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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 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,
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);
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_propose_allocation (GstBaseSink * bsink, GstQuery * query);
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 frame_redraw_callback (void *data, struct wl_callback *callback,
uint32_t time);
static void create_window (GstWaylandSink * sink, struct display *display,
int width, int height);
static void shm_pool_destroy (struct shm_pool *pool);
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_static_metadata (gstelement_class,
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"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->propose_allocation =
GST_DEBUG_FUNCPTR (gst_wayland_sink_propose_allocation);
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)
{
sink->display = NULL;
sink->window = NULL;
sink->shm_pool = NULL;
sink->pool = 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_disconnect (display->display);
free (display);
}
static void
destroy_window (struct window *window)
{
if (window->callback)
wl_callback_destroy (window->callback);
if (window->buffer)
wl_buffer_destroy (window->buffer);
if (window->shell_surface)
wl_shell_surface_destroy (window->shell_surface);
if (window->surface)
wl_surface_destroy (window->surface);
free (window);
}
static void
shm_pool_destroy (struct shm_pool *pool)
{
munmap (pool->data, pool->size);
wl_shm_pool_destroy (pool->pool);
free (pool);
}
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);
if (sink->shm_pool)
shm_pool_destroy (sink->shm_pool);
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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)
{
GstWaylandSink *sink;
GstCaps *caps;
sink = GST_WAYLAND_SINK (bsink);
caps = gst_pad_get_pad_template_caps (GST_VIDEO_SINK_PAD (sink));
if (filter) {
GstCaps *intersection;
intersection =
gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
caps = intersection;
}
return caps;
}
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);
if (display->display == NULL) {
free (display);
return NULL;
}
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;
}
static gboolean
gst_wayland_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (bsink);
GstBufferPool *newpool, *oldpool;
GstVideoInfo info;
GstStructure *structure;
static GstAllocationParams params = { 0, 0, 0, 15, };
guint size;
sink = GST_WAYLAND_SINK (bsink);
GST_LOG_OBJECT (sink, "set caps %" GST_PTR_FORMAT, caps);
if (!gst_video_info_from_caps (&info, caps))
goto invalid_format;
sink->video_width = info.width;
sink->video_height = info.height;
size = info.size;
/* create a new pool for the new configuration */
newpool = gst_wayland_buffer_pool_new (sink);
if (!newpool) {
GST_DEBUG_OBJECT (sink, "Failed to create new pool");
return FALSE;
}
structure = gst_buffer_pool_get_config (newpool);
gst_buffer_pool_config_set_params (structure, caps, size, 2, 0);
gst_buffer_pool_config_set_allocator (structure, NULL, &params);
if (!gst_buffer_pool_set_config (newpool, structure))
goto config_failed;
oldpool = sink->pool;
sink->pool = newpool;
if (oldpool)
gst_object_unref (oldpool);
return TRUE;
invalid_format:
{
GST_DEBUG_OBJECT (sink,
"Could not locate image format from caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
config_failed:
{
GST_DEBUG_OBJECT (bsink, "failed setting config");
return FALSE;
}
}
static void
handle_ping (void *data, struct wl_shell_surface *shell_surface,
uint32_t serial)
{
wl_shell_surface_pong (shell_surface, serial);
}
static void
handle_configure (void *data, struct wl_shell_surface *shell_surface,
uint32_t edges, int32_t width, int32_t height)
{
}
static void
handle_popup_done (void *data, struct wl_shell_surface *shell_surface)
{
}
static const struct wl_shell_surface_listener shell_surface_listener = {
handle_ping,
handle_configure,
handle_popup_done
};
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->redraw_pending = FALSE;
window->surface = wl_compositor_create_surface (display->compositor);
window->shell_surface = wl_shell_get_shell_surface (display->shell,
window->surface);
g_return_if_fail (window->shell_surface);
wl_shell_surface_add_listener (window->shell_surface,
&shell_surface_listener, window);
