JUCE/modules/juce_audio_plugin_client/detail/juce_PluginUtilities.cpp

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.

   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy

   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#include <juce_audio_plugin_client/detail/juce_PluginUtilities.h>

#if JUCE_WINDOWS
 #include <windows.h>
#endif

namespace juce::detail
{

#if JucePlugin_Build_Unity
bool isRunningInUnity();
bool isRunningInUnity()    { return PluginHostType::getPluginLoadedAs() == AudioProcessor::wrapperType_Unity; }
#endif

#if VST3_REPLACEMENT_AVAILABLE

// NB: Nasty old-fashioned code in here because it's copied from the Steinberg example code.
void PluginUtilities::getUUIDForVST2ID (bool forControllerUID, uint8 uuid[16])
{
    #if JUCE_MSVC
     const auto juce_sprintf = [] (auto&& head, auto&&... tail) { sprintf_s (head, numElementsInArray (head), tail...); };
     const auto juce_strcpy  = [] (auto&& head, auto&&... tail) { strcpy_s  (head, numElementsInArray (head), tail...); };
     const auto juce_strcat  = [] (auto&& head, auto&&... tail) { strcat_s  (head, numElementsInArray (head), tail...); };
     const auto juce_sscanf  = [] (auto&&... args)              { sscanf_s  (args...); };
    #else
     const auto juce_sprintf = [] (auto&& head, auto&&... tail) { snprintf  (head, (size_t) numElementsInArray (head), tail...); };
     const auto juce_strcpy  = [] (auto&&... args)              { strcpy    (args...); };
     const auto juce_strcat  = [] (auto&&... args)              { strcat    (args...); };
     const auto juce_sscanf  = [] (auto&&... args)              { sscanf    (args...); };
    #endif

    char uidString[33];

    const int vstfxid = (('V' << 16) | ('S' << 8) | (forControllerUID ? 'E' : 'T'));
    char vstfxidStr[7] = { 0 };
    juce_sprintf (vstfxidStr, "%06X", vstfxid);

    juce_strcpy (uidString, vstfxidStr);

    char uidStr[9] = { 0 };
    juce_sprintf (uidStr, "%08X", JucePlugin_VSTUniqueID);
    juce_strcat (uidString, uidStr);

    char nameidStr[3] = { 0 };
    const size_t len = strlen (JucePlugin_Name);

    for (size_t i = 0; i <= 8; ++i)
    {
        juce::uint8 c = i < len ? static_cast<juce::uint8> (JucePlugin_Name[i]) : 0;

        if (c >= 'A' && c <= 'Z')
            c += 'a' - 'A';

        juce_sprintf (nameidStr, "%02X", c);
        juce_strcat (uidString, nameidStr);
    }

    unsigned long p0;
    unsigned int p1, p2;
    unsigned int p3[8];

    juce_sscanf (uidString, "%08lX%04X%04X%02X%02X%02X%02X%02X%02X%02X%02X",
                 &p0, &p1, &p2, &p3[0], &p3[1], &p3[2], &p3[3], &p3[4], &p3[5], &p3[6], &p3[7]);

    union q0_u {
        uint32 word;
        uint8 bytes[4];
    } q0;

    union q1_u {
        uint16 half;
        uint8 bytes[2];
    } q1, q2;

    q0.word = static_cast<uint32> (p0);
    q1.half = static_cast<uint16> (p1);
    q2.half = static_cast<uint16> (p2);

    // VST3 doesn't use COM compatible UUIDs on non windows platforms
   #if ! JUCE_WINDOWS
    q0.word = ByteOrder::swap (q0.word);
    q1.half = ByteOrder::swap (q1.half);
    q2.half = ByteOrder::swap (q2.half);
   #endif

    for (int i = 0; i < 4; ++i)
        uuid[i+0] = q0.bytes[i];

    for (int i = 0; i < 2; ++i)
        uuid[i+4] = q1.bytes[i];

    for (int i = 0; i < 2; ++i)
        uuid[i+6] = q2.bytes[i];

    for (int i = 0; i < 8; ++i)
        uuid[i+8] = static_cast<uint8> (p3[i]);
}
#endif

#if JucePlugin_Build_VST
bool PluginUtilities::handleManufacturerSpecificVST2Opcode ([[maybe_unused]] int32 index,
                                                            [[maybe_unused]] pointer_sized_int value,
                                                            [[maybe_unused]] void* ptr,
                                                            float)
{
   #if VST3_REPLACEMENT_AVAILABLE
    if ((index == (int32) ByteOrder::bigEndianInt ("stCA") || index == (int32) ByteOrder::bigEndianInt ("stCa"))
        && value == (int32) ByteOrder::bigEndianInt ("FUID") && ptr != nullptr)
    {
        uint8 fuid[16];
        getUUIDForVST2ID  (false, fuid);
        ::memcpy (ptr, fuid, 16);
        return true;
    }
   #endif
    return false;
}
#endif

} // namespace juce