libavcodec/rv34.c File Reference

RV30/40 decoder common data. More...

#include "libavutil/internal.h"
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "golomb.h"
#include "internal.h"
#include "mathops.h"
#include "rectangle.h"
#include "thread.h"
#include "rv34vlc.h"
#include "rv34data.h"
#include "rv34.h"

Go to the source code of this file.

Functions

static void ZERO8x2 (void *dst, int stride)
av_cold int ff_rv34_decode_init (AVCodecContext *avctx)
 Initialize decoder.
int ff_rv34_decode_init_thread_copy (AVCodecContext *avctx)
int ff_rv34_decode_update_thread_context (AVCodecContext *dst, const AVCodecContext *src)
static int get_slice_offset (AVCodecContext *avctx, const uint8_t *buf, int n)
static int finish_frame (AVCodecContext *avctx, AVFrame *pict)
int ff_rv34_decode_frame (AVCodecContext *avctx, void *data, int *got_picture_ptr, AVPacket *avpkt)
av_cold int ff_rv34_decode_end (AVCodecContext *avctx)
RV30/40 4x4 block decoding functions
static int rv34_decode_cbp (GetBitContext *gb, RV34VLC *vlc, int table)
 Decode coded block pattern.
static void decode_coeff (DCTELEM *dst, int coef, int esc, GetBitContext *gb, VLC *vlc, int q)
 Get one coefficient value from the bistream and store it.
static void decode_subblock (DCTELEM *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc, int q)
 Decode 2x2 subblock of coefficients.
static void decode_subblock1 (DCTELEM *dst, int code, GetBitContext *gb, VLC *vlc, int q)
 Decode a single coefficient.
static void decode_subblock3 (DCTELEM *dst, int code, GetBitContext *gb, VLC *vlc, int q_dc, int q_ac1, int q_ac2)
static int rv34_decode_block (DCTELEM *dst, GetBitContext *gb, RV34VLC *rvlc, int fc, int sc, int q_dc, int q_ac1, int q_ac2)
 Decode coefficients for 4x4 block.
RV30/40 bitstream parsing
int ff_rv34_get_start_offset (GetBitContext *gb, int mb_size)
 Decode starting slice position.
static RV34VLC * choose_vlc_set (int quant, int mod, int type)
 Select VLC set for decoding from current quantizer, modifier and frame type.
static int rv34_decode_intra_mb_header (RV34DecContext *r, int8_t *intra_types)
 Decode intra macroblock header and return CBP in case of success, -1 otherwise.
static int rv34_decode_inter_mb_header (RV34DecContext *r, int8_t *intra_types)
 Decode inter macroblock header and return CBP in case of success, -1 otherwise.

Variables

static const int rv34_mb_type_to_lavc [12]
 translation of RV30/40 macroblock types to lavc ones
static RV34VLC intra_vlcs [NUM_INTRA_TABLES]
static RV34VLC inter_vlcs [NUM_INTER_TABLES]

motion vector related code (prediction, reconstruction, motion compensation)

#define GET_PTS_DIFF(a, b)   ((a - b + 8192) & 0x1FFF)
static const uint8_t part_sizes_w [RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 }
 macroblock partition width in 8x8 blocks
static const uint8_t part_sizes_h [RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 }
 macroblock partition height in 8x8 blocks
static const uint8_t avail_indexes [4] = { 6, 7, 10, 11 }
 availability index for subblocks
static const int chroma_coeffs [3] = { 0, 3, 5 }
static const int num_mvs [RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 }
 number of motion vectors in each macroblock type
static int rv34_decode_mv (RV34DecContext *r, int block_type)
 Decode motion vector differences and perform motion vector reconstruction and motion compensation.
static void rv34_pred_mv (RV34DecContext *r, int block_type, int subblock_no, int dmv_no)
 motion vector prediction
static int calc_add_mv (RV34DecContext *r, int dir, int val)
 Calculate motion vector component that should be added for direct blocks.
static void rv34_pred_b_vector (int A[2], int B[2], int C[2], int A_avail, int B_avail, int C_avail, int *mx, int *my)
 Predict motion vector for B-frame macroblock.
static void rv34_pred_mv_b (RV34DecContext *r, int block_type, int dir)
 motion vector prediction for B-frames
static void rv34_pred_mv_rv3 (RV34DecContext *r, int block_type, int dir)
 motion vector prediction - RV3 version
static void rv34_mc (RV34DecContext *r, const int block_type, const int xoff, const int yoff, int mv_off, const int width, const int height, int dir, const int thirdpel, int weighted, qpel_mc_func(*qpel_mc)[16], h264_chroma_mc_func(*chroma_mc))
 generic motion compensation function
static void rv34_mc_1mv (RV34DecContext *r, const int block_type, const int xoff, const int yoff, int mv_off, const int width, const int height, int dir)
static void rv4_weight (RV34DecContext *r)
static void rv34_mc_2mv (RV34DecContext *r, const int block_type)
static void rv34_mc_2mv_skip (RV34DecContext *r)

