C++ pa_source_output_assert_ref函数代码示例

static pa_hook_result_t source_output_put_cb(pa_core *core, pa_source_output *i, struct userdata *u) {
    pa_core_assert_ref(core);
    pa_source_output_assert_ref(i);
    pa_assert(u);

    return process(u, PA_OBJECT(i), FALSE);
}

/* Called from main context */
void pa_source_output_kill(pa_source_output*o) {
    pa_source_output_assert_ref(o);
    pa_assert_ctl_context();
    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));

    o->kill(o);
}

/* Called from input thread context */
static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) {
    struct userdata *u;
    pa_memchunk copy;

    pa_source_output_assert_ref(o);
    pa_source_output_assert_io_context(o);
    pa_assert_se(u = o->userdata);

    if (u->skip > chunk->length) {
        u->skip -= chunk->length;
        return;
    }

    if (u->skip > 0) {
        copy = *chunk;
        copy.index += u->skip;
        copy.length -= u->skip;
        u->skip = 0;

        chunk = ©
    }

    pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_POST, NULL, 0, chunk, NULL);
    u->send_counter += (int64_t) chunk->length;
}

/* Called from main context */
pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec) {
    pa_source_output_assert_ref(o);
    pa_assert_ctl_context();

    if (PA_SOURCE_OUTPUT_IS_LINKED(o->state) && o->source) {
        pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o), PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
        return usec;
    }

    /* If this source output is not realized yet or is being moved, we
     * have to touch the thread info data directly */

    if (o->source) {
        if (!(o->source->flags & PA_SOURCE_DYNAMIC_LATENCY))
            usec = pa_source_get_fixed_latency(o->source);

        if (usec != (pa_usec_t) -1) {
            pa_usec_t min_latency, max_latency;
            pa_source_get_latency_range(o->source, &min_latency, &max_latency);
            usec = PA_CLAMP(usec, min_latency, max_latency);
        }
    }

    o->thread_info.requested_source_latency = usec;

    return usec;
}

/* Called from main thread */
static void source_output_moving_cb(pa_source_output *o, pa_source *dest) {
    pa_proplist *p;
    const char *n;
    struct userdata *u;

    if (!dest)
        return;

    pa_source_output_assert_ref(o);
    pa_assert_ctl_context();
    pa_assert_se(u = o->userdata);

    p = pa_proplist_new();
    pa_proplist_setf(p, PA_PROP_MEDIA_NAME, "Loopback of %s", pa_strnull(pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION)));

    if ((n = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_ICON_NAME)))
        pa_proplist_sets(p, PA_PROP_MEDIA_ICON_NAME, n);

    pa_sink_input_update_proplist(u->sink_input, PA_UPDATE_REPLACE, p);
    pa_proplist_free(p);

    if (pa_source_get_state(dest) == PA_SOURCE_SUSPENDED)
        pa_sink_input_cork(u->sink_input, true);
    else
        pa_sink_input_cork(u->sink_input, false);

    update_adjust_timer(u);
}

/* Called from main thread */
static void source_output_moving_cb(pa_source_output *o, pa_source *dest) {
    struct userdata *u;
    char *input_description;
    const char *n;

    if (!dest)
        return;

    pa_source_output_assert_ref(o);
    pa_assert_ctl_context();
    pa_assert_se(u = o->userdata);

    input_description = pa_sprintf_malloc("Loopback of %s",
                                          pa_strnull(pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION)));
    pa_sink_input_set_property(u->sink_input, PA_PROP_MEDIA_NAME, input_description);
    pa_xfree(input_description);

    if ((n = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_ICON_NAME)))
        pa_sink_input_set_property(u->sink_input, PA_PROP_DEVICE_ICON_NAME, n);

    if (pa_source_get_state(dest) == PA_SOURCE_SUSPENDED)
        pa_sink_input_cork(u->sink_input, true);
    else
        pa_sink_input_cork(u->sink_input, false);

    update_adjust_timer(u);
}

/* Called from main context */
void pa_source_output_send_event(pa_source_output *o, const char *event, pa_proplist *data) {
    pa_proplist *pl = NULL;
    pa_source_output_send_event_hook_data hook_data;

    pa_source_output_assert_ref(o);
    pa_assert_ctl_context();
    pa_assert(event);

    if (!o->send_event)
        return;

    if (!data)
        data = pl = pa_proplist_new();

    hook_data.source_output = o;
    hook_data.data = data;
    hook_data.event = event;

    if (pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_SEND_EVENT], &hook_data) < 0)
        goto finish;

    o->send_event(o, event, data);

finish:
    if (pl)
        pa_proplist_free(pl);
}

/* Called from main context */
int pa_source_output_move_to(pa_source_output *o, pa_source *dest, pa_bool_t save) {
    int r;

