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上传用户:sy_wanhua
上传日期:2013-07-25
资源大小:3048k
文件大小:2k
- CHANGES FILE
- This tarball is ixj-0.1.30.tgz and has the following changes included
- since the previous release:
- - the ixj.o driver has the following improvements:
- - Internet LineJACK POTS port support. The LineJACK PSTN support
- is not implemented yet. However, the LineJACK will now do
- everything that the PhoneJACK will do.
- - added the ability to set the buffer "depth" for reads and writes
- to the codecs. The default depth of buffers is 2 frames, but this
- can be changed via the IXJCTL_REC_DEPTH ioctl. From the ixjuser.h file:
- * The IXJCTL_REC_DEPTH command sets the internal buffer depth of the DSP.
- * Setting a lower depth reduces latency, but increases the demand of the
- * application to service the driver without frame loss. The DSP has 480
- * bytes of physical buffer memory for the record channel so the true
- * maximum limit is determined by how many frames will fit in the buffer.
- *
- * 1 uncompressed (480 byte) 16-bit linear frame.
- * 2 uncompressed (240 byte) 8-bit A-law/mu-law frames.
- * 15 TrueSpeech 8.5 frames.
- * 20 TrueSpeech 6.3,5.3,4.8 or 4.1 frames.
- *
- * The default in the driver is currently set to 2 frames.
- Setting the depth to 1 frame significantly reduces the latency when
- using a compressed codec.
- - the DSP is properly shut down and idled upon a device close. Previously,
- failure to idle the DSP would result in system lockups in some scenarios.
- - hook switch detection now works properly when tones are being played.
- - the IXJ-HOWTO file has been updated to reflect the new way to load and
- unload the driver
- - the FAQ file was overhauled and updated to add some of the key issues that
- have come up in recent weeks.