RV30/40 VLC generating functions

static const int table_offs []
static VLC_TYPE table_data [117592][2]
static void rv34_gen_vlc (const uint8_t *bits, int size, VLC *vlc, const uint8_t *insyms, const int num)
 Generate VLC from codeword lengths.
static av_cold void rv34_init_tables (void)
 Initialize all tables.

Macroblock reconstruction functions

static const int ittrans [9]
 mapping of RV30/40 intra prediction types to standard H.264 types
static const int ittrans16 [4]
 mapping of RV30/40 intra 16x16 prediction types to standard H.264 types
static void rv34_pred_4x4_block (RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right)
 Perform 4x4 intra prediction.
static int adjust_pred16 (int itype, int up, int left)
static void rv34_process_block (RV34DecContext *r, uint8_t *pdst, int stride, int fc, int sc, int q_dc, int q_ac)
static void rv34_output_i16x16 (RV34DecContext *r, int8_t *intra_types, int cbp)
static void rv34_output_intra (RV34DecContext *r, int8_t *intra_types, int cbp)
static int is_mv_diff_gt_3 (int16_t(*motion_val)[2], int step)
static int rv34_set_deblock_coef (RV34DecContext *r)
static int rv34_decode_inter_macroblock (RV34DecContext *r, int8_t *intra_types)
static int rv34_decode_intra_macroblock (RV34DecContext *r, int8_t *intra_types)
static int check_slice_end (RV34DecContext *r, MpegEncContext *s)
static void rv34_decoder_free (RV34DecContext *r)
static int rv34_decoder_alloc (RV34DecContext *r)
static int rv34_decoder_realloc (RV34DecContext *r)
static int rv34_decode_slice (RV34DecContext *r, int end, const uint8_t *buf, int buf_size)

Detailed Description

RV30/40 decoder common data.

Definition in file rv34.c.

Define Documentation

#define GET_PTS_DIFF ( a,
b   )     ((a - b + 8192) & 0x1FFF)

Definition at line 512 of file rv34.c.

Referenced by ff_rv34_decode_frame().

Function Documentation

static int adjust_pred16 ( int  itype,
int  up,
int  left 
) [inline, static]

Definition at line 976 of file rv34.c.

Referenced by rv34_output_i16x16().

static int calc_add_mv ( RV34DecContext *  r,
int  dir,
int  val 
) [static]

Calculate motion vector component that should be added for direct blocks.

Definition at line 517 of file rv34.c.

Referenced by rv34_decode_mv().

static int check_slice_end ( RV34DecContext *  r,
MpegEncContext *  s 
) [static]

Definition at line 1325 of file rv34.c.

Referenced by rv34_decode_slice().

static RV34VLC* choose_vlc_set ( int  quant,
int  mod,
int  type 
) [inline, static]

Select VLC set for decoding from current quantizer, modifier and frame type.

Definition at line 340 of file rv34.c.

Referenced by rv34_decode_inter_macroblock(), rv34_decode_inter_mb_header(), and rv34_decode_intra_mb_header().

static void decode_coeff ( DCTELEM *  dst,
int  coef,
int  esc,
GetBitContext *  gb,
VLC *  vlc,
int  q 
) [inline, static]

Get one coefficient value from the bistream and store it.

