vp8.c File Reference

#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "internal.h"
#include "mathops.h"
#include "rectangle.h"
#include "thread.h"
#include "vp8.h"
#include "vp8data.h"

Go to the source code of this file.

Macros
#define	VPX(vp7, f)   vp8_ ## f
#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 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 void	vp8_decode_flush_impl (AVCodecContext *avctx, int free_mem)
static void	vp8_decode_flush (AVCodecContext *avctx)
static VP8Frame *	vp8_find_free_buffer (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 VP56Frame	ref_to_update (VP8Context *s, int update, VP56Frame 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, 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, VP56RangeCoder *c)
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 (VP8mvbounds *s, VP56mv *dst, const VP56mv *src)
static av_always_inline int	read_mv_component (VP56RangeCoder *c, const uint8_t *p, int vp7)
	Motion vector coding, 17.1. More...
static int	vp7_read_mv_component (VP56RangeCoder *c, const uint8_t *p)
static int	vp8_read_mv_component (VP56RangeCoder *c, const uint8_t *p)
static av_always_inline const uint8_t *	get_submv_prob (uint32_t left, uint32_t top, int is_vp7)
static av_always_inline int	decode_splitmvs (VP8Context *s, VP56RangeCoder *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 VP56mv *	get_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, VP8mvbounds *mv_bounds, 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, VP8mvbounds *mv_bounds, VP8Macroblock *mb, int mb_x, int mb_y, uint8_t *segment, uint8_t *ref, int layout, int is_vp7)
static av_always_inline 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], 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 (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], const uint8_t scan[16])
static int	vp8_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], const uint8_t scan[16], int vp7)
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], int is_vp7)
static av_always_inline void	backup_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 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 *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, 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 More...
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 More...
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. More...
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, int is_vp7)
static av_always_inline void	filter_mb (VP8Context *s, uint8_t *dst[3], VP8FilterStrength *f, int mb_x, int mb_y, int is_vp7)
static av_always_inline void	filter_mb_simple (VP8Context *s, uint8_t *dst, VP8FilterStrength *f, int mb_x, int mb_y)
static av_always_inline void	vp78_decode_mv_mb_modes (AVCodecContext *avctx, VP8Frame *curframe, VP8Frame *prev_frame, int is_vp7)
static void	vp7_decode_mv_mb_modes (AVCodecContext *avctx, VP8Frame *cur_frame, VP8Frame *prev_frame)
static void	vp8_decode_mv_mb_modes (AVCodecContext *avctx, VP8Frame *cur_frame, 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, void *data, int *got_frame, AVPacket *avpkt, int is_vp7)
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)
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

#define VPX	(		vp7,
			f
	)		vp8_ ## f

Definition at line 46 of file vp8.c.

#define VP7_MVC_SIZE   17

Definition at line 393 of file vp8.c.

Referenced by vp7_decode_frame_header().

#define VP8_MVC_SIZE   19

Definition at line 394 of file vp8.c.

Referenced by vp8_decode_frame_header().

#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 vp8_decode_mvs().

#define XCHG	(		a,
			b,
			xchg
	)

Value:

do {                                                                      \
        if (xchg)                                                             \
            AV_SWAP64(b, a);                                                  \
        else                                                                  \
            AV_COPY64(b, a);                                                  \
    } while (0)

Referenced by xchg_mb_border().

#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);        \
    }

Referenced by filter_mb().

#define MARGIN   (16 << 2)

Definition at line 2201 of file vp8.c.

Referenced by decode_mb_row_no_filter(), vp78_decode_frame(), vp78_decode_mb_row_sliced(), and vp78_decode_mv_mb_modes().

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

Definition at line 2281 of file vp8.c.

Referenced by decode_mb_row_no_filter(), and filter_mb_row().

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

Definition at line 2282 of file vp8.c.

Referenced by decode_mb_row_no_filter(), filter_mb_row(), and vp78_decode_mb_row_sliced().

Function Documentation

static void free_buffers ( VP8Context *  s )

static

Definition at line 49 of file vp8.c.

Referenced by update_dimensions(), and vp8_decode_flush_impl().

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

static

Definition at line 69 of file vp8.c.

Referenced by vp78_decode_frame(), and vp7_fade_frame().

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

static

Definition at line 82 of file vp8.c.

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

static void vp8_decode_flush_impl ( AVCodecContext *  avctx, int  free_mem  )

static

Definition at line 107 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 120 of file vp8.c.

static VP8Frame* vp8_find_free_buffer ( VP8Context *  s )

static

Definition at line 125 of file vp8.c.

Referenced by vp78_decode_frame(), and vp7_fade_frame().

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

static

Definition at line 150 of file vp8.c.

Referenced by vp7_update_dimensions(), and vp8_update_dimensions().

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

static

Definition at line 204 of file vp8.c.

Referenced by vp7_decode_frame_header().

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

static

Definition at line 209 of file vp8.c.

