| 1 |
/*************************************************************************** |
| 2 |
* * |
| 3 |
* Copyright (C) 2008 - 2012 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 |
#define _BSD_SOURCE 1 /* for realpath() */ |
| 22 |
|
| 23 |
#include <algorithm> |
| 24 |
#include <cassert> |
| 25 |
#include <cstdio> |
| 26 |
#include <cstdlib> |
| 27 |
#include <cstring> |
| 28 |
#include <fstream> |
| 29 |
#include <string> |
| 30 |
|
| 31 |
#include "PluginLv2.h" |
| 32 |
|
| 33 |
#include <lv2/lv2plug.in/ns/ext/atom/util.h> |
| 34 |
#include <lv2/lv2plug.in/ns/ext/midi/midi.h> |
| 35 |
|
| 36 |
#define NS_LS "http://linuxsampler.org/schema#" |
| 37 |
|
| 38 |
#define CHANNELS 32 |
| 39 |
|
| 40 |
namespace { |
| 41 |
|
| 42 |
PluginLv2::PluginLv2(const LV2_Descriptor* Descriptor, |
| 43 |
double SampleRate, const char* BundlePath, |
| 44 |
const LV2_Feature* const* Features) { |
| 45 |
Out = new float*[CHANNELS]; |
| 46 |
for (int i = 0 ; i < CHANNELS ; i++) { |
| 47 |
Out[i] = 0; |
| 48 |
} |
| 49 |
UriMap = 0; |
| 50 |
MapPath = 0; |
| 51 |
MakePath = 0; |
| 52 |
for (int i = 0 ; Features[i] ; i++) { |
| 53 |
dmsg(2, ("linuxsampler: init feature: %s\n", Features[i]->URI)); |
| 54 |
if (!strcmp(Features[i]->URI, LV2_URID__map)) { |
| 55 |
UriMap = (LV2_URID_Map*)Features[i]->data; |
| 56 |
} else if (!strcmp(Features[i]->URI, LV2_STATE__mapPath)) { |
| 57 |
MapPath = (LV2_State_Map_Path*)Features[i]->data; |
| 58 |
} else if (!strcmp(Features[i]->URI, LV2_STATE__makePath)) { |
| 59 |
MakePath = (LV2_State_Make_Path*)Features[i]->data; |
| 60 |
} |
| 61 |
} |
| 62 |
|
| 63 |
MidiEventType = uri_to_id(LV2_MIDI__MidiEvent); |
| 64 |
|
| 65 |
Init(SampleRate, 128, CHANNELS); |
| 66 |
|
| 67 |
InitState(); |
| 68 |
|
| 69 |
DefaultState = GetState(); |
| 70 |
} |
| 71 |
|
| 72 |
PluginLv2::~PluginLv2() { |
| 73 |
delete[] Out; |
| 74 |
} |
| 75 |
|
| 76 |
void PluginLv2::ConnectPort(uint32_t Port, void* DataLocation) { |
| 77 |
if (Port == 0) { |
| 78 |
MidiBuf = static_cast<LV2_Atom_Sequence*>(DataLocation); |
| 79 |
} else if (Port < CHANNELS + 1) { |
| 80 |
Out[Port - 1] = static_cast<float*>(DataLocation); |
| 81 |
} |
| 82 |
} |
| 83 |
|
| 84 |
void PluginLv2::Activate() { |
| 85 |
dmsg(2, ("linuxsampler: Activate\n")); |
| 86 |
} |
| 87 |
|
| 88 |
void PluginLv2::Run(uint32_t SampleCount) { |
| 89 |
int samplePos = 0; |
| 90 |
|
| 91 |
LV2_Atom_Event* ev = lv2_atom_sequence_begin(&MidiBuf->body); |
| 92 |
|
| 93 |
while (SampleCount) { |
| 94 |
int samples = std::min(SampleCount, 128U); |
| 95 |
|
| 96 |
for ( ; !lv2_atom_sequence_is_end(&MidiBuf->body, |
| 97 |
MidiBuf->atom.size, ev) ; |
| 98 |
ev = lv2_atom_sequence_next(ev)) { |
| 99 |
