[FFmpeg-cvslog] avcodec/vvcdec: refact out is_available from is_a0_available

[Nuo Mi]

ffmpeg | branch: master | Nuo Mi <nuomi2021 at gmail.com> | Sun Jan 14 11:58:37 2024 +0800| [93b0d5f9ce906b622431a4c4a17f8e1695306e52] | committer: Nuo Mi

avcodec/vvcdec: refact out is_available from is_a0_available

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=93b0d5f9ce906b622431a4c4a17f8e1695306e52
---

 libavcodec/vvc/mvs.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/libavcodec/vvc/mvs.c b/libavcodec/vvc/mvs.c
index 1788a7150b..905edf1cd0 100644
--- a/libavcodec/vvc/mvs.c
+++ b/libavcodec/vvc/mvs.c
@@ -545,6 +545,16 @@ typedef struct NeighbourContext {
     const VVCLocalContext *lc;
 } NeighbourContext;
 
+static int is_available(const VVCFrameContext *fc, const int x0, const int y0)
+{
+    const VVCSPS *sps      = fc->ps.sps;
+    const int x            = x0 >> sps->min_cb_log2_size_y;
+    const int y            = y0 >> sps->min_cb_log2_size_y;
+    const int min_cb_width = fc->ps.pps->min_cb_width;
+
+    return SAMPLE_CTB(fc->tab.cb_width[0], x, y) != 0;
+}
+
 static int is_a0_available(const VVCLocalContext *lc, const CodingUnit *cu)
 {
     const VVCFrameContext *fc   = lc->fc;
@@ -555,15 +565,11 @@ static int is_a0_available(const VVCLocalContext *lc, const CodingUnit *cu)
     if (!x0b && !lc->ctb_left_flag) {
         cand_bottom_left = 0;
     } else {
-        const int log2_min_cb_size  = sps->min_cb_log2_size_y;
-        const int min_cb_width      = fc->ps.pps->min_cb_width;
-        const int x                 = (cu->x0 - 1) >> log2_min_cb_size;
-        const int y                 = (cu->y0 + cu->cb_height) >> log2_min_cb_size;
-        const int max_y             = FFMIN(fc->ps.pps->height, ((cu->y0 >> sps->ctb_log2_size_y) + 1) << sps->ctb_log2_size_y);
+        const int max_y = FFMIN(fc->ps.pps->height, ((cu->y0 >> sps->ctb_log2_size_y) + 1) << sps->ctb_log2_size_y);
         if (cu->y0 + cu->cb_height >= max_y)
             cand_bottom_left = 0;
         else
-            cand_bottom_left = SAMPLE_CTB(fc->tab.cb_width[0], x, y) != 0;
+            cand_bottom_left = is_available(fc, cu->x0 - 1, cu->y0 + cu->cb_height);
     }
     return cand_bottom_left;
 }