From de230254bda2b476068c0bd99ad0004e92a31f94 Mon Sep 17 00:00:00 2001
From: Paul Licameli <paul.licameli@audacityteam.org>
Date: Sat, 12 May 2018 21:47:19 -0400
Subject: [PATCH] Add to recording preferences for pre-roll and crossfade

---
 src/AudioIO.h                |  6 ++++++
 src/prefs/RecordingPrefs.cpp | 28 +++++++++++++++++++++++++++-
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/src/AudioIO.h b/src/AudioIO.h
index 22c0bb384..c9ee5578d 100644
--- a/src/AudioIO.h
+++ b/src/AudioIO.h
@@ -85,6 +85,12 @@ class AudioIOListener;
 #define DEFAULT_LATENCY_DURATION 100.0
 #define DEFAULT_LATENCY_CORRECTION -130.0
 
+#define AUDIO_PRE_ROLL_KEY (wxT("/AudioIO/PreRoll"))
+#define DEFAULT_PRE_ROLL_SECONDS 5.0
+
+#define AUDIO_ROLL_CROSSFADE_KEY (wxT("/AudioIO/Crossfade"))
+#define DEFAULT_ROLL_CROSSFADE_MS 10.0
+
 #ifdef EXPERIMENTAL_AUTOMATED_INPUT_LEVEL_ADJUSTMENT
    #define AILA_DEF_TARGET_PEAK 92
    #define AILA_DEF_DELTA_PEAK 2
diff --git a/src/prefs/RecordingPrefs.cpp b/src/prefs/RecordingPrefs.cpp
index cee059adb..c2b475a82 100644
--- a/src/prefs/RecordingPrefs.cpp
+++ b/src/prefs/RecordingPrefs.cpp
@@ -19,6 +19,7 @@
 *//********************************************************************/
 
 #include "../Audacity.h"
+#include "../Experimental.h"
 #include "RecordingPrefs.h"
 
 #include <wx/defs.h>
@@ -222,8 +223,33 @@ void RecordingPrefs::PopulateOrExchange(ShuttleGui & S)
       }
       S.EndStatic();
    #endif
-   S.EndScroller();
 
+#ifdef EXPERIMENTAL_PUNCH_AND_ROLL
+      S.StartStatic(_("Punch and Roll Recording"));
+      {
+         S.StartThreeColumn();
+         {
+            auto w = S.TieNumericTextBox(_("Pre-ro&ll duration:"),
+               AUDIO_PRE_ROLL_KEY,
+               DEFAULT_PRE_ROLL_SECONDS,
+               9);
+            S.AddUnits(_("seconds"));
+            w->SetName(w->GetName() + wxT(" ") + _("seconds"));
+         }
+         {
+            auto w = S.TieNumericTextBox(_("Cross&fade:"),
+               AUDIO_ROLL_CROSSFADE_KEY,
+               DEFAULT_ROLL_CROSSFADE_MS,
+               9);
+            S.AddUnits(_("milliseconds"));
+            w->SetName(w->GetName() + wxT(" ") + _("milliseconds"));
+         }
+         S.EndThreeColumn();
+      }
+      S.EndStatic();
+#endif
+
+      S.EndScroller();
 }
 
 bool RecordingPrefs::Commit()