/* $Id$ */

/***
  This file is part of gst-pulse.

  gst-pulse is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation; either version 2.1 of the
  License, or (at your option) any later version.

  gst-pulse is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with gst-pulse; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <string.h>
#include <stdio.h>

#include <gst/base/gstbasesink.h>
#include <gst/gsttaglist.h>

#include "pulsesink.h"
#include "pulseutil.h"

GST_DEBUG_CATEGORY_EXTERN(pulse_debug);
#define GST_CAT_DEFAULT pulse_debug

enum {
    PROP_SERVER = 1,
    PROP_DEVICE,
};

static GstAudioSinkClass *parent_class = NULL;

static void gst_pulsesink_destroy_stream(GstPulseSink *pulsesink);
static void gst_pulsesink_destroy_context(GstPulseSink *pulsesink);

static void gst_pulsesink_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_pulsesink_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_pulsesink_finalize(GObject *object);
static void gst_pulsesink_dispose(GObject *object);

static gboolean gst_pulsesink_open(GstAudioSink *asink);
static gboolean gst_pulsesink_close(GstAudioSink *asink);

static gboolean gst_pulsesink_prepare(GstAudioSink *asink, GstRingBufferSpec *spec);
static gboolean gst_pulsesink_unprepare(GstAudioSink *asink);

static guint gst_pulsesink_write(GstAudioSink *asink, gpointer data, guint length);
static guint gst_pulsesink_delay(GstAudioSink *asink);
static void gst_pulsesink_reset(GstAudioSink *asink);

static gboolean gst_pulsesink_event(GstBaseSink *sink, GstEvent *event);

#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
# define ENDIANNESS   "LITTLE_ENDIAN, BIG_ENDIAN"
#else
# define ENDIANNESS   "BIG_ENDIAN, LITTLE_ENDIAN"
#endif

static void gst_pulsesink_base_init(gpointer g_class) {

    static GstStaticPadTemplate pad_template = GST_STATIC_PAD_TEMPLATE(
            "sink",
            GST_PAD_SINK,
            GST_PAD_ALWAYS,
            GST_STATIC_CAPS(
                    "audio/x-raw-int, "
                    "endianness = (int) { " ENDIANNESS " }, "
                    "signed = (boolean) TRUE, "
                    "width = (int) 16, "
                    "depth = (int) 16, "
                    "rate = (int) [ 1, MAX ], "
                    "channels = (int) [ 1, 16 ];"

                    "audio/x-raw-float, "
                    "endianness = (int) { " ENDIANNESS " }, "
                    "width = (int) 32, "
                    "rate = (int) [ 1, MAX ], "
                    "channels = (int) [ 1, 16 ];"

                    "audio/x-raw-int, "
                    "endianness = (int) { " ENDIANNESS " }, "
                    "signed = (boolean) TRUE, "
                    "width = (int) 32, "
                    "depth = (int) 32, "
                    "rate = (int) [ 1, MAX ], "
                    "channels = (int) [ 1, 16 ];"

                    "audio/x-raw-int, "
                    "signed = (boolean) FALSE, "
                    "width = (int) 8, "
                    "depth = (int) 8, "
                    "rate = (int) [ 1, MAX ], "
                    "channels = (int) [ 1, 16 ];"

                    "audio/x-alaw, "
                    "rate = (int) [ 1, MAX], "
                    "channels = (int) [ 1, 16 ];"

                    "audio/x-mulaw, "
                    "rate = (int) [ 1, MAX], "
                    "channels = (int) [ 1, 16 ]"
            )
    );

    static const GstElementDetails details =
        GST_ELEMENT_DETAILS(
                "PulseAudio Audio Sink",
                "Sink/Audio",
                "Plays audio to a PulseAudio server",
                "Lennart Poettering");

    GstElementClass *element_class = GST_ELEMENT_CLASS(g_class);

    gst_element_class_set_details(element_class, &details);
    gst_element_class_add_pad_template(element_class, gst_static_pad_template_get(&pad_template));
}

static void gst_pulsesink_class_init(
        gpointer g_class,
        gpointer class_data) {

