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

#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <glib.h>
#include <gst/gst.h>
#include <string.h>

#include "gmencoder.h"

#define G_MENCODER_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE ((obj), G_TYPE_MENCODER, GMencoderPrivate))

// #define SUPPORT_MULT_INPUT 0

typedef struct _GMencoderPrivate GMencoderPrivate;
typedef struct _SetupInfo SetupInfo;

struct _SetupInfo {
    gchar          *video_encode;
    gchar          *mux_name;
    gchar         **video_encode_prop;
    gdouble         video_fps;
    gdouble         video_rate;
    guint           video_width;
    guint           video_height;
    gchar          *audio_encode;
    gchar         **audio_encode_prop;
    guint           audio_rate;
};


struct _GMencoderPrivate {
    GstElement     *pipe;
    GstElement     *abin;
    GstElement     *vbin;
    GstElement     *sink;
    GstElement     *src;
    gboolean        ready;
    SetupInfo      *info;
    GstClockTime    videot;
    GstClockTime    audiot;
    gint            fd;
    gint            sources;
    gint            tick_id;
    gint64          duration;
};

enum {
    PAUSED,
    PLAYING,
    STOPED,
    EOS,
    ERROR,
    LAST_SIGNAL
};

static void     g_mencoder_class_init(GMencoderClass * klass);
static void     g_mencoder_init(GMencoder * object);
static void     g_mencoder_dispose(GObject * object);
static void     g_mencoder_finalize(GObject * object);
static GstElement *_create_audio_bin(const gchar * encode,
                                     gchar ** encode_prop, gint rate);
static GstElement *_create_video_bin(const gchar * encode,
                                     gchar ** encode_prop,
                                     gdouble fps,
                                     gint rate, guint width, guint height);

static          gboolean
_pipeline_bus_cb(GstBus * bus, GstMessage * msg, gpointer user_data);

static void     _decodebin_new_pad_cb(GstElement * object,
                                      GstPad * pad,
                                      gboolean flag, gpointer user_data);

static void     _decodebin_unknown_type_cb(GstElement * object,
                                           GstPad * pad,
                                           GstCaps * caps,
                                           gpointer user_data);

static void     _close_output(GMencoder * self);
static void     _open_output(GMencoder * self, const gchar * uri);

static GstElement *_create_source(const gchar * uri);
static GstElement *_create_pipeline(GMencoder * self,
                                    const gchar * video_encode,
                                    const gchar * mux_name,
                                    gchar ** video_encode_prop,
                                    gdouble video_fps,
                                    gdouble video_rate,
                                    guint video_width,
                                    guint video_height,
                                    const gchar * audio_encode,
                                    gchar ** audio_encode_prop,
                                    guint audio_rate);

static gboolean _tick_cb(gpointer data);

static guint    g_mencoder_signals[LAST_SIGNAL] = { 0 };

G_DEFINE_TYPE(GMencoder, g_mencoder, G_TYPE_OBJECT)
    static void     g_mencoder_class_init(GMencoderClass * klass)
{
    GObjectClass   *object_class;
    object_class = (GObjectClass *) klass;
    g_type_class_add_private(klass, sizeof(GMencoderPrivate));

    object_class->dispose = g_mencoder_dispose;
    object_class->finalize = g_mencoder_finalize;

    g_mencoder_signals[PAUSED] =
        g_signal_new("paused",
                     G_OBJECT_CLASS_TYPE(object_class),
                     G_SIGNAL_RUN_FIRST,
                     0, NULL, NULL,
                     g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);

    g_mencoder_signals[PLAYING] =
        g_signal_new("playing",
                     G_OBJECT_CLASS_TYPE(object_class),
                     G_SIGNAL_RUN_FIRST,
                     0, NULL, NULL,
                     g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);

    g_mencoder_signals[STOPED] =
        g_signal_new("stoped",
                     G_OBJECT_CLASS_TYPE(object_class),
                     G_SIGNAL_RUN_FIRST,
                     0, NULL, NULL,
                     g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);

    g_mencoder_signals[EOS] =
        g_signal_new("eos",
                     G_OBJECT_CLASS_TYPE(object_class),
                     G_SIGNAL_RUN_FIRST,
                     0, NULL, NULL,
                     g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);

    g_mencoder_signals[ERROR] =
        g_signal_new("error",
                     G_OBJECT_CLASS_TYPE(object_class),
                     G_SIGNAL_RUN_LAST,
                     0, NULL, NULL,
                     g_cclosure_marshal_VOID__STRING,
                     G_TYPE_NONE, 1, G_TYPE_STRING);
}

static void
g_mencoder_init(GMencoder * self)
{
    GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE(self);
    priv->info = g_new0(SetupInfo, 1);
}

static void
g_mencoder_dispose(GObject * object)
{
}

static void
g_mencoder_finalize(GObject * object)
{
    // TODO: clear vars
    g_mencoder_close_stream(G_MENCODER(object));
}

