FCL/sf/mw/gstreamer: comparison gst_plugins_base/sys/xvimage/xvimagesink.c

equal deleted inserted replaced

-:567bb019e3e3
+:7e817e7e631c
+/* GStreamer
+* Copyright (C) <2005> Julien Moutte <julien@moutte.net>
+*
+* 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.
+*/
+/**
+* SECTION:element-xvimagesink
+*
+* <refsect2>
+* <para>
+* XvImageSink renders video frames to a drawable (XWindow) on a local display
+* using the XVideo extension. Rendering to a remote display is theorically
+* possible but i doubt that the XVideo extension is actually available when
+* connecting to a remote display. This element can receive a Window ID from the
+* application through the XOverlay interface and will then render video frames
+* in this drawable. If no Window ID was provided by the application, the
+* element will create its own internal window and render into it.
+* </para>
+* <title>Scaling</title>
+* <para>
+* The XVideo extension, when it's available, handles hardware accelerated
+* scaling of video frames. This means that the element will just accept
+* incoming video frames no matter their geometry and will then put them to the
+* drawable scaling them on the fly. Using the
+* <link linkend="GstXvImageSink--force-aspect-ratio">force-aspect-ratio</link>
+* property it is possible to enforce scaling with a constant aspect ratio,
+* which means drawing black borders around the video frame.
+* </para>
+* <title>Events</title>
+* <para>
+* XvImageSink creates a thread to handle events coming from the drawable. There
+* are several kind of events that can be grouped in 2 big categories: input
+* events and window state related events. Input events will be translated to
+* navigation events and pushed upstream for other elements to react on them.
+* This includes events such as pointer moves, key press/release, clicks etc...
+* Other events are used to handle the drawable appearance even when the data
+* is not flowing (GST_STATE_PAUSED). That means that even when the element is
+* paused, it will receive expose events from the drawable and draw the latest
+* frame with correct borders/aspect-ratio.
+* </para>
+* <title>Pixel aspect ratio</title>
+* <para>
+* When changing state to GST_STATE_READY, XvImageSink will open a connection to
+* the display specified in the
+* <link linkend="GstXvImageSink--display">display</link> property or the
+* default display if nothing specified. Once this connection is open it will
+* inspect the display configuration including the physical display geometry and
+* then calculate the pixel aspect ratio. When receiving video frames with a
+* different pixel aspect ratio, XvImageSink will use hardware scaling to
+* display the video frames correctly on display's pixel aspect ratio.
+* Sometimes the calculated pixel aspect ratio can be wrong, it is
+* then possible to enforce a specific pixel aspect ratio using the
+* <link linkend="GstXvImageSink--pixel-aspect-ratio">pixel-aspect-ratio</link>
+* property.
+* </para>
+* <title>Examples</title>
+* <para>
+* Here is a simple pipeline to test hardware scaling :
+* <programlisting>
+* gst-launch -v videotestsrc ! xvimagesink
+* </programlisting>
+* When the test video signal appears you can resize the window and see that
+* video frames are scaled through hardware (no extra CPU cost). You can try
+* again setting the force-aspect-ratio property to true and observe the borders
+* drawn around the scaled image respecting aspect ratio.
+* <programlisting>
+* gst-launch -v videotestsrc ! xvimagesink force-aspect-ratio=true
+* </programlisting>
+* </para>
+* <para>
+* Here is a simple pipeline to test navigation events :
+* <programlisting>
+* gst-launch -v videotestsrc ! navigationtest ! xvimagesink
+* </programlisting>
+* While moving the mouse pointer over the test signal you will see a black box
+* following the mouse pointer. If you press the mouse button somewhere on the
+* video and release it somewhere else a green box will appear where you pressed
+* the button and a red one where you released it. (The navigationtest element
+* is part of gst-plugins-good.) You can observe here that even if the images
+* are scaled through hardware the pointer coordinates are converted back to the
+* original video frame geometry so that the box can be drawn to the correct
+* position. This also handles borders correctly, limiting coordinates to the
+* image area
+* </para>
+* <para>
+* Here is a simple pipeline to test pixel aspect ratio :
+* <programlisting>
+* gst-launch -v videotestsrc ! video/x-raw-yuv, pixel-aspect-ratio=(fraction)4/3 ! xvimagesink
+* </programlisting>
+* This is faking a 4/3 pixel aspect ratio caps on video frames produced by
+* videotestsrc, in most cases the pixel aspect ratio of the display will be
+* 1/1. This means that XvImageSink will have to do the scaling to convert
+* incoming frames to a size that will match the display pixel aspect ratio
+* (from 320x240 to 320x180 in this case). Note that you might have to escape
+* some characters for your shell like '\(fraction\)'.
+* </para>
+* <para>
+* Here is a test pipeline to test the colorbalance interface :
+* <programlisting>
+* gst-launch -v videotestsrc ! xvimagesink hue=100 saturation=-100 brightness=100
+* </programlisting>
+* </para>
+* </refsect2>
+*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+/* Our interfaces */
+#include <gst/interfaces/navigation.h>
+#include <gst/interfaces/xoverlay.h>
+#include <gst/interfaces/colorbalance.h>
+#include <gst/interfaces/propertyprobe.h>
+/* Helper functions */
+#include <gst/video/video.h>
+/* Object header */
+#include "xvimagesink.h"
+/* Debugging category */
+#include <gst/gstinfo.h>
+GST_DEBUG_CATEGORY_STATIC (gst_debug_xvimagesink);
+#define GST_CAT_DEFAULT gst_debug_xvimagesink
+typedef struct
+{
+unsigned long flags;
+unsigned long functions;
+unsigned long decorations;
+long input_mode;
+unsigned long status;
+}
+MotifWmHints, MwmHints;
+#define MWM_HINTS_DECORATIONS   (1L << 1)
+static void gst_xvimagesink_reset (GstXvImageSink * xvimagesink);
+static GstBufferClass *xvimage_buffer_parent_class = NULL;
+static void gst_xvimage_buffer_finalize (GstXvImageBuffer * xvimage);
+static void gst_xvimagesink_xwindow_update_geometry (GstXvImageSink *
+xvimagesink, GstXWindow * xwindow);
+static gint gst_xvimagesink_get_format_from_caps (GstXvImageSink * xvimagesink,
+GstCaps * caps);
+static void gst_xvimagesink_expose (GstXOverlay * overlay);
+/* ElementFactory information */
+static const GstElementDetails gst_xvimagesink_details =
+GST_ELEMENT_DETAILS ("Video sink",
+"Sink/Video",
+"A Xv based videosink",
+"Julien Moutte <julien@moutte.net>");
+/* Default template - initiated with class struct to allow gst-register to work
+without X running */
+static GstStaticPadTemplate gst_xvimagesink_sink_template_factory =
+GST_STATIC_PAD_TEMPLATE ("sink",
+GST_PAD_SINK,
+GST_PAD_ALWAYS,
+GST_STATIC_CAPS ("video/x-raw-rgb, "
+"framerate = (fraction) [ 0, MAX ], "
+"width = (int) [ 1, MAX ], "
+"height = (int) [ 1, MAX ]; "
+"video/x-raw-yuv, "
+"framerate = (fraction) [ 0, MAX ], "
+"width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")
+);
+enum
+{
+ARG_0,
+ARG_CONTRAST,
+ARG_BRIGHTNESS,
+ARG_HUE,
+ARG_SATURATION,
+ARG_DISPLAY,
+ARG_SYNCHRONOUS,
+ARG_PIXEL_ASPECT_RATIO,
+ARG_FORCE_ASPECT_RATIO,
+ARG_HANDLE_EVENTS,
+ARG_DEVICE,
+ARG_DEVICE_NAME,
+ARG_HANDLE_EXPOSE,
+ARG_DOUBLE_BUFFER
+};
+static GstVideoSinkClass *parent_class = NULL;
+/* ============================================================= */
+/*                                                               */
+/*                       Private Methods                         */
+/*                                                               */
+/* ============================================================= */
+/* xvimage buffers */
+#define GST_TYPE_XVIMAGE_BUFFER (gst_xvimage_buffer_get_type())
+#define GST_IS_XVIMAGE_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_XVIMAGE_BUFFER))
+#define GST_XVIMAGE_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_XVIMAGE_BUFFER, GstXvImageBuffer))
+/* This function destroys a GstXvImage handling XShm availability */
+static void
+gst_xvimage_buffer_destroy (GstXvImageBuffer * xvimage)
+{
+GstXvImageSink *xvimagesink;
+GST_DEBUG_OBJECT (xvimage, "Destroying buffer");
+xvimagesink = xvimage->xvimagesink;
+if (G_UNLIKELY (xvimagesink == NULL))
+goto no_sink;
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+GST_OBJECT_LOCK (xvimagesink);
+/* If the destroyed image is the current one we destroy our reference too */
+if (xvimagesink->cur_image == xvimage)
+xvimagesink->cur_image = NULL;
+/* We might have some buffers destroyed after changing state to NULL */
+if (xvimagesink->xcontext == NULL) {
+GST_DEBUG_OBJECT (xvimagesink, "Destroying XvImage after Xcontext");
+#ifdef HAVE_XSHM
+/* Need to free the shared memory segment even if the x context
+* was already cleaned up */
+if (xvimage->SHMInfo.shmaddr != ((void *) -1)) {
+shmdt (xvimage->SHMInfo.shmaddr);
+}
+#endif
+goto beach;
+}
+g_mutex_lock (xvimagesink->x_lock);
+#ifdef HAVE_XSHM
+if (xvimagesink->xcontext->use_xshm) {
+if (xvimage->SHMInfo.shmaddr != ((void *) -1)) {
+GST_DEBUG_OBJECT (xvimagesink, "XServer ShmDetaching from 0x%x id 0x%lx",
+xvimage->SHMInfo.shmid, xvimage->SHMInfo.shmseg);
+XShmDetach (xvimagesink->xcontext->disp, &xvimage->SHMInfo);
+XSync (xvimagesink->xcontext->disp, FALSE);
+shmdt (xvimage->SHMInfo.shmaddr);
+}
+if (xvimage->xvimage)
+XFree (xvimage->xvimage);
+} else
+#endif /* HAVE_XSHM */
+{
+if (xvimage->xvimage) {
+if (xvimage->xvimage->data) {
+g_free (xvimage->xvimage->data);
+}
+XFree (xvimage->xvimage);
+}
+}
+XSync (xvimagesink->xcontext->disp, FALSE);
+g_mutex_unlock (xvimagesink->x_lock);
+beach:
+GST_OBJECT_UNLOCK (xvimagesink);
+xvimage->xvimagesink = NULL;
+gst_object_unref (xvimagesink);
+GST_MINI_OBJECT_CLASS (xvimage_buffer_parent_class)->
+finalize (GST_MINI_OBJECT (xvimage));
+return;
+no_sink:
+{
+GST_WARNING ("no sink found");
+return;
+}
+}
+static void
+gst_xvimage_buffer_finalize (GstXvImageBuffer * xvimage)
+{
+GstXvImageSink *xvimagesink;
+gboolean running;
+xvimagesink = xvimage->xvimagesink;
+if (G_UNLIKELY (xvimagesink == NULL))
+goto no_sink;
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+GST_OBJECT_LOCK (xvimagesink);
+running = xvimagesink->running;
+GST_OBJECT_UNLOCK (xvimagesink);
+/* If our geometry changed we can't reuse that image. */
+if (running == FALSE) {
+GST_LOG_OBJECT (xvimage, "destroy image as sink is shutting down");
+gst_xvimage_buffer_destroy (xvimage);
+} else if ((xvimage->width != xvimagesink->video_width) ||
+(xvimage->height != xvimagesink->video_height)) {
+GST_LOG_OBJECT (xvimage,
+"destroy image as its size changed %dx%d vs current %dx%d",
+xvimage->width, xvimage->height,
+xvimagesink->video_width, xvimagesink->video_height);
+gst_xvimage_buffer_destroy (xvimage);
+} else {
+/* In that case we can reuse the image and add it to our image pool. */
+GST_LOG_OBJECT (xvimage, "recycling image in pool");
+/* need to increment the refcount again to recycle */
+gst_buffer_ref (GST_BUFFER (xvimage));
+g_mutex_lock (xvimagesink->pool_lock);
+xvimagesink->image_pool = g_slist_prepend (xvimagesink->image_pool,
+xvimage);
+g_mutex_unlock (xvimagesink->pool_lock);
+}
+return;
+no_sink:
+{
+GST_WARNING ("no sink found");
+return;
+}
+}
+static void
+gst_xvimage_buffer_free (GstXvImageBuffer * xvimage)
+{
+/* make sure it is not recycled */
+xvimage->width = -1;
+xvimage->height = -1;
+gst_buffer_unref (GST_BUFFER (xvimage));
+}
+static void
+gst_xvimage_buffer_init (GstXvImageBuffer * xvimage, gpointer g_class)
+{
+#ifdef HAVE_XSHM
+xvimage->SHMInfo.shmaddr = ((void *) -1);
+xvimage->SHMInfo.shmid = -1;
+#endif
+}
+static void
+gst_xvimage_buffer_class_init (gpointer g_class, gpointer class_data)
+{
+GstMiniObjectClass *mini_object_class = GST_MINI_OBJECT_CLASS (g_class);
+xvimage_buffer_parent_class = g_type_class_peek_parent (g_class);
+mini_object_class->finalize = (GstMiniObjectFinalizeFunction)
+gst_xvimage_buffer_finalize;
+}
+static GType
+gst_xvimage_buffer_get_type (void)
+{
+static GType _gst_xvimage_buffer_type;
+if (G_UNLIKELY (_gst_xvimage_buffer_type == 0)) {
+static const GTypeInfo xvimage_buffer_info = {
+sizeof (GstBufferClass),
+NULL,
+NULL,
+gst_xvimage_buffer_class_init,
+NULL,
+NULL,
+sizeof (GstXvImageBuffer),
+0,
+(GInstanceInitFunc) gst_xvimage_buffer_init,
+NULL
+};
+_gst_xvimage_buffer_type = g_type_register_static (GST_TYPE_BUFFER,
+"GstXvImageBuffer", &xvimage_buffer_info, 0);
+}
+return _gst_xvimage_buffer_type;
+}
+/* X11 stuff */
+static gboolean error_caught = FALSE;
+static int
+gst_xvimagesink_handle_xerror (Display * display, XErrorEvent * xevent)
+{
+char error_msg[1024];
+XGetErrorText (display, xevent->error_code, error_msg, 1024);
+GST_DEBUG ("xvimagesink triggered an XError. error: %s", error_msg);
+error_caught = TRUE;
+return 0;
+}
+#ifdef HAVE_XSHM
+/* This function checks that it is actually really possible to create an image
+using XShm */
+static gboolean
+gst_xvimagesink_check_xshm_calls (GstXContext * xcontext)
+{
+XvImage *xvimage;
+XShmSegmentInfo SHMInfo;
+gint size;
+int (*handler) (Display *, XErrorEvent *);
+gboolean result = FALSE;
+gboolean did_attach = FALSE;
+g_return_val_if_fail (xcontext != NULL, FALSE);
+/* Sync to ensure any older errors are already processed */
+XSync (xcontext->disp, FALSE);
+/* Set defaults so we don't free these later unnecessarily */
+SHMInfo.shmaddr = ((void *) -1);
+SHMInfo.shmid = -1;
+/* Setting an error handler to catch failure */
+error_caught = FALSE;
+handler = XSetErrorHandler (gst_xvimagesink_handle_xerror);
+/* Trying to create a 1x1 picture */
+GST_DEBUG ("XvShmCreateImage of 1x1");
+xvimage = XvShmCreateImage (xcontext->disp, xcontext->xv_port_id,
+xcontext->im_format, NULL, 1, 1, &SHMInfo);
+/* Might cause an error, sync to ensure it is noticed */
+XSync (xcontext->disp, FALSE);
+if (!xvimage || error_caught) {
+GST_WARNING ("could not XvShmCreateImage a 1x1 image");
+goto beach;
+}
+size = xvimage->data_size;
+SHMInfo.shmid = shmget (IPC_PRIVATE, size, IPC_CREAT | 0777);
+if (SHMInfo.shmid == -1) {
+GST_WARNING ("could not get shared memory of %d bytes", size);
+goto beach;
+}
+SHMInfo.shmaddr = shmat (SHMInfo.shmid, NULL, 0);
+if (SHMInfo.shmaddr == ((void *) -1)) {
+GST_WARNING ("Failed to shmat: %s", g_strerror (errno));
+/* Clean up the shared memory segment */
+shmctl (SHMInfo.shmid, IPC_RMID, NULL);
+goto beach;
+}
+/* Delete the shared memory segment as soon as we manage to attach.
