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Support new LV2 buf-size extension if a new enough (currently svn) LV2 is present.

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git-svn-id: svn://localhost/ardour2/branches/3.0@13112 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
David Robillard 2012-08-08 00:16:30 +00:00
parent af4589e4bc
commit cf3ae3dec1
3 changed files with 60 additions and 4 deletions
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1
libs/ardour/ardour/lv2_plugin.h
View file

@ -216,6 +216,7 @@ class LV2Plugin : public ARDOUR::Plugin, public ARDOUR::Workee
LV2_Feature _instance_access_feature;
LV2_Feature _make_path_feature;
LV2_Feature _work_schedule_feature;
LV2_Feature _buf_size_feature;
mutable unsigned _state_version;

61
libs/ardour/lv2_plugin.cc
View file

@ -56,6 +56,9 @@
#include "lv2/lv2plug.in/ns/ext/time/time.h"
#include "lv2/lv2plug.in/ns/ext/worker/worker.h"
#include "lv2/lv2plug.in/ns/extensions/ui/ui.h"
#ifdef HAVE_NEW_LV2
#include "lv2/lv2plug.in/ns/ext/buf-size/buf-size.h"
#endif
#include "lv2_evbuf.h"
@ -144,6 +147,44 @@ work_respond(LV2_Worker_Respond_Handle handle,
}
}
#ifdef HAVE_NEW_LV2
/** Called by the plugin to discover properties of the block length. */
static LV2_Buf_Size_Status
get_sample_count(LV2_Buf_Size_Access_Handle handle,
uint32_t* min,
uint32_t* max,
uint32_t* multiple_of,
uint32_t* power_of)
{
AudioEngine* engine = (AudioEngine*)handle;
*min = 1;
*max = engine->frames_per_cycle();
*multiple_of = 1;
*power_of = 0;
return LV2_BUF_SIZE_SUCCESS;
}
/** Called by the plugin to get the size required for some buffer type. */
static LV2_Buf_Size_Status
get_buf_size(LV2_Buf_Size_Access_Handle handle,
uint32_t* buf_size,
LV2_URID type,
uint32_t sample_count)
{
AudioEngine* engine = (AudioEngine*)handle;
if (type == LV2Plugin::_sequence_type) {
*buf_size = engine->raw_buffer_size(DataType::MIDI);
return LV2_BUF_SIZE_SUCCESS;
}
*buf_size = 0;
return LV2_BUF_SIZE_ERR_BAD_TYPE;
}
static LV2_Buf_Size_Access buf_size_access = {
NULL, sizeof(LV2_Buf_Size_Access), get_sample_count, get_buf_size
};
#endif
struct LV2Plugin::Impl {
Impl() : plugin(0), ui(0), ui_type(0), name(0), author(0), instance(0)
, work_iface(0)
@ -221,6 +262,12 @@ LV2Plugin::init(void* c_plugin, framecnt_t rate)
_work_schedule_feature.URI = LV2_WORKER__schedule;
_work_schedule_feature.data = NULL;
#ifdef HAVE_NEW_LV2
_buf_size_feature.URI = LV2_BUF_SIZE__access;
_buf_size_feature.data = &buf_size_access;
buf_size_access.handle = &_engine;
#endif
LilvPlugin* plugin = _impl->plugin;
LilvNode* state_iface_uri = lilv_new_uri(_world.world, LV2_STATE__interface);
@ -233,15 +280,21 @@ LV2Plugin::init(void* c_plugin, framecnt_t rate)
lilv_node_free(state_uri);
lilv_node_free(state_iface_uri);
_features = (LV2_Feature**)malloc(sizeof(LV2_Feature*) * 8);
_features = (LV2_Feature**)calloc(8, sizeof(LV2_Feature*));
_features[0] = &_instance_access_feature;
_features[1] = &_data_access_feature;
_features[2] = &_make_path_feature;
_features[3] = _uri_map.uri_map_feature();
_features[4] = _uri_map.urid_map_feature();
_features[5] = _uri_map.urid_unmap_feature();
_features[6] = NULL;
_features[7] = NULL;
unsigned n_features = 6;
#ifdef HAVE_NEW_LV2
_buf_size_feature.URI = LV2_BUF_SIZE__access;
_buf_size_feature.data = &buf_size_access;
buf_size_access.handle = &_engine;
_features[n_features++] = &_buf_size_feature;
#endif
LV2_State_Make_Path* make_path = (LV2_State_Make_Path*)malloc(
sizeof(LV2_State_Make_Path));
@ -257,7 +310,7 @@ LV2Plugin::init(void* c_plugin, framecnt_t rate)
schedule->handle = this;
schedule->schedule_work = work_schedule;
_work_schedule_feature.data = schedule;
_features[6] = &_work_schedule_feature;
_features[n_features++] = &_work_schedule_feature;
}
lilv_node_free(worker_schedule);

2
libs/ardour/wscript
View file

@ -258,6 +258,8 @@ def configure(conf):
if Options.options.lv2:
autowaf.check_pkg(conf, 'lv2', uselib_store='LV2',
atleast_version='1.0.0', mandatory=True)
autowaf.check_pkg(conf, 'lv2', uselib_store='NEW_LV2',
atleast_version='1.0.7', mandatory=False)
autowaf.check_pkg(conf, 'serd-0', uselib_store='SERD',
atleast_version='0.14.0', mandatory=True)
autowaf.check_pkg(conf, 'sord-0', uselib_store='SORD',