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 #ifndef VE_BACKGROUND_AUDIO_PROC_H 18 #define VE_BACKGROUND_AUDIO_PROC_H 19 20 #include "M4OSA_Error.h" 21 #include "M4OSA_Types.h" 22 #include "M4OSA_Memory.h" 23 #include "M4OSA_Export.h" 24 #include "M4OSA_CoreID.h" 25 26 27 namespace android { 28 29 typedef struct { 30 M4OSA_UInt16* m_dataAddress; // Android SRC needs a Int16 pointer 31 M4OSA_UInt32 m_bufferSize; 32 } M4AM_Buffer16; // Structure contains Int16_t pointer 33 34 enum AudioFormat { 35 MONO_16_BIT, 36 STEREO_16_BIT 37 }; 38 39 // Following struct will be used by app to supply the PT and BT properties 40 // along with ducking values 41 typedef struct { 42 M4OSA_Int32 lvInSampleRate; // Sampling audio freq (8000,16000 or more ) 43 M4OSA_Int32 lvOutSampleRate; //Sampling audio freq (8000,16000 or more ) 44 AudioFormat lvBTFormat; 45 46 M4OSA_Int32 lvInDucking_threshold; 47 M4OSA_Float lvInDucking_lowVolume; 48 M4OSA_Bool lvInDucking_enable; 49 M4OSA_Float lvPTVolLevel; 50 M4OSA_Float lvBTVolLevel; 51 M4OSA_Int32 lvBTChannelCount; 52 M4OSA_Int32 lvPTChannelCount; 53 } AudioMixSettings; 54 55 // This class is defined to get SF SRC access 56 class VideoEditorBGAudioProcessing { 57 public: 58 VideoEditorBGAudioProcessing(); ~VideoEditorBGAudioProcessing()59 ~VideoEditorBGAudioProcessing() {} 60 61 void setMixParams(const AudioMixSettings& params); 62 63 M4OSA_Int32 mixAndDuck( 64 void* primaryTrackBuffer, 65 void* backgroundTrackBuffer, 66 void* mixedOutputBuffer); 67 68 private: 69 enum { 70 kProcessingWindowSize = 10, 71 }; 72 73 M4OSA_Int32 mInSampleRate; 74 M4OSA_Int32 mOutSampleRate; 75 AudioFormat mBTFormat; 76 77 M4OSA_Bool mIsSSRCneeded; 78 M4OSA_Int32 mBTChannelCount; 79 M4OSA_Int32 mPTChannelCount; 80 M4OSA_UInt8 mChannelConversion; 81 82 M4OSA_UInt32 mDucking_threshold; 83 M4OSA_Float mDucking_lowVolume; 84 M4OSA_Float mDuckingFactor ; 85 M4OSA_Bool mDucking_enable; 86 M4OSA_Int32 mAudioVolumeArray[kProcessingWindowSize]; 87 M4OSA_Int32 mAudVolArrIndex; 88 M4OSA_Bool mDoDucking; 89 M4OSA_Float mPTVolLevel; 90 M4OSA_Float mBTVolLevel; 91 92 M4AM_Buffer16 mBTBuffer; 93 94 M4OSA_Int32 getDecibelSound(M4OSA_UInt32 value); 95 M4OSA_Bool isThresholdBreached(M4OSA_Int32* averageValue, 96 M4OSA_Int32 storeCount, M4OSA_Int32 thresholdValue); 97 98 // This returns the size of buffer which needs to allocated 99 // before resampling is called 100 M4OSA_Int32 calculateOutResampleBufSize(); 101 102 // Don't call me. 103 VideoEditorBGAudioProcessing(const VideoEditorBGAudioProcessing&); 104 VideoEditorBGAudioProcessing& operator=( 105 const VideoEditorBGAudioProcessing&); 106 }; 107 108 } // namespace android 109 110 #endif // VE_BACKGROUND_AUDIO_PROC_H 111