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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_MOJO_SERVICES_MOJO_DEMUXER_STREAM_ADAPTER_H_
#define MEDIA_MOJO_SERVICES_MOJO_DEMUXER_STREAM_ADAPTER_H_
#include <memory>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/optional.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/demuxer_stream.h"
#include "media/base/video_decoder_config.h"
#include "media/mojo/mojom/demuxer_stream.mojom.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace media {
class MojoDecoderBufferReader;
// This class acts as a MojoRendererService-side stub for a real DemuxerStream
// that is part of a Pipeline in a remote application. Roughly speaking, it
// takes a mojo::Remote<mojom::DemuxerStream> and exposes it as a DemuxerStream
// for use by media components.
class MojoDemuxerStreamAdapter : public DemuxerStream {
public:
// |demuxer_stream| is connected to the mojom::DemuxerStream that |this|
// will
// become the client of.
// |stream_ready_cb| will be invoked when |demuxer_stream| has fully
// initialized and |this| is ready for use.
// NOTE: Illegal to call any methods until |stream_ready_cb| is invoked.
MojoDemuxerStreamAdapter(
mojo::PendingRemote<mojom::DemuxerStream> demuxer_stream,
base::OnceClosure stream_ready_cb);
~MojoDemuxerStreamAdapter() override;
// DemuxerStream implementation.
void Read(ReadCB read_cb) override;
AudioDecoderConfig audio_decoder_config() override;
VideoDecoderConfig video_decoder_config() override;
Type type() const override;
void EnableBitstreamConverter() override;
bool SupportsConfigChanges() override;
private:
void OnStreamReady(Type type,
mojo::ScopedDataPipeConsumerHandle consumer_handle,
const base::Optional<AudioDecoderConfig>& audio_config,
const base::Optional<VideoDecoderConfig>& video_config);
// The callback from |demuxer_stream_| that a read operation has completed.
// |read_cb| is a callback from the client who invoked Read() on |this|.
void OnBufferReady(Status status,
mojom::DecoderBufferPtr buffer,
const base::Optional<AudioDecoderConfig>& audio_config,
const base::Optional<VideoDecoderConfig>& video_config);
void OnBufferRead(scoped_refptr<DecoderBuffer> buffer);
void UpdateConfig(const base::Optional<AudioDecoderConfig>& audio_config,
const base::Optional<VideoDecoderConfig>& video_config);
// See constructor for descriptions.
mojo::Remote<mojom::DemuxerStream> demuxer_stream_;
base::OnceClosure stream_ready_cb_;
// The last ReadCB received through a call to Read().
// Used to store the results of OnBufferReady() in the event it is called
// with Status::kConfigChanged and we don't have an up to date
// AudioDecoderConfig yet. In that case we can't forward the results
// on to the caller of Read() until OnAudioDecoderConfigChanged is observed.
ReadCB read_cb_;
// The current config.
AudioDecoderConfig audio_config_;
VideoDecoderConfig video_config_;
Type type_;
std::unique_ptr<MojoDecoderBufferReader> mojo_decoder_buffer_reader_;
base::WeakPtrFactory<MojoDemuxerStreamAdapter> weak_factory_{this};
DISALLOW_COPY_AND_ASSIGN(MojoDemuxerStreamAdapter);
};
} // namespace media
#endif // MEDIA_MOJO_SERVICES_MOJO_DEMUXER_STREAM_ADAPTER_H_
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