content/common/media/media_stream_options.cc

   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 #include "content/common/media/media_stream_options.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace content {
  10
  11 const char kMediaStreamSource[] = "chromeMediaSource";
  12 const char kMediaStreamSourceId[] = "chromeMediaSourceId";
  13 const char kMediaStreamSourceInfoId[] = "sourceId";
  14 const char kMediaStreamSourceTab[] = "tab";
  15 const char kMediaStreamSourceScreen[] = "screen";
  16 const char kMediaStreamSourceDesktop[] = "desktop";
  17 const char kMediaStreamSourceSystem[] = "system";
  18 const char kMediaStreamRenderToAssociatedSink[] =
  19     "chromeRenderToAssociatedSink";
  20 // The prefix of this constant is 'goog' to match with other getUserMedia
  21 // constraints for audio.
  22 const char kMediaStreamAudioDucking[] = "googDucking";
  23
  24 namespace {
  25
  26 bool GetFirstConstraintByName(const StreamOptions::Constraints& constraints,
  27                               const std::string& name,
  28                               std::string* value) {
  29   for (StreamOptions::Constraints::const_iterator it = constraints.begin();
  30       it != constraints.end(); ++it ) {
  31     if (it->name == name) {
  32       *value = it->value;
  33       return true;
  34     }
  35   }
  36   return false;
  37 }
  38
  39 bool GetFirstConstraintByName(const StreamOptions::Constraints& mandatory,
  40                               const StreamOptions::Constraints& optional,
  41                               const std::string& name,
  42                               std::string* value,
  43                               bool* is_mandatory) {
  44   if (GetFirstConstraintByName(mandatory, name, value)) {
  45     if (is_mandatory)
  46       *is_mandatory = true;
  47     return true;
  48   }
  49   if (is_mandatory)
  50     *is_mandatory = false;
  51   return GetFirstConstraintByName(optional, name, value);
  52 }
  53
  54 } // namespace
  55
  56 StreamOptions::StreamOptions()
  57     : audio_requested(false),
  58       video_requested(false) {}
  59
  60 StreamOptions::StreamOptions(bool request_audio, bool request_video)
  61     :  audio_requested(request_audio), video_requested(request_video) {
  62 }
  63
  64 StreamOptions::~StreamOptions() {}
  65
  66 StreamOptions::Constraint::Constraint() {}
  67
  68 StreamOptions::Constraint::Constraint(const std::string& name,
  69                                       const std::string& value)
  70     : name(name), value(value) {
  71 }
  72
  73 bool StreamOptions::GetFirstAudioConstraintByName(const std::string& name,
  74                                                   std::string* value,
  75                                                   bool* is_mandatory) const {
  76   return GetFirstConstraintByName(mandatory_audio, optional_audio, name, value,
  77                                   is_mandatory);
  78 }
  79
  80 bool StreamOptions::GetFirstVideoConstraintByName(const std::string& name,
  81                                                   std::string* value,
  82                                                   bool* is_mandatory) const {
  83   return GetFirstConstraintByName(mandatory_video, optional_video, name, value,
  84                                   is_mandatory);
  85 }
  86
  87 // static
  88 void StreamOptions::GetConstraintsByName(
  89     const StreamOptions::Constraints& constraints,
  90     const std::string& name,
  91     std::vector<std::string>* values) {
  92   for (StreamOptions::Constraints::const_iterator it = constraints.begin();
  93       it != constraints.end(); ++it ) {
  94     if (it->name == name)
  95       values->push_back(it->value);
  96   }
  97 }
  98
  99 // static
 100 const int StreamDeviceInfo::kNoId = -1;
 101
 102 StreamDeviceInfo::StreamDeviceInfo()
 103     : session_id(kNoId) {}
 104
 105 StreamDeviceInfo::StreamDeviceInfo(MediaStreamType service_param,
 106                                    const std::string& name_param,
 107                                    const std::string& device_param)
 108     : device(service_param, device_param, name_param),
 109       session_id(kNoId) {
 110 }
 111
 112 StreamDeviceInfo::StreamDeviceInfo(MediaStreamType service_param,
 113                                    const std::string& name_param,
 114                                    const std::string& device_param,
 115                                    int sample_rate,
 116                                    int channel_layout,
 117                                    int frames_per_buffer)
 118     : device(service_param, device_param, name_param, sample_rate,
 119              channel_layout, frames_per_buffer),
 120       session_id(kNoId) {
 121 }
 122
 123 // static
 124 bool StreamDeviceInfo::IsEqual(const StreamDeviceInfo& first,
 125                                const StreamDeviceInfo& second) {
 126   return first.device.IsEqual(second.device) &&
 127       first.session_id == second.session_id;
 128 }
 129
 130 }  // namespace content