chromium/components/cast_streaming/browser/frame/stream_consumer.h

// 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 COMPONENTS_CAST_STREAMING_BROWSER_FRAME_STREAM_CONSUMER_H_
#define COMPONENTS_CAST_STREAMING_BROWSER_FRAME_STREAM_CONSUMER_H_

#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "components/cast_streaming/browser/common/decoder_buffer_factory.h"
#include "media/mojo/mojom/media_types.mojom.h"
#include "mojo/public/cpp/system/data_pipe.h"
#include "mojo/public/cpp/system/simple_watcher.h"
#include "third_party/openscreen/src/cast/streaming/receiver.h"
#include "third_party/openscreen/src/cast/streaming/receiver_session.h"

namespace cast_streaming {

// Attaches to an Open Screen Receiver to receive buffers of encoded data and
// invokes |frame_received_cb_| with each buffer.
//
// Internally, this class writes buffers of encoded data directly to
// |data_pipe_| rather than using a helper class like MojoDecoderBufferWriter.
// This allows us to use |data_pipe_| as an end-to-end buffer to cap memory
// usage. Receiving new buffers is delayed until the pipe has free memory again.
// The Open Screen library takes care of discarding buffers that are too old and
// requesting new key frames as needed.
class StreamConsumer final : public openscreen::cast::Receiver::Consumer { … };

}  // namespace cast_streaming

#endif  // COMPONENTS_CAST_STREAMING_BROWSER_FRAME_STREAM_CONSUMER_H_