return result;
}
+
+ std::string xml_escape(const std::string & str)
+ {
+ std::string result;
+ std::size_t begin = 0;
+
+ for (;;)
+ {
+ std::size_t end = str.find_first_of("\"&'<>", begin);
+ result.append(str, begin, end - begin);
+ if (end == std::string::npos)
+ return result;
+
+ const char * entity = NULL;
+ switch (str[end])
+ {
+ case '"': entity = """; break;
+ case '&': entity = "&"; break;
+ case '\'': entity = "'"; break;
+ case '<': entity = "<"; break;
+ case '>': entity = ">"; break;
+ }
+ assert(entity);
+ result.append(entity);
+
+ begin = end + 1;
+ }
+ }
+
+
struct dvd_contents
{
- enum pgc_type { menu_pgc, title_pgc };
- typedef std::pair<pgc_type, int> pgc_ref;
+ 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
{
std::vector<title> titles;
};
+ void generate_dvd(const dvd_contents & contents,
+ const std::string & output_dir);
+
class webdvd_window : public Gtk::Window
{
public:
dvd_contents::pgc_ref add_title(const std::string & uri);
void load_next_page();
void on_net_state_change(const char * uri, gint flags, guint status);
+ bool browser_is_busy() const
+ {
+ return pending_window_update_ || pending_req_count_;
+ }
bool process_page();
void save_screenshot();
void process_links(nsIPresShell * pres_shell,
nsIPresContext * pres_context,
nsIDOMWindow * dom_window);
- void generate_dvd();
video::frame_params frame_params_;
std::string output_dir_;
filename + " is missing or not a regular file");
vob_list
.append("<vob file='")
- // FIXME: Should XML-escape the path
- .append(filename)
+ .append(xml_escape(filename))
.append("'/>\n");
}
else
pending_window_update_ = false;
}
- if (pending_req_count_ == 0 && !pending_window_update_)
+ if (!browser_is_busy())
{
try
{
std::cerr << ": " << e.what() << "\n";
Gtk::Main::quit();
}
+ catch (Glib::Exception & e)
+ {
+ std::cerr << "Fatal error";
+ if (!page_queue_.empty())
+ std::cerr << " while processing <" << page_queue_.front()
+ << ">";
+ std::cerr << ": " << e.what() << "\n";
+ Gtk::Main::quit();
+ }
}
}
// Might need to wait a while for things to load or more
// likely for a re-layout.
- if (pending_req_count_ > 0)
+ if (browser_is_busy())
return true;
}
page_queue_.pop();
if (page_queue_.empty())
{
- generate_dvd();
+ generate_dvd(contents_, output_dir_);
return false;
}
else
temp_file links_temp;
- int link_num;
+ unsigned link_num;
link_iterator links_it, links_end;
rectangle link_rect;
0, 0, frame_params_.width, frame_params_.height
};
- int menu_num = resource_map_[page_queue_.front()].second;
+ unsigned menu_num = resource_map_[page_queue_.front()].index;
for (/* no initialisation */;
state->links_it != state->links_end;
{
nsCOMPtr<nsIDOMNode> node(*state->links_it);
- // Find the link URI.
+ // Find the link URI and separate any fragment from it.
nsCOMPtr<nsILink> link(do_QueryInterface(node));
assert(link);
- nsCOMPtr<nsIURI> uri;
- check(link->GetHrefURI(getter_AddRefs(uri)));
- std::string uri_string;
+ nsCOMPtr<nsIURI> uri_iface;
+ check(link->GetHrefURI(getter_AddRefs(uri_iface)));
+ std::string uri_and_fragment, uri, fragment;
{
- nsCString uri_ns_string;
- check(uri->GetSpec(uri_ns_string));
- uri_string.assign(uri_ns_string.BeginReading(),
- uri_ns_string.EndReading());
+ nsCString uri_and_fragment_ns;
+ check(uri_iface->GetSpec(uri_and_fragment_ns));
+ uri_and_fragment.assign(uri_and_fragment_ns.BeginReading(),
+ uri_and_fragment_ns.EndReading());
+
+ std::size_t hash_pos = uri_and_fragment.find('#');
+ uri.assign(uri_and_fragment, 0, hash_pos);
+ if (hash_pos != std::string::npos)
+ fragment.assign(uri_and_fragment,
+ hash_pos + 1, std::string::npos);
}
- std::string uri_sans_fragment(uri_string, 0, uri_string.find('#'));
// Is this a new link?
