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602 lines
16 KiB
C
602 lines
16 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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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/**
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* SECTION:element-aasink
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* @title: aasink
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* @see_also: #GstCACASink
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*
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* Displays video as b/w ascii art.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 filesrc location=test.avi ! decodebin ! videoconvert ! aasink
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* ]| This pipeline renders a video to ascii art into a separate window.
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* |[
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* gst-launch-1.0 filesrc location=test.avi ! decodebin ! videoconvert ! aasink driver=curses
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* ]| This pipeline renders a video to ascii art into the current terminal.
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*
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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 <string.h>
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#include <sys/time.h>
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#include <gst/video/gstvideometa.h>
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#include "gstaasink.h"
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#include "gstaatv.h"
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/* aasink signals and args */
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enum
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{
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LAST_SIGNAL
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};
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enum
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{
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PROP_0,
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PROP_WIDTH,
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PROP_HEIGHT,
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PROP_DRIVER,
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PROP_DITHER,
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PROP_BRIGHTNESS,
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PROP_CONTRAST,
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PROP_GAMMA,
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PROP_INVERSION,
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PROP_RANDOMVAL,
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PROP_FRAMES_DISPLAYED,
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PROP_FRAME_TIME
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};
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420"))
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);
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static GstCaps *gst_aasink_fixate (GstBaseSink * bsink, GstCaps * caps);
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static gboolean gst_aasink_setcaps (GstBaseSink * bsink, GstCaps * caps);
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static void gst_aasink_get_times (GstBaseSink * bsink, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end);
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static gboolean gst_aasink_propose_allocation (GstBaseSink * bsink,
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GstQuery * query);
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static GstFlowReturn gst_aasink_show_frame (GstVideoSink * videosink,
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GstBuffer * buffer);
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static void gst_aasink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_aasink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn gst_aasink_change_state (GstElement * element,
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GstStateChange transition);
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#define gst_aasink_parent_class parent_class
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G_DEFINE_TYPE (GstAASink, gst_aasink, GST_TYPE_VIDEO_SINK);
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#define GST_TYPE_AADRIVERS (gst_aasink_drivers_get_type())
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static GType
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gst_aasink_drivers_get_type (void)
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{
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static GType driver_type = 0;
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if (!driver_type) {
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GEnumValue *drivers;
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const struct aa_driver *driver;
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gint n_drivers;
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gint i;
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for (n_drivers = 0; aa_drivers[n_drivers]; n_drivers++) {
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/* count number of drivers */
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}
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drivers = g_new0 (GEnumValue, n_drivers + 1);
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for (i = 0; i < n_drivers; i++) {
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driver = aa_drivers[i];
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drivers[i].value = i;
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drivers[i].value_name = g_strdup (driver->name);
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drivers[i].value_nick = g_utf8_strdown (driver->shortname, -1);
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}
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drivers[i].value = 0;
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drivers[i].value_name = NULL;
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drivers[i].value_nick = NULL;
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driver_type = g_enum_register_static ("GstAASinkDrivers", drivers);
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}
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return driver_type;
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}
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#define GST_TYPE_AADITHER (gst_aasink_dither_get_type())
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static GType
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gst_aasink_dither_get_type (void)
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{
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static GType dither_type = 0;
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if (!dither_type) {
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GEnumValue *ditherers;
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gint n_ditherers;
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gint i;
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for (n_ditherers = 0; aa_dithernames[n_ditherers]; n_ditherers++) {
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/* count number of ditherers */
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}
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ditherers = g_new0 (GEnumValue, n_ditherers + 1);
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for (i = 0; i < n_ditherers; i++) {
