Rewrite emu_edge functions to have separate src/dst_stride arguments.

This allows supporting files for which the image stride is smaller than
the max. block size + number of subpel mc taps, e.g. a 64x64 VP9 file
or a 16x16 VP8 file with -fflags +emu_edge.

1 files changed, 12 insertions, 8 deletions

diff --git a/libavcodec/videodsp.h b/libavcodec/videodsp.h
index e397720773..e85dff355c 100644
--- a/libavcodec/videodsp.h
+++ b/libavcodec/videodsp.h
@@ -30,9 +30,10 @@
 #include <stdint.h>
 
 #define EMULATED_EDGE(depth) \
-void ff_emulated_edge_mc_ ## depth (uint8_t *buf, const uint8_t *src, ptrdiff_t linesize,\
-                         int block_w, int block_h,\
-                         int src_x, int src_y, int w, int h);
+void ff_emulated_edge_mc_ ## depth(uint8_t *dst, ptrdiff_t dst_stride, \
+                                   const uint8_t *src, ptrdiff_t src_stride, \
+                                   int block_w, int block_h,\
+                                   int src_x, int src_y, int w, int h);
 
 EMULATED_EDGE(8)
 EMULATED_EDGE(16)
@@ -42,10 +43,12 @@ typedef struct VideoDSPContext {
      * Copy a rectangular area of samples to a temporary buffer and replicate
      * the border samples.
      *
-     * @param buf destination buffer
+     * @param dst destination buffer
+     * @param dst_stride number of bytes between 2 vertically adjacent samples
+     *                   in destination buffer
      * @param src source buffer
-     * @param linesize number of bytes between 2 vertically adjacent samples
-     *                 in both the source and destination buffers
+     * @param src_stride number of bytes between 2 vertically adjacent samples
+     *                   in source buffer
      * @param block_w width of block
      * @param block_h height of block
      * @param src_x x coordinate of the top left sample of the block in the
@@ -55,8 +58,9 @@ typedef struct VideoDSPContext {
      * @param w width of the source buffer
      * @param h height of the source buffer
      */
-    void (*emulated_edge_mc)(uint8_t *buf, const uint8_t *src,
-                             ptrdiff_t linesize, int block_w, int block_h,
+    void (*emulated_edge_mc)(uint8_t *dst, ptrdiff_t dst_stride,
+                             const uint8_t *src, ptrdiff_t src_stride,
+                             int block_w, int block_h,
                              int src_x, int src_y, int w, int h);
 
     /**