if (ev->body.type == MidiEventType) { |
| 100 |
|
| 101 |
int time = ev->time.frames - samplePos; |
| 102 |
if (time >= samples) break; |
| 103 |
|
| 104 |
uint8_t* data = reinterpret_cast<uint8_t*>(ev + 1); |
| 105 |
|
| 106 |
pMidiDevice->Port()->DispatchRaw(data, time); |
| 107 |
} |
| 108 |
} |
| 109 |
for (int i = 0 ; i < CHANNELS ; i++) { |
| 110 |
pAudioDevice->Channel(i)->SetBuffer(Out[i] + samplePos); |
| 111 |
} |
| 112 |
pAudioDevice->Render(samples); |
| 113 |
|
| 114 |
samplePos += samples; |
| 115 |
SampleCount -= samples; |
| 116 |
} |
| 117 |
} |
| 118 |
|
| 119 |
void PluginLv2::Deactivate() { |
| 120 |
dmsg(2, ("linuxsampler: Deactivate\n")); |
| 121 |
} |
| 122 |
|
| 123 |
static String RealPath(const String& path) |
| 124 |
{ |
| 125 |
String out = path; |
| 126 |
char* cpath = NULL; |
| 127 |
#ifdef _WIN32 |
| 128 |
cpath = (char*)malloc(MAX_PATH); |
| 129 |
GetFullPathName(path.c_str(), MAX_PATH, cpath, NULL); |
| 130 |
#else |
| 131 |
cpath = realpath(path.c_str(), NULL); |
| 132 |
#endif |
| 133 |
if (cpath) { |
| 134 |
out = cpath; |
| 135 |
free(cpath); |
| 136 |
} |
| 137 |
return out; |
| 138 |
} |
| 139 |
|
| 140 |
String PluginLv2::PathToState(const String& path) { |
| 141 |
if (MapPath) { |
| 142 |
char* cstr = MapPath->abstract_path(MapPath->handle, path.c_str()); |
| 143 |
const String abstract_path(cstr); |
| 144 |
free(cstr); |
| 145 |
return abstract_path; |
| 146 |
} |
| 147 |
return path; |
| 148 |
} |
| 149 |
|
| 150 |
String PluginLv2::PathFromState(const String& path) { |
| 151 |
if (MapPath) { |
| 152 |
char* cstr = MapPath->absolute_path(MapPath->handle, path.c_str()); |
| 153 |
// Resolve symbolic links so SFZ sample paths load correctly |
| 154 |
const String absolute_path(RealPath(cstr)); |
| 155 |
free(cstr); |
| 156 |
return absolute_path; |
| 157 |
} |
| 158 |
return path; |
| 159 |
} |
| 160 |
|
| 161 |
void PluginLv2::SetStateFeatures(const LV2_Feature* const* Features) |
| 162 |
{ |
| 163 |
for (int i = 0 ; Features[i] ; i++) { |
| 164 |
dmsg(2, ("linuxsampler: state feature: %s\n", Features[i]->URI)); |
| 165 |
if (!strcmp(Features[i]->URI, LV2_STATE__mapPath)) { |
| 166 |
MapPath = (LV2_State_Map_Path*)Features[i]->data; |
| 167 |
} else if (!strcmp(Features[i]->URI, LV2_STATE__makePath)) { |
| 168 |
MakePath = (LV2_State_Make_Path*)Features[i]->data; |
| 169 |
} |
| 170 |
} |
| 171 |
} |
| 172 |
|
| 173 |
LV2_State_Status PluginLv2::Save( |
| 174 |
LV2_State_Store_Function store, LV2_State_Handle handle, |
| 175 |
uint32_t flags, const LV2_Feature* const* features) |
| 176 |
{ |
| 177 |
LV2_State_Map_Path* OldMapPath = MapPath; |
| 178 |
LV2_State_Make_Path* OldMakePath = MakePath; |
| 179 |
SetStateFeatures(features); |
| 180 |
|
