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- # 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/chrome_build.gni")
- import("//build/config/chromecast_build.gni")
- import("//build/config/chromeos/args.gni")
- import("//build/config/chromeos/ui_mode.gni")
- import("//build/config/features.gni")
- import("//build/config/ui.gni")
- import("//media/gpu/args.gni")
- import("//testing/libfuzzer/fuzzer_test.gni")
- import("//third_party/libaom/options.gni")
- import("//third_party/libgav1/options.gni")
- # This flag sets defaults for the current generation of cast devices.
- is_cast_media_device = is_castos || is_cast_android
- declare_args() {
- # Allows distributions to link pulseaudio directly (DT_NEEDED) instead of
- # using dlopen. This helps with automated detection of ABI mismatches and
- # prevents silent errors.
- link_pulseaudio = false
- # Enable usage of FFmpeg within the media library. Used for most software
- # based decoding, demuxing, and sometimes optimized FFTs. If disabled,
- # implementors must provide their own demuxers and decoders.
- media_use_ffmpeg = true
- # Enable usage of libvpx within the media library. Used for software based
- # decoding of VP9 and VP8A type content.
- media_use_libvpx = true
- # iOS doesn't use ffmpeg, libvpx.
- if (is_ios) {
- media_use_ffmpeg = false
- media_use_libvpx = false
- }
- # Enable usage of OpenH264 within the media library. Used for software based
- # encoding of H264 content.
- media_use_openh264 = true
- if (is_ios || is_android || !proprietary_codecs) {
- media_use_openh264 = false
- }
- # Override to dynamically link the cras (ChromeOS audio) library.
- use_cras = is_chromeos_device
- # Enables AC3/EAC3 audio demuxing. This is enabled only on Chromecast, since
- # it only provides demuxing, and is only useful for AC3/EAC3 audio
- # pass-through to HDMI sink on Chromecast.
- enable_platform_ac3_eac3_audio = proprietary_codecs && is_cast_media_device
- enable_platform_mpeg_h_audio = proprietary_codecs && is_cast_media_device
- # Enables DTS/DTSX audio handling in chromium. This includes demuxing,
- # on-device decoding and bitstream passthrough as supported by device.
- enable_platform_dts_audio = false
- # TODO(crbug.com/1329657): Remove the `is_fuchsia` condition once fuchsia
- # builds set enable_cast_receiver.
- enable_mse_mpeg2ts_stream_parser =
- proprietary_codecs &&
- (enable_cast_receiver || is_fuchsia || use_fuzzing_engine)
- # Enable Dolby Vision demuxing. Enable by default for Chromecast. Actual
- # decoding must be provided by the platform. Note some Dolby Vision profiles
- # which are encoded using HEVC require `enable_platform_hevc` to be enabled.
- #
- # TODO(crbug.com/1336055): Revisit the default value for this setting as it
- # applies to video-capable devices.
- enable_platform_dolby_vision = proprietary_codecs && is_cast_media_device
- # Enable platform support of encrypted Dolby Vision. Clear Dolby Vision is
- # still not supported. The actual support depends on platform capability.
- enable_platform_encrypted_dolby_vision = false
- # Enable HLS with SAMPLE-AES decryption.
- #
- # TODO(crbug.com/1329657): Remove the `is_fuchsia` condition once fuchsia
- # builds set enable_cast_receiver.
- enable_hls_sample_aes =
- proprietary_codecs && (enable_cast_receiver || is_fuchsia)
- # Enable logging override, e.g. enable DVLOGs through level 2 at build time.
- # On Chromecast, these are logged as INFO.
- # On Fuchsia, these are logged as VLOGs.
- enable_logging_override = is_cast_media_device || is_fuchsia
- enable_dav1d_decoder = !is_ios
- # Enable browser managed persistent metadata storage for EME persistent
- # session and persistent usage record session.
- enable_media_drm_storage = is_android || is_castos
- # Enable HLS manifest parser and demuxer.
- enable_hls_demuxer = false
- # Enable inclusion of the HEVC/H265 parser and also enable HEVC/H265 decoding
- # with hardware acceleration assist. Enabled by default for fuzzer builds,
- # ChromeOS builds with protected content support, Windows, Mac, and Android.
- enable_hevc_parser_and_hw_decoder =
- proprietary_codecs &&
- (use_fuzzing_engine || use_chromeos_protected_media || is_win || is_mac ||
- is_android)
- }
- # Use another declare_args() to allow dependence on
- # |enable_hevc_parser_and_hw_decoder|.
- declare_args() {
- enable_av1_decoder = enable_dav1d_decoder || enable_libgav1_decoder
- # Enable HEVC/H265 demuxing. Actual decoding must be provided by the
- # platform.
- # TODO(b/194429120): Enable this for Lacros builds.
