gstreamer/tests/examples/wpe/wpe.c
Philippe Normand f4bc5c6c65 wpe: Implement audio support
The wpesrc bin now exposes "sometimes" audio src pads, one for every PCM audio
stream created by WPEWebKit.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2252>
2021-05-19 13:41:15 +00:00

162 lines
4.5 KiB
C

/* Copyright (C) <2018, 2019> Philippe Normand <philn@igalia.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.
*/
#include <gst/gst.h>
static GMainLoop *loop;
static GstElement *pipe1;
static GstBus *bus1;
static gboolean
_bus_watch (GstBus * bus, GstMessage * msg, GstElement * pipe)
{
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_STATE_CHANGED:
if (GST_ELEMENT (msg->src) == pipe) {
GstState old, new, pending;
gst_message_parse_state_changed (msg, &old, &new, &pending);
{
gchar *dump_name = g_strconcat ("state_changed-",
gst_element_state_get_name (old), "_",
gst_element_state_get_name (new), NULL);
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (msg->src),
GST_DEBUG_GRAPH_SHOW_ALL, dump_name);
g_free (dump_name);
}
}
break;
case GST_MESSAGE_ERROR:{
GError *err = NULL;
gchar *dbg_info = NULL;
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipe),
GST_DEBUG_GRAPH_SHOW_ALL, "error");
gst_message_parse_error (msg, &err, &dbg_info);
g_printerr ("ERROR from element %s: %s\n",
GST_OBJECT_NAME (msg->src), err->message);
g_printerr ("Debugging info: %s\n", (dbg_info) ? dbg_info : "none");
g_error_free (err);
g_free (dbg_info);
g_main_loop_quit (loop);
break;
}
case GST_MESSAGE_EOS:{
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipe),
GST_DEBUG_GRAPH_SHOW_ALL, "eos");
g_print ("EOS received\n");
g_main_loop_quit (loop);
break;
}
default:
break;
}
return TRUE;
}
static void
_wpe_pad_added (GstElement * src, GstPad * new_pad, GstElement * pipe)
{
GstElement *out;
GstPad *sink;
gchar *name = gst_pad_get_name (new_pad);
gchar *bin_name;
if (g_str_has_prefix (name, "audio")) {
out =
gst_parse_bin_from_description
("audioresample ! audioconvert ! autoaudiosink", TRUE, NULL);
} else {
out =
gst_parse_bin_from_description
("queue ! glcolorconvert ! gtkglsink enable-last-sample=0", TRUE, NULL);
}
bin_name = g_strdup_printf ("%s-bin", name);
g_free (name);
gst_object_set_name (GST_OBJECT_CAST (out), bin_name);
g_free (bin_name);
gst_bin_add (GST_BIN (pipe), out);
sink = out->sinkpads->data;
gst_pad_link (new_pad, sink);
gst_element_sync_state_with_parent (out);
}
static void
_wpe_pad_removed (GstElement * src, GstPad * pad, GstElement * pipe)
{
gchar *name = gst_pad_get_name (pad);
gchar *bin_name = g_strdup_printf ("%s-bin", name);
GstElement *bin = gst_bin_get_by_name (GST_BIN_CAST (pipe), bin_name);
if (GST_IS_ELEMENT (bin)) {
gst_bin_remove (GST_BIN_CAST (pipe), bin);
gst_element_set_state (bin, GST_STATE_NULL);
}
g_free (name);
g_free (bin_name);
}
int
main (int argc, char *argv[])
{
GstElement *src;
if (argc < 2) {
g_printerr ("Usage: %s <website url>\n", argv[0]);
return 1;
}
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
pipe1 = gst_pipeline_new (NULL);
bus1 = gst_pipeline_get_bus (GST_PIPELINE (pipe1));
gst_bus_add_watch (bus1, (GstBusFunc) _bus_watch, pipe1);
src = gst_element_factory_make ("wpesrc", NULL);
gst_bin_add (GST_BIN_CAST (pipe1), src);
gst_element_set_state (GST_ELEMENT (pipe1), GST_STATE_READY);
g_signal_connect (src, "pad-added", G_CALLBACK (_wpe_pad_added), pipe1);
g_signal_connect (src, "pad-removed", G_CALLBACK (_wpe_pad_removed), pipe1);
g_object_set (src, "location", argv[1], NULL);
g_print ("Starting pipeline\n");
gst_element_set_state (GST_ELEMENT (pipe1), GST_STATE_PLAYING);
g_main_loop_run (loop);
gst_element_set_state (GST_ELEMENT (pipe1), GST_STATE_NULL);
g_print ("Pipeline stopped\n");
gst_bus_remove_watch (bus1);
gst_object_unref (bus1);
gst_object_unref (pipe1);
gst_deinit ();
return 0;
}