avfilter/vf_unsharp: enable slice threading

benchmarking with a simple command:
ffmpeg -i 1080p.mp4 -vf unsharp=la=3:ca=3 -an -f null /dev/null
with the patch, the fps increase from 50 to 120 on my local machine (i7-6770HQ).

Signed-off-by: Ruiling Song <ruiling.song@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/libavfilter/unsharp.h b/libavfilter/unsharp.h
index caff986fc1..a60b30f31a 100644
--- a/libavfilter/unsharp.h
+++ b/libavfilter/unsharp.h
@@ -37,7 +37,8 @@ typedef struct UnsharpFilterParam {
     int steps_y;                             ///< vertical step count
     int scalebits;                           ///< bits to shift pixel
     int32_t halfscale;                       ///< amount to add to pixel
-    uint32_t *sc[MAX_MATRIX_SIZE - 1];       ///< finite state machine storage
+    uint32_t *sr;        ///< finite state machine storage within a row
+    uint32_t **sc;       ///< finite state machine storage across rows
 } UnsharpFilterParam;
 
 typedef struct UnsharpContext {
@@ -47,6 +48,7 @@ typedef struct UnsharpContext {
     UnsharpFilterParam luma;   ///< luma parameters (width, height, amount)
     UnsharpFilterParam chroma; ///< chroma parameters (width, height, amount)
     int hsub, vsub;
+    int nb_threads;
     int opencl;
     int (* apply_unsharp)(AVFilterContext *ctx, AVFrame *in, AVFrame *out);
 } UnsharpContext;