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Diffstat (limited to 'src/server/Buffer.cpp')
| -rw-r--r-- | src/server/Buffer.cpp | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/server/Buffer.cpp b/src/server/Buffer.cpp new file mode 100644 index 00000000..a52b62eb --- /dev/null +++ b/src/server/Buffer.cpp @@ -0,0 +1,164 @@ +/* This file is part of Ingen. + * Copyright 2009-2012 David Robillard <http://drobilla.net> + * + * Ingen 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. + * + * Ingen 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 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., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#define __STDC_LIMIT_MACROS 1 + +#include <stdint.h> +#include <string.h> + +#include <algorithm> + +#include "ingen/shared/LV2Features.hpp" +#include "ingen/shared/LV2URIMap.hpp" +#include "ingen/shared/URIs.hpp" +#include "ingen/shared/World.hpp" +#include "ingen_config.h" +#include "lv2/lv2plug.in/ns/ext/atom/util.h" +#include "raul/log.hpp" + +#include "Buffer.hpp" +#include "Engine.hpp" + +namespace Ingen { +namespace Server { + +Buffer::Buffer(BufferFactory& bufs, LV2_URID type, uint32_t capacity) + : _factory(bufs) + , _type(type) + , _capacity(capacity) + , _next(NULL) + , _refs(0) +{ + if (capacity > UINT32_MAX) { + Raul::error << "Event buffer size " << capacity << " too large, aborting." + << std::endl; + throw std::bad_alloc(); + } + +#ifdef HAVE_POSIX_MEMALIGN + int ret = posix_memalign((void**)&_atom, 16, capacity); +#else + _atom = (LV2_Atom_Sequence*)malloc(capacity); + int ret = (_atom != NULL) ? 0 : -1; +#endif + + if (ret != 0) { + Raul::error << "Failed to allocate event buffer." << std::endl; + throw std::bad_alloc(); + } + + memset(_atom, 0, capacity); + _atom->type = type; + assert(_atom->type != 1); + + clear(); +} + +Buffer::~Buffer() +{ + free(_atom); +} + +void +Buffer::clear() +{ + _atom->size = 0; +} + +void +Buffer::copy(Context& context, const Buffer* src) +{ + // Copy only if src is a POD object that fits + if (src->_atom->type != 0 && sizeof(LV2_Atom) + src->_atom->size <= capacity()) { + memcpy(_atom, src->_atom, sizeof(LV2_Atom) + src->_atom->size); + } + assert(_atom->type != 1); +} + +void +Buffer::resize(uint32_t capacity) +{ + _atom = (LV2_Atom*)realloc(_atom, capacity); + _capacity = capacity; + clear(); +} + +void* +Buffer::port_data(PortType port_type, SampleCount offset) +{ + switch (port_type.symbol()) { + case PortType::CONTROL: + case PortType::CV: + case PortType::AUDIO: + assert(_atom->type == _type); + if (_atom->type == _factory.uris().atom_Float) { + return (float*)LV2_ATOM_BODY(_atom); + } else if (_atom->type == _factory.uris().atom_Sound) { + return (float*)LV2_ATOM_CONTENTS(LV2_Atom_Vector, _atom) + offset; + } else { + Raul::warn << "Audio data requested from non-audio buffer " << this << " :: " + << _atom->type << " - " + << _factory.engine().world()->lv2_uri_map()->unmap_uri(_atom->type) + << std::endl; + assert(false); + return NULL; + } + break; + default: + return _atom; + } +} + +const void* +Buffer::port_data(PortType port_type, SampleCount offset) const +{ + return const_cast<void*>( + const_cast<Buffer*>(this)->port_data(port_type, offset)); +} + +void +Buffer::prepare_write(Context& context) +{ + _atom->size = 0; +} + +bool +Buffer::append_event(int64_t frames, + uint32_t size, + uint32_t type, + const uint8_t* data) +{ + if (sizeof(LV2_Atom) + _atom->size + lv2_atom_pad_size(size) > _capacity) { + return false; + } + + LV2_Atom_Sequence* seq = (LV2_Atom_Sequence*)_atom; + LV2_Atom_Event* ev = (LV2_Atom_Event*)( + (uint8_t*)seq + sizeof(LV2_Atom) + lv2_atom_pad_size(seq->atom.size)); + + ev->time.frames = frames; + ev->body.size = size; + ev->body.type = type; + memcpy(LV2_ATOM_BODY(&ev->body), data, size); + + _atom->size += lv2_atom_pad_size(size); + + return true; +} + +} // namespace Server +} // namespace Ingen |