diracdec.c File Reference

#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/pixdesc.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "get_bits.h"
#include "codec_internal.h"
#include "decode.h"
#include "golomb.h"
#include "dirac_arith.h"
#include "dirac_vlc.h"
#include "mpegvideoencdsp.h"
#include "dirac_dwt.h"
#include "dirac.h"
#include "diractab.h"
#include "diracdsp.h"
#include "videodsp.h"

Go to the source code of this file.

Data Structures
struct	DiracFrame
struct	DiracBlock
struct	SubBand
struct	Plane
struct	DiracSlice
struct	DiracContext
struct	SliceCoeffs

Macros
#define	EDGE_WIDTH   16
#define	MAX_REFERENCE_FRAMES   8
	The spec limits this to 3 for frame coding, but in practice can be as high as 6. More...
#define	MAX_DELAY   5 /* limit for main profile for frame coding (TODO: field coding) */
#define	MAX_FRAMES   (MAX_REFERENCE_FRAMES + MAX_DELAY + 1)
#define	MAX_QUANT   255 /* max quant for VC-2 */
#define	MAX_BLOCKSIZE   32 /* maximum xblen/yblen we support */
#define	DIRAC_REF_MASK_REF1   1
	DiracBlock->ref flags, if set then the block does MC from the given ref. More...
#define	DIRAC_REF_MASK_REF2   2
#define	DIRAC_REF_MASK_GLOBAL   4
#define	DELAYED_PIC_REF   4
	Value of Picture.reference when Picture is not a reference picture, but is held for delayed output. More...
#define	CALC_PADDING(size, depth)   (((size + (1 << depth) - 1) >> depth) << depth)
#define	DIVRNDUP(a, b)   (((a) + (b) - 1) / (b))
#define	SIGN_CTX(x)   (CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0))
#define	UNPACK_ARITH(n, type)
#define	INTRA_DC_PRED(n, type)
	Dirac Specification -> 13.3 intra_dc_prediction(band) More...
#define	PARSE_VALUES(type, x, gb, ebits, buf1, buf2)
#define	CHECKEDREAD(dst, cond, errmsg)
#define	ROLLOFF(i)
#define	DATA_UNIT_HEADER_SIZE   13
	Dirac Specification -> 9.6 Parse Info Header Syntax. More...

Enumerations
enum	dirac_subband {   subband_ll = 0, subband_hl = 1, subband_lh = 2, subband_hh = 3,   subband_nb }

