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Usage

Examples on using the ogg:// wrapper. ()

Examples

Example 1667. Reading an OGG/Vorbis file

<?php
dl
("oggvorbis.so");

/* By default, ogg:// will decode to Signed 16-bit Little Endian */
$fp = fopen('ogg://myaudio.ogg', 'r');

/* Collect some information about the file. */
$metadata = stream_get_meta_data($fp);

/* Inspect the first song (usually the only song,
  but OGG/Vorbis files may be chained) */
$songdata = $metadata['wrapper_data'][0];

echo
"OGG/Vorbis file encoded by: {$songdata['vendor']}\n.";
echo
"  {$songdata['channels']} channels of {$songdata['rate']}Hz sampling encoded at {$songdata['bitrate_nominal']}bps.\n";
foreach(
$songdata['comments'] as $comment) {
   echo
"  $comment\n";
}

while (
$audio_data = fread($fp, 8192)) {
 
/* Do something with the PCM audio we're extracting from the OGG.
    Copying to /dev/dsp is a good target on linux systems,
    just remember to setup the device for your sampling mode first. */
}

fclose($fp);

?>


Example 1668. Encode an audio file to OGG/Vorbis

<?php
dl
('oggvorbis.so');

$context = stream_context_create(array('ogg'=>array(
           
'pcm_mode' => OGGVORBIS_PCM_S8,  /* Signed 8bit audio */
           
'rate' => 44100,                 /* 44kHz CD quality */
           
'bitrate' => 0.5,                /* Midquality VBR */
           
'channels' => 1,                 /* Mono */
           
'serialno' => 12345)));          /* Unique within our stream */

/* Open file for appending.  This will "chain" a second OGG stream at the end of the first. */
$ogg = fopen('ogg://mysong.ogg', 'a', false, $context);

$pcm = fopen('mysample.pcm', 'r');

/* Compress the raw PCM audio from mysample.pcm into mysong.ogg */
stream_copy_to_stream($pcm, $ogg);

fclose($pcm);
fclose($ogg);
?>