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MPV.pm  view on Meta::CPAN

   my ($class, %kv) = @_;

   bless {
      mpv     => "mpv",
      args    => [],
      %kv,
   }, $class
}

=item $string = $mpv->escape_binary ($string)

This module excects all command data sent to F<mpv> to be in unicode. Some
things are not, such as filenames. To pass binary data such as filenames
through a comamnd, you need to escape it using this method.

The simplest example is a C<loadfile> command:

   $mpv->cmd_recv (loadfile => $mpv->escape_binary ($path));

=cut

# can be used to escape filenames
sub escape_binary {
   shift;
   local $_ = shift;
   # we escape every "illegal" octet using U+10e5df HEX. this is later undone in cmd
   s/([\x00-\x1f\x80-\xff])/sprintf "\x{10e5df}%02x", ord $1/ge;
   $_
}

=item $started = $mpv->start (argument...)

Starts F<mpv>, passing the given arguemnts as extra arguments to
F<mpv>. If F<mpv> is already running, it returns false, otherwise it
returns a true value, so you can easily start F<mpv> on demand by calling
C<start> just before using it, and if it is already running, it will not
be started again.

The arguments passwd to F<mpv> are a set of hardcoded built-in arguments,
followed by the arguments specified in the constructor, followed by the
arguments passwd to this method. The built-in arguments currently are
F<--no-input-terminal>, F<--really-quiet> (or F<--quiet> in C<trace>
mode), and C<--input-ipc-client> (or equivalent).

Some commonly used and/or even useful arguments you might want to pass are:

=over

=item F<--idle=yes> or F<--idle=once> to keep F<mpv> from quitting when you
don't specify a file to play.

=item F<--pause>, to keep F<mpv> from instantly starting to play a file, in case you want to
inspect/change properties first.

=item F<--force-window=no> (or similar), to keep F<mpv> from instantly opening a window, or to force it to do so.

=item F<--audio-client-name=yourappname>, to make sure audio streams are associated witht eh right program.

=item F<--wid=id>, to embed F<mpv> into another application.

=item F<--no-terminal>, F<--no-input-default-bindings>, F<--no-input-cursor>, F<--input-conf=/dev/null>, F<--input-vo-keyboard=no> - to ensure only you control input.

=back

The return value can be used to decide whether F<mpv> needs initializing:

   if ($mpv->start) {
      $mpv->bind_key (...);
      $mpv->cmd (set => property => value);
      ...
   }

You can immediately starting sending commands when this method returns,
even if F<mpv> has not yet started.

=cut

sub start {
   my ($self, @extra_args) = @_;

   return 0 if $self->{fh};

   # cache optionlist for same "path"
   ($mpv_path, $mpv_optionlist) = ($self->{mpv}, scalar qx{\Q$self->{mpv}\E --list-options})
      if $self->{mpv} ne $mpv_path;

   my $options = $mpv_optionlist;

   my ($fh, $slave) = AnyEvent::Util::portable_socketpair
      or die "socketpair: $!\n";

   AnyEvent::Util::fh_nonblocking $fh, 1;

   $self->{pid} = fork;

   if ($self->{pid} eq 0) {
      AnyEvent::Util::fh_nonblocking $slave, 0;
      fcntl $slave, Fcntl::F_SETFD, 0;

      my $input_file = $options =~ /\s--input-ipc-client\s/ ? "input-ipc-client" : "input-file";

      exec $self->{mpv},
           qw(--no-input-terminal),
           ($self->{trace} ? "--quiet" : "--really-quiet"),
           "--$input_file=fd://" . (fileno $slave),
           @{ $self->{args} },
           @extra_args;
      exit 1;
   }

   $self->{fh} = $fh;

   my $trace = $self->{trace} || sub { };

   $trace = sub { warn "$_[0] $_[1]\n" } if $trace && !ref $trace;

   my $buf;

   Scalar::Util::weaken $self;

   $self->{rw} = AE::io $fh, 0, sub {

MPV.pm  view on Meta::CPAN

   while ($oid > 100) {
      $mpv->cmd ("unobserve_property", $oid--);
   }

   $PLAYING_STATE->{curpos} = $mpv->cmd_recv ("get_property", "playback-time");

And thats most of the F<mpv>-related code.

