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/*
* Copyright (C) 2021 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2021 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-plugin-fw
* Created on: 12 нояб. 2021 г.
*
* lsp-plugin-fw is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-plugin-fw 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-plugin-fw. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_PLUG_FW_WRAP_LV2_SINK_H_
#define LSP_PLUG_IN_PLUG_FW_WRAP_LV2_SINK_H_
#include <lsp-plug.in/plug-fw/version.h>
#include <lsp-plug.in/plug-fw/wrap/lv2/lv2.h>
#include <lsp-plug.in/common/status.h>
#include <lsp-plug.in/stdlib/stdlib.h>
namespace lsp
{
namespace lv2
{
typedef struct lv2_sink
{
uint8_t *buf;
size_t size;
size_t cap;
status_t res;
LV2_Atom stub;
static LV2_Atom_Forge_Ref sink(LV2_Atom_Forge_Sink_Handle handle, const void *buf, uint32_t size)
{
lv2_sink *_this = reinterpret_cast<lv2_sink *>(handle);
if (_this->res != STATUS_OK)
return 0;
size_t offset = _this->size;
size_t capacity = offset + size;
if (capacity > _this->cap)
{
capacity += (capacity >> 1);
uint8_t *ptr = reinterpret_cast<uint8_t *>(::realloc(_this->buf, capacity));
if (ptr == NULL) {
_this->res = STATUS_NO_MEM;
return 0;
}
_this->buf = ptr;
_this->cap = capacity;
}
::memcpy(&_this->buf[offset], buf, size);
_this->size += size;
// From LV2 spec:
// Note that 0 is an invalid reference, so if you are using a buffer offset be
// sure to offset it such that 0 is never a valid reference. You will get
// confusing errors otherwise.
// So we will add the sizeof(LV2_Atom) for this case
return offset + sizeof(LV2_Atom);
}
static LV2_Atom *deref(LV2_Atom_Forge_Sink_Handle handle, LV2_Atom_Forge_Ref ref)
{
lv2_sink *_this = reinterpret_cast<lv2_sink *>(handle);
if (_this->res == STATUS_OK)
{
// From LV2 spec:
// Note that 0 is an invalid reference, so if you are using a buffer offset be
// sure to offset it such that 0 is never a valid reference. You will get
// confusing errors otherwise.
// So we will subtract the sizeof(LV2_Atom) for this case
return reinterpret_cast<LV2_Atom *>(&_this->buf[ref - sizeof(LV2_Atom)]);
}
return &_this->stub;
}
explicit lv2_sink(size_t capacity = 0x100)
{
buf = NULL;
size = 0;
cap = capacity;
res = STATUS_OK;
stub.size = 0;
stub.type = 0;
if (cap > 0)
{
buf = reinterpret_cast<uint8_t *>(::malloc(capacity));
if (buf == NULL)
res = STATUS_NO_MEM;
}
}
~lv2_sink()
{
if (buf != NULL)
{
::free(buf);
buf = NULL;
}
size = 0;
cap = 0;
}
} lv2_sink;
} /* namespace lv2 */
} /* namespace lsp */
#endif /* LSP_PLUG_IN_PLUG_FW_WRAP_LV2_SINK_H_ */
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