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Examples on using the ogg:// wrapper.


Examples on using the ogg:// wrapper.

Example #1 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 (
$audio_data fread($fp8192)) {
  
/* 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 #2 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);
?>



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