1 // Copyright (c) 2012 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_BASE_MEDIA_LOG_H_ 6 #define MEDIA_BASE_MEDIA_LOG_H_ 7 8 #include <sstream> 9 #include <string> 10 11 #include "base/memory/ref_counted.h" 12 #include "base/memory/scoped_ptr.h" 13 #include "media/base/media_export.h" 14 #include "media/base/media_log_event.h" 15 #include "media/base/pipeline.h" 16 #include "media/base/pipeline_status.h" 17 18 namespace media { 19 20 // Indicates a string should be added to the log. 21 // First parameter - The string to add to the log. 22 typedef base::Callback<void(const std::string&)> LogCB; 23 24 // Helper class to make it easier to use log_cb like DVLOG(). 25 class LogHelper { 26 public: 27 LogHelper(const LogCB& Log_cb); 28 ~LogHelper(); 29 30 std::ostream& stream() { return stream_; } 31 32 private: 33 LogCB log_cb_; 34 std::stringstream stream_; 35 }; 36 37 #define MEDIA_LOG(log_cb) LogHelper(log_cb).stream() 38 39 class MEDIA_EXPORT MediaLog : public base::RefCountedThreadSafe<MediaLog> { 40 public: 41 // Convert various enums to strings. 42 static const char* EventTypeToString(MediaLogEvent::Type type); 43 static const char* PipelineStatusToString(PipelineStatus); 44 45 MediaLog(); 46 47 // Add an event to this log. Overriden by inheritors to actually do something 48 // with it. 49 virtual void AddEvent(scoped_ptr<MediaLogEvent> event); 50 51 // Helper methods to create events and their parameters. 52 scoped_ptr<MediaLogEvent> CreateEvent(MediaLogEvent::Type type); 53 scoped_ptr<MediaLogEvent> CreateBooleanEvent( 54 MediaLogEvent::Type type, const char* property, bool value); 55 scoped_ptr<MediaLogEvent> CreateStringEvent( 56 MediaLogEvent::Type type, const char* property, const std::string& value); 57 scoped_ptr<MediaLogEvent> CreateTimeEvent( 58 MediaLogEvent::Type type, const char* property, base::TimeDelta value); 59 scoped_ptr<MediaLogEvent> CreateLoadEvent(const std::string& url); 60 scoped_ptr<MediaLogEvent> CreateSeekEvent(float seconds); 61 scoped_ptr<MediaLogEvent> CreatePipelineStateChangedEvent( 62 Pipeline::State state); 63 scoped_ptr<MediaLogEvent> CreatePipelineErrorEvent(PipelineStatus error); 64 scoped_ptr<MediaLogEvent> CreateVideoSizeSetEvent( 65 size_t width, size_t height); 66 scoped_ptr<MediaLogEvent> CreateBufferedExtentsChangedEvent( 67 int64 start, int64 current, int64 end); 68 scoped_ptr<MediaLogEvent> CreateMediaSourceErrorEvent( 69 const std::string& error); 70 71 // Report a property change without an accompanying event. 72 void SetStringProperty(const char* key, const std::string& value); 73 void SetIntegerProperty(const char* key, int value); 74 void SetDoubleProperty(const char* key, double value); 75 void SetBooleanProperty(const char* key, bool value); 76 77 protected: 78 friend class base::RefCountedThreadSafe<MediaLog>; 79 virtual ~MediaLog(); 80 81 private: 82 // A unique (to this process) id for this MediaLog. 83 int32 id_; 84 85 DISALLOW_COPY_AND_ASSIGN(MediaLog); 86 }; 87 88 } // namespace media 89 90 #endif // MEDIA_BASE_MEDIA_LOG_H_ 91
