#include "config_components.h"
#include "libavutil/avassert.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 "refstruct.h"
#include "thread.h"
#include "threadframe.h"

Macros
#define	IN_RANGE(a, b, size) (((void)(a) >= (void)(b)) && ((void)(a) < (void)((b) + (size))))

#define	REBASE_PICTURE(pic, new_ctx, old_ctx)

#define	TRANSPOSE(x) ((x) >> 2) \| (((x) << 2) & 0xF)

#define	TRANSPOSE(x) ((x) >> 3) \| (((x) & 7) << 3)

#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. More...

static void	init_scan_tables (H264Context *h)
	initialize scan tables More...

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

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)

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

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

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. More...

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. More...

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

Definition at line 281 of file h264_slice.c.

◆ 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 283 of file h264_slice.c.

◆ TRANSPOSE [1/2]

#define TRANSPOSE ( x ) ((x) >> 2) | (((x) << 2) & 0xF)

◆ TRANSPOSE [2/2]

#define TRANSPOSE ( x ) ((x) >> 3) | (((x) & 7) << 3)

◆ HWACCEL_MAX

#define HWACCEL_MAX

Value:

                     (CONFIG_H264_DXVA2_HWACCEL + \
                     (CONFIG_H264_D3D11VA_HWACCEL * 2) + \
                     CONFIG_H264_NVDEC_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 116 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 129 of file h264_slice.c.

Referenced by decode_slice().

◆ init_table_pools()

static int init_table_pools ( H264Context * h )

static

Definition at line 161 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 269 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 288 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 301 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 955 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 331 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 466 of file h264_slice.c.

◆ h264_frame_start()

static int h264_frame_start ( H264Context * h )

static

Definition at line 478 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 584 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 686 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 750 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
	)

static

Definition at line 784 of file h264_slice.c.

Referenced by h264_init_ps().

◆ init_dimensions()

static void init_dimensions ( H264Context * h )

static

Definition at line 915 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 1037 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 1048 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 1161 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 1284 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 1387 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 1679 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 1898 of file h264_slice.c.

Referenced by ff_h264_queue_decode_slice().

◆ 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 2034 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 2159 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 2177 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 2261 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 2403 of file h264_slice.c.

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

◆ predict_field_decoding_flag()

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

static

Definition at line 2473 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 2486 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 2517 of file h264_slice.c.

Referenced by decode_slice().

◆ decode_slice()

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

static

Definition at line 2529 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 2741 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 51 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 58 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 77 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 97 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()

◆ 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