public MPAInfo(MPAHeader hdr, UInt64 duration)
{
ai_ = new AudioInfo();
ai_.bitRate = MPAHeaderParser.bitrate(hdr);
ai_.bitsPerSample = 16;
ai_.channels = (UInt16)(hdr.channelMode < 3 ? 2 : 1);
ai_.sampleRate = MPAHeaderParser.samplingRate(hdr);
ai_.layer = (UInt16)(4 - hdr.layer);
ai_.vbr = false; //todo
duration_ = duration;
switch (hdr.version)
{
case 3:
{
mt_ = MediaType.MPEG10; break;
}
case 2:
{
mt_ = MediaType.MPEG20; break;
}
case 0:
{
mt_ = MediaType.MPEG25; break;
}
}
}
public ErrorCode first(out IMediaInfo info)
{
AudioInfo ai = new AudioInfo();
ai.bitsPerSample = bps_;
ai.channels = channels_;
ai.sampleRate = (UInt16)frequency_;
UInt64 duration = 800000 * length_ / ((UInt64)channels_ * (UInt64)bps_ * (UInt64)frequency_);
info = new WaveInfo(ai, duration);
return ErrorCode.Success;
}
public WaveInfo(AudioInfo ai, UInt64 duration)
{
ai_ = ai;
duration_ = duration;
}
