H.264 / AVC / MPEG4 part10 codec. More...

#include "libavutil/intreadwrite.h"
#include "cabac.h"
#include "error_resilience.h"
#include "get_bits.h"
#include "h264chroma.h"
#include "h264dsp.h"
#include "h264pred.h"
#include "h264qpel.h"
#include "internal.h"
#include "mpegutils.h"
#include "parser.h"
#include "qpeldsp.h"
#include "rectangle.h"
#include "videodsp.h"

Data Structures
struct	SPS
	Sequence parameter set. More...

struct	PPS
	Picture parameter set. More...

struct	FPA
	Frame Packing Arrangement Type. More...

struct	MMCO
	Memory management control operation. More...

struct	H264Picture

struct	H264Context
	H264Context. More...

Macros
#define	H264_MAX_PICTURE_COUNT 36

#define	H264_MAX_THREADS 32

#define	MAX_SPS_COUNT 32

#define	MAX_PPS_COUNT 256

#define	MAX_MMCO_COUNT 66

#define	MAX_DELAYED_PIC_COUNT 16

#define	MAX_MBPAIR_SIZE (256*1024)

#define	ALLOW_INTERLACE

#define	FMO 0

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

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

#define	MB_FIELD(h) (h)->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)->pps.cabac

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

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

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

#define	EXTENDED_SAR 255

#define	MB_TYPE_REF0 MB_TYPE_ACPRED

#define	MB_TYPE_8x8DCT 0x01000000

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

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

#define	QP_MAX_NUM (51 + 6*6)

#define	LIST_NOT_USED -1

#define	PART_NOT_AVAILABLE -2

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

#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.

#define	COPY_PICTURE(dst, src)

#define	LUMA_DC_BLOCK_INDEX 48

#define	CHROMA_DC_BLOCK_INDEX 49

#define	SLICE_SINGLETHREAD 1

#define	SLICE_SKIPED 2

Enumerations
enum	{ NAL_SLICE = 1, NAL_DPA = 2, NAL_DPB = 3, NAL_DPC = 4, NAL_IDR_SLICE = 5, NAL_SEI = 6, NAL_SPS = 7, NAL_PPS = 8, NAL_AUD = 9, NAL_END_SEQUENCE = 10, NAL_END_STREAM = 11, NAL_FILLER_DATA = 12, NAL_SPS_EXT = 13, NAL_AUXILIARY_SLICE = 19, NAL_FF_IGNORE = 0xff0f001 }

enum	SEI_Type { SEI_TYPE_BUFFERING_PERIOD = 0, SEI_TYPE_PIC_TIMING = 1, SEI_TYPE_USER_DATA_ITU_T_T35 = 4, SEI_TYPE_USER_DATA_UNREGISTERED = 5, SEI_TYPE_RECOVERY_POINT = 6, SEI_TYPE_FRAME_PACKING = 45, SEI_TYPE_DISPLAY_ORIENTATION = 47 }
	SEI message types. More...

enum	SEI_PicStructType { SEI_PIC_STRUCT_FRAME = 0, SEI_PIC_STRUCT_TOP_FIELD = 1, SEI_PIC_STRUCT_BOTTOM_FIELD = 2, SEI_PIC_STRUCT_TOP_BOTTOM = 3, SEI_PIC_STRUCT_BOTTOM_TOP = 4, SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, SEI_PIC_STRUCT_FRAME_DOUBLING = 7, SEI_PIC_STRUCT_FRAME_TRIPLING = 8 }
	pic_struct in picture timing SEI message More...

enum	SEI_FpaType { SEI_FPA_TYPE_CHECKERBOARD = 0, SEI_FPA_TYPE_INTERLEAVE_COLUMN = 1, SEI_FPA_TYPE_INTERLEAVE_ROW = 2, SEI_FPA_TYPE_SIDE_BY_SIDE = 3, SEI_FPA_TYPE_TOP_BOTTOM = 4, SEI_FPA_TYPE_INTERLEAVE_TEMPORAL = 5, SEI_FPA_TYPE_2D = 6 }
	frame_packing_arrangement types More...

enum	MMCOOpcode { MMCO_END = 0, MMCO_SHORT2UNUSED, MMCO_LONG2UNUSED, MMCO_SHORT2LONG, MMCO_SET_MAX_LONG, MMCO_RESET, MMCO_LONG }
	Memory management control operation opcode. More...

