-// Copyright 2005-6 Ben Hutchings <ben@decadentplace.org.uk>.
+// Copyright 2005-8 Ben Hutchings <ben@decadent.org.uk>.
// See the file "COPYING" for licence details.
+#include <cassert>
+#include <cerrno>
+#include <cstring>
#include <fstream>
+#include <iomanip>
+#include <iostream>
+#include <ostream>
+#include <sstream>
#include <stdexcept>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <gdkmm/pixbuf.h>
+#include <glibmm/miscutils.h>
#include <glibmm/spawn.h>
#include "dvd.hpp"
#include "generate_dvd.hpp"
#include "xml_utils.hpp"
-dvd_contents::menu::menu()
- : vob_temp(new temp_file("webdvd-vob-"))
+namespace
{
- vob_temp->close();
+ // Return a closeness metric of an "end" rectangle to a "start"
+ // rectangle in the upward (-1) or downward (+1) direction. Given
+ // several possible "end" rectangles, the one that seems visually
+ // closest in the given direction should have the highest value of
+ // this metric. This is necessarily a heuristic function!
+ double directed_closeness(const rectangle & start, const rectangle & end,
+ int y_dir)
+ {
+ // The obvious approach is to use the centres of the
+ // rectangles. However, for the "end" rectangle, using the
+ // horizontal position nearest the centre of the "start"
+ // rectangle seems to produce more reasonable results. For
+ // example, if there are two "end" rectangles equally near to
+ // the "start" rectangle in terms of vertical distance and one
+ // of them horizontally overlaps the centre of the "start"
+ // rectangle, we want to pick that one even if the centre of
+ // that rectangle is further away from the centre of the
+ // "start" rectangle.
+ int start_x = (start.left + start.right) / 2;
+ int start_y = (start.top + start.bottom) / 2;
+ int end_y = (end.top + end.bottom) / 2;
+ int end_x;
+ if (end.right < start_x)
+ end_x = end.right;
+ else if (end.left > start_x)
+ end_x = end.left;
+ else
+ end_x = start_x;
+
+ // Return cosine of angle between the line between these points
+ // and the vertical, divided by the distance between the points
+ // if that is defined and positive; otherwise return 0.
+ int vertical_distance = (end_y - start_y) * y_dir;
+ if (vertical_distance <= 0)
+ return 0.0;
+ double distance_squared =
+ (end_x - start_x) * (end_x - start_x)
+ + (end_y - start_y) * (end_y - start_y);
+ return vertical_distance / distance_squared;
+ }
+
+ std::string temp_file_name(const temp_dir & dir,
+ std::string base_name,
+ unsigned index=0)
+ {
+ if (index != 0)
+ {
+ std::size_t index_pos = base_name.find("%3d");
+ assert(index_pos != std::string::npos);
+ base_name[index_pos] = '0' + index / 100;
+ base_name[index_pos + 1] = '0' + (index / 10) % 10;
+ base_name[index_pos + 2] = '0' + index % 10;
+ }
+
+ return Glib::build_filename(dir.get_name(), base_name);
+ }
+
+ // We would like to use just a single frame for the menu but this
+ // seems not to be legal or compatible. The minimum length of a
+ // cell is 0.4 seconds but I've seen a static menu using 12 frames
+ // on a commercial "PAL" disc so let's use 12 frames regardless.
+ unsigned menu_duration_frames(const video::frame_params & params)
+ {
+ return 12;
+ }
+ double menu_duration_seconds(const video::frame_params & params)
+ {
+ return double(menu_duration_frames(params))
+ / double(params.rate_numer)
+ * double(params.rate_denom);
+ }
+
+ void throw_length_error(const char * limit_type, std::size_t limit)
+ {
+ std::ostringstream oss;
+ oss << "exceeded DVD limit: " << limit_type << " > " << limit;
+ throw std::length_error(oss.str());
+ }
+
+ // dvdauthor uses some menu numbers to represent entry points -
+ // distinct from the actual numbers of the menus assigned as those
+ // entry points - resulting in a practical limit of 119 per
+ // domain. This seems to be an oddity of the parser that could be
+ // fixed, but for now we'll have to work with it.
