# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/config/arm.gni")
import("//build/config/chrome_build.gni")
import("//build/config/chromecast_build.gni")
import("//build/config/sanitizers/sanitizers.gni")

if (is_chrome_branded) {
  _default_ffmpeg_branding = "Chrome"
} else {
  _default_ffmpeg_branding = "Chromium"
}

if (is_chromeos && is_chrome_branded) {
  _default_ffmpeg_branding = "ChromeOS"
}

if (is_chromecast) {
  if (is_android) {
    _default_ffmpeg_branding = "Chrome"
  } else {
    # TODO(alokp): What audio codecs does Chromecast want here?  Sort
    # out and add configs if necessary.  http://crbug.com/570754
    _default_ffmpeg_branding = "ChromeOS"
  }
}

declare_args() {
  # Controls whether we build the Chromium or Google Chrome version of FFmpeg.
  # The Google Chrome version contains additional codecs. Typical values are
  # Chromium, Chrome, and ChromeOS.
  ffmpeg_branding = _default_ffmpeg_branding

  # Set true to build ffmpeg as a shared library. NOTE: this means we should
  # always consult is_component_ffmpeg instead of is_component_build for
  # ffmpeg targets. This helps linux chromium packagers that swap out our
  # ffmpeg.so with their own. See discussion here
  # https://groups.google.com/a/chromium.org/forum/#!msg/chromium-packagers/R5rcZXWxBEQ/B6k0zzmJbvcJ
  is_component_ffmpeg = is_component_build

  # Set to true to force the use of ffmpeg's stdatomic fallback code. This code
  # is unsafe and does not implement atomics properly. https://crbug.com/161723.
  #
  # Windows and GCC prior to 4.9 lack stdatomic.h.
  #
  # This is also useful for developers who use icecc, which relies upon
  # clang's -frewrite-includes flag which is broken with #include_next
  # directives as used in chromium's clang stdatomic.h.
  # Some background: https://bugs.llvm.org/show_bug.cgi?id=26828
  ffmpeg_use_unsafe_atomics = false
}

assert(ffmpeg_branding == "Chromium" ||
       ffmpeg_branding == "Chrome" ||
       ffmpeg_branding == "ChromeOS")

if (current_cpu == "x86") {
  ffmpeg_arch = "ia32"
} else if (current_cpu == "arm" && arm_version >= 7 && arm_use_neon) {
  ffmpeg_arch = "arm-neon"
} else {
  ffmpeg_arch = current_cpu
}

os_config = current_os
if ((is_linux || is_chromeos) && is_msan) {
  os_config = "linux-noasm"
} else if (is_chromeos || is_fuchsia) {
  os_config = "linux"
} else if (is_win && !is_clang) {
  os_config = "win-msvc"
}