Vehicle-cpp/ZJ_PRO/webrtcinterop/include/Argus/Ext/BlockingSessionCameraProvider.h

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/**
 * @file
 * <b>Libargus Extension: Blocking Session Capture Provider API</b>
 *
 * @b Description: This file defines the BlockingSessionCaptureProvider extension.
 */

#ifndef _ARGUS_BLOCKING_SESSION_CAMERA_PROVIDER_H
#define _ARGUS_BLOCKING_SESSION_CAMERA_PROVIDER_H

namespace Argus
{

/**
 * Adds a interface to camera provider to create a blocking capture session.
 * It introduces two new interface:
 *   - Ext::IBlockingSessionCameraProvider: creates blocking capture session.
 *
 * @defgroup ArgusExtBlockingSessionCameraProvider Ext::BlockingSessionCameraProvider
 * @ingroup ArgusExtensions
 */
DEFINE_UUID(ExtensionName, EXT_BLOCKING_SESSION_CAMERA_PROVIDER, 1fff5f04,2ea9,4558,8e92,c2,4b,0b,82,b9,af);


namespace Ext
{

/**
 * @class IBlockingSessionCameraProvider
 *
 * Interface used to create blocking capture session
 *
 * @ingroup ArgusCameraProvider ArgusExtBlockingSessionCameraProvider
 */
DEFINE_UUID(InterfaceID, IID_BLOCKING_SESSION_CAMERA_PROVIDER, 3122fe85,b4cc,4945,af5d,a3,86,26,75,eb,a4);
class IBlockingSessionCameraProvider : public Interface
{
public:
    static const InterfaceID& id() { return IID_BLOCKING_SESSION_CAMERA_PROVIDER; }

    /**
     * Creates and returns a blocking CaptureSession using the given device.
     * For blocking CaptureSession, the capture related API call will block wait until the request
     * is serviced by underlying driver. This will help timing control in client side
     * when client auto control is involved.
     * In compare, for the default CaptureSession, the capture related API call will put
     * the request in a internal queue and return immediately, without blocking client thread.
     * STATUS_UNAVAILABLE will be placed into @c status if the device is already in use.
     * @param[in] device The device to use for the CaptureSession.
     * @param[out] status Optional pointer to return success/status of the call.
     * @returns The new CaptureSession, or NULL if an error occurred.
     */
    virtual CaptureSession* createBlockingCaptureSession(CameraDevice* device,
                                                         Status* status = NULL) = 0;

    /**
     * Creates and returns a blocking CaptureSession using the given device.
     * For blocking CaptureSession, the capture related API call will block wait until the request
     * is serviced by underlying driver. This will help timing control in client side
     * when client auto control is involved.
     * STATUS_UNAVAILABLE will be placed into @c status if any of the devices are already in use.
     * @param[in] devices The device(s) to use for the CaptureSession.
     * @param[out] status Optional pointer to return success/status of the call.
     * @returns The new CaptureSession, or NULL if an error occurred.
     */
    virtual CaptureSession* createBlockingCaptureSession(const std::vector<CameraDevice*>& devices,
                                                         Status* status = NULL) = 0;

protected:
    ~IBlockingSessionCameraProvider() {}
};

} // namespace Ext

} // namespace Argus

#endif