#include "libavutil/buffer.h"
#include "libavutil/mem_internal.h"
#include "cabac.h"
#include "error_resilience.h"
#include "h264_parse.h"
#include "h264_ps.h"
#include "h264_sei.h"
#include "h2645_parse.h"
#include "h264chroma.h"
#include "h264dsp.h"
#include "h264pred.h"
#include "h264qpel.h"
#include "h274.h"
#include "mpegutils.h"
#include "threadframe.h"
#include "videodsp.h"

Data Structures
struct	MMCO
	Memory management control operation. More...

struct	H264Picture

struct	H264Ref

struct	H264SliceContext

struct	H264Context
	H264Context. More...

Macros
#define	H264_MAX_PICTURE_COUNT 36

#define	ALLOW_INTERLACE

#define	FMO 0

#define	MAX_SLICES 32
	The maximum number of slices supported by the decoder. More...

#define	MB_MBAFF(h) (h)->mb_mbaff

#define	MB_FIELD(sl) (sl)->mb_field_decoding_flag

#define	FRAME_MBAFF(h) (h)->mb_aff_frame

#define	FIELD_PICTURE(h) ((h)->picture_structure != PICT_FRAME)

#define	LEFT_MBS 2

#define	LTOP 0

#define	LBOT 1

#define	LEFT(i) (i)

#define	FIELD_OR_MBAFF_PICTURE(h) (FRAME_MBAFF(h) \|\| FIELD_PICTURE(h))

#define	CABAC(h) (h)->ps.pps->cabac

#define	CHROMA(h) ((h)->ps.sps->chroma_format_idc)

#define	CHROMA422(h) ((h)->ps.sps->chroma_format_idc == 2)

#define	CHROMA444(h) ((h)->ps.sps->chroma_format_idc == 3)

#define	IS_REF0(a) ((a) & MB_TYPE_REF0)

#define	IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT)

#define	IS_SUB_8X8(a) ((a) & MB_TYPE_16x16)

#define	IS_SUB_8X4(a) ((a) & MB_TYPE_16x8)

#define	IS_SUB_4X8(a) ((a) & MB_TYPE_8x16)

#define	IS_SUB_4X4(a) ((a) & MB_TYPE_8x8)

#define	IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0 << ((part) + 2 * (list))))

#define	USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0 \| MB_TYPE_P1L0) << (2 * (list))))

#define	DELAYED_PIC_REF (1 << 2)
	H264Picture.reference has this flag set, when the picture is held for delayed output. More...

#define	LIST_NOT_USED -1

#define	FRAME_RECOVERED_IDR (1 << 0)
	We have seen an IDR, so all the following frames in coded order are correctly decodable. More...

#define	FRAME_RECOVERED_SEI (1 << 1)
	Sufficient number of frames have been decoded since a SEI recovery point, so all the following frames in presentation order are correct. More...

#define	FRAME_RECOVERED_HEURISTIC (1 << 2)
	Recovery point detected by heuristic. More...

#define	LUMA_DC_BLOCK_INDEX 48

#define	CHROMA_DC_BLOCK_INDEX 49

Functions
int	ff_h264_get_slice_type (const H264SliceContext *sl)
	Reconstruct bitstream slice_type. More...

int	ff_h264_alloc_tables (H264Context *h)
	Allocate tables. More...

int	ff_h264_decode_ref_pic_list_reordering (H264SliceContext sl, void logctx)

int	ff_h264_build_ref_list (H264Context h, H264SliceContext sl)

void	ff_h264_remove_all_refs (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)

void	ff_h264_hl_decode_mb (const H264Context h, H264SliceContext sl)

void	ff_h264_decode_init_vlc (void)

int	ff_h264_decode_mb_cavlc (const H264Context h, H264SliceContext sl)
	Decode a macroblock. More...

int	ff_h264_decode_mb_cabac (const H264Context h, H264SliceContext sl)
	Decode a CABAC coded macroblock. More...

void	ff_h264_init_cabac_states (const H264Context h, H264SliceContext sl)

void	ff_h264_direct_dist_scale_factor (const H264Context const h, H264SliceContext sl)

void	ff_h264_direct_ref_list_init (const H264Context const h, H264SliceContext sl)

void	ff_h264_pred_direct_motion (const H264Context const h, H264SliceContext sl, int *mb_type)

void	ff_h264_filter_mb_fast (const H264Context h, H264SliceContext sl, int mb_x, int mb_y, uint8_t img_y, uint8_t img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize)

void	ff_h264_filter_mb (const H264Context h, H264SliceContext sl, int mb_x, int mb_y, uint8_t img_y, uint8_t img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize)

static av_always_inline int	get_chroma_qp (const PPS *pps, int t, int qscale)
	Get the chroma qp. More...