+ const unsigned dvdauthor_anonymous_menus_max = dvd::domain_pgcs_max - 8;
+
+ // The current navigation code packs menu and button number into a
+ // single register, so the number of menus is limited to
+ // dvd::reg_s8_button_mult - 1 == 1023. However temp_file_name()
+ // is limited to 999 numbered files and it seems pointless to
+ // change it to get another 24.
+ // If people really need more we could use separate menu and
+ // button number registers, possibly allowing up to 11900 menus
+ // (the size of the indirect jump tables might become a problem
+ // though).
+ const unsigned menus_max = 999;
}
-void generate_dvd(const dvd_contents & contents,
- const std::string & output_dir)
+dvd_generator::dvd_generator(const video::frame_params & frame_params,
+ mpeg_encoder encoder)
+ : temp_dir_("videolink-"),
+ frame_params_(frame_params),
+ encoder_(encoder)
+{}
+
+dvd_generator::pgc_ref dvd_generator::add_menu()
{
- temp_file temp("webdvd-dvdauthor-");
- temp.close();
- std::ofstream file(temp.get_name().c_str());
+ pgc_ref next_menu(menu_pgc, menus_.size());
- // 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)
+ if (next_menu.index == menus_max)
+ throw_length_error("number of menus", menus_max);
+
+ menus_.resize(next_menu.index + 1);
+ return next_menu;
+}
+
+void dvd_generator::add_menu_entry(unsigned index,
+ const rectangle & area,
+ const pgc_ref & target)
+{
+ assert(index < menus_.size());
+ assert(target.type == menu_pgc && target.index < menus_.size()
+ || target.type == title_pgc && target.index < titles_.size());
+
+ if (menus_[index].entries.size() == dvd::menu_buttons_max)
+ throw_length_error("number of buttons", dvd::menu_buttons_max);
+
+ menu_entry new_entry = { area, target };
+ menus_[index].entries.push_back(new_entry);
+}
+
+void dvd_generator::generate_menu_vob(unsigned index,
+ Glib::RefPtr<Gdk::Pixbuf> background,
+ Glib::RefPtr<Gdk::Pixbuf> highlights)
+ const
+{
+ assert(index < menus_.size());
+ const menu & this_menu = menus_[index];
+
+ std::string background_name(
+ temp_file_name(temp_dir_, "menu-%3d-back.png", 1 + index));
+ std::cout << "INFO: Saving " << background_name << std::endl;
+ background->save(background_name, "png");
+
+ std::string highlights_name(
+ temp_file_name(temp_dir_, "menu-%3d-links.png", 1 + index));
+ std::cout << "INFO: Saving " << highlights_name << std::endl;
+ highlights->save(highlights_name, "png");
+
+ std::string spumux_name(
+ temp_file_name(temp_dir_, "menu-%3d.subpictures", 1 + index));
+ std::ofstream spumux_file(spumux_name.c_str());
+ spumux_file <<
+ "<subpictures>\n"
+ " <stream>\n"
+ " <spu force='yes' start='00:00:00.00'\n"
+ " highlight='" << highlights_name << "'\n"
+ " select='" << highlights_name << "'>\n";
+ int button_count = this_menu.entries.size();
+ for (int i = 0; i != button_count; ++i)
{
- const dvd_contents::menu & menu = contents.menus[menu_num];
+ const menu_entry & this_entry = this_menu.entries[i];
- if (menu_num == 0)
- {
- // This is the first (title) menu, displayed when the
- // disc is first played.
- file <<
- " <pgc entry='title' pause='inf'>\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
+ // We program left and right to cycle through the buttons in
+ // the order the entries were added. This should result in
+ // left and right behaving like the tab and shift-tab keys
+ // would in the browser. Hopefully that's a sensible order.
+ // We program up and down to behave geometrically.
