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=head1 NAME |
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|
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AnyEvent::MPV - remote control mpv (https://mpv.io) |
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|
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=head1 SYNOPSIS |
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|
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use AnyEvent::MPV; |
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|
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=head1 DESCRIPTION |
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|
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This module is an L<AnyEvent> user, you need to make sure that you use and |
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run a supported event loop. |
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|
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=cut |
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|
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package AnyEvent::MPV; |
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|
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use common::sense; |
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|
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use Fcntl (); |
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use Scalar::Util (); |
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|
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use AnyEvent (); |
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use AnyEvent::Util (); |
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|
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our $JSON = eval { require JSON::XS; JSON::XS:: } |
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|| do { require JSON::PP; JSON::PP:: }; |
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|
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our $VERSION = '0.1'; |
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|
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our $mpv_path; # last mpv path used |
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our $mpv_optionlist; # output of mpv --list-options |
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|
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sub new { |
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my ($class, %kv) = @_; |
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|
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bless { |
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mpv => "mpv", |
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args => [], |
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%kv, |
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}, $class |
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} |
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|
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# can be used to escape filenames |
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sub escape_binary { |
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shift; |
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local $_ = shift; |
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# we escape every "illegal" octet using U+10e5df HEX. this is later undone in cmd |
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s/([\x00-\x1f\x80-\xff])/sprintf "\x{10e5df}%02x", ord $1/ge; |
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$_ |
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} |
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|
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sub start { |
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my ($self, @extra_args) = @_; |
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|
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return if $self->{fh}; |
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|
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# cache optionlist for same "path" |
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($mpv_path, $mpv_optionlist) = ($self->{mpv}, scalar qx{\Q$self->{mpv}\E --list-options}) |
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if $self->{mpv} ne $mpv_path; |
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|
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my $options = $mpv_optionlist; |
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|
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my ($fh, $slave) = AnyEvent::Util::portable_socketpair |
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or die "socketpair: $!\n"; |
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|
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AnyEvent::Util::fh_nonblocking $fh, 1; |
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|
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$self->{pid} = fork; |
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|
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if ($self->{pid} eq 0) { |
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AnyEvent::Util::fh_nonblocking $slave, 0; |
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fcntl $slave, Fcntl::F_SETFD, 0; |
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|
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my $input_file = $options =~ /\s--input-ipc-client\s/ ? "input-ipc-client" : "input-file"; |
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|
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exec $self->{mpv}, |
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qw(--no-input-terminal --idle=yes --pause), |
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($self->{trace} ? "--quiet" : "--really-quiet"), |
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"--$input_file=fd://" . (fileno $slave), |
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@{ $self->{args} }, |
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@extra_args; |
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exit 1; |
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} |
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|
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$self->{fh} = $fh; |
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|
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my $trace = delete $self->{trace} || sub { }; |
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|
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$trace = sub { warn "$_[0] $_[1]\n" } if $trace && !ref $trace; |
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|
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my $buf; |
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my $wbuf; |
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|
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Scalar::Util::weaken $self; |
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|
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$self->{rw} = AE::io $fh, 0, sub { |
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if (sysread $fh, $buf, 8192, length $buf) { |
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while ($buf =~ s/^([^\n]+)\n//) { |
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$trace->("mpv>" => "$1"); |
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|
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if ("{" eq substr $1, 0, 1) { |
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eval { |
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my $reply = JSON::XS->new->latin1->decode ($1); |
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|
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if (exists $reply->{event}) { |
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if ( |
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$reply->{event} eq "client-message" |
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and $reply->{args}[0] eq "AnyEvent::MPV" |
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) { |
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if ($reply->{args}[1] eq "key") { |
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$self->on_key ($reply->{args}[2]); |
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} |
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} else { |
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$self->on_event ($reply); |
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} |
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} elsif (exists $reply->{request_id}) { |
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my $cv = delete $self->{cmd_cv}{$reply->{request_id}}; |
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|
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unless ($cv) { |
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warn "no cv found for request id <$reply->{request_id}>\n"; |
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next; |
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} |
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|
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if (exists $reply->{data}) { |
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$cv->send ($reply->{data}); |
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} elsif ($reply->{error} eq "success") { # success means error... eh.. no... |
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$cv->send; |
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} else { |
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$cv->croak ($reply->{error}); |
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} |
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|
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} else { |
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warn "unexpected reply from mpv, pleasew report: <$1>\n"; |
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} |
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}; |
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warn $@ if $@; |
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} else { |
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$trace->("mpv>" => "$1"); |
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} |
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} |
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} else { |
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$self->stop; |
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$self->on_eof; |
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} |
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}; |
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|
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$self->{_send} = sub { |
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$wbuf .= "$_[0]\n"; |
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|
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$trace->(">mpv" => "$_[0]"); |
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|
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$self->{ww} ||= AE::io $fh, 1, sub { |
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my $len = syswrite $fh, $wbuf; |
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substr $wbuf, 0, $len, ""; |
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undef $self->{ww} unless length $wbuf; |
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}; |
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}; |
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} |
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|
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sub on_eof { |
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my ($self) = @_; |
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|
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$self->{on_eof}($self) if $self->{on_eof}; |
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} |
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|
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sub on_event { |
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my ($self, $key) = @_; |
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|
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$self->{on_event}($self, $key) if $self->{on_event}; |
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} |
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|
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sub on_key { |
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my ($self, $key) = @_; |
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|
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$self->{on_key}($self, $key) if $self->{on_key}; |
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} |
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|
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sub cmd { |
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my ($self, @cmd) = @_; |
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|
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my $cv = AE::cv; |
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|
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my $reqid = ++$self->{reqid}; |
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$self->{cmd_cv}{$reqid} = $cv; |
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|
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my $cmd = JSON::XS::encode_json { command => ref $cmd[0] ? $cmd[0] : \@cmd, request_id => $reqid*1 }; |
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|
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# (un-)apply escape_binary hack |
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$cmd =~ s/\xf4\x8e\x97\x9f(..)/sprintf sprintf "\\x%02x", hex $1/ges; # f48e979f == 10e5df in utf-8 |
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|
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$self->{_send}($cmd); |
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|
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$cv |
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} |
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|
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sub stop { |
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my ($self) = @_; |
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|
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if ($self->{pid}) { |
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delete $self->{rw}; |
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delete $self->{ww}; |
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|
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close delete $self->{fh}; # current mpv versions should cleanup on their own on close |
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|
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kill TERM => $self->{pid}; |
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|
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delete $self->{pid}; |
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} |
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} |
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|
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=head1 SEE ALSO |
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|
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L<AnyEvent>. |
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|
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=head1 AUTHOR |
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|
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Marc Lehmann <schmorp@schmorp.de> |
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http://home.schmorp.de/ |
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|
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=cut |
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|
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1 |
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