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

#include "config_components.h"
#include "libavutil/avassert.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavutil/timecode.h"
#include "decode.h"
#include "cabac.h"
#include "cabac_functions.h"
#include "error_resilience.h"
#include "avcodec.h"
#include "h264.h"
#include "h264dec.h"
#include "h264data.h"
#include "h264chroma.h"
#include "h264_ps.h"
#include "golomb.h"
#include "mathops.h"
#include "mpegutils.h"
#include "rectangle.h"
#include "libavutil/refstruct.h"
#include "thread.h"
#include "threadframe.h"

Macros
#define	IN_RANGE(a, b, size)

#define	REBASE_PICTURE(pic, new_ctx, old_ctx)

#define	TRANSPOSE(x)

#define	TRANSPOSE(x)

#define	HWACCEL_MAX

Functions
static void	release_unused_pictures (H264Context *h, int remove_current)

static int	alloc_scratch_buffers (H264SliceContext *sl, int linesize)

static int	init_table_pools (H264Context *h)

static int	alloc_picture (H264Context h, H264Picture pic)

static int	find_unused_picture (const H264Context *h)

static void	copy_picture_range (H264Picture *to, H264Picture const from, int count, H264Context new_base, const H264Context *old_base)

static void	color_frame (AVFrame *frame, const int c[4])

static int	h264_slice_header_init (H264Context *h)

int	ff_h264_update_thread_context (AVCodecContext dst, const AVCodecContext src)

int	ff_h264_update_thread_context_for_user (AVCodecContext dst, const AVCodecContext src)

static int	h264_frame_start (H264Context *h)

static av_always_inline void	backup_mb_border (const H264Context h, H264SliceContext sl, const uint8_t src_y, const uint8_t src_cb, const uint8_t *src_cr, int linesize, int uvlinesize, int simple)

static void	implicit_weight_table (const H264Context h, H264SliceContext sl, int field)
	Initialize implicit_weight table.

static void	init_scan_tables (H264Context *h)
	initialize scan tables

static enum AVPixelFormat	get_pixel_format (H264Context *h, int force_callback, int data_partitioning)

static void	init_dimensions (H264Context *h)

static enum AVPixelFormat	non_j_pixfmt (enum AVPixelFormat a)

static int	h264_init_ps (H264Context h, const H264SliceContext sl, int first_slice)

static int	h264_export_frame_props (H264Context *h)

static int	h264_select_output_frame (H264Context *h)

static int	h264_field_start (H264Context h, const H264SliceContext sl, const H2645NAL *nal, int first_slice)

static int	h264_slice_header_parse (const H264Context h, H264SliceContext sl, const H2645NAL *nal)

static int	h264_slice_init (H264Context h, H264SliceContext sl, const H2645NAL *nal)

static int	h264_parse_slice_id (const H264Context h, H264SliceContext sl)

int	ff_h264_attach_slice_partition (const H264Context h, H264SliceContext sl, const H2645NAL *nal)
	Attach a slice data partition B or C to the slice started by partition A.

int	ff_h264_queue_decode_slice (H264Context h, const H2645NAL nal, H264SliceContext **queued)
	Submit a slice for decoding.

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

static av_always_inline void	fill_filter_caches_inter (const H264Context h, H264SliceContext sl, int mb_type, int top_xy, const int left_xy[LEFT_MBS], int top_type, const int left_type[LEFT_MBS], int mb_xy, int list)

static int	fill_filter_caches (const H264Context h, H264SliceContext sl, int mb_type)

static void	loop_filter (const H264Context h, H264SliceContext sl, int start_x, int end_x)

static void	predict_field_decoding_flag (const H264Context h, H264SliceContext sl)

static void	decode_finish_row (const H264Context h, H264SliceContext sl)
	Draw edges and report progress for the last MB row.

static void	er_add_slice (H264SliceContext *sl, int startx, int starty, int endx, int endy, int status)

static int	decode_slice (struct AVCodecContext avctx, void arg)

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

Variables
static const uint8_t	field_scan [16+1]

static const uint8_t	field_scan8x8 [64+1]

static const uint8_t	field_scan8x8_cavlc [64+1]

static const uint8_t	zigzag_scan8x8_cavlc [64+1]

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 h264_slice.c.

Macro Definition Documentation

◆ IN_RANGE

#define IN_RANGE	(	a,
		b,
		size )

Value:

(((void*)(a) >= (void*)(b)) && ((void*)(a) < (void*)((b) + (size))))

a

int a

Definition h264pred_template.c:416

b

#define b

Definition input.c:43

size

int size

Definition twinvq_data.h:10344

Definition at line 287 of file h264_slice.c.

