libavdevice/decklink: add support for -sources and -sinks arguments

Add support for enumerating the sources/sinks via the ffmpeg
command line options, as opposed to having to create a real pipeline
and use the "-list_devices" option which does exit() after dumping
out the options.

Note that this patch preserves the existing "-list_devices" option,
but now shares common code for the actual enumeration.

Updated to reflect feedback from Marton Balint <cus@passwd.hu>.

Signed-off-by: Devin Heitmueller <dheitmueller@ltnglobal.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

1 files changed, 8 insertions, 2 deletions

diff --git a/libavdevice/decklink_enc.cpp b/libavdevice/decklink_enc.cpp
index 25ce7d026c..0776741812 100644
--- a/libavdevice/decklink_enc.cpp
+++ b/libavdevice/decklink_enc.cpp
@@ -33,6 +33,7 @@ extern "C" {
 extern "C" {
 #include "libavformat/avformat.h"
 #include "libavutil/imgutils.h"
+#include "avdevice.h"
 }
 
 #include "decklink_common.h"
@@ -335,9 +336,9 @@ av_cold int ff_decklink_write_header(AVFormatContext *avctx)
     ctx->preroll      = cctx->preroll;
     cctx->ctx = ctx;
 
-    /* List available devices. */
+    /* List available devices and exit. */
     if (ctx->list_devices) {
-        ff_decklink_list_devices(avctx);
+        ff_decklink_list_devices_legacy(avctx, 0, 1);
         return AVERROR_EXIT;
     }
 
@@ -400,4 +401,9 @@ int ff_decklink_write_packet(AVFormatContext *avctx, AVPacket *pkt)
     return AVERROR(EIO);
 }
 
+int ff_decklink_list_output_devices(AVFormatContext *avctx, struct AVDeviceInfoList *device_list)
+{
+    return ff_decklink_list_devices(avctx, device_list, 0, 1);
+}
+
 } /* extern "C" */