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/*
* 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 std::optional<webrtc::H264ProfileLevelId> profileLevelId =
[UIDevice maxSupportedH264Profile];
if (profileLevelId && profileLevelId->profile >= profile) {
const std::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 {
self = [super init];
if (self) {
self.hexString = hexString;
std::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 {
self = [super init];
if (self) {
self.profile = profile;
self.level = level;
std::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