Destroy compression session instead of reset it on release.

webrtc/sdk/objc/Framework/Classes/VideoToolbox/encoder.mm

 /*
  *  Copyright (c) 2015 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.
  *
  */
@@ skipping 516 matching lines @@
 
 int H264VideoToolboxEncoder::SetRates(uint32_t new_bitrate_kbit,
                                       uint32_t frame_rate) {
   target_bitrate_bps_ = 1000 * new_bitrate_kbit;
   bitrate_adjuster_.SetTargetBitrateBps(target_bitrate_bps_);
   SetBitrateBps(bitrate_adjuster_.GetAdjustedBitrateBps());
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 int H264VideoToolboxEncoder::Release() {
-  // Need to reset so that the session is invalidated and won't use the
+  // Need to destroy so that the session is invalidated and won't use the
   // callback anymore. Do not remove callback until the session is invalidated
   // since async encoder callbacks can occur until invalidation.
-  int ret = ResetCompressionSession();
+  DestroyCompressionSession();
   callback_ = nullptr;
-  return ret;
+  return WEBRTC_VIDEO_CODEC_OK;
 }
 
 int H264VideoToolboxEncoder::ResetCompressionSession() {
   DestroyCompressionSession();
 
   // Set source image buffer attributes. These attributes will be present on
   // buffers retrieved from the encoder's pixel buffer pool.
   const size_t attributes_size = 3;
   CFTypeRef keys[attributes_size] = {
 #if defined(WEBRTC_IOS)
@@ skipping 205 matching lines @@
 }
 
 // TODO(magjed): This function is not used by RTCVideoEncoderH264, but this whole file will be
 // removed soon and inlined as ObjC.
 VideoEncoder::ScalingSettings H264VideoToolboxEncoder::GetScalingSettings()
     const {
   return VideoEncoder::ScalingSettings(true, internal::kLowH264QpThreshold,
                                        internal::kHighH264QpThreshold);
 }
 }  // namespace webrtc