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-rw-r--r--getid3/module.audio.voc.php205
1 files changed, 0 insertions, 205 deletions
diff --git a/getid3/module.audio.voc.php b/getid3/module.audio.voc.php
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--- a/getid3/module.audio.voc.php
+++ /dev/null
@@ -1,205 +0,0 @@
-<?php
-/////////////////////////////////////////////////////////////////
-/// getID3() by James Heinrich <info@getid3.org> //
-// available at http://getid3.sourceforge.net //
-// or http://www.getid3.org //
-/////////////////////////////////////////////////////////////////
-// See readme.txt for more details //
-/////////////////////////////////////////////////////////////////
-// //
-// module.audio.voc.php //
-// module for analyzing Creative VOC Audio files //
-// dependencies: NONE //
-// ///
-/////////////////////////////////////////////////////////////////
-
-
-class getid3_voc
-{
-
- function getid3_voc(&$fd, &$ThisFileInfo) {
-
- $OriginalAVdataOffset = $ThisFileInfo['avdataoffset'];
- fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
- $VOCheader = fread($fd, 26);
-
- if (substr($VOCheader, 0, 19) != 'Creative Voice File') {
- $ThisFileInfo['error'][] = 'Expecting "Creative Voice File" at offset '.$ThisFileInfo['avdataoffset'].', found "'.substr($VOCheader, 0, 19).'"';
- return false;
- }
-
- // shortcuts
- $thisfile_audio = &$ThisFileInfo['audio'];
- $ThisFileInfo['voc'] = array();
- $thisfile_voc = &$ThisFileInfo['voc'];
-
- $ThisFileInfo['fileformat'] = 'voc';
- $thisfile_audio['dataformat'] = 'voc';
- $thisfile_audio['bitrate_mode'] = 'cbr';
- $thisfile_audio['lossless'] = true;
- $thisfile_audio['channels'] = 1; // might be overriden below
- $thisfile_audio['bits_per_sample'] = 8; // might be overriden below
-
- // byte # Description
- // ------ ------------------------------------------
- // 00-12 'Creative Voice File'
- // 13 1A (eof to abort printing of file)
- // 14-15 Offset of first datablock in .voc file (std 1A 00 in Intel Notation)
- // 16-17 Version number (minor,major) (VOC-HDR puts 0A 01)
- // 18-19 2's Comp of Ver. # + 1234h (VOC-HDR puts 29 11)
-
- $thisfile_voc['header']['datablock_offset'] = getid3_lib::LittleEndian2Int(substr($VOCheader, 20, 2));
- $thisfile_voc['header']['minor_version'] = getid3_lib::LittleEndian2Int(substr($VOCheader, 22, 1));
- $thisfile_voc['header']['major_version'] = getid3_lib::LittleEndian2Int(substr($VOCheader, 23, 1));
-
- do {
-
- $BlockOffset = ftell($fd);
- $BlockData = fread($fd, 4);
- $BlockType = ord($BlockData{0});
- $BlockSize = getid3_lib::LittleEndian2Int(substr($BlockData, 1, 3));
- $ThisBlock = array();
-
- @$thisfile_voc['blocktypes'][$BlockType]++;
- switch ($BlockType) {
- case 0: // Terminator
- // do nothing, we'll break out of the loop down below
- break;
-
- case 1: // Sound data
- $BlockData .= fread($fd, 2);
- if ($ThisFileInfo['avdataoffset'] <= $OriginalAVdataOffset) {
- $ThisFileInfo['avdataoffset'] = ftell($fd);
- }
- fseek($fd, $BlockSize - 2, SEEK_CUR);
-
- $ThisBlock['sample_rate_id'] = getid3_lib::LittleEndian2Int(substr($BlockData, 4, 1));
- $ThisBlock['compression_type'] = getid3_lib::LittleEndian2Int(substr($BlockData, 5, 1));
-
- $ThisBlock['compression_name'] = $this->VOCcompressionTypeLookup($ThisBlock['compression_type']);
- if ($ThisBlock['compression_type'] <= 3) {
- $thisfile_voc['compressed_bits_per_sample'] = getid3_lib::CastAsInt(str_replace('-bit', '', $ThisBlock['compression_name']));
- }
-
- // Less accurate sample_rate calculation than the Extended block (#8) data (but better than nothing if Extended Block is not available)
- if (empty($thisfile_audio['sample_rate'])) {
- // SR byte = 256 - (1000000 / sample_rate)
- $thisfile_audio['sample_rate'] = getid3_lib::trunc((1000000 / (256 - $ThisBlock['sample_rate_id'])) / $thisfile_audio['channels']);
- }
- break;
-
- case 2: // Sound continue
- case 3: // Silence
- case 4: // Marker
