Signed-off-by: Tobias Rapp <t.r...@noa-archive.com>
---
doc/filters.texi | 4 ++++
libavfilter/f_metadata.c | 10 ++++++++++
2 files changed, 14 insertions(+)
diff --git a/doc/filters.texi b/doc/filters.texi
index 6c5003f..0b874b2 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -8500,6 +8500,10 @@ Can be one of following:
Values are interpreted as strings, returns true if @code{value} is same as
metadata value up
to N chars as set in @code{length} option.
+@item starts_with
+Values are interpreted as strings, returns true if metadata value starts with
+the @code{value} option string.
+
@item less
Values are interpreted as floats, returns true if metadata value is less than
@code{value}.
diff --git a/libavfilter/f_metadata.c b/libavfilter/f_metadata.c
index e0ea30b..20681c5 100644
--- a/libavfilter/f_metadata.c
+++ b/libavfilter/f_metadata.c
@@ -49,6 +49,7 @@ enum MetadataMode {
enum MetadataFunction {
METADATAF_STRING,
+ METADATAF_STARTS_WITH,
METADATAF_LESS,
METADATAF_EQUAL,
METADATAF_GREATER,
@@ -98,6 +99,7 @@ static const AVOption filt_name##_options[] = {
\
{ "value", "set metadata value", OFFSET(value), AV_OPT_TYPE_STRING,
{.str = NULL }, 0, 0, FLAGS }, \
{ "function", "function for comparing values", OFFSET(function),
AV_OPT_TYPE_INT, {.i64 = 0 }, 0, METADATAF_NB-1, FLAGS, "function" }, \
{ "string", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_STRING }, 0,
3, FLAGS, "function" }, \
+ { "starts_with", NULL, 0, AV_OPT_TYPE_CONST, {.i64 =
METADATAF_STARTS_WITH }, 0, 0, FLAGS, "function" }, \
{ "less", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_LESS }, 0,
3, FLAGS, "function" }, \
{ "equal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_EQUAL }, 0,
3, FLAGS, "function" }, \
{ "greater", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_GREATER }, 0,
3, FLAGS, "function" }, \
@@ -112,6 +114,11 @@ static int string(MetadataContext *s, const char *value1,
const char *value2, si
return !strncmp(value1, value2, length);
}
+static int starts_with(MetadataContext *s, const char *value1, const char
*value2, size_t length)
+{
+ return !strncmp(value1, value2, strlen(value2));
+}
+
static int equal(MetadataContext *s, const char *value1, const char *value2,
size_t length)
{
float f1, f2;
@@ -175,6 +182,9 @@ static av_cold int init(AVFilterContext *ctx)
case METADATAF_STRING:
s->compare = string;
break;
+ case METADATAF_STARTS_WITH:
+ s->compare = starts_with;
+ break;
case METADATAF_LESS:
s->compare = less;
break;
--
1.9.1
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