################################################################################
# Copyright (c) 2023 - 2026 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 3.10)
# ROCM Path
if(DEFINED ENV{ROCM_PATH})
  set(ROCM_PATH $ENV{ROCM_PATH} CACHE PATH "Default ROCm installation path")
elseif(ROCM_PATH)
  message("-- INFO:ROCM_PATH Set -- ${ROCM_PATH}")
else()
  set(ROCM_PATH /opt/rocm CACHE PATH "Default ROCm installation path")
endif()

# Check if lib/rocm_sysdeps/lib exists in the ROCm path which indicates ROCm installation via TheRock
set(USING_THE_ROCK OFF)
if(EXISTS "${ROCM_PATH}/lib/rocm_sysdeps/lib")
  set(USING_THE_ROCK ON)
endif()

if(USING_THE_ROCK)
  if(NOT DEFINED ENV{HIP_DEVICE_LIB_PATH})
    set(ENV{HIP_DEVICE_LIB_PATH} ${ROCM_PATH}/lib/llvm/amdgcn/bitcode)
    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "HIP_DEVICE_LIB_PATH=${ROCM_PATH}/lib/llvm/amdgcn/bitcode")
  endif()
endif()

# Set AMD Clang as default compiler
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED On)
set(CMAKE_CXX_EXTENSIONS ON)
if (NOT DEFINED CMAKE_CXX_COMPILER)
  set(CMAKE_C_COMPILER ${ROCM_PATH}/lib/llvm/bin/amdclang)
  set(CMAKE_CXX_COMPILER ${ROCM_PATH}/lib/llvm/bin/amdclang++)
endif()

project(videodecodergb)

list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/../../cmake)
list(APPEND CMAKE_PREFIX_PATH ${ROCM_PATH}/lib/cmake ${ROCM_PATH}/share/rocmcmakebuildtools/cmake)

# rocdecode sample build type
set(DEFAULT_BUILD_TYPE "Release")
if(NOT CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}" CACHE STRING "rocdecode Default Build Type" FORCE)
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release")
endif()
if(CMAKE_BUILD_TYPE MATCHES Debug)
  # -O0 -- Don't Optimize output file 
  # -gdwarf-4  -- generate debugging information, dwarf-4 for making valgrind work
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O0 -gdwarf-4")
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()

# Set supported GPU Targets
if(NOT GPU_TARGETS AND NOT AMDGPU_TARGETS)
    find_package(ROCmCMakeBuildTools QUIET)
    if(NOT ROCmCMakeBuildTools_FOUND)
        find_package(ROCM QUIET)
    endif()
    include(ROCMCheckTargetIds OPTIONAL RESULT_VARIABLE HAS_ROCM_CHECK_TARGET_IDS)

    set(OPTIONAL_GPU_TARGETS "gfx950;gfx1151;gfx1200;gfx1201")
    if(HAS_ROCM_CHECK_TARGET_IDS)
        rocm_check_target_ids(OPTIONAL_GPU_TARGETS_AVAILABLE TARGETS ${OPTIONAL_GPU_TARGETS})
    else() # if we don't have rocm_check_target_ids, just assume the targets are available
        set(OPTIONAL_GPU_TARGETS_AVAILABLE "${OPTIONAL_GPU_TARGETS}")
    endif()
    set(DEFAULT_GPU_TARGETS "gfx908;gfx90a;gfx942;gfx1030;gfx1031;gfx1032;gfx1100;gfx1101;gfx1102;${OPTIONAL_GPU_TARGETS_AVAILABLE}")
endif()

# Set AMD GPU_TARGETS
if((AMDGPU_TARGETS OR DEFINED ENV{AMDGPU_TARGETS}) AND (NOT GPU_TARGETS))
  message("-- ${Red}${PROJECT_NAME} DEPRECATION -- AMDGPU_TARGETS use is deprecated. Use GPU_TARGETS${ColourReset}")
  if(DEFINED ENV{AMDGPU_TARGETS})
    set(GPU_TARGETS $ENV{AMDGPU_TARGETS} CACHE STRING "List of specific machine types for library to target")
  else()
    set(GPU_TARGETS ${AMDGPU_TARGETS})
  endif()
endif()

if(DEFINED ENV{GPU_ARCHS})
  set(GPU_TARGETS $ENV{GPU_ARCHS} CACHE STRING "List of specific machine types for library to target")
elseif(GPU_TARGETS)
  message("-- ${White}${PROJECT_NAME} -- GPU_TARGETS set with -D option${ColourReset}")
else()
  set(GPU_TARGETS "${DEFAULT_GPU_TARGETS}" CACHE STRING "List of specific machine types for library to target")
endif()
message("-- ${White}${PROJECT_NAME} -- AMD GPU_TARGETS: ${GPU_TARGETS}${ColourReset}")

set(HIP_PLATFORM amd CACHE STRING "HIP platform")
find_package(HIP QUIET)
find_package(rocdecode QUIET)
find_package(rocprofiler-register QUIET)
find_package(FFmpeg QUIET)

if(HIP_FOUND AND FFMPEG_FOUND AND rocdecode_FOUND AND rocprofiler-register_FOUND)
    # HIP
    set(LINK_LIBRARY_LIST ${LINK_LIBRARY_LIST} hip::device)
    # FFMPEG
    include_directories(${AVUTIL_INCLUDE_DIR} ${AVCODEC_INCLUDE_DIR})
    set(LINK_LIBRARY_LIST ${LINK_LIBRARY_LIST} ${FFMPEG_LIBRARIES})
    # rocdecode and utils
    include_directories (${CMAKE_CURRENT_SOURCE_DIR}/../../utils ${rocdecode_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/../../utils/rocvideodecode)
    set(LINK_LIBRARY_LIST ${LINK_LIBRARY_LIST} rocdecode::rocdecode)
    # threads
    set(THREADS_PREFER_PTHREAD_FLAG ON)
    find_package(Threads REQUIRED)
    set(LINK_LIBRARY_LIST ${LINK_LIBRARY_LIST} Threads::Threads)
    # rocprofiler-register
    set(LINK_LIBRARY_LIST ${LINK_LIBRARY_LIST} rocprofiler-register::rocprofiler-register)

    # sample app exe
    list(APPEND SOURCES ${PROJECT_SOURCE_DIR} 
                        videodecrgb.cpp 
                        ${CMAKE_CURRENT_SOURCE_DIR}/../../utils/rocvideodecode/roc_video_dec.cpp 
                        ${CMAKE_CURRENT_SOURCE_DIR}/../../utils/colorspace_kernels.cpp
                        ${CMAKE_CURRENT_SOURCE_DIR}/../../utils/resize_kernels.cpp)

    add_executable(${PROJECT_NAME} ${SOURCES})
    target_link_libraries(${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()
    if (NOT rocprofiler-register_FOUND)
        message(FATAL_ERROR "-- ERROR!: rocprofiler-register Not Found! - please install rocprofiler-register!")
    endif()
endif()