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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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GST_STIME_FORMAT is more appropriate for GstClockTimeDiff since it can handle negative values better. https://bugzilla.gnome.org/show_bug.cgi?id=757480
556 lines
14 KiB
C
556 lines
14 KiB
C
/* GStreamer
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*
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* scrubby.c: sample application to change the playback speed dynamically
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*
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* Copyright (C) 2005 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 <glib.h>
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#include <gtk/gtk.h>
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#include <gst/gst.h>
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#include <string.h>
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GST_DEBUG_CATEGORY_STATIC (scrubby_debug);
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#define GST_CAT_DEFAULT (scrubby_debug)
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static GstElement *pipeline;
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static gint64 position;
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static gint64 duration;
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static GtkAdjustment *adjustment;
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static GtkWidget *hscale;
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static GtkAdjustment *sadjustment;
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static GtkWidget *shscale;
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static gboolean verbose = FALSE;
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static guint bus_watch = 0;
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static guint update_id = 0;
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static guint changed_id = 0;
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static guint schanged_id = 0;
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#define SOURCE "filesrc"
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#define ASINK "autoaudiosink"
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//#define ASINK "alsasink"
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//#define ASINK "osssink"
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#define VSINK "autovideosink"
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//#define VSINK "xvimagesink"
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//#define VSINK "ximagesink"
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//#define VSINK "aasink"
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//#define VSINK "cacasink"
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#define RANGE_PREC 10000
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#define SEGMENT_LEN 100
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#define UPDATE_INTERVAL 500
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static gdouble prev_range = -1.0;
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static GstClockTime prev_time = GST_CLOCK_TIME_NONE;
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static gdouble cur_range;
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static GstClockTime cur_time;
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static GstClockTimeDiff diff;
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static gdouble cur_speed = 1.0;
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typedef struct
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{
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const gchar *padname;
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GstPad *target;
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GstElement *bin;
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}
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dyn_link;
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static GstElement *
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gst_element_factory_make_or_warn (const gchar * type, const gchar * name)
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{
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GstElement *element = gst_element_factory_make (type, name);
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if (!element) {
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g_warning ("Failed to create element %s of type %s", name, type);
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}
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return element;
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}
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static GstElement *
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make_wav_pipeline (const gchar * location)
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{
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GstElement *pipeline;
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GstElement *src, *decoder, *audiosink;
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pipeline = gst_pipeline_new ("app");
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src = gst_element_factory_make_or_warn (SOURCE, "src");
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decoder = gst_element_factory_make_or_warn ("wavparse", "decoder");
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audiosink = gst_element_factory_make_or_warn (ASINK, "sink");
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g_object_set (G_OBJECT (src), "location", location, NULL);
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gst_bin_add_many (GST_BIN (pipeline), src, decoder, audiosink, NULL);
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gst_element_link_many (src, decoder, audiosink, NULL);
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return pipeline;
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}
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static GstElement *
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make_playerbin_pipeline (const gchar * location)
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{
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GstElement *player;
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const gchar *uri = g_filename_to_uri (location, NULL, NULL);
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player = gst_element_factory_make ("playbin", "player");
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g_assert (player);
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g_object_set (G_OBJECT (player), "uri", uri, NULL);
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return player;
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}
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static gchar *
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format_value (GtkScale * scale, gdouble value)
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{
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gint64 real;
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gint64 seconds;
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gint64 subseconds;
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real = value * duration / RANGE_PREC;
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seconds = (gint64) real / GST_SECOND;
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subseconds = (gint64) real / (GST_SECOND / RANGE_PREC);
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return g_strdup_printf ("%02" G_GINT64_FORMAT ":%02" G_GINT64_FORMAT ":%02"
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G_GINT64_FORMAT, seconds / 60, seconds % 60, subseconds % 100);
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}
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static gboolean
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update_scale (gpointer data)
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{
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position = 0;
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duration = 0;