Referenced by copy_picture_range().

◆ REBASE_PICTURE

#define REBASE_PICTURE	(	pic,
		new_ctx,
		old_ctx )

Value:

    (((pic) && (pic) >= (old_ctx)->DPB &&                       \
      (pic) < (old_ctx)->DPB + H264_MAX_PICTURE_COUNT) ?          \
     &(new_ctx)->DPB[(pic) - (old_ctx)->DPB] : NULL)

Definition at line 289 of file h264_slice.c.

Referenced by copy_picture_range(), and ff_h264_update_thread_context().

◆ TRANSPOSE [1/2]

#define TRANSPOSE ( x )

Value:

((x) >> 2) | (((x) << 2) & 0xF)

Referenced by init_scan_tables().

◆ TRANSPOSE [2/2]

#define TRANSPOSE ( x )

Value:

((x) >> 3) | (((x) & 7) << 3)

◆ HWACCEL_MAX

#define HWACCEL_MAX

Value:

                     (CONFIG_H264_DXVA2_HWACCEL + \
                     (CONFIG_H264_D3D11VA_HWACCEL * 2) + \
                     CONFIG_H264_D3D12VA_HWACCEL + \
                     CONFIG_H264_NVDEC_HWACCEL + \
                     CONFIG_H264_NVDEC_CUARRAY_HWACCEL + \
                     CONFIG_H264_VAAPI_HWACCEL + \
                     CONFIG_H264_VIDEOTOOLBOX_HWACCEL + \
                     CONFIG_H264_VDPAU_HWACCEL + \
                     CONFIG_H264_VULKAN_HWACCEL)

Function Documentation

◆ release_unused_pictures()

static void release_unused_pictures	(	H264Context *	h,
		int	remove_current )

static

Definition at line 117 of file h264_slice.c.

Referenced by h264_field_start(), and h264_frame_start().

◆ alloc_scratch_buffers()

static int alloc_scratch_buffers	(	H264SliceContext *	sl,
		int	linesize )

static

Definition at line 130 of file h264_slice.c.

Referenced by decode_slice().

◆ init_table_pools()

static int init_table_pools ( H264Context * h )

static

Definition at line 162 of file h264_slice.c.

Referenced by alloc_picture().

◆ alloc_picture()

static int alloc_picture	(	H264Context *	h,
		H264Picture *	pic )

static

Definition at line 188 of file h264_slice.c.

Referenced by h264_frame_start().

◆ find_unused_picture()

static int find_unused_picture ( const H264Context * h )

static

Definition at line 275 of file h264_slice.c.

Referenced by h264_frame_start().

◆ copy_picture_range()

static void copy_picture_range	(	H264Picture **	to,
		H264Picture const	from,
		int	count,
		H264Context *	new_base,
		const H264Context *	old_base )

static

Definition at line 294 of file h264_slice.c.

Referenced by ff_h264_update_thread_context().

◆ color_frame()

static void color_frame	(	AVFrame *	frame,
		const int	c[4] )

static

Definition at line 307 of file h264_slice.c.

Referenced by h264_field_start().

◆ h264_slice_header_init()

static int h264_slice_header_init ( H264Context * h )

static

Definition at line 981 of file h264_slice.c.

Referenced by ff_h264_update_thread_context(), and h264_init_ps().

◆ ff_h264_update_thread_context()

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

Definition at line 339 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 472 of file h264_slice.c.

◆ h264_frame_start()

static int h264_frame_start ( H264Context * h )

static

Definition at line 484 of file h264_slice.c.

Referenced by h264_field_start().

◆ backup_mb_border()

static av_always_inline void backup_mb_border	(	const H264Context *	h,
		H264SliceContext *	sl,
		const uint8_t *	src_y,
		const uint8_t *	src_cb,
		const uint8_t *	src_cr,
		int	linesize,
		int	uvlinesize,
		int	simple )

static

Definition at line 589 of file h264_slice.c.

Referenced by loop_filter().

◆ implicit_weight_table()

static void implicit_weight_table	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	field )

static

Initialize implicit_weight table.

Parameters

field 0/1 initialize the weight for interlaced MBAFF -1 initializes the rest

Definition at line 691 of file h264_slice.c.

Referenced by h264_slice_init().

