FFmpeg
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vp8.c File Reference
#include "config_components.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "hwaccel_internal.h"
#include "hwconfig.h"
#include "mathops.h"
#include "progressframe.h"
#include "refstruct.h"
#include "thread.h"
#include "vp8.h"
#include "vp89_rac.h"
#include "vp8data.h"
#include "vpx_rac.h"

Go to the source code of this file.

Macros

#define VP7_MVC_SIZE   17
 
#define VP8_MVC_SIZE   19
 
#define MV_EDGE_CHECK(n)
 
#define XCHG(a, b, xchg)
 
#define H_LOOP_FILTER_16Y_INNER(cond)
 
#define MARGIN   (16 << 2)
 
#define check_thread_pos(td, otd, mb_x_check, mb_y_check)   while(0)
 
#define update_pos(td, mb_y, mb_x)   while(0)
 

Functions

static int vp8_rac_get_sint (VPXRangeCoder *c, int bits)
 
static int vp8_rac_get_nn (VPXRangeCoder *c)
 
static int vp8_rac_get_coeff (VPXRangeCoder *c, const uint8_t *prob)
 
static void free_buffers (VP8Context *s)
 
static int vp8_alloc_frame (VP8Context *s, VP8Frame *f, int ref)
 
static void vp8_release_frame (VP8Frame *f)
 
static av_cold void vp8_decode_flush_impl (AVCodecContext *avctx, int free_mem)
 
static av_cold void vp8_decode_flush (AVCodecContext *avctx)
 
static VP8Framevp8_find_free_buffer (VP8Context *s)
 
static enum AVPixelFormat get_pixel_format (VP8Context *s)
 
static av_always_inline int update_dimensions (VP8Context *s, int width, int height, int is_vp7)
 
static int vp7_update_dimensions (VP8Context *s, int width, int height)
 
static int vp8_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 vp7_get_quants (VP8Context *s)
 
static void vp8_get_quants (VP8Context *s)
 
static VP8FrameType ref_to_update (VP8Context *s, int update, VP8FrameType ref)
 Determine which buffers golden and altref should be updated with after this frame. More...
 
static void vp78_reset_probability_tables (VP8Context *s)
 
static void vp78_update_probability_tables (VP8Context *s)
 
static void vp78_update_pred16x16_pred8x8_mvc_probabilities (VP8Context *s, int mvc_size)
 
static void update_refs (VP8Context *s)
 
static void copy_chroma (AVFrame *dst, const AVFrame *src, int width, int height)
 
static void fade (uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, int width, int height, int alpha, int beta)
 
static int vp7_fade_frame (VP8Context *s, int alpha, int beta)
 
static int vp7_decode_frame_header (VP8Context *s, const uint8_t *buf, int buf_size)
 
static int vp8_decode_frame_header (VP8Context *s, const uint8_t *buf, int buf_size)
 
static av_always_inline void clamp_mv (const VP8mvbounds *s, VP8mv *dst, const VP8mv *src)
 
static av_always_inline int read_mv_component (VPXRangeCoder *c, const uint8_t *p, int vp7)
 Motion vector coding, 17.1. More...
 
static int vp7_read_mv_component (VPXRangeCoder *c, const uint8_t *p)
 
static int vp8_read_mv_component (VPXRangeCoder *c, const uint8_t *p)
 
static const av_always_inline uint8_t * get_submv_prob (uint32_t left, uint32_t top, int is_vp7)
 
static av_always_inline int decode_splitmvs (const VP8Context *s, VPXRangeCoder *c, VP8Macroblock *mb, int layout, int is_vp7)
 Split motion vector prediction, 16.4. More...
 
static int vp7_calculate_mb_offset (int mb_x, int mb_y, int mb_width, int xoffset, int yoffset, int boundary, int *edge_x, int *edge_y)
 The vp7 reference decoder uses a padding macroblock column (added to right edge of the frame) to guard against illegal macroblock offsets. More...
 
