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vp8.c File Reference
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "internal.h"
#include "vp8.h"
#include "vp8data.h"
#include "rectangle.h"
#include "thread.h"

Go to the source code of this file.

Macros

#define MV_EDGE_CHECK(n)
 
#define XCHG(a, b, xchg)
 
#define MARGIN   (16 << 2)
 
#define check_thread_pos(td, otd, mb_x_check, mb_y_check)
 
#define update_pos(td, mb_y, mb_x)
 
#define REBASE(pic)   pic ? pic - &s_src->frames[0] + &s->frames[0] : NULL
 

Functions

static void free_buffers (VP8Context *s)
 
static int vp8_alloc_frame (VP8Context *s, VP8Frame *f, int ref)
 
static void vp8_release_frame (VP8Context *s, VP8Frame *f)
 
static int vp8_ref_frame (VP8Context *s, VP8Frame *dst, VP8Frame *src)
 
static void vp8_decode_flush_impl (AVCodecContext *avctx, int free_mem)
 
static void vp8_decode_flush (AVCodecContext *avctx)
 
static int update_dimensions (VP8Context *s, int width, int height)
 
static void parse_segment_info (VP8Context *s)
 
static void update_lf_deltas (VP8Context *s)
 
static int setup_partitions (VP8Context *s, const uint8_t *buf, int buf_size)
 
static void get_quants (VP8Context *s)
 
static VP56Frame ref_to_update (VP8Context *s, int update, VP56Frame ref)
 Determine which buffers golden and altref should be updated with after this frame.
 
static void update_refs (VP8Context *s)
 
static int decode_frame_header (VP8Context *s, const uint8_t *buf, int buf_size)
 
static av_always_inline void clamp_mv (VP8Context *s, VP56mv *dst, const VP56mv *src)
 
static int read_mv_component (VP56RangeCoder *c, const uint8_t *p)
 Motion vector coding, 17.1.
 
static av_always_inline const
uint8_t * 		get_submv_prob (uint32_t left, uint32_t top)
 
static av_always_inline int decode_splitmvs (VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb, int layout)
 Split motion vector prediction, 16.4.
 
static av_always_inline void decode_mvs (VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, int layout)
 
static av_always_inline void decode_intra4x4_modes (VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb, int mb_x, int keyframe, int layout)
 
static av_always_inline void decode_mb_mode (VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, uint8_t *segment, uint8_t *ref, int layout)
 
static int decode_block_coeffs_internal (VP56RangeCoder *r, int16_t block[16], uint8_t probs[16][3][NUM_DCT_TOKENS-1], int i, uint8_t *token_prob, int16_t qmul[2])
 
static av_always_inline int decode_block_coeffs (VP56RangeCoder *c, int16_t block[16], uint8_t probs[16][3][NUM_DCT_TOKENS-1], int i, int zero_nhood, int16_t qmul[2])
 
static av_always_inline void decode_mb_coeffs (VP8Context *s, VP8ThreadData *td, VP56RangeCoder *c, VP8Macroblock *mb, uint8_t t_nnz[9], uint8_t l_nnz[9])
 
static av_always_inline void backup_mb_border (uint8_t *top_border, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int simple)
 
static av_always_inline void xchg_mb_border (uint8_t *top_border, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int mb_x, int mb_y, int mb_width, int simple, int xchg)
 
static av_always_inline int check_dc_pred8x8_mode (int mode, int mb_x, int mb_y)
 
static av_always_inline int check_tm_pred8x8_mode (int mode, int mb_x, int mb_y)
 
static av_always_inline int check_intra_pred8x8_mode (int mode, int mb_x, int mb_y)
 
static av_always_inline int check_intra_pred8x8_mode_emuedge (int mode, int mb_x, int mb_y)
 
static av_always_inline int check_tm_pred4x4_mode (int mode, int mb_x, int mb_y)
 
static av_always_inline int check_intra_pred4x4_mode_emuedge (int mode, int mb_x, int mb_y, int *copy_buf)
 
static av_always_inline void intra_predict (VP8Context *s, VP8ThreadData *td, uint8_t *dst[3], VP8Macroblock *mb, int mb_x, int mb_y)
 
static av_always_inline void vp8_mc_luma (VP8Context *s, VP8ThreadData *td, uint8_t *dst, ThreadFrame *ref, const VP56mv *mv, int x_off, int y_off, int block_w, int block_h, int width, int height, ptrdiff_t linesize, vp8_mc_func mc_func[3][3])
 luma MC function
 
