├── .DS_Store ├── .gitattributes ├── GetVolumeLevelsFromeSampleBuffer.podspec ├── GetVolumeLevelsFromeSampleBuffer.xcodeproj ├── project.pbxproj ├── project.xcworkspace │ ├── contents.xcworkspacedata │ └── xcuserdata │ │ └── huyangyang.xcuserdatad │ │ └── UserInterfaceState.xcuserstate └── xcuserdata │ └── huyangyang.xcuserdatad │ └── xcschemes │ └── xcschememanagement.plist ├── GetVolumeLevelsFromeSampleBuffer ├── GetVolumeLevelsFromeSampleBuffer.h ├── Info.plist ├── SampleBufferToVolumeLevelsEngine.h └── SampleBufferToVolumeLevelsEngine.m ├── LICENSE └── README.md /.DS_Store: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/doubleYang1020/GetVolumeLevelsFromeSampleBuffer/c8e272e5017e7f06f824df0fb739266aae9e090c/.DS_Store -------------------------------------------------------------------------------- /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | -------------------------------------------------------------------------------- /GetVolumeLevelsFromeSampleBuffer.podspec: -------------------------------------------------------------------------------- 1 | 2 | Pod::Spec.new do |s| 3 | s.name = 'GetVolumeLevelsFromeSampleBuffer' 4 | s.version = '1.0.7' 5 | s.authors = { "阳眼的熊" => "237505990@qq.com" } 6 | s.homepage = 'https://github.com/doubleYang1020/GetVolumeLevelsFromeSampleBuffer' 7 | s.summary = 'this is get volumeLevels from sampleBuffer engine' 8 | s.source = { :git => 'https://github.com/doubleYang1020/GetVolumeLevelsFromeSampleBuffer',:tag => s.version.to_s } 9 | s.license = { :type => "MIT", :file => "LICENSE" } 10 | 11 | s.platform = :ios, '8.0' 12 | s.requires_arc = true 13 | s.source_files = 'GetVolumeLevelsFromeSampleBuffer' 14 | s.public_header_files = 'GetVolumeLevelsFromeSampleBuffer/*.h' 15 | 16 | s.ios.deployment_target = '8.0' 17 | s.frameworks = 'AVFoundation' 18 | end 19 | 20 | 21 | -------------------------------------------------------------------------------- /GetVolumeLevelsFromeSampleBuffer.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 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All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | //! Project version number for GetVolumeLevelsFromeSampleBuffer. 12 | FOUNDATION_EXPORT double GetVolumeLevelsFromeSampleBufferVersionNumber; 13 | 14 | //! Project version string for GetVolumeLevelsFromeSampleBuffer. 15 | FOUNDATION_EXPORT const unsigned char GetVolumeLevelsFromeSampleBufferVersionString[]; 16 | 17 | // In this header, you should import all the public headers of your framework using statements like #import 18 | 19 | 20 | -------------------------------------------------------------------------------- /GetVolumeLevelsFromeSampleBuffer/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | FMWK 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleVersion 20 | $(CURRENT_PROJECT_VERSION) 21 | NSPrincipalClass 22 | 23 | 24 | 25 | -------------------------------------------------------------------------------- /GetVolumeLevelsFromeSampleBuffer/SampleBufferToVolumeLevelsEngine.h: -------------------------------------------------------------------------------- 1 | // 2 | // SampleBufferToVolumeLevelsEngine.h 3 | // GetVolumeLevelsFromeSampleBuffer 4 | // 5 | // Created by huyangyang on 2017/12/8. 