--- /dev/null
+/*
+ * This file is part of FFmpeg.
+ *
+ * Copyright (c) 2011, 2012 Hyllian/Jararaca <sergiogdb@gmail.com>
+ * Copyright (c) 2014 Arwa Arif <arwaarif1994@gmail.com>
+ *
+ * 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
+ * XBR Filter is used for depixelization of image.
+ * This is based on Hyllian's xBR shader.
+ *
+ * @see http://www.libretro.com/forums/viewtopic.php?f=6&t=134
+ * @see https://github.com/yoyofr/iFBA/blob/master/fba_src/src/intf/video/scalers/xbr.cpp
+ */
+
+#include "libavutil/opt.h"
+#include "libavutil/avassert.h"
+#include "libavutil/pixdesc.h"
+#include "internal.h"
+
+#define RGB_MASK 0x00FFFFFF
+#define LB_MASK 0x00FEFEFE
+#define RED_BLUE_MASK 0x00FF00FF
+#define GREEN_MASK 0x0000FF00
+
+typedef int (*xbrfunc_t)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
+
+typedef struct {
+ const AVClass *class;
+ int n;
+ xbrfunc_t func;
+ uint32_t rgbtoyuv[1<<24];
+} XBRContext;
+
+typedef struct ThreadData {
+ AVFrame *in, *out;
+ const uint32_t *rgbtoyuv;
+} ThreadData;
+
+#define OFFSET(x) offsetof(XBRContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+static const AVOption xbr_options[] = {
+ { "n", "set scale factor", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 3}, 2, 4, .flags = FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(xbr);
+
+static uint32_t pixel_diff(uint32_t x, uint32_t y, const uint32_t *r2y)
+{
+#define YMASK 0xff0000
+#define UMASK 0x00ff00
+#define VMASK 0x0000ff
+
+ uint32_t yuv1 = r2y[x & 0xffffff];
+ uint32_t yuv2 = r2y[y & 0xffffff];
+
+ return (abs((yuv1 & YMASK) - (yuv2 & YMASK)) >> 16) +
+ (abs((yuv1 & UMASK) - (yuv2 & UMASK)) >> 8) +
+ abs((yuv1 & VMASK) - (yuv2 & VMASK));
+}
+
+#define ALPHA_BLEND_128_W(dst, src) dst = ((src & LB_MASK) >> 1) + ((dst & LB_MASK) >> 1)
+
+#define ALPHA_BLEND_32_W(dst, src) \
+ dst = ((RED_BLUE_MASK & ((dst & RED_BLUE_MASK) + ((((src & RED_BLUE_MASK) - \
+ (dst & RED_BLUE_MASK))) >> 3))) | (GREEN_MASK & ((dst & GREEN_MASK) + \
+ ((((src & GREEN_MASK) - (dst & GREEN_MASK))) >> 3))))
+
+#define ALPHA_BLEND_64_W(dst, src) \
+ dst = ((RED_BLUE_MASK & ((dst & RED_BLUE_MASK) + ((((src & RED_BLUE_MASK) - \
+ (dst & RED_BLUE_MASK))) >> 2))) | (GREEN_MASK & ((dst & GREEN_MASK) + \
+ ((((src & GREEN_MASK) - (dst & GREEN_MASK))) >> 2))))
+
+#define ALPHA_BLEND_192_W(dst, src) \
+ dst = ((RED_BLUE_MASK & ((dst & RED_BLUE_MASK) + ((((src & RED_BLUE_MASK) - \
+ (dst & RED_BLUE_MASK)) * 3) >> 2))) | (GREEN_MASK & ((dst & GREEN_MASK) + \
+ ((((src & GREEN_MASK) - (dst & GREEN_MASK)) * 3) >> 2))))
+
+#define ALPHA_BLEND_224_W(dst, src) \
+ dst = ((RED_BLUE_MASK & ((dst & RED_BLUE_MASK) + ((((src & RED_BLUE_MASK) - \