static av_always_inline void vp8_mc_chroma (VP8Context *s, VP8ThreadData *td, uint8_t *dst1, uint8_t *dst2, ThreadFrame *ref, const VP56mv *mv, int x_off, int y_off, int block_w, int block_h, int width, int height, ptrdiff_t linesize, vp8_mc_func mc_func[3][3])
 chroma MC function
 
static av_always_inline void vp8_mc_part (VP8Context *s, VP8ThreadData *td, uint8_t *dst[3], ThreadFrame *ref_frame, int x_off, int y_off, int bx_off, int by_off, int block_w, int block_h, int width, int height, VP56mv *mv)
 
static av_always_inline void prefetch_motion (VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, int mb_xy, int ref)
 
static av_always_inline void inter_predict (VP8Context *s, VP8ThreadData *td, uint8_t *dst[3], VP8Macroblock *mb, int mb_x, int mb_y)
 Apply motion vectors to prediction buffer, chapter 18.
 
static av_always_inline void idct_mb (VP8Context *s, VP8ThreadData *td, uint8_t *dst[3], VP8Macroblock *mb)
 
static av_always_inline void filter_level_for_mb (VP8Context *s, VP8Macroblock *mb, VP8FilterStrength *f)
 
static av_always_inline void filter_mb (VP8Context *s, uint8_t *dst[3], VP8FilterStrength *f, int mb_x, int mb_y)
 
static av_always_inline void filter_mb_simple (VP8Context *s, uint8_t *dst, VP8FilterStrength *f, int mb_x, int mb_y)
 
static void vp8_decode_mv_mb_modes (AVCodecContext *avctx, VP8Frame *curframe, VP8Frame *prev_frame)
 
static void vp8_decode_mb_row_no_filter (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr)
 
static void vp8_filter_mb_row (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr)
 
static int vp8_decode_mb_row_sliced (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr)
 
int ff_vp8_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
 
av_cold int ff_vp8_decode_free (AVCodecContext *avctx)
 
static av_cold int vp8_init_frames (VP8Context *s)
 
av_cold int ff_vp8_decode_init (AVCodecContext *avctx)
 
static av_cold int vp8_decode_init_thread_copy (AVCodecContext *avctx)
 
static int vp8_decode_update_thread_context (AVCodecContext *dst, const AVCodecContext *src)
 
static unsigned apply_padding (unsigned size)
 
static int webp_decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
 

Variables

static const uint8_t subpel_idx [3][8]
 
AVCodec ff_vp8_decoder
 

Macro Definition Documentation

#define MV_EDGE_CHECK (   n)
Value:
{\
VP8Macroblock *edge = mb_edge[n];\
int edge_ref = edge->ref_frame;\
if (edge_ref != VP56_FRAME_CURRENT) {\
uint32_t mv = AV_RN32A(&edge->mv);\
if (mv) {\
if (cur_sign_bias != sign_bias[edge_ref]) {\
/* SWAR negate of the values in mv. */\
mv = ~mv;\
mv = ((mv&0x7fff7fff) + 0x00010001) ^ (mv&0x80008000);\
}\
if (!n || mv != AV_RN32A(&near_mv[idx]))\
AV_WN32A(&near_mv[++idx], mv);\
cnt[idx] += 1 + (n != 2);\
} else\
cnt[CNT_ZERO] += 1 + (n != 2);\
}\
}

Referenced by decode_mvs().

#define XCHG (   a,
  b,
  xchg 
)
Value:
do { \
if (xchg) AV_SWAP64(b,a); \
else AV_COPY64(b,a); \
} while (0)
#define MARGIN   (16 << 2)

Definition at line 1598 of file vp8.c.

Referenced by ff_vp8_decode_frame(), vp8_decode_mb_row_no_filter(), and vp8_decode_mv_mb_modes().

#define check_thread_pos (   td,
  otd,
  mb_x_check,
  mb_y_check 
)

Definition at line 1662 of file vp8.c.

Referenced by vp8_decode_mb_row_no_filter(), and vp8_filter_mb_row().

#define update_pos (   td,
  mb_y,
  mb_x 
)

Definition at line 1663 of file vp8.c.