Functions
int	ff_h264_decode_sei (H264Context *h)
	Decode SEI.

int	ff_h264_decode_seq_parameter_set (H264Context *h)
	Decode SPS.

int	ff_h264_get_profile (SPS *sps)
	compute profile from sps

int	ff_h264_decode_picture_parameter_set (H264Context *h, int bit_length)
	Decode PPS.

const uint8_t *	ff_h264_decode_nal (H264Context h, const uint8_t src, int dst_length, int consumed, int length)
	Decode a network abstraction layer unit.

void	ff_h264_free_context (H264Context *h)
	Free any data that may have been allocated in the H264 context like SPS, PPS etc.

int	ff_h264_get_slice_type (const H264Context *h)
	Reconstruct bitstream slice_type.

int	ff_h264_alloc_tables (H264Context *h)
	Allocate tables.

int	ff_h264_fill_default_ref_list (H264Context *h)
	Fill the default_ref_list.

int	ff_h264_decode_ref_pic_list_reordering (H264Context *h)

void	ff_h264_fill_mbaff_ref_list (H264Context *h)

void	ff_h264_remove_all_refs (H264Context *h)

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)

int	ff_generate_sliding_window_mmcos (H264Context *h, int first_slice)

int	ff_h264_check_intra4x4_pred_mode (H264Context *h)
	Check if the top & left blocks are available if needed & change the dc mode so it only uses the available blocks.

int	ff_h264_check_intra_pred_mode (H264Context *h, int mode, int is_chroma)
	Check if the top & left blocks are available if needed & change the dc mode so it only uses the available blocks.

void	ff_h264_hl_decode_mb (H264Context *h)

int	ff_h264_decode_extradata (H264Context h, const uint8_t buf, int size)

int	ff_h264_decode_init (AVCodecContext *avctx)

void	ff_h264_decode_init_vlc (void)

int	ff_h264_decode_mb_cavlc (H264Context *h)
	Decode a macroblock.

int	ff_h264_decode_mb_cabac (H264Context *h)
	Decode a CABAC coded macroblock.

void	ff_h264_init_cabac_states (H264Context *h)

void	ff_h264_init_dequant_tables (H264Context *h)

void	ff_h264_direct_dist_scale_factor (H264Context *const h)

void	ff_h264_direct_ref_list_init (H264Context *const h)

void	ff_h264_pred_direct_motion (H264Context const h, int mb_type)

void	ff_h264_filter_mb_fast (H264Context h, 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 (H264Context h, 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_reset_sei (H264Context *h)
	Reset SEI values at the beginning of the frame.

const char *	ff_h264_sei_stereo_mode (H264Context *h)
	Get stereo_mode string from the h264 frame_packing_arrangement.

static av_always_inline uint32_t	pack16to32 (int a, int b)

static av_always_inline uint16_t	pack8to16 (int a, int b)

static av_always_inline int	get_chroma_qp (H264Context *h, int t, int qscale)
	Get the chroma qp.

static av_always_inline int	pred_intra_mode (H264Context *h, int n)
	Get the predicted intra4x4 prediction mode.

static av_always_inline void	write_back_intra_pred_mode (H264Context *h)

static av_always_inline void	write_back_non_zero_count (H264Context *h)

static av_always_inline void	write_back_motion_list (H264Context *h, int b_stride, int b_xy, int b8_xy, int mb_type, int list)

static av_always_inline void	write_back_motion (H264Context *h, int mb_type)

static av_always_inline int	get_dct8x8_allowed (H264Context *h)

static int	find_start_code (const uint8_t *buf, int buf_size, int buf_index, int next_avc)

static int	get_avc_nalsize (H264Context h, const uint8_t buf, int buf_size, int *buf_index)

int	ff_h264_field_end (H264Context *h, int in_setup)

int	ff_h264_ref_picture (H264Context h, H264Picture dst, H264Picture *src)

void	ff_h264_unref_picture (H264Context h, H264Picture pic)

int	ff_h264_context_init (H264Context *h)
	Init context Allocate buffers which are not shared amongst multiple threads.

int	ff_h264_set_parameter_from_sps (H264Context *h)

void	ff_h264_draw_horiz_band (H264Context *h, int y, int height)

int	ff_init_poc (H264Context h, int pic_field_poc[2], int pic_poc)

int	ff_pred_weight_table (H264Context *h)

int	ff_set_ref_count (H264Context *h)

int	ff_h264_decode_slice_header (H264Context h, H264Context h0)
	Decode a slice header.