    GObjectClass *gobject_class = G_OBJECT_CLASS(g_class);
    GstBaseSinkClass *gstbasesink_class = GST_BASE_SINK_CLASS(g_class);
    GstAudioSinkClass *gstaudiosink_class = GST_AUDIO_SINK_CLASS(g_class);
    parent_class = g_type_class_peek_parent(g_class);

    gobject_class->dispose = GST_DEBUG_FUNCPTR(gst_pulsesink_dispose);
    gobject_class->finalize = GST_DEBUG_FUNCPTR(gst_pulsesink_finalize);
    gobject_class->set_property = GST_DEBUG_FUNCPTR(gst_pulsesink_set_property);
    gobject_class->get_property = GST_DEBUG_FUNCPTR(gst_pulsesink_get_property);

    gstbasesink_class->event = GST_DEBUG_FUNCPTR(gst_pulsesink_event);

    gstaudiosink_class->open = GST_DEBUG_FUNCPTR(gst_pulsesink_open);
    gstaudiosink_class->close = GST_DEBUG_FUNCPTR(gst_pulsesink_close);
    gstaudiosink_class->prepare = GST_DEBUG_FUNCPTR(gst_pulsesink_prepare);
    gstaudiosink_class->unprepare = GST_DEBUG_FUNCPTR(gst_pulsesink_unprepare);
    gstaudiosink_class->write = GST_DEBUG_FUNCPTR(gst_pulsesink_write);
    gstaudiosink_class->delay = GST_DEBUG_FUNCPTR(gst_pulsesink_delay);
    gstaudiosink_class->reset = GST_DEBUG_FUNCPTR(gst_pulsesink_reset);

    /* Overwrite GObject fields */
    g_object_class_install_property(
            gobject_class,
            PROP_SERVER,
            g_param_spec_string("server", "Server", "The PulseAudio server to connect to", NULL, G_PARAM_READWRITE));
    g_object_class_install_property(
            gobject_class,
            PROP_DEVICE,
            g_param_spec_string("device", "Sink", "The PulseAudio sink device to connect to", NULL, G_PARAM_READWRITE));
}

static void gst_pulsesink_init(
        GTypeInstance * instance,
        gpointer g_class) {

    GstPulseSink *pulsesink = GST_PULSESINK(instance);
    int e;

    pulsesink->server = pulsesink->device = pulsesink->stream_name = NULL;

    pulsesink->context = NULL;
    pulsesink->stream = NULL;

    pulsesink->mainloop = pa_threaded_mainloop_new();
    g_assert(pulsesink->mainloop);

    e = pa_threaded_mainloop_start(pulsesink->mainloop);
    g_assert(e == 0);
}

static void gst_pulsesink_destroy_stream(GstPulseSink* pulsesink) {
    if (pulsesink->stream) {
        pa_stream_disconnect(pulsesink->stream);
        pa_stream_unref(pulsesink->stream);
        pulsesink->stream = NULL;
    }

    g_free(pulsesink->stream_name);
    pulsesink->stream_name = NULL;
}

static void gst_pulsesink_destroy_context(GstPulseSink* pulsesink) {

    gst_pulsesink_destroy_stream(pulsesink);

    if (pulsesink->context) {
        pa_context_disconnect(pulsesink->context);
        pa_context_unref(pulsesink->context);
        pulsesink->context = NULL;
    }
}

static void gst_pulsesink_finalize(GObject * object) {
    GstPulseSink *pulsesink = GST_PULSESINK(object);

    pa_threaded_mainloop_stop(pulsesink->mainloop);

    gst_pulsesink_destroy_context(pulsesink);

    g_free(pulsesink->server);
    g_free(pulsesink->device);
    g_free(pulsesink->stream_name);

    pa_threaded_mainloop_free(pulsesink->mainloop);

    G_OBJECT_CLASS(parent_class)->finalize(object);
}

static void gst_pulsesink_dispose(GObject * object) {
    G_OBJECT_CLASS(parent_class)->dispose(object);
}

static void gst_pulsesink_set_property(
        GObject * object,
        guint prop_id,
        const GValue * value,
        GParamSpec * pspec) {
    GstPulseSink *pulsesink = GST_PULSESINK(object);

    switch (prop_id) {
        case PROP_SERVER:
            g_free(pulsesink->server);
            pulsesink->server = g_value_dup_string(value);
            break;

        case PROP_DEVICE:
            g_free(pulsesink->device);
            pulsesink->device = g_value_dup_string(value);
            break;

        default:
            G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
            break;
    }
}

static void gst_pulsesink_get_property(
        GObject * object,
        guint prop_id,
        GValue * value,
        GParamSpec * pspec) {

