H.264 / AVC / MPEG4 part10 reference picture handling. More...

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

Functions
static void	pic_as_field (H264Picture *pic, const int parity)

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

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

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

int	ff_h264_fill_default_ref_list (H264Context *h)
	Fill the default_ref_list.

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

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

static int	pic_num_extract (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).

int	ff_h264_decode_ref_pic_list_reordering (H264Context *h)

void	ff_h264_fill_mbaff_ref_list (H264Context *h)

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

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

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.

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.

void	ff_h264_remove_all_refs (H264Context *h)

static int	check_opcodes (MMCO mmco1, MMCO mmco2, int n_mmcos)

int	ff_generate_sliding_window_mmcos (H264Context *h, int first_slice)

int	ff_h264_execute_ref_pic_marking (H264Context h, MMCO mmco, int mmco_count)
	Execute the reference picture marking (memory management control operations).

int	ff_h264_decode_ref_pic_marking (H264Context h, GetBitContext gb, int first_slice)

Detailed Description

H.264 / AVC / MPEG4 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

static void pic_as_field	(	H264Picture *	pic,
		const int	parity
	)

static

Definition at line 40 of file h264_refs.c.

Referenced by ff_h264_decode_ref_pic_list_reordering(), and split_field_copy().

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

static

Definition at line 51 of file h264_refs.c.

Referenced by build_def_list().

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

static

Definition at line 67 of file h264_refs.c.

Referenced by ff_h264_fill_default_ref_list().

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

static

Definition at line 93 of file h264_refs.c.

Referenced by ff_h264_fill_default_ref_list().

int ff_h264_fill_default_ref_list ( H264Context * h )

Fill the default_ref_list.

Definition at line 115 of file h264_refs.c.

Referenced by ff_h264_decode_slice_header().

static void print_short_term ( H264Context * h )

static

print short term list

Definition at line 507 of file h264_refs.c.

Referenced by ff_h264_decode_ref_pic_list_reordering(), and ff_h264_execute_ref_pic_marking().

static void print_long_term ( H264Context * h )

static

print long term list

Definition at line 523 of file h264_refs.c.

Referenced by ff_h264_decode_ref_pic_list_reordering(), and ff_h264_execute_ref_pic_marking().

static int pic_num_extract	(	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 200 of file h264_refs.c.

Referenced by ff_h264_decode_ref_pic_list_reordering(), and ff_h264_execute_ref_pic_marking().

int ff_h264_decode_ref_pic_list_reordering ( H264Context * h )

Definition at line 213 of file h264_refs.c.

Referenced by ff_h264_decode_slice_header().

void ff_h264_fill_mbaff_ref_list ( H264Context * h )

Definition at line 344 of file h264_refs.c.

Referenced by ff_h264_decode_slice_header().

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 383 of file h264_refs.c.

Referenced by ff_h264_remove_all_refs(), remove_long(), and remove_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 406 of file h264_refs.c.

Referenced by ff_h264_execute_ref_pic_marking(), and remove_short().

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 428 of file h264_refs.c.

Referenced by ff_h264_execute_ref_pic_marking(), and 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 441 of file h264_refs.c.

Referenced by ff_h264_execute_ref_pic_marking().

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 463 of file h264_refs.c.

Referenced by ff_h264_execute_ref_pic_marking(), and ff_h264_remove_all_refs().

void ff_h264_remove_all_refs ( H264Context * h )

Definition at line 480 of file h264_refs.c.

Referenced by h264_decode_end(), and idr().

static int check_opcodes	(	MMCO *	mmco1,
		MMCO *	mmco2,
		int	n_mmcos
	)

static

Definition at line 538 of file h264_refs.c.

Referenced by ff_generate_sliding_window_mmcos(), and ff_h264_decode_ref_pic_marking().

int ff_generate_sliding_window_mmcos	(	H264Context *	h,
		int	first_slice
	)

Definition at line 553 of file h264_refs.c.

Referenced by ff_h264_decode_ref_pic_marking(), and ff_h264_decode_slice_header().

int ff_h264_execute_ref_pic_marking	(	H264Context *	h,
		MMCO *	mmco,
		int	mmco_count
	)

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

Definition at line 585 of file h264_refs.c.

Referenced by ff_h264_decode_slice_header(), ff_h264_field_end(), and ff_h264_update_thread_context().

int ff_h264_decode_ref_pic_marking	(	H264Context *	h,
		GetBitContext *	gb,
		int	first_slice
	)

Definition at line 786 of file h264_refs.c.

Referenced by ff_h264_decode_slice_header().

Functions

Detailed Description

Function Documentation