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      1 /*
      2  * Copyright (C) 2010 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 #include "ABuffer.h"
     18 
     19 #include "ADebug.h"
     20 #include "ALooper.h"
     21 #include "AMessage.h"
     22 #include "MediaBufferBase.h"
     23 
     24 namespace android {
     25 
     26 ABuffer::ABuffer(size_t capacity)
     27     : mMediaBufferBase(NULL),
     28       mData(malloc(capacity)),
     29       mCapacity(capacity),
     30       mRangeOffset(0),
     31       mRangeLength(capacity),
     32       mInt32Data(0),
     33       mOwnsData(true) {
     34 }
     35 
     36 ABuffer::ABuffer(void *data, size_t capacity)
     37     : mMediaBufferBase(NULL),
     38       mData(data),
     39       mCapacity(capacity),
     40       mRangeOffset(0),
     41       mRangeLength(capacity),
     42       mInt32Data(0),
     43       mOwnsData(false) {
     44 }
     45 
     46 // static
     47 sp<ABuffer> ABuffer::CreateAsCopy(const void *data, size_t capacity)
     48 {
     49     sp<ABuffer> res = new ABuffer(capacity);
     50     memcpy(res->data(), data, capacity);
     51     return res;
     52 }
     53 
     54 ABuffer::~ABuffer() {
     55     if (mOwnsData) {
     56         if (mData != NULL) {
     57             free(mData);
     58             mData = NULL;
     59         }
     60     }
     61 
     62     if (mFarewell != NULL) {
     63         mFarewell->post();
     64     }
     65 
     66     setMediaBufferBase(NULL);
     67 }
     68 
     69 void ABuffer::setRange(size_t offset, size_t size) {
     70     CHECK_LE(offset, mCapacity);
     71     CHECK_LE(offset + size, mCapacity);
     72 
     73     mRangeOffset = offset;
     74     mRangeLength = size;
     75 }
     76 
     77 void ABuffer::setFarewellMessage(const sp<AMessage> msg) {
     78     mFarewell = msg;
     79 }
     80 
     81 sp<AMessage> ABuffer::meta() {
     82     if (mMeta == NULL) {
     83         mMeta = new AMessage;
     84     }
     85     return mMeta;
     86 }
     87 
     88 MediaBufferBase *ABuffer::getMediaBufferBase() {
     89     if (mMediaBufferBase != NULL) {
     90         mMediaBufferBase->add_ref();
     91     }
     92     return mMediaBufferBase;
     93 }
     94 
     95 void ABuffer::setMediaBufferBase(MediaBufferBase *mediaBuffer) {
     96     if (mMediaBufferBase != NULL) {
     97         mMediaBufferBase->release();
     98     }
     99     mMediaBufferBase = mediaBuffer;
    100 }
    101 
    102 }  // namespace android
    103 
    104