static const VP8mvget_bmv_ptr (const VP8Macroblock *mb, int subblock)
 
static av_always_inline void vp7_decode_mvs (VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, int layout)
 
static av_always_inline void vp8_decode_mvs (VP8Context *s, const VP8mvbounds *mv_bounds, VP8Macroblock *mb, int mb_x, int mb_y, int layout)
 
static av_always_inline void decode_intra4x4_modes (VP8Context *s, VPXRangeCoder *c, VP8Macroblock *mb, int mb_x, int keyframe, int layout)
 
static av_always_inline void decode_mb_mode (VP8Context *s, const VP8mvbounds *mv_bounds, VP8Macroblock *mb, int mb_x, int mb_y, uint8_t *segment, const uint8_t *ref, int layout, int is_vp7)
 
static av_always_inline int decode_block_coeffs_internal (VPXRangeCoder *r, int16_t block[16], uint8_t probs[16][3][NUM_DCT_TOKENS - 1], int i, const uint8_t *token_prob, const int16_t qmul[2], const uint8_t scan[16], int vp7)
 
static av_always_inline int inter_predict_dc (int16_t block[16], int16_t pred[2])
 
static int vp7_decode_block_coeffs_internal (VPXRangeCoder *r, int16_t block[16], uint8_t probs[16][3][NUM_DCT_TOKENS - 1], int i, const uint8_t *token_prob, const int16_t qmul[2], const uint8_t scan[16])
 
static int vp8_decode_block_coeffs_internal (VPXRangeCoder *r, int16_t block[16], uint8_t probs[16][3][NUM_DCT_TOKENS - 1], int i, const uint8_t *token_prob, const int16_t qmul[2])
 
static av_always_inline int decode_block_coeffs (VPXRangeCoder *c, int16_t block[16], uint8_t probs[16][3][NUM_DCT_TOKENS - 1], int i, int zero_nhood, const int16_t qmul[2], const uint8_t scan[16], int vp7)
 
static av_always_inline void decode_mb_coeffs (VP8Context *s, VP8ThreadData *td, VPXRangeCoder *c, VP8Macroblock *mb, uint8_t t_nnz[9], uint8_t l_nnz[9], int is_vp7)
 
static av_always_inline void backup_mb_border (uint8_t *top_border, const uint8_t *src_y, const uint8_t *src_cb, const uint8_t *src_cr, ptrdiff_t linesize, ptrdiff_t 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, ptrdiff_t linesize, ptrdiff_t 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, int vp7)
 
static av_always_inline int check_intra_pred8x8_mode_emuedge (int mode, int mb_x, int mb_y, int vp7)
 
static av_always_inline int check_tm_pred4x4_mode (int mode, int mb_x, int mb_y, int vp7)
 
static av_always_inline int check_intra_pred4x4_mode_emuedge (int mode, int mb_x, int mb_y, int *copy_buf, int vp7)
 
static av_always_inline void intra_predict (VP8Context *s, VP8ThreadData *td, uint8_t *const dst[3], VP8Macroblock *mb, int mb_x, int mb_y, int is_vp7)
 
static av_always_inline void vp8_mc_luma (VP8Context *s, VP8ThreadData *td, uint8_t *dst, const ProgressFrame *ref, const VP8mv *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 More...
 
static av_always_inline void vp8_mc_chroma (VP8Context *s, VP8ThreadData *td, uint8_t *dst1, uint8_t *dst2, const ProgressFrame *ref, const VP8mv *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 More...
 
static av_always_inline void vp8_mc_part (VP8Context *s, VP8ThreadData *td, uint8_t *const dst[3], const ProgressFrame *ref_frame, int x_off, int y_off, int bx_off, int by_off, int block_w, int block_h, int width, int height, const VP8mv *mv)
 
static av_always_inline void prefetch_motion (const VP8Context *s, const 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 *const dst[3], VP8Macroblock *mb, int mb_x, int mb_y)
 Apply motion vectors to prediction buffer, chapter 18. More...
 
