Tool encapsulation for PCM conversion MP3 and pcmmp3

Tool encapsulation for PCM conversion MP3 and pcmmp3

Tool encapsulation for PCM conversion MP3

 

Description

1. Simple encapsulation of PCM to MP3.

2. Use the https://github.com/wuqiong/mp3lame-for-iOS to generate a 64-bit lame library.

 

Source code

Https://github.com/YouXianMing/iOS-General-Tools in PCM-to-MP3

//// PcmToMp3Manager. h // RecordMusic /// Created by YouXianMing on 16/7/28. // Copyright©2016 YouXianMing. all rights reserved. /// Lame-for-iOS https://github.com/wuqiong/mp3lame-for-iOS//#import <Foundation/Foundation. h> @ class PcmToMp3Manager; @ protocol PcmToMp3ManagerDelegate <NSObject> @ optional/*** Did convert the pcm to mp3. ** @ param manager The PcmToMp3Manager object. * @ param sucess Sucess or not. * @ param errorInfo Error info. */-(void) didConvertPcmToMp3 :( PcmToMp3Manager *) manager sucess :( BOOL) sucess errorInfo :( NSString *) errorInfo; @ end/*** In "Build Phases ", you can add '-Wno-shorten-64-to-32' to the file 'PcmToMp3Manager. m' to ignore the warning. */@ interface PcmToMp3Manager: NSObject/*** The PcmToMp3Manager's delegate. */@ property (nonatomic, weak) id <PcmToMp3ManagerDelegate> delegate;/*** The pcm file's path. */@ property (nonatomic, strong) NSString * pcmFilePath;/*** The mp3 file's path you specified. */@ property (nonatomic, strong) NSString * mp3FilePath;/*** Before you start convert, you shocould specified the pcm file's path. */-(void) startConvert; @ end

//// PcmToMp3Manager. m // RecordMusic /// Created by YouXianMing on 16/7/28. // Copyright©2016 YouXianMing. all rights reserved. // # import "PcmToMp3Manager. h "# import <lame/lame. h> @ implementation PcmToMp3Manager-(void) startConvert {NSParameterAssert (self. pcmFilePath); BOOL isDirectory = NO; BOOL isExist = [[NSFileManager defaultManager] fileExistsAtPath: self. pcmFilePath isDirectory: & isDirectory]; if (isExist & isDirectory = NO) {dispatch_async (dispatch_get_global_queue (0, 0), ^ {@ tr Y {int read, write; FILE * pcm = fopen ([self. pcmFilePath cStringUsingEncoding: 1], "rb"); // source fseek (pcm, 4*1024, SEEK_CUR); // skip file header FILE * mp3 = fopen({self}filepath cStringUsingEncoding: 1], "wb"); // output const int PCM_SIZE = 8192; const int MP3_SIZE = 8192; short int pcm_buffer [PCM_SIZE * 2]; unsigned char mp3_buffer [MP3_SIZE]; lame_t lame = lame_init (); lame_set_in_samplerate (Lame, 44100); lame_set_VBR (lame, vbr_default); lame_init_params (lame); do {read = fread (pcm_buffer, 2 * sizeof (short int), PCM_SIZE, pcm ); if (read = 0) {write = lame_encode_flush (lame, mp3_buffer, MP3_SIZE);} else {write = cursor (lame, pcm_buffer, read, mp3_buffer, MP3_SIZE );} fwrite (mp3_buffer, write, 1, mp3);} while (read! = 0); lame_close (lame); fclose (mp3); fclose (pcm) ;}@ catch (NSException * exception) {if (self. delegate & [self. delegate respondsToSelector: @ selector (didConvertPcmToMp3: sucess: errorInfo :)]) {dispatch_async (dispatch_get_main_queue (), ^ {[self. delegate didConvertPcmToMp3: self sucess: NO errorInfo: exception. description] ;}}@finally {if (self. delegate & [self. delegate respondsToSelector: @ selector (didConvertPcmToMp3: sucess: errorInfo :)]) {dispatch_async (dispatch_get_main_queue (), ^ {[self. delegate didConvertPcmToMp3: self sucess: YES errorInfo: nil] ;}}}) ;}else {if (self. delegate & [self. delegate respondsToSelector: @ selector (didConvertPcmToMp3: sucess: errorInfo :)]) {dispatch_async (dispatch_get_main_queue (), ^ {[self. delegate didConvertPcmToMp3: self sucess: NO errorInfo: [NSString stringWithFormat: @ "'% @' not exist. ", self. pcmFilePath] ;}}}@ end

 

Details

To remove the warning of PcmToMp3Manager, addWno-shorten-64-to-32You can.