context h, int pic_num, int structure)
	Extract structure information about the picture described by pic_num in the current decoding context (frame or field). More...

static void	h264_fill_mbaff_ref_list (H264SliceContext *sl)

int	ff_h264_build_ref_list (H264Context h, H264SliceContext sl)

int	ff_h264_decode_ref_pic_list_reordering (H264SliceContext sl, void logctx)

static int	unreference_pic (H264Context h, H264Picture pic, int refmask)
	Mark a picture as no longer needed for reference. More...

static H264Picture *	find_short (H264Context h, int frame_num, int idx)
	Find a H264Picture in the short term reference list by frame number. More...

static void	remove_short_at_index (H264Context *h, int i)
	Remove a picture from the short term reference list by its index in that list. More...

static H264Picture *	remove_short (H264Context *h, int frame_num, int ref_mask)

static H264Picture *	remove_long (H264Context *h, int i, int ref_mask)
	Remove a picture from the long term reference list by its index in that list. More...

void	ff_h264_remove_all_refs (H264Context *h)

static void	generate_sliding_window_mmcos (H264Context *h)

int	ff_h264_execute_ref_pic_marking (H264Context *h)
	Execute the reference picture marking (memory management control operations). More...

int	ff_h264_decode_ref_pic_marking (H264SliceContext sl, GetBitContext gb, const H2645NAL nal, void logctx)

Detailed Description

H.264 / AVC / MPEG-4 part10 reference picture handling.

Author: Michael Niedermayer micha.nosp@m.elni.nosp@m.@gmx..nosp@m.at

Definition in file h264_refs.c.

Function Documentation

◆ pic_as_field()

static void pic_as_field	(	H264Ref *	pic,
		const int	parity
	)

static

Definition at line 40 of file h264_refs.c.

Referenced by ff_h264_build_ref_list(), and split_field_copy().

◆ ref_from_h264pic()

static void ref_from_h264pic	(	H264Ref *	dst,
		H264Picture *	src
	)

static

Definition at line 52 of file h264_refs.c.

Referenced by ff_h264_build_ref_list(), and split_field_copy().

◆ split_field_copy()

static int split_field_copy	(	H264Ref *	dest,
		H264Picture *	src,
		int	parity,
		int	id_add
	)

static

Definition at line 62 of file h264_refs.c.

Referenced by build_def_list().

◆ build_def_list()

static int build_def_list	(	H264Ref *	def,
		int	def_len,
		H264Picture const	in,
		int	len,
		int	is_long,
		int	sel
	)

static

Definition at line 78 of file h264_refs.c.

Referenced by h264_initialise_ref_list().

◆ add_sorted()

static int add_sorted	(	H264Picture **	sorted,
		H264Picture const	src,
		int	len,
		int	limit,
		int	dir
	)

static

Definition at line 104 of file h264_refs.c.

Referenced by h264_initialise_ref_list().

◆ mismatches_ref()

static int mismatches_ref	(	const H264Context *	h,
		const H264Picture *	pic
	)

static

Definition at line 127 of file h264_refs.c.

Referenced by h264_initialise_ref_list().

◆ h264_initialise_ref_list()

static void h264_initialise_ref_list	(	H264Context *	h,
		H264SliceContext *	sl
	)

static

Definition at line 135 of file h264_refs.c.

Referenced by ff_h264_build_ref_list().

◆ print_short_term()

static void print_short_term ( const H264Context * h )

static

print short term list

Definition at line 220 of file h264_refs.c.

Referenced by ff_h264_build_ref_list(), and ff_h264_execute_ref_pic_marking().

◆ print_long_term()

static void print_long_term ( const H264Context * h )

static

print long term list

Definition at line 236 of file h264_refs.c.

Referenced by ff_h264_build_ref_list(), and ff_h264_execute_ref_pic_marking().

◆ pic_num_extract()

static int pic_num_extract	(	const H264Context *	h,
		int	pic_num,
		int *	structure
	)

static

Extract structure information about the picture described by pic_num in the current decoding context (frame or field).

Note that pic_num is picture number without wrapping (so, 0<=pic_num<max_pic_num).

Parameters

pic_num	picture number for which to extract structure information
structure	one of PICT_XXX describing structure of picture with pic_num

Returns: frame number (short term) or long term index of picture described by pic_num

Definition at line 261 of file h264_refs.c.

Referenced by ff_h264_build_ref_list(), and ff_h264_execute_ref_pic_marking().

◆ h264_fill_mbaff_ref_list()

static void h264_fill_mbaff_ref_list ( H264SliceContext * sl )

static

Definition at line 274 of file h264_refs.c.

Referenced by ff_h264_build_ref_list().

