Prepare for windows video support on all drive-letters.

* add harvid version detection (>= 0.8.2 is needed)
* special case empty docroot (for windows, pass drive-letter)

gtk2_ardour/ardour_ui.cc

@@ -174,6 +174,7 @@ typedef uint64_t microseconds_t;
 #include "time_info_box.h"
 #include "timers.h"
 #include "utils.h"
+#include "utils_videotl.h"
 #include "video_server_dialog.h"
 #include "add_video_dialog.h"
 #include "transcode_video_dialog.h"
@@ -4379,15 +4380,18 @@ ARDOUR_UI::start_video_server (Gtk::Window* float_window, bool popup_msg)
 
 		std::string icsd_exec = video_server_dialog->get_exec_path();
 		std::string icsd_docroot = video_server_dialog->get_docroot();
-		if (icsd_docroot.empty()) {
 #ifndef PLATFORM_WINDOWS
-			icsd_docroot = X_("/");
-#else
-			icsd_docroot = X_("C:\\");
-#endif
+		if (icsd_docroot.empty()) {
+			icsd_docroot = VideoUtils::video_get_docroot (Config);
 		}
+#endif
 
 		GStatBuf sb;
+#ifdef PLATFORM_WINDOWS
+		if (VideoUtils::harvid_version >= 0x000802 && icsd_docroot.empty()) {
+			/* OK, allow all drive letters */
+		} else
+#endif
 		if (g_lstat (icsd_docroot.c_str(), &sb) != 0 || !S_ISDIR(sb.st_mode)) {
 			warning << _("Specified docroot is not an existing directory.") << endmsg;
 			continue;

gtk2_ardour/utils_videotl.cc

@@ -47,6 +47,8 @@ using namespace PBD;
 using namespace ARDOUR;
 using namespace VideoUtils;
 
+unsigned int VideoUtils::harvid_version = 0x0;
+
 bool
 VideoUtils::confirm_video_outfn (Gtk::Window& parent, std::string outfn, std::string docroot)
 {
@@ -111,7 +113,11 @@ VideoUtils::video_get_docroot (ARDOUR::RCConfiguration* config)
 #ifndef PLATFORM_WINDOWS
 	return X_("/");
 #else
-	return X_("C:\\");
+	if (harvid_version >= 0x000802) { // 0.8.2
+		return X_("");
+	} else {
+		return X_("C:\\");
+	}
 #endif
 }
 

gtk2_ardour/utils_videotl.h

@@ -34,6 +34,8 @@
 
 namespace VideoUtils {
 
+extern unsigned int harvid_version;
+
 bool confirm_video_outfn (Gtk::Window& parent, std::string, std::string docroot="");
 std::string video_dest_dir (const std::string, const std::string);
 std::string video_dest_file (const std::string, const std::string);

gtk2_ardour/video_server_dialog.cc

@@ -101,6 +101,11 @@ VideoServerDialog::VideoServerDialog (Session* s)
 			<< endmsg;
 	}
 
+#ifdef PLATFORM_WINDOWS
+	if (VideoUtils::harvid_version >= 0x000802) {
+		/* empty docroot -> all drive letters */
+	} else
+#endif
 	if (docroot_entry.get_text().empty()) {
 	  std::string docroot =  Glib::path_get_dirname(_session->session_directory().root_path());
 	  if ((docroot.empty() || docroot.at(docroot.length()-1) != '/')) { docroot += "/"; }

gtk2_ardour/video_timeline.cc

@@ -68,6 +68,7 @@ VideoTimeLine::VideoTimeLine (PublicEditor *ed, ArdourCanvas::Container *vbg, in
 	vmonitor=0;
 	reopen_vmonitor=false;
 	find_xjadeo();
+	find_harvid();
 
 	VtlUpdate.connect (*this, invalidator (*this), boost::bind (&PublicEditor::queue_visual_videotimeline_update, editor), gui_context());
 	GuiUpdate.connect (*this, invalidator (*this), boost::bind (&VideoTimeLine::gui_update, this, _1), gui_context());
@@ -780,6 +781,61 @@ VideoTimeLine::find_xjadeo () {
 	}
 }
 
+void
+VideoTimeLine::harvid_readversion (std::string d, size_t /* s */) {
+	harvid_version += d;
+}
+
+void
+VideoTimeLine::find_harvid () {
+	/* This is mainly for the benefit of the windows version:
+	 * harvid >= 0.8.2 allows an empty docroot and ardour can
+	 * pass the drive-letter along.
+	 *
+	 * It is a chicken/egg w.r.t. the video-server dialog
+	 * but needed for default preferences and initial settings.
+	 */
+	std::string harvid_bin;
+	if (VideoUtils::harvid_version != 0x0) {
+		return;
+	}
+	if (!ArdourVideoToolPaths::harvid_exe(harvid_bin)) {
+		return;
+	}
+	if (harvid_bin.empty ()) {
+		return;
+	}
+	ARDOUR::SystemExec version_check(harvid_bin, X_("--version"));
+	harvid_version = "";
+	version_check.ReadStdout.connect_same_thread (*this, boost::bind (&VideoTimeLine::harvid_readversion, this, _1 ,_2));
+	version_check.Terminated.connect_same_thread (*this, boost::bind (&VideoTimeLine::harvid_readversion, this, "\n" ,1));
+	if (version_check.start(2)) {
+		return;
+	}
+
+#ifdef PLATFORM_WINDOWS
+	version_check.wait (); // 40ms timeout
+#else
+	version_check.wait (WNOHANG);
+#endif
+
+	int timeout = 300;
+	while (harvid_version.empty() && --timeout) {
+		Glib::usleep(10000);
+	}
+
+	size_t vo = harvid_version.find("harvid v");
+	if (vo != string::npos) {
+		int v_major, v_minor, v_micro;
+		if(sscanf(harvid_version.substr(vo + 8, string::npos).c_str(),"%d.%d.%d",
+					&v_major, &v_minor, &v_micro) == 3)
+		{
+			VideoUtils::harvid_version = (v_major << 16) | (v_minor << 8) | v_micro;
+			info << "harvid version: "<< hex << VideoUtils::harvid_version << endmsg;
+		}
+	}
+}
+
 void
 VideoTimeLine::open_video_monitor() {
 	if (!found_xjadeo()) return;

gtk2_ardour/video_timeline.h

@@ -107,6 +107,7 @@ class VideoTimeLine : public sigc::trackable, public ARDOUR::SessionHandlePtr, p
 
 	std::string _xjadeo_bin;
 	void find_xjadeo ();
+	void find_harvid ();
 
 
 	ARDOUR::frameoffset_t video_start_offset; /**< unit: audio-samples - video-file */
@@ -124,7 +125,9 @@ class VideoTimeLine : public sigc::trackable, public ARDOUR::SessionHandlePtr, p
 	std::string server_docroot;
 
 	void xjadeo_readversion (std::string d, size_t s);
+	void harvid_readversion (std::string d, size_t s);
 	std::string xjadeo_version;
+	std::string harvid_version;
 
 	typedef std::list<VideoImageFrame*> VideoFrames;
 	VideoFrames video_frames;