gstreamer/ext/libcaca/gstcacasink.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <sys/time.h>
#include <gst/navigation/navigation.h>
#include "gstcacasink.h"
/* elementfactory information */
static GstElementDetails gst_cacasink_details = {
"CACA sink",
"Sink/Video",
"A colored ASCII art videosink",
"Zeeshan Ali <zak147@yahoo.com>"
};
/* cacasink signals and args */
enum
{
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_SCREEN_WIDTH,
ARG_SCREEN_HEIGHT,
ARG_DITHER,
ARG_ANTIALIASING
};
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB ";" GST_VIDEO_CAPS_RGBx ";"
GST_VIDEO_CAPS_RGB_16 ";" GST_VIDEO_CAPS_RGB_15)
);
static void gst_cacasink_base_init (gpointer g_class);
static void gst_cacasink_class_init (GstCACASinkClass * klass);
static void gst_cacasink_init (GstCACASink * cacasink);
static void gst_cacasink_interface_init (GstImplementsInterfaceClass * klass);
static gboolean gst_cacasink_interface_supported (GstImplementsInterface *
iface, GType type);
static void gst_cacasink_navigation_init (GstNavigationInterface * iface);
static void gst_cacasink_navigation_send_event (GstNavigation * navigation,
GstStructure * structure);
static void gst_cacasink_chain (GstPad * pad, GstData * _data);
static void gst_cacasink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_cacasink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstElementStateReturn gst_cacasink_change_state (GstElement * element);
static GstElementClass *parent_class = NULL;
GType
gst_cacasink_get_type (void)
{
static GType cacasink_type = 0;
if (!cacasink_type) {
static const GTypeInfo cacasink_info = {
sizeof (GstCACASinkClass),
gst_cacasink_base_init,
NULL,
(GClassInitFunc) gst_cacasink_class_init,
NULL,
NULL,
sizeof (GstCACASink),
0,
(GInstanceInitFunc) gst_cacasink_init,
};
static const GInterfaceInfo iface_info = {
(GInterfaceInitFunc) gst_cacasink_interface_init,
NULL,
NULL,
};
static const GInterfaceInfo navigation_info = {
(GInterfaceInitFunc) gst_cacasink_navigation_init,
NULL,
NULL,
};
cacasink_type =
g_type_register_static (GST_TYPE_VIDEOSINK, "GstCACASink",
&cacasink_info, 0);
g_type_add_interface_static (cacasink_type, GST_TYPE_IMPLEMENTS_INTERFACE,
&iface_info);
g_type_add_interface_static (cacasink_type, GST_TYPE_NAVIGATION,
&navigation_info);
}
return cacasink_type;
}
#define GST_TYPE_CACADITHER (gst_cacasink_dither_get_type())
static GType
gst_cacasink_dither_get_type (void)
{
static GType dither_type = 0;
if (!dither_type) {
GEnumValue *dithers;
gint n_dithers;
gint i;
gchar *caca_dithernames[] = {
"NONE", "ORDERED2", "ORDERED4", "ORDERED8", "RANDOM", NULL
};
n_dithers = 5;
dithers = g_new0 (GEnumValue, n_dithers + 1);
for (i = 0; i < n_dithers; i++) {
dithers[i].value = i;
dithers[i].value_name = g_strdup (caca_dithernames[i]);
dithers[i].value_nick = g_strdup (caca_dithernames[i]);
}
dithers[i].value = 0;
dithers[i].value_name = NULL;
dithers[i].value_nick = NULL;
dither_type = g_enum_register_static ("GstCACASinkDithers", dithers);
}
return dither_type;
}
static void
gst_cacasink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_cacasink_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
}
static void
gst_cacasink_class_init (GstCACASinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstVideoSinkClass *gstvs_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstvs_class = (GstVideoSinkClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SCREEN_WIDTH, g_param_spec_int ("screen_width", "screen_width", "screen_width", G_MININT, G_MAXINT, 0, G_PARAM_READABLE)); /* CHECKME */
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SCREEN_HEIGHT, g_param_spec_int ("screen_height", "screen_height", "screen_height", G_MININT, G_MAXINT, 0, G_PARAM_READABLE)); /* CHECKME */
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DITHER,
g_param_spec_enum ("dither", "Dither Type", "Set type of Dither",
