libavcodec/diracdec.c File Reference

Dirac Decoder. More...

#include "avcodec.h"
#include "dsputil.h"
#include "get_bits.h"
#include "bytestream.h"
#include "golomb.h"
#include "dirac_arith.h"
#include "mpeg12data.h"
#include "dwt.h"
#include "dirac.h"
#include "diracdsp.h"

Go to the source code of this file.

Data Structures

struct  DiracFrame
struct  DiracBlock
struct  SubBand
struct  Plane
struct  DiracContext
struct  lowdelay_slice

Defines

#define MAX_DWT_LEVELS   5
 The spec limits the number of wavelet decompositions to 4 for both level 1 (VC-2) and 128 (long-gop default).
#define MAX_REFERENCE_FRAMES   8
 The spec limits this to 3 for frame coding, but in practice can be as high as 6.
#define MAX_DELAY   5
#define MAX_FRAMES   (MAX_REFERENCE_FRAMES + MAX_DELAY + 1)
#define MAX_QUANT   68
#define MAX_BLOCKSIZE   32
#define DIRAC_REF_MASK_REF1   1
 DiracBlock->ref flags, if set then the block does MC from the given ref.
#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.
#define ff_emulated_edge_mc   ff_emulated_edge_mc_8
#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 CHECKEDREAD(dst, cond, errmsg)
#define ROLLOFF(i)
#define DATA_UNIT_HEADER_SIZE   13
 Dirac Specification -> 9.6 Parse Info Header Syntax.

Enumerations

enum  dirac_parse_code { pc_seq_header = 0x00, pc_eos = 0x10, pc_aux_data = 0x20, pc_padding = 0x30 }
 Dirac Specification -> Parse code values. More...
enum  dirac_subband { subband_ll = 0, subband_hl = 1, subband_lh = 2, subband_hh = 3 }

Functions

static int divide3 (int x)
static DiracFrame * remove_frame (DiracFrame *framelist[], int picnum)
static int add_frame (DiracFrame *framelist[], int maxframes, DiracFrame *frame)
static int alloc_sequence_buffers (DiracContext *s)
static void free_sequence_buffers (DiracContext *s)
static av_cold int dirac_decode_init (AVCodecContext *avctx)
static void dirac_decode_flush (AVCodecContext *avctx)
static av_cold int dirac_decode_end (AVCodecContext *avctx)
static void coeff_unpack_arith (DiracArith *c, int qfactor, int qoffset, SubBand *b, IDWTELEM *buf, int x, int y)
static int coeff_unpack_golomb (GetBitContext *gb, int qfactor, int qoffset)
static void codeblock (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.
static void intra_dc_prediction (SubBand *b)
 Dirac Specification -> 13.3 intra_dc_prediction(band).
static av_always_inline void decode_subband_internal (DiracContext *s, SubBand *b, int is_arith)
 Dirac Specification -> 13.4.2 Non-skipped subbands.
static int decode_subband_arith (AVCodecContext *avctx, void *b)
static int decode_subband_golomb (AVCodecContext *avctx, void *arg)
static void decode_component (DiracContext *s, int comp)
 Dirac Specification -> [DIRAC_STD] 13.4.1 core_transform_data().
static void lowdelay_subband (DiracContext *s, GetBitContext *gb, int quant, int slice_x, int slice_y, int bits_end, SubBand *b1, SubBand *b2)
static int decode_lowdelay_slice (AVCodecContext *avctx, void *arg)
 Dirac Specification -> 13.5.2 Slices.
static void decode_lowdelay (DiracContext *s)
 Dirac Specification -> 13.5.1 low_delay_transform_data().
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.
static int dirac_unpack_idwt_params (DiracContext *s)
 Dirac Specification -> 11.3 Wavelet transform data.
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.
static int dirac_unpack_block_motion_data (DiracContext *s)
 Dirac Specification -> 12.
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.
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 void 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.
static int dirac_decode_picture_header (DiracContext *s)
 Dirac Specification -> 11.1.1 Picture Header.
static int get_delayed_pic (DiracContext *s, AVFrame *picture, int *data_size)
static int dirac_decode_data_unit (AVCodecContext *avctx, const uint8_t *buf, int size)
static int dirac_decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *pkt)

Variables

static const uint8_t default_qmat [][4][4]
static const int qscale_tab [MAX_QUANT+1]
static const int qoffset_intra_tab [MAX_QUANT+1]
static const int qoffset_inter_tab [MAX_QUANT+1]
static const uint8_t epel_weights [4][4][4]
AVCodec ff_dirac_decoder

Detailed Description

Dirac Decoder.

Author:
Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com>

Definition in file diracdec.c.

Define Documentation

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

Definition at line 75 of file diracdec.c.

