sdm/libs/core/core_impl.cpp

/*
* Copyright (c) 2014 - 2015, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
*    * Redistributions of source code must retain the above copyright notice, this list of
*      conditions and the following disclaimer.
*    * Redistributions in binary form must reproduce the above copyright notice, this list of
*      conditions and the following disclaimer in the documentation and/or other materials provided
*      with the distribution.
*    * Neither the name of The Linux Foundation nor the names of its contributors may be used to
*      endorse or promote products derived from this software without specific prior written
*      permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <dlfcn.h>
#include <utils/locker.h>
#include <utils/constants.h>
#include <utils/debug.h>

#include "core_impl.h"
#include "display_primary.h"
#include "display_hdmi.h"
#include "display_virtual.h"
#include "hw_info_interface.h"

#define __CLASS__ "CoreImpl"

namespace sdm {

CoreImpl::CoreImpl(CoreEventHandler *event_handler, BufferAllocator *buffer_allocator,
                   BufferSyncHandler *buffer_sync_handler)
  : event_handler_(event_handler), buffer_allocator_(buffer_allocator),
    buffer_sync_handler_(buffer_sync_handler), hw_resource_(NULL), hw_info_intf_(NULL),
    rotator_intf_(NULL), extension_lib_(NULL), extension_intf_(NULL),
    create_extension_intf_(NULL), destroy_extension_intf_(NULL) {
}

DisplayError CoreImpl::Init() {
  SCOPE_LOCK(locker_);
  DisplayError error = kErrorNone;

  // Try to load extension library & get handle to its interface.
  extension_lib_ = ::dlopen(EXTENSION_LIBRARY_NAME, RTLD_NOW);
  if (extension_lib_) {
    void **create_sym = reinterpret_cast<void **>(&create_extension_intf_);
    void **destroy_sym = reinterpret_cast<void **>(&destroy_extension_intf_);

    *create_sym = ::dlsym(extension_lib_, CREATE_EXTENSION_INTERFACE_NAME);
    *destroy_sym = ::dlsym(extension_lib_, DESTROY_EXTENSION_INTERFACE_NAME);

    if (!create_extension_intf_ || !destroy_extension_intf_) {
      DLOGE("Unable to load symbols");
      ::dlclose(extension_lib_);
      return kErrorUndefined;
    }

    error = create_extension_intf_(EXTENSION_VERSION_TAG, &extension_intf_);
    if(error != kErrorNone) {
      DLOGE("Unable to create interface");
      ::dlclose(extension_lib_);
      return error;
    }
  } else {
    DLOGW("Unable to load = %s", EXTENSION_LIBRARY_NAME);
  }

  error = HWInfoInterface::Create(&hw_info_intf_);
  if (error != kErrorNone) {
    goto CleanupOnError;
  }

  hw_resource_ = new HWResourceInfo();
  if (!hw_resource_) {
    error = kErrorMemory;
    goto CleanupOnError;
  }

  error = hw_info_intf_->GetHWResourceInfo(hw_resource_);
  if (error != kErrorNone) {
    goto CleanupOnError;
  }

  error = comp_mgr_.Init(*hw_resource_, extension_intf_);
  if (error != kErrorNone) {
    goto CleanupOnError;
  }

  if (extension_intf_) {
    error = extension_intf_->CreateRotator(buffer_allocator_, buffer_sync_handler_,
                                           &rotator_intf_);
    if (error != kErrorNone) {
      comp_mgr_.Deinit();
      goto CleanupOnError;
    }
  }

  return kErrorNone;

CleanupOnError:
  if (hw_info_intf_) {
    HWInfoInterface::Destroy(hw_info_intf_);
  }

  if (hw_resource_) {
    delete hw_resource_;
  }

  if (extension_lib_) {
    destroy_extension_intf_(extension_intf_);
    ::dlclose(extension_lib_);
  }

  return error;
}

DisplayError CoreImpl::Deinit() {
  SCOPE_LOCK(locker_);

  if (extension_intf_) {
    extension_intf_->DestroyRotator(rotator_intf_);
  }

  comp_mgr_.Deinit();
  HWInfoInterface::Destroy(hw_info_intf_);

  if (hw_resource_) {
    delete hw_resource_;
  }

  if (extension_lib_) {
    destroy_extension_intf_(extension_intf_);
    ::dlclose(extension_lib_);
  }

  return kErrorNone;
}

DisplayError CoreImpl::CreateDisplay(DisplayType type, DisplayEventHandler *event_handler,
                                     DisplayInterface **intf) {
  SCOPE_LOCK(locker_);

  if (!event_handler || !intf) {
    return kErrorParameters;
  }

  DisplayBase *display_base = NULL;

  switch (type) {
  case kPrimary:
    display_base = new DisplayPrimary(event_handler, hw_info_intf_, buffer_sync_handler_,
                                      &comp_mgr_, rotator_intf_);
    break;
  case kHDMI:
    display_base = new DisplayHDMI(event_handler, hw_info_intf_, buffer_sync_handler_,
                                   &comp_mgr_, rotator_intf_);
    break;
  case kVirtual:
    display_base = new DisplayVirtual(event_handler, hw_info_intf_, buffer_sync_handler_,
                                      &comp_mgr_, rotator_intf_);
    break;
  default:
    DLOGE("Spurious display type %d", type);
    return kErrorParameters;
  }

  if (!display_base) {
    return kErrorMemory;
  }

  DisplayError error = display_base->Init();
  if (error != kErrorNone) {
    display_base->Deinit();
    delete display_base;
    display_base = NULL;
    return error;
  }

  *intf = display_base;
  return kErrorNone;
}

DisplayError CoreImpl::DestroyDisplay(DisplayInterface *intf) {
  SCOPE_LOCK(locker_);

  if (!intf) {
    return kErrorParameters;
  }

  DisplayBase *display_base = static_cast<DisplayBase *>(intf);
  display_base->Deinit();
  delete display_base;
  display_base = NULL;

  return kErrorNone;
}

}  // namespace sdm