[FFmpeg-devel] [PATCH v4 03/22] avformat: add control_message function to AVInputFormat

[Diederick Niehorster <dcnieho@gmail.com>]

Control messages are useful for programmatic control of not only outdevs
but also indevs.

Bumping avformat version.

Signed-off-by: Diederick Niehorster <dcnieho@gmail.com>
---
 libavdevice/avdevice.c | 8 +++++---
 libavformat/avformat.h | 6 ++++++
 libavformat/version.h  | 2 +-
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/libavdevice/avdevice.c b/libavdevice/avdevice.c
index 9b684251aa..617c28d725 100644
--- a/libavdevice/avdevice.c
+++ b/libavdevice/avdevice.c
@@ -66,9 +66,11 @@ const char * avdevice_license(void)
 int avdevice_app_to_dev_control_message(struct AVFormatContext *s, enum AVAppToDevMessageType type,
                                         void *data, size_t data_size)
 {
-    if (!s->oformat || !s->oformat->control_message)
-        return AVERROR(ENOSYS);
-    return s->oformat->control_message(s, type, data, data_size);
+    if (s->oformat && s->oformat->control_message)
+        return s->oformat->control_message(s, type, data, data_size);
+    if (s->iformat && s->iformat->control_message)
+        return s->iformat->control_message(s, type, data, data_size);
+    return AVERROR(ENOSYS);
 }
 
 int avdevice_dev_to_app_control_message(struct AVFormatContext *s, enum AVDevToAppMessageType type,
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 350912e272..06db024559 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -785,6 +785,12 @@ typedef struct AVInputFormat {
      */
     int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
 
+    /**
+     * Allows sending messages from application to device.
+     */
+    int (*control_message)(struct AVFormatContext *s, int type,
+                           void *data, size_t data_size);
+
     /**
      * Returns device list with it properties.
      * @see avdevice_list_devices() for more details.
diff --git a/libavformat/version.h b/libavformat/version.h
index ac14f8eb37..af5e2c496c 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -32,7 +32,7 @@
 
 #include "version_major.h"
 
-#define LIBAVFORMAT_VERSION_MINOR  21
+#define LIBAVFORMAT_VERSION_MINOR  22
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
-- 
2.28.0.windows.1

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