int cmtspeech_create_source_output(struct userdata *u)
{
    pa_source_output_new_data data;
    char t[256];

    pa_assert(u);
    pa_assert(!u->source);
    ENTER();

    if (u->source_output) {
        pa_log_info("Create called but output already exists");
        return 1;
    }

    if (!(u->source = pa_namereg_get(u->core, u->source_name, PA_NAMEREG_SOURCE))) {
        pa_log_error("Couldn't find source %s", u->source_name);
        return 2;
    }

    if (cmtspeech_check_source_api(u->source))
        return 3;

    pa_source_output_new_data_init(&data);
    data.driver = __FILE__;
    data.module = u->module;
    data.source = u->source;
    snprintf(t, sizeof(t), "Cellular call up link");
    pa_proplist_sets(data.proplist, PA_PROP_MEDIA_NAME, t);
    snprintf(t, sizeof(t), "phone");
    pa_proplist_sets(data.proplist, PA_PROP_MEDIA_ROLE, t);
    snprintf(t, sizeof(t), "cmtspeech module");
    pa_proplist_sets(data.proplist, PA_PROP_APPLICATION_NAME, t);
    pa_source_output_new_data_set_sample_spec(&data, &u->ss);
    pa_source_output_new_data_set_channel_map(&data, &u->map);
    data.flags = PA_SOURCE_OUTPUT_DONT_MOVE|PA_SOURCE_OUTPUT_START_CORKED;

    pa_source_output_new(&u->source_output, u->core, &data);
    pa_source_output_new_data_done(&data);

    if (!u->source_output) {
        pa_log("Creating cmtspeech source output failed");
        return -1;
    }

    u->source_output->push = cmtspeech_source_output_push_cb;
    u->source_output->kill = cmtspeech_source_output_kill_cb;
    u->source_output->attach = cmtspeech_source_output_attach_cb;
    u->source_output->detach = cmtspeech_source_output_detach_cb;
    u->source_output->moving = cmtspeech_source_output_moving_cb;
    u->source_output->state_change = cmtspeech_source_output_state_change_cb;
    u->source_output->may_move_to = cmtspeech_source_output_may_move_to_cb;
    u->source_output->userdata = u;

    pa_source_output_put(u->source_output);

    pa_log_info("cmtspeech source-output created");

    return 0;
}
int pa__init(pa_module *m) {
    pa_modargs *ma = NULL;
    struct userdata *u;
    pa_sink *sink = NULL;
    pa_sink_input_new_data sink_input_data;
    pa_bool_t sink_dont_move;
    pa_source *source = NULL;
    pa_source_output_new_data source_output_data;
    pa_bool_t source_dont_move;
    uint32_t latency_msec;
    pa_sample_spec ss;
    pa_channel_map map;
    bool format_set = false;
    bool rate_set = false;
    bool channels_set = false;
    pa_memchunk silence;
    uint32_t adjust_time_sec;
    const char *n;
    pa_bool_t remix = TRUE;

    pa_assert(m);

    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
        pa_log("Failed to parse module arguments");
        goto fail;
    }

    n = pa_modargs_get_value(ma, "source", NULL);
    if (n && !(source = pa_namereg_get(m->core, n, PA_NAMEREG_SOURCE))) {
        pa_log("No such source.");
        goto fail;
    }

    n = pa_modargs_get_value(ma, "sink", NULL);
    if (n && !(sink = pa_namereg_get(m->core, n, PA_NAMEREG_SINK))) {
        pa_log("No such sink.");
        goto fail;
    }

    if (pa_modargs_get_value_boolean(ma, "remix", &remix) < 0) {
        pa_log("Invalid boolean remix parameter");
        goto fail;
    }

    if (sink) {
        ss = sink->sample_spec;
        map = sink->channel_map;
        format_set = true;
        rate_set = true;
        channels_set = true;
    } else if (source) {
        ss = source->sample_spec;
        map = source->channel_map;
        format_set = true;
        rate_set = true;
        channels_set = true;
    } else {
        /* FIXME: Dummy stream format, needed because pa_sink_input_new()
         * requires valid sample spec and channel map even when all the FIX_*
         * stream flags are specified. pa_sink_input_new() should be changed
         * to ignore the sample spec and channel map when the FIX_* flags are
         * present. */
        ss.format = PA_SAMPLE_U8;
        ss.rate = 8000;
        ss.channels = 1;
        map.channels = 1;
        map.map[0] = PA_CHANNEL_POSITION_MONO;
    }

    if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
        pa_log("Invalid sample format specification or channel map");
        goto fail;
    }

    if (pa_modargs_get_value(ma, "format", NULL))
        format_set = true;

    if (pa_modargs_get_value(ma, "rate", NULL))
        rate_set = true;

    if (pa_modargs_get_value(ma, "channels", NULL) || pa_modargs_get_value(ma, "channel_map", NULL))
        channels_set = true;

    latency_msec = DEFAULT_LATENCY_MSEC;
    if (pa_modargs_get_value_u32(ma, "latency_msec", &latency_msec) < 0 || latency_msec < 1 || latency_msec > 2000) {
        pa_log("Invalid latency specification");
        goto fail;
    }

    m->userdata = u = pa_xnew0(struct userdata, 1);
    u->core = m->core;
    u->module = m;
    u->latency = (pa_usec_t) latency_msec * PA_USEC_PER_MSEC;

    adjust_time_sec = DEFAULT_ADJUST_TIME_USEC / PA_USEC_PER_SEC;
    if (pa_modargs_get_value_u32(ma, "adjust_time", &adjust_time_sec) < 0) {
        pa_log("Failed to parse adjust_time value");
        goto fail;
    }

    if (adjust_time_sec != DEFAULT_ADJUST_TIME_USEC / PA_USEC_PER_SEC)
        u->adjust_time = adjust_time_sec * PA_USEC_PER_SEC;
    else
        u->adjust_time = DEFAULT_ADJUST_TIME_USEC;

    pa_sink_input_new_data_init(&sink_input_data);
    sink_input_data.driver = __FILE__;
    sink_input_data.module = m;

    if (sink)
        pa_sink_input_new_data_set_sink(&sink_input_data, sink, FALSE);

    if (pa_modargs_get_proplist(ma, "sink_input_properties", sink_input_data.proplist, PA_UPDATE_REPLACE) < 0) {
        pa_log("Failed to parse the sink_input_properties value.");
        pa_sink_input_new_data_done(&sink_input_data);
        goto fail;
    }

