libmpcodecs: move vf_scale.c swscale helper functions to sws_utils.c

Extracted/rebased by wm4 from commits 93978f17b76d..13211ef5fc20.
Actual mp_image_swscale is added in a later commit.

1 files changed, 27 insertions, 0 deletions

diff --git a/libmpcodecs/sws_utils.h b/libmpcodecs/sws_utils.h
new file mode 100644
index 0000000000..a8dc970d08
--- /dev/null
+++ b/libmpcodecs/sws_utils.h
@@ -0,0 +1,27 @@
+#ifndef MPLAYER_SWS_UTILS_H
+#define MPLAYER_SWS_UTILS_H
+
+#include <libswscale/swscale.h>
+
+struct mp_image;
+struct mp_csp_details;
+
+// libswscale currently requires 16 bytes alignment for row pointers and
+// strides. Otherwise, it will print warnings and use slow codepaths.
+// Guaranteed to be a power of 2 and > 1.
+#define SWS_MIN_BYTE_ALIGN 16
+
+void sws_getFlagsAndFilterFromCmdLine(int *flags, SwsFilter **srcFilterParam,
+                                      SwsFilter **dstFilterParam);
+struct SwsContext *sws_getContextFromCmdLine(int srcW, int srcH, int srcFormat,
+                                             int dstW, int dstH,
+                                             int dstFormat);
+struct SwsContext *sws_getContextFromCmdLine_hq(int srcW, int srcH,
+                                                int srcFormat, int dstW,
+                                                int dstH,
+                                                int dstFormat);
+int mp_sws_set_colorspace(struct SwsContext *sws, struct mp_csp_details *csp);
+
+#endif /* MP_SWS_UTILS_H */
+
+// vim: ts=4 sw=4 et tw=80