AAC ADTS流解析總結
這裏列出Android裏將aac編碼器輸出的音頻幀加上ADTS頭的代碼：
+ int tmpFd; + tmpFd = ::open("/data/src.aac", O_WRONLY | O_APPEND ); + if ( tmpFd < 0 ) { + LOGE("No dump decode file %s",strerror(errno)); + } + else + { + unsigned char adts_hdr[7] = {0xff, 0xf9, 0x5c, 0x80, 0x00,0x1f, 0xfc}; + + adts_hdr[3] = 0x80 | ((mConfig->inputBufferCurrentLength >> 11) & 3); + adts_hdr[4] = (mConfig->inputBufferCurrentLength >> 3) & 0xff; + adts_hdr[5] = ((mConfig->inputBufferCurrentLength & 7) << 5) | 0x1f; + + ::write(tmpFd,adts_hdr, 7); + ::write(tmpFd,(const char *)mConfig->pInputBuffer , mConfig->inputBufferCurrentLength); + ::close(tmpFd); + } AAC參考知識： http://blog.csdn.net/jay100500/article/details/52955232 http://blog.csdn.net/leixiaohua1020/article/details/11822537 |
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AAC ADTS流解析總結