// // PFAudio.m // PFAudio // // Created by hpf on 17/2/7. // Copyright © 2017年 zmartec. All rights reserved. // #import "PFAudio.h" #import "voiceAmrFileCodec.h" #import "lame.h" @implementation PFAudio static PFAudio *instance; + (instancetype) shareInstance{ static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ instance = [[self alloc] init]; [instance setDefaultAttr]; }); return instance; } - (void) setDefaultAttr { _attrs = [[NSDictionary alloc] initWithObjectsAndKeys: [NSNumber numberWithFloat: 8000],AVSampleRateKey, //采样率 [NSNumber numberWithInt: kAudioFormatLinearPCM],AVFormatIDKey, [NSNumber numberWithInt:16],AVLinearPCMBitDepthKey,//采样位数 默认 16 [NSNumber numberWithInt: 2], AVNumberOfChannelsKey,//通道的数目 nil]; } //转换amr到wav //- (BOOL) amr2Wav:(NSString *)amrPath isDeleteSourchFile:(BOOL)isDelete{ - (NSString *)amr2Wav:(NSString *)amrPath isDeleteSourchFile:(BOOL)isDelete{ NSString *outPath = [[amrPath stringByDeletingPathExtension] stringByAppendingString:@".wav"]; BOOL isSuccess = DecodeAMRFileToWAVEFile([amrPath cStringUsingEncoding:NSASCIIStringEncoding], [outPath cStringUsingEncoding:NSASCIIStringEncoding]) ; if (isSuccess && isDelete) { NSFileManager *fm = [NSFileManager defaultManager]; [fm removeItemAtPath:amrPath error:nil]; } return isSuccess ? outPath : NULL; } //转换wav到amr - (NSString *)wav2Amr:(NSString *)wavPath isDeleteSourchFile:(BOOL)isDelete{ // 输出路径 NSString *outPath = [[wavPath stringByDeletingPathExtension] stringByAppendingString:@".amr"]; int rateKey = [self.attrs[AVLinearPCMBitDepthKey] intValue]; int numOfChannelsKey = [self.attrs[AVNumberOfChannelsKey] intValue]; int resultCode = EncodeWAVEFileToAMRFile([wavPath cStringUsingEncoding:NSASCIIStringEncoding], [outPath cStringUsingEncoding:NSASCIIStringEncoding], numOfChannelsKey, rateKey); if (resultCode != 0 && isDelete) { NSFileManager *fm = [NSFileManager defaultManager]; [fm removeItemAtPath:wavPath error:nil]; } return resultCode != 0 ? outPath : NULL; } // pcm转wav - (NSString *) pcm2Wav: (NSString *)pcmPath isDeleteSourchFile:(BOOL)isDelete{ NSString *outPath = [[pcmPath stringByDeletingPathExtension] stringByAppendingString:@".wav"]; NSData *data = [NSData dataWithContentsOfFile:pcmPath]; BOOL isSuccess = [[self writeWavHead:data] writeToFile:outPath atomically:YES]; if (isSuccess && isDelete) { NSFileManager *fm = [NSFileManager defaultManager]; [fm removeItemAtPath:pcmPath error:nil]; } return isSuccess ? outPath : NULL; } // pcm装amr //- (BOOL) pcm2Amr:(NSString *)pcmPath isDeleteSourchFile:(BOOL)isDelete{ - (NSString *) pcm2Amr:(NSString *)pcmPath isDeleteSourchFile:(BOOL)isDelete{ if ([self pcm2Wav:pcmPath isDeleteSourchFile:isDelete]) { NSString *wavPath = [[pcmPath stringByDeletingPathExtension] stringByAppendingString:@".wav"]; [self wav2Amr:wavPath isDeleteSourchFile:isDelete]; return wavPath; } return NULL; } //pcm转mp3 //- (BOOL) pcm2Mp3: (NSString *)pcmPath isDeleteSourchFile:(BOOL)isDelete - (NSString *) pcm2Mp3: (NSString *)pcmPath isDeleteSourchFile:(BOOL)isDelete { // 输入路径 NSString *inPath = pcmPath; // 判断输入路径是否存在 NSFileManager *fm = [NSFileManager defaultManager]; if (![fm fileExistsAtPath:pcmPath]) { NSLog(@"文件不存在"); return NULL;//NO; } // 输出路径 NSString *outPath = [[pcmPath