# Copyright 2015 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/buildflag_header.gni")
import("//build/config/chromecast_build.gni")
import("//chromecast/chromecast.gni")
import("//media/media_options.gni")

declare_args() {
  system_owns_volume =
      use_alsa && !enable_assistant && chromecast_branding != "google"

  mixer_output = ""
}

cast_source_set("backend") {
  sources = [
    "audio_decoder_software_wrapper.cc",
    "audio_decoder_software_wrapper.h",
    "audio_decoder_wrapper.cc",
    "audio_decoder_wrapper.h",
    "cma_backend.h",
    "cma_backend_factory.h",
    "cma_backend_factory_impl.cc",
    "cma_backend_factory_impl.h",
    "extra_audio_stream.h",
    "media_pipeline_backend_manager.cc",
    "media_pipeline_backend_manager.h",
    "media_pipeline_backend_wrapper.cc",
    "media_pipeline_backend_wrapper.h",
    "video_decoder_wrapper.cc",
    "video_decoder_wrapper.h",
  ]

  public_deps = [
    "//chromecast/public",
    "//chromecast/public/media",
  ]

  deps = [
    "//base",
    "//chromecast:chromecast_buildflags",
    "//chromecast/base/metrics:metrics",
    "//chromecast/media:libcast_media",
    "//chromecast/media/cma/base",
    "//chromecast/media/cma/decoder",
  ]
}

# Target for OEM partners to override media shared library, i.e.
# libcast_media_1.0.so. This target is only used to build executables
# with correct linkage information.
cast_shared_library("libcast_media_1.0") {
  if (is_cast_desktop_build) {
    deps = [
      "//chromecast/media/cma/backend/desktop",
    ]
  } else {
    deps = [
      ":dummy",
    ]
  }
}

# Dummy implementation of media backend used on chromecast devices.
# Must not depend on anything outside //chromecast/public.
cast_source_set("dummy") {
  sources = [
    "cast_media_dummy.cc",
  ]

  deps = [
    ":audio_buildflags",
    "//chromecast/public",
  ]
}

volume_control_in_media_shlib = !cast_volume_control_in_avsettings

buildflag_header("audio_buildflags") {
  header = "audio_buildflags.h"

  flags = [
    "MEDIA_CLOCK_MONOTONIC_RAW=$media_clock_monotonic_raw",
    "SYSTEM_OWNS_VOLUME=$system_owns_volume",
    "VOLUME_CONTROL_IN_MEDIA_SHLIB=$volume_control_in_media_shlib",
  ]
}

# Implementation of video decoder that discards decoder buffers.
# Used on audio platforms for media streams containing video.
cast_source_set("null_video") {
  sources = [
    "video_decoder_null.cc",
    "video_decoder_null.h",
  ]

  deps = [
    "//base",
    "//chromecast/public/media",
  ]
}

cast_source_set("public") {
  sources = [
    "system_volume_control.h",
  ]

  deps = [
    "//base",
    "//chromecast/public/media",
  ]
}

cast_source_set("audio_helpers") {
  sources = [
    "audio_fader.cc",
    "audio_fader.h",
  ]

  deps = [
    "//base",
    "//chromecast/public/media",
    "//media",
  ]
}

cast_source_set("av_sync_dummy") {
  sources = [
    "av_sync_dummy.cc",
  ]

  deps = [
    "//base",
    "//chromecast/public",
  ]
}

cast_source_set("audio_codec_support") {
  sources = [
    "media_codec_support_cast_audio.cc",
  ]
  deps = [
    "//base",
    "//chromecast/public",
    "//chromecast/public/media:media",
  ]
}

cast_source_set("cast_audio_json") {
  sources = [
    "cast_audio_json.cc",
    "cast_audio_json.h",
  ]

  deps = [
    "//base",
  ]
}

cast_source_set("post_processor_factory") {
  sources = [
    "post_processor_factory.cc",
    "post_processor_factory.h",
  ]

  deps = [
    "//base",
    "//chromecast/media/cma/backend/post_processors:post_processor_wrapper",
    "//chromecast/public/media",
  ]
}

cast_source_set("audio_resampler") {
  sources = [
    "audio_resampler.cc",
    "audio_resampler.h",
  ]

  deps = [
    "//base",
    "//chromecast/media/cma/base",
    "//media",
  ]

  # Use fastest possible float math.
  configs -= [ "//build/config/compiler:default_optimization" ]
  configs += [ "//build/config/compiler:optimize_speed" ]
  cflags = [ "-ffast-math" ]
}

cast_source_set("interleaved_channel_mixer") {
  sources = [
    "interleaved_channel_mixer.cc",
    "interleaved_channel_mixer.h",
  ]
  deps = [
    "//base",
    "//media",
  ]

