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From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
To: ffmpeg-devel@ffmpeg.org
Cc: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Subject: [FFmpeg-devel] [PATCH 5/5] avfilter/signature_lookup: Avoid branch when adding to linked list
Date: Wed, 14 Feb 2024 13:05:34 +0100
Message-ID: <AS8P250MB074407A36091A0BCBC1BD2868F4E2@AS8P250MB0744.EURP250.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <AS8P250MB07447985D1C6D4DACFA426B28F4E2@AS8P250MB0744.EURP250.PROD.OUTLOOK.COM>

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavfilter/signature_lookup.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/libavfilter/signature_lookup.c b/libavfilter/signature_lookup.c
index ff0d23c5c7..9c69c02fbf 100644
--- a/libavfilter/signature_lookup.c
+++ b/libavfilter/signature_lookup.c
@@ -187,7 +187,7 @@ static MatchingInfo* get_matching_parameters(AVFilterContext *ctx, SignatureCont
     size_t i, j, k, l, hmax = 0, score;
     int framerate, offset, l1dist;
     double m;
-    MatchingInfo *cands = NULL, *c = NULL;
+    MatchingInfo cands = { 0 }, *c = &cands;
 
     struct {
         uint8_t size;
@@ -295,16 +295,10 @@ static MatchingInfo* get_matching_parameters(AVFilterContext *ctx, SignatureCont
         for (i = 0; i < MAX_FRAMERATE; i++) {
             for (j = 0; j < HOUGH_MAX_OFFSET; j++) {
                 if (hmax < hspace[i][j].score) {
-                    if (c == NULL) {
-                        c = av_malloc(sizeof(MatchingInfo));
-                        cands = c;
-                    } else {
-                        c->next = av_malloc(sizeof(MatchingInfo));
-                        c = c->next;
-
-                    }
+                    c->next = av_malloc(sizeof(MatchingInfo));
+                    c = c->next;
                     if (!c) {
-                        sll_free(&cands);
+                        sll_free(&cands.next);
                         goto error;
                     }
                     c->framerateratio = (i+1.0) / 30;
@@ -325,7 +319,7 @@ static MatchingInfo* get_matching_parameters(AVFilterContext *ctx, SignatureCont
     error:
     av_freep(&hspace);
     av_free(hspaces);
-    return cands;
+    return cands.next;
 }
 
 static int iterate_frame(double frr, FineSignature **a, FineSignature **b, int fcount, int *bcount, int dir)
-- 
2.34.1

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  parent reply	other threads:[~2024-02-14 12:04 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-14 12:03 [FFmpeg-devel] [PATCH 1/5] avfilter/vf_signature: Allocate arrays together Andreas Rheinhardt
2024-02-14 12:05 ` [FFmpeg-devel] [PATCH 2/5] avfilter/signature_lookup: Check for allocation error Andreas Rheinhardt
2024-02-14 12:05 ` [FFmpeg-devel] [PATCH 3/5] avfilter/signature_lookup: Allocate buffers jointly Andreas Rheinhardt
2024-02-14 12:05 ` [FFmpeg-devel] [PATCH 4/5] avfilter/signature_lookup: Remove useless error logs Andreas Rheinhardt
2024-02-14 12:05 ` Andreas Rheinhardt [this message]
2024-02-14 12:17 ` [FFmpeg-devel] [PATCH 1/5] avfilter/vf_signature: Allocate arrays together epirat07
2024-02-14 12:24   ` Andreas Rheinhardt
2024-02-18  2:48 ` Andreas Rheinhardt

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