+* This way, it will be deleted as soon as we detach later, and not
+* leaked if we crash. */
+shmctl (SHMInfo.shmid, IPC_RMID, NULL);
+xvimage->data = SHMInfo.shmaddr;
+SHMInfo.readOnly = FALSE;
+if (XShmAttach (xcontext->disp, &SHMInfo) == 0) {
+GST_WARNING ("Failed to XShmAttach");
+goto beach;
+}
+/* Sync to ensure we see any errors we caused */
+XSync (xcontext->disp, FALSE);
+GST_DEBUG ("XServer ShmAttached to 0x%x, id 0x%lx", SHMInfo.shmid,
+SHMInfo.shmseg);
+if (!error_caught) {
+did_attach = TRUE;
+/* store whether we succeeded in result */
+result = TRUE;
+}
+beach:
+/* Sync to ensure we swallow any errors we caused and reset error_caught */
+XSync (xcontext->disp, FALSE);
+error_caught = FALSE;
+XSetErrorHandler (handler);
+if (did_attach) {
+GST_DEBUG ("XServer ShmDetaching from 0x%x id 0x%lx",
+SHMInfo.shmid, SHMInfo.shmseg);
+XShmDetach (xcontext->disp, &SHMInfo);
+XSync (xcontext->disp, FALSE);
+}
+if (SHMInfo.shmaddr != ((void *) -1))
+shmdt (SHMInfo.shmaddr);
+if (xvimage)
+XFree (xvimage);
+return result;
+}
+#endif /* HAVE_XSHM */
+/* This function handles GstXvImage creation depending on XShm availability */
+static GstXvImageBuffer *
+gst_xvimagesink_xvimage_new (GstXvImageSink * xvimagesink, GstCaps * caps)
+{
+GstXvImageBuffer *xvimage = NULL;
+GstStructure *structure = NULL;
+gboolean succeeded = FALSE;
+int (*handler) (Display *, XErrorEvent *);
+g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), NULL);
+xvimage = (GstXvImageBuffer *) gst_mini_object_new (GST_TYPE_XVIMAGE_BUFFER);
+GST_DEBUG_OBJECT (xvimage, "Creating new XvImageBuffer");
+structure = gst_caps_get_structure (caps, 0);
+if (!gst_structure_get_int (structure, "width", &xvimage->width) ||
+!gst_structure_get_int (structure, "height", &xvimage->height)) {
+GST_WARNING ("failed getting geometry from caps %" GST_PTR_FORMAT, caps);
+}
+GST_LOG_OBJECT (xvimagesink, "creating %dx%d", xvimage->width,
+xvimage->height);
+xvimage->im_format = gst_xvimagesink_get_format_from_caps (xvimagesink, caps);
+if (xvimage->im_format == -1) {
+GST_WARNING_OBJECT (xvimagesink, "failed to get format from caps %"
+GST_PTR_FORMAT, caps);
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
+("Failed to create output image buffer of %dx%d pixels",
+xvimage->width, xvimage->height), ("Invalid input caps"));
+goto beach_unlocked;
+}
+xvimage->xvimagesink = gst_object_ref (xvimagesink);
+g_mutex_lock (xvimagesink->x_lock);
+/* Setting an error handler to catch failure */
+error_caught = FALSE;
+handler = XSetErrorHandler (gst_xvimagesink_handle_xerror);
+#ifdef HAVE_XSHM
+if (xvimagesink->xcontext->use_xshm) {
+int expected_size;
+xvimage->xvimage = XvShmCreateImage (xvimagesink->xcontext->disp,
+xvimagesink->xcontext->xv_port_id,
+xvimage->im_format, NULL,
+xvimage->width, xvimage->height, &xvimage->SHMInfo);
+if (!xvimage->xvimage || error_caught) {
+g_mutex_unlock (xvimagesink->x_lock);
+/* Reset error handler */
+error_caught = FALSE;
+XSetErrorHandler (handler);
+/* Push an error */
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
+("Failed to create output image buffer of %dx%d pixels",
+xvimage->width, xvimage->height),
+("could not XvShmCreateImage a %dx%d image",
+xvimage->width, xvimage->height));
+goto beach_unlocked;
+}
+/* we have to use the returned data_size for our shm size */
+xvimage->size = xvimage->xvimage->data_size;
+GST_LOG_OBJECT (xvimagesink, "XShm image size is %" G_GSIZE_FORMAT,
+xvimage->size);
+/* calculate the expected size.  This is only for sanity checking the
+* number we get from X. */
+switch (xvimage->im_format) {
+case GST_MAKE_FOURCC ('I', '4', '2', '0'):
+expected_size =
+GST_ROUND_UP_2 (xvimage->height) * GST_ROUND_UP_4 (xvimage->width);
+expected_size +=
+GST_ROUND_UP_2 (xvimage->height) * GST_ROUND_UP_8 (xvimage->width) /
+2;
+break;
+case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
+case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
+case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
+expected_size = xvimage->height * GST_ROUND_UP_4 (xvimage->width * 2);
+break;
+default:
+expected_size = 0;
+break;
+}
+if (expected_size != 0 && xvimage->size != expected_size) {
+GST_WARNING_OBJECT (xvimagesink,
+"unexpected XShm image size (got %" G_GSIZE_FORMAT ", expected %d)",
+xvimage->size, expected_size);
+}
+/* Be verbose about our XvImage stride */
+{
+guint plane;
+for (plane = 0; plane < xvimage->xvimage->num_planes; plane++) {
+GST_DEBUG_OBJECT (xvimagesink, "Plane %u has a pitch of %d bytes, "
+"offset of %d", plane, xvimage->xvimage->pitches[plane],
+xvimage->xvimage->offsets[plane]);
+}
+}
+xvimage->SHMInfo.shmid = shmget (IPC_PRIVATE, xvimage->size,
+IPC_CREAT | 0777);
+if (xvimage->SHMInfo.shmid == -1) {
+g_mutex_unlock (xvimagesink->x_lock);
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
+("Failed to create output image buffer of %dx%d pixels",
+xvimage->width, xvimage->height),
+("could not get shared memory of %" G_GSIZE_FORMAT " bytes",
+xvimage->size));
+goto beach_unlocked;
+}
+xvimage->SHMInfo.shmaddr = shmat (xvimage->SHMInfo.shmid, NULL, 0);
+if (xvimage->SHMInfo.shmaddr == ((void *) -1)) {
+g_mutex_unlock (xvimagesink->x_lock);
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
+("Failed to create output image buffer of %dx%d pixels",
+xvimage->width, xvimage->height),
+("Failed to shmat: %s", g_strerror (errno)));
+/* Clean up the shared memory segment */
+shmctl (xvimage->SHMInfo.shmid, IPC_RMID, NULL);
+goto beach_unlocked;
+}
+/* Delete the shared memory segment as soon as we manage to attach.
+* This way, it will be deleted as soon as we detach later, and not
+* leaked if we crash. */
+shmctl (xvimage->SHMInfo.shmid, IPC_RMID, NULL);
+xvimage->xvimage->data = xvimage->SHMInfo.shmaddr;
+xvimage->SHMInfo.readOnly = FALSE;
+if (XShmAttach (xvimagesink->xcontext->disp, &xvimage->SHMInfo) == 0) {
+g_mutex_unlock (xvimagesink->x_lock);
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
+("Failed to create output image buffer of %dx%d pixels",
+xvimage->width, xvimage->height), ("Failed to XShmAttach"));
+goto beach_unlocked;
+}
+XSync (xvimagesink->xcontext->disp, FALSE);
+GST_DEBUG_OBJECT (xvimagesink, "XServer ShmAttached to 0x%x, id 0x%lx",
+xvimage->SHMInfo.shmid, xvimage->SHMInfo.shmseg);
+} else
+#endif /* HAVE_XSHM */
+{
+xvimage->xvimage = XvCreateImage (xvimagesink->xcontext->disp,
+xvimagesink->xcontext->xv_port_id,
+xvimage->im_format, NULL, xvimage->width, xvimage->height);
+if (!xvimage->xvimage || error_caught) {
+g_mutex_unlock (xvimagesink->x_lock);
+/* Reset error handler */
+error_caught = FALSE;
+XSetErrorHandler (handler);
+/* Push an error */
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
+("Failed to create outputimage buffer of %dx%d pixels",
+xvimage->width, xvimage->height),
+("could not XvCreateImage a %dx%d image",
+xvimage->width, xvimage->height));
+goto beach_unlocked;
+}
+/* we have to use the returned data_size for our image size */
+xvimage->size = xvimage->xvimage->data_size;
+xvimage->xvimage->data = g_malloc (xvimage->size);
+XSync (xvimagesink->xcontext->disp, FALSE);
+}
+/* Reset error handler */
+error_caught = FALSE;
+XSetErrorHandler (handler);
+succeeded = TRUE;
+GST_BUFFER_DATA (xvimage) = (guchar *) xvimage->xvimage->data;
+GST_BUFFER_SIZE (xvimage) = xvimage->size;
+g_mutex_unlock (xvimagesink->x_lock);
+beach_unlocked:
+if (!succeeded) {
+gst_xvimage_buffer_free (xvimage);
+xvimage = NULL;
+}
+return xvimage;
+}
+/* We are called with the x_lock taken */
+static void
+gst_xvimagesink_xwindow_draw_borders (GstXvImageSink * xvimagesink,
+GstXWindow * xwindow, GstVideoRectangle rect)
+{
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+g_return_if_fail (xwindow != NULL);
+XSetForeground (xvimagesink->xcontext->disp, xwindow->gc,
+xvimagesink->xcontext->black);
+/* Left border */
+if (rect.x > 0) {
+XFillRectangle (xvimagesink->xcontext->disp, xwindow->win, xwindow->gc,
+0, 0, rect.x, xwindow->height);
+}
+/* Right border */
+if ((rect.x + rect.w) < xwindow->width) {
+XFillRectangle (xvimagesink->xcontext->disp, xwindow->win, xwindow->gc,
+rect.x + rect.w, 0, xwindow->width, xwindow->height);
+}
+/* Top border */
+if (rect.y > 0) {
+XFillRectangle (xvimagesink->xcontext->disp, xwindow->win, xwindow->gc,
+0, 0, xwindow->width, rect.y);
+}
+/* Bottom border */
+if ((rect.y + rect.h) < xwindow->height) {
+XFillRectangle (xvimagesink->xcontext->disp, xwindow->win, xwindow->gc,
+0, rect.y + rect.h, xwindow->width, xwindow->height);
+}
+}
+/* This function puts a GstXvImage on a GstXvImageSink's window. Returns FALSE
+* if no window was available  */
+static gboolean
+gst_xvimagesink_xvimage_put (GstXvImageSink * xvimagesink,
+GstXvImageBuffer * xvimage)
+{
+GstVideoRectangle src, dst, result;
+gboolean draw_border = FALSE;
+g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), FALSE);
+/* We take the flow_lock. If expose is in there we don't want to run
+concurrently from the data flow thread */
+g_mutex_lock (xvimagesink->flow_lock);
+if (G_UNLIKELY (xvimagesink->xwindow == NULL)) {
+g_mutex_unlock (xvimagesink->flow_lock);
+return FALSE;
+}
+/* Draw borders when displaying the first frame. After this
+draw borders only on expose event or after a size change. */
+if (!xvimagesink->cur_image || xvimagesink->draw_border) {
+draw_border = TRUE;
+xvimagesink->draw_border = FALSE;
+}
+/* Store a reference to the last image we put, lose the previous one */
+if (xvimage && xvimagesink->cur_image != xvimage) {
+if (xvimagesink->cur_image) {
+GST_LOG_OBJECT (xvimagesink, "unreffing %p", xvimagesink->cur_image);
+gst_buffer_unref (xvimagesink->cur_image);
+}
+GST_LOG_OBJECT (xvimagesink, "reffing %p as our current image", xvimage);
+xvimagesink->cur_image =
+GST_XVIMAGE_BUFFER (gst_buffer_ref (GST_BUFFER (xvimage)));
+}
+/* Expose sends a NULL image, we take the latest frame */
+if (!xvimage) {
+draw_border = TRUE;
+if (xvimagesink->cur_image) {
+xvimage = xvimagesink->cur_image;
+} else {
+g_mutex_unlock (xvimagesink->flow_lock);
+return TRUE;
+}
+}
+gst_xvimagesink_xwindow_update_geometry (xvimagesink, xvimagesink->xwindow);
+/* We use the calculated geometry from _setcaps as a source to respect
+source and screen pixel aspect ratios. */
+src.w = GST_VIDEO_SINK_WIDTH (xvimagesink);
+src.h = GST_VIDEO_SINK_HEIGHT (xvimagesink);
+dst.w = xvimagesink->xwindow->width;
+dst.h = xvimagesink->xwindow->height;
+if (xvimagesink->keep_aspect) {