Definition at line 219 of file rv34.c.

static void decode_subblock ( DCTELEM *  dst,
int  code,
const int  is_block2,
GetBitContext *  gb,
VLC *  vlc,
int  q 
) [inline, static]

Decode 2x2 subblock of coefficients.

Definition at line 239 of file rv34.c.

Referenced by rv34_decode_block().

static void decode_subblock1 ( DCTELEM *  dst,
int  code,
GetBitContext *  gb,
VLC *  vlc,
int  q 
) [inline, static]

Decode a single coefficient.

Definition at line 257 of file rv34.c.

Referenced by rv34_decode_block().

static void decode_subblock3 ( DCTELEM *  dst,
int  code,
GetBitContext *  gb,
VLC *  vlc,
int  q_dc,
int  q_ac1,
int  q_ac2 
) [inline, static]

Definition at line 263 of file rv34.c.

Referenced by rv34_decode_block().

av_cold int ff_rv34_decode_end ( AVCodecContext *  avctx  ) 

Definition at line 1785 of file rv34.c.

int ff_rv34_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  got_picture_ptr,
AVPacket *  avpkt 
)

Definition at line 1592 of file rv34.c.

av_cold int ff_rv34_decode_init ( AVCodecContext *  avctx  ) 

Initialize decoder.

Definition at line 1469 of file rv34.c.

Referenced by rv30_decode_init(), and rv40_decode_init().

int ff_rv34_decode_init_thread_copy ( AVCodecContext *  avctx  ) 

Definition at line 1513 of file rv34.c.

int ff_rv34_decode_update_thread_context ( AVCodecContext *  dst,
const AVCodecContext *  src 
)

Definition at line 1530 of file rv34.c.

int ff_rv34_get_start_offset ( GetBitContext *  gb,
int  mb_size 
)

Decode starting slice position.

common decoding functions

Todo:
Maybe replace with ff_h263_decode_mba() ?

Definition at line 328 of file rv34.c.

Referenced by rv30_parse_slice_header(), and rv40_parse_slice_header().

static int finish_frame ( AVCodecContext *  avctx,
AVFrame *  pict 
) [static]

Definition at line 1566 of file rv34.c.

Referenced by ff_rv34_decode_frame(), and shorten_decode_frame().

static int get_slice_offset ( AVCodecContext *  avctx,
const uint8_t *  buf,
int  n 
) [static]

Definition at line 1560 of file rv34.c.

static int is_mv_diff_gt_3 ( int16_t(*)  motion_val[2],
int  step 
) [static]

Definition at line 1135 of file rv34.c.

Referenced by rv34_set_deblock_coef().

static int rv34_decode_block ( DCTELEM *  dst,
GetBitContext *  gb,
RV34VLC *  rvlc,
int  fc,
int  sc,
int  q_dc,
int  q_ac1,
int  q_ac2 
) [static]

Decode coefficients for 4x4 block.

This is done by filling 2x2 subblocks with decoded coefficients in this order (the same for subblocks and subblock coefficients): o--o / / o--o

Definition at line 285 of file rv34.c.

Referenced by rv34_decode_inter_macroblock(), rv34_output_i16x16(), and rv34_process_block().

static int rv34_decode_cbp ( GetBitContext *  gb,
RV34VLC *  vlc,
int  table 
) [static]

Decode coded block pattern.

Definition at line 186 of file rv34.c.

Referenced by rv34_decode_inter_mb_header(), and rv34_decode_intra_mb_header().

static int rv34_decode_inter_macroblock ( RV34DecContext *  r,
int8_t *  intra_types 
) [static]

Definition at line 1177 of file rv34.c.

Referenced by rv34_decode_slice().

static int rv34_decode_inter_mb_header ( RV34DecContext *  r,
int8_t *  intra_types 
) [static]

Decode inter macroblock header and return CBP in case of success, -1 otherwise.

Definition at line 386 of file rv34.c.

