diff options
Diffstat (limited to 'sys/ximagesrc/ximagesrc.c')
| -rw-r--r-- | sys/ximagesrc/ximagesrc.c | 743 |
1 files changed, 743 insertions, 0 deletions
diff --git a/sys/ximagesrc/ximagesrc.c b/sys/ximagesrc/ximagesrc.c new file mode 100644 index 00000000..433ff6d0 --- /dev/null +++ b/sys/ximagesrc/ximagesrc.c @@ -0,0 +1,743 @@ +/* GStreamer + * + * 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 "ximagesrc.h" + +#include <string.h> +#include <stdlib.h> + +#include <X11/Xlib.h> +#include <X11/Xutil.h> + +GST_DEBUG_CATEGORY_STATIC (gst_debug_ximagesrc); +#define GST_CAT_DEFAULT gst_debug_ximagesrc + +/* elementfactory information */ +static GstElementDetails ximagesrc_details = +GST_ELEMENT_DETAILS ("Ximage video source", + "Source/Video", + "Creates a screenshot video stream", + "Lutz Mueller <lutz@users.sourceforge.net>" + "Jan Schmidt <thaytan@mad.scientist.com>"); + +static GstStaticPadTemplate t = +GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, + GST_STATIC_CAPS ("video/x-raw-rgb, " + "framerate = (fraction) [ 0, MAX ], " + "width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")); + +enum +{ + PROP_0, + PROP_DISPLAY_NAME, + PROP_SCREEN_NUM +}; + +GST_BOILERPLATE (GstXImageSrc, gst_ximagesrc, GstPushSrc, GST_TYPE_PUSH_SRC); + +static void gst_ximagesrc_fixate (GstPad * pad, GstCaps * caps); +static void gst_ximagesrc_clear_bufpool (GstXImageSrc * ximagesrc); + +/* Called when a buffer is returned from the pipeline */ +static void +gst_ximagesrc_return_buf (GstXImageSrc * ximagesrc, GstXImageSrcBuffer * ximage) +{ + /* If our geometry changed we can't reuse that image. */ + if ((ximage->width != ximagesrc->width) || + (ximage->height != ximagesrc->height)) { + GST_DEBUG_OBJECT (ximagesrc, + "destroy image %p as its size changed %dx%d vs current %dx%d", + ximage, ximage->width, ximage->height, + ximagesrc->width, ximagesrc->height); + g_mutex_lock (ximagesrc->x_lock); + gst_ximageutil_ximage_destroy (ximagesrc->xcontext, ximage); + g_mutex_unlock (ximagesrc->x_lock); + } else { + /* In that case we can reuse the image and add it to our image pool. */ + GST_LOG_OBJECT (ximagesrc, "recycling image %p in pool", ximage); + /* need to increment the refcount again to recycle */ + gst_buffer_ref (GST_BUFFER (ximage)); + g_mutex_lock (ximagesrc->pool_lock); + ximagesrc->buffer_pool = g_slist_prepend (ximagesrc->buffer_pool, ximage); + g_mutex_unlock (ximagesrc->pool_lock); + } +} + +static gboolean +gst_ximagesrc_open_display (GstXImageSrc * s, const gchar * name) +{ + g_return_val_if_fail (GST_IS_XIMAGESRC (s), FALSE); + + if (s->xcontext != NULL) + return TRUE; + + g_mutex_lock (s->x_lock); + s->xcontext = ximageutil_xcontext_get (GST_ELEMENT (s), name); + s->width = s->xcontext->width; + s->height = s->xcontext->height; + + /* Always capture root window, for now */ + s->xwindow = s->xcontext->root; + +#ifdef HAVE_XFIXES + /* check if xfixes supported */ + { + int error_base; + + if (XFixesQueryExtension (s->xcontext->disp, &s->fixes_event_base, + &error_base)) { + s->have_xfixes = TRUE; + GST_DEBUG_OBJECT (s, "X Server supports XFixes"); + } else { + GST_DEBUG_OBJECT (s, "X Server does not support XFixes"); + } + } + +#ifdef HAVE_XDAMAGE + /* check if xdamage is supported */ + { + int error_base; + long evmask = NoEventMask; + + if (XDamageQueryExtension (s->xcontext->disp, &s->damage_event_base, + &error_base)) { + s->damage = + XDamageCreate (s->xcontext->disp, s->xwindow, + XDamageReportRawRectangles); + if (s->damage != None) { + s->damage_region = XFixesCreateRegion (s->xcontext->disp, NULL, 0); + if (s->damage_region != None) { + XGCValues values; + + GST_DEBUG_OBJECT (s, "Using XDamage extension"); + values.subwindow_mode = IncludeInferiors; + s->damage_copy_gc = XCreateGC (s->xcontext->disp, + s->xwindow, GCSubwindowMode, &values); + XSelectInput (s->xcontext->disp, s->xwindow, evmask); + + s->have_xdamage = TRUE; + } else { + XDamageDestroy (s->xcontext->disp, s->damage); + s->damage = None; + } + } else + GST_DEBUG_OBJECT (s, "Could not attach to XDamage"); + } else { + GST_DEBUG_OBJECT (s, "X Server does not have XDamage extension"); + } + } +#endif +#endif + + g_mutex_unlock (s->x_lock); + + if (s->xcontext == NULL) + return FALSE; + + return TRUE; +} + +static gboolean +gst_ximagesrc_start (GstBaseSrc * basesrc) +{ + GstXImageSrc *s = GST_XIMAGESRC (basesrc); + + s->last_frame_no = -1; + + return gst_ximagesrc_open_display (s, NULL); +} + +static gboolean +gst_ximagesrc_stop (GstBaseSrc * basesrc) +{ + GstXImageSrc *src = GST_XIMAGESRC (basesrc); + + gst_ximagesrc_clear_bufpool (src); + + if (src->xcontext) { + g_mutex_lock (src->x_lock); + ximageutil_xcontext_clear (src->xcontext); + src->xcontext = NULL; + g_mutex_unlock (src->x_lock); + } + + return TRUE; +} + +static gboolean +gst_ximagesrc_unlock (GstBaseSrc * basesrc) +{ + GstXImageSrc *src = GST_XIMAGESRC (basesrc); + + /* Awaken the create() func if it's waiting on the clock */ + GST_OBJECT_LOCK (src); + if (src->clock_id) { + GST_DEBUG_OBJECT (src, "Waking up waiting clock"); + gst_clock_id_unschedule (src->clock_id); + } + GST_OBJECT_UNLOCK (src); + + return TRUE; +} + +static gboolean +gst_ximagesrc_recalc (GstXImageSrc * src) +{ + if (!src->xcontext) + return FALSE; + + /* FIXME: Check the display hasn't changed size or something */ + /* We could use XQueryPointer to get only the current window. */ + return TRUE; +} + +/* ifdeff'ed to prevent warnings of not being used when xfixes not there */ +#ifdef HAVE_XFIXES +static void +composite_pixel (GstXContext * xcontext, guchar * dest, guchar * src) +{ + guint8 r = src[2]; + guint8 g = src[1]; + guint8 b = src[0]; + guint8 a = src[3]; + gint dr, dg, db; + guint32 color; + gint r_shift, r_max; + gint g_shift, g_max; + gint b_shift, b_max; + + switch (xcontext->bpp) { + case 8: + color = *dest; + break; + case 16: + color = GUINT16_FROM_LE (*(guint32 *) (dest)); + break; + case 32: + color = GUINT32_FROM_LE (*(guint32 *) (dest)); + break; + default: + g_warning ("bpp %d not supported\n", xcontext->bpp); + color = 0; + } + + /* FIXME: move the code that finds shift and max in the _link function */ + for (r_shift = 0; !(xcontext->visual->red_mask & (1 << r_shift)); r_shift++); + for (g_shift = 0; !(xcontext->visual->green_mask & (1 << g_shift)); + g_shift++); + for (b_shift = 0; !(xcontext->visual->blue_mask & (1 << b_shift)); b_shift++); + + r_max = (xcontext->visual->red_mask >> r_shift); + b_max = (xcontext->visual->blue_mask >> b_shift); + g_max = (xcontext->visual->green_mask >> g_shift); + +#define RGBXXX_R(x) (((x)>>r_shift) & (r_max)) +#define RGBXXX_G(x) (((x)>>g_shift) & (g_max)) +#define RGBXXX_B(x) (((x)>>b_shift) & (b_max)) + + dr = (RGBXXX_R (color) * 255) / r_max; + dg = (RGBXXX_G (color) * 255) / g_max; + db = (RGBXXX_B (color) * 255) / b_max; + + dr = (r * a + (0xff - a) * dr) / 0xff; + dg = (g * a + (0xff - a) * dg) / 0xff; + db = (b * a + (0xff - a) * db) / 0xff; + + color = (((dr * r_max) / 255) << r_shift) + + (((dg * g_max) / 255) << g_shift) + (((db * b_max) / 255) << b_shift); + + switch (xcontext->bpp) { + case 8: + *dest = color; + break; + case 16: + *(guint16 *) (dest) = color; + break; + case 32: + *(guint32 *) (dest) = color; + break; + default: + g_warning ("bpp %d not supported\n", xcontext->bpp); + } +} +#endif + +/* Retrieve an XImageSrcBuffer, preferably from our + * pool of existing images and populate it from the window */ +static GstXImageSrcBuffer * +gst_ximagesrc_ximage_get (GstXImageSrc * ximagesrc) +{ + GstXImageSrcBuffer *ximage = NULL; + + g_mutex_lock (ximagesrc->pool_lock); + while (ximagesrc->buffer_pool != NULL) { + ximage = ximagesrc->buffer_pool->data; + + if ((ximage->width != ximagesrc->width) || + (ximage->height != ximagesrc->height)) { + gst_ximage_buffer_free (ximage); + } + + ximagesrc->buffer_pool = g_slist_delete_link (ximagesrc->buffer_pool, + ximagesrc->buffer_pool); + } + g_mutex_unlock (ximagesrc->pool_lock); + + if (ximage == NULL) { + GstXContext *xcontext; + + GST_DEBUG_OBJECT (ximagesrc, "creating image (%dx%d)", + ximagesrc->width, ximagesrc->height); + + g_mutex_lock (ximagesrc->x_lock); + ximage = gst_ximageutil_ximage_new (ximagesrc->xcontext, + GST_ELEMENT (ximagesrc), ximagesrc->width, ximagesrc->height, + (BufferReturnFunc) (gst_ximagesrc_return_buf)); + if (ximage == NULL) { + GST_ELEMENT_ERROR (ximagesrc, RESOURCE, WRITE, (NULL), + ("could not create a %dx%d ximage", ximage->width, ximage->height)); + g_mutex_unlock (ximagesrc->x_lock); + return NULL; + } + + xcontext = ximagesrc->xcontext; + + /* FIXME: Include the PAR */ + gst_buffer_set_caps (GST_BUFFER (ximage), + gst_caps_new_simple ("video/x-raw-rgb", + "bpp", G_TYPE_INT, xcontext->bpp, + "depth", G_TYPE_INT, xcontext->depth, + "endianness", G_TYPE_INT, xcontext->endianness, + "red_mask", G_TYPE_INT, xcontext->visual->red_mask, + "green_mask", G_TYPE_INT, xcontext->visual->green_mask, + "blue_mask", G_TYPE_INT, xcontext->visual->blue_mask, + "width", G_TYPE_INT, xcontext->width, + "height", G_TYPE_INT, xcontext->height, + "framerate", GST_TYPE_FRACTION, ximagesrc->fps_n, ximagesrc->fps_d, + NULL)); + g_mutex_unlock (ximagesrc->x_lock); + } + + g_return_val_if_fail (GST_IS_XIMAGESRC (ximagesrc), NULL); + +#ifdef HAVE_XDAMAGE + if (ximagesrc->have_xdamage) { + XEvent ev; + + GST_DEBUG_OBJECT (ximagesrc, "Retrieving screen using XDamage"); + + do { + XNextEvent (ximagesrc->xcontext->disp, &ev); + if (ev.type == ximagesrc->damage_event_base + XDamageNotify) { + XDamageNotifyEvent *dev = (XDamageNotifyEvent *) & ev; + +#ifdef HAVE_XSHM + if (ximagesrc->xcontext->use_xshm && + dev->area.width == ximagesrc->width && + dev->area.height == ximagesrc->height) { + GST_DEBUG_OBJECT (ximagesrc, "Entire screen was damaged"); + XShmGetImage (ximagesrc->xcontext->disp, ximagesrc->xwindow, + ximage->ximage, 0, 0, AllPlanes); + /* No need to collect more events */ + while (XPending (ximagesrc->xcontext->disp)) { + XNextEvent (ximagesrc->xcontext->disp, &ev); + } + break; + } else +#endif + { + GST_LOG_OBJECT (ximagesrc, + "Retrieving damaged sub-region @ %d,%d size %dx%d", + dev->area.x, dev->area.y, dev->area.width, dev->area.height); + + XGetSubImage (ximagesrc->xcontext->disp, ximagesrc->xwindow, + dev->area.x, dev->area.y, + dev->area.width, dev->area.height, + AllPlanes, ZPixmap, ximage->ximage, dev->area.x, dev->area.y); + } + } + } while (XPending (ximagesrc->xcontext->disp)); + XDamageSubtract (ximagesrc->xcontext->disp, ximagesrc->damage, None, None); + } else { +#endif + +#ifdef HAVE_XSHM + if (ximagesrc->xcontext->use_xshm) { + GST_DEBUG_OBJECT (ximagesrc, "Retrieving screen using XShm"); + XShmGetImage (ximagesrc->xcontext->disp, ximagesrc->xwindow, + ximage->ximage, 0, 0, AllPlanes); + + } else +#endif /* HAVE_XSHM */ + { + GST_DEBUG_OBJECT (ximagesrc, "Retrieving screen using XGetImage"); + ximage->ximage = XGetImage (ximagesrc->xcontext->disp, ximagesrc->xwindow, + 0, 0, ximagesrc->width, ximagesrc->height, AllPlanes, ZPixmap); + } +#ifdef HAVE_XDAMAGE + } +#endif + +#ifdef HAVE_XFIXES + if (ximagesrc->show_pointer && ximagesrc->have_xfixes) { + XFixesCursorImage *cursor_image; + + GST_DEBUG_OBJECT (ximagesrc, "Using XFixes to draw cursor"); + /* get cursor */ + cursor_image = XFixesGetCursorImage (ximagesrc->xcontext->disp); + if (cursor_image != NULL) { + int cx, cy, i, j, count; + + cx = cursor_image->x - cursor_image->xhot; + cy = cursor_image->y - cursor_image->yhot; + //count = image->width * image->height; + count = cursor_image->width * cursor_image->height; + for (i = 0; i < count; i++) + cursor_image->pixels[i] = GUINT_TO_LE (cursor_image->pixels[i]); + + /* copy those pixels across */ + for (j = cy; j < cy + cursor_image->height && j < ximagesrc->height; j++) { + for (i = cx; i < cx + cursor_image->width && i < ximagesrc->width; i++) { + guint8 *src, *dest; + + src = + (guint8 *) & (cursor_image->pixels[((j - + cy) * cursor_image->width + (i - cx))]); + dest = + (guint8 *) & (ximage->ximage->data[(j * ximagesrc->width + + i) * (ximagesrc->xcontext->bpp / 8)]); + + composite_pixel (ximagesrc->xcontext, (guint8 *) dest, + (guint8 *) src); + } + } + } + } +#endif + + return ximage; +} + +static GstFlowReturn +gst_ximagesrc_create (GstPushSrc * bs, GstBuffer ** buf) +{ + GstXImageSrc *s = GST_XIMAGESRC (bs); + GstXImageSrcBuffer *image; + GstClockTime base_time; + GstClockTime next_capture_ts; + GstClockTime dur; + gint64 next_frame_no; + + if (!gst_ximagesrc_recalc (s)) { + /* FIXME: Post error on the bus */ + return GST_FLOW_ERROR; + } + + if (s->fps_n <= 0 || s->fps_d <= 0) + return GST_FLOW_NOT_NEGOTIATED; /* FPS must be > 0 */ + + /* Now, we might need to wait for the next multiple of the fps + * before capturing */ + + GST_OBJECT_LOCK (s); + base_time = GST_ELEMENT_CAST (s)->base_time; + next_capture_ts = gst_clock_get_time (GST_ELEMENT_CLOCK (s)); + next_capture_ts -= base_time; + + /* Figure out which 'frame number' position we're at, based on the cur time + * and frame rate */ + next_frame_no = gst_util_uint64_scale (next_capture_ts, + s->fps_n, GST_SECOND * s->fps_d); + if (next_frame_no == s->last_frame_no) { + GstClockID id; + GstClockReturn ret; + + /* Need to wait for the next frame */ + next_frame_no += 1; + + /* Figure out what the next frame time is */ + next_capture_ts = gst_util_uint64_scale (next_frame_no, + s->fps_d * GST_SECOND, s->fps_n); + + id = gst_clock_new_single_shot_id (GST_ELEMENT_CLOCK (s), + next_capture_ts + base_time); + s->clock_id = id; + + /* release the object lock while waiting */ + GST_OBJECT_UNLOCK (s); + + GST_DEBUG_OBJECT (s, "Waiting for next frame time %" G_GUINT64_FORMAT, + next_capture_ts); + ret = gst_clock_id_wait (id, NULL); + GST_OBJECT_LOCK (s); + + gst_clock_id_unref (id); + s->clock_id = NULL; + if (ret == GST_CLOCK_UNSCHEDULED) { + /* Got woken