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FFmpeg/libavfilter/vf_fieldmatch.c
Andreas Rheinhardt b4f5201967 avfilter: Replace query_formats callback with union of list and callback 
If one looks at the many query_formats callbacks in existence,
one will immediately recognize that there is one type of default
callback for video and a slightly different default callback for
audio: It is "return ff_set_common_formats_from_list(ctx, pix_fmts);"
for video with a filter-specific pix_fmts list. For audio, it is
the same with a filter-specific sample_fmts list together with
ff_set_common_all_samplerates() and ff_set_common_all_channel_counts().

This commit allows to remove the boilerplate query_formats callbacks
by replacing said callback with a union consisting the old callback
and pointers for pixel and sample format arrays. For the not uncommon
case in which these lists only contain a single entry (besides the
sentinel) enum AVPixelFormat and enum AVSampleFormat fields are also
added to the union to store them directly in the AVFilter,
thereby avoiding a relocation.

The state of said union will be contained in a new, dedicated AVFilter
field (the nb_inputs and nb_outputs fields have been shrunk to uint8_t
in order to create a hole for this new field; this is no problem, as
the maximum of all the nb_inputs is four; for nb_outputs it is only
two).

The state's default value coincides with the earlier default of
query_formats being unset, namely that the filter accepts all formats
(and also sample rates and channel counts/layouts for audio)
provided that these properties agree coincide for all inputs and
outputs.

By using different union members for audio and video filters
the type-unsafety of using the same functions for audio and video
lists will furthermore be more confined to formats.c than before.

When the new fields are used, they will also avoid allocations:
Currently something nearly equivalent to ff_default_query_formats()
is called after every successful call to a query_formats callback;
yet in the common case that the newly allocated AVFilterFormats
are not used at all (namely if there are no free links) these newly
allocated AVFilterFormats are freed again without ever being used.
Filters no longer using the callback will not exhibit this any more.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-10-05 17:48:25 +02:00

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/*
* Copyright (c) 2012 Fredrik Mellbin
* Copyright (c) 2013 Clément Bœsch
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Fieldmatching filter, ported from VFM filter (VapourSynth) by Clément.
* Fredrik Mellbin is the author of the VIVTC/VFM filter, which is itself a
* light clone of the TIVTC/TFM (AviSynth) filter written by Kevin Stone
* (tritical), the original author.
*
* @see http://bengal.missouri.edu/~kes25c/
* @see http://www.vapoursynth.com/about/
*/
#include <inttypes.h>
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/timestamp.h"
#include "avfilter.h"
#include "filters.h"
#include "internal.h"
#define INPUT_MAIN 0
#define INPUT_CLEANSRC 1
enum fieldmatch_parity {
FM_PARITY_AUTO = -1,
FM_PARITY_BOTTOM = 0,
FM_PARITY_TOP = 1,
};
enum matching_mode {
MODE_PC,
MODE_PC_N,
MODE_PC_U,
MODE_PC_N_UB,
MODE_PCN,
MODE_PCN_UB,
NB_MODE
};
enum comb_matching_mode {
COMBMATCH_NONE,
COMBMATCH_SC,
COMBMATCH_FULL,
NB_COMBMATCH
};
enum comb_dbg {
COMBDBG_NONE,
COMBDBG_PCN,
COMBDBG_PCNUB,
NB_COMBDBG
};
typedef struct FieldMatchContext {
const AVClass *class;
AVFrame *prv, *src, *nxt; ///< main sliding window of 3 frames
AVFrame *prv2, *src2, *nxt2; ///< sliding window of the optional second stream
int got_frame[2]; ///< frame request flag for each input stream
int hsub, vsub; ///< chroma subsampling values
int bpc; ///< bytes per component
uint32_t eof; ///< bitmask for end of stream
int64_t lastscdiff;
int64_t lastn;
/* options */
int order;
int ppsrc;
int mode; ///< matching_mode
int field;
int mchroma;
int y0, y1;
int64_t scthresh;
double scthresh_flt;
int combmatch; ///< comb_matching_mode
int combdbg;
int cthresh;
int chroma;
int blockx, blocky;
int combpel;
/* misc buffers */
uint8_t *map_data[4];
int map_linesize[4];
uint8_t *cmask_data[4];
int cmask_linesize[4];
int *c_array;
int tpitchy, tpitchuv;
uint8_t *tbuffer;