Functions
static int	divide3 (int x)
static DiracFrame *	remove_frame (DiracFrame *framelist[], unsigned picnum)
static int	add_frame (DiracFrame *framelist[], int maxframes, DiracFrame *frame)
static int	alloc_sequence_buffers (DiracContext *s)
static int	alloc_buffers (DiracContext *s, int stride)
static av_cold void	free_sequence_buffers (DiracContext *s)
static av_cold int	dirac_decode_init (AVCodecContext *avctx)
static av_cold void	dirac_decode_flush (AVCodecContext *avctx)
static av_cold int	dirac_decode_end (AVCodecContext *avctx)
static int	coeff_unpack_golomb (GetBitContext *gb, int qfactor, int qoffset)
static int	codeblock (const DiracContext *s, SubBand *b, GetBitContext *gb, DiracArith *c, int left, int right, int top, int bottom, int blockcnt_one, int is_arith)
	Decode the coeffs in the rectangle defined by left, right, top, bottom [DIRAC_STD] 13.4.3.2 Codeblock unpacking loop. More...
static av_always_inline int	decode_subband_internal (const DiracContext *s, SubBand *b, int is_arith)
	Dirac Specification -> 13.4.2 Non-skipped subbands. More...
static int	decode_subband_arith (AVCodecContext *avctx, void *b)
static int	decode_subband_golomb (AVCodecContext *avctx, void *arg)
static int	decode_component (DiracContext *s, int comp)
	Dirac Specification -> [DIRAC_STD] 13.4.1 core_transform_data() More...
static void	decode_subband (const DiracContext *s, GetBitContext *gb, int quant, int slice_x, int slice_y, int bits_end, const SubBand *b1, const SubBand *b2)
static int	decode_lowdelay_slice (AVCodecContext *avctx, void *arg)
	Dirac Specification -> 13.5.2 Slices. More...
static int	subband_coeffs (const DiracContext *s, int x, int y, int p, SliceCoeffs c[MAX_DWT_LEVELS])
static int	decode_hq_slice (const DiracContext *s, DiracSlice *slice, uint8_t *tmp_buf)
	VC-2 Specification -> 13.5.3 hq_slice(sx,sy) More...
static int	decode_hq_slice_row (AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
static int	decode_lowdelay (DiracContext *s)
	Dirac Specification -> 13.5.1 low_delay_transform_data() More...
static void	init_planes (DiracContext *s)
static int	dirac_unpack_prediction_parameters (DiracContext *s)
	Unpack the motion compensation parameters Dirac Specification -> 11.2 Picture prediction data. More...
static int	dirac_unpack_idwt_params (DiracContext *s)
	Dirac Specification -> 11.3 Wavelet transform data. More...
static int	pred_sbsplit (uint8_t *sbsplit, int stride, int x, int y)
static int	pred_block_mode (DiracBlock *block, int stride, int x, int y, int refmask)
static void	pred_block_dc (DiracBlock *block, int stride, int x, int y)
static void	pred_mv (DiracBlock *block, int stride, int x, int y, int ref)
static void	global_mv (DiracContext *s, DiracBlock *block, int x, int y, int ref)
static void	decode_block_params (DiracContext *s, DiracArith arith[8], DiracBlock *block, int stride, int x, int y)
static void	propagate_block_data (DiracBlock *block, int stride, int size)
	Copies the current block to the other blocks covered by the current superblock split mode. More...
static int	dirac_unpack_block_motion_data (DiracContext *s)
	Dirac Specification -> More...
static int	weight (int i, int blen, int offset)
static void	init_obmc_weight_row (Plane *p, uint8_t *obmc_weight, int stride, int left, int right, int wy)
static void	init_obmc_weight (Plane *p, uint8_t *obmc_weight, int stride, int left, int right, int top, int bottom)
static void	init_obmc_weights (DiracContext *s, Plane *p, int by)
static int	mc_subpel (DiracContext *s, DiracBlock *block, const uint8_t *src[5], int x, int y, int ref, int plane)
	For block x,y, determine which of the hpel planes to do bilinear interpolation from and set src[] to the location in each hpel plane to MC from. More...
static void	add_dc (uint16_t *dst, int dc, int stride, uint8_t *obmc_weight, int xblen, int yblen)
static void	block_mc (DiracContext *s, DiracBlock *block, uint16_t *mctmp, uint8_t *obmc_weight, int plane, int dstx, int dsty)
static void	mc_row (DiracContext *s, DiracBlock *block, uint16_t *mctmp, int plane, int dsty)
static void	select_dsp_funcs (DiracContext *s, int width, int height, int xblen, int yblen)
static int	interpolate_refplane (DiracContext *s, DiracFrame *ref, int plane, int width, int height)
static int	dirac_decode_frame_internal (DiracContext *s)
	Dirac Specification -> 13.0 Transform data syntax. More...
static int	get_buffer_with_edge (AVCodecContext *avctx, AVFrame *f, int flags)
static int	dirac_decode_picture_header (DiracContext *s)
	Dirac Specification -> 11.1.1 Picture Header. More...
static int	get_delayed_pic (DiracContext *s, AVFrame *picture, int *got_frame)
static int	dirac_decode_data_unit (AVCodecContext *avctx, const uint8_t *buf, int size)
static int	dirac_decode_frame (AVCodecContext *avctx, AVFrame *picture, int *got_frame, AVPacket *pkt)

Variables
static AVOnce	dirac_arith_init = AV_ONCE_INIT
static const uint8_t	epel_weights [4][4][4]
const FFCodec	ff_dirac_decoder

Detailed Description

Dirac Decoder

Author

Marco Gerards marco.nosp@m.@gnu.nosp@m..org, David Conrad, Jordi Ortiz nenjo.nosp@m.rdi@.nosp@m.gmail.nosp@m..com

Definition in file diracdec.c.

