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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 #ifndef AAC_ENCODER_H
     18 #define AAC_ENCODER_H
     19 
     20 #include <media/stagefright/MediaSource.h>
     21 #include <media/stagefright/MetaData.h>
     22 
     23 struct VO_AUDIO_CODECAPI;
     24 struct VO_MEM_OPERATOR;
     25 
     26 namespace android {
     27 
     28 struct MediaBufferGroup;
     29 
     30 class AACEncoder: public MediaSource {
     31     public:
     32         AACEncoder(const sp<MediaSource> &source, const sp<MetaData> &meta);
     33 
     34         virtual status_t start(MetaData *params);
     35         virtual status_t stop();
     36         virtual sp<MetaData> getFormat();
     37         virtual status_t read(
     38                 MediaBuffer **buffer, const ReadOptions *options);
     39 
     40 
     41     protected:
     42         virtual ~AACEncoder();
     43 
     44     private:
     45         sp<MediaSource>   mSource;
     46         sp<MetaData>      mMeta;
     47         bool              mStarted;
     48         MediaBufferGroup *mBufferGroup;
     49         MediaBuffer      *mInputBuffer;
     50         status_t          mInitCheck;
     51         int32_t           mSampleRate;
     52         int32_t           mChannels;
     53         int32_t           mBitRate;
     54         int32_t           mFrameCount;
     55 
     56         int64_t           mAnchorTimeUs;
     57         int64_t           mNumInputSamples;
     58 
     59         enum {
     60             kNumSamplesPerFrame = 1024,
     61         };
     62 
     63         int16_t           *mInputFrame;
     64 
     65         uint8_t           mAudioSpecificConfigData[2]; // auido specific data
     66         void             *mEncoderHandle;
     67         VO_AUDIO_CODECAPI *mApiHandle;
     68         VO_MEM_OPERATOR  *mMemOperator;
     69 
     70         status_t setAudioSpecificConfigData();
     71         status_t initCheck();
     72 
     73         AACEncoder& operator=(const AACEncoder &rhs);
     74         AACEncoder(const AACEncoder& copy);
     75 
     76 };
     77 
     78 }
     79 
     80 #endif  //#ifndef AAC_ENCODER_H
     81 
     82