avdevice/decklink_enc: add support for setting genlock timing offset

Signed-off-by: Marton Balint <cus@passwd.hu>

doc/outdevs.texi

@@ -155,6 +155,10 @@ Defaults to @option{0.5}.
 Sets the decklink device duplex mode. Must be @samp{unset}, @samp{half} or @samp{full}.
 Defaults to @samp{unset}.
 
+@item timing_offset
+Sets the genlock timing pixel offset on the used output.
+Defaults to @samp{unset}.
+
 @end table
 
 @subsection Examples

libavdevice/decklink_common.cpp

@@ -171,6 +171,11 @@ int ff_decklink_set_configs(AVFormatContext *avctx,
         if (ret < 0)
             return ret;
     }
+    if (direction == DIRECTION_OUT && cctx->timing_offset != INT_MIN) {
+        res = ctx->cfg->SetInt(bmdDeckLinkConfigReferenceInputTimingOffset, cctx->timing_offset);
+        if (res != S_OK)
+            av_log(avctx, AV_LOG_WARNING, "Setting timing offset failed.\n");
+    }
     return 0;
 }
 

libavdevice/decklink_common_c.h

@@ -57,6 +57,7 @@ struct decklink_cctx {
     int64_t queue_size;
     int copyts;
     int64_t timestamp_align;
+    int timing_offset;
 };
 
 #endif /* AVDEVICE_DECKLINK_COMMON_C_H */

libavdevice/decklink_enc_c.c

@@ -35,6 +35,8 @@ static const AVOption options[] = {
     { "unset"       ,  NULL                     , 0                   , AV_OPT_TYPE_CONST , { .i64 = 0   }, 0, 0, ENC, "duplex_mode"},
     { "half"        ,  NULL                     , 0                   , AV_OPT_TYPE_CONST , { .i64 = 1   }, 0, 0, ENC, "duplex_mode"},
     { "full"        ,  NULL                     , 0                   , AV_OPT_TYPE_CONST , { .i64 = 2   }, 0, 0, ENC, "duplex_mode"},
+    { "timing_offset", "genlock timing pixel offset", OFFSET(timing_offset), AV_OPT_TYPE_INT,   { .i64 = INT_MIN }, INT_MIN, INT_MAX, ENC, "timing_offset"},
+    { "unset"       ,  NULL                     , 0                        , AV_OPT_TYPE_CONST, { .i64 = INT_MIN },       0,       0, ENC, "timing_offset"},
     { NULL },
 };
 

libavdevice/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVDEVICE_VERSION_MAJOR  58
 #define LIBAVDEVICE_VERSION_MINOR   6
-#define LIBAVDEVICE_VERSION_MICRO 100
+#define LIBAVDEVICE_VERSION_MICRO 101
 
 #define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
                                                LIBAVDEVICE_VERSION_MINOR, \