GST_TYPE_CACADITHER, 0, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ANTIALIASING,
g_param_spec_boolean ("anti_aliasing", "Anti-Aliasing",
"Enables Anti-Aliasing", TRUE, G_PARAM_READWRITE));
gobject_class->set_property = gst_cacasink_set_property;
gobject_class->get_property = gst_cacasink_get_property;
gstelement_class->change_state = gst_cacasink_change_state;
}
static void
gst_cacasink_interface_init (GstImplementsInterfaceClass * klass)
{
klass->supported = gst_cacasink_interface_supported;
}
static gboolean
gst_cacasink_interface_supported (GstImplementsInterface * iface, GType type)
{
g_assert (type == GST_TYPE_NAVIGATION);
return (GST_STATE (iface) != GST_STATE_NULL);
}
static void
gst_cacasink_navigation_init (GstNavigationInterface * iface)
{
iface->send_event = gst_cacasink_navigation_send_event;
}
static void
gst_cacasink_navigation_send_event (GstNavigation * navigation,
GstStructure * structure)
{
GstCACASink *cacasink = GST_CACASINK (navigation);
GstEvent *event;
event = gst_event_new (GST_EVENT_NAVIGATION);
/*GST_EVENT_TIMESTAMP (event) = 0; */
event->event_data.structure.structure = structure;
/* FIXME
* Obviously, the pointer x,y coordinates need to be adjusted by the
* window size and relation to the bounding window. */
gst_pad_send_event (gst_pad_get_peer (GST_VIDEOSINK_PAD (cacasink)), event);
}
static GstPadLinkReturn
gst_cacasink_sinkconnect (GstPad * pad, const GstCaps * caps)
{
GstCACASink *cacasink;
GstStructure *structure;
cacasink = GST_CACASINK (gst_pad_get_parent (pad));
/* We cannot use library functions if the sink is not open */
if (!GST_FLAG_IS_SET (GST_ELEMENT (cacasink), GST_CACASINK_OPEN))
return GST_PAD_LINK_DELAYED;
/*if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_LINK_DELAYED; */
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &(GST_VIDEOSINK_WIDTH (cacasink)));
gst_structure_get_int (structure, "height",
&(GST_VIDEOSINK_HEIGHT (cacasink)));
gst_structure_get_int (structure, "bpp", &cacasink->bpp);
gst_structure_get_int (structure, "red_mask", &cacasink->red_mask);
gst_structure_get_int (structure, "green_mask", &cacasink->green_mask);
gst_structure_get_int (structure, "blue_mask", &cacasink->blue_mask);
if (cacasink->bpp == 24) {
cacasink->red_mask = GUINT32_FROM_BE (cacasink->red_mask) >> 8;
cacasink->green_mask = GUINT32_FROM_BE (cacasink->green_mask) >> 8;
cacasink->blue_mask = GUINT32_FROM_BE (cacasink->blue_mask) >> 8;
}
else if (cacasink->bpp == 32) {
cacasink->red_mask = GUINT32_FROM_BE (cacasink->red_mask);
cacasink->green_mask = GUINT32_FROM_BE (cacasink->green_mask);
cacasink->blue_mask = GUINT32_FROM_BE (cacasink->blue_mask);
}
else if (cacasink->bpp == 16 || cacasink->bpp == 15) {
cacasink->red_mask = GUINT16_FROM_BE (cacasink->red_mask);
cacasink->green_mask = GUINT16_FROM_BE (cacasink->green_mask);
cacasink->blue_mask = GUINT16_FROM_BE (cacasink->blue_mask);
}
if (cacasink->bitmap) {
caca_free_bitmap (cacasink->bitmap);
}
cacasink->bitmap = caca_create_bitmap (cacasink->bpp,
GST_VIDEOSINK_WIDTH (cacasink),
GST_VIDEOSINK_HEIGHT (cacasink),
GST_VIDEOSINK_WIDTH (cacasink) * cacasink->bpp / 8,
cacasink->red_mask, cacasink->green_mask, cacasink->blue_mask, 0);
if (!cacasink->bitmap) {
return GST_PAD_LINK_DELAYED;
}
return GST_PAD_LINK_OK;
}
static void
gst_cacasink_init (GstCACASink * cacasink)
{
GST_VIDEOSINK_PAD (cacasink) =
gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
"sink");
gst_element_add_pad (GST_ELEMENT (cacasink), GST_VIDEOSINK_PAD (cacasink));
gst_pad_set_chain_function (GST_VIDEOSINK_PAD (cacasink), gst_cacasink_chain);
gst_pad_set_link_function (GST_VIDEOSINK_PAD (cacasink),
gst_cacasink_sinkconnect);
cacasink->screen_width = GST_CACA_DEFAULT_SCREEN_WIDTH;
cacasink->screen_height = GST_CACA_DEFAULT_SCREEN_HEIGHT;
cacasink->bpp = GST_CACA_DEFAULT_BPP;
cacasink->red_mask = GST_CACA_DEFAULT_RED_MASK;
cacasink->green_mask = GST_CACA_DEFAULT_GREEN_MASK;
