| 1 |
/*************************************************************************** |
| 2 |
* * |
| 3 |
* Copyright (C) 2008 Andreas Persson * |
| 4 |
* * |
| 5 |
* This program is free software; you can redistribute it and/or modify * |
| 6 |
* it under the terms of the GNU General Public License as published by * |
| 7 |
* the Free Software Foundation; either version 2 of the License, or * |
| 8 |
* (at your option) any later version. * |
| 9 |
* * |
| 10 |
* This program is distributed in the hope that it will be useful, * |
| 11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 13 |
* GNU General Public License for more details. * |
| 14 |
* * |
| 15 |
* You should have received a copy of the GNU General Public License * |
| 16 |
* along with this program; if not, write to the Free Software * |
| 17 |
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, * |
| 18 |
* MA 02110-1301 USA * |
| 19 |
***************************************************************************/ |
| 20 |
|
| 21 |
#include <algorithm> |
| 22 |
#include <cassert> |
| 23 |
#include <cstdio> |
| 24 |
#include <cstdlib> |
| 25 |
#include <cstring> |
| 26 |
#include <fstream> |
| 27 |
#include <string> |
| 28 |
|
| 29 |
#include "PluginLv2.h" |
| 30 |
|
| 31 |
#define NS_ATOM "http://lv2plug.in/ns/ext/atom#" |
| 32 |
#define NS_LS "http://linuxsampler.org/schema#" |
| 33 |
|
| 34 |
namespace { |
| 35 |
|
| 36 |
PluginLv2::PluginLv2(const LV2_Descriptor* Descriptor, |
| 37 |
double SampleRate, const char* BundlePath, |
| 38 |
const LV2_Feature* const* Features) { |
| 39 |
Out[0] = 0; |
| 40 |
Out[1] = 0; |
| 41 |
UriMap = 0; |
| 42 |
PathSupport = 0; |
| 43 |
NewFileSupport = 0; |
| 44 |
for (int i = 0 ; Features[i] ; i++) { |
| 45 |
dmsg(2, ("linuxsampler: host feature: %s\n", Features[i]->URI)); |
| 46 |
if (!strcmp(Features[i]->URI, LV2_URI_MAP_URI)) { |
| 47 |
UriMap = (LV2_URI_Map_Feature*)Features[i]->data; |
| 48 |
} else if (!strcmp(Features[i]->URI, LV2_FILES_PATH_SUPPORT_URI)) { |
| 49 |
PathSupport = (LV2_Files_Path_Support*)Features[i]->data; |
| 50 |
} else if (!strcmp(Features[i]->URI, LV2_FILES_NEW_FILE_SUPPORT_URI)) { |
| 51 |
NewFileSupport = (LV2_Files_New_File_Support*)Features[i]->data; |
| 52 |
} |
| 53 |
} |
| 54 |
|
| 55 |
Init(SampleRate, 128); |
| 56 |
|
| 57 |
InitState(); |
| 58 |
|
| 59 |
DefaultState = GetState(); |
| 60 |
} |
| 61 |
|
| 62 |
void PluginLv2::ConnectPort(uint32_t Port, void* DataLocation) { |
| 63 |
if (Port == 2) { |
| 64 |
MidiBuf = static_cast<LV2_Event_Buffer*>(DataLocation); |
| 65 |
} else if (Port < 2) { |
| 66 |
Out[Port] = static_cast<float*>(DataLocation); |
| 67 |
} |
| 68 |
} |
| 69 |
|
| 70 |
void PluginLv2::Activate() { |
| 71 |
dmsg(2, ("linuxsampler: Activate\n")); |
| 72 |
} |
| 73 |
|
| 74 |
void PluginLv2::Run(uint32_t SampleCount) { |
| 75 |
int samplePos = 0; |
| 76 |
uint8_t* events = MidiBuf->data; |
| 77 |
int eventCount = MidiBuf->event_count; |
| 78 |
while (SampleCount) { |
| 79 |
int samples = std::min(SampleCount, 128U); |
| 80 |
|
| 81 |
for ( ; eventCount ; eventCount--) { |
| 82 |
LV2_Event* event = reinterpret_cast<LV2_Event*>(events); |
