generator/wasm/wasm_dynamic_dsp_aux.cpp

/************************************************************************
 ************************************************************************
    FAUST compiler
    Copyright (C) 2003-2014 GRAME, Centre National de Creation Musicale
    ---------------------------------------------------------------------
    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.
 ************************************************************************
 ************************************************************************/

#ifdef WIN32
#pragma warning(disable : 4251 4275 4800)
#endif

#include "wasm_dynamic_dsp_aux.hh"
#include "Text.hh"
#include "compatibility.hh"

#ifdef WIN32
#define strdup _strdup
#endif

#ifdef EMCC
#include <emscripten.h>
#include <emscripten/bind.h>
using namespace emscripten;
#endif

wasm_dsp_factory* wasm_dynamic_dsp_factory::createWasmDSPFactoryFromString2(const string&         name_app,
                                                                            const string&         dsp_content,
                                                                            const vector<string>& argv,
                                                                            bool                  internal_memory)
{
    int         argc1 = 0;
    const char* argv1[64];
    for (size_t i = 0; i < argv.size(); i++) {
        argv1[argc1++] = argv[i].c_str();
    }
    argv1[argc1] = nullptr;  // NULL terminated argv

    return createWasmDSPFactoryFromString(name_app, dsp_content, argc1, argv1,
                                                               wasm_dsp_factory::gErrorMessage, internal_memory);
}

std::string wasm_dynamic_dsp_factory::generateWasmFromString2(const std::string&           name_app,
                                                            const std::string&              dsp_content,
                                                            const std::vector<std::string>& argv,
                                                            bool                            internal_memory)
{
    int         argc1 = 0;
    const char* argv1[64];
    for (size_t i = 0; i < argv.size(); i++) {
        argv1[argc1++] = argv[i].c_str();
    }
    argv1[argc1] = nullptr;  // NULL terminated argv

    return generateWasmFromString(name_app, dsp_content, argc1, argv1,wasm_dsp_factory::gErrorMessage, internal_memory);
}

// C++ API

EXPORT wasm_dsp_factory* createWasmDSPFactoryFromFile(const string& filename, int argc, const char* argv[],
                                                      string& error_msg, bool internal_memory)
{
    string base = basename((char*)filename.c_str());
    size_t pos  = filename.find(".dsp");

    if (pos != string::npos) {
        return createWasmDSPFactoryFromString(base.substr(0, pos), pathToContent(filename), argc, argv, error_msg,
                                              internal_memory);
    } else {
        error_msg = "ERROR : file extension is not the one expected (.dsp expected)\n";
        return nullptr;
    }
}

EXPORT wasm_dsp_factory* createWasmDSPFactoryFromString(const string& name_app, const string& dsp_content, int argc,
                                                        const char* argv[], string& error_msg, bool internal_memory)
{
    string expanded_dsp_content, sha_key;

    if ((expanded_dsp_content = sha1FromDSP(name_app, dsp_content, argc, argv, sha_key)) == "") {
        return nullptr;
    } else {
        int         argc1 = 0;
        const char* argv1[64];
        argv1[argc1++] = "faust";
        argv1[argc1++] = "-lang";
        // argv1[argc1++] = (internal_memory) ? "wasm-i" : "wasm-e";
        argv1[argc1++] = (internal_memory) ? "wasm-ib" : "wasm-eb";
        argv1[argc1++] = "-o";
        argv1[argc1++] = "binary";
        // Copy argument
        for (int i = 0; i < argc; i++) {
            argv1[argc1++] = argv[i];
        }
        argv1[argc1] = nullptr;  // NULL terminated argv

        dsp_factory_base* dsp_factory_aux = createFactory(name_app.c_str(), dsp_content.c_str(), argc1, argv1, error_msg, true);
        if (dsp_factory_aux) {
            dsp_factory_aux->setName(name_app);
            wasm_dsp_factory* factory = new wasm_dsp_factory(dsp_factory_aux);
            wasm_dsp_factory::gWasmFactoryTable.setFactory(factory);
            factory->setSHAKey(sha_key);
            factory->setDSPCode(expanded_dsp_content);
            return factory;
        } else {
            return nullptr;
        }
    }
}

EXPORT wasm_dsp_factory* createWasmDSPFactoryFromSignals(const std::string& name_app, tvec signals,
                                                         int argc, const char* argv[], std::string& error_msg,
                                                         bool internal_memory)
{
    int         argc1 = 0;
    const char* argv1[64];
    argv1[argc1++] = "faust";
    argv1[argc1++] = "-lang";
    // argv1[argc1++] = (internal_memory) ? "wasm-i" : "wasm-e";
    argv1[argc1++] = (internal_memory) ? "wasm-ib" : "wasm-eb";
    argv1[argc1++] = "-o";
    argv1[argc1++] = "binary";
    // Copy argument
    for (int i = 0; i < argc; i++) {
        argv1[argc1++] = argv[i];
    }
    argv1[argc1] = nullptr;  // NULL terminated argv

    dsp_factory_base* dsp_factory_aux = createFactory(name_app.c_str(), signals, argc1, argv1, error_msg);
    if (dsp_factory_aux) {
        dsp_factory_aux->setName(name_app);
        wasm_dsp_factory* factory = new wasm_dsp_factory(dsp_factory_aux);
        wasm_dsp_factory::gWasmFactoryTable.setFactory(factory);
        return factory;
    } else {
        return nullptr;
    }
}