int	ff_h264_field_end (H264Context h, H264SliceContext sl, int in_setup)

int	ff_h264_ref_picture (H264Picture dst, const H264Picture src)

int	ff_h264_replace_picture (H264Picture dst, const H264Picture src)

void	ff_h264_unref_picture (H264Picture *pic)

void	ff_h264_slice_context_init (H264Context h, H264SliceContext sl)
	Init slice context. More...

void	ff_h264_draw_horiz_band (const H264Context h, H264SliceContext sl, int y, int height)

int	ff_h264_queue_decode_slice (H264Context h, const H2645NAL nal)
	Submit a slice for decoding. More...

int	ff_h264_execute_decode_slices (H264Context *h)
	Call decode_slice() for each context. More...

int	ff_h264_update_thread_context (AVCodecContext dst, const AVCodecContext src)

int	ff_h264_update_thread_context_for_user (AVCodecContext dst, const AVCodecContext src)

void	ff_h264_flush_change (H264Context *h)

void	ff_h264_free_tables (H264Context *h)

void	ff_h264_set_erpic (ERPicture dst, const H264Picture src)

Variables
const uint16_t	ff_h264_mb_sizes [4]

Detailed Description

H.264 / AVC / MPEG-4 part10 codec.

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

Definition in file h264dec.h.

Macro Definition Documentation

◆ H264_MAX_PICTURE_COUNT

#define H264_MAX_PICTURE_COUNT 36

Definition at line 49 of file h264dec.h.

◆ ALLOW_INTERLACE

#define ALLOW_INTERLACE

Definition at line 53 of file h264dec.h.

◆ FMO

#define FMO 0

Definition at line 55 of file h264dec.h.

◆ MAX_SLICES

#define MAX_SLICES 32

The maximum number of slices supported by the decoder.

must be a power of 2

Definition at line 61 of file h264dec.h.

◆ MB_MBAFF

#define MB_MBAFF ( h ) (h)->mb_mbaff

Definition at line 64 of file h264dec.h.

◆ MB_FIELD

#define MB_FIELD ( sl ) (sl)->mb_field_decoding_flag

Definition at line 65 of file h264dec.h.

◆ FRAME_MBAFF

#define FRAME_MBAFF ( h ) (h)->mb_aff_frame

Definition at line 66 of file h264dec.h.

◆ FIELD_PICTURE

#define FIELD_PICTURE ( h ) ((h)->picture_structure != PICT_FRAME)

Definition at line 67 of file h264dec.h.

◆ LEFT_MBS

#define LEFT_MBS 2

Definition at line 68 of file h264dec.h.

◆ LTOP

#define LTOP 0

Definition at line 69 of file h264dec.h.

◆ LBOT

#define LBOT 1

Definition at line 70 of file h264dec.h.

◆ LEFT

#define LEFT ( i ) (i)

Definition at line 71 of file h264dec.h.

◆ FIELD_OR_MBAFF_PICTURE

#define FIELD_OR_MBAFF_PICTURE ( h ) (FRAME_MBAFF(h) || FIELD_PICTURE(h))

Definition at line 84 of file h264dec.h.

◆ CABAC

#define CABAC ( h ) (h)->ps.pps->cabac

Definition at line 87 of file h264dec.h.

◆ CHROMA

#define CHROMA ( h ) ((h)->ps.sps->chroma_format_idc)

Definition at line 90 of file h264dec.h.

◆ CHROMA422

#define CHROMA422 ( h ) ((h)->ps.sps->chroma_format_idc == 2)

Definition at line 91 of file h264dec.h.

◆ CHROMA444

#define CHROMA444 ( h ) ((h)->ps.sps->chroma_format_idc == 3)

Definition at line 92 of file h264dec.h.

◆ IS_REF0

#define IS_REF0 ( a ) ((a) & MB_TYPE_REF0)

Definition at line 94 of file h264dec.h.

◆ IS_8x8DCT

#define IS_8x8DCT ( a ) ((a) & MB_TYPE_8x8DCT)

Definition at line 95 of file h264dec.h.

◆ IS_SUB_8X8

#define IS_SUB_8X8 ( a ) ((a) & MB_TYPE_16x16)

Definition at line 96 of file h264dec.h.