GMencoder      *
g_mencoder_new(void)
{
    return g_object_new(G_TYPE_MENCODER, NULL);
}


static void
_obj_set_prop(GObject * obj, const gchar * prop_name,
              const gchar * prop_val)
{
    GValue          p = { 0 };
    GValue          v = { 0 };
    GParamSpec     *s = NULL;
    GObjectClass   *k = G_OBJECT_GET_CLASS(obj);


    g_value_init(&v, G_TYPE_STRING);
    g_value_set_string(&v, prop_val);

    s = g_object_class_find_property(k, prop_name);
    if (s == NULL) {
        g_print("Invalid property name: %s\n", prop_name);
        return;
    }

    g_value_init(&p, s->value_type);
    switch (s->value_type) {
    case G_TYPE_INT:
        g_value_set_int(&p, atoi(prop_val));
        break;
    case G_TYPE_STRING:
        g_value_set_string(&p, prop_val);
        break;
    default:
        return;
    }

    g_object_set_property(obj, prop_name, &p);
    g_value_unset(&v);
    g_value_unset(&p);
}

static GstElement *
_create_element_with_prop(const gchar * factory_name,
                          const gchar * element_name, gchar ** prop)
{
    GstElement     *ret;
    int             i;

    ret = gst_element_factory_make(factory_name, element_name);
    if (ret == NULL)
        return NULL;

    if (prop != NULL) {
        for (i = 0; i < g_strv_length(prop); i++) {
            if (prop[i] != NULL) {
                char          **v = g_strsplit(prop[i], "=", 2);
                if (g_strv_length(v) == 2) {
                    _obj_set_prop(G_OBJECT(ret), v[0], v[1]);
                }
                g_strfreev(v);
            }
        }
    }

    return ret;

}

static GstElement *
_create_audio_bin(const gchar * encode, gchar ** encode_prop, gint rate)
{
    GstElement     *abin = NULL;
    GstElement     *aqueue = NULL;
    GstElement     *aconvert = NULL;
    GstElement     *aencode = NULL;
    GstElement     *aqueue_src = NULL;
    GstPad         *apad = NULL;

    // audio/x-raw-int ! queue ! audioconvert ! faac ! rtpmp4gpay !
    // udpsink name=upd_audio host=224.0.0.1 port=5002
    abin = gst_bin_new("abin");
    aqueue = gst_element_factory_make("queue", "aqueue");
    aconvert = gst_element_factory_make("audioconvert", "aconvert");
    aencode =
        _create_element_with_prop((encode ? encode : "lame"), "aencode",
                                  encode_prop);
    aqueue_src = gst_element_factory_make("queue", "aqueue_src");

    if ((abin == NULL) || (aqueue == NULL) || (aconvert == NULL)
        || (aencode == NULL) || (aqueue_src == NULL)) {
        g_warning("Audio elements not found");
        goto error;
    }

    g_object_set(G_OBJECT(aencode), "bitrate", 32, NULL);
    /*
     * if (rate > 0) { g_object_set (G_OBJECT (aencode), "bitrate", 32,
     * NULL); } 
     */

    gst_bin_add_many(GST_BIN(abin), aqueue, aconvert, aencode, aqueue_src,
                     NULL);
    if (gst_element_link_many(aqueue, aconvert, aencode, aqueue_src, NULL)
        == FALSE) {
        g_warning("Not Link audio elements");
    }
    // TODO: apply audio rate