    if (!pa_proplist_contains(sink_input_data.proplist, PA_PROP_MEDIA_ROLE))
        pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "abstract");

    pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
    pa_sink_input_new_data_set_channel_map(&sink_input_data, &map);
    sink_input_data.flags = PA_SINK_INPUT_VARIABLE_RATE | PA_SINK_INPUT_START_CORKED;

    if (!remix)
        sink_input_data.flags |= PA_SINK_INPUT_NO_REMIX;

    if (!format_set)
        sink_input_data.flags |= PA_SINK_INPUT_FIX_FORMAT;

    if (!rate_set)
        sink_input_data.flags |= PA_SINK_INPUT_FIX_RATE;

    if (!channels_set)
        sink_input_data.flags |= PA_SINK_INPUT_FIX_CHANNELS;

    sink_dont_move = FALSE;
    if (pa_modargs_get_value_boolean(ma, "sink_dont_move", &sink_dont_move) < 0) {
        pa_log("sink_dont_move= expects a boolean argument.");
        goto fail;
    }

    if (sink_dont_move)
        sink_input_data.flags |= PA_SINK_INPUT_DONT_MOVE;

    pa_sink_input_new(&u->sink_input, m->core, &sink_input_data);
    pa_sink_input_new_data_done(&sink_input_data);

    if (!u->sink_input)
        goto fail;

    /* If format, rate or channels were originally unset, they are set now
     * after the pa_sink_input_new() call. */
    ss = u->sink_input->sample_spec;
    map = u->sink_input->channel_map;

    u->sink_input->parent.process_msg = sink_input_process_msg_cb;
    u->sink_input->pop = sink_input_pop_cb;
    u->sink_input->process_rewind = sink_input_process_rewind_cb;
    u->sink_input->kill = sink_input_kill_cb;
    u->sink_input->state_change = sink_input_state_change_cb;
    u->sink_input->attach = sink_input_attach_cb;
    u->sink_input->detach = sink_input_detach_cb;
    u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
    u->sink_input->update_max_request = sink_input_update_max_request_cb;
    u->sink_input->may_move_to = sink_input_may_move_to_cb;
    u->sink_input->moving = sink_input_moving_cb;
    u->sink_input->suspend = sink_input_suspend_cb;
    u->sink_input->userdata = u;

    pa_sink_input_set_requested_latency(u->sink_input, u->latency/3);

    pa_source_output_new_data_init(&source_output_data);
    source_output_data.driver = __FILE__;
    source_output_data.module = m;
    if (source)
        pa_source_output_new_data_set_source(&source_output_data, source, FALSE);

    if (pa_modargs_get_proplist(ma, "source_output_properties", source_output_data.proplist, PA_UPDATE_REPLACE) < 0) {
        pa_log("Failed to parse the source_output_properties value.");
        pa_source_output_new_data_done(&source_output_data);
        goto fail;
    }

    if (!pa_proplist_contains(source_output_data.proplist, PA_PROP_MEDIA_ROLE))
        pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ROLE, "abstract");

    pa_source_output_new_data_set_sample_spec(&source_output_data, &ss);
    pa_source_output_new_data_set_channel_map(&source_output_data, &map);
    source_output_data.flags = PA_SOURCE_OUTPUT_START_CORKED;

    if (!remix)
        source_output_data.flags |= PA_SOURCE_OUTPUT_NO_REMIX;

    source_dont_move = FALSE;
    if (pa_modargs_get_value_boolean(ma, "source_dont_move", &source_dont_move) < 0) {
        pa_log("source_dont_move= expects a boolean argument.");
        goto fail;
    }

    if (source_dont_move)
        source_output_data.flags |= PA_SOURCE_OUTPUT_DONT_MOVE;

    pa_source_output_new(&u->source_output, m->core, &source_output_data);
    pa_source_output_new_data_done(&source_output_data);

    if (!u->source_output)
        goto fail;

    u->source_output->parent.process_msg = source_output_process_msg_cb;
    u->source_output->push = source_output_push_cb;
    u->source_output->process_rewind = source_output_process_rewind_cb;
    u->source_output->kill = source_output_kill_cb;
    u->source_output->attach = source_output_attach_cb;
    u->source_output->detach = source_output_detach_cb;
    u->source_output->state_change = source_output_state_change_cb;
    u->source_output->may_move_to = source_output_may_move_to_cb;
    u->source_output->moving = source_output_moving_cb;
    u->source_output->suspend = source_output_suspend_cb;
    u->source_output->userdata = u;

    pa_source_output_set_requested_latency(u->source_output, u->latency/3);

    pa_sink_input_get_silence(u->sink_input, &silence);
    u->memblockq = pa_memblockq_new(
            "module-loopback memblockq",
            0,                      /* idx */
            MEMBLOCKQ_MAXLENGTH,    /* maxlength */
            MEMBLOCKQ_MAXLENGTH,    /* tlength */
            &ss,                    /* sample_spec */
            0,                      /* prebuf */
            0,                      /* minreq */
            0,                      /* maxrewind */
            &silence);              /* silence frame */
    pa_memblock_unref(silence.memblock);

    u->asyncmsgq = pa_asyncmsgq_new(0);

    if (!pa_proplist_contains(u->source_output->proplist, PA_PROP_MEDIA_NAME))
        pa_proplist_setf(u->source_output->proplist, PA_PROP_MEDIA_NAME, "Loopback to %s",
                         pa_strnull(pa_proplist_gets(u->sink_input->sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));

    if (!pa_proplist_contains(u->source_output->proplist, PA_PROP_MEDIA_ICON_NAME)
            && (n = pa_proplist_gets(u->sink_input->sink->proplist, PA_PROP_DEVICE_ICON_NAME)))
        pa_proplist_sets(u->source_output->proplist, PA_PROP_MEDIA_ICON_NAME, n);

    if (!pa_proplist_contains(u->sink_input->proplist, PA_PROP_MEDIA_NAME))
        pa_proplist_setf(u->sink_input->proplist, PA_PROP_MEDIA_NAME, "Loopback from %s",
                         pa_strnull(pa_proplist_gets(u->source_output->source->proplist, PA_PROP_DEVICE_DESCRIPTION)));