Referenced by rv34_decode_inter_macroblock().

static int rv34_decode_intra_macroblock ( RV34DecContext *  r,
int8_t *  intra_types 
) [static]

Definition at line 1285 of file rv34.c.

Referenced by rv34_decode_slice().

static int rv34_decode_intra_mb_header ( RV34DecContext *  r,
int8_t *  intra_types 
) [static]

Decode intra macroblock header and return CBP in case of success, -1 otherwise.

Definition at line 351 of file rv34.c.

Referenced by rv34_decode_intra_macroblock().

static int rv34_decode_mv ( RV34DecContext *  r,
int  block_type 
) [static]

Decode motion vector differences and perform motion vector reconstruction and motion compensation.

Definition at line 840 of file rv34.c.

Referenced by rv34_decode_inter_mb_header().

static int rv34_decode_slice ( RV34DecContext *  r,
int  end,
const uint8_t *  buf,
int  buf_size 
) [static]

Definition at line 1387 of file rv34.c.

Referenced by ff_rv34_decode_frame().

static int rv34_decoder_alloc ( RV34DecContext *  r  )  [static]

Definition at line 1353 of file rv34.c.

Referenced by ff_rv34_decode_init(), ff_rv34_decode_init_thread_copy(), and rv34_decoder_realloc().

static void rv34_decoder_free ( RV34DecContext *  r  )  [static]

Definition at line 1341 of file rv34.c.

Referenced by ff_rv34_decode_end(), rv34_decoder_alloc(), and rv34_decoder_realloc().

static int rv34_decoder_realloc ( RV34DecContext *  r  )  [static]

Definition at line 1380 of file rv34.c.

Referenced by ff_rv34_decode_frame(), and ff_rv34_decode_update_thread_context().

static void rv34_gen_vlc ( const uint8_t *  bits,
int  size,
VLC *  vlc,
const uint8_t *  insyms,
const int  num 
) [static]

Generate VLC from codeword lengths.

Parameters:
bits codeword lengths (zeroes are accepted)
size length of input data
vlc output VLC
insyms symbols for input codes (NULL for default ones)
num VLC table number (for static initialization)

Definition at line 107 of file rv34.c.

Referenced by rv34_init_tables().

static av_cold void rv34_init_tables ( void   )  [static]

Initialize all tables.

Definition at line 143 of file rv34.c.

Referenced by ff_rv34_decode_init().

static void rv34_mc ( RV34DecContext *  r,
const int  block_type,
const int  xoff,
const int  yoff,
int  mv_off,
const int  width,
const int  height,
int  dir,
const int  thirdpel,
int  weighted,
qpel_mc_func(*)  qpel_mc[16],
h264_chroma_mc_func *  chroma_mc 
) [inline, static]

generic motion compensation function

Parameters:
r decoder context
block_type type of the current block
xoff horizontal offset from the start of the current block
yoff vertical offset from the start of the current block
mv_off offset to the motion vector information
width width of the current partition in 8x8 blocks
height height of the current partition in 8x8 blocks
dir motion compensation direction (i.e. from the last or the next reference frame)
thirdpel motion vectors are specified in 1/3 of pixel
qpel_mc a set of functions used to perform luma motion compensation
chroma_mc a set of functions used to perform chroma motion compensation

Definition at line 662 of file rv34.c.

Referenced by rv34_mc_1mv(), rv34_mc_2mv(), and rv34_mc_2mv_skip().

static void rv34_mc_1mv ( RV34DecContext *  r,
const int  block_type,
const int  xoff,
const int  yoff,
int  mv_off,
const int  width,
const int  height,
int  dir 
) [static]

Definition at line 763 of file rv34.c.

Referenced by rv34_decode_mv().

static void rv34_mc_2mv ( RV34DecContext *  r,
const int  block_type 
) [static]

Definition at line 794 of file rv34.c.

Referenced by rv34_decode_mv().

static void rv34_mc_2mv_skip ( RV34DecContext *  r  )  [static]

Definition at line 813 of file rv34.c.