+gst_video_sink_center_rect (src, dst, &result, TRUE);
+} else {
+result.x = result.y = 0;
+result.w = dst.w;
+result.h = dst.h;
+}
+g_mutex_lock (xvimagesink->x_lock);
+if (draw_border) {
+gst_xvimagesink_xwindow_draw_borders (xvimagesink, xvimagesink->xwindow,
+result);
+}
+/* We scale to the window's geometry */
+#ifdef HAVE_XSHM
+if (xvimagesink->xcontext->use_xshm) {
+GST_LOG_OBJECT (xvimagesink,
+"XvShmPutImage with image %dx%d and window %dx%d, from xvimage %"
+GST_PTR_FORMAT,
+xvimage->width, xvimage->height,
+xvimagesink->xwindow->width, xvimagesink->xwindow->height, xvimage);
+XvShmPutImage (xvimagesink->xcontext->disp,
+xvimagesink->xcontext->xv_port_id,
+xvimagesink->xwindow->win,
+xvimagesink->xwindow->gc, xvimage->xvimage,
+0, 0, xvimage->width, xvimage->height,
+result.x, result.y, result.w, result.h, FALSE);
+} else
+#endif /* HAVE_XSHM */
+{
+XvPutImage (xvimagesink->xcontext->disp,
+xvimagesink->xcontext->xv_port_id,
+xvimagesink->xwindow->win,
+xvimagesink->xwindow->gc, xvimage->xvimage,
+0, 0, xvimage->width, xvimage->height,
+result.x, result.y, result.w, result.h);
+}
+XSync (xvimagesink->xcontext->disp, FALSE);
+g_mutex_unlock (xvimagesink->x_lock);
+g_mutex_unlock (xvimagesink->flow_lock);
+return TRUE;
+}
+static gboolean
+gst_xvimagesink_xwindow_decorate (GstXvImageSink * xvimagesink,
+GstXWindow * window)
+{
+Atom hints_atom = None;
+MotifWmHints *hints;
+g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), FALSE);
+g_return_val_if_fail (window != NULL, FALSE);
+g_mutex_lock (xvimagesink->x_lock);
+hints_atom = XInternAtom (xvimagesink->xcontext->disp, "_MOTIF_WM_HINTS",
+True);
+if (hints_atom == None) {
+g_mutex_unlock (xvimagesink->x_lock);
+return FALSE;
+}
+hints = g_malloc0 (sizeof (MotifWmHints));
+hints->flags |= MWM_HINTS_DECORATIONS;
+hints->decorations = 1 << 0;
+XChangeProperty (xvimagesink->xcontext->disp, window->win,
+hints_atom, hints_atom, 32, PropModeReplace,
+(guchar *) hints, sizeof (MotifWmHints) / sizeof (long));
+XSync (xvimagesink->xcontext->disp, FALSE);
+g_mutex_unlock (xvimagesink->x_lock);
+g_free (hints);
+return TRUE;
+}
+/* This function handles a GstXWindow creation
+* The width and height are the actual pixel size on the display */
+static GstXWindow *
+gst_xvimagesink_xwindow_new (GstXvImageSink * xvimagesink,
+gint width, gint height)
+{
+GstXWindow *xwindow = NULL;
+XGCValues values;
+g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), NULL);
+xwindow = g_new0 (GstXWindow, 1);
+xwindow->width = width;
+xwindow->height = height;
+xwindow->internal = TRUE;
+g_mutex_lock (xvimagesink->x_lock);
+xwindow->win = XCreateSimpleWindow (xvimagesink->xcontext->disp,
+xvimagesink->xcontext->root,
+0, 0, xwindow->width, xwindow->height,
+0, 0, xvimagesink->xcontext->black);
+/* We have to do that to prevent X from redrawing the background on
+* ConfigureNotify. This takes away flickering of video when resizing. */
+XSetWindowBackgroundPixmap (xvimagesink->xcontext->disp, xwindow->win, None);
+if (xvimagesink->handle_events) {
+Atom wm_delete;
+XSelectInput (xvimagesink->xcontext->disp, xwindow->win, ExposureMask |
+StructureNotifyMask | PointerMotionMask | KeyPressMask |
+KeyReleaseMask | ButtonPressMask | ButtonReleaseMask);
+/* Tell the window manager we'd like delete client messages instead of
+* being killed */
+wm_delete = XInternAtom (xvimagesink->xcontext->disp,
+"WM_DELETE_WINDOW", True);
+if (wm_delete != None) {
+(void) XSetWMProtocols (xvimagesink->xcontext->disp, xwindow->win,
+&wm_delete, 1);
+}
+}
+xwindow->gc = XCreateGC (xvimagesink->xcontext->disp,
+xwindow->win, 0, &values);
+XMapRaised (xvimagesink->xcontext->disp, xwindow->win);
+XSync (xvimagesink->xcontext->disp, FALSE);
+g_mutex_unlock (xvimagesink->x_lock);
+gst_xvimagesink_xwindow_decorate (xvimagesink, xwindow);
+gst_x_overlay_got_xwindow_id (GST_X_OVERLAY (xvimagesink), xwindow->win);
+return xwindow;
+}
+/* This function destroys a GstXWindow */
+static void
+gst_xvimagesink_xwindow_destroy (GstXvImageSink * xvimagesink,
+GstXWindow * xwindow)
+{
+g_return_if_fail (xwindow != NULL);
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+g_mutex_lock (xvimagesink->x_lock);
+/* If we did not create that window we just free the GC and let it live */
+if (xwindow->internal)
+XDestroyWindow (xvimagesink->xcontext->disp, xwindow->win);
+else
+XSelectInput (xvimagesink->xcontext->disp, xwindow->win, 0);
+XFreeGC (xvimagesink->xcontext->disp, xwindow->gc);
+XSync (xvimagesink->xcontext->disp, FALSE);
+g_mutex_unlock (xvimagesink->x_lock);
+g_free (xwindow);
+}
+static void
+gst_xvimagesink_xwindow_update_geometry (GstXvImageSink * xvimagesink,
+GstXWindow * xwindow)
+{
+XWindowAttributes attr;
+g_return_if_fail (xwindow != NULL);
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+/* Update the window geometry */
+g_mutex_lock (xvimagesink->x_lock);
+XGetWindowAttributes (xvimagesink->xcontext->disp,
+xvimagesink->xwindow->win, &attr);
+xvimagesink->xwindow->width = attr.width;
+xvimagesink->xwindow->height = attr.height;
+g_mutex_unlock (xvimagesink->x_lock);
+}
+static void
+gst_xvimagesink_xwindow_clear (GstXvImageSink * xvimagesink,
+GstXWindow * xwindow)
+{
+g_return_if_fail (xwindow != NULL);
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+g_mutex_lock (xvimagesink->x_lock);
+XvStopVideo (xvimagesink->xcontext->disp, xvimagesink->xcontext->xv_port_id,
+xwindow->win);
+XSetForeground (xvimagesink->xcontext->disp, xwindow->gc,
+xvimagesink->xcontext->black);
+XFillRectangle (xvimagesink->xcontext->disp, xwindow->win, xwindow->gc,
+0, 0, xwindow->width, xwindow->height);
+XSync (xvimagesink->xcontext->disp, FALSE);
+g_mutex_unlock (xvimagesink->x_lock);
+}
+/* This function commits our internal colorbalance settings to our grabbed Xv
+port. If the xcontext is not initialized yet it simply returns */
+static void
+gst_xvimagesink_update_colorbalance (GstXvImageSink * xvimagesink)
+{
+GList *channels = NULL;
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+/* If we haven't initialized the X context we can't update anything */
+if (xvimagesink->xcontext == NULL)
+return;
+/* For each channel of the colorbalance we calculate the correct value
+doing range conversion and then set the Xv port attribute to match our
+values. */
+channels = xvimagesink->xcontext->channels_list;
+while (channels) {
+if (channels->data && GST_IS_COLOR_BALANCE_CHANNEL (channels->data)) {
+GstColorBalanceChannel *channel = NULL;
+Atom prop_atom;
+gint value = 0;
+gdouble convert_coef;
+channel = GST_COLOR_BALANCE_CHANNEL (channels->data);
+g_object_ref (channel);
+/* Our range conversion coef */
+convert_coef = (channel->max_value - channel->min_value) / 2000.0;
+if (g_ascii_strcasecmp (channel->label, "XV_HUE") == 0) {
+value = (xvimagesink->hue + 1000) * convert_coef + channel->min_value;
+} else if (g_ascii_strcasecmp (channel->label, "XV_SATURATION") == 0) {
+value = (xvimagesink->saturation + 1000) * convert_coef +
+channel->min_value;
+} else if (g_ascii_strcasecmp (channel->label, "XV_CONTRAST") == 0) {
+value = (xvimagesink->contrast + 1000) * convert_coef +
+channel->min_value;
+} else if (g_ascii_strcasecmp (channel->label, "XV_BRIGHTNESS") == 0) {
+value = (xvimagesink->brightness + 1000) * convert_coef +
+channel->min_value;
+} else {
+g_warning ("got an unknown channel %s", channel->label);
+g_object_unref (channel);
+return;
+}
+/* Committing to Xv port */
+g_mutex_lock (xvimagesink->x_lock);
+prop_atom =
+XInternAtom (xvimagesink->xcontext->disp, channel->label, True);
+if (prop_atom != None) {
+XvSetPortAttribute (xvimagesink->xcontext->disp,
+xvimagesink->xcontext->xv_port_id, prop_atom, value);
+}
+g_mutex_unlock (xvimagesink->x_lock);
+g_object_unref (channel);
+}
+channels = g_list_next (channels);
+}
+}
+/* This function handles XEvents that might be in the queue. It generates
+GstEvent that will be sent upstream in the pipeline to handle interactivity
+and navigation. It will also listen for configure events on the window to
+trigger caps renegotiation so on the fly software scaling can work. */
+static void
+gst_xvimagesink_handle_xevents (GstXvImageSink * xvimagesink)
+{
+XEvent e;
+guint pointer_x = 0, pointer_y = 0;
+gboolean pointer_moved = FALSE;
+gboolean exposed = FALSE, configured = FALSE;
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+/* We get all pointer motion events, only the last position is
+interesting. */
+g_mutex_lock (xvimagesink->flow_lock);
+g_mutex_lock (xvimagesink->x_lock);
+while (XCheckWindowEvent (xvimagesink->xcontext->disp,
+xvimagesink->xwindow->win, PointerMotionMask, &e)) {
+g_mutex_unlock (xvimagesink->x_lock);
+g_mutex_unlock (xvimagesink->flow_lock);
+switch (e.type) {
+case MotionNotify:
+pointer_x = e.xmotion.x;
+pointer_y = e.xmotion.y;
+pointer_moved = TRUE;
+break;
+default:
+break;
+}
+g_mutex_lock (xvimagesink->flow_lock);
+g_mutex_lock (xvimagesink->x_lock);
+}
+if (pointer_moved) {
+g_mutex_unlock (xvimagesink->x_lock);
+g_mutex_unlock (xvimagesink->flow_lock);
+GST_DEBUG ("xvimagesink pointer moved over window at %d,%d",
+pointer_x, pointer_y);
+gst_navigation_send_mouse_event (GST_NAVIGATION (xvimagesink),
+"mouse-move", 0, e.xbutton.x, e.xbutton.y);
+g_mutex_lock (xvimagesink->flow_lock);
+g_mutex_lock (xvimagesink->x_lock);
+}
+/* We get all events on our window to throw them upstream */
+while (XCheckWindowEvent (xvimagesink->xcontext->disp,
+xvimagesink->xwindow->win,
+KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask,
+&e)) {
+KeySym keysym;
+/* We lock only for the X function call */
+g_mutex_unlock (xvimagesink->x_lock);
+g_mutex_unlock (xvimagesink->flow_lock);
+switch (e.type) {
+case ButtonPress:
+/* Mouse button pressed over our window. We send upstream
+events for interactivity/navigation */
+GST_DEBUG ("xvimagesink button %d pressed over window at %d,%d",
+e.xbutton.button, e.xbutton.x, e.xbutton.y);
+gst_navigation_send_mouse_event (GST_NAVIGATION (xvimagesink),
+"mouse-button-press", e.xbutton.button, e.xbutton.x, e.xbutton.y);
+break;
+case ButtonRelease:
+/* Mouse button released over our window. We send upstream
+events for interactivity/navigation */
+GST_DEBUG ("xvimagesink button %d released over window at %d,%d",
+e.xbutton.button, e.xbutton.x, e.xbutton.y);
+gst_navigation_send_mouse_event (GST_NAVIGATION (xvimagesink),
+"mouse-button-release", e.xbutton.button, e.xbutton.x, e.xbutton.y);
+break;