    if (source && !pa_proplist_contains(u->sink_input->proplist, PA_PROP_MEDIA_ICON_NAME)
            && (n = pa_proplist_gets(u->source_output->source->proplist, PA_PROP_DEVICE_ICON_NAME)))
        pa_proplist_sets(u->sink_input->proplist, PA_PROP_MEDIA_ICON_NAME, n);

    pa_sink_input_put(u->sink_input);
    pa_source_output_put(u->source_output);

    if (pa_source_get_state(u->source_output->source) != PA_SOURCE_SUSPENDED)
	    pa_sink_input_cork(u->sink_input, FALSE);

    if (pa_sink_get_state(u->sink_input->sink) != PA_SINK_SUSPENDED)
	    pa_source_output_cork(u->source_output, FALSE);

    update_adjust_timer(u);

    pa_modargs_free(ma);
    return 0;

fail:
    if (ma)
        pa_modargs_free(ma);

    pa__done(m);

    return -1;
}
int pa__init(pa_module*m) {
    struct userdata *u;
    pa_sample_spec ss;
    pa_channel_map source_map, stream_map;
    pa_modargs *ma;
    pa_source *master;
    pa_source_output_new_data source_output_data;
    pa_source_new_data source_data;
    bool remix = true;

    pa_assert(m);

    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
        pa_log("Failed to parse module arguments.");
        goto fail;
    }

    if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SOURCE))) {
        pa_log("Master source not found.");
        goto fail;
    }

    ss = master->sample_spec;
    source_map = master->channel_map;
    if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &source_map, PA_CHANNEL_MAP_DEFAULT) < 0) {
        pa_log("Invalid sample format specification or channel map.");
        goto fail;
    }

    stream_map = source_map;
    if (pa_modargs_get_channel_map(ma, "master_channel_map", &stream_map) < 0) {
        pa_log("Invalid master channel map.");
        goto fail;
    }

    if (stream_map.channels != ss.channels) {
        pa_log("Number of channels doesn't match.");
        goto fail;
    }

    if (pa_channel_map_equal(&stream_map, &master->channel_map))
        pa_log_warn("No remapping configured, proceeding nonetheless!");

    if (pa_modargs_get_value_boolean(ma, "remix", &remix) < 0) {
        pa_log("Invalid boolean remix parameter.");
        goto fail;
    }

    u = pa_xnew0(struct userdata, 1);
    u->module = m;
    m->userdata = u;

    /* Create source */
    pa_source_new_data_init(&source_data);
    source_data.driver = __FILE__;
    source_data.module = m;
    if (!(source_data.name = pa_xstrdup(pa_modargs_get_value(ma, "source_name", NULL))))
        source_data.name = pa_sprintf_malloc("%s.remapped", master->name);
    pa_source_new_data_set_sample_spec(&source_data, &ss);
    pa_source_new_data_set_channel_map(&source_data, &source_map);
    pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
    pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_CLASS, "filter");

    if (pa_modargs_get_proplist(ma, "source_properties", source_data.proplist, PA_UPDATE_REPLACE) < 0) {
        pa_log("Invalid properties.");
        pa_source_new_data_done(&source_data);
        goto fail;
    }

    if ((u->auto_desc = !pa_proplist_contains(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION))) {
        const char *k;

        k = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
        pa_proplist_setf(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : master->name);
    }

    u->source = pa_source_new(m->core, &source_data, master->flags & (PA_SOURCE_LATENCY|PA_SOURCE_DYNAMIC_LATENCY));
    pa_source_new_data_done(&source_data);

    if (!u->source) {
        pa_log("Failed to create source.");
        goto fail;
    }

    u->source->parent.process_msg = source_process_msg_cb;
    u->source->set_state = source_set_state_cb;
    u->source->update_requested_latency = source_update_requested_latency_cb;

    u->source->userdata = u;

    pa_source_set_asyncmsgq(u->source, master->asyncmsgq);

    /* Create source output */
    pa_source_output_new_data_init(&source_output_data);
    source_output_data.driver = __FILE__;
    source_output_data.module = m;
    pa_source_output_new_data_set_source(&source_output_data, master, false);
    source_output_data.destination_source = u->source;

    pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_NAME, "Remapped Stream");
    pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
    pa_source_output_new_data_set_sample_spec(&source_output_data, &ss);
    pa_source_output_new_data_set_channel_map(&source_output_data, &stream_map);
    source_output_data.flags = remix ? 0 : PA_SOURCE_OUTPUT_NO_REMIX;

    pa_source_output_new(&u->source_output, m->core, &source_output_data);
    pa_source_output_new_data_done(&source_output_data);

    if (!u->source_output)
        goto fail;

    u->source_output->push = source_output_push_cb;
    u->source_output->process_rewind = source_output_process_rewind_cb;
    u->source_output->kill = source_output_kill_cb;
    u->source_output->attach = source_output_attach_cb;
    u->source_output->detach = source_output_detach_cb;
    u->source_output->state_change = source_output_state_change_cb;
    u->source_output->moving = source_output_moving_cb;
    u->source_output->userdata = u;

    u->source->output_from_master = u->source_output;

    pa_source_put(u->source);
    pa_source_output_put(u->source_output);

    pa_modargs_free(ma);

    return 0;

fail:
    if (ma)
        pa_modargs_free(ma);

    pa__done(m);

    return -1;
}
Ejemplo n.º 4
0
int pa__init(pa_module*m) {
    struct userdata *u;
    pa_modargs *ma = NULL;
    const char *dst_addr;
    const char *src_addr;
    uint32_t port = DEFAULT_PORT, mtu;
    uint32_t ttl = DEFAULT_TTL;
    sa_family_t af;
    int fd = -1, sap_fd = -1;
    pa_source *s;
    pa_sample_spec ss;
    pa_channel_map cm;
    struct sockaddr_in dst_sa4, dst_sap_sa4, src_sa4, src_sap_sa4;
#ifdef HAVE_IPV6
    struct sockaddr_in6 dst_sa6, dst_sap_sa6, src_sa6, src_sap_sa6;
#endif
    struct sockaddr_storage sa_dst;
    pa_source_output *o = NULL;
    uint8_t payload;
    char *p;
    int r, j;
    socklen_t k;
    char hn[128], *n;
    bool loop = false;
    enum inhibit_auto_suspend inhibit_auto_suspend = INHIBIT_AUTO_SUSPEND_ONLY_WITH_NON_MONITOR_SOURCES;
    const char *inhibit_auto_suspend_str;
    pa_source_output_new_data data;

    pa_assert(m);

