From 44fe91d5ddc7c015dae12c6cc1504b56a4a0e778 Mon Sep 17 00:00:00 2001
From: Guillaume Roguez <guillaume.roguez@savoirfairelinux.com>
Date: Thu, 19 Mar 2015 15:44:11 -0400
Subject: [PATCH] implement fps log display within ShmRenderer
You need to uncomment the #define DEBUG_FPS line
in shmrenderer code to enable logging.
Refs #68901
---
src/private/shmrenderer.cpp | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/src/private/shmrenderer.cpp b/src/private/shmrenderer.cpp
index f8737d12..d35243f7 100644
--- a/src/private/shmrenderer.cpp
+++ b/src/private/shmrenderer.cpp
@@ -40,6 +40,11 @@
#include "video/resolution.h"
#include "private/videorenderer_p.h"
+//#define DEBUG_FPS
+#ifdef DEBUG_FPS
+#include <chrono>
+#endif
+
///Shared memory object
struct SHMHeader {
sem_t notification;
@@ -75,6 +80,11 @@ public:
int m_Fps ;
QTime m_CurrentTime;
+#ifdef DEBUG_FPS
+ unsigned m_frameCount;
+ std::chrono::time_point<std::chrono::system_clock> m_lastFrameDebug;
+#endif
+
//Constants
static const int TIMEOUT_SEC = 1; // 1 second
@@ -97,6 +107,10 @@ Video::ShmRendererPrivate::ShmRendererPrivate(Video::ShmRenderer* parent) : QObj
fd(-1),m_fpsC(0),m_Fps(0),
m_pShmArea((SHMHeader*)MAP_FAILED), m_ShmAreaLen(0), m_BufferGen(0),
m_pTimer(nullptr)
+#ifdef DEBUG_FPS
+ , m_frameCount(0)
+ , m_lastFrameDebug(std::chrono::system_clock::now())
+#endif
{
}
@@ -163,6 +177,17 @@ bool Video::ShmRendererPrivate::renderToBitmap()
static_cast<Video::Renderer*>(q_ptr)->d_ptr->updateFrameIndex();
shmUnlock();
+#ifdef DEBUG_FPS
+ auto currentTime = std::chrono::system_clock::now();
+ const std::chrono::duration<double> seconds = currentTime - m_lastFrameDebug;
+ ++m_frameCount;
+ if (seconds.count() > 1) {
+ qDebug() << this << ": FPS " << (m_frameCount / seconds.count());
+ m_frameCount = 0;
+ m_lastFrameDebug = currentTime;
+ }
+#endif
+
return true;
#else
return false;
--
GitLab