    // ghost pad the audio bin
    apad = gst_element_get_pad(aqueue, "sink");
    gst_element_add_pad(abin, gst_ghost_pad_new("sink", apad));
    gst_object_unref(apad);

    apad = gst_element_get_pad(aqueue_src, "src");
    gst_element_add_pad(abin, gst_ghost_pad_new("src", apad));
    gst_object_unref(apad);

    return abin;
  error:
    if (abin != NULL)
        gst_object_unref(abin);

    if (aqueue != NULL)
        gst_object_unref(aqueue);

    if (aconvert != NULL)
        gst_object_unref(aconvert);

    if (aencode != NULL)
        gst_object_unref(aencode);

    if (aqueue_src != NULL)
        gst_object_unref(aqueue_src);

    if (apad != NULL)
        gst_object_unref(apad);

    return NULL;
}




// queue ! videoscale ! video/x-raw-yuv,width=240,height=144 ! colorspace
// ! rate ! encode ! queue
static GstElement *
_create_video_bin(const gchar * encode,
                  gchar ** encode_prop,
                  gdouble fps, gint rate, guint width, guint height)
{
    GstElement     *vbin = NULL;
    GstElement     *vqueue = NULL;
    GstElement     *vqueue_src = NULL;
    GstElement     *vcolorspace = NULL;
    GstElement     *vencode = NULL;
    GstElement     *vrate = NULL;
    GstPad         *vpad = NULL;

    vbin = gst_bin_new("vbin");
    vqueue = gst_element_factory_make("queue", "vqueue");
    vcolorspace =
        gst_element_factory_make("ffmpegcolorspace", "colorspace");

    vencode = _create_element_with_prop((encode !=
                                         NULL ? encode :
                                         "ffenc_mpeg1video"), "vencode",
                                        encode_prop);
    vqueue_src = gst_element_factory_make("queue", "queue_src");

    if ((vbin == NULL) || (vqueue == NULL) || (vcolorspace == NULL)
        || (vencode == NULL) || (vqueue_src == NULL)) {
        g_warning("Video elements not found");
        goto error;
    }

    gst_bin_add_many(GST_BIN(vbin), vqueue, vcolorspace, vencode,
                     vqueue_src, NULL);

    if ((width > 0) && (height > 0)) {
        // Scalling video
        GstCaps        *vcaps;
        GstElement     *vscale =
            gst_element_factory_make("videoscale", "vscale");

        gst_bin_add(GST_BIN(vbin), vscale);

        vcaps = gst_caps_new_simple("video/x-raw-yuv",
                                    "width", G_TYPE_INT, width,
                                    "height", G_TYPE_INT, height, NULL);

        gst_element_link(vqueue, vscale);

        if (gst_element_link_filtered(vscale, vcolorspace, vcaps) == FALSE) {
            g_warning("Fail to resize video");
            gst_object_unref(vcaps);
            gst_object_unref(vscale);
            goto error;
        }
        gst_caps_unref(vcaps);
    } else {
        gst_element_link(vqueue, vcolorspace);
    }

    if (fps > 0) {
        // Changing the video fps
        GstCaps        *vcaps;
        vrate = gst_element_factory_make("videorate", "vrate");

        gst_bin_add(GST_BIN(vbin), vrate);

        if (gst_element_link(vcolorspace, vrate) == FALSE) {
            g_warning("Fail to link video elements");
            goto error;
        }

        vcaps = gst_caps_new_simple("video/x-raw-yuv",
                                    "framerate", GST_TYPE_FRACTION,
                                    (int) (fps * 1000), 1000, NULL);

        if (gst_element_link_filtered(vrate, vencode, vcaps) == FALSE) {
            g_warning("Fail to link vrate with vencode.");
            goto error;
        }
        gst_caps_unref(vcaps);
    } else {
        if (gst_element_link(vcolorspace, vencode) == FALSE) {
            g_warning("Fail to link colorspace and video encode element.");
            goto error;
        }
    }

    gst_element_link(vencode, vqueue_src);

