################################################################################
# Copyright (c) 2023 - 2024 Advanced Micro Devices, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
################################################################################

cmake_minimum_required (VERSION 3.5)
project(videodecodemultifiles)
set(CMAKE_CXX_STANDARD 17)

# ROCM Path
if(DEFINED ENV{ROCM_PATH})
  set(ROCM_PATH $ENV{ROCM_PATH} CACHE PATH "${White}${PROJECT_NAME}: Default ROCm installation path${ColourReset}")
elseif(ROCM_PATH)
  message("-- ${White}${PROJECT_NAME} :ROCM_PATH Set -- ${ROCM_PATH}${ColourReset}")
else()
  set(ROCM_PATH /opt/rocm CACHE PATH "${White}${PROJECT_NAME}: Default ROCm installation path${ColourReset}")
endif()

list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/../../cmake)
list(APPEND CMAKE_PREFIX_PATH ${ROCM_PATH}/hip ${ROCM_PATH})
set(CMAKE_CXX_COMPILER ${ROCM_PATH}/llvm/bin/clang++)

# rocDecode sample build type
set(DEFAULT_BUILD_TYPE "Release")
if(NOT CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}" CACHE STRING "rocDecode Default Build Type" FORCE)
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release")
endif()
if(CMAKE_BUILD_TYPE MATCHES Debug)
  # -O0 -- Don't Optimize output file 
  # -gdwarf-4  -- generate debugging information, dwarf-4 for making valgrind work
  # -Og -- Optimize for debugging experience rather than speed or size
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O0 -gdwarf-4 -Og")
else()
  # -O3       -- Optimize output file 
  # -DNDEBUG  -- turn off asserts 
  # -fPIC     -- Generate position-independent code if possible
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3 -DNDEBUG -fPIC")
endif()

find_package(HIP QUIET)
find_package(FFmpeg QUIET)
# find rocDecode
find_library(ROCDECODE_LIBRARY NAMES rocdecode HINTS ${ROCM_PATH}/lib)
find_path(ROCDECODE_INCLUDE_DIR NAMES rocdecode.h PATHS /opt/rocm/include/rocdecode ${ROCM_PATH}/include/rocdecode)
if(ROCDECODE_LIBRARY AND ROCDECODE_INCLUDE_DIR)
    set(ROCDECODE_FOUND TRUE)
    message("-- ${White}${PROJECT_NAME}: Using rocDecode -- \n\tLibraries:${ROCDECODE_LIBRARY} \n\tIncludes:${ROCDECODE_INCLUDE_DIR}${ColourReset}")
endif()

if(HIP_FOUND AND FFMPEG_FOUND AND ROCDECODE_FOUND)
    # HIP
    set(LINK_LIBRARY_LIST ${LINK_LIBRARY_LIST} hip::host)
    # FFMPEG
    include_directories(${AVUTIL_INCLUDE_DIR} ${AVCODEC_INCLUDE_DIR}
                        ${AVFORMAT_INCLUDE_DIR})
    set(LINK_LIBRARY_LIST ${LINK_LIBRARY_LIST} ${FFMPEG_LIBRARIES})
    # rocDecode and utils
    include_directories (${ROCDECODE_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR}/../../utils ${CMAKE_CURRENT_SOURCE_DIR}/../../utils/rocvideodecode)
    set(LINK_LIBRARY_LIST ${LINK_LIBRARY_LIST} ${ROCDECODE_LIBRARY})
    # sample app exe
    list(APPEND SOURCES ${PROJECT_SOURCE_DIR} videodecodemultifiles.cpp ${CMAKE_CURRENT_SOURCE_DIR}/../../utils/rocvideodecode/roc_video_dec.cpp)
    add_executable(${PROJECT_NAME} ${SOURCES})
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++17")
    target_link_libraries(${PROJECT_NAME} ${LINK_LIBRARY_LIST})
    # FFMPEG multi-version support
    if(_FFMPEG_AVCODEC_VERSION VERSION_LESS_EQUAL 58.134.100)
      target_compile_definitions(${PROJECT_NAME} PUBLIC USE_AVCODEC_GREATER_THAN_58_134=0)
    else()
      target_compile_definitions(${PROJECT_NAME} PUBLIC USE_AVCODEC_GREATER_THAN_58_134=1)
    endif()
else()
    message("-- ERROR!: ${PROJECT_NAME} excluded! please install all the dependencies and try again!")
    if (NOT HIP_FOUND)
        message(FATAL_ERROR "-- ERROR!: HIP Not Found! - please install ROCm and HIP!")
    endif()
    if (NOT FFMPEG_FOUND)
        message(FATAL_ERROR "-- ERROR!: FFMPEG Not Found! - please install FFMPEG!")
    endif()
    if (NOT ROCDECODE_FOUND)
        message(FATAL_ERROR "-- ERROR!: rocDecode Not Found! - please install rocDecode!")
    endif()
endif()