Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 74 insertions, 0 deletions

diff --git a/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h b/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h
new file mode 100644
index 0000000000..04ad7c4695
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h
@@ -0,0 +1,74 @@
+/*
+ *  Copyright (c) 2020 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.
+ */
+
+#ifndef AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_
+#define AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_
+
+#include <memory>
+
+#include "api/frame_transformer_interface.h"
+#include "api/sequence_checker.h"
+#include "rtc_base/system/no_unique_address.h"
+#include "rtc_base/task_queue.h"
+#include "rtc_base/thread.h"
+
+namespace webrtc {
+
+// Delegates calls to FrameTransformerInterface to transform frames, and to
+// ChannelReceive to receive the transformed frames using the
+// `receive_frame_callback_` on the `channel_receive_thread_`.
+class ChannelReceiveFrameTransformerDelegate : public TransformedFrameCallback {
+ public:
+  using ReceiveFrameCallback =
+      std::function<void(rtc::ArrayView<const uint8_t> packet,
+                         const RTPHeader& header)>;
+  ChannelReceiveFrameTransformerDelegate(
+      ReceiveFrameCallback receive_frame_callback,
+      rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+      TaskQueueBase* channel_receive_thread);
+
+  // Registers `this` as callback for `frame_transformer_`, to get the
+  // transformed frames.
+  void Init();
+
+  // Unregisters and releases the `frame_transformer_` reference, and resets
+  // `receive_frame_callback_` on `channel_receive_thread_`. Called from
+  // ChannelReceive destructor to prevent running the callback on a dangling
+  // channel.
+  void Reset();
+
+  // Delegates the call to FrameTransformerInterface::Transform, to transform
+  // the frame asynchronously.
+  void Transform(rtc::ArrayView<const uint8_t> packet,
+                 const RTPHeader& header,
+                 uint32_t ssrc);
+
+  // Implements TransformedFrameCallback. Can be called on any thread.
+  void OnTransformedFrame(
+      std::unique_ptr<TransformableFrameInterface> frame) override;
+
+  // Delegates the call to ChannelReceive::OnReceivedPayloadData on the
+  // `channel_receive_thread_`, by calling `receive_frame_callback_`.
+  void ReceiveFrame(std::unique_ptr<TransformableFrameInterface> frame) const;
+
+ protected:
+  ~ChannelReceiveFrameTransformerDelegate() override = default;
+
+ private:
+  RTC_NO_UNIQUE_ADDRESS SequenceChecker sequence_checker_;
+  ReceiveFrameCallback receive_frame_callback_
+      RTC_GUARDED_BY(sequence_checker_);
+  rtc::scoped_refptr<FrameTransformerInterface> frame_transformer_
+      RTC_GUARDED_BY(sequence_checker_);
+  TaskQueueBase* const channel_receive_thread_;
+};
+
+}  // namespace webrtc
+#endif  // AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_