make resampled sources (during import) report their "natural position" (i.e. BWF timecode) using the samplerate of the session, not the original source, for correct positioning; minor frame{pos,cnt}_t cleanup

git-svn-id: svn://localhost/ardour2/branches/3.0@7785 d708f5d6-7413-0410-9779-e7cbd77b26cf

6 files changed, 36 insertions, 27 deletions

diff --git a/libs/ardour/ardour/importable_source.h b/libs/ardour/ardour/importable_source.h
index 7df346a782..c610d546f2 100644
--- a/libs/ardour/ardour/importable_source.h
+++ b/libs/ardour/ardour/importable_source.h
@@ -30,13 +30,13 @@ public:
 	ImportableSource () {}
 	virtual ~ImportableSource() {}
 
-	virtual nframes_t read (Sample* buffer, nframes_t nframes) = 0;
-	virtual float ratio() const { return 1.0f; }
-	virtual uint32_t channels() const = 0;
-	virtual nframes_t length() const = 0;
-	virtual nframes_t samplerate() const = 0;
-	virtual void      seek (nframes_t pos) = 0;
-	virtual nframes64_t natural_position() const = 0;
+	virtual nframes_t  read (Sample* buffer, nframes_t nframes) = 0;
+	virtual float      ratio() const { return 1.0f; }
+	virtual uint32_t   channels() const = 0;
+	virtual framecnt_t length() const = 0;
+	virtual nframes_t  samplerate() const = 0;
+	virtual void       seek (nframes_t pos) = 0;
+	virtual framepos_t natural_position() const = 0;
 
 	virtual bool clamped_at_unity () const = 0;
 };
diff --git a/libs/ardour/ardour/resampled_source.h b/libs/ardour/ardour/resampled_source.h
index b61303b65c..6d630bc44b 100644
--- a/libs/ardour/ardour/resampled_source.h
+++ b/libs/ardour/ardour/resampled_source.h
@@ -34,13 +34,13 @@ class ResampledImportableSource : public ImportableSource
 
 	~ResampledImportableSource ();
 
-	nframes_t read (Sample* buffer, nframes_t nframes);
-	float ratio() const { return src_data.src_ratio; }
-	uint32_t channels() const { return source->channels(); }
-	nframes_t length() const { return source->length(); }
-	nframes_t samplerate() const { return source->samplerate(); }
-	void      seek (nframes_t);
-	nframes64_t natural_position() const { return source->natural_position(); }
+	nframes_t  read (Sample* buffer, nframes_t nframes);
+	float      ratio() const { return src_data.src_ratio; }
+	uint32_t   channels() const { return source->channels(); }
+	framecnt_t length() const { return source->length(); }
+	nframes_t  samplerate() const { return source->samplerate(); }
+	void       seek (nframes_t);
+	framepos_t natural_position() const;
 
 	bool clamped_at_unity () const {
 		/* resampling may generate inter-sample peaks with magnitude > 1 */
diff --git a/libs/ardour/ardour/sndfileimportable.h b/libs/ardour/ardour/sndfileimportable.h
index 6e308415c9..aab8b6ac59 100644
--- a/libs/ardour/ardour/sndfileimportable.h
+++ b/libs/ardour/ardour/sndfileimportable.h
@@ -33,18 +33,23 @@ class SndFileImportableSource : public ImportableSource {
 	SndFileImportableSource (const std::string& path);
 	virtual ~SndFileImportableSource();
 
-	nframes_t read (Sample* buffer, nframes_t nframes);
-	uint32_t  channels() const;
-	nframes_t length() const;
-	nframes_t samplerate() const;
-	void      seek (nframes_t pos);
-	nframes64_t natural_position() const;
-	bool clamped_at_unity () const;
+	nframes_t  read (Sample* buffer, nframes_t nframes);
+	uint32_t   channels() const;
+	framecnt_t length() const;
+	nframes_t  samplerate() const;
+	void       seek (nframes_t pos);
+	framepos_t natural_position() const;
+	bool       clamped_at_unity () const;
 
    protected:
 	SF_INFO sf_info;
 	boost::shared_ptr<SNDFILE> in;
-	nframes_t timecode;
+        
+        /* these are int64_t so as to be independent of whatever
+           types Ardour may use for framepos_t, framecnt_t etc.
+        */
+
+	int64_t timecode;
 	int64_t get_timecode_info (SNDFILE*, SF_BROADCAST_INFO*, bool&);
 };
 
diff --git a/libs/ardour/import.cc b/libs/ardour/import.cc
index 784fedefdb..13fb859efe 100644
--- a/libs/ardour/import.cc
+++ b/libs/ardour/import.cc
@@ -214,7 +214,6 @@ create_mono_sources_for_writing (const vector<string>& new_paths, Session& sess,
 		{
 			const DataType type = SMFSource::safe_midi_file_extension (*i) ? DataType::MIDI : DataType::AUDIO;
 
-
 			source = SourceFactory::createWritable (type, sess,
 					i->c_str(),
 					false, // destructive
diff --git a/libs/ardour/resampled_source.cc b/libs/ardour/resampled_source.cc
index 675a0e426d..7379aa74af 100644
--- a/libs/ardour/resampled_source.cc
+++ b/libs/ardour/resampled_source.cc
@@ -134,3 +134,8 @@ ResampledImportableSource::seek (nframes_t pos)
 	src_data.end_of_input = 0;
 }
 	
+framepos_t
+ResampledImportableSource::natural_position () const
+{
+        return source->natural_position() * ratio ();
+}
diff --git a/libs/ardour/sndfileimportable.cc b/libs/ardour/sndfileimportable.cc
index 99697b888f..b51ad3634a 100644
--- a/libs/ardour/sndfileimportable.cc
+++ b/libs/ardour/sndfileimportable.cc
@@ -57,10 +57,10 @@ SndFileImportableSource::channels () const
 	return sf_info.channels;
 }
 
-nframes_t
+framecnt_t
 SndFileImportableSource::length () const
 {
-	return sf_info.frames;
+	return (framecnt_t) sf_info.frames;
 }
 
 nframes_t
@@ -75,10 +75,10 @@ SndFileImportableSource::seek (nframes_t /*pos*/)
 	sf_seek (in.get(), 0, SEEK_SET);
 }
 
-nframes64_t
+framepos_t
 SndFileImportableSource::natural_position () const
 {
-	return timecode;
+	return (framepos_t) timecode;
 }
 
 bool