public function ParseRIFF($start_offset, $max_offset)
{
$getid3 = $this->getid3;
$info =& $getid3->info;
$endian_function = $this->endian_function;
$max_offset = min($max_offset, $info['avdataend']);
$riff_chunk = false;
$this->fseek($start_offset, SEEK_SET);
while ($this->ftell() < $max_offset) {
$chunk_name = $this->fread(4);
if (strlen($chunk_name) < 4) {
throw new getid3_exception('Expecting chunk name at offset ' . ($this->ftell() - 4) . ' but found nothing. Aborting RIFF parsing.');
}
$chunk_size = getid3_lib::$endian_function($this->fread(4));
if ($chunk_size == 0) {
continue;
throw new getid3_exception('Chunk size at offset ' . ($this->ftell() - 4) . ' is zero. Aborting RIFF parsing.');
}
if ($chunk_size % 2 != 0) {
// all structures are packed on word boundaries
$chunk_size++;
}
switch ($chunk_name) {
case 'LIST':
$list_name = $this->fread(4);
switch ($list_name) {
case 'movi':
case 'rec ':
$riff_chunk[$list_name]['offset'] = $this->ftell() - 4;
$riff_chunk[$list_name]['size'] = $chunk_size;
static $parsed_audio_stream = false;
if (!$parsed_audio_stream) {
$where_we_were = $this->ftell();
$audio_chunk_header = $this->fread(12);
$audio_chunk_stream_num = substr($audio_chunk_header, 0, 2);
$audio_chunk_stream_type = substr($audio_chunk_header, 2, 2);
$audio_chunk_size = getid3_lib::LittleEndian2Int(substr($audio_chunk_header, 4, 4));
if ($audio_chunk_stream_type == 'wb') {
$first_four_bytes = substr($audio_chunk_header, 8, 4);
//// MPEG
if (preg_match('/^\\xFF[\\xE2-\\xE7\\xF2-\\xF7\\xFA-\\xFF][\\x00-\\xEB]/s', $first_four_bytes)) {
if (!$getid3->include_module_optional('audio.mp3')) {
$getid3->warning('MP3 skipped because mp3 module is missing.');
} elseif (getid3_mp3::MPEGaudioHeaderBytesValid($first_four_bytes)) {
// Clone getid3 - messing with offsets - better safe than sorry
$clone = clone $getid3;
$clone->info['avdataoffset'] = $this->ftell() - 4;
$clone->info['avdataend'] = $this->ftell() + $audio_chunk_size;
$mp3 = new getid3_mp3($clone);
$mp3->AnalyzeMPEGaudioInfo();
// Import from clone and destroy
if (isset($clone->info['mpeg']['audio'])) {
$info['mpeg']['audio'] = $clone->info['mpeg']['audio'];
$info['audio']['dataformat'] = 'mp' . $info['mpeg']['audio']['layer'];
$info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate'];
$info['audio']['channels'] = $info['mpeg']['audio']['channels'];
$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate'];
$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
$info['bitrate'] = $info['audio']['bitrate'];
$getid3->warning($clone->warnings());
unset($clone);
}
}
} elseif (preg_match('/^\\x0B\\x77/s', $first_four_bytes)) {
if (!$getid3->include_module_optional('audio.ac3')) {
$getid3->warning('AC3 skipped because ac3 module is missing.');
} else {
// Clone getid3 - messing with offsets - better safe than sorry
$clone = clone $getid3;
$clone->info['avdataoffset'] = $this->ftell() - 4;
$clone->info['avdataend'] = $this->ftell() + $audio_chunk_size;
// Analyze clone by fp
$ac3 = new getid3_ac3($clone);
$ac3->Analyze();
// Import from clone and destroy
$info['audio'] = $clone->info['audio'];
$info['ac3'] = $clone->info['ac3'];
$getid3->warning($clone->warnings());
unset($clone);
}
}
}
$parsed_audio_stream = true;
$this->fseek($where_we_were, SEEK_SET);
}
$this->fseek($chunk_size - 4, SEEK_CUR);
