NvsWaveformDataGenerator.h

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//================================================================================
//
// (c) Copyright China Digital Video (Beijing) Limited, 2021. All rights reserved.
//
// This code and information is provided "as is" without warranty of any kind,
// either expressed or implied, including but not limited to the implied
// warranties of merchantability and/or fitness for a particular purpose.
//
//--------------------------------------------------------------------------------
//   Birth Date:    Apr 08. 2021
//   Author:        Meishe video team
//================================================================================
#pragma once
 
#import <Foundation/Foundation.h>
#import "NvsAVFileInfo.h"
 
@protocol NvsWaveformDataGeneratorDelegate <NSObject>
@optional
 
- (void)didWaveformDataReady:(int64_t)taskId audioFilePath:(NSString*)audioFilePath audioFileSampleCount:(int64_t)audioFileSampleCount samplesPerGroup:(int64_t)samplesPerGroup leftWaveformData:(NSData *)leftWaveformData rightWaveformData:(NSData *)rightWaveformData;
 
- (void)didWaveformDataGenerationFailed:(int64_t)taskId audioFilePath:(NSString*)audioFilePath samplesPerGroup:(int64_t)samplesPerGroup;
 
@end
 
NVS_EXPORT @interface NvsWaveformDataGenerator : NSObject
@property (nonatomic, weak) id<NvsWaveformDataGeneratorDelegate> delegate;
 
- (instancetype)init;
 
- (int64_t)getAudioFileDuration:(NSString*)audioFilePath;
 
- (int64_t)getAudioFileSampleCount:(NSString*)audioFilePath;
 
- (void)cancelTask:(int64_t)taskId;
 
- (int64_t)generateWaveformData:(NSString*)audioFilePath samplesPerGroup:(int64_t)samplesPerGroup startGroupIndex:(int64_t)startGroupIndex groupCount:(int64_t)groupCount flags:(int)flags;
 
- (void)notifyWaveformDataReady:(int64_t)waveformTaskId samplesPerGroup:(int64_t)samplesPerGroup leftWaveformData:(NSData *)leftWaveformData rightWaveformData:(NSData *)rightWaveformData;
 
- (void)notifyWaveformDataFailed:(int64_t)waveformTaskId samplesPerGroup:(int64_t)samplesPerGroup;
 
@end