+ int up_button = i, down_button = i;
+ double up_closeness = 0.0, down_closeness = 0.0;
+ for (int j = 0; j != button_count; ++j)
{
- file <<
- " <pgc pause='inf'>\n"
- " <pre>\n";
+ const menu_entry & other_entry = this_menu.entries[j];
+ double closeness = directed_closeness(
+ this_entry.area, other_entry.area, -1);
+ if (closeness > up_closeness)
+ {
+ up_button = j;
+ up_closeness = closeness;
+ }
+ else
+ {
+ closeness = directed_closeness(
+ this_entry.area, other_entry.area, 1);
+ if (closeness > down_closeness)
+ {
+ down_button = j;
+ down_closeness = closeness;
+ }
+ }
}
+ // Pad vertically to even y coordinates since dvdauthor claims
+ // odd values may result in incorrect display.
+ // XXX This may cause overlappping where it wasn't previously
+ // a problem.
+ spumux_file << " <button"
+ " x0='" << this_entry.area.left << "'"
+ " y0='" << (this_entry.area.top & ~1) << "'"
+ " x1='" << this_entry.area.right << "'"
+ " y1='" << ((this_entry.area.bottom + 1) & ~1) << "'"
+ " left='" << (i == 0 ? button_count : i) << "'"
+ " right='" << 1 + (i + 1) % button_count << "'"
+ " up='" << 1 + up_button << "'"
+ " down='" << 1 + down_button << "'"
+ "/>\n";
+ }
+ spumux_file <<
+ " </spu>\n"
+ " </stream>\n"
+ "</subpictures>\n";
+ spumux_file.close();
+ if (!spumux_file)
+ throw std::runtime_error("Failed to write control file for spumux");
+
+ std::string output_name(
+ temp_file_name(temp_dir_, "menu-%3d.mpeg", 1 + index));
+
+ std::ostringstream command_stream;
+ if (encoder_ == mpeg_encoder_ffmpeg)
+ {
+ command_stream <<
+ "ffmpeg -f image2 -vcodec png"
+ " -r " << frame_params_.rate_numer <<
+ "/" << frame_params_.rate_denom <<
+ " -loop_input -i " << background_name <<
+ " -t " << menu_duration_seconds(frame_params_) <<
+ " -target " << frame_params_.common_name << "-dvd"
+ " -aspect 4:3 -an -y /dev/stdout";
+ }
+ else
+ {
+ assert(encoder_ == mpeg_encoder_mjpegtools);
+ command_stream
+ << "pngtopnm " << background_name
+ << " | ppmtoy4m -v0 -n" << menu_duration_frames(frame_params_)
+ << " -F" << frame_params_.rate_numer << ":" << frame_params_.rate_denom
+ << " -A" << frame_params_.pixel_ratio_width
+ << ":" << frame_params_.pixel_ratio_height
+ << " -Ip -S420mpeg2"
+ " | mpeg2enc -v0 -f8 -a2 -o/dev/stdout"
+ " | mplex -v0 -f8 -o/dev/stdout /dev/stdin";
+ }
+ command_stream
+ << " | spumux -v0 -mdvd " << spumux_name << " > " << output_name;
+ std::string command(command_stream.str());
+ const char * argv[] = {
+ "/bin/sh", "-c", command.c_str(), 0
+ };
+ std::cout << "INFO: Running " << command << std::endl;
+ int command_result;
+ Glib::spawn_sync(".",
+ Glib::ArrayHandle<std::string>(
+ argv, sizeof(argv)/sizeof(argv[0]),
+ Glib::OWNERSHIP_NONE),
+ Glib::SPAWN_STDOUT_TO_DEV_NULL,
+ sigc::slot<void>(),
+ 0, 0,
+ &command_result);
+ struct stat stat_buf;
+ if (command_result != 0 || stat(output_name.c_str(), &stat_buf) != 0
+ || stat_buf.st_size == 0)
+ throw std::runtime_error("spumux pipeline failed");
+}
+
+dvd_generator::pgc_ref dvd_generator::add_title(vob_list & content)
+{
+ pgc_ref next_title(title_pgc, titles_.size());
+
+ // Check against maximum number of titles.