    GstPulseSink *pulsesink = GST_PULSESINK(object);

    switch(prop_id) {
        case PROP_SERVER:
            g_value_set_string(value, pulsesink->server);
            break;

        case PROP_DEVICE:
            g_value_set_string(value, pulsesink->device);
            break;

        default:
            G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
            break;
    }
}

static void gst_pulsesink_context_state_cb(pa_context *c, void *userdata) {
    GstPulseSink *pulsesink = GST_PULSESINK(userdata);

    switch (pa_context_get_state(c)) {
        case PA_CONTEXT_READY:
        case PA_CONTEXT_TERMINATED:
        case PA_CONTEXT_FAILED:
            pa_threaded_mainloop_signal(pulsesink->mainloop, 0);
            break;

        case PA_CONTEXT_UNCONNECTED:
        case PA_CONTEXT_CONNECTING:
        case PA_CONTEXT_AUTHORIZING:
        case PA_CONTEXT_SETTING_NAME:
            break;
    }
}

static void gst_pulsesink_stream_state_cb(pa_stream *s, void * userdata) {
    GstPulseSink *pulsesink = GST_PULSESINK(userdata);

    switch (pa_stream_get_state(s)) {

        case PA_STREAM_READY:
        case PA_STREAM_FAILED:
        case PA_STREAM_TERMINATED:
            pa_threaded_mainloop_signal(pulsesink->mainloop, 0);
            break;

        case PA_STREAM_UNCONNECTED:
        case PA_STREAM_CREATING:
            break;
    }
}

static void gst_pulsesink_stream_request_cb(pa_stream *s, size_t length, void *userdata) {
    GstPulseSink *pulsesink = GST_PULSESINK(userdata);

    pa_threaded_mainloop_signal(pulsesink->mainloop, 0);
}

static void gst_pulsesink_stream_latency_update_cb(pa_stream *s, void *userdata) {
    GstPulseSink *pulsesink = GST_PULSESINK(userdata);

    pa_threaded_mainloop_signal(pulsesink->mainloop, 0);
}

static gboolean gst_pulsesink_open(GstAudioSink *asink) {
    GstPulseSink *pulsesink = GST_PULSESINK(asink);
    gchar *name = gst_pulse_client_name();

    pa_threaded_mainloop_lock(pulsesink->mainloop);

    if (!(pulsesink->context = pa_context_new(pa_threaded_mainloop_get_api(pulsesink->mainloop), name))) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("Failed to create context"), (NULL));
        goto unlock_and_fail;
    }

    pa_context_set_state_callback(pulsesink->context, gst_pulsesink_context_state_cb, pulsesink);

    if (pa_context_connect(pulsesink->context, pulsesink->server, 0, NULL) < 0) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("Failed to connect: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
        goto unlock_and_fail;
    }

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

    if (pa_context_get_state(pulsesink->context) != PA_CONTEXT_READY) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("Failed to connect: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
        goto unlock_and_fail;
    }

    pa_threaded_mainloop_unlock(pulsesink->mainloop);
    g_free(name);
    return TRUE;

unlock_and_fail:

    pa_threaded_mainloop_unlock(pulsesink->mainloop);
    g_free(name);
    return FALSE;
}

static gboolean gst_pulsesink_close(GstAudioSink *asink) {
    GstPulseSink *pulsesink = GST_PULSESINK(asink);

    pa_threaded_mainloop_lock(pulsesink->mainloop);
    gst_pulsesink_destroy_context(pulsesink);
    pa_threaded_mainloop_unlock(pulsesink->mainloop);

    return TRUE;
}
static gboolean gst_pulsesink_prepare(GstAudioSink *asink, GstRingBufferSpec *spec) {
    pa_buffer_attr buf_attr;
    pa_channel_map channel_map;
    GstPulseSink *pulsesink = GST_PULSESINK(asink);

    if (!gst_pulse_fill_sample_spec(spec, &pulsesink->sample_spec)) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, SETTINGS, ("Invalid sample specification."), (NULL));
        goto unlock_and_fail;
    }

    pa_threaded_mainloop_lock(pulsesink->mainloop);

    if (!pulsesink->context || pa_context_get_state(pulsesink->context) != PA_CONTEXT_READY) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("Bad context state: %s", pulsesink->context ? pa_strerror(pa_context_errno(pulsesink->context)) : NULL), (NULL));
        goto unlock_and_fail;
    }

    if (!(pulsesink->stream = pa_stream_new(
                  pulsesink->context,
                  pulsesink->stream_name ? pulsesink->stream_name : "Playback Stream",
                  &pulsesink->sample_spec,
                  gst_pulse_gst_to_channel_map(&channel_map, spec)))) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("Failed to create stream: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
        goto unlock_and_fail;
    }

