/* * Copyright (C) 2013 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef ANDROID_SERVERS_CAMERA_CAMERADEVICEBASE_H #define ANDROID_SERVERS_CAMERA_CAMERADEVICEBASE_H #include #include #include #include #include #include #include #include "hardware/camera2.h" #include "camera/CameraMetadata.h" #include "camera/CaptureResult.h" namespace android { /** * Base interface for version >= 2 camera device classes, which interface to * camera HAL device versions >= 2. */ class CameraDeviceBase : public virtual RefBase { public: virtual ~CameraDeviceBase(); /** * The device's camera ID */ virtual int getId() const = 0; virtual status_t initialize(camera_module_t *module) = 0; virtual status_t disconnect() = 0; virtual status_t dump(int fd, const Vector &args) = 0; /** * The device's static characteristics metadata buffer */ virtual const CameraMetadata& info() const = 0; /** * Submit request for capture. The CameraDevice takes ownership of the * passed-in buffer. * Output lastFrameNumber is the expected frame number of this request. */ virtual status_t capture(CameraMetadata &request, int64_t *lastFrameNumber = NULL) = 0; /** * Submit a list of requests. * Output lastFrameNumber is the expected last frame number of the list of requests. */ virtual status_t captureList(const List &requests, int64_t *lastFrameNumber = NULL) = 0; /** * Submit request for streaming. The CameraDevice makes a copy of the * passed-in buffer and the caller retains ownership. * Output lastFrameNumber is the last frame number of the previous streaming request. */ virtual status_t setStreamingRequest(const CameraMetadata &request, int64_t *lastFrameNumber = NULL) = 0; /** * Submit a list of requests for streaming. * Output lastFrameNumber is the last frame number of the previous streaming request. */ virtual status_t setStreamingRequestList(const List &requests, int64_t *lastFrameNumber = NULL) = 0; /** * Clear the streaming request slot. * Output lastFrameNumber is the last frame number of the previous streaming request. */ virtual status_t clearStreamingRequest(int64_t *lastFrameNumber = NULL) = 0; /** * Wait until a request with the given ID has been dequeued by the * HAL. Returns TIMED_OUT if the timeout duration is reached. Returns * immediately if the latest request received by the HAL has this id. */ virtual status_t waitUntilRequestReceived(int32_t requestId, nsecs_t timeout) = 0; /** * Create an output stream of the requested size and format. * * If format is CAMERA2_HAL_PIXEL_FORMAT_OPAQUE, then the HAL device selects * an appropriate format; it can be queried with getStreamInfo. * * If format is HAL_PIXEL_FORMAT_COMPRESSED, the size parameter must be * equal to the size in bytes of the buffers to allocate for the stream. For * other formats, the size parameter is ignored. */ virtual status_t createStream(sp consumer, uint32_t width, uint32_t height, int format, size_t size, int *id) = 0; /** * Create an input reprocess stream that uses buffers from an existing * output stream. */ virtual status_t createReprocessStreamFromStream(int outputId, int *id) = 0; /** * Get information about a given stream. */ virtual status_t getStreamInfo(int id, uint32_t *width, uint32_t *height, uint32_t *format) = 0; /** * Set stream gralloc buffer transform */ virtual status_t setStreamTransform(int id, int transform) = 0; /** * Delete stream. Must not be called if there are requests in flight which * reference that stream. */ virtual status_t deleteStream(int id) = 0; /** * Delete reprocess stream. Must not be called if there are requests in * flight which reference that stream. */ virtual status_t deleteReprocessStream(int id) = 0; /** * Create a metadata buffer with fields that the HAL device believes are * best for the given use case */ virtual status_t createDefaultRequest(int templateId, CameraMetadata *request) = 0; /** * Wait until all requests have been processed. Returns INVALID_OPERATION if * the streaming slot is not empty, or TIMED_OUT if the requests haven't * finished processing in 10 seconds. */ virtual status_t waitUntilDrained() = 0; /** * Abstract class for HAL notification listeners */ class NotificationListener { public: // The set of notifications is a merge of the notifications required for // API1 and API2. // Required for API 1 and 2 virtual void notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode, const CaptureResultExtras &resultExtras) = 0; // Required only for API2 virtual void notifyIdle() = 0; virtual void notifyShutter(const CaptureResultExtras &resultExtras, nsecs_t timestamp) = 0; // Required only for API1 virtual void notifyAutoFocus(uint8_t newState, int triggerId) = 0; virtual void notifyAutoExposure(uint8_t newState, int triggerId) = 0; virtual void notifyAutoWhitebalance(uint8_t newState, int triggerId) = 0; protected: virtual ~NotificationListener(); }; /** * Connect HAL notifications to a listener. Overwrites previous * listener. Set to NULL to stop receiving notifications. */ virtual status_t setNotifyCallback(NotificationListener *listener) = 0; /** * Whether the device supports calling notifyAutofocus, notifyAutoExposure, * and notifyAutoWhitebalance; if this returns false, the client must * synthesize these notifications from received frame metadata. */ virtual bool willNotify3A() = 0; /** * Wait for a new frame to be produced, with timeout in nanoseconds. * Returns TIMED_OUT when no frame produced within the specified duration * May be called concurrently to most methods, except for getNextFrame */ virtual status_t waitForNextFrame(nsecs_t timeout) = 0; /** * Get next capture result frame from the result queue. Returns NOT_ENOUGH_DATA * if the queue is empty; caller takes ownership of the metadata buffer inside * the capture result object's metadata field. * May be called concurrently to most methods, except for waitForNextFrame. */ virtual status_t getNextResult(CaptureResult *frame) = 0; /** * Trigger auto-focus. The latest ID used in a trigger autofocus or cancel * autofocus call will be returned by the HAL in all subsequent AF * notifications. */ virtual status_t triggerAutofocus(uint32_t id) = 0; /** * Cancel auto-focus. The latest ID used in a trigger autofocus/cancel * autofocus call will be returned by the HAL in all subsequent AF * notifications. */ virtual status_t triggerCancelAutofocus(uint32_t id) = 0; /** * Trigger pre-capture metering. The latest ID used in a trigger pre-capture * call will be returned by the HAL in all subsequent AE and AWB * notifications. */ virtual status_t triggerPrecaptureMetering(uint32_t id) = 0; /** * Abstract interface for clients that want to listen to reprocess buffer * release events */ struct BufferReleasedListener : public virtual RefBase { virtual void onBufferReleased(buffer_handle_t *handle) = 0; }; /** * Push a buffer to be reprocessed into a reprocessing stream, and * provide a listener to call once the buffer is returned by the HAL */ virtual status_t pushReprocessBuffer(int reprocessStreamId, buffer_handle_t *buffer, wp listener) = 0; /** * Flush all pending and in-flight requests. Blocks until flush is * complete. * Output lastFrameNumber is the last frame number of the previous streaming request. */ virtual status_t flush(int64_t *lastFrameNumber = NULL) = 0; }; }; // namespace android #endif