gstreamer/ext/wayland/gstwaylandsink.c

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/*
* GStreamer Wayland video sink
*
* Copyright (C) 2011 Intel Corporation
* Copyright (C) 2011 Sreerenj Balachandran <sreerenj.balachandran@intel.com>
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* Copyright (C) 2012 Wim Taymans <wim.taymans@gmail.com>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/**
* SECTION:element-waylandsink
*
* The waylandsink is creating its own window and render the decoded video frames to that.
* Setup the Wayland environment as described in
* <ulink url="http://wayland.freedesktop.org/building.html">Wayland</ulink> home page.
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* The current implementaion is based on weston compositor.
*
* <refsect2>
* <title>Example pipelines</title>
* |[
* gst-launch -v videotestsrc ! waylandsink
* ]| test the video rendering in wayland
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "gstwaylandsink.h"
/* signals */
enum
{
SIGNAL_0,
SIGNAL_FRAME_READY,
LAST_SIGNAL
};
/* Properties */
enum
{
PROP_0,
PROP_WAYLAND_DISPLAY
};
GST_DEBUG_CATEGORY (gstwayland_debug);
#define GST_CAT_DEFAULT gstwayland_debug
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw, "
"format = (string) BGRA, "
"framerate = (fraction) [ 0, MAX ], "
"width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ] "));
/*Fixme: Add more interfaces */
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#define gst_wayland_sink_parent_class parent_class
G_DEFINE_TYPE (GstWaylandSink, gst_wayland_sink, GST_TYPE_VIDEO_SINK);
/* wl metadata */
GType
gst_wl_meta_api_get_type (void)
{
static volatile GType type;
static const gchar *tags[] =
{ "memory", "size", "colorspace", "orientation", NULL };
if (g_once_init_enter (&type)) {
GType _type = gst_meta_api_type_register ("GstWlMetaAPI", tags);
g_once_init_leave (&type, _type);
}
return type;
}
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static void
gst_wl_meta_free (GstWlMeta * meta, GstBuffer * buffer)
{
gst_object_unref (meta->sink);
munmap (meta->data, meta->size);
wl_buffer_destroy (meta->wbuffer);
}
const GstMetaInfo *
gst_wl_meta_get_info (void)
{
static const GstMetaInfo *wl_meta_info = NULL;
if (wl_meta_info == NULL) {
wl_meta_info =
gst_meta_register (GST_WL_META_API_TYPE, "GstWlMeta",
sizeof (GstWlMeta), (GstMetaInitFunction) NULL,
(GstMetaFreeFunction) gst_wl_meta_free,
(GstMetaTransformFunction) NULL);
}
return wl_meta_info;
}
static void gst_wayland_sink_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_wayland_sink_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_wayland_sink_finalize (GObject * object);
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static GstCaps *gst_wayland_sink_get_caps (GstBaseSink * bsink,
GstCaps * filter);
static gboolean gst_wayland_sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
static gboolean gst_wayland_sink_start (GstBaseSink * bsink);
static gboolean gst_wayland_sink_stop (GstBaseSink * bsink);
static gboolean gst_wayland_sink_preroll (GstBaseSink * bsink,
GstBuffer * buffer);
static gboolean gst_wayland_sink_render (GstBaseSink * bsink,
GstBuffer * buffer);
static int event_mask_update (uint32_t mask, void *data);
static struct display *create_display (void);
static void display_handle_global (struct wl_display *display, uint32_t id,
const char *interface, uint32_t version, void *data);
static void redraw (void *data, struct wl_callback *callback, uint32_t time);
static void create_window (GstWaylandSink * sink, struct display *display,
int width, int height);
static void
gst_wayland_sink_class_init (GstWaylandSinkClass * klass)
{
GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gobject_class->set_property = gst_wayland_sink_set_property;
gobject_class->get_property = gst_wayland_sink_get_property;
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_wayland_sink_finalize);
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gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details_simple (gstelement_class,
"wayland video sink", "Sink/Video",
"Output to wayland surface",
"Sreerenj Balachandran <sreerenj.balachandran@intel.com>");
gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_wayland_sink_get_caps);
gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_wayland_sink_set_caps);
gstbasesink_class->start = GST_DEBUG_FUNCPTR (gst_wayland_sink_start);
gstbasesink_class->stop = GST_DEBUG_FUNCPTR (gst_wayland_sink_stop);
gstbasesink_class->preroll = GST_DEBUG_FUNCPTR (gst_wayland_sink_preroll);
gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_wayland_sink_render);
g_object_class_install_property (gobject_class, PROP_WAYLAND_DISPLAY,
g_param_spec_pointer ("wayland-display", "Wayland Display",
"Wayland Display handle created by the application ",
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
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gst_wayland_sink_init (GstWaylandSink * sink)
{
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sink->render_busy = FALSE;
sink->display = NULL;
sink->window = NULL;
