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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_SERVERS_CAMERA3_INPUT_STREAM_H
     18 #define ANDROID_SERVERS_CAMERA3_INPUT_STREAM_H
     19 
     20 #include <utils/RefBase.h>
     21 #include <gui/Surface.h>
     22 #include <gui/BufferItemConsumer.h>
     23 
     24 #include "Camera3IOStreamBase.h"
     25 
     26 namespace android {
     27 
     28 namespace camera3 {
     29 
     30 /**
     31  * A class for managing a single stream of input data to the camera device.
     32  *
     33  * This class serves as a consumer adapter for the HAL, and will consume the
     34  * buffers by feeding them into the HAL, as well as releasing the buffers back
     35  * the buffers once the HAL is done with them.
     36  */
     37 class Camera3InputStream : public Camera3IOStreamBase {
     38   public:
     39     /**
     40      * Set up a stream for formats that have fixed size, such as RAW and YUV.
     41      */
     42     Camera3InputStream(int id, uint32_t width, uint32_t height, int format);
     43     ~Camera3InputStream();
     44 
     45     virtual void     dump(int fd, const Vector<String16> &args) const;
     46 
     47     /**
     48      * Get the producer interface for this stream, to hand off to a producer.
     49      * The producer must be connected to the provided interface before
     50      * finishConfigure is called on this stream.
     51      */
     52     sp<IGraphicBufferProducer> getProducerInterface() const;
     53 
     54   private:
     55 
     56     typedef BufferItemConsumer::BufferItem BufferItem;
     57 
     58     sp<BufferItemConsumer> mConsumer;
     59     Vector<BufferItem> mBuffersInFlight;
     60 
     61     /**
     62      * Camera3IOStreamBase
     63      */
     64     virtual status_t returnBufferCheckedLocked(
     65             const camera3_stream_buffer &buffer,
     66             nsecs_t timestamp,
     67             bool output,
     68             /*out*/
     69             sp<Fence> *releaseFenceOut);
     70 
     71     /**
     72      * Camera3Stream interface
     73      */
     74 
     75     virtual status_t getInputBufferLocked(camera3_stream_buffer *buffer);
     76     virtual status_t returnInputBufferLocked(
     77             const camera3_stream_buffer &buffer);
     78     virtual status_t disconnectLocked();
     79 
     80     virtual status_t configureQueueLocked();
     81 
     82 }; // class Camera3InputStream
     83 
     84 }; // namespace camera3
     85 
     86 }; // namespace android
     87 
     88 #endif
     89