1 files changed, 82 insertions, 0 deletions
diff --git a/video/sws_utils.h b/video/sws_utils.h
new file mode 100644
index 0000000..24bec07
--- /dev/null
+++ b/video/sws_utils.h
@@ -0,0 +1,82 @@
+#ifndef MPLAYER_SWS_UTILS_H
+#define MPLAYER_SWS_UTILS_H
+
+#include <stdbool.h>
+
+#include "mp_image.h"
+
+struct mp_image;
+struct mpv_global;
+
+// 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 MP_IMAGE_BYTE_ALIGN
+
+extern const int mp_sws_fast_flags;
+
+bool mp_sws_supported_format(int imgfmt);
+
+int mp_image_swscale(struct mp_image *dst, struct mp_image *src,
+                     int my_sws_flags);
+
+int mp_image_sw_blur_scale(struct mp_image *dst, struct mp_image *src,
+                           float gblur);
+
+enum mp_sws_scaler {
+    MP_SWS_AUTO = 0, // use command line
+    MP_SWS_SWS,
+    MP_SWS_ZIMG,
+};
+
+struct mp_sws_context {
+    // Can be set for verbose error printing.
+    struct mp_log *log;
+    // User configuration. These can be changed freely, at any time.
+    // mp_sws_scale() will handle the changes transparently.
+    int flags;
+    bool allow_zimg; // use zimg if available (ignores filters and all)
+    bool force_reload;
+    // These are also implicitly set by mp_sws_scale(), and thus optional.
+    // Setting them before that call makes sense when using mp_sws_reinit().
+    struct mp_image_params src, dst;
+
+    // This is unfortunately a hack: bypass command line choice
+    enum mp_sws_scaler force_scaler;
+
+    // If zimg is used. Need to manually invalidate cache (set force_reload).
+    // Conflicts with enabling command line opts.
+    struct zimg_opts *zimg_opts;
+
+    // Changing these requires setting force_reload=true.
+    // By default, they are NULL.
+    // Freeing the mp_sws_context will deallocate these if set.
+    struct SwsFilter *src_filter, *dst_filter;
+    double params[2];
+
+    // Cached context (if any)
+    struct SwsContext *sws;
+    bool supports_csp;
+
+    // Private.
+    struct m_config_cache *opts_cache;
+    struct mp_sws_context *cached; // contains parameters for which sws is valid
+    struct mp_zimg_context *zimg;
+    bool zimg_ok;
+    struct mp_image *aligned_src, *aligned_dst;
+};
+
+struct mp_sws_context *mp_sws_alloc(void *talloc_ctx);
+void mp_sws_enable_cmdline_opts(struct mp_sws_context *ctx, struct mpv_global *g);
+int mp_sws_reinit(struct mp_sws_context *ctx);
+int mp_sws_scale(struct mp_sws_context *ctx, struct mp_image *dst,
+                 struct mp_image *src);
+
+bool mp_sws_supports_formats(struct mp_sws_context *ctx,
+                             int imgfmt_out, int imgfmt_in);
+
+struct mp_image *mp_img_swap_to_native(struct mp_image *img);
+
+#endif /* MP_SWS_UTILS_H */
+
+// vim: ts=4 sw=4 et tw=80