+ (dst & RED_BLUE_MASK)) * 7) >> 3))) | (GREEN_MASK & ((dst & GREEN_MASK) + \
+ ((((src & GREEN_MASK) - (dst & GREEN_MASK)) * 7) >> 3))))
+
+#define df(A, B) pixel_diff(A, B, r2y)
+#define eq(A, B) (df(A, B) < 155)
+
+#define FILT2(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, \
+ N0, N1, N2, N3) do { \
+ if (PE != PH && PE != PF) { \
+ const unsigned e = df(PE,PC) + df(PE,PG) + df(PI,H5) + df(PI,F4) + (df(PH,PF)<<2); \
+ const unsigned i = df(PH,PD) + df(PH,I5) + df(PF,I4) + df(PF,PB) + (df(PE,PI)<<2); \
+ if (e < i && (!eq(PF,PB) && !eq(PH,PD) || eq(PE,PI) \
+ && (!eq(PF,I4) && !eq(PH,I5)) \
+ || eq(PE,PG) || eq(PE,PC))) { \
+ const unsigned ke = df(PF,PG); \
+ const unsigned ki = df(PH,PC); \
+ const int left = ke<<1 <= ki && PE != PG && PD != PG; \
+ const int up = ke >= ki<<1 && PE != PC && PB != PC; \
+ const unsigned px = df(PE,PF) <= df(PE,PH) ? PF : PH; \
+ if (left && up) { \
+ ALPHA_BLEND_224_W(E[N3], px); \
+ ALPHA_BLEND_64_W( E[N2], px); \
+ E[N1] = E[N2]; \
+ } else if (left) { \
+ ALPHA_BLEND_192_W(E[N3], px); \
+ ALPHA_BLEND_64_W( E[N2], px); \
+ } else if (up) { \
+ ALPHA_BLEND_192_W(E[N3], px); \
+ ALPHA_BLEND_64_W( E[N1], px); \
+ } else { /* diagonal */ \
+ ALPHA_BLEND_128_W(E[N3], px); \
+ } \
+ } else if (e <= i) { \
+ ALPHA_BLEND_128_W( E[N3], ((df(PE,PF) <= df(PE,PH)) ? PF : PH)); \
+ } \
+ } \
+} while (0)
+
+#define FILT3(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, \
+ N0, N1, N2, N3, N4, N5, N6, N7, N8) do { \
+ if (PE != PH && PE != PF) { \
+ const unsigned e = df(PE,PC) + df(PE,PG) + df(PI,H5) + df(PI,F4) + (df(PH,PF)<<2); \
+ const unsigned i = df(PH,PD) + df(PH,I5) + df(PF,I4) + df(PF,PB) + (df(PE,PI)<<2); \
+ if (e < i && (!eq(PF,PB) && !eq(PF,PC) || !eq(PH,PD) && !eq(PH,PG) || eq(PE,PI) \
+ && (!eq(PF,F4) && !eq(PF,I4) || !eq(PH,H5) && !eq(PH,I5)) \
+ || eq(PE,PG) || eq(PE,PC))) { \
+ const unsigned ke = df(PF,PG); \
+ const unsigned ki = df(PH,PC); \
+ const int left = ke<<1 <= ki && PE != PG && PD != PG; \
+ const int up = ke >= ki<<1 && PE != PC && PB != PC; \
+ const unsigned px = df(PE,PF) <= df(PE,PH) ? PF : PH; \
+ if (left && up) { \
+ ALPHA_BLEND_192_W(E[N7], px); \
+ ALPHA_BLEND_64_W( E[N6], px); \
+ E[N5] = E[N7]; \
+ E[N2] = E[N6]; \
+ E[N8] = px; \
+ } else if (left) { \
+ ALPHA_BLEND_192_W(E[N7], px); \
+ ALPHA_BLEND_64_W( E[N5], px); \
+ ALPHA_BLEND_64_W( E[N6], px); \
+ E[N8] = px; \
+ } else if (up) { \
+ ALPHA_BLEND_192_W(E[N5], px); \
+ ALPHA_BLEND_64_W( E[N7], px); \
+ ALPHA_BLEND_64_W( E[N2], px); \
+ E[N8] = px; \
+ } else { /* diagonal */ \
+ ALPHA_BLEND_224_W(E[N8], px); \
+ ALPHA_BLEND_32_W( E[N5], px); \
+ ALPHA_BLEND_32_W( E[N7], px); \
+ } \
+ } else if (e <= i) { \
