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      Examples

      Examples

      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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