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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       mRangeOffset(0),
     29       mInt32Data(0),
     30       mOwnsData(true) {
     31     mData = malloc(capacity);
     32     if (mData == NULL) {
     33         mCapacity = 0;
     34         mRangeLength = 0;
     35     } else {
     36         mCapacity = capacity;
     37         mRangeLength = capacity;
     38     }
     39 }
     40 
     41 ABuffer::ABuffer(void *data, size_t capacity)
     42     : mMediaBufferBase(NULL),
     43       mData(data),
     44       mCapacity(capacity),
     45       mRangeOffset(0),
     46       mRangeLength(capacity),
     47       mInt32Data(0),
     48       mOwnsData(false) {
     49 }
     50 
     51 // static
     52 sp<ABuffer> ABuffer::CreateAsCopy(const void *data, size_t capacity)
     53 {
     54     sp<ABuffer> res = new ABuffer(capacity);
     55     if (res->base() == NULL) {
     56         return NULL;
     57     }
     58     memcpy(res->data(), data, capacity);
     59     return res;
     60 }
     61 
     62 ABuffer::~ABuffer() {
     63     if (mOwnsData) {
     64         if (mData != NULL) {
     65             free(mData);
     66             mData = NULL;
     67         }
     68     }
     69 
     70     setMediaBufferBase(NULL);
     71 }
     72 
     73 void ABuffer::setRange(size_t offset, size_t size) {
     74     CHECK_LE(offset, mCapacity);
     75     CHECK_LE(offset + size, mCapacity);
     76 
     77     mRangeOffset = offset;
     78     mRangeLength = size;
     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