} FieldMatchContext;
#define OFFSET(x) offsetof(FieldMatchContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption fieldmatch_options[] = {
{ "order", "specify the assumed field order", OFFSET(order), AV_OPT_TYPE_INT, {.i64=FM_PARITY_AUTO}, -1, 1, FLAGS, "order" },
{ "auto", "auto detect parity", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_AUTO}, INT_MIN, INT_MAX, FLAGS, "order" },
{ "bff", "assume bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_BOTTOM}, INT_MIN, INT_MAX, FLAGS, "order" },
{ "tff", "assume top field first", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_TOP}, INT_MIN, INT_MAX, FLAGS, "order" },
{ "mode", "set the matching mode or strategy to use", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_PC_N}, MODE_PC, NB_MODE-1, FLAGS, "mode" },
{ "pc", "2-way match (p/c)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PC}, INT_MIN, INT_MAX, FLAGS, "mode" },
{ "pc_n", "2-way match + 3rd match on combed (p/c + u)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PC_N}, INT_MIN, INT_MAX, FLAGS, "mode" },
{ "pc_u", "2-way match + 3rd match (same order) on combed (p/c + u)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PC_U}, INT_MIN, INT_MAX, FLAGS, "mode" },
{ "pc_n_ub", "2-way match + 3rd match on combed + 4th/5th matches if still combed (p/c + u + u/b)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PC_N_UB}, INT_MIN, INT_MAX, FLAGS, "mode" },
{ "pcn", "3-way match (p/c/n)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PCN}, INT_MIN, INT_MAX, FLAGS, "mode" },
{ "pcn_ub", "3-way match + 4th/5th matches on combed (p/c/n + u/b)", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PCN_UB}, INT_MIN, INT_MAX, FLAGS, "mode" },
{ "ppsrc", "mark main input as a pre-processed input and activate clean source input stream", OFFSET(ppsrc), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ "field", "set the field to match from", OFFSET(field), AV_OPT_TYPE_INT, {.i64=FM_PARITY_AUTO}, -1, 1, FLAGS, "field" },
{ "auto", "automatic (same value as 'order')", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_AUTO}, INT_MIN, INT_MAX, FLAGS, "field" },
{ "bottom", "bottom field", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_BOTTOM}, INT_MIN, INT_MAX, FLAGS, "field" },
{ "top", "top field", 0, AV_OPT_TYPE_CONST, {.i64=FM_PARITY_TOP}, INT_MIN, INT_MAX, FLAGS, "field" },
{ "mchroma", "set whether or not chroma is included during the match comparisons", OFFSET(mchroma), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "y0", "define an exclusion band which excludes the lines between y0 and y1 from the field matching decision", OFFSET(y0), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
{ "y1", "define an exclusion band which excludes the lines between y0 and y1 from the field matching decision", OFFSET(y1), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
{ "scthresh", "set scene change detection threshold", OFFSET(scthresh_flt), AV_OPT_TYPE_DOUBLE, {.dbl=12}, 0, 100, FLAGS },
{ "combmatch", "set combmatching mode", OFFSET(combmatch), AV_OPT_TYPE_INT, {.i64=COMBMATCH_SC}, COMBMATCH_NONE, NB_COMBMATCH-1, FLAGS, "combmatching" },
{ "none", "disable combmatching", 0, AV_OPT_TYPE_CONST, {.i64=COMBMATCH_NONE}, INT_MIN, INT_MAX, FLAGS, "combmatching" },
{ "sc", "enable combmatching only on scene change", 0, AV_OPT_TYPE_CONST, {.i64=COMBMATCH_SC}, INT_MIN, INT_MAX, FLAGS, "combmatching" },
{ "full", "enable combmatching all the time", 0, AV_OPT_TYPE_CONST, {.i64=COMBMATCH_FULL}, INT_MIN, INT_MAX, FLAGS, "combmatching" },
{ "combdbg", "enable comb debug", OFFSET(combdbg), AV_OPT_TYPE_INT, {.i64=COMBDBG_NONE}, COMBDBG_NONE, NB_COMBDBG-1, FLAGS, "dbglvl" },
{ "none", "no forced calculation", 0, AV_OPT_TYPE_CONST, {.i64=COMBDBG_NONE}, INT_MIN, INT_MAX, FLAGS, "dbglvl" },
{ "pcn", "calculate p/c/n", 0, AV_OPT_TYPE_CONST, {.i64=COMBDBG_PCN}, INT_MIN, INT_MAX, FLAGS, "dbglvl" },
{ "pcnub", "calculate p/c/n/u/b", 0, AV_OPT_TYPE_CONST, {.i64=COMBDBG_PCNUB}, INT_MIN, INT_MAX, FLAGS, "dbglvl" },
{ "cthresh", "set the area combing threshold used for combed frame detection", OFFSET(cthresh), AV_OPT_TYPE_INT, {.i64= 9}, -1, 0xff, FLAGS },
{ "chroma", "set whether or not chroma is considered in the combed frame decision", OFFSET(chroma), AV_OPT_TYPE_BOOL,{.i64= 0}, 0, 1, FLAGS },
