added setting for fast seeking

dialogs/preferencesdialog.cpp

@@ -22,6 +22,8 @@ PreferencesDialog::PreferencesDialog(QWidget *parent) :
 {
     ui->setupUi(this);
 
+    ui->accurateSeekButton->setChecked(!config.fast_seeking);
+    ui->fastSeekButton->setChecked(config.fast_seeking);
 	ui->recordingComboBox->setCurrentIndex(config.recording_mode - 1);
     ui->imgSeqFormatEdit->setText(config.img_seq_formats);
 }
@@ -77,4 +79,5 @@ void PreferencesDialog::setup_kbd_shortcuts(QMenuBar* menubar) {
 void PreferencesDialog::on_buttonBox_accepted() {
 	config.recording_mode = ui->recordingComboBox->currentIndex() + 1;
     config.img_seq_formats = ui->imgSeqFormatEdit->text();
+    config.fast_seeking = ui->fastSeekButton->isChecked();
 }

dialogs/preferencesdialog.ui

@@ -17,7 +17,7 @@
    <item>
     <widget class="QTabWidget" name="tabWidget">
      <property name="currentIndex">
-      <number>0</number>
+      <number>2</number>
      </property>
      <widget class="QWidget" name="tab">
       <attribute name="title">
@@ -62,6 +62,38 @@
        <string>Behavior</string>
       </attribute>
      </widget>
+     <widget class="QWidget" name="tab_4">
+      <attribute name="title">
+       <string>Playback</string>
+      </attribute>
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <item>
+        <widget class="QGroupBox" name="groupBox">
+         <property name="title">
+          <string>Seeking</string>
+         </property>
+         <layout class="QVBoxLayout" name="verticalLayout_3">
+          <item>
+           <widget class="QRadioButton" name="accurateSeekButton">
+            <property name="text">
+             <string>Accurate Seeking
+Always show the correct frame (visual may pause briefly as correct frame is retrieved)</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QRadioButton" name="fastSeekButton">
+            <property name="text">
+             <string>Fast Seeking
+Seek quickly (may briefly show inaccurate frames when seeking - doesn't affect playback/export)</string>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </widget>
+       </item>
+      </layout>
+     </widget>
      <widget class="QWidget" name="tab_3">
       <attribute name="title">
        <string>Keyboard</string>

io/config.cpp

@@ -30,7 +30,8 @@ Config::Config()
       enable_audio_scrubbing(true),
       drop_on_media_to_replace(true),
       autoscroll(AUTOSCROLL_PAGE_SCROLL),
-      audio_rate(48000)
+      audio_rate(48000),
+      fast_seeking(false)
 {}
 
 void Config::load(QString path) {
@@ -107,6 +108,9 @@ void Config::load(QString path) {
                 } else if (stream.name() == "AudioRate") {
                     stream.readNext();
                     audio_rate = stream.text().toInt();
+                } else if (stream.name() == "FastSeeking") {
+                    stream.readNext();
+                    fast_seeking = (stream.text() == "1");
                 }
             }
         }
@@ -153,6 +157,7 @@ void Config::save(QString path) {
     stream.writeTextElement("DropFileOnMediaToReplace", QString::number(drop_on_media_to_replace));
     stream.writeTextElement("Autoscroll", QString::number(autoscroll));
     stream.writeTextElement("AudioRate", QString::number(audio_rate));
+    stream.writeTextElement("FastSeeking", QString::number(fast_seeking));
 
 	stream.writeEndElement(); // configuration
     stream.writeEndDocument(); // doc

io/config.h

@@ -42,6 +42,7 @@ struct Config {
     bool drop_on_media_to_replace;
     int autoscroll;
     int audio_rate;
+    bool fast_seeking;
 
     void load(QString path);
     void save(QString path);

playback/playback.cpp

@@ -11,6 +11,7 @@
 #include "project/effect.h"
 #include "panels/effectcontrols.h"
 #include "project/media.h"
+#include "io/config.h"
 #include "debug.h"
 
 extern "C" {
@@ -193,7 +194,7 @@ void get_clip_frame(Clip* c, long playhead) {
 #ifdef GCF_DEBUG
 							dout << "GCF ==> RESET" << target_pts << "(" << target_frame->pts << "-" << target_frame->pts+target_frame->pkt_duration << ")";
 #endif
-                            target_frame = NULL;
+                            if (!config.fast_seeking) target_frame = NULL;
 							reset = true;
                             c->last_invalid_ts = target_pts;
 						} else {