--- /dev/null
+// Copyright 2005-6 Ben Hutchings <ben@decadentplace.org.uk>.
+// See the file "COPYING" for licence details.
+
+#include <fstream>
+#include <stdexcept>
+
+#include <glibmm/spawn.h>
+
+#include "dvd.hpp"
+#include "generate_dvd.hpp"
+
+dvd_contents::menu::menu()
+ : vob_temp(new temp_file("webdvd-vob-"))
+{
+ vob_temp->close();
+}
+
+void generate_dvd(const dvd_contents & contents,
+ const std::string & output_dir)
+{
+ temp_file temp("webdvd-dvdauthor-");
+ temp.close();
+ std::ofstream file(temp.get_name().c_str());
+
+ // We generate code that uses registers in the following way:
+ //
+ // g0: scratch
+ // g1: current location
+ // g12: location that last jumped to a video
+ //
+ // All locations are divided into two bitfields: the least
+ // significant 10 bits are a page/menu number and the most
+ // significant 6 bits are a link/button number, and numbering
+ // starts at 1, not 0. This is done for compatibility with
+ // the encoding of the s8 (button) register.
+ //
+ static const int button_mult = dvd::reg_s8_button_mult;
+ static const int menu_mask = button_mult - 1;
+ static const int button_mask = (1 << dvd::reg_bits) - button_mult;
+
+ file <<
+ "<dvdauthor>\n"
+ " <vmgm>\n"
+ " <menus>\n";
+
+ for (unsigned menu_num = 0;
+ menu_num != contents.menus.size();
+ ++menu_num)
+ {
+ const dvd_contents::menu & menu = contents.menus[menu_num];
+
+ if (menu_num == 0)
+ {
+ // This is the first (title) menu, displayed when the
+ // disc is first played.
+ file <<
+ " <pgc entry='title'>\n"
+ " <pre>\n"
+ // Initialise the current location if it is not set
+ // (all general registers are initially 0).
+ " if (g1 eq 0)\n"
+ " g1 = " << 1 + button_mult << ";\n";
+ }
+ else
+ {
+ file <<
+ " <pgc>\n"
+ " <pre>\n";
+ }
+
+ // When a title finishes or the user presses the menu
+ // button, this always jumps to the titleset's root menu.
+ // We want to return the user to the last menu they used.
+ // So we arrange for each titleset's root menu to return
+ // to the vmgm title menu and then dispatch from there to
+ // whatever the correct menu is. We determine the correct
+ // menu by looking at the menu part of g1.
+
+ file << " g0 = g1 & " << menu_mask << ";\n";
+
+ // There is a limit of 128 VM instructions in each PGC.
+ // Therefore in each menu's <pre> section we generate
+ // jumps to menus with numbers greater by 512, 256, 128,
+ // ..., 1 where (a) such a menu exists, (b) this menu
+ // number is divisible by twice that increment and (c) the
+ // correct menu is that or a later menu. Thus each menu
+ // has at most 10 such conditional jumps and is reachable
+ // by at most 10 jumps from the title menu. This chain of
+ // jumps might take too long on some players; this has yet
+ // to be investigated.
+
+ for (std::size_t menu_incr = (menu_mask + 1) / 2;
+ menu_incr != 0;
+ menu_incr /= 2)
+ {
+ if (menu_num + menu_incr < contents.menus.size()
+ && (menu_num & (menu_incr * 2 - 1)) == 0)
+ {
+ file <<
+ " if (g0 ge " << 1 + menu_num + menu_incr
+ << ")\n"
+ " jump menu " << 1 + menu_num + menu_incr
+ << ";\n";
+ }
+ }
+
+ file <<
+ // Highlight the appropriate button.
+ " s8 = g1 & " << button_mask << ";\n"
+ " </pre>\n"
+ " <vob file='" << menu.vob_temp->get_name() << "'/>\n";
+
+ for (unsigned button_num = 0;
+ button_num != menu.entries.size();
+ ++button_num)
+ {
+ const dvd_contents::pgc_ref & target =
+ menu.entries[button_num];
+
+ file << " <button> ";
+
+ if (target.type == dvd_contents::menu_pgc)
+ {
+ unsigned target_button_num;
+
+ if (target.sub_index)
+ {
+ target_button_num = target.sub_index;
+ }
+ else
+ {
+ // Look for a button on the new menu that links
+ // back to this one. If there is one, set that to
+ // be the highlighted button; otherwise, use the
+ // first button.