Referenced by rv34_decode_mv().

static void rv34_output_i16x16 ( RV34DecContext *  r,
int8_t *  intra_types,
int  cbp 
) [static]

Definition at line 1008 of file rv34.c.

Referenced by rv34_decode_inter_macroblock(), and rv34_decode_intra_macroblock().

static void rv34_output_intra ( RV34DecContext *  r,
int8_t *  intra_types,
int  cbp 
) [static]

Definition at line 1071 of file rv34.c.

Referenced by rv34_decode_inter_macroblock(), and rv34_decode_intra_macroblock().

static void rv34_pred_4x4_block ( RV34DecContext *  r,
uint8_t *  dst,
int  stride,
int  itype,
int  up,
int  left,
int  down,
int  right 
) [static]

Perform 4x4 intra prediction.

Definition at line 949 of file rv34.c.

Referenced by rv34_output_intra().

static void rv34_pred_b_vector ( int  A[2],
int  B[2],
int  C[2],
int  A_avail,
int  B_avail,
int  C_avail,
int *  mx,
int *  my 
) [inline, static]

Predict motion vector for B-frame macroblock.

Definition at line 527 of file rv34.c.

Referenced by rv34_pred_mv_b().

static void rv34_pred_mv ( RV34DecContext *  r,
int  block_type,
int  subblock_no,
int  dmv_no 
) [static]

motion vector prediction

Motion prediction performed for the block by using median prediction of motion vectors from the left, top and right top blocks but in corner cases some other vectors may be used instead.

Definition at line 463 of file rv34.c.

Referenced by rv34_decode_mv().

static void rv34_pred_mv_b ( RV34DecContext *  r,
int  block_type,
int  dir 
) [static]

motion vector prediction for B-frames

Definition at line 547 of file rv34.c.

Referenced by rv34_decode_mv().

static void rv34_pred_mv_rv3 ( RV34DecContext *  r,
int  block_type,
int  dir 
) [static]

motion vector prediction - RV3 version

Definition at line 599 of file rv34.c.

Referenced by rv34_decode_mv().

static void rv34_process_block ( RV34DecContext *  r,
uint8_t *  pdst,
int  stride,
int  fc,
int  sc,
int  q_dc,
int  q_ac 
) [inline, static]

Definition at line 992 of file rv34.c.

Referenced by rv34_decode_inter_macroblock(), rv34_output_i16x16(), and rv34_output_intra().

static int rv34_set_deblock_coef ( RV34DecContext *  r  )  [static]

Definition at line 1147 of file rv34.c.

Referenced by rv34_decode_inter_macroblock().

static void rv4_weight ( RV34DecContext *  r  )  [static]

Definition at line 772 of file rv34.c.

Referenced by rv34_mc_2mv(), and rv34_mc_2mv_skip().

static void ZERO8x2 ( void *  dst,
int  stride 
) [inline, static]

Definition at line 44 of file rv34.c.

Referenced by rv34_decode_mv(), and rv34_pred_mv_b().

Variable Documentation

const uint8_t avail_indexes[4] = { 6, 7, 10, 11 } [static]

availability index for subblocks

Definition at line 454 of file rv34.c.

Referenced by rv34_pred_mv(), and rv34_pred_mv_rv3().

const int chroma_coeffs[3] = { 0, 3, 5 } [static]

Definition at line 645 of file rv34.c.

Referenced by rv34_mc().

RV34VLC inter_vlcs[NUM_INTER_TABLES] [static]

Definition at line 67 of file rv34.c.

RV34VLC intra_vlcs[NUM_INTRA_TABLES] [static]

Definition at line 67 of file rv34.c.

const int ittrans[9] [static]

Initial value:

 {
 DC_PRED, VERT_PRED, HOR_PRED, DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_LEFT_PRED,
 VERT_RIGHT_PRED, VERT_LEFT_PRED, HOR_UP_PRED, HOR_DOWN_PRED,
}
mapping of RV30/40 intra prediction types to standard H.264 types

Definition at line 936 of file rv34.c.

const int ittrans16[4] [static]

Initial value:

 {
 DC_PRED8x8, VERT_PRED8x8, HOR_PRED8x8, PLANE_PRED8x8,
}
mapping of RV30/40 intra 16x16 prediction types to standard H.264 types

Definition at line 942 of file rv34.c.

const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 } [static]

number of motion vectors in each macroblock type

Definition at line 834 of file rv34.c.

