// See the file "COPYING" for licence details.
#include <fstream>
+#include <iostream>
+#include <sstream>
#include <stdexcept>
+#include <gdkmm/pixbuf.h>
#include <glibmm/spawn.h>
#include "dvd.hpp"
#include "generate_dvd.hpp"
#include "xml_utils.hpp"
-dvd_contents::menu::menu()
+namespace
+{
+ // 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;
+ }
+}
+
+dvd_generator::menu::menu()
: vob_temp(new temp_file("videolink-vob-"))
{
vob_temp->close();
}
-void generate_dvd(const dvd_contents & contents,
- const std::string & output_dir)
+dvd_generator::pgc_ref dvd_generator::add_menu()
+{
+ pgc_ref next_menu(menu_pgc, menus_.size());
+
+ // Check against maximum number of menus. It appears that no more
+ // than 128 menus are reachable through LinkPGCN instructions, and
+ // dvdauthor uses some menu numbers for special purposes, resulting
+ // in a practical limit of 119 per domain. We can work around this
+ // later by spreading some menus across titlesets.
+ if (next_menu.index == 119)
+ throw std::runtime_error("No more than 119 menus can be used");
+
+ 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());
+ 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];
+
+ temp_file background_temp("videolink-back-");
+ background_temp.close();
+ std::cout << "saving " << background_temp.get_name() << std::endl;
+ background->save(background_temp.get_name(), "png");
+
+ temp_file highlights_temp("videolink-links-");
+ highlights_temp.close();
+ std::cout << "saving " << highlights_temp.get_name() << std::endl;
+ highlights->save(highlights_temp.get_name(), "png");
+
+ temp_file spumux_temp("videolink-spumux-");
+ spumux_temp.close();
+ std::ofstream spumux_file(spumux_temp.get_name().c_str());
+ spumux_file <<
+ "<subpictures>\n"
+ " <stream>\n"
+ " <spu force='yes' start='00:00:00.00'\n"
+ " highlight='" << highlights_temp.get_name() << "'\n"
+ " select='" << highlights_temp.get_name() << "'>\n";
+ int button_count = this_menu.entries.size();
+ for (int i = 0; i != button_count; ++i)
+ {
+ const menu_entry & this_entry = this_menu.entries[i];
+
+ // 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)
+ {
+ 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;
+ }
+ }
+ }
+ spumux_file << " <button"
+ " x0='" << this_entry.area.left << "'"
+ " y0='" << this_entry.area.top << "'"
+ " x1='" << this_entry.area.right << "'"
+ " y1='" << this_entry.area.bottom << "'"
+ " 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::ostringstream command_stream;
+ if (encoder_ == mpeg_encoder_ffmpeg)
+ {
+ command_stream
+ << "ffmpeg"
+ << " -f image2 -vcodec png -i "
+ << background_temp.get_name()
+ << " -target " << frame_params_.common_name << "-dvd"
+ << " -vcodec mpeg2video -aspect 4:3 -an -y /dev/stdout";
+ }
+ else
+ {
+ assert(encoder_ == mpeg_encoder_mjpegtools_old
+ || encoder_ == mpeg_encoder_mjpegtools_new);
+ command_stream
+ << "pngtopnm "
+ << background_temp.get_name()
+ << " | ppmtoy4m -v0 -n1 -F"
+ << frame_params_.rate_numer << ":" << frame_params_.rate_denom
+ << " -A" << frame_params_.pixel_ratio_width
+ << ":" << frame_params_.pixel_ratio_height
+ << " -Ip ";
+ // The chroma subsampling keywords changed between
+ // versions 1.6.2 and 1.8 of mjpegtools. There is no
+ // keyword that works with both.
+ if (encoder_ == mpeg_encoder_mjpegtools_old)
+ command_stream << "-S420_mpeg2";
+ else
+ command_stream << "-S420mpeg2";
+ command_stream <<
+ " | mpeg2enc -v0 -f8 -a2 -o/dev/stdout"
+ " | mplex -v0 -f8 -o/dev/stdout /dev/stdin";
+ }
+ command_stream
+ << " | spumux -v0 -mdvd " << spumux_temp.get_name()
+ << " > " << this_menu.vob_temp->get_name();
+ std::string command(command_stream.str());
+ const char * argv[] = {
+ "/bin/sh", "-c", command.c_str(), 0
+ };
+ std::cout << "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::Slot0<void>(),
+ 0, 0,
+ &command_result);
+ if (command_result != 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 == 99)
+ throw std::runtime_error("No more than 99 titles can be used");
+
+ 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
{
temp_file temp("videolink-dvdauthor-");
temp.close();
// We generate code that uses registers in the following way:
//
// g0: scratch
- // g1: current location
- // g2: location that last jumped to a title
+ // g1: target menu location
+ // g2: source/return menu location for title
// g3: target chapter number
//
// All locations are divided into two bitfields: the least
" <vmgm>\n"
" <menus>\n";
- for (unsigned menu_index = 0;
- menu_index != contents.menus.size();
- ++menu_index)
+ for (unsigned menu_index = 0; menu_index != menus_.size(); ++menu_index)
{
- const dvd_contents::menu & menu = contents.menus[menu_index];
+ const menu & this_menu = menus_[menu_index];
if (menu_index == 0)
{
file <<
" <pgc entry='title' pause='inf'>\n"
" <pre>\n"
- // Initialise the current location if it is not set
- // (all general registers are initially 0).
