Implement sws_isSupportedInput() and sws_isSupportedOutput().

Originally committed as revision 30236 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

libswscale/swscale.c

@@ -157,6 +157,12 @@ const char *swscale_license(void)
         || (x)==PIX_FMT_YUV422P16BE   \
         || (x)==PIX_FMT_YUV444P16BE   \
     )
+
+int sws_isSupportedInput(enum PixelFormat pix_fmt)
+{
+    return isSupportedIn(pix_fmt);
+}
+
 #define isSupportedOut(x)   (       \
            (x)==PIX_FMT_YUV420P     \
         || (x)==PIX_FMT_YUVA420P    \
@@ -181,6 +187,12 @@ const char *swscale_license(void)
         || (x)==PIX_FMT_YUV422P16BE   \
         || (x)==PIX_FMT_YUV444P16BE   \
     )
+
+int sws_isSupportedOutput(enum PixelFormat pix_fmt)
+{
+    return isSupportedOut(pix_fmt);
+}
+
 #define isPacked(x)         (       \
            (x)==PIX_FMT_PAL8        \
         || (x)==PIX_FMT_YUYV422     \

libswscale/swscale.h

@@ -30,8 +30,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBSWSCALE_VERSION_MAJOR 0
-#define LIBSWSCALE_VERSION_MINOR 7
-#define LIBSWSCALE_VERSION_MICRO 2
+#define LIBSWSCALE_VERSION_MINOR 8
+#define LIBSWSCALE_VERSION_MICRO 0
 
 #define LIBSWSCALE_VERSION_INT  AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \
                                                LIBSWSCALE_VERSION_MINOR, \
@@ -122,6 +122,18 @@ typedef struct {
 
 struct SwsContext;
 
+/**
+ * Returns a positive value if pix_fmt is a supported input format, 0
+ * otherwise.
+ */
+int sws_isSupportedInput(enum PixelFormat pix_fmt);
+
+/**
+ * Returns a positive value if pix_fmt is a supported output format, 0
+ * otherwise.
+ */
+int sws_isSupportedOutput(enum PixelFormat pix_fmt);
+
 /**
  * Frees the swscaler context swsContext.
  * If swsContext is NULL, then does nothing.