+case KeyPress:
+case KeyRelease:
+/* Key pressed/released over our window. We send upstream
+events for interactivity/navigation */
+GST_DEBUG ("xvimagesink key %d pressed over window at %d,%d",
+e.xkey.keycode, e.xkey.x, e.xkey.y);
+g_mutex_lock (xvimagesink->x_lock);
+keysym = XKeycodeToKeysym (xvimagesink->xcontext->disp,
+e.xkey.keycode, 0);
+g_mutex_unlock (xvimagesink->x_lock);
+if (keysym != NoSymbol) {
+char *key_str = NULL;
+g_mutex_lock (xvimagesink->x_lock);
+key_str = XKeysymToString (keysym);
+g_mutex_unlock (xvimagesink->x_lock);
+gst_navigation_send_key_event (GST_NAVIGATION (xvimagesink),
+e.type == KeyPress ? "key-press" : "key-release", key_str);
+} else {
+gst_navigation_send_key_event (GST_NAVIGATION (xvimagesink),
+e.type == KeyPress ? "key-press" : "key-release", "unknown");
+}
+break;
+default:
+GST_DEBUG ("xvimagesink unhandled X event (%d)", e.type);
+}
+g_mutex_lock (xvimagesink->flow_lock);
+g_mutex_lock (xvimagesink->x_lock);
+}
+/* Handle Expose */
+while (XCheckWindowEvent (xvimagesink->xcontext->disp,
+xvimagesink->xwindow->win, ExposureMask | StructureNotifyMask, &e)) {
+switch (e.type) {
+case Expose:
+exposed = TRUE;
+break;
+case ConfigureNotify:
+configured = TRUE;
+break;
+default:
+break;
+}
+}
+if (xvimagesink->handle_expose && (exposed || configured)) {
+g_mutex_unlock (xvimagesink->x_lock);
+g_mutex_unlock (xvimagesink->flow_lock);
+gst_xvimagesink_expose (GST_X_OVERLAY (xvimagesink));
+g_mutex_lock (xvimagesink->flow_lock);
+g_mutex_lock (xvimagesink->x_lock);
+}
+/* Handle Display events */
+while (XPending (xvimagesink->xcontext->disp)) {
+XNextEvent (xvimagesink->xcontext->disp, &e);
+switch (e.type) {
+case ClientMessage:{
+Atom wm_delete;
+wm_delete = XInternAtom (xvimagesink->xcontext->disp,
+"WM_DELETE_WINDOW", True);
+if (wm_delete != None && wm_delete == (Atom) e.xclient.data.l[0]) {
+/* Handle window deletion by posting an error on the bus */
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, NOT_FOUND,
+("Output window was closed"), (NULL));
+g_mutex_unlock (xvimagesink->x_lock);
+gst_xvimagesink_xwindow_destroy (xvimagesink, xvimagesink->xwindow);
+xvimagesink->xwindow = NULL;
+g_mutex_lock (xvimagesink->x_lock);
+}
+break;
+}
+default:
+break;
+}
+}
+g_mutex_unlock (xvimagesink->x_lock);
+g_mutex_unlock (xvimagesink->flow_lock);
+}
+static void
+gst_lookup_xv_port_from_adaptor (GstXContext * xcontext,
+XvAdaptorInfo * adaptors, int adaptor_no)
+{
+gint j;
+/* Do we support XvImageMask ? */
+if (!(adaptors[adaptor_no].type & XvImageMask))
+return;
+/* We found such an adaptor, looking for an available port */
+for (j = 0; j < adaptors[adaptor_no].num_ports && !xcontext->xv_port_id; j++) {
+/* We try to grab the port */
+if (Success == XvGrabPort (xcontext->disp, adaptors[adaptor_no].base_id + j,
+0)) {
+xcontext->xv_port_id = adaptors[adaptor_no].base_id + j;
+GST_DEBUG ("XV Adaptor %s with %ld ports", adaptors[adaptor_no].name,
+adaptors[adaptor_no].num_ports);
+}
+}
+}
+/* This function generates a caps with all supported format by the first
+Xv grabable port we find. We store each one of the supported formats in a
+format list and append the format to a newly created caps that we return
+If this function does not return NULL because of an error, it also grabs
+the port via XvGrabPort */
+static GstCaps *
+gst_xvimagesink_get_xv_support (GstXvImageSink * xvimagesink,
+GstXContext * xcontext)
+{
+gint i;
+XvAdaptorInfo *adaptors;
+gint nb_formats;
+XvImageFormatValues *formats = NULL;
+guint nb_encodings;
+XvEncodingInfo *encodings = NULL;
+gulong max_w = G_MAXINT, max_h = G_MAXINT;
+GstCaps *caps = NULL;
+GstCaps *rgb_caps = NULL;
+g_return_val_if_fail (xcontext != NULL, NULL);
+/* First let's check that XVideo extension is available */
+if (!XQueryExtension (xcontext->disp, "XVideo", &i, &i, &i)) {
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, SETTINGS,
+("Could not initialise Xv output"),
+("XVideo extension is not available"));
+return NULL;
+}
+/* Then we get adaptors list */
+if (Success != XvQueryAdaptors (xcontext->disp, xcontext->root,
+&xcontext->nb_adaptors, &adaptors)) {
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, SETTINGS,
+("Could not initialise Xv output"),
+("Failed getting XV adaptors list"));
+return NULL;
+}
+xcontext->xv_port_id = 0;
+GST_DEBUG ("Found %u XV adaptor(s)", xcontext->nb_adaptors);
+xcontext->adaptors =
+(gchar **) g_malloc0 (xcontext->nb_adaptors * sizeof (gchar *));
+/* Now fill up our adaptor name array */
+for (i = 0; i < xcontext->nb_adaptors; i++) {
+xcontext->adaptors[i] = g_strdup (adaptors[i].name);
+}
+if (xvimagesink->adaptor_no >= 0 &&
+xvimagesink->adaptor_no < xcontext->nb_adaptors) {
+/* Find xv port from user defined adaptor */
+gst_lookup_xv_port_from_adaptor (xcontext, adaptors,
+xvimagesink->adaptor_no);
+}
+if (!xcontext->xv_port_id) {
+/* Now search for an adaptor that supports XvImageMask */
+for (i = 0; i < xcontext->nb_adaptors && !xcontext->xv_port_id; i++) {
+gst_lookup_xv_port_from_adaptor (xcontext, adaptors, i);
+xvimagesink->adaptor_no = i;
+}
+}
+XvFreeAdaptorInfo (adaptors);
+if (!xcontext->xv_port_id) {
+xvimagesink->adaptor_no = -1;
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, BUSY,
+("Could not initialise Xv output"), ("No port available"));
+return NULL;
+}
+/* Set XV_AUTOPAINT_COLORKEY and XV_DOUBLE_BUFFER and XV_COLORKEY */
+{
+int count;
+XvAttribute *const attr = XvQueryPortAttributes (xcontext->disp,
+xcontext->xv_port_id, &count);
+static const char autopaint[] = "XV_AUTOPAINT_COLORKEY";
+static const char dbl_buffer[] = "XV_DOUBLE_BUFFER";
+static const char colorkey[] = "XV_COLORKEY";
+for (i = 0; i < count; i++)
+if (!strcmp (attr[i].name, autopaint)) {
+const Atom atom = XInternAtom (xcontext->disp, autopaint, False);
+XvSetPortAttribute (xcontext->disp, xcontext->xv_port_id, atom, 1);
+break;
+}
+for (i = 0; i < count; i++)
+if (!strcmp (attr[i].name, dbl_buffer)) {
+const Atom atom = XInternAtom (xcontext->disp, dbl_buffer, False);
+XvSetPortAttribute (xcontext->disp, xcontext->xv_port_id, atom,
+(xvimagesink->double_buffer ? 1 : 0));
+break;
+}
+/* Set the colorkey to something that is dark but hopefully won't randomly
+* appear on the screen elsewhere (ie not black or greys) */
+for (i = 0; i < count; i++)
+if (!strcmp (attr[i].name, colorkey)) {
+const Atom atom = XInternAtom (xcontext->disp, colorkey, False);
+guint32 ckey;
+guint32 keymask;
+gint bits;
+gboolean set_attr = TRUE;
+/* Count the bits in the colorkey mask 'max' value */
+bits = 0;
+for (keymask = (guint32) (attr[i].max_value);
+keymask != 0; keymask >>= 1)
+bits++;
+/* set a colorkey in the right format RGB565/RGB888
+* note that the colorkey is independent from the display
+* depth (xcontext->depth). We only handle these 2 cases, because
+* they're the only types of devices we've encountered. If we don't
+* recognise it, leave it alone  */
+if (bits == 16)
+ckey = (1 << 10) | (2 << 5) | 3;
+else if (bits == 24 || bits == 32)
+ckey = (1 << 16) | (2 << 8) | 3;
+else
+set_attr = FALSE;
+if (set_attr) {
+ckey = CLAMP (ckey, (guint32) attr[i].min_value,
+(guint32) attr[i].max_value);
+GST_LOG_OBJECT (xvimagesink,
+"Setting color key for display depth %d to 0x%x",
+xcontext->depth, ckey);
+XvSetPortAttribute (xcontext->disp, xcontext->xv_port_id, atom,
+(gint) ckey);
+} else {
+GST_LOG_OBJECT (xvimagesink,
+"Unknown bit depth for Xv Colorkey - not adjusting ");
+}
+break;
+}
+XFree (attr);
+}
+/* Get the list of encodings supported by the adapter and look for the
+* XV_IMAGE encoding so we can determine the maximum width and height
+* supported */
+XvQueryEncodings (xcontext->disp, xcontext->xv_port_id, &nb_encodings,
+&encodings);
+for (i = 0; i < nb_encodings; i++) {
+GST_LOG_OBJECT (xvimagesink,
+"Encoding %d, name %s, max wxh %lux%lu rate %d/%d",
+i, encodings[i].name, encodings[i].width, encodings[i].height,
+encodings[i].rate.numerator, encodings[i].rate.denominator);
+if (strcmp (encodings[i].name, "XV_IMAGE") == 0) {
+max_w = encodings[i].width;
+max_h = encodings[i].height;
+}
+}
+XvFreeEncodingInfo (encodings);
+/* We get all image formats supported by our port */
+formats = XvListImageFormats (xcontext->disp,
+xcontext->xv_port_id, &nb_formats);
+caps = gst_caps_new_empty ();
+for (i = 0; i < nb_formats; i++) {
+GstCaps *format_caps = NULL;
+gboolean is_rgb_format = FALSE;
+/* We set the image format of the xcontext to an existing one. This
+is just some valid image format for making our xshm calls check before
+caps negotiation really happens. */
+xcontext->im_format = formats[i].id;
+switch (formats[i].type) {
+case XvRGB:
+{
+XvImageFormatValues *fmt = &(formats[i]);
+gint endianness = G_BIG_ENDIAN;
+if (fmt->byte_order == LSBFirst) {
+/* our caps system handles 24/32bpp RGB as big-endian. */
+if (fmt->bits_per_pixel == 24 || fmt->bits_per_pixel == 32) {
+fmt->red_mask = GUINT32_TO_BE (fmt->red_mask);
+fmt->green_mask = GUINT32_TO_BE (fmt->green_mask);
+fmt->blue_mask = GUINT32_TO_BE (fmt->blue_mask);
+if (fmt->bits_per_pixel == 24) {
+fmt->red_mask >>= 8;
+fmt->green_mask >>= 8;
+fmt->blue_mask >>= 8;
+}
+} else
+endianness = G_LITTLE_ENDIAN;
+}
+format_caps = gst_caps_new_simple ("video/x-raw-rgb",
+"endianness", G_TYPE_INT, endianness,
+"depth", G_TYPE_INT, fmt->depth,
+"bpp", G_TYPE_INT, fmt->bits_per_pixel,
+"red_mask", G_TYPE_INT, fmt->red_mask,
+"green_mask", G_TYPE_INT, fmt->green_mask,
+"blue_mask", G_TYPE_INT, fmt->blue_mask,
+"width", GST_TYPE_INT_RANGE, 1, max_w,
+"height", GST_TYPE_INT_RANGE, 1, max_h,
+"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
+is_rgb_format = TRUE;
+break;
+}
+case XvYUV:
+format_caps = gst_caps_new_simple ("video/x-raw-yuv",
+"format", GST_TYPE_FOURCC, formats[i].id,
+"width", GST_TYPE_INT_RANGE, 1, max_w,
+"height", GST_TYPE_INT_RANGE, 1, max_h,
+"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
+break;
+default:
+g_assert_not_reached ();
+break;
+}
+if (format_caps) {
+GstXvImageFormat *format = NULL;
+format = g_new0 (GstXvImageFormat, 1);
+if (format) {
+format->format = formats[i].id;
+format->caps = gst_caps_copy (format_caps);
+xcontext->formats_list = g_list_append (xcontext->formats_list, format);
+}
+if (is_rgb_format) {
+if (rgb_caps == NULL)
+rgb_caps = format_caps;
+else
+gst_caps_append (rgb_caps, format_caps);
+} else
+gst_caps_append (caps, format_caps);
+}
+}
+/* Collected all caps into either the caps or rgb_caps structures.