Macro Definition Documentation

EDGE_WIDTH

#define EDGE_WIDTH   16

Definition at line 47 of file diracdec.c.

MAX_REFERENCE_FRAMES

#define MAX_REFERENCE_FRAMES   8

The spec limits this to 3 for frame coding, but in practice can be as high as 6.

Definition at line 52 of file diracdec.c.

MAX_DELAY

#define MAX_DELAY   5 /* limit for main profile for frame coding (TODO: field coding) */

Definition at line 53 of file diracdec.c.

MAX_FRAMES

#define MAX_FRAMES   (MAX_REFERENCE_FRAMES + MAX_DELAY + 1)

Definition at line 54 of file diracdec.c.

MAX_QUANT

#define MAX_QUANT   255 /* max quant for VC-2 */

Definition at line 55 of file diracdec.c.

MAX_BLOCKSIZE

#define MAX_BLOCKSIZE   32 /* maximum xblen/yblen we support */

Definition at line 56 of file diracdec.c.

DIRAC_REF_MASK_REF1

#define DIRAC_REF_MASK_REF1   1

DiracBlock->ref flags, if set then the block does MC from the given ref.

Definition at line 61 of file diracdec.c.

DIRAC_REF_MASK_REF2

#define DIRAC_REF_MASK_REF2   2

Definition at line 62 of file diracdec.c.

DIRAC_REF_MASK_GLOBAL

#define DIRAC_REF_MASK_GLOBAL   4

Definition at line 63 of file diracdec.c.

DELAYED_PIC_REF

#define DELAYED_PIC_REF   4

Value of Picture.reference when Picture is not a reference picture, but is held for delayed output.

Definition at line 69 of file diracdec.c.

CALC_PADDING

#define CALC_PADDING	(		size,
			depth
	)		(((size + (1 << depth) - 1) >> depth) << depth)

Definition at line 71 of file diracdec.c.

DIVRNDUP

#define DIVRNDUP	(		a,
			b
	)		(((a) + (b) - 1) / (b))

Definition at line 74 of file diracdec.c.

SIGN_CTX

#define SIGN_CTX

(

x

)

(CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0))

Definition at line 450 of file diracdec.c.

UNPACK_ARITH

#define UNPACK_ARITH	(		n,
			type
	)

Value:

    static inline void coeff_unpack_arith_##n(DiracArith *c, int qfactor, int qoffset, \
                                              SubBand *b, type *buf, int x, int y) \
    { \
        int sign, sign_pred = 0, pred_ctx = CTX_ZPZN_F1; \
        unsigned coeff; \
        const int mstride = -(b->stride >> (1+b->pshift)); \
        if (b->parent) { \
            const type *pbuf = (type *)b->parent->ibuf; \
            const int stride = b->parent->stride >> (1+b->parent->pshift); \
            pred_ctx += !!pbuf[stride * (y>>1) + (x>>1)] << 1; \
        } \
        if (b->orientation == subband_hl) \
            sign_pred = buf[mstride]; \
        if (x) { \
            pred_ctx += !(buf[-1] | buf[mstride] | buf[-1 + mstride]); \
            if (b->orientation == subband_lh) \
                sign_pred = buf[-1]; \
        } else { \
            pred_ctx += !buf[mstride]; \
        } \
        coeff = dirac_get_arith_uint(c, pred_ctx, CTX_COEFF_DATA); \
        if (coeff) { \
            coeff = (coeff * qfactor + qoffset) >> 2; \
            sign  = dirac_get_arith_bit(c, SIGN_CTX(sign_pred)); \
            coeff = (coeff ^ -sign) + sign; \
        } \
        *buf = coeff; \
    } \

Definition at line 452 of file diracdec.c.

