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/* utils.h
Free software by Richard W.E. Furse. Do with as you will. No
warranty. */
#ifndef LADSPA_SDK_LOAD_PLUGIN_LIB
#define LADSPA_SDK_LOAD_PLUGIN_LIB
#include <ladspa.h>
/* This function call takes a plugin library filename, searches for
the library along the LADSPA_PATH, loads it with dlopen() and
returns a plugin handle for use with findPluginDescriptor() or
unloadLADSPAPluginLibrary(). Errors are handled by writing a
message to stderr and calling exit(1). It is alright (although
inefficient) to call this more than once for the same file. */
void * LADSPAload(const char * pcPluginFilename);
/* This function unloads a LADSPA plugin library. */
void LADSPAunload(void * pvLADSPAPluginLibrary);
/* This function locates a LADSPA plugin within a plugin library
loaded with loadLADSPAPluginLibrary(). Errors are handled by
writing a message to stderr and calling exit(1). Note that the
plugin library filename is only included to help provide
informative error messages. */
const LADSPA_Descriptor *
LADSPAfind(void * pvLADSPAPluginLibrary,
const char * pcPluginLibraryFilename,
const char * pcPluginLabel);
/* Find the default value for a port. Return 0 if a default is found
and -1 if not. */
int LADSPADefault(const LADSPA_PortRangeHint * psPortRangeHint,
const unsigned long lSampleRate,
LADSPA_Data * pfResult);
/* MMAP to a controls file */
#define LADSPA_CNTRL_INPUT 0
#define LADSPA_CNTRL_OUTPUT 1
typedef struct LADSPA_Control_Data_ {
int index;
LADSPA_Data data[16]; /* Max number of channels, would be nicer if
this wasn't a fixed number */
int type;
} LADSPA_Control_Data;
typedef struct LADSPA_Control_ {
unsigned long length;
unsigned long id;
unsigned long channels;
unsigned long num_controls;
int input_index;
int output_index;
LADSPA_Control_Data control[];
} LADSPA_Control;
LADSPA_Control * LADSPAcontrolMMAP(const LADSPA_Descriptor *psDescriptor,
const char *controls_filename, unsigned int channels);
void LADSPAcontrolUnMMAP(LADSPA_Control *control);
#endif
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