Re: [linux-audio-dev] Going mono to stereo in LADSPA?

[Frank Neumann]

Hi *,
following up to myself here:

> If it really doesn't exist - Steve, don't you think this could be a nice
> little 5-minute hack for you? ;-)

I didn't expect it is that simple - it just took _me_ 5 minutes, which
means a lot :-). Pleae see the attached split_1999.xml for swh-plugins,
which of course doesn't yet have an official plugin number from Richard,
and has to be converted with Steve's "makestub.pl split_1999.xml
>split_1999.c". Steve, if it makes sense, feel free to adopt into into swh-plugins. 

Wow, my first plugin ;^),
Frank
<?xml version="1.0" ?>
<!DOCTYPE ladspa SYSTEM "ladspa-swh.dtd">
<?xml-stylesheet href="ladspa.css" type="text/css" ?>
<ladspa>
        <global>
                <meta name="maker" value="Frank Neumann 
&lt;[EMAIL PROTECTED]&gt;"/>
                <meta name="copyright" value="GPL"/>
                <meta name="properties" value="HARD_RT_CAPABLE"/>
        </global>

        <plugin label="split" id="1999">
                <name>Mono to Stereo splitter</name>
                <p>Takes a mono input signal, and outputs it to both left and right 
channel, thus "stereophizing" it.</p>

                <callback event="run">
                        unsigned long pos;

                        for (pos = 0; pos &lt; sample_count; pos++) {
                                LADSPA_Data in = *(input++);

                                        buffer_write(*(outright++), in);
                                        buffer_write(*(outleft++), in);
                        }
                </callback>

                <port label="input" dir="input" type="audio">
                        <name>Input</name>
                        <range min="-1" max="+1"/>
                </port>

                <port label="outleft" dir="output" type="audio">
                        <name>Output left</name>
                        <range min="-1" max="+1"/>
                </port>

                <port label="outright" dir="output" type="audio">
                        <name>Output right</name>
                        <range min="-1" max="+1"/>
                </port>
        </plugin>
</ladspa>