INTRA_DC_PRED

#define INTRA_DC_PRED	(		n,
			type
	)

Value:

    static inline void intra_dc_prediction_##n(SubBand *b) \
    { \
        type *buf = (type*)b->ibuf; \
        int x, y; \
        \
        for (x = 1; x < b->width; x++) \
            buf[x] += buf[x-1]; \
        buf += (b->stride >> (1+b->pshift)); \
        \
        for (y = 1; y < b->height; y++) { \
            buf[0] += buf[-(b->stride >> (1+b->pshift))]; \
            \
            for (x = 1; x < b->width; x++) { \
                int pred = buf[x - 1] + buf[x - (b->stride >> (1+b->pshift))] + buf[x - (b->stride >> (1+b->pshift))-1]; \
                buf[x]  += divide3(pred); \
            } \
            buf += (b->stride >> (1+b->pshift)); \
        } \
    } \

Dirac Specification -> 13.3 intra_dc_prediction(band)

Definition at line 571 of file diracdec.c.

PARSE_VALUES

#define PARSE_VALUES	(		type,
			x,
			gb,
			ebits,
			buf1,
			buf2
	)

Value:

    type *buf = (type *)buf1; \
    buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
    if (get_bits_count(gb) >= ebits) \
        return; \
    if (buf2) { \
        buf = (type *)buf2; \
        buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); \
        if (get_bits_count(gb) >= ebits) \
            return; \
    } \

Definition at line 713 of file diracdec.c.

CHECKEDREAD

#define CHECKEDREAD	(		dst,
			cond,
			errmsg
	)

Value:

    tmp = get_interleaved_ue_golomb(gb); \
    if (cond) { \
        av_log(s->avctx, AV_LOG_ERROR, errmsg); \
        return AVERROR_INVALIDDATA; \
    }\
    dst = tmp;

ROLLOFF

#define ROLLOFF

(

i

)

Value:

    offset == 1 ? ((i) ? 5 : 3) :        \
    (1 + (6*(i) + offset - 1) / (2*offset - 1))

DATA_UNIT_HEADER_SIZE

#define DATA_UNIT_HEADER_SIZE   13

Dirac Specification -> 9.6 Parse Info Header Syntax.

parse_info() 4 byte start code + byte parse code + 4 byte size + 4 byte previous size

Definition at line 2118 of file diracdec.c.

Enumeration Type Documentation

dirac_subband

enum dirac_subband

Enumerator
subband_ll
subband_hl
subband_lh
subband_hh
subband_nb

Definition at line 244 of file diracdec.c.

Function Documentation

divide3()

static int divide3 ( int  x )

inlinestatic

Definition at line 253 of file diracdec.c.

Referenced by pred_block_dc().

remove_frame()

static DiracFrame* remove_frame ( DiracFrame *  framelist[], unsigned  picnum  )

static

Definition at line 258 of file diracdec.c.

Referenced by dirac_decode_frame(), and dirac_decode_picture_header().

add_frame()

static int add_frame ( DiracFrame *  framelist[], int  maxframes, DiracFrame *  frame  )

static

Definition at line 276 of file diracdec.c.

Referenced by dirac_decode_frame(), and dirac_decode_picture_header().

alloc_sequence_buffers()

static int alloc_sequence_buffers ( DiracContext *  s )

static

Definition at line 287 of file diracdec.c.

Referenced by dirac_decode_data_unit().

alloc_buffers()

static int alloc_buffers ( DiracContext *  s, int  stride  )

static

Definition at line 325 of file diracdec.c.

Referenced by dirac_decode_data_unit().

free_sequence_buffers()

static av_cold void free_sequence_buffers ( DiracContext *  s )

static

Definition at line 354 of file diracdec.c.

