rework peakfile handling:

- copy old peak-files to new (do not require re-calc)
- keep old peak-files (for now, backwards compat)
- fix cleanup-sources to remove *new* peak-file
- include channel-number in hash (like it was done before)

see also 624f76b

TODO: add Session > Cleanup > remove/re-create peaks

libs/ardour/ardour/audio_playlist_source.h

@@ -37,7 +37,7 @@ public:
 	virtual ~AudioPlaylistSource ();
 
 	bool empty() const;
-	std::string construct_peak_filepath (const std::string& audio_path) const;
+	std::string construct_peak_filepath (const std::string& audio_path, bool oldformat = false) const;
 	uint32_t   n_channels() const;
 	bool clamped_at_unity () const { return false; }
 

libs/ardour/ardour/audiofilesource.h

@@ -39,7 +39,7 @@ class LIBARDOUR_API AudioFileSource : public AudioSource, public FileSource {
 public:
 	virtual ~AudioFileSource ();
 
-	std::string construct_peak_filepath (const std::string& audio_filepath) const;
+	std::string construct_peak_filepath (const std::string& audio_filepath, bool oldformat = false) const;
 
 	static void set_peak_dir (const std::string& dir) { peak_dir = dir; }
 

libs/ardour/ardour/audiosource.h

@@ -136,7 +136,7 @@ class LIBARDOUR_API AudioSource : virtual public Source,
 
 	virtual framecnt_t read_unlocked (Sample *dst, framepos_t start, framecnt_t cnt) const = 0;
 	virtual framecnt_t write_unlocked (Sample *dst, framecnt_t cnt) = 0;
-	virtual std::string construct_peak_filepath(const std::string& audio_filepath) const = 0;
+	virtual std::string construct_peak_filepath(const std::string& audio_filepath, bool oldformat = false) const = 0;
 
 	virtual int read_peaks_with_fpp (PeakData *peaks,
 					 framecnt_t npeaks, framepos_t start, framecnt_t cnt,

libs/ardour/ardour/session.h

@@ -210,7 +210,7 @@ class LIBARDOUR_API Session : public PBD::StatefulDestructible, public PBD::Scop
 	std::string plugins_dir () const;     ///< Plugin state
 	std::string externals_dir () const;   ///< Links to external files
 
-	std::string construct_peak_filepath (const std::string&) const;
+	std::string construct_peak_filepath (const std::string&, bool oldformat = false) const;
 
 	bool audio_source_name_is_unique (const std::string& name);
 	std::string format_audio_source_name (const std::string& legalized_base, uint32_t nchan, uint32_t chan, bool destructive, bool take_required, uint32_t cnt, bool related_exists);

libs/ardour/audio_playlist_source.cc

@@ -217,7 +217,7 @@ AudioPlaylistSource::setup_peakfile ()
 }
 
 string
-AudioPlaylistSource::construct_peak_filepath (const string& /*audio_path_IGNORED*/) const
+AudioPlaylistSource::construct_peak_filepath (const string& /*audio_path_IGNORED*/, bool /* oldformat IGNORED*/) const
 {
 	return _peak_path;
 }

libs/ardour/audiofilesource.cc

@@ -164,9 +164,17 @@ AudioFileSource::init (const string& pathstr, bool must_exist)
 }
 
 string
-AudioFileSource::construct_peak_filepath (const string& audio_path) const
+AudioFileSource::construct_peak_filepath (const string& audio_path, bool oldformat) const
 {
-	return _session.construct_peak_filepath (audio_path);
+	string base;
+	if (oldformat) {
+		base = audio_path.substr (0, audio_path.find_last_of ('.'));
+	} else {
+		base = audio_path;
+	}
+	base += '%';
+	base += (char) ('A' + _channel);
+	return _session.construct_peak_filepath (base, oldformat);
 }
 
 bool

libs/ardour/audiosource.cc

@@ -50,6 +50,7 @@
 #include <glibmm/fileutils.h>
 #include <glibmm/miscutils.h>
 
+#include "pbd/file_utils.h"
 #include "pbd/scoped_file_descriptor.h"
 #include "pbd/xml++.h"
 
