diff options
Diffstat (limited to 'modules/getid3/module.audio.optimfrog.php')
| -rw-r--r-- | modules/getid3/module.audio.optimfrog.php | 70 |
1 files changed, 35 insertions, 35 deletions
diff --git a/modules/getid3/module.audio.optimfrog.php b/modules/getid3/module.audio.optimfrog.php index 9dde727b..3c667570 100644 --- a/modules/getid3/module.audio.optimfrog.php +++ b/modules/getid3/module.audio.optimfrog.php @@ -22,44 +22,44 @@ //
// $Id: module.audio.optimfrog.php,v 1.3 2006/11/02 10:48:01 ah Exp $ - - + + class getid3_optimfrog extends getid3_handler { public function Analyze() { - + $getid3 = $this->getid3; - + $getid3->include_module('audio-video.riff'); - + $getid3->info['audio']['dataformat'] = 'ofr'; $getid3->info['audio']['bitrate_mode'] = 'vbr'; $getid3->info['audio']['lossless'] = true; fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); $ofr_header = fread($getid3->fp, 8); - + if (substr($ofr_header, 0, 5) == '*RIFF') { return $this->ParseOptimFROGheader42($getid3->fp, $getid3->info); } elseif (substr($ofr_header, 0, 3) == 'OFR') { return $this->ParseOptimFROGheader45($getid3->fp, $getid3->info); } - + throw new getid3_exception('Expecting "*RIFF" or "OFR " at offset '.$getid3->info['avdataoffset'].', found "'.$ofr_header.'"'); } private function ParseOptimFROGheader42() { - + $getid3 = $this->getid3; - + // for fileformat of v4.21 and older fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); - + $ofr_header_data = fread($getid3->fp, 45); $getid3->info['avdataoffset'] = 45; @@ -79,26 +79,26 @@ class getid3_optimfrog extends getid3_handler // move the data chunk after all other chunks (if any) // so that the RIFF parser doesn't see EOF when trying // to skip over the data chunk - + $riff_data = substr($riff_data, 0, 36).substr($riff_data, 44).substr($riff_data, 36, 8); - + // Save audio info key $saved_info_audio = $getid3->info['audio']; // Instantiate riff module and analyze string $riff = new getid3_riff($getid3); $riff->AnalyzeString($riff_data); - + // Restore info key $getid3->info['audio'] = $saved_info_audio; - + $getid3->info['audio']['encoder'] = 'OptimFROG '.$ofr_encoder_version_major.'.'.$ofr_encoder_version_minor; $getid3->info['audio']['channels'] = $getid3->info['riff']['audio'][0]['channels']; $getid3->info['audio']['sample_rate'] = $getid3->info['riff']['audio'][0]['sample_rate']; $getid3->info['audio']['bits_per_sample'] = $getid3->info['riff']['audio'][0]['bits_per_sample']; $getid3->info['playtime_seconds'] = $origna_riff_data_size / ($getid3->info['audio']['channels'] * $getid3->info['audio']['sample_rate'] * ($getid3->info['audio']['bits_per_sample'] / 8)); $getid3->info['audio']['bitrate'] = (($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8) / $getid3->info['playtime_seconds']; - + $getid3->info['fileformat'] = 'ofr'; return true; @@ -107,16 +107,16 @@ class getid3_optimfrog extends getid3_handler private function ParseOptimFROGheader45() { - + $getid3 = $this->getid3; - + // for fileformat of v4.50a and higher $riff_data = ''; fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); - + while (!feof($getid3->fp) && (ftell($getid3->fp) < $getid3->info['avdataend'])) { - + $block_offset = ftell($getid3->fp); $block_data = fread($getid3->fp, 8); $offset = 8; @@ -153,10 +153,10 @@ class getid3_optimfrog extends getid3_handler $info_ofr_this_block['total_samples'] = getid3_lib::LittleEndian2Int(substr($block_data, $offset, 6)); $offset += 6; - + $info_ofr_this_block['raw']['sample_type'] = getid3_lib::LittleEndian2Int($block_data{$offset++}); $info_ofr_this_block['sample_type'] = $this->OptimFROGsampleTypeLookup($info_ofr_this_block['raw']['sample_type']); - + $info_ofr_this_block['channel_config'] = getid3_lib::LittleEndian2Int($block_data{$offset++}); $info_ofr_this_block['channels'] = $info_ofr_this_block['channel_config']; @@ -210,13 +210,13 @@ class getid3_optimfrog extends getid3_handler $comp_data['crc_32'] = getid3_lib::LittleEndian2Int(substr($block_data, $offset, 4)); $offset += 4; - + $comp_data['sample_count'] = getid3_lib::LittleEndian2Int(substr($block_data, $offset, 4)); $offset += 4; - + $comp_data['raw']['sample_type'] = getid3_lib::LittleEndian2Int($block_data{$offset++}); $comp_data['sample_type'] = $this->OptimFROGsampleTypeLookup($comp_data['raw']['sample_type']); - + $comp_data['raw']['channel_configuration'] = getid3_lib::LittleEndian2Int($block_data{$offset++}); $comp_data['channel_configuration'] = $this->OptimFROGchannelConfigurationLookup($comp_data['raw']['channel_configuration']); @@ -306,7 +306,7 @@ class getid3_optimfrog extends getid3_handler break; } } - + if (isset($getid3->info['ofr']['TAIL']['offset'])) { $getid3->info['avdataend'] = $getid3->info['ofr']['TAIL']['offset']; } @@ -317,19 +317,19 @@ class getid3_optimfrog extends getid3_handler // move the data chunk after all other chunks (if any) // so that the RIFF parser doesn't see EOF when trying // to skip over the data chunk - + $riff_data = substr($riff_data, 0, 36).substr($riff_data, 44).substr($riff_data, 36, 8); - + // Save audio info key $saved_info_audio = $getid3->info['audio']; // Instantiate riff module and analyze string $riff = new getid3_riff($getid3); $riff->AnalyzeString($riff_data); - + // Restore info key $getid3->info['audio'] = $saved_info_audio; - + $getid3->info['fileformat'] = 'ofr'; return true; @@ -338,7 +338,7 @@ class getid3_optimfrog extends getid3_handler public static function OptimFROGsampleTypeLookup($sample_type) { - + static $lookup = array ( 0 => 'unsigned int (8-bit)', 1 => 'signed int (8-bit)', @@ -352,7 +352,7 @@ class getid3_optimfrog extends getid3_handler 9 => 'float 16.8 (32-bit)', 10 => 'float 24.0 (32-bit)' ); - + return @$lookup[$sample_type]; } @@ -373,19 +373,19 @@ class getid3_optimfrog extends getid3_handler 9 => 32, 10 => 32 ); - + return @$lookup[$sample_type]; } public static function OptimFROGchannelConfigurationLookup($channel_configuration) { - + static $lookup = array ( 0 => 'mono', 1 => 'stereo' ); - + return @$lookup[$channel_configuration]; } @@ -397,7 +397,7 @@ class getid3_optimfrog extends getid3_handler 0 => 1, 1 => 2 ); - + return @$lookup[$channel_configuration]; } |