mediaframe: add const pointer method

Change-Id: Ifeaf66cf06d8859be25642064ce09761a1552894
Reviewed-by: Philippe Gorley <philippe.gorley@savoirfairelinux.com>

src/dring/videomanager_interface.h

@@ -80,7 +80,8 @@ public:
     virtual ~MediaFrame() = default;
 
     // Return a pointer on underlaying buffer
-    AVFrame* pointer() const noexcept { return frame_.get(); }
+    const AVFrame* pointer() const noexcept { return frame_.get(); }
+    AVFrame* pointer() noexcept { return frame_.get(); }
 
     // Fill this MediaFrame with data from o
     void copyFrom(const MediaFrame& o);

src/media/media_decoder.cpp

@@ -310,7 +310,7 @@ MediaDecoder::decode(VideoFrame& result)
 #endif // RING_VIDEO
 
 MediaDecoder::Status
-MediaDecoder::decode(const AudioFrame& decodedFrame)
+MediaDecoder::decode(AudioFrame& decodedFrame)
 {
     const auto frame = decodedFrame.pointer();
 

src/media/media_decoder.h

@@ -89,7 +89,7 @@ class MediaDecoder {
  #endif // RING_VIDEO
 
         int setupFromAudioData();
-        Status decode(const AudioFrame&);
+        Status decode(AudioFrame&);
         void writeToRingBuffer(const AudioFrame&, RingBuffer&, const AudioFormat);
 
         int getWidth() const;