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Sourcecode: pulseaudio version File versions  Download package

pa_simple* pa_simple_new ( const char *  server,
const char *  name,
pa_stream_direction_t  dir,
const char *  dev,
const char *  stream_name,
const pa_sample_spec ss,
const pa_channel_map map,
const pa_buffer_attr attr,
int *  error 
)

Create a new connection to the server

Parameters:
serverServer name, or NULL for default
nameA descriptive name for this client (application name, ...)
dirOpen this stream for recording or playback?
devSink (resp. source) name, or NULL for default
stream_nameA descriptive name for this client (application name, song title, ...)
ssThe sample type to use
mapThe channel map to use, or NULL for default
attrBuffering attributes, or NULL for default
errorA pointer where the error code is stored when the routine returns NULL. It is OK to pass NULL here.

Definition at line 140 of file simple.c.

References pa_sample_spec::channels, pa_channel_map::channels, PA_CONTEXT_IS_GOOD(), PA_CONTEXT_READY, PA_ERR_INTERNAL, PA_ERR_INVALID, PA_STREAM_ADJUST_LATENCY, PA_STREAM_AUTO_TIMING_UPDATE, PA_STREAM_INTERPOLATE_TIMING, PA_STREAM_IS_GOOD(), PA_STREAM_PLAYBACK, PA_STREAM_READY, PA_STREAM_RECORD, and pa_xnew0.

                     {

    pa_simple *p;
    int error = PA_ERR_INTERNAL, r;

    CHECK_VALIDITY_RETURN_ANY(rerror, !server || *server, PA_ERR_INVALID, NULL);
    CHECK_VALIDITY_RETURN_ANY(rerror, dir == PA_STREAM_PLAYBACK || dir == PA_STREAM_RECORD, PA_ERR_INVALID, NULL);
    CHECK_VALIDITY_RETURN_ANY(rerror, !dev || *dev, PA_ERR_INVALID, NULL);
    CHECK_VALIDITY_RETURN_ANY(rerror, ss && pa_sample_spec_valid(ss), PA_ERR_INVALID, NULL);
    CHECK_VALIDITY_RETURN_ANY(rerror, !map || (pa_channel_map_valid(map) && map->channels == ss->channels), PA_ERR_INVALID, NULL)

    p = pa_xnew0(pa_simple, 1);
    p->direction = dir;

    if (!(p->mainloop = pa_threaded_mainloop_new()))
        goto fail;

    if (!(p->context = pa_context_new(pa_threaded_mainloop_get_api(p->mainloop), name)))
        goto fail;

    pa_context_set_state_callback(p->context, context_state_cb, p);

    if (pa_context_connect(p->context, server, 0, NULL) < 0) {
        error = pa_context_errno(p->context);
        goto fail;
    }

    pa_threaded_mainloop_lock(p->mainloop);

    if (pa_threaded_mainloop_start(p->mainloop) < 0)
        goto unlock_and_fail;

    for (;;) {
        pa_context_state_t state;

        state = pa_context_get_state(p->context);

        if (state == PA_CONTEXT_READY)
            break;

        if (!PA_CONTEXT_IS_GOOD(state)) {
            error = pa_context_errno(p->context);
            goto unlock_and_fail;
        }

        /* Wait until the context is ready */
        pa_threaded_mainloop_wait(p->mainloop);
    }

    if (!(p->stream = pa_stream_new(p->context, stream_name, ss, map))) {
        error = pa_context_errno(p->context);
        goto unlock_and_fail;
    }

    pa_stream_set_state_callback(p->stream, stream_state_cb, p);
    pa_stream_set_read_callback(p->stream, stream_request_cb, p);
    pa_stream_set_write_callback(p->stream, stream_request_cb, p);
    pa_stream_set_latency_update_callback(p->stream, stream_latency_update_cb, p);

    if (dir == PA_STREAM_PLAYBACK)
        r = pa_stream_connect_playback(p->stream, dev, attr,
                                       PA_STREAM_INTERPOLATE_TIMING
                                       |PA_STREAM_ADJUST_LATENCY
                                       |PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL);
    else
        r = pa_stream_connect_record(p->stream, dev, attr,
                                     PA_STREAM_INTERPOLATE_TIMING
                                     |PA_STREAM_ADJUST_LATENCY
                                     |PA_STREAM_AUTO_TIMING_UPDATE);

    if (r < 0) {
        error = pa_context_errno(p->context);
        goto unlock_and_fail;
    }

    for (;;) {
        pa_stream_state_t state;

        state = pa_stream_get_state(p->stream);

        if (state == PA_STREAM_READY)
            break;

        if (!PA_STREAM_IS_GOOD(state)) {
            error = pa_context_errno(p->context);
            goto unlock_and_fail;
        }

        /* Wait until the stream is ready */
        pa_threaded_mainloop_wait(p->mainloop);
    }

    pa_threaded_mainloop_unlock(p->mainloop);

    return p;

unlock_and_fail:
    pa_threaded_mainloop_unlock(p->mainloop);

fail:
    if (rerror)
        *rerror = error;
    pa_simple_free(p);
    return NULL;
}

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