avcodec/utils : add ff_int_from_list_or_default func

to check valid value, or return default_value

1 files changed, 19 insertions, 0 deletions

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index c4c64a6ca4..2fa811d499 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -2209,3 +2209,22 @@ int64_t ff_guess_coded_bitrate(AVCodecContext *avctx)
 
     return bitrate;
 }
+
+int ff_int_from_list_or_default(void *ctx, const char * val_name, int val,
+                                const int * array_valid_values, int default_value)
+{
+    int i = 0, ref_val;
+
+    while (1) {
+        ref_val = array_valid_values[i];
+        if (ref_val == INT_MAX)
+            break;
+        if (val == ref_val)
+            return val;
+        i++;
+    }
+    /* val is not a valid value */
+    av_log(ctx, AV_LOG_DEBUG,
+           "%s %d are not supported. Set to default value : %d\n", val_name, val, default_value);
+    return default_value;
+}