+ const std::vector<dvd_contents::pgc_ref> &
+ target_menu_entries =
+ contents.menus[target.index].entries;
+ dvd_contents::pgc_ref this_pgc(dvd_contents::menu_pgc,
+ menu_num);
+ target_button_num = target_menu_entries.size();
+ while (target_button_num != 0
+ && (target_menu_entries[--target_button_num]
+ != this_pgc))
+ ;
+ target_button_num += 1;
+ }
+
+ file << "g1 = "
+ << (1 + target.index
+ + target_button_num * button_mult)
+ << "; jump menu " << 1 + target.index << ";";
+ }
+ else
+ {
+ assert(target.type == dvd_contents::title_pgc);
+
+ file << "g1 = "
+ << 1 + menu_num + (1 + button_num) * button_mult
+ << "; jump title "
+ << 1 + target.index;
+ if (target.sub_index)
+ file << " chapter " << target.sub_index;
+ file << ";";
+ }
+
+ file << " </button>\n";
+ }
+
+ file << " </pgc>\n";
+ }
+
+ file <<
+ " </menus>\n"
+ " </vmgm>\n";
+
+ // Generate a titleset for each title. This appears to make
+ // jumping to titles a whole lot simpler (but limits us to 99
+ // titles).
+ for (unsigned title_num = 0;
+ title_num != contents.titles.size();
+ ++title_num)
+ {
+ file <<
+ " <titleset>\n"
+ // Generate a dummy menu so that the menu button on the
+ // remote control will work.
+ " <menus>\n"
+ " <pgc entry='root'>\n"
+ " <pre> jump vmgm menu; </pre>\n"
+ " </pgc>\n"
+ " </menus>\n"
+ " <titles>\n"
+ " <pgc>\n"
+ // Record calling location.
+ " <pre> g12 = g1; </pre>\n"
+ << contents.titles[title_num].vob_list <<
+ // If the menu location has not been changed during
+ // the title, set the location to be the following
+ // button in the menu. In any case, return to some
+ // menu.
+ " <post> if (g1 eq g12) g1 = g1 + " << button_mult
+ << "; call menu; </post>\n"
+ " </pgc>\n"
+ " </titles>\n"
+ " </titleset>\n";
+ }
+
+ file <<
+ "</dvdauthor>\n";
+
+ file.close();
+
+ {
+ const char * argv[] = {
+ "dvdauthor",
+ "-o", output_dir.c_str(),
+ "-x", temp.get_name().c_str(),
+ 0
+ };
+ int command_result;
+ Glib::spawn_sync(".",
+ Glib::ArrayHandle<std::string>(
+ argv, sizeof(argv)/sizeof(argv[0]),
+ Glib::OWNERSHIP_NONE),
+ Glib::SPAWN_SEARCH_PATH
+ | Glib::SPAWN_STDOUT_TO_DEV_NULL,
+ SigC::Slot0<void>(),
+ 0, 0,
+ &command_result);
+ if (command_result != 0)
+ throw std::runtime_error("dvdauthor failed");
+ }
+}
--- /dev/null
+// Copyright 2005-6 Ben Hutchings <ben@decadentplace.org.uk>.
+// See the file "COPYING" for licence details.
+
+#ifndef INC_GENERATE_DVD_HPP
+#define INC_GENERATE_DVD_HPP
+
+#include <string>
+#include <vector>
+
+#include <boost/shared_ptr.hpp>
+
+#include "temp_file.hpp"
+
+// Description of menus and titles to go on a DVD.
+
+struct dvd_contents
+{
+ enum pgc_type { unknown_pgc, menu_pgc, title_pgc };
+
+ // Reference to some PGC (program chain).
+ struct pgc_ref
+ {
+ explicit pgc_ref(pgc_type type = unknown_pgc,
+ int index = -1,
+ int sub_index = 0)
+ : type(type), index(index), sub_index(sub_index)
+ {}
+ bool operator==(const pgc_ref & other) const
+ {
+ return type == other.type && index == other.index;
+ }
+ bool operator!=(const pgc_ref & other) const
+ {
+ return !(*this == other);
+ }
+
+ pgc_type type; // Menu or title reference?
+ unsigned index; // Menu or title index (within resp. vector)
+ unsigned sub_index; // Button or chapter number (1-based; 0 if
+ // unspecified; not compared!)
+ };
+
+ // Menu definition.
+ struct menu
+ {
+ menu();
+
+ // Temporary file in which the menu VOB should be generated.
+ // This is created as an empty file and then closed.
+ boost::shared_ptr<temp_file> vob_temp;
+
+ // References to the menus and titles that the menu buttons
+ // are meant to link to, in the same order as the buttons.
