Subject: Re: [linux-audio-user] alsa sequencer filter client
From: Benjamin Flaming (lau_AT_solobanjo.com)
Date: Sat Jan 24 2004 - 23:04:21 EET
You'll probably have better luck on the LAD list :)
|)
|)enji
On Friday 23 January 2004 10:46 pm, Garett Shulman wrote:
> Hello, I am trying to create a very simple midi filter client for the
> alsa sequencer based on aseqview-0.1.4. I have alsa 0.9.8. This code
> shows the input and the output port in aconnect when executed. And, when
> the raw_midi client is connected The callback does get called when I
> play keys on my piano. However, Its as though the message is getting
> sent back to this client and not on to the next client. The
> process_event function keeps getting called over and over again with the
> same message when I hit one piano key. It's as though it is sending
> itself the message. Any Ideas are greatly appreciated. -Garett
>
> #include "portlib.h"
>
> int process_event(port_t *p, int type, snd_seq_event_t *ev, int
> *priate_data)
> {
> port_write_event(p, ev, 0);
> }
>
> int main()
> {
> unsigned int caps = SND_SEQ_PORT_CAP_WRITE |
> SND_SEQ_PORT_CAP_SUBS_WRITE | SND_SEQ_PORT_CAP_READ |
> SND_SEQ_PORT_CAP_SUBS_READ;
>
> port_client_t *client = port_client_new("MIDI filter",
> SND_SEQ_OPEN_DUPLEX);
> port_t *port = port_attach(client, "FILTER port", caps,
> SND_SEQ_PORT_TYPE_MIDI_GENERIC);
> int *priv_data;
>
> /* add callback */
> port_add_callback(port, PORT_MIDI_EVENT_CB,
> (port_callback_t)process_event, priv_data);
>
> port_client_do_loop(client);
>
> return port_detach(port);
> }
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