    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
        pa_log("Failed to parse module arguments");
        goto fail;
    }

    if (!(s = pa_namereg_get(m->core, pa_modargs_get_value(ma, "source", NULL), PA_NAMEREG_SOURCE))) {
        pa_log("Source does not exist.");
        goto fail;
    }

    if (pa_modargs_get_value_boolean(ma, "loop", &loop) < 0) {
        pa_log("Failed to parse \"loop\" parameter.");
        goto fail;
    }

    if ((inhibit_auto_suspend_str = pa_modargs_get_value(ma, "inhibit_auto_suspend", NULL))) {
        if (pa_streq(inhibit_auto_suspend_str, "always"))
            inhibit_auto_suspend = INHIBIT_AUTO_SUSPEND_ALWAYS;
        else if (pa_streq(inhibit_auto_suspend_str, "never"))
            inhibit_auto_suspend = INHIBIT_AUTO_SUSPEND_NEVER;
        else if (pa_streq(inhibit_auto_suspend_str, "only_with_non_monitor_sources"))
            inhibit_auto_suspend = INHIBIT_AUTO_SUSPEND_ONLY_WITH_NON_MONITOR_SOURCES;
        else {
            pa_log("Failed to parse the \"inhibit_auto_suspend\" parameter.");
            goto fail;
        }
    }

    ss = s->sample_spec;
    pa_rtp_sample_spec_fixup(&ss);
    cm = s->channel_map;
    if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
        pa_log("Failed to parse sample specification");
        goto fail;
    }

    if (!pa_rtp_sample_spec_valid(&ss)) {
        pa_log("Specified sample type not compatible with RTP");
        goto fail;
    }

    if (ss.channels != cm.channels)
        pa_channel_map_init_auto(&cm, ss.channels, PA_CHANNEL_MAP_AIFF);

    payload = pa_rtp_payload_from_sample_spec(&ss);

    mtu = (uint32_t) pa_frame_align(DEFAULT_MTU, &ss);

    if (pa_modargs_get_value_u32(ma, "mtu", &mtu) < 0 || mtu < 1 || mtu % pa_frame_size(&ss) != 0) {
        pa_log("Invalid MTU.");
        goto fail;
    }

    port = DEFAULT_PORT + ((uint32_t) (rand() % 512) << 1);
    if (pa_modargs_get_value_u32(ma, "port", &port) < 0 || port < 1 || port > 0xFFFF) {
        pa_log("port= expects a numerical argument between 1 and 65535.");
        goto fail;
    }

    if (port & 1)
        pa_log_warn("Port number not even as suggested in RFC3550!");

    if (pa_modargs_get_value_u32(ma, "ttl", &ttl) < 0 || ttl < 1 || ttl > 0xFF) {
        pa_log("ttl= expects a numerical argument between 1 and 255.");
        goto fail;
    }

    src_addr = pa_modargs_get_value(ma, "source_ip", DEFAULT_SOURCE_IP);

    if (inet_pton(AF_INET, src_addr, &src_sa4.sin_addr) > 0) {
        src_sa4.sin_family = af = AF_INET;
        src_sa4.sin_port = htons(0);
        memset(&src_sa4.sin_zero, 0, sizeof(src_sa4.sin_zero));
        src_sap_sa4 = src_sa4;
#ifdef HAVE_IPV6
    } else if (inet_pton(AF_INET6, src_addr, &src_sa6.sin6_addr) > 0) {
        src_sa6.sin6_family = af = AF_INET6;
        src_sa6.sin6_port = htons(0);
        src_sa6.sin6_flowinfo = 0;
        src_sa6.sin6_scope_id = 0;
        src_sap_sa6 = src_sa6;
#endif
    } else {
        pa_log("Invalid source address '%s'", src_addr);
        goto fail;
    }

    dst_addr = pa_modargs_get_value(ma, "destination", NULL);
    if (dst_addr == NULL)
        dst_addr = pa_modargs_get_value(ma, "destination_ip", DEFAULT_DESTINATION_IP);

    if (inet_pton(AF_INET, dst_addr, &dst_sa4.sin_addr) > 0) {
        dst_sa4.sin_family = af = AF_INET;
        dst_sa4.sin_port = htons((uint16_t) port);
        memset(&dst_sa4.sin_zero, 0, sizeof(dst_sa4.sin_zero));
        dst_sap_sa4 = dst_sa4;
        dst_sap_sa4.sin_port = htons(SAP_PORT);
#ifdef HAVE_IPV6
    } else if (inet_pton(AF_INET6, dst_addr, &dst_sa6.sin6_addr) > 0) {
        dst_sa6.sin6_family = af = AF_INET6;
        dst_sa6.sin6_port = htons((uint16_t) port);
        dst_sa6.sin6_flowinfo = 0;
        dst_sa6.sin6_scope_id = 0;
        dst_sap_sa6 = dst_sa6;
        dst_sap_sa6.sin6_port = htons(SAP_PORT);
#endif
    } else {
        pa_log("Invalid destination '%s'", dst_addr);
        goto fail;
    }

    if ((fd = pa_socket_cloexec(af, SOCK_DGRAM, 0)) < 0) {
        pa_log("socket() failed: %s", pa_cstrerror(errno));
        goto fail;
    }

    if (af == AF_INET && bind(fd, (struct sockaddr*) &src_sa4, sizeof(src_sa4)) < 0) {
        pa_log("bind() failed: %s", pa_cstrerror(errno));
        goto fail;
#ifdef HAVE_IPV6
    } else if (af == AF_INET6 && bind(fd, (struct sockaddr*) &src_sa6, sizeof(src_sa6)) < 0) {
        pa_log("bind() failed: %s", pa_cstrerror(errno));
        goto fail;
#endif
    }

    if (af == AF_INET && connect(fd, (struct sockaddr*) &dst_sa4, sizeof(dst_sa4)) < 0) {
        pa_log("connect() failed: %s", pa_cstrerror(errno));
        goto fail;
#ifdef HAVE_IPV6
    } else if (af == AF_INET6 && connect(fd, (struct sockaddr*) &dst_sa6, sizeof(dst_sa6)) < 0) {
        pa_log("connect() failed: %s", pa_cstrerror(errno));
        goto fail;
#endif
    }