{ "blockx", "set the x-axis size of the window used during combed frame detection", OFFSET(blockx), AV_OPT_TYPE_INT, {.i64=16}, 4, 1<<9, FLAGS },
{ "blocky", "set the y-axis size of the window used during combed frame detection", OFFSET(blocky), AV_OPT_TYPE_INT, {.i64=16}, 4, 1<<9, FLAGS },
{ "combpel", "set the number of combed pixels inside any of the blocky by blockx size blocks on the frame for the frame to be detected as combed", OFFSET(combpel), AV_OPT_TYPE_INT, {.i64=80}, 0, INT_MAX, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(fieldmatch);
static int get_width(const FieldMatchContext *fm, const AVFrame *f, int plane)
{
return plane ? AV_CEIL_RSHIFT(f->width, fm->hsub) : f->width;
}
static int get_height(const FieldMatchContext *fm, const AVFrame *f, int plane)
{
return plane ? AV_CEIL_RSHIFT(f->height, fm->vsub) : f->height;
}
static int64_t luma_abs_diff(const AVFrame *f1, const AVFrame *f2)
{
int x, y;
const uint8_t *srcp1 = f1->data[0];
const uint8_t *srcp2 = f2->data[0];
const int src1_linesize = f1->linesize[0];
const int src2_linesize = f2->linesize[0];
const int width = f1->width;
const int height = f1->height;
int64_t acc = 0;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++)
acc += abs(srcp1[x] - srcp2[x]);
srcp1 += src1_linesize;
srcp2 += src2_linesize;
}
return acc;
}
static void fill_buf(uint8_t *data, int w, int h, int linesize, uint8_t v)
{
int y;
for (y = 0; y < h; y++) {
memset(data, v, w);
data += linesize;
}
}
static int calc_combed_score(const FieldMatchContext *fm, const AVFrame *src)
{
int x, y, plane, max_v = 0;
const int cthresh = fm->cthresh;
const int cthresh6 = cthresh * 6;
for (plane = 0; plane < (fm->chroma ? 3 : 1); plane++) {
const uint8_t *srcp = src->data[plane];
const int src_linesize = src->linesize[plane];
const int width = get_width (fm, src, plane);
const int height = get_height(fm, src, plane);
uint8_t *cmkp = fm->cmask_data[plane];
const int cmk_linesize = fm->cmask_linesize[plane];
if (cthresh < 0) {
fill_buf(cmkp, width, height, cmk_linesize, 0xff);
continue;
}
fill_buf(cmkp, width, height, cmk_linesize, 0);
/* [1 -3 4 -3 1] vertical filter */
#define FILTER(xm2, xm1, xp1, xp2) \
abs( 4 * srcp[x] \
-3 * (srcp[x + (xm1)*src_linesize] + srcp[x + (xp1)*src_linesize]) \
+ (srcp[x + (xm2)*src_linesize] + srcp[x + (xp2)*src_linesize])) > cthresh6
/* first line */
for (x = 0; x < width; x++) {
const int s1 = abs(srcp[x] - srcp[x + src_linesize]);
if (s1 > cthresh && FILTER(2, 1, 1, 2))
cmkp[x] = 0xff;
}
srcp += src_linesize;
cmkp += cmk_linesize;
/* second line */
for (x = 0; x < width; x++) {
const int s1 = abs(srcp[x] - srcp[x - src_linesize]);
const int s2 = abs(srcp[x] - srcp[x + src_linesize]);
if (s1 > cthresh && s2 > cthresh && FILTER(2, -1, 1, 2))
cmkp[x] = 0xff;
}
srcp += src_linesize;
cmkp += cmk_linesize;
/* all lines minus first two and last two */
for (y = 2; y < height-2; y++) {
for (x = 0; x < width; x++) {
const int s1 = abs(srcp[x] - srcp[x - src_linesize]);
const int s2 = abs(srcp[x] - srcp[x + src_linesize]);
if (s1 > cthresh && s2 > cthresh && FILTER(-2, -1, 1, 2))
cmkp[x] = 0xff;
}
srcp += src_linesize;
cmkp += cmk_linesize;
}
/* before-last line */
for (x = 0; x < width; x++) {
const int s1 = abs(srcp[x] - srcp[x - src_linesize]);
const int s2 = abs(srcp[x] - srcp[x + src_linesize]);
if (s1 > cthresh && s2 > cthresh && FILTER(-2, -1, 1, -2))
cmkp[x] = 0xff;
}
srcp += src_linesize;
cmkp += cmk_linesize;
/* last line */
for (x = 0; x < width; x++) {
const int s1 = abs(srcp[x] - srcp[x - src_linesize]);
if (s1 > cthresh && FILTER(-2, -1, -1, -2))
cmkp[x] = 0xff;
}
}
if (fm->chroma) {
uint8_t *cmkp = fm->cmask_data[0];
uint8_t *cmkpU = fm->cmask_data[1];
uint8_t *cmkpV = fm->cmask_data[2];
const int width = AV_CEIL_RSHIFT(src->width, fm->hsub);
const int height = AV_CEIL_RSHIFT(src->height, fm->vsub);
const int cmk_linesize = fm->cmask_linesize[0] << 1;
const int cmk_linesizeUV = fm->cmask_linesize[2];
uint8_t *cmkpp = cmkp - (cmk_linesize>>1);
uint8_t *cmkpn = cmkp + (cmk_linesize>>1);
uint8_t *cmkpnn = cmkp + cmk_linesize;
for (y = 1; y < height - 1; y++) {
cmkpp += cmk_linesize;
cmkp += cmk_linesize;
cmkpn += cmk_linesize;
cmkpnn += cmk_linesize;
cmkpV += cmk_linesizeUV;
cmkpU += cmk_linesizeUV;
for (x = 1; x < width - 1; x++) {
