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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.
- #ifndef MEDIA_BASE_EME_CONSTANTS_H_
- #define MEDIA_BASE_EME_CONSTANTS_H_
- #include <stdint.h>
- #include "media/base/media_export.h"
- #include "media/media_buildflags.h"
- #include "third_party/abseil-cpp/absl/types/optional.h"
- namespace media {
- // Defines values that specify registered Initialization Data Types used
- // in Encrypted Media Extensions (EME).
- // http://w3c.github.io/encrypted-media/initdata-format-registry.html#registry
- enum class EmeInitDataType { UNKNOWN, WEBM, CENC, KEYIDS, MAX = KEYIDS };
- // Defines bitmask values that specify codecs used in Encrypted Media Extensions
- // (EME). Generally codec profiles are not specified and it is assumed that the
- // profile support for encrypted playback is the same as for clear playback.
- // For VP9 we have older CDMs only supporting profile 0, while new CDMs could
- // support profile 2. Profile 1 and 3 are not supported by EME, see
- // https://crbug.com/898298.
- enum EmeCodec : uint32_t {
- EME_CODEC_NONE = 0,
- EME_CODEC_OPUS = 1 << 0,
- EME_CODEC_VORBIS = 1 << 1,
- EME_CODEC_VP8 = 1 << 2,
- EME_CODEC_VP9_PROFILE0 = 1 << 3,
- EME_CODEC_AAC = 1 << 4,
- EME_CODEC_AVC1 = 1 << 5,
- EME_CODEC_VP9_PROFILE2 = 1 << 6, // VP9 profiles 2
- EME_CODEC_HEVC_PROFILE_MAIN = 1 << 7,
- EME_CODEC_DOLBY_VISION_PROFILE0 = 1 << 8,
- EME_CODEC_DOLBY_VISION_PROFILE4 = 1 << 9,
- EME_CODEC_DOLBY_VISION_PROFILE5 = 1 << 10,
- EME_CODEC_DOLBY_VISION_PROFILE7 = 1 << 11,
- EME_CODEC_DOLBY_VISION_PROFILE8 = 1 << 12,
- EME_CODEC_DOLBY_VISION_PROFILE9 = 1 << 13,
- EME_CODEC_AC3 = 1 << 14,
- EME_CODEC_EAC3 = 1 << 15,
- EME_CODEC_MPEG_H_AUDIO = 1 << 16,
- EME_CODEC_FLAC = 1 << 17,
- EME_CODEC_AV1 = 1 << 18,
- EME_CODEC_HEVC_PROFILE_MAIN10 = 1 << 19,
- EME_CODEC_DTS = 1 << 20,
- EME_CODEC_DTSXP2 = 1 << 21,
- };
- // *_ALL values should only be used for masking, do not use them to specify
- // codec support because they may be extended to include more codecs.
- using SupportedCodecs = uint32_t;
- // Dolby Vision profile 0 and 9 are based on AVC while profile 4, 5, 7 and 8 are
- // based on HEVC.
- constexpr SupportedCodecs EME_CODEC_DOLBY_VISION_AVC =
- EME_CODEC_DOLBY_VISION_PROFILE0 | EME_CODEC_DOLBY_VISION_PROFILE9;
- constexpr SupportedCodecs EME_CODEC_DOLBY_VISION_HEVC =
- EME_CODEC_DOLBY_VISION_PROFILE4 | EME_CODEC_DOLBY_VISION_PROFILE5 |
- EME_CODEC_DOLBY_VISION_PROFILE7 | EME_CODEC_DOLBY_VISION_PROFILE8;
- namespace {
- constexpr SupportedCodecs GetMp4AudioCodecs() {
- SupportedCodecs codecs = EME_CODEC_OPUS | EME_CODEC_FLAC;
- #if BUILDFLAG(USE_PROPRIETARY_CODECS)
- codecs |= EME_CODEC_AAC;
- #if BUILDFLAG(ENABLE_PLATFORM_AC3_EAC3_AUDIO)
- codecs |= EME_CODEC_AC3 | EME_CODEC_EAC3;
- #endif // BUILDFLAG(ENABLE_PLATFORM_AC3_EAC3_AUDIO)
- #if BUILDFLAG(ENABLE_PLATFORM_DTS_AUDIO)
- codecs |= EME_CODEC_DTS | EME_CODEC_DTSXP2;
- #endif // BUILDFLAG(ENABLE_PLATFORM_DTS_AUDIO)
- #if BUILDFLAG(ENABLE_PLATFORM_MPEG_H_AUDIO)
- codecs |= EME_CODEC_MPEG_H_AUDIO;
- #endif // BUILDFLAG(ENABLE_PLATFORM_MPEG_H_AUDIO)
- #endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
- return codecs;
- }
- constexpr SupportedCodecs GetMp4VideoCodecs() {
- // VP9 codec can be in MP4. Legacy VP9 codec strings ("vp9" and "vp9.0") can
- // not be in "video/mp4" mime type, but that is enforced by media::MimeUtil.
