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-rw-r--r--Changelog1
-rwxr-xr-xconfigure1
-rw-r--r--doc/filters.texi7
-rw-r--r--libavfilter/Makefile1
-rw-r--r--libavfilter/allfilters.c1
-rw-r--r--libavfilter/version.h2
-rw-r--r--libavfilter/vf_super2xsai.c350
7 files changed, 362 insertions, 1 deletions
diff --git a/Changelog b/Changelog
index dbd98bf..e0584b7 100644
--- a/Changelog
+++ b/Changelog
@@ -25,6 +25,7 @@ version next:
- drop support for ffmpeg without libavfilter
- drawtext video filter: fontconfig support
- ffmpeg -benchmark_all option
+- super2xsai filter ported from libmpcodecs
version 0.10:
diff --git a/configure b/configure
index 419d252..3c0cd7b 100755
--- a/configure
+++ b/configure
@@ -1692,6 +1692,7 @@ ocv_filter_deps="libopencv"
pan_filter_deps="swresample"
removelogo_filter_deps="avcodec avformat swscale"
scale_filter_deps="swscale"
+super2xsai_filter_deps="gpl"
tinterlace_filter_deps="gpl"
yadif_filter_deps="gpl"
diff --git a/doc/filters.texi b/doc/filters.texi
index d166445..daf93e7 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -2716,6 +2716,13 @@ For example:
will create two separate outputs from the same input, one cropped and
one padded.
+@section super2xsai
+
+Scale the input by 2x and smooth using the Super2xSaI (Scale and
+Interpolate) pixel art scaling algorithm.
+
+Useful for enlarging pixel art images without reducing sharpness.
+
@section swapuv
Swap U & V plane.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 5f99fe6..ad65c7b 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -94,6 +94,7 @@ OBJS-$(CONFIG_SETTB_FILTER) += vf_settb.o
OBJS-$(CONFIG_SHOWINFO_FILTER) += vf_showinfo.o
OBJS-$(CONFIG_SLICIFY_FILTER) += vf_slicify.o
OBJS-$(CONFIG_SPLIT_FILTER) += vf_split.o
+OBJS-$(CONFIG_SUPER2XSAI_FILTER) += vf_super2xsai.o
OBJS-$(CONFIG_SWAPUV_FILTER) += vf_swapuv.o
OBJS-$(CONFIG_THUMBNAIL_FILTER) += vf_thumbnail.o
OBJS-$(CONFIG_TILE_FILTER) += vf_tile.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index b2aef7b..5241fc0 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -99,6 +99,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (SHOWINFO, showinfo, vf);
REGISTER_FILTER (SLICIFY, slicify, vf);
REGISTER_FILTER (SPLIT, split, vf);
+ REGISTER_FILTER (SUPER2XSAI, super2xsai, vf);
REGISTER_FILTER (SWAPUV, swapuv, vf);
REGISTER_FILTER (THUMBNAIL, thumbnail, vf);
REGISTER_FILTER (TILE, tile, vf);
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 66d6552..1179f3f 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -29,7 +29,7 @@
#include "libavutil/avutil.h"
#define LIBAVFILTER_VERSION_MAJOR 2
-#define LIBAVFILTER_VERSION_MINOR 68
+#define LIBAVFILTER_VERSION_MINOR 69
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
diff --git a/libavfilter/vf_super2xsai.c b/libavfilter/vf_super2xsai.c
new file mode 100644
index 0000000..4406a43
--- /dev/null
+++ b/libavfilter/vf_super2xsai.c
@@ -0,0 +1,350 @@
+/*
+ * Copyright (c) 2010 Niel van der Westhuizen <nielkie@gmail.com>
+ * Copyright (c) 2002 A'rpi
+ * Copyright (c) 1997-2001 ZSNES Team ( zsknight@zsnes.com / _demo_@zsnes.com )
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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
+ * Super 2xSaI video filter
+ * Ported from MPlayer libmpcodecs/vf_2xsai.c.