| 83 |
|
| 84 |
int time = event->frames - samplePos; |
| 85 |
if (time >= samples) break; |
| 86 |
|
| 87 |
uint8_t* data = events + sizeof(LV2_Event); |
| 88 |
events += (sizeof(LV2_Event) + event->size + 7) & ~7; |
| 89 |
|
| 90 |
pMidiDevice->Port()->DispatchRaw(data, time); |
| 91 |
} |
| 92 |
pAudioDevice->Channel(0)->SetBuffer(Out[0] + samplePos); |
| 93 |
pAudioDevice->Channel(1)->SetBuffer(Out[1] + samplePos); |
| 94 |
pAudioDevice->Render(samples); |
| 95 |
|
| 96 |
samplePos += samples; |
| 97 |
SampleCount -= samples; |
| 98 |
} |
| 99 |
} |
| 100 |
|
| 101 |
void PluginLv2::Deactivate() { |
| 102 |
dmsg(2, ("linuxsampler: Deactivate\n")); |
| 103 |
} |
| 104 |
|
| 105 |
String PluginLv2::PathToState(const String& path) { |
| 106 |
if (PathSupport) { |
| 107 |
char* cstr = PathSupport->abstract_path(PathSupport->host_data, |
| 108 |
path.c_str()); |
| 109 |
const String abstract_path(cstr); |
| 110 |
free(cstr); |
| 111 |
return abstract_path; |
| 112 |
} |
| 113 |
return path; |
| 114 |
} |
| 115 |
|
| 116 |
String PluginLv2::PathFromState(const String& path) { |
| 117 |
if (PathSupport) { |
| 118 |
char* cstr = PathSupport->absolute_path(PathSupport->host_data, |
| 119 |
path.c_str()); |
| 120 |
const String abstract_path(cstr); |
| 121 |
free(cstr); |
| 122 |
return abstract_path; |
| 123 |
} |
| 124 |
return path; |
| 125 |
} |
| 126 |
|
| 127 |
void PluginLv2::Save(LV2_Persist_Store_Function store, void* host_data) { |
| 128 |
if (NewFileSupport) { |
| 129 |
char* path = NewFileSupport->new_file_path(PathSupport->host_data, |
| 130 |
"linuxsampler"); |
| 131 |
dmsg(2, ("saving to file %s\n", path)); |
| 132 |
|
| 133 |
std::ofstream out(path); |
| 134 |
out << GetState(); |
| 135 |
|
| 136 |
const String abstract_path = PathToState(path); |
| 137 |
|
| 138 |
store(host_data, |
| 139 |
uri_to_id(NULL, NS_LS "state-file"), |
| 140 |
abstract_path.c_str(), |
| 141 |
abstract_path.length() + 1, |
| 142 |
uri_to_id(NULL, LV2_FILES_URI "#AbstractPath"), |
| 143 |
LV2_PERSIST_IS_PORTABLE); |
| 144 |
} else { |
| 145 |
dmsg(2, ("saving to string\n")); |
| 146 |
|
| 147 |
std::ostringstream out; |
| 148 |
out << GetState(); |
| 149 |
|
| 150 |
store(host_data, |
| 151 |
uri_to_id(NULL, NS_LS "state-string"), |
| 152 |
out.str().c_str(), |
| 153 |
out.str().length() + 1, |
| 154 |
uri_to_id(NULL, NS_ATOM "String"), |
| 155 |
LV2_PERSIST_IS_POD | LV2_PERSIST_IS_PORTABLE); |
| 156 |
} |
| 157 |
dmsg(2, ("saving done\n")); |
| 158 |
} |
| 159 |
|
| 160 |
void PluginLv2::Restore(LV2_Persist_Retrieve_Function retrieve, void* data) { |
| 161 |
size_t size; |
| 162 |
uint32_t type; |
| 163 |
uint32_t flags; |
| 164 |
|
| 165 |
const void* value = retrieve( |
| 166 |
data, |
| 167 |
uri_to_id(NULL, NS_LS "state-file"), |
| 168 |
&size, &type, &flags); |
| 169 |
|
| 170 |
if (value) { |
| 171 |
assert(type == uri_to_id(NULL, LV2_FILES_URI "#AbstractPath")); |
| 172 |
const String path = PathFromState((const char*)value); |
| 173 |
dmsg(2, ("linuxsampler: restoring from file %s\n", path.c_str())); |
| 174 |
std::ifstream in(path.c_str()); |
| 175 |
