From 61a01af454181a88aaf75ef68a919c48b446aeed Mon Sep 17 00:00:00 2001
From: Byoungchan Lee <daniel.l@hpcnt.com>
Date: Mon, 11 Apr 2022 21:56:36 +0900
Subject: [PATCH] Implement OnResolutionChange to objc RTCVideoEncoderSelector
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Bug: webrtc:12406
Change-Id: I3335d895ecd207ba9de92397cffa3b80799df4ad
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/258700
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Commit-Queue: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com>
Cr-Commit-Position: refs/heads/main@{#36589}
---
 sdk/objc/base/RTCVideoEncoderFactory.h            |  3 +++
 sdk/objc/native/src/objc_video_encoder_factory.mm | 11 +++++++++++
 2 files changed, 14 insertions(+)

diff --git a/sdk/objc/base/RTCVideoEncoderFactory.h b/sdk/objc/base/RTCVideoEncoderFactory.h
index b115b2ad39..a73cd77990 100644
--- a/sdk/objc/base/RTCVideoEncoderFactory.h
+++ b/sdk/objc/base/RTCVideoEncoderFactory.h
@@ -27,6 +27,9 @@ RTC_OBJC_EXPORT
 - (nullable RTC_OBJC_TYPE(RTCVideoCodecInfo) *)encoderForBitrate:(NSInteger)bitrate;
 - (nullable RTC_OBJC_TYPE(RTCVideoCodecInfo) *)encoderForBrokenEncoder;
 
+@optional
+- (nullable RTC_OBJC_TYPE(RTCVideoCodecInfo) *)encoderForResolutionChangeBySize:(CGSize)size;
+
 @end
 
 /** RTCVideoEncoderFactory is an Objective-C version of webrtc::VideoEncoderFactory.
diff --git a/sdk/objc/native/src/objc_video_encoder_factory.mm b/sdk/objc/native/src/objc_video_encoder_factory.mm
index f04aa89917..d4ea79cc88 100644
--- a/sdk/objc/native/src/objc_video_encoder_factory.mm
+++ b/sdk/objc/native/src/objc_video_encoder_factory.mm
@@ -134,6 +134,17 @@ class ObjcVideoEncoderSelector : public VideoEncoderFactory::EncoderSelectorInte
     return absl::nullopt;
   }
 
+  absl::optional<SdpVideoFormat> OnResolutionChange(const RenderResolution &resolution) override {
+    if ([selector_ respondsToSelector:@selector(encoderForResolutionChangeBySize:)]) {
+      RTC_OBJC_TYPE(RTCVideoCodecInfo) *info = [selector_
+          encoderForResolutionChangeBySize:CGSizeMake(resolution.Width(), resolution.Height())];
+      if (info) {
+        return [info nativeSdpVideoFormat];
+      }
+    }
+    return absl::nullopt;
+  }
+
  private:
   id<RTC_OBJC_TYPE(RTCVideoEncoderSelector)> selector_;
 };