int	ff_h264_execute_decode_slices (H264Context *h, unsigned context_count)
	Call decode_slice() for each context.

int	ff_h264_update_thread_context (AVCodecContext dst, const AVCodecContext src)

void	ff_h264_flush_change (H264Context *h)

void	ff_h264_free_tables (H264Context *h, int free_rbsp)

void	ff_h264_set_erpic (ERPicture dst, H264Picture src)

Variables
const uint8_t	ff_h264_chroma_qp [7][QP_MAX_NUM+1]
	One chroma qp table for each possible bit depth (8-14).

const uint16_t	ff_h264_mb_sizes [4]

static const uint8_t	scan8 [16 *3+3]

Detailed Description

H.264 / AVC / MPEG4 part10 codec.

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

Definition in file h264.h.

Macro Definition Documentation

#define H264_MAX_PICTURE_COUNT 36

Definition at line 46 of file h264.h.

Referenced by copy_picture_range(), ff_h264_alloc_tables(), ff_h264_decode_seq_parameter_set(), ff_h264_free_tables(), ff_h264_update_thread_context(), find_unused_picture(), flush_dpb(), and release_unused_pictures().

#define H264_MAX_THREADS 32

Definition at line 47 of file h264.h.

Referenced by ff_h264_free_tables(), and h264_slice_header_init().

#define MAX_SPS_COUNT 32

Definition at line 49 of file h264.h.

Referenced by active_parameter_sets(), decode_picture_timing(), ff_h264_decode_picture_parameter_set(), ff_h264_decode_seq_parameter_set(), ff_h264_free_context(), ff_h264_update_thread_context(), ff_hevc_decode_nal_pps(), ff_hevc_decode_nal_sps(), hvcc_write(), parse_nal_units(), and vdadec_init().

#define MAX_PPS_COUNT 256

Definition at line 50 of file h264.h.

Referenced by ff_h264_decode_picture_parameter_set(), ff_h264_decode_slice_header(), ff_h264_free_context(), ff_h264_update_thread_context(), ff_hevc_decode_nal_pps(), hls_slice_header(), hvcc_write(), and parse_nal_units().

#define MAX_MMCO_COUNT 66

Definition at line 52 of file h264.h.

Referenced by ff_generate_sliding_window_mmcos(), ff_h264_decode_ref_pic_marking(), and scan_mmco_reset().

#define MAX_DELAYED_PIC_COUNT 16

Definition at line 54 of file h264.h.

Referenced by decode_postinit(), ff_h264_decode_init(), ff_h264_execute_ref_pic_marking(), ff_h264_update_thread_context(), and idr().

#define MAX_MBPAIR_SIZE (256*1024)

Definition at line 56 of file h264.h.

Referenced by ff_h264_decode_nal().

#define ALLOW_INTERLACE

Definition at line 60 of file h264.h.

#define FMO 0

Definition at line 62 of file h264.h.

Referenced by ff_h264_alloc_tables(), fill_decode_neighbors(), and write_back_motion_list().

#define MAX_SLICES 32

The maximum number of slices supported by the decoder.

must be a power of 2

Definition at line 68 of file h264.h.

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

Definition at line 71 of file h264.h.

Referenced by await_references(), backup_mb_border(), ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), fill_filter_caches_inter(), and xchg_mb_border().

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

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

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

Definition at line 74 of file h264.h.

Referenced by await_references(), decode_cabac_mb_skip(), decode_finish_row(), ff_generate_sliding_window_mmcos(), ff_h264_decode_ref_pic_list_reordering(), ff_h264_decode_ref_pic_marking(), ff_h264_decode_slice_header(), ff_h264_direct_dist_scale_factor(), ff_h264_field_end(), ff_h264_fill_default_ref_list(), h264_filter_mb_fast_internal(), and pic_num_extract().

#define LEFT_MBS 2

Definition at line 75 of file h264.h.

Referenced by fill_decode_caches(), fill_decode_neighbors(), and fill_filter_caches().

#define LTOP 0

Definition at line 76 of file h264.h.

Referenced by decode_cabac_intra_mb_type(), decode_cabac_mb_chroma_pre_mode(), ff_h264_decode_mb_cabac(), ff_h264_filter_mb(), fill_decode_caches(), fill_decode_neighbors(), fill_filter_caches(), fill_filter_caches_inter(), filter_mb_dir(), h264_filter_mb_fast_internal(), and pred_pskip_motion().

