FFmpeg
Data Structures | Macros | Functions | Variables
vf_bwdif.c File Reference
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "bwdif.h"

Go to the source code of this file.

Data Structures

struct  ThreadData
 Used for passing data between threads. More...
 

Macros

#define FILTER_INTRA()
 
#define FILTER1()
 
#define SPAT_CHECK()
 
#define FILTER_LINE()
 
#define FILTER_EDGE()
 
#define FILTER2()
 
#define OFFSET(x)   offsetof(YADIFContext, x)
 
#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 
#define CONST(name, help, val, unit)   { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }
 

Functions

static void filter_intra (void *dst1, void *cur1, int w, int prefs, int mrefs, int prefs3, int mrefs3, int parity, int clip_max)
 
static void filter_line_c (void *dst1, void *prev1, void *cur1, void *next1, int w, int prefs, int mrefs, int prefs2, int mrefs2, int prefs3, int mrefs3, int prefs4, int mrefs4, int parity, int clip_max)
 
static void filter_edge (void *dst1, void *prev1, void *cur1, void *next1, int w, int prefs, int mrefs, int prefs2, int mrefs2, int parity, int clip_max, int spat)
 
static void filter_intra_16bit (void *dst1, void *cur1, int w, int prefs, int mrefs, int prefs3, int mrefs3, int parity, int clip_max)
 
static void filter_line_c_16bit (void *dst1, void *prev1, void *cur1, void *next1, int w, int prefs, int mrefs, int prefs2, int mrefs2, int prefs3, int mrefs3, int prefs4, int mrefs4, int parity, int clip_max)
 
static void filter_edge_16bit (void *dst1, void *prev1, void *cur1, void *next1, int w, int prefs, int mrefs, int prefs2, int mrefs2, int parity, int clip_max, int spat)
 
static int filter_slice (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static void filter (AVFilterContext *ctx, AVFrame *dstpic, int parity, int tff)
 
static av_cold void uninit (AVFilterContext *ctx)
 
static int query_formats (AVFilterContext *ctx)
 
static int config_props (AVFilterLink *link)
 
 AVFILTER_DEFINE_CLASS (bwdif)
 

Variables

static const uint16_t coef_lf [2] = { 4309, 213 }
 
static const uint16_t coef_hf [3] = { 5570, 3801, 1016 }
 
static const uint16_t coef_sp [2] = { 5077, 981 }
 
static const AVOption bwdif_options []
 
static const AVFilterPad avfilter_vf_bwdif_inputs []
 
static const AVFilterPad avfilter_vf_bwdif_outputs []
 
AVFilter ff_vf_bwdif
 

Macro Definition Documentation

#define FILTER_INTRA ( )
Value:
for (x = 0; x < w; x++) { \
interpol = (coef_sp[0] * (cur[mrefs] + cur[prefs]) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
dst[0] = av_clip(interpol, 0, clip_max); \
\
dst++; \
cur++; \
}
static const uint16_t coef_sp[2]
Definition: vf_bwdif.c:50
static int interpol(MBContext *s, uint32_t *color, int x, int y, int linesize)
uint8_t w
Definition: llviddspenc.c:38

Definition at line 60 of file vf_bwdif.c.

Referenced by filter_intra(), and filter_intra_16bit().

#define FILTER1 ( )
Value:
for (x = 0; x < w; x++) { \
int c = cur[mrefs]; \
int d = (prev2[0] + next2[0]) >> 1; \
int e = cur[prefs]; \
int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e)) >> 1; \
int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e)) >> 1; \
int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \
if (!diff) { \
dst[0] = d; \
} else {
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
uint8_t w
Definition: llviddspenc.c:38
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
if(ret)
int
static av_always_inline int diff(const uint32_t a, const uint32_t b)
#define FFMAX3(a, b, c)
Definition: common.h:95

Definition at line 69 of file vf_bwdif.c.

Referenced by filter_edge(), filter_edge_16bit(), filter_line_c(), and filter_line_c_16bit().

