使用lamp第三方库
- (void)toMP3
{
@try
{
[ShowLoading show:NO];
int read, write;
FILE *pcm = fopen([[NSHomeDirectory() stringByAppendingPathComponent:_strCafSavePath] cStringUsingEncoding:1], "rb"); //source 被转换的音频文件位置
fseek(pcm, 4*1024, SEEK_CUR); //skip file header
FILE *mp3 = fopen([[NSHomeDirectory() stringByAppendingPathComponent:_strMp3SavePath] cStringUsingEncoding:1], "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();
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 = lame_encode_buffer_interleaved(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)
{
NSLog(@"%@",[exception description]);
}
@finally
{
[ShowLoading hidden];
if ([self.delegate respondsToSelector:@selector(saveVoiceFinish)]) {
[self.delegate saveVoiceFinish];
}
}
}