    if ((sap_fd = pa_socket_cloexec(af, SOCK_DGRAM, 0)) < 0) {
        pa_log("socket() failed: %s", pa_cstrerror(errno));
        goto fail;
    }

    if (af == AF_INET && bind(sap_fd, (struct sockaddr*) &src_sap_sa4, sizeof(src_sap_sa4)) < 0) {
        pa_log("bind() failed: %s", pa_cstrerror(errno));
        goto fail;
#ifdef HAVE_IPV6
    } else if (af == AF_INET6 && bind(sap_fd, (struct sockaddr*) &src_sap_sa6, sizeof(src_sap_sa6)) < 0) {
        pa_log("bind() failed: %s", pa_cstrerror(errno));
        goto fail;
#endif
    }

    if (af == AF_INET && connect(sap_fd, (struct sockaddr*) &dst_sap_sa4, sizeof(dst_sap_sa4)) < 0) {
        pa_log("connect() failed: %s", pa_cstrerror(errno));
        goto fail;
#ifdef HAVE_IPV6
    } else if (af == AF_INET6 && connect(sap_fd, (struct sockaddr*) &dst_sap_sa6, sizeof(dst_sap_sa6)) < 0) {
        pa_log("connect() failed: %s", pa_cstrerror(errno));
        goto fail;
#endif
    }

    j = loop;
    if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &j, sizeof(j)) < 0 ||
        setsockopt(sap_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &j, sizeof(j)) < 0) {
        pa_log("IP_MULTICAST_LOOP failed: %s", pa_cstrerror(errno));
        goto fail;
    }

    if (ttl != DEFAULT_TTL) {
        int _ttl = (int) ttl;

        if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &_ttl, sizeof(_ttl)) < 0) {
            pa_log("IP_MULTICAST_TTL failed: %s", pa_cstrerror(errno));
            goto fail;
        }

        if (setsockopt(sap_fd, IPPROTO_IP, IP_MULTICAST_TTL, &_ttl, sizeof(_ttl)) < 0) {
            pa_log("IP_MULTICAST_TTL (sap) failed: %s", pa_cstrerror(errno));
            goto fail;
        }
    }

    /* If the socket queue is full, let's drop packets */
    pa_make_fd_nonblock(fd);
    pa_make_udp_socket_low_delay(fd);

    pa_source_output_new_data_init(&data);
    pa_proplist_sets(data.proplist, PA_PROP_MEDIA_NAME, "RTP Monitor Stream");
    pa_proplist_sets(data.proplist, "rtp.source", src_addr);
    pa_proplist_sets(data.proplist, "rtp.destination", dst_addr);
    pa_proplist_setf(data.proplist, "rtp.mtu", "%lu", (unsigned long) mtu);
    pa_proplist_setf(data.proplist, "rtp.port", "%lu", (unsigned long) port);
    pa_proplist_setf(data.proplist, "rtp.ttl", "%lu", (unsigned long) ttl);
    data.driver = __FILE__;
    data.module = m;
    pa_source_output_new_data_set_source(&data, s, false, true);
    pa_source_output_new_data_set_sample_spec(&data, &ss);
    pa_source_output_new_data_set_channel_map(&data, &cm);
    data.flags |= get_dont_inhibit_auto_suspend_flag(s, inhibit_auto_suspend);

    pa_source_output_new(&o, m->core, &data);
    pa_source_output_new_data_done(&data);

    if (!o) {
        pa_log("failed to create source output.");
        goto fail;
    }

    o->parent.process_msg = source_output_process_msg;
    o->push = source_output_push_cb;
    o->moving = source_output_moving_cb;
    o->kill = source_output_kill_cb;

    pa_log_info("Configured source latency of %llu ms.",
                (unsigned long long) pa_source_output_set_requested_latency(o, pa_bytes_to_usec(mtu, &o->sample_spec)) / PA_USEC_PER_MSEC);

    m->userdata = o->userdata = u = pa_xnew(struct userdata, 1);
    u->module = m;
    u->source_output = o;

    u->memblockq = pa_memblockq_new(
            "module-rtp-send memblockq",
            0,
            MEMBLOCKQ_MAXLENGTH,
            MEMBLOCKQ_MAXLENGTH,
            &ss,
            1,
            0,
            0,
            NULL);

    u->mtu = mtu;

    k = sizeof(sa_dst);
    pa_assert_se((r = getsockname(fd, (struct sockaddr*) &sa_dst, &k)) >= 0);

    n = pa_xstrdup(pa_modargs_get_value(ma, "stream_name", NULL));
    if (n == NULL)
        n = pa_sprintf_malloc("PulseAudio RTP Stream on %s", pa_get_fqdn(hn, sizeof(hn)));

    if (af == AF_INET) {
        p = pa_sdp_build(af,
                     (void*) &((struct sockaddr_in*) &sa_dst)->sin_addr,
                     (void*) &dst_sa4.sin_addr,
                     n, (uint16_t) port, payload, &ss);
#ifdef HAVE_IPV6
    } else {
        p = pa_sdp_build(af,
                     (void*) &((struct sockaddr_in6*) &sa_dst)->sin6_addr,
                     (void*) &dst_sa6.sin6_addr,
                     n, (uint16_t) port, payload, &ss);
#endif
    }

    pa_xfree(n);

    pa_rtp_context_init_send(&u->rtp_context, fd, m->core->cookie, payload, pa_frame_size(&ss));
    pa_sap_context_init_send(&u->sap_context, sap_fd, p);

    pa_log_info("RTP stream initialized with mtu %u on %s:%u from %s ttl=%u, SSRC=0x%08x, payload=%u, initial sequence #%u", mtu, dst_addr, port, src_addr, ttl, u->rtp_context.ssrc, payload, u->rtp_context.sequence);
    pa_log_info("SDP-Data:\n%s\nEOF", p);

    pa_sap_send(&u->sap_context, 0);

    u->sap_event = pa_core_rttime_new(m->core, pa_rtclock_now() + SAP_INTERVAL, sap_event_cb, u);
    u->inhibit_auto_suspend = inhibit_auto_suspend;

    pa_source_output_put(u->source_output);

    pa_modargs_free(ma);

    return 0;

fail:
    if (ma)
        pa_modargs_free(ma);

    if (fd >= 0)
        pa_close(fd);

    if (sap_fd >= 0)
        pa_close(sap_fd);

    return -1;
}
Ejemplo n.º 5
0
int pa__init(pa_module*m) {
    struct userdata *u;
    pa_sample_spec ss;
    pa_channel_map map;
    pa_modargs *ma;
    pa_source *master=NULL;
    pa_source_output_new_data source_output_data;
    pa_source_new_data source_data;
    pa_bool_t *use_default = NULL;