Referenced by alloc_sequence_buffers(), and init_planes().

#define CHECKEDREAD ( dst,
cond,
errmsg   ) 

Value:

tmp = svq3_get_ue_golomb(gb); \
    if (cond) { \
        av_log(s->avctx, AV_LOG_ERROR, errmsg); \
        return -1; \
    }\
    dst = tmp;

Referenced by dirac_unpack_idwt_params().

#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 1732 of file diracdec.c.

Referenced by dirac_decode_data_unit(), and dirac_decode_frame().

#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 71 of file diracdec.c.

Referenced by decode_postinit(), decode_slice_header(), dirac_decode_frame(), dirac_decode_picture_header(), get_delayed_pic(), and unreference_pic().

#define DIRAC_REF_MASK_GLOBAL   4

Definition at line 65 of file diracdec.c.

Referenced by decode_block_params(), and pred_mv().

#define DIRAC_REF_MASK_REF1   1

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

Definition at line 63 of file diracdec.c.

Referenced by decode_block_params().

#define DIRAC_REF_MASK_REF2   2

Definition at line 64 of file diracdec.c.

Referenced by decode_block_params().

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

Definition at line 78 of file diracdec.c.

Referenced by alloc_sequence_buffers(), and dirac_unpack_block_motion_data().

#define ff_emulated_edge_mc   ff_emulated_edge_mc_8

Definition at line 73 of file diracdec.c.

Referenced by mc_subpel().

#define MAX_BLOCKSIZE   32

Definition at line 58 of file diracdec.c.

Referenced by add_dc(), alloc_sequence_buffers(), dirac_unpack_prediction_parameters(), ff_mlp_filter_channel(), filter_channel(), init_obmc_weights(), read_header(), read_major_sync(), and shorten_decode_frame().

#define MAX_DELAY   5

Definition at line 55 of file diracdec.c.

Referenced by dirac_decode_frame().

#define MAX_DWT_LEVELS   5

The spec limits the number of wavelet decompositions to 4 for both level 1 (VC-2) and 128 (long-gop default).

5 decompositions is the maximum before >16-bit buffers are needed. Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting the others to 4 decompositions (or 3 for the fidelity filter).

We use this instead of MAX_DECOMPOSITIONS to save some memory.

Definition at line 49 of file diracdec.c.

Referenced by alloc_sequence_buffers(), decode_component(), and dirac_unpack_idwt_params().

#define MAX_FRAMES   (MAX_REFERENCE_FRAMES + MAX_DELAY + 1)

Definition at line 56 of file diracdec.c.

Referenced by check_bits_for_superframe(), dirac_decode_data_unit(), dirac_decode_frame(), dirac_decode_picture_header(), free_sequence_buffers(), and synth_superframe().

#define MAX_QUANT   68

Definition at line 57 of file diracdec.c.

Referenced by codeblock(), and lowdelay_subband().

#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 54 of file diracdec.c.

Referenced by dirac_decode_picture_header().

#define ROLLOFF ( i   ) 

Value:

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

Referenced by weight().

#define SIGN_CTX ( x   )     (CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0))

Definition at line 422 of file diracdec.c.

Referenced by coeff_unpack_arith().

Enumeration Type Documentation

enum dirac_parse_code

Dirac Specification -> Parse code values.

9.6.1 Table 9.1

Enumerator:
pc_seq_header 
pc_eos 
pc_aux_data 
pc_padding 

Definition at line 223 of file diracdec.c.

enum dirac_subband

Enumerator:
subband_ll 
subband_hl 
subband_lh 
subband_hh 

Definition at line 230 of file diracdec.c.

Function Documentation

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

Definition at line 1419 of file diracdec.c.

Referenced by block_mc().

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

Definition at line 304 of file diracdec.c.

Referenced by dirac_decode_frame(), and dirac_decode_picture_header().

static int alloc_sequence_buffers ( DiracContext *  s  )  [static]

Definition at line 315 of file diracdec.c.

Referenced by dirac_decode_data_unit().

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 1435 of file diracdec.c.

Referenced by mc_row().

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

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 473 of file diracdec.c.

Referenced by decode_subband_internal().

static void coeff_unpack_arith ( DiracArith *  c,
int  qfactor,
int  qoffset,
SubBand *  b,
IDWTELEM *  buf,
int  x,
int  y 
) [inline, static]

Definition at line 424 of file diracdec.c.

Referenced by codeblock().

static int coeff_unpack_golomb ( GetBitContext *  gb,
int  qfactor,
int  qoffset 
) [inline, static]

Definition at line 456 of file diracdec.c.

Referenced by codeblock(), and lowdelay_subband().

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

Definition at line 1127 of file diracdec.c.

