#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) {

        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");