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FFmpeg/libavfilter/vf_fieldmatch.c

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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 (VapouSsynth) 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 "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 {
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
uint32_t eof; ///< bitmask for end of stream
int64_t lastscdiff;
int64_t lastn;
/* options */
int order;
int ppsrc;
enum matching_mode mode;
int field;
int mchroma;
int y0, y1;
int64_t scthresh;
double scthresh_flt;
enum comb_matching_mode combmatch;
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_INT, {.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_INT, {.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_INT, {.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 ? f->width >> fm->hsub : f->width;
}
static int get_height(const FieldMatchContext *fm, const AVFrame *f, int plane)
{
return plane ? 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 = src->width >> fm->hsub;
const int height = 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 != 0);
const int y1a = fm->y1 >> (plane != 0);
const int startx = (plane == 0 ? 8 : 4);
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]; plane++)
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), get_height(fm, src, plane) / 2);
}
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;
const int *fxo;
AVFrame *gen_frames[] = { NULL, NULL, NULL, NULL, NULL };
AVFrame *dst;
/* 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) {
SLIDING_FRAME_WINDOW(fm->prv, fm->src, fm->nxt);
fm->got_frame[INPUT_MAIN] = 1;
} else {
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])
return AVERROR(ENOMEM);
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])
return AVERROR(ENOMEM);
}
/* 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 - 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;
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)
return AVERROR(ENOMEM);
for (i = 0; i < FF_ARRAY_ELEMS(gen_frames); i++)
av_frame_free(&gen_frames[i]);
/* 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, 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");
return ff_filter_frame(outlink, dst);
}
static int request_inlink(AVFilterContext *ctx, int lid)
{
int ret = 0;
FieldMatchContext *fm = ctx->priv;
if (!fm->got_frame[lid]) {
AVFilterLink *inlink = ctx->inputs[lid];
ret = ff_request_frame(inlink);
if (ret == AVERROR_EOF) { // flushing
fm->eof |= 1 << lid;
ret = filter_frame(inlink, NULL);
}
}
return ret;
}
static int request_frame(AVFilterLink *outlink)
{
int ret;
AVFilterContext *ctx = outlink->src;
FieldMatchContext *fm = ctx->priv;
const uint32_t eof_mask = 1<<INPUT_MAIN | fm->ppsrc<<INPUT_CLEANSRC;
if ((fm->eof & eof_mask) == eof_mask) // flush done?
return AVERROR_EOF;
if ((ret = request_inlink(ctx, INPUT_MAIN)) < 0)
return ret;
if (fm->ppsrc && (ret = request_inlink(ctx, INPUT_CLEANSRC)) < 0)
return ret;
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
// TODO: second input source can support >8bit depth
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
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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_malloc(h/2 * fm->tpitchy);
fm->c_array = av_malloc((((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 = av_strdup("main"),
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
};
if (!pad.name)
return AVERROR(ENOMEM);
ff_insert_inpad(ctx, INPUT_MAIN, &pad);
if (fm->ppsrc) {
pad.name = av_strdup("clean_src");
pad.config_props = NULL;
if (!pad.name)
return AVERROR(ENOMEM);
ff_insert_inpad(ctx, INPUT_CLEANSRC, &pad);
}
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)
{
int i;
FieldMatchContext *fm = ctx->priv;
if (fm->prv != fm->src)
av_frame_free(&fm->prv);
if (fm->nxt != fm->src)
av_frame_free(&fm->nxt);
av_frame_free(&fm->src);
av_freep(&fm->map_data[0]);
av_freep(&fm->cmask_data[0]);
av_freep(&fm->tbuffer);
av_freep(&fm->c_array);
for (i = 0; i < ctx->nb_inputs; i++)
av_freep(&ctx->input_pads[i].name);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
const FieldMatchContext *fm = ctx->priv;
const AVFilterLink *inlink =
ctx->inputs[fm->ppsrc ? INPUT_CLEANSRC : INPUT_MAIN];
outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
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,
.request_frame = request_frame,
.config_props = config_output,
},
{ NULL }
};
AVFilter avfilter_vf_fieldmatch = {
.name = "fieldmatch",
.description = NULL_IF_CONFIG_SMALL("Field matching for inverse telecine."),
.query_formats = query_formats,
.priv_size = sizeof(FieldMatchContext),
.init = fieldmatch_init,
.uninit = fieldmatch_uninit,
.inputs = NULL,
.outputs = fieldmatch_outputs,
.priv_class = &fieldmatch_class,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
};
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