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Add LV2 extension to notify host about midi-bank/pgm state.

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This commit is contained in:
Robin Gareus 2017-09-08 19:26:08 +02:00
parent 8bc2bf0155
commit e452ba0fe1
4 changed files with 84 additions and 6 deletions
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25
libs/ardour/ardour/lv2_extensions.h
View File

@ -225,6 +225,31 @@ typedef struct {
void (*free)(char*);
} LV2_Midnam_Interface;
/**
@}
*/
/**
@defgroup bankpatch
@{
*/
#define LV2_BANKPATCH_URI "http://ardour.org/lv2/bankpatch"
#define LV2_BANKPATCH_PREFIX LV2_BANKPATCH_URI "#"
#define LV2_BANKPATCH__notify LV2_BANKPATCH_PREFIX "notify"
typedef void* LV2_BankPatch_Handle;
/** a LV2 Feature provided by the Host to the plugin */
typedef struct {
/** Opaque host data */
LV2_BankPatch_Handle handle;
/** Info from plugin's run(), notify host that bank/program changed */
void (*notify)(LV2_BankPatch_Handle handle, uint8_t channel, uint32_t bank, uint8_t pgm);
} LV2_BankPatch;
/**
@}
*/

17
libs/ardour/ardour/lv2_plugin.h
View File

@ -277,9 +277,23 @@ class LIBARDOUR_API LV2Plugin : public ARDOUR::Plugin, public ARDOUR::Workee
Glib::Threads::Mutex _work_mutex;
#ifdef LV2_EXTENDED
static void queue_draw (LV2_Inline_Display_Handle);
static void midnam_update (LV2_Midnam_Handle);
static void bankpatch_notify (LV2_BankPatch_Handle, uint8_t, uint32_t, uint8_t);
const LV2_Inline_Display_Interface* _display_interface;
bool _inline_display_in_gui;
const LV2_Midnam_Interface* _midname_interface;
const LV2_Midnam_Interface* _midname_interface;
uint32_t _bankpatch[16];
bool seen_bankpatch;
bool knows_bank_patch () { return seen_bankpatch; }
uint32_t bank_patch (uint8_t chn) {
assert (chn < 16);
if (chn > 15) return UINT32_MAX;
return _bankpatch[chn];
}
#endif
typedef struct {
@ -297,6 +311,7 @@ class LIBARDOUR_API LV2Plugin : public ARDOUR::Plugin, public ARDOUR::Workee
#ifdef LV2_EXTENDED
LV2_Feature _queue_draw_feature;
LV2_Feature _midnam_feature;
LV2_Feature _bankpatch_feature;
#endif
// Options passed to plugin

4
libs/ardour/ardour/plugin.h
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@ -180,6 +180,10 @@ class LIBARDOUR_API Plugin : public PBD::StatefulDestructible, public Latent
virtual std::string midnam_model () { return ""; }
PBD::Signal0<void> UpdateMidnam;
virtual bool knows_bank_patch () { return false; }
virtual uint32_t bank_patch (uint8_t chn) { return UINT32_MAX; }
PBD::Signal1<void, uint8_t> BankPatchChange;
struct PresetRecord {
PresetRecord () : valid (false) {}
PresetRecord (const std::string& u, const std::string& l, bool s = true) : uri (u), label (l), user (s), valid (true) {}

44
libs/ardour/lv2_plugin.cc
View File

@ -230,19 +230,35 @@ work_respond(LV2_Worker_Respond_Handle handle,
#ifdef LV2_EXTENDED
/* inline display extension */
static void
queue_draw (LV2_Inline_Display_Handle handle)
void
LV2Plugin::queue_draw (LV2_Inline_Display_Handle handle)
{
LV2Plugin* plugin = (LV2Plugin*)handle;
plugin->QueueDraw(); /* EMIT SIGNAL */
}
static void
midnam_update (LV2_Midnam_Handle handle)
void
LV2Plugin::midnam_update (LV2_Midnam_Handle handle)
{
LV2Plugin* plugin = (LV2Plugin*)handle;
plugin->UpdateMidnam (); /* EMIT SIGNAL */
}
void
LV2Plugin::bankpatch_notify (LV2_BankPatch_Handle handle, uint8_t chn, uint32_t bank, uint8_t pgm)
{
LV2Plugin* plugin = (LV2Plugin*)handle;
if (chn > 15) {
return;
}
plugin->seen_bankpatch = true;
if (pgm > 127 || bank > 16383) {
plugin->_bankpatch[chn] = UINT32_MAX;
} else {
plugin->_bankpatch[chn] = (bank << 7) | pgm;
}
plugin->BankPatchChange (chn); /* EMIT SIGNAL */
}
#endif
/* log extension */
@ -329,6 +345,7 @@ struct LV2Plugin::Impl {
#ifdef LV2_EXTENDED
LV2_Inline_Display* queue_draw;
LV2_Midnam* midnam;
LV2_BankPatch* bankpatch;
#endif
};
@ -422,7 +439,7 @@ LV2Plugin::init(const void* c_plugin, framecnt_t rate)
lilv_node_free(state_uri);
lilv_node_free(state_iface_uri);
_features = (LV2_Feature**)calloc(13, sizeof(LV2_Feature*));
_features = (LV2_Feature**)calloc(14, sizeof(LV2_Feature*));
_features[0] = &_instance_access_feature;
_features[1] = &_data_access_feature;
_features[2] = &_make_path_feature;
@ -457,6 +474,15 @@ LV2Plugin::init(const void* c_plugin, framecnt_t rate)
_midnam_feature.URI = LV2_MIDNAM__update;
_midnam_feature.data = _impl->midnam;
_features[n_features++] = &_midnam_feature;
_impl->bankpatch = (LV2_BankPatch*)
malloc (sizeof(LV2_BankPatch));
_impl->bankpatch->handle = this;
_impl->bankpatch->notify = bankpatch_notify;
_bankpatch_feature.URI = LV2_BANKPATCH__notify;
_bankpatch_feature.data = _impl->bankpatch;
_features[n_features++] = &_bankpatch_feature;
#endif
#ifdef HAVE_LV2_1_2_0
@ -490,6 +516,13 @@ LV2Plugin::init(const void* c_plugin, framecnt_t rate)
_features[n_features++] = &_options_feature;
#endif
#ifdef LV2_EXTENDED
seen_bankpatch = false;
for (uint32_t chn = 0; chn < 16; ++chn) {
_bankpatch[chn] = UINT32_MAX;
}
#endif
LV2_State_Make_Path* make_path = (LV2_State_Make_Path*)malloc(
sizeof(LV2_State_Make_Path));
make_path->handle = this;
@ -900,6 +933,7 @@ LV2Plugin::~LV2Plugin ()
#ifdef LV2_EXTENDED
free(_impl->queue_draw);
free(_impl->midnam);
free(_impl->bankpatch);
#endif
free(_features);