Referenced by vp8_decode_mb_row_no_filter(), vp8_decode_mb_row_sliced(), and vp8_filter_mb_row().

#define REBASE (   pic)    pic ? pic - &s_src->frames[0] + &s->frames[0] : NULL

Definition at line 2073 of file vp8.c.

Referenced by vp8_decode_update_thread_context().

Function Documentation

static void free_buffers ( VP8Context *  s)
static

Definition at line 38 of file vp8.c.

Referenced by vp8_decode_flush_impl(), and vp8_decode_update_thread_context().

static int vp8_alloc_frame ( VP8Context *  s,
VP8Frame *  f,
int  ref 
)
static

Definition at line 58 of file vp8.c.

Referenced by ff_vp8_decode_frame().

static void vp8_release_frame ( VP8Context *  s,
VP8Frame *  f 
)
static

Definition at line 71 of file vp8.c.

Referenced by ff_vp8_decode_frame(), vp8_decode_flush_impl(), and vp8_ref_frame().

static int vp8_ref_frame ( VP8Context *  s,
VP8Frame *  dst,
VP8Frame *  src 
)
static

Definition at line 77 of file vp8.c.

Referenced by vp8_decode_update_thread_context().

static void vp8_decode_flush_impl ( AVCodecContext *  avctx,
int  free_mem 
)
static

Definition at line 95 of file vp8.c.

Referenced by ff_vp8_decode_free(), update_dimensions(), and vp8_decode_flush().

static void vp8_decode_flush ( AVCodecContext *  avctx)
static

Definition at line 108 of file vp8.c.

static int update_dimensions ( VP8Context *  s,
int  width,
int  height 
)
static

Definition at line 113 of file vp8.c.

Referenced by decode_frame_header().

static void parse_segment_info ( VP8Context *  s)
static

Definition at line 159 of file vp8.c.

Referenced by decode_frame_header().

static void update_lf_deltas ( VP8Context *  s)
static

Definition at line 180 of file vp8.c.

Referenced by decode_frame_header().

static int setup_partitions ( VP8Context *  s,
const uint8_t *  buf,
int  buf_size 
)
static

Definition at line 204 of file vp8.c.

Referenced by decode_frame_header().

static void get_quants ( VP8Context *  s)
static

Definition at line 230 of file vp8.c.

Referenced by decode_frame_header().

static VP56Frame ref_to_update ( VP8Context *  s,
int  update,
VP56Frame  ref 
)
static

Determine which buffers golden and altref should be updated with after this frame.

The spec isn't clear here, so I'm going by my understanding of what libvpx does

Intra frames update all 3 references Inter frames update VP56_FRAME_PREVIOUS if the update_last flag is set If the update (golden|altref) flag is set, it's updated with the current frame if update_last is set, and VP56_FRAME_PREVIOUS otherwise. If the flag is not set, the number read means: 0: no update 1: VP56_FRAME_PREVIOUS 2: update golden with altref, or update altref with golden

Definition at line 276 of file vp8.c.

Referenced by update_refs().

static void update_refs ( VP8Context *  s)
static

Definition at line 292 of file vp8.c.

Referenced by decode_frame_header().

static int decode_frame_header ( VP8Context *  s,
const uint8_t *  buf,
int  buf_size 
)
static

Definition at line 303 of file vp8.c.

Referenced by ff_vp8_decode_frame().

static av_always_inline void clamp_mv ( VP8Context *  s,
VP56mv *  dst,
const VP56mv *  src 
)
static

Definition at line 441 of file vp8.c.

Referenced by decode_mvs().

static int read_mv_component ( VP56RangeCoder *  c,
const uint8_t *  p 
)
static

Motion vector coding, 17.1.

Definition at line 450 of file vp8.c.

Referenced by decode_mvs(), and decode_splitmvs().

static av_always_inline const uint8_t* get_submv_prob ( uint32_t  left,
uint32_t  top 
)
static

Definition at line 479 of file vp8.c.

Referenced by decode_splitmvs().

static av_always_inline int decode_splitmvs ( VP8Context *  s,
VP56RangeCoder *  c,
VP8Macroblock *  mb,
int  layout 
)
static

Split motion vector prediction, 16.4.

Returns
the number of motion vectors parsed (2, 4 or 16)

Definition at line 493 of file vp8.c.