+ */
+
+#include "libavutil/pixdesc.h"
+#include "libavutil/intreadwrite.h"
+#include "avfilter.h"
+
+typedef struct {
+ /* masks used for two pixels interpolation */
+ uint32_t hi_pixel_mask;
+ uint32_t lo_pixel_mask;
+
+ /* masks used for four pixels interpolation */
+ uint32_t q_hi_pixel_mask;
+ uint32_t q_lo_pixel_mask;
+
+ int bpp; ///< bytes per pixel, pixel stride for each (packed) pixel
+} Super2xSaIContext;
+
+#define GET_RESULT(A, B, C, D) ((A != C || A != D) - (B != C || B != D))
+
+#define INTERPOLATE(A, B) (((A & hi_pixel_mask) >> 1) + ((B & hi_pixel_mask) >> 1) + (A & B & lo_pixel_mask))
+
+#define Q_INTERPOLATE(A, B, C, D) ((A & q_hi_pixel_mask) >> 2) + ((B & q_hi_pixel_mask) >> 2) + ((C & q_hi_pixel_mask) >> 2) + ((D & q_hi_pixel_mask) >> 2) \
+ + ((((A & q_lo_pixel_mask) + (B & q_lo_pixel_mask) + (C & q_lo_pixel_mask) + (D & q_lo_pixel_mask)) >> 2) & q_lo_pixel_mask)
+
+static void super2xsai(AVFilterContext *ctx,
+ uint8_t *src, int src_linesize,
+ uint8_t *dst, int dst_linesize,
+ int width, int height)
+{
+ Super2xSaIContext *sai = ctx->priv;
+ unsigned int x, y;
+ uint32_t color[4][4];
+ unsigned char *src_line[4];
+ const int bpp = sai->bpp;
+ const uint32_t hi_pixel_mask = sai->hi_pixel_mask;
+ const uint32_t lo_pixel_mask = sai->lo_pixel_mask;
+ const uint32_t q_hi_pixel_mask = sai->q_hi_pixel_mask;
+ const uint32_t q_lo_pixel_mask = sai->q_lo_pixel_mask;
+
+ /* Point to the first 4 lines, first line is duplicated */
+ src_line[0] = src;
+ src_line[1] = src;
+ src_line[2] = src + src_linesize*FFMIN(1, height-1);
+ src_line[3] = src + src_linesize*FFMIN(2, height-1);
+
+#define READ_COLOR4(dst, src_line, off) dst = *((const uint32_t *)src_line + off)
+#define READ_COLOR3(dst, src_line, off) dst = AV_RL24 (src_line + 3*off)
+#define READ_COLOR2(dst, src_line, off) dst = *((const uint16_t *)src_line + off)
+
+ /* Initialise the color matrix for this row. */
+ switch (bpp) {
+ case 4:
+ READ_COLOR4(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR4(color[0][2], src_line[0], 1); READ_COLOR4(color[0][3], src_line[0], 2);
+ READ_COLOR4(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR4(color[1][2], src_line[1], 1); READ_COLOR4(color[1][3], src_line[1], 2);
+ READ_COLOR4(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR4(color[2][2], src_line[2], 1); READ_COLOR4(color[2][3], src_line[2], 2);
+ READ_COLOR4(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR4(color[3][2], src_line[3], 1); READ_COLOR4(color[3][3], src_line[3], 2);
+ break;
+ case 3:
+ READ_COLOR3(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR3(color[0][2], src_line[0], 1); READ_COLOR3(color[0][3], src_line[0], 2);
+ READ_COLOR3(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR3(color[1][2], src_line[1], 1); READ_COLOR3(color[1][3], src_line[1], 2);
+ READ_COLOR3(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR3(color[2][2], src_line[2], 1); READ_COLOR3(color[2][3], src_line[2], 2);
+ READ_COLOR3(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR3(color[3][2], src_line[3], 1); READ_COLOR3(color[3][3], src_line[3], 2);
+ break;
+ default:
+ READ_COLOR2(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR2(color[0][2], src_line[0], 1); READ_COLOR2(color[0][3], src_line[0], 2);
