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/*************************************************************************** |
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* * |
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* Copyright (C) 2008 Andreas Persson * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, * |
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* MA 02110-1301 USA * |
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***************************************************************************/ |
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|
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#include <algorithm> |
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#include <cassert> |
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#include <cstdio> |
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#include <cstdlib> |
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#include <cstring> |
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#include <fstream> |
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#include <string> |
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|
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#include "PluginLv2.h" |
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|
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#define NS_ATOM "http://lv2plug.in/ns/ext/atom#" |
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#define NS_LS "http://linuxsampler.org/schema#" |
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|
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namespace { |
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|
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PluginLv2::PluginLv2(const LV2_Descriptor* Descriptor, |
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double SampleRate, const char* BundlePath, |
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const LV2_Feature* const* Features) { |
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Out[0] = 0; |
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Out[1] = 0; |
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UriMap = 0; |
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MapPath = 0; |
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MakePath = 0; |
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for (int i = 0 ; Features[i] ; i++) { |
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dmsg(2, ("linuxsampler: host feature: %s\n", Features[i]->URI)); |
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if (!strcmp(Features[i]->URI, LV2_URI_MAP_URI)) { |
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UriMap = (LV2_URI_Map_Feature*)Features[i]->data; |
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} else if (!strcmp(Features[i]->URI, LV2_STATE_MAP_PATH_URI)) { |
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MapPath = (LV2_State_Map_Path*)Features[i]->data; |
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} else if (!strcmp(Features[i]->URI, LV2_STATE_MAKE_PATH_URI)) { |
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MakePath = (LV2_State_Make_Path*)Features[i]->data; |
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} |
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} |
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|
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Init(SampleRate, 128); |
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|
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InitState(); |
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|
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DefaultState = GetState(); |
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} |
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|
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void PluginLv2::ConnectPort(uint32_t Port, void* DataLocation) { |
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if (Port == 2) { |
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MidiBuf = static_cast<LV2_Event_Buffer*>(DataLocation); |
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} else if (Port < 2) { |
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Out[Port] = static_cast<float*>(DataLocation); |
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} |
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} |
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|
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void PluginLv2::Activate() { |
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dmsg(2, ("linuxsampler: Activate\n")); |
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} |
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|
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void PluginLv2::Run(uint32_t SampleCount) { |
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int samplePos = 0; |
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uint8_t* events = MidiBuf->data; |
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int eventCount = MidiBuf->event_count; |
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while (SampleCount) { |
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int samples = std::min(SampleCount, 128U); |
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|
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for ( ; eventCount ; eventCount--) { |
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LV2_Event* event = reinterpret_cast<LV2_Event*>(events); |
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|
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int time = event->frames - samplePos; |
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if (time >= samples) break; |
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|
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uint8_t* data = events + sizeof(LV2_Event); |
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events += (sizeof(LV2_Event) + event->size + 7) & ~7; |
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|
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pMidiDevice->Port()->DispatchRaw(data, time); |
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} |
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pAudioDevice->Channel(0)->SetBuffer(Out[0] + samplePos); |
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pAudioDevice->Channel(1)->SetBuffer(Out[1] + samplePos); |
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pAudioDevice->Render(samples); |
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|
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samplePos += samples; |
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SampleCount -= samples; |
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} |
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} |
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|
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void PluginLv2::Deactivate() { |
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dmsg(2, ("linuxsampler: Deactivate\n")); |
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} |
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|
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String PluginLv2::PathToState(const String& path) { |
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if (MapPath) { |
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char* cstr = MapPath->abstract_path(MapPath->handle, |
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path.c_str()); |
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const String abstract_path(cstr); |
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free(cstr); |
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return abstract_path; |
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} |
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return path; |
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} |
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|
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String PluginLv2::PathFromState(const String& path) { |
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if (MapPath) { |
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char* cstr = MapPath->absolute_path(MapPath->handle, |
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path.c_str()); |
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const String abstract_path(cstr); |
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free(cstr); |
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return abstract_path; |
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} |
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return path; |
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} |
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|
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void PluginLv2::Save(LV2_State_Store_Function store, LV2_State_Handle handle) { |
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if (MakePath) { |
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char* path = MakePath->path(MapPath->handle, |
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"linuxsampler"); |
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dmsg(2, ("saving to file %s\n", path)); |
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|
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std::ofstream out(path); |
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out << GetState(); |
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|
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store(handle, |
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uri_to_id(NULL, NS_LS "state-file"), |
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path, |
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strlen(path) + 1, |
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uri_to_id(NULL, LV2_STATE_PATH_URI), |