#define HAS_FF_AROUND(p, lz) (p[(x)-1 - (lz)] == 0xff || p[(x) - (lz)] == 0xff || p[(x)+1 - (lz)] == 0xff || \
p[(x)-1 ] == 0xff || p[(x)+1 ] == 0xff || \
p[(x)-1 + (lz)] == 0xff || p[(x) + (lz)] == 0xff || p[(x)+1 + (lz)] == 0xff)
if ((cmkpV[x] == 0xff && HAS_FF_AROUND(cmkpV, cmk_linesizeUV)) ||
(cmkpU[x] == 0xff && HAS_FF_AROUND(cmkpU, cmk_linesizeUV))) {
((uint16_t*)cmkp)[x] = 0xffff;
((uint16_t*)cmkpn)[x] = 0xffff;
if (y&1) ((uint16_t*)cmkpp)[x] = 0xffff;
else ((uint16_t*)cmkpnn)[x] = 0xffff;
}
}
}
}
{
const int blockx = fm->blockx;
const int blocky = fm->blocky;
const int xhalf = blockx/2;
const int yhalf = blocky/2;
const int cmk_linesize = fm->cmask_linesize[0];
const uint8_t *cmkp = fm->cmask_data[0] + cmk_linesize;
const int width = src->width;
const int height = src->height;
const int xblocks = ((width+xhalf)/blockx) + 1;
const int xblocks4 = xblocks<<2;
const int yblocks = ((height+yhalf)/blocky) + 1;
int *c_array = fm->c_array;
const int arraysize = (xblocks*yblocks)<<2;
int heighta = (height/(blocky/2))*(blocky/2);
const int widtha = (width /(blockx/2))*(blockx/2);
if (heighta == height)
heighta = height - yhalf;
memset(c_array, 0, arraysize * sizeof(*c_array));
#define C_ARRAY_ADD(v) do { \
const int box1 = (x / blockx) * 4; \
const int box2 = ((x + xhalf) / blockx) * 4; \
c_array[temp1 + box1 ] += v; \
c_array[temp1 + box2 + 1] += v; \
c_array[temp2 + box1 + 2] += v; \
c_array[temp2 + box2 + 3] += v; \
} while (0)
#define VERTICAL_HALF(y_start, y_end) do { \
for (y = y_start; y < y_end; y++) { \
const int temp1 = (y / blocky) * xblocks4; \
const int temp2 = ((y + yhalf) / blocky) * xblocks4; \
for (x = 0; x < width; x++) \
if (cmkp[x - cmk_linesize] == 0xff && \
cmkp[x ] == 0xff && \
cmkp[x + cmk_linesize] == 0xff) \
C_ARRAY_ADD(1); \
cmkp += cmk_linesize; \
} \
} while (0)
VERTICAL_HALF(1, yhalf);
for (y = yhalf; y < heighta; y += yhalf) {
const int temp1 = (y / blocky) * xblocks4;
const int temp2 = ((y + yhalf) / blocky) * xblocks4;
for (x = 0; x < widtha; x += xhalf) {
const uint8_t *cmkp_tmp = cmkp + x;
int u, v, sum = 0;
for (u = 0; u < yhalf; u++) {
for (v = 0; v < xhalf; v++)
if (cmkp_tmp[v - cmk_linesize] == 0xff &&
cmkp_tmp[v ] == 0xff &&
cmkp_tmp[v + cmk_linesize] == 0xff)
sum++;
cmkp_tmp += cmk_linesize;
}
if (sum)
C_ARRAY_ADD(sum);
}
for (x = widtha; x < width; x++) {
const uint8_t *cmkp_tmp = cmkp + x;
int u, sum = 0;
for (u = 0; u < yhalf; u++) {
if (cmkp_tmp[-cmk_linesize] == 0xff &&
cmkp_tmp[ 0] == 0xff &&
cmkp_tmp[ cmk_linesize] == 0xff)
sum++;
cmkp_tmp += cmk_linesize;
}
if (sum)
C_ARRAY_ADD(sum);
}
cmkp += cmk_linesize * yhalf;
}
VERTICAL_HALF(heighta, height - 1);
for (x = 0; x < arraysize; x++)
if (c_array[x] > max_v)
max_v = c_array[x];
}
return max_v;
}
// the secret is that tbuffer is an interlaced, offset subset of all the lines
static void build_abs_diff_mask(const uint8_t *prvp, int prv_linesize,
const uint8_t *nxtp, int nxt_linesize,
uint8_t *tbuffer, int tbuf_linesize,
int width, int height)
{
int y, x;
prvp -= prv_linesize;
nxtp -= nxt_linesize;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++)
tbuffer[x] = FFABS(prvp[x] - nxtp[x]);
prvp += prv_linesize;
nxtp += nxt_linesize;
tbuffer += tbuf_linesize;
}
}
/**
* Build a map over which pixels differ a lot/a little
*/
static void build_diff_map(FieldMatchContext *fm,
const uint8_t *prvp, int prv_linesize,
const uint8_t *nxtp, int nxt_linesize,
uint8_t *dstp, int dst_linesize, int height,
int width, int plane)
{
int x, y, u, diff, count;
int tpitch = plane ? fm->tpitchuv : fm->tpitchy;
const uint8_t *dp = fm->tbuffer + tpitch;
build_abs_diff_mask(prvp, prv_linesize, nxtp, nxt_linesize,
fm->tbuffer, tpitch, width, height>>1);
for (y = 2; y < height - 2; y += 2) {
for (x = 1; x < width - 1; x++) {
diff = dp[x];
if (diff > 3) {
for (count = 0, u = x-1; u < x+2 && count < 2; u++) {
count += dp[u-tpitch] > 3;
count += dp[u ] > 3;
count += dp[u+tpitch] > 3;
}
if (count > 1) {
dstp[x] = 1;
if (diff > 19) {
int upper = 0, lower = 0;
for (count = 0, u = x-1; u < x+2 && count < 6; u++) {
if (dp[u-tpitch] > 19) { count++; upper = 1; }
if (dp[u ] > 19) count++;
if (dp[u+tpitch] > 19) { count++; lower = 1; }
}
if (count > 3) {
if (upper && lower) {
dstp[x] |= 1<<1;
} else {
int upper2 = 0, lower2 = 0;
for (u = FFMAX(x-4,0); u < FFMIN(x+5,width); u++) {
