[LAD] How to save and restore MIDI connexion (ALSA sequencer)

[Stéphane Brunner]

Hello !

Thanks for your response but I don't succeed to have something working :(

my code :
init:
    if (snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, 0) >= 0) {
        m_iClient = snd_seq_set_client_name(seq, "LiveMix");
        m_iPort = snd_seq_create_simple_port(seq, "control", 0,
                SND_SEQ_PORT_TYPE_MIDI_GENERIC | SND_SEQ_PORT_TYPE_SOFTWARE
| SND_SEQ_PORT_TYPE_APPLICATION);
        m_iMidi = snd_seq_create_simple_port(seq, "control",
                SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ |
SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_SUBS_WRITE,
                SND_SEQ_PORT_TYPE_APPLICATION);
    } else {
        qDebug() << "The ALSA MIDI system is not available. No ports based
on it will be created";
    }

get (to save) :
    snd_seq_client_info_t *cinfo;
    snd_seq_port_info_t *pinfo;
    snd_seq_client_info_alloca(&cinfo);
    snd_seq_port_info_alloca(&pinfo);
    snd_seq_client_info_set_client(cinfo, -1);
    snd_seq_port_info_set_client(pinfo,
snd_seq_client_info_get_client(cinfo));
    snd_seq_port_info_set_port(pinfo, m_iMidi);
    snd_seq_query_subscribe_set_client(subs, m_iClient);
    snd_seq_query_subscribe_set_port(subs, m_iMidi);
    snd_seq_query_subscribe_set_type(subs, SND_SEQ_QUERY_SUBS_READ);
    snd_seq_query_subscribe_set_index(subs, 0);
    while (snd_seq_query_port_subscribers(seq, subs) >= 0) {
        const snd_seq_addr_t *addr;
        addr = snd_seq_query_subscribe_get_addr(subs);
        qDebug()<<222<<addr->client<<addr->port;
        snd_seq_query_subscribe_set_index(subs,
snd_seq_query_subscribe_get_index(subs) + 1);
    }

    snd_seq_query_subscribe_alloca(&subs);
    snd_seq_query_subscribe_set_client(subs, m_iClient);
    snd_seq_query_subscribe_set_port(subs, m_iMidi);
    snd_seq_query_subscribe_set_type(subs, SND_SEQ_QUERY_SUBS_WRITE);
    snd_seq_query_subscribe_set_index(subs, 0);
    while (snd_seq_query_port_subscribers(seq, subs) >= 0) {
        const snd_seq_addr_t *addr;
        addr = snd_seq_query_subscribe_get_addr(subs);
        qDebug()<<333<<addr->client<<addr->port;
    }

The first block seem to return all the client-port, the second return
nothing.  :(

Does anybody have an idea ?

Thanks in advance
Stéphane



On Dec 10, 2007 9:02 AM, Clemens Ladisch < cladisch at fastmail.net> wrote:

> Stéphane Brunner wrote:
> > Than I want to know with port will be connected on witch other to
> reconnect
> > it on other LiveMix run.
>
> Try snd_seq_query_port_subscribers().
>
>
> HTH
> Clemens
> _______________________________________________
> Linux-audio-dev mailing list
> Linux-audio-dev at lists.linuxaudio.org
> http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
>



-- 
Stéphane Brunner
mail : stephane.brunner at gmail.com
messageries instantanées : stephane.brunner at gmail.com (
http://talk.google.com)
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