vf_scale: factor out libswscale equalizer control

Will be used by vo_x11.

3 files changed, 34 insertions, 23 deletions

diff --git a/video/filter/vf_scale.c b/video/filter/vf_scale.c
index 618460965a..3184194a33 100644
--- a/video/filter/vf_scale.c
+++ b/video/filter/vf_scale.c
@@ -353,37 +353,16 @@ static struct mp_image *filter(struct vf_instance *vf, struct mp_image *mpi)
 
 static int control(struct vf_instance *vf, int request, void *data)
 {
-    int r;
-    vf_equalizer_t *eq;
     struct mp_sws_context *sws = vf->priv->sws;
 
     switch (request) {
     case VFCTRL_GET_EQUALIZER:
-        eq = data;
-        if (!strcmp(eq->item, "brightness"))
-            eq->value =  ((sws->brightness * 100) + (1 << 15)) >> 16;
-        else if (!strcmp(eq->item, "contrast"))
-            eq->value = (((sws->contrast  * 100) + (1 << 15)) >> 16) - 100;
-        else if (!strcmp(eq->item, "saturation"))
-            eq->value = (((sws->saturation * 100) + (1 << 15)) >> 16) - 100;
-        else
+        if (mp_sws_get_vf_equalizer(sws, data) < 1)
             break;
         return CONTROL_TRUE;
     case VFCTRL_SET_EQUALIZER:
-        eq = data;
-        if (!strcmp(eq->item, "brightness"))
-            sws->brightness = ((eq->value << 16) + 50) / 100;
-        else if (!strcmp(eq->item, "contrast"))
-            sws->contrast   = (((eq->value + 100) << 16) + 50) / 100;
-        else if (!strcmp(eq->item, "saturation"))
-            sws->saturation = (((eq->value + 100) << 16) + 50) / 100;
-        else
+        if (mp_sws_get_vf_equalizer(sws, data) < 1)
             break;
-
-        r = mp_sws_reinit(sws);
-        if (r < 0)
-            break;
-
         return CONTROL_TRUE;
     default:
         break;
diff --git a/video/sws_utils.c b/video/sws_utils.c
index 7adecc49fc..bc9c408b3e 100644
--- a/video/sws_utils.c
+++ b/video/sws_utils.c
@@ -29,6 +29,7 @@
 #include "fmt-conversion.h"
 #include "csputils.h"
 #include "mpvcore/mp_msg.h"
+#include "video/filter/vf.h"
 
 //global sws_flags from the command line
 int sws_flags = 2;
@@ -309,4 +310,31 @@ void mp_image_sw_blur_scale(struct mp_image *dst, struct mp_image *src,
     talloc_free(ctx);
 }
 
+int mp_sws_get_vf_equalizer(struct mp_sws_context *sws, struct vf_seteq *eq)
+{
+    if (!strcmp(eq->item, "brightness"))
+        eq->value =  ((sws->brightness * 100) + (1 << 15)) >> 16;
+    else if (!strcmp(eq->item, "contrast"))
+        eq->value = (((sws->contrast  * 100) + (1 << 15)) >> 16) - 100;
+    else if (!strcmp(eq->item, "saturation"))
+        eq->value = (((sws->saturation * 100) + (1 << 15)) >> 16) - 100;
+    else
+        return 0;
+    return 1;
+}
+
+int mp_sws_set_vf_equalizer(struct mp_sws_context *sws, struct vf_seteq *eq)
+{
+    if (!strcmp(eq->item, "brightness"))
+        sws->brightness = ((eq->value << 16) + 50) / 100;
+    else if (!strcmp(eq->item, "contrast"))
+        sws->contrast   = (((eq->value + 100) << 16) + 50) / 100;
+    else if (!strcmp(eq->item, "saturation"))
+        sws->saturation = (((eq->value + 100) << 16) + 50) / 100;
+    else
+        return 0;
+
+    return mp_sws_reinit(sws) >= 0 ? 1 : -1;
+}
+
 // vim: ts=4 sw=4 et tw=80
diff --git a/video/sws_utils.h b/video/sws_utils.h
index 647cae2281..6183d5e88e 100644
--- a/video/sws_utils.h
+++ b/video/sws_utils.h
@@ -53,6 +53,10 @@ void mp_sws_set_from_cmdline(struct mp_sws_context *ctx);
 int mp_sws_scale(struct mp_sws_context *ctx, struct mp_image *dst,
                  struct mp_image *src);
 
+struct vf_seteq;
+int mp_sws_set_vf_equalizer(struct mp_sws_context *sws, struct vf_seteq *eq);
+int mp_sws_get_vf_equalizer(struct mp_sws_context *sws, struct vf_seteq *eq);
+
 #endif /* MP_SWS_UTILS_H */
 
 // vim: ts=4 sw=4 et tw=80