avfilter: Constify all AVFilters

[ffmpeg] / libavfilter / vf_colorkey.c

diff --git a/libavfilter/vf_colorkey.c b/libavfilter/vf_colorkey.c
index 3d65e59d42c6fa480e00f4b7ab079677bcac876a..e0b43728426b8e13fa5ff32166fba2700390ebdd 100644 (file)
--- a/libavfilter/vf_colorkey.c
+++ b/libavfilter/vf_colorkey.c
@@ -34,6 +34,9 @@ typedef struct ColorkeyContext {
     uint8_t colorkey_rgba[4];
     float similarity;
     float blend;
+
+    int (*do_slice)(AVFilterContext *ctx, void *arg,
+                    int jobnr, int nb_jobs);
 } ColorkeyContext;
 
 static uint8_t do_colorkey_pixel(ColorkeyContext *ctx, uint8_t r, uint8_t g, uint8_t b)
@@ -42,7 +45,7 @@ static uint8_t do_colorkey_pixel(ColorkeyContext *ctx, uint8_t r, uint8_t g, uin
     int dg = (int)g - ctx->colorkey_rgba[1];
     int db = (int)b - ctx->colorkey_rgba[2];
 
-    double diff = sqrt((dr * dr + dg * dg + db * db) / (255.0 * 255.0));
+    double diff = sqrt((dr * dr + dg * dg + db * db) / (255.0 * 255.0 * 3.0));
 
     if (ctx->blend > 0.0001) {
         return av_clipd((diff - ctx->similarity) / ctx->blend, 0.0, 1.0) * 255.0;
@@ -77,15 +80,65 @@ static int do_colorkey_slice(AVFilterContext *avctx, void *arg, int jobnr, int n
     return 0;
 }
 
+static int do_colorhold_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
+{
+    AVFrame *frame = arg;
+
+    const int slice_start = (frame->height * jobnr) / nb_jobs;
+    const int slice_end = (frame->height * (jobnr + 1)) / nb_jobs;
+
+    ColorkeyContext *ctx = avctx->priv;
+
+    int x, y;
+
+    for (y = slice_start; y < slice_end; ++y) {
+        for (x = 0; x < frame->width; ++x) {
+            int o, t, r, g, b;
+
+            o = frame->linesize[0] * y + x * 4;
+            r = frame->data[0][o + ctx->co[0]];
+            g = frame->data[0][o + ctx->co[1]];
+            b = frame->data[0][o + ctx->co[2]];
+
+            t = do_colorkey_pixel(ctx, r, g, b);
+
+            if (t > 0) {
+                int a = (r + g + b) / 3;
+                int rt = 255 - t;
+
+                frame->data[0][o + ctx->co[0]] = (a * t + r * rt + 127) >> 8;
+                frame->data[0][o + ctx->co[1]] = (a * t + g * rt + 127) >> 8;
+                frame->data[0][o + ctx->co[2]] = (a * t + b * rt + 127) >> 8;
+            }
+        }
+    }
+
+    return 0;
+}
+
+static av_cold int init_filter(AVFilterContext *avctx)
+{
+    ColorkeyContext *ctx = avctx->priv;
+
+    if (!strcmp(avctx->filter->name, "colorkey")) {
+        ctx->do_slice = do_colorkey_slice;
+    } else {
+        ctx->do_slice = do_colorhold_slice;
+    }
+
+    return 0;
+}
+
 static int filter_frame(AVFilterLink *link, AVFrame *frame)
 {
     AVFilterContext *avctx = link->dst;
+    ColorkeyContext *ctx = avctx->priv;
     int res;
 
     if (res = av_frame_make_writable(frame))
         return res;
 
-    if (res = avctx->internal->execute(avctx, do_colorkey_slice, frame, NULL, FFMIN(frame->height, ff_filter_get_nb_threads(avctx))))
+    if (res = avctx->internal->execute(avctx, ctx->do_slice, frame, NULL, FFMIN(frame->height, ff_filter_get_nb_threads(avctx))))
         return res;
 
     return ff_filter_frame(avctx->outputs[0], frame);
@@ -146,10 +199,12 @@ static const AVFilterPad colorkey_outputs[] = {
 };
 
 #define OFFSET(x) offsetof(ColorkeyContext, x)
-#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
+
+#if CONFIG_COLORKEY_FILTER
 
 static const AVOption colorkey_options[] = {
-    { "color", "set the colorkey key color", OFFSET(colorkey_rgba), AV_OPT_TYPE_COLOR, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS },
+    { "color", "set the colorkey key color", OFFSET(colorkey_rgba), AV_OPT_TYPE_COLOR, { .str = "black" }, 0, 0, FLAGS },
     { "similarity", "set the colorkey similarity value", OFFSET(similarity), AV_OPT_TYPE_FLOAT, { .dbl = 0.01 }, 0.01, 1.0, FLAGS },
     { "blend", "set the colorkey key blend value", OFFSET(blend), AV_OPT_TYPE_FLOAT, { .dbl = 0.0 }, 0.0, 1.0, FLAGS },
     { NULL }
@@ -157,13 +212,42 @@ static const AVOption colorkey_options[] = {
 
 AVFILTER_DEFINE_CLASS(colorkey);
 
-AVFilter ff_vf_colorkey = {
+const AVFilter ff_vf_colorkey = {
     .name          = "colorkey",
     .description   = NULL_IF_CONFIG_SMALL("Turns a certain color into transparency. Operates on RGB colors."),
     .priv_size     = sizeof(ColorkeyContext),
     .priv_class    = &colorkey_class,
     .query_formats = query_formats,
+    .init          = init_filter,
     .inputs        = colorkey_inputs,
     .outputs       = colorkey_outputs,
     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
+    .process_command = ff_filter_process_command,
 };
+
+#endif /* CONFIG_COLORKEY_FILTER */
+#if CONFIG_COLORHOLD_FILTER
+
+static const AVOption colorhold_options[] = {
+    { "color", "set the colorhold key color", OFFSET(colorkey_rgba), AV_OPT_TYPE_COLOR, { .str = "black" }, 0, 0, FLAGS },
+    { "similarity", "set the colorhold similarity value", OFFSET(similarity), AV_OPT_TYPE_FLOAT, { .dbl = 0.01 }, 0.01, 1.0, FLAGS },
+    { "blend", "set the colorhold blend value", OFFSET(blend), AV_OPT_TYPE_FLOAT, { .dbl = 0.0 }, 0.0, 1.0, FLAGS },
+    { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(colorhold);
+
+const AVFilter ff_vf_colorhold = {
+    .name          = "colorhold",
+    .description   = NULL_IF_CONFIG_SMALL("Turns a certain color range into gray. Operates on RGB colors."),
+    .priv_size     = sizeof(ColorkeyContext),
+    .priv_class    = &colorhold_class,
+    .query_formats = query_formats,
+    .init          = init_filter,
+    .inputs        = colorkey_inputs,
+    .outputs       = colorkey_outputs,
+    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
+    .process_command = ff_filter_process_command,
+};
+
+#endif /* CONFIG_COLORHOLD_FILTER */