h264_slice.c File Reference

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

#include "libavutil/avassert.h"
#include "libavutil/display.h"
#include "libavutil/imgutils.h"
#include "libavutil/stereo3d.h"
#include "libavutil/timer.h"
#include "internal.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_mvpred.h"
#include "h264_ps.h"
#include "golomb.h"
#include "mathops.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "rectangle.h"
#include "thread.h"

Go to the source code of this file.

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 (H264Context *h)
static void	copy_picture_range (H264Picture **to, H264Picture **from, int count, H264Context *new_base, H264Context *old_base)
static int	h264_slice_header_init (H264Context *h)
int	ff_h264_update_thread_context (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, uint8_t *src_y, uint8_t *src_cb, 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 int	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, int left_xy[LEFT_MBS], int top_type, 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 265 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 267 of file h264_slice.c.

Referenced by copy_picture_range(), and ff_h264_update_thread_context().

TRANSPOSE [1/2]

#define TRANSPOSE

(

x

)

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

Referenced by init_scan_tables().

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)

Referenced by get_pixel_format().

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 ( H264Context *  h )

static

Definition at line 253 of file h264_slice.c.

Referenced by h264_frame_start().

copy_picture_range()

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

static

Definition at line 272 of file h264_slice.c.

Referenced by ff_h264_update_thread_context().

h264_slice_header_init()

static int h264_slice_header_init ( H264Context *  h )

static

Definition at line 911 of file h264_slice.c.

Referenced by copy_picture_range(), 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 288 of file h264_slice.c.

Referenced by find_start_code().

h264_frame_start()

static int h264_frame_start ( H264Context *  h )

static

Definition at line 449 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, uint8_t *  src_y, uint8_t *  src_cb, uint8_t *  src_cr, int  linesize, int  uvlinesize, int  simple  )

static

Definition at line 556 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 658 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 722 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 756 of file h264_slice.c.

Referenced by h264_init_ps().

init_dimensions()

static int init_dimensions ( H264Context *  h )

static

Definition at line 869 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 995 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 1006 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 1125 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 1293 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 1396 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 1669 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 1886 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 2022 of file h264_slice.c.

Referenced by decode_nal_units(), and find_start_code().

ff_h264_get_slice_type()

int ff_h264_get_slice_type

(

const H264SliceContext *

sl

)

Reconstruct bitstream slice_type.

Definition at line 2147 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, int  left_xy[LEFT_MBS], int  top_type, int  left_type[LEFT_MBS], int  mb_xy, int  list  )

static

Definition at line 2165 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 2249 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 2391 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 2461 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 2474 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 2505 of file h264_slice.c.

Referenced by decode_slice().

decode_slice()

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

static

Definition at line 2519 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 2733 of file h264_slice.c.

Referenced by decode_nal_units(), ff_h264_queue_decode_slice(), and find_start_code().

