gstreamer/gst/librfb/gstrfbsrc.c
2012-04-05 18:02:56 +02:00

551 lines
17 KiB
C

/* GStreamer
* Copyright (C) <2007> Thijs Vermeir <thijsvermeir@gmail.com>
* Copyright (C) <2006> Andre Moreira Magalhaes <andre.magalhaes@indt.org.br>
* Copyright (C) <2004> David A. Schleef <ds@schleef.org>
* 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 "gstrfbsrc.h"
#include <gst/video/video.h>
#include <string.h>
#include <stdlib.h>
#ifdef HAVE_X11
#include <X11/Xlib.h>
#endif
enum
{
ARG_0,
ARG_HOST,
ARG_PORT,
ARG_VERSION,
ARG_PASSWORD,
ARG_OFFSET_X,
ARG_OFFSET_Y,
ARG_WIDTH,
ARG_HEIGHT,
ARG_INCREMENTAL,
ARG_USE_COPYRECT,
ARG_SHARED,
ARG_VIEWONLY
};
GST_DEBUG_CATEGORY_STATIC (rfbsrc_debug);
GST_DEBUG_CATEGORY (rfbdecoder_debug);
#define GST_CAT_DEFAULT rfbsrc_debug
static GstStaticPadTemplate gst_rfb_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw-rgb, "
"bpp = (int) [1, 255], "
"depth = (int) [1, 255], "
"endianness = (int) [1234, 4321], "
"red_mask = (int) [min, max], "
"green_mask = (int) [min, max], "
"blue_mask = (int) [min, max], "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], " "framerate = (fraction) 0/1")
);
static void gst_rfb_src_dispose (GObject * object);
static void gst_rfb_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rfb_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_rfb_src_start (GstBaseSrc * bsrc);
static gboolean gst_rfb_src_stop (GstBaseSrc * bsrc);
static gboolean gst_rfb_src_event (GstBaseSrc * bsrc, GstEvent * event);
static GstFlowReturn gst_rfb_src_create (GstPushSrc * psrc,
GstBuffer ** outbuf);
GST_BOILERPLATE (GstRfbSrc, gst_rfb_src, GstPushSrc, GST_TYPE_PUSH_SRC);
static void
gst_rfb_src_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rfb_src_template));
gst_element_class_set_details_simple (element_class, "Rfb source",
"Source/Video",
"Creates a rfb video stream",
"David A. Schleef <ds@schleef.org>, "
"Andre Moreira Magalhaes <andre.magalhaes@indt.org.br>, "
"Thijs Vermeir <thijsvermeir@gmail.com>");
}
static void
gst_rfb_src_class_init (GstRfbSrcClass * klass)
{
GObjectClass *gobject_class;
GstBaseSrcClass *gstbasesrc_class;
GstPushSrcClass *gstpushsrc_class;
GST_DEBUG_CATEGORY_INIT (rfbsrc_debug, "rfbsrc", 0, "rfb src element");
GST_DEBUG_CATEGORY_INIT (rfbdecoder_debug, "rfbdecoder", 0, "rfb decoder");
gobject_class = (GObjectClass *) klass;
gstbasesrc_class = (GstBaseSrcClass *) klass;
gstpushsrc_class = (GstPushSrcClass *) klass;
gobject_class->dispose = gst_rfb_src_dispose;
gobject_class->set_property = gst_rfb_src_set_property;
gobject_class->get_property = gst_rfb_src_get_property;
g_object_class_install_property (gobject_class, ARG_HOST,
g_param_spec_string ("host", "Host to connect to", "Host to connect to",
"127.0.0.1", G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_PORT,
g_param_spec_int ("port", "Port", "Port",
1, 65535, 5900, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_VERSION,
g_param_spec_string ("version", "RFB protocol version",
"RFB protocol version", "3.3",
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_PASSWORD,
g_param_spec_string ("password", "Password for authentication",
"Password for authentication", "",
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_OFFSET_X,
g_param_spec_int ("offset-x", "x offset for screen scrapping",
"x offset for screen scrapping", 0, 65535, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_OFFSET_Y,
g_param_spec_int ("offset-y", "y offset for screen scrapping",