if (!state->link_changing)
if (state->link_rect.empty())
{
std::cerr << "Ignoring invisible link to "
- << uri_string << "\n";
+ << uri_and_fragment << "\n";
continue;
}
++state->link_num;
- if (state->link_num >= dvd::menu_buttons_max)
+ if (state->link_num >= unsigned(dvd::menu_buttons_max))
{
- if (state->link_num == dvd::menu_buttons_max)
+ if (state->link_num == unsigned(dvd::menu_buttons_max))
std::cerr << "No more than " << dvd::menu_buttons_max
<< " buttons can be placed on a menu\n";
- std::cerr << "Ignoring link to " << uri_string << "\n";
+ std::cerr << "Ignoring link to " << uri_and_fragment
+ << "\n";
continue;
}
// Check whether this is a link to a video or a page then
// add it to the known resources if not already seen; then
// add it to the menu entries.
- nsCString path;
- check(uri->GetPath(path));
- dvd_contents::pgc_ref dest_pgc;
+ dvd_contents::pgc_ref target;
// FIXME: This is a bit of a hack. Perhaps we could decide
// later based on the MIME type determined by Mozilla?
- if ((path.Length() > 4
- && std::strcmp(path.EndReading() - 4, ".vob") == 0)
- || (path.Length() > 8
- && std::strcmp(path.EndReading() - 8, ".voblist")
- == 0))
+ if ((uri.size() > 4
+ && uri.compare(uri.size() - 4, 4, ".vob") == 0)
+ || (uri.size() > 8
+ && uri.compare(uri.size() - 8, 8, ".voblist") == 0))
{
PRBool is_file;
- check(uri->SchemeIs("file", &is_file));
+ check(uri_iface->SchemeIs("file", &is_file));
if (!is_file)
{
std::cerr << "Links to video must use the file:"
<< " scheme\n";
continue;
}
- dest_pgc = add_title(uri_sans_fragment);
+ target = add_title(uri);
+ target.sub_index =
+ std::strtoul(fragment.c_str(), NULL, 10);
}
else
{
- dest_pgc = add_menu(uri_sans_fragment);
+ target = add_menu(uri);
+ // TODO: If there's a fragment, work out which button
+ // is closest and set target.sub_index.
}
- contents_.menus[menu_num].entries.push_back(dest_pgc);
+ contents_.menus[menu_num].entries.push_back(target);
nsCOMPtr<nsIContent> content(do_QueryInterface(node));
assert(content);
// We may have to exit and wait for image loading
// to complete, at which point we will be called
// again.
- if (pending_req_count_ > 0)
+ if (browser_is_busy())
{
state->link_changing = true;
page_state_ = state;
}
}
- void generate_menu_dispatch(std::ostream &, int indent,
- int first_menu, int last_menu);
-
- void webdvd_window::generate_dvd()
+ void generate_dvd(const dvd_contents & contents,
+ const std::string & output_dir)
{
temp_file temp("webdvd-dvdauthor-");
temp.close();
// We generate code that uses registers in the following way:
//
- // g0: button destination (when jumping to menu 1), then scratch
+ // g0: scratch
// g1: current location
- // g2-g11: location history (g2 = most recent)
- // g12: location that last linked to a video
+ // 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
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;
- static const int location_bias = button_mult + 1;
file <<
"<dvdauthor>\n"
" <vmgm>\n"
" <menus>\n";
- for (std::size_t menu_num = 0;
- menu_num != contents_.menus.size();
+ for (unsigned menu_num = 0;
+ menu_num != contents.menus.size();
++menu_num)
{
- dvd_contents::menu & menu = contents_.menus[menu_num];
+ const dvd_contents::menu & menu = contents.menus[menu_num];
if (menu_num == 0)
{
- // This is the first (title) menu, which needs to include
- // initialisation and dispatch code.