◆ IS_SUB_8X4

#define IS_SUB_8X4 ( a ) ((a) & MB_TYPE_16x8)

Definition at line 97 of file h264dec.h.

◆ IS_SUB_4X8

#define IS_SUB_4X8 ( a ) ((a) & MB_TYPE_8x16)

Definition at line 98 of file h264dec.h.

◆ IS_SUB_4X4

#define IS_SUB_4X4 ( a ) ((a) & MB_TYPE_8x8)

Definition at line 99 of file h264dec.h.

◆ IS_DIR

#define IS_DIR	(	a,
		part,
		list
	)	((a) & (MB_TYPE_P0L0 << ((part) + 2 * (list))))

Definition at line 100 of file h264dec.h.

◆ USES_LIST

#define USES_LIST	(	a,
		list
	)	((a) & ((MB_TYPE_P0L0 \| MB_TYPE_P1L0) << (2 * (list))))

Definition at line 103 of file h264dec.h.

◆ DELAYED_PIC_REF

#define DELAYED_PIC_REF (1 << 2)

H264Picture.reference has this flag set, when the picture is held for delayed output.

Definition at line 151 of file h264dec.h.

◆ LIST_NOT_USED

#define LIST_NOT_USED -1

Definition at line 398 of file h264dec.h.

◆ FRAME_RECOVERED_IDR

#define FRAME_RECOVERED_IDR (1 << 0)

We have seen an IDR, so all the following frames in coded order are correctly decodable.

Definition at line 525 of file h264dec.h.

◆ FRAME_RECOVERED_SEI

#define FRAME_RECOVERED_SEI (1 << 1)

Sufficient number of frames have been decoded since a SEI recovery point, so all the following frames in presentation order are correct.

Definition at line 530 of file h264dec.h.

◆ FRAME_RECOVERED_HEURISTIC

#define FRAME_RECOVERED_HEURISTIC (1 << 2)

Recovery point detected by heuristic.

Definition at line 534 of file h264dec.h.

◆ LUMA_DC_BLOCK_INDEX

#define LUMA_DC_BLOCK_INDEX 48

Definition at line 669 of file h264dec.h.

◆ CHROMA_DC_BLOCK_INDEX

#define CHROMA_DC_BLOCK_INDEX 49

Definition at line 670 of file h264dec.h.

Function Documentation

◆ ff_h264_get_slice_type()

int ff_h264_get_slice_type ( const H264SliceContext * sl )

Reconstruct bitstream slice_type.

Definition at line 2180 of file h264_slice.c.

Referenced by fill_slice_long(), and vaapi_h264_decode_slice().

◆ ff_h264_alloc_tables()

int ff_h264_alloc_tables ( H264Context * h )

Allocate tables.

needs width/height

Definition at line 188 of file h264dec.c.

Referenced by h264_slice_header_init().

◆ ff_h264_decode_ref_pic_list_reordering()

int ff_h264_decode_ref_pic_list_reordering	(	H264SliceContext *	sl,
		void *	logctx
	)

Definition at line 427 of file h264_refs.c.

Referenced by h264_slice_header_parse().

◆ ff_h264_build_ref_list()

int ff_h264_build_ref_list	(	H264Context *	h,
		H264SliceContext *	sl
	)

Definition at line 294 of file h264_refs.c.

Referenced by h264_slice_init().

◆ ff_h264_remove_all_refs()

void ff_h264_remove_all_refs ( H264Context * h )

Definition at line 564 of file h264_refs.c.

Referenced by h264_decode_end(), and idr().

◆ 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 606 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 828 of file h264_refs.c.

Referenced by h264_slice_header_parse().

◆ ff_h264_hl_decode_mb()

void ff_h264_hl_decode_mb	(	const H264Context *	h,
		H264SliceContext *	sl
	)

Definition at line 800 of file h264_mb.c.

Referenced by decode_slice(), and h264_er_decode_mb().

◆ ff_h264_decode_init_vlc()

void ff_h264_decode_init_vlc ( void )

Definition at line 315 of file h264_cavlc.c.

Referenced by h264_decode_init().

◆ ff_h264_decode_mb_cavlc()

int ff_h264_decode_mb_cavlc	(	const H264Context *	h,
		H264SliceContext *	sl
	)

Decode a macroblock.

Returns: 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error

Definition at line 665 of file h264_cavlc.c.

Referenced by decode_slice().