◆ init_scan_tables()

static void init_scan_tables ( H264Context * h )

static

initialize scan tables

Definition at line 755 of file h264_slice.c.

Referenced by h264_slice_header_init().

◆ get_pixel_format()

static enum AVPixelFormat get_pixel_format	(	H264Context *	h,
		int	force_callback,
		int	data_partitioning )

static

Definition at line 789 of file h264_slice.c.

Referenced by h264_init_ps().

◆ init_dimensions()

static void init_dimensions ( H264Context * h )

static

Definition at line 941 of file h264_slice.c.

Referenced by h264_init_ps().

◆ non_j_pixfmt()

static enum AVPixelFormat non_j_pixfmt ( enum AVPixelFormat a )

static

Definition at line 1063 of file h264_slice.c.

Referenced by h264_init_ps().

◆ h264_init_ps()

static int h264_init_ps	(	H264Context *	h,
		const H264SliceContext *	sl,
		int	first_slice )

static

Definition at line 1074 of file h264_slice.c.

Referenced by h264_field_start().

◆ h264_export_frame_props()

static int h264_export_frame_props ( H264Context * h )

static

Definition at line 1189 of file h264_slice.c.

Referenced by h264_field_start().

◆ h264_select_output_frame()

static int h264_select_output_frame ( H264Context * h )

static

Definition at line 1313 of file h264_slice.c.

Referenced by h264_field_start().

◆ h264_field_start()

static int h264_field_start	(	H264Context *	h,
		const H264SliceContext *	sl,
		const H2645NAL *	nal,
		int	first_slice )

static

Definition at line 1415 of file h264_slice.c.

Referenced by ff_h264_queue_decode_slice().

◆ h264_slice_header_parse()

static int h264_slice_header_parse	(	const H264Context *	h,
		H264SliceContext *	sl,
		const H2645NAL *	nal )

static

Definition at line 1718 of file h264_slice.c.

Referenced by ff_h264_queue_decode_slice().

◆ h264_slice_init()

static int h264_slice_init	(	H264Context *	h,
		H264SliceContext *	sl,
		const H2645NAL *	nal )

static

Definition at line 1937 of file h264_slice.c.

Referenced by ff_h264_queue_decode_slice().

◆ h264_parse_slice_id()

static int h264_parse_slice_id	(	const H264Context *	h,
		H264SliceContext *	sl )

static

Definition at line 2092 of file h264_slice.c.

Referenced by ff_h264_queue_decode_slice().

◆ ff_h264_attach_slice_partition()

int ff_h264_attach_slice_partition	(	const H264Context *	h,
		H264SliceContext *	sl,
		const H2645NAL *	nal )

Attach a slice data partition B or C to the slice started by partition A.

Definition at line 2117 of file h264_slice.c.

Referenced by h264_attach_partitions().

◆ ff_h264_queue_decode_slice()

int ff_h264_queue_decode_slice	(	H264Context *	h,
		const H2645NAL *	nal,
		H264SliceContext **	queued )

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.

Parameters

queued set to the queued context, or NULL if the slice was discarded

Definition at line 2158 of file h264_slice.c.

Referenced by decode_nal_units().

◆ ff_h264_get_slice_type()

int ff_h264_get_slice_type ( const H264SliceContext * sl )

Reconstruct bitstream slice_type.

Definition at line 2296 of file h264_slice.c.

Referenced by fill_slice_long(), and vaapi_h264_decode_slice().

◆ fill_filter_caches_inter()

static av_always_inline void fill_filter_caches_inter	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	mb_type,
		int	top_xy,
		const int	left_xy[LEFT_MBS],
		int	top_type,
		const int	left_type[LEFT_MBS],
		int	mb_xy,
		int	list )

static

Definition at line 2314 of file h264_slice.c.

Referenced by fill_filter_caches().

◆ fill_filter_caches()

static int fill_filter_caches	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	mb_type )

static

Returns: non zero if the loop filter can be skipped

Definition at line 2398 of file h264_slice.c.

Referenced by loop_filter().

◆ loop_filter()

static void loop_filter	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	start_x,
		int	end_x )

static

Definition at line 2540 of file h264_slice.c.

Referenced by decode_slice(), ff_h264_execute_decode_slices(), init_pic_params(), vp3_check_loop_filter(), and xmv_read_extradata().

◆ predict_field_decoding_flag()

static void predict_field_decoding_flag	(	const H264Context *	h,
		H264SliceContext *	sl )

static

Definition at line 2610 of file h264_slice.c.

