From 67f01088278dd304b56a60e2469b86091b91122e Mon Sep 17 00:00:00 2001
From: itsmattkc <34096995+itsmattkc@users.noreply.github.com>
Date: Mon, 11 Oct 2021 23:14:50 -0700
Subject: [PATCH] viewer: pause audio cache on playback

---
 app/render/previewautocacher.cpp | 11 ++++++++++-
 app/render/previewautocacher.h   |  4 ++++
 app/widget/viewer/viewer.cpp     |  6 ++++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/app/render/previewautocacher.cpp b/app/render/previewautocacher.cpp
index 86cfaa384..03a94efd9 100644
--- a/app/render/previewautocacher.cpp
+++ b/app/render/previewautocacher.cpp
@@ -41,6 +41,7 @@ const bool PreviewAutoCacher::kRealTimeWaveformsEnabled = true;
 PreviewAutoCacher::PreviewAutoCacher() :
   viewer_node_(nullptr),
   use_custom_range_(false),
+  pause_audio_(false),
   single_frame_render_(nullptr)
 {
   // Set defaults
@@ -532,6 +533,14 @@ void PreviewAutoCacher::CancelAudioTasks(bool and_wait_for_them_to_finish)
   CancelTasks(audio_tasks_, and_wait_for_them_to_finish);
 }
 
+void PreviewAutoCacher::SetAudioPaused(bool e)
+{
+  pause_audio_ = e;
+  if (!e) {
+    TryRender();
+  }
+}
+
 void PreviewAutoCacher::NodeAdded(Node *node)
 {
   graph_update_queue_.append({QueuedJob::kNodeAdded, node, NodeInput(), nullptr});
@@ -672,7 +681,7 @@ void PreviewAutoCacher::TryRender()
   }
 
   // Handle audio tasks
-  while (!audio_iterator_.isEmpty() && audio_tasks_.size() < max_tasks) {
+  while (!audio_iterator_.isEmpty() && audio_tasks_.size() < max_tasks && !pause_audio_) {
     // Copy first range in list
     TimeRange r = audio_iterator_.first();
 
diff --git a/app/render/previewautocacher.h b/app/render/previewautocacher.h
index 246b0d1ff..ad4665da3 100644
--- a/app/render/previewautocacher.h
+++ b/app/render/previewautocacher.h
@@ -99,6 +99,8 @@ public:
     return queued_frame_iterator_.IsCustomRange() && queued_frame_iterator_.HasNext();
   }
 
+  void SetAudioPaused(bool e);
+
 signals:
   void StopCacheProxyTasks();
 
@@ -182,6 +184,8 @@ private:
   TimeRangeList invalidated_video_;
   TimeRangeList invalidated_audio_;
 
+  bool pause_audio_;
+
   RenderTicketPtr single_frame_render_;
 
   QList<QFutureWatcher< QVector<HashData> >*> hash_tasks_;
diff --git a/app/widget/viewer/viewer.cpp b/app/widget/viewer/viewer.cpp
index 627613e40..7054fab40 100644
--- a/app/widget/viewer/viewer.cpp
+++ b/app/widget/viewer/viewer.cpp
@@ -634,6 +634,8 @@ void ViewerWidget::PlayInternal(int speed, bool in_to_out_only)
       viewer->PauseInternal();
       viewer->ClearVideoAutoCacherQueue();
     }
+
+    viewer->auto_cacher_.SetAudioPaused(true);
   }
 
   // If the playhead is beyond the end, restart at 0
@@ -722,6 +724,10 @@ void ViewerWidget::PauseInternal()
       tempo_processor_.Close();
     }
 
+    foreach (ViewerWidget* viewer, instances_) {
+      viewer->auto_cacher_.SetAudioPaused(false);
+    }
+
     UpdateTextureFromNode();
   }