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gst_element_query_position (pipeline, GST_FORMAT_TIME, &position);
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gst_element_query_duration (pipeline, GST_FORMAT_TIME, &duration);
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if (position >= duration)
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duration = position;
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if (duration > 0) {
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gtk_adjustment_set_value (adjustment,
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position * (gdouble) RANGE_PREC / duration);
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gtk_widget_queue_draw (hscale);
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}
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return TRUE;
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}
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static void
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speed_cb (GtkWidget * widget)
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{
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GstEvent *s_event;
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gboolean res;
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GST_DEBUG ("speed change");
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cur_speed = gtk_range_get_value (GTK_RANGE (widget));
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if (cur_speed == 0.0)
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return;
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s_event = gst_event_new_seek (cur_speed,
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GST_FORMAT_TIME, 0, GST_SEEK_TYPE_NONE, -1, GST_SEEK_TYPE_NONE, -1);
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res = gst_element_send_event (pipeline, s_event);
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if (!res)
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g_print ("speed change failed\n");
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}
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static gboolean do_seek (GtkWidget * widget, gboolean flush, gboolean segment);
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static void
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seek_cb (GtkWidget * widget)
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{
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if (changed_id) {
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GST_DEBUG ("seek because of slider move");
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if (do_seek (widget, TRUE, TRUE)) {
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g_signal_handler_disconnect (hscale, changed_id);
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changed_id = 0;
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}
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}
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}
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static gboolean
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do_seek (GtkWidget * widget, gboolean flush, gboolean segment)
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{
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gint64 start, stop;
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gboolean res = FALSE;
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GstEvent *s_event;
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gdouble rate;
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GTimeVal tv;
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gboolean valid;
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gdouble new_range;
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if (segment)
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new_range = gtk_range_get_value (GTK_RANGE (widget));
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else {
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new_range = (gdouble) RANGE_PREC;
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cur_time = -1;
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}
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valid = prev_time != -1;
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GST_DEBUG ("flush %d, segment %d, valid %d", flush, segment, valid);
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if (new_range == cur_range)
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return FALSE;
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prev_time = cur_time;
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prev_range = cur_range;
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cur_range = new_range;
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g_get_current_time (&tv);
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cur_time = GST_TIMEVAL_TO_TIME (tv);
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if (!valid)
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return FALSE;
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GST_DEBUG ("cur: %lf, %" GST_TIME_FORMAT, cur_range,
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GST_TIME_ARGS (cur_time));
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GST_DEBUG ("prev: %lf, %" GST_TIME_FORMAT, prev_range,
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GST_TIME_ARGS (prev_time));
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diff = cur_time - prev_time;
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GST_DEBUG ("diff: %" GST_STIME_FORMAT, GST_STIME_ARGS (diff));
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start = prev_range * duration / RANGE_PREC;
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/* play 50 milliseconds */
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stop = segment ? cur_range * duration / RANGE_PREC : duration;
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if (start == stop)
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return FALSE;
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if (segment)
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rate = (stop - start) / (gdouble) diff;
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else
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rate = cur_speed;
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if (start > stop) {
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gint64 tmp;
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tmp = start;
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start = stop;
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stop = tmp;
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}
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if (rate == 0.0)
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return TRUE;
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GST_DEBUG ("seek to %" GST_TIME_FORMAT " -- %" GST_TIME_FORMAT ", rate %lf"
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" on element %s",
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GST_TIME_ARGS (start), GST_TIME_ARGS (stop), rate,
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GST_ELEMENT_NAME (pipeline));
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s_event = gst_event_new_seek (rate,
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GST_FORMAT_TIME,
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(flush ? GST_SEEK_FLAG_FLUSH : 0) |
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(segment ? GST_SEEK_FLAG_SEGMENT : 0),
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GST_SEEK_TYPE_SET, start, GST_SEEK_TYPE_SET, stop);
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res = gst_element_send_event (pipeline, s_event);
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if (!res)
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g_print ("seek failed\n");
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gst_element_get_state (pipeline, NULL, NULL, GST_CLOCK_TIME_NONE);
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return TRUE;
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}
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static gboolean