if (y != 2 && dp[u-2*tpitch] > 19) upper2 = 1;
if ( dp[u- tpitch] > 19) upper = 1;
if ( dp[u+ tpitch] > 19) lower = 1;
if (y != height-4 && dp[u+2*tpitch] > 19) lower2 = 1;
}
if ((upper && (lower || upper2)) ||
(lower && (upper || lower2)))
dstp[x] |= 1<<1;
else if (count > 5)
dstp[x] |= 1<<2;
}
}
}
}
}
}
dp += tpitch;
dstp += dst_linesize;
}
}
enum { mP, mC, mN, mB, mU };
static int get_field_base(int match, int field)
{
return match < 3 ? 2 - field : 1 + field;
}
static AVFrame *select_frame(FieldMatchContext *fm, int match)
{
if (match == mP || match == mB) return fm->prv;
else if (match == mN || match == mU) return fm->nxt;
else /* match == mC */ return fm->src;
}
static int compare_fields(FieldMatchContext *fm, int match1, int match2, int field)
{
int plane, ret;
uint64_t accumPc = 0, accumPm = 0, accumPml = 0;
uint64_t accumNc = 0, accumNm = 0, accumNml = 0;
int norm1, norm2, mtn1, mtn2;
float c1, c2, mr;
const AVFrame *src = fm->src;
for (plane = 0; plane < (fm->mchroma ? 3 : 1); plane++) {
int x, y, temp1, temp2, fbase;
const AVFrame *prev, *next;
uint8_t *mapp = fm->map_data[plane];
int map_linesize = fm->map_linesize[plane];
const uint8_t *srcp = src->data[plane];
const int src_linesize = src->linesize[plane];
const int srcf_linesize = src_linesize << 1;
int prv_linesize, nxt_linesize;
int prvf_linesize, nxtf_linesize;
const int width = get_width (fm, src, plane);
const int height = get_height(fm, src, plane);
const int y0a = fm->y0 >> (plane ? fm->vsub : 0);
const int y1a = fm->y1 >> (plane ? fm->vsub : 0);
const int startx = (plane == 0 ? 8 : 8 >> fm->hsub);
const int stopx = width - startx;
const uint8_t *srcpf, *srcf, *srcnf;
const uint8_t *prvpf, *prvnf, *nxtpf, *nxtnf;
fill_buf(mapp, width, height, map_linesize, 0);
/* match1 */
fbase = get_field_base(match1, field);
srcf = srcp + (fbase + 1) * src_linesize;
srcpf = srcf - srcf_linesize;
srcnf = srcf + srcf_linesize;
mapp = mapp + fbase * map_linesize;
prev = select_frame(fm, match1);
prv_linesize = prev->linesize[plane];
prvf_linesize = prv_linesize << 1;
prvpf = prev->data[plane] + fbase * prv_linesize; // previous frame, previous field
prvnf = prvpf + prvf_linesize; // previous frame, next field
/* match2 */
fbase = get_field_base(match2, field);
next = select_frame(fm, match2);
nxt_linesize = next->linesize[plane];
nxtf_linesize = nxt_linesize << 1;
nxtpf = next->data[plane] + fbase * nxt_linesize; // next frame, previous field
nxtnf = nxtpf + nxtf_linesize; // next frame, next field
map_linesize <<= 1;
if ((match1 >= 3 && field == 1) || (match1 < 3 && field != 1))
build_diff_map(fm, prvpf, prvf_linesize, nxtpf, nxtf_linesize,
mapp, map_linesize, height, width, plane);
else
build_diff_map(fm, prvnf, prvf_linesize, nxtnf, nxtf_linesize,
mapp + map_linesize, map_linesize, height, width, plane);
for (y = 2; y < height - 2; y += 2) {
if (y0a == y1a || y < y0a || y > y1a) {
for (x = startx; x < stopx; x++) {
if (mapp[x] > 0 || mapp[x + map_linesize] > 0) {
temp1 = srcpf[x] + (srcf[x] << 2) + srcnf[x]; // [1 4 1]
temp2 = abs(3 * (prvpf[x] + prvnf[x]) - temp1);
if (temp2 > 23 && ((mapp[x]&1) || (mapp[x + map_linesize]&1)))
accumPc += temp2;
if (temp2 > 42) {
if ((mapp[x]&2) || (mapp[x + map_linesize]&2))
accumPm += temp2;
if ((mapp[x]&4) || (mapp[x + map_linesize]&4))
accumPml += temp2;
}
temp2 = abs(3 * (nxtpf[x] + nxtnf[x]) - temp1);
if (temp2 > 23 && ((mapp[x]&1) || (mapp[x + map_linesize]&1)))
accumNc += temp2;
if (temp2 > 42) {
if ((mapp[x]&2) || (mapp[x + map_linesize]&2))
accumNm += temp2;
if ((mapp[x]&4) || (mapp[x + map_linesize]&4))
accumNml += temp2;
}
}
}
}
prvpf += prvf_linesize;
prvnf += prvf_linesize;
srcpf += srcf_linesize;
srcf += srcf_linesize;
srcnf += srcf_linesize;
nxtpf += nxtf_linesize;
nxtnf += nxtf_linesize;
mapp += map_linesize;
}
}
if (accumPm < 500 && accumNm < 500 && (accumPml >= 500 || accumNml >= 500) &&
FFMAX(accumPml,accumNml) > 3*FFMIN(accumPml,accumNml)) {
accumPm = accumPml;
accumNm = accumNml;
}
norm1 = (int)((accumPc / 6.0f) + 0.5f);
norm2 = (int)((accumNc / 6.0f) + 0.5f);
mtn1 = (int)((accumPm / 6.0f) + 0.5f);
mtn2 = (int)((accumNm / 6.0f) + 0.5f);
c1 = ((float)FFMAX(norm1,norm2)) / ((float)FFMAX(FFMIN(norm1,norm2),1));
c2 = ((float)FFMAX(mtn1, mtn2)) / ((float)FFMAX(FFMIN(mtn1, mtn2), 1));
