media/mojo/services/mojo_media_client.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_MOJO_SERVICES_MOJO_MEDIA_CLIENT_H_
   6 #define MEDIA_MOJO_SERVICES_MOJO_MEDIA_CLIENT_H_
   7
   8 #include "base/lazy_instance.h"
   9 #include "base/memory/scoped_vector.h"
  10 #include "base/single_thread_task_runner.h"
  11 #include "media/base/audio_decoder.h"
  12 #include "media/base/audio_hardware_config.h"
  13 #include "media/base/audio_renderer_sink.h"
  14 #include "media/base/cdm_factory.h"
  15 #include "media/base/media_log.h"
  16 #include "media/base/renderer_factory.h"
  17 #include "media/base/video_decoder.h"
  18 #include "media/base/video_renderer_sink.h"
  19
  20 namespace media {
  21
  22 // Interface class which clients will extend to override (at compile time) the
  23 // default configurations for mojo media services.
  24 class PlatformMojoMediaClient {
  25  public:
  26   virtual ~PlatformMojoMediaClient() {};
  27
  28   // Returns the RendererFactory to be used by MojoRendererService. If returns
  29   // null, a RendererImpl will be used with audio/video decoders provided in
  30   // CreateAudioDecoders() and CreateVideoDecoders().
  31   virtual scoped_ptr<RendererFactory> CreateRendererFactory(
  32       const scoped_refptr<MediaLog>& media_log) = 0;
  33
  34   // The list of audio or video decoders for use with RendererImpl when
  35   // CreateRendererFactory() returns null. Ownership of the decoders is passed
  36   // to the caller. The methods on each decoder will only be called on
  37   // |media_task_runner|. |media_log| should be used to log errors or important
  38   // status information.
  39   virtual ScopedVector<AudioDecoder> CreateAudioDecoders(
  40       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
  41       const scoped_refptr<MediaLog>& media_log) = 0;
  42   virtual ScopedVector<VideoDecoder> CreateVideoDecoders(
  43       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
  44       const scoped_refptr<MediaLog>& media_log) = 0;
  45
  46   // The output sink used for rendering audio or video respectively.
  47   virtual scoped_refptr<AudioRendererSink> CreateAudioRendererSink() = 0;
  48   virtual scoped_ptr<VideoRendererSink> CreateVideoRendererSink(
  49       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner) = 0;
  50
  51   // The platform's audio hardware configuration.  Note, this must remain
  52   // constant for the lifetime of the PlatformMojoMediaClient.
  53   virtual const AudioHardwareConfig& GetAudioHardwareConfig() = 0;
  54
  55   // Returns the CdmFactory to be used by MojoCdmService.
  56   virtual scoped_ptr<CdmFactory> CreateCdmFactory() = 0;
  57 };
  58
  59 class MojoMediaClient {
  60  public:
  61   // Returns an instance of the MojoMediaClient object.  Only one instance will
  62   // exist per process.
  63   static MojoMediaClient* Get();
  64
  65   // Copy of the PlatformMojoMediaClient interface.
  66   scoped_ptr<RendererFactory> CreateRendererFactory(
  67       const scoped_refptr<MediaLog>& media_log);
  68   ScopedVector<AudioDecoder> CreateAudioDecoders(
  69       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
  70       const scoped_refptr<MediaLog>& media_log);
  71   ScopedVector<VideoDecoder> CreateVideoDecoders(
  72       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
  73       const scoped_refptr<MediaLog>& media_log);
  74   scoped_refptr<AudioRendererSink> CreateAudioRendererSink();
  75   scoped_ptr<VideoRendererSink> CreateVideoRendererSink(
  76       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
  77   const AudioHardwareConfig& GetAudioHardwareConfig();
  78   scoped_ptr<CdmFactory> CreateCdmFactory();
  79
  80  private:
  81   friend struct base::DefaultLazyInstanceTraits<MojoMediaClient>;
  82
  83   MojoMediaClient();
  84   ~MojoMediaClient();
  85
  86   scoped_ptr<PlatformMojoMediaClient> mojo_media_client_;
  87
  88   DISALLOW_COPY_AND_ASSIGN(MojoMediaClient);
  89 };
  90
  91 }  // namespace media
  92
  93 #endif  // MEDIA_MOJO_SERVICES_MOJO_MEDIA_CLIENT_H_