Referenced by vp8_decode_frame_header().

static void parse_segment_info ( VP8Context *  s )

static

Definition at line 215 of file vp8.c.

Referenced by vp8_decode_frame_header().

static void update_lf_deltas ( VP8Context *  s )

static

Definition at line 236 of file vp8.c.

Referenced by vp8_decode_frame_header().

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

static

Definition at line 260 of file vp8.c.

Referenced by vp8_decode_frame_header().

static void vp7_get_quants ( VP8Context *  s )

static

Definition at line 287 of file vp8.c.

Referenced by vp7_decode_frame_header().

static void vp8_get_quants ( VP8Context *  s )

static

Definition at line 306 of file vp8.c.

Referenced by vp8_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 352 of file vp8.c.

Referenced by update_refs().

static void vp78_reset_probability_tables ( VP8Context *  s )

static

Definition at line 368 of file vp8.c.

Referenced by vp7_decode_frame_header(), and vp8_decode_frame_header().

static void vp78_update_probability_tables ( VP8Context *  s )

static

Definition at line 377 of file vp8.c.

Referenced by vp7_decode_frame_header(), and vp8_decode_frame_header().

static void vp78_update_pred16x16_pred8x8_mvc_probabilities ( VP8Context *  s, int  mvc_size  )

static

Definition at line 396 of file vp8.c.

Referenced by vp7_decode_frame_header(), and vp8_decode_frame_header().

static void update_refs ( VP8Context *  s )

static

Definition at line 416 of file vp8.c.

Referenced by vp8_decode_frame_header().

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

static

Definition at line 427 of file vp8.c.

Referenced by vp7_fade_frame().

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 438 of file vp8.c.

Referenced by parse_time_sequence(), register_all(), and vp7_fade_frame().

static int vp7_fade_frame ( VP8Context *  s, VP56RangeCoder *  c  )

static

Definition at line 452 of file vp8.c.

Referenced by vp7_decode_frame_header().

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

static

Definition at line 491 of file vp8.c.

Referenced by vp78_decode_frame().

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

static

Definition at line 645 of file vp8.c.

Referenced by vp78_decode_frame().

static av_always_inline void clamp_mv ( VP8mvbounds *  s, VP56mv *  dst, const VP56mv *  src  )

static

Definition at line 775 of file vp8.c.

Referenced by vp8_decode_mvs().

static av_always_inline int read_mv_component ( VP56RangeCoder *  c, const uint8_t *  p, int  vp7  )

static

Motion vector coding, 17.1.

Definition at line 786 of file vp8.c.

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

static int vp7_read_mv_component ( VP56RangeCoder *  c, const uint8_t *  p  )

static

Definition at line 814 of file vp8.c.

Referenced by vp7_decode_mvs().

static int vp8_read_mv_component ( VP56RangeCoder *  c, const uint8_t *  p  )

static

Definition at line 819 of file vp8.c.

Referenced by vp8_decode_mvs().

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

static

Definition at line 825 of file vp8.c.

Referenced by decode_splitmvs().

static av_always_inline int decode_splitmvs ( VP8Context *  s, VP56RangeCoder *  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 842 of file vp8.c.

Referenced by vp7_decode_mvs(), and vp8_decode_mvs().

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_x	macroblock x address
[out]	edge_y	macroblock y address

Returns

macroblock offset legal (boolean)

Definition at line 924 of file vp8.c.

Referenced by vp7_decode_mvs().

static const VP56mv* get_bmv_ptr ( const VP8Macroblock *  mb, int  subblock  )

static

Definition at line 937 of file vp8.c.

Referenced by 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 943 of file vp8.c.

Referenced by decode_mb_mode().

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

static

Definition at line 1034 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 1134 of file vp8.c.

Referenced by decode_mb_mode().

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

static

Definition at line 1169 of file vp8.c.

Referenced by decode_mb_row_no_filter(), and vp78_decode_mv_mb_modes().

static av_always_inline 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], const uint8_t  scan[16], int  vp7  )

static

Parameters

r	arithmetic bitstream reader context
block	destination for block coefficients
probs	probabilities to use when reading trees from the bitstream
i	initial coeff index, 0 unless a separate DC block is coded
qmul	array 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 1261 of file vp8.c.

Referenced by vp7_decode_block_coeffs_internal(), and vp8_decode_block_coeffs_internal().

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

static

Definition at line 1321 of file vp8.c.

Referenced by decode_mb_coeffs().

static int vp7_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], const uint8_t  scan[16]  )

static

Definition at line 1343 of file vp8.c.

Referenced by decode_block_coeffs().

static int vp8_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

Definition at line 1355 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], const uint8_t  scan[16], int  vp7  )

static

Parameters

c	arithmetic bitstream reader context
block	destination for block coefficients
probs	probabilities to use when reading trees from the bitstream
i	initial coeff index, 0 unless a separate DC block is coded
zero_nhood	the initial prediction context for number of surrounding all-zero blocks (only left/top, so 0-2)
qmul	array holding the dc/ac dequant factor at position 0/1
scan	scan pattern (VP7 only)

Returns

0 if no coeffs were decoded otherwise, the index of the last coeff decoded plus one

Definition at line 1380 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], int  is_vp7  )

static

Definition at line 1395 of file vp8.c.

