avfilter: add chromashift filter

3 files changed, 261 insertions, 0 deletions

diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 6058fb97bc..8f3fde8c27 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -169,6 +169,7 @@ OBJS-$(CONFIG_BOXBLUR_OPENCL_FILTER)         += vf_avgblur_opencl.o opencl.o \
 OBJS-$(CONFIG_BWDIF_FILTER)                  += vf_bwdif.o
 OBJS-$(CONFIG_CHROMAHOLD_FILTER)             += vf_chromakey.o
 OBJS-$(CONFIG_CHROMAKEY_FILTER)              += vf_chromakey.o
+OBJS-$(CONFIG_CHROMASHIFT_FILTER)            += vf_chromashift.o
 OBJS-$(CONFIG_CIESCOPE_FILTER)               += vf_ciescope.o
 OBJS-$(CONFIG_CODECVIEW_FILTER)              += vf_codecview.o
 OBJS-$(CONFIG_COLORBALANCE_FILTER)           += vf_colorbalance.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 8dfa572fde..6f392b5632 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -158,6 +158,7 @@ extern AVFilter ff_vf_boxblur_opencl;
 extern AVFilter ff_vf_bwdif;
 extern AVFilter ff_vf_chromahold;
 extern AVFilter ff_vf_chromakey;
+extern AVFilter ff_vf_chromashift;
 extern AVFilter ff_vf_ciescope;
 extern AVFilter ff_vf_codecview;
 extern AVFilter ff_vf_colorbalance;
diff --git a/libavfilter/vf_chromashift.c b/libavfilter/vf_chromashift.c
new file mode 100644
index 0000000000..fe1c79e5a7
--- /dev/null
+++ b/libavfilter/vf_chromashift.c
@@ -0,0 +1,259 @@
+/*
+ * Copyright (c) 2018 Paul B Mahol
+ *
+ * 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
+ */
+
+#include "libavutil/avstring.h"
+#include "libavutil/eval.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "framesync.h"
+#include "video.h"
+
+typedef struct ChromaShiftContext {
+    const AVClass *class;
+    int cbh, cbv;
+    int crh, crv;
+    int edge;
+
+    int depth;
+    int height[4];
+    int width[4];
+    int linesize[4];
+
+    AVFrame *in;
+
+    int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
+} ChromaShiftContext;
+
+static int query_formats(AVFilterContext *ctx)
+{
+    static const enum AVPixelFormat pix_fmts[] = {
+        AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
+        AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
+        AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
+        AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
+        AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10,
+        AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
+        AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
+        AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
+        AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
+        AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
+        AV_PIX_FMT_NONE
+    };
+
+    AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
+    if (!fmts_list)
+        return AVERROR(ENOMEM);
+    return ff_set_common_formats(ctx, fmts_list);
+}
+
+#define DEFINE_SMEAR(depth, type, div)                                                    \
+static int smear_slice ## depth(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)  \
+{                                                                                         \
+    ChromaShiftContext *s = ctx->priv;                                                    \
+    AVFrame *in = s->in;                                                                  \
+    AVFrame *out = arg;                                                                   \
+    const int sulinesize = in->linesize[1] / div;                                         \
+    const int svlinesize = in->linesize[2] / div;                                         \
+    const int ulinesize = out->linesize[1] / div;                                         \
+    const int vlinesize = out->linesize[2] / div;                                         \
+    const int cbh = s->cbh;                                                               \
+    const int cbv = s->cbv;                                                               \
+    const int crh = s->crh;                                                               \
+    const int crv = s->crv;                                                               \
+    const int h = s->height[1];                                                           \
+    const int w = s->width[1];                                                            \
+    const int slice_start = (h * jobnr) / nb_jobs;                                        \
+    const int slice_end = (h * (jobnr+1)) / nb_jobs;                                      \
+    const type *su = (const type *)in->data[1];                                           \
+    const type *sv = (const type *)in->data[2];                                           \
+    type *du = (type *)out->data[1] + slice_start * ulinesize;                            \
+    type *dv = (type *)out->data[2] + slice_start * vlinesize;                            \
+                                                                                          \
+    for (int y = slice_start; y < slice_end; y++) {                                       \
+        const int duy = av_clip(y - cbv, 0, h-1) * sulinesize;                            \
+        const int dvy = av_clip(y - crv, 0, h-1) * svlinesize;                            \
+                                                                                          \
+        for (int x = 0; x < w; x++) {                                                     \
+            du[x] = su[av_clip(x - cbh, 0, w - 1) + duy];                                 \
+            dv[x] = sv[av_clip(x - crh, 0, w - 1) + dvy];                                 \
+        }                                                                                 \
+                                                                                          \
+        du += ulinesize;                                                                  \
+        dv += vlinesize;                                                                  \
+    }                                                                                     \
+                                                                                          \
+    return 0;                                                                             \
+}
+
+DEFINE_SMEAR(8, uint8_t, 1)
+DEFINE_SMEAR(16, uint16_t, 2)
+
+#define DEFINE_WRAP(depth, type, div)                                                     \
+static int wrap_slice ## depth(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)   \
+{                                                                                         \
+    ChromaShiftContext *s = ctx->priv;                                                    \
+    AVFrame *in = s->in;                                                                  \
+    AVFrame *out = arg;                                                                   \
+    const int sulinesize = in->linesize[1] / div;                                         \
+    const int svlinesize = in->linesize[2] / div;                                         \
+    const int ulinesize = out->linesize[1] / div;                                         \