stringByDeletingPathExtension] stringByAppendingString:@".mp3"]; @try { size_t read, write; FILE *pcm = fopen([inPath UTF8String], "rb"); //source 被转换的音频文件位置 fseek(pcm, 4*1024, SEEK_CUR); //skip file header FILE *mp3 = fopen([outPath UTF8String], "wb"); //output 输出生成的Mp3文件位置 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(); int rateKey = [self.attrs[AVSampleRateKey] intValue];//[self.attrs[AVSampleRateKey] intValue]; int numOfChannelsKey = [self.attrs[AVNumberOfChannelsKey] intValue]; lame_set_in_samplerate(lame, rateKey); lame_set_VBR(lame, vbr_default); lame_init_params(lame); lame_set_num_channels(lame, numOfChannelsKey);//设置1为单通道，默认为2双通道 lame_set_quality(lame, 0); /* 2=high 5 = medium 7=low 音质*/ do { size_t size = (size_t)(2 * sizeof(short int)); read = fread(pcm_buffer, size, PCM_SIZE, pcm); if (read == 0) write = lame_encode_flush(lame, mp3_buffer, MP3_SIZE); else write = lame_encode_buffer_interleaved(lame, pcm_buffer, (int)read, mp3_buffer, MP3_SIZE); fwrite(mp3_buffer, write, 1, mp3); } while (read != 0); lame_close(lame); fclose(mp3); fclose(pcm); } @catch (NSException *exception) { NSLog(@"%@",[exception description]); return NULL;//NO; } @finally { NSLog(@"MP3生成成功:"); if (isDelete) { NSError *error; [fm removeItemAtPath:pcmPath error:&error]; if (error == nil) { NSLog(@"删除源文件成功"); } } return outPath; } } // 为pcm文件写入wav头 - (NSData*) writeWavHead:(NSData *)audioData { long sampleRate = [self.attrs[AVSampleRateKey] longValue]; long numOfChannelsKey = [self.attrs[AVNumberOfChannelsKey] longValue]; Byte waveHead[44]; waveHead[0] = 'R'; waveHead[1] = 'I'; waveHead[2] = 'F'; waveHead[3] = 'F'; long totalDatalength = [audioData length] + 44; waveHead[4] = (Byte)(totalDatalength & 0xff); waveHead[5] = (Byte)((totalDatalength >> 8) & 0xff); waveHead[6] = (Byte)((totalDatalength >> 16) & 0xff); waveHead[7] = (Byte)((totalDatalength >> 24) & 0xff); waveHead[8] = 'W'; waveHead[9] = 'A'; waveHead[10] = 'V'; waveHead[11] = 'E'; waveHead[12] = 'f'; waveHead[13] = 'm'; waveHead[14] = 't'; waveHead[15] = ' '; waveHead[16] = 16; //size of 'fmt ' waveHead[17] = 0; waveHead[18] = 0; waveHead[19] = 0; waveHead[20] = 1; //format waveHead[21] = 0; waveHead[22] = numOfChannelsKey; //chanel waveHead[23] = 0; waveHead[24] = (Byte)(sampleRate & 0xff); waveHead[25] = (Byte)((sampleRate >> 8) & 0xff); waveHead[26] = (Byte)((sampleRate >> 16) & 0xff); waveHead[27] = (Byte)((sampleRate >> 24) & 0xff); long byteRate = sampleRate * 2 * (16 >> 3);; waveHead[28] = (Byte)(byteRate & 0xff); waveHead[29] = (Byte)((byteRate >> 8) & 0xff); waveHead[30] = (Byte)((byteRate >> 16) & 0xff); waveHead[31] = (Byte)((byteRate >> 24) & 0xff); waveHead[32] = 2*(16 >> 3); waveHead[33] = 0; waveHead[34] = 16; waveHead[35] = 0; waveHead[36] = 'd'; waveHead[37] = 'a'; waveHead[38] = 't'; waveHead[39] = 'a'; long totalAudiolength = [audioData length]; waveHead[40] = (Byte)(totalAudiolength & 0xff); waveHead[41] = (Byte)((totalAudiolength >> 8) & 0xff); waveHead[42] = (Byte)((totalAudiolength >> 16) & 0xff); waveHead[43] = (Byte)((totalAudiolength >> 24) & 0xff); NSMutableData *pcmData = [[NSMutableData alloc]initWithBytes:&waveHead length:sizeof(waveHead)]; [pcmData appendData:audioData]; return pcmData; } @end