static av_always_inline void idct_mb (VP8Context *s, VP8ThreadData *td, uint8_t *const dst[3], const VP8Macroblock *mb)
 
static av_always_inline void filter_level_for_mb (const VP8Context *s, const VP8Macroblock *mb, VP8FilterStrength *f, int is_vp7)
 
static av_always_inline void filter_mb (const VP8Context *s, uint8_t *const dst[3], const VP8FilterStrength *f, int mb_x, int mb_y, int is_vp7)
 
static av_always_inline void filter_mb_simple (const VP8Context *s, uint8_t *dst, const VP8FilterStrength *f, int mb_x, int mb_y)
 
static av_always_inline int vp78_decode_mv_mb_modes (AVCodecContext *avctx, VP8Frame *curframe, const VP8Frame *prev_frame, int is_vp7)
 
static int vp7_decode_mv_mb_modes (AVCodecContext *avctx, VP8Frame *cur_frame, const VP8Frame *prev_frame)
 
static int vp8_decode_mv_mb_modes (AVCodecContext *avctx, VP8Frame *cur_frame, const VP8Frame *prev_frame)
 
static av_always_inline int decode_mb_row_no_filter (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr, int is_vp7)
 
static int vp7_decode_mb_row_no_filter (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr)
 
static int vp8_decode_mb_row_no_filter (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr)
 
static av_always_inline void filter_mb_row (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr, int is_vp7)
 
static void vp7_filter_mb_row (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr)
 
static void vp8_filter_mb_row (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr)
 
static av_always_inline int vp78_decode_mb_row_sliced (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr, int is_vp7)
 
static int vp7_decode_mb_row_sliced (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr)
 
static int vp8_decode_mb_row_sliced (AVCodecContext *avctx, void *tdata, int jobnr, int threadnr)
 
static av_always_inline int vp78_decode_frame (AVCodecContext *avctx, AVFrame *rframe, int *got_frame, const AVPacket *avpkt, int is_vp7)
 
int ff_vp8_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
 
av_cold int ff_vp8_decode_free (AVCodecContext *avctx)
 
static av_always_inline int vp78_decode_init (AVCodecContext *avctx, int is_vp7)
 
av_cold int ff_vp8_decode_init (AVCodecContext *avctx)
 

Variables

static const uint8_t subpel_idx [3][8]
 

Macro Definition Documentation

◆ VP7_MVC_SIZE

#define VP7_MVC_SIZE   17

Definition at line 462 of file vp8.c.

◆ VP8_MVC_SIZE

#define VP8_MVC_SIZE   19

Definition at line 463 of file vp8.c.

◆ MV_EDGE_CHECK

#define MV_EDGE_CHECK (   n)
Value:
{ \
const VP8Macroblock *edge = mb_edge[n]; \
int edge_ref = edge->ref_frame; \
if (edge_ref != VP8_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); \
} \
}

◆ XCHG

#define XCHG (   a,
  b,
  xchg 
)
Value:
do { \
if (xchg) \
AV_SWAP64(b, a); \
} while (0)

◆ H_LOOP_FILTER_16Y_INNER

#define H_LOOP_FILTER_16Y_INNER (   cond)
Value:
if (cond && inner_filter) { \
s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0] + 4, linesize, \
bedge_lim_y, inner_limit, \
hev_thresh); \
s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0] + 8, linesize, \
bedge_lim_y, inner_limit, \
hev_thresh); \
s->vp8dsp.vp8_h_loop_filter16y_inner(dst[0] + 12, linesize, \
bedge_lim_y, inner_limit, \
hev_thresh); \
s->vp8dsp.vp8_h_loop_filter8uv_inner(dst[1] + 4, dst[2] + 4, \
uvlinesize, bedge_lim_uv, \
inner_limit, hev_thresh); \
}

◆ MARGIN

#define MARGIN   (16 << 2)

Definition at line 2293 of file vp8.c.

◆ check_thread_pos

#define check_thread_pos (   td,
  otd,
  mb_x_check,
  mb_y_check 
)    while(0)

Definition at line 2378 of file vp8.c.

◆ update_pos

#define update_pos (   td,
  mb_y,
  mb_x 
)    while(0)

Definition at line 2379 of file vp8.c.

Function Documentation

◆ vp8_rac_get_sint()

static int vp8_rac_get_sint ( VPXRangeCoder c,
int  bits 
)
static

Definition at line 51 of file vp8.c.

Referenced by parse_segment_info(), and vp8_get_quants().

◆ vp8_rac_get_nn()

static int vp8_rac_get_nn ( VPXRangeCoder c)
static

Definition at line 66 of file vp8.c.

Referenced by vp78_update_pred16x16_pred8x8_mvc_probabilities().

◆ vp8_rac_get_coeff()

static int vp8_rac_get_coeff ( VPXRangeCoder c,
const uint8_t *  prob 
)
static

Definition at line 73 of file vp8.c.