Referenced by dirac_decode_data_unit(), dirac_decode_end(), and dirac_decode_flush().

dirac_decode_init()

static av_cold int dirac_decode_init ( AVCodecContext *  avctx )

static

Definition at line 388 of file diracdec.c.

dirac_decode_flush()

static av_cold void dirac_decode_flush ( AVCodecContext *  avctx )

static

Definition at line 416 of file diracdec.c.

dirac_decode_end()

static av_cold int dirac_decode_end ( AVCodecContext *  avctx )

static

Definition at line 424 of file diracdec.c.

coeff_unpack_golomb()

static int coeff_unpack_golomb ( GetBitContext *  gb, int  qfactor, int  qoffset  )

inlinestatic

Definition at line 441 of file diracdec.c.

Referenced by codeblock().

codeblock()

static int codeblock ( const DiracContext *  s, SubBand *  b, GetBitContext *  gb, DiracArith *  c, int  left, int  right, int  top, int  bottom, int  blockcnt_one, int  is_arith  )

inlinestatic

Decode the coeffs in the rectangle defined by left, right, top, bottom [DIRAC_STD] 13.4.3.2 Codeblock unpacking loop.

codeblock()

Definition at line 489 of file diracdec.c.

Referenced by decode_subband_internal().

decode_subband_internal()

static av_always_inline int decode_subband_internal ( const DiracContext *  s, SubBand *  b, int  is_arith  )

static

Dirac Specification -> 13.4.2 Non-skipped subbands.

subband_coeffs()

Definition at line 599 of file diracdec.c.

Referenced by decode_subband_arith(), and decode_subband_golomb().

decode_subband_arith()

static int decode_subband_arith ( AVCodecContext *  avctx, void *  b  )

static

Definition at line 642 of file diracdec.c.

Referenced by decode_component().

decode_subband_golomb()

static int decode_subband_golomb ( AVCodecContext *  avctx, void *  arg  )

static

Definition at line 648 of file diracdec.c.

Referenced by decode_component().

decode_component()

static int decode_component ( DiracContext *  s, int  comp  )

static

Dirac Specification -> [DIRAC_STD] 13.4.1 core_transform_data()

Definition at line 659 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

decode_subband()

static void decode_subband ( const DiracContext *  s, GetBitContext *  gb, int  quant, int  slice_x, int  slice_y, int  bits_end, const SubBand *  b1, const SubBand *  b2  )

static

Definition at line 725 of file diracdec.c.

Referenced by decode_lowdelay_slice().

decode_lowdelay_slice()

static int decode_lowdelay_slice ( AVCodecContext *  avctx, void *  arg  )

static

Dirac Specification -> 13.5.2 Slices.

slice(sx,sy)

Definition at line 777 of file diracdec.c.

Referenced by decode_lowdelay().

subband_coeffs()

static int subband_coeffs ( const DiracContext *  s, int  x, int  y, int  p, SliceCoeffs  c[MAX_DWT_LEVELS]  )

static

Definition at line 823 of file diracdec.c.

Referenced by decode_hq_slice(), and decode_lowdelay().

decode_hq_slice()

static int decode_hq_slice ( const DiracContext *  s, DiracSlice *  slice, uint8_t *  tmp_buf  )

static

VC-2 Specification -> 13.5.3 hq_slice(sx,sy)

Definition at line 844 of file diracdec.c.

Referenced by decode_hq_slice_row().

decode_hq_slice_row()

static int decode_hq_slice_row ( AVCodecContext *  avctx, void *  arg, int  jobnr, int  threadnr  )

static

Definition at line 918 of file diracdec.c.

Referenced by decode_lowdelay().

decode_lowdelay()

static int decode_lowdelay ( DiracContext *  s )

static

Dirac Specification -> 13.5.1 low_delay_transform_data()

Definition at line 933 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

init_planes()

static void init_planes ( DiracContext *  s )

static

Definition at line 1051 of file diracdec.c.

Referenced by dirac_decode_picture_header().

dirac_unpack_prediction_parameters()

static int dirac_unpack_prediction_parameters ( DiracContext *  s )

static

Unpack the motion compensation parameters Dirac Specification -> 11.2 Picture prediction data.

picture_prediction()

Definition at line 1105 of file diracdec.c.