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LV2_STATE_IS_PORTABLE); |
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} else { |
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dmsg(2, ("saving to string\n")); |
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|
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std::ostringstream out; |
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out << GetState(); |
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|
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store(handle, |
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uri_to_id(NULL, NS_LS "state-string"), |
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out.str().c_str(), |
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out.str().length() + 1, |
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uri_to_id(NULL, NS_ATOM "String"), |
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LV2_STATE_IS_POD | LV2_STATE_IS_PORTABLE); |
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} |
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dmsg(2, ("saving done\n")); |
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} |
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|
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void PluginLv2::Restore(LV2_State_Retrieve_Function retrieve, LV2_State_Handle handle) { |
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size_t size; |
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uint32_t type; |
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uint32_t flags; |
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|
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// Attempt to restore from state-file |
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const void* value = retrieve( |
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handle, |
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uri_to_id(NULL, NS_LS "state-file"), |
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&size, &type, &flags); |
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if (value) { |
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assert(type == uri_to_id(NULL, LV2_STATE_PATH_URI)); |
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const String path((const char*)value); |
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dmsg(2, ("linuxsampler: restoring from file %s\n", path.c_str())); |
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std::ifstream in(path.c_str()); |
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String state; |
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std::getline(in, state, '\0'); |
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SetState(state); |
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return; |
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} |
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|
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// Attempt to restore from state-string |
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value = retrieve( |
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handle, |
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uri_to_id(NULL, NS_LS "state-string"), |
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&size, &type, &flags); |
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if (value) { |
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dmsg(2, ("linuxsampler: restoring from string\n")); |
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assert(type == uri_to_id(NULL, NS_ATOM "String")); |
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String state((const char*)value); |
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SetState(state); |
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return; |
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} |
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|
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// No valid state found, reset to default state |
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dmsg(2, ("linuxsampler: restoring default state\n")); |
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SetState(DefaultState); |
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} |
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|
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LV2_Handle instantiate(const LV2_Descriptor* descriptor, |
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double sample_rate, const char* bundle_path, |
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const LV2_Feature* const* features) { |
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return new PluginLv2(descriptor, sample_rate, bundle_path, features); |
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} |
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|
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void connect_port(LV2_Handle instance, uint32_t port, void* data_location) { |
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static_cast<PluginLv2*>(instance)->ConnectPort(port, data_location); |
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} |
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|
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void activate(LV2_Handle instance) { |
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static_cast<PluginLv2*>(instance)->Activate(); |
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} |
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|
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void run(LV2_Handle instance, uint32_t sample_count) { |
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static_cast<PluginLv2*>(instance)->Run(sample_count); |
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} |
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|
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void deactivate(LV2_Handle instance) { |
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static_cast<PluginLv2*>(instance)->Deactivate(); |
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} |
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|
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void cleanup(LV2_Handle instance) { |
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delete static_cast<PluginLv2*>(instance); |
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} |
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void save(LV2_Handle handle, LV2_State_Store_Function store, LV2_State_Handle state, |
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uint32_t flags, const LV2_Feature* const* features) { |
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return static_cast<PluginLv2*>(handle)->Save(store, state); |
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} |
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|
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void restore(LV2_Handle handle, LV2_State_Retrieve_Function retrieve, LV2_State_Handle state, |
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uint32_t flags, const LV2_Feature* const* features) { |
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return static_cast<PluginLv2*>(handle)->Restore(retrieve, state); |
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} |
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|
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PluginInfo PluginInfo::Instance; |
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|
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PluginInfo::PluginInfo() { |
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Lv2.URI = "http://linuxsampler.org/plugins/linuxsampler"; |
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Lv2.activate = activate; |
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Lv2.cleanup = cleanup; |
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Lv2.connect_port = connect_port; |
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Lv2.deactivate = deactivate; |
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Lv2.instantiate = instantiate; |
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Lv2.run = run; |
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Lv2.extension_data = extension_data; |
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StateInterface.save = save; |
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StateInterface.restore = restore; |
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} |
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|
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|
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const void* extension_data(const char* uri) { |
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dmsg(2, ("linuxsampler: extension_data %s\n", uri)); |
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if (strcmp(uri, LV2_STATE_URI "#Interface") == 0) { |
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return PluginInfo::Lv2StateInterface(); |
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} |
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return 0; |
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} |
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} |
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|
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|
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extern "C" { |
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LV2_SYMBOL_EXPORT |
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const LV2_Descriptor* lv2_descriptor(uint32_t index) { |
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return index == 0 ? PluginInfo::Lv2Descriptor() : 0; |
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} |
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} |
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