mr = ((float)FFMAX(mtn1, mtn2)) / ((float)FFMAX(FFMAX(norm1,norm2),1));
if (((mtn1 >= 500 || mtn2 >= 500) && (mtn1*2 < mtn2*1 || mtn2*2 < mtn1*1)) ||
((mtn1 >= 1000 || mtn2 >= 1000) && (mtn1*3 < mtn2*2 || mtn2*3 < mtn1*2)) ||
((mtn1 >= 2000 || mtn2 >= 2000) && (mtn1*5 < mtn2*4 || mtn2*5 < mtn1*4)) ||
((mtn1 >= 4000 || mtn2 >= 4000) && c2 > c1))
ret = mtn1 > mtn2 ? match2 : match1;
else if (mr > 0.005 && FFMAX(mtn1, mtn2) > 150 && (mtn1*2 < mtn2*1 || mtn2*2 < mtn1*1))
ret = mtn1 > mtn2 ? match2 : match1;
else
ret = norm1 > norm2 ? match2 : match1;
return ret;
}
static void copy_fields(const FieldMatchContext *fm, AVFrame *dst,
const AVFrame *src, int field)
{
int plane;
for (plane = 0; plane < 4 && src->data[plane] && src->linesize[plane]; plane++) {
const int plane_h = get_height(fm, src, plane);
const int nb_copy_fields = (plane_h >> 1) + (field ? 0 : (plane_h & 1));
av_image_copy_plane(dst->data[plane] + field*dst->linesize[plane], dst->linesize[plane] << 1,
src->data[plane] + field*src->linesize[plane], src->linesize[plane] << 1,
get_width(fm, src, plane) * fm->bpc, nb_copy_fields);
}
}
static AVFrame *create_weave_frame(AVFilterContext *ctx, int match, int field,
const AVFrame *prv, AVFrame *src, const AVFrame *nxt)
{
AVFrame *dst;
FieldMatchContext *fm = ctx->priv;
if (match == mC) {
dst = av_frame_clone(src);
} else {
AVFilterLink *outlink = ctx->outputs[0];
dst = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!dst)
return NULL;
av_frame_copy_props(dst, src);
switch (match) {
case mP: copy_fields(fm, dst, src, 1-field); copy_fields(fm, dst, prv, field); break;
case mN: copy_fields(fm, dst, src, 1-field); copy_fields(fm, dst, nxt, field); break;
case mB: copy_fields(fm, dst, src, field); copy_fields(fm, dst, prv, 1-field); break;
case mU: copy_fields(fm, dst, src, field); copy_fields(fm, dst, nxt, 1-field); break;
default: av_assert0(0);
}
}
return dst;
}
static int checkmm(AVFilterContext *ctx, int *combs, int m1, int m2,
AVFrame **gen_frames, int field)
{
const FieldMatchContext *fm = ctx->priv;
#define LOAD_COMB(mid) do { \
if (combs[mid] < 0) { \
if (!gen_frames[mid]) \
gen_frames[mid] = create_weave_frame(ctx, mid, field, \
fm->prv, fm->src, fm->nxt); \
combs[mid] = calc_combed_score(fm, gen_frames[mid]); \
} \
} while (0)
LOAD_COMB(m1);
LOAD_COMB(m2);
if ((combs[m2] * 3 < combs[m1] || (combs[m2] * 2 < combs[m1] && combs[m1] > fm->combpel)) &&
abs(combs[m2] - combs[m1]) >= 30 && combs[m2] < fm->combpel)
return m2;
else
return m1;
}
static const int fxo0m[] = { mP, mC, mN, mB, mU };
static const int fxo1m[] = { mN, mC, mP, mU, mB };
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
FieldMatchContext *fm = ctx->priv;
int combs[] = { -1, -1, -1, -1, -1 };
int order, field, i, match, sc = 0, ret = 0;
const int *fxo;
AVFrame *gen_frames[] = { NULL, NULL, NULL, NULL, NULL };
AVFrame *dst = NULL;
/* update frames queue(s) */
#define SLIDING_FRAME_WINDOW(prv, src, nxt) do { \
if (prv != src) /* 2nd loop exception (1st has prv==src and we don't want to loose src) */ \
av_frame_free(&prv); \
prv = src; \
src = nxt; \
if (in) \
nxt = in; \
if (!prv) \
prv = src; \
if (!prv) /* received only one frame at that point */ \
return 0; \
av_assert0(prv && src && nxt); \
} while (0)
if (FF_INLINK_IDX(inlink) == INPUT_MAIN) {
av_assert0(fm->got_frame[INPUT_MAIN] == 0);
SLIDING_FRAME_WINDOW(fm->prv, fm->src, fm->nxt);
fm->got_frame[INPUT_MAIN] = 1;
} else {
av_assert0(fm->got_frame[INPUT_CLEANSRC] == 0);
SLIDING_FRAME_WINDOW(fm->prv2, fm->src2, fm->nxt2);
fm->got_frame[INPUT_CLEANSRC] = 1;
}
if (!fm->got_frame[INPUT_MAIN] || (fm->ppsrc && !fm->got_frame[INPUT_CLEANSRC]))
return 0;
fm->got_frame[INPUT_MAIN] = fm->got_frame[INPUT_CLEANSRC] = 0;
in = fm->src;
/* parity */
order = fm->order != FM_PARITY_AUTO ? fm->order : (in->interlaced_frame ? in->top_field_first : 1);
field = fm->field != FM_PARITY_AUTO ? fm->field : order;
av_assert0(order == 0 || order == 1 || field == 0 || field == 1);
fxo = field ^ order ? fxo1m : fxo0m;
/* debug mode: we generate all the fields combinations and their associated
* combed score. XXX: inject as frame metadata? */
if (fm->combdbg) {
for (i = 0; i < FF_ARRAY_ELEMS(combs); i++) {
if (i > mN && fm->combdbg == COMBDBG_PCN)
break;
gen_frames[i] = create_weave_frame(ctx, i, field, fm->prv, fm->src, fm->nxt);
