Add H265 codec name and profile/tier/level utils.

This adds H265 codec name and profile/tier/level handling needed for
H265 SDP negotiation.

Bug: webrtc:13485
Change-Id: I838b910042ce36f8ae3979c41a73ee46935c57d8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/315900
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Commit-Queue: Jianlin Qiu <jianlin.qiu@intel.com>
Cr-Commit-Position: refs/heads/main@{#40661}
This commit is contained in:
Qiu Jianlin 2023-08-30 12:26:24 +08:00 committed by WebRTC LUCI CQ
parent 83a95f748f
commit 44943c8064
7 changed files with 641 additions and 0 deletions

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@ -68,6 +68,13 @@ rtc_library("video_codecs_api") {
"vp9_profile.h",
]
if (rtc_use_h265) {
sources += [
"h265_profile_tier_level.cc",
"h265_profile_tier_level.h",
]
}
deps = [
":scalability_mode",
"..:fec_controller_api",

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@ -0,0 +1,248 @@
/*
* Copyright (c) 2023 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/video_codecs/h265_profile_tier_level.h"
#include <string>
#include "rtc_base/string_to_number.h"
namespace webrtc {
namespace {
const char kH265FmtpProfile[] = "profile-id";
const char kH265FmtpTier[] = "tier-flag";
const char kH265FmtpLevel[] = "level-id";
} // anonymous namespace
// Annex A of https://www.itu.int/rec/T-REC-H.265 (08/21), section A.3.
absl::optional<H265Profile> StringToH265Profile(const std::string& profile) {
absl::optional<int> i = rtc::StringToNumber<int>(profile);
if (!i.has_value()) {
return absl::nullopt;
}
switch (i.value()) {
case 1:
return H265Profile::kProfileMain;
case 2:
return H265Profile::kProfileMain10;
case 3:
return H265Profile::kProfileMainStill;
case 4:
return H265Profile::kProfileRangeExtensions;
case 5:
return H265Profile::kProfileHighThroughput;
case 6:
return H265Profile::kProfileMultiviewMain;
case 7:
return H265Profile::kProfileScalableMain;
case 8:
return H265Profile::kProfile3dMain;
case 9:
return H265Profile::kProfileScreenContentCoding;
case 10:
return H265Profile::kProfileScalableRangeExtensions;
case 11:
return H265Profile::kProfileHighThroughputScreenContentCoding;
default:
return absl::nullopt;
}
}
// Annex A of https://www.itu.int/rec/T-REC-H.265 (08/21), section A.4,
// tiers and levels.
absl::optional<H265Tier> StringToH265Tier(const std::string& tier) {
absl::optional<int> i = rtc::StringToNumber<int>(tier);
if (!i.has_value()) {
return absl::nullopt;
}
switch (i.value()) {
case 0:
return H265Tier::kTier0;
case 1:
return H265Tier::kTier1;
default:
return absl::nullopt;
}
}
absl::optional<H265Level> StringToH265Level(const std::string& level) {
const absl::optional<int> i = rtc::StringToNumber<int>(level);
if (!i.has_value())
return absl::nullopt;
switch (i.value()) {
case 30:
return H265Level::kLevel1;
case 60:
return H265Level::kLevel2;
case 63:
return H265Level::kLevel2_1;
case 90:
return H265Level::kLevel3;
case 93:
return H265Level::kLevel3_1;
case 120:
return H265Level::kLevel4;
case 123:
return H265Level::kLevel4_1;
case 150:
return H265Level::kLevel5;
case 153:
return H265Level::kLevel5_1;
case 156:
return H265Level::kLevel5_2;
case 180:
return H265Level::kLevel6;
case 183:
return H265Level::kLevel6_1;
case 186:
return H265Level::kLevel6_2;
default:
return absl::nullopt;
}
}
std::string H265ProfileToString(H265Profile profile) {
switch (profile) {
case H265Profile::kProfileMain:
return "1";
case H265Profile::kProfileMain10:
return "2";
case H265Profile::kProfileMainStill:
return "3";
case H265Profile::kProfileRangeExtensions:
return "4";
case H265Profile::kProfileHighThroughput:
