Handle multiple audio streams in a single piece of content

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

diff --git a/src/lib/audio_decoder.h b/src/lib/audio_decoder.h
index c83c356b7488c157dc85a6cd589dc7f256d029d5..1b17029b7e4b2889d85e72861802b6e6c9097bac 100644 (file)
--- a/src/lib/audio_decoder.h
+++ b/src/lib/audio_decoder.h
@@ -28,14 +28,15 @@
 #include "content.h"
 #include "audio_content.h"
 #include "content_audio.h"
+#include <boost/enable_shared_from_this.hpp>
 
 class AudioBuffers;
-class Resampler;
+class AudioDecoderStream;
 
 /** @class AudioDecoder.
  *  @brief Parent class for audio decoders.
  */
-class AudioDecoder : public virtual Decoder
+class AudioDecoder : public virtual Decoder, public boost::enable_shared_from_this<AudioDecoder>
 {
 public:
        AudioDecoder (boost::shared_ptr<const AudioContent>);
@@ -45,24 +46,22 @@ public:
        }
 
        /** Try to fetch some audio from a specific place in this content.
-        *  @param frame Frame to start from.
-        *  @param length Frames to get.
+        *  @param frame Frame to start from (after resampling, if applicable)
+        *  @param length Frames to get (after resampling, if applicable)
         *  @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:
+       ContentAudio get_audio (AudioStreamPtr stream, Frame time, Frame length, bool accurate);
 
-       void seek (ContentTime time, bool accurate);
-       void audio (boost::shared_ptr<const AudioBuffers>, ContentTime);
+protected:
+       void audio (AudioStreamPtr stream, boost::shared_ptr<const AudioBuffers>, ContentTime);
        void flush ();
-
+       void seek (ContentTime t, bool accurate);
+       
+private:       
        boost::shared_ptr<const AudioContent> _audio_content;
-       boost::shared_ptr<Resampler> _resampler;
-       boost::optional<AudioFrame> _audio_position;
-       /** Currently-available decoded audio data */
-       ContentAudio _decoded_audio;
+       /** An AudioDecoderStream object to manage each stream in _audio_content */
+       std::map<AudioStreamPtr, boost::shared_ptr<AudioDecoderStream> > _streams;
 };
 
 #endif