Expose LADSPA functions via public API

Always compile in fluid_ladspa.h and c to that the LADSPA API functions
are always exposed, but use dummy functions that return failure (NULL,
FLUID_FAILED or FALSE) if LADSPA isn't available.

include/fluidsynth.h

@@ -104,6 +104,7 @@ extern "C" {
 #include "fluidsynth/gen.h"
 #include "fluidsynth/voice.h"
 #include "fluidsynth/version.h"
+#include "fluidsynth/ladspa.h"
 
 
 #ifdef __cplusplus

include/fluidsynth/CMakeLists.txt

@@ -27,6 +27,7 @@ if ( NOT MACOSX_FRAMEWORK )
     audio.h 
     event.h 
     gen.h 
+    ladspa.h
     log.h 
     midi.h 
     misc.h 

include/fluidsynth/ladspa.h

@@ -0,0 +1,58 @@
+/* FluidSynth - A Software Synthesizer
+ *
+ * Copyright (C) 2003  Peter Hanappe and others.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *  
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef _FLUIDSYNTH_LADSPA_H
+#define _FLUIDSYNTH_LADSPA_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct _fluid_ladspa_fx_t fluid_ladspa_fx_t;
+
+FLUIDSYNTH_API fluid_ladspa_fx_t *fluid_synth_get_ladspa_fx(fluid_synth_t *synth);
+
+FLUIDSYNTH_API int fluid_ladspa_is_active(fluid_ladspa_fx_t *fx);
+FLUIDSYNTH_API int fluid_ladspa_activate(fluid_ladspa_fx_t *fx);
+FLUIDSYNTH_API int fluid_ladspa_deactivate(fluid_ladspa_fx_t *fx);
+FLUIDSYNTH_API int fluid_ladspa_reset(fluid_ladspa_fx_t *fx);
+FLUIDSYNTH_API int fluid_ladspa_check(fluid_ladspa_fx_t *fx, char *err, int err_size);
+
+FLUIDSYNTH_API int fluid_ladspa_host_port_exists(fluid_ladspa_fx_t *fx, const char *name);
+
+FLUIDSYNTH_API int fluid_ladspa_add_buffer(fluid_ladspa_fx_t *fx, const char *name);
+FLUIDSYNTH_API int fluid_ladspa_buffer_exists(fluid_ladspa_fx_t *fx, const char *name);
+
+FLUIDSYNTH_API int fluid_ladspa_add_effect(fluid_ladspa_fx_t *fx, const char *effect_name,
+        const char *lib_name, const char *plugin_name);
+FLUIDSYNTH_API int fluid_ladspa_effect_can_mix(fluid_ladspa_fx_t *fx, const char *name);
+FLUIDSYNTH_API int fluid_ladspa_effect_set_mix(fluid_ladspa_fx_t *fx, const char *name, int mix, float gain);
+FLUIDSYNTH_API int fluid_ladspa_effect_port_exists(fluid_ladspa_fx_t *fx, const char *effect_name, const char *port_name);
+FLUIDSYNTH_API int fluid_ladspa_effect_set_control(fluid_ladspa_fx_t *fx, const char *effect_name,
+        const char *port_name, float val);
+FLUIDSYNTH_API int fluid_ladspa_effect_link(fluid_ladspa_fx_t *fx, const char *effect_name,
+        const char *port_name, const char *name);
+    
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _FLUIDSYNTH_LADSPA_H */
+

src/CMakeLists.txt

@@ -98,10 +98,6 @@ if ( LIBSNDFILE_SUPPORT )
   include_directories ( ${LIBSNDFILE_INCLUDEDIR} ${LIBSNDFILE_INCLUDE_DIRS} )
 endif ( LIBSNDFILE_SUPPORT )
 
-if ( LADSPA_SUPPORT )
-  set ( fluid_ladspa_SOURCES bindings/fluid_ladspa.c bindings/fluid_ladspa.h )
-endif ( LADSPA_SUPPORT )
-
 if ( MIDISHARE_SUPPORT )
   set ( fluid_midishare_SOURCES drivers/fluid_midishare.c )
   include_directories ( ${MidiShare_INCLUDE_DIRS} )
@@ -179,12 +175,15 @@ set ( libfluidsynth_SOURCES
     bindings/fluid_cmd.c
     bindings/fluid_cmd.h
     bindings/fluid_filerenderer.c
+    bindings/fluid_ladspa.c
+    bindings/fluid_ladspa.h
 )
 