- SupportedCodecs codecs = EME_CODEC_VP9_PROFILE0 | EME_CODEC_VP9_PROFILE2;
- codecs |= EME_CODEC_AV1;
- #if BUILDFLAG(USE_PROPRIETARY_CODECS)
- codecs |= EME_CODEC_AVC1;
- #if BUILDFLAG(ENABLE_PLATFORM_HEVC)
- codecs |= EME_CODEC_HEVC_PROFILE_MAIN;
- codecs |= EME_CODEC_HEVC_PROFILE_MAIN10;
- #endif // BUILDFLAG(ENABLE_PLATFORM_HEVC)
- #if BUILDFLAG(ENABLE_PLATFORM_DOLBY_VISION)
- codecs |= EME_CODEC_DOLBY_VISION_AVC;
- #if BUILDFLAG(ENABLE_PLATFORM_HEVC)
- codecs |= EME_CODEC_DOLBY_VISION_HEVC;
- #endif // BUILDFLAG(ENABLE_PLATFORM_HEVC)
- #endif // BUILDFLAG(ENABLE_PLATFORM_DOLBY_VISION)
- #endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
- return codecs;
- }
- } // namespace
- constexpr SupportedCodecs EME_CODEC_WEBM_AUDIO_ALL =
- EME_CODEC_OPUS | EME_CODEC_VORBIS;
- constexpr SupportedCodecs EME_CODEC_WEBM_VIDEO_ALL =
- EME_CODEC_VP8 | EME_CODEC_VP9_PROFILE0 | EME_CODEC_VP9_PROFILE2 |
- EME_CODEC_AV1;
- constexpr SupportedCodecs EME_CODEC_WEBM_ALL =
- EME_CODEC_WEBM_AUDIO_ALL | EME_CODEC_WEBM_VIDEO_ALL;
- constexpr SupportedCodecs EME_CODEC_MP4_AUDIO_ALL = GetMp4AudioCodecs();
- constexpr SupportedCodecs EME_CODEC_MP4_VIDEO_ALL = GetMp4VideoCodecs();
- constexpr SupportedCodecs EME_CODEC_MP4_ALL =
- EME_CODEC_MP4_AUDIO_ALL | EME_CODEC_MP4_VIDEO_ALL;
- constexpr SupportedCodecs EME_CODEC_AUDIO_ALL =
- EME_CODEC_WEBM_AUDIO_ALL | EME_CODEC_MP4_AUDIO_ALL;
- constexpr SupportedCodecs EME_CODEC_VIDEO_ALL =
- EME_CODEC_WEBM_VIDEO_ALL | EME_CODEC_MP4_VIDEO_ALL;
- constexpr SupportedCodecs EME_CODEC_ALL =
- EME_CODEC_WEBM_ALL | EME_CODEC_MP4_ALL;
- #if BUILDFLAG(USE_PROPRIETARY_CODECS)
- #if BUILDFLAG(ENABLE_MSE_MPEG2TS_STREAM_PARSER)
- constexpr SupportedCodecs EME_CODEC_MP2T_VIDEO_ALL = EME_CODEC_AVC1;
- static_assert(
- (EME_CODEC_MP2T_VIDEO_ALL & EME_CODEC_VIDEO_ALL) ==
- EME_CODEC_MP2T_VIDEO_ALL,
- "EME_CODEC_MP2T_VIDEO_ALL should be a subset of EME_CODEC_MP4_ALL");
- #endif // BUILDFLAG(ENABLE_MSE_MPEG2TS_STREAM_PARSER)
- #endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
- // Used to declare support for distinctive identifier and persistent state.
- // These are purposefully limited to not allow one to require the other, so that
- // transitive requirements are not possible. Non-trivial refactoring would be
- // required to support transitive requirements.
- enum class EmeFeatureSupport {
- // Invalid default value.
- INVALID,
- // Access to the feature is not supported at all.
- NOT_SUPPORTED,
- // Access to the feature may be requested.
- REQUESTABLE,
- // Access to the feature cannot be blocked.
- ALWAYS_ENABLED,
- };
- enum class EmeMediaType {
- AUDIO,
- VIDEO,
- };
- enum class EmeConfigRuleState {
- // To correctly identify the EmeConfig as Supported, we use the enum value
- // kUnset for each of the rules so that it is easy to check for, and cannot be
- // confused.
- kUnset,
- // Not Allowed represents when the rule in the collection of EmeConfigRules is
- // not allowed by the current system.
- kNotAllowed,
- // Recommended represents when the rule in the collection of EmeConfigRules is
- // recommended by the current system. In our design, the recommended takes a
- // second priority and cannot override the NotAllowed or Required value.
- kRecommended,
- // Required represents when the rule in the collection of EmeConfigRules is
- // required by the current system.
- kRequired,
- };
- struct MEDIA_EXPORT EmeConfig {
- using Rule = absl::optional<EmeConfig>;
- // Refer to the EME spec for definitions on what identifier, persistence, and
- // hw_secure_codecs represent.
- EmeConfigRuleState identifier = EmeConfigRuleState::kUnset;
- EmeConfigRuleState persistence = EmeConfigRuleState::kUnset;
- EmeConfigRuleState hw_secure_codecs = EmeConfigRuleState::kUnset;
- // To represent an EmeConfig::Rule where the feature is supported without any
- // special requirements. This type adds nothing during the AddRule() function.
- // Internally, we represent Supported as all the States set to kUnset.
- static EmeConfig::Rule SupportedRule() { return EmeConfig(); }
- // To represent an EmeConfig::Rule where the feature is not supported.
- // Internally, we represent Unsupported as absl::nullopt.
- static EmeConfig::Rule UnsupportedRule() { return absl::nullopt; }
- };
- inline bool operator==(EmeConfig const& lhs, EmeConfig const& rhs) {
- return lhs.persistence == rhs.persistence &&
- lhs.identifier == rhs.identifier &&
- lhs.hw_secure_codecs == rhs.hw_secure_codecs;
- }
- } // namespace media
- #endif // MEDIA_BASE_EME_CONSTANTS_H_
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