Referenced by 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, ptrdiff_t  linesize, ptrdiff_t  uvlinesize, int  simple  )

static

Definition at line 1470 of file vp8.c.

Referenced by decode_mb_row_no_filter(), and 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, ptrdiff_t  linesize, ptrdiff_t  uvlinesize, int  mb_x, int  mb_y, int  mb_width, int  simple, int  xchg  )

static

Definition at line 1482 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 1516 of file vp8.c.

Referenced by check_intra_pred8x8_mode_emuedge().

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

static

Definition at line 1525 of file vp8.c.

Referenced by 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 1534 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, int  vp7  )

static

Definition at line 1550 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, int  vp7  )

static

Definition at line 1560 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, int  is_vp7  )

static

Definition at line 1596 of file vp8.c.

Referenced by 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

s	VP8 decoding context
dst	target buffer for block data at block position
ref	reference picture buffer at origin (0, 0)
mv	motion vector (relative to block position) to get pixel data from
x_off	horizontal position of block from origin (0, 0)
y_off	vertical position of block from origin (0, 0)
block_w	width of block (16, 8 or 4)
block_h	height of block (always same as block_w)
width	width of src/dst plane data
height	height of src/dst plane data
linesize	size of a single line of plane data, including padding
mc_func	motion compensation function pointers (bilinear or sixtap MC)

Definition at line 1734 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

s	VP8 decoding context
dst1	target buffer for block data at block position (U plane)
dst2	target buffer for block data at block position (V plane)
ref	reference picture buffer at origin (0, 0)
mv	motion vector (relative to block position) to get pixel data from
x_off	horizontal position of block from origin (0, 0)
y_off	vertical position of block from origin (0, 0)
block_w	width of block (16, 8 or 4)
block_h	height of block (always same as block_w)
width	width of src/dst plane data
height	height of src/dst plane data
linesize	size of a single line of plane data, including padding
mc_func	motion compensation function pointers (bilinear or sixtap MC)

Definition at line 1792 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 1842 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 1880 of file vp8.c.

Referenced by 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 1903 of file vp8.c.

Referenced by 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 1987 of file vp8.c.

Referenced by decode_mb_row_no_filter().

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

static

Definition at line 2049 of file vp8.c.

Referenced by 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, int  is_vp7  )

static

Definition at line 2082 of file vp8.c.

Referenced by 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 2169 of file vp8.c.

Referenced by filter_mb_row().

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

static

Definition at line 2203 of file vp8.c.

Referenced by vp7_decode_mv_mb_modes(), and vp8_decode_mv_mb_modes().

static void vp7_decode_mv_mb_modes ( AVCodecContext *  avctx, VP8Frame *  cur_frame, VP8Frame *  prev_frame  )

static

Definition at line 2235 of file vp8.c.

Referenced by vp78_decode_frame().

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

static

Definition at line 2241 of file vp8.c.

Referenced by vp78_decode_frame().

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 2285 of file vp8.c.

Referenced by vp7_decode_mb_row_no_filter(), and vp8_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 2413 of file vp8.c.

Referenced by vp78_decode_init().

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

static

Definition at line 2419 of file vp8.c.

Referenced by vp78_decode_init().

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

static

Definition at line 2425 of file vp8.c.

Referenced by vp7_filter_mb_row(), and vp8_filter_mb_row().

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

static

Definition at line 2484 of file vp8.c.

Referenced by vp78_decode_init().

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

static

Definition at line 2490 of file vp8.c.

Referenced by vp78_decode_init().

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 2497 of file vp8.c.

Referenced by vp7_decode_mb_row_sliced(), and vp8_decode_mb_row_sliced().

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

static

Definition at line 2531 of file vp8.c.

Referenced by vp78_decode_frame().

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

static

Definition at line 2537 of file vp8.c.

Referenced by vp78_decode_frame().

static av_always_inline int vp78_decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame, AVPacket *  avpkt, int  is_vp7  )

static

Definition at line 2545 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 2705 of file vp8.c.

Referenced by vp8_lossy_decode_frame().

av_cold int ff_vp8_decode_free

(

AVCodecContext *

avctx

)

Definition at line 2719 of file vp8.c.

Referenced by vp78_decode_init(), and webp_decode_close().

static av_cold int vp8_init_frames ( VP8Context *  s )

static

Definition at line 2734 of file vp8.c.

Referenced by vp78_decode_init().

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

static

Definition at line 2746 of file vp8.c.

Referenced by ff_vp8_decode_init().

av_cold int ff_vp8_decode_init

(

AVCodecContext *

avctx

)

Definition at line 2789 of file vp8.c.

Referenced by vp8_lossy_decode_frame().

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 1710 of file vp8.c.