return "5";
case H265Profile::kProfileMultiviewMain:
return "6";
case H265Profile::kProfileScalableMain:
return "7";
case H265Profile::kProfile3dMain:
return "8";
case H265Profile::kProfileScreenContentCoding:
return "9";
case H265Profile::kProfileScalableRangeExtensions:
return "10";
case H265Profile::kProfileHighThroughputScreenContentCoding:
return "11";
}
}
std::string H265TierToString(H265Tier tier) {
switch (tier) {
case H265Tier::kTier0:
return "0";
case H265Tier::kTier1:
return "1";
}
}
std::string H265LevelToString(H265Level level) {
switch (level) {
case H265Level::kLevel1:
return "30";
case H265Level::kLevel2:
return "60";
case H265Level::kLevel2_1:
return "63";
case H265Level::kLevel3:
return "90";
case H265Level::kLevel3_1:
return "93";
case H265Level::kLevel4:
return "120";
case H265Level::kLevel4_1:
return "123";
case H265Level::kLevel5:
return "150";
case H265Level::kLevel5_1:
return "153";
case H265Level::kLevel5_2:
return "156";
case H265Level::kLevel6:
return "180";
case H265Level::kLevel6_1:
return "183";
case H265Level::kLevel6_2:
return "186";
}
}
absl::optional<H265ProfileTierLevel> ParseSdpForH265ProfileTierLevel(
const SdpVideoFormat::Parameters& params) {
static const H265ProfileTierLevel kDefaultProfileTierLevel(
H265Profile::kProfileMain, H265Tier::kTier0, H265Level::kLevel3_1);
bool profile_tier_level_specified = false;
absl::optional<H265Profile> profile;
const auto profile_it = params.find(kH265FmtpProfile);
if (profile_it != params.end()) {
profile_tier_level_specified = true;
const std::string& profile_str = profile_it->second;
profile = StringToH265Profile(profile_str);
if (!profile) {
return absl::nullopt;
}
} else {
profile = H265Profile::kProfileMain;
}
absl::optional<H265Tier> tier;
const auto tier_it = params.find(kH265FmtpTier);
if (tier_it != params.end()) {
profile_tier_level_specified = true;
const std::string& tier_str = tier_it->second;
tier = StringToH265Tier(tier_str);
if (!tier) {
return absl::nullopt;
}
} else {
tier = H265Tier::kTier0;
}
absl::optional<H265Level> level;
const auto level_it = params.find(kH265FmtpLevel);
if (level_it != params.end()) {
profile_tier_level_specified = true;
const std::string& level_str = level_it->second;
level = StringToH265Level(level_str);
if (!level) {
return absl::nullopt;
}
} else {
level = H265Level::kLevel3_1;
}
// Spec Table A.9, level 1 to level 3.1 does not allow high tiers.
if (level <= H265Level::kLevel3_1 && tier == H265Tier::kTier1) {
return absl::nullopt;
}
return !profile_tier_level_specified
? kDefaultProfileTierLevel
: H265ProfileTierLevel(profile.value(), tier.value(),
level.value());
}
bool H265IsSameProfileTierLevel(const SdpVideoFormat::Parameters& params1,
const SdpVideoFormat::Parameters& params2) {
const absl::optional<H265ProfileTierLevel> ptl1 =
ParseSdpForH265ProfileTierLevel(params1);
const absl::optional<H265ProfileTierLevel> ptl2 =
ParseSdpForH265ProfileTierLevel(params2);
return ptl1 && ptl2 && ptl1->profile == ptl2->profile &&
ptl1->tier == ptl2->tier && ptl1->level == ptl2->level;
}
} // namespace webrtc

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@ -0,0 +1,109 @@
/*
* Copyright (c) 2023 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.
*/
#ifndef API_VIDEO_CODECS_H265_PROFILE_TIER_LEVEL_H_
#define API_VIDEO_CODECS_H265_PROFILE_TIER_LEVEL_H_
#include <string>
#include "absl/types/optional.h"
#include "api/video_codecs/sdp_video_format.h"
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
// Profiles can be found at:
// https://www.itu.int/rec/T-REC-H.265
// The enum values match the number specified in the SDP.
