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 "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 {
SIGNAL_FRAME_DISPLAYED,
SIGNAL_HAVE_SIZE,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_WIDTH,
ARG_HEIGHT,
ARG_DITHER,
ARG_FRAMES_DISPLAYED,
ARG_FRAME_TIME,
};
GST_PAD_TEMPLATE_FACTORY (sink_template,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
gst_caps_new (
"cacasink_caps",
"video/x-raw-rgb",
GST_VIDEO_RGB_PAD_TEMPLATE_PROPS_24_32
)
)
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_set_clock (GstElement *element, GstClock *clock);
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;
static guint gst_cacasink_signals[LAST_SIGNAL] = { 0 };
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,
};
cacasink_type = g_type_register_static(GST_TYPE_ELEMENT, "GstCACASink", &cacasink_info, 0);
}
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_add_pad_template (element_class,
GST_PAD_TEMPLATE_GET (sink_template));
gst_element_class_set_details (element_class, &gst_cacasink_details);
}
static void
gst_cacasink_class_init (GstCACASinkClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDTH,
g_param_spec_int("width","width","width",
G_MININT,G_MAXINT,0,G_PARAM_READABLE)); /* CHECKME */
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT,
g_param_spec_int("height","height","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","dither",
GST_TYPE_CACADITHER,0,G_PARAM_READWRITE)); /* CHECKME! */
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAMES_DISPLAYED,
g_param_spec_int("frames_displayed","frames_displayed","frames_displayed",
G_MININT,G_MAXINT,0,G_PARAM_READABLE)); /* CHECKME */
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAME_TIME,
g_param_spec_int("frame_time","frame_time","frame_time",
G_MININT,G_MAXINT,0,G_PARAM_READABLE)); /* CHECKME */
gobject_class->set_property = gst_cacasink_set_property;
gobject_class->get_property = gst_cacasink_get_property;
gst_cacasink_signals[SIGNAL_FRAME_DISPLAYED] =
g_signal_new ("frame_displayed", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstCACASinkClass, frame_displayed), NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
gst_cacasink_signals[SIGNAL_HAVE_SIZE] =
g_signal_new ("have_size", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstCACASinkClass, have_size), NULL, NULL,
gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
G_TYPE_UINT, G_TYPE_UINT);
gstelement_class->change_state = gst_cacasink_change_state;
gstelement_class->set_clock = gst_cacasink_set_clock;
}
static GstPadLinkReturn
gst_cacasink_sinkconnect (GstPad *pad, GstCaps *caps)
{
GstCACASink *cacasink;
cacasink = GST_CACASINK (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_LINK_DELAYED;
gst_caps_get_int (caps, "width", &cacasink->image_width);
gst_caps_get_int (caps, "height", &cacasink->image_height);
gst_caps_get_int (caps, "bpp", &cacasink->bpp);
gst_caps_get_int (caps, "red_mask", &cacasink->red_mask);
gst_caps_get_int (caps, "green_mask", &cacasink->green_mask);
gst_caps_get_int (caps, "blue_mask", &cacasink->blue_mask);
g_signal_emit( G_OBJECT (cacasink), gst_cacasink_signals[SIGNAL_HAVE_SIZE], 0,
cacasink->image_width, cacasink->image_height);
/*if (cacasink->bitmap != NULL) {
caca_free_bitmap (cacasink->bitmap);
}
caca->bitmap = caca_create_bitmap (cacasink->bpp, cacasink->image_width, cacasink->image_height, cacasink->image_width * cacasink->bpp/8, cacasink->red_mask, cacasink->green_mask, cacasink->blue_mask);*/
return GST_PAD_LINK_OK;
}
static void
gst_cacasink_set_clock (GstElement *element, GstClock *clock)
{
GstCACASink *cacasink = GST_CACASINK (element);
cacasink->clock = clock;
}
static void
gst_cacasink_init (GstCACASink *cacasink)
{
cacasink->sinkpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (sink_template), "sink");
gst_element_add_pad (GST_ELEMENT (cacasink), cacasink->sinkpad);
gst_pad_set_chain_function (cacasink->sinkpad, gst_cacasink_chain);
gst_pad_set_link_function (cacasink->sinkpad, gst_cacasink_sinkconnect);
cacasink->screen_width = -1;
cacasink->screen_height = -1;
cacasink->image_width = GST_CACA_DEFAULT_IMAGE_WIDTH;
cacasink->image_height = GST_CACA_DEFAULT_IMAGE_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;
cacasink->clock = NULL;
cacasink->bitmap = NULL;
GST_FLAG_SET(cacasink, GST_ELEMENT_THREAD_SUGGESTED);
}
static void
gst_cacasink_chain (GstPad *pad, GstData *_data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstCACASink *cacasink;
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));
GST_DEBUG ("videosink: clock wait: %" G_GUINT64_FORMAT, GST_BUFFER_TIMESTAMP(buf));
if (cacasink->clock) {
GstClockID id = gst_clock_new_single_shot_id (cacasink->clock, GST_BUFFER_TIMESTAMP(buf));
gst_element_clock_wait (GST_ELEMENT (cacasink), id, NULL);
gst_clock_id_free (id);
}
caca_draw_bitmap (0, 0, cacasink->screen_width-1, cacasink->screen_height-1, cacasink->bitmap, GST_BUFFER_DATA (buf));
caca_refresh ();
g_signal_emit(G_OBJECT(cacasink),gst_cacasink_signals[SIGNAL_FRAME_DISPLAYED], 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);
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_WIDTH: {
g_value_set_int (value, cacasink->screen_width);
break;
}
case ARG_HEIGHT: {
g_value_set_int (value, cacasink->screen_height);
break;
}
case ARG_DITHER: {
g_value_set_enum (value, cacasink->dither);
break;
}
case ARG_FRAMES_DISPLAYED: {
g_value_set_int (value, cacasink->frames_displayed);
break;
}
case ARG_FRAME_TIME: {
g_value_set_int (value, cacasink->frame_time/1000000);
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);
caca_init ();
screen_width = caca_get_width ();
screen_height = caca_get_height ();
caca_set_dithering (cacasink->dither);
caca->bitmap = caca_create_bitmap (
cacasink->bpp,
cacasink->image_width,
cacasink->image_height,
cacasink->image_width * cacasink->bpp/8,
cacasink->red_mask,
cacasink->green_mask,
cacasink->blue_mask);
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));
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)
{
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,
"GPL",
GST_PACKAGE,
GST_ORIGIN
)