 set ( public_HEADERS
     ${CMAKE_SOURCE_DIR}/include/fluidsynth/audio.h
     ${CMAKE_SOURCE_DIR}/include/fluidsynth/event.h
     ${CMAKE_SOURCE_DIR}/include/fluidsynth/gen.h
+    ${CMAKE_SOURCE_DIR}/include/fluidsynth/ladspa.h
     ${CMAKE_SOURCE_DIR}/include/fluidsynth/log.h
     ${CMAKE_SOURCE_DIR}/include/fluidsynth/midi.h
     ${CMAKE_SOURCE_DIR}/include/fluidsynth/misc.h
@@ -236,7 +235,6 @@ add_library ( libfluidsynth
     ${fluid_dbus_SOURCES}
     ${fluid_jack_SOURCES}
     ${fluid_lash_SOURCES}
-    ${fluid_ladspa_SOURCES}
     ${fluid_midishare_SOURCES}
     ${fluid_oss_SOURCES}
     ${fluid_portaudio_SOURCES}

src/bindings/fluid_ladspa.c

@@ -25,10 +25,13 @@
  * Author: Marcus Weseloh
  */
 
+#include "fluid_ladspa.h"
 #include "fluid_synth.h"
+
+#ifdef LADSPA
+
 #include "fluidsynth_priv.h"
 
-#include "fluid_ladspa.h"
 #include "fluid_sys.h"
 #include <math.h>
 #include <ladspa.h>
@@ -1665,3 +1668,88 @@ static FLUID_INLINE void copy_effect_to_host_buffers(fluid_ladspa_fx_t *fx, int
     }
 }
 #endif /* WITH_FLOAT */
+
+#else /* ifdef LADSPA */
+
+/* Dummy functions to use if LADSPA is not compiled in, to keep the
+ * FluidSynth library ABI stable */
+
+fluid_ladspa_fx_t *fluid_synth_get_ladspa_fx(fluid_synth_t *synth)
+{
+    return NULL;
+}
+
+int fluid_ladspa_is_active(fluid_ladspa_fx_t *fx)
+{
+    return FALSE;
+}
+
+int fluid_ladspa_activate(fluid_ladspa_fx_t *fx)
+{
+    return FLUID_FAILED;
+}
+
+int fluid_ladspa_deactivate(fluid_ladspa_fx_t *fx)
+{
+    return FLUID_FAILED;
+}
+
+int fluid_ladspa_reset(fluid_ladspa_fx_t *fx)
+{
+    return FLUID_FAILED;
+}
+
+int fluid_ladspa_check(fluid_ladspa_fx_t *fx, char *err, int err_size)
+{
+    return FLUID_FAILED;
+}
+
+int fluid_ladspa_host_port_exists(fluid_ladspa_fx_t *fx, const char *name)
+{
+    return FALSE;
+}
+
+int fluid_ladspa_add_buffer(fluid_ladspa_fx_t *fx, const char *name)
+{
+    return FLUID_FAILED;
+}
+
+int fluid_ladspa_buffer_exists(fluid_ladspa_fx_t *fx, const char *name)
+{
+    return FALSE;
+}
+
+int fluid_ladspa_add_effect(fluid_ladspa_fx_t *fx, const char *effect_name,
+        const char *lib_name, const char *plugin_name)
+{
+    return FLUID_FAILED;
+}
+
+int fluid_ladspa_effect_can_mix(fluid_ladspa_fx_t *fx, const char *name)
+{
+    return FALSE;
+}
+
+int fluid_ladspa_effect_set_mix(fluid_ladspa_fx_t *fx, const char *name, int mix, float gain)
+{
+    return FLUID_FAILED;
+}
+
+int fluid_ladspa_effect_port_exists(fluid_ladspa_fx_t *fx, const char *effect_name, const char *port_name)
+{
+    return FALSE;
+}
+
+int fluid_ladspa_effect_set_control(fluid_ladspa_fx_t *fx, const char *effect_name,
+        const char *port_name, float val)
+{
+    return FLUID_FAILED;
+}
+
+int fluid_ladspa_effect_link(fluid_ladspa_fx_t *fx, const char *effect_name,
+        const char *port_name, const char *name)
+{
+    return FLUID_FAILED;
+}
+
+#endif /* ifdef LADSPA */

src/bindings/fluid_ladspa.h

@@ -27,10 +27,6 @@
 #include "fluid_sys.h"
 #include "fluidsynth_priv.h"
 
-#ifdef LADSPA
-
-typedef struct _fluid_ladspa_fx_t fluid_ladspa_fx_t;
-
 fluid_ladspa_fx_t *new_fluid_ladspa_fx(fluid_real_t sample_rate, int buffer_size);
 void delete_fluid_ladspa_fx(fluid_ladspa_fx_t *fx);
 fluid_ladspa_fx_t *fluid_synth_get_ladspa_fx(fluid_synth_t *synth);
@@ -62,6 +58,4 @@ int fluid_ladspa_effect_set_control(fluid_ladspa_fx_t *fx, const char *effect_na
 int fluid_ladspa_effect_link(fluid_ladspa_fx_t *fx, const char *effect_name,
         const char *port_name, const char *name);
 
-
-#endif /* LADSPA */
 #endif /* _FLUID_LADSPA_H */