Extract named_channel.h

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

diff --git a/src/lib/audio_content.h b/src/lib/audio_content.h
index 67183d0a45b517887ea0f4625894f2adaa1dfc33..18f826ee6dbe9751f9a3d96efbbdd7373a20326a 100644 (file)
--- a/src/lib/audio_content.h
+++ b/src/lib/audio_content.h
@@ -28,9 +28,10 @@
 #define DCPOMATIC_AUDIO_CONTENT_H
 
 
-#include "content_part.h"
-#include "audio_stream.h"
 #include "audio_mapping.h"
+#include "audio_stream.h"
+#include "content_part.h"
+#include "named_channel.h"
 
 
 /** @class AudioContentProperty
@@ -42,6 +43,9 @@ public:
        static int const STREAMS;
        static int const GAIN;
        static int const DELAY;
+       static int const FADE_IN;
+       static int const FADE_OUT;
+       static int const USE_SAME_FADES_AS_VIDEO;
 };
 
 
@@ -61,7 +65,9 @@ public:
        int resampled_frame_rate (std::shared_ptr<const Film> film) const;
        std::vector<NamedChannel> channel_names () const;
 
+       /** Set gain in dB */
        void set_gain (double);
+       /** Set delay in milliseconds (positive moves audio later) */
        void set_delay (int);
 
        double gain () const {
@@ -74,6 +80,13 @@ public:
                return _delay;
        }
 
+       dcpomatic::ContentTime fade_in () const;
+       dcpomatic::ContentTime fade_out () const;
+
+       void set_fade_in (dcpomatic::ContentTime time);
+       void set_fade_out (dcpomatic::ContentTime time);
+       void set_use_same_fades_as_video (bool s);
+
        std::string processing_description (std::shared_ptr<const Film> film) const;
 
        std::vector<AudioStreamPtr> streams () const {
@@ -89,7 +102,14 @@ public:
        void add_properties (std::shared_ptr<const Film> film, std::list<UserProperty> &) const;
 
        void modify_position (std::shared_ptr<const Film> film, dcpomatic::DCPTime& pos) const;
-       void modify_trim_start (dcpomatic::ContentTime& pos) const;
+       void modify_trim_start(std::shared_ptr<const Film> film, dcpomatic::ContentTime& pos) const;
+
+       /** @param frame frame within the whole (untrimmed) content.
+        *  @param frame_rate The frame rate of the audio (it may have been resampled).
+        *  @return a fade coefficient for @ref length samples starting at an offset @frame within
+        *  the content, or an empty vector if the given section has no fade.
+        */
+       std::vector<float> fade (AudioStreamPtr stream, Frame frame, Frame length, int frame_rate) const;
 
        static std::shared_ptr<AudioContent> from_xml (Content* parent, cxml::ConstNodePtr, int version);
 
@@ -99,6 +119,9 @@ private:
        double _gain = 0;
        /** Delay to apply to audio (positive moves audio later) in milliseconds */
        int _delay = 0;
+       dcpomatic::ContentTime _fade_in;
+       dcpomatic::ContentTime _fade_out;
+       bool _use_same_fades_as_video = false;
        std::vector<AudioStreamPtr> _streams;
 };