Referenced by decode_slice().

◆ decode_finish_row()

static void decode_finish_row	(	const H264Context *	h,
		H264SliceContext *	sl )

static

Draw edges and report progress for the last MB row.

Definition at line 2623 of file h264_slice.c.

Referenced by decode_slice().

◆ er_add_slice()

static void er_add_slice	(	H264SliceContext *	sl,
		int	startx,
		int	starty,
		int	endx,
		int	endy,
		int	status )

static

Definition at line 2654 of file h264_slice.c.

Referenced by decode_slice().

◆ decode_slice()

static int decode_slice	(	struct AVCodecContext *	avctx,
		void *	arg )

static

Definition at line 2666 of file h264_slice.c.

Referenced by ff_h264_execute_decode_slices().

◆ 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 2878 of file h264_slice.c.

Referenced by decode_nal_units(), and ff_h264_queue_decode_slice().

Variable Documentation

◆ field_scan

const uint8_t field_scan[16+1]

static

Initial value:

= {
    0 + 0 * 4, 0 + 1 * 4, 1 + 0 * 4, 0 + 2 * 4,
    0 + 3 * 4, 1 + 1 * 4, 1 + 2 * 4, 1 + 3 * 4,
    2 + 0 * 4, 2 + 1 * 4, 2 + 2 * 4, 2 + 3 * 4,
    3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4, 3 + 3 * 4,
}

Definition at line 52 of file h264_slice.c.

Referenced by init_scan_tables().

◆ field_scan8x8

const uint8_t field_scan8x8[64+1]

static

Initial value:

= {
+ 0 * 8, 0 + 1 * 8, 0 + 2 * 8, 1 + 0 * 8,
+ 1 * 8, 0 + 3 * 8, 0 + 4 * 8, 1 + 2 * 8,
+ 0 * 8, 1 + 3 * 8, 0 + 5 * 8, 0 + 6 * 8,
+ 7 * 8, 1 + 4 * 8, 2 + 1 * 8, 3 + 0 * 8,
+ 2 * 8, 1 + 5 * 8, 1 + 6 * 8, 1 + 7 * 8,
+ 3 * 8, 3 + 1 * 8, 4 + 0 * 8, 3 + 2 * 8,
+ 4 * 8, 2 + 5 * 8, 2 + 6 * 8, 2 + 7 * 8,
+ 3 * 8, 4 + 1 * 8, 5 + 0 * 8, 4 + 2 * 8,
+ 4 * 8, 3 + 5 * 8, 3 + 6 * 8, 3 + 7 * 8,
+ 3 * 8, 5 + 1 * 8, 6 + 0 * 8, 5 + 2 * 8,
+ 4 * 8, 4 + 5 * 8, 4 + 6 * 8, 4 + 7 * 8,
+ 3 * 8, 6 + 1 * 8, 6 + 2 * 8, 5 + 4 * 8,
+ 5 * 8, 5 + 6 * 8, 5 + 7 * 8, 6 + 3 * 8,
+ 0 * 8, 7 + 1 * 8, 6 + 4 * 8, 6 + 5 * 8,
+ 6 * 8, 6 + 7 * 8, 7 + 2 * 8, 7 + 3 * 8,
+ 4 * 8, 7 + 5 * 8, 7 + 6 * 8, 7 + 7 * 8,
}

Definition at line 59 of file h264_slice.c.

Referenced by init_scan_tables().

◆ field_scan8x8_cavlc

const uint8_t field_scan8x8_cavlc[64+1]

static

Initial value:

= {
+ 0 * 8, 1 + 1 * 8, 2 + 0 * 8, 0 + 7 * 8,
+ 2 * 8, 2 + 3 * 8, 2 + 4 * 8, 3 + 3 * 8,
+ 4 * 8, 4 + 3 * 8, 4 + 4 * 8, 5 + 3 * 8,
+ 5 * 8, 7 + 0 * 8, 6 + 6 * 8, 7 + 4 * 8,
+ 1 * 8, 0 + 3 * 8, 1 + 3 * 8, 1 + 4 * 8,
+ 5 * 8, 3 + 1 * 8, 2 + 5 * 8, 4 + 1 * 8,
+ 5 * 8, 5 + 1 * 8, 4 + 5 * 8, 6 + 1 * 8,
+ 6 * 8, 7 + 1 * 8, 6 + 7 * 8, 7 + 5 * 8,
+ 2 * 8, 0 + 4 * 8, 0 + 5 * 8, 2 + 1 * 8,
+ 6 * 8, 4 + 0 * 8, 2 + 6 * 8, 5 + 0 * 8,
+ 6 * 8, 6 + 0 * 8, 4 + 6 * 8, 6 + 2 * 8,
+ 7 * 8, 6 + 4 * 8, 7 + 2 * 8, 7 + 6 * 8,
+ 0 * 8, 1 + 2 * 8, 0 + 6 * 8, 3 + 0 * 8,
+ 7 * 8, 3 + 2 * 8, 2 + 7 * 8, 4 + 2 * 8,
+ 7 * 8, 5 + 2 * 8, 4 + 7 * 8, 5 + 4 * 8,
+ 3 * 8, 6 + 5 * 8, 7 + 3 * 8, 7 + 7 * 8,
}