    // ghost pad the video bin
    vpad = gst_element_get_pad(vqueue, "sink");
    gst_element_add_pad(vbin, gst_ghost_pad_new("sink", vpad));
    gst_object_unref(vpad);

    vpad = gst_element_get_pad(vqueue_src, "src");
    gst_element_add_pad(vbin, gst_ghost_pad_new("src", vpad));
    gst_object_unref(vpad);

    return vbin;

  error:
    if (vpad != NULL)
        gst_object_unref(vpad);

    if (vbin != NULL)
        gst_object_unref(vbin);

    if (vqueue != NULL)
        gst_object_unref(vqueue);

    if (vencode != NULL)
        gst_object_unref(vencode);

    if (vqueue_src != NULL)
        gst_object_unref(vqueue_src);

    if (vcolorspace != NULL)
        gst_object_unref(vcolorspace);

    return NULL;
}



void
g_mencoder_setup_stream(GMencoder * self,
                        const gchar * mux_name,
                        const gchar * video_encode,
                        gchar ** video_encode_prop,
                        gdouble video_fps,
                        gdouble video_rate,
                        guint video_width,
                        guint video_height,
                        const gchar * audio_encode,
                        gchar ** audio_encode_prop,
                        guint audio_rate, const gchar * out_uri)
{
    GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE(self);
    if (priv->ready == TRUE) {
        g_warning
            ("Stream already configured. You need close stream first.");
        return;
    }

    _close_output(self);
    _open_output(self, out_uri);

    priv->sources = 0;
    priv->pipe = _create_pipeline(self,
                                  video_encode,
                                  mux_name,
                                  video_encode_prop,
                                  video_fps,
                                  video_rate,
                                  video_width,
                                  video_height,
                                  audio_encode, audio_encode_prop,
                                  audio_rate);

}


gboolean
g_mencoder_append_uri(GMencoder * self, const gchar * uri)
{
    GstPad         *pad_src;
    GstPad         *pad_sink;
    GstElement     *src;
    GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE(self);
    gboolean        ret = FALSE;
    GstElement     *ap = NULL;
    GstElement     *vp = NULL;


    g_return_val_if_fail(priv->pipe != NULL, FALSE);
    g_return_val_if_fail(priv->ready == FALSE, FALSE);

#ifndef SUPPORT_MULT_INPUT
    g_return_val_if_fail(priv->sources < 1, FALSE);
#endif

    src = _create_source(uri);
    if (src == NULL)
        return FALSE;

    priv->src = gst_bin_get_by_name(GST_BIN(src), "src");

    gst_bin_add(GST_BIN(priv->pipe), src);

#ifdef SUPPORT_MULT_INPUT
    ap = gst_bin_get_by_name(GST_BIN(priv->pipe), "ap");
    vp = gst_bin_get_by_name(GST_BIN(priv->pipe), "vp");
#else
    ap = gst_bin_get_by_name(GST_BIN(priv->pipe), "abin");
    vp = gst_bin_get_by_name(GST_BIN(priv->pipe), "vbin");
#endif

    if ((vp == NULL) || (ap == NULL)) {
        g_warning("Fail to get output bin");
        goto error;
    }

    pad_src = gst_element_get_pad(src, "src_audio");
    pad_sink = gst_element_get_compatible_pad(ap,
                                              pad_src,
                                              gst_pad_get_caps(pad_src));

    if ((pad_sink == NULL) || (pad_src == NULL))
        goto error;

    GstPadLinkReturn lret = gst_pad_link(pad_src, pad_sink);
    if (lret != GST_PAD_LINK_OK)
        goto error;

    gst_object_unref(pad_src);
    gst_object_unref(pad_sink);

    pad_src = gst_element_get_pad(src, "src_video");
    pad_sink = gst_element_get_compatible_pad(vp,
                                              pad_src,
                                              gst_pad_get_caps(pad_src));

    if ((pad_src == NULL) || (pad_sink == NULL))
        goto error;

    if (gst_pad_link(pad_src, pad_sink) != GST_PAD_LINK_OK) {
        g_warning("invalid source. video");
        goto error;
    }

    priv->sources++;
    ret = TRUE;
  error:

    if ((src != NULL) && (ret == FALSE)) {
        gst_bin_remove(GST_BIN(priv->pipe), src);
        gst_object_unref(src);
    }

    if (ap != NULL)
        gst_object_unref(ap);

    if (vp != NULL)
        gst_object_unref(vp);

    if (pad_src != NULL)
        gst_object_unref(pad_src);

    if (pad_sink != NULL)
        gst_object_unref(pad_sink);

    return ret;
}



void
g_mencoder_remove_uri(GMencoder * self, const gchar * uri)
{
    // GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE (self);
    // TODO: remove src
}

