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Issue 2144623003: [sensors] Introduce Generic Sensor API interfaces (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Definition for PlatformSensorProvider ctor/dtor Created 4 years, 4 months ago
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1 // Copyright 2016 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 "device/generic_sensor/sensor_provider_impl.h"
6
7 #include <utility>
8
9 #include "device/generic_sensor/platform_sensor_provider.h"
10 #include "device/generic_sensor/sensor_impl.h"
11
12 namespace device {
13
14 namespace {
15
16 uint64_t GetBufferOffset(mojom::SensorType type) {
17 return (static_cast<uint64_t>(mojom::SensorType::LAST) -
18 static_cast<uint64_t>(type)) *
19 mojom::SensorReadBuffer::kReadBufferSize;
20 }
21
22 } // namespace
23
24 // static
25 void SensorProviderImpl::Create(
26 mojo::InterfaceRequest<mojom::SensorProvider> request) {
27 PlatformSensorProvider* provider = PlatformSensorProvider::GetInstance();
28 if (provider)
29 new SensorProviderImpl(std::move(request), provider);
30 }
31
32 SensorProviderImpl::SensorProviderImpl(
33 mojo::InterfaceRequest<mojom::SensorProvider> request,
34 PlatformSensorProvider* provider)
35 : binding_(this, std::move(request)), provider_(provider) {
36 DCHECK(provider_);
37 }
38
39 SensorProviderImpl::~SensorProviderImpl() {}
40
41 void SensorProviderImpl::GetSensor(mojom::SensorType type,
42 mojom::SensorRequest sensor_request,
43 const GetSensorCallback& callback) {
44 auto cloned_handle = provider_->CloneSharedBufferHandle();
45 if (!cloned_handle.is_valid()) {
46 callback.Run(nullptr, nullptr);
47 return;
48 }
49
50 scoped_refptr<PlatformSensor> sensor = provider_->GetSensor(type);
51 if (!sensor) {
52 sensor = provider_->CreateSensor(
53 type, mojom::SensorReadBuffer::kReadBufferSize, GetBufferOffset(type));
54 }
55
56 if (!sensor) {
57 callback.Run(nullptr, nullptr);
58 return;
59 }
60
61 auto sensor_impl = new SensorImpl(std::move(sensor_request), sensor);
62
63 auto sensor_read_buffer = mojom::SensorReadBuffer::New();
64 sensor_read_buffer->memory = std::move(cloned_handle);
65 sensor_read_buffer->offset = GetBufferOffset(type);
66 sensor_read_buffer->mode = sensor->GetReportingMode();
67
68 callback.Run(std::move(sensor_read_buffer), sensor_impl->GetClient());
69 }
70
71 } // namespace device
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