#define LBOT 1

Definition at line 77 of file h264.h.

Referenced by fill_decode_caches(), fill_decode_neighbors(), and fill_filter_caches().

#define LEFT ( i ) (i)

Definition at line 78 of file h264.h.

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

Definition at line 91 of file h264.h.

Referenced by decode_postinit(), decode_slice(), ff_h264_decode_slice_header(), fill_slice_long(), and vaapi_h264_decode_slice().

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

Definition at line 94 of file h264.h.

Referenced by fill_decode_caches(), fill_filter_caches(), filter_mb_dir(), write_back_motion(), and write_back_motion_list().

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

Definition at line 97 of file h264.h.

Referenced by ff_h264_filter_mb(), and h264_filter_mb_fast_internal().

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

Definition at line 98 of file h264.h.

Referenced by backup_mb_border(), ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), ff_h264_filter_mb(), fill_decode_caches(), filter_mb_dir(), get_pixel_format(), h264_filter_mb_fast_internal(), hl_decode_mb(), and parse_nal_units().

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

Definition at line 99 of file h264.h.

Referenced by backup_mb_border(), decode_cabac_residual_nondc(), ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), ff_h264_filter_mb(), ff_h264_hl_decode_mb(), fill_decode_caches(), filter_mb_dir(), get_pixel_format(), h264_filter_mb_fast_internal(), loop_filter(), and parse_nal_units().

#define EXTENDED_SAR 255

Definition at line 101 of file h264.h.

Referenced by decode_vui_parameters().

#define MB_TYPE_REF0 MB_TYPE_ACPRED

Definition at line 103 of file h264.h.

#define MB_TYPE_8x8DCT 0x01000000

Definition at line 104 of file h264.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

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

Definition at line 105 of file h264.h.

Referenced by ff_h264_decode_mb_cavlc().

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

Definition at line 106 of file h264.h.

Referenced by decode_cabac_luma_residual(), decode_luma_residual(), ff_h264_decode_mb_cabac(), ff_h264_filter_mb(), fill_decode_caches(), fill_filter_caches(), filter_mb_dir(), h264_filter_mb_fast_internal(), hl_decode_mb_idct_luma(), and hl_decode_mb_predict_luma().

#define QP_MAX_NUM (51 + 6*6)

Definition at line 108 of file h264.h.

#define LIST_NOT_USED -1

Definition at line 415 of file h264.h.

Referenced by ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), fill_decode_caches(), fill_filter_caches_inter(), pred_pskip_motion(), and write_back_motion().

#define PART_NOT_AVAILABLE -2

Definition at line 416 of file h264.h.

Referenced by fetch_diagonal_mv(), ff_h264_context_init(), ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), fill_decode_caches(), pred_motion(), pred_pskip_motion(), pred_spatial_direct_motion(), svq3_decode_frame(), and svq3_decode_mb().

#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 727 of file h264.h.

Referenced by decode_nal_units().

#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 732 of file h264.h.

Referenced by decode_postinit(), and ff_h264_execute_ref_pic_marking().

#define COPY_PICTURE	(	dst,
		src
	)

Value:

do {\
    *(dst) = *(src);\
    (dst)->f.extended_data = (dst)->f.data;\
    (dst)->tf.f = &(dst)->f;\
} while (0)

Definition at line 895 of file h264.h.

Referenced by ff_h264_decode_ref_pic_list_reordering(), ff_h264_field_end(), ff_h264_fill_default_ref_list(), ff_h264_fill_mbaff_ref_list(), and split_field_copy().

#define LUMA_DC_BLOCK_INDEX 48

Definition at line 932 of file h264.h.

Referenced by decode_cabac_luma_residual(), decode_cabac_residual_internal(), decode_luma_residual(), decode_residual(), get_cabac_cbf_ctx(), and hl_decode_mb_predict_luma().

#define CHROMA_DC_BLOCK_INDEX 49

Definition at line 933 of file h264.h.

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

#define SLICE_SINGLETHREAD 1

Definition at line 1144 of file h264.h.

Referenced by decode_nal_units(), and ff_h264_decode_slice_header().

#define SLICE_SKIPED 2

Definition at line 1145 of file h264.h.

Referenced by decode_nal_units(), and ff_h264_decode_slice_header().