+ std::vector<pgc_ref> entries;
+ };
+
+ // Title definition. This is currently just an XML fragment
+ // consisting of one of more <vob> elements. It is included
+ // directly within the corresponding <pgc> element in the file
+ // passed to dvdauthor.
+ struct title
+ {
+ explicit title(const std::string & vob_list)
+ : vob_list(vob_list)
+ {}
+
+ std::string vob_list;
+ };
+
+ std::vector<menu> menus;
+ std::vector<title> titles;
+};
+
+// Use dvdauthor to generate a DVD filesystem with the given contents.
+void generate_dvd(const dvd_contents & contents,
+ const std::string & output_dir);
+
+#endif // !INC_GENERATE_DVD_HPP
#include "browser_widget.hpp"
#include "child_iterator.hpp"
#include "dvd.hpp"
+#include "generate_dvd.hpp"
#include "link_iterator.hpp"
#include "pixbufs.hpp"
#include "style_sheets.hpp"
}
- struct dvd_contents
- {
- enum pgc_type { unknown_pgc, menu_pgc, title_pgc };
-
- struct pgc_ref
- {
- explicit pgc_ref(pgc_type type = unknown_pgc,
- int index = -1,
- int sub_index = 0)
- : type(type), index(index), sub_index(sub_index)
- {}
- bool operator==(const pgc_ref & other) const
- {
- return type == other.type && index == other.index;
- }
- bool operator!=(const pgc_ref & other) const
- {
- return !(*this == other);
- }
-
- pgc_type type; // Menu or title reference?
- unsigned index; // Menu or title index (within resp. vector)
- unsigned sub_index; // Button or chapter number (1-based; 0 if
- // unspecified; not compared!)
- };
-
- struct menu
- {
- menu()
- : vob_temp(new temp_file("webdvd-vob-"))
- {
- vob_temp->close();
- }
-
- boost::shared_ptr<temp_file> vob_temp;
- std::vector<pgc_ref> entries;
- };
-
- struct title
- {
- explicit title(const std::string & vob_list)
- : vob_list(vob_list)
- {}
-
- std::string vob_list;
- };
-
- std::vector<menu> menus;
- std::vector<title> titles;
- };
-
- void generate_dvd(const dvd_contents & contents,
- const std::string & output_dir);
-
class webdvd_window : public Gtk::Window
{
public:
}
}
- void generate_dvd(const dvd_contents & contents,
- const std::string & output_dir)
- {
- temp_file temp("webdvd-dvdauthor-");
- temp.close();
- std::ofstream file(temp.get_name().c_str());
-
- // We generate code that uses registers in the following way:
- //
- // g0: scratch
- // g1: current location
- // g12: location that last jumped to a video
- //
- // All locations are divided into two bitfields: the least
- // significant 10 bits are a page/menu number and the most
- // significant 6 bits are a link/button number, and numbering
- // starts at 1, not 0. This is done for compatibility with
- // the encoding of the s8 (button) register.
- //
- static const int button_mult = dvd::reg_s8_button_mult;
- static const int menu_mask = button_mult - 1;
- static const int button_mask = (1 << dvd::reg_bits) - button_mult;
-
- file <<
- "<dvdauthor>\n"
- " <vmgm>\n"
- " <menus>\n";
-
- for (unsigned menu_num = 0;
- menu_num != contents.menus.size();
- ++menu_num)
- {
- const dvd_contents::menu & menu = contents.menus[menu_num];
-
- if (menu_num == 0)
- {
- // This is the first (title) menu, displayed when the
- // disc is first played.
- file <<
- " <pgc entry='title'>\n"
- " <pre>\n"
- // Initialise the current location if it is not set
- // (all general registers are initially 0).
- " if (g1 eq 0)\n"
- " g1 = " << 1 + button_mult << ";\n";
- }
- else
- {
- file <<
- " <pgc>\n"
- " <pre>\n";
- }
-
- // When a title finishes or the user presses the menu
- // button, this always jumps to the titleset's root menu.
- // We want to return the user to the last menu they used.
- // So we arrange for each titleset's root menu to return
- // to the vmgm title menu and then dispatch from there to
- // whatever the correct menu is. We determine the correct
- // menu by looking at the menu part of g1.
-
- file << " g0 = g1 & " << menu_mask << ";\n";
-
- // There is a limit of 128 VM instructions in each PGC.