Referenced by decode_block_coeffs_internal().

◆ free_buffers()

static void free_buffers ( VP8Context s)
static

Definition at line 84 of file vp8.c.

Referenced by update_dimensions(), and vp8_decode_flush_impl().

◆ vp8_alloc_frame()

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

Definition at line 104 of file vp8.c.

Referenced by vp78_decode_frame(), and vp7_fade_frame().

◆ vp8_release_frame()

static void vp8_release_frame ( VP8Frame f)
static

Definition at line 127 of file vp8.c.

Referenced by vp78_decode_frame(), vp8_decode_flush_impl(), and vp8_find_free_buffer().

◆ vp8_decode_flush_impl()

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

Definition at line 134 of file vp8.c.

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

◆ vp8_decode_flush()

static av_cold void vp8_decode_flush ( AVCodecContext avctx)
static

Definition at line 150 of file vp8.c.

◆ vp8_find_free_buffer()

static VP8Frame* vp8_find_free_buffer ( VP8Context s)
static

Definition at line 155 of file vp8.c.

Referenced by vp78_decode_frame(), and vp7_fade_frame().

◆ get_pixel_format()

static enum AVPixelFormat get_pixel_format ( VP8Context s)
static

Definition at line 179 of file vp8.c.

Referenced by update_dimensions(), and vp78_decode_frame().

◆ update_dimensions()

static av_always_inline int update_dimensions ( VP8Context s,
int  width,
int  height,
int  is_vp7 
)
static

Definition at line 196 of file vp8.c.

Referenced by vp7_update_dimensions(), and vp8_update_dimensions().

◆ vp7_update_dimensions()

static int vp7_update_dimensions ( VP8Context s,
int  width,
int  height 
)
static

Definition at line 268 of file vp8.c.

Referenced by vp7_decode_frame_header().

◆ vp8_update_dimensions()

static int vp8_update_dimensions ( VP8Context s,
int  width,
int  height 
)
static

Definition at line 273 of file vp8.c.

Referenced by vp8_decode_frame_header().

◆ parse_segment_info()

static void parse_segment_info ( VP8Context s)
static

Definition at line 279 of file vp8.c.

Referenced by vp8_decode_frame_header().

◆ update_lf_deltas()

static void update_lf_deltas ( VP8Context s)
static

Definition at line 301 of file vp8.c.

Referenced by vp8_decode_frame_header().

◆ setup_partitions()

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

Definition at line 325 of file vp8.c.

Referenced by vp8_decode_frame_header().

◆ vp7_get_quants()

static void vp7_get_quants ( VP8Context s)
static

Definition at line 356 of file vp8.c.

Referenced by vp7_decode_frame_header().

◆ vp8_get_quants()

static void vp8_get_quants ( VP8Context s)
static

Definition at line 375 of file vp8.c.

Referenced by vp8_decode_frame_header().

◆ ref_to_update()

static VP8FrameType ref_to_update ( VP8Context s,
int  update,
VP8FrameType  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 VP8_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 VP8_FRAME_PREVIOUS otherwise. If the flag is not set, the number read means: 0: no update 1: VP8_FRAME_PREVIOUS 2: update golden with altref, or update altref with golden

Definition at line 421 of file vp8.c.

Referenced by update_refs().

◆ vp78_reset_probability_tables()

static void vp78_reset_probability_tables ( VP8Context s)
static

Definition at line 437 of file vp8.c.

Referenced by vp7_decode_frame_header(), and vp8_decode_frame_header().

◆ vp78_update_probability_tables()

static void vp78_update_probability_tables ( VP8Context s)
static

Definition at line 446 of file vp8.c.

Referenced by vp7_decode_frame_header(), and vp8_decode_frame_header().

◆ vp78_update_pred16x16_pred8x8_mvc_probabilities()

static void vp78_update_pred16x16_pred8x8_mvc_probabilities ( VP8Context s,
int  mvc_size 
)
static

Definition at line 465 of file vp8.c.

Referenced by vp7_decode_frame_header(), and vp8_decode_frame_header().

◆ update_refs()

static void update_refs ( VP8Context s)
static

Definition at line 485 of file vp8.c.