Referenced by dirac_unpack_block_motion_data().

static void decode_component ( DiracContext *  s,
int  comp 
) [static]

Dirac Specification -> [DIRAC_STD] 13.4.1 core_transform_data().

Definition at line 608 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

static void decode_lowdelay ( DiracContext *  s  )  [static]

Dirac Specification -> 13.5.1 low_delay_transform_data().

Definition at line 735 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

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

Dirac Specification -> 13.5.2 Slices.

slice(sx,sy)

Definition at line 693 of file diracdec.c.

Referenced by decode_lowdelay().

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

Definition at line 589 of file diracdec.c.

Referenced by decode_component().

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

Definition at line 596 of file diracdec.c.

Referenced by decode_component().

static av_always_inline void decode_subband_internal ( DiracContext *  s,
SubBand *  b,
int  is_arith 
) [static]

Dirac Specification -> 13.4.2 Non-skipped subbands.

subband_coeffs()

Definition at line 556 of file diracdec.c.

Referenced by decode_subband_arith(), and decode_subband_golomb().

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

Definition at line 1736 of file diracdec.c.

Referenced by dirac_decode_frame().

static av_cold int dirac_decode_end ( AVCodecContext *  avctx  )  [static]

Definition at line 416 of file diracdec.c.

static void dirac_decode_flush ( AVCodecContext *  avctx  )  [static]

Definition at line 408 of file diracdec.c.

Referenced by dirac_decode_end().

static int dirac_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  data_size,
AVPacket *  pkt 
) [static]

Definition at line 1824 of file diracdec.c.

static int dirac_decode_frame_internal ( DiracContext *  s  )  [static]

Dirac Specification -> 13.0 Transform data syntax.

transform_data()

Definition at line 1543 of file diracdec.c.

Referenced by dirac_decode_data_unit().

static av_cold int dirac_decode_init ( AVCodecContext *  avctx  )  [static]

Definition at line 391 of file diracdec.c.

static int dirac_decode_picture_header ( DiracContext *  s  )  [static]

Dirac Specification -> 11.1.1 Picture Header.

picture_header()

Definition at line 1628 of file diracdec.c.

Referenced by dirac_decode_data_unit().

static int dirac_unpack_block_motion_data ( DiracContext *  s  )  [static]

Dirac Specification -> 12.

Block motion data syntax

Definition at line 1186 of file diracdec.c.

Referenced by dirac_decode_picture_header().

static int dirac_unpack_idwt_params ( DiracContext *  s  )  [static]

Dirac Specification -> 11.3 Wavelet transform data.

wavelet_transform()

Definition at line 938 of file diracdec.c.

Referenced by dirac_decode_picture_header().

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 826 of file diracdec.c.

Referenced by dirac_decode_picture_header().

static int divide3 ( int  x  )  [inline, static]

Definition at line 281 of file diracdec.c.

Referenced by intra_dc_prediction(), and pred_block_dc().

static void free_sequence_buffers ( DiracContext *  s  )  [static]

Definition at line 360 of file diracdec.c.

Referenced by dirac_decode_data_unit(), and dirac_decode_flush().

static int get_delayed_pic ( DiracContext *  s,
AVFrame *  picture,
int *  data_size 
) [static]

Definition at line 1703 of file diracdec.c.

Referenced by dirac_decode_frame().

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

Definition at line 1111 of file diracdec.c.

Referenced by decode_block_params().

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 1267 of file diracdec.c.

Referenced by init_obmc_weights().

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

Definition at line 1253 of file diracdec.c.

Referenced by init_obmc_weight().

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

Definition at line 1286 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

static void init_planes ( DiracContext *  s  )  [static]

Definition at line 773 of file diracdec.c.

Referenced by dirac_decode_picture_header().

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

Definition at line 1507 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

static void intra_dc_prediction ( SubBand *  b  )  [inline, static]

Dirac Specification -> 13.3 intra_dc_prediction(band).

Definition at line 532 of file diracdec.c.

Referenced by decode_lowdelay(), and decode_subband_internal().

static void lowdelay_subband ( DiracContext *  s,
GetBitContext *  gb,
int  quant,
int  slice_x,
int  slice_y,
int  bits_end,
SubBand *  b1,
SubBand *  b2 
) [static]

Definition at line 644 of file diracdec.c.

Referenced by decode_lowdelay_slice().

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

Definition at line 1471 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

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 1326 of file diracdec.c.

Referenced by block_mc().

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

Definition at line 1042 of file diracdec.c.

Referenced by decode_block_params().

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

Definition at line 1026 of file diracdec.c.

Referenced by decode_block_params().

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

Definition at line 1075 of file diracdec.c.

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

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

Definition at line 1012 of file diracdec.c.

