David Garcia Garzon wrote: > SND_SEQ_PORT_TYPE_SPECIFIC Hardware specific port
something hardware-specific (obviously :-) > SND_SEQ_PORT_TYPE_MIDI_GENERIC Generic MIDI device Understands MIDI events/commands. > SND_SEQ_PORT_TYPE_MIDI_GM General MIDI compatible device > SND_SEQ_PORT_TYPE_MIDI_GS GS compatible device > SND_SEQ_PORT_TYPE_MIDI_XG XG compatible device > SND_SEQ_PORT_TYPE_MIDI_MT32 MT-32 compatible device Support for these standards. Not necessarily full support, and the availability of instruments may depend on loaded soundfonts, but basic things like bank selection and drum channel selection should work. This is not set for external ports like MPU-401 which may have a compatible device connected to them. > SND_SEQ_PORT_TYPE_SYNTH Synth device Device can playback sound via the SAMPLE_* events. (The OPL3 driver sets this flag too, so either this driver or my description is wrong.) > SND_SEQ_PORT_TYPE_DIRECT_SAMPLE Sampling device (supporting download) Can download instrument samples (SND_SEQ_EVENT_INSTR_PUT etc.) > SND_SEQ_PORT_TYPE_SAMPLE Sampling device (sample can be downloaded at any time) No ALSA driver sets this. I don't know what "at any time" means; the INSTR_* events _can_ be sent at any time. > SND_SEQ_PORT_TYPE_APPLICATION Application (sequencer/editor) This port is (usually) controlled by the user, and not by events sent to it. > But which are the implications of setting up a port with such flags? > - Are they merely informative? Yes. > - Will Alsa coerce or enhance the port usage depending on that type? No. ALSA never looks at these flags, except when someone wants to read port information. > - Can the user see that information in any way? It isn't even shown in the proc files AFAIK. > What is the use, in a programmer view, of alsa sequencer port type > flags? Not much. They're more or less useless for automatic selection/ filtering of ports. It may be possible to show them to the user, but they won't be accurate in every case. HTH Clemens ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