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g_mutex_init (&sink->wayland_lock);
}
static void
gst_wayland_sink_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (object);
switch (prop_id) {
case PROP_WAYLAND_DISPLAY:
g_value_set_pointer (value, sink->display);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_wayland_sink_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (object);
switch (prop_id) {
case PROP_WAYLAND_DISPLAY:
sink->display = g_value_get_pointer (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
destroy_display (struct display *display)
{
if (display->shm)
wl_shm_destroy (display->shm);
if (display->shell)
wl_shell_destroy (display->shell);
if (display->compositor)
wl_compositor_destroy (display->compositor);
wl_display_flush (display->display);
wl_display_destroy (display->display);
free (display);
}
static void
destroy_window (struct window *window)
{
if (window->shell_surface)
wl_shell_surface_destroy (window->shell_surface);
if (window->surface)
wl_surface_destroy (window->surface);
free (window);
}
static void
gst_wayland_sink_finalize (GObject * object)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (object);
GST_DEBUG_OBJECT (sink, "Finalizing the sink..");
if (sink->window)
destroy_window (sink->window);
if (sink->display)
destroy_display (sink->display);
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g_mutex_clear (&sink->wayland_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
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gst_wayland_sink_get_caps (GstBaseSink * bsink, GstCaps * filter)
{
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return gst_static_pad_template_get_caps (&sink_template);
}
static int
event_mask_update (uint32_t mask, void *data)
{
struct display *d = data;
d->mask = mask;
return 0;
}
static void
shm_format (void *data, struct wl_shm *wl_shm, uint32_t format)
{
struct display *d = data;
d->formats |= (1 << format);
}
struct wl_shm_listener shm_listenter = {
shm_format
};
static void
display_handle_global (struct wl_display *display, uint32_t id,
const char *interface, uint32_t version, void *data)
{
struct display *d = data;
if (strcmp (interface, "wl_compositor") == 0) {
d->compositor = wl_display_bind (display, id, &wl_compositor_interface);
} else if (strcmp (interface, "wl_shell") == 0) {
d->shell = wl_display_bind (display, id, &wl_shell_interface);
} else if (strcmp (interface, "wl_shm") == 0) {
d->shm = wl_display_bind (display, id, &wl_shm_interface);
wl_shm_add_listener (d->shm, &shm_listenter, d);
}
}
static struct display *
create_display (void)
{
struct display *display;
display = malloc (sizeof *display);
display->display = wl_display_connect (NULL);
assert (display->display);
wl_display_add_global_listener (display->display,
display_handle_global, display);
wl_display_iterate (display->display, WL_DISPLAY_READABLE);
wl_display_roundtrip (display->display);
if (!(display->formats & (1 << WL_SHM_FORMAT_XRGB8888))) {
GST_ERROR ("WL_SHM_FORMAT_XRGB32 not available");
return NULL;
}
wl_display_get_fd (display->display, event_mask_update, display);
return display;
}
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static GstBuffer *
wayland_buffer_create (GstWaylandSink * sink)
{
char filename[1024];
int fd, size, stride;
static void *data;
static int init = 0;
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GstBuffer *buffer;
GstWlMeta *wmeta;
GST_DEBUG_OBJECT (sink, "Creating wayland-shm buffers");
snprintf (filename, 256, "%s-%d-%s", "/tmp/wayland-shm", init++, "XXXXXX");
fd = mkstemp (filename);
if (fd < 0) {
GST_ERROR_OBJECT (sink, "open %s failed:", filename);
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return NULL;
}
stride = sink->video_width * 4;
size = stride * sink->video_height;
if (ftruncate (fd, size) < 0) {
GST_ERROR_OBJECT (sink, "ftruncate failed:");
close (fd);
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return NULL;
}
data = mmap (NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
unlink (filename);
if (data == MAP_FAILED) {
GST_ELEMENT_ERROR (sink, LIBRARY, SHUTDOWN, (NULL),
("mmap() failed: %s", strerror (errno)));
close (fd);
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return NULL;
}
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buffer = gst_buffer_new ();
wmeta = (GstWlMeta *) gst_buffer_add_meta (buffer, GST_WL_META_INFO, NULL);
wmeta->sink = gst_object_ref (sink);
wmeta->wbuffer = wl_shm_create_buffer (sink->display->shm, fd,
sink->video_width, sink->video_height, stride, WL_SHM_FORMAT_XRGB8888);
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wmeta->data = data;
wmeta->size = size;
close (fd);
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gst_buffer_append_memory (buffer,
gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE, data,
size, 0, size, NULL, NULL));
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return buffer;
}
static gboolean
gst_wayland_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (bsink);
const GstStructure *structure;
gboolean ret = TRUE;
GST_LOG_OBJECT (sink, "set caps %" GST_PTR_FORMAT, caps);
