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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/capture/video/file_video_capture_device_factory.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/strings/sys_string_conversions.h"
#include "base/threading/scoped_blocking_call.h"
#include "base/threading/thread_restrictions.h"
#include "build/build_config.h"
#include "media/base/media_switches.h"
#include "media/capture/video/file_video_capture_device.h"
namespace media {
const char kFileVideoCaptureDeviceName[] =
"/dev/placeholder-for-file-backed-fake-capture-device";
// Inspects the command line and retrieves the file path parameter.
base::FilePath GetFilePathFromCommandLine() {
base::FilePath command_line_file_path =
base::CommandLine::ForCurrentProcess()->GetSwitchValuePath(
switches::kUseFileForFakeVideoCapture);
CHECK(!command_line_file_path.empty());
return command_line_file_path;
}
std::unique_ptr<VideoCaptureDevice> FileVideoCaptureDeviceFactory::CreateDevice(
const VideoCaptureDeviceDescriptor& device_descriptor) {
DCHECK(thread_checker_.CalledOnValidThread());
base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
base::BlockingType::MAY_BLOCK);
#if defined(OS_WIN)
return std::unique_ptr<VideoCaptureDevice>(new FileVideoCaptureDevice(
base::FilePath(base::SysUTF8ToWide(device_descriptor.display_name()))));
#else
return std::unique_ptr<VideoCaptureDevice>(new FileVideoCaptureDevice(
base::FilePath(device_descriptor.display_name())));
#endif
}
void FileVideoCaptureDeviceFactory::GetDevicesInfo(
GetDevicesInfoCallback callback) {
DCHECK(thread_checker_.CalledOnValidThread());
base::ThreadRestrictions::SetIOAllowed(true);
std::vector<VideoCaptureDeviceInfo> devices_info;
auto api =
#if defined(OS_WIN)
VideoCaptureApi::WIN_DIRECT_SHOW;
#elif defined(OS_MAC)
VideoCaptureApi::MACOSX_AVFOUNDATION;
#elif defined(OS_LINUX) || defined(OS_CHROMEOS)
VideoCaptureApi::LINUX_V4L2_SINGLE_PLANE;
#else
VideoCaptureApi::UNKNOWN;
#endif
devices_info.emplace_back(
VideoCaptureDeviceDescriptor(GetFilePathFromCommandLine().AsUTF8Unsafe(),
kFileVideoCaptureDeviceName, api));
VideoCaptureFormat capture_format;
if (!FileVideoCaptureDevice::GetVideoCaptureFormat(
GetFilePathFromCommandLine(), &capture_format)) {
std::move(callback).Run({});
return;
}
devices_info.back().supported_formats.push_back(capture_format);
std::move(callback).Run(std::move(devices_info));
}
} // namespace media
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