Referenced by uncompressed_header(), and vp8_decode_frame_header().

◆ copy_chroma()

static void copy_chroma ( AVFrame dst,
const AVFrame src,
int  width,
int  height 
)
static

Definition at line 496 of file vp8.c.

Referenced by vp7_fade_frame().

◆ fade()

static void fade ( uint8_t *  dst,
ptrdiff_t  dst_linesize,
const uint8_t *  src,
ptrdiff_t  src_linesize,
int  width,
int  height,
int  alpha,
int  beta 
)
static

Definition at line 507 of file vp8.c.

Referenced by parse_time_sequence(), and vp7_fade_frame().

◆ vp7_fade_frame()

static int vp7_fade_frame ( VP8Context s,
int  alpha,
int  beta 
)
static

Definition at line 523 of file vp8.c.

Referenced by vp7_decode_frame_header().

◆ vp7_decode_frame_header()

static int vp7_decode_frame_header ( VP8Context s,
const uint8_t *  buf,
int  buf_size 
)
static

Definition at line 561 of file vp8.c.

Referenced by vp78_decode_frame().

◆ vp8_decode_frame_header()

static int vp8_decode_frame_header ( VP8Context s,
const uint8_t *  buf,
int  buf_size 
)
static

Definition at line 725 of file vp8.c.

Referenced by vp78_decode_frame().

◆ clamp_mv()

static av_always_inline void clamp_mv ( const VP8mvbounds s,
VP8mv dst,
const VP8mv src 
)
static

Definition at line 866 of file vp8.c.

Referenced by vp8_decode_mvs().

◆ read_mv_component()

static av_always_inline int read_mv_component ( VPXRangeCoder c,
const uint8_t *  p,
int  vp7 
)
static

Motion vector coding, 17.1.

Definition at line 877 of file vp8.c.

Referenced by decode_splitmvs(), vp7_read_mv_component(), and vp8_read_mv_component().

◆ vp7_read_mv_component()

static int vp7_read_mv_component ( VPXRangeCoder c,
const uint8_t *  p 
)
static

Definition at line 905 of file vp8.c.

Referenced by vp7_decode_mvs().

◆ vp8_read_mv_component()

static int vp8_read_mv_component ( VPXRangeCoder c,
const uint8_t *  p 
)
static

Definition at line 910 of file vp8.c.

Referenced by vp8_decode_mvs().

◆ get_submv_prob()

static const av_always_inline uint8_t* get_submv_prob ( uint32_t  left,
uint32_t  top,
int  is_vp7 
)
static

Definition at line 916 of file vp8.c.

Referenced by decode_splitmvs().

◆ decode_splitmvs()

static av_always_inline int decode_splitmvs ( const VP8Context s,
VPXRangeCoder c,
VP8Macroblock mb,
int  layout,
int  is_vp7 
)
static

Split motion vector prediction, 16.4.

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

Definition at line 933 of file vp8.c.

Referenced by vp7_decode_mvs(), and vp8_decode_mvs().

◆ vp7_calculate_mb_offset()

static int vp7_calculate_mb_offset ( int  mb_x,
int  mb_y,
int  mb_width,
int  xoffset,
int  yoffset,
int  boundary,
int edge_x,
int edge_y 
)
static

The vp7 reference decoder uses a padding macroblock column (added to right edge of the frame) to guard against illegal macroblock offsets.

The algorithm has bugs that permit offsets to straddle the padding column. This function replicates those bugs.

Parameters
[out]edge_xmacroblock x address
[out]edge_ymacroblock y address
Returns
macroblock offset legal (boolean)

Definition at line 1015 of file vp8.c.

Referenced by vp7_decode_mvs().

◆ get_bmv_ptr()

static const VP8mv* get_bmv_ptr ( const VP8Macroblock mb,
int  subblock 
)
static

Definition at line 1028 of file vp8.c.

Referenced by vp7_decode_mvs().

◆ vp7_decode_mvs()

static av_always_inline void vp7_decode_mvs ( VP8Context s,
VP8Macroblock mb,
int  mb_x,
int  mb_y,
int  layout 
)
static

Definition at line 1034 of file vp8.c.

Referenced by decode_mb_mode().

