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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_RENDERER_SERVICE_H_
#define MEDIA_MOJO_SERVICES_MOJO_RENDERER_SERVICE_H_
#include <stdint.h>
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/timer/timer.h"
#include "media/base/buffering_state.h"
#include "media/base/pipeline_status.h"
#include "media/mojo/interfaces/renderer.mojom.h"
#include "mojo/public/cpp/bindings/strong_binding.h"
namespace mojo {
class Connection;
}
namespace media {
class DemuxerStreamProviderShim;
class CdmContextProvider;
class Renderer;
// A interfaces::Renderer implementation that uses media::AudioRenderer to
// decode and render audio to a sink obtained from the Connection.
class MojoRendererService : interfaces::Renderer {
public:
// |cdm_context_provider| can be used to find the CdmContext to support
// encrypted media. If null, encrypted media is not supported.
MojoRendererService(base::WeakPtr<CdmContextProvider> cdm_context_provider,
scoped_ptr<media::Renderer> renderer,
mojo::InterfaceRequest<interfaces::Renderer> request);
~MojoRendererService() final;
// interfaces::Renderer implementation.
void Initialize(interfaces::RendererClientPtr client,
interfaces::DemuxerStreamPtr audio,
interfaces::DemuxerStreamPtr video,
const mojo::Callback<void(bool)>& callback) final;
void Flush(const mojo::Closure& callback) final;
void StartPlayingFrom(int64_t time_delta_usec) final;
void SetPlaybackRate(double playback_rate) final;
void SetVolume(float volume) final;
void SetCdm(int32_t cdm_id, const mojo::Callback<void(bool)>& callback) final;
private:
enum State {
STATE_UNINITIALIZED,
STATE_INITIALIZING,
STATE_FLUSHING,
STATE_PLAYING,
STATE_ERROR
};
// Called when the DemuxerStreamProviderShim is ready to go (has a config,
// pipe handle, etc) and can be handed off to a renderer for use.
void OnStreamReady(const mojo::Callback<void(bool)>& callback);
// Called when |audio_renderer_| initialization has completed.
void OnRendererInitializeDone(const mojo::Callback<void(bool)>& callback,
PipelineStatus status);
// Callback executed by filters to update statistics.
void OnUpdateStatistics(const PipelineStatistics& stats);
// Periodically polls the media time from the renderer and notifies the client
// if the media time has changed since the last update. If |force| is true,
// the client is notified even if the time is unchanged.
void UpdateMediaTime(bool force);
void CancelPeriodicMediaTimeUpdates();
void SchedulePeriodicMediaTimeUpdates();
// Callback executed by audio renderer when buffering state changes.
// TODO(tim): Need old and new.
void OnBufferingStateChanged(BufferingState new_buffering_state);
// Callback executed when a renderer has ended.
void OnRendererEnded();
// Callback executed when a runtime error happens.
void OnError(PipelineStatus error);
// Callback executed once Flush() completes.
void OnFlushCompleted(const mojo::Closure& callback);
// Callback executed once SetCdm() completes.
void OnCdmAttached(const mojo::Callback<void(bool)>& callback, bool success);
mojo::StrongBinding<interfaces::Renderer> binding_;
base::WeakPtr<CdmContextProvider> cdm_context_provider_;
State state_;
// Note: |stream_provider_| must be destructed after |renderer_| to avoid
// access violation.
scoped_ptr<DemuxerStreamProviderShim> stream_provider_;
scoped_ptr<media::Renderer> renderer_;
base::RepeatingTimer time_update_timer_;
uint64_t last_media_time_usec_;
interfaces::RendererClientPtr client_;
base::WeakPtr<MojoRendererService> weak_this_;
base::WeakPtrFactory<MojoRendererService> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(MojoRendererService);
};
} // namespace media
#endif // MEDIA_MOJO_SERVICES_MOJO_RENDERER_SERVICE_H_