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185 lines
5.9 KiB
C
185 lines
5.9 KiB
C
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/*
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* GStreamer
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* Copyright (C) 2017 Vivia Nikolaidou <vivia@toolsonair.com>
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*
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* test-audiomixmatrix.c
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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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#include <gst/gst.h>
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#include <string.h>
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static gboolean
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message_cb (GstBus * bus, GstMessage * message, gpointer user_data)
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{
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switch (GST_MESSAGE_TYPE (message)) {
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case GST_MESSAGE_ERROR:{
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GError *err = NULL;
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gchar *debug = NULL;
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gst_message_parse_error (message, &err, &debug);
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gst_printerrln ("Error message received: %s", err->message);
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gst_printerrln ("Debug info: %s", debug);
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g_error_free (err);
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g_free (debug);
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}
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case GST_MESSAGE_EOS:
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g_main_loop_quit (user_data);
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break;
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default:
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break;
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}
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return TRUE;
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}
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static GstPadProbeReturn
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_event_received (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
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{
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GstCaps *caps;
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gchar *caps_str;
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GstEvent *event = GST_EVENT (info->data);
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if (GST_EVENT_TYPE (event) != GST_EVENT_CAPS)
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return GST_PAD_PROBE_OK;
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gst_event_parse_caps (event, &caps);
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if (!gst_caps_is_fixed (caps))
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return GST_PAD_PROBE_OK;
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caps_str = gst_caps_to_string (caps);
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g_print ("Caps received on %s: %s\n",
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GST_PAD_IS_SRC (pad) ? "source" : "sink", caps_str);
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g_free (caps_str);
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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 *audiotestsrc, *capsfilter, *audiomixmatrix, *audioconvert, *sink;
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GstPad *srcpad, *sinkpad;
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GstBus *bus;
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GMainLoop *loop;
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GstCaps *caps;
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GValue v2 = G_VALUE_INIT;
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GValue v3 = G_VALUE_INIT;
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GstElement *pipeline;
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GValue v = G_VALUE_INIT;
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gchar *serialized_matrix;
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gst_init (&argc, &argv);
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audiotestsrc = gst_element_factory_make ("audiotestsrc", "audiotestsrc");
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capsfilter = gst_element_factory_make ("capsfilter", "capsfilter");
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caps =
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gst_caps_from_string
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("audio/x-raw,channels=4,channel-mask=(bitmask)0,format=S32LE");
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g_object_set (capsfilter, "caps", caps, NULL);
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gst_caps_unref (caps);
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audiomixmatrix =
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gst_element_factory_make ("audiomixmatrix", "audiomixmatrix");
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g_object_set (audiomixmatrix, "in-channels", 4, NULL);
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g_object_set (audiomixmatrix, "out-channels", 2, NULL);
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g_object_set (audiomixmatrix, "channel-mask", 3, NULL);
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/* So the serialized matrix will be: < < 1, 0, 0, 0 >, < 0, 1, 0, 0 > > */
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g_value_init (&v, GST_TYPE_ARRAY);
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g_value_init (&v2, GST_TYPE_ARRAY);
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g_value_init (&v3, G_TYPE_DOUBLE);
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g_value_set_double (&v3, 1);
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gst_value_array_append_value (&v2, &v3);
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g_value_unset (&v3);
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g_value_init (&v3, G_TYPE_DOUBLE);
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g_value_set_double (&v3, 0);
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gst_value_array_append_value (&v2, &v3);
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g_value_unset (&v3);
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g_value_init (&v3, G_TYPE_DOUBLE);
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g_value_set_double (&v3, 0);
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gst_value_array_append_value (&v2, &v3);
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g_value_unset (&v3);
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g_value_init (&v3, G_TYPE_DOUBLE);
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g_value_set_double (&v3, 0);
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gst_value_array_append_value (&v2, &v3);
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g_value_unset (&v3);
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gst_value_array_append_value (&v, &v2);
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g_value_unset (&v2);
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g_value_init (&v2, GST_TYPE_ARRAY);
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g_value_init (&v3, G_TYPE_DOUBLE);
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g_value_set_double (&v3, 0);
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gst_value_array_append_value (&v2, &v3);
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g_value_unset (&v3);
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g_value_init (&v3, G_TYPE_DOUBLE);
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g_value_set_double (&v3, 1);
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gst_value_array_append_value (&v2, &v3);
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g_value_unset (&v3);
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g_value_init (&v3, G_TYPE_DOUBLE);
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g_value_set_double (&v3, 0);
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gst_value_array_append_value (&v2, &v3);
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g_value_unset (&v3);
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g_value_init (&v3, G_TYPE_DOUBLE);
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g_value_set_double (&v3, 0);
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gst_value_array_append_value (&v2, &v3);
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g_value_unset (&v3);
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gst_value_array_append_value (&v, &v2);
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g_value_unset (&v2);
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g_object_set_property (G_OBJECT (audiomixmatrix), "matrix", &v);
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/* Alternatively: gst_util_set_object_arg (audiomixmatrix, "matrix", "< < 1, 0> ..."); */
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serialized_matrix = gst_value_serialize (&v);
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gst_printerrln ("Serialized matrix: %s", serialized_matrix);
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g_free (serialized_matrix);
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g_value_unset (&v);
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audioconvert = gst_element_factory_make ("audioconvert", "audioconvert");
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sink = gst_element_factory_make ("autoaudiosink", "sink");
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pipeline = gst_pipeline_new ("pipe");
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gst_bin_add_many (GST_BIN (pipeline), audiotestsrc, capsfilter,
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audiomixmatrix, audioconvert, sink, NULL);
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gst_element_link_many (audiotestsrc, capsfilter,
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audiomixmatrix, audioconvert, sink, NULL);
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srcpad = gst_element_get_static_pad (audiomixmatrix, "src");
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gst_pad_add_probe (srcpad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
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_event_received, NULL, NULL);
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gst_object_unref (srcpad);
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sinkpad = gst_element_get_static_pad (audiomixmatrix, "sink");
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gst_pad_add_probe (sinkpad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
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_event_received, NULL, NULL);
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gst_object_unref (sinkpad);
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if (gst_element_set_state (pipeline, GST_STATE_PLAYING) ==
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GST_STATE_CHANGE_FAILURE) {
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g_printerr ("ERROR: Could not change state in pipeline!\n");
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gst_object_unref (pipeline);
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return 1;
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}
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bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
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loop = g_main_loop_new (NULL, FALSE);
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gst_bus_add_signal_watch (bus);
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g_signal_connect (G_OBJECT (bus), "message", G_CALLBACK (message_cb), loop);
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g_main_loop_run (loop);
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (bus);
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gst_object_unref (pipeline);
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return 0;
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}
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