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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_ENCODED_VIDEO_UNDERLYING_SOURCE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_ENCODED_VIDEO_UNDERLYING_SOURCE_H_
#include "base/gtest_prod_util.h"
#include "base/task/single_thread_task_runner.h"
#include "base/threading/thread_checker.h"
#include "third_party/blink/renderer/core/streams/readable_stream_default_controller_with_script_scope.h"
#include "third_party/blink/renderer/core/streams/underlying_source_base.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace webrtc {
class TransformableVideoFrameInterface;
} // namespace webrtc
namespace blink {
class MODULES_EXPORT RTCEncodedVideoUnderlyingSource
: public UnderlyingSourceBase {
public:
// If |controller_override| is provided, it won't work as an instance of
// |UnderlyingSourceBase| so shouldn't be used directly, only with
// RTCEncodedUnderlyingSourceWrapper.
explicit RTCEncodedVideoUnderlyingSource(
ScriptState*,
WTF::CrossThreadOnceClosure disconnect_callback);
explicit RTCEncodedVideoUnderlyingSource(
ScriptState*,
WTF::CrossThreadOnceClosure disconnect_callback,
bool enable_frame_restrictions,
base::UnguessableToken owner_id,
ReadableStreamDefaultControllerWithScriptScope* controller_override =
nullptr);
// UnderlyingSourceBase
ScriptPromise<IDLUndefined> Pull(ScriptState*, ExceptionState&) override;
ScriptPromise<IDLUndefined> Cancel(ScriptState*,
ScriptValue reason,
ExceptionState&) override;
void OnFrameFromSource(
std::unique_ptr<webrtc::TransformableVideoFrameInterface>);
void Close();
// Called on any thread to indicate the source is being transferred to an
// UnderlyingSource on a different thread to this.
void OnSourceTransferStarted();
void Trace(Visitor*) const override;
private:
// Implements the handling of this stream being transferred to another
// context, called on the thread upon which the instance was created.
void OnSourceTransferStartedOnTaskRunner();
// In case there is controller override, this one is returned. If not,
// Controller() from the underlying source base will be returned.
ReadableStreamDefaultControllerWithScriptScope* GetController();
FRIEND_TEST_ALL_PREFIXES(RTCEncodedVideoUnderlyingSourceTest,
QueuedFramesAreDroppedWhenOverflow);
static const int kMinQueueDesiredSize;
const Member<ScriptState> script_state_;
WTF::CrossThreadOnceClosure disconnect_callback_;
// Count of frames dropped due to the queue being full, for logging.
int dropped_frames_ = 0;
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
Member<ReadableStreamDefaultControllerWithScriptScope> controller_override_;
const bool enable_frame_restrictions_;
const base::UnguessableToken owner_id_;
int64_t last_enqueued_frame_counter_ = 0;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_ENCODED_VIDEO_UNDERLYING_SOURCE_H_
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