"y offset for screen scrapping", 0, 65535, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_WIDTH,
g_param_spec_int ("width", "width of screen", "width of screen", 0, 65535,
0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_HEIGHT,
g_param_spec_int ("height", "height of screen", "height of screen", 0,
65535, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_INCREMENTAL,
g_param_spec_boolean ("incremental", "Incremental updates",
"Incremental updates", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_USE_COPYRECT,
g_param_spec_boolean ("use-copyrect", "Use copyrect encoding",
"Use copyrect encoding", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_SHARED,
g_param_spec_boolean ("shared", "Share desktop with other clients",
"Share desktop with other clients", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, ARG_VIEWONLY,
g_param_spec_boolean ("view-only", "Only view the desktop",
"only view the desktop", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_rfb_src_start);
gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_rfb_src_stop);
gstbasesrc_class->event = GST_DEBUG_FUNCPTR (gst_rfb_src_event);
gstpushsrc_class->create = GST_DEBUG_FUNCPTR (gst_rfb_src_create);
}
static void
gst_rfb_src_init (GstRfbSrc * src, GstRfbSrcClass * klass)
{
GstBaseSrc *bsrc = GST_BASE_SRC (src);
gst_pad_use_fixed_caps (GST_BASE_SRC_PAD (bsrc));
gst_base_src_set_live (bsrc, TRUE);
gst_base_src_set_format (bsrc, GST_FORMAT_TIME);
src->host = g_strdup ("127.0.0.1");
src->port = 5900;
src->version_major = 3;
src->version_minor = 3;
src->incremental_update = TRUE;
src->view_only = FALSE;
src->decoder = rfb_decoder_new ();
}
static void
gst_rfb_src_dispose (GObject * object)
{
GstRfbSrc *src = GST_RFB_SRC (object);
g_free (src->host);
if (src->decoder) {
rfb_decoder_free (src->decoder);
g_free (src->decoder);
src->decoder = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_rfb_property_set_version (GstRfbSrc * src, gchar * value)
{
gchar *major;
gchar *minor;
g_return_if_fail (src != NULL);
g_return_if_fail (value != NULL);
major = g_strdup (value);
minor = g_strrstr (value, ".");
g_return_if_fail (minor != NULL);
*minor++ = 0;
g_return_if_fail (g_ascii_isdigit (*major) == TRUE);
g_return_if_fail (g_ascii_isdigit (*minor) == TRUE);
src->version_major = g_ascii_digit_value (*major);
src->version_minor = g_ascii_digit_value (*minor);
GST_DEBUG ("Version major : %d", src->version_major);
GST_DEBUG ("Version minor : %d", src->version_minor);
g_free (major);
g_free (value);
}
static gchar *
gst_rfb_property_get_version (GstRfbSrc * src)
{
return g_strdup_printf ("%d.%d", src->version_major, src->version_minor);
}
static void
gst_rfb_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRfbSrc *src = GST_RFB_SRC (object);
switch (prop_id) {
case ARG_HOST:
src->host = g_strdup (g_value_get_string (value));
break;
case ARG_PORT:
src->port = g_value_get_int (value);
break;
case ARG_VERSION:
gst_rfb_property_set_version (src, g_strdup (g_value_get_string (value)));
break;
case ARG_PASSWORD:
g_free (src->decoder->password);
src->decoder->password = g_strdup (g_value_get_string (value));
break;
case ARG_OFFSET_X:
src->decoder->offset_x = g_value_get_int (value);
break;
case ARG_OFFSET_Y:
src->decoder->offset_y = g_value_get_int (value);
break;
case ARG_WIDTH:
src->decoder->rect_width = g_value_get_int (value);
break;
case ARG_HEIGHT:
src->decoder->rect_height = g_value_get_int (value);
break;
case ARG_INCREMENTAL:
src->incremental_update = g_value_get_boolean (value);
break;
case ARG_USE_COPYRECT:
src->decoder->use_copyrect = g_value_get_boolean (value);
break;
case ARG_SHARED:
src->decoder->shared_flag = g_value_get_boolean (value);
break;
case ARG_VIEWONLY:
src->view_only = g_value_get_boolean (value);
break;
default:
break;
}
}
static void
gst_rfb_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRfbSrc *src = GST_RFB_SRC (object);
gchar *version;
switch (prop_id) {
case ARG_HOST:
g_value_set_string (value, src->host);
break;
case ARG_PORT:
g_value_set_int (value, src->port);
break;
case ARG_VERSION:
version = gst_rfb_property_get_version (src);
g_value_set_string (value, version);
g_free (version);
break;
case ARG_OFFSET_X:
g_value_set_int (value, src->decoder->offset_x);
break;
case ARG_OFFSET_Y:
g_value_set_int (value, src->decoder->offset_y);
break;
case ARG_WIDTH:
g_value_set_int (value, src->decoder->rect_width);
break;
case ARG_HEIGHT:
g_value_set_int (value, src->decoder->rect_height);
break;
case ARG_INCREMENTAL:
g_value_set_boolean (value, src->incremental_update);
break;
case ARG_USE_COPYRECT:
g_value_set_boolean (value, src->decoder->use_copyrect);
break;
case ARG_SHARED:
g_value_set_boolean (value, src->decoder->shared_flag);
break;
case ARG_VIEWONLY:
g_value_set_boolean (value, src->view_only);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_rfb_src_start (GstBaseSrc * bsrc)
{
GstRfbSrc *src = GST_RFB_SRC (bsrc);
RfbDecoder *decoder;
GstCaps *caps;
guint32 red_mask, green_mask, blue_mask;
decoder = src->decoder;
GST_DEBUG_OBJECT (src, "connecting to host %s on port %d",
src->host, src->port);
if (!rfb_decoder_connect_tcp (decoder, src->host, src->port)) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not connect to host %s on port %d", src->host, src->port));
rfb_decoder_free (decoder);
return FALSE;
}
while (!decoder->inited) {
rfb_decoder_iterate (decoder);
}
decoder->rect_width =
(decoder->rect_width ? decoder->rect_width : decoder->width);
decoder->rect_height =
(decoder->rect_height ? decoder->rect_height : decoder->height);
g_object_set (bsrc, "blocksize",
src->decoder->width * src->decoder->height * (decoder->bpp / 8), NULL);
decoder->frame = g_malloc (bsrc->blocksize);
if (decoder->use_copyrect) {
decoder->prev_frame = g_malloc (bsrc->blocksize);
}
decoder->decoder_private = src;
/* calculate some many used values */
decoder->bytespp = decoder->bpp / 8;
decoder->line_size = decoder->rect_width * decoder->bytespp;
GST_DEBUG_OBJECT (src, "setting caps width to %d and height to %d",
decoder->rect_width, decoder->rect_height);
caps =
gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD (bsrc)));
red_mask = decoder->red_max << decoder->red_shift;
green_mask = decoder->green_max << decoder->green_shift;
blue_mask = decoder->blue_max << decoder->blue_shift;
gst_caps_set_simple (caps, "width", G_TYPE_INT, decoder->rect_width,
"height", G_TYPE_INT, decoder->rect_height,
"bpp", G_TYPE_INT, decoder->bpp,
"depth", G_TYPE_INT, decoder->depth,
"endianness", G_TYPE_INT, G_BIG_ENDIAN,
"red_mask", G_TYPE_INT, GST_READ_UINT32_BE (&red_mask),
"green_mask", G_TYPE_INT, GST_READ_UINT32_BE (&green_mask),
"blue_mask", G_TYPE_INT, GST_READ_UINT32_BE (&blue_mask), NULL);
gst_pad_set_caps (GST_BASE_SRC_PAD (bsrc), caps);
gst_caps_unref (caps);
return TRUE;
}
static gboolean
gst_rfb_src_stop (GstBaseSrc * bsrc)
{
GstRfbSrc *src = GST_RFB_SRC (bsrc);
src->decoder->fd = -1;
if (src->decoder->frame) {
