1 | /* |
2 | * Copyright (C) 2018 Metrological Group B.V. |
3 | * Author: Thibault Saunier <tsaunier@igalia.com> |
4 | * Author: Alejandro G. Castro <alex@igalia.com> |
5 | * |
6 | * This library is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Library General Public |
8 | * License as published by the Free Software Foundation; either |
9 | * version 2 of the License, or (at your option) any later version. |
10 | * |
11 | * This library is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | * Library General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU Library General Public License |
17 | * aint with this library; see the file COPYING.LIB. If not, write to |
18 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
19 | * Boston, MA 02110-1301, USA. |
20 | */ |
21 | |
22 | #include "config.h" |
23 | |
24 | #if ENABLE(MEDIA_STREAM) && USE(LIBWEBRTC) && USE(GSTREAMER) |
25 | #include "GStreamerAudioCaptureSource.h" |
26 | |
27 | #include "GStreamerAudioData.h" |
28 | #include "GStreamerAudioStreamDescription.h" |
29 | #include "GStreamerCaptureDeviceManager.h" |
30 | |
31 | #include <gst/app/gstappsink.h> |
32 | #include <gst/gst.h> |
33 | #include <wtf/NeverDestroyed.h> |
34 | |
35 | namespace WebCore { |
36 | |
37 | static CapabilityValueOrRange defaultVolumeCapability() |
38 | { |
39 | return CapabilityValueOrRange(0.0, 1.0); |
40 | } |
41 | const static RealtimeMediaSourceCapabilities::EchoCancellation defaultEchoCancellationCapability = RealtimeMediaSourceCapabilities::EchoCancellation::ReadWrite; |
42 | |
43 | GST_DEBUG_CATEGORY(webkit_audio_capture_source_debug); |
44 | #define GST_CAT_DEFAULT webkit_audio_capture_source_debug |
45 | |
46 | static void initializeGStreamerDebug() |
47 | { |
48 | static std::once_flag debugRegisteredFlag; |
49 | std::call_once(debugRegisteredFlag, [] { |
50 | GST_DEBUG_CATEGORY_INIT(webkit_audio_capture_source_debug, "webkitaudiocapturesource" , 0, "WebKit Audio Capture Source." ); |
51 | }); |
52 | } |
53 | |
54 | class GStreamerAudioCaptureSourceFactory : public AudioCaptureFactory { |
55 | public: |
56 | CaptureSourceOrError createAudioCaptureSource(const CaptureDevice& device, String&& hashSalt, const MediaConstraints* constraints) final |
57 | { |
58 | return GStreamerAudioCaptureSource::create(String { device.persistentId() }, WTFMove(hashSalt), constraints); |
59 | } |
60 | private: |
61 | CaptureDeviceManager& audioCaptureDeviceManager() final { return GStreamerAudioCaptureDeviceManager::singleton(); } |
62 | }; |
63 | |
64 | static GStreamerAudioCaptureSourceFactory& libWebRTCAudioCaptureSourceFactory() |
65 | { |
66 | static NeverDestroyed<GStreamerAudioCaptureSourceFactory> factory; |
67 | return factory.get(); |
68 | } |
69 | |
70 | CaptureSourceOrError GStreamerAudioCaptureSource::create(String&& deviceID, String&& hashSalt, const MediaConstraints* constraints) |
71 | { |
72 | auto device = GStreamerAudioCaptureDeviceManager::singleton().gstreamerDeviceWithUID(deviceID); |
73 | if (!device) { |
74 | auto errorMessage = makeString("GStreamerAudioCaptureSource::create(): GStreamer did not find the device: " , deviceID, '.'); |
75 | return CaptureSourceOrError(WTFMove(errorMessage)); |
76 | } |
77 | |
78 | auto source = adoptRef(*new GStreamerAudioCaptureSource(device.value(), WTFMove(hashSalt))); |
79 | |
80 | if (constraints) { |
81 | if (auto result = source->applyConstraints(*constraints)) |
82 | return WTFMove(result->badConstraint); |
83 | } |
84 | return CaptureSourceOrError(WTFMove(source)); |
85 | } |
86 | |
87 | AudioCaptureFactory& GStreamerAudioCaptureSource::factory() |
88 | { |
89 | return libWebRTCAudioCaptureSourceFactory(); |
90 | } |
91 | |
92 | GStreamerAudioCaptureSource::GStreamerAudioCaptureSource(GStreamerCaptureDevice device, String&& hashSalt) |
93 | : RealtimeMediaSource(RealtimeMediaSource::Type::Audio, String { device.persistentId() }, String { device.label() }, WTFMove(hashSalt)) |
94 | , m_capturer(std::make_unique<GStreamerAudioCapturer>(device)) |
95 | { |
96 | initializeGStreamerDebug(); |
97 | } |
98 | |
99 | GStreamerAudioCaptureSource::GStreamerAudioCaptureSource(String&& deviceID, String&& name, String&& hashSalt) |
100 | : RealtimeMediaSource(RealtimeMediaSource::Type::Audio, WTFMove(deviceID), WTFMove(name), WTFMove(hashSalt)) |
101 | , m_capturer(std::make_unique<GStreamerAudioCapturer>()) |