| 181 |
if (MakePath && MapPath) { |
| 182 |
char* abs_path = MakePath->path(MakePath->handle, "linuxsampler"); |
| 183 |
dmsg(2, ("saving to file %s\n", abs_path)); |
| 184 |
|
| 185 |
std::ofstream out(abs_path); |
| 186 |
out << GetState(); |
| 187 |
|
| 188 |
char* path = MapPath->abstract_path(MapPath->handle, abs_path); |
| 189 |
|
| 190 |
store(handle, |
| 191 |
uri_to_id(NS_LS "state-file"), |
| 192 |
path, |
| 193 |
strlen(path) + 1, |
| 194 |
uri_to_id(LV2_ATOM__Path), |
| 195 |
LV2_STATE_IS_PORTABLE); |
| 196 |
|
| 197 |
free(path); |
| 198 |
free(abs_path); |
| 199 |
} else { |
| 200 |
dmsg(2, ("saving to string\n")); |
| 201 |
|
| 202 |
std::ostringstream out; |
| 203 |
out << GetState(); |
| 204 |
|
| 205 |
store(handle, |
| 206 |
uri_to_id(NS_LS "state-string"), |
| 207 |
out.str().c_str(), |
| 208 |
out.str().length() + 1, |
| 209 |
uri_to_id(LV2_ATOM__String), |
| 210 |
LV2_STATE_IS_POD | LV2_STATE_IS_PORTABLE); |
| 211 |
} |
| 212 |
dmsg(2, ("saving done\n")); |
| 213 |
|
| 214 |
MapPath = OldMapPath; |
| 215 |
MakePath = OldMakePath; |
| 216 |
|
| 217 |
return LV2_STATE_SUCCESS; |
| 218 |
} |
| 219 |
|
| 220 |
LV2_State_Status PluginLv2::Restore( |
| 221 |
LV2_State_Retrieve_Function retrieve, LV2_State_Handle handle, |
| 222 |
uint32_t rflags, const LV2_Feature* const* features) |
| 223 |
{ |
| 224 |
LV2_State_Map_Path* OldMapPath = MapPath; |
| 225 |
LV2_State_Make_Path* OldMakePath = MakePath; |
| 226 |
SetStateFeatures(features); |
| 227 |
|
| 228 |
size_t size; |
| 229 |
uint32_t type; |
| 230 |
uint32_t flags; |
| 231 |
|
| 232 |
const void* value = retrieve( |
| 233 |
handle, |
| 234 |
uri_to_id(NS_LS "state-file"), |
| 235 |
&size, &type, &flags); |
| 236 |
if (value) { |
| 237 |
// Restore from state-file |
| 238 |
assert(type == uri_to_id(LV2_ATOM__Path)); |
| 239 |
const String path((const char*)value); |
| 240 |
dmsg(2, ("linuxsampler: restoring from file %s\n", path.c_str())); |
| 241 |
std::ifstream in(path.c_str()); |
| 242 |
String state; |
| 243 |
std::getline(in, state, '\0'); |
| 244 |
SetState(state); |
| 245 |
} else if ((value = retrieve(handle, |
| 246 |
uri_to_id(NS_LS "state-string"), |
| 247 |
&size, &type, &flags))) { |
| 248 |
// Restore from state-string |
| 249 |
dmsg(2, ("linuxsampler: restoring from string\n")); |
| 250 |
assert(type == uri_to_id(LV2_ATOM__String)); |
| 251 |
String state((const char*)value); |
| 252 |
SetState(state); |
| 253 |
} else { |
| 254 |
// No valid state found, reset to default state |
| 255 |
dmsg(2, ("linuxsampler: restoring default state\n")); |
| 256 |
SetState(DefaultState); |
| 257 |
} |
| 258 |
|
| 259 |
MapPath = OldMapPath; |
| 260 |
MakePath = OldMakePath; |
| 261 |
|
| 262 |
