Add Mixer::getElapsedTime() method returning a Timestamp, thus offering a higher precision than Mixer::getSoundElapsedTime(). Convert some video code to use it.

svn-id: r47213

2 files changed, 8 insertions, 4 deletions

diff --git a/graphics/video/avi_decoder.cpp b/graphics/video/avi_decoder.cpp
index 7416d86310..f54de46731 100644
--- a/graphics/video/avi_decoder.cpp
+++ b/graphics/video/avi_decoder.cpp
@@ -412,8 +412,10 @@ int32 AviDecoder::getAudioLag() {
 		*/
 
 		audioTime = (g_system->getMillis() - _videoInfo.startTime) * 100;
-	} else
-		audioTime = (((int32)_mixer->getSoundElapsedTime(*_audHandle)) * 100);
+	} else {
+		const Audio::Timestamp ts = _mixer->getElapsedTime(*_audHandle);
+		audioTime = ts.convertToFramerate(100000).totalNumberOfFrames();
+	}
 
 	return videoTime - audioTime;
 }
diff --git a/graphics/video/smk_decoder.cpp b/graphics/video/smk_decoder.cpp
index 1a313b9f2e..a3b056b6a3 100644
--- a/graphics/video/smk_decoder.cpp
+++ b/graphics/video/smk_decoder.cpp
@@ -377,8 +377,10 @@ int32 SmackerDecoder::getAudioLag() {
 		*/
 
 		audioTime = (g_system->getMillis() - _videoInfo.startTime) * 100;
-	} else
-		audioTime = (((int32) _mixer->getSoundElapsedTime(_audioHandle)) * 100);
+	} else {
+		const Audio::Timestamp ts = _mixer->getElapsedTime(_audioHandle);
+		audioTime = ts.convertToFramerate(100000).totalNumberOfFrames();
+	}
 
 	return videoTime - audioTime;
 }