| // 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/media_buildflags.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. |
| // The only exception is VP9 where 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 = 1 << 7, |
| EME_CODEC_DOLBY_VISION_AVC = 1 << 8, |
| EME_CODEC_DOLBY_VISION_HEVC = 1 << 9, |
| EME_CODEC_AC3 = 1 << 10, |
| EME_CODEC_EAC3 = 1 << 11, |
| EME_CODEC_MPEG_H_AUDIO = 1 << 12, |
| EME_CODEC_FLAC = 1 << 13, |
| EME_CODEC_AV1 = 1 << 14, |
| }; |
| |
| // *_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; |
| |
| namespace { |
| |
| constexpr SupportedCodecs GetMp4AudioCodecs() { |
| SupportedCodecs codecs = EME_CODEC_FLAC; |
| #if BUILDFLAG(USE_PROPRIETARY_CODECS) |
| codecs |= EME_CODEC_AAC; |
| #if BUILDFLAG(ENABLE_AC3_EAC3_AUDIO_DEMUXING) |
| codecs |= EME_CODEC_AC3 | EME_CODEC_EAC3; |
| #endif // BUILDFLAG(ENABLE_AC3_EAC3_AUDIO_DEMUXING) |
| #if BUILDFLAG(ENABLE_MPEG_H_AUDIO_DEMUXING) |
| codecs |= EME_CODEC_MPEG_H_AUDIO; |
| #endif // BUILDFLAG(ENABLE_MPEG_H_AUDIO_DEMUXING) |
| #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_HEVC_DEMUXING) |
| codecs |= EME_CODEC_HEVC; |
| #endif // BUILDFLAG(ENABLE_HEVC_DEMUXING) |
| #if BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING) |
| codecs |= EME_CODEC_DOLBY_VISION_AVC; |
| #if BUILDFLAG(ENABLE_HEVC_DEMUXING) |
| codecs |= EME_CODEC_DOLBY_VISION_HEVC; |
| #endif // BUILDFLAG(ENABLE_HEVC_DEMUXING) |
| #endif // BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING) |
| #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) |
| |
| enum class EmeSessionTypeSupport { |
| // Invalid default value. |
| INVALID, |
| // The session type is not supported. |
| NOT_SUPPORTED, |
| // The session type is supported if a distinctive identifier is available. |
| SUPPORTED_WITH_IDENTIFIER, |
| // The session type is always supported. |
| SUPPORTED, |
| }; |
| |
| // 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, |
| }; |
| |
| // Configuration rules indicate the configuration state required to support a |
| // configuration option (note: a configuration option may be disallowing a |
| // feature). Configuration rules are used to answer queries about distinctive |
| // identifier, persistent state, and robustness requirements, as well as to |
| // describe support for different session types. |
| // |
| // If in the future there are reasons to request user permission other than |
| // access to a distinctive identifier, then additional rules should be added. |
| // Rules are implemented in ConfigState and are otherwise opaque. |
| enum class EmeConfigRule { |
| // The configuration option is not supported. |
| NOT_SUPPORTED, |
| |
| // The configuration option prevents use of a distinctive identifier. |
| IDENTIFIER_NOT_ALLOWED, |
| |
| // The configuration option is supported if a distinctive identifier is |
| // available. |
| IDENTIFIER_REQUIRED, |
| |
| // The configuration option is supported, but the user experience may be |
| // improved if a distinctive identifier is available. |
| IDENTIFIER_RECOMMENDED, |
| |
| // The configuration option prevents use of persistent state. |
| PERSISTENCE_NOT_ALLOWED, |
| |
| // The configuration option is supported if persistent state is available. |
| PERSISTENCE_REQUIRED, |
| |
| // The configuration option is supported if both a distinctive identifier and |
| // persistent state are available. |
| IDENTIFIER_AND_PERSISTENCE_REQUIRED, |
| |
| // The configuration option prevents use of hardware-secure codecs. |
| // This rule only has meaning on platforms that distinguish hardware-secure |
| // codecs (i.e. Android and Windows). |
| HW_SECURE_CODECS_NOT_ALLOWED, |
| |
| // The configuration option is supported if hardware-secure codecs are used. |
| // This rule only has meaning on platforms that distinguish hardware-secure |
| // codecs (i.e. Android and Windows). |
| HW_SECURE_CODECS_REQUIRED, |
| |
| // The configuration option is supported without conditions. |
| SUPPORTED, |
| }; |
| |
| } // namespace media |
| |
| #endif // MEDIA_BASE_EME_CONSTANTS_H_ |