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Diffstat (limited to '')
-rw-r--r-- | third_party/libwebrtc/sdk/objc/components/video_codec/RTCH264ProfileLevelId.mm | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/third_party/libwebrtc/sdk/objc/components/video_codec/RTCH264ProfileLevelId.mm b/third_party/libwebrtc/sdk/objc/components/video_codec/RTCH264ProfileLevelId.mm new file mode 100644 index 0000000000..f0ef3ec232 --- /dev/null +++ b/third_party/libwebrtc/sdk/objc/components/video_codec/RTCH264ProfileLevelId.mm @@ -0,0 +1,120 @@ +/* + * Copyright 2018 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. + * + */ + +#import "RTCH264ProfileLevelId.h" + +#import "helpers/NSString+StdString.h" +#if defined(WEBRTC_IOS) +#import "UIDevice+H264Profile.h" +#endif + +#include "api/video_codecs/h264_profile_level_id.h" +#include "media/base/media_constants.h" + +namespace { + +NSString *MaxSupportedProfileLevelConstrainedHigh(); +NSString *MaxSupportedProfileLevelConstrainedBaseline(); + +} // namespace + +NSString *const kRTCVideoCodecH264Name = @(cricket::kH264CodecName); +NSString *const kRTCLevel31ConstrainedHigh = @"640c1f"; +NSString *const kRTCLevel31ConstrainedBaseline = @"42e01f"; +NSString *const kRTCMaxSupportedH264ProfileLevelConstrainedHigh = + MaxSupportedProfileLevelConstrainedHigh(); +NSString *const kRTCMaxSupportedH264ProfileLevelConstrainedBaseline = + MaxSupportedProfileLevelConstrainedBaseline(); + +namespace { + +#if defined(WEBRTC_IOS) + +NSString *MaxSupportedLevelForProfile(webrtc::H264Profile profile) { + const absl::optional<webrtc::H264ProfileLevelId> profileLevelId = + [UIDevice maxSupportedH264Profile]; + if (profileLevelId && profileLevelId->profile >= profile) { + const absl::optional<std::string> profileString = + H264ProfileLevelIdToString(webrtc::H264ProfileLevelId(profile, profileLevelId->level)); + if (profileString) { + return [NSString stringForStdString:*profileString]; + } + } + return nil; +} +#endif + +NSString *MaxSupportedProfileLevelConstrainedBaseline() { +#if defined(WEBRTC_IOS) + NSString *profile = MaxSupportedLevelForProfile(webrtc::H264Profile::kProfileConstrainedBaseline); + if (profile != nil) { + return profile; + } +#endif + return kRTCLevel31ConstrainedBaseline; +} + +NSString *MaxSupportedProfileLevelConstrainedHigh() { +#if defined(WEBRTC_IOS) + NSString *profile = MaxSupportedLevelForProfile(webrtc::H264Profile::kProfileConstrainedHigh); + if (profile != nil) { + return profile; + } +#endif + return kRTCLevel31ConstrainedHigh; +} + +} // namespace + +@interface RTC_OBJC_TYPE (RTCH264ProfileLevelId) +() + + @property(nonatomic, assign) RTCH264Profile profile; +@property(nonatomic, assign) RTCH264Level level; +@property(nonatomic, strong) NSString *hexString; + +@end + +@implementation RTC_OBJC_TYPE (RTCH264ProfileLevelId) + +@synthesize profile = _profile; +@synthesize level = _level; +@synthesize hexString = _hexString; + +- (instancetype)initWithHexString:(NSString *)hexString { + if (self = [super init]) { + self.hexString = hexString; + + absl::optional<webrtc::H264ProfileLevelId> profile_level_id = + webrtc::ParseH264ProfileLevelId([hexString cStringUsingEncoding:NSUTF8StringEncoding]); + if (profile_level_id.has_value()) { + self.profile = static_cast<RTCH264Profile>(profile_level_id->profile); + self.level = static_cast<RTCH264Level>(profile_level_id->level); + } + } + return self; +} + +- (instancetype)initWithProfile:(RTCH264Profile)profile level:(RTCH264Level)level { + if (self = [super init]) { + self.profile = profile; + self.level = level; + + absl::optional<std::string> hex_string = + webrtc::H264ProfileLevelIdToString(webrtc::H264ProfileLevelId( + static_cast<webrtc::H264Profile>(profile), static_cast<webrtc::H264Level>(level))); + self.hexString = + [NSString stringWithCString:hex_string.value_or("").c_str() encoding:NSUTF8StringEncoding]; + } + return self; +} + +@end |