Enumeration Type Documentation

anonymous enum

Enumerator:

NAL_SLICE
NAL_DPA
NAL_DPB
NAL_DPC
NAL_IDR_SLICE
NAL_SEI
NAL_SPS
NAL_PPS
NAL_AUD
NAL_END_SEQUENCE
NAL_END_STREAM
NAL_FILLER_DATA
NAL_SPS_EXT
NAL_AUXILIARY_SLICE
NAL_FF_IGNORE

Definition at line 111 of file h264.h.

enum SEI_Type

SEI message types.

Enumerator:

SEI_TYPE_BUFFERING_PERIOD	buffering period (H.264, D.1.1)
SEI_TYPE_PIC_TIMING	picture timing
SEI_TYPE_USER_DATA_ITU_T_T35	user data registered by ITU-T Recommendation T.35
SEI_TYPE_USER_DATA_UNREGISTERED	unregistered user data
SEI_TYPE_RECOVERY_POINT	recovery point (frame # to decoder sync)
SEI_TYPE_FRAME_PACKING	frame packing arrangement
SEI_TYPE_DISPLAY_ORIENTATION	display orientation

Definition at line 132 of file h264.h.

enum SEI_PicStructType

pic_struct in picture timing SEI message

Enumerator:

SEI_PIC_STRUCT_FRAME	0: frame
SEI_PIC_STRUCT_TOP_FIELD	1: top field
SEI_PIC_STRUCT_BOTTOM_FIELD	2: bottom field
SEI_PIC_STRUCT_TOP_BOTTOM	3: top field, bottom field, in that order
SEI_PIC_STRUCT_BOTTOM_TOP	4: bottom field, top field, in that order
SEI_PIC_STRUCT_TOP_BOTTOM_TOP	5: top field, bottom field, top field repeated, in that order
SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM	6: bottom field, top field, bottom field repeated, in that order
SEI_PIC_STRUCT_FRAME_DOUBLING	7: frame doubling
SEI_PIC_STRUCT_FRAME_TRIPLING	8: frame tripling

Definition at line 145 of file h264.h.

enum SEI_FpaType

frame_packing_arrangement types

Enumerator:

SEI_FPA_TYPE_CHECKERBOARD
SEI_FPA_TYPE_INTERLEAVE_COLUMN
SEI_FPA_TYPE_INTERLEAVE_ROW
SEI_FPA_TYPE_SIDE_BY_SIDE
SEI_FPA_TYPE_TOP_BOTTOM
SEI_FPA_TYPE_INTERLEAVE_TEMPORAL
SEI_FPA_TYPE_2D

Definition at line 160 of file h264.h.

enum MMCOOpcode

Memory management control operation opcode.

Enumerator:

MMCO_END
MMCO_SHORT2UNUSED
MMCO_LONG2UNUSED
MMCO_SHORT2LONG
MMCO_SET_MAX_LONG
MMCO_RESET
MMCO_LONG

Definition at line 273 of file h264.h.

Function Documentation

int ff_h264_decode_sei ( H264Context * h )

Decode SEI.

Definition at line 282 of file h264_sei.c.

Referenced by decode_nal_units(), and parse_nal_units().

int ff_h264_decode_seq_parameter_set ( H264Context * h )

Decode SPS.

Definition at line 306 of file h264_ps.c.

Referenced by decode_nal_units(), and parse_nal_units().

int ff_h264_get_profile ( SPS * sps )

compute profile from sps

Parameters

sps SPS

Returns: profile as defined by FF_PROFILE_H264_*

Definition at line 1205 of file h264.c.

Referenced by ff_h264_decode_slice_header(), and parse_nal_units().

int ff_h264_decode_picture_parameter_set	(	H264Context *	h,
		int	bit_length
	)

Decode PPS.

Definition at line 585 of file h264_ps.c.

Referenced by decode_nal_units(), and parse_nal_units().

const uint8_t* ff_h264_decode_nal	(	H264Context *	h,
		const uint8_t *	src,
		int *	dst_length,
		int *	consumed,
		int	length
	)

Decode a network abstraction layer unit.

Parameters

consumed	is the number of bytes used as input
length	is the length of the array
dst_length	is the number of decoded bytes FIXME here or a decode rbsp tailing?

Returns: decoded bytes, might be src+1 if no escapes

Definition at line 233 of file h264.c.

Referenced by decode_nal_units(), get_last_needed_nal(), and parse_nal_units().

void ff_h264_free_context ( H264Context * h )

Free any data that may have been allocated in the H264 context like SPS, PPS etc.