enum class H265Profile {
kProfileMain = 1,
kProfileMain10 = 2,
kProfileMainStill = 3,
kProfileRangeExtensions = 4,
kProfileHighThroughput = 5,
kProfileMultiviewMain = 6,
kProfileScalableMain = 7,
kProfile3dMain = 8,
kProfileScreenContentCoding = 9,
kProfileScalableRangeExtensions = 10,
kProfileHighThroughputScreenContentCoding = 11,
};
// Tiers can be found at https://www.itu.int/rec/T-REC-H.265
enum class H265Tier {
kTier0,
kTier1,
};
// All values are equal to 30 times the level number.
enum class H265Level {
kLevel1 = 30,
kLevel2 = 60,
kLevel2_1 = 63,
kLevel3 = 90,
kLevel3_1 = 93,
kLevel4 = 120,
kLevel4_1 = 123,
kLevel5 = 150,
kLevel5_1 = 153,
kLevel5_2 = 156,
kLevel6 = 180,
kLevel6_1 = 183,
kLevel6_2 = 186,
};
struct H265ProfileTierLevel {
constexpr H265ProfileTierLevel(H265Profile profile,
H265Tier tier,
H265Level level)
: profile(profile), tier(tier), level(level) {}
H265Profile profile;
H265Tier tier;
H265Level level;
};
// Helper function to convert H265Profile to std::string.
RTC_EXPORT std::string H265ProfileToString(H265Profile profile);
// Helper function to convert H265Tier to std::string.
RTC_EXPORT std::string H265TierToString(H265Tier tier);
// Helper function to convert H265Level to std::string.
RTC_EXPORT std::string H265LevelToString(H265Level level);
// Helper function to get H265Profile from profile string.
RTC_EXPORT absl::optional<H265Profile> StringToH265Profile(
const std::string& profile);
// Helper function to get H265Tier from tier string.
RTC_EXPORT absl::optional<H265Tier> StringToH265Tier(const std::string& tier);
// Helper function to get H265Level from level string.
RTC_EXPORT absl::optional<H265Level> StringToH265Level(
const std::string& level);
// Parses an SDP key-value map of format parameters to retrive an H265
// profile/tier/level. Returns an H265ProfileTierlevel by setting its
// members. profile defaults to `kProfileMain` if no profile-id is specified.
// tier defaults to "kTier0" if no tier-flag is specified.
// level defaults to "kLevel3_1" if no level-id is specified.
// Returns empty value if any of the profile/tier/level key is present but
// contains an invalid value.
RTC_EXPORT absl::optional<H265ProfileTierLevel> ParseSdpForH265ProfileTierLevel(
const SdpVideoFormat::Parameters& params);
// Returns true if the parameters have the same H265 profile or neither contains
// an H265 profile, otherwise false.
bool H265IsSameProfileTierLevel(const SdpVideoFormat::Parameters& params1,
const SdpVideoFormat::Parameters& params2);
} // namespace webrtc
#endif // API_VIDEO_CODECS_H265_PROFILE_TIER_LEVEL_H_

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@ -19,6 +19,10 @@ if (rtc_include_tests) {
"video_encoder_software_fallback_wrapper_unittest.cc",
]
if (rtc_use_h265) {
sources += [ "h265_profile_tier_level_unittest.cc" ]
}
deps = [
":video_decoder_factory_template_tests",
":video_encoder_factory_template_tests",

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@ -0,0 +1,248 @@
/*
* Copyright (c) 2023 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/video_codecs/h265_profile_tier_level.h"
#include <string>
#include "absl/types/optional.h"
#include "test/gtest.h"
namespace webrtc {
TEST(H265ProfileTierLevel, TestLevelToString) {