if (!gen_frames[i]) {
ret = AVERROR(ENOMEM);
goto fail;
}
combs[i] = calc_combed_score(fm, gen_frames[i]);
}
av_log(ctx, AV_LOG_INFO, "COMBS: %3d %3d %3d %3d %3d\n",
combs[0], combs[1], combs[2], combs[3], combs[4]);
} else {
gen_frames[mC] = av_frame_clone(fm->src);
if (!gen_frames[mC]) {
ret = AVERROR(ENOMEM);
goto fail;
}
}
/* p/c selection and optional 3-way p/c/n matches */
match = compare_fields(fm, fxo[mC], fxo[mP], field);
if (fm->mode == MODE_PCN || fm->mode == MODE_PCN_UB)
match = compare_fields(fm, match, fxo[mN], field);
/* scene change check */
if (fm->combmatch == COMBMATCH_SC) {
if (fm->lastn == outlink->frame_count_in - 1) {
if (fm->lastscdiff > fm->scthresh)
sc = 1;
} else if (luma_abs_diff(fm->prv, fm->src) > fm->scthresh) {
sc = 1;
}
if (!sc) {
fm->lastn = outlink->frame_count_in;
fm->lastscdiff = luma_abs_diff(fm->src, fm->nxt);
sc = fm->lastscdiff > fm->scthresh;
}
}
if (fm->combmatch == COMBMATCH_FULL || (fm->combmatch == COMBMATCH_SC && sc)) {
switch (fm->mode) {
/* 2-way p/c matches */
case MODE_PC:
match = checkmm(ctx, combs, match, match == fxo[mP] ? fxo[mC] : fxo[mP], gen_frames, field);
break;
case MODE_PC_N:
match = checkmm(ctx, combs, match, fxo[mN], gen_frames, field);
break;
case MODE_PC_U:
match = checkmm(ctx, combs, match, fxo[mU], gen_frames, field);
break;
case MODE_PC_N_UB:
match = checkmm(ctx, combs, match, fxo[mN], gen_frames, field);
match = checkmm(ctx, combs, match, fxo[mU], gen_frames, field);
match = checkmm(ctx, combs, match, fxo[mB], gen_frames, field);
break;
/* 3-way p/c/n matches */
case MODE_PCN:
match = checkmm(ctx, combs, match, match == fxo[mP] ? fxo[mC] : fxo[mP], gen_frames, field);
break;
case MODE_PCN_UB:
match = checkmm(ctx, combs, match, fxo[mU], gen_frames, field);
match = checkmm(ctx, combs, match, fxo[mB], gen_frames, field);
break;
default:
av_assert0(0);
}
}
/* get output frame and drop the others */
if (fm->ppsrc) {
/* field matching was based on a filtered/post-processed input, we now
* pick the untouched fields from the clean source */
dst = create_weave_frame(ctx, match, field, fm->prv2, fm->src2, fm->nxt2);
} else {
if (!gen_frames[match]) { // XXX: is that possible?
dst = create_weave_frame(ctx, match, field, fm->prv, fm->src, fm->nxt);
} else {
dst = gen_frames[match];
gen_frames[match] = NULL;
}
}
if (!dst) {
ret = AVERROR(ENOMEM);
goto fail;
}
/* mark the frame we are unable to match properly as interlaced so a proper
* de-interlacer can take the relay */
dst->interlaced_frame = combs[match] >= fm->combpel;
if (dst->interlaced_frame) {
av_log(ctx, AV_LOG_WARNING, "Frame #%"PRId64" at %s is still interlaced\n",
outlink->frame_count_in, av_ts2timestr(in->pts, &inlink->time_base));
dst->top_field_first = field;
}
av_log(ctx, AV_LOG_DEBUG, "SC:%d | COMBS: %3d %3d %3d %3d %3d (combpel=%d)"
" match=%d combed=%s\n", sc, combs[0], combs[1], combs[2], combs[3], combs[4],
fm->combpel, match, dst->interlaced_frame ? "YES" : "NO");
fail:
for (i = 0; i < FF_ARRAY_ELEMS(gen_frames); i++)
av_frame_free(&gen_frames[i]);
if (ret >= 0)
return ff_filter_frame(outlink, dst);
return ret;
}
static int activate(AVFilterContext *ctx)
{
FieldMatchContext *fm = ctx->priv;
AVFrame *frame = NULL;
int ret = 0, status;
int64_t pts;
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
if ((fm->got_frame[INPUT_MAIN] == 0) &&
(ret = ff_inlink_consume_frame(ctx->inputs[INPUT_MAIN], &frame)) > 0) {
ret = filter_frame(ctx->inputs[INPUT_MAIN], frame);
if (ret < 0)
return ret;
}
if (ret < 0)
return ret;
if (fm->ppsrc &&
(fm->got_frame[INPUT_CLEANSRC] == 0) &&
(ret = ff_inlink_consume_frame(ctx->inputs[INPUT_CLEANSRC], &frame)) > 0) {
ret = filter_frame(ctx->inputs[INPUT_CLEANSRC], frame);
if (ret < 0)
return ret;
}
if (ret < 0) {
return ret;
} else if (ff_inlink_acknowledge_status(ctx->inputs[INPUT_MAIN], &status, &pts)) {
if (status == AVERROR_EOF) { // flushing
fm->eof |= 1 << INPUT_MAIN;
ret = filter_frame(ctx->inputs[INPUT_MAIN], NULL);
}
ff_outlink_set_status(ctx->outputs[0], status, pts);
return ret;
} else if (fm->ppsrc && ff_inlink_acknowledge_status(ctx->inputs[INPUT_CLEANSRC], &status, &pts)) {
if (status == AVERROR_EOF) { // flushing
fm->eof |= 1 << INPUT_CLEANSRC;
ret = filter_frame(ctx->inputs[INPUT_CLEANSRC], NULL);
}
ff_outlink_set_status(ctx->outputs[0], status, pts);