+ // Set a default target location if none is set.
+ // This covers first play and use of the "top menu"
+ // button.
" if (g1 eq 0)\n"
" g1 = " << 1 + button_mult << ";\n";
}
" <pre>\n";
}
- // When a title finishes or the user presses the menu
+ // 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
menu_incr != 0;
menu_incr /= 2)
{
- if (menu_index + menu_incr < contents.menus.size()
+ if (menu_index + menu_incr < menus_.size()
&& (menu_index & (menu_incr * 2 - 1)) == 0)
{
file <<
file <<
// Highlight the appropriate button.
" s8 = g1 & " << button_mask << ";\n"
+ // Forget the link target. If we don't do this, pressing
+ // the "top menu" button will result in jumping back to
+ // this same menu!
+ " g1 = 0;\n"
" </pre>\n"
- " <vob file='" << menu.vob_temp->get_name() << "'/>\n";
+ " <vob file='" << this_menu.vob_temp->get_name() << "'/>\n";
for (unsigned button_index = 0;
- button_index != menu.entries.size();
+ button_index != this_menu.entries.size();
++button_index)
{
- const dvd_contents::pgc_ref & target =
- menu.entries[button_index];
+ const pgc_ref & target = this_menu.entries[button_index].target;
file << " <button> ";
- if (target.type == dvd_contents::menu_pgc)
+ if (target.type == menu_pgc)
{
unsigned target_button_num;
// 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_index);
+ 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 != 0
- && (target_menu_entries[target_button_num - 1]
+ while (target_button_num != 1
+ && (target_menu_entries[target_button_num - 1].target
!= this_pgc))
--target_button_num;
}
}
else
{
- assert(target.type == dvd_contents::title_pgc);
+ assert(target.type == title_pgc);
file <<
- // Record current menu location (g1 specifies this
- // menu but not necessarily this button).
- "g1 = " << (1 + menu_index
+ // Record current menu location.
+ "g2 = " << (1 + menu_index
+ (1 + button_index) * button_mult) << "; "
// Set target chapter number.
"g3 = " << target.sub_index << "; "
file <<
" </menus>\n"
- " </vmgm>\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_index = 0;
- title_index != contents.titles.size();
- ++title_index)
+ title_index != titles_.size();
+ ++title_index)
{
- file <<
+ file <<
" <titleset>\n"
- // Generate a dummy menu so that the menu button on the
- // remote control will work.
+ // Generate a dummy menu so that the "menu" button will
+ // work. This returns to the source menu via the title
+ // menu.
" <menus>\n"
" <pgc entry='root'>\n"
- " <pre> jump vmgm menu; </pre>\n"
+ " <pre> g1 = g2; jump vmgm menu; </pre>\n"
" </pgc>\n"
" </menus>\n"
" <titles>\n"
" <pgc>\n"
- " <pre>\n"
- // Record calling location.
- " g2 = g1;\n";
+ " <pre>\n";
// Count chapters in the title.
unsigned n_chapters = 0;
for (vob_list::const_iterator
- it = contents.titles[title_index].begin(),
- end = contents.titles[title_index].end();
+ it = titles_[title_index].begin(),
+ end = titles_[title_index].end();
it != end;
++it)
{
" </pre>\n";
for (vob_list::const_iterator
- it = contents.titles[title_index].begin(),
- end = contents.titles[title_index].end();
+ it = titles_[title_index].begin(),
+ end = titles_[title_index].end();
it != end;
++it)
{
file <<
" <post>\n"
- // If the menu location has not been changed during
- // the title, set the location to be the following
- // button in the menu.
- " if (g1 eq g2)\n"
- " g1 = g1 + " << button_mult << ";\n"
- // In any case, return to some menu.
+ // Return to the source menu, but highlight the next button.
+ " g2 = g2 + " << button_mult << ";\n"
" call menu;\n"
" </post>\n"
" </pgc>\n"
projects / videolink.git / blobdiff