◆ vp8_decode_mvs()

static av_always_inline void vp8_decode_mvs ( VP8Context s,
const VP8mvbounds mv_bounds,
VP8Macroblock mb,
int  mb_x,
int  mb_y,
int  layout 
)
static

Definition at line 1124 of file vp8.c.

Referenced by decode_mb_mode().

◆ decode_intra4x4_modes()

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

Definition at line 1224 of file vp8.c.

Referenced by decode_mb_mode().

◆ decode_mb_mode()

static av_always_inline void decode_mb_mode ( VP8Context s,
const VP8mvbounds mv_bounds,
VP8Macroblock mb,
int  mb_x,
int  mb_y,
uint8_t *  segment,
const uint8_t *  ref,
int  layout,
int  is_vp7 
)
static

Definition at line 1259 of file vp8.c.

Referenced by decode_mb_row_no_filter(), and vp78_decode_mv_mb_modes().

◆ decode_block_coeffs_internal()

static av_always_inline int decode_block_coeffs_internal ( VPXRangeCoder r,
int16_t  block[16],
uint8_t  probs[16][3][NUM_DCT_TOKENS - 1],
int  i,
const uint8_t *  token_prob,
const int16_t  qmul[2],
const uint8_t  scan[16],
int  vp7 
)
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 1352 of file vp8.c.

Referenced by vp7_decode_block_coeffs_internal(), and vp8_decode_block_coeffs_internal().

◆ inter_predict_dc()

static av_always_inline int inter_predict_dc ( int16_t  block[16],
int16_t  pred[2] 
)
static

Definition at line 1412 of file vp8.c.

Referenced by decode_mb_coeffs().

◆ vp7_decode_block_coeffs_internal()

static int vp7_decode_block_coeffs_internal ( VPXRangeCoder r,
int16_t  block[16],
uint8_t  probs[16][3][NUM_DCT_TOKENS - 1],
int  i,
const uint8_t *  token_prob,
const int16_t  qmul[2],
const uint8_t  scan[16] 
)
static

Definition at line 1434 of file vp8.c.

Referenced by decode_block_coeffs().

◆ vp8_decode_block_coeffs_internal()

static int vp8_decode_block_coeffs_internal ( VPXRangeCoder r,
int16_t  block[16],
uint8_t  probs[16][3][NUM_DCT_TOKENS - 1],
int  i,
const uint8_t *  token_prob,
const int16_t  qmul[2] 
)
static

Definition at line 1446 of file vp8.c.

Referenced by decode_block_coeffs().

◆ decode_block_coeffs()

static av_always_inline int decode_block_coeffs ( VPXRangeCoder c,
int16_t  block[16],
uint8_t  probs[16][3][NUM_DCT_TOKENS - 1],
int  i,
int  zero_nhood,
const int16_t  qmul[2],
const uint8_t  scan[16],
int  vp7 
)
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
scanscan pattern (VP7 only)
Returns
0 if no coeffs were decoded otherwise, the index of the last coeff decoded plus one

Definition at line 1471 of file vp8.c.

Referenced by decode_mb_coeffs().

◆ decode_mb_coeffs()

static av_always_inline void decode_mb_coeffs ( VP8Context s,
VP8ThreadData td,
VPXRangeCoder c,
VP8Macroblock mb,
uint8_t  t_nnz[9],
uint8_t  l_nnz[9],
int  is_vp7 
)
static

Definition at line 1486 of file vp8.c.

Referenced by decode_mb_row_no_filter().

◆ backup_mb_border()

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

Definition at line 1561 of file vp8.c.

Referenced by decode_mb_row_no_filter(), and filter_mb_row().

◆ xchg_mb_border()

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

Definition at line 1573 of file vp8.c.

Referenced by intra_predict().

◆ check_dc_pred8x8_mode()

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

Definition at line 1607 of file vp8.c.

Referenced by check_intra_pred8x8_mode_emuedge().

◆ check_tm_pred8x8_mode()

static av_always_inline int check_tm_pred8x8_mode ( int  mode,
int  mb_x,
int  mb_y,
int  vp7 
)
static

Definition at line 1616 of file vp8.c.

Referenced by check_intra_pred8x8_mode_emuedge().

◆ check_intra_pred8x8_mode_emuedge()

static av_always_inline int check_intra_pred8x8_mode_emuedge ( int  mode,
int  mb_x,
int  mb_y,
int  vp7 
)
static

Definition at line 1625 of file vp8.c.