- case 6: // Repeat
- case 7: // End repeat
- // nothing useful, just skip
- fseek($fd, $BlockSize, SEEK_CUR);
- break;
-
- case 8: // Extended
- $BlockData .= fread($fd, 4);
-
- //00-01 Time Constant:
- // Mono: 65536 - (256000000 / sample_rate)
- // Stereo: 65536 - (256000000 / (sample_rate * 2))
- $ThisBlock['time_constant'] = getid3_lib::LittleEndian2Int(substr($BlockData, 4, 2));
- $ThisBlock['pack_method'] = getid3_lib::LittleEndian2Int(substr($BlockData, 6, 1));
- $ThisBlock['stereo'] = (bool) getid3_lib::LittleEndian2Int(substr($BlockData, 7, 1));
-
- $thisfile_audio['channels'] = ($ThisBlock['stereo'] ? 2 : 1);
- $thisfile_audio['sample_rate'] = getid3_lib::trunc((256000000 / (65536 - $ThisBlock['time_constant'])) / $thisfile_audio['channels']);
- break;
-
- case 9: // data block that supersedes blocks 1 and 8. Used for stereo, 16 bit
- $BlockData .= fread($fd, 12);
- if ($ThisFileInfo['avdataoffset'] <= $OriginalAVdataOffset) {
- $ThisFileInfo['avdataoffset'] = ftell($fd);
- }
- fseek($fd, $BlockSize - 12, SEEK_CUR);
-
- $ThisBlock['sample_rate'] = getid3_lib::LittleEndian2Int(substr($BlockData, 4, 4));
- $ThisBlock['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($BlockData, 8, 1));
- $ThisBlock['channels'] = getid3_lib::LittleEndian2Int(substr($BlockData, 9, 1));
- $ThisBlock['wFormat'] = getid3_lib::LittleEndian2Int(substr($BlockData, 10, 2));
-
- $ThisBlock['compression_name'] = $this->VOCwFormatLookup($ThisBlock['wFormat']);
- if ($this->VOCwFormatActualBitsPerSampleLookup($ThisBlock['wFormat'])) {
- $thisfile_voc['compressed_bits_per_sample'] = $this->VOCwFormatActualBitsPerSampleLookup($ThisBlock['wFormat']);
- }
-
- $thisfile_audio['sample_rate'] = $ThisBlock['sample_rate'];
- $thisfile_audio['bits_per_sample'] = $ThisBlock['bits_per_sample'];
- $thisfile_audio['channels'] = $ThisBlock['channels'];
- break;
-
- default:
- $ThisFileInfo['warning'][] = 'Unhandled block type "'.$BlockType.'" at offset '.$BlockOffset;
- fseek($fd, $BlockSize, SEEK_CUR);
- break;
- }
-
- if (!empty($ThisBlock)) {
- $ThisBlock['block_offset'] = $BlockOffset;
- $ThisBlock['block_size'] = $BlockSize;
- $ThisBlock['block_type_id'] = $BlockType;
- $thisfile_voc['blocks'][] = $ThisBlock;
- }
-
- } while (!feof($fd) && ($BlockType != 0));
-
- // Terminator block doesn't have size field, so seek back 3 spaces
- fseek($fd, -3, SEEK_CUR);
-
- ksort($thisfile_voc['blocktypes']);
-
- if (!empty($thisfile_voc['compressed_bits_per_sample'])) {
- $ThisFileInfo['playtime_seconds'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / ($thisfile_voc['compressed_bits_per_sample'] * $thisfile_audio['channels'] * $thisfile_audio['sample_rate']);
- $thisfile_audio['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds'];
- }
-
- return true;
- }
-
- function VOCcompressionTypeLookup($index) {
- static $VOCcompressionTypeLookup = array(
- 0 => '8-bit',
- 1 => '4-bit',
- 2 => '2.6-bit',
- 3 => '2-bit'
- );
- return (isset($VOCcompressionTypeLookup[$index]) ? $VOCcompressionTypeLookup[$index] : 'Multi DAC ('.($index - 3).') channels');
- }
-
- function VOCwFormatLookup($index) {
- static $VOCwFormatLookup = array(
- 0x0000 => '8-bit unsigned PCM',
- 0x0001 => 'Creative 8-bit to 4-bit ADPCM',
- 0x0002 => 'Creative 8-bit to 3-bit ADPCM',
- 0x0003 => 'Creative 8-bit to 2-bit ADPCM',
- 0x0004 => '16-bit signed PCM',
- 0x0006 => 'CCITT a-Law',
- 0x0007 => 'CCITT u-Law',
- 0x2000 => 'Creative 16-bit to 4-bit ADPCM'
- );
- return (isset($VOCwFormatLookup[$index]) ? $VOCwFormatLookup[$index] : false);
- }
-
- function VOCwFormatActualBitsPerSampleLookup($index) {
- static $VOCwFormatLookup = array(
- 0x0000 => 8,
- 0x0001 => 4,
- 0x0002 => 3,
- 0x0003 => 2,
- 0x0004 => 16,
- 0x0006 => 8,
- 0x0007 => 8,
- 0x2000 => 4
- );
- return (isset($VOCwFormatLookup[$index]) ? $VOCwFormatLookup[$index] : false);
- }
-
-}
-
-
-?> \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-04 06:53:50 +0000