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      1 /*
      2  * Copyright (C) 2011 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 "M4OSA_Error.h"
     18 #include "M4OSA_Types.h"
     19 #include "M4OSA_Memory.h"
     20 #include "M4OSA_Export.h"
     21 #include "M4OSA_CoreID.h"
     22 
     23 namespace android{
     24 
     25 #define WINDOW_SIZE 10
     26 
     27 enum veAudioFormat {MONO_16_BIT, STEREO_16_BIT};
     28 
     29 
     30 typedef struct {
     31     M4OSA_UInt16*   m_dataAddress; // Android SRC needs a Int16 pointer
     32     M4OSA_UInt32    m_bufferSize;
     33 } M4AM_Buffer16;    // Structure contains Int16_t pointer
     34 
     35 // Following struct will be used by app to supply the PT and BT properties
     36 // along with ducking values
     37 typedef struct {
     38     M4OSA_Int32 lvInSampleRate; // Sampling audio freq (8000,16000 or more )
     39     M4OSA_Int32 lvOutSampleRate; //Sampling audio freq (8000,16000 or more )
     40     veAudioFormat lvBTFormat;
     41 
     42     M4OSA_Int32 lvInDucking_threshold;
     43     M4OSA_Float lvInDucking_lowVolume;
     44     M4OSA_Bool lvInDucking_enable;
     45     M4OSA_Float lvPTVolLevel;
     46     M4OSA_Float lvBTVolLevel;
     47     M4OSA_Int32 lvBTChannelCount;
     48     M4OSA_Int32 lvPTChannelCount;
     49 } veAudMixSettings;
     50 
     51 // This class is defined to get SF SRC access
     52 class VideoEditorBGAudioProcessing {
     53 public:
     54     VideoEditorBGAudioProcessing();
     55     void veSetAudioProcessingParams(const veAudMixSettings& mixParams);
     56 
     57     M4OSA_Int32 veProcessAudioMixNDuck(
     58                     void* primaryTrackBuffer,
     59                     void* backgroundTrackBuffer,
     60                     void* mixedOutputBuffer);
     61 
     62     ~VideoEditorBGAudioProcessing();
     63 
     64 private:
     65     M4OSA_Int32 mInSampleRate;
     66     M4OSA_Int32 mOutSampleRate;
     67     veAudioFormat mBTFormat;
     68 
     69     M4OSA_Bool mIsSSRCneeded;
     70     M4OSA_Int32 mBTChannelCount;
     71     M4OSA_Int32 mPTChannelCount;
     72     M4OSA_UInt8 mChannelConversion;
     73 
     74     M4OSA_UInt32 mDucking_threshold;
     75     M4OSA_Float mDucking_lowVolume;
     76     M4OSA_Float mDuckingFactor ;
     77     M4OSA_Bool mDucking_enable;
     78     M4OSA_Int32 mAudioVolumeArray[WINDOW_SIZE];
     79     M4OSA_Int32 mAudVolArrIndex;
     80     M4OSA_Bool mDoDucking;
     81     M4OSA_Float mPTVolLevel;
     82     M4OSA_Float mBTVolLevel;
     83 
     84     M4AM_Buffer16 mBTBuffer;
     85 
     86     M4OSA_Int32 getDecibelSound(M4OSA_UInt32 value);
     87     M4OSA_Bool  isThresholdBreached(M4OSA_Int32* averageValue,
     88                     M4OSA_Int32 storeCount, M4OSA_Int32 thresholdValue);
     89 
     90     // This returns the size of buffer which needs to allocated
     91     // before resampling is called
     92     M4OSA_Int32 calculateOutResampleBufSize();
     93 };
     94 } // namespace android
     95