/* GStreamer interactive audioresample test

 * Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <stdlib.h>

#include <gst/gst.h>

static GstElement *

make_pipeline (gint type)

{

  GstElement *result;

  gchar *pstr;

  switch (type) {

    case 0:

      pstr = g_strdup_printf ("audiotestsrc ! audio/x-raw,rate=44100 ! "

          " audioresample ! capsfilter name=filter ! capssetter caps="

          "audio/x-raw,rate=44100 ! wavenc ! filesink location=test.wav");

      break;

    default:

      return NULL;

  }

  result = gst_parse_launch_full (pstr, NULL, GST_PARSE_FLAG_NONE, NULL);

  g_print ("created test %d: \"%s\"\n", type, pstr);

  g_free (pstr);

  return result;

}

typedef struct

{

  gint rate;

  GstElement *filter;

} Data;

static GstPadProbeReturn

have_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)

{

  Data *data = user_data;

  gchar *capsstr;

  GstCaps *caps;

  g_print ("resample to %d   \r", data->rate);

  capsstr = g_strdup_printf ("audio/x-raw, rate=(int)%d", data->rate);

  caps = gst_caps_from_string (capsstr);

  g_free (capsstr);

  g_object_set (data->filter, "caps", caps, NULL);

  gst_caps_unref (caps);

  data->rate += 100;

  if (data->rate > 128000)

    gst_element_post_message (data->filter,

        gst_message_new_application (GST_OBJECT (data->filter),

            gst_structure_new_empty ("my-message")));

  return GST_PAD_PROBE_OK;

}

int

main (int argc, char **argv)

{

  GstElement *pipe;

  GstMessage *message;

  GstPad *srcpad;

  Data data;

  gst_init (&argc, &argv);

  pipe = make_pipeline (0);

  if (pipe == NULL)

    return -1;

  data.rate = 1000;

  data.filter = gst_bin_get_by_name (GST_BIN (pipe), "filter");

  g_assert (data.filter);

  srcpad = gst_element_get_static_pad (data.filter, "src");

  gst_pad_add_probe (srcpad, GST_PAD_PROBE_TYPE_DATA_DOWNSTREAM, have_probe,

      &data, NULL);

  gst_object_unref (srcpad);

  gst_element_set_state (pipe, GST_STATE_PLAYING);

  while (TRUE) {

    message =

        gst_bus_poll (GST_ELEMENT_BUS (pipe),

        GST_MESSAGE_ERROR | GST_MESSAGE_APPLICATION, 50 * GST_MSECOND);

    if (message) {

      g_print ("got error           \n");

      gst_message_unref (message);

      break;

    }

  }

  gst_object_unref (data.filter);

  gst_element_set_state (pipe, GST_STATE_NULL);

  gst_object_unref (pipe);

  return 0;

}