#!/usr/bin/php
<?php

/*******************************************************************************
* mpc2mp3.php - Converts a Musepack file to an MP3 file                        *
********************************************************************************
* filename        mpc2mp3.php                                                  *
* author          Richard Vrijhof <R.J.Vrijhof@bigfoot.com>                    *
* version         0.1                                                          *
* date            December 10, 2005                                            *
* dependencies    -PHP 4.1.0                                                   *
*                 -getID3 library (http://www.getid3.org/)                     *
********************************************************************************
*                                                                              *
*                                ***************                               *
*                                * ERRORLEVELS *                               *
*                                ***************                               *
*                                                                              *
* 0   Everything fine                                                          *
* 1   No parameter given or more than one parameter                            *
* 2   File not found                                                           *
* 3   File is not an MPC file                                                  *
* 4   Error decoding to wave file                                              *
* 5   Error encoding to MP3 file                                               *
*******************************************************************************/

// This lib does wonders... "Terrific!" in one word.
require_once("getid3.php");

echo basename($_SERVER[argv][0]) . " - Converts an MPC file to MP3\n\n";

// Check for parameter (only one allowed: the path to an MP3 file).
if ($_SERVER[argc] != 2) {
  echo "FATAL ERROR: no path to an MPC file given! Exiting.\n";
  exit(1);
}

// Check whether file exists.
if (! file_exists($_SERVER[argv][1])) {
  echo "FATAL ERROR: file \"" . $_SERVER[argv][1] . "\" not found! Exiting.\n";
  exit(2);
}

$id3 = new getID3;

getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'write.php', __FILE__, true);

// Now, do your magic.
$info = $id3->analyze($_SERVER[argv][1]);

// Check for MPC file.
if ($info[audio][dataformat] != "mac") {
  echo "FATAL ERROR: \"" . $info[filename] . "\" is not an MPC file! ";
  echo "Exiting.\n";
  exit(3);
}

$sans_ext = substr($info[filename], 0, -4);

// Decode to wave file.
echo "Decoding MPC file to a WAVE file. Please wait...";
exec(
  "mppdec " . escapeshellarg($info[filename]) . " " . escapeshellarg($sans_ext) .
  ".wav 2>&1 >/dev/null",
  $output,
  $return_var
);
echo "done.\n";

// Decoding has gone wrong. Clean up the mess and exit.
if ($return_var > 0) {
  echo "FATAL ERROR: decoding \"" . $info[filename] . "\" has failed! ";
  echo "Exiting.\n";
  // Clean up.
  if (file_exists("$sans_ext.wav")) {
    unlink("$sans_ext.wav");
  }
  exit(4);
}

// Encode to an MP3 320 kbps CBR file.
echo "Encoding to a 320 kbps CBR MP3 file. Please wait...";
exec(
  "lame -S --cbr -b 320 -h -m s " . escapeshellarg("$sans_ext.wav") . " " .
  escapeshellarg("$sans_ext.mp3") .  " 2>&1 >/dev/null",
  $output,
  $return_var
);
echo "done.\n";

// Encoding has gone wrong. Clean up the mess and exit.
if ($return_var > 0) {
  echo "FATAL ERROR: encoding \"$sans_ext.wav\" has failed! Exiting.\n";
  // Clean up.
  if (file_exists("$sans_ext.wav")) {
    unlink("$sans_ext.wav");
  }
  if (file_exists("$sans_ext.mp3")) {
    unlink("$sans_ext.mp3");
  }
  exit(5);
}

// Clean up.
if (file_exists("$sans_ext.wav")) {
  unlink("$sans_ext.wav");
}

// Write ID3 tags to MP3 file.
getid3_lib::CopyTagsToComments($info);
if (
  $info[comments][artist][0] != "" ||
  $info[comments][title][0] != "" ||
  $info[comments][album][0] != "" ||
  $info[comments][year][0] != "" ||
  $info[comments][track][0] != "" ||
  $info[comments][genre][0] != "" ||
  $info[comments][totaltracks][0] != "" ||
  $info[comments][tracknum][0] != ""
) {
  echo "Writing ID3 tags to MP3 file. Please wait...";
  $tagwriter = new getid3_writetags;
  $tagwriter->filename = "$sans_ext.mp3";
  $tagwriter->tagformats = array("id3v1", "id3v2.4");
  $tagwriter->remove_other_tags = true;
  $tagdata = array(array());
  if ($info[comments][artist][0] != "") {
    $tagdata[ARTIST][0] = $info[comments][artist][0];
  }
  if ($info[comments][title][0] != "") {
    $tagdata[TITLE][0] = $info[comments][title][0];
  }
  if ($info[comments][album][0] != "") {
    $tagdata[ALBUM][0] = $info[comments][album][0];
  }
  if ($info[comments][year][0] != "") {
    $tagdata[YEAR][0] = $info[comments][year][0];
  }
  if ($info[comments][track][0] != "") {
    $tagdata[TRACK][0] = $info[comments][track][0];
  }
  if ($info[comments][genre][0] != "") {
    $tagdata[GENRE][0] = $info[comments][genre][0];
  }
  if ($info[comments][totaltracks][0] != "") {
    $tagdata[TOTALTRACKS][0] = $info[comments][totaltracks][0];
  }
  if ($info[comments][tracknum][0] != "") {
    $tagdata[TRACKNUMBER][0] = $info[comments][tracknum][0];
  }
  $tagwriter->tag_data = $tagdata;
  if ($tagwriter->WriteTags()) {
    if (! empty($tagwriter->warnings)) {
      echo "done.\nSome warnings have arisen while writing the ID3 tags.\nThey";
      echo " were:\n" . implode("\n", $tagwriter->warnings) . "\n";
    } else {
      echo "done.\nSuccessfully converted \"" . $info[filename] . "\" to an ";
      echo "MP3 file.\n";
    }
  } else {
    echo "done.\nError writing ID3 tags to the MP3 file. Keeping MP3 file\n";
    echo "though.\n";
  }
} else {
  echo "Successfully converted \"" . $info[filename] . "\" to an MP3 file.\n";
}

?>