◆ ff_h264_decode_mb_cabac()

int ff_h264_decode_mb_cabac	(	const H264Context *	h,
		H264SliceContext *	sl
	)

Decode a CABAC coded macroblock.

Returns: 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error

Decode a CABAC coded macroblock.

Returns: 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR if an error is noticed

Definition at line 1920 of file h264_cabac.c.

Referenced by decode_slice().

◆ ff_h264_init_cabac_states()

void ff_h264_init_cabac_states	(	const H264Context *	h,
		H264SliceContext *	sl
	)

Definition at line 1262 of file h264_cabac.c.

Referenced by decode_slice().

◆ ff_h264_direct_dist_scale_factor()

void ff_h264_direct_dist_scale_factor	(	const H264Context *const	h,
		H264SliceContext *	sl
	)

Definition at line 61 of file h264_direct.c.

Referenced by h264_slice_init().

◆ ff_h264_direct_ref_list_init()

void ff_h264_direct_ref_list_init	(	const H264Context *const	h,
		H264SliceContext *	sl
	)

Definition at line 120 of file h264_direct.c.

Referenced by h264_slice_init().

◆ ff_h264_pred_direct_motion()

void ff_h264_pred_direct_motion	(	const H264Context *const	h,
		H264SliceContext *	sl,
		int *	mb_type
	)

Definition at line 720 of file h264_direct.c.

Referenced by decode_mb_skip(), ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

◆ ff_h264_filter_mb_fast()

void ff_h264_filter_mb_fast	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	mb_x,
		int	mb_y,
		uint8_t *	img_y,
		uint8_t *	img_cb,
		uint8_t *	img_cr,
		unsigned int	linesize,
		unsigned int	uvlinesize
	)

Definition at line 416 of file h264_loopfilter.c.

Referenced by loop_filter().

◆ ff_h264_filter_mb()

void ff_h264_filter_mb	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	mb_x,
		int	mb_y,
		uint8_t *	img_y,
		uint8_t *	img_cb,
		uint8_t *	img_cr,
		unsigned int	linesize,
		unsigned int	uvlinesize
	)

Definition at line 716 of file h264_loopfilter.c.

Referenced by ff_h264_filter_mb_fast(), and loop_filter().

◆ get_chroma_qp()

static av_always_inline int get_chroma_qp	(	const PPS *	pps,
		int	t,
		int	qscale
	)

static

Get the chroma qp.

Definition at line 675 of file h264dec.h.

Referenced by ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), ff_h264_filter_mb(), filter_mb_dir(), h264_filter_mb_fast_internal(), h264_slice_header_parse(), and loop_filter().

◆ ff_h264_field_end()

int ff_h264_field_end	(	H264Context *	h,
		H264SliceContext *	sl,
		int	in_setup
	)

Definition at line 190 of file h264_picture.c.

Referenced by ff_h264_queue_decode_slice(), and h264_decode_frame().

◆ ff_h264_ref_picture()

int ff_h264_ref_picture	(	H264Picture *	dst,
		const H264Picture *	src
	)

Definition at line 109 of file h264_picture.c.

Referenced by ff_h264_remove_all_refs(), and h264_frame_start().

◆ ff_h264_replace_picture()

int ff_h264_replace_picture	(	H264Picture *	dst,
		const H264Picture *	src
	)

Definition at line 136 of file h264_picture.c.

Referenced by ff_h264_update_thread_context().

◆ ff_h264_unref_picture()

void ff_h264_unref_picture ( H264Picture * pic )

Definition at line 40 of file h264_picture.c.

Referenced by alloc_picture(), ff_h264_flush_change(), ff_h264_ref_picture(), ff_h264_remove_all_refs(), ff_h264_replace_picture(), h264_decode_flush(), h264_decode_frame(), h264_frame_start(), h264_free_pic(), and release_unused_pictures().

◆ ff_h264_slice_context_init()

void ff_h264_slice_context_init	(	H264Context *	h,
		H264SliceContext *	sl
	)

Init slice context.

Definition at line 267 of file h264dec.c.

Referenced by h264_slice_header_init().

◆ ff_h264_draw_horiz_band()

void ff_h264_draw_horiz_band	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	y,
		int	height
	)

Definition at line 103 of file h264dec.c.

Referenced by d3d12va_h264_end_frame(), decode_finish_row(), dxva2_h264_end_frame(), vaapi_h264_end_frame(), and vdpau_h264_end_frame().

◆ ff_h264_queue_decode_slice()

int ff_h264_queue_decode_slice	(	H264Context *	h,
		const H2645NAL *	nal
	)

Submit a slice for decoding.