Definition at line 1902 of file h264.c.

Referenced by ff_h264_decode_init(), h264_close(), h264_decode_end(), and svq3_decode_end().

int ff_h264_get_slice_type ( const H264Context * h )

Reconstruct bitstream slice_type.

Definition at line 2021 of file h264_slice.c.

Referenced by fill_slice_long(), and vaapi_h264_decode_slice().

int ff_h264_alloc_tables ( H264Context * h )

Allocate tables.

needs width/height

Definition at line 427 of file h264.c.

Referenced by ff_h264_update_thread_context(), h264_slice_header_init(), and svq3_decode_init().

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().

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().

void ff_h264_remove_all_refs ( H264Context * h )

Definition at line 480 of file h264_refs.c.

Referenced by h264_decode_end(), and idr().

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().

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_check_intra4x4_pred_mode ( H264Context * h )

Check if the top & left blocks are available if needed & change the dc mode so it only uses the available blocks.

Definition at line 145 of file h264.c.

Referenced by ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), and svq3_decode_mb().

int ff_h264_check_intra_pred_mode	(	H264Context *	h,
		int	mode,
		int	is_chroma
	)

Check if the top & left blocks are available if needed & change the dc mode so it only uses the available blocks.

Definition at line 192 of file h264.c.

Referenced by ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), and svq3_decode_mb().

void ff_h264_hl_decode_mb ( H264Context * h )

Definition at line 809 of file h264_mb.c.

Referenced by decode_slice(), h264_er_decode_mb(), and svq3_decode_frame().

int ff_h264_decode_extradata	(	H264Context *	h,
		const uint8_t *	buf,
		int	size
	)

Definition at line 566 of file h264.c.

Referenced by ff_h264_decode_init(), h264_decode_frame(), and h264_parse().

int ff_h264_decode_init ( AVCodecContext * avctx )

Definition at line 628 of file h264.c.

Referenced by svq3_decode_init().

void ff_h264_decode_init_vlc ( void )

Definition at line 326 of file h264_cavlc.c.

Referenced by ff_h264_decode_init().

int ff_h264_decode_mb_cavlc ( H264Context * h )

Decode a macroblock.

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

Definition at line 699 of file h264_cavlc.c.

Referenced by decode_slice().

int ff_h264_decode_mb_cabac ( H264Context * h )

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 1885 of file h264_cabac.c.

Referenced by decode_slice().

void ff_h264_init_cabac_states ( H264Context * h )

Definition at line 1264 of file h264_cabac.c.

Referenced by decode_slice().

void ff_h264_init_dequant_tables ( H264Context * h )

Definition at line 365 of file h264_slice.c.

Referenced by ff_h264_alloc_tables(), and ff_h264_decode_slice_header().

void ff_h264_direct_dist_scale_factor ( H264Context *const h )

Definition at line 50 of file h264_direct.c.

Referenced by ff_h264_decode_slice_header().

void ff_h264_direct_ref_list_init ( H264Context *const h )

Definition at line 107 of file h264_direct.c.

Referenced by ff_h264_decode_slice_header().

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

Definition at line 693 of file h264_direct.c.

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

void ff_h264_filter_mb_fast	(	H264Context *	h,
		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().

void ff_h264_filter_mb	(	H264Context *	h,
		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 704 of file h264_loopfilter.c.

Referenced by ff_h264_filter_mb_fast(), and loop_filter().

void ff_h264_reset_sei ( H264Context * h )

Reset SEI values at the beginning of the frame.

Parameters

h	H.264 context.

Definition at line 37 of file h264_sei.c.

Referenced by decode_nal_units(), ff_h264_decode_init(), ff_h264_flush_change(), and parse_nal_units().

const char* ff_h264_sei_stereo_mode ( H264Context * h )

Get stereo_mode string from the h264 frame_packing_arrangement.

Parameters

h	H.264 context.

Definition at line 359 of file h264_sei.c.

Referenced by output_frame().

static av_always_inline uint32_t pack16to32	(	int	a,
		int	b
	)

static

Definition at line 952 of file h264.h.

Referenced by ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), fill_filter_caches_inter(), h264_er_decode_mb(), pred_pskip_motion(), pred_spatial_direct_motion(), pred_temp_direct_motion(), and svq3_mc_dir().

static av_always_inline uint16_t pack8to16	(	int	a,
		int	b
	)

static

Definition at line 961 of file h264.h.

