Fix #33518: Jack sync doesn't work in 2.64, 2.64 or 2.65 stable versions

Added new build option WITH_JACK_DYNLOAD for CMake and
WITH_BF_JACK_DYNLOAD for SCons, which means there'll be
no build-time linking against libjack and getting symbols
from libjack will happen runtime using dlopen and dlsym
tricks.

Alternative would be to use weak linking, but it'll require
having wrapper for preloading libjack.

This new options are disabled by default and they only
intended to be used on linux. Other platforms shall not
be using this and there shall be no functional changes
on non-linux platforms at all.

3 files changed, 67 insertions, 15 deletions

diff --git a/source/blender/blenkernel/BKE_sound.h b/source/blender/blenkernel/BKE_sound.h
index ec1b6577469..64f0b97c3f0 100644
--- a/source/blender/blenkernel/BKE_sound.h
+++ b/source/blender/blenkernel/BKE_sound.h
@@ -47,6 +47,7 @@ typedef struct SoundWaveform {
 } SoundWaveform;
 
 void sound_init_once(void);
+void sound_exit_once(void);
 
 void sound_init(struct Main *main);
 
@@ -139,4 +140,6 @@ void *sound_get_factory(void *sound);
 
 float sound_get_length(struct bSound *sound);
 
+int sound_is_jack_supported(void);
+
 #endif
diff --git a/source/blender/blenkernel/intern/sound.c b/source/blender/blenkernel/intern/sound.c
index af9d21d8cbc..feff8f95fd7 100644
--- a/source/blender/blenkernel/intern/sound.c
+++ b/source/blender/blenkernel/intern/sound.c
@@ -172,7 +172,7 @@ void sound_force_device(int device)
 void sound_init_once(void)
 {
 	AUD_initOnce();
-	atexit(sound_exit);
+	atexit(sound_exit_once);
 }
 
 void sound_init(struct Main *bmain)
@@ -221,6 +221,12 @@ void sound_exit(void)
 	AUD_exit();
 }
 
+void sound_exit_once(void)
+{
+	AUD_exit();
+	AUD_exitOnce();
+}
+
 // XXX unused currently
 #if 0
 bSound *sound_new_buffer(struct Main *bmain, bSound *source)
@@ -766,6 +772,11 @@ float sound_get_length(bSound *sound)
 	return info.length;
 }
 
+int sound_is_jack_supported(void)
+{
+	return AUD_isJackSupported();
+}
+
 #else // WITH_AUDASPACE
 
 #include "BLI_utildefines.h"
@@ -775,6 +786,7 @@ void sound_force_device(int UNUSED(device)) {}
 void sound_init_once(void) {}
 void sound_init(struct Main *UNUSED(bmain)) {}
 void sound_exit(void) {}
+void sound_exit_once(void) {}
 void sound_cache(struct bSound *UNUSED(sound)) { }
 void sound_delete_cache(struct bSound *UNUSED(sound)) {}
 void sound_load(struct Main *UNUSED(bmain), struct bSound *UNUSED(sound)) {}
@@ -807,4 +819,5 @@ void sound_set_scene_sound_pan(void *handle, float pan, char animated) { (void)h
 void sound_set_scene_volume(struct Scene *scene, float volume) { (void)scene; (void)volume; }
 void sound_set_scene_sound_pitch(void *handle, float pitch, char animated) { (void)handle; (void)pitch; (void)animated; }
 float sound_get_length(struct bSound *sound) { (void)sound; return 0; }
+int sound_is_jack_supported(void) { return 0; }
 #endif // WITH_AUDASPACE
diff --git a/source/blender/makesrna/intern/rna_userdef.c b/source/blender/makesrna/intern/rna_userdef.c
index d5fc3d2050d..a279ec375a9 100644
--- a/source/blender/makesrna/intern/rna_userdef.c
+++ b/source/blender/makesrna/intern/rna_userdef.c
@@ -58,6 +58,20 @@ static EnumPropertyItem compute_device_type_items[] = {
 };
 #endif
 
