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Diffstat (limited to 'libavfilter/vf_fieldmatch.c')
| -rw-r--r-- | libavfilter/vf_fieldmatch.c | 984 |
1 files changed, 984 insertions, 0 deletions
diff --git a/libavfilter/vf_fieldmatch.c b/libavfilter/vf_fieldmatch.c new file mode 100644 index 0000000000..89c4909a3d --- /dev/null +++ b/libavfilter/vf_fieldmatch.c @@ -0,0 +1,984 @@ +/* + * 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 ? FF_CEIL_RSHIFT(f->width, fm->hsub) : f->width; +} + +static int get_height(const FieldMatchContext *fm, const AVFrame *f, int plane) +{ + return plane ? FF_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 = FF_CEIL_RSHIFT(src->width, fm->hsub); + const int height = FF_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 != 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] && src->linesize[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, +}; |