private byte[] DecMultiAAC(byte[] buffer)
{
AAC_ADTS[] aacs = null;
try
{
aacs = AAC_ADTS.GetMultiAAC(buffer);
}
catch (Exception ex)
{
Console.WriteLine(ex);
aacs = null;
}
if (aacs != null)
{
if (aacs.Length == 1)
{
return(DecAAC(buffer));
}
else
{
return(DecMultiAAC(aacs));
}
}
else
{
return(null);
}
}
public static AAC_ADTS[] GetMultiAAC(byte[] bs)
{
var ms = new MemoryStream(bs);
List <AAC_ADTS> aacs = new List <AAC_ADTS>();
while (ms.Position + 7 < ms.Length)
{
var aac = new AAC_ADTS(ms);
aacs.Add(aac);
}
return(aacs.ToArray());
}
private void Init(byte[] buffer)
{
if (!_inited)
{
AAC_ADTS[] adtss = AAC_ADTS.GetMultiAAC(buffer);
if (adtss != null)
{
int channels = adtss[0].MPEG_4_Channel_Configuration;
int frequency = adtss[0].Frequency;
//_aac = new FaadImp();
_aac = new FFImp(AVCodecCfg.CreateAudio(channels, frequency, (int)AVCode.CODEC_ID_AAC), true, false);
_inited = true;
}
}
}
public static Boolean Check(int frequency, int channel, byte[] bs)
{
try {
var aac = new AAC_ADTS(bs);
if (aac.AACDataLen != aac.AACData.Length)
{
return(false);
}
var frequencys = new int[] { 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 2000, 11025 };
if (frequencys[aac.MPEG_4_Sampling_Frequency_Index] != frequency)
{
return(false);
}
if (aac.MPEG_4_Channel_Configuration != channel)
{
return(false);
}
return(true);
} catch {
return(false);
}
}