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      1 /*
      2  * Copyright (C) 2009 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 CAMERA_SOURCE_H_
     18 
     19 #define CAMERA_SOURCE_H_
     20 
     21 #include <media/stagefright/MediaBuffer.h>
     22 #include <media/stagefright/MediaSource.h>
     23 #include <utils/List.h>
     24 #include <utils/RefBase.h>
     25 #include <utils/threads.h>
     26 
     27 namespace android {
     28 
     29 class ICamera;
     30 class IMemory;
     31 class ISurface;
     32 class Camera;
     33 
     34 class CameraSource : public MediaSource {
     35 public:
     36     static CameraSource *Create();
     37     static CameraSource *CreateFromICamera(const sp<ICamera> &icamera);
     38 
     39     virtual ~CameraSource();
     40 
     41     void setPreviewSurface(const sp<ISurface> &surface);
     42 
     43     virtual status_t start(MetaData *params = NULL);
     44     virtual status_t stop();
     45 
     46     virtual sp<MetaData> getFormat();
     47 
     48     virtual status_t read(
     49             MediaBuffer **buffer, const ReadOptions *options = NULL);
     50 
     51 private:
     52     friend class CameraSourceListener;
     53 
     54     sp<Camera> mCamera;
     55     sp<ISurface> mPreviewSurface;
     56 
     57     Mutex mLock;
     58     Condition mFrameAvailableCondition;
     59     List<sp<IMemory> > mFrames;
     60     List<int64_t> mFrameTimes;
     61 
     62     int mWidth, mHeight;
     63     int64_t mFirstFrameTimeUs;
     64     int32_t mNumFrames;
     65     bool mStarted;
     66 
     67     CameraSource(const sp<Camera> &camera);
     68 
     69     void dataCallback(int32_t msgType, const sp<IMemory> &data);
     70 
     71     CameraSource(const CameraSource &);
     72     CameraSource &operator=(const CameraSource &);
     73 };
     74 
     75 }  // namespace android
     76 
     77 #endif  // CAMERA_SOURCE_H_
     78