+* Append rgb_caps on the end of YUV, so that YUV is always preferred */
+if (rgb_caps)
+gst_caps_append (caps, rgb_caps);
+if (formats)
+XFree (formats);
+GST_DEBUG ("Generated the following caps: %" GST_PTR_FORMAT, caps);
+if (gst_caps_is_empty (caps)) {
+gst_caps_unref (caps);
+XvUngrabPort (xcontext->disp, xcontext->xv_port_id, 0);
+GST_ELEMENT_ERROR (xvimagesink, STREAM, WRONG_TYPE, (NULL),
+("No supported format found"));
+return NULL;
+}
+return caps;
+}
+static gpointer
+gst_xvimagesink_event_thread (GstXvImageSink * xvimagesink)
+{
+g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), NULL);
+GST_OBJECT_LOCK (xvimagesink);
+while (xvimagesink->running) {
+GST_OBJECT_UNLOCK (xvimagesink);
+if (xvimagesink->xwindow) {
+gst_xvimagesink_handle_xevents (xvimagesink);
+}
+g_usleep (50000);
+GST_OBJECT_LOCK (xvimagesink);
+}
+GST_OBJECT_UNLOCK (xvimagesink);
+return NULL;
+}
+/* This function calculates the pixel aspect ratio based on the properties
+* in the xcontext structure and stores it there. */
+static void
+gst_xvimagesink_calculate_pixel_aspect_ratio (GstXContext * xcontext)
+{
+static const gint par[][2] = {
+{1, 1},                     /* regular screen */
+{16, 15},                   /* PAL TV */
+{11, 10},                   /* 525 line Rec.601 video */
+{54, 59},                   /* 625 line Rec.601 video */
+{64, 45},                   /* 1280x1024 on 16:9 display */
+{5, 3},                     /* 1280x1024 on 4:3 display */
+{4, 3}                      /*  800x600 on 16:9 display */
+};
+gint i;
+gint index;
+gdouble ratio;
+gdouble delta;
+#define DELTA(idx) (ABS (ratio - ((gdouble) par[idx][0] / par[idx][1])))
+/* first calculate the "real" ratio based on the X values;
+* which is the "physical" w/h divided by the w/h in pixels of the display */
+ratio = (gdouble) (xcontext->widthmm * xcontext->height)
+/ (xcontext->heightmm * xcontext->width);
+/* DirectFB's X in 720x576 reports the physical dimensions wrong, so
+* override here */
+if (xcontext->width == 720 && xcontext->height == 576) {
+ratio = 4.0 * 576 / (3.0 * 720);
+}
+GST_DEBUG ("calculated pixel aspect ratio: %f", ratio);
+/* now find the one from par[][2] with the lowest delta to the real one */
+delta = DELTA (0);
+index = 0;
+for (i = 1; i < sizeof (par) / (sizeof (gint) * 2); ++i) {
+gdouble this_delta = DELTA (i);
+if (this_delta < delta) {
+index = i;
+delta = this_delta;
+}
+}
+GST_DEBUG ("Decided on index %d (%d/%d)", index,
+par[index][0], par[index][1]);
+g_free (xcontext->par);
+xcontext->par = g_new0 (GValue, 1);
+g_value_init (xcontext->par, GST_TYPE_FRACTION);
+gst_value_set_fraction (xcontext->par, par[index][0], par[index][1]);
+GST_DEBUG ("set xcontext PAR to %d/%d",
+gst_value_get_fraction_numerator (xcontext->par),
+gst_value_get_fraction_denominator (xcontext->par));
+}
+/* This function gets the X Display and global info about it. Everything is
+stored in our object and will be cleaned when the object is disposed. Note
+here that caps for supported format are generated without any window or
+image creation */
+static GstXContext *
+gst_xvimagesink_xcontext_get (GstXvImageSink * xvimagesink)
+{
+GstXContext *xcontext = NULL;
+XPixmapFormatValues *px_formats = NULL;
+gint nb_formats = 0, i, j, N_attr;
+XvAttribute *xv_attr;
+Atom prop_atom;
+char *channels[4] = { "XV_HUE", "XV_SATURATION",
+"XV_BRIGHTNESS", "XV_CONTRAST"
+};
+g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), NULL);
+xcontext = g_new0 (GstXContext, 1);
+xcontext->im_format = 0;
+g_mutex_lock (xvimagesink->x_lock);
+xcontext->disp = XOpenDisplay (xvimagesink->display_name);
+if (!xcontext->disp) {
+g_mutex_unlock (xvimagesink->x_lock);
+g_free (xcontext);
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
+("Could not initialise Xv output"), ("Could not open display"));
+return NULL;
+}
+xcontext->screen = DefaultScreenOfDisplay (xcontext->disp);
+xcontext->screen_num = DefaultScreen (xcontext->disp);
+xcontext->visual = DefaultVisual (xcontext->disp, xcontext->screen_num);
+xcontext->root = DefaultRootWindow (xcontext->disp);
+xcontext->white = XWhitePixel (xcontext->disp, xcontext->screen_num);
+xcontext->black = XBlackPixel (xcontext->disp, xcontext->screen_num);
+xcontext->depth = DefaultDepthOfScreen (xcontext->screen);
+xcontext->width = DisplayWidth (xcontext->disp, xcontext->screen_num);
+xcontext->height = DisplayHeight (xcontext->disp, xcontext->screen_num);
+xcontext->widthmm = DisplayWidthMM (xcontext->disp, xcontext->screen_num);
+xcontext->heightmm = DisplayHeightMM (xcontext->disp, xcontext->screen_num);
+GST_DEBUG_OBJECT (xvimagesink, "X reports %dx%d pixels and %d mm x %d mm",
+xcontext->width, xcontext->height, xcontext->widthmm, xcontext->heightmm);
+gst_xvimagesink_calculate_pixel_aspect_ratio (xcontext);
+/* We get supported pixmap formats at supported depth */
+px_formats = XListPixmapFormats (xcontext->disp, &nb_formats);
+if (!px_formats) {
+XCloseDisplay (xcontext->disp);
+g_mutex_unlock (xvimagesink->x_lock);
+g_free (xcontext->par);
+g_free (xcontext);
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, SETTINGS,
+("Could not initialise Xv output"), ("Could not get pixel formats"));
+return NULL;
+}
+/* We get bpp value corresponding to our running depth */
+for (i = 0; i < nb_formats; i++) {
+if (px_formats[i].depth == xcontext->depth)
+xcontext->bpp = px_formats[i].bits_per_pixel;
+}
+XFree (px_formats);
+xcontext->endianness =
+(ImageByteOrder (xcontext->disp) ==
+LSBFirst) ? G_LITTLE_ENDIAN : G_BIG_ENDIAN;
+/* our caps system handles 24/32bpp RGB as big-endian. */
+if ((xcontext->bpp == 24 || xcontext->bpp == 32) &&
+xcontext->endianness == G_LITTLE_ENDIAN) {
+xcontext->endianness = G_BIG_ENDIAN;
+xcontext->visual->red_mask = GUINT32_TO_BE (xcontext->visual->red_mask);
+xcontext->visual->green_mask = GUINT32_TO_BE (xcontext->visual->green_mask);
+xcontext->visual->blue_mask = GUINT32_TO_BE (xcontext->visual->blue_mask);
+if (xcontext->bpp == 24) {
+xcontext->visual->red_mask >>= 8;
+xcontext->visual->green_mask >>= 8;
+xcontext->visual->blue_mask >>= 8;
+}
+}
+xcontext->caps = gst_xvimagesink_get_xv_support (xvimagesink, xcontext);
+if (!xcontext->caps) {
+XCloseDisplay (xcontext->disp);
+g_mutex_unlock (xvimagesink->x_lock);
+g_free (xcontext->par);
+g_free (xcontext);
+/* GST_ELEMENT_ERROR is thrown by gst_xvimagesink_get_xv_support */
+return NULL;
+}
+#ifdef HAVE_XSHM
+/* Search for XShm extension support */
+if (XShmQueryExtension (xcontext->disp) &&
+gst_xvimagesink_check_xshm_calls (xcontext)) {
+xcontext->use_xshm = TRUE;
+GST_DEBUG ("xvimagesink is using XShm extension");
+} else
+#endif /* HAVE_XSHM */
+{
+xcontext->use_xshm = FALSE;
+GST_DEBUG ("xvimagesink is not using XShm extension");
+}
+xv_attr = XvQueryPortAttributes (xcontext->disp,
+xcontext->xv_port_id, &N_attr);
+/* Generate the channels list */
+for (i = 0; i < (sizeof (channels) / sizeof (char *)); i++) {
+XvAttribute *matching_attr = NULL;
+/* Retrieve the property atom if it exists. If it doesn't exist,
+* the attribute itself must not either, so we can skip */
+prop_atom = XInternAtom (xcontext->disp, channels[i], True);
+if (prop_atom == None)
+continue;
+if (xv_attr != NULL) {
+for (j = 0; j < N_attr && matching_attr == NULL; ++j)
+if (!g_ascii_strcasecmp (channels[i], xv_attr[j].name))
+matching_attr = xv_attr + j;
+}
+if (matching_attr) {
+GstColorBalanceChannel *channel;
+channel = g_object_new (GST_TYPE_COLOR_BALANCE_CHANNEL, NULL);
+channel->label = g_strdup (channels[i]);
+channel->min_value = matching_attr ? matching_attr->min_value : -1000;
+channel->max_value = matching_attr ? matching_attr->max_value : 1000;
+xcontext->channels_list = g_list_append (xcontext->channels_list,
+channel);
+/* If the colorbalance settings have not been touched we get Xv values
+as defaults and update our internal variables */
+if (!xvimagesink->cb_changed) {
+gint val;
+XvGetPortAttribute (xcontext->disp, xcontext->xv_port_id,
+prop_atom, &val);
+/* Normalize val to [-1000, 1000] */
+val = -1000 + 2000 * (val - channel->min_value) /
+(channel->max_value - channel->min_value);
+if (!g_ascii_strcasecmp (channels[i], "XV_HUE"))
+xvimagesink->hue = val;
+else if (!g_ascii_strcasecmp (channels[i], "XV_SATURATION"))
+xvimagesink->saturation = val;
+else if (!g_ascii_strcasecmp (channels[i], "XV_BRIGHTNESS"))
+xvimagesink->brightness = val;
+else if (!g_ascii_strcasecmp (channels[i], "XV_CONTRAST"))
+xvimagesink->contrast = val;
+}
+}
+}
+if (xv_attr)
+XFree (xv_attr);
+g_mutex_unlock (xvimagesink->x_lock);
+/* Setup our event listening thread */
+GST_OBJECT_LOCK (xvimagesink);
+xvimagesink->running = TRUE;
+xvimagesink->event_thread = g_thread_create (
+(GThreadFunc) gst_xvimagesink_event_thread, xvimagesink, TRUE, NULL);
+GST_OBJECT_UNLOCK (xvimagesink);
+return xcontext;
+}
+/* This function cleans the X context. Closing the Display, releasing the XV
+port and unrefing the caps for supported formats. */
+static void
+gst_xvimagesink_xcontext_clear (GstXvImageSink * xvimagesink)
+{
+GList *formats_list, *channels_list;
+GstXContext *xcontext;
+gint i = 0;
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+GST_OBJECT_LOCK (xvimagesink);
+if (xvimagesink->xcontext == NULL) {
+GST_OBJECT_UNLOCK (xvimagesink);
+return;
+}
+/* Take the XContext from the sink and clean it up */
+xcontext = xvimagesink->xcontext;
+xvimagesink->xcontext = NULL;
+GST_OBJECT_UNLOCK (xvimagesink);
+formats_list = xcontext->formats_list;
+while (formats_list) {
+GstXvImageFormat *format = formats_list->data;
+gst_caps_unref (format->caps);
+g_free (format);
+formats_list = g_list_next (formats_list);
+}
+if (xcontext->formats_list)
+g_list_free (xcontext->formats_list);
+channels_list = xcontext->channels_list;
+while (channels_list) {
+GstColorBalanceChannel *channel = channels_list->data;
+g_object_unref (channel);
+channels_list = g_list_next (channels_list);
+}
+if (xcontext->channels_list)
+g_list_free (xcontext->channels_list);
+gst_caps_unref (xcontext->caps);
+if (xcontext->last_caps)
+gst_caps_replace (&xcontext->last_caps, NULL);
+for (i = 0; i < xcontext->nb_adaptors; i++) {
+g_free (xcontext->adaptors[i]);
+}
+g_free (xcontext->adaptors);
+g_free (xcontext->par);
+g_mutex_lock (xvimagesink->x_lock);
+GST_DEBUG_OBJECT (xvimagesink, "Closing display and freeing X Context");
+XvUngrabPort (xcontext->disp, xcontext->xv_port_id, 0);
+XCloseDisplay (xcontext->disp);
+g_mutex_unlock (xvimagesink->x_lock);
+g_free (xcontext);
+}
+static void
+gst_xvimagesink_imagepool_clear (GstXvImageSink * xvimagesink)
+{
+g_mutex_lock (xvimagesink->pool_lock);
+while (xvimagesink->image_pool) {
+GstXvImageBuffer *xvimage = xvimagesink->image_pool->data;
+xvimagesink->image_pool = g_slist_delete_link (xvimagesink->image_pool,
+xvimagesink->image_pool);
+gst_xvimage_buffer_free (xvimage);
+}
+g_mutex_unlock (xvimagesink->pool_lock);
+}
+/* Element stuff */
+/* This function tries to get a format matching with a given caps in the
+supported list of formats we generated in gst_xvimagesink_get_xv_support */
+static gint
+gst_xvimagesink_get_format_from_caps (GstXvImageSink * xvimagesink,
+GstCaps * caps)
+{
+GList *list = NULL;
+g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), 0);
+list = xvimagesink->xcontext->formats_list;
+while (list) {
+GstXvImageFormat *format = list->data;
+if (format) {
+GstCaps *icaps = NULL;
+icaps = gst_caps_intersect (caps, format->caps);
+if (!gst_caps_is_empty (icaps)) {
+gst_caps_unref (icaps);
+return format->format;
+}
+gst_caps_unref (icaps);
+}
+list = g_list_next (list);
+}
+return -1;
+}
+static GstCaps *
+gst_xvimagesink_getcaps (GstBaseSink * bsink)
+{
+GstXvImageSink *xvimagesink;
+xvimagesink = GST_XVIMAGESINK (bsink);
+if (xvimagesink->xcontext)
+return gst_caps_ref (xvimagesink->xcontext->caps);
+return
+gst_caps_copy (gst_pad_get_pad_template_caps (GST_VIDEO_SINK_PAD
+(xvimagesink)));
+}
+static gboolean
+gst_xvimagesink_setcaps (GstBaseSink * bsink, GstCaps * caps)
+{
+GstXvImageSink *xvimagesink;
+GstStructure *structure;
+GstCaps *intersection;
+guint32 im_format = 0;
+gboolean ret;
+gint video_width, video_height;
+gint video_par_n, video_par_d;        /* video's PAR */
+gint display_par_n, display_par_d;    /* display's PAR */
+const GValue *caps_par;
+const GValue *fps;
+guint num, den;
+xvimagesink = GST_XVIMAGESINK (bsink);
+GST_DEBUG_OBJECT (xvimagesink,
+"In setcaps. Possible caps %" GST_PTR_FORMAT ", setting caps %"
+GST_PTR_FORMAT, xvimagesink->xcontext->caps, caps);
+intersection = gst_caps_intersect (xvimagesink->xcontext->caps, caps);
+GST_DEBUG_OBJECT (xvimagesink, "intersection returned %" GST_PTR_FORMAT,
+intersection);
+if (gst_caps_is_empty (intersection)) {
+gst_caps_unref (intersection);
+return FALSE;
+}
+gst_caps_unref (intersection);
+structure = gst_caps_get_structure (caps, 0);
+ret = gst_structure_get_int (structure, "width", &video_width);
+ret &= gst_structure_get_int (structure, "height", &video_height);
+fps = gst_structure_get_value (structure, "framerate");
+ret &= (fps != NULL);
+if (!ret) {
+GST_DEBUG_OBJECT (xvimagesink, "Failed to retrieve either width, "
+"height or framerate from intersected caps");
+return FALSE;
+}
+xvimagesink->fps_n = gst_value_get_fraction_numerator (fps);
+xvimagesink->fps_d = gst_value_get_fraction_denominator (fps);
+xvimagesink->video_width = video_width;
+xvimagesink->video_height = video_height;
+im_format = gst_xvimagesink_get_format_from_caps (xvimagesink, caps);
+if (im_format == -1) {
+GST_DEBUG_OBJECT (xvimagesink,
+"Could not locate image format from caps %" GST_PTR_FORMAT, caps);
+return FALSE;
+}
+/* get aspect ratio from caps if it's present, and
+* convert video width and height to a display width and height
+* using wd / hd = wv / hv * PARv / PARd */
+/* get video's PAR */
+caps_par = gst_structure_get_value (structure, "pixel-aspect-ratio");
+if (caps_par) {
+video_par_n = gst_value_get_fraction_numerator (caps_par);
+video_par_d = gst_value_get_fraction_denominator (caps_par);
+} else {
+video_par_n = 1;
+video_par_d = 1;
+}
+/* get display's PAR */
+if (xvimagesink->par) {
+display_par_n = gst_value_get_fraction_numerator (xvimagesink->par);
+display_par_d = gst_value_get_fraction_denominator (xvimagesink->par);
+} else {
+display_par_n = 1;
+display_par_d = 1;
+}
+if (!gst_video_calculate_display_ratio (&num, &den, video_width,
+video_height, video_par_n, video_par_d, display_par_n,
+display_par_d)) {
+GST_ELEMENT_ERROR (xvimagesink, CORE, NEGOTIATION, (NULL),
+("Error calculating the output display ratio of the video."));
+return FALSE;
+}
+GST_DEBUG_OBJECT (xvimagesink,
+"video width/height: %dx%d, calculated display ratio: %d/%d",
+video_width, video_height, num, den);
+/* now find a width x height that respects this display ratio.
