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123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/* GStreamer interactive audioresample test
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* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include <gst/gst.h>
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static GstElement *
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make_pipeline (gint type)
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{
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GstElement *result;
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gchar *pstr;
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switch (type) {
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case 0:
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pstr = g_strdup_printf ("audiotestsrc ! audio/x-raw,rate=44100 ! "
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" audioresample ! capsfilter name=filter ! capssetter caps="
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"audio/x-raw,rate=44100 ! wavenc ! filesink location=test.wav");
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break;
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default:
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return NULL;
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}
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result = gst_parse_launch_full (pstr, NULL, GST_PARSE_FLAG_NONE, NULL);
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g_print ("created test %d: \"%s\"\n", type, pstr);
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g_free (pstr);
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return result;
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}
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typedef struct
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{
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gint rate;
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GstElement *filter;
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} Data;
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static GstPadProbeReturn
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have_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
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{
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Data *data = user_data;
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gchar *capsstr;
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GstCaps *caps;
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g_print ("resample to %d \r", data->rate);
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capsstr = g_strdup_printf ("audio/x-raw, rate=(int)%d", data->rate);
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caps = gst_caps_from_string (capsstr);
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g_free (capsstr);
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g_object_set (data->filter, "caps", caps, NULL);
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gst_caps_unref (caps);
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data->rate += 100;
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if (data->rate > 128000)
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gst_element_post_message (data->filter,
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gst_message_new_application (GST_OBJECT (data->filter),
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gst_structure_new_empty ("my-message")));
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return GST_PAD_PROBE_OK;
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}
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int
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main (int argc, char **argv)
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{
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GstElement *pipe;
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GstMessage *message;
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GstPad *srcpad;
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Data data;
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gst_init (&argc, &argv);
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pipe = make_pipeline (0);
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if (pipe == NULL)
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return -1;
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data.rate = 1000;
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data.filter = gst_bin_get_by_name (GST_BIN (pipe), "filter");
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g_assert (data.filter);
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srcpad = gst_element_get_static_pad (data.filter, "src");
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gst_pad_add_probe (srcpad, GST_PAD_PROBE_TYPE_DATA_DOWNSTREAM, have_probe,
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&data, NULL);
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gst_object_unref (srcpad);
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gst_element_set_state (pipe, GST_STATE_PLAYING);
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while (TRUE) {
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message =
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gst_bus_poll (GST_ELEMENT_BUS (pipe),
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GST_MESSAGE_ERROR | GST_MESSAGE_APPLICATION, 50 * GST_MSECOND);
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if (message) {
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g_print ("got error \n");
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gst_message_unref (message);
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break;
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}
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}
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gst_object_unref (data.filter);
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gst_element_set_state (pipe, GST_STATE_NULL);
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gst_object_unref (pipe);
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return 0;
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}
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