[cadcdev-svn-commits] SF.net SVN: cadcdev: [334] tiki/dc/src/platgl.cpp

[<ba...@us...>]

Revision: 334
Author:   bardtx
Date:     2006-06-05 20:51:53 -0700 (Mon, 05 Jun 2006)
ViewCVS:  http://svn.sourceforge.net/cadcdev/?rev=334&view=rev

Log Message:
-----------
tiki: Add (commented out) support for DC frame rate limiting

Modified Paths:
--------------
    tiki/dc/src/platgl.cpp
Modified: tiki/dc/src/platgl.cpp
===================================================================
--- tiki/dc/src/platgl.cpp	2006-06-06 03:51:23 UTC (rev 333)
+++ tiki/dc/src/platgl.cpp	2006-06-06 03:51:53 UTC (rev 334)
@@ -15,6 +15,11 @@
 
 using namespace Tiki;
 
+static struct timeval lastFrame = { 0,0 };
+static int targetFrameRate = 60;
+static uint64 firstFrame = 0;
+static uint64 frameCnt = 0, totalFrameCnt = 0;
+
 float Tiki::GL::Frame::getFrameRate() {
 	pvr_stats_t stats;
 	pvr_get_stats(&stats);
@@ -22,12 +27,41 @@
 }
 
 void Tiki::GL::Frame::setFrameRateLimit(int rate) {
-	(void)(rate);
+	targetFrameRate = rate;
 }
 
 extern "C" {
 
 void tiki_wait_if_needed() {
+#if 0
+	// Every so often we should reset the frame counters, to avoid
+	// having a super long term averaging effect.
+	if (frameCnt >= 500) {
+		firstFrame = 0;
+		frameCnt = 0;
+	}
+
+	// Update frame counters.
+	if (!firstFrame)
+		firstFrame = Tiki::Time::gettime();
+	frameCnt++;
+	totalFrameCnt++;
+
+	if (lastFrame.tv_sec == 0) {
+		gettimeofday(&lastFrame, NULL);
+		return;
+	}
+
+	struct timeval now;
+	gettimeofday(&now, NULL);
+	long long nowu = ((long long)now.tv_sec) * 1000 * 1000 + now.tv_usec;
+	long long lastu = ((long long)lastFrame.tv_sec) * 1000 * 1000 + lastFrame.tv_usec;
+	long long diffu = nowu - lastu;
+	if (diffu < (1000*1000 / targetFrameRate)) {
+		Time::sleep((1000*1000 / targetFrameRate) - diffu);
+	}
+	gettimeofday(&lastFrame, NULL);
+#endif
 	pvr_wait_ready();
 }
 


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