Add basic windowed-sinc audio filters.

[dcpomatic.git] / src / lib / audio_decoder.h

diff --git a/src/lib/audio_decoder.h b/src/lib/audio_decoder.h
index ddfb296c9a9b4fffbf8e2b94928594907566fb68..045efc00207758d01cb56fce7996d685f1a1b458 100644 (file)
--- a/src/lib/audio_decoder.h
+++ b/src/lib/audio_decoder.h
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -26,8 +26,11 @@
 
 #include "decoder.h"
 #include "content.h"
+#include "audio_content.h"
+#include "content_audio.h"
 
 class AudioBuffers;
+class Resampler;
 
 /** @class AudioDecoder.
  *  @brief Parent class for audio decoders.
@@ -35,15 +38,37 @@ class AudioBuffers;
 class AudioDecoder : public virtual Decoder
 {
 public:
-       AudioDecoder (boost::shared_ptr<const Film>);
-
-       /** Emitted when some audio data is ready */
-       boost::signals2::signal<void (boost::shared_ptr<const AudioBuffers>, AudioContent::Frame)> Audio;
+       AudioDecoder (boost::shared_ptr<const AudioContent>);
+       
+       boost::shared_ptr<const AudioContent> audio_content () const {
+               return _audio_content;
+       }
 
+       /** Try to fetch some audio from a specific place in this content.
+        *  @param frame Frame to start from.
+        *  @param length Frames to get.
+        *  @param accurate true to try hard to return frames from exactly `frame', false if we don't mind nearby frames.
+        *  @return Time-stamped audio data which may or may not be from the location (and of the length) requested.
+        */
+       boost::shared_ptr<ContentAudio> get_audio (AudioFrame time, AudioFrame length, bool accurate);
+       
 protected:
 
-       void audio (boost::shared_ptr<const AudioBuffers>, AudioContent::Frame);
-       AudioContent::Frame _audio_position;
+       void seek (ContentTime time, bool accurate);
+       void audio (boost::shared_ptr<const AudioBuffers>, ContentTime);
+       void flush ();
+       void reset_decoded_audio ();
+
+       boost::shared_ptr<const AudioContent> _audio_content;
+       boost::shared_ptr<Resampler> _resampler;
+       boost::shared_ptr<AudioProcessor> _processor;
+       boost::optional<AudioFrame> _audio_position;
+       /** Currently-available decoded audio data */
+       ContentAudio _decoded_audio;
+       /** The time of an accurate seek after which we have not yet received any actual
+           data at the seek time.
+       */
+       boost::optional<ContentTime> _seek_reference;
 };
 
 #endif