+ READ_COLOR2(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR2(color[1][2], src_line[1], 1); READ_COLOR2(color[1][3], src_line[1], 2);
+ READ_COLOR2(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR2(color[2][2], src_line[2], 1); READ_COLOR2(color[2][3], src_line[2], 2);
+ READ_COLOR2(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR2(color[3][2], src_line[3], 1); READ_COLOR2(color[3][3], src_line[3], 2);
+ }
+
+ for (y = 0; y < height; y++) {
+ uint8_t *dst_line[2];
+
+ dst_line[0] = dst + dst_linesize*2*y;
+ dst_line[1] = dst + dst_linesize*(2*y+1);
+
+ for (x = 0; x < width; x++) {
+ uint32_t product1a, product1b, product2a, product2b;
+
+//--------------------------------------- B0 B1 B2 B3 0 1 2 3
+// 4 5* 6 S2 -> 4 5* 6 7
+// 1 2 3 S1 8 9 10 11
+// A0 A1 A2 A3 12 13 14 15
+//--------------------------------------
+ if (color[2][1] == color[1][2] && color[1][1] != color[2][2]) {
+ product2b = color[2][1];
+ product1b = product2b;
+ } else if (color[1][1] == color[2][2] && color[2][1] != color[1][2]) {
+ product2b = color[1][1];
+ product1b = product2b;
+ } else if (color[1][1] == color[2][2] && color[2][1] == color[1][2]) {
+ int r = 0;
+
+ r += GET_RESULT(color[1][2], color[1][1], color[1][0], color[3][1]);
+ r += GET_RESULT(color[1][2], color[1][1], color[2][0], color[0][1]);
+ r += GET_RESULT(color[1][2], color[1][1], color[3][2], color[2][3]);
+ r += GET_RESULT(color[1][2], color[1][1], color[0][2], color[1][3]);
+
+ if (r > 0)
+ product1b = color[1][2];
+ else if (r < 0)
+ product1b = color[1][1];
+ else
+ product1b = INTERPOLATE(color[1][1], color[1][2]);
+
+ product2b = product1b;
+ } else {
+ if (color[1][2] == color[2][2] && color[2][2] == color[3][1] && color[2][1] != color[3][2] && color[2][2] != color[3][0])
+ product2b = Q_INTERPOLATE(color[2][2], color[2][2], color[2][2], color[2][1]);
+ else if (color[1][1] == color[2][1] && color[2][1] == color[3][2] && color[3][1] != color[2][2] && color[2][1] != color[3][3])
+ product2b = Q_INTERPOLATE(color[2][1], color[2][1], color[2][1], color[2][2]);
+ else
+ product2b = INTERPOLATE(color[2][1], color[2][2]);
+
+ if (color[1][2] == color[2][2] && color[1][2] == color[0][1] && color[1][1] != color[0][2] && color[1][2] != color[0][0])
+ product1b = Q_INTERPOLATE(color[1][2], color[1][2], color[1][2], color[1][1]);
+ else if (color[1][1] == color[2][1] && color[1][1] == color[0][2] && color[0][1] != color[1][2] && color[1][1] != color[0][3])
+ product1b = Q_INTERPOLATE(color[1][2], color[1][1], color[1][1], color[1][1]);
+ else
+ product1b = INTERPOLATE(color[1][1], color[1][2]);
+ }
+
+ if (color[1][1] == color[2][2] && color[2][1] != color[1][2] && color[1][0] == color[1][1] && color[1][1] != color[3][2])
+ product2a = INTERPOLATE(color[2][1], color[1][1]);
+ else if (color[1][1] == color[2][0] && color[1][2] == color[1][1] && color[1][0] != color[2][1] && color[1][1] != color[3][0])
+ product2a = INTERPOLATE(color[2][1], color[1][1]);
+ else
+ product2a = color[2][1];
+
+ if (color[2][1] == color[1][2] && color[1][1] != color[2][2] && color[2][0] == color[2][1] && color[2][1] != color[0][2])
+ product1a = INTERPOLATE(color[2][1], color[1][1]);
+ else if (color[1][0] == color[2][1] && color[2][2] == color[2][1] && color[2][0] != color[1][1] && color[2][1] != color[0][0])
