lavd: add avdevice_dev_to_app_control_message API

New API allows to send messages from devices to application.

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/libavdevice/avdevice.c b/libavdevice/avdevice.c
index c232bbdc8f..51617fb921 100644
--- a/libavdevice/avdevice.c
+++ b/libavdevice/avdevice.c
@@ -44,3 +44,11 @@ int avdevice_app_to_dev_control_message(struct AVFormatContext *s, enum AVAppToD
         return AVERROR(ENOSYS);
     return s->oformat->control_message(s, type, data, data_size);
 }
+
+int avdevice_dev_to_app_control_message(struct AVFormatContext *s, enum AVDevToAppMessageType type,
+                                        void *data, size_t data_size)
+{
+    if (!s->control_message_cb)
+        return AVERROR(ENOSYS);
+    return s->control_message_cb(s, type, data, data_size);
+}