# Copyright 2016 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD - style license that can be
# found in the LICENSE file.

declare_args() {
  # Use a prebuilt ffmpeg binary rather than building it locally.  See
  # //garnet/bin/mediaplayer/ffmpeg/README.md for details.  This is
  # ignored when building media_player in variant builds (e.g. sanitizers);
  # in that case, ffmpeg is always built from source so as to be built with
  # the selected variant's config.  When this is false (either explicitly
  # or because media_player is a variant build) then //third_party/ffmpeg
  # must be in the source tree, which requires:
  # `jiri import -name garnet manifest/ffmpeg https://fuchsia.googlesource.com/garnet`
  use_prebuilt_ffmpeg = true
}

if (toolchain_variant.name != "" && toolchain_variant.name != "debug" &&
    toolchain_variant.name != "release") {
  use_prebuilt_ffmpeg = false
}

source_set("ffmpeg") {
  sources = [
    "av_codec_context.cc",
    "av_codec_context.h",
    "av_format_context.h",
    "av_frame.h",
    "av_io_context.cc",
    "av_io_context.h",
    "av_packet.h",
    "ffmpeg_audio_decoder.cc",
    "ffmpeg_audio_decoder.h",
    "ffmpeg_decoder_base.cc",
    "ffmpeg_decoder_base.h",
    "ffmpeg_decoder_factory.cc",
    "ffmpeg_decoder_factory.h",
    "ffmpeg_demux.cc",
    "ffmpeg_demux.h",
    "ffmpeg_demux_factory.cc",
    "ffmpeg_demux_factory.h",
    "ffmpeg_formatting.cc",
    "ffmpeg_formatting.h",
    "ffmpeg_init.cc",
    "ffmpeg_init.h",
    "ffmpeg_video_decoder.cc",
    "ffmpeg_video_decoder.h",
    "ffmpeg_video_frame_layout.cc",
    "ffmpeg_video_frame_layout.h",
    "lpcm_util.cc",
    "lpcm_util.h",
  ]

  deps = [
    "//garnet/bin/mediaplayer/decode",
    "//garnet/bin/mediaplayer/demux",
    "//garnet/bin/mediaplayer/graph",
    "//garnet/bin/mediaplayer/util",
    "//garnet/public/fidl/fuchsia.media",
    "//garnet/public/fidl/fuchsia.mediaplayer",
    "//garnet/public/lib/fsl",
    "//garnet/public/lib/fxl",
    "//garnet/public/lib/media/timeline",
    "//zircon/public/lib/async-loop-cpp",
    "//zircon/public/lib/trace",
  ]

  defines = [
    "FF_API_PIX_FMT_DESC=0",
    "FF_API_OLD_DECODE_AUDIO=0",
    "FF_API_DESTRUCT_PACKET=0",
    "FF_API_GET_BUFFER=0",
    "FF_API_CONVERGENCE_DURATION=0",
    "__STDC_CONSTANT_MACROS",
  ]

  if (use_prebuilt_ffmpeg) {
    deps += [ ":prebuilt_ffmpeg" ]
  } else {
    deps += [ "//third_party/ffmpeg" ]
  }
}

if (use_prebuilt_ffmpeg) {
  assert(
      toolchain_variant.name == "" || toolchain_variant.name == "debug" ||
          toolchain_variant.name == "release",
      "Set use_prebuilt_ffmpeg=false when selecting variants for media_player.")

  group("prebuilt_ffmpeg") {
    deps = [
      ":prebuilt_ffmpeg_copy",
    ]

    public_configs = [ ":prebuilt_ffmpeg_config" ]
  }

  copy("prebuilt_ffmpeg_copy") {
    visibility = [ ":prebuilt_ffmpeg" ]

    sources = [
      "prebuilt/${current_cpu}/libffmpeg.so",
    ]
    outputs = [
      "$root_out_dir/${current_cpu}-shared/libffmpeg.so",
    ]
  }

  config("prebuilt_ffmpeg_config") {
    visibility = [ ":prebuilt_ffmpeg" ]

    prebuilt_ffmpeg_base = "prebuilt/${current_cpu}/"
    if (current_cpu == "x64") {
      ffmpeg_config = "max"
    } else {
      ffmpeg_config = "default"
    }

    include_dirs = [
      prebuilt_ffmpeg_base,
      prebuilt_ffmpeg_base + "/fuchsia/config/" + ffmpeg_config + "/" +
          current_cpu,
    ]

    libs = get_target_outputs(":prebuilt_ffmpeg_copy")
  }
}