@@ -85,6 +85,61 @@ SwsContext *sws_alloc_context(void);
*/
void sws_free_context(SwsContext **ctx);
+/***************************
+ * Supported frame formats *
+ ***************************/
+
+/**
+ * Test if a given pixel format is supported.
+ *
+ * @param output If 0, test if compatible with the source/input frame;
+ * otherwise, with the destination/output frame.
+ * @param format The format to check.
+ *
+ * @return A positive integer if supported, 0 otherwise.
+ */
+int sws_test_format(enum AVPixelFormat format, int output);
+
+/**
+ * Test if a given color space is supported.
+ *
+ * @param output If 0, test if compatible with the source/input frame;
+ * otherwise, with the destination/output frame.
+ * @param colorspace The colorspace to check.
+ *
+ * @return A positive integer if supported, 0 otherwise.
+ */
+int sws_test_colorspace(enum AVColorSpace colorspace, int output);
+
+/**
+ * Test if a given set of color primaries is supported.
+ *
+ * @param output If 0, test if compatible with the source/input frame;
+ * otherwise, with the destination/output frame.
+ * @param primaries The color primaries to check.
+ *
+ * @return A positive integer if supported, 0 otherwise.
+ */
+int sws_test_primaries(enum AVColorPrimaries primaries, int output);
+
+/**
+ * Test if a given color transfer function is supported.
+ *
+ * @param output If 0, test if compatible with the source/input frame;
+ * otherwise, with the destination/output frame.
+ * @param trc The color transfer function to check.
+ *
+ * @return A positive integer if supported, 0 otherwise.
+ */
+int sws_test_transfer(enum AVColorTransferCharacteristic trc, int output);
+
+/**
+ * Helper function to run all sws_test_* against a frame, as well as testing
+ * the basic frame properties for sanity. Ignores irrelevant properties - for
+ * example, AVColorSpace is not checked for RGB frames.
+ */
+int sws_test_frame(const AVFrame *frame, int output);
+
/* values for the flags, the stuff on the command line is different */
#define SWS_FAST_BILINEAR 1
#define SWS_BILINEAR 2
@@ -2711,3 +2711,71 @@ SwsFormat ff_fmt_from_frame(const AVFrame *frame, int field)
return fmt;
}
+
+int sws_test_format(enum AVPixelFormat format, int output)
+{
+ return output ? sws_isSupportedOutput(format) : sws_isSupportedInput(format);
+}
+
+int sws_test_colorspace(enum AVColorSpace csp, int output)
+{
+ switch (csp) {
+ case AVCOL_SPC_UNSPECIFIED:
+ case AVCOL_SPC_RGB:
+ case AVCOL_SPC_BT709:
+ case AVCOL_SPC_BT470BG:
+ case AVCOL_SPC_SMPTE170M:
+ case AVCOL_SPC_FCC:
+ case AVCOL_SPC_SMPTE240M:
+ case AVCOL_SPC_BT2020_NCL:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+int sws_test_primaries(enum AVColorPrimaries prim, int output)
+{
+ return prim > AVCOL_PRI_RESERVED0 && prim < AVCOL_PRI_NB &&
+ prim != AVCOL_PRI_RESERVED;
+}
+
+int sws_test_transfer(enum AVColorTransferCharacteristic trc, int output)
+{
+ return trc > AVCOL_TRC_RESERVED0 && trc < AVCOL_TRC_NB &&
+ trc != AVCOL_TRC_RESERVED;
+}
+
+static int test_range(enum AVColorRange range)
+{
+ return range >= 0 && range < AVCOL_RANGE_NB;
+}
+
+static int test_loc(enum AVChromaLocation loc)
+{
+ return loc >= 0 && loc < AVCHROMA_LOC_NB;
+}
+
+int ff_test_fmt(const SwsFormat *fmt, int output)
+{
+ return fmt->width > 0 && fmt->height > 0 &&
+ sws_test_format (fmt->format, output) &&
+ sws_test_colorspace(fmt->csp, output) &&
+ sws_test_primaries (fmt->prim, output) &&
+ sws_test_transfer (fmt->trc, output) &&
+ test_range (fmt->range) &&
+ test_loc (fmt->loc);
+}
+
+int sws_test_frame(const AVFrame *frame, int output)
+{
+ for (int field = 0; field < 2; field++) {
+ const SwsFormat fmt = ff_fmt_from_frame(frame, field);
+ if (!ff_test_fmt(&fmt, output))
+ return 0;
+ if (!fmt.interlaced)
+ break;
+ }
+
+ return 1;
+}
@@ -72,4 +72,6 @@ static inline int ff_fmt_align(enum AVPixelFormat fmt)
}
}
+int ff_test_fmt(const SwsFormat *fmt, int output);
+
#endif /* SWSCALE_UTILS_H */