Parse the slice header, starting a new field/frame if necessary. If any slices are queued for the previous field, they are decoded.

Definition at line 2055 of file h264_slice.c.

Referenced by decode_nal_units().

◆ ff_h264_execute_decode_slices()

int ff_h264_execute_decode_slices ( H264Context * h )

Call decode_slice() for each context.

Parameters

h	h264 master context

Definition at line 2762 of file h264_slice.c.

Referenced by decode_nal_units(), and ff_h264_queue_decode_slice().

◆ ff_h264_update_thread_context()

int ff_h264_update_thread_context	(	AVCodecContext *	dst,
		const AVCodecContext *	src
	)

Definition at line 330 of file h264_slice.c.

◆ ff_h264_update_thread_context_for_user()

int ff_h264_update_thread_context_for_user	(	AVCodecContext *	dst,
		const AVCodecContext *	src
	)

Definition at line 465 of file h264_slice.c.

◆ ff_h264_flush_change()

void ff_h264_flush_change ( H264Context * h )

Definition at line 460 of file h264dec.c.

Referenced by h264_decode_flush(), h264_decode_init(), and h264_init_ps().

◆ ff_h264_free_tables()

void ff_h264_free_tables ( H264Context * h )

Definition at line 141 of file h264dec.c.

Referenced by h264_decode_end(), h264_decode_flush(), and h264_slice_header_init().

◆ ff_h264_set_erpic()

void ff_h264_set_erpic	(	ERPicture *	dst,
		const H264Picture *	src
	)

Definition at line 167 of file h264_picture.c.

Referenced by decode_nal_units(), and h264_frame_start().

Variable Documentation

◆ ff_h264_mb_sizes

const uint16_t ff_h264_mb_sizes[4]

Definition at line 59 of file h264dec.c.

Referenced by ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), and hl_decode_mb().

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ H264_MAX_PICTURE_COUNT

◆ ALLOW_INTERLACE

◆ FMO

◆ MAX_SLICES

◆ MB_MBAFF

◆ MB_FIELD

◆ FRAME_MBAFF

◆ FIELD_PICTURE

◆ LEFT_MBS

◆ LTOP

◆ LBOT

◆ LEFT

◆ FIELD_OR_MBAFF_PICTURE

◆ CABAC

◆ CHROMA

◆ CHROMA422

◆ CHROMA444

◆ IS_REF0

◆ IS_8x8DCT

◆ IS_SUB_8X8

◆ IS_SUB_8X4

◆ IS_SUB_4X8

◆ IS_SUB_4X4

◆ IS_DIR

◆ USES_LIST

◆ DELAYED_PIC_REF

◆ LIST_NOT_USED

◆ FRAME_RECOVERED_IDR

◆ FRAME_RECOVERED_SEI

◆ FRAME_RECOVERED_HEURISTIC

◆ LUMA_DC_BLOCK_INDEX

◆ CHROMA_DC_BLOCK_INDEX

Function Documentation

◆ ff_h264_get_slice_type()

◆ ff_h264_alloc_tables()

◆ ff_h264_decode_ref_pic_list_reordering()

◆ ff_h264_build_ref_list()

◆ ff_h264_remove_all_refs()

◆ ff_h264_execute_ref_pic_marking()

◆ ff_h264_decode_ref_pic_marking()

◆ ff_h264_hl_decode_mb()

◆ ff_h264_decode_init_vlc()

◆ ff_h264_decode_mb_cavlc()

◆ ff_h264_decode_mb_cabac()

◆ ff_h264_init_cabac_states()

◆ ff_h264_direct_dist_scale_factor()

◆ ff_h264_direct_ref_list_init()

◆ ff_h264_pred_direct_motion()

◆ ff_h264_filter_mb_fast()

◆ ff_h264_filter_mb()

◆ get_chroma_qp()

◆ ff_h264_field_end()

◆ ff_h264_ref_picture()

◆ ff_h264_replace_picture()

◆ ff_h264_unref_picture()

◆ ff_h264_slice_context_init()

◆ ff_h264_draw_horiz_band()

◆ ff_h264_queue_decode_slice()

◆ ff_h264_execute_decode_slices()

◆ ff_h264_update_thread_context()

◆ ff_h264_update_thread_context_for_user()

◆ ff_h264_flush_change()

◆ ff_h264_free_tables()

◆ ff_h264_set_erpic()

Variable Documentation

◆ ff_h264_mb_sizes