Referenced by decode_mvs().

static av_always_inline void decode_mvs ( VP8Context *  s,
VP8Macroblock *  mb,
int  mb_x,
int  mb_y,
int  layout 
)
static

Definition at line 564 of file vp8.c.

Referenced by decode_mb_mode().

static av_always_inline void decode_intra4x4_modes ( VP8Context *  s,
VP56RangeCoder *  c,
VP8Macroblock *  mb,
int  mb_x,
int  keyframe,
int  layout 
)
static

Definition at line 663 of file vp8.c.

Referenced by decode_mb_mode().

static av_always_inline void decode_mb_mode ( VP8Context *  s,
VP8Macroblock *  mb,
int  mb_x,
int  mb_y,
uint8_t *  segment,
uint8_t *  ref,
int  layout 
)
static

Definition at line 697 of file vp8.c.

Referenced by vp8_decode_mb_row_no_filter(), and vp8_decode_mv_mb_modes().

static int decode_block_coeffs_internal ( VP56RangeCoder *  r,
int16_t  block[16],
uint8_t  probs[16][3][NUM_DCT_TOKENS-1],
int  i,
uint8_t *  token_prob,
int16_t  qmul[2] 
)
static
Parameters
rarithmetic bitstream reader context
blockdestination for block coefficients
probsprobabilities to use when reading trees from the bitstream
iinitial coeff index, 0 unless a separate DC block is coded
qmularray holding the dc/ac dequant factor at position 0/1
Returns
0 if no coeffs were decoded otherwise, the index of the last coeff decoded plus one

Definition at line 762 of file vp8.c.

Referenced by decode_block_coeffs().

static av_always_inline int decode_block_coeffs ( VP56RangeCoder *  c,
int16_t  block[16],
uint8_t  probs[16][3][NUM_DCT_TOKENS-1],
int  i,
int  zero_nhood,
int16_t  qmul[2] 
)
static
Parameters
carithmetic bitstream reader context
blockdestination for block coefficients
probsprobabilities to use when reading trees from the bitstream
iinitial coeff index, 0 unless a separate DC block is coded
zero_nhoodthe initial prediction context for number of surrounding all-zero blocks (only left/top, so 0-2)
qmularray holding the dc/ac dequant factor at position 0/1
Returns
0 if no coeffs were decoded otherwise, the index of the last coeff decoded plus one

Definition at line 830 of file vp8.c.

Referenced by decode_mb_coeffs().

static av_always_inline void decode_mb_coeffs ( VP8Context *  s,
VP8ThreadData *  td,
VP56RangeCoder *  c,
VP8Macroblock *  mb,
uint8_t  t_nnz[9],
uint8_t  l_nnz[9] 
)
static

Definition at line 841 of file vp8.c.

Referenced by vp8_decode_mb_row_no_filter().

static av_always_inline void backup_mb_border ( uint8_t *  top_border,
uint8_t *  src_y,
uint8_t *  src_cb,
uint8_t *  src_cr,
int  linesize,
int  uvlinesize,
int  simple 
)
static

Definition at line 902 of file vp8.c.

Referenced by vp8_decode_mb_row_no_filter(), and vp8_filter_mb_row().

static av_always_inline void xchg_mb_border ( uint8_t *  top_border,
uint8_t *  src_y,
uint8_t *  src_cb,
uint8_t *  src_cr,
int  linesize,
int  uvlinesize,
int  mb_x,
int  mb_y,
int  mb_width,
int  simple,
int  xchg 
)
static

Definition at line 913 of file vp8.c.

Referenced by intra_predict().

static av_always_inline int check_dc_pred8x8_mode ( int  mode,
int  mb_x,
int  mb_y 
)
static

Definition at line 944 of file vp8.c.

Referenced by check_intra_pred8x8_mode(), and check_intra_pred8x8_mode_emuedge().

static av_always_inline int check_tm_pred8x8_mode ( int  mode,
int  mb_x,
int  mb_y 
)
static

Definition at line 954 of file vp8.c.

Referenced by check_intra_pred8x8_mode_emuedge().

static av_always_inline int check_intra_pred8x8_mode ( int  mode,
int  mb_x,
int  mb_y 
)
static

Definition at line 964 of file vp8.c.

Referenced by intra_predict().

static av_always_inline int check_intra_pred8x8_mode_emuedge ( int  mode,
int  mb_x,
int  mb_y 
)
static

Definition at line 974 of file vp8.c.