+ if (next_title.index == dvd::titles_max)
+ throw_length_error("number of titles", dvd::titles_max);
+
+ titles_.resize(next_title.index + 1);
+ titles_[next_title.index].swap(content);
+ return next_title;
+}
+
+void dvd_generator::generate(const std::string & output_dir) const
+{
+ // This function uses a mixture of 0-based and 1-based numbering,
+ // due to the differing conventions of the language and the DVD
+ // format. Variable names ending in "_index" indicate 0-based
+ // indices and variable names ending in "_num" indicate 1-based
+ // numbers.
+
+ std::string name(temp_file_name(temp_dir_, "videolink.dvdauthor"));
+ std::ofstream file(name.c_str());
+ file << "<dvdauthor>\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)
+ // We generate code that uses registers in the following way:
+ //
+ // g0: Scratch.
+ // g1: Target location when jumping between menus. Top 6 bits are
+ // the button number (like s8) and bottom 10 bits are the menu
+ // number. This is used for selecting the appropriate button
+ // when entering a menu, for completing indirect jumps between
+ // domains, and for jumping to the correct menu after exiting a
+ // title. This is set to 0 in the pre-routine of the target
+ // menu.
+ // g2: Current location in menus. This is used for jumping to the
+ // correct menu when the player exits a title.
+ // g3: Target chapter number plus 1 when jumping to a title.
+ // This is used to jump to the correct chapter and to
+ // distinguish between indirect jumps to menus and titles.
+ // This is set to 0 in the pre-routine of the target title.
+ // g4: Source menu location used to jump to a title. This is
+ // compared with g2 to determine whether to increment the
+ // button number if the title is played to the end.
+
+ static const unsigned button_mult = dvd::reg_s8_button_mult;
+ static const unsigned menu_mask = button_mult - 1;
+ static const unsigned button_mask = (1U << dvd::reg_bits) - button_mult;
+
+ // Iterate over VMGM and titlesets. For these purposes, we
+ // consider the VMGM to be titleset 0.
+
+ // We need a titleset for each title, and we may also need titlesets to
+ // hold extra menus if we have too many for the VMGM.
+ // Also, we need at least one titleset.
+ const unsigned titleset_end = std::max<unsigned>(
+ 1U + std::max<unsigned>(1U, titles_.size()),
+ (menus_.size() + dvdauthor_anonymous_menus_max - 1)
+ / dvdauthor_anonymous_menus_max);
+
+ for (unsigned titleset_num = 0;
+ titleset_num != titleset_end;
+ ++titleset_num)
+ {
+ const char * const outer_element_name =
+ titleset_num == 0 ? "vmgm" : "titleset";
+ const bool have_real_title =
+ titleset_num != 0 && titleset_num <= titles_.size();
+ const bool have_real_menus =
+ titleset_num * dvdauthor_anonymous_menus_max < menus_.size();
+
+ file << " <" << outer_element_name << ">\n" <<
+ " <menus>\n"
+ " <video format='" << frame_params_.common_name << "'/>\n";
+
+ const unsigned menu_begin = titleset_num * dvdauthor_anonymous_menus_max;
+ const unsigned menu_end =
+ have_real_menus
+ ? std::min<unsigned>(
+ (titleset_num + 1) * dvdauthor_anonymous_menus_max,
+ menus_.size())
+ : menu_begin + 1;
+
+ for (unsigned menu_index = menu_begin;
+ menu_index != menu_end;
+ ++menu_index)
{
- if (menu_num + menu_incr < contents.menus.size()
- && (menu_num & (menu_incr * 2 - 1)) == 0)
+ // There are various cases in which menus may be called:
+ //
+ // 1. The user follows a direct link to the menu.
+ // 2. The user follows an indirect link to some other menu
+ // and that goes via this menu. This is distinguished
+ // from case 1 by the value of g1. We must jump to or
+ // at least toward the other menu.