6 | // Copyright © 2017年 HuYangYang.com. All rights reserved. 7 | // 8 | 9 | #import 10 | #import 11 | @interface SampleBufferToVolumeLevelsEngine : NSObject 12 | +(float)getVolumeLevelsFromeSampleBuffer:(CMSampleBufferRef)sampleBuffer; 13 | @end 14 | -------------------------------------------------------------------------------- /GetVolumeLevelsFromeSampleBuffer/SampleBufferToVolumeLevelsEngine.m: -------------------------------------------------------------------------------- 1 | // 2 | // SampleBufferToVolumeLevelsEngine.m 3 | // GetVolumeLevelsFromeSampleBuffer 4 | // 5 | // Created by huyangyang on 2017/12/8. 6 | // Copyright © 2017年 HuYangYang.com. All rights reserved. 7 | // 8 | 9 | #import "SampleBufferToVolumeLevelsEngine.h" 10 | @implementation SampleBufferToVolumeLevelsEngine 11 | 12 | +(float)getVolumeLevelsFromeSampleBuffer:(CMSampleBufferRef)sampleBuffer{ 13 | CMFormatDescriptionRef formatDescription = CMSampleBufferGetFormatDescription(sampleBuffer); 14 | const AudioStreamBasicDescription asbd = *CMAudioFormatDescriptionGetStreamBasicDescription(formatDescription); 15 | 16 | AudioBufferList bufferList; 17 | int listSize = sizeof(bufferList); 18 | CMBlockBufferRef blockBuffer; 19 | OSStatus result; 20 | result = CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer(sampleBuffer, nil, &bufferList, listSize, nil, nil, kCMSampleBufferFlag_AudioBufferList_Assure16ByteAlignment, &blockBuffer); 21 | 22 | float avgLevel = 0.0; 23 | if (result == 0) { 24 | AudioBuffer audioBuffer = bufferList.mBuffers[0]; 25 | if (asbd.mFormatFlags & kAudioFormatFlagIsFloat) { // float 26 | 27 | float* x = (float*) audioBuffer.mData; 28 | float sum = 0; 29 | int count = audioBuffer.mDataByteSize / sizeof(float); 30 | for (long i = 0; i < count; i ++) { 31 | sum += (*x) * (*x); 32 | x++; 33 | } 34 | 35 | avgLevel = sqrtf(sum / count); 36 | 37 | } 38 | else { 39 | assert(asbd.mFormatFlags & kLinearPCMFormatFlagIsSignedInteger); // signed int 40 | Byte *frame = (Byte *)audioBuffer.mData; 41 | float sum = 0; 42 | int d = audioBuffer.mDataByteSize/2; 43 | for (long i = 0; i < d; i++) { 44 | long x1, x2; 45 | if (asbd.mFormatFlags & kAudioFormatFlagIsPacked) { 46 | x1 = frame[i * 2 + 1] << 8; 47 | x2 = frame[i * 2]; 48 | } 49 | else { 50 | x1 = frame[i * 2 + 1]; 51 | x2 = frame[i * 2] << 8; 52 | } 53 | short int w = x1 | x2; 54 | 55 | sum += w*w; 56 | } 57 | 58 | avgLevel = sqrtf(sum/d); 59 | } 60 | 61 | } 62 | 63 | CFRelease(blockBuffer); 64 | 65 | return avgLevel; 66 | } 67 | @end 68 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2017 阳眼的熊 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # GetVolumeLevelsFromeSampleBuffer 2 | 3 | * An easy way to get volumeLevels frome sampleBuffer 4 | * use Objective-C 5 | 6 | ### How to use GetVolumeLevelsFromeSampleBuffer 7 | 8 | * Installation with CocoaPods：```pod 'GetVolumeLevelsFromeSampleBuffer'``` 9 | * Manual import：```#import "SampleBufferToVolumeLevelsEngine.h"``` 10 | * ```float volume = [SampleBufferToVolumeLevelsEngine getVolumeLevelsFromeSampleBuffer:buffer];``` 11 | 12 | 13 | ### Contact information： 14 | * weibo: [阳眼的熊1993](https://weibo.com/u/5696616175) 15 | * email: [hu-yangyang@qq.com](mailto:hu-yangyang@qq.com) 16 | --------------------------------------------------------------------------------