[FFmpeg-soc] [soc]: r1036 - in libavfilter: Makefile allfilters.h avfilter.c vf_negate.c

[koorogi]

Author: koorogi
Date: Mon Aug 20 07:27:17 2007
New Revision: 1036

Log:
Image negating filter


Added:
   libavfilter/vf_negate.c
Modified:
   libavfilter/Makefile
   libavfilter/allfilters.h
   libavfilter/avfilter.c

Modified: libavfilter/Makefile
==============================================================================
--- libavfilter/Makefile	(original)
+++ libavfilter/Makefile	Mon Aug 20 07:27:17 2007
@@ -13,6 +13,7 @@ OBJS-yes = vsrc_dummy.o \
            vf_crop.o \
            vf_fifo.o \
            vf_fps.o \
+           vf_negate.o \
            vf_overlay.o \
            vf_passthrough.o \
            vf_rgb2bgr.o \

Modified: libavfilter/allfilters.h
==============================================================================
--- libavfilter/allfilters.h	(original)
+++ libavfilter/allfilters.h	Mon Aug 20 07:27:17 2007
@@ -29,6 +29,7 @@ extern AVFilter avfilter_vf_fps;
 extern AVFilter avfilter_vf_graph;
 extern AVFilter avfilter_vf_graphdesc;
 extern AVFilter avfilter_vf_graphfile;
+extern AVFilter avfilter_vf_negate;
 extern AVFilter avfilter_vf_overlay;
 extern AVFilter avfilter_vf_passthrough;
 extern AVFilter avfilter_vf_rgb2bgr;

Modified: libavfilter/avfilter.c
==============================================================================
--- libavfilter/avfilter.c	(original)
+++ libavfilter/avfilter.c	Mon Aug 20 07:27:17 2007
@@ -329,6 +329,7 @@ void avfilter_init(void)
     avfilter_register(&avfilter_vf_graph);
     avfilter_register(&avfilter_vf_graphdesc);
     avfilter_register(&avfilter_vf_graphfile);
+    avfilter_register(&avfilter_vf_negate);
     avfilter_register(&avfilter_vf_overlay);
     avfilter_register(&avfilter_vf_passthrough);
     avfilter_register(&avfilter_vf_rgb2bgr);

Added: libavfilter/vf_negate.c
==============================================================================
--- (empty file)
+++ libavfilter/vf_negate.c	Mon Aug 20 07:27:17 2007
@@ -0,0 +1,111 @@
+/*
+ * Video negative filter
+ * copyright (c) 2007 Bobby Bingham
+ *
+ * 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 "avfilter.h"
+
+typedef struct
+{
+    int offY, offUV;
+    int hsub, vsub;
+} NegContext;
+
+static int *query_formats(AVFilterLink *link)
+{
+    return avfilter_make_format_list(10,
+                PIX_FMT_YUV444P,  PIX_FMT_YUV422P,  PIX_FMT_YUV420P,
+                PIX_FMT_YUV411P,  PIX_FMT_YUV410P,
+                PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ420P,
+                PIX_FMT_YUV440P,  PIX_FMT_YUVJ440P);
+}
+
+static int config_props(AVFilterLink *link)
+{
+    NegContext *neg = link->dst->priv;
+
+    avcodec_get_chroma_sub_sample(link->format, &neg->hsub, &neg->vsub);
+
+    switch(link->format) {
+    case PIX_FMT_YUVJ444P:
+    case PIX_FMT_YUVJ422P:
+    case PIX_FMT_YUVJ420P:
+    case PIX_FMT_YUVJ440P:
+        neg->offY  =
+        neg->offUV = 0;
+        break;
+    default:
+        neg->offY  = -4;
+        neg->offUV = 1;
+    }
+
+    return 0;
+}
+
+static void draw_slice(AVFilterLink *link, int y, int h)
+{
+    NegContext *neg = link->dst->priv;
+    AVFilterPicRef *in  = link->cur_pic;
+    AVFilterPicRef *out = link->dst->outputs[0]->outpic;
+    uint8_t *inrow, *outrow;
+    int i, j, plane;
+
+    /* luma plane */
+    inrow  = in-> data[0] + y * in-> linesize[0];
+    outrow = out->data[0] + y * out->linesize[0];
+    for(i = 0; i < h; i ++) {
+        for(j = 0; j < link->w; j ++)
+            outrow[j] = 255 - inrow[j] + neg->offY;
+        inrow  += in-> linesize[0];
+        outrow += out->linesize[0];
+    }
+
+    /* chroma planes */
+    for(plane = 1; plane < 3; plane ++) {
+        inrow  = in-> data[plane] + (y >> neg->vsub) * in-> linesize[plane];
+        outrow = out->data[plane] + (y >> neg->vsub) * out->linesize[plane];
+
+        for(i = 0; i < h >> neg->vsub; i ++) {
+            for(j = 0; j < link->w >> neg->hsub; j ++)
+                outrow[j] = 255 - inrow[j] + neg->offUV;
+            inrow  += in-> linesize[plane];
+            outrow += out->linesize[plane];
+        }
+    }
+}
+
+AVFilter avfilter_vf_negate =
+{
+    .name      = "negate",
+    .author    = "Bobby Bingham",
+
+    .priv_size = sizeof(NegContext),
+
+    .inputs    = (AVFilterPad[]) {{ .name            = "default",
+                                    .type            = AV_PAD_VIDEO,
+                                    .draw_slice      = draw_slice,
+                                    .query_formats   = query_formats,
+                                    .config_props    = config_props,
+                                    .min_perms       = AV_PERM_READ, },
+                                  { .name = NULL}},
+    .outputs   = (AVFilterPad[]) {{ .name            = "default",
+                                    .type            = AV_PAD_VIDEO, },
+                                  { .name = NULL}},
+};
+