+ // 3. The title menu is called when the disc is first
+ // played or the user presses the "top menu" button.
+ // This is distinguished from cases 2 and 3 by g1 == 0.
+ // We make this look like case 1.
+ // 4. The root menu of a titleset is called when the user
+ // follows an indirect link to the title. This is
+ // distinguished from all other cases by g3 != 0. We
+ // must jump to the title.
+ // 5. The root menu of a titleset is called when the title
+ // ends or the user presses the "menu" button during
+ // the title. This is distinguished from cases 1, 2
+ // and 4 by g1 == 0 and g3 == 0. We must jump to the
+ // latest menu (which can turn into case 1 or 2).
+ //
+ // Cases 3 and 5 do not apply to the same menus so they
+ // do not need to be distinguished.
+
+ if (menu_index == 0)
{
+ // Title menu.
file <<
- " if (g0 ge " << 1 + menu_num + menu_incr
- << ")\n"
- " jump menu " << 1 + menu_num + menu_incr
- << ";\n";
+ " <pgc entry='title'>\n"
+ " <pre>\n"
+ " if (g1 eq 0)\n" // case 3
+ " g1 = " << 1 + button_mult << ";\n";
+ }
+ else if (menu_index == titleset_num * dvdauthor_anonymous_menus_max)
+ {
+ // Root menu.
+ file <<
+ " <pgc entry='root'>\n"
+ " <pre>\n";
+ if (have_real_title)
+ {
+ file <<
+ " if (g3 ne 0)\n" // case 4
+ " jump title 1;\n"
+ " if (g1 eq 0) {\n" // case 5
+ " g1 = g2;\n"
+ " jump vmgm menu entry title;\n"
+ " }\n";
+ }
+ }
+ else
+ {
+ // Some other menu.
+ file <<
+ " <pgc>\n"
+ " <pre>\n";
+ }
+
+ if (!have_real_menus)
+ {
+ // This is a root menu only reachable from the title.
+ file <<
+ " </pre>\n"
+ " </pgc>\n";
+ continue;
+ }
+
+ const menu & this_menu = menus_[menu_index];
+
+ // Detect and handle case 2.
+ //
+ // There is a limit of 128 VM instructions in each PGC.
+ // Also, we can't jump to an arbitrary menu in another
+ // domain. Finally, we can't do computed jumps.
+ // Therefore we statically expand and distribute a binary
+ // search across the menus, resulting in a code size of
+ // O(log(menu_count)) in each menu. In practice there are
+ // at most 11 conditional jumps needed in any menu.
+ //
+ // The initial bounds of the binary search are strange
+ // because we must ensure that any jump between titlesets
+ // is to the first menu of the titleset, marked as the
+ // root entry.
+
+ // Mask target location to get the target menu.
+ file << " g0 = g1 & " << menu_mask << ";\n";
+
+ for (unsigned
+ bottom = 0,
+ top = 16 * dvdauthor_anonymous_menus_max;
+ top - bottom > 1;)
+ {
+ unsigned middle = (bottom + top) / 2;
+ if (menu_index == bottom && middle < menus_.size())
+ {
+ file << " if (g0 ge " << 1 + middle << ")\n"
+ << " jump ";
+ unsigned target_titleset_num =
+ middle / dvdauthor_anonymous_menus_max;
+ if (target_titleset_num != titleset_num)
+ {
+ assert(middle % dvdauthor_anonymous_menus_max == 0);
+ file << "titleset " << target_titleset_num
+ << " menu entry root";
+ }
+ else
+ {
+ file << "menu "
+ << 1 + middle % dvdauthor_anonymous_menus_max;
+ }
+ file << ";\n";
+ }
+ if (menu_index >= middle)
+ bottom = middle;
+ else
+ top = middle;
}
- }
- file <<
+ // Case 1.
+
// Highlight the appropriate button.