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ditherers[i].value = i;
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ditherers[i].value_name = g_strdup (aa_dithernames[i]);
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ditherers[i].value_nick =
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g_strdelimit (g_strdup (aa_dithernames[i]), " _", '-');
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}
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ditherers[i].value = 0;
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ditherers[i].value_name = NULL;
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ditherers[i].value_nick = NULL;
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dither_type = g_enum_register_static ("GstAASinkDitherers", ditherers);
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}
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return dither_type;
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}
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static void
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gst_aasink_class_init (GstAASinkClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseSinkClass *gstbasesink_class;
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GstVideoSinkClass *gstvideosink_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstbasesink_class = (GstBaseSinkClass *) klass;
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gstvideosink_class = (GstVideoSinkClass *) klass;
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gobject_class->set_property = gst_aasink_set_property;
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gobject_class->get_property = gst_aasink_get_property;
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/* FIXME: add long property descriptions */
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_WIDTH,
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g_param_spec_int ("width", "width", "width", G_MININT, G_MAXINT, 0,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HEIGHT,
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g_param_spec_int ("height", "height", "height", G_MININT, G_MAXINT, 0,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DRIVER,
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g_param_spec_enum ("driver", "driver", "driver", GST_TYPE_AADRIVERS, 0,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DITHER,
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g_param_spec_enum ("dither", "dither", "dither", GST_TYPE_AADITHER, 0,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BRIGHTNESS,
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g_param_spec_int ("brightness", "brightness", "brightness", G_MININT,
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G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CONTRAST,
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g_param_spec_int ("contrast", "contrast", "contrast", G_MININT, G_MAXINT,
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0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_GAMMA,
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g_param_spec_float ("gamma", "gamma", "gamma", 0.0, 5.0, 1.0,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_INVERSION,
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g_param_spec_boolean ("inversion", "inversion", "inversion", TRUE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RANDOMVAL,
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g_param_spec_int ("randomval", "randomval", "randomval", G_MININT,
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G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass),
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PROP_FRAMES_DISPLAYED, g_param_spec_int ("frames-displayed",
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"frames displayed", "frames displayed", G_MININT, G_MAXINT, 0,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FRAME_TIME,
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g_param_spec_int ("frame-time", "frame time", "frame time", G_MININT,
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G_MAXINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
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gst_element_class_set_static_metadata (gstelement_class,
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"ASCII art video sink", "Sink/Video", "An ASCII art videosink",
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"Wim Taymans <wim.taymans@chello.be>");
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gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_aasink_change_state);
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gstbasesink_class->fixate = GST_DEBUG_FUNCPTR (gst_aasink_fixate);
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gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_aasink_setcaps);
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gstbasesink_class->get_times = GST_DEBUG_FUNCPTR (gst_aasink_get_times);
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gstbasesink_class->propose_allocation =
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GST_DEBUG_FUNCPTR (gst_aasink_propose_allocation);
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gstvideosink_class->show_frame = GST_DEBUG_FUNCPTR (gst_aasink_show_frame);
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gst_type_mark_as_plugin_api (GST_TYPE_AADRIVERS, 0);
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gst_type_mark_as_plugin_api (GST_TYPE_AADITHER, 0);
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}
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static GstCaps *
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gst_aasink_fixate (GstBaseSink * bsink, GstCaps * caps)
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{
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GstStructure *structure;
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caps = gst_caps_make_writable (caps);
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structure = gst_caps_get_structure (caps, 0);
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gst_structure_fixate_field_nearest_int (structure, "width", 320);
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gst_structure_fixate_field_nearest_int (structure, "height", 240);
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gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
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caps = GST_BASE_SINK_CLASS (parent_class)->fixate (bsink, caps);
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return caps;
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}
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static gboolean
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gst_aasink_setcaps (GstBaseSink * basesink, GstCaps * caps)
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{
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GstAASink *aasink;
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GstVideoInfo info;
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aasink = GST_AASINK (basesink);
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if (!gst_video_info_from_caps (&info, caps))
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goto invalid_caps;
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aasink->info = info;
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return TRUE;
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/* ERRORS */
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invalid_caps:
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{