break;
default:
if (!isset($riff_chunk[$list_name])) {
$riff_chunk[$list_name] = array();
}
$list_chunk_parent = $list_name;
$list_chunk_max_offset = $this->ftell() - 4 + $chunk_size;
if ($parsed_chunk = $this->ParseRIFF($this->ftell(), $this->ftell() + $chunk_size - 4)) {
$riff_chunk[$list_name] = array_merge_recursive($riff_chunk[$list_name], $parsed_chunk);
}
break;
}
break;
default:
$this_index = 0;
if (isset($riff_chunk[$chunk_name]) && is_array($riff_chunk[$chunk_name])) {
$this_index = count($riff_chunk[$chunk_name]);
}
$riff_chunk[$chunk_name][$this_index]['offset'] = $this->ftell() - 8;
$riff_chunk[$chunk_name][$this_index]['size'] = $chunk_size;
switch ($chunk_name) {
case 'data':
$info['avdataoffset'] = $this->ftell();
$info['avdataend'] = $info['avdataoffset'] + $chunk_size;
$riff_data_chunk_contents_test = $this->fread(36);
//// This is probably MP3 data
if (strlen($riff_data_chunk_contents_test) > 0 && preg_match('/^\\xFF[\\xE2-\\xE7\\xF2-\\xF7\\xFA-\\xFF][\\x00-\\xEB]/s', substr($riff_data_chunk_contents_test, 0, 4))) {
try {
if (!$getid3->include_module_optional('audio.mp3')) {
$getid3->warning('MP3 skipped because mp3 module is missing.');
}
// Clone getid3 - messing with offsets - better safe than sorry
$clone = clone $getid3;
if (getid3_mp3::MPEGaudioHeaderBytesValid(substr($riff_data_chunk_contents_test, 0, 4))) {
$mp3 = new getid3_mp3($clone);
$mp3->AnalyzeMPEGaudioInfo();
// Import from clone and destroy
if (isset($clone->info['mpeg']['audio'])) {
$info['mpeg']['audio'] = $clone->info['mpeg']['audio'];
$info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate'];
$info['audio']['channels'] = $info['mpeg']['audio']['channels'];
$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate'];
$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
$info['bitrate'] = $info['audio']['bitrate'];
$getid3->warning($clone->warnings());
unset($clone);
}
}
} catch (Exception $e) {
// do nothing - not MP3 data
}
} elseif (strlen($riff_data_chunk_contents_test) > 0 && substr($riff_data_chunk_contents_test, 0, 2) == "\vw") {
if (!$getid3->include_module_optional('audio.ac3')) {
$getid3->warning('AC3 skipped because ac3 module is missing.');
} else {
// Clone getid3 - messing with offsets - better safe than sorry
$clone = clone $getid3;
$clone->info['avdataoffset'] = $riff_chunk[$chunk_name][$this_index]['offset'];
$clone->info['avdataend'] = $clone->info['avdataoffset'] + $riff_chunk[$chunk_name][$this_index]['size'];
// Analyze clone by fp
$ac3 = new getid3_ac3($clone);
$ac3->Analyze();
// Import from clone and destroy
$info['audio'] = $clone->info['audio'];
$info['ac3'] = $clone->info['ac3'];
$getid3->warning($clone->warnings());
unset($clone);
}
} elseif (strlen($riff_data_chunk_contents_test) > 0 && substr($riff_data_chunk_contents_test, 8, 2) == "w\v") {
if (!$getid3->include_module_optional('audio.ac3')) {
$getid3->warning('AC3 skipped because ac3 module is missing.');
} else {
// Extract ac3 data to string
$ac3_data = '';
for ($i = 0; $i < 28; $i += 2) {
// swap byte order
$ac3_data .= substr($riff_data_chunk_contents_test, 8 + $i + 1, 1);
$ac3_data .= substr($riff_data_chunk_contents_test, 8 + $i + 0, 1);
}
// Clone getid3 - messing with offsets - better safe than sorry
$clone = clone $getid3;
$clone->info['avdataoffset'] = 0;