- " s8 = g1 & " << button_mask << ";\n"
- " </pre>\n"
- " <vob file='" << menu.vob_temp->get_name() << "'/>\n";
+ file << " s8 = g1 & " << button_mask << ";\n";
- for (unsigned button_num = 0;
- button_num != menu.entries.size();
- ++button_num)
- {
- const dvd_contents::pgc_ref & target =
- menu.entries[button_num];
+ // Copy the target location to the current location and
+ // then clear the target location so that the title menu
+ // can distinguish cases 2 and 3.
+ file <<
+ " g2 = g1;\n"
+ " g1 = 0;\n";
- file << " <button> ";
+ file <<
+ " </pre>\n"
+ " <vob file='"
+ << temp_file_name(temp_dir_, "menu-%3d.mpeg",
+ 1 + menu_index)
+ << "'>\n"
+ // Define a cell covering the whole menu and set a still
+ // time at the end of that, since it seems all players
+ // support that but some ignore a still time set on a PGC.
+ " <cell start='0' end='"
+ << std::fixed << std::setprecision(4)
+ << menu_duration_seconds(frame_params_) << "'"
+ " chapter='yes' pause='inf'/>\n"
+ " </vob>\n";
- if (target.type == dvd_contents::menu_pgc)
+ for (unsigned button_index = 0;
+ button_index != this_menu.entries.size();
+ ++button_index)
{
- unsigned target_button_num;
+ const pgc_ref & target =
+ this_menu.entries[button_index].target;
+
+ file << " <button> ";
- if (target.sub_index)
+ if (target.type == menu_pgc)
{
- target_button_num = target.sub_index;
+ 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<menu_entry> & target_menu_entries =
+ menus_[target.index].entries;
+ pgc_ref this_pgc(menu_pgc, menu_index);
+ target_button_num = target_menu_entries.size();
+ while (target_button_num != 1
+ && (target_menu_entries[target_button_num - 1].target
+ != this_pgc))
+ --target_button_num;
+ }
+
+ // Set new menu location.
+ file << "g1 = "
+ << (1 + target.index + target_button_num * button_mult)
+ << "; ";
+ // Jump to the target menu.
+ unsigned target_titleset_num =
+ target.index / dvdauthor_anonymous_menus_max;
+ if (target_titleset_num == titleset_num)
+ file << "jump menu "
+ << 1 + (target.index
+ % dvdauthor_anonymous_menus_max)
+ << "; ";
+ else if (target_titleset_num == 0)
+ file << "jump vmgm menu entry title; ";
+ else
+ file << "jump titleset " << target_titleset_num
+ << " menu entry root; ";
}
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;
+ assert(target.type == title_pgc);
+
+ // Record current menu location and set target chapter
+ // number.
+ file <<
+ "g2 = " << (1 + menu_index
+ + (1 + button_index) * button_mult) << "; "
+ "g3 = " << 1 + target.sub_index << "; ";
+ // Jump to the target title, possibly via its titleset's
+ // root menu.
+ unsigned target_titleset_num = 1 + target.index;
+ if (titleset_num == 0)
+ file << "jump title " << target_titleset_num << "; ";
+ else if (target_titleset_num == titleset_num)
+ file << "jump title 1; ";
+ else
+ file << "jump titleset " << target_titleset_num
+ << " menu entry root; ";
}
-
- file << "g1 = "
- << (1 + target.index
- + target_button_num * button_mult)
- << "; jump menu " << 1 + target.index << ";";
+
+ file << "</button>\n";
}
- else
+
+ file <<
+ " </pgc>\n";
+ }
+
+ file << " </menus>\n";
+
+ if (have_real_title)
+ {
+ file <<
+ " <titles>\n"
+ " <video format='" << frame_params_.common_name << "'/>\n"
+ " <pgc>\n";
+
+ file << " <pre>\n";
+
+ // Count chapters in the title.