Definition at line 78 of file h264_slice.c.

Referenced by init_scan_tables().

◆ zigzag_scan8x8_cavlc

const uint8_t zigzag_scan8x8_cavlc[64+1]

static

Initial value:

= {
+ 0 * 8, 1 + 1 * 8, 1 + 2 * 8, 2 + 2 * 8,
+ 1 * 8, 0 + 5 * 8, 3 + 3 * 8, 7 + 0 * 8,
+ 4 * 8, 1 + 7 * 8, 5 + 3 * 8, 6 + 3 * 8,
+ 7 * 8, 6 + 4 * 8, 5 + 6 * 8, 7 + 5 * 8,
+ 0 * 8, 2 + 0 * 8, 0 + 3 * 8, 3 + 1 * 8,
+ 2 * 8, 0 + 6 * 8, 4 + 2 * 8, 6 + 1 * 8,
+ 5 * 8, 2 + 6 * 8, 6 + 2 * 8, 5 + 4 * 8,
+ 7 * 8, 7 + 3 * 8, 4 + 7 * 8, 7 + 6 * 8,
+ 1 * 8, 3 + 0 * 8, 0 + 4 * 8, 4 + 0 * 8,
+ 3 * 8, 1 + 5 * 8, 5 + 1 * 8, 5 + 2 * 8,
+ 6 * 8, 3 + 5 * 8, 7 + 1 * 8, 4 + 5 * 8,
+ 6 * 8, 7 + 4 * 8, 5 + 7 * 8, 6 + 7 * 8,
+ 2 * 8, 2 + 1 * 8, 1 + 3 * 8, 5 + 0 * 8,
+ 4 * 8, 2 + 4 * 8, 6 + 0 * 8, 4 + 3 * 8,
+ 7 * 8, 4 + 4 * 8, 7 + 2 * 8, 3 + 6 * 8,
+ 5 * 8, 6 + 5 * 8, 6 + 6 * 8, 7 + 7 * 8,
}

Definition at line 98 of file h264_slice.c.

Referenced by init_scan_tables().

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ IN_RANGE

◆ REBASE_PICTURE

◆ TRANSPOSE [1/2]

◆ TRANSPOSE [2/2]

◆ HWACCEL_MAX

Function Documentation

◆ release_unused_pictures()

◆ alloc_scratch_buffers()

◆ init_table_pools()

◆ alloc_picture()

◆ find_unused_picture()

◆ copy_picture_range()

◆ color_frame()

◆ h264_slice_header_init()

◆ ff_h264_update_thread_context()

◆ ff_h264_update_thread_context_for_user()

◆ h264_frame_start()

◆ backup_mb_border()

◆ implicit_weight_table()

◆ init_scan_tables()

◆ get_pixel_format()

◆ init_dimensions()

◆ non_j_pixfmt()

◆ h264_init_ps()

◆ h264_export_frame_props()

◆ h264_select_output_frame()

◆ h264_field_start()

◆ h264_slice_header_parse()

◆ h264_slice_init()

◆ h264_parse_slice_id()

◆ ff_h264_attach_slice_partition()

◆ ff_h264_queue_decode_slice()

◆ ff_h264_get_slice_type()

◆ fill_filter_caches_inter()

◆ fill_filter_caches()

◆ loop_filter()

◆ predict_field_decoding_flag()

◆ decode_finish_row()

◆ er_add_slice()

◆ decode_slice()

◆ ff_h264_execute_decode_slices()

Variable Documentation

◆ field_scan

◆ field_scan8x8

◆ field_scan8x8_cavlc

◆ zigzag_scan8x8_cavlc