+ product1a = INTERPOLATE(color[2][1], color[1][1]);
+ else
+ product1a = color[1][1];
+
+ /* Set the calculated pixels */
+ switch (bpp) {
+ case 4:
+ AV_WN32A(dst_line[0] + x * 8, product1a);
+ AV_WN32A(dst_line[0] + x * 8 + 4, product1b);
+ AV_WN32A(dst_line[1] + x * 8, product2a);
+ AV_WN32A(dst_line[1] + x * 8 + 4, product2b);
+ break;
+ case 3:
+ AV_WL24(dst_line[0] + x * 6, product1a);
+ AV_WL24(dst_line[0] + x * 6 + 3, product1b);
+ AV_WL24(dst_line[1] + x * 6, product2a);
+ AV_WL24(dst_line[1] + x * 6 + 3, product2b);
+ break;
+ default: // bpp = 2
+ AV_WN32A(dst_line[0] + x * 4, product1a | (product1b << 16));
+ AV_WN32A(dst_line[1] + x * 4, product2a | (product2b << 16));
+ }
+
+ /* Move color matrix forward */
+ color[0][0] = color[0][1]; color[0][1] = color[0][2]; color[0][2] = color[0][3];
+ color[1][0] = color[1][1]; color[1][1] = color[1][2]; color[1][2] = color[1][3];
+ color[2][0] = color[2][1]; color[2][1] = color[2][2]; color[2][2] = color[2][3];
+ color[3][0] = color[3][1]; color[3][1] = color[3][2]; color[3][2] = color[3][3];
+
+ if (x < width - 3) {
+ x += 3;
+ switch (bpp) {
+ case 4:
+ READ_COLOR4(color[0][3], src_line[0], x);
+ READ_COLOR4(color[1][3], src_line[1], x);
+ READ_COLOR4(color[2][3], src_line[2], x);
+ READ_COLOR4(color[3][3], src_line[3], x);
+ break;
+ case 3:
+ READ_COLOR3(color[0][3], src_line[0], x);
+ READ_COLOR3(color[1][3], src_line[1], x);
+ READ_COLOR3(color[2][3], src_line[2], x);
+ READ_COLOR3(color[3][3], src_line[3], x);
+ break;
+ default: /* case 2 */
+ READ_COLOR2(color[0][3], src_line[0], x);
+ READ_COLOR2(color[1][3], src_line[1], x);
+ READ_COLOR2(color[2][3], src_line[2], x);
+ READ_COLOR2(color[3][3], src_line[3], x);
+ }
+ x -= 3;
+ }
+ }
+
+ /* We're done with one line, so we shift the source lines up */
+ src_line[0] = src_line[1];
+ src_line[1] = src_line[2];
+ src_line[2] = src_line[3];
+
+ /* Read next line */
+ src_line[3] = src_line[2];
+ if (y < height - 3)
+ src_line[3] += src_linesize;
+
+ switch (bpp) {
+ case 4:
+ READ_COLOR4(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR4(color[0][2], src_line[0], 1); READ_COLOR4(color[0][3], src_line[0], 2);
+ READ_COLOR4(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR4(color[1][2], src_line[1], 1); READ_COLOR4(color[1][3], src_line[1], 2);
+ READ_COLOR4(color[2][0], src_line[2], 0); color[2][1] = color[2][1]; READ_COLOR4(color[2][2], src_line[2], 1); READ_COLOR4(color[2][3], src_line[2], 2);
+ READ_COLOR4(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR4(color[3][2], src_line[3], 1); READ_COLOR4(color[3][3], src_line[3], 2);
+ break;
+ case 3:
+ READ_COLOR3(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR3(color[0][2], src_line[0], 1); READ_COLOR3(color[0][3], src_line[0], 2);
+ READ_COLOR3(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR3(color[1][2], src_line[1], 1); READ_COLOR3(color[1][3], src_line[1], 2);
+ READ_COLOR3(color[2][0], src_line[2], 0); color[2][1] = color[2][1]; READ_COLOR3(color[2][2], src_line[2], 1); READ_COLOR3(color[2][3], src_line[2], 2);
+ READ_COLOR3(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR3(color[3][2], src_line[3], 1); READ_COLOR3(color[3][3], src_line[3], 2);
+ break;
+ default:
