sws: add a new scaling API

1 files changed, 21 insertions, 0 deletions

diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index 673407636a..55fa6cec07 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -27,6 +27,7 @@
 #include "libavutil/avassert.h"
 #include "libavutil/avutil.h"
 #include "libavutil/common.h"
+#include "libavutil/frame.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/log.h"
 #include "libavutil/mem_internal.h"
@@ -80,6 +81,19 @@ typedef enum SwsAlphaBlend {
     SWS_ALPHA_BLEND_NB,
 } SwsAlphaBlend;
 
+typedef struct Range {
+    unsigned int start;
+    unsigned int len;
+} Range;
+
+typedef struct RangeList {
+    Range          *ranges;
+    unsigned int nb_ranges;
+    int             ranges_allocated;
+} RangeList;
+
+int ff_range_add(RangeList *r, unsigned int start, unsigned int len);
+
 typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t *src[],
                        int srcStride[], int srcSliceY, int srcSliceH,
                        uint8_t *dst[], int dstStride[]);
@@ -313,6 +327,11 @@ typedef struct SwsContext {
     int sliceDir;                 ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
     double param[2];              ///< Input parameters for scaling algorithms that need them.
 
+    AVFrame *frame_src;
+    AVFrame *frame_dst;
+
+    RangeList src_ranges;
+
     /* The cascaded_* fields allow spliting a scaler task into multiple
      * sequential steps, this is for example used to limit the maximum
      * downscaling factor that needs to be supported in one scaler.
@@ -638,6 +657,8 @@ typedef struct SwsContext {
     // then passed as input to further conversion
     uint8_t     *xyz_scratch;
     unsigned int xyz_scratch_allocated;
+
+    unsigned int dst_slice_align;
 } SwsContext;
 //FIXME check init (where 0)