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 + 0 * 8, 0 + 1 * 8, 0 + 2 * 8, 1 + 0 * 8,
    1 + 1 * 8, 0 + 3 * 8, 0 + 4 * 8, 1 + 2 * 8,
    2 + 0 * 8, 1 + 3 * 8, 0 + 5 * 8, 0 + 6 * 8,
    0 + 7 * 8, 1 + 4 * 8, 2 + 1 * 8, 3 + 0 * 8,
    2 + 2 * 8, 1 + 5 * 8, 1 + 6 * 8, 1 + 7 * 8,
    2 + 3 * 8, 3 + 1 * 8, 4 + 0 * 8, 3 + 2 * 8,
    2 + 4 * 8, 2 + 5 * 8, 2 + 6 * 8, 2 + 7 * 8,
    3 + 3 * 8, 4 + 1 * 8, 5 + 0 * 8, 4 + 2 * 8,
    3 + 4 * 8, 3 + 5 * 8, 3 + 6 * 8, 3 + 7 * 8,
    4 + 3 * 8, 5 + 1 * 8, 6 + 0 * 8, 5 + 2 * 8,
    4 + 4 * 8, 4 + 5 * 8, 4 + 6 * 8, 4 + 7 * 8,
    5 + 3 * 8, 6 + 1 * 8, 6 + 2 * 8, 5 + 4 * 8,
    5 + 5 * 8, 5 + 6 * 8, 5 + 7 * 8, 6 + 3 * 8,
    7 + 0 * 8, 7 + 1 * 8, 6 + 4 * 8, 6 + 5 * 8,
    6 + 6 * 8, 6 + 7 * 8, 7 + 2 * 8, 7 + 3 * 8,
    7 + 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 + 0 * 8, 1 + 1 * 8, 2 + 0 * 8, 0 + 7 * 8,
    2 + 2 * 8, 2 + 3 * 8, 2 + 4 * 8, 3 + 3 * 8,
    3 + 4 * 8, 4 + 3 * 8, 4 + 4 * 8, 5 + 3 * 8,
    5 + 5 * 8, 7 + 0 * 8, 6 + 6 * 8, 7 + 4 * 8,
    0 + 1 * 8, 0 + 3 * 8, 1 + 3 * 8, 1 + 4 * 8,
    1 + 5 * 8, 3 + 1 * 8, 2 + 5 * 8, 4 + 1 * 8,
    3 + 5 * 8, 5 + 1 * 8, 4 + 5 * 8, 6 + 1 * 8,
    5 + 6 * 8, 7 + 1 * 8, 6 + 7 * 8, 7 + 5 * 8,
    0 + 2 * 8, 0 + 4 * 8, 0 + 5 * 8, 2 + 1 * 8,
    1 + 6 * 8, 4 + 0 * 8, 2 + 6 * 8, 5 + 0 * 8,
    3 + 6 * 8, 6 + 0 * 8, 4 + 6 * 8, 6 + 2 * 8,
    5 + 7 * 8, 6 + 4 * 8, 7 + 2 * 8, 7 + 6 * 8,
    1 + 0 * 8, 1 + 2 * 8, 0 + 6 * 8, 3 + 0 * 8,
    1 + 7 * 8, 3 + 2 * 8, 2 + 7 * 8, 4 + 2 * 8,
    3 + 7 * 8, 5 + 2 * 8, 4 + 7 * 8, 5 + 4 * 8,
    6 + 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 + 0 * 8, 1 + 1 * 8, 1 + 2 * 8, 2 + 2 * 8,
    4 + 1 * 8, 0 + 5 * 8, 3 + 3 * 8, 7 + 0 * 8,
    3 + 4 * 8, 1 + 7 * 8, 5 + 3 * 8, 6 + 3 * 8,
    2 + 7 * 8, 6 + 4 * 8, 5 + 6 * 8, 7 + 5 * 8,
    1 + 0 * 8, 2 + 0 * 8, 0 + 3 * 8, 3 + 1 * 8,
    3 + 2 * 8, 0 + 6 * 8, 4 + 2 * 8, 6 + 1 * 8,
    2 + 5 * 8, 2 + 6 * 8, 6 + 2 * 8, 5 + 4 * 8,
    3 + 7 * 8, 7 + 3 * 8, 4 + 7 * 8, 7 + 6 * 8,
    0 + 1 * 8, 3 + 0 * 8, 0 + 4 * 8, 4 + 0 * 8,
    2 + 3 * 8, 1 + 5 * 8, 5 + 1 * 8, 5 + 2 * 8,
    1 + 6 * 8, 3 + 5 * 8, 7 + 1 * 8, 4 + 5 * 8,
    4 + 6 * 8, 7 + 4 * 8, 5 + 7 * 8, 6 + 7 * 8,
    0 + 2 * 8, 2 + 1 * 8, 1 + 3 * 8, 5 + 0 * 8,
    1 + 4 * 8, 2 + 4 * 8, 6 + 0 * 8, 4 + 3 * 8,
    0 + 7 * 8, 4 + 4 * 8, 7 + 2 * 8, 3 + 6 * 8,
    5 + 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().