Referenced by intra_predict().

◆ check_tm_pred4x4_mode()

static av_always_inline int check_tm_pred4x4_mode ( int  mode,
int  mb_x,
int  mb_y,
int  vp7 
)
static

Definition at line 1641 of file vp8.c.

Referenced by check_intra_pred4x4_mode_emuedge().

◆ 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,
int  vp7 
)
static

Definition at line 1651 of file vp8.c.

Referenced by intra_predict().

◆ intra_predict()

static av_always_inline void intra_predict ( VP8Context s,
VP8ThreadData td,
uint8_t *const  dst[3],
VP8Macroblock mb,
int  mb_x,
int  mb_y,
int  is_vp7 
)
static

Definition at line 1687 of file vp8.c.

Referenced by decode_mb_row_no_filter().

◆ vp8_mc_luma()

static av_always_inline void vp8_mc_luma ( VP8Context s,
VP8ThreadData td,
uint8_t *  dst,
const ProgressFrame ref,
const VP8mv 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 1825 of file vp8.c.

Referenced by inter_predict(), and vp8_mc_part().

◆ vp8_mc_chroma()

static av_always_inline void vp8_mc_chroma ( VP8Context s,
VP8ThreadData td,
uint8_t *  dst1,
uint8_t *  dst2,
const ProgressFrame ref,
const VP8mv 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 1883 of file vp8.c.

Referenced by inter_predict(), and vp8_mc_part().

◆ vp8_mc_part()

static av_always_inline void vp8_mc_part ( VP8Context s,
VP8ThreadData td,
uint8_t *const  dst[3],
const ProgressFrame ref_frame,
int  x_off,
int  y_off,
int  bx_off,
int  by_off,
int  block_w,
int  block_h,
int  width,
int  height,
const VP8mv mv 
)
static

Definition at line 1933 of file vp8.c.

Referenced by inter_predict().

◆ prefetch_motion()

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

Definition at line 1971 of file vp8.c.

Referenced by decode_mb_row_no_filter().

◆ inter_predict()

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

Apply motion vectors to prediction buffer, chapter 18.

Definition at line 1994 of file vp8.c.

Referenced by decode_mb_row_no_filter().

◆ idct_mb()

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

Definition at line 2078 of file vp8.c.

Referenced by decode_mb_row_no_filter().

◆ filter_level_for_mb()

static av_always_inline void filter_level_for_mb ( const VP8Context s,
const VP8Macroblock mb,
VP8FilterStrength f,
int  is_vp7 
)
static

Definition at line 2141 of file vp8.c.

Referenced by decode_mb_row_no_filter().

◆ filter_mb()

static av_always_inline void filter_mb ( const VP8Context s,
uint8_t *const  dst[3],
const VP8FilterStrength f,
int  mb_x,
int  mb_y,
int  is_vp7 
)
static

Definition at line 2174 of file vp8.c.

Referenced by filter_mb_row().

◆ filter_mb_simple()

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

Definition at line 2261 of file vp8.c.

Referenced by filter_mb_row().

◆ vp78_decode_mv_mb_modes()

static av_always_inline int vp78_decode_mv_mb_modes ( AVCodecContext avctx,
VP8Frame curframe,
const VP8Frame prev_frame,
int  is_vp7 
)
static

Definition at line 2295 of file vp8.c.

Referenced by vp7_decode_mv_mb_modes(), and vp8_decode_mv_mb_modes().

◆ vp7_decode_mv_mb_modes()

static int vp7_decode_mv_mb_modes ( AVCodecContext avctx,
VP8Frame cur_frame,
const VP8Frame prev_frame 
)
static

Definition at line 2332 of file vp8.c.

Referenced by vp78_decode_frame().

◆ vp8_decode_mv_mb_modes()

static int vp8_decode_mv_mb_modes ( AVCodecContext avctx,
VP8Frame cur_frame,
const VP8Frame prev_frame 
)
static

Definition at line 2338 of file vp8.c.

Referenced by vp78_decode_frame().

