From df83c0381e126f17d59039ab8b61789bfe27a79f Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Mon, 2 Oct 2017 20:40:44 +0200
Subject: Prepare support for compression levels (archive + flac)

---
 libs/pbd/file_archive.cc    | 29 +++++++++++++++++++++++++----
 libs/pbd/pbd/file_archive.h | 13 +++++++++++--
 2 files changed, 36 insertions(+), 6 deletions(-)

(limited to 'libs/pbd')

diff --git a/libs/pbd/file_archive.cc b/libs/pbd/file_archive.cc
index 95cdbf61cf..ccc19c0541 100644
--- a/libs/pbd/file_archive.cc
+++ b/libs/pbd/file_archive.cc
@@ -16,6 +16,11 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 
+#ifndef NDEBUG
+#include <iostream>
+#include <iomanip>
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <cstdio>
@@ -337,7 +342,7 @@ FileArchive::do_extract (struct archive* a)
 
 
 int
-FileArchive::create (const std::string& srcdir)
+FileArchive::create (const std::string& srcdir, CompressionLevel compression_level)
 {
 	if (_req.is_remote ()) {
 		return -1;
@@ -357,11 +362,11 @@ FileArchive::create (const std::string& srcdir)
 		filemap[*f] = f->substr (p_len);
 	}
 
-	return create (filemap);
+	return create (filemap, compression_level);
 }
 
 int
-FileArchive::create (const std::map<std::string, std::string>& filemap)
+FileArchive::create (const std::map<std::string, std::string>& filemap, CompressionLevel compression_level)
 {
 	struct archive *a;
 	struct archive_entry *entry;
@@ -385,10 +390,21 @@ FileArchive::create (const std::map<std::string, std::string>& filemap)
 
 	a = archive_write_new ();
 	archive_write_set_format_pax_restricted (a);
-	archive_write_add_filter_lzma (a);
+
+	if (compression_level != CompressNone) {
+		archive_write_add_filter_lzma (a);
+		char buf[48];
+		sprintf (buf, "lzma:compression-level=%u,lzma:threads=0", (uint32_t) compression_level);
+		archive_write_set_options (a, buf);
+	}
+
 	archive_write_open_filename (a, _req.url);
 	entry = archive_entry_new ();
 
+#ifndef NDEBUG
+	  const int64_t archive_start_time = g_get_monotonic_time();
+#endif
+
 	for (std::map<std::string, std::string>::const_iterator f = filemap.begin (); f != filemap.end (); ++f) {
 		char buf[8192];
 		const char* filepath = f->first.c_str ();
@@ -433,5 +449,10 @@ FileArchive::create (const std::map<std::string, std::string>& filemap)
 	archive_write_close (a);
 	archive_write_free (a);
 
+#ifndef NDEBUG
+	const int64_t elapsed_time_us = g_get_monotonic_time() - archive_start_time;
+	std::cerr << "archived in " << std::fixed << std::setprecision (2) << elapsed_time_us / 1000000. << " sec\n";
+#endif
+
 	return 0;
 }
diff --git a/libs/pbd/pbd/file_archive.h b/libs/pbd/pbd/file_archive.h
index 3708f3bbf4..3ef1d93ee0 100644
--- a/libs/pbd/pbd/file_archive.h
+++ b/libs/pbd/pbd/file_archive.h
@@ -38,8 +38,17 @@ class LIBPBD_API FileArchive
 		int inflate (const std::string& destdir);
 		std::vector<std::string> contents ();
 
-		int create (const std::string& srcdir);
-		int create (const std::map <std::string, std::string>& filemap);
+		/* these are mapped to libarchive's lzmaz
+		 * compression level 0..9
+		 */
+		enum CompressionLevel {
+			CompressNone = -1,
+			CompressFast = 0,
+			CompressGood = 6
+		};
+
+		int create (const std::string& srcdir, CompressionLevel compression_level = CompressGood);
+		int create (const std::map <std::string, std::string>& filemap, CompressionLevel compression_level = CompressGood);
 
 		PBD::Signal2<void, size_t, size_t> progress; // TODO
 
-- 
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