-
+ // This is the first (title) menu, displayed when the
+ // disc is first played.
file <<
" <pgc entry='title'>\n"
" <pre>\n"
- // Has the location been set yet?
+ // Initialise the current location if it is not set
+ // (all general registers are initially 0).
" if (g1 eq 0)\n"
- " {\n"
- // Initialise the current location to first button on
- // this menu.
- " g1 = " << location_bias << ";\n"
- " }\n"
- " else\n"
- " {\n"
- // Has the user selected a link?
- " if (g0 ne 0)\n"
- " {\n"
- // First update the history.
- // Does link go to the last page in the history?
- " if (((g0 ^ g2) & " << menu_mask
- << ") == 0)\n"
- // It does; we treat this as going back and pop the old
- // location off the history stack into the current
- // location. Clear the free stack slot.
- " {\n"
- " g1 = g2; g2 = g3; g3 = g4; g4 = g5;\n"
- " g5 = g6; g6 = g7; g7 = g8; g8 = g9;\n"
- " g9 = g10; g10 = g11; g11 = 0;\n"
- " }\n"
- " else\n"
- // Link goes to some other page, so push current
- // location onto the history stack and set the current
- // location to be exactly the target location.
- " {\n"
- " g11 = g10; g10 = g9; g9 = g8; g8 = g7;\n"
- " g7 = g6; g6 = g5; g5 = g4; g4 = g3;\n"
- " g3 = g2; g2 = g1; g1 = g0;\n"
- " }\n"
- " }\n"
- // Find the target page number.
- " g0 = g1 & " << menu_mask << ";\n";
- // There seems to be no way to perform a computed jump,
- // so we generate all possible jumps and a binary search
- // to select the correct one.
- generate_menu_dispatch(file, 12,
- 0, contents_.menus.size() - 1);
- file <<
- " }\n";
+ " g1 = " << 1 + button_mult << ";\n";
}
- else // menu_num != 0
+ 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 <<
- // Clear link indicator and highlight the
- // appropriate link/button.
- " g0 = 0; s8 = g1 & " << button_mask << ";\n"
+ // Highlight the appropriate button.
+ " s8 = g1 & " << button_mask << ";\n"
" </pre>\n"
- " <vob file='"
- << menu.vob_temp->get_name() << "'/>\n";
+ " <vob file='" << menu.vob_temp->get_name() << "'/>\n";
- for (std::size_t button_num = 0;
+ for (unsigned button_num = 0;
button_num != menu.entries.size();
++button_num)
{
- file << " <button> "
- // Update current location.
- " g1 = "
- << location_bias + button_num * button_mult + menu_num
- << ";";
-
- // Jump to appropriate resource.
- if (menu.entries[button_num].first == dvd_contents::menu_pgc)
+ const dvd_contents::pgc_ref & target =
+ menu.entries[button_num];
+
+ file << " <button> ";
+
+ if (target.type == dvd_contents::menu_pgc)
{
- file << " g0 = "
- << location_bias + menu.entries[button_num].second
- << "; jump menu 1;";
+ 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))
+ ;
+ }
+
+ file << "g1 = "
+ << (1 + target.index
+ + (1 + target_button_num) * button_mult)
+ << "; jump menu " << 1 + target.index << ";";
}
else
{
- assert(menu.entries[button_num].first
- == dvd_contents::title_pgc);
- file << " jump title "
- << 1 + menu.entries[button_num].second << ";";
+ 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";
// Generate a titleset for each title. This appears to make
// jumping to titles a whole lot simpler (but limits us to 99
// titles).
- for (std::size_t title_num = 0;
- title_num != contents_.titles.size();
+ for (unsigned title_num = 0;
+ title_num != contents.titles.size();
++title_num)
{
file <<
" </menus>\n"
" <titles>\n"
" <pgc>\n"
- // Record calling page/menu.