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start_seek (GtkWidget * widget, GdkEventButton * event, gpointer user_data)
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{
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if (update_id) {
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g_source_remove (update_id);
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update_id = 0;
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}
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if (changed_id == 0) {
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changed_id =
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g_signal_connect (hscale, "value_changed", G_CALLBACK (seek_cb),
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pipeline);
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}
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GST_DEBUG ("start seek");
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return FALSE;
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}
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static gboolean
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stop_seek (GtkWidget * widget, gpointer user_data)
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{
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update_id =
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g_timeout_add (UPDATE_INTERVAL, (GSourceFunc) update_scale, pipeline);
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GST_DEBUG ("stop seek");
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if (changed_id) {
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g_signal_handler_disconnect (hscale, changed_id);
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changed_id = 0;
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}
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do_seek (hscale, FALSE, FALSE);
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return FALSE;
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}
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static void
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play_cb (GtkButton * button, gpointer data)
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{
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GstState state;
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gst_element_get_state (pipeline, &state, NULL, GST_CLOCK_TIME_NONE);
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if (state != GST_STATE_PLAYING) {
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g_print ("PLAY pipeline\n");
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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update_id =
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g_timeout_add (UPDATE_INTERVAL, (GSourceFunc) update_scale, pipeline);
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}
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}
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static void
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pause_cb (GtkButton * button, gpointer data)
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{
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GstState state;
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gst_element_get_state (pipeline, &state, NULL, GST_CLOCK_TIME_NONE);
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if (state != GST_STATE_PAUSED) {
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g_print ("PAUSE pipeline\n");
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gst_element_set_state (pipeline, GST_STATE_PAUSED);
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g_source_remove (update_id);
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}
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}
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static void
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stop_cb (GtkButton * button, gpointer data)
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{
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GstState state;
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gst_element_get_state (pipeline, &state, NULL, GST_CLOCK_TIME_NONE);
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if (state != GST_STATE_READY) {
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g_print ("READY pipeline\n");
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gst_element_set_state (pipeline, GST_STATE_READY);
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/* position and speed return to their default values */
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gtk_adjustment_set_value (adjustment, 0.0);
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gtk_adjustment_set_value (sadjustment, 1.0);
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g_source_remove (update_id);
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}
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}
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static void
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print_message (GstMessage * message)
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{
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const GstStructure *s;
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s = gst_message_get_structure (message);
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g_print ("Got Message from element \"%s\"\n",
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GST_STR_NULL (GST_ELEMENT_NAME (GST_MESSAGE_SRC (message))));
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if (s) {
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gchar *sstr;
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sstr = gst_structure_to_string (s);
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g_print ("%s\n", sstr);
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g_free (sstr);
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}
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}
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static gboolean
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bus_message (GstBus * bus, GstMessage * message, gpointer data)
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{
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switch (GST_MESSAGE_TYPE (message)) {
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case GST_MESSAGE_EOS:
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g_print ("EOS\n");
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break;
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case GST_MESSAGE_ERROR:
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case GST_MESSAGE_WARNING:
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print_message (message);
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break;
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case GST_MESSAGE_SEGMENT_START:
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break;
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case GST_MESSAGE_SEGMENT_DONE:
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GST_DEBUG ("segment_done, doing next seek");
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if (!do_seek (hscale, FALSE, update_id == 0)) {
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if (changed_id == 0) {
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changed_id =
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g_signal_connect (hscale, "value_changed", G_CALLBACK (seek_cb),
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pipeline);
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}
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}
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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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typedef struct
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{
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const gchar *name;
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GstElement *(*func) (const gchar * location);
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}
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Pipeline;