$clone->info['avdataend'] = 20;
// Analyse clone by string
$ac3 = new getid3_ac3($clone);
$ac3->AnalyzeString($ac3_data);
// Import from clone and destroy
$info['audio'] = $clone->info['audio'];
$info['ac3'] = $clone->info['ac3'];
$getid3->warning($clone->warnings());
unset($clone);
}
}
if (strlen($riff_data_chunk_contents_test) > 0 && substr($riff_data_chunk_contents_test, 0, 4) == 'wvpk') {
// This is WavPack data
$info['wavpack']['offset'] = $riff_chunk[$chunk_name][$this_index]['offset'];
$info['wavpack']['size'] = getid3_lib::LittleEndian2Int(substr($riff_data_chunk_contents_test, 4, 4));
$this->RIFFparseWavPackHeader(substr($riff_data_chunk_contents_test, 8, 28));
} else {
// This is some other kind of data (quite possibly just PCM)
// do nothing special, just skip it
}
$this->fseek($riff_chunk[$chunk_name][$this_index]['offset'] + 8 + $chunk_size, SEEK_SET);
break;
case 'bext':
case 'cart':
case 'fmt ':
case 'MEXT':
case 'DISP':
// always read data in
$riff_chunk[$chunk_name][$this_index]['data'] = $this->fread($chunk_size);
break;
default:
if (!empty($list_chunk_parent) && $riff_chunk[$chunk_name][$this_index]['offset'] + $riff_chunk[$chunk_name][$this_index]['size'] <= $list_chunk_max_offset) {
$riff_chunk[$list_chunk_parent][$chunk_name][$this_index]['offset'] = $riff_chunk[$chunk_name][$this_index]['offset'];
$riff_chunk[$list_chunk_parent][$chunk_name][$this_index]['size'] = $riff_chunk[$chunk_name][$this_index]['size'];
unset($riff_chunk[$chunk_name][$this_index]['offset']);
unset($riff_chunk[$chunk_name][$this_index]['size']);
if (isset($riff_chunk[$chunk_name][$this_index]) && empty($riff_chunk[$chunk_name][$this_index])) {
unset($riff_chunk[$chunk_name][$this_index]);
}
if (isset($riff_chunk[$chunk_name]) && empty($riff_chunk[$chunk_name])) {
unset($riff_chunk[$chunk_name]);
}
$riff_chunk[$list_chunk_parent][$chunk_name][$this_index]['data'] = $this->fread($chunk_size);
} elseif ($chunk_size < 2048) {
// only read data in if smaller than 2kB
$riff_chunk[$chunk_name][$this_index]['data'] = $this->fread($chunk_size);
} else {
$this->fseek($chunk_size, SEEK_CUR);
}
break;
}
break;
}
}
return $riff_chunk;
}
public function Analyze()
{
$getid3 = $this->getid3;
$info =& $getid3->info;
$getid3->include_module('audio.mp3');
$info['quicktime'] = array();
$info_quicktime =& $info['quicktime'];
$info['fileformat'] = 'quicktime';
$info_quicktime['hinting'] = false;
fseek($getid3->fp, $info['avdataoffset'], SEEK_SET);
$offset = $atom_counter = 0;
while ($offset < $info['avdataend']) {
fseek($getid3->fp, $offset, SEEK_SET);
$atom_header = fread($getid3->fp, 8);
$atom_size = getid3_lib::BigEndian2Int(substr($atom_header, 0, 4));
$atom_name = substr($atom_header, 4, 4);
$info_quicktime[$atom_name]['name'] = $atom_name;
$info_quicktime[$atom_name]['size'] = $atom_size;
$info_quicktime[$atom_name]['offset'] = $offset;
if ($offset + $atom_size > $info['avdataend']) {
throw new getid3_exception('Atom at offset ' . $offset . ' claims to go beyond end-of-file (length: ' . $atom_size . ' bytes)');
}
if ($atom_size == 0) {
// Furthermore, for historical reasons the list of atoms is optionally
// terminated by a 32-bit integer set to 0. If you are writing a program
// to read user data atoms, you should allow for the terminating 0.