Referenced by dirac_decode_picture_header().

dirac_unpack_idwt_params()

static int dirac_unpack_idwt_params ( DiracContext *  s )

static

Dirac Specification -> 11.3 Wavelet transform data.

wavelet_transform()

Definition at line 1233 of file diracdec.c.

Referenced by dirac_decode_picture_header().

pred_sbsplit()

static int pred_sbsplit ( uint8_t *  sbsplit, int  stride, int  x, int  y  )

inlinestatic

Definition at line 1329 of file diracdec.c.

Referenced by dirac_unpack_block_motion_data().

pred_block_mode()

static int pred_block_mode ( DiracBlock *  block, int  stride, int  x, int  y, int  refmask  )

inlinestatic

Definition at line 1343 of file diracdec.c.

Referenced by decode_block_params().

pred_block_dc()

static void pred_block_dc ( DiracBlock *  block, int  stride, int  x, int  y  )

inlinestatic

Definition at line 1359 of file diracdec.c.

Referenced by decode_block_params().

pred_mv()

static void pred_mv ( DiracBlock *  block, int  stride, int  x, int  y, int  ref  )

inlinestatic

Definition at line 1392 of file diracdec.c.

Referenced by decode_block_params(), decode_q_branch(), encode_q_branch(), encode_q_branch2(), get_block_bits(), and mvi_predict().

global_mv()

static void global_mv ( DiracContext *  s, DiracBlock *  block, int  x, int  y, int  ref  )

static

Definition at line 1428 of file diracdec.c.

Referenced by decode_block_params().

decode_block_params()

static void decode_block_params ( DiracContext *  s, DiracArith  arith[8], DiracBlock *  block, int  stride, int  x, int  y  )

static

Definition at line 1444 of file diracdec.c.

Referenced by dirac_unpack_block_motion_data().

propagate_block_data()

static void propagate_block_data ( DiracBlock *  block, int  stride, int  size  )

static

Copies the current block to the other blocks covered by the current superblock split mode.

Definition at line 1484 of file diracdec.c.

Referenced by dirac_unpack_block_motion_data().

dirac_unpack_block_motion_data()

static int dirac_unpack_block_motion_data ( DiracContext *  s )

static

Dirac Specification ->

1. Block motion data syntax

Definition at line 1503 of file diracdec.c.

Referenced by dirac_decode_picture_header().

weight()

static int weight ( int  i, int  blen, int  offset  )

static

Definition at line 1563 of file diracdec.c.

Referenced by init_obmc_weight(), and init_obmc_weight_row().

init_obmc_weight_row()

static void init_obmc_weight_row ( Plane *  p, uint8_t *  obmc_weight, int  stride, int  left, int  right, int  wy  )

static

Definition at line 1575 of file diracdec.c.

Referenced by init_obmc_weight().

init_obmc_weight()

static void init_obmc_weight ( Plane *  p, uint8_t *  obmc_weight, int  stride, int  left, int  right, int  top, int  bottom  )

static

Definition at line 1589 of file diracdec.c.

Referenced by init_obmc_weights().

init_obmc_weights()

static void init_obmc_weights ( DiracContext *  s, Plane *  p, int  by  )

static

Definition at line 1608 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

mc_subpel()

static int mc_subpel ( DiracContext *  s, DiracBlock *  block, const uint8_t *  src[5], int  x, int  y, int  ref, int  plane  )

static

For block x,y, determine which of the hpel planes to do bilinear interpolation from and set src[] to the location in each hpel plane to MC from.

Returns

the index of the put_dirac_pixels_tab function to use 0 for 1 plane (fpel,hpel), 1 for 2 planes (qpel), 2 for 4 planes (qpel), and 3 for epel

Definition at line 1648 of file diracdec.c.

Referenced by block_mc().

add_dc()

static void add_dc ( uint16_t *  dst, int  dc, int  stride, uint8_t *  obmc_weight, int  xblen, int  yblen  )

static

Definition at line 1743 of file diracdec.c.

