blob: 016b8e2e517931839fc9d8381431e7cb9189aad2 [file] [log] [blame]
// Copyright 2017 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/video_capture_device_factory.h"
#include "media/capture/video/video_capture_device_info.h"
namespace media {
// GetDeviceInfosAsync() should be called at least once before calling
// CreateDevice(), because otherwise CreateDevice() will allways return nullptr.
class CAPTURE_EXPORT VideoCaptureSystem {
using DeviceInfoCallback =
base::OnceCallback<void(const std::vector<VideoCaptureDeviceInfo>&)>;
virtual ~VideoCaptureSystem() {}
// The passed-in |result_callback| must have ownership of the called
// VideoCaptureSystem instance to guarantee that it stays alive during the
// asynchronous operation. |result_callback| is invoked on the same thread
// that calls GetDeviceInfosAsync()
virtual void GetDeviceInfosAsync(DeviceInfoCallback result_callback) = 0;
// Creates a VideoCaptureDevice object. Returns nullptr if something goes
// wrong.
virtual std::unique_ptr<VideoCaptureDevice> CreateDevice(
const std::string& device_id) = 0;
} // namespace media