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.
5 #ifndef MEDIA_BASE_CDM_PROMISE_H_
6 #define MEDIA_BASE_CDM_PROMISE_H_
10 #include "base/basictypes.h"
11 #include "base/callback.h"
12 #include "media/base/media_export.h"
13 #include "media/base/media_keys.h"
17 // Interface for promises being resolved/rejected in response to various
18 // session actions. These may be called synchronously or asynchronously.
19 // The promise must be resolved or rejected exactly once. It is expected that
20 // the caller free the promise once it is resolved/rejected.
22 // This is only the base class, as parameter to resolve() varies.
23 class MEDIA_EXPORT CdmPromise {
25 // A superset of media::MediaKeys::Exception for UMA reporting.
26 enum ResultCodeForUMA {
38 enum ResolveParameterType {
44 typedef base::Callback<void(MediaKeys::Exception exception_code,
46 const std::string& error_message)>
49 virtual ~CdmPromise();
51 // Used to indicate that the operation failed. |exception_code| must be
52 // specified. |system_code| is a Key System-specific value for the error
53 // that occurred, or 0 if there is no associated status code or such status
54 // codes are not supported by the Key System. |error_message| is optional.
55 virtual void reject(MediaKeys::Exception exception_code,
57 const std::string& error_message);
59 virtual ResolveParameterType GetResolveParameterType() const = 0;
63 CdmPromise(PromiseRejectedCB reject_cb);
65 // If constructed with a |uma_name| (which must be the name of a
66 // CdmPromiseResult UMA), CdmPromise will report the promise result (success
67 // or rejection code).
68 CdmPromise(PromiseRejectedCB reject_cb, const std::string& uma_name);
70 PromiseRejectedCB reject_cb_;
72 // Keep track of whether the promise hasn't been resolved or rejected yet.
75 // UMA to report result to.
76 std::string uma_name_;
78 DISALLOW_COPY_AND_ASSIGN(CdmPromise);
81 // Specialization for no parameter to resolve().
83 class MEDIA_EXPORT CdmPromiseTemplate<void> : public CdmPromise {
85 CdmPromiseTemplate(base::Callback<void(void)> resolve_cb,
86 PromiseRejectedCB rejected_cb);
87 CdmPromiseTemplate(base::Callback<void(void)> resolve_cb,
88 PromiseRejectedCB rejected_cb,
89 const std::string& uma_name);
90 virtual ~CdmPromiseTemplate();
91 virtual void resolve();
92 virtual ResolveParameterType GetResolveParameterType() const OVERRIDE;
95 // Allow subclasses to completely override the implementation.
99 base::Callback<void(void)> resolve_cb_;
101 DISALLOW_COPY_AND_ASSIGN(CdmPromiseTemplate);
105 class MEDIA_EXPORT CdmPromiseTemplate<std::string> : public CdmPromise {
107 CdmPromiseTemplate(base::Callback<void(const std::string&)> resolve_cb,
108 PromiseRejectedCB rejected_cb);
109 CdmPromiseTemplate(base::Callback<void(const std::string&)> resolve_cb,
110 PromiseRejectedCB rejected_cb,
111 const std::string& uma_name);
112 virtual ~CdmPromiseTemplate();
113 virtual void resolve(const std::string& result);
114 virtual ResolveParameterType GetResolveParameterType() const OVERRIDE;
117 // Allow subclasses to completely override the implementation.
118 // TODO(jrummell): Remove when derived class SessionLoadedPromise
119 // (in ppapi_decryptor.cc) is no longer needed.
120 CdmPromiseTemplate();
123 base::Callback<void(const std::string&)> resolve_cb_;
125 DISALLOW_COPY_AND_ASSIGN(CdmPromiseTemplate);
129 class MEDIA_EXPORT CdmPromiseTemplate<KeyIdsVector> : public CdmPromise {
131 CdmPromiseTemplate(base::Callback<void(const KeyIdsVector&)> resolve_cb,
132 PromiseRejectedCB rejected_cb);
133 CdmPromiseTemplate(base::Callback<void(const KeyIdsVector&)> resolve_cb,
134 PromiseRejectedCB rejected_cb,
135 const std::string& uma_name);
136 virtual ~CdmPromiseTemplate();
137 virtual void resolve(const KeyIdsVector& result);
138 virtual ResolveParameterType GetResolveParameterType() const OVERRIDE;
141 base::Callback<void(const KeyIdsVector&)> resolve_cb_;
143 DISALLOW_COPY_AND_ASSIGN(CdmPromiseTemplate);
148 #endif // MEDIA_BASE_CDM_PROMISE_H_