#define SPAT_CHECK ( )
Value:
int b = ((prev2[mrefs2] + next2[mrefs2]) >> 1) - c; \
int f = ((prev2[prefs2] + next2[prefs2]) >> 1) - e; \
int dc = d - c; \
int de = d - e; \
int max = FFMAX3(de, dc, FFMIN(b, f)); \
int min = FFMIN3(de, dc, FFMAX(b, f)); \
diff = FFMAX3(diff, min, -max);
#define f(width, name)
Definition: cbs_vp9.c:255
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
#define FFMIN3(a, b, c)
Definition: common.h:97
#define max(a, b)
Definition: cuda_runtime.h:33
#define FFMAX(a, b)
Definition: common.h:94
#define b
Definition: input.c:41
#define FFMIN(a, b)
Definition: common.h:96
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2]...the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so...,+,-,+,-,+,+,-,+,-,+,...hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32-hcoeff[1]-hcoeff[2]-...a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2}an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||.........intra?||||:Block01:yes no||||:Block02:.................||||:Block03::y DC::ref index:||||:Block04::cb DC::motion x:||||.........:cr DC::motion y:||||.................|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------------------------------|||Y subbands||Cb subbands||Cr subbands||||------||------||------|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||------||------||------||||------||------||------|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||------||------||------||||------||------||------|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||------||------||------||||------||------||------|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------------------------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction------------|\Dequantization-------------------\||Reference frames|\IDWT|--------------|Motion\|||Frame 0||Frame 1||Compensation.OBMC v-------|--------------|--------------.\------> Frame n output Frame Frame<----------------------------------/|...|-------------------Range Coder:============Binary Range Coder:-------------------The implemented range coder is an adapted version based upon"Range encoding: an algorithm for removing redundancy from a digitised message."by G.N.N.Martin.The symbols encoded by the Snow range coder are bits(0|1).The associated probabilities are not fix but change depending on the symbol mix seen so far.bit seen|new state---------+-----------------------------------------------0|256-state_transition_table[256-old_state];1|state_transition_table[old_state];state_transition_table={0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:-------------------------FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1.the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled top and top right vectors is used as motion vector prediction the used motion vector is the sum of the predictor and(mvx_diff, mvy_diff)*mv_scale Intra DC Prediction block[y][x] dc[1]
Definition: snow.txt:400
int
static av_always_inline int diff(const uint32_t a, const uint32_t b)
float min
#define FFMAX3(a, b, c)
Definition: common.h:95

Definition at line 83 of file vf_bwdif.c.

#define FILTER_LINE ( )
Value:
if (FFABS(c - e) > temporal_diff0) { \
interpol = (((coef_hf[0] * (prev2[0] + next2[0]) \
- coef_hf[1] * (prev2[mrefs2] + next2[mrefs2] + prev2[prefs2] + next2[prefs2]) \
+ coef_hf[2] * (prev2[mrefs4] + next2[mrefs4] + prev2[prefs4] + next2[prefs4])) >> 2) \
+ coef_lf[0] * (c + e) - coef_lf[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
} else { \
interpol = (coef_sp[0] * (c + e) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
}
static const uint16_t coef_sp[2]
Definition: vf_bwdif.c:50
static const uint16_t coef_lf[2]
Definition: vf_bwdif.c:48
static int interpol(MBContext *s, uint32_t *color, int x, int y, int linesize)
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
#define SPAT_CHECK()
Definition: vf_bwdif.c:83
static const uint16_t coef_hf[3]
Definition: vf_bwdif.c:49
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
if(ret)

Definition at line 92 of file vf_bwdif.c.

Referenced by filter_line_c(), and filter_line_c_16bit().

#define FILTER_EDGE ( )
Value:
if (spat) { \
} \
interpol = (c + e) >> 1;
static int interpol(MBContext *s, uint32_t *color, int x, int y, int linesize)
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
#define SPAT_CHECK()
Definition: vf_bwdif.c:83

Definition at line 103 of file vf_bwdif.c.

Referenced by filter_edge(), and filter_edge_16bit().

#define FILTER2 ( )
Value:
if (interpol > d + diff) \
else if (interpol < d - diff) \
interpol = d - diff; \
\
dst[0] = av_clip(interpol, 0, clip_max); \
} \
\
dst++; \
cur++; \
prev++; \
next++; \
prev2++; \
next2++; \
}
static int interpol(MBContext *s, uint32_t *color, int x, int y, int linesize)
else
Definition: snow.txt:125
static av_always_inline int diff(const uint32_t a, const uint32_t b)

Definition at line 109 of file vf_bwdif.c.

Referenced by filter_edge(), filter_edge_16bit(), filter_line_c(), and filter_line_c_16bit().

#define OFFSET (   x)    offsetof(YADIFContext, x)

Definition at line 370 of file vf_bwdif.c.

Definition at line 371 of file vf_bwdif.c.

#define CONST (   name,
  help,
  val,
  unit 
)    { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }

Definition at line 373 of file vf_bwdif.c.

Referenced by bound().

Function Documentation

static void filter_intra ( void dst1,
void cur1,
int  w,
int  prefs,
int  mrefs,
int  prefs3,
int  mrefs3,
int  parity,
int  clip_max 
)
static

Definition at line 126 of file vf_bwdif.c.

Referenced by config_props().

static void filter_line_c ( void dst1,
void prev1,
void cur1,
void next1,
int  w,
int  prefs,
int  mrefs,
int  prefs2,
int  mrefs2,
int  prefs3,
int  mrefs3,
int  prefs4,
int  mrefs4,
int  parity,
int  clip_max 
)
static

Definition at line 136 of file vf_bwdif.c.