+* prefer those that have one of w/h the same as the incoming video
+* using wd / hd = num / den */
+/* start with same height, because of interlaced video */
+/* check hd / den is an integer scale factor, and scale wd with the PAR */
+if (video_height % den == 0) {
+GST_DEBUG_OBJECT (xvimagesink, "keeping video height");
+GST_VIDEO_SINK_WIDTH (xvimagesink) = (guint)
+gst_util_uint64_scale_int (video_height, num, den);
+GST_VIDEO_SINK_HEIGHT (xvimagesink) = video_height;
+} else if (video_width % num == 0) {
+GST_DEBUG_OBJECT (xvimagesink, "keeping video width");
+GST_VIDEO_SINK_WIDTH (xvimagesink) = video_width;
+GST_VIDEO_SINK_HEIGHT (xvimagesink) = (guint)
+gst_util_uint64_scale_int (video_width, den, num);
+} else {
+GST_DEBUG_OBJECT (xvimagesink, "approximating while keeping video height");
+GST_VIDEO_SINK_WIDTH (xvimagesink) = (guint)
+gst_util_uint64_scale_int (video_height, num, den);
+GST_VIDEO_SINK_HEIGHT (xvimagesink) = video_height;
+}
+GST_DEBUG_OBJECT (xvimagesink, "scaling to %dx%d",
+GST_VIDEO_SINK_WIDTH (xvimagesink), GST_VIDEO_SINK_HEIGHT (xvimagesink));
+/* Notify application to set xwindow id now */
+g_mutex_lock (xvimagesink->flow_lock);
+if (!xvimagesink->xwindow) {
+g_mutex_unlock (xvimagesink->flow_lock);
+gst_x_overlay_prepare_xwindow_id (GST_X_OVERLAY (xvimagesink));
+} else {
+g_mutex_unlock (xvimagesink->flow_lock);
+}
+/* Creating our window and our image with the display size in pixels */
+if (GST_VIDEO_SINK_WIDTH (xvimagesink) <= 0 ||
+GST_VIDEO_SINK_HEIGHT (xvimagesink) <= 0) {
+GST_ELEMENT_ERROR (xvimagesink, CORE, NEGOTIATION, (NULL),
+("Error calculating the output display ratio of the video."));
+return FALSE;
+}
+g_mutex_lock (xvimagesink->flow_lock);
+if (!xvimagesink->xwindow) {
+xvimagesink->xwindow = gst_xvimagesink_xwindow_new (xvimagesink,
+GST_VIDEO_SINK_WIDTH (xvimagesink),
+GST_VIDEO_SINK_HEIGHT (xvimagesink));
+}
+/* After a resize, we want to redraw the borders in case the new frame size
+* doesn't cover the same area */
+xvimagesink->draw_border = TRUE;
+/* We renew our xvimage only if size or format changed;
+* the xvimage is the same size as the video pixel size */
+if ((xvimagesink->xvimage) &&
+((im_format != xvimagesink->xvimage->im_format) ||
+(video_width != xvimagesink->xvimage->width) ||
+(video_height != xvimagesink->xvimage->height))) {
+GST_DEBUG_OBJECT (xvimagesink,
+"old format %" GST_FOURCC_FORMAT ", new format %" GST_FOURCC_FORMAT,
+GST_FOURCC_ARGS (xvimagesink->xvimage->im_format),
+GST_FOURCC_ARGS (im_format));
+GST_DEBUG_OBJECT (xvimagesink, "renewing xvimage");
+gst_buffer_unref (GST_BUFFER (xvimagesink->xvimage));
+xvimagesink->xvimage = NULL;
+}
+g_mutex_unlock (xvimagesink->flow_lock);
+return TRUE;
+}
+static GstStateChangeReturn
+gst_xvimagesink_change_state (GstElement * element, GstStateChange transition)
+{
+GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
+GstXvImageSink *xvimagesink;
+GstXContext *xcontext = NULL;
+xvimagesink = GST_XVIMAGESINK (element);
+switch (transition) {
+case GST_STATE_CHANGE_NULL_TO_READY:
+/* Initializing the XContext */
+if (xvimagesink->xcontext == NULL) {
+xcontext = gst_xvimagesink_xcontext_get (xvimagesink);
+if (xcontext == NULL)
+return GST_STATE_CHANGE_FAILURE;
+GST_OBJECT_LOCK (xvimagesink);
+if (xcontext)
+xvimagesink->xcontext = xcontext;
+GST_OBJECT_UNLOCK (xvimagesink);
+}
+/* update object's par with calculated one if not set yet */
+if (!xvimagesink->par) {
+xvimagesink->par = g_new0 (GValue, 1);
+gst_value_init_and_copy (xvimagesink->par, xvimagesink->xcontext->par);
+GST_DEBUG_OBJECT (xvimagesink, "set calculated PAR on object's PAR");
+}
+/* call XSynchronize with the current value of synchronous */
+GST_DEBUG_OBJECT (xvimagesink, "XSynchronize called with %s",
+xvimagesink->synchronous ? "TRUE" : "FALSE");
+XSynchronize (xvimagesink->xcontext->disp, xvimagesink->synchronous);
+gst_xvimagesink_update_colorbalance (xvimagesink);
+break;
+case GST_STATE_CHANGE_READY_TO_PAUSED:
+g_mutex_lock (xvimagesink->flow_lock);
+if (xvimagesink->xwindow)
+gst_xvimagesink_xwindow_clear (xvimagesink, xvimagesink->xwindow);
+g_mutex_unlock (xvimagesink->flow_lock);
+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:
+xvimagesink->fps_n = 0;
+xvimagesink->fps_d = 1;
+GST_VIDEO_SINK_WIDTH (xvimagesink) = 0;
+GST_VIDEO_SINK_HEIGHT (xvimagesink) = 0;
+break;
+case GST_STATE_CHANGE_READY_TO_NULL:
+gst_xvimagesink_reset (xvimagesink);
+break;
+default:
+break;
+}
+return ret;
+}
+static void
+gst_xvimagesink_get_times (GstBaseSink * bsink, GstBuffer * buf,
+GstClockTime * start, GstClockTime * end)
+{
+GstXvImageSink *xvimagesink;
+xvimagesink = GST_XVIMAGESINK (bsink);
+if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
+*start = GST_BUFFER_TIMESTAMP (buf);
+if (GST_BUFFER_DURATION_IS_VALID (buf)) {
+*end = *start + GST_BUFFER_DURATION (buf);
+} else {
+if (xvimagesink->fps_n > 0) {
+*end = *start +
+gst_util_uint64_scale_int (GST_SECOND, xvimagesink->fps_d,
+xvimagesink->fps_n);
+}
+}
+}
+}
+static GstFlowReturn
+gst_xvimagesink_show_frame (GstBaseSink * bsink, GstBuffer * buf)
+{
+GstXvImageSink *xvimagesink;
+xvimagesink = GST_XVIMAGESINK (bsink);
+/* If this buffer has been allocated using our buffer management we simply
+put the ximage which is in the PRIVATE pointer */
+if (GST_IS_XVIMAGE_BUFFER (buf)) {
+GST_LOG_OBJECT (xvimagesink, "fast put of bufferpool buffer");
+if (!gst_xvimagesink_xvimage_put (xvimagesink, GST_XVIMAGE_BUFFER (buf)))
+goto no_window;
+} else {
+GST_LOG_OBJECT (xvimagesink, "slow copy into bufferpool buffer");
+/* Else we have to copy the data into our private image, */
+/* if we have one... */
+if (!xvimagesink->xvimage) {
+GST_DEBUG_OBJECT (xvimagesink, "creating our xvimage");
+xvimagesink->xvimage = gst_xvimagesink_xvimage_new (xvimagesink,
+GST_BUFFER_CAPS (buf));
+if (!xvimagesink->xvimage)
+/* The create method should have posted an informative error */
+goto no_image;
+if (xvimagesink->xvimage->size < GST_BUFFER_SIZE (buf)) {
+GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
+("Failed to create output image buffer of %dx%d pixels",
+xvimagesink->xvimage->width, xvimagesink->xvimage->height),
+("XServer allocated buffer size did not match input buffer"));
+gst_xvimage_buffer_destroy (xvimagesink->xvimage);
+xvimagesink->xvimage = NULL;
+goto no_image;
+}
+}
+memcpy (xvimagesink->xvimage->xvimage->data,
+GST_BUFFER_DATA (buf),
+MIN (GST_BUFFER_SIZE (buf), xvimagesink->xvimage->size));
+if (!gst_xvimagesink_xvimage_put (xvimagesink, xvimagesink->xvimage))
+goto no_window;
+}
+return GST_FLOW_OK;
+/* ERRORS */
+no_image:
+{
+/* No image available. That's very bad ! */
+GST_WARNING_OBJECT (xvimagesink, "could not create image");
+return GST_FLOW_ERROR;
+}
+no_window:
+{
+/* No Window available to put our image into */
+GST_WARNING_OBJECT (xvimagesink, "could not output image - no window");
+return GST_FLOW_ERROR;
+}
+}
+/* Buffer management */
+static GstFlowReturn
+gst_xvimagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
+GstCaps * caps, GstBuffer ** buf)
+{
+GstFlowReturn ret = GST_FLOW_OK;
+GstXvImageSink *xvimagesink;
+GstXvImageBuffer *xvimage = NULL;
+GstCaps *intersection = NULL;
+GstStructure *structure = NULL;
+gint width, height, image_format;
+xvimagesink = GST_XVIMAGESINK (bsink);
+if (G_LIKELY (xvimagesink->xcontext->last_caps &&
+gst_caps_is_equal (caps, xvimagesink->xcontext->last_caps))) {
+GST_DEBUG_OBJECT (xvimagesink,
+"buffer alloc for same last_caps, reusing caps");
+intersection = gst_caps_ref (caps);
+image_format = xvimagesink->xcontext->last_format;
+goto reuse_last_caps;
+}
+GST_DEBUG_OBJECT (xvimagesink, "buffer alloc requested with caps %"
+GST_PTR_FORMAT ", intersecting with our caps %" GST_PTR_FORMAT, caps,
+xvimagesink->xcontext->caps);
+/* Check the caps against our xcontext */
+intersection = gst_caps_intersect (xvimagesink->xcontext->caps, caps);
+/* Ensure the returned caps are fixed */
+gst_caps_truncate (intersection);
+GST_DEBUG_OBJECT (xvimagesink, "intersection in buffer alloc returned %"
+GST_PTR_FORMAT, intersection);
+if (gst_caps_is_empty (intersection)) {
+/* So we don't support this kind of buffer, let's define one we'd like */
+GstCaps *new_caps = gst_caps_copy (caps);
+structure = gst_caps_get_structure (new_caps, 0);
+/* Try with YUV first */
+gst_structure_set_name (structure, "video/x-raw-yuv");
+gst_structure_remove_field (structure, "format");
+gst_structure_remove_field (structure, "endianness");
+gst_structure_remove_field (structure, "depth");
+gst_structure_remove_field (structure, "bpp");
+gst_structure_remove_field (structure, "red_mask");
+gst_structure_remove_field (structure, "green_mask");
+gst_structure_remove_field (structure, "blue_mask");
+gst_structure_remove_field (structure, "alpha_mask");
+/* Reuse intersection with Xcontext */
+gst_caps_unref (intersection);
+intersection = gst_caps_intersect (xvimagesink->xcontext->caps, new_caps);
+if (gst_caps_is_empty (intersection)) {
+/* Now try with RGB */
+gst_structure_set_name (structure, "video/x-raw-rgb");
+/* And interset again */
+gst_caps_unref (intersection);
+intersection = gst_caps_intersect (xvimagesink->xcontext->caps, new_caps);
+if (gst_caps_is_empty (intersection)) {
+GST_WARNING_OBJECT (xvimagesink, "we were requested a buffer with "
+"caps %" GST_PTR_FORMAT ", but our xcontext caps %" GST_PTR_FORMAT
+" are completely incompatible with those caps", new_caps,
+xvimagesink->xcontext->caps);
+gst_caps_unref (new_caps);
+ret = GST_FLOW_UNEXPECTED;
+goto beach;
+}
+}
+/* Clean this copy */
+gst_caps_unref (new_caps);
+/* We want fixed caps */
+gst_caps_truncate (intersection);
+GST_DEBUG_OBJECT (xvimagesink, "allocating a buffer with caps %"
+GST_PTR_FORMAT, intersection);
+} else if (gst_caps_is_equal (intersection, caps)) {
+/* Things work better if we return a buffer with the same caps ptr
+* as was asked for when we can */
+gst_caps_replace (&intersection, caps);
+}
+/* Get image format from caps */
+image_format = gst_xvimagesink_get_format_from_caps (xvimagesink,
+intersection);
+/* Store our caps and format as the last_caps to avoid expensive
+* caps intersection next time */
+gst_caps_replace (&xvimagesink->xcontext->last_caps, intersection);
+xvimagesink->xcontext->last_format = image_format;
+reuse_last_caps:
+/* Get geometry from caps */
+structure = gst_caps_get_structure (intersection, 0);
+if (!gst_structure_get_int (structure, "width", &width) ||
+!gst_structure_get_int (structure, "height", &height) ||
+image_format == -1) {
+GST_WARNING_OBJECT (xvimagesink, "invalid caps for buffer allocation %"
+GST_PTR_FORMAT, intersection);
+ret = GST_FLOW_UNEXPECTED;
+goto beach;
+}
+g_mutex_lock (xvimagesink->pool_lock);
+/* Walking through the pool cleaning unusable images and searching for a
+suitable one */
+while (xvimagesink->image_pool) {
+xvimage = xvimagesink->image_pool->data;
+if (xvimage) {
+/* Removing from the pool */
+xvimagesink->image_pool = g_slist_delete_link (xvimagesink->image_pool,
+xvimagesink->image_pool);
+/* We check for geometry or image format changes */
+if ((xvimage->width != width) ||
+(xvimage->height != height) || (xvimage->im_format != image_format)) {
+/* This image is unusable. Destroying... */
+gst_xvimage_buffer_free (xvimage);
+xvimage = NULL;
+} else {
+/* We found a suitable image */
+GST_LOG_OBJECT (xvimagesink, "found usable image in pool");
+break;
+}
+}
+}
+g_mutex_unlock (xvimagesink->pool_lock);
+if (!xvimage) {
+/* We found no suitable image in the pool. Creating... */
+GST_DEBUG_OBJECT (xvimagesink, "no usable image in pool, creating xvimage");
+xvimage = gst_xvimagesink_xvimage_new (xvimagesink, intersection);
+if (xvimage && xvimage->size < size) {
+/* This image is unusable. Destroying... */
+gst_xvimage_buffer_free (xvimage);
+xvimage = NULL;
+}
+}
+if (xvimage) {
+gst_buffer_set_caps (GST_BUFFER (xvimage), intersection);
+}
+*buf = GST_BUFFER (xvimage);
+beach:
+if (intersection) {
+gst_caps_unref (intersection);
+}
+return ret;
+}
+/* Interfaces stuff */
+static gboolean
+gst_xvimagesink_interface_supported (GstImplementsInterface * iface, GType type)
+{
+g_assert (type == GST_TYPE_NAVIGATION || type == GST_TYPE_X_OVERLAY ||
+type == GST_TYPE_COLOR_BALANCE || type == GST_TYPE_PROPERTY_PROBE);
+return TRUE;
+}
+static void