◆ ff_h264_build_ref_list()

int ff_h264_build_ref_list	(	H264Context *	h,
		H264SliceContext *	sl
	)

Definition at line 299 of file h264_refs.c.

Referenced by h264_slice_init().

◆ ff_h264_decode_ref_pic_list_reordering()

int ff_h264_decode_ref_pic_list_reordering	(	H264SliceContext *	sl,
		void *	logctx
	)

Definition at line 421 of file h264_refs.c.

Referenced by h264_slice_header_parse().

◆ unreference_pic()

static int unreference_pic	(	H264Context *	h,
		H264Picture *	pic,
		int	refmask
	)

inlinestatic

Mark a picture as no longer needed for reference.

The refmask argument allows unreferencing of individual fields or the whole frame. If the picture becomes entirely unreferenced, but is being held for display purposes, it is marked as such.

Parameters

refmask mask of fields to unreference; the mask is bitwise anded with the reference marking of pic

Returns: non-zero if pic becomes entirely unreferenced (except possibly for display purposes) zero if one of the fields remains in reference

Definition at line 467 of file h264_refs.c.

Referenced by ff_h264_remove_all_refs(), remove_long(), and remove_short().

◆ find_short()

static H264Picture* find_short	(	H264Context *	h,
		int	frame_num,
		int *	idx
	)

static

Find a H264Picture in the short term reference list by frame number.

Parameters

frame_num	frame number to search for
idx	the index into h->short_ref where returned picture is found undefined if no picture found.

Returns: pointer to the found picture, or NULL if no pic with the provided frame number is found

Definition at line 490 of file h264_refs.c.

Referenced by ff_h264_execute_ref_pic_marking(), and remove_short().

◆ remove_short_at_index()

static void remove_short_at_index	(	H264Context *	h,
		int	i
	)

static

Remove a picture from the short term reference list by its index in that list.

This does no checking on the provided index; it is assumed to be valid. Other list entries are shifted down.

Parameters

i	index into h->short_ref of picture to remove.

Definition at line 512 of file h264_refs.c.

Referenced by ff_h264_execute_ref_pic_marking(), and remove_short().

◆ remove_short()

static H264Picture* remove_short	(	H264Context *	h,
		int	frame_num,
		int	ref_mask
	)

static

Returns: the removed picture or NULL if an error occurs

Definition at line 524 of file h264_refs.c.

Referenced by ff_h264_execute_ref_pic_marking().

◆ remove_long()

static H264Picture* remove_long	(	H264Context *	h,
		int	i,
		int	ref_mask
	)

static

Remove a picture from the long term reference list by its index in that list.

Returns: the removed picture or NULL if an error occurs

Definition at line 546 of file h264_refs.c.

Referenced by ff_h264_execute_ref_pic_marking(), and ff_h264_remove_all_refs().

◆ ff_h264_remove_all_refs()

void ff_h264_remove_all_refs ( H264Context * h )

Definition at line 563 of file h264_refs.c.

Referenced by h264_decode_end(), and idr().

◆ generate_sliding_window_mmcos()

static void generate_sliding_window_mmcos ( H264Context * h )

static

Definition at line 586 of file h264_refs.c.

Referenced by ff_h264_execute_ref_pic_marking().

◆ ff_h264_execute_ref_pic_marking()

int ff_h264_execute_ref_pic_marking ( H264Context * h )

Execute the reference picture marking (memory management control operations).

Definition at line 608 of file h264_refs.c.

Referenced by ff_h264_field_end(), ff_h264_update_thread_context(), and h264_field_start().

◆ ff_h264_decode_ref_pic_marking()

int ff_h264_decode_ref_pic_marking	(	H264SliceContext *	sl,
		GetBitContext *	gb,
		const H2645NAL *	nal,
		void *	logctx
	)

Definition at line 830 of file h264_refs.c.

Referenced by h264_slice_header_parse().

Functions

Detailed Description

Function Documentation

◆ pic_as_field()

◆ ref_from_h264pic()

◆ split_field_copy()

◆ build_def_list()

◆ add_sorted()

◆ mismatches_ref()

◆ h264_initialise_ref_list()

◆ print_short_term()

◆ print_long_term()

◆ pic_num_extract()

◆ h264_fill_mbaff_ref_list()

◆ ff_h264_build_ref_list()

◆ ff_h264_decode_ref_pic_list_reordering()

◆ unreference_pic()

◆ find_short()

◆ remove_short_at_index()

◆ remove_short()

◆ remove_long()

◆ ff_h264_remove_all_refs()

◆ generate_sliding_window_mmcos()

◆ ff_h264_execute_ref_pic_marking()

◆ ff_h264_decode_ref_pic_marking()