| # 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/features.gni") |
| import("//media/gpu/args.gni") |
| import("//testing/libfuzzer/fuzzer_test.gni") |
| |
| # 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", |
| ] |
| |
| 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 |
| } |
| |
| # Override to dynamically link the cras (ChromeOS audio) library. |
| use_cras = false |
| |
| # 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_ac3_eac3_audio_demuxing = proprietary_codecs && is_chromecast |
| |
| enable_mpeg_h_audio_demuxing = proprietary_codecs && is_chromecast |
| |
| enable_mse_mpeg2ts_stream_parser = |
| proprietary_codecs && (is_chromecast || use_fuzzing_engine) |
| |
| # Enable parsing for the 'cbcs' encryption scheme added by MPEG Common |
| # Encryption 3rd Edition (ISO/IEC 23001-7), published 02/15/2016. |
| enable_cbcs_encryption_scheme = is_chromecast || is_mac || is_win || is_linux |
| |
| # Enable HEVC/H265 demuxing. Actual decoding must be provided by the |
| # platform. Enable by default for Chromecast. |
| enable_hevc_demuxing = proprietary_codecs && is_chromecast |
| |
| # 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_hevc_demuxing| to be enabled. |
| enable_dolby_vision_demuxing = proprietary_codecs && is_chromecast |
| |
| # Enable HLS with SAMPLE-AES decryption. |
| enable_hls_sample_aes = proprietary_codecs && is_chromecast |
| |
| # If true, use cast CMA backend instead of default chromium media pipeline. |
| # TODO(sanfin): Remove this flag when all builds enable CMA. |
| is_cast_using_cma_backend = true |
| } |
| |
| # enable_hls_sample_aes can only be true if enable_mse_mpeg2ts_stream_parser is. |
| assert(enable_mse_mpeg2ts_stream_parser || !enable_hls_sample_aes) |
| |
| if (media_use_ffmpeg) { |
| media_subcomponent_deps += [ "//media/ffmpeg" ] |
| } |
| |
| # Use a second 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 non-Android, non-Mac POSIX systems. |
| # Alsa should be used on desktop Chromecast and audio-only Chromecast builds. |
| if (is_posix && !is_android && !is_mac && |
| (!is_chromecast || is_cast_desktop_build || is_cast_audio_only)) { |
| use_alsa = true |
| |
| # Pulse is not supported on Chromecast platforms. |
| if (!use_cras && !is_chromecast) { |
| use_pulseaudio = true |
| } |
| } |
| } |
| |
| # Use another declare_args() to pick up possible overrides of media_use_ffmpeg |
| # from --args command line flags. 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 |
| } |
| |
| # 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. |
| enable_library_cdms = (is_linux && !is_chromecast) || is_mac || is_win |
| |
| declare_args() { |
| # Experiment to enable mojo media services (e.g. "renderer", "cdm", see |
| # |mojo_media_services|). When enabled, selected mojo paths will be enabled in |
| # the media pipeline and corresponding services will hosted in the selected |
| # remote process (e.g. "utility" process, see |mojo_media_host|). |
| enable_mojo_media = |
| is_android || is_chromecast || is_chromeos || is_mac || is_win || |
| enable_library_cdms || (is_desktop_linux && use_vaapi) |
| |
| # Enable the TestMojoMediaClient to be used in mojo MediaService. This is for |
| # testing only and will override the default platform MojoMediaClient, if any. |
| enable_test_mojo_media_client = false |
| |
| # When enabled, this feature allows developers to use a runtime flag to |
| # choose the implementation of the renderer that is used. On a build which |
| # enables the mojo renderer, if --disable-mojo-renderer is passed at start-up, |
| # the "default" renderer will be used instead. Both renderer implementations |
| # will be linked if this feature is enabled, increasing the binary size. This |
| # feature does not make sense if the mojo renderer is not enabled. |
| enable_runtime_media_renderer_selection = is_cast_desktop_build |
| |
| # 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 = "" |
| } |
| |
| # This feature can only be enabled when using Mojo media. Furthermore, the |
| # "renderer" service must be enabled, which is asserted in |
| # //media/mojo/services/BUILD.gn |
| assert( |
| !enable_runtime_media_renderer_selection || enable_mojo_media, |
| "Runtime media renderer selection only applies when mojo media is enabled.") |
| |
| assert(!enable_cdm_host_verification || is_mac || is_win, |
| "CDM host verification is only supported on Mac and Windows.") |
| |
| _default_mojo_media_services = [] |
| _default_mojo_media_host = "none" |
| |
| # Default mojo_media_services and mojo_media_host on various platforms. |
| # Can be overridden by gn build arguments from the --args command line flag |
| # for local testing. |
| if (enable_mojo_media) { |
| if (is_chromecast && is_cast_using_cma_backend && !is_android) { |
| _default_mojo_media_services = [ |
| "cdm", |
| "renderer", |
| ] |
| _default_mojo_media_host = "browser" |
| } else if (is_android) { |
| # Both chrome for Android and cast for Android belongs to this case |
| if (is_cast_audio_only) { |
| _default_mojo_media_services = [ |
| "cdm", |
| "audio_decoder", |
| ] |
| _default_mojo_media_host = "browser" |
| } else { |
| _default_mojo_media_services = [ |
| "cdm", |
| "audio_decoder", |
| "video_decoder", |
| ] |
| _default_mojo_media_host = "gpu" |
| } |
| } else if (is_chromeos || is_mac || is_win || |
| (is_desktop_linux && use_vaapi)) { |
| _default_mojo_media_services = [ "video_decoder" ] |
| _default_mojo_media_host = "gpu" |
| } |
| |
| if (enable_library_cdms) { |
| _default_mojo_media_services += [ "cdm" ] |
| |
| # Having a CDM running means it could require a CdmProxy running in the GPU |
| # process. |
| assert( |
| _default_mojo_media_host == "none" || _default_mojo_media_host == "gpu", |
| "For now, mojo_media_host should not overwrite it with a different " + |
| "value if it has been set.") |
| _default_mojo_media_host = "gpu" |
| } |
| } |
| |
| # Use another declare_args() to pick up possible overrides of enable_mojo_media |
| # from --args command line flags. See "gn help declare_args". |
| declare_args() { |
| # A list of mojo media services that should be used in the media pipeline. |
| # Must not be empty if |enable_mojo_media| is true. |
| # 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: |
| # - "none": Do not use mojo media service. |
| # - "browser": Use mojo media service hosted in the browser process. |
| # - "gpu": Use mojo media service hosted in the gpu process. |
| # - "utility": Use mojo media service hosted in the utility process. |
| 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_chromecast && !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 |
| } |