+gst_xvimagesink_interface_init (GstImplementsInterfaceClass * klass)
+{
+klass->supported = gst_xvimagesink_interface_supported;
+}
+static void
+gst_xvimagesink_navigation_send_event (GstNavigation * navigation,
+GstStructure * structure)
+{
+GstXvImageSink *xvimagesink = GST_XVIMAGESINK (navigation);
+GstPad *peer;
+if ((peer = gst_pad_get_peer (GST_VIDEO_SINK_PAD (xvimagesink)))) {
+GstEvent *event;
+GstVideoRectangle src, dst, result;
+gdouble x, y, xscale = 1.0, yscale = 1.0;
+event = gst_event_new_navigation (structure);
+/* We take the flow_lock while we look at the window */
+g_mutex_lock (xvimagesink->flow_lock);
+if (!xvimagesink->xwindow) {
+g_mutex_unlock (xvimagesink->flow_lock);
+return;
+}
+/* We get the frame position using the calculated geometry from _setcaps
+that respect pixel aspect ratios */
+src.w = GST_VIDEO_SINK_WIDTH (xvimagesink);
+src.h = GST_VIDEO_SINK_HEIGHT (xvimagesink);
+dst.w = xvimagesink->xwindow->width;
+dst.h = xvimagesink->xwindow->height;
+g_mutex_unlock (xvimagesink->flow_lock);
+if (xvimagesink->keep_aspect) {
+gst_video_sink_center_rect (src, dst, &result, TRUE);
+} else {
+result.x = result.y = 0;
+result.w = dst.w;
+result.h = dst.h;
+}
+/* We calculate scaling using the original video frames geometry to include
+pixel aspect ratio scaling. */
+xscale = (gdouble) xvimagesink->video_width / result.w;
+yscale = (gdouble) xvimagesink->video_height / result.h;
+/* Converting pointer coordinates to the non scaled geometry */
+if (gst_structure_get_double (structure, "pointer_x", &x)) {
+x = MIN (x, result.x + result.w);
+x = MAX (x - result.x, 0);
+gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE,
+(gdouble) x * xscale, NULL);
+}
+if (gst_structure_get_double (structure, "pointer_y", &y)) {
+y = MIN (y, result.y + result.h);
+y = MAX (y - result.y, 0);
+gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE,
+(gdouble) y * yscale, NULL);
+}
+gst_pad_send_event (peer, event);
+gst_object_unref (peer);
+}
+}
+static void
+gst_xvimagesink_navigation_init (GstNavigationInterface * iface)
+{
+iface->send_event = gst_xvimagesink_navigation_send_event;
+}
+static void
+gst_xvimagesink_set_xwindow_id (GstXOverlay * overlay, XID xwindow_id)
+{
+GstXvImageSink *xvimagesink = GST_XVIMAGESINK (overlay);
+GstXWindow *xwindow = NULL;
+XWindowAttributes attr;
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+g_mutex_lock (xvimagesink->flow_lock);
+/* If we already use that window return */
+if (xvimagesink->xwindow && (xwindow_id == xvimagesink->xwindow->win)) {
+g_mutex_unlock (xvimagesink->flow_lock);
+return;
+}
+/* If the element has not initialized the X11 context try to do so */
+if (!xvimagesink->xcontext &&
+!(xvimagesink->xcontext = gst_xvimagesink_xcontext_get (xvimagesink))) {
+g_mutex_unlock (xvimagesink->flow_lock);
+/* we have thrown a GST_ELEMENT_ERROR now */
+return;
+}
+gst_xvimagesink_update_colorbalance (xvimagesink);
+/* Clear image pool as the images are unusable anyway */
+gst_xvimagesink_imagepool_clear (xvimagesink);
+/* Clear the xvimage */
+if (xvimagesink->xvimage) {
+gst_xvimage_buffer_free (xvimagesink->xvimage);
+xvimagesink->xvimage = NULL;
+}
+/* If a window is there already we destroy it */
+if (xvimagesink->xwindow) {
+gst_xvimagesink_xwindow_destroy (xvimagesink, xvimagesink->xwindow);
+xvimagesink->xwindow = NULL;
+}
+/* If the xid is 0 we go back to an internal window */
+if (xwindow_id == 0) {
+/* If no width/height caps nego did not happen window will be created
+during caps nego then */
+if (GST_VIDEO_SINK_WIDTH (xvimagesink)
+&& GST_VIDEO_SINK_HEIGHT (xvimagesink)) {
+xwindow =
+gst_xvimagesink_xwindow_new (xvimagesink,
+GST_VIDEO_SINK_WIDTH (xvimagesink),
+GST_VIDEO_SINK_HEIGHT (xvimagesink));
+}
+} else {
+xwindow = g_new0 (GstXWindow, 1);
+xwindow->win = xwindow_id;
+/* We get window geometry, set the event we want to receive,
+and create a GC */
+g_mutex_lock (xvimagesink->x_lock);
+XGetWindowAttributes (xvimagesink->xcontext->disp, xwindow->win, &attr);
+xwindow->width = attr.width;
+xwindow->height = attr.height;
+xwindow->internal = FALSE;
+if (xvimagesink->handle_events) {
+XSelectInput (xvimagesink->xcontext->disp, xwindow->win, ExposureMask |
+StructureNotifyMask | PointerMotionMask | KeyPressMask |
+KeyReleaseMask);
+}
+xwindow->gc = XCreateGC (xvimagesink->xcontext->disp,
+xwindow->win, 0, NULL);
+g_mutex_unlock (xvimagesink->x_lock);
+}
+if (xwindow)
+xvimagesink->xwindow = xwindow;
+g_mutex_unlock (xvimagesink->flow_lock);
+}
+static void
+gst_xvimagesink_expose (GstXOverlay * overlay)
+{
+GstXvImageSink *xvimagesink = GST_XVIMAGESINK (overlay);
+gst_xvimagesink_xvimage_put (xvimagesink, NULL);
+}
+static void
+gst_xvimagesink_set_event_handling (GstXOverlay * overlay,
+gboolean handle_events)
+{
+GstXvImageSink *xvimagesink = GST_XVIMAGESINK (overlay);
+xvimagesink->handle_events = handle_events;
+g_mutex_lock (xvimagesink->flow_lock);
+if (G_UNLIKELY (!xvimagesink->xwindow)) {
+g_mutex_unlock (xvimagesink->flow_lock);
+return;
+}
+g_mutex_lock (xvimagesink->x_lock);
+if (handle_events) {
+if (xvimagesink->xwindow->internal) {
+XSelectInput (xvimagesink->xcontext->disp, xvimagesink->xwindow->win,
+ExposureMask | StructureNotifyMask | PointerMotionMask |
+KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask);
+} else {
+XSelectInput (xvimagesink->xcontext->disp, xvimagesink->xwindow->win,
+ExposureMask | StructureNotifyMask | PointerMotionMask |
+KeyPressMask | KeyReleaseMask);
+}
+} else {
+XSelectInput (xvimagesink->xcontext->disp, xvimagesink->xwindow->win, 0);
+}
+g_mutex_unlock (xvimagesink->x_lock);
+g_mutex_unlock (xvimagesink->flow_lock);
+}
+static void
+gst_xvimagesink_xoverlay_init (GstXOverlayClass * iface)
+{
+iface->set_xwindow_id = gst_xvimagesink_set_xwindow_id;
+iface->expose = gst_xvimagesink_expose;
+iface->handle_events = gst_xvimagesink_set_event_handling;
+}
+static const GList *
+gst_xvimagesink_colorbalance_list_channels (GstColorBalance * balance)
+{
+GstXvImageSink *xvimagesink = GST_XVIMAGESINK (balance);
+g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), NULL);
+if (xvimagesink->xcontext)
+return xvimagesink->xcontext->channels_list;
+else
+return NULL;
+}
+static void
+gst_xvimagesink_colorbalance_set_value (GstColorBalance * balance,
+GstColorBalanceChannel * channel, gint value)
+{
+GstXvImageSink *xvimagesink = GST_XVIMAGESINK (balance);
+g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
+g_return_if_fail (channel->label != NULL);
+xvimagesink->cb_changed = TRUE;
+/* Normalize val to [-1000, 1000] */
+value = -1000 + 2000 * (value - channel->min_value) /
+(channel->max_value - channel->min_value);
+if (g_ascii_strcasecmp (channel->label, "XV_HUE") == 0) {
+xvimagesink->hue = value;
+} else if (g_ascii_strcasecmp (channel->label, "XV_SATURATION") == 0) {
+xvimagesink->saturation = value;
+} else if (g_ascii_strcasecmp (channel->label, "XV_CONTRAST") == 0) {
+xvimagesink->contrast = value;
+} else if (g_ascii_strcasecmp (channel->label, "XV_BRIGHTNESS") == 0) {
+xvimagesink->brightness = value;
+} else {
+g_warning ("got an unknown channel %s", channel->label);
+return;
+}
+gst_xvimagesink_update_colorbalance (xvimagesink);
+}
+static gint
+gst_xvimagesink_colorbalance_get_value (GstColorBalance * balance,
+GstColorBalanceChannel * channel)
+{
+GstXvImageSink *xvimagesink = GST_XVIMAGESINK (balance);
+gint value = 0;
+g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), 0);
+g_return_val_if_fail (channel->label != NULL, 0);
+if (g_ascii_strcasecmp (channel->label, "XV_HUE") == 0) {
+value = xvimagesink->hue;
+} else if (g_ascii_strcasecmp (channel->label, "XV_SATURATION") == 0) {
+value = xvimagesink->saturation;
+} else if (g_ascii_strcasecmp (channel->label, "XV_CONTRAST") == 0) {
+value = xvimagesink->contrast;
+} else if (g_ascii_strcasecmp (channel->label, "XV_BRIGHTNESS") == 0) {
+value = xvimagesink->brightness;
+} else {
+g_warning ("got an unknown channel %s", channel->label);
+}
+/* Normalize val to [channel->min_value, channel->max_value] */
+value = channel->min_value + (channel->max_value - channel->min_value) *
+(value + 1000) / 2000;
+return value;
+}
+static void
+gst_xvimagesink_colorbalance_init (GstColorBalanceClass * iface)
+{
+GST_COLOR_BALANCE_TYPE (iface) = GST_COLOR_BALANCE_HARDWARE;
+iface->list_channels = gst_xvimagesink_colorbalance_list_channels;
+iface->set_value = gst_xvimagesink_colorbalance_set_value;
+iface->get_value = gst_xvimagesink_colorbalance_get_value;
+}
+static const GList *
+gst_xvimagesink_probe_get_properties (GstPropertyProbe * probe)
+{
+GObjectClass *klass = G_OBJECT_GET_CLASS (probe);
+static GList *list = NULL;
+if (!list) {
+list = g_list_append (NULL, g_object_class_find_property (klass, "device"));
+}
+return list;
+}
+static void
+gst_xvimagesink_probe_probe_property (GstPropertyProbe * probe,
+guint prop_id, const GParamSpec * pspec)
+{
+GstXvImageSink *xvimagesink = GST_XVIMAGESINK (probe);
+switch (prop_id) {
+case ARG_DEVICE:
+GST_DEBUG_OBJECT (xvimagesink, "probing device list");
+if (!xvimagesink->xcontext) {
+GST_DEBUG_OBJECT (xvimagesink, "generating xcontext");
+xvimagesink->xcontext = gst_xvimagesink_xcontext_get (xvimagesink);
+}
+break;
+default:
+G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+break;
+}
+}
+static gboolean
+gst_xvimagesink_probe_needs_probe (GstPropertyProbe * probe,
+guint prop_id, const GParamSpec * pspec)
+{
+GstXvImageSink *xvimagesink = GST_XVIMAGESINK (probe);
+gboolean ret = FALSE;
+switch (prop_id) {
+case ARG_DEVICE:
+if (xvimagesink->xcontext != NULL) {
+ret = FALSE;
+} else {
+ret = TRUE;
+}
+break;
+default:
+G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+break;
+}
+return ret;
+}
+static GValueArray *
+gst_xvimagesink_probe_get_values (GstPropertyProbe * probe,
+guint prop_id, const GParamSpec * pspec)
+{
+GstXvImageSink *xvimagesink = GST_XVIMAGESINK (probe);
+GValueArray *array = NULL;
+if (G_UNLIKELY (!xvimagesink->xcontext)) {
+GST_WARNING_OBJECT (xvimagesink, "we don't have any xcontext, can't "
+"get values");
+goto beach;
+}
+switch (prop_id) {
+case ARG_DEVICE:
+{
+guint i;
+GValue value = { 0 };
+array = g_value_array_new (xvimagesink->xcontext->nb_adaptors);
+g_value_init (&value, G_TYPE_STRING);
+for (i = 0; i < xvimagesink->xcontext->nb_adaptors; i++) {
+gchar *adaptor_id_s = g_strdup_printf ("%u", i);
+g_value_set_string (&value, adaptor_id_s);
+g_value_array_append (array, &value);
+g_free (adaptor_id_s);
+}
+g_value_unset (&value);
+break;
+}
+default:
+G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+break;
+}
+beach:
+return array;
+}
+static void
+gst_xvimagesink_property_probe_interface_init (GstPropertyProbeInterface *
+iface)
+{
+iface->get_properties = gst_xvimagesink_probe_get_properties;
+iface->probe_property = gst_xvimagesink_probe_probe_property;
+iface->needs_probe = gst_xvimagesink_probe_needs_probe;
+iface->get_values = gst_xvimagesink_probe_get_values;
+}
+/* =========================================== */
+/*                                             */
+/*              Init & Class init              */
+/*                                             */
+/* =========================================== */
+static void
+gst_xvimagesink_set_property (GObject * object, guint prop_id,
+const GValue * value, GParamSpec * pspec)
+{
+GstXvImageSink *xvimagesink;
+g_return_if_fail (GST_IS_XVIMAGESINK (object));
+xvimagesink = GST_XVIMAGESINK (object);
+switch (prop_id) {
+case ARG_HUE:
+xvimagesink->hue = g_value_get_int (value);
+xvimagesink->cb_changed = TRUE;
+gst_xvimagesink_update_colorbalance (xvimagesink);
+break;
+case ARG_CONTRAST:
+xvimagesink->contrast = g_value_get_int (value);
+xvimagesink->cb_changed = TRUE;
+gst_xvimagesink_update_colorbalance (xvimagesink);
+break;
+case ARG_BRIGHTNESS:
+xvimagesink->brightness = g_value_get_int (value);
+xvimagesink->cb_changed = TRUE;
+gst_xvimagesink_update_colorbalance (xvimagesink);
+break;
+case ARG_SATURATION:
+xvimagesink->saturation = g_value_get_int (value);
+xvimagesink->cb_changed = TRUE;
+gst_xvimagesink_update_colorbalance (xvimagesink);
+break;
+case ARG_DISPLAY:
+xvimagesink->display_name = g_strdup (g_value_get_string (value));
+break;
+case ARG_SYNCHRONOUS:
+xvimagesink->synchronous = g_value_get_boolean (value);
+if (xvimagesink->xcontext) {
