public MSF.AudioBlock ParseAudioBlock(int offset, Stream _stream)
{
_stream.Seek(offset, SeekOrigin.Begin);
byte[] tmp = new byte[4];
MSF.AudioBlock ab = new MSF.AudioBlock();
_stream.Read(tmp, 0, 1);
ab.AudioFrameNum = (uint)BitTools.MaskBits(tmp, 0, 8);
ab.AudioBlockHeaderLength = ab.AudioFrameNum * 5 + 1;
uint addr = (uint)offset + ab.AudioBlockHeaderLength + CRC_Size;
for (int i = 0; i < ab.AudioFrameNum; i++)
{
//读音频参数集
MSF.AudioBlock.AudioFrame f = new MSF.AudioBlock.AudioFrame();
_stream.Read(tmp, 0, 2);
f.RelativeStartAddr = addr;
f.Length = (uint)BitTools.MaskBits(tmp, 0, 16);
// skip 音频流编号 和 保留
_stream.Seek(1, SeekOrigin.Current);
// 读相对时间
_stream.Read(tmp, 0, 2);
f.RelativeTime = BitTools.MaskBits(tmp, 0, 16) * timeUint;
// copy 音频流
//f._as = BitTools.CopyToNewStream(_stream, (long)f.RelativeStartAddr, (int)f.Length);
BitTools.CopyFromStreamToBytesArray(_stream, (long)f.RelativeStartAddr, (int)f.Length, ref f._data);
ab.aFrames.Add(f);
//下一段音频地址
addr += f.Length;
}
return(ab);
}
private MediaStreamSample GetAudioSample2()
{
MediaStreamSample sample = new MediaStreamSample(this.audioStreamDescription, null, 0, 0, 0, emptyDict);
if (m_AmediaStreamEnd)
{
return(sample);
}
if (aIdx > (aNum - 1))
{
// free current video block
m_curAudioBlk = null;
m_abuffer.WaitForWorkItem();
m_curAudioBlk = (MSF.AudioBlock)m_abuffer.Dequeue().CommandParameter;
if (m_curAudioBlk != null)
{
if (m_abuffer.Count() == 0)
{
m_aBufferFullEvent.Reset();
}
aIdx = 0;
aNum = (int)m_curAudioBlk.AudioFrameNum;
}
else
{
m_AmediaStreamEnd = true;
return(sample);
}
}
MemoryStream aStream = new MemoryStream();
//LATM 封装，第一个字节是length, 跳过第一个字节, 相应的长度应该减1
int len = (int)m_curAudioBlk.aFrames[aIdx].Length - 1;
aStream.Write(m_curAudioBlk.aFrames[aIdx]._data, 1, len);
MediaStreamSample mediaStreamSample = new MediaStreamSample
(
this.audioStreamDescription,
aStream,
0,
len,
m_curAudioBlk.aFrames[aIdx].RelativeTime, //// 以100 纳秒为单位
emptyDict
);
aIdx++;
return(mediaStreamSample);
}
private MediaStreamSample GetAudioSample2()
{
MediaStreamSample sample = new MediaStreamSample(this.audioStreamDescription, null, 0, 0, 0, emptyDict);
if (m_AmediaStreamEnd)
return sample;
if (aIdx > (aNum - 1))
{
// free current video block
m_curAudioBlk = null;
m_abuffer.WaitForWorkItem();
m_curAudioBlk = (MSF.AudioBlock)m_abuffer.Dequeue().CommandParameter ;
if (m_curAudioBlk != null)
{
if (m_abuffer.Count() == 0)
m_aBufferFullEvent.Reset();
aIdx = 0;
aNum = (int)m_curAudioBlk.AudioFrameNum;
}
else
{
m_AmediaStreamEnd = true;
return sample;
}
}
MemoryStream aStream = new MemoryStream();
//LATM 封装，第一个字节是length, 跳过第一个字节, 相应的长度应该减1
int len = (int)m_curAudioBlk.aFrames[aIdx].Length - 1;
aStream.Write(m_curAudioBlk.aFrames[aIdx]._data, 1, len);
MediaStreamSample mediaStreamSample = new MediaStreamSample
(
this.audioStreamDescription,
aStream,
0,
len,
m_curAudioBlk.aFrames[aIdx].RelativeTime, //// 以100 纳秒为单位
emptyDict
);
aIdx++;
return mediaStreamSample;
}
public MSF.AudioBlock ParseAudioBlock(int offset, Stream _stream)
{
_stream.Seek(offset, SeekOrigin.Begin);
byte[] tmp = new byte[4];
MSF.AudioBlock ab = new MSF.AudioBlock();
_stream.Read(tmp, 0, 1);
ab.AudioFrameNum = (uint)BitTools.MaskBits(tmp, 0, 8);
ab.AudioBlockHeaderLength = ab.AudioFrameNum * 5 +1;
uint addr = (uint)offset + ab.AudioBlockHeaderLength + CRC_Size;
for (int i = 0; i < ab.AudioFrameNum; i++)
{
//读音频参数集
MSF.AudioBlock.AudioFrame f = new MSF.AudioBlock.AudioFrame();
_stream.Read(tmp, 0, 2);
f.RelativeStartAddr = addr;
f.Length = (uint)BitTools.MaskBits(tmp, 0, 16);
// skip 音频流编号 和 保留
_stream.Seek(1, SeekOrigin.Current);
// 读相对时间
_stream.Read(tmp, 0, 2);
f.RelativeTime = BitTools.MaskBits(tmp, 0, 16) * timeUint;
// copy 音频流
//f._as = BitTools.CopyToNewStream(_stream, (long)f.RelativeStartAddr, (int)f.Length);
BitTools.CopyFromStreamToBytesArray(_stream, (long)f.RelativeStartAddr, (int)f.Length, ref f._data);
ab.aFrames.Add(f);
//下一段音频地址
addr += f.Length;
}
return ab;
}