+ ALPHA_BLEND_128_W(E[N8], ((df(PE,PF) <= df(PE,PH)) ? PF : PH)); \
+ } \
+ } \
+} while (0)
+
+#define FILT4(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, \
+ N15, N14, N11, N3, N7, N10, N13, N12, N9, N6, N2, N1, N5, N8, N4, N0) do { \
+ if (PE != PH && PE != PF) { \
+ const unsigned e = df(PE,PC) + df(PE,PG) + df(PI,H5) + df(PI,F4) + (df(PH,PF)<<2); \
+ const unsigned i = df(PH,PD) + df(PH,I5) + df(PF,I4) + df(PF,PB) + (df(PE,PI)<<2); \
+ if (e < i && (!eq(PF,PB) && !eq(PH,PD) || eq(PE,PI) \
+ && (!eq(PF,I4) && !eq(PH,I5)) \
+ || eq(PE,PG) || eq(PE,PC))) { \
+ const unsigned ke = df(PF,PG); \
+ const unsigned ki = df(PH,PC); \
+ const int left = ke<<1 <= ki && PE != PG && PD != PG; \
+ const int up = ke >= ki<<1 && PE != PC && PB != PC; \
+ const unsigned px = df(PE,PF) <= df(PE,PH) ? PF : PH; \
+ if (left && up) { \
+ ALPHA_BLEND_192_W(E[N13], px); \
+ ALPHA_BLEND_64_W( E[N12], px); \
+ E[N15] = E[N14] = E[N11] = px; \
+ E[N10] = E[N3] = E[N12]; \
+ E[N7] = E[N13]; \
+ } else if (left) { \
+ ALPHA_BLEND_192_W(E[N11], px); \
+ ALPHA_BLEND_192_W(E[N13], px); \
+ ALPHA_BLEND_64_W( E[N10], px); \
+ ALPHA_BLEND_64_W( E[N12], px); \
+ E[N14] = px; \
+ E[N15] = px; \
+ } else if (up) { \
+ ALPHA_BLEND_192_W(E[N14], px); \
+ ALPHA_BLEND_192_W(E[N7 ], px); \
+ ALPHA_BLEND_64_W( E[N10], px); \
+ ALPHA_BLEND_64_W( E[N3 ], px); \
+ E[N11] = px; \
+ E[N15] = px; \
+ } else { /* diagonal */ \
+ ALPHA_BLEND_128_W(E[N11], px); \
+ ALPHA_BLEND_128_W(E[N14], px); \
+ E[N15] = px; \
+ } \
+ } else if (e <= i) { \
+ ALPHA_BLEND_128_W( E[N15], ((df(PE,PF) <= df(PE,PH)) ? PF : PH)); \
+ } \
+ } \
+} while (0)
+
+static av_always_inline void xbr_filter(const ThreadData *td, int jobnr, int nb_jobs, int n)
+{
+ int x, y;
+ const AVFrame *input = td->in;
+ AVFrame *output = td->out;
+ const uint32_t *r2y = td->rgbtoyuv;
+ const int slice_start = (input->height * jobnr ) / nb_jobs;
+ const int slice_end = (input->height * (jobnr+1)) / nb_jobs;
+ const int nl = output->linesize[0] >> 2;
+ const int nl1 = nl + nl;
+ const int nl2 = nl1 + nl;
+
+ for (y = slice_start; y < slice_end; y++) {
+
+ uint32_t *E = (uint32_t *)(output->data[0] + y * output->linesize[0] * n);
+ const uint32_t *sa2 = (uint32_t *)(input->data[0] + y * input->linesize[0] - 8); /* center */
+ const uint32_t *sa1 = sa2 - (input->linesize[0]>>2); /* up x1 */
+ const uint32_t *sa0 = sa1 - (input->linesize[0]>>2); /* up x2 */
+ const uint32_t *sa3 = sa2 + (input->linesize[0]>>2); /* down x1 */
+ const uint32_t *sa4 = sa3 + (input->linesize[0]>>2); /* down x2 */
+
+ if (y <= 1) {
+ sa0 = sa1;
+ if (y == 0) {
+ sa0 = sa1 = sa2;
+ }
+ }
+
+ if (y >= input->height - 2) {
+ sa4 = sa3;