+ // Record calling location.
" <pre> g12 = g1; </pre>\n"
- << contents_.titles[title_num].vob_list <<
- // If page/menu location has not been changed during the
- // video, change the location to be the following
- // link/button when returning to it. In any case,
- // return to a page/menu.
+ << 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"
{
const char * argv[] = {
"dvdauthor",
- "-o", output_dir_.c_str(),
+ "-o", output_dir.c_str(),
"-x", temp.get_name().c_str(),
0
};
}
}
- void generate_menu_dispatch(std::ostream & file, int indent,
- int first_menu, int last_menu)
- {
- if (first_menu == last_menu)
- {
- if (first_menu == 0)
- {
- // This dispatch code is generated *on* the first menu
- // so don't create an infinite loop.
- }
- else
- {
- file << std::setw(indent) << ""
- << "jump menu " << 1 + first_menu << ";\n";
- }
- }
- else // first_menu != last_menu
- {
- if (first_menu == 0 && last_menu == 1)
- {
- // dvdauthor doesn't allow empty blocks or null
- // statements so when selecting between the first 2
- // menus we don't use an "else" part. We must use
- // braces so that a following "else" will match the
- // right "if".
- file << std::setw(indent) << "" << "{\n"
- << std::setw(indent) << "" << "if (g0 eq 2)\n"
- << std::setw(indent + 2) << "" << "jump menu 2;\n"
- << std::setw(indent) << "" << "}\n";
- }
- else
- {
- int middle = (first_menu + last_menu) / 2;
- file << std::setw(indent) << "" << "if (g0 le " << 1 + middle
- << ")\n";
- generate_menu_dispatch(file, indent + 2,
- first_menu, middle);
- file << std::setw(indent) << "" << "else\n";
- generate_menu_dispatch(file, indent + 2,
- middle + 1, last_menu);
- }
- }
- }
-
const video::frame_params & lookup_frame_params(const char * str)
{
assert(str);
void set_browser_preferences()
{
- // Disable IE-compatibility kluge that causes backgrounds to
- // sometimes/usually be missing from snapshots. This is only
- // effective from Mozilla 1.8 onward.
-# if MOZ_VERSION_MAJOR > 1 \
- || (MOZ_VERSION_MAJOR == 1 && MOZ_VERSION_MINOR >= 8)
nsCOMPtr<nsIPrefService> pref_service;
static const nsCID pref_service_cid = NS_PREFSERVICE_CID;
check(CallGetService<nsIPrefService>(pref_service_cid,
getter_AddRefs(pref_service)));
nsCOMPtr<nsIPrefBranch> pref_branch;
+
+ // Disable IE-compatibility kluge that causes backgrounds to
+ // sometimes/usually be missing from snapshots. This is only
+ // effective from Mozilla 1.8 onward.
+# if MOZ_VERSION_MAJOR > 1 \
+ || (MOZ_VERSION_MAJOR == 1 && MOZ_VERSION_MINOR >= 8)
check(pref_service->GetDefaultBranch("layout",
getter_AddRefs(pref_branch)));
check(pref_branch->SetBoolPref(
true));
# endif
- // TODO: Set display resolution? Unfortunately Mozilla doesn't
- // support non-square pixels (and neither do fontconfig or Xft
- // anyway).
+ // Set display resolution. With standard-definition video we
+ // will be fitting ~600 pixels across a screen typically
+ // ranging from 10 to 25 inches wide, for a resolution of
+ // 24-60 dpi. I therefore declare the average horizontal
+ // resolution to be 40 dpi. The vertical resolution will be
+ // slightly higher (PAL/SECAM) or lower (NTSC), but
+ // unfortunately Mozilla doesn't support non-square pixels
+ // (and neither do fontconfig or Xft anyway).
+ check(pref_service->GetDefaultBranch("browser.display",
+ getter_AddRefs(pref_branch)));
+ check(pref_branch->SetIntPref("screen_resolution", 40));
}
} // namespace