EXPECT_EQ(H265LevelToString(H265Level::kLevel1), "30");
EXPECT_EQ(H265LevelToString(H265Level::kLevel2), "60");
EXPECT_EQ(H265LevelToString(H265Level::kLevel2_1), "63");
EXPECT_EQ(H265LevelToString(H265Level::kLevel3), "90");
EXPECT_EQ(H265LevelToString(H265Level::kLevel3_1), "93");
EXPECT_EQ(H265LevelToString(H265Level::kLevel4), "120");
EXPECT_EQ(H265LevelToString(H265Level::kLevel4_1), "123");
EXPECT_EQ(H265LevelToString(H265Level::kLevel5), "150");
EXPECT_EQ(H265LevelToString(H265Level::kLevel5_1), "153");
EXPECT_EQ(H265LevelToString(H265Level::kLevel5_2), "156");
EXPECT_EQ(H265LevelToString(H265Level::kLevel6), "180");
EXPECT_EQ(H265LevelToString(H265Level::kLevel6_1), "183");
EXPECT_EQ(H265LevelToString(H265Level::kLevel6_2), "186");
}
TEST(H265ProfileTierLevel, TestProfileToString) {
EXPECT_EQ(H265ProfileToString(H265Profile::kProfileMain), "1");
EXPECT_EQ(H265ProfileToString(H265Profile::kProfileMain10), "2");
EXPECT_EQ(H265ProfileToString(H265Profile::kProfileMainStill), "3");
EXPECT_EQ(H265ProfileToString(H265Profile::kProfileRangeExtensions), "4");
EXPECT_EQ(H265ProfileToString(H265Profile::kProfileHighThroughput), "5");
EXPECT_EQ(H265ProfileToString(H265Profile::kProfileMultiviewMain), "6");
EXPECT_EQ(H265ProfileToString(H265Profile::kProfileScalableMain), "7");
EXPECT_EQ(H265ProfileToString(H265Profile::kProfile3dMain), "8");
EXPECT_EQ(H265ProfileToString(H265Profile::kProfileScreenContentCoding), "9");
EXPECT_EQ(H265ProfileToString(H265Profile::kProfileScalableRangeExtensions),
"10");
EXPECT_EQ(H265ProfileToString(
H265Profile::kProfileHighThroughputScreenContentCoding),
"11");
}
TEST(H265ProfileTierLevel, TestTierToString) {
EXPECT_EQ(H265TierToString(H265Tier::kTier0), "0");
EXPECT_EQ(H265TierToString(H265Tier::kTier1), "1");
}
TEST(H265ProfileTierLevel, TestStringToProfile) {
// Invalid profiles.
EXPECT_FALSE(StringToH265Profile("0"));
EXPECT_FALSE(StringToH265Profile("12"));
// Malformed profiles
EXPECT_FALSE(StringToH265Profile(""));
EXPECT_FALSE(StringToH265Profile(" 1"));
EXPECT_FALSE(StringToH265Profile("12x"));
EXPECT_FALSE(StringToH265Profile("x12"));
EXPECT_FALSE(StringToH265Profile("gggg"));
// Valid profiles.
EXPECT_EQ(StringToH265Profile("1"), H265Profile::kProfileMain);
EXPECT_EQ(StringToH265Profile("2"), H265Profile::kProfileMain10);
EXPECT_EQ(StringToH265Profile("4"), H265Profile::kProfileRangeExtensions);
}
TEST(H265ProfileTierLevel, TestStringToLevel) {
// Invalid levels.
EXPECT_FALSE(StringToH265Level("0"));
EXPECT_FALSE(StringToH265Level("200"));
// Malformed levels.
EXPECT_FALSE(StringToH265Level(""));
EXPECT_FALSE(StringToH265Level(" 30"));
EXPECT_FALSE(StringToH265Level("30x"));
EXPECT_FALSE(StringToH265Level("x30"));
EXPECT_FALSE(StringToH265Level("ggggg"));
// Valid levels.
EXPECT_EQ(StringToH265Level("30"), H265Level::kLevel1);
EXPECT_EQ(StringToH265Level("93"), H265Level::kLevel3_1);
EXPECT_EQ(StringToH265Level("183"), H265Level::kLevel6_1);
}
TEST(H265ProfileTierLevel, TestStringToTier) {
// Invalid tiers.
EXPECT_FALSE(StringToH265Tier("4"));
EXPECT_FALSE(StringToH265Tier("-1"));
// Malformed tiers.
EXPECT_FALSE(StringToH265Tier(""));
EXPECT_FALSE(StringToH265Tier(" 1"));
EXPECT_FALSE(StringToH265Tier("t1"));
// Valid tiers.