void
g_mencoder_play_stream(GMencoder * self)
{
    GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE(self);
    g_return_if_fail(priv->ready == FALSE);
    priv->ready = TRUE;
    gst_element_set_state(priv->pipe, GST_STATE_PLAYING);
    priv->tick_id = g_timeout_add(500, _tick_cb, self);
}

void
g_mencoder_pause_stream(GMencoder * self)
{
    GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE(self);
    g_return_if_fail(priv->ready == TRUE);
    gst_element_set_state(priv->pipe, GST_STATE_PAUSED);
}

void
g_mencoder_close_stream(GMencoder * self)
{

    GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE(self);
    if (priv->tick_id != 0) {
        g_source_remove(priv->tick_id);
        priv->tick_id = 0;
    }

    if (priv->pipe != NULL) {
        // TODO: fixe pipeline dispose
        // gst_element_set_state (priv->pipe, GST_STATE_NULL);
        // g_debug ("SETING STATE TO NULL: OK");
        // gst_element_set_state (priv->pipe, GST_STATE_NULL);
        // gst_object_unref (priv->pipe);
        gst_object_unref(priv->src);
        priv->src = NULL;
        priv->pipe = NULL;
        priv->abin = NULL;
        priv->vbin = NULL;
        priv->sink = NULL;
    }
    priv->ready = FALSE;
}

static GstElement *
_create_pipeline(GMencoder * self,
                 const gchar * video_encode,
                 const gchar * mux_name,
                 gchar ** video_encode_prop,
                 gdouble video_fps,
                 gdouble video_rate,
                 guint video_width,
                 guint video_height,
                 const gchar * audio_encode,
                 gchar ** audio_encode_prop, guint audio_rate)
{
    GstBus         *bus = NULL;
    GstElement     *pipe = NULL;
    GstElement     *sink = NULL;
    GstElement     *mux = NULL;
    GstElement     *abin = NULL;
    GstElement     *vbin = NULL;
    GstElement     *queue = NULL;
    GstPad         *aux_pad = NULL;
    GstPad         *mux_pad = NULL;
#ifdef SUPPORT_MULT_INPUT
    GstElement     *ap = NULL;
    GstElement     *vp = NULL;
#endif
    GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE(self);

    pipe = gst_pipeline_new("pipe");

#ifdef SUPPORT_MULT_INPUT
    ap = gst_element_factory_make("concatmux", "ap");
    vp = gst_element_factory_make("concatmux", "vp");
    gst_bin_add_many(GST_BIN(pipe), ap, vp, NULL);
#endif

    mux =
        gst_element_factory_make((mux_name ? mux_name : "ffmux_mpeg"),
                                 "mux");
    if (mux == NULL)
        goto error;

    queue = gst_element_factory_make("queue", "queueu_sink");


    sink = gst_element_factory_make("fdsink", "sink");
    if (sink == NULL)
        goto error;

    g_object_set(G_OBJECT(sink), "fd", priv->fd, "sync", FALSE, NULL);

    abin = _create_audio_bin(audio_encode, audio_encode_prop, audio_rate);
    if (abin == NULL)
        goto error;

    vbin =
        _create_video_bin(video_encode, video_encode_prop, video_fps,
                          video_rate, video_width, video_height);
    if (vbin == NULL)
        goto error;

    // Finish Pipe
    gst_bin_add_many(GST_BIN(pipe), abin, vbin, mux, queue, sink, NULL);


#ifdef SUPPORT_MULT_INPUT
    if (gst_element_link(ap, abin) == FALSE) {
        g_warning("Fail to link concat and abin");
        goto error;
    }

    if (gst_element_link(vp, vbin) == FALSE) {
        g_warning("Fail to link concat and vbin");
    }
#endif

    // Link bins with mux
    aux_pad = gst_element_get_pad(abin, "src");
    mux_pad =
        gst_element_get_compatible_pad(mux, aux_pad,
                                       GST_PAD_CAPS(aux_pad));
    if (mux_pad == NULL) {
        g_warning("Mux element no have audio PAD");
        goto error;
    }
    GstPadLinkReturn ret = gst_pad_link(aux_pad, mux_pad);
    if (ret != GST_PAD_LINK_OK) {
        g_warning("Fail link audio and mux: %d", ret);
        goto error;

