module.audio-video.real.php

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				default:
					$ThisFileInfo['warning'][] = 'Unhandled RealMedia chunk "'.$ChunkName.'" at offset '.$thisfile_real_chunks_currentchunk['offset'];
					break;
			}
			$ChunkCounter++;
		}

		if (!empty($ThisFileInfo['audio']['streams'])) {
			$ThisFileInfo['audio']['bitrate'] = 0;
			foreach ($ThisFileInfo['audio']['streams'] as $key => $valuearray) {
				$ThisFileInfo['audio']['bitrate'] += $valuearray['bitrate'];
			}
		}

		return true;
	}


	function ParseOldRAheader($OldRAheaderData, &$ParsedArray) {
		// http://www.freelists.org/archives/matroska-devel/07-2003/msg00010.html

		$ParsedArray = array();
		$ParsedArray['magic'] = substr($OldRAheaderData, 0, 4);
		if ($ParsedArray['magic'] != '.ra'."\xFD") {
			return false;
		}
		$ParsedArray['version1']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData,  4, 2));

		if ($ParsedArray['version1'] < 3) {

			return false;

		} elseif ($ParsedArray['version1'] == 3) {

			$ParsedArray['fourcc1']          = '.ra3';
			$ParsedArray['bits_per_sample']  = 16;   // hard-coded for old versions?
			$ParsedArray['sample_rate']      = 8000; // hard-coded for old versions?

			$ParsedArray['header_size']      = getid3_lib::BigEndian2Int(substr($OldRAheaderData,  6, 2));
			$ParsedArray['channels']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData,  8, 2)); // always 1 (?)
			$ParsedArray['unknown1']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 10, 2));
			$ParsedArray['unknown2']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 12, 2));
			$ParsedArray['unknown3']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 14, 2));
			$ParsedArray['bytes_per_minute'] = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 16, 2));
			$ParsedArray['audio_bytes']      = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 18, 4));
			$ParsedArray['comments_raw']     =                           substr($OldRAheaderData, 22, $ParsedArray['header_size'] - 22 + 1); // not including null terminator

			$commentoffset = 0;
			$commentlength = getid3_lib::BigEndian2Int(substr($ParsedArray['comments_raw'], $commentoffset++, 1));
			$ParsedArray['comments']['title'][]     = substr($ParsedArray['comments_raw'], $commentoffset, $commentlength);
			$commentoffset += $commentlength;

			$commentlength = getid3_lib::BigEndian2Int(substr($ParsedArray['comments_raw'], $commentoffset++, 1));
			$ParsedArray['comments']['artist'][]    = substr($ParsedArray['comments_raw'], $commentoffset, $commentlength);
			$commentoffset += $commentlength;

			$commentlength = getid3_lib::BigEndian2Int(substr($ParsedArray['comments_raw'], $commentoffset++, 1));
			$ParsedArray['comments']['copyright'][] = substr($ParsedArray['comments_raw'], $commentoffset, $commentlength);
			$commentoffset += $commentlength;

			$commentoffset++; // final null terminator (?)
			$commentoffset++; // fourcc length (?) should be 4
			$ParsedArray['fourcc']           =                           substr($OldRAheaderData, 23 + $commentoffset, 4);

		} elseif ($ParsedArray['version1'] <= 5) {

			$ParsedArray['unknown1']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData,  6, 2));
			$ParsedArray['fourcc1']          =                           substr($OldRAheaderData,  8, 4);
			$ParsedArray['file_size']        = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 12, 4));
			$ParsedArray['version2']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 16, 2));
			$ParsedArray['header_size']      = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 18, 4));
			$ParsedArray['codec_flavor_id']  = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 22, 2));
			$ParsedArray['coded_frame_size'] = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 24, 4));
			$ParsedArray['audio_bytes']      = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 28, 4));
			$ParsedArray['bytes_per_minute'] = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 32, 4));
			$ParsedArray['unknown5']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 36, 4));
			$ParsedArray['sub_packet_h']     = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 40, 2));
			$ParsedArray['frame_size']       = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 42, 2));
			$ParsedArray['sub_packet_size']  = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 44, 2));
			$ParsedArray['unknown6']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 46, 2));

			switch ($ParsedArray['version1']) {

				case 4:
					$ParsedArray['sample_rate']      = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 48, 2));
					$ParsedArray['unknown8']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 50, 2));
					$ParsedArray['bits_per_sample']  = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 52, 2));
					$ParsedArray['channels']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 54, 2));
					$ParsedArray['length_fourcc2']   = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 56, 1));
					$ParsedArray['fourcc2']          =                           substr($OldRAheaderData, 57, 4);
					$ParsedArray['length_fourcc3']   = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 61, 1));
					$ParsedArray['fourcc3']          =                           substr($OldRAheaderData, 62, 4);
					$ParsedArray['unknown9']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 66, 1));
					$ParsedArray['unknown10']        = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 67, 2));
					$ParsedArray['comments_raw']     =                           substr($OldRAheaderData, 69, $ParsedArray['header_size'] - 69 + 16);