+ if (y == input->height - 1) {
+ sa4 = sa3 = sa2;
+ }
+ }
+
+ for (x = 0; x < input->width; x++) {
+ const uint32_t B1 = sa0[2];
+ const uint32_t PB = sa1[2];
+ const uint32_t PE = sa2[2];
+ const uint32_t PH = sa3[2];
+ const uint32_t H5 = sa4[2];
+
+ const int pprev = 2 - (x > 0);
+ const uint32_t A1 = sa0[pprev];
+ const uint32_t PA = sa1[pprev];
+ const uint32_t PD = sa2[pprev];
+ const uint32_t PG = sa3[pprev];
+ const uint32_t G5 = sa4[pprev];
+
+ const int pprev2 = pprev - (x > 1);
+ const uint32_t A0 = sa1[pprev2];
+ const uint32_t D0 = sa2[pprev2];
+ const uint32_t G0 = sa3[pprev2];
+
+ const int pnext = 3 - (x == input->width - 1);
+ const uint32_t C1 = sa0[pnext];
+ const uint32_t PC = sa1[pnext];
+ const uint32_t PF = sa2[pnext];
+ const uint32_t PI = sa3[pnext];
+ const uint32_t I5 = sa4[pnext];
+
+ const int pnext2 = pnext + 1 - (x >= input->width - 2);
+ const uint32_t C4 = sa1[pnext2];
+ const uint32_t F4 = sa2[pnext2];
+ const uint32_t I4 = sa3[pnext2];
+
+ if (n == 2) {
+ E[0] = E[1] = // 0, 1
+ E[nl] = E[nl + 1] = PE; // 2, 3
+
+ FILT2(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, 0, 1, nl, nl+1);
+ FILT2(PE, PC, PF, PB, PI, PA, PH, PD, PG, I4, A1, I5, H5, A0, D0, B1, C1, F4, C4, G5, G0, nl, 0, nl+1, 1);
+ FILT2(PE, PA, PB, PD, PC, PG, PF, PH, PI, C1, G0, C4, F4, G5, H5, D0, A0, B1, A1, I4, I5, nl+1, nl, 1, 0);
+ FILT2(PE, PG, PD, PH, PA, PI, PB, PF, PC, A0, I5, A1, B1, I4, F4, H5, G5, D0, G0, C1, C4, 1, nl+1, 0, nl);
+ } else if (n == 3) {
+ E[0] = E[1] = E[2] = // 0, 1, 2
+ E[nl] = E[nl+1] = E[nl+2] = // 3, 4, 5
+ E[nl1] = E[nl1+1] = E[nl1+2] = PE; // 6, 7, 8
+
+ FILT3(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, 0, 1, 2, nl, nl+1, nl+2, nl1, nl1+1, nl1+2);
+ FILT3(PE, PC, PF, PB, PI, PA, PH, PD, PG, I4, A1, I5, H5, A0, D0, B1, C1, F4, C4, G5, G0, nl1, nl, 0, nl1+1, nl+1, 1, nl1+2, nl+2, 2);
+ FILT3(PE, PA, PB, PD, PC, PG, PF, PH, PI, C1, G0, C4, F4, G5, H5, D0, A0, B1, A1, I4, I5, nl1+2, nl1+1, nl1, nl+2, nl+1, nl, 2, 1, 0);
+ FILT3(PE, PG, PD, PH, PA, PI, PB, PF, PC, A0, I5, A1, B1, I4, F4, H5, G5, D0, G0, C1, C4, 2, nl+2, nl1+2, 1, nl+1, nl1+1, 0, nl, nl1);
+ } else if (n == 4) {
+ E[0] = E[1] = E[2] = E[3] = // 0, 1, 2, 3
+ E[nl] = E[nl+1] = E[nl+2] = E[nl+3] = // 4, 5, 6, 7
+ E[nl1] = E[nl1+1] = E[nl1+2] = E[nl1+3] = // 8, 9, 10, 11
+ E[nl2] = E[nl2+1] = E[nl2+2] = E[nl2+3] = PE; // 12, 13, 14, 15
+
+ FILT4(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, nl2+3, nl2+2, nl1+3, 3, nl+3, nl1+2, nl2+1, nl2, nl1+1, nl+2, 2, 1, nl+1, nl1, nl, 0);
+ FILT4(PE, PC, PF, PB, PI, PA, PH, PD, PG, I4, A1, I5, H5, A0, D0, B1, C1, F4, C4, G5, G0, 3, nl+3, 2, 0, 1, nl+2, nl1+3, nl2+3, nl1+2, nl+1, nl, nl1, nl1+1, nl2+2, nl2+1, nl2);