    /* optional for uplink_sink */
    pa_sink_new_data sink_data;
    size_t nbytes;

    pa_assert(m);

    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
        pa_log("Failed to parse module arguments.");
        goto fail;
    }

    if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SOURCE))) {
        pa_log("Master source not found");
        goto fail;
    }

    pa_assert(master);

    ss = master->sample_spec;
    ss.format = PA_SAMPLE_FLOAT32;
    map = master->channel_map;
    if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
        pa_log("Invalid sample format specification or channel map");
        goto fail;
    }


    u = pa_xnew0(struct userdata, 1);
    if (!u) {
        pa_log("Failed to alloc userdata");
        goto fail;
    }
    u->module = m;
    m->userdata = u;
    u->memblockq = pa_memblockq_new(0, MEMBLOCKQ_MAXLENGTH, 0, pa_frame_size(&ss), 1, 1, 0, NULL);
    if (!u->memblockq) {
        pa_log("Failed to create source memblockq.");
        goto fail;
    }
    u->channels = ss.channels;

    /* Create source */
    pa_source_new_data_init(&source_data);
    source_data.driver = __FILE__;
    source_data.module = m;
    if (!(source_data.name = pa_xstrdup(pa_modargs_get_value(ma, "source_name", NULL))))
        source_data.name = pa_sprintf_malloc("%s.vsource", master->name);
    pa_source_new_data_set_sample_spec(&source_data, &ss);
    pa_source_new_data_set_channel_map(&source_data, &map);
    pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
    pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
    pa_proplist_sets(source_data.proplist, "device.vsource.name", source_data.name);

    if (pa_modargs_get_proplist(ma, "source_properties", source_data.proplist, PA_UPDATE_REPLACE) < 0) {
        pa_log("Invalid properties");
        pa_source_new_data_done(&source_data);
        goto fail;
    }

    if ((u->auto_desc = !pa_proplist_contains(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION))) {
        const char *z;

        z = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
        pa_proplist_setf(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Virtual Source %s on %s", source_data.name, z ? z : master->name);
    }

    u->source = pa_source_new(m->core, &source_data,
                          PA_SOURCE_HW_MUTE_CTRL|PA_SOURCE_HW_VOLUME_CTRL|PA_SOURCE_DECIBEL_VOLUME|
                          (master->flags & (PA_SOURCE_LATENCY|PA_SOURCE_DYNAMIC_LATENCY)));
    pa_source_new_data_done(&source_data);

    if (!u->source) {
        pa_log("Failed to create source.");
        goto fail;
    }

    u->source->parent.process_msg = source_process_msg_cb;
    u->source->set_state = source_set_state_cb;
    u->source->update_requested_latency = source_update_requested_latency_cb;
    u->source->set_volume = source_set_volume_cb;
    u->source->set_mute = source_set_mute_cb;
    u->source->get_volume = source_get_volume_cb;
    u->source->get_mute = source_get_mute_cb;
    u->source->userdata = u;

    pa_source_set_asyncmsgq(u->source, master->asyncmsgq);

    /* Create source output */
    pa_source_output_new_data_init(&source_output_data);
    source_output_data.driver = __FILE__;
    source_output_data.module = m;
    source_output_data.source = master;
    /* FIXME
       source_output_data.flags = PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND; */

    pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_NAME, "Virtual Source Stream");
    pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
    pa_source_output_new_data_set_sample_spec(&source_output_data, &ss);
    pa_source_output_new_data_set_channel_map(&source_output_data, &map);

    pa_source_output_new(&u->source_output, m->core, &source_output_data);
    pa_source_output_new_data_done(&source_output_data);

    if (!u->source_output)
        goto fail;

    u->source_output->parent.process_msg = source_output_process_msg_cb;
    u->source_output->push = source_output_push_cb;
    u->source_output->process_rewind = source_output_process_rewind_cb;
    u->source_output->kill = source_output_kill_cb;
    u->source_output->attach = source_output_attach_cb;
    u->source_output->detach = source_output_detach_cb;
    u->source_output->state_change = source_output_state_change_cb;
    u->source_output->may_move_to = source_output_may_move_to_cb;
    u->source_output->moving = source_output_moving_cb;
    u->source_output->userdata = u;

    pa_source_put(u->source);
    pa_source_output_put(u->source_output);

    /* Create optional uplink sink */
    pa_sink_new_data_init(&sink_data);
    sink_data.driver = __FILE__;
    sink_data.module = m;
    if ((sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "uplink_sink", NULL)))) {
        pa_sink_new_data_set_sample_spec(&sink_data, &ss);
        pa_sink_new_data_set_channel_map(&sink_data, &map);
        pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
        pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_CLASS, "uplink sink");
        pa_proplist_sets(sink_data.proplist, "device.uplink_sink.name", sink_data.name);

        if ((u->auto_desc = !pa_proplist_contains(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION))) {
            const char *z;

            z = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
            pa_proplist_setf(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Uplink Sink %s on %s", sink_data.name, z ? z : master->name);
        }

        u->sink_memblockq = pa_memblockq_new(0, MEMBLOCKQ_MAXLENGTH, 0, pa_frame_size(&ss), 1, 1, 0, NULL);
        if (!u->sink_memblockq) {
            pa_log("Failed to create sink memblockq.");
            goto fail;
        }

        u->sink = pa_sink_new(m->core, &sink_data, 0);  /* FIXME, sink has no capabilities */
        pa_sink_new_data_done(&sink_data);

        if (!u->sink) {
            pa_log("Failed to create sink.");
            goto fail;
        }

        u->sink->parent.process_msg = sink_process_msg_cb;
        u->sink->update_requested_latency = sink_update_requested_latency_cb;
        u->sink->request_rewind = sink_request_rewind_cb;
        u->sink->set_state = sink_set_state_cb;
        u->sink->userdata = u;

        pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq);