  # Use fastest possible float math.
  configs -= [ "//build/config/compiler:default_optimization" ]
  configs += [ "//build/config/compiler:optimize_speed" ]
  cflags = [ "-ffast-math" ]
}

cast_source_set("mixer_control") {
  sources = [
    "mixer_control.h",
  ]
  deps = [
    "//chromecast/public",
  ]
}

cast_source_set("mixer_pipeline") {
  sources = [
    "audio_output_redirector_input.h",
    "filter_group.cc",
    "filter_group.h",
    "mixer_input.cc",
    "mixer_input.h",
    "mixer_pipeline.cc",
    "mixer_pipeline.h",
    "post_processing_pipeline.h",
    "post_processing_pipeline_impl.cc",
    "post_processing_pipeline_impl.h",
    "post_processing_pipeline_parser.cc",
    "post_processing_pipeline_parser.h",
  ]
  deps = [
    ":audio_buildflags",
    ":audio_helpers",
    ":audio_resampler",
    ":cast_audio_json",
    ":interleaved_channel_mixer",
    ":post_processor_factory",
    ":public",
    "//base",
    "//chromecast/base",
    "//chromecast/media/base",
    "//chromecast/media/cma/base",
    "//chromecast/media/cma/decoder",
    "//chromecast/public",
    "//chromecast/public/media",
    "//media",
    "//media:shared_memory_support",
  ]
}

cast_source_set("volume_map") {
  sources = [
    "volume_map.cc",
    "volume_map.h",
  ]
  deps = [
    ":cast_audio_json",
    "//base",
  ]
}

cast_source_set("for_mixer_audio") {
  sources = [
    "audio_decoder_for_mixer.cc",
    "audio_decoder_for_mixer.h",
    "audio_output_redirector.cc",
    "audio_output_redirector.h",
    "buffering_mixer_source.cc",
    "buffering_mixer_source.h",
    "cast_media_shlib_mixer_audio.cc",
    "direct_mixer_source.cc",
    "direct_mixer_source.h",
    "loopback_handler.cc",
    "loopback_handler.h",
    "media_pipeline_backend_for_mixer.cc",
    "media_pipeline_backend_for_mixer.h",
    "stream_mixer.cc",
    "stream_mixer.h",
    "volume_control.cc",
  ]

  deps = [
    ":audio_buildflags",
    ":audio_helpers",
    ":audio_resampler",
    ":cast_audio_json",
    ":interleaved_channel_mixer",
    ":mixer_control",
    ":mixer_pipeline",
    ":post_processor_factory",
    ":public",
    ":volume_map",
    "//base",
    "//chromecast/base",
    "//chromecast/base:thread_health_checker",
    "//chromecast/media/audio:libcast_external_audio_pipeline_1.0",
    "//chromecast/media/base",
    "//chromecast/media/cma/base",
    "//chromecast/media/cma/decoder",
    "//chromecast/public",
    "//chromecast/public/media",
    "//media",
    "//media:shared_memory_support",
  ]

  if (use_alsa) {
    deps += [ "alsa:cma_backend_support" ]
  } else if (is_fuchsia) {
    deps += [ "fuchsia:cma_backend_support" ]
  } else {
    # If enable_video_with_mixed_audio && !use_alsa, the platform needs to
    # provide its own mixer output.
    if (!enable_video_with_mixed_audio) {
      sources += [ "mixer_output_stream_dummy.cc" ]
    } else {
      assert("$mixer_output" != "")
      deps += [ "$mixer_output" ]
    }
  }
}

test("cast_audio_backend_unittests") {
  testonly = true
  sources = [
    "audio_fader_unittest.cc",
    "filter_group_unittest.cc",
    "interleaved_channel_mixer_unittest.cc",
    "mock_mixer_source.cc",
    "mock_mixer_source.h",
    "mock_post_processor_factory.cc",
    "mock_post_processor_factory.h",
    "mock_redirected_audio_output.cc",
    "mock_redirected_audio_output.h",
    "stream_mixer_external_audio_pipeline_unittest.cc",
    "stream_mixer_unittest.cc",
    "volume_map_unittest.cc",
  ]

  deps = [
    ":audio_helpers",
    ":av_sync_dummy",
    ":cast_audio_json",
    ":for_mixer_audio",
    ":interleaved_channel_mixer",
    ":mixer_pipeline",
    ":null_video",
    ":public",
    ":volume_map",
    "//base",
    "//base/test:run_all_unittests",
    "//chromecast/media/audio:fake_external_audio_pipeline",
    "//chromecast/media/cma/backend/post_processors:unittests",
    "//chromecast/public",
    "//chromecast/public/media",
    "//media",
    "//media:shared_memory_support",
    "//testing/gmock",
    "//testing/gtest",
  ]

  if (is_fuchsia) {
    deps += [ "fuchsia:unit_tests" ]
  }
}