# Copyright     2020 Fangjun Kuang (csukuangfj@gmail.com)
# See ../LICENSE for clarification regarding multiple authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

function(download_portaudio)
  if(CMAKE_VERSION VERSION_LESS 3.11)
    # FetchContent is available since 3.11,
    # we've copied it to ${CMAKE_SOURCE_DIR}/cmake/Modules
    # so that it can be used in lower CMake versions.
    message(STATUS "Use FetchContent provided by sherpa-ncnn")
    list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
  endif()

  include(FetchContent)

  set(portaudio_URL  "http://files.portaudio.com/archives/pa_stable_v190700_20210406.tgz")
  set(portaudio_HASH "SHA256=47efbf42c77c19a05d22e627d42873e991ec0c1357219c0d74ce6a2948cb2def")
  if(BUILD_SHARED_LIBS)
    set(PA_BUILD_SHARED ON CACHE BOOL "" FORCE)
    set(PA_BUILD_STATIC OFF CACHE BOOL "" FORCE)
  else()
    set(PA_BUILD_SHARED OFF CACHE BOOL "" FORCE)
    set(PA_BUILD_STATIC ON CACHE BOOL "" FORCE)
  endif()

  FetchContent_Declare(portaudio
    URL               ${portaudio_URL}
    URL_HASH          ${portaudio_HASH}
  )

  FetchContent_GetProperties(portaudio)
  if(NOT portaudio_POPULATED)
    message(STATUS "Downloading portaudio")
    FetchContent_Populate(portaudio)
  endif()
  message(STATUS "portaudio is downloaded to ${portaudio_SOURCE_DIR}")
  message(STATUS "portaudio's binary dir is ${portaudio_BINARY_DIR}")

  if(APPLE)
    set(CMAKE_MACOSX_RPATH ON) # to solve the following warning on macOS
  endif()

  add_subdirectory(${portaudio_SOURCE_DIR} ${portaudio_BINARY_DIR} EXCLUDE_FROM_ALL)
endfunction()

download_portaudio()

# Note
# See http://portaudio.com/docs/v19-doxydocs/tutorial_start.html
# for how to use portaudio