Referenced by intra_predict().

static av_always_inline int check_tm_pred4x4_mode ( int  mode,
int  mb_x,
int  mb_y 
)
static

Definition at line 990 of file vp8.c.

Referenced by check_intra_pred4x4_mode_emuedge().

static av_always_inline int check_intra_pred4x4_mode_emuedge ( int  mode,
int  mb_x,
int  mb_y,
int *  copy_buf 
)
static

Definition at line 1000 of file vp8.c.

Referenced by intra_predict().

static av_always_inline void intra_predict ( VP8Context *  s,
VP8ThreadData *  td,
uint8_t *  dst[3],
VP8Macroblock *  mb,
int  mb_x,
int  mb_y 
)
static

Definition at line 1034 of file vp8.c.

Referenced by vp8_decode_mb_row_no_filter().

static av_always_inline void vp8_mc_luma ( VP8Context *  s,
VP8ThreadData *  td,
uint8_t *  dst,
ThreadFrame *  ref,
const VP56mv *  mv,
int  x_off,
int  y_off,
int  block_w,
int  block_h,
int  width,
int  height,
ptrdiff_t  linesize,
vp8_mc_func  mc_func[3][3] 
)
static

luma MC function

Parameters
sVP8 decoding context
dsttarget buffer for block data at block position
refreference picture buffer at origin (0, 0)
mvmotion vector (relative to block position) to get pixel data from
x_offhorizontal position of block from origin (0, 0)
y_offvertical position of block from origin (0, 0)
block_wwidth of block (16, 8 or 4)
block_hheight of block (always same as block_w)
widthwidth of src/dst plane data
heightheight of src/dst plane data
linesizesize of a single line of plane data, including padding
mc_funcmotion compensation function pointers (bilinear or sixtap MC)

Definition at line 1179 of file vp8.c.

Referenced by inter_predict(), and vp8_mc_part().

static av_always_inline void vp8_mc_chroma ( VP8Context *  s,
VP8ThreadData *  td,
uint8_t *  dst1,
uint8_t *  dst2,
ThreadFrame *  ref,
const VP56mv *  mv,
int  x_off,
int  y_off,
int  block_w,
int  block_h,
int  width,
int  height,
ptrdiff_t  linesize,
vp8_mc_func  mc_func[3][3] 
)
static

chroma MC function

Parameters
sVP8 decoding context
dst1target buffer for block data at block position (U plane)
dst2target buffer for block data at block position (V plane)
refreference picture buffer at origin (0, 0)
mvmotion vector (relative to block position) to get pixel data from
x_offhorizontal position of block from origin (0, 0)
y_offvertical position of block from origin (0, 0)
block_wwidth of block (16, 8 or 4)
block_hheight of block (always same as block_w)
widthwidth of src/dst plane data
heightheight of src/dst plane data
linesizesize of a single line of plane data, including padding
mc_funcmotion compensation function pointers (bilinear or sixtap MC)

Definition at line 1233 of file vp8.c.

Referenced by inter_predict(), and vp8_mc_part().

static av_always_inline void vp8_mc_part ( VP8Context *  s,
VP8ThreadData *  td,
uint8_t *  dst[3],
ThreadFrame *  ref_frame,
int  x_off,
int  y_off,
int  bx_off,
int  by_off,
int  block_w,
int  block_h,
int  width,
int  height,
VP56mv *  mv 
)
static

Definition at line 1280 of file vp8.c.

Referenced by inter_predict().

static av_always_inline void prefetch_motion ( VP8Context *  s,
VP8Macroblock *  mb,
int  mb_x,
int  mb_y,
int  mb_xy,
int  ref 
)
static

Definition at line 1312 of file vp8.c.

Referenced by vp8_decode_mb_row_no_filter().

static av_always_inline void inter_predict ( VP8Context *  s,
VP8ThreadData *  td,
uint8_t *  dst[3],
VP8Macroblock *  mb,
int  mb_x,
int  mb_y 
)
static

Apply motion vectors to prediction buffer, chapter 18.

Definition at line 1334 of file vp8.c.

Referenced by vp8_decode_mb_row_no_filter().

static av_always_inline void idct_mb ( VP8Context *  s,
VP8ThreadData *  td,
uint8_t *  dst[3],
VP8Macroblock *  mb 
)
static

Definition at line 1414 of file vp8.c.

