116 lines
4.5 KiB
C
116 lines
4.5 KiB
C
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/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_VIDEO_CAPTURE_VIDEO_CAPTURE_H_
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#define MODULES_VIDEO_CAPTURE_VIDEO_CAPTURE_H_
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#include "api/video/video_rotation.h"
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#include "api/video/video_sink_interface.h"
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#include "modules/video_capture/video_capture_defines.h"
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namespace webrtc {
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class VideoCaptureModule : public rtc::RefCountInterface {
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public:
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// Interface for receiving information about available camera devices.
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class DeviceInfo {
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public:
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virtual uint32_t NumberOfDevices() = 0;
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// Returns the available capture devices.
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// deviceNumber - Index of capture device.
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// deviceNameUTF8 - Friendly name of the capture device.
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// deviceUniqueIdUTF8 - Unique name of the capture device if it exist.
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// Otherwise same as deviceNameUTF8.
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// productUniqueIdUTF8 - Unique product id if it exist.
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// Null terminated otherwise.
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virtual int32_t GetDeviceName(uint32_t deviceNumber,
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char* deviceNameUTF8,
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uint32_t deviceNameLength,
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char* deviceUniqueIdUTF8,
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uint32_t deviceUniqueIdUTF8Length,
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char* productUniqueIdUTF8 = 0,
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uint32_t productUniqueIdUTF8Length = 0) = 0;
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// Returns the number of capabilities this device.
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virtual int32_t NumberOfCapabilities(const char* deviceUniqueIdUTF8) = 0;
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// Gets the capabilities of the named device.
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virtual int32_t GetCapability(const char* deviceUniqueIdUTF8,
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const uint32_t deviceCapabilityNumber,
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VideoCaptureCapability& capability) = 0;
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// Gets clockwise angle the captured frames should be rotated in order
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// to be displayed correctly on a normally rotated display.
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virtual int32_t GetOrientation(const char* deviceUniqueIdUTF8,
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VideoRotation& orientation) = 0;
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// Gets the capability that best matches the requested width, height and
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// frame rate.
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// Returns the deviceCapabilityNumber on success.
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virtual int32_t GetBestMatchedCapability(
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const char* deviceUniqueIdUTF8,
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const VideoCaptureCapability& requested,
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VideoCaptureCapability& resulting) = 0;
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// Display OS /capture device specific settings dialog
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virtual int32_t DisplayCaptureSettingsDialogBox(
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const char* deviceUniqueIdUTF8,
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const char* dialogTitleUTF8,
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void* parentWindow,
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uint32_t positionX,
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uint32_t positionY) = 0;
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virtual ~DeviceInfo() {}
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};
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// Register capture data callback
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virtual void RegisterCaptureDataCallback(
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rtc::VideoSinkInterface<VideoFrame>* dataCallback) = 0;
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// Remove capture data callback
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virtual void DeRegisterCaptureDataCallback() = 0;
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// Start capture device
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virtual int32_t StartCapture(const VideoCaptureCapability& capability) = 0;
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virtual int32_t StopCapture() = 0;
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// Returns the name of the device used by this module.
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virtual const char* CurrentDeviceName() const = 0;
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// Returns true if the capture device is running
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virtual bool CaptureStarted() = 0;
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// Gets the current configuration.
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virtual int32_t CaptureSettings(VideoCaptureCapability& settings) = 0;
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// Set the rotation of the captured frames.
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// If the rotation is set to the same as returned by
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// DeviceInfo::GetOrientation the captured frames are
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// displayed correctly if rendered.
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virtual int32_t SetCaptureRotation(VideoRotation rotation) = 0;
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// Tells the capture module whether to apply the pending rotation. By default,
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// the rotation is applied and the generated frame is up right. When set to
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// false, generated frames will carry the rotation information from
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// SetCaptureRotation. Return value indicates whether this operation succeeds.
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virtual bool SetApplyRotation(bool enable) = 0;
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// Return whether the rotation is applied or left pending.
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virtual bool GetApplyRotation() = 0;
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protected:
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~VideoCaptureModule() override {}
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};
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} // namespace webrtc
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#endif // MODULES_VIDEO_CAPTURE_VIDEO_CAPTURE_H_
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