        /* FIXME: no idea what I am doing here */
        u->block_usec = BLOCK_USEC;
        nbytes = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
        pa_sink_set_max_rewind(u->sink, nbytes);
        pa_sink_set_max_request(u->sink, nbytes);

        pa_sink_put(u->sink);
    } else {
        /* optional uplink sink not enabled */
        u->sink = NULL;
    }

    pa_modargs_free(ma);

    pa_xfree(use_default);

    return 0;

 fail:
    if (ma)
        pa_modargs_free(ma);

    pa_xfree(use_default);

    pa__done(m);

    return -1;
}
Ejemplo n.º 6
0
void pa_simple_protocol_connect(pa_simple_protocol *p, pa_iochannel *io, pa_simple_options *o) {
    connection *c = NULL;
    char pname[128];
    pa_client_new_data client_data;

    pa_assert(p);
    pa_assert(io);
    pa_assert(o);

    if (pa_idxset_size(p->connections)+1 > MAX_CONNECTIONS) {
        pa_log("Warning! Too many connections (%u), dropping incoming connection.", MAX_CONNECTIONS);
        pa_iochannel_free(io);
        return;
    }

    c = pa_msgobject_new(connection);
    c->parent.parent.free = connection_free;
    c->parent.process_msg = connection_process_msg;
    c->io = io;
    pa_iochannel_set_callback(c->io, io_callback, c);

    c->sink_input = NULL;
    c->source_output = NULL;
    c->input_memblockq = c->output_memblockq = NULL;
    c->protocol = p;
    c->options = pa_simple_options_ref(o);
    c->playback.current_memblock = NULL;
    c->playback.memblock_index = 0;
    c->dead = false;
    c->playback.underrun = true;
    pa_atomic_store(&c->playback.missing, 0);

    pa_client_new_data_init(&client_data);
    client_data.module = o->module;
    client_data.driver = __FILE__;
    pa_iochannel_socket_peer_to_string(io, pname, sizeof(pname));
    pa_proplist_setf(client_data.proplist, PA_PROP_APPLICATION_NAME, "Simple client (%s)", pname);
    pa_proplist_sets(client_data.proplist, "simple-protocol.peer", pname);
    c->client = pa_client_new(p->core, &client_data);
    pa_client_new_data_done(&client_data);

    if (!c->client)
        goto fail;

    c->client->kill = client_kill_cb;
    c->client->userdata = c;

    if (o->playback) {
        pa_sink_input_new_data data;
        pa_memchunk silence;
        size_t l;
        pa_sink *sink;

        if (!(sink = pa_namereg_get(c->protocol->core, o->default_sink, PA_NAMEREG_SINK))) {
            pa_log("Failed to get sink.");
            goto fail;
        }

        pa_sink_input_new_data_init(&data);
        data.driver = __FILE__;
        data.module = o->module;
        data.client = c->client;
        pa_sink_input_new_data_set_sink(&data, sink, false);
        pa_proplist_update(data.proplist, PA_UPDATE_MERGE, c->client->proplist);
        pa_sink_input_new_data_set_sample_spec(&data, &o->sample_spec);

        pa_sink_input_new(&c->sink_input, p->core, &data);
        pa_sink_input_new_data_done(&data);

        if (!c->sink_input) {
            pa_log("Failed to create sink input.");
            goto fail;
        }

        c->sink_input->parent.process_msg = sink_input_process_msg;
        c->sink_input->pop = sink_input_pop_cb;
        c->sink_input->process_rewind = sink_input_process_rewind_cb;
        c->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
        c->sink_input->kill = sink_input_kill_cb;
        c->sink_input->userdata = c;

        pa_sink_input_set_requested_latency(c->sink_input, DEFAULT_SINK_LATENCY);

        l = (size_t) ((double) pa_bytes_per_second(&o->sample_spec)*PLAYBACK_BUFFER_SECONDS);
        pa_sink_input_get_silence(c->sink_input, &silence);
        c->input_memblockq = pa_memblockq_new(
                "simple protocol connection input_memblockq",
                0,
                l,
                l,
                &o->sample_spec,
                (size_t) -1,
                l/PLAYBACK_BUFFER_FRAGMENTS,
                0,
                &silence);
        pa_memblock_unref(silence.memblock);

        pa_iochannel_socket_set_rcvbuf(io, l);

        pa_atomic_store(&c->playback.missing, (int) pa_memblockq_pop_missing(c->input_memblockq));

        pa_sink_input_put(c->sink_input);
    }

    if (o->record) {
        pa_source_output_new_data data;
        size_t l;
        pa_source *source;

        if (!(source = pa_namereg_get(c->protocol->core, o->default_source, PA_NAMEREG_SOURCE))) {
            pa_log("Failed to get source.");
            goto fail;
        }

        pa_source_output_new_data_init(&data);
        data.driver = __FILE__;
        data.module = o->module;
        data.client = c->client;
        pa_source_output_new_data_set_source(&data, source, false);
        pa_proplist_update(data.proplist, PA_UPDATE_MERGE, c->client->proplist);
        pa_source_output_new_data_set_sample_spec(&data, &o->sample_spec);

        pa_source_output_new(&c->source_output, p->core, &data);
        pa_source_output_new_data_done(&data);

        if (!c->source_output) {
            pa_log("Failed to create source output.");
            goto fail;
        }
        c->source_output->push = source_output_push_cb;
        c->source_output->kill = source_output_kill_cb;
        c->source_output->get_latency = source_output_get_latency_cb;
        c->source_output->userdata = c;

        pa_source_output_set_requested_latency(c->source_output, DEFAULT_SOURCE_LATENCY);

        l = (size_t) (pa_bytes_per_second(&o->sample_spec)*RECORD_BUFFER_SECONDS);
        c->output_memblockq = pa_memblockq_new(
                "simple protocol connection output_memblockq",
                0,
                l,
                0,
                &o->sample_spec,
                1,
                0,
                0,
                NULL);
        pa_iochannel_socket_set_sndbuf(io, l);

        pa_source_output_put(c->source_output);
    }

    pa_idxset_put(p->connections, c, NULL);

    return;

fail:
    connection_unlink(c);
}
Ejemplo n.º 7
0
int pa__init(pa_module *m) {
    pa_modargs *ma = NULL;
    struct userdata *u;
    pa_sink *sink;
    pa_sink_input_new_data sink_input_data;
    pa_source *source;
    pa_source_output_new_data source_output_data;
    uint32_t latency_msec;
    pa_sample_spec ss;
    pa_channel_map map;
    pa_memchunk silence;
    uint32_t adjust_time_sec;
    const char *n;

    pa_assert(m);

