On Tue, 21 Jul 2020 19:00:01 +0200, Srinivas Kandagatla wrote: > > For gapless playback it is possible that each track can have different > codec profile with same decoder, for example we have WMA album, > we may have different tracks as WMA v9, WMA v10 and so on > Or if DSP's like QDSP have abililty to switch decoders on single stream > for each track, then this call could be used to set new codec parameters. > > Existing code does not allow to change this profile while doing gapless > playback. > > This patchset adds new SNDRV_COMPRESS_SET_CODEC_PARAMS IOCTL along with > flags in capablity structure to allow userspace to set this new > parameters required which switching codec profile, either for gapless > or cross fade usecase. One idea that came up at the previous audio conference regarding this implementation was to just allow SET_PARAMS during the stream is running (only if the driver sets the capability) instead of introducing yet a new ioctl and an ops. Would it make sense? I have no big objection to add a new ioctl if other people agree, though. thanks, Takashi
