From fefb8e4376d675868a11c438f18c1a059d0cfced Mon Sep 17 00:00:00 2001
From: Jean-Baptiste Mardelle <jb@kdenlive.org>
Date: Sun, 12 Jun 2011 13:06:53 +0000
Subject: [PATCH] Fix freeze when making fast play / pause

svn path=/trunk/kdenlive/; revision=5704
---
 src/monitor.cpp  |  3 ++-
 src/renderer.cpp | 34 +++++++++++++++-------------------
 src/renderer.h   |  2 +-
 3 files changed, 18 insertions(+), 21 deletions(-)

diff --git a/src/monitor.cpp b/src/monitor.cpp
index efc1d036..4cf150df 100644
--- a/src/monitor.cpp
+++ b/src/monitor.cpp
@@ -771,11 +771,12 @@ void Monitor::slotPlay()
     if (render->playSpeed() == 0) {
         //m_playAction->setChecked(true);
         m_playAction->setIcon(m_pauseIcon);
+        render->switchPlay(true);
     } else {
         //m_playAction->setChecked(false);
         m_playAction->setIcon(m_playIcon);
+        render->switchPlay(false);
     }
-    render->switchPlay();
 }
 
 void Monitor::slotPlayZone()
diff --git a/src/renderer.cpp b/src/renderer.cpp
index 6e29306c..3e187301 100644
--- a/src/renderer.cpp
+++ b/src/renderer.cpp
@@ -71,14 +71,21 @@ static void consumer_frame_show(mlt_consumer, Render * self, mlt_frame frame_ptr
     if (self->analyseAudio) {
         self->showAudio(frame);
     }
-    if (frame.get_double("_speed") == 0.0) {
-        self->emitConsumerStopped();
-    } else if (frame.get_double("_speed") < 0.0 && mlt_frame_get_position(frame_ptr) <= 0) {
+    if (frame.get_double("_speed") < 0.0 && mlt_frame_get_position(frame_ptr) <= 0) {
         self->pause();
         self->emitConsumerStopped();
     }
 }
 
+
+static void consumer_paused(mlt_consumer, Render * self, mlt_frame /*frame_ptr*/)
+{
+    // detect if the producer has finished playing. Is there a better way to do it?
+    if (self->m_isBlocked) return;
+    self->emitConsumerStopped();
+}
+
+
 static void consumer_gl_frame_show(mlt_consumer, Render * self, mlt_frame frame_ptr)
 {
     // detect if the producer has finished playing. Is there a better way to do it?
@@ -240,6 +247,7 @@ void Render::buildConsumer(const QString profileName)
         m_mltConsumer = new Mlt::Consumer(*m_mltProfile, "sdl_preview");
         // FIXME: the event object returned by the listen gets leaked...
         m_mltConsumer->listen("consumer-frame-show", this, (mlt_listener) consumer_frame_show);
+        m_mltConsumer->listen("consumer-sdl-paused", this, (mlt_listener) consumer_paused);
         m_mltConsumer->set("window_id", m_winid);
     }
     m_mltConsumer->set("resize", 1);
@@ -1314,36 +1322,24 @@ void Render::pause()
     m_mltConsumer->purge();
 }
 
-void Render::switchPlay()
+void Render::switchPlay(bool play)
 {
     if (!m_mltProducer || !m_mltConsumer)
         return;
     if (m_isZoneMode) resetZoneMode();
-    if (m_mltProducer->get_speed() == 0.0) {
+    if (play && m_mltProducer->get_speed() == 0.0) {
         m_isBlocked = false;
         if (m_name == "clip" && m_framePosition == (int) m_mltProducer->get_out()) m_mltProducer->seek(0);
         m_mltProducer->set_speed(1.0);
         m_mltConsumer->set("refresh", 1);
-    } else {
+    } else if (!play) {
         m_isBlocked = true;
         m_mltConsumer->set("refresh", 0);
         m_mltProducer->set_speed(0.0);
         //emit rendererPosition(m_framePosition);
         m_mltProducer->seek(m_framePosition);
-        m_mltConsumer->purge();
-        //kDebug()<<" *********  RENDER PAUSE: "<<m_mltProducer->get_speed();
-        //m_mltConsumer->set("refresh", 0);
-        /*mlt_position position = mlt_producer_position( m_mltProducer->get_producer() );
-        m_mltProducer->set_speed(0);
-        m_mltProducer->seek( position );
-               //m_mltProducer->seek((int) m_framePosition);
-               m_isBlocked = false;*/
+        //m_mltConsumer->purge();
     }
-    /*if (speed == 0.0) {
-    m_mltProducer->seek((int) m_framePosition + 1);
-        m_mltConsumer->purge();
-    }*/
-    //refresh();
 }
 
 void Render::play(double speed)
diff --git a/src/renderer.h b/src/renderer.h
index b3abe536..2be48efb 100644
--- a/src/renderer.h
+++ b/src/renderer.h
@@ -122,7 +122,7 @@ Q_OBJECT public:
      * The speed is relative to normal playback, e.g. 1.0 is normal speed, 0.0
      * is paused, -1.0 means play backwards. It does not specify start/stop */
     void play(double speed);
-    void switchPlay();
+    void switchPlay(bool play);
     void pause();
 
     /** @brief Stops playing.
-- 
2.39.2