102 | { |
103 | initializeGStreamerDebug(); |
104 | } |
105 | |
106 | GStreamerAudioCaptureSource::~GStreamerAudioCaptureSource() |
107 | { |
108 | } |
109 | |
110 | void GStreamerAudioCaptureSource::startProducingData() |
111 | { |
112 | m_capturer->setupPipeline(); |
113 | m_capturer->setSampleRate(sampleRate()); |
114 | g_signal_connect(m_capturer->sink(), "new-sample" , G_CALLBACK(newSampleCallback), this); |
115 | m_capturer->play(); |
116 | } |
117 | |
118 | GstFlowReturn GStreamerAudioCaptureSource::newSampleCallback(GstElement* sink, GStreamerAudioCaptureSource* source) |
119 | { |
120 | auto sample = adoptGRef(gst_app_sink_pull_sample(GST_APP_SINK(sink))); |
121 | |
122 | // FIXME - figure out a way to avoid copying (on write) the data. |
123 | GstBuffer* buf = gst_sample_get_buffer(sample.get()); |
124 | auto frames(std::unique_ptr<GStreamerAudioData>(new GStreamerAudioData(WTFMove(sample)))); |
125 | auto streamDesc(std::unique_ptr<GStreamerAudioStreamDescription>(new GStreamerAudioStreamDescription(frames->getAudioInfo()))); |
126 | |
127 | source->audioSamplesAvailable( |
128 | MediaTime(GST_TIME_AS_USECONDS(GST_BUFFER_PTS(buf)), G_USEC_PER_SEC), |
129 | *frames, *streamDesc, gst_buffer_get_size(buf) / frames->getAudioInfo().bpf); |
130 | |
131 | return GST_FLOW_OK; |
132 | } |
133 | |
134 | void GStreamerAudioCaptureSource::stopProducingData() |
135 | { |
136 | g_signal_handlers_disconnect_by_func(m_capturer->sink(), reinterpret_cast<gpointer>(newSampleCallback), this); |
137 | m_capturer->stop(); |
138 | } |
139 | |
140 | const RealtimeMediaSourceCapabilities& GStreamerAudioCaptureSource::capabilities() |
141 | { |
142 | if (m_capabilities) |
143 | return m_capabilities.value(); |
144 | |
145 | uint i; |
146 | GRefPtr<GstCaps> caps = m_capturer->caps(); |
147 | int minSampleRate = 0, maxSampleRate = 0; |
148 | for (i = 0; i < gst_caps_get_size(caps.get()); i++) { |
149 | int capabilityMinSampleRate = 0, capabilityMaxSampleRate = 0; |
150 | GstStructure* str = gst_caps_get_structure(caps.get(), i); |
151 | |
152 | // Only accept raw audio for now. |
153 | if (!gst_structure_has_name(str, "audio/x-raw" )) |
154 | continue; |
155 | |
156 | gst_structure_get(str, "rate" , GST_TYPE_INT_RANGE, &capabilityMinSampleRate, &capabilityMaxSampleRate, nullptr); |
157 | if (i > 0) { |
158 | minSampleRate = std::min(minSampleRate, capabilityMinSampleRate); |
159 | maxSampleRate = std::max(maxSampleRate, capabilityMaxSampleRate); |
160 | } else { |
161 | minSampleRate = capabilityMinSampleRate; |
162 | maxSampleRate = capabilityMaxSampleRate; |
163 | } |
164 | } |
165 | |
166 | RealtimeMediaSourceCapabilities capabilities(settings().supportedConstraints()); |
167 | capabilities.setDeviceId(hashedId()); |
168 | capabilities.setEchoCancellation(defaultEchoCancellationCapability); |
169 | capabilities.setVolume(defaultVolumeCapability()); |
170 | capabilities.setSampleRate(CapabilityValueOrRange(minSampleRate, maxSampleRate)); |
171 | m_capabilities = WTFMove(capabilities); |
172 | |
173 | return m_capabilities.value(); |
174 | } |
175 | |
176 | void GStreamerAudioCaptureSource::settingsDidChange(OptionSet<RealtimeMediaSourceSettings::Flag> settings) |
177 | { |
178 | if (settings.contains(RealtimeMediaSourceSettings::Flag::SampleRate)) |
179 | m_capturer->setSampleRate(sampleRate()); |
180 | } |
181 | |
182 | const RealtimeMediaSourceSettings& GStreamerAudioCaptureSource::settings() |
183 | { |
184 | if (!m_currentSettings) { |
185 | RealtimeMediaSourceSettings settings; |
186 | settings.setDeviceId(hashedId()); |
187 | |
188 | RealtimeMediaSourceSupportedConstraints supportedConstraints; |
189 | supportedConstraints.setSupportsDeviceId(true); |
190 | supportedConstraints.setSupportsEchoCancellation(true); |
191 | supportedConstraints.setSupportsVolume(true); |
192 | supportedConstraints.setSupportsSampleRate(true); |
193 | settings.setSupportedConstraints(supportedConstraints); |
194 | |
195 | m_currentSettings = WTFMove(settings); |
196 | } |
197 | |
198 | m_currentSettings->setVolume(volume()); |
199 | m_currentSettings->setSampleRate(sampleRate()); |
200 | m_currentSettings->setEchoCancellation(echoCancellation()); |
201 | |
202 | return m_currentSettings.value(); |
203 | } |
204 | |
205 | } // namespace WebCore |
206 | |
207 | #endif // ENABLE(MEDIA_STREAM) && USE(LIBWEBRTC) && USE(GSTREAMER) |
208 | |