EXPORT std::string generateWasmFromString(const string& name_app, const string& dsp_content, int argc,
                                         const char* argv[], string& error_msg, bool internal_memory)
{
    int         argc1 = 0;
    const char* argv1[64];
    argv1[argc1++] = "faust";
    argv1[argc1++] = "-lang";
    // argv1[argc1++] = (internal_memory) ? "wasm-i" : "wasm-e";
    argv1[argc1++] = (internal_memory) ? "wasm-ib" : "wasm-eb";
    argv1[argc1++] = "-o";
    argv1[argc1++] = "binary";
    for (int i = 0; i < argc; i++) {
        argv1[argc1++] = argv[i];
    }
    argv1[argc1] = nullptr;  // NULL terminated argv

    dsp_factory_base* dsp_factory_aux = createFactory(name_app.c_str(), dsp_content.c_str(), argc1, argv1, error_msg, true);
    return (dsp_factory_aux) ? dsp_factory_aux->getBinaryCode() : "";
}

#ifdef __cplusplus
extern "C" {
#endif

EXPORT void deleteAllWasmCDSPFactories()
{
    deleteAllWasmDSPFactories();
}

EXPORT wasm_dsp_factory* createWasmCDSPFactoryFromFile2(const char* filename, int argc, const char* argv[],
                                                        char* error_msg, bool internal_memory)
{
    string error_msg_aux;
    wasm_dsp_factory* factory = createWasmDSPFactoryFromFile(filename, argc, argv, error_msg_aux, internal_memory);
    strncpy(error_msg, error_msg_aux.c_str(), 4096);
    return factory;
}

EXPORT wasm_dsp_factory* createWasmCDSPFactoryFromString2(const char* name_app, const char* dsp_content, int argc,
                                                          const char* argv[], char* error_msg, bool internal_memory)
{
    string error_msg_aux;
    wasm_dsp_factory* factory =
        createWasmDSPFactoryFromString(name_app, dsp_content, argc, argv, error_msg_aux, internal_memory);
    strncpy(error_msg, error_msg_aux.c_str(), 4096);
    return factory;
}

EXPORT wasm_dsp_factory* createWasmCDSPFactoryFromSignals2(const char* name_app, tvec signals,
                                                           int argc, const char* argv[], char* error_msg,
                                                           bool internal_memory)
{
    string error_msg_aux;
    wasm_dsp_factory* factory =
        createWasmDSPFactoryFromSignals(name_app, signals, argc, argv, error_msg_aux, internal_memory);
    strncpy(error_msg, error_msg_aux.c_str(), 4096);
    return factory;
}

static WasmModule* createWasmCDSPFactoryAux(wasm_dsp_factory* factory, const string& error_msg_aux, char* error_msg)
{
    strncpy(error_msg, error_msg_aux.c_str(), 4096);
    if (factory) {
        WasmModule* res = static_cast<WasmModule*>(calloc(1, sizeof(WasmModule)));

        // 'Binary' string, so directly copy its raw content
        string code = factory->getBinaryCode();
        res->fWASMCodeSize = (int)code.size();
        res->fWASMCode     = (char*)malloc(res->fWASMCodeSize);
        memcpy(res->fWASMCode, code.c_str(), res->fWASMCodeSize);

        stringstream dst2;
        factory->writeHelper(&dst2, false, false);
        res->fJSHelpers = strdup(flatten(dst2.str()).c_str());

        return res;
        // And keep factory...
    } else {
        return nullptr;
    }
}

EXPORT WasmModule* createWasmCDSPFactoryFromFile(const char* filename, int argc, const char* argv[], char* error_msg,
                                                 bool internal_memory)
{
    string            error_msg_aux;
    wasm_dsp_factory* factory = createWasmDSPFactoryFromFile(filename, argc, argv, error_msg_aux, internal_memory);
    return createWasmCDSPFactoryAux(factory, error_msg_aux, error_msg);
}

EXPORT WasmModule* createWasmCDSPFactoryFromString(const char* name_app, const char* dsp_content, int argc,
                                                   const char* argv[], char* error_msg, bool internal_memory)
{
    string            error_msg_aux;
    wasm_dsp_factory* factory =
        createWasmDSPFactoryFromString(name_app, dsp_content, argc, argv, error_msg_aux, internal_memory);
    return createWasmCDSPFactoryAux(factory, error_msg_aux, error_msg);
}

EXPORT const char* getWasmCModule(WasmModule* module)
{
    return module->fWASMCode;
}

EXPORT int getWasmCModuleSize(WasmModule* module)
{
    return module->fWASMCodeSize;
}

EXPORT const char* getWasmCHelpers(WasmModule* module)
{
    return module->fJSHelpers;
}

EXPORT void freeWasmCModule(WasmModule* module)
{
    free((void*)module->fWASMCode);
    free((void*)module->fJSHelpers);
    free(module);
}

#ifdef __cplusplus
}
#endif

#ifdef EMCC

vector<string> makeStringVector()
{
    return vector<string>();
}

EMSCRIPTEN_BINDINGS(CLASS_wasm_dynamic_dsp_factory)
{
    emscripten::function("makeStringVector", &makeStringVector);
    register_vector<string>("vector<string>");
    class_<wasm_dynamic_dsp_factory>("wasm_dynamic_dsp_factory")
        .constructor()
        .class_function("createWasmDSPFactoryFromString2", &wasm_dynamic_dsp_factory::createWasmDSPFactoryFromString2,
                        allow_raw_pointers())
        .class_function("generateWasmFromString2", &wasm_dynamic_dsp_factory::createWasmDSPFactoryFromString2,
                    allow_raw_pointers());
}

#endif