- # TODO(crbug.com/1336055): Revisit the default value for this setting as it
- # applies to video-capable devices.
- enable_platform_hevc =
- proprietary_codecs &&
- (enable_hevc_parser_and_hw_decoder || is_cast_media_device)
- }
- assert(
- !enable_platform_ac3_eac3_audio || proprietary_codecs,
- "proprietary_codecs=true is required for enable_platform_ac3_eac3_audio=true.")
- assert(
- !enable_platform_mpeg_h_audio || proprietary_codecs,
- "proprietary_codecs=true is required for enable_platform_mpeg_h_audio=true.")
- assert(
- !enable_mse_mpeg2ts_stream_parser || proprietary_codecs,
- "proprietary_codecs=true is required for enable_mse_mpeg2ts_stream_parser=true.")
- assert(
- !enable_platform_dolby_vision || proprietary_codecs,
- "proprietary_codecs=true is required for enable_platform_dolby_vision=true.")
- assert(
- !enable_platform_encrypted_dolby_vision || enable_platform_dolby_vision,
- "enable_platform_dolby_vision=true is required for enable_platform_encrypted_dolby_vision=true.")
- assert(!enable_hls_sample_aes || proprietary_codecs,
- "proprietary_codecs=true is required for enable_hls_sample_aes=true.")
- assert(
- !enable_platform_dts_audio || proprietary_codecs,
- "proprietary_codecs=true is required for enable_platform_dts_audio=true.")
- assert(
- !enable_hls_sample_aes || enable_mse_mpeg2ts_stream_parser,
- "enable_mse_mpeg2ts_stream_parser=true is required for enable_hls_sample_aes=true.")
- assert(
- !enable_hls_demuxer || enable_mse_mpeg2ts_stream_parser,
- "enable_mse_mpeg2ts_stream_parser=true is required for enable_hls_demuxer=true.")
- assert(!enable_platform_hevc || proprietary_codecs,
- "proprietary_codecs=true is required for enable_platform_hevc=true.")
- assert(
- !enable_hevc_parser_and_hw_decoder || enable_platform_hevc,
- "enable_platform_hevc=true is required for enable_hevc_parser_and_hw_decoder=true.")
- # Use another declare_args() to pick up possible overrides of |use_cras|.
- declare_args() {
- # Enables runtime selection of PulseAudio library.
- use_pulseaudio = false
- # Enables runtime selection of ALSA library for audio.
- use_alsa = false
- # Alsa should be used on all non-Android, non-Mac POSIX systems - with the
- # exception of CastOS desktop builds.
- #
- # TODO(crbug.com/1336055): Remove legacy target_cpu hack used for targeting
- # desktop Chromecast builds.
- if (is_posix && !is_android && !is_mac &&
- (!is_castos || (target_cpu == "x86" || target_cpu == "x64") ||
- is_cast_audio_only)) {
- use_alsa = true
- # Pulse is not supported on Chromecast platforms.
- #
- # ASAN and TSAN will occasionally hang during pa_context_connect(), so we
- # disable PulseAudio when these configurations are enabled.
- #
- # TODO(crbug.com/986021): We shouldn't have to do this, but it's unclear why
- # our test bots are hanging and all of the ones that don't hang just fall
- # back to ALSA after a connection error anyways.
- if (!use_cras && !is_castos && !is_asan && !is_tsan) {
- use_pulseaudio = true
- }
- }
- }
- # Use another declare_args() to include possible overrides of media_use_ffmpeg
- # from --args command line flags in the evaluation. See "gn help declare_args".
- declare_args() {
- # On Android, FFMpeg is built without video decoders by default.
- # This flag gives the option to override that decision in case there are no
- # hardware decoders. To do so, you will also need to update ffmpeg build files
- # in order to define which decoders to build in.
- enable_ffmpeg_video_decoders = media_use_ffmpeg && !is_android
- }
- declare_args() {
- # Enables the use of library CDMs that implements the interface defined at
- # media/cdm/api/content_decryption_module.h. If true, the actually library CDM
- # will be hosted in the mojo CDM service running in the CDM (utility) process.
- # Used for all desktop platforms except Fuchsia (crbug.com/1265618).
- enable_library_cdms = toolkit_views && !is_fuchsia && !is_castos
- }
- declare_args() {
- # Enables host verification for CDMs.
- # Windows and Mac.
- enable_cdm_host_verification =
- enable_library_cdms && (is_mac || is_win) && is_chrome_branded
- # Enable Storage ID which is used by CDMs. This is only available with chrome
- # branding, but may be overridden by other embedders.
- enable_cdm_storage_id = enable_library_cdms && is_chrome_branded &&
- (is_win || is_mac || is_chromeos)
- # If |enable_cdm_storage_id| is set, then an implementation specific key
- # must also be provided. It can be provided by defining CDM_STORAGE_ID_KEY
- # (which takes precedence), or by setting |alternate_cdm_storage_id_key|.
