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Date: Tue, 09 Sep 2003 16:51:02 +0800
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Subject: Re: [PHP-DEV] Two PECL Proposals [linux_oss] and [oggvorbis]
From: alan@akbkhome.com (Alan Knowles)

As mentioned on irc.. - the linux_oss are mostly ioctl calls, which 
might be worth adding as a generic routine to ext/dio like dio_fctl...

however.. - it may be a rather large switch statement to deal with all 
the various type of inputs... that ioctl accepts...

Anyone else want to add thoughts on that..

Regards
Alan


pollita@php.net wrote:
> At urging of those who feel pear.dev is the wrong place to propose PECL
> packages, I'm repeating my proposal here:
> 
> -------------------------------------------------------------------
> 
> I'd like to propose two PECL extensions:
> 
> 1)  linux_oss   http://frankenbox.alphaweb.net/test/linux_oss-0.1.tgz
> 
> Description:  Bindings for the Linux Open Sound System API.
> 
> Functions:
>   linux_oss_buffer() : Setup DSP buffer on /dev/dsp or similar device
>   linux_oss_channels() : Set DSP to process number of channels (mono vs.
> stereo)
>   linux_oss_rate() : Set sampling rate on DSP device
>   linux_oss_format() : Set sample encoding 8/16 bit, signed/unsigned,
> big/little endian
>   linux_oss_mixer_query() : Probe capabilities of mixer
>   linux_oss_mixer_vol() : Get/Set volume on mixer channel
>   linux_oss_mixer_source() : Get/Set recording source
> 
> Purpose: Control sound I/O on linux systems.  Yes, this is platform
> specific, but sound is a platform specific thing.  I'll propose Windows
> sound system bindings later, and ultimately bindings for Solaris and BSD as
> I research them.
> 
> Requirements: PHP >= 4.3.0, Linux w/ OSS kernel module and headers
> 
> 2) oggvorbis  http://frankenbox.alphaweb.net/test/oggvorbis-0.1.tgz
> 
> Description: OGG/Vorbis fopen wrapper.
> 
> ogg://  write - Encode PCM audio to OGG/Vorbis compressed audio.
> 
> ogg:// read - Decode OGG/Vorbis compressed audio to PCM.
> 
> 
> Example Usage:  .ogg player
> 
> <?php
>   dl('linux_oss.so');
>   dl('oggvorbis.so');
> 
>   $input = fopen('ogg://mymusic.ogg', 'r');
>   $oggdata = stream_get_meta_data($input);
> 
>   /* Chained OGGs will be added as subsequent numericly indexed subarrays of
> wrapper_data */
>   $songdata = $oggdata['wrapper_data'][0];
> 
>   $output = fopen('/dev/dsp', 'w');
>   linux_oss_buffer($output, 8192);
>   linux_oss_channels($output, $songdata['channels']);
>   /* AFMT_S16_LE is the default output mode of ogg:// wrapper.
>       It can also be set to encodings listed above via a context option. */
>   linux_oss_format($output, AFMT_S16_LE);
>   linux_oss_rate($output, $songdata['rate']);
> 
>   $mixer = fopen('/dev/mixer', 'w');
> 
>   /* Master Volume  L / R  */
>   linux_oss_mixer_vol($mixer, MIXER_VOLUME, 100, 100);
> 
>   /* DSP Output Volume L / R */
>   linux_oss_mixer_vol($mixer, MIXER_PCM, 100, 100);
> 
>   stream_copy_to_stream($input, $output);
> 
>   fclose($mixer);
>   fclose($output);
>   fclose($intput);
> ?>
> 
> Requirements: PHP >= 4.3.0, libogg, libvorbis (both governed by BSD style
> licenses)
> 


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