break;
}
switch ($atom_name) {
case 'mdat':
// Media DATa atom
// 'mdat' contains the actual data for the audio/video
if ($atom_size > 8 && (!isset($info['avdataend_tmp']) || $info_quicktime[$atom_name]['size'] > $info['avdataend_tmp'] - $info['avdataoffset'])) {
$info['avdataoffset'] = $info_quicktime[$atom_name]['offset'] + 8;
$old_av_data_end = $info['avdataend'];
$info['avdataend'] = $info_quicktime[$atom_name]['offset'] + $info_quicktime[$atom_name]['size'];
//// MP3
if (!$getid3->include_module_optional('audio.mp3')) {
$getid3->warning('MP3 skipped because mpeg module is missing.');
} else {
// Clone getid3 - messing with offsets - better safe than sorry
$clone = clone $getid3;
if (getid3_mp3::MPEGaudioHeaderValid(getid3_mp3::MPEGaudioHeaderDecode(fread($clone->fp, 4)))) {
$mp3 = new getid3_mp3($clone);
$mp3->AnalyzeMPEGaudioInfo();
// Import from clone and destroy
if (isset($clone->info['mpeg']['audio'])) {
$info['mpeg']['audio'] = $clone->info['mpeg']['audio'];
$info['audio']['dataformat'] = 'mp3';
$info['audio']['codec'] = !empty($info['mpeg']['audio']['encoder']) ? $info['mpeg']['audio']['encoder'] : (!empty($info['mpeg']['audio']['codec']) ? $info['mpeg']['audio']['codec'] : (!empty($info['mpeg']['audio']['LAME']) ? 'LAME' : 'mp3'));
$info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate'];
$info['audio']['channels'] = $info['mpeg']['audio']['channels'];
$info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate'];
$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
$info['bitrate'] = $info['audio']['bitrate'];
$getid3->warning($clone->warnings());
unset($clone);
}
}
}
$info['avdataend'] = $old_av_data_end;
unset($old_av_data_end);
}
break;
case 'free':
// FREE space atom
// FREE space atom
case 'skip':
// SKIP atom
// SKIP atom
case 'wide':
// 64-bit expansion placeholder atom
// 'free', 'skip' and 'wide' are just padding, contains no useful data at all
break;
default:
$atom_hierarchy = array();
$info_quicktime[$atom_name] = $this->QuicktimeParseAtom($atom_name, $atom_size, fread($getid3->fp, $atom_size), $offset, $atom_hierarchy);
break;
}
$offset += $atom_size;
$atom_counter++;
}
if (!empty($info['avdataend_tmp'])) {
// this value is assigned to a temp value and then erased because
// otherwise any atoms beyond the 'mdat' atom would not get parsed
$info['avdataend'] = $info['avdataend_tmp'];
unset($info['avdataend_tmp']);
}
if (!isset($info['bitrate']) && isset($info['playtime_seconds'])) {
$info['bitrate'] = ($info['avdataend'] - $info['avdataoffset']) * 8 / $info['playtime_seconds'];
}
if (isset($info['bitrate']) && !isset($info['audio']['bitrate']) && !isset($info_quicktime['video'])) {
$info['audio']['bitrate'] = $info['bitrate'];
}
if (@$info['audio']['dataformat'] == 'mp4' && empty($info['video']['resolution_x'])) {
$info['fileformat'] = 'mp4';
$info['mime_type'] = 'audio/mp4';
unset($info['video']['dataformat']);
}
if (!$getid3->option_extra_info) {
unset($info_quicktime['moov']);
}
if (empty($info['audio']['dataformat']) && !empty($info_quicktime['audio'])) {
$info['audio']['dataformat'] = 'quicktime';
}
if (empty($info['video']['dataformat']) && !empty($info_quicktime['video'])) {
$info['video']['dataformat'] = 'quicktime';
}
return true;
}