+XSynchronize (xvimagesink->xcontext->disp, xvimagesink->synchronous);
+GST_DEBUG_OBJECT (xvimagesink, "XSynchronize called with %s",
+xvimagesink->synchronous ? "TRUE" : "FALSE");
+}
+break;
+case ARG_PIXEL_ASPECT_RATIO:
+g_free (xvimagesink->par);
+xvimagesink->par = g_new0 (GValue, 1);
+g_value_init (xvimagesink->par, GST_TYPE_FRACTION);
+if (!g_value_transform (value, xvimagesink->par)) {
+g_warning ("Could not transform string to aspect ratio");
+gst_value_set_fraction (xvimagesink->par, 1, 1);
+}
+GST_DEBUG_OBJECT (xvimagesink, "set PAR to %d/%d",
+gst_value_get_fraction_numerator (xvimagesink->par),
+gst_value_get_fraction_denominator (xvimagesink->par));
+break;
+case ARG_FORCE_ASPECT_RATIO:
+xvimagesink->keep_aspect = g_value_get_boolean (value);
+break;
+case ARG_HANDLE_EVENTS:
+gst_xvimagesink_set_event_handling (GST_X_OVERLAY (xvimagesink),
+g_value_get_boolean (value));
+break;
+case ARG_DEVICE:
+xvimagesink->adaptor_no = atoi (g_value_get_string (value));
+break;
+case ARG_HANDLE_EXPOSE:
+xvimagesink->handle_expose = g_value_get_boolean (value);
+break;
+case ARG_DOUBLE_BUFFER:
+xvimagesink->double_buffer = g_value_get_boolean (value);
+break;
+default:
+G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+break;
+}
+}
+static void
+gst_xvimagesink_get_property (GObject * object, guint prop_id,
+GValue * value, GParamSpec * pspec)
+{
+GstXvImageSink *xvimagesink;
+g_return_if_fail (GST_IS_XVIMAGESINK (object));
+xvimagesink = GST_XVIMAGESINK (object);
+switch (prop_id) {
+case ARG_HUE:
+g_value_set_int (value, xvimagesink->hue);
+break;
+case ARG_CONTRAST:
+g_value_set_int (value, xvimagesink->contrast);
+break;
+case ARG_BRIGHTNESS:
+g_value_set_int (value, xvimagesink->brightness);
+break;
+case ARG_SATURATION:
+g_value_set_int (value, xvimagesink->saturation);
+break;
+case ARG_DISPLAY:
+g_value_set_string (value, xvimagesink->display_name);
+break;
+case ARG_SYNCHRONOUS:
+g_value_set_boolean (value, xvimagesink->synchronous);
+break;
+case ARG_PIXEL_ASPECT_RATIO:
+if (xvimagesink->par)
+g_value_transform (xvimagesink->par, value);
+break;
+case ARG_FORCE_ASPECT_RATIO:
+g_value_set_boolean (value, xvimagesink->keep_aspect);
+break;
+case ARG_HANDLE_EVENTS:
+g_value_set_boolean (value, xvimagesink->handle_events);
+break;
+case ARG_DEVICE:
+{
+char *adaptor_no_s = g_strdup_printf ("%u", xvimagesink->adaptor_no);
+g_value_set_string (value, adaptor_no_s);
+g_free (adaptor_no_s);
+break;
+}
+case ARG_DEVICE_NAME:
+if (xvimagesink->xcontext && xvimagesink->xcontext->adaptors) {
+g_value_set_string (value,
+xvimagesink->xcontext->adaptors[xvimagesink->adaptor_no]);
+} else {
+g_value_set_string (value, NULL);
+}
+break;
+case ARG_HANDLE_EXPOSE:
+g_value_set_boolean (value, xvimagesink->handle_expose);
+break;
+case ARG_DOUBLE_BUFFER:
+g_value_set_boolean (value, xvimagesink->double_buffer);
+break;
+default:
+G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+break;
+}
+}
+static void
+gst_xvimagesink_reset (GstXvImageSink * xvimagesink)
+{
+GThread *thread;
+GST_OBJECT_LOCK (xvimagesink);
+xvimagesink->running = FALSE;
+/* grab thread and mark it as NULL */
+thread = xvimagesink->event_thread;
+xvimagesink->event_thread = NULL;
+GST_OBJECT_UNLOCK (xvimagesink);
+/* Wait for our event thread to finish before we clean up our stuff. */
+if (thread)
+g_thread_join (thread);
+if (xvimagesink->cur_image) {
+gst_buffer_unref (xvimagesink->cur_image);
+xvimagesink->cur_image = NULL;
+}
+if (xvimagesink->xvimage) {
+gst_buffer_unref (xvimagesink->xvimage);
+xvimagesink->xvimage = NULL;
+}
+gst_xvimagesink_imagepool_clear (xvimagesink);
+if (xvimagesink->xwindow) {
+gst_xvimagesink_xwindow_clear (xvimagesink, xvimagesink->xwindow);
+gst_xvimagesink_xwindow_destroy (xvimagesink, xvimagesink->xwindow);
+xvimagesink->xwindow = NULL;
+}
+gst_xvimagesink_xcontext_clear (xvimagesink);
+}
+/* Finalize is called only once, dispose can be called multiple times.
+* We use mutexes and don't reset stuff to NULL here so let's register
+* as a finalize. */
+static void
+gst_xvimagesink_finalize (GObject * object)
+{
+GstXvImageSink *xvimagesink;
+xvimagesink = GST_XVIMAGESINK (object);
+gst_xvimagesink_reset (xvimagesink);
+if (xvimagesink->display_name) {
+g_free (xvimagesink->display_name);
+xvimagesink->display_name = NULL;
+}
+if (xvimagesink->par) {
+g_free (xvimagesink->par);
+xvimagesink->par = NULL;
+}
+if (xvimagesink->x_lock) {
+g_mutex_free (xvimagesink->x_lock);
+xvimagesink->x_lock = NULL;
+}
+if (xvimagesink->flow_lock) {
+g_mutex_free (xvimagesink->flow_lock);
+xvimagesink->flow_lock = NULL;
+}
+if (xvimagesink->pool_lock) {
+g_mutex_free (xvimagesink->pool_lock);
+xvimagesink->pool_lock = NULL;
+}
+G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+static void
+gst_xvimagesink_init (GstXvImageSink * xvimagesink)
+{
+xvimagesink->display_name = NULL;
+xvimagesink->adaptor_no = 0;
+xvimagesink->xcontext = NULL;
+xvimagesink->xwindow = NULL;
+xvimagesink->xvimage = NULL;
+xvimagesink->cur_image = NULL;
+xvimagesink->hue = xvimagesink->saturation = 0;
+xvimagesink->contrast = xvimagesink->brightness = 0;
+xvimagesink->cb_changed = FALSE;
+xvimagesink->fps_n = 0;
+xvimagesink->fps_d = 0;
+xvimagesink->video_width = 0;
+xvimagesink->video_height = 0;
+xvimagesink->x_lock = g_mutex_new ();
+xvimagesink->flow_lock = g_mutex_new ();
+xvimagesink->image_pool = NULL;
+xvimagesink->pool_lock = g_mutex_new ();
+xvimagesink->synchronous = FALSE;
+xvimagesink->double_buffer = TRUE;
+xvimagesink->running = FALSE;
+xvimagesink->keep_aspect = FALSE;
+xvimagesink->handle_events = TRUE;
+xvimagesink->par = NULL;
+xvimagesink->handle_expose = TRUE;
+}
+static void
+gst_xvimagesink_base_init (gpointer g_class)
+{
+GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+gst_element_class_set_details (element_class, &gst_xvimagesink_details);
+gst_element_class_add_pad_template (element_class,
+gst_static_pad_template_get (&gst_xvimagesink_sink_template_factory));
+}
+static void
+gst_xvimagesink_class_init (GstXvImageSinkClass * klass)
+{
+GObjectClass *gobject_class;
+GstElementClass *gstelement_class;
+GstBaseSinkClass *gstbasesink_class;
+gobject_class = (GObjectClass *) klass;
+gstelement_class = (GstElementClass *) klass;
+gstbasesink_class = (GstBaseSinkClass *) klass;
+parent_class = g_type_class_peek_parent (klass);
+gobject_class->set_property = gst_xvimagesink_set_property;
+gobject_class->get_property = gst_xvimagesink_get_property;
+g_object_class_install_property (gobject_class, ARG_CONTRAST,
+g_param_spec_int ("contrast", "Contrast", "The contrast of the video",
+-1000, 1000, 0, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_BRIGHTNESS,
+g_param_spec_int ("brightness", "Brightness",
+"The brightness of the video", -1000, 1000, 0, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_HUE,
+g_param_spec_int ("hue", "Hue", "The hue of the video", -1000, 1000, 0,
+G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_SATURATION,
+g_param_spec_int ("saturation", "Saturation",
+"The saturation of the video", -1000, 1000, 0, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_DISPLAY,
+g_param_spec_string ("display", "Display", "X Display name", NULL,
+G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_SYNCHRONOUS,
+g_param_spec_boolean ("synchronous", "Synchronous",
+"When enabled, runs "
+"the X display in synchronous mode. (used only for debugging)", FALSE,
+G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_PIXEL_ASPECT_RATIO,
+g_param_spec_string ("pixel-aspect-ratio", "Pixel Aspect Ratio",
+"The pixel aspect ratio of the device", "1/1", G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_FORCE_ASPECT_RATIO,
+g_param_spec_boolean ("force-aspect-ratio", "Force aspect ratio",
+"When enabled, scaling will respect original aspect ratio", FALSE,
+G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_HANDLE_EVENTS,
+g_param_spec_boolean ("handle-events", "Handle XEvents",
+"When enabled, XEvents will be selected and handled", TRUE,
+G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_DEVICE,
+g_param_spec_string ("device", "Adaptor number",
+"The number of the video adaptor", "0", G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_DEVICE_NAME,
+g_param_spec_string ("device-name", "Adaptor name",
+"The name of the video adaptor", NULL, G_PARAM_READABLE));
+g_object_class_install_property (gobject_class, ARG_HANDLE_EXPOSE,
+g_param_spec_boolean ("handle-expose", "Handle expose", "When enabled, "
+"the current frame will always be drawn in response to X Expose "
+"events", TRUE, G_PARAM_READWRITE));
+g_object_class_install_property (gobject_class, ARG_DOUBLE_BUFFER,
+g_param_spec_boolean ("double-buffer", "Double-buffer",
+"Whether to double-buffer the output", TRUE, G_PARAM_READWRITE));
+gobject_class->finalize = gst_xvimagesink_finalize;
+gstelement_class->change_state =
+GST_DEBUG_FUNCPTR (gst_xvimagesink_change_state);
+gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_xvimagesink_getcaps);
+gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_xvimagesink_setcaps);
+gstbasesink_class->buffer_alloc =
+GST_DEBUG_FUNCPTR (gst_xvimagesink_buffer_alloc);
+gstbasesink_class->get_times = GST_DEBUG_FUNCPTR (gst_xvimagesink_get_times);
+gstbasesink_class->preroll = GST_DEBUG_FUNCPTR (gst_xvimagesink_show_frame);
+gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_xvimagesink_show_frame);
+}
+/* ============================================================= */
+/*                                                               */
+/*                       Public Methods                          */
+/*                                                               */
+/* ============================================================= */
+/* =========================================== */
+/*                                             */
+/*          Object typing & Creation           */
+/*                                             */
+/* =========================================== */
+GType
+gst_xvimagesink_get_type (void)
+{
+static GType xvimagesink_type = 0;
+if (!xvimagesink_type) {
+static const GTypeInfo xvimagesink_info = {
+sizeof (GstXvImageSinkClass),
+gst_xvimagesink_base_init,
+NULL,
+(GClassInitFunc) gst_xvimagesink_class_init,
+NULL,
+NULL,
+sizeof (GstXvImageSink),
+0,
+(GInstanceInitFunc) gst_xvimagesink_init,
+};
+static const GInterfaceInfo iface_info = {
+(GInterfaceInitFunc) gst_xvimagesink_interface_init,
+NULL,
+NULL,
+};
+static const GInterfaceInfo navigation_info = {
+(GInterfaceInitFunc) gst_xvimagesink_navigation_init,
+NULL,
+NULL,
+};
+static const GInterfaceInfo overlay_info = {
+(GInterfaceInitFunc) gst_xvimagesink_xoverlay_init,
+NULL,
+NULL,
+};
+static const GInterfaceInfo colorbalance_info = {
+(GInterfaceInitFunc) gst_xvimagesink_colorbalance_init,
+NULL,
+NULL,
+};
+static const GInterfaceInfo propertyprobe_info = {
+(GInterfaceInitFunc) gst_xvimagesink_property_probe_interface_init,
+NULL,
+NULL,
+};
+xvimagesink_type = g_type_register_static (GST_TYPE_VIDEO_SINK,
+"GstXvImageSink", &xvimagesink_info, 0);
+g_type_add_interface_static (xvimagesink_type,
+GST_TYPE_IMPLEMENTS_INTERFACE, &iface_info);
+g_type_add_interface_static (xvimagesink_type, GST_TYPE_NAVIGATION,
+&navigation_info);
+g_type_add_interface_static (xvimagesink_type, GST_TYPE_X_OVERLAY,
+&overlay_info);
+g_type_add_interface_static (xvimagesink_type, GST_TYPE_COLOR_BALANCE,
+&colorbalance_info);
+g_type_add_interface_static (xvimagesink_type, GST_TYPE_PROPERTY_PROBE,
+&propertyprobe_info);
+/* register type and create class in a more safe place instead of at
+* runtime since the type registration and class creation is not
+* threadsafe. */
+g_type_class_ref (gst_xvimage_buffer_get_type ());
+}
+return xvimagesink_type;
+}
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+if (!gst_element_register (plugin, "xvimagesink",
+GST_RANK_PRIMARY, GST_TYPE_XVIMAGESINK))
+return FALSE;
+GST_DEBUG_CATEGORY_INIT (gst_debug_xvimagesink, "xvimagesink", 0,
+"xvimagesink element");
+return TRUE;
+}
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+GST_VERSION_MINOR,
+"xvimagesink",
+"XFree86 video output plugin using Xv extension",
+plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

branch	RCL_3
changeset 30	7e817e7e631c
parent 0	0e761a78d257