bandpass_a_iir_1893.xml

<?xml version="1.0" ?>
<!DOCTYPE ladspa SYSTEM "ladspa-swh.dtd">
<?xml-stylesheet href="ladspa.css" type="text/css" ?>
<ladspa>
	<global>
		<meta name="maker" value="Alexander Ehlert &lt;mag@glame.de&gt;"/>
		<meta name="copyright" value="GPL"/>
		<meta name="properties" value="HARD_RT_CAPABLE"/>
		<code>
			#include "config.h"
			#include "util/iir.h"
                        
		</code>
	</global>

	<plugin label="bandpass_a_iir" id="1893" class="BandpassPlugin">
		<name>Glame Bandpass Analog Filter</name>
                <p> IIR bandpass filter modeled after an analog circuit. This filter was ported from the glame multitrack editor to ladspa.
                </p>

                <callback event="instantiate">
                  sample_rate = s_rate;
                </callback>
		<callback event="run">
                  calc_2polebandpass(iirf, gt, center, width, sample_rate);
                  iir_process_buffer_1s_5(iirf, gt, input, output, sample_count,0);

                  // Unused variable
                  (void)(run_adding_gain);
                </callback>

                <callback event="activate">                  
                  gt = init_iir_stage(IIR_STAGE_LOWPASS,1,3,2);
                  iirf = init_iirf_t(gt);
                  calc_2polebandpass(iirf, gt, *(plugin_data->center), *(plugin_data->width), sample_rate);
                </callback>

                <callback event="cleanup">
                  free_iirf_t(plugin_data->iirf, plugin_data->gt);
                  free_iir_stage(plugin_data->gt);
                </callback>

                <port label="center" dir="input" type="control" hint="default_low, sample_rate, logarithmic">
			<name>Center Frequency (Hz)</name>
 			<range min="0.0001" max="0.45"/>
		</port>

                <port label="width" dir="input" type="control" hint="default_middle, sample_rate, logarithmic">
			<name>Bandwidth (Hz)</name>
 			<range min="0.0001" max="0.45"/>
		</port>
                
		<port label="input" dir="input" type="audio">
			<name>Input</name>
		</port>

		<port label="output" dir="output" type="audio">
			<name>Output</name>
		</port>
            
                <instance-data label="iirf" type="iirf_t*"/>
                <instance-data label="gt" type="iir_stage_t*"/>  
                <instance-data label="sample_rate" type="long"/>           

	</plugin>
</ladspa>