mirror of
https://github.com/mikeoliphant/neural-amp-modeler-lv2.git
synced 2026-05-07 04:00:09 +02:00
Mike Oliphant
279 lines
7.6 KiB
C++
279 lines
7.6 KiB
C++
#include <algorithm>
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#include <cmath>
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#include <utility>
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#include "nam_plugin.h"
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#include "activations.h"
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namespace NAM {
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Plugin::Plugin()
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{
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// Turn on fast tanh approximation
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activations::Activation::enable_fast_tanh();
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}
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bool Plugin::initialize(double rate, const LV2_Feature* const* features) noexcept
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{
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for (size_t i = 0; features[i]; ++i) {
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if (std::string(features[i]->URI) == std::string(LV2_URID__map))
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map = static_cast<LV2_URID_Map*>(features[i]->data);
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else if (std::string(features[i]->URI) == std::string(LV2_WORKER__schedule))
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schedule = static_cast<LV2_Worker_Schedule*>(features[i]->data);
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else if (std::string(features[i]->URI) == std::string(LV2_LOG__log))
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logger.log = static_cast<LV2_Log_Log*>(features[i]->data);
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}
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lv2_log_logger_set_map(&logger, map);
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if (!map)
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{
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lv2_log_error(&logger, "Missing required feature: `%s`", LV2_URID__map);
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return false;
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}
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if (!schedule)
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{
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lv2_log_error(&logger, "Missing required feature: `%s`", LV2_WORKER__schedule);
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return false;
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}
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lv2_atom_forge_init(&atom_forge, map);
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uris.atom_Object = map->map(map->handle, LV2_ATOM__Object);
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uris.atom_Float = map->map(map->handle, LV2_ATOM__Float);
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uris.atom_Int = map->map(map->handle, LV2_ATOM__Int);
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uris.atom_Path = map->map(map->handle, LV2_ATOM__Path);
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uris.atom_URID = map->map(map->handle, LV2_ATOM__URID);
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uris.patch_Set = map->map(map->handle, LV2_PATCH__Set);
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uris.patch_Get = map->map(map->handle, LV2_PATCH__Get);
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uris.patch_property = map->map(map->handle, LV2_PATCH__property);
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uris.patch_value = map->map(map->handle, LV2_PATCH__value);
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uris.model_Path = map->map(map->handle, MODEL_URI);
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return true;
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}
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LV2_Worker_Status Plugin::work(LV2_Handle instance, LV2_Worker_Respond_Function respond, LV2_Worker_Respond_Handle handle,
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uint32_t size, const void* data)
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{
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auto atom = static_cast<const LV2_Atom*>(data);
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auto nam = static_cast<NAM::Plugin*>(instance);
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switch (*((const uint32_t*)data))
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{
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case kWorkTypeLoad:
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auto msg = reinterpret_cast<const LV2LoadModelMsg*>(data);
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auto nam = static_cast<NAM::Plugin*>(instance);
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try
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{
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// If we had a previous model, delete it
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if (nam->deleteModel)
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{
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nam->deleteModel.reset();
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}
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lv2_log_trace(&nam->logger, "Staging model change: `%s`\n", msg->path);
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nam->stagedModel = get_dsp(msg->path);
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nam->stagedModelPath = msg->path;
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LV2WorkType response = kWorkTypeSwitch;
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respond(handle, sizeof(response), &response);
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return LV2_WORKER_SUCCESS;
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}
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catch (std::exception& e)
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{
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lv2_log_error(&nam->logger, "Unable to load model from: '%s'\n", msg->path);
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}
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break;
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}
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return LV2_WORKER_ERR_UNKNOWN;
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}
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LV2_Worker_Status Plugin::work_response(LV2_Handle instance, uint32_t size, const void* data)
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{
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switch (*((const uint32_t*)data))
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{
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case kWorkTypeSwitch:
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try
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{
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auto nam = static_cast<NAM::Plugin*>(instance);
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std::swap(nam->currentModel, nam->stagedModel);
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nam->currentModelPath = nam->stagedModelPath;
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nam->deleteModel = std::move(nam->stagedModel);
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nam->write_set_patch(nam->currentModelPath);
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return LV2_WORKER_SUCCESS;
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}
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catch (std::exception& e)
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{
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}
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break;
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}
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return LV2_WORKER_ERR_UNKNOWN;
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}
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void Plugin::process(uint32_t n_samples) noexcept
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{
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if (ports.control)
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{
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LV2_ATOM_SEQUENCE_FOREACH(ports.control, event)
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{
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if (event->body.type == uris.atom_Object)
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{
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const auto obj = reinterpret_cast<LV2_Atom_Object*>(&event->body);
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if (obj->body.otype == uris.patch_Get) {
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lv2_atom_forge_frame_time(&atom_forge, 0);
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write_set_patch(currentModelPath);
