Minor docs change, and addition to AudioThumbnail.

modules/juce_audio_processors/processors/juce_AudioPlayHead.h

@@ -133,6 +133,9 @@ public:
     //==============================================================================
     /** Fills-in the given structure with details about the transport's
         position at the start of the current processing block.
+
+        This method must ONLY be called from within your AudioProcessor::processBlock()
+        method. Calling it at any other time will probably cause a nasty crash.
     */
     virtual bool getCurrentPosition (CurrentPositionInfo& result) = 0;
 };

modules/juce_audio_utils/gui/juce_AudioThumbnail.cpp

@@ -740,6 +740,11 @@ bool AudioThumbnail::isFullyLoaded() const noexcept
     return numSamplesFinished >= totalSamples - samplesPerThumbSample;
 }
 
+double AudioThumbnail::getProportionComplete() const noexcept
+{
+    return jlimit (0.0, 1.0, numSamplesFinished / (double) totalSamples);
+}
+
 int64 AudioThumbnail::getNumSamplesFinished() const noexcept
 {
     return numSamplesFinished;

modules/juce_audio_utils/gui/juce_AudioThumbnail.h

@@ -168,6 +168,9 @@ public:
     /** Returns true if the low res preview is fully generated. */
     bool isFullyLoaded() const noexcept;
 
+    /** Returns a value between 0 and 1 to indicate the progress towards loading the entire file. */
+    double getProportionComplete() const noexcept;
+
     /** Returns the number of samples that have been set in the thumbnail. */
     int64 getNumSamplesFinished() const noexcept;