lavu: add helper functions for integer lists.

Add av_int_list_length() to compute a list length.
Add av_opt_set_int_list() to set a binary option.

Signed-off-by: Nicolas George <nicolas.george@normalesup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 14 insertions, 0 deletions

diff --git a/libavutil/opt.h b/libavutil/opt.h
index 30f729e447..e368259455 100644
--- a/libavutil/opt.h
+++ b/libavutil/opt.h
@@ -656,6 +656,20 @@ int av_opt_set_image_size(void *obj, const char *name, int w, int h, int search_
 int av_opt_set_pixel_fmt (void *obj, const char *name, enum AVPixelFormat fmt, int search_flags);
 int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags);
 int av_opt_set_video_rate(void *obj, const char *name, AVRational val, int search_flags);
+
+/**
+ * Set a binary option to an integer list.
+ *
+ * @param obj    AVClass object to set options on
+ * @param name   name of the binary option
+ * @param val    pointer to an integer list (must have the correct type with
+ *               regard to the contents of the list)
+ * @param term   list terminator (usually 0 or -1)
+ * @param flags  search flags
+ */
+#define av_opt_set_int_list(obj, name, val, term, flags) \
+    av_opt_set_bin(obj, name, (const uint8_t *)val, \
+                   av_int_list_length(val, term) * sizeof(*val), flags)
 /**
  * @}
  */