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// Copyright (c) 2012 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.
// Implementation of a fake VideoCaptureDevice class. Used for testing other
// video capture classes when no real hardware is available.
#ifndef MEDIA_VIDEO_CAPTURE_FAKE_VIDEO_CAPTURE_DEVICE_H_
#define MEDIA_VIDEO_CAPTURE_FAKE_VIDEO_CAPTURE_DEVICE_H_
#include <string>
#include "base/memory/scoped_ptr.h"
#include "base/threading/thread.h"
#include "media/video/capture/video_capture_device.h"
namespace media {
class MEDIA_EXPORT FakeVideoCaptureDevice : public VideoCaptureDevice {
public:
static VideoCaptureDevice* Create(const Name& device_name);
virtual ~FakeVideoCaptureDevice();
// Used for testing. This will make sure the next call to Create will
// return NULL;
static void SetFailNextCreate();
static void GetDeviceNames(Names* device_names);
static void GetDeviceSupportedFormats(const Name& device,
VideoCaptureCapabilities* formats);
// VideoCaptureDevice implementation.
virtual void AllocateAndStart(
const VideoCaptureCapability& capture_format,
scoped_ptr<VideoCaptureDevice::Client> client) OVERRIDE;
virtual void StopAndDeAllocate() OVERRIDE;
private:
// Flag indicating the internal state.
enum InternalState {
kIdle,
kCapturing,
kError
};
FakeVideoCaptureDevice();
// Called on the capture_thread_.
void OnCaptureTask();
// EXPERIMENTAL, similar to allocate, but changes resolution and calls
// client->OnFrameInfoChanged(VideoCaptureCapability&)
void Reallocate();
void PopulateCapabilitiesRoster();
scoped_ptr<VideoCaptureDevice::Client> client_;
InternalState state_;
base::Thread capture_thread_;
scoped_ptr<uint8[]> fake_frame_;
int frame_count_;
VideoCaptureCapability capture_format_;
// When the device is configured as mutating video captures, this vector
// holds the available ones which are used in sequence, restarting at the end.
std::vector<VideoCaptureCapability> capabilities_roster_;
int capabilities_roster_index_;
static bool fail_next_create_;
DISALLOW_COPY_AND_ASSIGN(FakeVideoCaptureDevice);
};
} // namespace media
#endif // MEDIA_VIDEO_CAPTURE_FAKE_VIDEO_CAPTURE_DEVICE_H_
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