content/renderer/media/rtc_media_constraints.h

   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 CONTENT_RENDERER_MEDIA_RTC_MEDIA_CONSTRAINTS_H_
   6 #define CONTENT_RENDERER_MEDIA_RTC_MEDIA_CONSTRAINTS_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "content/common/content_export.h"
  10 #include "third_party/libjingle/source/talk/app/webrtc/mediaconstraintsinterface.h"
  11
  12 namespace blink {
  13 class WebMediaConstraints;
  14 }
  15
  16 namespace content {
  17
  18 // RTCMediaConstraints acts as a glue layer between WebKits MediaConstraints and
  19 // libjingle webrtc::MediaConstraintsInterface.
  20 // Constraints are used by PeerConnection and getUserMedia API calls.
  21 class CONTENT_EXPORT RTCMediaConstraints
  22     : public NON_EXPORTED_BASE(webrtc::MediaConstraintsInterface) {
  23  public:
  24   RTCMediaConstraints();
  25   explicit RTCMediaConstraints(
  26       const blink::WebMediaConstraints& constraints);
  27   ~RTCMediaConstraints() override;
  28   const Constraints& GetMandatory() const override;
  29   const Constraints& GetOptional() const override;
  30   // Adds a mandatory constraint, optionally overriding an existing one.
  31   // If the constraint is already set and |override_if_exists| is false,
  32   // the function will return false, otherwise true.
  33   bool AddMandatory(const std::string& key, const std::string& value,
  34                     bool override_if_exists);
  35   // As above, but against the optional constraints.
  36   bool AddOptional(const std::string& key, const std::string& value,
  37                    bool override_if_exists);
  38
  39  protected:
  40   bool AddConstraint(Constraints* constraints,
  41                      const std::string& key,
  42                      const std::string& value,
  43                      bool override_if_exists);
  44   Constraints mandatory_;
  45   Constraints optional_;
  46 };
  47
  48 }  // namespace content
  49
  50
  51 #endif  // CONTENT_RENDERER_MEDIA_RTC_MEDIA_CONSTRAINTS_H_