1 /*
2 * libjingle
3 * Copyright 2013 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "talk/app/webrtc/localaudiosource.h"
29
30 #include <vector>
31
32 #include "talk/app/webrtc/mediaconstraintsinterface.h"
33 #include "talk/media/base/mediaengine.h"
34
35 using webrtc::MediaConstraintsInterface;
36 using webrtc::MediaSourceInterface;
37
38 namespace webrtc {
39
40 namespace {
41
42 // Convert constraints to audio options. Return false if constraints are
43 // invalid.
FromConstraints(const MediaConstraintsInterface::Constraints & constraints,cricket::AudioOptions * options)44 void FromConstraints(const MediaConstraintsInterface::Constraints& constraints,
45 cricket::AudioOptions* options) {
46 // This design relies on the fact that all the audio constraints are actually
47 // "options", i.e. boolean-valued and always satisfiable. If the constraints
48 // are extended to include non-boolean values or actual format constraints,
49 // a different algorithm will be required.
50 struct {
51 const char* name;
52 rtc::Optional<bool>& value;
53 } key_to_value[] = {
54 {MediaConstraintsInterface::kGoogEchoCancellation,
55 options->echo_cancellation},
56 {MediaConstraintsInterface::kExtendedFilterEchoCancellation,
57 options->extended_filter_aec},
58 {MediaConstraintsInterface::kDAEchoCancellation,
59 options->delay_agnostic_aec},
60 {MediaConstraintsInterface::kAutoGainControl, options->auto_gain_control},
61 {MediaConstraintsInterface::kExperimentalAutoGainControl,
62 options->experimental_agc},
63 {MediaConstraintsInterface::kNoiseSuppression,
64 options->noise_suppression},
65 {MediaConstraintsInterface::kExperimentalNoiseSuppression,
66 options->experimental_ns},
67 {MediaConstraintsInterface::kHighpassFilter, options->highpass_filter},
68 {MediaConstraintsInterface::kTypingNoiseDetection,
69 options->typing_detection},
70 {MediaConstraintsInterface::kAudioMirroring, options->stereo_swapping},
71 {MediaConstraintsInterface::kAecDump, options->aec_dump}
72 };
73
74 for (const auto& constraint : constraints) {
75 bool value = false;
76 if (!rtc::FromString(constraint.value, &value))
77 continue;
78
79 for (auto& entry : key_to_value) {
80 if (constraint.key.compare(entry.name) == 0)
81 entry.value = rtc::Optional<bool>(value);
82 }
83 }
84 }
85
86 } // namespace
87
Create(const PeerConnectionFactoryInterface::Options & options,const MediaConstraintsInterface * constraints)88 rtc::scoped_refptr<LocalAudioSource> LocalAudioSource::Create(
89 const PeerConnectionFactoryInterface::Options& options,
90 const MediaConstraintsInterface* constraints) {
91 rtc::scoped_refptr<LocalAudioSource> source(
92 new rtc::RefCountedObject<LocalAudioSource>());
93 source->Initialize(options, constraints);
94 return source;
95 }
96
Initialize(const PeerConnectionFactoryInterface::Options & options,const MediaConstraintsInterface * constraints)97 void LocalAudioSource::Initialize(
98 const PeerConnectionFactoryInterface::Options& options,
99 const MediaConstraintsInterface* constraints) {
100 if (!constraints)
101 return;
102
103 // Apply optional constraints first, they will be overwritten by mandatory
104 // constraints.
105 FromConstraints(constraints->GetOptional(), &options_);
106
107 cricket::AudioOptions mandatory_options;
108 FromConstraints(constraints->GetMandatory(), &mandatory_options);
109 options_.SetAll(mandatory_options);
110 source_state_ = kLive;
111 }
112
113 } // namespace webrtc
114