EXPECT_EQ(StringToH265Tier("0"), H265Tier::kTier0);
EXPECT_EQ(StringToH265Tier("1"), H265Tier::kTier1);
}
TEST(H265ProfileTierLevel, TestParseSdpProfileTierLevelAllEmpty) {
const absl::optional<H265ProfileTierLevel> profile_tier_level =
ParseSdpForH265ProfileTierLevel(SdpVideoFormat::Parameters());
EXPECT_TRUE(profile_tier_level);
EXPECT_EQ(H265Profile::kProfileMain, profile_tier_level->profile);
EXPECT_EQ(H265Level::kLevel3_1, profile_tier_level->level);
EXPECT_EQ(H265Tier::kTier0, profile_tier_level->tier);
}
TEST(H265ProfileTierLevel, TestParseSdpProfileTierLevelPartialEmpty) {
SdpVideoFormat::Parameters params;
params["profile-id"] = "1";
params["tier-flag"] = "0";
absl::optional<H265ProfileTierLevel> profile_tier_level =
ParseSdpForH265ProfileTierLevel(params);
EXPECT_TRUE(profile_tier_level);
EXPECT_EQ(H265Profile::kProfileMain, profile_tier_level->profile);
EXPECT_EQ(H265Level::kLevel3_1, profile_tier_level->level);
EXPECT_EQ(H265Tier::kTier0, profile_tier_level->tier);
params.clear();
params["profile-id"] = "2";
profile_tier_level = ParseSdpForH265ProfileTierLevel(params);
EXPECT_TRUE(profile_tier_level);
EXPECT_EQ(H265Profile::kProfileMain10, profile_tier_level->profile);
EXPECT_EQ(H265Level::kLevel3_1, profile_tier_level->level);
EXPECT_EQ(H265Tier::kTier0, profile_tier_level->tier);
params.clear();
params["level-id"] = "180";
profile_tier_level = ParseSdpForH265ProfileTierLevel(params);
EXPECT_TRUE(profile_tier_level);
EXPECT_EQ(H265Profile::kProfileMain, profile_tier_level->profile);
EXPECT_EQ(H265Level::kLevel6, profile_tier_level->level);
EXPECT_EQ(H265Tier::kTier0, profile_tier_level->tier);
}
TEST(H265ProfileTierLevel, TestParseSdpProfileTierLevelInvalid) {
SdpVideoFormat::Parameters params;
// Invalid profile-tier-level combination.
params["profile-id"] = "1";
params["tier-flag"] = "1";
params["level-id"] = "93";
absl::optional<H265ProfileTierLevel> profile_tier_level =
ParseSdpForH265ProfileTierLevel(params);
EXPECT_FALSE(profile_tier_level);
params.clear();
params["profile-id"] = "1";
params["tier-flag"] = "4";
params["level-id"] = "180";
profile_tier_level = ParseSdpForH265ProfileTierLevel(params);
EXPECT_FALSE(profile_tier_level);
// Valid profile-tier-level combination.
params.clear();
params["profile-id"] = "1";
params["tier-flag"] = "0";
params["level-id"] = "153";
profile_tier_level = ParseSdpForH265ProfileTierLevel(params);
EXPECT_TRUE(profile_tier_level);
}
TEST(H265ProfileTierLevel, TestToStringRoundTrip) {
SdpVideoFormat::Parameters params;
params["profile-id"] = "1";
params["tier-flag"] = "0";
params["level-id"] = "93";
absl::optional<H265ProfileTierLevel> profile_tier_level =
ParseSdpForH265ProfileTierLevel(params);
EXPECT_TRUE(profile_tier_level);
EXPECT_EQ("1", H265ProfileToString(profile_tier_level->profile));
EXPECT_EQ("0", H265TierToString(profile_tier_level->tier));
EXPECT_EQ("93", H265LevelToString(profile_tier_level->level));
params.clear();
params["profile-id"] = "2";
params["tier-flag"] = "1";
params["level-id"] = "180";
profile_tier_level = ParseSdpForH265ProfileTierLevel(params);
EXPECT_TRUE(profile_tier_level);
EXPECT_EQ("2", H265ProfileToString(profile_tier_level->profile));
EXPECT_EQ("1", H265TierToString(profile_tier_level->tier));
EXPECT_EQ("180", H265LevelToString(profile_tier_level->level));
}
TEST(H265ProfileTierLevel, TestProfileTierLevelCompare) {
SdpVideoFormat::Parameters params1;
SdpVideoFormat::Parameters params2;
// None of profile-id/tier-flag/level-id is specified,
EXPECT_TRUE(H265IsSameProfileTierLevel(params1, params2));
// Same non-empty PTL
params1["profile-id"] = "1";
params1["tier-flag"] = "0";
params1["level-id"] = "120";
params2["profile-id"] = "1";
params2["tier-flag"] = "0";
params2["level-id"] = "120";
EXPECT_TRUE(H265IsSameProfileTierLevel(params1, params2));
// Different profiles.