@@ -242,6 +243,16 @@ AudioSource::initialize_peakfile (const string& audio_path)
 
 	_peakpath = construct_peak_filepath (audio_path);
 
+	if (!empty() && !Glib::file_test (_peakpath.c_str(), Glib::FILE_TEST_EXISTS)) {
+		string oldpeak = construct_peak_filepath (audio_path, true);
+		DEBUG_TRACE(DEBUG::Peaks, string_compose ("Looking for old peak file %1 for Audio file %2\n", oldpeak, audio_path));
+		if (Glib::file_test (oldpeak.c_str(), Glib::FILE_TEST_EXISTS)) {
+			// TODO use hard-link if possible
+			DEBUG_TRACE(DEBUG::Peaks, string_compose ("Copy old peakfile %1 to %2\n", oldpeak, _peakpath));
+			PBD::copy_file (oldpeak, _peakpath);
+		}
+	}
+
 	DEBUG_TRACE(DEBUG::Peaks, string_compose ("Initialize Peakfile %1 for Audio file %2\n", _peakpath, audio_path));
 
 	if (g_stat (_peakpath.c_str(), &statbuf)) {

libs/ardour/session.cc

@@ -4363,8 +4363,18 @@ Session::count_sources_by_origin (const string& path)
 	return cnt;
 }
 
+static string
+peak_file_helper (const string& peak_path, const string& file_path, const string& file_base, bool hash) {
+	if (hash) {
+		std::string checksum = Glib::Checksum::compute_checksum(Glib::Checksum::CHECKSUM_SHA1, file_path + G_DIR_SEPARATOR + file_base);
+		return Glib::build_filename (peak_path, checksum + peakfile_suffix);
+	} else {
+		return Glib::build_filename (peak_path, file_base + peakfile_suffix);
+	}
+}
+
 string
-Session::construct_peak_filepath (const string& filepath) const
+Session::construct_peak_filepath (const string& filepath, bool oldformat) const
 {
 	string interchange_dir_string = string (interchange_dir_name) + G_DIR_SEPARATOR;
 
@@ -4397,24 +4407,25 @@ Session::construct_peak_filepath (const string& filepath) const
 
 		if (in_another_session) {
 			SessionDirectory sd (session_path);
-			return Glib::build_filename (sd.peak_path(), Glib::path_get_basename (filepath) + peakfile_suffix);
+			return peak_file_helper (sd.peak_path(), "", Glib::path_get_basename (filepath), !oldformat);
 		}
 	}
 
+	/* 1) if file belongs to this session
+	 * it may be a relative path (interchange/...)
+	 * or just basename (session_state, remove source)
+	 * -> just use the basename
+	 */
 	std::string filename = Glib::path_get_basename (filepath);
 	std::string path;
-	/* file is within our session: just use the filename for checksumming and leave path empty */
 
+	/* 2) if the file is outside our session dir:
+	 * (imported but not copied) add the path for check-summming */
 	if (filepath.find (interchange_dir_string) == string::npos) {
-		/* the file is outside our session: add the filepath for checksummming */
 		path = Glib::path_get_dirname (filepath);
 	}
 	
-	string::size_type suffix = filename.find_last_of ('.');
+	return peak_file_helper (_session_dir->peak_path(), path, Glib::path_get_basename (filepath), !oldformat);
-
-	std::string checksum = Glib::Checksum::compute_checksum(Glib::Checksum::CHECKSUM_SHA1, path + G_DIR_SEPARATOR + filename);
-
-	return Glib::build_filename (_session_dir->peak_path(), checksum + peakfile_suffix);
 }
 
 string

libs/ardour/session_state.cc

@@ -3047,7 +3047,7 @@ Session::cleanup_sources (CleanupReport& rep)
 		/* see if there an easy to find peakfile for this file, and remove it.
 		 */
 
-                string base = basename_nosuffix (*x);
+                string base = Glib::path_get_basename (*x);
                 base += "%A"; /* this is what we add for the channel suffix of all native files,
                                  or for the first channel of embedded files. it will miss
                                  some peakfiles for other channels