1 // Copyright 2017 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "media/capture/video/video_capture_system_impl.h"
9 #include "base/functional/bind.h"
10 #include "base/functional/callback_helpers.h"
11 #include "base/ranges/algorithm.h"
12 #include "base/trace_event/trace_event.h"
13 #include "build/build_config.h"
14 #include "media/base/scoped_async_trace.h"
15 #include "media/capture/video/video_capture_device_factory.h"
16 #include "media/capture/video/video_capture_metrics.h"
18 using ScopedCaptureTrace =
19 media::TypedScopedAsyncTrace<media::TraceCategory::kVideoAndImageCapture>;
23 // Compares two VideoCaptureFormat by checking smallest frame_size area, then
24 // by width, and then by _largest_ frame_rate. Used to order a
25 // VideoCaptureFormats vector so that the first entry for a given resolution has
26 // the largest frame rate.
27 bool IsCaptureFormatSmaller(const media::VideoCaptureFormat& format1,
28 const media::VideoCaptureFormat& format2) {
29 DCHECK(format1.frame_size.GetCheckedArea().IsValid());
30 DCHECK(format2.frame_size.GetCheckedArea().IsValid());
31 if (format1.frame_size.GetCheckedArea().ValueOrDefault(0) ==
32 format2.frame_size.GetCheckedArea().ValueOrDefault(0)) {
33 if (format1.frame_size.width() == format2.frame_size.width()) {
34 return format1.frame_rate > format2.frame_rate;
36 return format1.frame_size.width() > format2.frame_size.width();
38 return format1.frame_size.GetCheckedArea().ValueOrDefault(0) <
39 format2.frame_size.GetCheckedArea().ValueOrDefault(0);
42 bool IsCaptureFormatEqual(const media::VideoCaptureFormat& format1,
43 const media::VideoCaptureFormat& format2) {
44 return format1.frame_size == format2.frame_size &&
45 format1.frame_rate == format2.frame_rate &&
46 format1.pixel_format == format2.pixel_format;
49 // This function receives a list of capture formats, sets all of them to I420
50 // (while keeping Y16 as is), and then removes duplicates.
51 void ConsolidateCaptureFormats(media::VideoCaptureFormats* formats) {
54 // Mark all formats as I420, since this is what the renderer side will get
55 // anyhow: the actual pixel format is decided at the device level.
56 // Don't do this for the Y16 or NV12 formats as they are handled separately.
57 for (auto& format : *formats) {
58 if (format.pixel_format != media::PIXEL_FORMAT_Y16 &&
59 #if BUILDFLAG(IS_TIZEN)
60 format.pixel_format != media::PIXEL_FORMAT_ENCODED &&
62 #if defined(TIZEN_MULTIMEDIA_MJPEG_SUPPORT)
63 format.pixel_format != media::PIXEL_FORMAT_MJPEG &&
65 format.pixel_format != media::PIXEL_FORMAT_NV12)
66 format.pixel_format = media::PIXEL_FORMAT_I420;
68 std::sort(formats->begin(), formats->end(), IsCaptureFormatSmaller);
71 std::unique(formats->begin(), formats->end(), IsCaptureFormatEqual);
72 formats->erase(last, formats->end());
75 void DeviceInfosCallbackTrampoline(
76 media::VideoCaptureSystem::DeviceInfoCallback callback,
77 std::unique_ptr<ScopedCaptureTrace> trace,
78 const std::vector<media::VideoCaptureDeviceInfo>& infos) {
79 std::move(callback).Run(infos);
82 } // anonymous namespace
86 VideoCaptureSystemImpl::VideoCaptureSystemImpl(
87 std::unique_ptr<VideoCaptureDeviceFactory> factory)
88 : factory_(std::move(factory)) {
89 thread_checker_.DetachFromThread();
92 VideoCaptureSystemImpl::~VideoCaptureSystemImpl() = default;
94 void VideoCaptureSystemImpl::GetDeviceInfosAsync(
95 DeviceInfoCallback result_callback) {
96 DCHECK(thread_checker_.CalledOnValidThread());
97 device_enum_request_queue_.push_back(base::BindOnce(
98 &DeviceInfosCallbackTrampoline, std::move(result_callback),
99 ScopedCaptureTrace::CreateIfEnabled("GetDeviceInfosAsync")));
100 if (device_enum_request_queue_.size() == 1) {
101 // base::Unretained() is safe because |factory_| is owned and it guarantees
102 // not to call the callback after destruction.
103 factory_->GetDevicesInfo(base::BindOnce(
104 &VideoCaptureSystemImpl::DevicesInfoReady, base::Unretained(this)));
108 VideoCaptureErrorOrDevice VideoCaptureSystemImpl::CreateDevice(
109 const std::string& device_id) {
110 TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("video_and_image_capture"),
111 "VideoCaptureSystemImpl::CreateDevice");
112 DCHECK(thread_checker_.CalledOnValidThread());
113 const VideoCaptureDeviceInfo* device_info = LookupDeviceInfoFromId(device_id);
115 return VideoCaptureErrorOrDevice(
116 VideoCaptureError::kVideoCaptureSystemDeviceIdNotFound);
118 return factory_->CreateDevice(device_info->descriptor);
121 const VideoCaptureDeviceInfo* VideoCaptureSystemImpl::LookupDeviceInfoFromId(
122 const std::string& device_id) {
123 DCHECK(thread_checker_.CalledOnValidThread());
124 auto iter = base::ranges::find(devices_info_cache_, device_id,
125 [](const VideoCaptureDeviceInfo& device_info) {
126 return device_info.descriptor.device_id;
128 if (iter == devices_info_cache_.end())
133 void VideoCaptureSystemImpl::DevicesInfoReady(
134 std::vector<VideoCaptureDeviceInfo> devices_info) {
135 DCHECK(thread_checker_.CalledOnValidThread());
136 DCHECK(!device_enum_request_queue_.empty());
138 // Only save metrics the first time device infos are populated.
139 if (devices_info_cache_.empty()) {
140 LogCaptureDeviceMetrics(devices_info);
143 for (auto& device_info : devices_info) {
144 ConsolidateCaptureFormats(&device_info.supported_formats);
147 devices_info_cache_ = std::move(devices_info);
149 DeviceEnumQueue requests;
150 std::swap(requests, device_enum_request_queue_);
152 auto weak_this = weak_factory_.GetWeakPtr();
153 for (auto& request : requests) {
154 std::move(request).Run(devices_info_cache_);
156 // Callbacks may destroy |this|.
162 VideoCaptureDeviceFactory* VideoCaptureSystemImpl::GetFactory() {
163 return factory_.get();