    pa_stream_set_state_callback(pulsesink->stream, gst_pulsesink_stream_state_cb, pulsesink);
    pa_stream_set_write_callback(pulsesink->stream, gst_pulsesink_stream_request_cb, pulsesink);
    pa_stream_set_latency_update_callback(pulsesink->stream, gst_pulsesink_stream_latency_update_cb, pulsesink);

    memset(&buf_attr, 0, sizeof(buf_attr));
    buf_attr.tlength = spec->segtotal*spec->segsize;
    buf_attr.maxlength = buf_attr.tlength*2;
    buf_attr.prebuf = buf_attr.tlength-spec->segsize;
    buf_attr.minreq = spec->segsize;

    if (pa_stream_connect_playback(pulsesink->stream, pulsesink->device, &buf_attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE|PA_STREAM_NOT_MONOTONOUS, NULL, NULL) < 0) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("Failed to connect stream: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
        goto unlock_and_fail;
    }

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

    if (pa_stream_get_state(pulsesink->stream) != PA_STREAM_READY) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("Failed to connect stream: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
        goto unlock_and_fail;
    }

    pa_threaded_mainloop_unlock(pulsesink->mainloop);

    spec->bytes_per_sample = pa_frame_size(&pulsesink->sample_spec);
    memset(spec->silence_sample, 0, spec->bytes_per_sample);

    return TRUE;

unlock_and_fail:

    pa_threaded_mainloop_unlock(pulsesink->mainloop);
    return FALSE;
}

static gboolean gst_pulsesink_unprepare(GstAudioSink * asink) {
    GstPulseSink *pulsesink = GST_PULSESINK(asink);

    pa_threaded_mainloop_lock(pulsesink->mainloop);
    gst_pulsesink_destroy_stream(pulsesink);
    pa_threaded_mainloop_unlock(pulsesink->mainloop);

    return TRUE;
}

#define CHECK_DEAD_GOTO(pulsesink, label) \
if (!(pulsesink)->context || pa_context_get_state((pulsesink)->context) != PA_CONTEXT_READY || \
    !(pulsesink)->stream || pa_stream_get_state((pulsesink)->stream) != PA_STREAM_READY) { \
    GST_ELEMENT_ERROR((pulsesink), RESOURCE, FAILED, ("Disconnected: %s", (pulsesink)->context ? pa_strerror(pa_context_errno((pulsesink)->context)) : NULL), (NULL)); \
    goto label; \
}

static guint gst_pulsesink_write(GstAudioSink *asink, gpointer data, guint length) {
    GstPulseSink *pulsesink = GST_PULSESINK(asink);
    size_t sum = 0;

    pa_threaded_mainloop_lock(pulsesink->mainloop);

    while (length > 0) {
        size_t l;

        for (;;) {
            CHECK_DEAD_GOTO(pulsesink, unlock_and_fail);

            if ((l = pa_stream_writable_size(pulsesink->stream)) == (size_t) -1) {
                GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("pa_stream_writable_size() failed: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
                goto unlock_and_fail;
            }

            if (l > 0)
                break;

            pa_threaded_mainloop_wait(pulsesink->mainloop);
        }

        if (l > length)
            l = length;

        if (pa_stream_write(pulsesink->stream, data, l, NULL, 0, PA_SEEK_RELATIVE) < 0) {
            GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("pa_stream_write() failed: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
            goto unlock_and_fail;
        }

        data = (guint8*) data + l;
        length -= l;

        sum += l;
    }

    pa_threaded_mainloop_unlock(pulsesink->mainloop);

    return sum;

unlock_and_fail:

    pa_threaded_mainloop_unlock(pulsesink->mainloop);
    return 0;
}

static guint gst_pulsesink_delay(GstAudioSink *asink) {
    GstPulseSink *pulsesink = GST_PULSESINK(asink);
    pa_usec_t t;

    pa_threaded_mainloop_lock(pulsesink->mainloop);

    for (;;) {
        CHECK_DEAD_GOTO(pulsesink, unlock_and_fail);

        if (pa_stream_get_latency(pulsesink->stream, &t, NULL) >= 0)
            break;

        if (pa_context_errno(pulsesink->context) != PA_ERR_NODATA) {
            GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("pa_stream_get_latency() failed: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
            goto unlock_and_fail;
        }

        pa_threaded_mainloop_wait(pulsesink->mainloop);
    }

    pa_threaded_mainloop_unlock(pulsesink->mainloop);

    return gst_util_uint64_scale_int (t, pulsesink->sample_spec.rate, 1000000LL);

unlock_and_fail:

    pa_threaded_mainloop_unlock(pulsesink->mainloop);
    return 0;
}

static void gst_pulsesink_success_cb(pa_stream *s, int success, void *userdata) {
    GstPulseSink *pulsesink = GST_PULSESINK(userdata);

    pulsesink->operation_success = success;
    pa_threaded_mainloop_signal(pulsesink->mainloop, 0);
}

static void gst_pulsesink_reset(GstAudioSink *asink) {
    GstPulseSink *pulsesink = GST_PULSESINK(asink);
    pa_operation *o = NULL;

    pa_threaded_mainloop_lock(pulsesink->mainloop);

