From: Marco Gittler <marco@gitma.de>
Date: Mon, 27 Sep 2010 20:14:41 +0000 (+0000)
Subject: waveform display
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=ec00934b188e717301b9fe2477f9a0993f5fb982;p=kdenlive

waveform display

svn path=/trunk/kdenlive/; revision=4944
---

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8d38fad6..2c48801b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -217,6 +217,7 @@ set(kdenlive_SRCS
   monitorscene.cpp
   geometrywidget.cpp
   doubleparameterwidget.cpp
+  audiosignal.cpp
 )
 
 
diff --git a/src/monitor.cpp b/src/monitor.cpp
index f7ae4644..f61ba571 100644
--- a/src/monitor.cpp
+++ b/src/monitor.cpp
@@ -26,6 +26,7 @@
 #include "monitorscene.h"
 #include "abstractclipitem.h"
 #include "kdenlivesettings.h"
+#include "audiosignal.h"
 
 #include <KDebug>
 #include <KLocale>
@@ -48,6 +49,7 @@
 Monitor::Monitor(QString name, MonitorManager *manager, QString profile, QWidget *parent) :
     QWidget(parent),
     render(NULL),
+	m_audiosignal(NULL),
     m_name(name),
     m_monitorManager(manager),
     m_currentClip(NULL),
@@ -152,6 +154,9 @@ Monitor::Monitor(QString name, MonitorManager *manager, QString profile, QWidget
     render = new Render(m_name, (int) m_monitorRefresh->winId(), -1, profile, this);
     m_monitorRefresh->setRenderer(render);
 #endif
+	m_audiosignal= new AudioSignal(this);
+	rendererBox->addWidget(m_audiosignal);
+    connect(render, SIGNAL(showAudioSignal(QByteArray)), m_audiosignal, SLOT(showAudio(QByteArray)));
 
     connect(m_ruler, SIGNAL(seekRenderer(int)), this, SLOT(slotSeek(int)));
     connect(render, SIGNAL(durationChanged(int)), this, SLOT(adjustRulerSize(int)));
diff --git a/src/monitor.h b/src/monitor.h
index 8a2bd274..ddfe2804 100644
--- a/src/monitor.h
+++ b/src/monitor.h
@@ -45,6 +45,7 @@ class Transition;
 class ClipItem;
 class QGraphicsView;
 class QGraphicsPixmapItem;
+class AudioSignal;
 
 class MonitorRefresh : public QWidget
 {
@@ -142,6 +143,7 @@ private:
 #ifdef Q_WS_MAC
     VideoGLWidget *m_glWidget;
 #endif
+	AudioSignal *m_audiosignal;
 
     GenTime getSnapForPos(bool previous);
 
diff --git a/src/renderer.cpp b/src/renderer.cpp
index 600dcfad..80ae7c38 100644
--- a/src/renderer.cpp
+++ b/src/renderer.cpp
@@ -64,7 +64,7 @@ static void consumer_frame_show(mlt_consumer, Render * self, mlt_frame frame_ptr
 #ifdef Q_WS_MAC
     self->showFrame(frame);
 #endif
-
+	self->showAudio(frame);
     self->emitFrameNumber(mlt_frame_get_position(frame_ptr));
     if (self->sendFrameForAnalysis && frame_ptr->convert_image) {
         self->emitFrameUpdated(frame);
@@ -1493,6 +1493,47 @@ void Render::showFrame(Mlt::Frame& frame)
 }
 #endif
 
+void Render::showAudio(Mlt::Frame& frame)
+{
+	mlt_audio_format audio_format=mlt_audio_pcm;
+	int freq,num_channels,samples;
+	uint8_t* data=(uint8_t*)frame.get_audio(audio_format,freq,num_channels,samples);
+	if (!data)
+		return;
+	int value=0;
+	QByteArray channels;
+
+	for (int i=0;i<num_channels;i++){
+	/*	switch (audio_format)
+		{
+			case 0:
+				value=( ( (uint8_t*)data) [i]   );
+				break;
+			case 1:
+				value=( ( (uint16_t*)data) [i]  >> 8 );
+				break;
+			case 2:
+				value=( ((uint32_t*)data) [i] >> 16 );
+				break;
+			case 3:
+				value=( ((float*)data) [i]*255);
+				break;
+			default:
+				value=0;
+		}
+		*/
+		long val=0;
+		int num_samples=20;
+		for (int s=0;s<samples;s+=samples/num_samples){
+			val+=(data[i+s*num_channels]- 127);
+		}
+		channels.append(val/num_samples);
+	}
+
+
+	if (samples>0)
+		emit showAudioSignal(channels);
+}
 
 /*
  * MLT playlist direct manipulation.
diff --git a/src/renderer.h b/src/renderer.h
index 6c9c0b8b..60b9ed9e 100644
--- a/src/renderer.h
+++ b/src/renderer.h
@@ -262,6 +262,7 @@ Q_OBJECT public:
 #ifdef Q_WS_MAC
     void showFrame(Mlt::Frame&);
 #endif
+	void showAudio(Mlt::Frame&);
     /** @brief This property is used to decide if the renderer should convert it's frames to QImage for use in other Kdenlive widgets. */
     bool sendFrameForAnalysis;
     QList <int> checkTrackSequence(int);
@@ -357,6 +358,7 @@ signals:
      *
      * Used in Mac OS X. */
     void showImageSignal(QImage);
+    void showAudioSignal(QByteArray);
     /** @brief The renderer refreshed the current frame, but no seeking was done. */
     void frameUpdated(QImage);