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authorTim Redfern <tim@eclectronics.org>2014-02-17 13:36:38 +0000
committerTim Redfern <tim@eclectronics.org>2014-02-17 13:36:38 +0000
commit22e28216336da876e1fd17f380ce42eaf1446769 (patch)
tree444dad3dc7e2656992d29f34f7bce31970c122a5 /ffmpeg/tools/make_chlayout_test
parentae5e8541f6e06e64c28719467cdf366ac57aff31 (diff)
chasing indexing error
Diffstat (limited to 'ffmpeg/tools/make_chlayout_test')
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diff --git a/ffmpeg/tools/make_chlayout_test b/ffmpeg/tools/make_chlayout_test
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-#!/usr/bin/env perl
-
-# Copyright (c) 2012 Nicolas George
-#
-# This file is part of FFmpeg.
-#
-# FFmpeg is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# FFmpeg is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-
-=head1 NAME
-
-make_chlayout_test - produce a multichannel test file with the channels
-clearly identified
-
-=head1 SYNOPSIS
-
-tools/make_chlayout_test I<channels> I<out_options>
-
-=head1 DESCRIPTION
-
-This script uses B<ffmpeg> and B<libflite> to produce a file with audio
-channels clearly identified by their name. The resulting file can be used to
-check that the layout and order of channels is correctly handled by a piece
-of software, either a part of B<FFmpeg> or not.
-
-I<channels> is a list of channels or channel layouts, separated by '+'.
-
-I<out_options> is a list of valid ffmpeg outout options, including the
-output file.
-
-Note that some output codecs or formats can not handle arbitrary channel
-layout.
-
-This script requires a B<ffmpeg> binary, either in the source tree or in the
-search path; it must have the flite audio source enabled.
-
-=head1 EXAMPLES
-
-Check that the speakers are correctly plugged:
-
- tools/make_chlayout_test FL+FR -f alsa default
-
-Produce a 5.1 FLAC file:
-
- tools/make_chlayout_test 5.1 surround.flac
-
-=cut
-
-use strict;
-use warnings;
-use Getopt::Long ":config" => "require_order";
-use Pod::Usage;
-
-GetOptions (
- "help|usage|?|h" => sub { pod2usage({ -verbose => 1, -exitval => 0 }) },
- "manpage|m" => sub { pod2usage({ -verbose => 2, -exitval => 0 }) },
-) and @ARGV >= 2 or pod2usage({ -verbose => 1, -exitval => 1 });
-
-my $channels = shift @ARGV;
-my @out_options = @ARGV;
-
-my $ffmpeg = exists $ENV{FFMPEG} ? $ENV{FFMPEG} :
- $0 =~ /(.*)\// && -e "$1/../ffmpeg" ? "$1/../ffmpeg" :
- "ffmpeg";
-
-my %channel_label_to_descr;
-my %layout_to_channels;
-
-{
- open my $stderr, ">&STDERR";
- open STDERR, ">", "/dev/null";
- open my $f, "-|", $ffmpeg, "-layouts" or die "$ffmpeg: $!\n";
- open STDERR, ">&", $stderr;
- while (<$f>) {
- chomp;
- next if /^NAME/ or /:$/ or /^$/; # skip headings
- my ($name, $descr) = split " ", $_, 2;
- next unless $descr;
- if ($descr =~ /^[[:upper:]]+(?:\+[[:upper:]]+)*$/) {
- $layout_to_channels{$name} = [ split /\+/, $descr ];
- } else {
- $channel_label_to_descr{$name} = $descr;
- }
- }
-}
-
-my @channels = map { @{$layout_to_channels{$_} // [$_]} } split /\+/, $channels;
-
-my $layout = join "+", @channels;
-my $graph = "";
-my $concat_in = "";
-for my $i (0 .. $#channels) {
- my $label = $channels[$i];
- my $descr = $channel_label_to_descr{$label}
- or die "Channel $label not found\n";
- $graph .= "flite=text='${descr}', aformat=channel_layouts=mono, " .
- "pan=${layout}:${label}=c0 [ch$i] ;\n";
- $concat_in .= "[ch$i] ";
-}
-$graph .= "${concat_in}concat=v=0:a=1:n=" . scalar(@channels);
-
-exec $ffmpeg, "-f", "lavfi", "-i", $graph, @out_options
- or die "$ffmpeg: $!\n";