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/* GStreamer
*
* Copyright (C) 2009 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 <gst/gst.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
typedef struct _App App;
struct _App
{
GstElement *playbin;
GstElement *textsink;
GMainLoop *loop;
};
static App s_app;
static gboolean
bus_message (GstBus * bus, GstMessage * message, App * app)
{
GST_DEBUG ("got message %s",
gst_message_type_get_name (GST_MESSAGE_TYPE (message)));
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_ERROR:
{
GError *gerror;
gchar *debug;
gst_message_parse_error (message, &gerror, &debug);
gst_object_default_error (GST_MESSAGE_SRC (message), gerror, debug);
g_error_free (gerror);
g_free (debug);
g_main_loop_quit (app->loop);
break;
}
case GST_MESSAGE_WARNING:
{
GError *gerror;
gchar *debug;
gst_message_parse_warning (message, &gerror, &debug);
gst_object_default_error (GST_MESSAGE_SRC (message), gerror, debug);
g_error_free (gerror);
g_free (debug);
break;
}
case GST_MESSAGE_EOS:
g_message ("received EOS");
g_main_loop_quit (app->loop);
break;
default:
break;
}
return TRUE;
}
static GstFlowReturn
have_subtitle (GstElement * appsink, App * app)
{
GstBuffer *buffer;
GstSample *sample;
/* get the buffer, we can also wakeup the mainloop to get the subtitle from
* appsink in the mainloop */
g_signal_emit_by_name (appsink, "pull-sample", &sample);
if (sample) {
GstMapInfo map;
gint64 position;
GstClock *clock;
GstClockTime base_time, running_time;
buffer = gst_sample_get_buffer (sample);
gst_element_query_position (appsink, GST_FORMAT_TIME, &position);
clock = gst_element_get_clock (appsink);
base_time = gst_element_get_base_time (appsink);
running_time = gst_clock_get_time (clock) - base_time;
gst_object_unref (clock);
g_message ("received a subtitle at position %" GST_TIME_FORMAT
", running_time %" GST_TIME_FORMAT, GST_TIME_ARGS (position),
GST_TIME_ARGS (running_time));
gst_buffer_map (buffer, &map, GST_MAP_READ);
gst_util_dump_mem (map.data, map.size);
gst_buffer_unmap (buffer, &map);
gst_sample_unref (sample);
}
return GST_FLOW_OK;
}
int
main (int argc, char *argv[])
{
App *app = &s_app;
GstBus *bus;
GstCaps *subcaps;
gst_init (&argc, &argv);
if (argc < 2) {
g_print ("usage: %s <uri> [<suburi>]\n", argv[0]);
return -1;
}
/* create a mainloop to get messages */
app->loop = g_main_loop_new (NULL, TRUE);
app->playbin = gst_element_factory_make ("playbin", NULL);
g_assert (app->playbin);
/* set appsink to get the subtitles */
app->textsink = gst_element_factory_make ("appsink", "subtitle_sink");
g_object_set (G_OBJECT (app->textsink), "emit-signals", TRUE, NULL);
g_object_set (G_OBJECT (app->textsink), "ts-offset", 0 * GST_SECOND, NULL);
g_signal_connect (app->textsink, "new-sample", G_CALLBACK (have_subtitle),
app);
subcaps = gst_caps_from_string ("text/x-raw, format={ utf8, pango-markup }");
g_object_set (G_OBJECT (app->textsink), "caps", subcaps, NULL);
gst_caps_unref (subcaps);
g_object_set (G_OBJECT (app->playbin), "text-sink", app->textsink, NULL);
bus = gst_pipeline_get_bus (GST_PIPELINE (app->playbin));
/* add watch for messages */
gst_bus_add_watch (bus, (GstBusFunc) bus_message, app);
/* set to read from appsrc */
g_object_set (app->playbin, "uri", argv[1], NULL);
if (argc > 2)
g_object_set (app->playbin, "suburi", argv[2], NULL);
/* go to playing and wait in a mainloop. */
gst_element_set_state (app->playbin, GST_STATE_PLAYING);
/* this mainloop is stopped when we receive an error or EOS */
g_main_loop_run (app->loop);
g_message ("stopping");
gst_element_set_state (app->playbin, GST_STATE_NULL);
gst_object_unref (bus);
g_main_loop_unref (app->loop);
return 0;
}
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