# 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/linux/pkg_config.gni")
import("//build/shim_headers.gni")

declare_args() {
  use_system_flac = false
}

config("flac_config") {
  defines = [
    "FLAC__NO_DLL",
  ]
}

# Need a separate config to ensure the warnings are added to the end.
config("flac_private_config") {
  if (is_clang) {
    cflags = [
      # libflac converts between FLAC__StreamDecoderState and
      # FLAC__StreamDecoderInitStatus a lot in stream_decoder.c.
      "-Wno-conversion",
      # libflac contains constants that are only used in certain compile-time
      # cases, which triggers unused-const-variable warnings in other cases.
      "-Wno-unused-const-variable",
    ]
  }
}

source_set("bundled_flac") {
  sources = [
    "include/FLAC/all.h",
    "include/FLAC/assert.h",
    "include/FLAC/callback.h",
    "include/FLAC/export.h",
    "include/FLAC/format.h",
    "include/FLAC/metadata.h",
    "include/FLAC/ordinals.h",
    "include/FLAC/stream_decoder.h",
    "include/FLAC/stream_encoder.h",
    "include/share/alloc.h",
    "include/share/compat.h",
    "include/share/endswap.h",
    "include/share/private.h",
    "src/libFLAC/alloc.c",
    "src/libFLAC/bitmath.c",
    "src/libFLAC/bitreader.c",
    "src/libFLAC/bitwriter.c",
    "src/libFLAC/cpu.c",
    "src/libFLAC/crc.c",
    "src/libFLAC/fixed.c",
    "src/libFLAC/float.c",
    "src/libFLAC/format.c",
    "src/libFLAC/lpc.c",
    "src/libFLAC/md5.c",
    "src/libFLAC/memory.c",
    "src/libFLAC/stream_decoder.c",
    "src/libFLAC/stream_encoder.c",
    "src/libFLAC/stream_encoder_framing.c",
    "src/libFLAC/window.c",
    "src/libFLAC/include/private/all.h",
    "src/libFLAC/include/private/bitmath.h",
    "src/libFLAC/include/private/bitreader.h",
    "src/libFLAC/include/private/bitwriter.h",
    "src/libFLAC/include/private/cpu.h",
    "src/libFLAC/include/private/crc.h",
    "src/libFLAC/include/private/fixed.h",
    "src/libFLAC/include/private/float.h",
    "src/libFLAC/include/private/format.h",
    "src/libFLAC/include/private/lpc.h",
    "src/libFLAC/include/private/macros.h",
    "src/libFLAC/include/private/md5.h",
    "src/libFLAC/include/private/memory.h",
    "src/libFLAC/include/private/metadata.h",
    "src/libFLAC/include/private/stream_encoder.h",
    "src/libFLAC/include/private/stream_encoder_framing.h",
    "src/libFLAC/include/private/window.h",
    "src/libFLAC/include/protected/all.h",
    "src/libFLAC/include/protected/stream_decoder.h",
    "src/libFLAC/include/protected/stream_encoder.h",
  ]

  configs -= [ "//build/config/compiler:chromium_code" ]
  configs += [
    ":flac_config",
    ":flac_private_config",
    "//build/config/compiler:no_chromium_code",
  ]
  public_configs = [ ":flac_config" ]

  include_dirs = [
    "include",
    "src/libFLAC/include",
  ]

  defines = [
    "FLAC__OVERFLOW_DETECT",
    "VERSION=\"1.3.1\"",
    "HAVE_LROUND",
  ]

  if (is_win) {
    sources += [
      "include/share/win_utf8_io.h",
      "src/share/win_utf8_io/win_utf8_io.c",
    ]
    # win_utf8_io.c defines this itself.
    configs -= [ "//build/config/win:lean_and_mean" ]
    cflags = [
      "/wd4334",  # 32-bit shift converted to 64 bits.
      "/wd4267"   # Converting from size_t to unsigned on 64-bit.
    ]
  } else {
    defines += [
      "HAVE_INTTYPES_H",
    ]
  }
}

if (use_system_flac) {
  pkg_config("system_flac") {
    packages = [ "flac" ]
  }
}

shim_headers("flac_shim") {
  root_path = "include"
  headers = [
    "FLAC/all.h",
    "FLAC/assert.h",
    "FLAC/callback.h",
    "FLAC/export.h",
    "FLAC/format.h",
    "FLAC/metadata.h",
    "FLAC/ordinals.h",
    "FLAC/stream_decoder.h",
    "FLAC/stream_encoder.h",
  ]
}

group("flac") {
  if (use_system_flac) {
    deps = [ ":flac_shim" ]
    public_configs = [ ":system_flac" ]
  } else {
    public_deps = [ ":bundled_flac" ]
  }
}