return LV2_STATE_SUCCESS; |
| 263 |
} |
| 264 |
|
| 265 |
LV2_Handle instantiate(const LV2_Descriptor* descriptor, |
| 266 |
double sample_rate, const char* bundle_path, |
| 267 |
const LV2_Feature* const* features) { |
| 268 |
return new PluginLv2(descriptor, sample_rate, bundle_path, features); |
| 269 |
} |
| 270 |
|
| 271 |
void connect_port(LV2_Handle instance, uint32_t port, void* data_location) { |
| 272 |
static_cast<PluginLv2*>(instance)->ConnectPort(port, data_location); |
| 273 |
} |
| 274 |
|
| 275 |
void activate(LV2_Handle instance) { |
| 276 |
static_cast<PluginLv2*>(instance)->Activate(); |
| 277 |
} |
| 278 |
|
| 279 |
void run(LV2_Handle instance, uint32_t sample_count) { |
| 280 |
static_cast<PluginLv2*>(instance)->Run(sample_count); |
| 281 |
} |
| 282 |
|
| 283 |
void deactivate(LV2_Handle instance) { |
| 284 |
static_cast<PluginLv2*>(instance)->Deactivate(); |
| 285 |
} |
| 286 |
|
| 287 |
void cleanup(LV2_Handle instance) { |
| 288 |
delete static_cast<PluginLv2*>(instance); |
| 289 |
} |
| 290 |
|
| 291 |
LV2_State_Status save(LV2_Handle handle, LV2_State_Store_Function store, |
| 292 |
LV2_State_Handle state, |
| 293 |
uint32_t flags, const LV2_Feature* const* features) { |
| 294 |
return static_cast<PluginLv2*>(handle)->Save( |
| 295 |
store, state, flags, features); |
| 296 |
} |
| 297 |
|
| 298 |
LV2_State_Status restore(LV2_Handle handle, LV2_State_Retrieve_Function retrieve, |
| 299 |
LV2_State_Handle state, |
| 300 |
uint32_t flags, const LV2_Feature* const* features) { |
| 301 |
return static_cast<PluginLv2*>(handle)->Restore( |
| 302 |
retrieve, state, flags, features); |
| 303 |
} |
| 304 |
|
| 305 |
PluginInfo PluginInfo::Instance; |
| 306 |
|
| 307 |
PluginInfo::PluginInfo() { |
| 308 |
Lv2.URI = "http://linuxsampler.org/plugins/linuxsampler"; |
| 309 |
Lv2.activate = activate; |
| 310 |
Lv2.cleanup = cleanup; |
| 311 |
Lv2.connect_port = connect_port; |
| 312 |
Lv2.deactivate = deactivate; |
| 313 |
Lv2.instantiate = instantiate; |
| 314 |
Lv2.run = run; |
| 315 |
Lv2.extension_data = extension_data; |
| 316 |
StateInterface.save = save; |
| 317 |
StateInterface.restore = restore; |
| 318 |
} |
| 319 |
|
| 320 |
|
| 321 |
const void* extension_data(const char* uri) { |
| 322 |
dmsg(2, ("linuxsampler: extension_data %s\n", uri)); |
| 323 |
if (strcmp(uri, LV2_STATE__interface) == 0) { |
| 324 |
return PluginInfo::Lv2StateInterface(); |
| 325 |
} |
| 326 |
return 0; |
| 327 |
} |
| 328 |
} |
| 329 |
|
| 330 |
|
| 331 |
extern "C" { |
| 332 |
LV2_SYMBOL_EXPORT |
| 333 |
const LV2_Descriptor* lv2_descriptor(uint32_t index) { |
| 334 |
return index == 0 ? PluginInfo::Lv2Descriptor() : 0; |
| 335 |
} |
| 336 |
} |
Parent Directory
| 
Revision Log