gstreamer/subprojects/gst-plugins-base/tests/interactive/test-resample.c

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2016-02-04 14:22:39 +00:00
/* 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;
}