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static Pipeline pipelines[] = {
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{"wav", make_wav_pipeline},
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{"playerbin", make_playerbin_pipeline},
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{NULL, NULL},
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};
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#define NUM_TYPES ((sizeof (pipelines) / sizeof (Pipeline)) - 1)
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static void
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print_usage (int argc, char **argv)
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{
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gint i;
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g_print ("usage: %s <type> <filename>\n", argv[0]);
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g_print (" possible types:\n");
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for (i = 0; i < NUM_TYPES; i++) {
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g_print (" %d = %s\n", i, pipelines[i].name);
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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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GtkWidget *window, *hbox, *vbox, *play_button, *pause_button, *stop_button;
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GstBus *bus;
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GOptionEntry options[] = {
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{"verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose,
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"Verbose properties", NULL},
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{NULL}
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};
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gint type;
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GOptionContext *ctx;
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GError *err = NULL;
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ctx = g_option_context_new ("seek");
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g_option_context_add_main_entries (ctx, options, NULL);
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g_option_context_add_group (ctx, gst_init_get_option_group ());
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if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
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g_print ("Error initializing: %s\n", err->message);
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g_option_context_free (ctx);
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g_clear_error (&err);
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exit (1);
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}
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GST_DEBUG_CATEGORY_INIT (scrubby_debug, "scrubby", 0, "scrubby example");
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gtk_init (&argc, &argv);
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if (argc != 3) {
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print_usage (argc, argv);
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exit (-1);
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}
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type = atoi (argv[1]);
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if (type < 0 || type >= NUM_TYPES) {
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print_usage (argc, argv);
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exit (-1);
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}
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pipeline = pipelines[type].func (argv[2]);
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g_assert (pipeline);
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/* initialize gui elements ... */
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
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vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
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play_button = gtk_button_new_with_label ("play");
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pause_button = gtk_button_new_with_label ("pause");
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stop_button = gtk_button_new_with_label ("stop");
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adjustment =
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GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, (gdouble) RANGE_PREC, 0.1,
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1.0, 1.0));
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hscale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adjustment);
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gtk_scale_set_digits (GTK_SCALE (hscale), 2);
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sadjustment =
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GTK_ADJUSTMENT (gtk_adjustment_new (1.0, 0.0, 5.0, 0.1, 1.0, 0.0));
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shscale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, sadjustment);
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gtk_scale_set_digits (GTK_SCALE (shscale), 2);
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schanged_id =
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g_signal_connect (shscale, "value_changed", G_CALLBACK (speed_cb),
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pipeline);
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g_signal_connect (hscale, "button_press_event", G_CALLBACK (start_seek),
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pipeline);
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g_signal_connect (hscale, "button_release_event", G_CALLBACK (stop_seek),
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pipeline);
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g_signal_connect (hscale, "format_value", G_CALLBACK (format_value),
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pipeline);
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/* do the packing stuff ... */
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gtk_window_set_default_size (GTK_WINDOW (window), 96, 96);
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gtk_container_add (GTK_CONTAINER (window), vbox);
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gtk_container_add (GTK_CONTAINER (vbox), hbox);
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gtk_box_pack_start (GTK_BOX (hbox), play_button, FALSE, FALSE, 2);
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gtk_box_pack_start (GTK_BOX (hbox), pause_button, FALSE, FALSE, 2);
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gtk_box_pack_start (GTK_BOX (hbox), stop_button, FALSE, FALSE, 2);
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gtk_box_pack_start (GTK_BOX (vbox), hscale, TRUE, TRUE, 2);
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gtk_box_pack_start (GTK_BOX (vbox), shscale, TRUE, TRUE, 2);
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/* connect things ... */
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g_signal_connect (G_OBJECT (play_button), "clicked", G_CALLBACK (play_cb),
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pipeline);
|
|
g_signal_connect (G_OBJECT (pause_button), "clicked", G_CALLBACK (pause_cb),
|
|
pipeline);
|
|
g_signal_connect (G_OBJECT (stop_button), "clicked", G_CALLBACK (stop_cb),
|
|
pipeline);
|
|
g_signal_connect (G_OBJECT (window), "delete_event", gtk_main_quit, NULL);
|
|
|
|
/* show the gui. */
|
|
gtk_widget_show_all (window);
|
|
|
|
if (verbose) {
|
|
g_signal_connect (pipeline, "deep_notify",
|
|
G_CALLBACK (gst_object_default_deep_notify), NULL);
|
|
}
|
|
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
|
|
g_assert (bus);
|
|
|
|
bus_watch = gst_bus_add_watch_full (bus,
|
|
G_PRIORITY_HIGH, bus_message, pipeline, NULL);
|
|
|
|
gtk_main ();
|
|
|
|
g_print ("NULL pipeline\n");
|
|
gst_element_set_state (pipeline, GST_STATE_NULL);
|
|
|
|
gst_object_unref (bus);
|
|
|
|
g_print ("free pipeline\n");
|
|
gst_object_unref (pipeline);
|
|
|
|
return 0;
|
|
}
|