return ret;
} else {
if (ff_outlink_frame_wanted(ctx->outputs[0])) {
if (fm->got_frame[INPUT_MAIN] == 0)
ff_inlink_request_frame(ctx->inputs[INPUT_MAIN]);
if (fm->ppsrc && (fm->got_frame[INPUT_CLEANSRC] == 0))
ff_inlink_request_frame(ctx->inputs[INPUT_CLEANSRC]);
}
return 0;
}
}
static int query_formats(AVFilterContext *ctx)
{
FieldMatchContext *fm = ctx->priv;
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat unproc_pix_fmts[] = {
AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUVJ411P,
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUV440P10,
AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_NONE
};
int ret;
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
if (!fmts_list)
return AVERROR(ENOMEM);
if (!fm->ppsrc) {
return ff_set_common_formats(ctx, fmts_list);
}
if ((ret = ff_formats_ref(fmts_list, &ctx->inputs[INPUT_MAIN]->outcfg.formats)) < 0)
return ret;
fmts_list = ff_make_format_list(unproc_pix_fmts);
if (!fmts_list)
return AVERROR(ENOMEM);
if ((ret = ff_formats_ref(fmts_list, &ctx->outputs[0]->incfg.formats)) < 0)
return ret;
if ((ret = ff_formats_ref(fmts_list, &ctx->inputs[INPUT_CLEANSRC]->outcfg.formats)) < 0)
return ret;
return 0;
}
static int config_input(AVFilterLink *inlink)
{
int ret;
AVFilterContext *ctx = inlink->dst;
FieldMatchContext *fm = ctx->priv;
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
const int w = inlink->w;
const int h = inlink->h;
fm->scthresh = (int64_t)((w * h * 255.0 * fm->scthresh_flt) / 100.0);
if ((ret = av_image_alloc(fm->map_data, fm->map_linesize, w, h, inlink->format, 32)) < 0 ||
(ret = av_image_alloc(fm->cmask_data, fm->cmask_linesize, w, h, inlink->format, 32)) < 0)
return ret;
fm->hsub = pix_desc->log2_chroma_w;
fm->vsub = pix_desc->log2_chroma_h;
fm->tpitchy = FFALIGN(w, 16);
fm->tpitchuv = FFALIGN(w >> 1, 16);
fm->tbuffer = av_calloc((h/2 + 4) * fm->tpitchy, sizeof(*fm->tbuffer));
fm->c_array = av_malloc_array((((w + fm->blockx/2)/fm->blockx)+1) *
(((h + fm->blocky/2)/fm->blocky)+1),
4 * sizeof(*fm->c_array));
if (!fm->tbuffer || !fm->c_array)
return AVERROR(ENOMEM);
return 0;
}
static av_cold int fieldmatch_init(AVFilterContext *ctx)
{
const FieldMatchContext *fm = ctx->priv;
AVFilterPad pad = {
.name = "main",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
};
int ret;
if ((ret = ff_append_inpad(ctx, &pad)) < 0)
return ret;
if (fm->ppsrc) {
pad.name = "clean_src";
pad.config_props = NULL;
if ((ret = ff_append_inpad(ctx, &pad)) < 0)
return ret;
}
if ((fm->blockx & (fm->blockx - 1)) ||
(fm->blocky & (fm->blocky - 1))) {
av_log(ctx, AV_LOG_ERROR, "blockx and blocky settings must be power of two\n");
return AVERROR(EINVAL);
}
if (fm->combpel > fm->blockx * fm->blocky) {
av_log(ctx, AV_LOG_ERROR, "Combed pixel should not be larger than blockx x blocky\n");
return AVERROR(EINVAL);
}
return 0;
}
static av_cold void fieldmatch_uninit(AVFilterContext *ctx)
{
FieldMatchContext *fm = ctx->priv;
if (fm->prv != fm->src)
av_frame_free(&fm->prv);
if (fm->nxt != fm->src)
av_frame_free(&fm->nxt);
if (fm->prv2 != fm->src2)
av_frame_free(&fm->prv2);
if (fm->nxt2 != fm->src2)
av_frame_free(&fm->nxt2);
av_frame_free(&fm->src);
av_frame_free(&fm->src2);
av_freep(&fm->map_data[0]);
av_freep(&fm->cmask_data[0]);
av_freep(&fm->tbuffer);
av_freep(&fm->c_array);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
FieldMatchContext *fm = ctx->priv;
const AVFilterLink *inlink =
ctx->inputs[fm->ppsrc ? INPUT_CLEANSRC : INPUT_MAIN];
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
fm->bpc = (desc->comp[0].depth + 7) / 8;
outlink->time_base = inlink->time_base;
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
outlink->frame_rate = inlink->frame_rate;
outlink->w = inlink->w;
outlink->h = inlink->h;
return 0;
}
static const AVFilterPad fieldmatch_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_vf_fieldmatch = {
.name = "fieldmatch",
.description = NULL_IF_CONFIG_SMALL("Field matching for inverse telecine."),
.priv_size = sizeof(FieldMatchContext),
.init = fieldmatch_init,
.activate = activate,
.uninit = fieldmatch_uninit,
.inputs = NULL,
FILTER_OUTPUTS(fieldmatch_outputs),
FILTER_QUERY_FUNC(query_formats),
.priv_class = &fieldmatch_class,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
};
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