+ FILT4(PE, PA, PB, PD, PC, PG, PF, PH, PI, C1, G0, C4, F4, G5, H5, D0, A0, B1, A1, I4, I5, 0, 1, nl, nl2, nl1, nl+1, 2, 3, nl+2, nl1+1, nl2+1, nl2+2, nl1+2, nl+3, nl1+3, nl2+3);
+ FILT4(PE, PG, PD, PH, PA, PI, PB, PF, PC, A0, I5, A1, B1, I4, F4, H5, G5, D0, G0, C1, C4, nl2, nl1, nl2+1, nl2+3, nl2+2, nl1+1, nl, 0, nl+1, nl1+2, nl1+3, nl+3, nl+2, 1, 2, 3);
+ }
+
+ sa0 += 1;
+ sa1 += 1;
+ sa2 += 1;
+ sa3 += 1;
+ sa4 += 1;
+
+ E += n;
+ }
+ }
+}
+
+#define XBR_FUNC(size) \
+static int xbr##size##x(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
+{ \
+ xbr_filter(arg, jobnr, nb_jobs, size); \
+ return 0; \
+}
+
+XBR_FUNC(2)
+XBR_FUNC(3)
+XBR_FUNC(4)
+
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ XBRContext *xbr = ctx->priv;
+ AVFilterLink *inlink = ctx->inputs[0];
+
+ outlink->w = inlink->w * xbr->n;
+ outlink->h = inlink->h * xbr->n;
+ return 0;
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_0RGB32, AV_PIX_FMT_NONE,
+ };
+
+ ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ XBRContext *xbr = ctx->priv;
+ ThreadData td;
+
+ AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+
+ av_frame_copy_props(out, in);
+
+ td.in = in;
+ td.out = out;
+ td.rgbtoyuv = xbr->rgbtoyuv;
+ ctx->internal->execute(ctx, xbr->func, &td, NULL, FFMIN(inlink->h, ctx->graph->nb_threads));
+
+ out->width = outlink->w;
+ out->height = outlink->h;
+
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+
+static int init(AVFilterContext *ctx)
+{
+ XBRContext *xbr = ctx->priv;
+ static const xbrfunc_t xbrfuncs[] = {xbr2x, xbr3x, xbr4x};
+
+ uint32_t c;
+ int bg, rg, g;
+
+ for (bg = -255; bg < 256; bg++) {
+ for (rg = -255; rg < 256; rg++) {
+ const uint32_t u = (uint32_t)((-169*rg + 500*bg)/1000) + 128;
+ const uint32_t v = (uint32_t)(( 500*rg - 81*bg)/1000) + 128;
+ int startg = FFMAX3(-bg, -rg, 0);
+ int endg = FFMIN3(255-bg, 255-rg, 255);
+ uint32_t y = (uint32_t)(( 299*rg + 1000*startg + 114*bg)/1000);
+ c = bg + (rg<<16) + 0x010101 * startg;
+ for (g = startg; g <= endg; g++) {
+ xbr->rgbtoyuv[c] = ((y++) << 16) + (u << 8) + v;
+ c+= 0x010101;
+ }
+ }
+ }
+
+ xbr->func = xbrfuncs[xbr->n - 2];
+ return 0;
+}
+
+static const AVFilterPad xbr_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad xbr_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_xbr = {
+ .name = "xbr",
+ .description = NULL_IF_CONFIG_SMALL("Scale the input using xBR algorithm."),
+ .inputs = xbr_inputs,
+ .outputs = xbr_outputs,
+ .query_formats = query_formats,
+ .priv_size = sizeof(XBRContext),
+ .priv_class = &xbr_class,
+ .init = init,
+ .flags = AVFILTER_FLAG_SLICE_THREADS,
+};
repositories / deb_ffmpeg.git / blobdiff