structure = gst_caps_get_structure (caps, 0);
ret &= gst_structure_get_int (structure, "width", &sink->video_width);
ret &= gst_structure_get_int (structure, "height", &sink->video_height);
if (!ret)
return FALSE;
return TRUE;
}
static const struct wl_callback_listener frame_listener;
static void
redraw (void *data, struct wl_callback *callback, uint32_t time)
{
GstWaylandSink *sink = (GstWaylandSink *) data;
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sink->render_busy = FALSE;
}
static void
create_window (GstWaylandSink * sink, struct display *display, int width,
int height)
{
struct window *window;
if (sink->window)
return;
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g_mutex_lock (&sink->wayland_lock);
window = malloc (sizeof *window);
window->display = display;
window->width = width;
window->height = height;
window->surface = wl_compositor_create_surface (display->compositor);
window->shell_surface = wl_shell_get_shell_surface (display->shell,
window->surface);
/* wl_shell_surface_set_toplevel (window->shell_surface); */
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#ifdef WL_SHELL_SURFACE_FULLSCREEN_METHOD_DEFAULT
wl_shell_surface_set_fullscreen (window->shell_surface,
WL_SHELL_SURFACE_FULLSCREEN_METHOD_DEFAULT, 0, NULL);
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#endif
sink->window = window;
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g_mutex_unlock (&sink->wayland_lock);
}
static gboolean
gst_wayland_sink_start (GstBaseSink * bsink)
{
GstWaylandSink *sink = (GstWaylandSink *) bsink;
gboolean result = TRUE;
GST_DEBUG_OBJECT (sink, "start");
if (!sink->display)
sink->display = create_display ();
return result;
}
static gboolean
gst_wayland_sink_stop (GstBaseSink * bsink)
{
GstWaylandSink *sink = (GstWaylandSink *) bsink;
GST_DEBUG_OBJECT (sink, "stop");
return TRUE;
}
static GstFlowReturn
gst_wayland_sink_preroll (GstBaseSink * bsink, GstBuffer * buffer)
{
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GST_DEBUG_OBJECT (bsink, "preroll buffer %p", buffer);
return gst_wayland_sink_render (bsink, buffer);
}
static GstFlowReturn
gst_wayland_sink_render (GstBaseSink * bsink, GstBuffer * buffer)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (bsink);
GstVideoRectangle src, dst, res;
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GstBuffer *to_render;
GstWlMeta *meta;
GST_LOG_OBJECT (sink, "render buffer %p", buffer);
if (!sink->window)
create_window (sink, sink->display, sink->video_width, sink->video_height);
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if (sink->render_busy)
goto was_busy;
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meta = gst_buffer_get_wl_meta (buffer);
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if (meta && meta->sink == sink) {
GST_LOG_OBJECT (sink, "buffer %p from our pool, writing directly", buffer);
to_render = buffer;
} else {
GstMapInfo src;
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GST_LOG_OBJECT (sink, "buffer %p not from our pool, copying", buffer);
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to_render = wayland_buffer_create (sink);
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gst_buffer_map (buffer, &src, GST_MAP_READ);
gst_buffer_fill (to_render, 0, src.data, src.size);
gst_buffer_unmap (buffer, &src);
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meta = gst_buffer_get_wl_meta (to_render);
}
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src.w = sink->video_width;
src.h = sink->video_height;
dst.w = sink->window->width;
dst.h = sink->window->height;
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gst_video_sink_center_rect (src, dst, &res, FALSE);
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sink->render_busy = TRUE;
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wl_buffer_damage (meta->wbuffer, 0, 0, res.w, res.h);
wl_surface_attach (sink->window->surface, meta->wbuffer, 0, 0);
wl_surface_damage (sink->window->surface, 0, 0, res.w, res.h);
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if (sink->callback)
wl_callback_destroy (sink->callback);
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sink->callback = wl_surface_frame (sink->window->surface);
wl_callback_add_listener (sink->callback, &frame_listener, sink);
wl_display_iterate (sink->display->display, sink->display->mask);
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if (buffer != to_render)
gst_buffer_unref (to_render);
return GST_FLOW_OK;
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was_busy:
{
GST_LOG_OBJECT (sink,
"Waiting to get the signal from compositor to render the next frame..");
return GST_FLOW_OK;
}
}
static const struct wl_callback_listener frame_listener = {
redraw
};
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gstwayland_debug, "waylandsink", 0,
" wayland video sink");
return gst_element_register (plugin, "waylandsink", GST_RANK_MARGINAL,
GST_TYPE_WAYLAND_SINK);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
waylandsink,
"Wayland Video Sink", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,
GST_PACKAGE_ORIGIN)