services/camera/libcameraservice/device3/Camera3OutputStream.h

/*
 * 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_CAMERA3_OUTPUT_STREAM_H
#define ANDROID_SERVERS_CAMERA3_OUTPUT_STREAM_H

#include <utils/RefBase.h>
#include <gui/Surface.h>

#include "Camera3Stream.h"
#include "Camera3IOStreamBase.h"
#include "Camera3OutputStreamInterface.h"

namespace android {

namespace camera3 {

/**
 * A class for managing a single stream of output data from the camera device.
 */
class Camera3OutputStream :
        public Camera3IOStreamBase,
        public Camera3OutputStreamInterface {
  public:
    /**
     * Set up a stream for formats that have 2 dimensions, such as RAW and YUV.
     */
    Camera3OutputStream(int id, sp<Surface> consumer,
            uint32_t width, uint32_t height, int format,
            android_dataspace dataSpace, camera3_stream_rotation_t rotation);

    /**
     * Set up a stream for formats that have a variable buffer size for the same
     * dimensions, such as compressed JPEG.
     */
    Camera3OutputStream(int id, sp<Surface> consumer,
            uint32_t width, uint32_t height, size_t maxSize, int format,
            android_dataspace dataSpace, camera3_stream_rotation_t rotation);

    virtual ~Camera3OutputStream();

    /**
     * Camera3Stream interface
     */

    virtual void     dump(int fd, const Vector<String16> &args) const;

    /**
     * Set the transform on the output stream; one of the
     * HAL_TRANSFORM_* / NATIVE_WINDOW_TRANSFORM_* constants.
     */
    status_t         setTransform(int transform);

    /**
     * Return if this output stream is for video encoding.
     */
    bool isVideoStream() const;

  protected:
    Camera3OutputStream(int id, camera3_stream_type_t type,
            uint32_t width, uint32_t height, int format,
            android_dataspace dataSpace, camera3_stream_rotation_t rotation);

    /**
     * Note that we release the lock briefly in this function
     */
    virtual status_t returnBufferCheckedLocked(
            const camera3_stream_buffer &buffer,
            nsecs_t timestamp,
            bool output,
            /*out*/
            sp<Fence> *releaseFenceOut);

    virtual status_t disconnectLocked();

    sp<Surface> mConsumer;
  private:
    int               mTransform;

    virtual status_t  setTransformLocked(int transform);

    bool mTraceFirstBuffer;

    // Name of Surface consumer
    String8           mConsumerName;

    /**
     * Internal Camera3Stream interface
     */
    virtual status_t getBufferLocked(camera3_stream_buffer *buffer);
    virtual status_t returnBufferLocked(
            const camera3_stream_buffer &buffer,
            nsecs_t timestamp);

    virtual status_t configureQueueLocked();

    virtual status_t getEndpointUsage(uint32_t *usage) const;

}; // class Camera3OutputStream

} // namespace camera3

} // namespace android

#endif