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}
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if (obj->body.otype == uris.patch_Set)
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{
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const LV2_Atom* property = NULL;
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const LV2_Atom* file_path = NULL;
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lv2_atom_object_get(obj, uris.patch_property, &property, 0);
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if (property && (property->type == uris.atom_URID))
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{
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if (((const LV2_Atom_URID*)property)->body == uris.model_Path)
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{
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lv2_atom_object_get(obj, uris.patch_value, &file_path, 0);
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if (file_path && (file_path->size > 0) && (file_path->size < 1024))
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{
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LV2LoadModelMsg msg = { kWorkTypeLoad, {} };
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memcpy(msg.path, (const char*)LV2_ATOM_BODY_CONST(file_path), file_path->size);
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schedule->schedule_work(schedule->handle, sizeof(msg), &msg);
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}
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}
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}
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}
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}
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}
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}
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if (dblData.size() != n_samples)
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dblData.resize(n_samples);
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float inputLevel = powf(10, *(ports.input_level) * 0.05f);
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float outputLevel = powf(10, *(ports.output_level) * 0.05f);
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for (unsigned int i = 0; i < n_samples; i++)
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{
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dblData[i] = ports.audio_in[i] * inputLevel;
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}
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if (currentModel == nullptr)
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{
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}
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else
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{
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double* data = dblData.data();
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currentModel->process(&data, &data, 1, n_samples, 1.0, 1.0, mNAMParams);
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currentModel->finalize_(n_samples);
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}
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for (unsigned int i = 0; i < n_samples; i++)
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{
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ports.audio_out[i] = (float)(dblData[i] * outputLevel);
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}
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}
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LV2_State_Status Plugin::save(LV2_Handle instance, LV2_State_Store_Function store, LV2_State_Handle handle,
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uint32_t flags, const LV2_Feature* const* features)
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{
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auto nam = static_cast<NAM::Plugin*>(instance);
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lv2_log_trace(&nam->logger, "Saving state\n");
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if (!nam->currentModel) {
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return LV2_STATE_SUCCESS;
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}
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LV2_State_Map_Path* map_path = (LV2_State_Map_Path*)lv2_features_data(features, LV2_STATE__mapPath);
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// Map absolute sample path to an abstract state path
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char* apath = map_path->abstract_path(map_path->handle, nam->currentModelPath.c_str());
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store(handle, nam->uris.model_Path, apath, strlen(apath) + 1, nam->uris.atom_Path,
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LV2_STATE_IS_POD | LV2_STATE_IS_PORTABLE);
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#ifndef _WIN32 // https://github.com/drobilla/lilv/issues/14
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free(apath);
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#endif
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return LV2_STATE_SUCCESS;
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}
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LV2_State_Status Plugin::restore(LV2_Handle instance, LV2_State_Retrieve_Function retrieve, LV2_State_Handle handle,
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uint32_t flags, const LV2_Feature* const* features)
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{
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auto nam = static_cast<NAM::Plugin*>(instance);
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// Get model_Path from state
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size_t size = 0;
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uint32_t type = 0;
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uint32_t valflags = 0;
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const void* value = retrieve(handle, nam->uris.model_Path, &size, &type, &valflags);
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lv2_log_trace(&nam->logger, "Restoring model '%s'\n", value);
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if (!value) {
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lv2_log_error(&nam->logger, "Missing model_Path\n");
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return LV2_STATE_ERR_NO_PROPERTY;
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}
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if (type != nam->uris.atom_Path) {
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lv2_log_error(&nam->logger, "Non-path model_Path\n");
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return LV2_STATE_ERR_BAD_TYPE;
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}
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LV2_State_Map_Path* map_path = (LV2_State_Map_Path*)lv2_features_data(features, LV2_STATE__mapPath);
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// Map abstract state path to absolute path
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char* path = map_path->absolute_path(map_path->handle, (const char *)value);
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// Schedule model to be loaded by the provided worker
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NAM::LV2LoadModelMsg msg = { NAM::kWorkTypeLoad, {} };
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memcpy(msg.path, path, size);
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nam->schedule->schedule_work(nam->schedule->handle, sizeof(msg), &msg);
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#ifndef _WIN32 // https://github.com/drobilla/lilv/issues/14
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free(path);
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#endif
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return LV2_STATE_SUCCESS;
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}
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LV2_Atom_Forge_Ref Plugin::write_set_patch( std::string filename)
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{
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LV2_Atom_Forge_Frame frame;
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LV2_Atom_Forge_Ref set =
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lv2_atom_forge_object(&atom_forge, &frame, 0, uris.patch_Set);
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lv2_atom_forge_key(&atom_forge, uris.patch_property);
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lv2_atom_forge_urid(&atom_forge, uris.model_Path);
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lv2_atom_forge_key(&atom_forge, uris.patch_value);
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lv2_atom_forge_path(&atom_forge, filename.c_str(), filename.length());
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lv2_atom_forge_pop(&atom_forge, &frame);
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return set;
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}
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}
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