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GST_DEBUG_OBJECT (aasink, "invalid caps");
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return FALSE;
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}
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}
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static void
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gst_aasink_init (GstAASink * aasink)
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{
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memcpy (&aasink->ascii_surf, &aa_defparams,
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sizeof (struct aa_hardware_params));
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aasink->ascii_parms.bright = 0;
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aasink->ascii_parms.contrast = 16;
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aasink->ascii_parms.gamma = 1.0;
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aasink->ascii_parms.dither = 0;
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aasink->ascii_parms.inversion = 0;
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aasink->ascii_parms.randomval = 0;
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aasink->aa_driver = 0;
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}
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static void
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gst_aasink_scale (GstAASink * aasink, guchar * src, guchar * dest,
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gint sw, gint sh, gint ss, gint dw, gint dh)
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{
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gint ypos, yinc, y;
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gint xpos, xinc, x;
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g_return_if_fail ((dw != 0) && (dh != 0));
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ypos = 0x10000;
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yinc = (sh << 16) / dh;
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xinc = (sw << 16) / dw;
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for (y = dh; y; y--) {
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while (ypos > 0x10000) {
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ypos -= 0x10000;
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src += ss;
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}
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xpos = 0x10000;
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{
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guchar *destp = dest;
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guchar *srcp = src;
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for (x = dw; x; x--) {
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while (xpos >= 0x10000L) {
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srcp++;
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xpos -= 0x10000L;
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}
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*destp++ = *srcp;
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xpos += xinc;
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}
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}
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dest += dw;
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ypos += yinc;
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}
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}
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static void
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gst_aasink_get_times (GstBaseSink * sink, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end)
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{
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*start = GST_BUFFER_TIMESTAMP (buffer);
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if (GST_BUFFER_DURATION_IS_VALID (buffer))
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*end = *start + GST_BUFFER_DURATION (buffer);
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}
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static gboolean
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gst_aasink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
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{
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GstCaps *caps;
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GstVideoInfo info;
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guint size;
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gst_query_parse_allocation (query, &caps, NULL);
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if (caps == NULL)
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goto no_caps;
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if (!gst_video_info_from_caps (&info, caps))
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goto invalid_caps;
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size = GST_VIDEO_INFO_SIZE (&info);
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/* we need at least 2 buffer because we hold on to the last one */
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gst_query_add_allocation_pool (query, NULL, size, 2, 0);
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/* we support various metadata */
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gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
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return TRUE;
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/* ERRORS */
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no_caps:
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{
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GST_DEBUG_OBJECT (bsink, "no caps specified");
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return FALSE;
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}
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invalid_caps:
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{
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GST_DEBUG_OBJECT (bsink, "invalid caps specified");
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return FALSE;
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}
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}
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static GstFlowReturn
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gst_aasink_show_frame (GstVideoSink * videosink, GstBuffer * buffer)
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{
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GstAASink *aasink;
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GstVideoFrame frame;
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aasink = GST_AASINK (videosink);
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GST_DEBUG ("show frame");
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if (!gst_video_frame_map (&frame, &aasink->info, buffer, GST_MAP_READ))
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goto invalid_frame;
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gst_aasink_scale (aasink, GST_VIDEO_FRAME_PLANE_DATA (&frame, 0), /* src */
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aa_image (aasink->context), /* dest */
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GST_VIDEO_INFO_WIDTH (&aasink->info), /* sw */
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GST_VIDEO_INFO_HEIGHT (&aasink->info), /* sh */
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GST_VIDEO_FRAME_PLANE_STRIDE (&frame, 0), /* ss */
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aa_imgwidth (aasink->context), /* dw */
