1 // Copyright 2013 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.
5 #ifndef MEDIA_CAST_CAST_ENVIRONMENT_H_
6 #define MEDIA_CAST_CAST_ENVIRONMENT_H_
8 #include "base/basictypes.h"
9 #include "base/memory/ref_counted.h"
10 #include "base/memory/scoped_ptr.h"
11 #include "base/single_thread_task_runner.h"
12 #include "base/time/tick_clock.h"
13 #include "base/time/time.h"
14 #include "media/cast/logging/logging_defines.h"
15 #include "media/cast/logging/logging_impl.h"
20 class CastEnvironment : public base::RefCountedThreadSafe<CastEnvironment> {
22 // An enumeration of the cast threads.
24 // The main thread is where the cast system is configured and where timers
25 // and network IO is performed.
27 // The audio encoder thread is where all send side audio processing is done,
28 // primarily encoding but also re-sampling.
30 // The audio decoder thread is where all receive side audio processing is
31 // done, primarily decoding but also error concealment and re-sampling.
33 // The video encoder thread is where the video encode processing is done.
35 // The video decoder thread is where the video decode processing is done.
37 // The transport thread is where the transport processing is done.
42 scoped_ptr<base::TickClock> clock,
43 scoped_refptr<base::SingleThreadTaskRunner> main_thread_proxy,
44 scoped_refptr<base::SingleThreadTaskRunner> audio_encode_thread_proxy,
45 scoped_refptr<base::SingleThreadTaskRunner> audio_decode_thread_proxy,
46 scoped_refptr<base::SingleThreadTaskRunner> video_encode_thread_proxy,
47 scoped_refptr<base::SingleThreadTaskRunner> video_decode_thread_proxy,
48 scoped_refptr<base::SingleThreadTaskRunner> transport_thread_proxy,
49 const CastLoggingConfig& config);
51 // These are the same methods in message_loop.h, but are guaranteed to either
52 // get posted to the MessageLoop if it's still alive, or be deleted otherwise.
53 // They return true iff the thread existed and the task was posted. Note that
54 // even if the task is posted, there's no guarantee that it will run, since
55 // the target thread may already have a Quit message in its queue.
56 bool PostTask(ThreadId identifier,
57 const tracked_objects::Location& from_here,
58 const base::Closure& task);
60 bool PostDelayedTask(ThreadId identifier,
61 const tracked_objects::Location& from_here,
62 const base::Closure& task,
63 base::TimeDelta delay);
65 bool CurrentlyOn(ThreadId identifier);
67 base::TickClock* Clock() const;
69 // Logging is not thread safe. Should always be called from the main thread.
70 LoggingImpl* Logging();
72 scoped_refptr<base::SingleThreadTaskRunner>
73 GetMessageSingleThreadTaskRunnerForThread(ThreadId identifier);
75 bool HasAudioEncoderThread() {
76 return audio_encode_thread_proxy_ ? true : false;
79 bool HasVideoEncoderThread() {
80 return video_encode_thread_proxy_ ? true : false;
84 virtual ~CastEnvironment();
87 friend class base::RefCountedThreadSafe<CastEnvironment>;
89 scoped_ptr<base::TickClock> clock_;
90 scoped_refptr<base::SingleThreadTaskRunner> main_thread_proxy_;
91 scoped_refptr<base::SingleThreadTaskRunner> audio_encode_thread_proxy_;
92 scoped_refptr<base::SingleThreadTaskRunner> audio_decode_thread_proxy_;
93 scoped_refptr<base::SingleThreadTaskRunner> video_encode_thread_proxy_;
94 scoped_refptr<base::SingleThreadTaskRunner> video_decode_thread_proxy_;
95 scoped_refptr<base::SingleThreadTaskRunner> transport_thread_proxy_;
97 scoped_ptr<LoggingImpl> logging_;
99 DISALLOW_COPY_AND_ASSIGN(CastEnvironment);
105 #endif // MEDIA_CAST_CAST_ENVIRONMENT_H_