up by the unlock function */ + GST_OBJECT_UNLOCK (s); + return GST_FLOW_WRONG_STATE; + } + /* Duration is a complete 1/fps frame duration */ + dur = gst_util_uint64_scale_int (GST_SECOND, s->fps_d, s->fps_n); + } else { + GstClockTime next_frame_ts; + + GST_DEBUG_OBJECT (s, "No need to wait for next frame time %" + G_GUINT64_FORMAT " next frame = %" G_GINT64_FORMAT " prev = %" + G_GINT64_FORMAT, next_capture_ts, next_frame_no, s->last_frame_no); + next_frame_ts = gst_util_uint64_scale (next_frame_no + 1, + s->fps_d * GST_SECOND, s->fps_n); + /* Frame duration is from now until the next expected capture time */ + dur = next_frame_ts - next_capture_ts; + } + s->last_frame_no = next_frame_no; + GST_OBJECT_UNLOCK (s); + + image = gst_ximagesrc_ximage_get (s); + if (!image) + return GST_FLOW_ERROR; + + *buf = GST_BUFFER (image); + GST_BUFFER_TIMESTAMP (*buf) = next_capture_ts; + GST_BUFFER_DURATION (*buf) = dur; + + return GST_FLOW_OK; +} + +static void +gst_ximagesrc_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + GstXImageSrc *src = GST_XIMAGESRC (object); + + switch (prop_id) { + case PROP_DISPLAY_NAME: + + g_free (src->display_name); + src->display_name = g_strdup (g_value_get_string (value)); + + // src->screen_num = MIN (src->screen_num, ScreenCount (src->display) - 1); + break; + case PROP_SCREEN_NUM: + src->screen_num = g_value_get_uint (value); + // src->screen_num = MIN (src->screen_num, ScreenCount (src->display) - 1); + break; + default: + break; + } +} + +static void +gst_ximagesrc_get_property (GObject * object, guint prop_id, GValue * value, + GParamSpec * pspec) +{ + GstXImageSrc *src = GST_XIMAGESRC (object); + + switch (prop_id) { + case PROP_DISPLAY_NAME: + if (src->xcontext) + g_value_set_string (value, DisplayString (src->xcontext->disp)); + else + g_value_set_string (value, src->display_name); + + break; + case PROP_SCREEN_NUM: + g_value_set_uint (value, src->screen_num); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +gst_ximagesrc_clear_bufpool (GstXImageSrc * ximagesrc) +{ + g_mutex_lock (ximagesrc->pool_lock); + while (ximagesrc->buffer_pool != NULL) { + GstXImageSrcBuffer *ximage = ximagesrc->buffer_pool->data; + + gst_ximage_buffer_free (ximage); + + ximagesrc->buffer_pool = g_slist_delete_link (ximagesrc->buffer_pool, + ximagesrc->buffer_pool); + } + g_mutex_unlock (ximagesrc->pool_lock); +} + +static void +gst_ximagesrc_base_init (gpointer g_class) +{ + GstElementClass *ec = GST_ELEMENT_CLASS (g_class); + + gst_element_class_set_details (ec, &ximagesrc_details); + gst_element_class_add_pad_template (ec, gst_static_pad_template_get (&t)); +} + +static void +gst_ximagesrc_dispose (GObject * object) +{ + /* Drop references in the buffer_pool */ + gst_ximagesrc_clear_bufpool (GST_XIMAGESRC (object)); +} + +static void +gst_ximagesrc_finalize (GObject * object) +{ + GstXImageSrc *src = GST_XIMAGESRC (object); + + if (src->xcontext) + ximageutil_xcontext_clear (src->xcontext); + + g_mutex_free (src->pool_lock); + g_mutex_free (src->x_lock); + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static GstCaps * +gst_ximagesrc_get_caps (GstBaseSrc * bs) +{ + GstXImageSrc *s = GST_XIMAGESRC (bs); + GstXContext *xcontext; + + if ((!s->xcontext) && (!gst_ximagesrc_open_display (s, NULL))) + return gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SRC (s)-> + srcpad)); + + if (!gst_ximagesrc_recalc (s)) + return gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SRC (s)-> + srcpad)); + + xcontext = s->xcontext; + + /* FIXME: Add PAR */ + return gst_caps_new_simple ("video/x-raw-rgb", + "bpp", G_TYPE_INT, xcontext->bpp, + "depth", G_TYPE_INT, xcontext->depth, + "endianness", G_TYPE_INT, xcontext->endianness, + "red_mask", G_TYPE_INT, xcontext->visual->red_mask, + "green_mask", G_TYPE_INT, xcontext->visual->green_mask, + "blue_mask", G_TYPE_INT, xcontext->visual->blue_mask, + "width", G_TYPE_INT, xcontext->width, + "height", G_TYPE_INT, xcontext->height, + "framerate", GST_TYPE_FRACTION_RANGE, 1, G_MAXINT, G_MAXINT, 1, NULL); +} + +static gboolean +gst_ximagesrc_set_caps (GstBaseSrc * bs, GstCaps * caps) +{ + GstXImageSrc *s = GST_XIMAGESRC (bs); + GstStructure *structure; + const GValue *new_fps; + + /* If not yet opened, disallow setcaps until later */ + if (!s->xcontext) + return FALSE; + + /* The only thing that can change is the framerate downstream wants */ + structure = gst_caps_get_structure (caps, 0); + new_fps = gst_structure_get_value (structure, "framerate"); + if (!new_fps) + return FALSE; + + /* Store this FPS for use when generating buffers */ + s->fps_n = gst_value_get_fraction_numerator (new_fps); + s->fps_d = gst_value_get_fraction_denominator (new_fps); + + GST_DEBUG_OBJECT (s, "peer wants %d/%d fps", s->fps_n, s->fps_d); + + return TRUE; +} + +static void +gst_ximagesrc_fixate (GstPad * pad, GstCaps * caps) +{ + gint i; + GstStructure *structure; + + for (i = 0; i < gst_caps_get_size (caps); ++i) { + structure = gst_caps_get_structure (caps, i); + + gst_structure_fixate_field_nearest_fraction (structure, "framerate", 25, 1); + } +} + +static void +gst_ximagesrc_class_init (GstXImageSrcClass * klass) +{ + GObjectClass *gc = G_OBJECT_CLASS (klass); + GstBaseSrcClass *bc = GST_BASE_SRC_CLASS (klass); + GstPushSrcClass *push_class = GST_PUSH_SRC_CLASS (klass); + + gc->set_property = gst_ximagesrc_set_property; + gc->get_property = gst_ximagesrc_get_property; + gc->dispose = gst_ximagesrc_dispose; + gc->finalize = gst_ximagesrc_finalize; + + g_object_class_install_property (gc, PROP_DISPLAY_NAME, + g_param_spec_string ("display_name", "Display", "X Display name", NULL, + G_PARAM_READWRITE)); + g_object_class_install_property (gc, PROP_SCREEN_NUM, + g_param_spec_uint ("screen_num", "Screen number", "X Screen number", + 0, G_MAXINT, 0, G_PARAM_READWRITE)); + + parent_class = g_type_class_ref (GST_TYPE_ELEMENT); + + push_class->create = gst_ximagesrc_create; + bc->get_caps = gst_ximagesrc_get_caps; + bc->set_caps = gst_ximagesrc_set_caps; + bc->start = gst_ximagesrc_start; + bc->stop = gst_ximagesrc_stop; + bc->unlock = gst_ximagesrc_unlock; +} + +static void +gst_ximagesrc_init (GstXImageSrc * ximagesrc, GstXImageSrcClass * klass) +{ + gst_base_src_set_live (GST_BASE_SRC (ximagesrc), TRUE); + gst_pad_set_fixatecaps_function (GST_BASE_SRC_PAD (ximagesrc), + gst_ximagesrc_fixate); + + ximagesrc->pool_lock = g_mutex_new (); + ximagesrc->x_lock = g_mutex_new (); +} + +static gboolean +plugin_init (GstPlugin * plugin) +{ + gboolean ret; + + GST_DEBUG_CATEGORY_INIT (gst_debug_ximagesrc, "ximagesrc", 0, + "ximagesrc element debug"); + + ret = gst_element_register (plugin, "ximagesrc", GST_RANK_NONE, + GST_TYPE_XIMAGESRC); + + return ret; +} + +GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, + GST_VERSION_MINOR, + "ximagesrc", + "XFree86 video input plugin based on standard Xlib calls", + plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN) |