From e8d1de3fc7e5aa2395145c4c4d8046fde4a1f578 Mon Sep 17 00:00:00 2001
From: Dan Dennedy <dan@dennedy.org>
Date: Wed, 22 Feb 2012 18:59:57 -0800
Subject: [PATCH] fix regression when using producer 'consumer' with decklink

This feature now requires one to set the preview property on this
producer to support special preview mode when the speed is 0.
---
 src/modules/decklink/producer_decklink.cpp | 3 ++-
 src/modules/decklink/producer_decklink.yml | 9 +++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/modules/decklink/producer_decklink.cpp b/src/modules/decklink/producer_decklink.cpp
index be340668..ea00f945 100644
--- a/src/modules/decklink/producer_decklink.cpp
+++ b/src/modules/decklink/producer_decklink.cpp
@@ -357,7 +357,8 @@ public:
 			IDeckLinkVideoInputFrame* video,
 			IDeckLinkAudioInputPacket* audio )
 	{
-		if ( mlt_producer_get_speed( getProducer() ) == 0.0 && !mlt_deque_count( m_queue ))
+		if ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( getProducer() ), "preview" ) &&
+			mlt_producer_get_speed( getProducer() ) == 0.0 && !mlt_deque_count( m_queue ))
 		{
 			pthread_cond_broadcast( &m_condition );
 			return S_OK;
diff --git a/src/modules/decklink/producer_decklink.yml b/src/modules/decklink/producer_decklink.yml
index 3d60725e..bc8fa63d 100644
--- a/src/modules/decklink/producer_decklink.yml
+++ b/src/modules/decklink/producer_decklink.yml
@@ -75,3 +75,12 @@ parameters:
     default: 0
     unit: lines
     widget: spinner
+
+  - identifier: preview
+    title: Enable preview
+    description: Support preview monitoring when paused (speed = 0).
+    type: integer
+    minimum: 0
+    maximum: 1
+    default: 0
+    widget: checkbox
-- 
2.39.2