g_free (src->decoder->frame);
src->decoder->frame = NULL;
}
if (src->decoder->prev_frame) {
g_free (src->decoder->prev_frame);
src->decoder->prev_frame = NULL;
}
return TRUE;
}
static GstFlowReturn
gst_rfb_src_create (GstPushSrc * psrc, GstBuffer ** outbuf)
{
GstRfbSrc *src = GST_RFB_SRC (psrc);
RfbDecoder *decoder = src->decoder;
gulong newsize;
GstFlowReturn ret;
rfb_decoder_send_update_request (decoder, src->incremental_update,
decoder->offset_x, decoder->offset_y, decoder->rect_width,
decoder->rect_height);
while (decoder->state != NULL) {
rfb_decoder_iterate (decoder);
}
newsize = GST_BASE_SRC (psrc)->blocksize;
/* Create the buffer. */
ret = gst_pad_alloc_buffer (GST_BASE_SRC_PAD (GST_BASE_SRC (psrc)),
GST_BUFFER_OFFSET_NONE, newsize,
GST_PAD_CAPS (GST_BASE_SRC_PAD (GST_BASE_SRC (psrc))), outbuf);
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
return GST_FLOW_ERROR;
}
memcpy (GST_BUFFER_DATA (*outbuf), decoder->frame, newsize);
GST_BUFFER_SIZE (*outbuf) = newsize;
GST_BUFFER_TIMESTAMP (*outbuf) =
gst_clock_get_time (GST_ELEMENT_CLOCK (src)) -
GST_ELEMENT_CAST (src)->base_time;
return GST_FLOW_OK;
}
static gboolean
gst_rfb_src_event (GstBaseSrc * bsrc, GstEvent * event)
{
GstRfbSrc *src = GST_RFB_SRC (bsrc);
gdouble x, y;
gint button;
GstStructure *structure;
const gchar *event_type;
gboolean key_event, key_press;
key_event = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NAVIGATION:
/* if in view_only mode ignore the navigation event */
if (src->view_only)
break;
structure = event->structure;
event_type = gst_structure_get_string (structure, "event");
if (strcmp (event_type, "key-press") == 0) {
key_event = key_press = TRUE;
} else if (strcmp (event_type, "key-release") == 0) {
key_event = TRUE;
key_press = FALSE;
}
if (key_event) {
#ifdef HAVE_X11
const gchar *key;
KeySym key_sym;
key = gst_structure_get_string (structure, "key");
key_sym = XStringToKeysym (key);
if (key_sym != NoSymbol)
rfb_decoder_send_key_event (src->decoder, key_sym, key_press);
#endif
break;
}
gst_structure_get_double (structure, "pointer_x", &x);
gst_structure_get_double (structure, "pointer_y", &y);
gst_structure_get_int (structure, "button", &button);
/* we need to take care of the offset's */
x += src->decoder->offset_x;
y += src->decoder->offset_y;
if (strcmp (event_type, "mouse-move") == 0) {
GST_LOG_OBJECT (src, "sending mouse-move event "
"button_mask=%d, x=%d, y=%d", src->button_mask, (gint) x, (gint) y);
rfb_decoder_send_pointer_event (src->decoder, src->button_mask,
(gint) x, (gint) y);
} else if (strcmp (event_type, "mouse-button-release") == 0) {
src->button_mask &= ~(1 << (button - 1));
GST_LOG_OBJECT (src, "sending mouse-button-release event "
"button_mask=%d, x=%d, y=%d", src->button_mask, (gint) x, (gint) y);
rfb_decoder_send_pointer_event (src->decoder, src->button_mask,
(gint) x, (gint) y);
} else if (strcmp (event_type, "mouse-button-press") == 0) {
src->button_mask |= (1 << (button - 1));
GST_LOG_OBJECT (src, "sending mouse-button-press event "
"button_mask=%d, x=%d, y=%d", src->button_mask, (gint) x, (gint) y);
rfb_decoder_send_pointer_event (src->decoder, src->button_mask,
(gint) x, (gint) y);
}
break;
default:
break;
}
return TRUE;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rfbsrc", GST_RANK_NONE,
GST_TYPE_RFB_SRC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
rfbsrc,
"Connects to a VNC server and decodes RFB stream",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)