- // Therefore in each menu's <pre> section we generate
- // jumps to menus with numbers greater by 512, 256, 128,
- // ..., 1 where (a) such a menu exists, (b) this menu
- // number is divisible by twice that increment and (c) the
- // correct menu is that or a later menu. Thus each menu
- // has at most 10 such conditional jumps and is reachable
- // by at most 10 jumps from the title menu. This chain of
- // jumps might take too long on some players; this has yet
- // to be investigated.
-
- for (std::size_t menu_incr = (menu_mask + 1) / 2;
- menu_incr != 0;
- menu_incr /= 2)
- {
- if (menu_num + menu_incr < contents.menus.size()
- && (menu_num & (menu_incr * 2 - 1)) == 0)
- {
- file <<
- " if (g0 ge " << 1 + menu_num + menu_incr
- << ")\n"
- " jump menu " << 1 + menu_num + menu_incr
- << ";\n";
- }
- }
-
- file <<
- // Highlight the appropriate button.
- " s8 = g1 & " << button_mask << ";\n"
- " </pre>\n"
- " <vob file='" << menu.vob_temp->get_name() << "'/>\n";
-
- for (unsigned button_num = 0;
- button_num != menu.entries.size();
- ++button_num)
- {
- const dvd_contents::pgc_ref & target =
- menu.entries[button_num];
-
- file << " <button> ";
-
- if (target.type == dvd_contents::menu_pgc)
- {
- unsigned target_button_num;
-
- if (target.sub_index)
- {
- target_button_num = target.sub_index;
- }
- else
- {
- // Look for a button on the new menu that links
- // back to this one. If there is one, set that to
- // be the highlighted button; otherwise, use the
- // first button.
- const std::vector<dvd_contents::pgc_ref> &
- target_menu_entries =
- contents.menus[target.index].entries;
- dvd_contents::pgc_ref this_pgc(dvd_contents::menu_pgc,
- menu_num);
- target_button_num = target_menu_entries.size();
- while (target_button_num != 0
- && (target_menu_entries[--target_button_num]
- != this_pgc))
- ;
- target_button_num += 1;
- }
-
- file << "g1 = "
- << (1 + target.index
- + target_button_num * button_mult)
- << "; jump menu " << 1 + target.index << ";";
- }
- else
- {
- assert(target.type == dvd_contents::title_pgc);
-
- file << "g1 = "
- << 1 + menu_num + (1 + button_num) * button_mult
- << "; jump title "
- << 1 + target.index;
- if (target.sub_index)
- file << " chapter " << target.sub_index;
- file << ";";
- }
-
- file << " </button>\n";
- }
-
- file << " </pgc>\n";
- }
-
- file <<
- " </menus>\n"
- " </vmgm>\n";
-
- // Generate a titleset for each title. This appears to make
- // jumping to titles a whole lot simpler (but limits us to 99
- // titles).
- for (unsigned title_num = 0;
- title_num != contents.titles.size();
- ++title_num)
- {
- file <<
- " <titleset>\n"
- // Generate a dummy menu so that the menu button on the
- // remote control will work.
- " <menus>\n"
- " <pgc entry='root'>\n"
- " <pre> jump vmgm menu; </pre>\n"
- " </pgc>\n"
- " </menus>\n"
- " <titles>\n"
- " <pgc>\n"
- // Record calling location.
- " <pre> g12 = g1; </pre>\n"
- << contents.titles[title_num].vob_list <<
- // If the menu location has not been changed during
- // the title, set the location to be the following
- // button in the menu. In any case, return to some
- // menu.
- " <post> if (g1 eq g12) g1 = g1 + " << button_mult
- << "; call menu; </post>\n"
- " </pgc>\n"
- " </titles>\n"
- " </titleset>\n";
- }
-
- file <<
- "</dvdauthor>\n";
-
- file.close();
-
- {
- const char * argv[] = {
- "dvdauthor",
- "-o", output_dir.c_str(),
- "-x", temp.get_name().c_str(),
- 0
- };
- int command_result;
- Glib::spawn_sync(".",
- Glib::ArrayHandle<std::string>(
- argv, sizeof(argv)/sizeof(argv[0]),
- Glib::OWNERSHIP_NONE),
- Glib::SPAWN_SEARCH_PATH
- | Glib::SPAWN_STDOUT_TO_DEV_NULL,
- SigC::Slot0<void>(),
- 0, 0,
- &command_result);
- if (command_result != 0)
- throw std::runtime_error("dvdauthor failed");
- }
- }
-
const video::frame_params & lookup_frame_params(const char * str)
{
assert(str);
projects / videolink.git / commitdiff