    pa_source_output_assert_ref(o);
    pa_assert_ctl_context();
    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
    pa_assert(o->source);
    pa_source_assert_ref(dest);

    if (dest == o->source)
        return 0;

    if (!pa_source_output_may_move_to(o, dest))
        return -PA_ERR_NOTSUPPORTED;

    pa_source_output_ref(o);

    if ((r = pa_source_output_start_move(o)) < 0) {
        pa_source_output_unref(o);
        return r;
    }

    if ((r = pa_source_output_finish_move(o, dest, save)) < 0) {
        pa_source_output_fail_move(o);
        pa_source_output_unref(o);
        return r;
    }

    pa_source_output_unref(o);

    return 0;
}

/* Called from main context */
int pa_source_output_start_move(pa_source_output *o) {
    pa_source *origin;
    int r;

    pa_source_output_assert_ref(o);
    pa_assert_ctl_context();
    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));
    pa_assert(o->source);

    if (!pa_source_output_may_move(o))
        return -PA_ERR_NOTSUPPORTED;

    if ((r = pa_hook_fire(&o->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_START], o)) < 0)
        return r;

    origin = o->source;

    pa_idxset_remove_by_data(o->source->outputs, o, NULL);

    if (pa_source_output_get_state(o) == PA_SOURCE_OUTPUT_CORKED)
        pa_assert_se(origin->n_corked-- >= 1);

    pa_assert_se(pa_asyncmsgq_send(o->source->asyncmsgq, PA_MSGOBJECT(o->source), PA_SOURCE_MESSAGE_REMOVE_OUTPUT, o, 0, NULL) == 0);

    pa_source_update_status(o->source);
    o->source = NULL;

    pa_source_output_unref(o);

    return 0;
}

/* Called from main context */
void pa_source_output_cork(pa_source_output *o, pa_bool_t b) {
    pa_source_output_assert_ref(o);
    pa_assert_ctl_context();
    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->state));

    source_output_set_state(o, b ? PA_SOURCE_OUTPUT_CORKED : PA_SOURCE_OUTPUT_RUNNING);
}

/* Called from thread context */
void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes /* in source sample spec */) {

    pa_source_output_assert_ref(o);
    pa_source_output_assert_io_context(o);
    pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
    pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));

    if (nbytes <= 0)
        return;

    if (o->process_rewind) {
        pa_assert(pa_memblockq_get_length(o->thread_info.delay_memblockq) == 0);

        if (o->thread_info.resampler)
            nbytes = pa_resampler_result(o->thread_info.resampler, nbytes);

        pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) nbytes);

        if (nbytes > 0)
            o->process_rewind(o, nbytes);

        if (o->thread_info.resampler)
            pa_resampler_reset(o->thread_info.resampler);

    } else
        pa_memblockq_rewind(o->thread_info.delay_memblockq, nbytes);
}

/* Called from main thread */
static void source_output_moving_cb(pa_source_output *o, pa_source *dest) {
    struct userdata *u;

    pa_source_output_assert_ref(o);
    pa_assert_ctl_context();
    pa_assert_se(u = o->userdata);

    if (dest) {
        pa_source_set_asyncmsgq(u->source, dest->asyncmsgq);
        pa_source_update_flags(u->source, PA_SOURCE_LATENCY|PA_SOURCE_DYNAMIC_LATENCY, dest->flags);
    } else
        pa_source_set_asyncmsgq(u->source, NULL);

    if (u->auto_desc && dest) {
        const char *k;
        pa_proplist *pl;

        pl = pa_proplist_new();
        k = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION);
        pa_proplist_setf(pl, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : dest->name);

        pa_source_update_proplist(u->source, PA_UPDATE_REPLACE, pl);
        pa_proplist_free(pl);
    }
}

/* Called from I/O thread context */
static void cmtspeech_source_output_state_change_cb(pa_source_output *o, pa_source_output_state_t state) {
    struct userdata *u;

    pa_source_output_assert_ref(o);
    pa_assert_se(u = o->userdata);

    pa_log_debug("State changed %d -> %d", o->thread_info.state, state);
}

/* Called from main context */
static pa_usec_t source_output_get_latency_cb(pa_source_output *o) {
    connection*c;

    pa_source_output_assert_ref(o);
    c = CONNECTION(o->userdata);
    pa_assert(c);

    return pa_bytes_to_usec(pa_memblockq_get_length(c->output_memblockq), &c->source_output->sample_spec);
}

/* Called from main thread */
static pa_bool_t source_output_may_move_to_cb(pa_source_output *o, pa_source *dest) {
    struct userdata *u;

    pa_source_output_assert_ref(o);
    pa_assert_ctl_context();
    pa_assert_se(u = o->userdata);

    return dest != u->sink_input->sink->monitor_source;
}