    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
        pa_log("Failed to parse module arguments");
        goto fail;
    }

    if (!(source = pa_namereg_get(m->core, pa_modargs_get_value(ma, "source", NULL), PA_NAMEREG_SOURCE))) {
        pa_log("No such source.");
        goto fail;
    }

    if (!(sink = pa_namereg_get(m->core, pa_modargs_get_value(ma, "sink", NULL), PA_NAMEREG_SINK))) {
        pa_log("No such sink.");
        goto fail;
    }

    ss = sink->sample_spec;
    map = sink->channel_map;
    if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
        pa_log("Invalid sample format specification or channel map");
        goto fail;
    }

    latency_msec = DEFAULT_LATENCY_MSEC;
    if (pa_modargs_get_value_u32(ma, "latency_msec", &latency_msec) < 0 || latency_msec < 1 || latency_msec > 2000) {
        pa_log("Invalid latency specification");
        goto fail;
    }

    m->userdata = u = pa_xnew0(struct userdata, 1);
    u->core = m->core;
    u->module = m;
    u->latency = (pa_usec_t) latency_msec * PA_USEC_PER_MSEC;

    adjust_time_sec = DEFAULT_ADJUST_TIME_USEC / PA_USEC_PER_SEC;
    if (pa_modargs_get_value_u32(ma, "adjust_time", &adjust_time_sec) < 0) {
        pa_log("Failed to parse adjust_time value");
        goto fail;
    }

    if (adjust_time_sec != DEFAULT_ADJUST_TIME_USEC / PA_USEC_PER_SEC)
        u->adjust_time = adjust_time_sec * PA_USEC_PER_SEC;
    else
        u->adjust_time = DEFAULT_ADJUST_TIME_USEC;

    pa_sink_input_new_data_init(&sink_input_data);
    sink_input_data.driver = __FILE__;
    sink_input_data.module = m;
    sink_input_data.sink = sink;

    if ((n = pa_modargs_get_value(ma, "sink_input_name", NULL)))
        pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_NAME, n);
    else
        pa_proplist_setf(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Loopback from %s",
                         pa_strnull(pa_proplist_gets(source->proplist, PA_PROP_DEVICE_DESCRIPTION)));

    if ((n = pa_modargs_get_value(ma, "sink_input_role", NULL)))
        pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, n);
    else
        pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "abstract");

    if ((n = pa_proplist_gets(source->proplist, PA_PROP_DEVICE_ICON_NAME)))
        pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ICON_NAME, n);

    pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
    pa_sink_input_new_data_set_channel_map(&sink_input_data, &map);
    sink_input_data.flags = PA_SINK_INPUT_VARIABLE_RATE;

    pa_sink_input_new(&u->sink_input, m->core, &sink_input_data);
    pa_sink_input_new_data_done(&sink_input_data);

    if (!u->sink_input)
        goto fail;

    u->sink_input->parent.process_msg = sink_input_process_msg_cb;
    u->sink_input->pop = sink_input_pop_cb;
    u->sink_input->process_rewind = sink_input_process_rewind_cb;
    u->sink_input->kill = sink_input_kill_cb;
    u->sink_input->attach = sink_input_attach_cb;
    u->sink_input->detach = sink_input_detach_cb;
    u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
    u->sink_input->update_max_request = sink_input_update_max_request_cb;
    u->sink_input->may_move_to = sink_input_may_move_to_cb;
    u->sink_input->moving = sink_input_moving_cb;
    u->sink_input->userdata = u;

    pa_sink_input_set_requested_latency(u->sink_input, u->latency/3);

    pa_source_output_new_data_init(&source_output_data);
    source_output_data.driver = __FILE__;
    source_output_data.module = m;
    source_output_data.source = source;

    if ((n = pa_modargs_get_value(ma, "source_output_name", NULL)))
        pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_NAME, n);
    else
        pa_proplist_setf(source_output_data.proplist, PA_PROP_MEDIA_NAME, "Loopback to %s",
                         pa_strnull(pa_proplist_gets(sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));

    if ((n = pa_modargs_get_value(ma, "source_output_role", NULL)))
        pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ROLE, n);
    else
        pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ROLE, "abstract");

    if ((n = pa_proplist_gets(sink->proplist, PA_PROP_DEVICE_ICON_NAME)))
        pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ICON_NAME, n);

    pa_source_output_new_data_set_sample_spec(&source_output_data, &ss);
    pa_sink_input_new_data_set_channel_map(&sink_input_data, &map);

    pa_source_output_new(&u->source_output, m->core, &source_output_data);
    pa_source_output_new_data_done(&source_output_data);

    if (!u->source_output)
        goto fail;

    u->source_output->parent.process_msg = source_output_process_msg_cb;
    u->source_output->push = source_output_push_cb;
    u->source_output->process_rewind = source_output_process_rewind_cb;
    u->source_output->kill = source_output_kill_cb;
    u->source_output->attach = source_output_attach_cb;
    u->source_output->detach = source_output_detach_cb;
    u->source_output->state_change = source_output_state_change_cb;
    u->source_output->may_move_to = source_output_may_move_to_cb;
    u->source_output->moving = source_output_moving_cb;
    u->source_output->userdata = u;

    pa_source_output_set_requested_latency(u->source_output, u->latency/3);

    pa_sink_input_get_silence(u->sink_input, &silence);
    u->memblockq = pa_memblockq_new(
            0,                      /* idx */
            MEMBLOCKQ_MAXLENGTH,    /* maxlength */
            MEMBLOCKQ_MAXLENGTH,    /* tlength */
            pa_frame_size(&ss),     /* base */
            0,                      /* prebuf */
            0,                      /* minreq */
            0,                      /* maxrewind */
            &silence);              /* silence frame */
    pa_memblock_unref(silence.memblock);

    u->asyncmsgq = pa_asyncmsgq_new(0);

    pa_sink_input_put(u->sink_input);
    pa_source_output_put(u->source_output);

    if (u->adjust_time > 0)
        u->time_event = pa_core_rttime_new(m->core, pa_rtclock_now() + u->adjust_time, time_callback, u);

    pa_modargs_free(ma);
    return 0;

fail:
    if (ma)
        pa_modargs_free(ma);

    pa__done(m);

    return -1;
}