Referenced by tgv_decode_inter().

const uint8_t part_sizes_h[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 } [static]

macroblock partition height in 8x8 blocks

Definition at line 451 of file rv34.c.

Referenced by rv34_pred_mv().

const uint8_t part_sizes_w[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 } [static]

macroblock partition width in 8x8 blocks

Definition at line 448 of file rv34.c.

Referenced by rv34_pred_mv().

const int rv34_mb_type_to_lavc[12] [static]

Initial value:

 {
    MB_TYPE_INTRA,
    MB_TYPE_INTRA16x16              | MB_TYPE_SEPARATE_DC,
    MB_TYPE_16x16   | MB_TYPE_L0,
    MB_TYPE_8x8     | MB_TYPE_L0,
    MB_TYPE_16x16   | MB_TYPE_L0,
    MB_TYPE_16x16   | MB_TYPE_L1,
    MB_TYPE_SKIP,
    MB_TYPE_DIRECT2 | MB_TYPE_16x16,
    MB_TYPE_16x8    | MB_TYPE_L0,
    MB_TYPE_8x16    | MB_TYPE_L0,
    MB_TYPE_16x16   | MB_TYPE_L0L1,
    MB_TYPE_16x16   | MB_TYPE_L0    | MB_TYPE_SEPARATE_DC
}
translation of RV30/40 macroblock types to lavc ones

Definition at line 51 of file rv34.c.

Referenced by rv34_decode_inter_mb_header().

VLC_TYPE table_data[117592][2] [static]

Definition at line 97 of file rv34.c.

Referenced by ff_ivi_init_static_vlc(), and rv34_gen_vlc().

const int table_offs[] [static]

Initial value:

 {
      0,   1818,   3622,   4144,   4698,   5234,   5804,   5868,   5900,   5932,
   5996,   6252,   6316,   6348,   6380,   7674,   8944,  10274,  11668,  12250,
  14060,  15846,  16372,  16962,  17512,  18148,  18180,  18212,  18244,  18308,
  18564,  18628,  18660,  18692,  20036,  21314,  22648,  23968,  24614,  26384,
  28190,  28736,  29366,  29938,  30608,  30640,  30672,  30704,  30768,  31024,
  31088,  31120,  31184,  32570,  33898,  35236,  36644,  37286,  39020,  40802,
  41368,  42052,  42692,  43348,  43380,  43412,  43444,  43476,  43604,  43668,
  43700,  43732,  45100,  46430,  47778,  49160,  49802,  51550,  53340,  53972,
  54648,  55348,  55994,  56122,  56154,  56186,  56218,  56346,  56410,  56442,
  56474,  57878,  59290,  60636,  62036,  62682,  64460,  64524,  64588,  64716,
  64844,  66076,  67466,  67978,  68542,  69064,  69648,  70296,  72010,  72074,
  72138,  72202,  72330,  73572,  74936,  75454,  76030,  76566,  77176,  77822,
  79582,  79646,  79678,  79742,  79870,  81180,  82536,  83064,  83672,  84242,
  84934,  85576,  87384,  87448,  87480,  87544,  87672,  88982,  90340,  90902,
  91598,  92182,  92846,  93488,  95246,  95278,  95310,  95374,  95502,  96878,
  98266,  98848,  99542, 100234, 100884, 101524, 103320, 103352, 103384, 103416,
 103480, 104874, 106222, 106910, 107584, 108258, 108902, 109544, 111366, 111398,
 111430, 111462, 111494, 112878, 114320, 114988, 115660, 116310, 116950, 117592
}

Definition at line 76 of file rv34.c.

Referenced by rv34_gen_vlc().

Generated on Fri Oct 26 02:50:07 2012 for FFmpeg by  doxygen 1.5.8