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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /third_party/libwebrtc/api/rtp_parameters.cc | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | third_party/libwebrtc/api/rtp_parameters.cc | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/rtp_parameters.cc b/third_party/libwebrtc/api/rtp_parameters.cc new file mode 100644 index 0000000000..c1d12e5d8d --- /dev/null +++ b/third_party/libwebrtc/api/rtp_parameters.cc @@ -0,0 +1,295 @@ +/* + * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ +#include "api/rtp_parameters.h" + +#include <algorithm> +#include <string> +#include <tuple> +#include <utility> + +#include "api/array_view.h" +#include "rtc_base/strings/string_builder.h" + +namespace webrtc { + +const char* DegradationPreferenceToString( + DegradationPreference degradation_preference) { + switch (degradation_preference) { + case DegradationPreference::DISABLED: + return "disabled"; + case DegradationPreference::MAINTAIN_FRAMERATE: + return "maintain-framerate"; + case DegradationPreference::MAINTAIN_RESOLUTION: + return "maintain-resolution"; + case DegradationPreference::BALANCED: + return "balanced"; + } + RTC_CHECK_NOTREACHED(); +} + +const double kDefaultBitratePriority = 1.0; + +RtcpFeedback::RtcpFeedback() = default; +RtcpFeedback::RtcpFeedback(RtcpFeedbackType type) : type(type) {} +RtcpFeedback::RtcpFeedback(RtcpFeedbackType type, + RtcpFeedbackMessageType message_type) + : type(type), message_type(message_type) {} +RtcpFeedback::RtcpFeedback(const RtcpFeedback& rhs) = default; +RtcpFeedback::~RtcpFeedback() = default; + +RtpCodecCapability::RtpCodecCapability() = default; +RtpCodecCapability::~RtpCodecCapability() = default; + +RtpHeaderExtensionCapability::RtpHeaderExtensionCapability() = default; +RtpHeaderExtensionCapability::RtpHeaderExtensionCapability( + absl::string_view uri) + : uri(uri) {} +RtpHeaderExtensionCapability::RtpHeaderExtensionCapability( + absl::string_view uri, + int preferred_id) + : uri(uri), preferred_id(preferred_id) {} +RtpHeaderExtensionCapability::RtpHeaderExtensionCapability( + absl::string_view uri, + int preferred_id, + RtpTransceiverDirection direction) + : uri(uri), preferred_id(preferred_id), direction(direction) {} +RtpHeaderExtensionCapability::~RtpHeaderExtensionCapability() = default; + +RtpExtension::RtpExtension() = default; +RtpExtension::RtpExtension(absl::string_view uri, int id) : uri(uri), id(id) {} +RtpExtension::RtpExtension(absl::string_view uri, int id, bool encrypt) + : uri(uri), id(id), encrypt(encrypt) {} +RtpExtension::~RtpExtension() = default; + +RtpFecParameters::RtpFecParameters() = default; +RtpFecParameters::RtpFecParameters(FecMechanism mechanism) + : mechanism(mechanism) {} +RtpFecParameters::RtpFecParameters(FecMechanism mechanism, uint32_t ssrc) + : ssrc(ssrc), mechanism(mechanism) {} +RtpFecParameters::RtpFecParameters(const RtpFecParameters& rhs) = default; +RtpFecParameters::~RtpFecParameters() = default; + +RtpRtxParameters::RtpRtxParameters() = default; +RtpRtxParameters::RtpRtxParameters(uint32_t ssrc) : ssrc(ssrc) {} +RtpRtxParameters::RtpRtxParameters(const RtpRtxParameters& rhs) = default; +RtpRtxParameters::~RtpRtxParameters() = default; + +RtpEncodingParameters::RtpEncodingParameters() = default; +RtpEncodingParameters::RtpEncodingParameters(const RtpEncodingParameters& rhs) = + default; +RtpEncodingParameters::~RtpEncodingParameters() = default; + +RtpCodecParameters::RtpCodecParameters() = default; +RtpCodecParameters::RtpCodecParameters(const