Referenced by ff_h264_decode_mb_cabac().

static av_always_inline int get_chroma_qp	(	H264Context *	h,
		int	t,
		int	qscale
	)

static

Get the chroma qp.

Definition at line 973 of file h264.h.

Referenced by ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), ff_h264_decode_slice_header(), ff_h264_filter_mb(), filter_mb_dir(), h264_filter_mb_fast_internal(), and loop_filter().

static av_always_inline int pred_intra_mode	(	H264Context *	h,
		int	n
	)

static

Get the predicted intra4x4 prediction mode.

Definition at line 981 of file h264.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

static av_always_inline void write_back_intra_pred_mode ( H264Context * h )

static

Definition at line 996 of file h264.h.

Referenced by ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), and svq3_decode_mb().

static av_always_inline void write_back_non_zero_count ( H264Context * h )

static

Definition at line 1007 of file h264.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

static av_always_inline void write_back_motion_list	(	H264Context *	h,
		int	b_stride,
		int	b_xy,
		int	b8_xy,
		int	mb_type,
		int	list
	)

static

Definition at line 1030 of file h264.h.

Referenced by write_back_motion().

static av_always_inline void write_back_motion	(	H264Context *	h,
		int	mb_type
	)

static

Definition at line 1065 of file h264.h.

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

static av_always_inline int get_dct8x8_allowed ( H264Context * h )

static

Definition at line 1090 of file h264.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

static int find_start_code	(	const uint8_t *	buf,
		int	buf_size,
		int	buf_index,
		int	next_avc
	)

inlinestatic

Definition at line 1102 of file h264.h.

Referenced by decode_nal_units(), get_last_needed_nal(), and parse_nal_units().

static int get_avc_nalsize	(	H264Context *	h,
		const uint8_t *	buf,
		int	buf_size,
		int *	buf_index
	)

inlinestatic

Definition at line 1112 of file h264.h.

Referenced by decode_nal_units(), get_last_needed_nal(), and parse_nal_units().

int ff_h264_field_end	(	H264Context *	h,
		int	in_setup
	)

Definition at line 155 of file h264_picture.c.

Referenced by ff_h264_decode_slice_header(), and h264_decode_frame().

int ff_h264_ref_picture	(	H264Context *	h,
		H264Picture *	dst,
		H264Picture *	src
	)

Definition at line 68 of file h264_picture.c.

Referenced by ff_h264_remove_all_refs(), ff_h264_update_thread_context(), and h264_frame_start().

void ff_h264_unref_picture	(	H264Context *	h,
		H264Picture *	pic
	)

Definition at line 47 of file h264_picture.c.

Referenced by alloc_picture(), ff_h264_flush_change(), ff_h264_free_tables(), ff_h264_ref_picture(), ff_h264_remove_all_refs(), ff_h264_update_thread_context(), find_unused_picture(), flush_dpb(), h264_decode_end(), h264_decode_frame(), h264_frame_start(), and release_unused_pictures().

int ff_h264_context_init ( H264Context * h )

Init context Allocate buffers which are not shared amongst multiple threads.

Definition at line 492 of file h264.c.

Referenced by ff_h264_update_thread_context(), and h264_slice_header_init().

int ff_h264_set_parameter_from_sps ( H264Context * h )

Definition at line 1225 of file h264.c.

Referenced by ff_h264_decode_slice_header(), and ff_h264_update_thread_context().

void ff_h264_draw_horiz_band	(	H264Context *	h,
		int	y,
		int	height
	)

Definition at line 97 of file h264.c.

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

int ff_init_poc	(	H264Context *	h,
		int	pic_field_poc[2],
		int *	pic_poc
	)

Definition at line 1120 of file h264.c.

Referenced by ff_h264_decode_slice_header(), and parse_nal_units().

int ff_pred_weight_table ( H264Context * h )

Definition at line 983 of file h264.c.

Referenced by ff_h264_decode_slice_header(), and scan_mmco_reset().

int ff_set_ref_count ( H264Context * h )

Definition at line 1272 of file h264.c.

Referenced by ff_h264_decode_slice_header(), and scan_mmco_reset().

int ff_h264_decode_slice_header	(	H264Context *	h,
		H264Context *	h0
	)

Decode a slice header.

This will (re)intialize the decoder and call h264_frame_start() as needed.