    }
    gst_object_unref(aux_pad);
    gst_object_unref(mux_pad);

    aux_pad = gst_element_get_pad(vbin, "src");
    mux_pad =
        gst_element_get_compatible_pad(mux, aux_pad,
                                       GST_PAD_CAPS(aux_pad));
    if (mux_pad == NULL) {
        g_warning("Mux element no have video PAD");
        goto error;
    }
    ret = gst_pad_link(aux_pad, mux_pad);
    if (ret != GST_PAD_LINK_OK) {
        g_warning("Fail link video and mux: %d", ret);
        goto error;
    }
    gst_object_unref(aux_pad);
    gst_object_unref(mux_pad);
    aux_pad = NULL;
    mux_pad = NULL;

    // Link mux with sink
    gst_element_link_many(mux, queue, sink, NULL);

    bus = gst_pipeline_get_bus(GST_PIPELINE(pipe));
    gst_bus_add_watch(bus, _pipeline_bus_cb, self);
    gst_object_unref(bus);
    return pipe;

  error:
    g_warning("Invalid uri");

    if (pipe != NULL) {
        gst_object_unref(pipe);
    }


    if (mux != NULL) {
        gst_object_unref(mux);
    }

    if (mux_pad != NULL) {
        gst_object_unref(mux_pad);
    }

    if (aux_pad != NULL) {
        gst_object_unref(mux_pad);
    }

    if (sink != NULL) {
        gst_object_unref(sink);
    }

    if (abin != NULL) {
        gst_object_unref(abin);
    }

    if (vbin != NULL) {
        gst_object_unref(vbin);
    }

    return FALSE;
}


static void
_close_output(GMencoder * self)
{
}

static GstElement *
_create_source(const gchar * uri)
{

    GstElement     *bsrc = NULL;
    GstElement     *src = NULL;
    GstElement     *queue = NULL;
    GstElement     *aqueue = NULL;
    GstElement     *vqueue = NULL;
    GstElement     *decode = NULL;
    GstPad         *src_pad = NULL;


    bsrc = gst_bin_new(NULL);

    // src = gst_element_factory_make ("gnomevfssrc", "src");
    // g_object_set (G_OBJECT (src), "location", uri, NULL);
    src = gst_element_make_from_uri(GST_URI_SRC, uri, "src");
    if (src == NULL)
        goto error;

    decode = gst_element_factory_make("decodebin", "decode");
    if (decode == NULL)
        goto error;

    queue = gst_element_factory_make("queue", "queue_src");
    aqueue = gst_element_factory_make("queue", "aqueue");
    if (aqueue == NULL)
        goto error;

    vqueue = gst_element_factory_make("queue", "vqueue");
    if (vqueue == NULL)
        goto error;

    gst_bin_add_many(GST_BIN(bsrc), src, queue, decode, aqueue, vqueue,
                     NULL);
    gst_element_link_many(src, queue, decode, NULL);

    g_signal_connect(G_OBJECT(decode),
                     "new-decoded-pad",
                     G_CALLBACK(_decodebin_new_pad_cb), bsrc);

    g_signal_connect(G_OBJECT(decode),
                     "unknown-type",
                     G_CALLBACK(_decodebin_unknown_type_cb), pipe);

    src_pad = gst_element_get_pad(aqueue, "src");
    gst_element_add_pad(bsrc, gst_ghost_pad_new("src_audio", src_pad));
    gst_object_unref(src_pad);

    src_pad = gst_element_get_pad(vqueue, "src");
    gst_element_add_pad(bsrc, gst_ghost_pad_new("src_video", src_pad));
    gst_object_unref(src_pad);

    return bsrc;

  error:
    if (src != NULL) {
        gst_object_unref(src);
    }

    if (decode != NULL) {
        gst_object_unref(decode);
    }

    if (aqueue != NULL) {
        gst_object_unref(aqueue);
    }

    if (vqueue != NULL) {
        gst_object_unref(vqueue);
    }

    return NULL;
}

static void
_open_output(GMencoder * self, const gchar * uri)
{
    gchar         **i;
    GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE(self);

    i = g_strsplit(uri, "://", 0);
    if (strcmp(i[0], "fd") == 0) {
        priv->fd = atoi(i[1]);
    } else if (strcmp(i[0], "file") == 0) {
        if (g_file_test (i[1], G_FILE_TEST_EXISTS)) {
            g_assert (unlink (i[1]) == 0);
        }
        priv->fd = open(i[1], O_WRONLY | O_CREAT | O_TRUNC,
                        S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
    } else {
        g_warning("Output uri not supported");
    }