String state; |
| 176 |
std::getline(in, state, '\0'); |
| 177 |
SetState(state); |
| 178 |
return; |
| 179 |
} |
| 180 |
|
| 181 |
value = retrieve( |
| 182 |
data, |
| 183 |
uri_to_id(NULL, NS_LS "state-string"), |
| 184 |
&size, &type, &flags); |
| 185 |
if (value) { |
| 186 |
dmsg(2, ("linuxsampler: restoring from string\n")); |
| 187 |
assert(type == uri_to_id(NULL, NS_ATOM "String")); |
| 188 |
String state((const char*)value); |
| 189 |
SetState(state); |
| 190 |
return; |
| 191 |
} |
| 192 |
|
| 193 |
// No valid state found, reset to default state |
| 194 |
dmsg(2, ("linuxsampler: restoring default state\n")); |
| 195 |
SetState(DefaultState); |
| 196 |
} |
| 197 |
|
| 198 |
LV2_Handle instantiate(const LV2_Descriptor* descriptor, |
| 199 |
double sample_rate, const char* bundle_path, |
| 200 |
const LV2_Feature* const* features) { |
| 201 |
return new PluginLv2(descriptor, sample_rate, bundle_path, features); |
| 202 |
} |
| 203 |
|
| 204 |
void connect_port(LV2_Handle instance, uint32_t port, void* data_location) { |
| 205 |
static_cast<PluginLv2*>(instance)->ConnectPort(port, data_location); |
| 206 |
} |
| 207 |
|
| 208 |
void activate(LV2_Handle instance) { |
| 209 |
static_cast<PluginLv2*>(instance)->Activate(); |
| 210 |
} |
| 211 |
|
| 212 |
void run(LV2_Handle instance, uint32_t sample_count) { |
| 213 |
static_cast<PluginLv2*>(instance)->Run(sample_count); |
| 214 |
} |
| 215 |
|
| 216 |
void deactivate(LV2_Handle instance) { |
| 217 |
static_cast<PluginLv2*>(instance)->Deactivate(); |
| 218 |
} |
| 219 |
|
| 220 |
void cleanup(LV2_Handle instance) { |
| 221 |
delete static_cast<PluginLv2*>(instance); |
| 222 |
} |
| 223 |
|
| 224 |
void save(LV2_Handle handle, LV2_Persist_Store_Function store, void* callback_data) { |
| 225 |
return static_cast<PluginLv2*>(handle)->Save(store, callback_data); |
| 226 |
} |
| 227 |
|
| 228 |
void restore(LV2_Handle handle, LV2_Persist_Retrieve_Function store, void* callback_data) { |
| 229 |
return static_cast<PluginLv2*>(handle)->Restore(store, callback_data); |
| 230 |
} |
| 231 |
|
| 232 |
PluginInfo PluginInfo::Instance; |
| 233 |
|
| 234 |
PluginInfo::PluginInfo() { |
| 235 |
Lv2.URI = "http://linuxsampler.org/plugins/linuxsampler"; |
| 236 |
Lv2.activate = activate; |
| 237 |
Lv2.cleanup = cleanup; |
| 238 |
Lv2.connect_port = connect_port; |
| 239 |
Lv2.deactivate = deactivate; |
| 240 |
Lv2.instantiate = instantiate; |
| 241 |
Lv2.run = run; |
| 242 |
Lv2.extension_data = extension_data; |
| 243 |
Persist.save = save; |
| 244 |
Persist.restore = restore; |
| 245 |
} |
| 246 |
|
| 247 |
|
| 248 |
const void* extension_data(const char* uri) { |
| 249 |
dmsg(2, ("linuxsampler: extension_data %s\n", uri)); |
| 250 |
if (strcmp(uri, LV2_PERSIST_URI) == 0) { |
| 251 |
return PluginInfo::Lv2PersistDescriptor(); |
| 252 |
} |
| 253 |
return 0; |
| 254 |
} |
| 255 |
} |
| 256 |
|
| 257 |
|
| 258 |
extern "C" { |
| 259 |
LV2_SYMBOL_EXPORT |
| 260 |
const LV2_Descriptor* lv2_descriptor(uint32_t index) { |
| 261 |
return index == 0 ? PluginInfo::Lv2Descriptor() : 0; |
| 262 |
} |
| 263 |
} |
Parent Directory
| 
Revision Log