params1.clear();
params2.clear();
params1["profile-id"] = "1";
params2["profile-id"] = "2";
EXPECT_FALSE(H265IsSameProfileTierLevel(params1, params2));
// Different levels.
params1.clear();
params2.clear();
params1["profile-id"] = "1";
params2["profile-id"] = "1";
params1["level-id"] = "93";
params2["level-id"] = "183";
EXPECT_FALSE(H265IsSameProfileTierLevel(params1, params2));
// Different tiers.
params1.clear();
params2.clear();
params1["profile-id"] = "1";
params2["profile-id"] = "1";
params1["level-id"] = "93";
params2["level-id"] = "93";
params1["tier-flag"] = "0";
params2["tier-flag"] = "1";
EXPECT_FALSE(H265IsSameProfileTierLevel(params1, params2));
// One of the SdpVideoFormat::Parameters is invalid.
params1.clear();
params2.clear();
params1["profile-id"] = "1";
params2["profile-id"] = "1";
params1["tier-flag"] = "0";
params2["tier-flag"] = "4";
EXPECT_FALSE(H265IsSameProfileTierLevel(params1, params2));
}
} // namespace webrtc

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@ -103,6 +103,7 @@ const char kVp8CodecName[] = "VP8";
const char kVp9CodecName[] = "VP9";
const char kAv1CodecName[] = "AV1";
const char kH264CodecName[] = "H264";
const char kH265CodecName[] = "H265";
// RFC 6184 RTP Payload Format for H.264 video
const char kH264FmtpProfileLevelId[] = "profile-level-id";
@ -113,6 +114,16 @@ const char kH264FmtpSpsPpsIdrInKeyframe[] = "sps-pps-idr-in-keyframe";
const char kH264ProfileLevelConstrainedBaseline[] = "42e01f";
const char kH264ProfileLevelConstrainedHigh[] = "640c1f";
// RFC 7798 RTP Payload Format for H.265 video
const char kH265FmtpProfileSpace[] = "profile-space";
const char kH265FmtpTierFlag[] = "tier-flag";
const char kH265FmtpProfileId[] = "profile-id";
const char kH265FmtpLevelId[] = "level-id";
const char kH265FmtpProfileCompatibilityIndicator[] =
"profile-compatibility-indicator";
const char kH265FmtpInteropConstraints[] = "interop-constraints";
const char kH265FmtpTxMode[] = "tx-mode";
const char kVP9ProfileId[] = "profile-id";
const int kDefaultVideoMaxFramerate = 60;

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@ -123,6 +123,7 @@ RTC_EXPORT extern const char kVp8CodecName[];
RTC_EXPORT extern const char kVp9CodecName[];
RTC_EXPORT extern const char kAv1CodecName[];
RTC_EXPORT extern const char kH264CodecName[];
RTC_EXPORT extern const char kH265CodecName[];
// RFC 6184 RTP Payload Format for H.264 video
RTC_EXPORT extern const char kH264FmtpProfileLevelId[];
@ -133,6 +134,19 @@ extern const char kH264FmtpSpsPpsIdrInKeyframe[];
extern const char kH264ProfileLevelConstrainedBaseline[];
extern const char kH264ProfileLevelConstrainedHigh[];
// RFC 7798 RTP Payload Format for H.265 video.
// According to RFC 7742, the sprop parameters MUST NOT be included
// in SDP generated by WebRTC, so for H.265 we don't handle them, though
// current H.264 implementation honors them when receiving
// sprop-parameter-sets in SDP.
RTC_EXPORT extern const char kH265FmtpProfileSpace[];
RTC_EXPORT extern const char kH265FmtpTierFlag[];
RTC_EXPORT extern const char kH265FmtpProfileId[];
RTC_EXPORT extern const char kH265FmtpLevelId[];
RTC_EXPORT extern const char kH265FmtpProfileCompatibilityIndicator[];
RTC_EXPORT extern const char kH265FmtpInteropConstraints[];
RTC_EXPORT extern const char kH265FmtpTxMode[];
extern const char kVP9ProfileId[];
extern const int kDefaultVideoMaxFramerate;