Referenced by dirac_unpack_block_motion_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 1167 of file diracdec.c.

Referenced by dirac_unpack_block_motion_data().

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

Definition at line 286 of file diracdec.c.

Referenced by dirac_decode_frame(), and dirac_decode_picture_header().

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

Definition at line 1487 of file diracdec.c.

Referenced by dirac_decode_frame_internal().

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

Definition at line 1241 of file diracdec.c.

Referenced by dv_init_enc_block(), encode_mb_internal(), ff_lpc_calc_coefs(), guess_dc(), init_obmc_weight(), init_obmc_weight_row(), interpolate_lpc(), mc_block(), and try_8x8basis_TMPL().

Variable Documentation

const uint8_t default_qmat[][4][4] [static]

Initial value:

 {
    { { 5,  3,  3,  0}, { 0,  4,  4,  1}, { 0,  5,  5,  2}, { 0,  6,  6,  3} },
    { { 4,  2,  2,  0}, { 0,  4,  4,  2}, { 0,  5,  5,  3}, { 0,  7,  7,  5} },
    { { 5,  3,  3,  0}, { 0,  4,  4,  1}, { 0,  5,  5,  2}, { 0,  6,  6,  3} },
    { { 8,  4,  4,  0}, { 0,  4,  4,  0}, { 0,  4,  4,  0}, { 0,  4,  4,  0} },
    { { 8,  4,  4,  0}, { 0,  4,  4,  0}, { 0,  4,  4,  0}, { 0,  4,  4,  0} },
    { { 0,  4,  4,  8}, { 0,  8,  8, 12}, { 0, 13, 13, 17}, { 0, 17, 17, 21} },
    { { 3,  1,  1,  0}, { 0,  4,  4,  2}, { 0,  6,  6,  5}, { 0,  9,  9,  7} },
}

Definition at line 237 of file diracdec.c.

Referenced by dirac_unpack_idwt_params().

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 1299 of file diracdec.c.

Referenced by mc_subpel().

AVCodec ff_dirac_decoder

Initial value:

 {
    .name           = "dirac",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_DIRAC,
    .priv_data_size = sizeof(DiracContext),
    .init           = dirac_decode_init,
    .close          = dirac_decode_end,
    .decode         = dirac_decode_frame,
    .capabilities   = CODEC_CAP_DELAY,
    .flush          = dirac_decode_flush,
    .long_name      = NULL_IF_CONFIG_SMALL("BBC Dirac VC-2"),
}

Definition at line 1916 of file diracdec.c.

const int qoffset_inter_tab[MAX_QUANT+1] [static]

Initial value:

 {
    1,     2,     2,     3,     3,     4,     4,     5,
    6,     7,     9,    10,    12,    14,    17,    20,
    24,    29,    34,    41,    48,    57,    68,    81,
    96,   114,   136,   162,   192,   228,   272,   323,
    384,   457,   543,   646,   768,   913,  1086,  1292,
    1536,  1827,  2172,  2583,  3072,  3653,  4344,  5166,
    6144,  7307,  8689, 10333, 12288, 14613, 17378, 20666,
    24576, 29226
}

Definition at line 269 of file diracdec.c.

Referenced by codeblock().

const int qoffset_intra_tab[MAX_QUANT+1] [static]

Initial value:

 {
    1,     2,     3,     4,     4,     5,     6,     7,
    8,    10,    12,    14,    16,    19,    23,    27,
    32,    38,    46,    54,    64,    76,    91,   108,
    128,   152,   181,   216,   256,   305,   362,   431,
    512,   609,   724,   861,  1024,  1218,  1448,  1722,
    2048,  2436,  2897,  3445,  4096,  4871,  5793,  6889,
    8192,  9742, 11585, 13777, 16384, 19484, 23171, 27555,
    32768, 38968
}

Definition at line 258 of file diracdec.c.

Referenced by codeblock(), and lowdelay_subband().

const int qscale_tab[MAX_QUANT+1] [static]

Initial value:

 {
    4,     5,     6,     7,     8,    10,    11,    13,
    16,    19,    23,    27,    32,    38,    45,    54,
    64,    76,    91,   108,   128,   152,   181,   215,
    256,   304,   362,   431,   512,   609,   724,   861,
    1024,  1218,  1448,  1722,  2048,  2435,  2896,  3444,
    4096,  4871,  5793,  6889,  8192,  9742, 11585, 13777,
    16384, 19484, 23170, 27554, 32768, 38968, 46341, 55109,
    65536, 77936
}

Definition at line 247 of file diracdec.c.

Referenced by codeblock(), and lowdelay_subband().

Generated on Fri Oct 26 02:50:04 2012 for FFmpeg by  doxygen 1.5.8