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

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)

#define	update_pos(td, mb_y, mb_x)

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.

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, int dst_linesize, const uint8_t src, int 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 (VP8Context 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.

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.

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.

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, 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, 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, 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, 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

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

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

static void	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 45 of file vp8.c.

#define VP7_MVC_SIZE 17

Definition at line 385 of file vp8.c.

Referenced by vp7_decode_frame_header().

#define VP8_MVC_SIZE 19

Definition at line 386 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)

#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 2174 of file vp8.c.

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

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

Definition at line 2256 of file vp8.c.

Referenced by decode_mb_row_no_filter(), and filter_mb_row().

#define update_pos	(	td,
		mb_y,
		mb_x
	)

Definition at line 2257 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 48 of file vp8.c.

Referenced by vp8_decode_flush_impl().

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

static

Definition at line 68 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 81 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 106 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 119 of file vp8.c.

static VP8Frame* vp8_find_free_buffer ( VP8Context * s )

static

Definition at line 124 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 149 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 197 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 202 of file vp8.c.

Referenced by vp8_decode_frame_header().

static void parse_segment_info ( VP8Context * s )

static

Definition at line 208 of file vp8.c.

Referenced by vp8_decode_frame_header().

static void update_lf_deltas ( VP8Context * s )

static

Definition at line 229 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 253 of file vp8.c.

Referenced by vp8_decode_frame_header().

static void vp7_get_quants ( VP8Context * s )

static

Definition at line 279 of file vp8.c.

Referenced by vp7_decode_frame_header().

static void vp8_get_quants ( VP8Context * s )

static

Definition at line 298 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 344 of file vp8.c.

Referenced by update_refs().

static void vp78_reset_probability_tables ( VP8Context * s )

static

Definition at line 360 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 369 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 388 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 408 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 419 of file vp8.c.

Referenced by vp7_fade_frame().

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

static

Definition at line 430 of file vp8.c.

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

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

static

Definition at line 444 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 483 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 629 of file vp8.c.

Referenced by vp78_decode_frame().

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

static

Definition at line 752 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 761 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 789 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 794 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 800 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 817 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 899 of file vp8.c.

Referenced by vp7_decode_mvs().

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

static

Definition at line 912 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 918 of file vp8.c.

Referenced by decode_mb_mode().

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

static

Definition at line 1009 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 1109 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,
		int	is_vp7
	)

static

Definition at line 1144 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 1235 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 1295 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 1317 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 1329 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 1354 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 1369 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,
		int	linesize,
		int	uvlinesize,
		int	simple
	)

static

Definition at line 1444 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,
		int	linesize,
		int	uvlinesize,
		int	mb_x,
		int	mb_y,
		int	mb_width,
		int	simple,
		int	xchg
	)

static

Definition at line 1456 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 1490 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 1499 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 1508 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 1524 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 1534 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 1570 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 1707 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 1765 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 1815 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 1853 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 1876 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 1960 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 2022 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 2055 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 2142 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 2176 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 2208 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 2214 of file vp8.c.

Referenced by vp78_decode_frame().

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

static

Definition at line 2260 of file vp8.c.

Referenced by vp7_decode_mb_row_no_filter(), and vp8_decode_mb_row_no_filter().

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

static

Definition at line 2381 of file vp8.c.

Referenced by vp78_decode_init().

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

static

Definition at line 2387 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 2393 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 2452 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 2458 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 2465 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 2494 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 2500 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 2508 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 2665 of file vp8.c.

Referenced by vp8_lossy_decode_frame().

av_cold int ff_vp8_decode_free ( AVCodecContext * avctx )

Definition at line 2679 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 2691 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 2703 of file vp8.c.

Referenced by ff_vp8_decode_init().

av_cold int ff_vp8_decode_init ( AVCodecContext * avctx )

Definition at line 2746 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 1683 of file vp8.c.

Macros

Functions

Variables

Macro Definition Documentation

Function Documentation

Variable Documentation