					$commentoffset = 0;
					$commentlength = getid3_lib::BigEndian2Int(substr($ParsedArray['comments_raw'], $commentoffset++, 1));
					$ParsedArray['comments']['title'][]     = substr($ParsedArray['comments_raw'], $commentoffset, $commentlength);
					$commentoffset += $commentlength;

					$commentlength = getid3_lib::BigEndian2Int(substr($ParsedArray['comments_raw'], $commentoffset++, 1));
					$ParsedArray['comments']['artist'][]    = substr($ParsedArray['comments_raw'], $commentoffset, $commentlength);
					$commentoffset += $commentlength;

					$commentlength = getid3_lib::BigEndian2Int(substr($ParsedArray['comments_raw'], $commentoffset++, 1));
					$ParsedArray['comments']['copyright'][] = substr($ParsedArray['comments_raw'], $commentoffset, $commentlength);
					$commentoffset += $commentlength;
					break;

				case 5:
					$ParsedArray['sample_rate']      = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 48, 4));
					$ParsedArray['sample_rate2']     = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 52, 4));
					$ParsedArray['bits_per_sample']  = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 56, 4));
					$ParsedArray['channels']         = getid3_lib::BigEndian2Int(substr($OldRAheaderData, 60, 2));
					$ParsedArray['genr']             =                           substr($OldRAheaderData, 62, 4);
					$ParsedArray['fourcc3']          =                           substr($OldRAheaderData, 66, 4);
					$ParsedArray['comments']         = array();
					break;
			}
			$ParsedArray['fourcc'] = $ParsedArray['fourcc3'];

		}
		foreach ($ParsedArray['comments'] as $key => $value) {
			if ($ParsedArray['comments'][$key][0] === false) {
				$ParsedArray['comments'][$key][0] = '';
			}
		}

		return true;
	}

	function RealAudioCodecFourCClookup($fourcc, $bitrate) {
		static $RealAudioCodecFourCClookup = array();
		if (empty($RealAudioCodecFourCClookup)) {
			// http://www.its.msstate.edu/net/real/reports/config/tags.stats
			// http://www.freelists.org/archives/matroska-devel/06-2003/fullthread18.html

			$RealAudioCodecFourCClookup['14_4'][8000]  = 'RealAudio v2 (14.4kbps)';
			$RealAudioCodecFourCClookup['14.4'][8000]  = 'RealAudio v2 (14.4kbps)';
			$RealAudioCodecFourCClookup['lpcJ'][8000]  = 'RealAudio v2 (14.4kbps)';
			$RealAudioCodecFourCClookup['28_8'][15200] = 'RealAudio v2 (28.8kbps)';
			$RealAudioCodecFourCClookup['28.8'][15200] = 'RealAudio v2 (28.8kbps)';
			$RealAudioCodecFourCClookup['sipr'][4933]  = 'RealAudio v4 (5kbps Voice)';
			$RealAudioCodecFourCClookup['sipr'][6444]  = 'RealAudio v4 (6.5kbps Voice)';
			$RealAudioCodecFourCClookup['sipr'][8444]  = 'RealAudio v4 (8.5kbps Voice)';
			$RealAudioCodecFourCClookup['sipr'][16000] = 'RealAudio v4 (16kbps Wideband)';
			$RealAudioCodecFourCClookup['dnet'][8000]  = 'RealAudio v3 (8kbps Music)';
			$RealAudioCodecFourCClookup['dnet'][16000] = 'RealAudio v3 (16kbps Music Low Response)';
			$RealAudioCodecFourCClookup['dnet'][15963] = 'RealAudio v3 (16kbps Music Mid/High Response)';
			$RealAudioCodecFourCClookup['dnet'][20000] = 'RealAudio v3 (20kbps Music Stereo)';
			$RealAudioCodecFourCClookup['dnet'][32000] = 'RealAudio v3 (32kbps Music Mono)';
			$RealAudioCodecFourCClookup['dnet'][31951] = 'RealAudio v3 (32kbps Music Stereo)';
			$RealAudioCodecFourCClookup['dnet'][39965] = 'RealAudio v3 (40kbps Music Mono)';
			$RealAudioCodecFourCClookup['dnet'][40000] = 'RealAudio v3 (40kbps Music Stereo)';
			$RealAudioCodecFourCClookup['dnet'][79947] = 'RealAudio v3 (80kbps Music Mono)';
			$RealAudioCodecFourCClookup['dnet'][80000] = 'RealAudio v3 (80kbps Music Stereo)';

			$RealAudioCodecFourCClookup['dnet'][0] = 'RealAudio v3';
			$RealAudioCodecFourCClookup['sipr'][0] = 'RealAudio v4';
			$RealAudioCodecFourCClookup['cook'][0] = 'RealAudio G2';
			$RealAudioCodecFourCClookup['atrc'][0] = 'RealAudio 8';
		}
		$roundbitrate = intval(round($bitrate));
		if (isset($RealAudioCodecFourCClookup[$fourcc][$roundbitrate])) {
			return $RealAudioCodecFourCClookup[$fourcc][$roundbitrate];
		} elseif (isset($RealAudioCodecFourCClookup[$fourcc][0])) {
			return $RealAudioCodecFourCClookup[$fourcc][0];
		}
		return $fourcc;
	}

}


?>