+ unsigned n_chapters = 0;
+ for (vob_list::const_iterator
+ it = titles_[titleset_num - 1].begin(),
+ end = titles_[titleset_num - 1].end();
+ it != end;
+ ++it)
{
- assert(target.type == dvd_contents::title_pgc);
-
- file << "g1 = "
- << 1 + menu_num + (1 + button_num) * button_mult
- << "; jump title "
- << 1 + target.index;
- // FIXME: Here we should check target.sub_index and
- // jump to a specific chapter if it is non-zero.
- // However, we can't jump directly to chapters from
- // the VMGM.
- file << ";";
+ // Chapter start times may be specified in the "chapters"
+ // attribute as a comma-separated list. If this is not
+ // specified then the beginning of each file starts a new
+ // chapter. Thus the number of chapters in each file is
+ // the number of commas in the chapter attribute, plus 1.
+ ++n_chapters;
+ std::size_t pos = 0;
+ while ((pos = it->chapters.find(',', pos)) != std::string::npos)
+ {
+ ++n_chapters;
+ ++pos;
+ }
}
- file << " </button>\n";
- }
+ // Move the chapter number to scratch so the root menu can
+ // distinguish cases 4 and 5.
+ file << " g0 = g3; g3 = 0;\n";
- file <<
- // Some DVD players don't seem to obey pause='inf' so make
- // them loop.
- " <post>\n"
- " jump cell 1;\n"
- " </post>\n"
- " </pgc>\n";
- }
+ // Copy the latest menu location for use by the post-routine.
+ file << " g4 = g2;\n";
+
+ // Jump to the correct chapter.
+ for (unsigned chapter_num = 1;
+ chapter_num <= n_chapters;
+ ++chapter_num)
+ file <<
+ " if (g0 eq " << 1 + chapter_num << ")\n"
+ " jump chapter " << chapter_num << ";\n";
- file <<
- " </menus>\n"
- " </vmgm>\n";
+ file << " </pre>\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";
-
- for (vob_list::const_iterator it = contents.titles[title_num].begin(),
- end = contents.titles[title_num].end();
- it != end;
- ++it)
+ for (vob_list::const_iterator
+ it = titles_[titleset_num - 1].begin(),
+ end = titles_[titleset_num - 1].end();
+ it != end;
+ ++it)
+ {
+ file << " <vob file='" << xml_escape(it->file) << "'";
+ if (!it->chapters.empty())
+ file << " chapters='" << xml_escape(it->chapters) << "'";
+ if (!it->pause.empty())
+ file << " pause='" << xml_escape(it->pause) << "'";
+ file << "/>\n";
+ }
+
+ // If the user has not exited to the menus and then
+ // resumed the title, set the latest menu location to be
+ // the button after the one that linked to this title.
+ // In any case, return to the (root) menu which will
+ // then jump to the correct menu.
+ file <<
+ " <post>\n"
+ " if (g2 eq g4)\n"
+ " g2 = g2 + " << button_mult << ";\n"
+ " call menu;\n"
+ " </post>\n"
+ " </pgc>\n"
+ " </titles>\n";
+ }
+ else if (titleset_num != 0) // && !have_real_title
{
- file << " <vob file='" << xml_escape(it->file) << "'";
- if (!it->chapters.empty())
- file << " chapters='" << xml_escape(it->chapters) << "'";
- if (!it->pause.empty())
- file << " pause='" << xml_escape(it->pause) << "'";
- file << "/>\n";
+ file << " <titles><pgc/></titles>\n";
}
- file <<
- // 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 << " </" << outer_element_name << ">\n";
}
- file <<
- "</dvdauthor>\n";
-
+ file << "</dvdauthor>\n";
file.close();
{
const char * argv[] = {
"dvdauthor",
"-o", output_dir.c_str(),
- "-x", temp.get_name().c_str(),
+ "-x", name.c_str(),
0
};
int command_result;
Glib::OWNERSHIP_NONE),
Glib::SPAWN_SEARCH_PATH
| Glib::SPAWN_STDOUT_TO_DEV_NULL,
- SigC::Slot0<void>(),
+ sigc::slot<void>(),
0, 0,
&command_result);
if (command_result != 0)
projects / videolink.git / blobdiff