Referenced by config_props().

static void filter_edge ( void dst1,
void prev1,
void cur1,
void next1,
int  w,
int  prefs,
int  mrefs,
int  prefs2,
int  mrefs2,
int  parity,
int  clip_max,
int  spat 
)
static

Definition at line 154 of file vf_bwdif.c.

Referenced by config_props().

static void filter_intra_16bit ( void dst1,
void cur1,
int  w,
int  prefs,
int  mrefs,
int  prefs3,
int  mrefs3,
int  parity,
int  clip_max 
)
static

Definition at line 171 of file vf_bwdif.c.

Referenced by config_props().

static void filter_line_c_16bit ( void dst1,
void prev1,
void cur1,
void next1,
int  w,
int  prefs,
int  mrefs,
int  prefs2,
int  mrefs2,
int  prefs3,
int  mrefs3,
int  prefs4,
int  mrefs4,
int  parity,
int  clip_max 
)
static

Definition at line 181 of file vf_bwdif.c.

Referenced by config_props().

static void filter_edge_16bit ( void dst1,
void prev1,
void cur1,
void next1,
int  w,
int  prefs,
int  mrefs,
int  prefs2,
int  mrefs2,
int  parity,
int  clip_max,
int  spat 
)
static

Definition at line 199 of file vf_bwdif.c.

Referenced by config_props().

static int filter_slice ( AVFilterContext ctx,
void arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 216 of file vf_bwdif.c.

Referenced by filter().

static void filter ( AVFilterContext ctx,
AVFrame dstpic,
int  parity,
int  tff 
)
static

Definition at line 262 of file vf_bwdif.c.

Referenced by config_props().

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 292 of file vf_bwdif.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 302 of file vf_bwdif.c.

static int config_props ( AVFilterLink link)
static

Definition at line 332 of file vf_bwdif.c.

AVFILTER_DEFINE_CLASS ( bwdif  )

Variable Documentation

const uint16_t coef_lf[2] = { 4309, 213 }
static

Definition at line 48 of file vf_bwdif.c.

const uint16_t coef_hf[3] = { 5570, 3801, 1016 }
static

Definition at line 49 of file vf_bwdif.c.

const uint16_t coef_sp[2] = { 5077, 981 }
static

Definition at line 50 of file vf_bwdif.c.

const AVOption bwdif_options[]
static
Initial value:
= {
{ "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FIELD}, 0, 1, FLAGS, "mode"},
CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),
{ "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"),
CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"),
CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"),
{ "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" },
CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"),
CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),
{ NULL }
}
#define NULL
Definition: coverity.c:32
#define CONST(name, help, val, unit)
Definition: vf_bwdif.c:373
bottom field first
Definition: yadif.h:35
send 1 frame for each field
Definition: yadif.h:28
auto detection
Definition: yadif.h:36
mcdeint parity
Definition: vf_mcdeint.c:274
#define OFFSET(x)
Definition: vf_bwdif.c:370
#define FLAGS
Definition: vf_bwdif.c:371
deinterlace all frames
Definition: yadif.h:40
send 1 frame for each frame
Definition: yadif.h:27
only deinterlace frames marked as interlaced
Definition: yadif.h:41
top field first
Definition: yadif.h:34
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83

Definition at line 375 of file vf_bwdif.c.

const AVFilterPad avfilter_vf_bwdif_inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = ff_yadif_filter_frame,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: yadif_common.c:92

Definition at line 394 of file vf_bwdif.c.

const AVFilterPad avfilter_vf_bwdif_outputs[]
static
Initial value:
= {
{
.name = "default",
.request_frame = ff_yadif_request_frame,
.config_props = config_props,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
int ff_yadif_request_frame(AVFilterLink *link)
Definition: yadif_common.c:159
static int config_props(AVFilterLink *link)
Definition: vf_bwdif.c:332

Definition at line 403 of file vf_bwdif.c.

AVFilter ff_vf_bwdif
Initial value:
= {
.name = "bwdif",
.description = NULL_IF_CONFIG_SMALL("Deinterlace the input image."),
.priv_size = sizeof(BWDIFContext),
.priv_class = &bwdif_class,
}
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_bwdif.c:292
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
static const AVFilterPad avfilter_vf_bwdif_inputs[]
Definition: vf_bwdif.c:394
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:133
#define flags(name, subs,...)
Definition: cbs_av1.c:561
static int query_formats(AVFilterContext *ctx)
Definition: vf_bwdif.c:302
static const AVFilterPad avfilter_vf_bwdif_outputs[]
Definition: vf_bwdif.c:403

Definition at line 413 of file vf_bwdif.c.