[FFmpeg-devel] [PATCH v2 2/3] avfilter/vf_colorbalance: change to float to make framecrc same for 32 and 64bit system

[lance.lmwang at gmail.com]

From: Limin Wang <lance.lmwang at gmail.com>

Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
---
 libavfilter/vf_colorbalance.c | 36 +++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/libavfilter/vf_colorbalance.c b/libavfilter/vf_colorbalance.c
index 3fd1426696..1ab3a61039 100644
--- a/libavfilter/vf_colorbalance.c
+++ b/libavfilter/vf_colorbalance.c
@@ -36,9 +36,9 @@ typedef struct ThreadData {
 } ThreadData;
 
 typedef struct Range {
-    double shadows;
-    double midtones;
-    double highlights;
+    float shadows;
+    float midtones;
+    float highlights;
 } Range;
 
 typedef struct ColorBalanceContext {
@@ -57,15 +57,15 @@ typedef struct ColorBalanceContext {
 #define OFFSET(x) offsetof(ColorBalanceContext, x)
 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 static const AVOption colorbalance_options[] = {
-    { "rs", "set red shadows",      OFFSET(cyan_red.shadows),         AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
-    { "gs", "set green shadows",    OFFSET(magenta_green.shadows),    AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
-    { "bs", "set blue shadows",     OFFSET(yellow_blue.shadows),      AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
-    { "rm", "set red midtones",     OFFSET(cyan_red.midtones),        AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
-    { "gm", "set green midtones",   OFFSET(magenta_green.midtones),   AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
-    { "bm", "set blue midtones",    OFFSET(yellow_blue.midtones),     AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
-    { "rh", "set red highlights",   OFFSET(cyan_red.highlights),      AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
-    { "gh", "set green highlights", OFFSET(magenta_green.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
-    { "bh", "set blue highlights",  OFFSET(yellow_blue.highlights),   AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
+    { "rs", "set red shadows",      OFFSET(cyan_red.shadows),         AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, FLAGS },
+    { "gs", "set green shadows",    OFFSET(magenta_green.shadows),    AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, FLAGS },
+    { "bs", "set blue shadows",     OFFSET(yellow_blue.shadows),      AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, FLAGS },
+    { "rm", "set red midtones",     OFFSET(cyan_red.midtones),        AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, FLAGS },
+    { "gm", "set green midtones",   OFFSET(magenta_green.midtones),   AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, FLAGS },
+    { "bm", "set blue midtones",    OFFSET(yellow_blue.midtones),     AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, FLAGS },
+    { "rh", "set red highlights",   OFFSET(cyan_red.highlights),      AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, FLAGS },
+    { "gh", "set green highlights", OFFSET(magenta_green.highlights), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, FLAGS },
+    { "bh", "set blue highlights",  OFFSET(yellow_blue.highlights),   AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, FLAGS },
     { NULL }
 };
 
@@ -95,12 +95,12 @@ static int query_formats(AVFilterContext *ctx)
     return ff_set_common_formats(ctx, fmts_list);
 }
 
-static int get_component(int c, int depth, double l,
-                         double s, double m, double h)
+static int get_component(int c, int depth, float l,
+                         float s, float m, float h)
 {
-    const double a = 4, b = 0.333, scale = 0.7;
-    const double max = (1 << depth) - 1;
-    double v = c / max;
+    const float a = 4, b = 0.333, scale = 0.7;
+    const float max = (1 << depth) - 1;
+    float v = c / max;
 
     l /= max;
 
@@ -112,7 +112,7 @@ static int get_component(int c, int depth, double l,
     v += m;
     v += h;
     v = av_clipd(v, 0, 1);
-    c = v * max;
+    c = v * max + 0.5;
 
     return av_clip_uintp2_c(c, depth);
 }
-- 
2.21.0