cacasink->blue_mask = GST_CACA_DEFAULT_BLUE_MASK;
GST_FLAG_SET (cacasink, GST_ELEMENT_THREAD_SUGGESTED);
}
static void
gst_cacasink_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstCACASink *cacasink;
GstClockTime time = GST_BUFFER_TIMESTAMP (buf);
gint64 jitter;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
cacasink = GST_CACASINK (gst_pad_get_parent (pad));
/* We cannot use library functions if the sink is not open */
if (!GST_FLAG_IS_SET (GST_ELEMENT (cacasink), GST_CACASINK_OPEN))
return;
if (cacasink->id && GST_CLOCK_TIME_IS_VALID (time)) {
GST_DEBUG ("videosink: clock %s wait: %" G_GUINT64_FORMAT " %u",
GST_OBJECT_NAME (GST_VIDEOSINK_CLOCK (cacasink)),
time, GST_BUFFER_SIZE (buf));
gst_element_wait (GST_ELEMENT (cacasink), GST_BUFFER_TIMESTAMP (buf));
}
caca_clear ();
caca_draw_bitmap (0, 0, cacasink->screen_width - 1,
cacasink->screen_height - 1, cacasink->bitmap, GST_BUFFER_DATA (buf));
caca_refresh ();
if (GST_VIDEOSINK_CLOCK (cacasink)) {
jitter = gst_clock_get_time (GST_VIDEOSINK_CLOCK (cacasink)) - time;
cacasink->correction = (cacasink->correction + jitter) >> 1;
cacasink->correction = 0;
}
gst_buffer_unref (buf);
}
static void
gst_cacasink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstCACASink *cacasink;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_CACASINK (object));
cacasink = GST_CACASINK (object);
switch (prop_id) {
case ARG_DITHER:{
cacasink->dither = g_value_get_enum (value);
caca_set_dithering (cacasink->dither + CACA_DITHERING_NONE);
break;
}
case ARG_ANTIALIASING:{
cacasink->antialiasing = g_value_get_boolean (value);
if (cacasink->antialiasing) {
caca_set_feature (CACA_ANTIALIASING_MAX);
}
else {
caca_set_feature (CACA_ANTIALIASING_MIN);
}
break;
}
default:
break;
}
}
static void
gst_cacasink_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstCACASink *cacasink;
/* it's not null if we got it, but it might not be ours */
cacasink = GST_CACASINK (object);
switch (prop_id) {
case ARG_SCREEN_WIDTH:{
g_value_set_int (value, cacasink->screen_width);
break;
}
case ARG_SCREEN_HEIGHT:{
g_value_set_int (value, cacasink->screen_height);
break;
}
case ARG_DITHER:{
g_value_set_enum (value, cacasink->dither);
break;
}
case ARG_ANTIALIASING:{
g_value_set_boolean (value, cacasink->antialiasing);
break;
}
default:{
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
}
static gboolean
gst_cacasink_open (GstCACASink * cacasink)
{
g_return_val_if_fail (!GST_FLAG_IS_SET (cacasink, GST_CACASINK_OPEN), FALSE);
cacasink->bitmap = NULL;
caca_init ();
cacasink->screen_width = caca_get_width ();
cacasink->screen_height = caca_get_height ();
cacasink->antialiasing = TRUE;
caca_set_feature (CACA_ANTIALIASING_MAX);
cacasink->dither = 0;
caca_set_dithering (CACA_DITHERING_NONE);
GST_FLAG_SET (cacasink, GST_CACASINK_OPEN);
return TRUE;
}
static void
gst_cacasink_close (GstCACASink * cacasink)
{
g_return_if_fail (GST_FLAG_IS_SET (cacasink, GST_CACASINK_OPEN));
if (cacasink->bitmap) {
caca_free_bitmap (cacasink->bitmap);
cacasink->bitmap = NULL;
}
caca_end ();
GST_FLAG_UNSET (cacasink, GST_CACASINK_OPEN);
}
static GstElementStateReturn
gst_cacasink_change_state (GstElement * element)
{
g_return_val_if_fail (GST_IS_CACASINK (element), GST_STATE_FAILURE);
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_FLAG_IS_SET (element, GST_CACASINK_OPEN))
gst_cacasink_close (GST_CACASINK (element));
} else {
if (!GST_FLAG_IS_SET (element, GST_CACASINK_OPEN)) {
if (!gst_cacasink_open (GST_CACASINK (element)))
return GST_STATE_FAILURE;
}
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
/* Loading the library containing GstVideoSink, our parent object */
if (!gst_library_load ("gstvideo"))
return FALSE;
if (!gst_element_register (plugin, "cacasink", GST_RANK_NONE,
GST_TYPE_CACASINK))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"cacasink",
"Colored ASCII Art video sink",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)