    CHECK_DEAD_GOTO(pulsesink, unlock_and_fail);

    if (!(o = pa_stream_flush(pulsesink->stream, gst_pulsesink_success_cb, pulsesink))) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("pa_stream_flush() failed: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
        goto unlock_and_fail;
    }

    pulsesink->operation_success = 0;
    while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
        CHECK_DEAD_GOTO(pulsesink, unlock_and_fail);

        pa_threaded_mainloop_wait(pulsesink->mainloop);
    }

    if (!pulsesink->operation_success) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("Flush failed: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
        goto unlock_and_fail;
    }

unlock_and_fail:

    if (o) {
        pa_operation_cancel(o);
        pa_operation_unref(o);
    }

    pa_threaded_mainloop_unlock(pulsesink->mainloop);
}

static void gst_pulsesink_change_title(GstPulseSink *pulsesink, const gchar *t) {
    pa_operation *o = NULL;

    pa_threaded_mainloop_lock(pulsesink->mainloop);

    g_free(pulsesink->stream_name);
    pulsesink->stream_name = g_strdup(t);

    if (!(pulsesink)->context || pa_context_get_state((pulsesink)->context) != PA_CONTEXT_READY ||
        !(pulsesink)->stream || pa_stream_get_state((pulsesink)->stream) != PA_STREAM_READY) {
        goto unlock_and_fail;
    }

    if (!(o = pa_stream_set_name(pulsesink->stream, pulsesink->stream_name, NULL, pulsesink))) {
        GST_ELEMENT_ERROR(pulsesink, RESOURCE, FAILED, ("pa_stream_set_name() failed: %s", pa_strerror(pa_context_errno(pulsesink->context))), (NULL));
        goto unlock_and_fail;
    }

    /* We're not interested if this operation failed or not */

unlock_and_fail:

    if (o)
        pa_operation_unref(o);

    pa_threaded_mainloop_unlock(pulsesink->mainloop);
}

static gboolean gst_pulsesink_event(GstBaseSink *sink, GstEvent *event) {
    GstPulseSink *pulsesink = GST_PULSESINK(sink);

    switch (GST_EVENT_TYPE(event)) {
        case GST_EVENT_TAG: {
            gchar *title = NULL, *artist = NULL, *location = NULL, *description = NULL, *t = NULL, *buf = NULL;
            GstTagList *l;

            gst_event_parse_tag(event, &l);

            gst_tag_list_get_string(l, GST_TAG_TITLE, &title);
            gst_tag_list_get_string(l, GST_TAG_ARTIST, &artist);
            gst_tag_list_get_string(l, GST_TAG_LOCATION, &location);
            gst_tag_list_get_string(l, GST_TAG_DESCRIPTION, &description);

            if (title && artist)
                t = buf = g_strdup_printf("'%s' by '%s'", g_strstrip(title), g_strstrip(artist));
            else if (title)
                t = g_strstrip(title);
            else if (description)
                t = g_strstrip(description);
            else if (location)
                t = g_strstrip(location);

            if (t)
                gst_pulsesink_change_title(pulsesink, t);

            g_free(title);
            g_free(artist);
            g_free(location);
            g_free(description);
            g_free(buf);

            break;
        }
        default:
            ;
    }

    return GST_BASE_SINK_CLASS(parent_class)->event(sink, event);
}

GType gst_pulsesink_get_type(void) {
    static GType pulsesink_type = 0;

    if (!pulsesink_type) {

        static const GTypeInfo pulsesink_info = {
            sizeof(GstPulseSinkClass),
            gst_pulsesink_base_init,
            NULL,
            gst_pulsesink_class_init,
            NULL,
            NULL,
            sizeof(GstPulseSink),
            0,
            gst_pulsesink_init,
        };

        pulsesink_type = g_type_register_static(
                GST_TYPE_AUDIO_SINK,
                "GstPulseSink",
                &pulsesink_info,
                0);
    }

    return pulsesink_type;
}