wl_shell_surface_set_toplevel (window->shell_surface);
wl_shell_surface_set_fullscreen (window->shell_surface,
WL_SHELL_SURFACE_FULLSCREEN_METHOD_SCALE, 0, NULL);
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 ();
if (sink->display == NULL) {
GST_ELEMENT_ERROR (bsink, RESOURCE, OPEN_READ_WRITE,
("Could not initialise Wayland output"),
("Could not create Wayland display"));
return FALSE;
}
return result;
}
static gboolean
gst_wayland_sink_stop (GstBaseSink * bsink)
{
GstWaylandSink *sink = (GstWaylandSink *) bsink;
GST_DEBUG_OBJECT (sink, "stop");
return TRUE;
}
static gboolean
gst_wayland_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (bsink);
GstBufferPool *pool;
GstStructure *config;
GstCaps *caps;
guint size;
gboolean need_pool;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
g_mutex_lock (&sink->wayland_lock);
if ((pool = sink->pool))
gst_object_ref (pool);
g_mutex_unlock (&sink->wayland_lock);
if (pool != NULL) {
GstCaps *pcaps;
/* we had a pool, check caps */
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
if (!gst_caps_is_equal (caps, pcaps)) {
/* different caps, we can't use this pool */
gst_object_unref (pool);
pool = NULL;
}
gst_structure_free (config);
}
if (pool == NULL && need_pool) {
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
GST_DEBUG_OBJECT (sink, "create new pool");
pool = gst_wayland_buffer_pool_new (sink);
/* the normal size of a frame */
size = info.size;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, 2, 0);
if (!gst_buffer_pool_set_config (pool, config))
goto config_failed;
}
if (pool) {
gst_query_add_allocation_pool (query, pool, size, 2, 0);
gst_object_unref (pool);
}
return TRUE;
/* ERRORS */
no_caps:
{
GST_DEBUG_OBJECT (bsink, "no caps specified");
return FALSE;
}
invalid_caps:
{
GST_DEBUG_OBJECT (bsink, "invalid caps specified");
return FALSE;
}
config_failed:
{
GST_DEBUG_OBJECT (bsink, "failed setting config");
gst_object_unref (pool);
return FALSE;
}
}
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 void
frame_redraw_callback (void *data, struct wl_callback *callback, uint32_t time)
{
struct window *window = (struct window *) data;
window->redraw_pending = FALSE;
wl_callback_destroy (callback);
}
static const struct wl_callback_listener frame_callback_listener = {
frame_redraw_callback
};
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;
GstFlowReturn ret;
struct window *window;
struct display *display;
GST_LOG_OBJECT (sink, "render buffer %p", buffer);
if (!sink->window)
create_window (sink, sink->display, sink->video_width, sink->video_height);
window = sink->window;
display = sink->display;
/* Wait for the previous frame to complete redraw */
if (window->redraw_pending) {
wl_display_iterate (display->display, WL_DISPLAY_READABLE);
}
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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;
GST_LOG_OBJECT (sink, "buffer %p not from our pool, copying", buffer);
if (!sink->pool)
goto no_pool;
if (!gst_buffer_pool_set_active (sink->pool, TRUE))
goto activate_failed;
ret = gst_buffer_pool_acquire_buffer (sink->pool, &to_render, NULL);
if (ret != GST_FLOW_OK)
goto no_buffer;
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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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wl_surface_attach (sink->window->surface, meta->wbuffer, 0, 0);
wl_surface_damage (sink->window->surface, 0, 0, res.w, res.h);
wl_display_iterate (display->display, WL_DISPLAY_WRITABLE);
window->redraw_pending = TRUE;
window->callback = wl_surface_frame (window->surface);
wl_callback_add_listener (window->callback, &frame_callback_listener, window);
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if (buffer != to_render)
gst_buffer_unref (to_render);
return GST_FLOW_OK;
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no_buffer:
{
GST_WARNING_OBJECT (sink, "could not create image");
return ret;
}
no_pool:
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{
GST_ELEMENT_ERROR (sink, RESOURCE, WRITE,
("Internal error: can't allocate images"),
("We don't have a bufferpool negotiated"));
return GST_FLOW_ERROR;
}
activate_failed:
{
GST_ERROR_OBJECT (sink, "failed to activate bufferpool.");
ret = GST_FLOW_ERROR;
return ret;
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}
}
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)