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aa_imgheight (aasink->context)); /* dh */
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aa_render (aasink->context, &aasink->ascii_parms,
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0, 0, aa_imgwidth (aasink->context), aa_imgheight (aasink->context));
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aa_flush (aasink->context);
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aa_getevent (aasink->context, FALSE);
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gst_video_frame_unmap (&frame);
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return GST_FLOW_OK;
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/* ERRORS */
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invalid_frame:
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{
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GST_DEBUG_OBJECT (aasink, "invalid frame");
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return GST_FLOW_ERROR;
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}
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}
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static void
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gst_aasink_set_property (GObject * object, guint prop_id, const GValue * value,
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GParamSpec * pspec)
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{
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GstAASink *aasink;
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aasink = GST_AASINK (object);
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switch (prop_id) {
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case PROP_WIDTH:
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aasink->ascii_surf.width = g_value_get_int (value);
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break;
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case PROP_HEIGHT:
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aasink->ascii_surf.height = g_value_get_int (value);
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break;
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case PROP_DRIVER:{
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aasink->aa_driver = g_value_get_enum (value);
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break;
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}
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case PROP_DITHER:{
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aasink->ascii_parms.dither = g_value_get_enum (value);
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break;
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}
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case PROP_BRIGHTNESS:{
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aasink->ascii_parms.bright = g_value_get_int (value);
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break;
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}
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case PROP_CONTRAST:{
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aasink->ascii_parms.contrast = g_value_get_int (value);
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break;
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}
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case PROP_GAMMA:{
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aasink->ascii_parms.gamma = g_value_get_float (value);
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break;
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}
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case PROP_INVERSION:{
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aasink->ascii_parms.inversion = g_value_get_boolean (value);
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break;
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}
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case PROP_RANDOMVAL:{
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aasink->ascii_parms.randomval = g_value_get_int (value);
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break;
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}
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default:
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break;
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}
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}
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static void
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gst_aasink_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstAASink *aasink;
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aasink = GST_AASINK (object);
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switch (prop_id) {
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case PROP_WIDTH:{
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g_value_set_int (value, aasink->ascii_surf.width);
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break;
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}
|
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case PROP_HEIGHT:{
|
|
g_value_set_int (value, aasink->ascii_surf.height);
|
|
break;
|
|
}
|
|
case PROP_DRIVER:{
|
|
g_value_set_enum (value, aasink->aa_driver);
|
|
break;
|
|
}
|
|
case PROP_DITHER:{
|
|
g_value_set_enum (value, aasink->ascii_parms.dither);
|
|
break;
|
|
}
|
|
case PROP_BRIGHTNESS:{
|
|
g_value_set_int (value, aasink->ascii_parms.bright);
|
|
break;
|
|
}
|
|
case PROP_CONTRAST:{
|
|
g_value_set_int (value, aasink->ascii_parms.contrast);
|
|
break;
|
|
}
|
|
case PROP_GAMMA:{
|
|
g_value_set_float (value, aasink->ascii_parms.gamma);
|
|
break;
|
|
}
|
|
case PROP_INVERSION:{
|
|
g_value_set_boolean (value, aasink->ascii_parms.inversion);
|
|
break;
|
|
}
|
|
case PROP_RANDOMVAL:{
|
|
g_value_set_int (value, aasink->ascii_parms.randomval);
|
|
break;
|
|
}
|
|
case PROP_FRAMES_DISPLAYED:{
|
|
g_value_set_int (value, aasink->frames_displayed);
|
|
break;
|
|
}
|
|
case PROP_FRAME_TIME:{
|
|
g_value_set_int (value, aasink->frame_time / 1000000);
|
|
break;
|
|
}
|
|
default:{
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_aasink_open (GstAASink * aasink)
|
|
{
|
|
if (!aasink->context) {
|
|
aa_recommendhidisplay (aa_drivers[aasink->aa_driver]->shortname);
|
|
|
|
aasink->context = aa_autoinit (&aasink->ascii_surf);
|
|
if (aasink->context == NULL) {
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (aasink), LIBRARY, TOO_LAZY, (NULL),
|
|
("error opening aalib context"));
|
|
return FALSE;
|
|
}
|
|
aa_autoinitkbd (aasink->context, 0);
|
|
aa_resizehandler (aasink->context, (void *) aa_resize);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_aasink_close (GstAASink * aasink)
|
|
{
|
|
aa_close (aasink->context);
|
|
aasink->context = NULL;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_aasink_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret;
|
|
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
if (!gst_aasink_open (GST_AASINK (element)))
|
|
goto open_failed;
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
gst_aasink_close (GST_AASINK (element));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
|
|
open_failed:
|
|
{
|
|
return GST_STATE_CHANGE_FAILURE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
if (!gst_element_register (plugin, "aasink", GST_RANK_NONE, GST_TYPE_AASINK))
|
|
return FALSE;
|
|
|
|
if (!gst_element_register (plugin, "aatv", GST_RANK_NONE, GST_TYPE_AATV))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
aasink,
|
|
"ASCII Art video sink & filter",
|
|
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
|