+ READ_COLOR2(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR2(color[0][2], src_line[0], 1); READ_COLOR2(color[0][3], src_line[0], 2);
+ READ_COLOR2(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR2(color[1][2], src_line[1], 1); READ_COLOR2(color[1][3], src_line[1], 2);
+ READ_COLOR2(color[2][0], src_line[2], 0); color[2][1] = color[2][1]; READ_COLOR2(color[2][2], src_line[2], 1); READ_COLOR2(color[2][3], src_line[2], 2);
+ READ_COLOR2(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR2(color[3][2], src_line[3], 1); READ_COLOR2(color[3][3], src_line[3], 2);
+ }
+ } // y loop
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum PixelFormat pix_fmts[] = {
+ PIX_FMT_RGBA, PIX_FMT_BGRA, PIX_FMT_ARGB, PIX_FMT_ABGR,
+ PIX_FMT_RGB24, PIX_FMT_BGR24,
+ PIX_FMT_RGB565, PIX_FMT_BGR565, PIX_FMT_RGB555, PIX_FMT_BGR555,
+ PIX_FMT_NONE
+ };
+
+ avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
+ return 0;
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ Super2xSaIContext *sai = inlink->dst->priv;
+
+ sai->hi_pixel_mask = 0xFEFEFEFE;
+ sai->lo_pixel_mask = 0x01010101;
+ sai->q_hi_pixel_mask = 0xFCFCFCFC;
+ sai->q_lo_pixel_mask = 0x03030303;
+ sai->bpp = 4;
+
+ switch (inlink->format) {
+ case PIX_FMT_RGB24:
+ case PIX_FMT_BGR24:
+ sai->bpp = 3;
+ break;
+
+ case PIX_FMT_RGB565:
+ case PIX_FMT_BGR565:
+ sai->hi_pixel_mask = 0xF7DEF7DE;
+ sai->lo_pixel_mask = 0x08210821;
+ sai->q_hi_pixel_mask = 0xE79CE79C;
+ sai->q_lo_pixel_mask = 0x18631863;
+ sai->bpp = 2;
+ break;
+
+ case PIX_FMT_BGR555:
+ case PIX_FMT_RGB555:
+ sai->hi_pixel_mask = 0x7BDE7BDE;
+ sai->lo_pixel_mask = 0x04210421;
+ sai->q_hi_pixel_mask = 0x739C739C;
+ sai->q_lo_pixel_mask = 0x0C630C63;
+ sai->bpp = 2;
+ break;
+ }
+
+ return 0;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterLink *inlink = outlink->src->inputs[0];
+
+ outlink->w = inlink->w*2;
+ outlink->h = inlink->h*2;
+
+ av_log(inlink->dst, AV_LOG_INFO, "fmt:%s size:%dx%d -> size:%dx%d\n",
+ av_get_pix_fmt_name(inlink->format),
+ inlink->w, inlink->h, outlink->w, outlink->h);
+
+ return 0;
+}
+
+static void null_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) { }
+
+static void end_frame(AVFilterLink *inlink)
+{
+ AVFilterLink *outlink = inlink->dst->outputs[0];
+ AVFilterBufferRef *inpicref = inlink->cur_buf;
+ AVFilterBufferRef *outpicref = outlink->out_buf;
+
+ super2xsai(inlink->dst, inpicref->data[0], inpicref->linesize[0],
+ outpicref->data[0], outpicref->linesize[0],
+ inlink->w, inlink->h);
+
+ avfilter_unref_buffer(inpicref);
+ avfilter_draw_slice(outlink, 0, outlink->h, 1);
+ avfilter_end_frame(outlink);
+ avfilter_unref_buffer(outpicref);
+}
+
+AVFilter avfilter_vf_super2xsai = {
+ .name = "super2xsai",
+ .description = NULL_IF_CONFIG_SMALL("Scale the input by 2x using the Super2xSaI pixel art algorithm."),
+ .priv_size = sizeof(Super2xSaIContext),
+ .query_formats = query_formats,
+
+ .inputs = (const AVFilterPad[]) {
+ { .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ .draw_slice = null_draw_slice,
+ .end_frame = end_frame,
+ .min_perms = AV_PERM_READ },
+ { .name = NULL }
+ },
+ .outputs = (const AVFilterPad[]) {
+ { .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output },
+ { .name = NULL }
+ },
+};
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