RtpCodecParameters& rhs) = default; +RtpCodecParameters::~RtpCodecParameters() = default; + +RtpCapabilities::RtpCapabilities() = default; +RtpCapabilities::~RtpCapabilities() = default; + +RtcpParameters::RtcpParameters() = default; +RtcpParameters::RtcpParameters(const RtcpParameters& rhs) = default; +RtcpParameters::~RtcpParameters() = default; + +RtpParameters::RtpParameters() = default; +RtpParameters::RtpParameters(const RtpParameters& rhs) = default; +RtpParameters::~RtpParameters() = default; + +std::string RtpExtension::ToString() const { + char buf[256]; + rtc::SimpleStringBuilder sb(buf); + sb << "{uri: " << uri; + sb << ", id: " << id; + if (encrypt) { + sb << ", encrypt"; + } + sb << '}'; + return sb.str(); +} + +constexpr char RtpExtension::kEncryptHeaderExtensionsUri[]; +constexpr char RtpExtension::kAudioLevelUri[]; +constexpr char RtpExtension::kTimestampOffsetUri[]; +constexpr char RtpExtension::kAbsSendTimeUri[]; +constexpr char RtpExtension::kAbsoluteCaptureTimeUri[]; +constexpr char RtpExtension::kVideoRotationUri[]; +constexpr char RtpExtension::kVideoContentTypeUri[]; +constexpr char RtpExtension::kVideoTimingUri[]; +constexpr char RtpExtension::kGenericFrameDescriptorUri00[]; +constexpr char RtpExtension::kDependencyDescriptorUri[]; +constexpr char RtpExtension::kVideoLayersAllocationUri[]; +constexpr char RtpExtension::kTransportSequenceNumberUri[]; +constexpr char RtpExtension::kTransportSequenceNumberV2Uri[]; +constexpr char RtpExtension::kPlayoutDelayUri[]; +constexpr char RtpExtension::kColorSpaceUri[]; +constexpr char RtpExtension::kMidUri[]; +constexpr char RtpExtension::kRidUri[]; +constexpr char RtpExtension::kRepairedRidUri[]; +constexpr char RtpExtension::kVideoFrameTrackingIdUri[]; +constexpr char RtpExtension::kCsrcAudioLevelsUri[]; + +constexpr int RtpExtension::kMinId; +constexpr int RtpExtension::kMaxId; +constexpr int RtpExtension::kMaxValueSize; +constexpr int RtpExtension::kOneByteHeaderExtensionMaxId; +constexpr int RtpExtension::kOneByteHeaderExtensionMaxValueSize; + +bool RtpExtension::IsSupportedForAudio(absl::string_view uri) { + return uri == webrtc::RtpExtension::kAudioLevelUri || + uri == webrtc::RtpExtension::kAbsSendTimeUri || + uri == webrtc::RtpExtension::kAbsoluteCaptureTimeUri || + uri == webrtc::RtpExtension::kTransportSequenceNumberUri || + uri == webrtc::RtpExtension::kTransportSequenceNumberV2Uri || + uri == webrtc::RtpExtension::kMidUri || + uri == webrtc::RtpExtension::kRidUri || + uri == webrtc::RtpExtension::kRepairedRidUri || + uri == webrtc::RtpExtension::kCsrcAudioLevelsUri; +} + +bool RtpExtension::IsSupportedForVideo(absl::string_view uri) { + return uri == webrtc::RtpExtension::kTimestampOffsetUri || + uri == webrtc::RtpExtension::kAbsSendTimeUri || + uri == webrtc::RtpExtension::kAbsoluteCaptureTimeUri || + uri == webrtc::RtpExtension::kVideoRotationUri || + uri == webrtc::RtpExtension::kTransportSequenceNumberUri || + uri == webrtc::RtpExtension::kTransportSequenceNumberV2Uri || + uri == webrtc::RtpExtension::kPlayoutDelayUri || + uri == webrtc::RtpExtension::kVideoContentTypeUri || + uri == webrtc::RtpExtension::kVideoTimingUri || + uri == webrtc::RtpExtension::kMidUri || + uri == webrtc::RtpExtension::kGenericFrameDescriptorUri00 || + uri == webrtc::RtpExtension::kDependencyDescriptorUri || + uri == webrtc::RtpExtension::kColorSpaceUri || + uri == webrtc::RtpExtension::kRidUri || + uri == webrtc::RtpExtension::kRepairedRidUri || + uri == webrtc::RtpExtension::kVideoLayersAllocationUri || + uri == webrtc::RtpExtension::kVideoFrameTrackingIdUri; +} + +bool RtpExtension::IsEncryptionSupported(absl::string_view uri) { + return +#if defined(ENABLE_EXTERNAL_AUTH) + // TODO(jbauch): Figure out a way to always allow "kAbsSendTimeUri" + // here and filter out later if external auth is really used in + // srtpfilter. External auth is used by Chromium and replaces the + // extension header value of "kAbsSendTimeUri", so it must not be + // encrypted (which can't be done by Chromium). + uri != webrtc::RtpExtension::kAbsSendTimeUri && +#endif + uri != webrtc::RtpExtension::kEncryptHeaderExtensionsUri; +} + +// Returns whether a header extension with the given URI exists. +// Note: This does not differentiate between encrypted and non-encrypted +// extensions, so use with care! +static bool HeaderExtensionWithUriExists( + const std::vector<RtpExtension>& extensions, + absl::string_view uri) { + for (const auto& extension : extensions) { + if (extension.uri == uri) { + return true; + } + } + return false; +} + +const RtpExtension* RtpExtension::FindHeaderExtensionByUri( + const std::vector<RtpExtension>& extensions, + absl::string_view uri, + Filter filter) { + const webrtc::RtpExtension* fallback_extension = nullptr; + for (const auto& extension : extensions) { + if (extension.uri != uri) { + continue; + } + + switch (filter) { + case kDiscardEncryptedExtension: + // We only accept an unencrypted extension. + if (!extension.encrypt) { + return &extension; + } + break; + + case kPreferEncryptedExtension: + // We prefer an encrypted extension but we can fall back to an + // unencrypted extension. + if (extension.encrypt) { + return &extension; + } else { + fallback_extension = &extension; + } + break; + + case kRequireEncryptedExtension: + // We only accept an encrypted extension. + if (extension.encrypt) { + return &extension; + } + break; + } + } + + // Returning fallback extension (if any) + return fallback_extension; +} + +const RtpExtension* RtpExtension::FindHeaderExtensionByUriAndEncryption( + const std::vector<RtpExtension>& extensions, + absl::string_view uri, + bool encrypt) { + for (const auto& extension : extensions) { + if (extension.uri == uri && extension.encrypt == encrypt) { + return &extension; + } + } + return nullptr; +} + +const std::vector<RtpExtension> RtpExtension::DeduplicateHeaderExtensions( + const std::vector<RtpExtension>& extensions, + Filter filter) { + std::vector<RtpExtension> filtered; + + // If we do not discard encrypted extensions, add them first + if (filter != kDiscardEncryptedExtension) { + for (const auto& extension : extensions) { + if (!extension.encrypt) { + continue; + } + if (!HeaderExtensionWithUriExists(filtered, extension.uri)) { + filtered.push_back(extension); + } + } + } + + // If we do not require encrypted extensions, add missing, non-encrypted + // extensions. + if (filter != kRequireEncryptedExtension) { + for (const auto& extension : extensions) { + if (extension.encrypt) { + continue; + } + if (!HeaderExtensionWithUriExists(filtered, extension.uri)) { + filtered.push_back(extension); + } + } + } + + // Sort the returned vector to make comparisons of header extensions reliable. + // In order of priority, we sort by uri first, then encrypt and id last. + std::sort(filtered.begin(), filtered.end(), + [](const RtpExtension& a, const RtpExtension& b) { + return std::tie(a.uri, a.encrypt, a.id) < + std::tie(b.uri, b.encrypt, b.id); + }); + + return filtered; +} +} // namespace webrtc |