    g_strfreev(i);
}

static          gboolean
_pipeline_bus_cb(GstBus * bus, GstMessage * msg, gpointer user_data)
{
    GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE(user_data);

    switch (GST_MESSAGE_TYPE(msg)) {

    case GST_MESSAGE_STATE_CHANGED:
        {
            GstState        oldstate;
            GstState        newstate;
            GstState        pendingstate;


            gst_message_parse_state_changed(msg, &oldstate,
                                            &newstate, &pendingstate);

            if (pendingstate != GST_STATE_VOID_PENDING)
                break;

            if ((oldstate == GST_STATE_READY)
                && (newstate == GST_STATE_PAUSED)) {
                if (priv->ready)
                    g_signal_emit(user_data, g_mencoder_signals[PAUSED],
                                  0);
            } else if ((oldstate == GST_STATE_PAUSED)
                       && (newstate == GST_STATE_PLAYING)) {
                g_signal_emit(user_data, g_mencoder_signals[PLAYING], 0);
            } else if ((oldstate == GST_STATE_READY) &&
                       (newstate == GST_STATE_NULL)) {
                g_signal_emit(user_data, g_mencoder_signals[STOPED], 0);
            }
            break;
        }

    case GST_MESSAGE_ERROR:
        {
            GError         *error;
            gchar          *debug;
            gchar          *err_str;

            if (priv->tick_id != 0) {
                g_source_remove(priv->tick_id);
                priv->tick_id = 0;
            }

            gst_message_parse_error(msg, &error, &debug);
            err_str = g_strdup_printf("Error [%d] %s (%s)", error->code,
                                      error->message, debug);
            priv->ready = FALSE;
            g_signal_emit(user_data, g_mencoder_signals[ERROR], 0,
                          err_str);
            g_free(err_str);
            g_clear_error(&error);
            g_free(debug);
            break;
        }

    case GST_MESSAGE_EOS:
        priv->ready = FALSE;
        g_signal_emit(user_data, g_mencoder_signals[EOS], 0);
        break;

    case GST_MESSAGE_DURATION:
        {
            GstFormat       format;
            gint64          duration;
            gst_message_parse_duration(msg, &format, &duration);
            if (format == GST_FORMAT_BYTES)
                priv->duration = duration;
            break;
        }
    default:
        {
            break;
        }
    }
    return TRUE;
}



static void
_decodebin_new_pad_cb(GstElement * object,
                      GstPad * pad, gboolean flag, gpointer user_data)
{
    GstCaps        *caps;
    gchar          *str_caps = NULL;
    GstElement     *sink_element;
    GstPad         *sink_pad;

    caps = gst_pad_get_caps(pad);
    str_caps = gst_caps_to_string(caps);
    if (strstr(str_caps, "audio") != NULL) {
        sink_element = gst_bin_get_by_name(GST_BIN(user_data), "aqueue");
    } else if (strstr(str_caps, "video") != NULL) {
        sink_element = gst_bin_get_by_name(GST_BIN(user_data), "vqueue");
    } else {
        g_warning("invalid caps %s", str_caps);
    }

    sink_pad = gst_element_get_pad(sink_element, "sink");
    gst_pad_link(pad, sink_pad);

    gst_object_unref(sink_element);
    gst_object_unref(sink_pad);
    g_free(str_caps);
    gst_caps_unref(caps);
}

static void
_decodebin_unknown_type_cb(GstElement * object,
                           GstPad * pad, GstCaps * caps,
                           gpointer user_data)
{
    g_warning("Unknown Type");
    // priv->ready = FALSE;
}

static          gboolean
_tick_cb(gpointer user_data)
{
    GstFormat       format = GST_FORMAT_BYTES;
    gint64          cur = 0;

    GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE(user_data);

    if (priv->duration == 0) {
        gint64          d = 0;
        if (gst_element_query_duration(priv->src, &format, &d))
            priv->duration = d;
    }

    if (priv->duration != 0) {
        gst_element_query_position(priv->src, &format, &cur);
        g_print("PROGRESS:%lli\n", (99 * cur) / priv->duration);
    }

    return TRUE;
}