+    const int vlinesize = out->linesize[2] / div;                                         \
+    const int cbh = s->cbh;                                                               \
+    const int cbv = s->cbv;                                                               \
+    const int crh = s->crh;                                                               \
+    const int crv = s->crv;                                                               \
+    const int h = s->height[1];                                                           \
+    const int w = s->width[1];                                                            \
+    const int slice_start = (h * jobnr) / nb_jobs;                                        \
+    const int slice_end = (h * (jobnr+1)) / nb_jobs;                                      \
+    const type *su = (const type *)in->data[1];                                           \
+    const type *sv = (const type *)in->data[2];                                           \
+    type *du = (type *)out->data[1] + slice_start * ulinesize;                            \
+    type *dv = (type *)out->data[2] + slice_start * vlinesize;                            \
+                                                                                          \
+    for (int y = slice_start; y < slice_end; y++) {                                       \
+        int uy = (y - cbv) % h;                                                           \
+        int vy = (y - crv) % h;                                                           \
+                                                                                          \
+        if (uy < 0)                                                                       \
+            uy += h;                                                                      \
+        if (vy < 0)                                                                       \
+            vy += h;                                                                      \
+                                                                                          \
+        for (int x = 0; x < w; x++) {                                                     \
+            int ux = (x - cbh) % w;                                                       \
+            int vx = (x - crh) % w;                                                       \
+                                                                                          \
+            if (ux < 0)                                                                   \
+                ux += w;                                                                  \
+            if (vx < 0)                                                                   \
+                vx += w;                                                                  \
+                                                                                          \
+            du[x] = su[ux + uy * sulinesize];                                             \
+            dv[x] = sv[vx + vy * svlinesize];                                             \
+        }                                                                                 \
+                                                                                          \
+        du += ulinesize;                                                                  \
+        dv += vlinesize;                                                                  \
+    }                                                                                     \
+                                                                                          \
+    return 0;                                                                             \
+}
+
+DEFINE_WRAP(8, uint8_t, 1)
+DEFINE_WRAP(16, uint16_t, 2)
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+    AVFilterContext *ctx = inlink->dst;
+    AVFilterLink *outlink = ctx->outputs[0];
+    ChromaShiftContext *s = ctx->priv;
+    AVFrame *out;
+
+    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);
+
+    s->in = in;
+    av_image_copy_plane(out->data[0] + out->linesize[0],
+                        out->linesize[0],
+                        in->data[0], in->linesize[0],
+                        s->linesize[0], s->height[0]);
+    ctx->internal->execute(ctx, s->filter_slice, out, NULL,
+                           FFMIN3(s->height[1],
+                                  s->height[2],
+                                  ff_filter_get_nb_threads(ctx)));
+    s->in = NULL;
+    av_frame_free(&in);
+    return ff_filter_frame(outlink, out);
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+    AVFilterContext *ctx = inlink->dst;
+    ChromaShiftContext *s = ctx->priv;
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+
+    s->depth = desc->comp[0].depth;
+    if (s->edge)
+        s->filter_slice = s->depth > 8 ? wrap_slice16 : wrap_slice8;
+    else
+        s->filter_slice = s->depth > 8 ? smear_slice16 : smear_slice8;
+    s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+    s->height[0] = s->height[3] = inlink->h;
+    s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
+    s->width[0] = s->width[3] = inlink->w;
+
+    return av_image_fill_linesizes(s->linesize, inlink->format, inlink->w);
+}
+
+#define OFFSET(x) offsetof(ChromaShiftContext, x)
+#define VF AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption chromashift_options[] = {
+    { "cbh", "shift chroma-blue horizontally", OFFSET(cbh),  AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
+    { "cbv", "shift chroma-blue vertically",   OFFSET(cbv),  AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
+    { "crh", "shift chroma-red horizontally",  OFFSET(crh),  AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
+    { "crv", "shift chroma-red vertically",    OFFSET(crv),  AV_OPT_TYPE_INT,   {.i64=0}, -255, 255, .flags = VF },
+    { "edge", "set edge operation",            OFFSET(edge), AV_OPT_TYPE_INT,   {.i64=0},    0,   1, .flags = VF, "edge" },
+    { "smear",                              0,            0, AV_OPT_TYPE_CONST, {.i64=0},    0,   0, .flags = VF, "edge" },
+    { "wrap",                               0,            0, AV_OPT_TYPE_CONST, {.i64=1},    0,   0, .flags = VF, "edge" },
+    { NULL },
+};
+
+static const AVFilterPad inputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .filter_frame = filter_frame,
+        .config_props = config_input,
+    },
+    { NULL }
+};
+
+static const AVFilterPad outputs[] = {
+    {
+        .name = "default",
+        .type = AVMEDIA_TYPE_VIDEO,
+    },
+    { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(chromashift);
+
+AVFilter ff_vf_chromashift = {
+    .name          = "chromashift",
+    .description   = NULL_IF_CONFIG_SMALL("Shift chroma."),
+    .priv_size     = sizeof(ChromaShiftContext),
+    .priv_class    = &chromashift_class,
+    .query_formats = query_formats,
+    .outputs       = outputs,
+    .inputs        = inputs,
+    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
+};