+static EnumPropertyItem audio_device_items[] = {
+	{0, "NONE", 0, "None", "Null device - there will be no audio output"},
+#ifdef WITH_SDL
+	{1, "SDL", 0, "SDL", "SDL device - simple direct media layer, recommended for sequencer usage"},
+#endif
+#ifdef WITH_OPENAL
+	{2, "OPENAL", 0, "OpenAL", "OpenAL device - supports 3D audio, recommended for game engine usage"},
+#endif
+#ifdef WITH_JACK
+	{3, "JACK", 0, "Jack", "JACK - Audio Connection Kit, recommended for pro audio users"},
+#endif
+	{0, NULL, 0, NULL, NULL}
+};
+
 #ifdef RNA_RUNTIME
 
 #include "DNA_object_types.h"
@@ -434,6 +448,41 @@ static EnumPropertyItem *rna_userdef_compute_device_itemf(bContext *UNUSED(C), P
 }
 #endif
 
+static EnumPropertyItem *rna_userdef_audio_device_itemf(bContext *UNUSED(C), PointerRNA *UNUSED(ptr),
+                                                        PropertyRNA *UNUSED(prop), int *free)
+{
+#ifdef WITH_JACK
+	int jack_supported = sound_is_jack_supported();
+
+	if (jack_supported) {
+		return audio_device_items;
+	}
+	else {
+		int index = 0;
+		int totitem = 0;
+		EnumPropertyItem *item = NULL;
+
+		/* NONE */
+		RNA_enum_item_add(&item, &totitem, &audio_device_items[index++]);
+
+#ifdef WITH_SDL
+		RNA_enum_item_add(&item, &totitem, &audio_device_items[index++]);
+#endif
+
+#ifdef WITH_OPENAL
+		RNA_enum_item_add(&item, &totitem, &audio_device_items[index++]);
+#endif
+
+		RNA_enum_item_end(&item, &totitem);
+		*free = 1;
+
+		return item;
+	}
+#else
+	return audio_device_items;
+#endif
+}
+
 #ifdef WITH_INTERNATIONAL
 static EnumPropertyItem *rna_lang_enum_properties_itemf(bContext *UNUSED(C), PointerRNA *UNUSED(ptr),
                                                         PropertyRNA *UNUSED(prop), int *free)
@@ -3234,20 +3283,6 @@ static void rna_def_userdef_system(BlenderRNA *brna)
 		{0, NULL, 0, NULL, NULL}
 	};
 
-	static EnumPropertyItem audio_device_items[] = {
-		{0, "NONE", 0, "None", "Null device - there will be no audio output"},
-#ifdef WITH_SDL
-		{1, "SDL", 0, "SDL", "SDL device - simple direct media layer, recommended for sequencer usage"},
-#endif
-#ifdef WITH_OPENAL
-		{2, "OPENAL", 0, "OpenAL", "OpenAL device - supports 3D audio, recommended for game engine usage"},
-#endif
-#ifdef WITH_JACK
-		{3, "JACK", 0, "Jack", "JACK - Audio Connection Kit, recommended for pro audio users"},
-#endif
-		{0, NULL, 0, NULL, NULL}
-	};
-
 	static EnumPropertyItem audio_rate_items[] = {
 /*		{8000, "RATE_8000", 0, "8 kHz", "Set audio sampling rate to 8000 samples per second"}, */
 /*		{11025, "RATE_11025", 0, "11.025 kHz", "Set audio sampling rate to 11025 samples per second"}, */
@@ -3524,6 +3559,7 @@ static void rna_def_userdef_system(BlenderRNA *brna)
 	prop = RNA_def_property(srna, "audio_device", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_sdna(prop, NULL, "audiodevice");
 	RNA_def_property_enum_items(prop, audio_device_items);
+	RNA_def_property_enum_funcs(prop, NULL, NULL, "rna_userdef_audio_device_itemf");
 	RNA_def_property_ui_text(prop, "Audio Device", "Audio output device");
 	RNA_def_property_update(prop, 0, "rna_UserDef_audio_update");