Parameters

h	h264context
h0	h264 master context (differs from 'h' when doing sliced based parallel decoding)

Returns: 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded

Definition at line 1280 of file h264_slice.c.

Referenced by decode_nal_units().

int ff_h264_execute_decode_slices	(	H264Context *	h,
		unsigned	context_count
	)

Call decode_slice() for each context.

Parameters

h	h264 master context
context_count	number of contexts to execute

Definition at line 2570 of file h264_slice.c.

Referenced by decode_nal_units().

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

Definition at line 457 of file h264_slice.c.

void ff_h264_flush_change ( H264Context * h )

Definition at line 1071 of file h264.c.

Referenced by ff_h264_decode_init(), ff_h264_decode_slice_header(), and flush_dpb().

void ff_h264_free_tables	(	H264Context *	h,
		int	free_rbsp
	)

Definition at line 365 of file h264.c.

Referenced by ff_h264_alloc_tables(), ff_h264_free_context(), flush_dpb(), and h264_slice_header_init().

void ff_h264_set_erpic	(	ERPicture *	dst,
		H264Picture *	src
	)

Definition at line 132 of file h264_picture.c.

Referenced by ff_h264_field_end(), and h264_frame_start().

Variable Documentation

const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM+1]

One chroma qp table for each possible bit depth (8-14).

Definition at line 53 of file h264_ps.c.

Referenced by build_qp_table(), and hl_decode_mb().

const uint16_t ff_h264_mb_sizes[4]

Definition at line 54 of file h264.c.

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

const uint8_t scan8[16 *3+3]

static

Initial value:

= {
+  1 * 8, 5 +  1 * 8, 4 +  2 * 8, 5 +  2 * 8,
+  1 * 8, 7 +  1 * 8, 6 +  2 * 8, 7 +  2 * 8,
+  3 * 8, 5 +  3 * 8, 4 +  4 * 8, 5 +  4 * 8,
+  3 * 8, 7 +  3 * 8, 6 +  4 * 8, 7 +  4 * 8,
+  6 * 8, 5 +  6 * 8, 4 +  7 * 8, 5 +  7 * 8,
+  6 * 8, 7 +  6 * 8, 6 +  7 * 8, 7 +  7 * 8,
+  8 * 8, 5 +  8 * 8, 4 +  9 * 8, 5 +  9 * 8,
+  8 * 8, 7 +  8 * 8, 6 +  9 * 8, 7 +  9 * 8,
+ 11 * 8, 5 + 11 * 8, 4 + 12 * 8, 5 + 12 * 8,
+ 11 * 8, 7 + 11 * 8, 6 + 12 * 8, 7 + 12 * 8,
+ 13 * 8, 5 + 13 * 8, 4 + 14 * 8, 5 + 14 * 8,
+ 13 * 8, 7 + 13 * 8, 6 + 14 * 8, 7 + 14 * 8,
+  0 * 8, 0 +  5 * 8, 0 + 10 * 8
}

Definition at line 936 of file h264.h.

Referenced by decode_cabac_luma_residual(), decode_cabac_mb_ref(), decode_cabac_residual_dc(), decode_cabac_residual_dc_422(), decode_cabac_residual_internal(), decode_cabac_residual_nondc(), decode_luma_residual(), decode_residual(), decode_slice(), fetch_diagonal_mv(), ff_h264_check_intra4x4_pred_mode(), ff_h264_context_init(), ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), ff_h264_idct8_add4(), ff_h264_idct_add16(), ff_h264_idct_add16intra(), ff_h264_idct_add8(), ff_h264_idct_add8_422(), fill_decode_caches(), fill_filter_caches(), fill_filter_caches_inter(), filter_mb_dir(), get_cabac_cbf_ctx(), get_lowest_part_list_y(), get_lowest_part_y(), h264_er_decode_mb(), h264_frame_start(), hl_decode_mb(), hl_decode_mb_444(), hl_decode_mb_idct_luma(), hl_decode_mb_predict_luma(), mc_dir_part(), mc_part(), mc_part_std(), mc_part_weighted(), pred_16x8_motion(), pred_8x16_motion(), pred_intra_mode(), pred_motion(), pred_non_zero_count(), pred_pskip_motion(), pred_spatial_direct_motion(), pred_temp_direct_motion(), prefetch_motion(), svq3_decode_frame(), svq3_decode_mb(), svq3_mc_dir(), and write_back_motion_list().

Data Structures

Macros

Enumerations

Functions

Variables

Detailed Description

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation