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/*
Copyright (C) 2011 Paul Davis
Author: David Robillard
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __ardour_lv2_state_h__
#define __ardour_lv2_state_h__
#include <stdint.h>
#include <stdlib.h>
#include <map>
#include <string>
#include "pbd/error.h"
#include "ardour/uri_map.h"
#include "lv2/lv2plug.in/ns/ext/state/state.h"
#include "rdff.h"
namespace ARDOUR {
class LV2Plugin;
struct LV2State {
LV2State(const LV2Plugin& plug, URIMap& map) : plugin(plug), uri_map(map) {}
struct Value {
inline Value(uint32_t k, const void* v, size_t s, uint32_t t, uint32_t f)
: key(k), value(v), size(s), type(t), flags(f)
{}
const uint32_t key;
const void* value;
const size_t size;
const uint32_t type;
const uint32_t flags;
};
typedef std::map<uint32_t, std::string> URIs;
typedef std::map<uint32_t, Value> Values;
uint32_t file_id_to_runtime_id(uint32_t file_id) const {
URIs::const_iterator i = uris.find(file_id);
if (i == uris.end()) {
PBD::error << "LV2 state refers to undefined URI ID" << endmsg;
return 0;
}
return uri_map.uri_to_id(NULL, i->second.c_str());
}
int add_uri(uint32_t file_id, const char* str) {
// TODO: check for clashes (invalid file)
uris.insert(std::make_pair(file_id, str));
return 0;
}
int add_value(uint32_t file_key,
const void* value,
size_t size,
uint32_t file_type,
uint32_t flags) {
const uint32_t key = file_id_to_runtime_id(file_key);
const uint32_t type = file_id_to_runtime_id(file_type);
if (!key || !type) {
PBD::error << "Invalid file key or type" << endmsg;
return 1;
}
Values::const_iterator i = values.find(key);
if (i != values.end()) {
PBD::error << "LV2 state contains duplicate keys" << endmsg;
return 1;
} else {
void* value_copy = malloc(size);
memcpy(value_copy, value, size); // FIXME: leak
values.insert(
std::make_pair(key,
Value(key, value_copy, size, type, flags)));
return 0;
}
}
void read(RDFF file) {
RDFFChunk* chunk = (RDFFChunk*)malloc(sizeof(RDFFChunk));
chunk->size = 0;
while (!rdff_read_chunk(file, &chunk)) {
if (rdff_chunk_is_uri(chunk)) {
RDFFURIChunk* body = (RDFFURIChunk*)chunk->data;
add_uri(body->id, body->uri);
} else if (rdff_chunk_is_triple(chunk)) {
RDFFTripleChunk* body = (RDFFTripleChunk*)chunk->data;
add_value(body->predicate,
body->object,
body->object_size,
body->object_type,
LV2_STATE_IS_POD | LV2_STATE_IS_PORTABLE);
}
}
free(chunk);
}
void write(RDFF file) {
// Write all referenced URIs to state file
for (URIs::const_iterator i = uris.begin(); i != uris.end(); ++i) {
rdff_write_uri(file,
i->first,
i->second.length(),
i->second.c_str());
}
// Write all values to state file
for (Values::const_iterator i = values.begin(); i != values.end(); ++i) {
const uint32_t key = i->first;
const LV2State::Value& val = i->second;
rdff_write_triple(file,
0,
key,
val.type,
val.size,
val.value);
}
}
const LV2Plugin& plugin;
URIMap& uri_map;
URIs uris;
Values values;
};
} // namespace ARDOUR
#endif /* __ardour_lv2_state_h__ */
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