Function reallocAudioBufferList

distrho/src/DistrhoPluginAU.cpp:2429–2476

   #if DISTRHO_PLUGIN_NUM_INPUTS + DISTRHO_PLUGIN_NUM_OUTPUTS != 0
    bool reallocAudioBufferList(const bool alloc)
    {
        if (fAudioBufferList != nullptr)
        {
            for (uint16_t i = 0; i < fAudioBufferList->mNumberBuffers; ++i)
                delete[] static_cast<float*>(fAudioBufferList->mBuffers[i].mData);
        }

      #ifdef DISTRHO_PLUGIN_EXTRA_IO
       #if DISTRHO_PLUGIN_NUM_INPUTS != 0 && DISTRHO_PLUGIN_NUM_OUTPUTS != 0
        const uint16_t numBuffers = std::max(fNumInputs, fNumOutputs);
       #elif DISTRHO_PLUGIN_NUM_INPUTS != 0
        const uint16_t numBuffers = fNumInputs;
       #else
        const uint16_t numBuffers = fNumOutputs;
       #endif
      #else
        constexpr const uint16_t numBuffers = d_max(DISTRHO_PLUGIN_NUM_INPUTS, DISTRHO_PLUGIN_NUM_OUTPUTS);
      #endif
        const uint32_t bufferSize = fPlugin.getBufferSize();

        if (! alloc)
        {
            std::free(fAudioBufferList);
            fAudioBufferList = nullptr;
            return true;
        }

        if (AudioBufferList* const abl = static_cast<AudioBufferList*>(
            std::realloc(fAudioBufferList, sizeof(uint32_t) + sizeof(AudioBuffer) * numBuffers)))
        {
            abl->mNumberBuffers = numBuffers;

            for (uint16_t i = 0; i < numBuffers; ++i)
            {
                abl->mBuffers[i].mNumberChannels = 1;
                abl->mBuffers[i].mData = new float[bufferSize];
                abl->mBuffers[i].mDataByteSize = sizeof(float) * bufferSize;
            }

            fAudioBufferList = abl;
            return true;
        }

        std::free(fAudioBufferList);
        fAudioBufferList = nullptr;
        return false;
    }
   #endif

    // ----------------------------------------------------------------------------------------------------------------