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-rw-r--r--src/server/mix.cpp114
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diff --git a/src/server/mix.cpp b/src/server/mix.cpp
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+/*
+ This file is part of Ingen.
+ Copyright 2007-2012 David Robillard <http://drobilla.net/>
+
+ Ingen is free software: you can redistribute it and/or modify it under the
+ terms of the GNU Affero General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or 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 Affero General Public License for details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with Ingen. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ingen/shared/URIs.hpp"
+#include "raul/log.hpp"
+
+#include "AudioBuffer.hpp"
+#include "Buffer.hpp"
+#include "Context.hpp"
+
+namespace Ingen {
+namespace Server {
+
+static inline bool
+is_audio(Shared::URIs& uris, LV2_URID type)
+{
+ return type == uris.atom_Float || type == uris.atom_Sound;
+}
+
+static inline void
+audio_accumulate(Context& context, AudioBuffer* dst, const AudioBuffer* src)
+{
+ Sample* const dst_buf = dst->data();
+ const Sample* const src_buf = src->data();
+
+ if (dst->is_control()) {
+ if (src->is_control()) { // control => control
+ dst_buf[0] += src_buf[0];
+ } else { // audio => control
+ dst_buf[0] += src_buf[context.offset()];
+ }
+ } else {
+ const SampleCount end = context.offset() + context.nframes();
+ if (src->is_control()) { // control => audio
+ for (SampleCount i = context.offset(); i < end; ++i) {
+ dst_buf[i] += src_buf[0];
+ }
+ } else { // audio => audio
+ for (SampleCount i = context.offset(); i < end; ++i) {
+ dst_buf[i] += src_buf[i];
+ }
+ }
+ }
+}
+
+void
+mix(Context& context,
+ Shared::URIs& uris,
+ Buffer* dst,
+ const Buffer*const* srcs,
+ uint32_t num_srcs)
+{
+ if (num_srcs == 1) {
+ dst->copy(context, srcs[0]);
+ } else if (is_audio(uris, dst->type())) {
+ // Copy the first source
+ dst->copy(context, srcs[0]);
+
+ // Mix in the rest
+ for (uint32_t i = 1; i < num_srcs; ++i) {
+ assert(is_audio(uris, srcs[i]->type()));
+ audio_accumulate(context,
+ (AudioBuffer*)dst,
+ (const AudioBuffer*)srcs[i]);
+ }
+ } else {
+ std::cerr << "FIXME: event mix" << std::endl;
+ }
+#if 0
+ case PortType::EVENTS:
+ dst->clear();
+ for (uint32_t i = 0; i < num_srcs; ++i) {
+ assert(srcs[i]->type() == PortType::EVENTS);
+ srcs[i]->rewind();
+ }
+
+ while (true) {
+ const EventBuffer* first = NULL;
+ for (uint32_t i = 0; i < num_srcs; ++i) {
+ const EventBuffer* const src = (const EventBuffer*)srcs[i];
+ if (src->is_valid()) {
+ if (!first || src->get_event()->frames < first->get_event()->frames)
+ first = src;
+ }
+ }
+ if (first) {
+ const LV2_Event* const ev = first->get_event();
+ ((EventBuffer*)dst)->append(
+ ev->frames, ev->subframes, ev->type, ev->size,
+ (const uint8_t*)ev + sizeof(LV2_Event));
+ first->increment();
+ } else {
+ break;
+ }
+ }
+ dst->rewind();
+#endif
+}
+
+} // namespace Server
+} // namespace Ingen