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      1 /*
      2 ** Copyright (c) 2011-2012 The Linux Foundation. All rights reserved.
      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 
     18 #ifndef __QCAMERAHWI_MEM_H
     19 #define __QCAMERAHWI_MEM_H
     20 
     21 #include <binder/MemoryBase.h>
     22 #include <binder/MemoryHeapBase.h>
     23 #include <utils/threads.h>
     24 #include <stdint.h>
     25 #include "QCamera_Intf.h"
     26 
     27 extern "C" {
     28 #include <linux/msm_ion.h>
     29 }
     30 
     31 
     32 #define VIDEO_BUFFER_COUNT 5
     33 #define VIDEO_BUFFER_COUNT_LOW_POWER_CAMCORDER 9
     34 
     35 #define PREVIEW_BUFFER_COUNT 5
     36 
     37 namespace android {
     38 
     39 // This class represents a heap which maintains several contiguous
     40 // buffers.  The heap may be backed by pmem (when pmem_pool contains
     41 // the name of a /dev/pmem* file), or by ashmem (when pmem_pool == NULL).
     42 
     43 struct MemPool : public RefBase {
     44     MemPool(int buffer_size, int num_buffers,
     45             int frame_size,
     46             const char *name);
     47 
     48     virtual ~MemPool() = 0;
     49 
     50     void completeInitialization();
     51     bool initialized() const {
     52         return mHeap != NULL && mHeap->base() != MAP_FAILED;
     53     }
     54 
     55     virtual status_t dump(int fd, const Vector<String16>& args) const;
     56 
     57     int mBufferSize;
     58     int mAlignedBufferSize;
     59     int mNumBuffers;
     60     int mFrameSize;
     61     sp<MemoryHeapBase> mHeap;
     62     sp<MemoryBase> *mBuffers;
     63 
     64     const char *mName;
     65 };
     66 
     67 class AshmemPool : public MemPool {
     68 public:
     69     AshmemPool(int buffer_size, int num_buffers,
     70                int frame_size,
     71                const char *name);
     72 };
     73 
     74 class PmemPool : public MemPool {
     75 public:
     76     PmemPool(const char *pmem_pool,
     77              int flags, int pmem_type,
     78              int buffer_size, int num_buffers,
     79              int frame_size, int cbcr_offset,
     80              int yoffset, const char *name);
     81     virtual ~PmemPool();
     82     int mFd;
     83     int mPmemType;
     84     int mCbCrOffset;
     85     int myOffset;
     86     int mCameraControlFd;
     87     uint32_t mAlignedSize;
     88 };
     89 
     90 class IonPool : public MemPool {
     91 public:
     92     IonPool( int flags,
     93              int buffer_size, int num_buffers,
     94              int frame_size, int cbcr_offset,
     95              int yoffset, const char *name);
     96     virtual ~IonPool();
     97     int mFd;
     98     int mCbCrOffset;
     99     int myOffset;
    100     int mCameraControlFd;
    101     uint32_t mAlignedSize;
    102 private:
    103     static const char mIonDevName[];
    104 };
    105 
    106 };
    107 #endif
    108