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175 lines
4.5 KiB
C
175 lines
4.5 KiB
C
/* GStreamer
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*
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* Copyright (C) 2009 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 <gst/gst.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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typedef struct _App App;
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struct _App
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{
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GstElement *playbin;
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GstElement *textsink;
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GMainLoop *loop;
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};
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static App s_app;
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static gboolean
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bus_message (GstBus * bus, GstMessage * message, App * app)
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{
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GST_DEBUG ("got message %s",
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gst_message_type_get_name (GST_MESSAGE_TYPE (message)));
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switch (GST_MESSAGE_TYPE (message)) {
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case GST_MESSAGE_ERROR:
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{
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GError *gerror;
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gchar *debug;
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gst_message_parse_error (message, &gerror, &debug);
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gst_object_default_error (GST_MESSAGE_SRC (message), gerror, debug);
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g_error_free (gerror);
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g_free (debug);
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g_main_loop_quit (app->loop);
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break;
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}
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case GST_MESSAGE_WARNING:
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{
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GError *gerror;
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gchar *debug;
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gst_message_parse_warning (message, &gerror, &debug);
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gst_object_default_error (GST_MESSAGE_SRC (message), gerror, debug);
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g_error_free (gerror);
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g_free (debug);
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g_main_loop_quit (app->loop);
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break;
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}
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case GST_MESSAGE_EOS:
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g_message ("received EOS");
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g_main_loop_quit (app->loop);
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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 void
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have_subtitle (GstElement * appsink, App * app)
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{
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GstBuffer *buffer;
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/* get the buffer, we can also wakeup the mainloop to get the subtitle from
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* appsink in the mainloop */
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g_signal_emit_by_name (appsink, "pull-buffer", &buffer);
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if (buffer) {
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guint8 *data;
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gsize size;
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gint64 position;
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GstClock *clock;
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GstClockTime base_time, running_time;
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gst_element_query_position (appsink, GST_FORMAT_TIME, &position);
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clock = gst_element_get_clock (appsink);
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base_time = gst_element_get_base_time (appsink);
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running_time = gst_clock_get_time (clock) - base_time;
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gst_object_unref (clock);
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g_message ("received a subtitle at position %" GST_TIME_FORMAT
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", running_time %" GST_TIME_FORMAT, GST_TIME_ARGS (position),
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GST_TIME_ARGS (running_time));
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data = gst_buffer_map (buffer, &size, NULL, GST_MAP_READ);
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gst_util_dump_mem (data, size);
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gst_buffer_unmap (buffer, data, size);
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}
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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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App *app = &s_app;
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GstBus *bus;
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GstCaps *subcaps;
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gst_init (&argc, &argv);
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if (argc < 2) {
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g_print ("usage: %s <filename>\n", argv[0]);
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return -1;
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}
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/* create a mainloop to get messages */
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app->loop = g_main_loop_new (NULL, TRUE);
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app->playbin = gst_element_factory_make ("playbin2", NULL);
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g_assert (app->playbin);
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/* set appsink to get the subtitles */
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app->textsink = gst_element_factory_make ("appsink", "subtitle_sink");
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g_object_set (G_OBJECT (app->textsink), "emit-signals", TRUE, NULL);
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g_object_set (G_OBJECT (app->textsink), "ts-offset", 0 * GST_SECOND, NULL);
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g_signal_connect (app->textsink, "new-buffer", G_CALLBACK (have_subtitle),
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app);
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subcaps = gst_caps_from_string ("text/x-pango-markup; text/plain");
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g_object_set (G_OBJECT (app->textsink), "caps", subcaps, NULL);
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gst_caps_unref (subcaps);
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g_object_set (G_OBJECT (app->playbin), "text-sink", app->textsink, NULL);
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bus = gst_pipeline_get_bus (GST_PIPELINE (app->playbin));
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/* add watch for messages */
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gst_bus_add_watch (bus, (GstBusFunc) bus_message, app);
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/* set to read from appsrc */
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g_object_set (app->playbin, "uri", argv[1], NULL);
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/* go to playing and wait in a mainloop. */
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gst_element_set_state (app->playbin, GST_STATE_PLAYING);
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/* this mainloop is stopped when we receive an error or EOS */
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g_main_loop_run (app->loop);
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g_message ("stopping");
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gst_element_set_state (app->playbin, GST_STATE_NULL);
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gst_object_unref (bus);
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g_main_loop_unref (app->loop);
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return 0;
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}
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