Referenced by vp8_decode_mb_row_no_filter().

static av_always_inline void filter_level_for_mb ( VP8Context *  s,
VP8Macroblock *  mb,
VP8FilterStrength *  f 
)
static

Definition at line 1467 of file vp8.c.

Referenced by vp8_decode_mb_row_no_filter().

static av_always_inline void filter_mb ( VP8Context *  s,
uint8_t *  dst[3],
VP8FilterStrength *  f,
int  mb_x,
int  mb_y 
)
static

Definition at line 1497 of file vp8.c.

Referenced by vp8_filter_mb_row().

static av_always_inline void filter_mb_simple ( VP8Context *  s,
uint8_t *  dst,
VP8FilterStrength *  f,
int  mb_x,
int  mb_y 
)
static

Definition at line 1567 of file vp8.c.

Referenced by vp8_filter_mb_row().

static void vp8_decode_mv_mb_modes ( AVCodecContext *  avctx,
VP8Frame *  curframe,
VP8Frame *  prev_frame 
)
static

Definition at line 1599 of file vp8.c.

Referenced by ff_vp8_decode_frame().

static void vp8_decode_mb_row_no_filter ( AVCodecContext *  avctx,
void *  tdata,
int  jobnr,
int  threadnr 
)
static

Definition at line 1666 of file vp8.c.

Referenced by vp8_decode_mb_row_sliced().

static void vp8_filter_mb_row ( AVCodecContext *  avctx,
void *  tdata,
int  jobnr,
int  threadnr 
)
static

Definition at line 1782 of file vp8.c.

Referenced by vp8_decode_mb_row_sliced().

static int vp8_decode_mb_row_sliced ( AVCodecContext *  avctx,
void *  tdata,
int  jobnr,
int  threadnr 
)
static

Definition at line 1836 of file vp8.c.

Referenced by ff_vp8_decode_frame().

int ff_vp8_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  got_frame,
AVPacket *  avpkt 
)

Definition at line 1863 of file vp8.c.

Referenced by vp8_lossy_decode_frame(), and webp_decode_frame().

av_cold int ff_vp8_decode_free ( AVCodecContext *  avctx)

Definition at line 2014 of file vp8.c.

Referenced by ff_vp8_decode_init(), vp8_decode_init_thread_copy(), and webp_decode_close().

static av_cold int vp8_init_frames ( VP8Context *  s)
static

Definition at line 2026 of file vp8.c.

Referenced by ff_vp8_decode_init(), and vp8_decode_init_thread_copy().

av_cold int ff_vp8_decode_init ( AVCodecContext *  avctx)

Definition at line 2037 of file vp8.c.

Referenced by vp8_lossy_decode_frame().

static av_cold int vp8_decode_init_thread_copy ( AVCodecContext *  avctx)
static

Definition at line 2058 of file vp8.c.

static int vp8_decode_update_thread_context ( AVCodecContext *  dst,
const AVCodecContext *  src 
)
static

Definition at line 2076 of file vp8.c.

static unsigned apply_padding ( unsigned  size)
static

Definition at line 2109 of file vp8.c.

Referenced by webp_decode_frame().

static int webp_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  data_size,
AVPacket *  avpkt 
)
static

Definition at line 2111 of file vp8.c.

Variable Documentation

const uint8_t subpel_idx[3][8]
static
Initial value:
= {
{ 0, 1, 2, 1, 2, 1, 2, 1 },
{ 0, 3, 5, 3, 5, 3, 5, 3 },
{ 0, 2, 3, 2, 3, 2, 3, 2 },
}

Definition at line 1155 of file vp8.c.

Referenced by vp8_mc_chroma(), and vp8_mc_luma().

AVCodec ff_vp8_decoder
Initial value:
= {
.name = "vp8",
.long_name = NULL_IF_CONFIG_SMALL("On2 VP8"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VP8,
.priv_data_size = sizeof(VP8Context),
.init = ff_vp8_decode_init,
.close = ff_vp8_decode_free,
.decode = ff_vp8_decode_frame,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS | CODEC_CAP_SLICE_THREADS,
.flush = vp8_decode_flush,
.init_thread_copy = ONLY_IF_THREADS_ENABLED(vp8_decode_init_thread_copy),
.update_thread_context = ONLY_IF_THREADS_ENABLED(vp8_decode_update_thread_context),
}

Definition at line 2155 of file vp8.c.

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