Referenced by block_mc().

block_mc()

static void block_mc ( DiracContext *  s, DiracBlock *  block, uint16_t *  mctmp, uint8_t *  obmc_weight, int  plane, int  dstx, int  dsty  )

static

Definition at line 1759 of file diracdec.c.

Referenced by mc_row().

mc_row()

static void mc_row ( DiracContext *  s, DiracBlock *  block, uint16_t *  mctmp, int  plane, int  dsty  )

static

Definition at line 1795 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

select_dsp_funcs()

static void select_dsp_funcs ( DiracContext *  s, int  width, int  height, int  xblen, int  yblen  )

static

Definition at line 1811 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

interpolate_refplane()

static int interpolate_refplane ( DiracContext *  s, DiracFrame *  ref, int  plane, int  width, int  height  )

static

Definition at line 1831 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

dirac_decode_frame_internal()

static int dirac_decode_frame_internal ( DiracContext *  s )

static

Dirac Specification -> 13.0 Transform data syntax.

transform_data()

Definition at line 1872 of file diracdec.c.

Referenced by dirac_decode_data_unit().

get_buffer_with_edge()

static int get_buffer_with_edge ( AVCodecContext *  avctx, AVFrame *  f, int  flags  )

static

Definition at line 1969 of file diracdec.c.

Referenced by dirac_decode_data_unit(), and dirac_decode_picture_header().

dirac_decode_picture_header()

static int dirac_decode_picture_header ( DiracContext *  s )

static

Dirac Specification -> 11.1.1 Picture Header.

picture_header()

Definition at line 1999 of file diracdec.c.

Referenced by dirac_decode_data_unit().

get_delayed_pic()

static int get_delayed_pic ( DiracContext *  s, AVFrame *  picture, int *  got_frame  )

static

Definition at line 2087 of file diracdec.c.

Referenced by dirac_decode_frame().

dirac_decode_data_unit()

static int dirac_decode_data_unit ( AVCodecContext *  avctx, const uint8_t *  buf, int  size  )

static

Definition at line 2122 of file diracdec.c.

Referenced by dirac_decode_frame().

dirac_decode_frame()

static int dirac_decode_frame ( AVCodecContext *  avctx, AVFrame *  picture, int *  got_frame, AVPacket *  pkt  )

static

Definition at line 2267 of file diracdec.c.

Variable Documentation

dirac_arith_init

AVOnce dirac_arith_init = AV_ONCE_INIT

static

Definition at line 386 of file diracdec.c.

Referenced by dirac_decode_init().

epel_weights

const uint8_t epel_weights[4][4][4]

static

Initial value:

= {
    {{ 16,  0,  0,  0 },
     { 12,  4,  0,  0 },
     {  8,  8,  0,  0 },
     {  4, 12,  0,  0 }},
    {{ 12,  0,  4,  0 },
     {  9,  3,  3,  1 },
     {  6,  6,  2,  2 },
     {  3,  9,  1,  3 }},
    {{  8,  0,  8,  0 },
     {  6,  2,  6,  2 },
     {  4,  4,  4,  4 },
     {  2,  6,  2,  6 }},
    {{  4,  0, 12,  0 },
     {  3,  1,  9,  3 },
     {  2,  2,  6,  6 },
     {  1,  3,  3,  9 }}
}

Definition at line 1621 of file diracdec.c.

Referenced by mc_subpel().

ff_dirac_decoder

const FFCodec ff_dirac_decoder

Initial value:

= {
    .p.name         = "dirac",
    CODEC_LONG_NAME("BBC Dirac VC-2"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_DIRAC,
    .priv_data_size = sizeof(DiracContext),
    .init           = dirac_decode_init,
    .close          = dirac_decode_end,
    FF_CODEC_DECODE_CB(dirac_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_DR1,
    .flush          = dirac_decode_flush,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 2362 of file diracdec.c.