#include "config_components.h"
#include "libavutil/attributes.h"
#include "libavutil/intreadwrite.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 "libavutil/refstruct.h"
#include "thread.h"
#include "vp8.h"
#include "vp89_rac.h"
#include "vp8data.h"
#include "vpx_rac.h"

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 VP8Frame *	vp8_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 VP8mv *	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, 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 av_always_inline void	filter_mb_row (AVCodecContext avctx, void tdata, int jobnr, int threadnr, int is_vp7)

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)

av_cold int	ff_vp8_decode_free (AVCodecContext *avctx)

static av_cold void	vp78_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 467 of file vp8.c.

◆ VP8_MVC_SIZE

#define VP8_MVC_SIZE 19

Definition at line 468 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);                                                  \
        else                                                                  \
            AV_COPY64(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 2301 of file vp8.c.

◆ check_thread_pos

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

Definition at line 2386 of file vp8.c.

◆ update_pos

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

Definition at line 2387 of file vp8.c.

Function Documentation

◆ vp8_rac_get_sint()

static int vp8_rac_get_sint	(	VPXRangeCoder *	c,
		int	bits
	)

static

Definition at line 53 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 68 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 75 of file vp8.c.

Referenced by decode_block_coeffs_internal().

◆ free_buffers()

static void free_buffers ( VP8Context * s )

static

Definition at line 86 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 106 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 129 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 136 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 152 of file vp8.c.

◆ vp8_find_free_buffer()

static VP8Frame* vp8_find_free_buffer ( VP8Context * s )

static

Definition at line 157 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 181 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 201 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 273 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 278 of file vp8.c.

Referenced by vp8_decode_frame_header().

◆ parse_segment_info()

static void parse_segment_info ( VP8Context * s )

static

Definition at line 284 of file vp8.c.

Referenced by vp8_decode_frame_header().

◆ update_lf_deltas()

static void update_lf_deltas ( VP8Context * s )

static

Definition at line 306 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 330 of file vp8.c.

Referenced by vp8_decode_frame_header().

◆ vp7_get_quants()

static void vp7_get_quants ( VP8Context * s )

static

Definition at line 361 of file vp8.c.

Referenced by vp7_decode_frame_header().

◆ vp8_get_quants()

static void vp8_get_quants ( VP8Context * s )

static

Definition at line 380 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 426 of file vp8.c.

Referenced by update_refs().

◆ vp78_reset_probability_tables()

static void vp78_reset_probability_tables ( VP8Context * s )

static

Definition at line 442 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 451 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 470 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 490 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 501 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 512 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 528 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 569 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 733 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 874 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 885 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 913 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 918 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 924 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 941 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_x	macroblock x address
[out]	edge_y	macroblock y address

Returns: macroblock offset legal (boolean)

Definition at line 1023 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 1036 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 1042 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 1132 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 1232 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 1267 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

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 1360 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 1420 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 1442 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 1454 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

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 1479 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 1494 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 1569 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 1581 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 1615 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 1624 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 1633 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 1649 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 1659 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 1695 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

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 1833 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

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 1891 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 1941 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 1979 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 2002 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 2086 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 2149 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 2182 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 2269 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 2303 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 2340 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 2346 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 2390 of file vp8.c.

◆ 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 2523 of file vp8.c.

◆ 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 2577 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 2611 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 2617 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 2624 of file vp8.c.

◆ ff_vp8_decode_free()

av_cold int ff_vp8_decode_free ( AVCodecContext * avctx )

Definition at line 2818 of file vp8.c.

Referenced by webp_decode_close().

◆ vp78_decode_init()

static av_cold void vp78_decode_init ( AVCodecContext * avctx )

static

Definition at line 2825 of file vp8.c.

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 1809 of file vp8.c.

Referenced by vp8_mc_chroma(), and vp8_mc_luma().

Macros

Functions

Variables

Macro Definition Documentation

◆ VP7_MVC_SIZE

◆ VP8_MVC_SIZE

◆ MV_EDGE_CHECK

◆ XCHG

◆ H_LOOP_FILTER_16Y_INNER

◆ MARGIN

◆ check_thread_pos

◆ update_pos

Function Documentation

◆ vp8_rac_get_sint()

◆ vp8_rac_get_nn()

◆ vp8_rac_get_coeff()

◆ free_buffers()

◆ vp8_alloc_frame()

◆ vp8_release_frame()

◆ vp8_decode_flush_impl()

◆ vp8_decode_flush()

◆ vp8_find_free_buffer()

◆ get_pixel_format()

◆ update_dimensions()

◆ vp7_update_dimensions()

◆ vp8_update_dimensions()

◆ parse_segment_info()

◆ update_lf_deltas()

◆ setup_partitions()

◆ vp7_get_quants()

◆ vp8_get_quants()

◆ ref_to_update()

◆ vp78_reset_probability_tables()

◆ vp78_update_probability_tables()

◆ vp78_update_pred16x16_pred8x8_mvc_probabilities()

◆ update_refs()

◆ copy_chroma()

◆ fade()

◆ vp7_fade_frame()

◆ vp7_decode_frame_header()

◆ vp8_decode_frame_header()

◆ clamp_mv()

◆ read_mv_component()

◆ vp7_read_mv_component()

◆ vp8_read_mv_component()

◆ get_submv_prob()

◆ decode_splitmvs()

◆ vp7_calculate_mb_offset()

◆ get_bmv_ptr()

◆ vp7_decode_mvs()

◆ vp8_decode_mvs()

◆ decode_intra4x4_modes()

◆ decode_mb_mode()

◆ decode_block_coeffs_internal()

◆ inter_predict_dc()

◆ vp7_decode_block_coeffs_internal()

◆ vp8_decode_block_coeffs_internal()

◆ decode_block_coeffs()

◆ decode_mb_coeffs()

◆ backup_mb_border()

◆ xchg_mb_border()

◆ check_dc_pred8x8_mode()

◆ check_tm_pred8x8_mode()

◆ check_intra_pred8x8_mode_emuedge()

◆ check_tm_pred4x4_mode()

◆ check_intra_pred4x4_mode_emuedge()

◆ intra_predict()

◆ vp8_mc_luma()

◆ vp8_mc_chroma()

◆ vp8_mc_part()

◆ prefetch_motion()

◆ inter_predict()

◆ idct_mb()

◆ filter_level_for_mb()

◆ filter_mb()

◆ filter_mb_simple()

◆ vp78_decode_mv_mb_modes()

◆ vp7_decode_mv_mb_modes()

◆ vp8_decode_mv_mb_modes()

◆ decode_mb_row_no_filter()