Add AV1 encoder&decoder wrappers for iOS SDK.

It is now possible to use AV1 encoder and decoder on iOS and test
them in apps like AppRTCMobile.

Bug: None
Change-Id: Ifae221020e5abf3809010676862eecd9ffeec5e3
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/208400
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33378}

sdk/objc/api/video_codec/RTCVideoCodecConstants.h

@@ -12,5 +12,6 @@
 
 #import "RTCMacros.h"
 
-RTC_OBJC_EXPORT extern NSString* const kRTCVideoCodecVp8Name;
-RTC_OBJC_EXPORT extern NSString* const kRTCVideoCodecVp9Name;
+RTC_EXTERN NSString* const kRTCVideoCodecVp8Name;
+RTC_EXTERN NSString* const kRTCVideoCodecVp9Name;
+RTC_EXTERN NSString* const kRTCVideoCodecAv1Name;

sdk/objc/api/video_codec/RTCVideoCodecConstants.mm

@@ -15,3 +15,4 @@
 
 NSString *const kRTCVideoCodecVp8Name = @(cricket::kVp8CodecName);
 NSString *const kRTCVideoCodecVp9Name = @(cricket::kVp9CodecName);
+NSString *const kRTCVideoCodecAv1Name = @(cricket::kAv1CodecName);

sdk/objc/api/video_codec/RTCVideoDecoderAV1.h

@@ -0,0 +1,27 @@
+/*
+ *  Copyright 2021 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 <Foundation/Foundation.h>
+
+#import "RTCMacros.h"
+#import "RTCVideoDecoder.h"
+
+RTC_OBJC_EXPORT
+@interface RTC_OBJC_TYPE (RTCVideoDecoderAV1) : NSObject
+
+/* This returns a AV1 decoder that can be returned from a RTCVideoDecoderFactory injected into
+ * RTCPeerConnectionFactory. Even though it implements the RTCVideoDecoder protocol, it can not be
+ * used independently from the RTCPeerConnectionFactory.
+ */
++ (id<RTC_OBJC_TYPE(RTCVideoDecoder)>)av1Decoder;
+
++ (bool)isSupported;
+
+@end

sdk/objc/api/video_codec/RTCVideoDecoderAV1.mm

@@ -0,0 +1,35 @@
+/*
+ *  Copyright (c) 2021 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 <Foundation/Foundation.h>
+
+#import "RTCMacros.h"
+#import "RTCVideoDecoderAV1.h"
+#import "RTCWrappedNativeVideoDecoder.h"
+
+#include "modules/video_coding/codecs/av1/libaom_av1_decoder.h"
+
+@implementation RTC_OBJC_TYPE (RTCVideoDecoderAV1)
+
++ (id<RTC_OBJC_TYPE(RTCVideoDecoder)>)av1Decoder {
+  std::unique_ptr<webrtc::VideoDecoder> nativeDecoder(webrtc::CreateLibaomAv1Decoder());
+  if (nativeDecoder == nullptr) {
+    return nil;
+  }
+  return [[RTC_OBJC_TYPE(RTCWrappedNativeVideoDecoder) alloc]
+      initWithNativeDecoder:std::move(nativeDecoder)];
+}
+
++ (bool)isSupported {
+  return webrtc::kIsLibaomAv1DecoderSupported;
+}
+
+@end

sdk/objc/api/video_codec/RTCVideoDecoderVP9.h

@@ -22,4 +22,6 @@ RTC_OBJC_EXPORT
  */
 + (id<RTC_OBJC_TYPE(RTCVideoDecoder)>)vp9Decoder;
 
++ (bool)isSupported;
+
 @end

sdk/objc/api/video_codec/RTCVideoDecoderVP9.mm

@@ -20,8 +20,20 @@
 @implementation RTC_OBJC_TYPE (RTCVideoDecoderVP9)
 
