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PHP Functions

Function: ociwritetemporarylob

(no version information, might be only in CVS)

ociwritetemporarylob -- Writes temporary blob

Description

bool ociwritetemporarylob ( string var [, int lob_type] )

Note: This function was renamed to oci_lob_write_temporary() after PHP >= 5.0.0. For downward compatibility ociwritetemporarylob() can also be used. This is deprecated, however.

XCII. oggvorbis

Introduction

The OGG/Vorbis file format, as defined by http://www.vorbis.com/ and http://www.vorbis.com/ , is a scheme for compressing audio streams by multiple factors with a minimum of quality loss. This extension adds Ogg Vorbis support to PHP's URL Wrappers . When used in read mode, compressed OGG/Vorbis data is expanded to raw PCM audio in one of six PCM encoding formats listed below.

Requirements

This extension requires PHP >= 4.3.0 , libogg >= 1.0, and libvorbis >= 1.0.

Runtime Configuration

This extension has no configuration directives defined in php.ini .

Installation

oggvorbis is installed through the usual PECL package installation process.

$ pear install oggvorbis

Copy the resulting oggvorbis.so to an appropriate location and add extension=oggvorbis.so to your php.ini file or load it dynamically in your PHP script using dl('oggvorbis.so');

Context options

Table 1. OGG/Vorbis tuning options

Option Definition Relevance Default pcm_mode PCM byte encoding used. See constants below. Read / Write OGGVORBIS_PCM_S16_LE rate PCM Sampling rate. Measured in Hz. Write only 44100 bitrate Vorbis Average Bitrate Encoding / Variable Bitrate Encoding. Measured in bps (ABR) or Quality level (VBR: 0.0 to 1.0). 128000 ABR is rough equal to 0.4 VBR. Write only 128000 channels Number of PCM channels. 1 == Mono, 2 == Stereo. Write only 2 serialno Serial Number of stream within file. Must be unique within file. Because of the potential to select a duplicate serial number within a chained file, make efforts to manually assign unique numbers when encoding. Write only Random comments Associative array of file comments. Will be translated to strtoupper($name) . "=$value" . Note: This context option is not available in oggvorbis-0.1 Write only array('ENCODER' => 'PHP/OggVorbis, http://pear.php.net/oggvorbis')

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

Table 2. OGG/Vorbis supports PCM encodings in the following formats

Constant Definition OGGVORBIS_PCM_U8 Unsigned 8-bit PCM. OGGVORBIS_PCM_S8 Signed 8-bit PCM. OGGVORBIS_PCM_U16_LE Unsigned 16-bit PCM. Little Endian byte order. OGGVORBIS_PCM_U16_BE Unsigned 16-bit PCM. Big Endian byte order. OGGVORBIS_PCM_S16_LE Signed 16-bit PCM. Little Endian byte order. OGGVORBIS_PCM_S16_BE Signed 16-bit PCM. Big Endian byte order. Table of Contents Usage -- Examples on using the ogg:// wrapper. Usage 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);
?>

XCIII. OpenAL Audio Bindings

Introduction

Platform independent audio bindings. Requires the OpenAL library .

Installation

This PECL extension is not bundled with PHP.

Additional information such as new releases, downloads, source files, maintainer information, and a CHANGELOG, can be located here: http://pecl.php.net/package/openal .

You may download this PECL extension DLL from the PHP Downloads page or at http://snaps.php.net/ .

Runtime Configuration

This extension has no configuration directives defined in php.ini .

Resource Types

This extension defines four resource types: Open AL(Device) - Returned by openal_device_open() , Open AL(Context) - Returned by openal_context_create() , Open AL(Buffer) - Returned by openal_buffer_create() , and Open AL(Source) - Returned by openal_source_create() .

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

ALC_FREQUENCY ( integer )

Context Attribute

ALC_REFRESH ( integer )

Context Attribute

ALC_SYNC ( integer )

Context Attribute

AL_FREQUENCY ( integer )

Buffer Setting

AL_BITS ( integer )

Buffer Setting

AL_CHANNELS ( integer )

Buffer Setting

AL_SIZE ( integer )

Buffer Setting

AL_BUFFER ( integer )

Source/Listener Setting (Integer)

AL_SOURCE_RELATIVE ( integer )

Source/Listener Setting (Integer)

AL_SOURCE_STATE ( integer )

Source/Listener Setting (Integer)

AL_PITCH ( integer )