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# Usage

(no version information, might be only in CVS)

Usage -- Examples on using the ogg:// wrapper.

## Examples

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

Example 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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