=head2 F<Gtk2::CV>

F<Gtk2::CV> is low-feature image viewer that I use many times daily
because it can handle directories with millions of files without falling
over. It also had the ability to play videos for ages, but it used an
older, crappier protocol to talk to F<mpv> and used F<ffprobe> before
playing each file instead of letting F<mpv> handle format/size detection.

After writing this module, I decided to upgprade Gtk2::CV by making use
of it, with the goal of getting rid of F<ffprobe> and being ablew to
reuse F<mpv> processes, which would have a multitude of speed benefits
(for example, fork+exec of F<mpv> caused the kernel to close all file
descriptors, which could take minutes if a large file was being copied via
NFS, as the kernel waited for thr buffers to be flushed on close - not
having to start F<mpv> gets rid of this issue).

Setting up is only complicated by the fact that F<mpv> needs to be
embedded into an existing window. To keep control of all inputs,
F<Gtk2::CV> puts an eventbox in front of F<mpv>, so F<mpv> receives no
input events:

   $self->{mpv} = AnyEvent::MPV->new (
      trace => $ENV{CV_MPV_TRACE},
   );

   # create an eventbox, so we receive all input events
   my $box = $self->{mpv_eventbox} = new Gtk2::EventBox;
   $box->set_above_child (1);
   $box->set_visible_window (0);
   $box->set_events ([]);
   $box->can_focus (0);

   # create a drawingarea that mpv can display into
   my $window = $self->{mpv_window} = new Gtk2::DrawingArea;
   $box->add ($window);

   # put the drawingarea intot he eventbox, and the eventbox into our display window
   $self->add ($box);

   # we need to pass the window id to F<mpv>, which means we need to realise
   # the drawingarea, so an X window is allocated for it.
   $self->show_all;
   $window->realize;
   my $xid = $window->window->get_xid;

Then it starts F<mpv> using this setup:

   local $ENV{LC_ALL} = "POSIX";
   $self->{mpv}->start (
      "--no-terminal",
      "--no-input-terminal",
      "--no-input-default-bindings",
      "--no-input-cursor",
      "--input-conf=/dev/null",
      "--input-vo-keyboard=no",

      "--loop-file=inf",
      "--force-window=yes",
      "--idle=yes",

      "--audio-client-name=CV",

      "--osc=yes", # --osc=no displays fading play/pause buttons instead

      "--wid=$xid",
   );

   $self->{mpv}->cmd ("script-message" => "osc-visibility" => "never", "dummy");
   $self->{mpv}->cmd ("osc-idlescreen" => "no");

It also prepares a hack to force a ConfigureNotify event on every vidoe
reconfig:

   # force a configurenotify on every video-reconfig
   $self->{mpv_reconfig} = $self->{mpv}->register_event (video_reconfig => sub {
      my ($mpv, $event, $data) = @_;

      $self->mpv_window_update;
   });

The way this is done is by doing a "dummy" resize to 1x1 and back:

   $self->{mpv_window}->window->resize (1, 1),
   $self->{mpv_window}->window->resize ($self->{w}, $self->{h});

Without this, F<mpv> often doesn't "get" the correct window size. Doing
it this way is not nice, but I didn't fine a nicer way to do it.

When no file is being played, F<mpv> is hidden and prepared:

   $self->{mpv_eventbox}->hide;

   $self->{mpv}->cmd (set_property => "pause" => "yes");
   $self->{mpv}->cmd ("playlist_remove", "current");
   $self->{mpv}->cmd (set_property => "video-rotate" => 0);
   $self->{mpv}->cmd (set_property => "lavfi-complex" => "");

Loading a file is a bit more complicated, as bluray and DVD rips are
supported:

   if ($moviedir) {
      if ($moviedir eq "br") {
         $mpv->cmd (set => "bluray-device" => $path);
         $mpv->cmd (loadfile => "bd://");
      } elsif ($moviedir eq "dvd") {
         $mpv->cmd (set => "dvd-device" => $path);
         $mpv->cmd (loadfile => "dvd://");
      }
   } elsif ($type eq "video/iso-bluray") {
      $mpv->cmd (set => "bluray-device" => $path);
      $mpv->cmd (loadfile => "bd://");
   } else {
      $mpv->cmd (loadfile => $mpv->escape_binary ($path));