 + (id<RTC_OBJC_TYPE(RTCVideoDecoder)>)vp9Decoder {
+  std::unique_ptr<webrtc::VideoDecoder> nativeDecoder(webrtc::VP9Decoder::Create());
+  if (nativeDecoder == nullptr) {
+    return nil;
+  }
   return [[RTC_OBJC_TYPE(RTCWrappedNativeVideoDecoder) alloc]
-      initWithNativeDecoder:std::unique_ptr<webrtc::VideoDecoder>(webrtc::VP9Decoder::Create())];
+      initWithNativeDecoder:std::move(nativeDecoder)];
+}
+
++ (bool)isSupported {
+#if defined(RTC_ENABLE_VP9)
+  return true;
+#else
+  return false;
+#endif
 }
 
 @end

sdk/objc/api/video_codec/RTCVideoEncoderAV1.h

@@ -0,0 +1,27 @@
+/*
+ *  Copyright 2021 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 <Foundation/Foundation.h>
+
+#import "RTCMacros.h"
+#import "RTCVideoEncoder.h"
+
+RTC_OBJC_EXPORT
+@interface RTC_OBJC_TYPE (RTCVideoEncoderAV1) : NSObject
+
+/* This returns a AV1 encoder that can be returned from a RTCVideoEncoderFactory injected into
+ * RTCPeerConnectionFactory. Even though it implements the RTCVideoEncoder protocol, it can not be
+ * used independently from the RTCPeerConnectionFactory.
+ */
++ (id<RTC_OBJC_TYPE(RTCVideoEncoder)>)av1Encoder;
+
++ (bool)isSupported;
+
+@end

sdk/objc/api/video_codec/RTCVideoEncoderAV1.mm

@@ -0,0 +1,35 @@
+/*
+ *  Copyright (c) 2021 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 <Foundation/Foundation.h>
+
+#import "RTCMacros.h"
+#import "RTCVideoEncoderAV1.h"
+#import "RTCWrappedNativeVideoEncoder.h"
+
+#include "modules/video_coding/codecs/av1/libaom_av1_encoder.h"
+
+@implementation RTC_OBJC_TYPE (RTCVideoEncoderAV1)
+
++ (id<RTC_OBJC_TYPE(RTCVideoEncoder)>)av1Encoder {
+  std::unique_ptr<webrtc::VideoEncoder> nativeEncoder(webrtc::CreateLibaomAv1Encoder());
+  if (nativeEncoder == nullptr) {
+    return nil;
+  }
+  return [[RTC_OBJC_TYPE(RTCWrappedNativeVideoEncoder) alloc]
+      initWithNativeEncoder:std::move(nativeEncoder)];
+}
+
++ (bool)isSupported {
+  return webrtc::kIsLibaomAv1EncoderSupported;
+}
+
+@end

sdk/objc/api/video_codec/RTCVideoEncoderVP9.h

@@ -22,4 +22,6 @@ RTC_OBJC_EXPORT
  */
 + (id<RTC_OBJC_TYPE(RTCVideoEncoder)>)vp9Encoder;
 
++ (bool)isSupported;
+
 @end

sdk/objc/api/video_codec/RTCVideoEncoderVP9.mm

@@ -20,8 +20,20 @@
 @implementation RTC_OBJC_TYPE (RTCVideoEncoderVP9)
 
 + (id<RTC_OBJC_TYPE(RTCVideoEncoder)>)vp9Encoder {
+  std::unique_ptr<webrtc::VideoEncoder> nativeEncoder(webrtc::VP9Encoder::Create());
+  if (nativeEncoder == nullptr) {
+    return nil;
+  }
   return [[RTC_OBJC_TYPE(RTCWrappedNativeVideoEncoder) alloc]
-      initWithNativeEncoder:std::unique_ptr<webrtc::VideoEncoder>(webrtc::VP9Encoder::Create())];
+      initWithNativeEncoder:std::move(nativeEncoder)];
+}
+
++ (bool)isSupported {
+#if defined(RTC_ENABLE_VP9)
+  return true;
+#else
+  return false;
+#endif
 }
 
 @end