◆ decode_mb_row_no_filter()

static av_always_inline int decode_mb_row_no_filter ( AVCodecContext avctx,
void *  tdata,
int  jobnr,
int  threadnr,
int  is_vp7 
)
static

Definition at line 2382 of file vp8.c.

Referenced by vp7_decode_mb_row_no_filter(), and vp8_decode_mb_row_no_filter().

◆ vp7_decode_mb_row_no_filter()

static int vp7_decode_mb_row_no_filter ( AVCodecContext avctx,
void *  tdata,
int  jobnr,
int  threadnr 
)
static

Definition at line 2515 of file vp8.c.

Referenced by vp78_decode_init().

◆ vp8_decode_mb_row_no_filter()

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

Definition at line 2521 of file vp8.c.

Referenced by vp78_decode_init().

◆ filter_mb_row()

static av_always_inline void filter_mb_row ( AVCodecContext avctx,
void *  tdata,
int  jobnr,
int  threadnr,
int  is_vp7 
)
static

Definition at line 2527 of file vp8.c.

Referenced by vp7_filter_mb_row(), and vp8_filter_mb_row().

◆ vp7_filter_mb_row()

static void vp7_filter_mb_row ( AVCodecContext avctx,
void *  tdata,
int  jobnr,
int  threadnr 
)
static

Definition at line 2586 of file vp8.c.

Referenced by vp78_decode_init().

◆ vp8_filter_mb_row()

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

Definition at line 2592 of file vp8.c.

Referenced by vp78_decode_init().

◆ vp78_decode_mb_row_sliced()

static av_always_inline int vp78_decode_mb_row_sliced ( AVCodecContext avctx,
void *  tdata,
int  jobnr,
int  threadnr,
int  is_vp7 
)
static

Definition at line 2599 of file vp8.c.

Referenced by vp7_decode_mb_row_sliced(), and vp8_decode_mb_row_sliced().

◆ vp7_decode_mb_row_sliced()

static int vp7_decode_mb_row_sliced ( AVCodecContext avctx,
void *  tdata,
int  jobnr,
int  threadnr 
)
static

Definition at line 2633 of file vp8.c.

Referenced by vp78_decode_frame().

◆ vp8_decode_mb_row_sliced()

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

Definition at line 2639 of file vp8.c.

Referenced by vp78_decode_frame().

◆ vp78_decode_frame()

static av_always_inline int vp78_decode_frame ( AVCodecContext avctx,
AVFrame rframe,
int got_frame,
const AVPacket avpkt,
int  is_vp7 
)
static

Definition at line 2646 of file vp8.c.

Referenced by ff_vp8_decode_frame().

◆ ff_vp8_decode_frame()

int ff_vp8_decode_frame ( AVCodecContext avctx,
AVFrame frame,
int got_frame,
AVPacket avpkt 
)

Definition at line 2840 of file vp8.c.

Referenced by vp8_lossy_decode_frame().

◆ ff_vp8_decode_free()

av_cold int ff_vp8_decode_free ( AVCodecContext avctx)

Definition at line 2854 of file vp8.c.

Referenced by webp_decode_close().

◆ vp78_decode_init()

static av_always_inline int vp78_decode_init ( AVCodecContext avctx,
int  is_vp7 
)
static

Definition at line 2862 of file vp8.c.

Referenced by ff_vp8_decode_init().

◆ ff_vp8_decode_init()

av_cold int ff_vp8_decode_init ( AVCodecContext avctx)

Definition at line 2898 of file vp8.c.

Referenced by vp8_lossy_decode_frame().

Variable Documentation

◆ subpel_idx

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 1801 of file vp8.c.

Referenced by vp8_mc_chroma(), and vp8_mc_luma().

VP8_FRAME_CURRENT
@ VP8_FRAME_CURRENT
Definition: vp8.h:45
mv
static const int8_t mv[256][2]
Definition: 4xm.c:81
b
#define b
Definition: input.c:41
AV_COPY64
#define AV_COPY64(d, s)
Definition: intreadwrite.h:601
VP8Macroblock::ref_frame
uint8_t ref_frame
Definition: vp8.h:101
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
VP8Macroblock
Definition: vp8.h:96
AV_RN32A
#define AV_RN32A(p)
Definition: intreadwrite.h:524
cond
int(* cond)(enum AVPixelFormat pix_fmt)
Definition: pixdesc_query.c:28