- # The key must be a string of at least 32 characters.
- alternate_cdm_storage_id_key = ""
- }
- assert(!enable_cdm_host_verification || is_mac || is_win,
- "CDM host verification is only supported on Mac and Windows.")
- # Default |mojo_media_services| and |mojo_media_host| on various platforms. See
- # comments below for valid values. Can be overridden by gn build arguments from
- # the --args command line flag.
- _default_mojo_media_services = []
- _default_mojo_media_host = ""
- if (is_cast_media_device) {
- _default_mojo_media_services = cast_mojo_media_services
- _default_mojo_media_host = cast_mojo_media_host
- } else if (is_android) {
- _default_mojo_media_services = [
- "cdm",
- "audio_decoder",
- "video_decoder",
- ]
- _default_mojo_media_host = "gpu"
- } else if (is_mac || (is_win && enable_platform_dts_audio)) {
- _default_mojo_media_services = [
- "audio_decoder",
- "audio_encoder",
- "video_decoder",
- ]
- _default_mojo_media_host = "gpu"
- } else if (is_win) {
- _default_mojo_media_services = [
- "audio_encoder",
- "video_decoder",
- ]
- _default_mojo_media_host = "gpu"
- } else if (is_chromeos_ash || ((is_linux || is_chromeos_lacros) &&
- (use_vaapi || use_v4l2_codec))) {
- _default_mojo_media_services = [ "video_decoder" ]
- _default_mojo_media_host = "gpu"
- }
- # When |enable_library_cdms| is true, the "cdm" service will run in a separate
- # CdmService in the CDM (utility) process. Therefore there's no need to specify
- # |_default_mojo_media_host| which controls where the MediaService runs in.
- if (enable_library_cdms) {
- _default_mojo_media_services += [ "cdm" ]
- }
- declare_args() {
- # A list of mojo media services that should be used in the media pipeline.
- # Valid entries in the list are:
- # - "renderer": Use mojo-based media Renderer service.
- # - "cdm": Use mojo-based Content Decryption Module.
- # - "audio_decoder": Use mojo-based audio decoder in the default media
- # Renderer. Cannot be used with the mojo Renderer above.
- # - "video_decoder": Use mojo-based video decoder in the default media
- # Renderer. Cannot be used with the mojo Renderer above.
- mojo_media_services = _default_mojo_media_services
- # The process that the mojo MediaService runs in. By default, all services
- # registered in |mojo_media_services| are hosted in the MediaService, with the
- # exception that when |enable_library_cdms| is true, the "cdm" service will
- # run in a separate CdmService in the CDM (utility) process, while other
- # |mojo_media_services| still run in the MediaService in the process specified
- # by "mojo_media_host".
- # Valid options are:
- # - "browser": Use mojo media service hosted in the browser process.
- # - "gpu": Use mojo media service hosted in the gpu process.
- # - "": Do not use mojo media service.
- mojo_media_host = _default_mojo_media_host
- }
- declare_args() {
- # This switch defines whether the Media Remoting implementation will be built.
- # When enabled, media is allowed to be renderer and played back on remote
- # devices when the tab is being casted and other conditions are met.
- enable_media_remoting = !is_cast_media_device && !is_ios
- }
- declare_args() {
- # Media Remoting RPC is disabled on Android since it's unused but increases
- # the native binary size by ~70Kb.
- enable_media_remoting_rpc = enable_media_remoting && !is_android
- }
- declare_args() {
- # Currently it is available on Win, Mac and Linux, since it requires the audio
- # service to run in a separate process.
- chrome_wide_echo_cancellation_supported = is_win || is_mac || is_linux
- }
- # Do not expand this list without double-checking with OWNERS, this is a list of
- # all targets which roll up into the //media component. It controls visibility
- # of subcomponent targets and public_deps for //media.
- media_subcomponent_deps = [
- "//media/audio",
- "//media/base",
- # TODO(crbug.com/583067): These files should not be in //media/base.
- "//media/base/android",
- "//media/capabilities",
- "//media/cdm",
- "//media/device_monitors",
- "//media/filters",
- "//media/formats",
- "//media/muxers",
- "//media/renderers",
- "//media/video",
- ]
- if (is_fuchsia) {
- media_subcomponent_deps += [
- "//media/fuchsia/cdm",
- "//media/fuchsia/common",
- ]
- }
- if (media_use_ffmpeg) {
- media_subcomponent_deps += [ "//media/ffmpeg" ]
- }
- if (enable_library_cdms || is_win) {
- media_subcomponent_deps += [ "//media/cdm:cdm_type_conversion" ]
- }
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