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>
* Copyright (C) 2014 Collabora Ltd.
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*
* 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"
#include "wlvideoformat.h"
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#include "waylandpool.h"
#include <gst/wayland/wayland.h>
#include <gst/video/videooverlay.h>
/* signals */
enum
{
SIGNAL_0,
LAST_SIGNAL
};
/* Properties */
enum
{
PROP_0,
PROP_DISPLAY
};
GST_DEBUG_CATEGORY (gstwayland_debug);
#define GST_CAT_DEFAULT gstwayland_debug
#if G_BYTE_ORDER == G_BIG_ENDIAN
#define CAPS "{xRGB, ARGB}"
#else
#define CAPS "{BGRx, BGRA}"
#endif
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (CAPS))
);
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);
static GstStateChangeReturn gst_wayland_sink_change_state (GstElement * element,
GstStateChange transition);
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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_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);
/* VideoOverlay interface */
static void gst_wayland_sink_videooverlay_init (GstVideoOverlayInterface *
iface);
static void gst_wayland_sink_set_window_handle (GstVideoOverlay * overlay,
guintptr handle);
static void gst_wayland_sink_expose (GstVideoOverlay * overlay);
/* WaylandVideo interface */
static void gst_wayland_sink_waylandvideo_init (GstWaylandVideoInterface *
iface);
static void gst_wayland_sink_set_surface_size (GstWaylandVideo * video,
gint w, gint h);
static void gst_wayland_sink_pause_rendering (GstWaylandVideo * video);
static void gst_wayland_sink_resume_rendering (GstWaylandVideo * video);
#define gst_wayland_sink_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstWaylandSink, gst_wayland_sink, GST_TYPE_VIDEO_SINK,
G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_OVERLAY,
gst_wayland_sink_videooverlay_init)
G_IMPLEMENT_INTERFACE (GST_TYPE_WAYLAND_VIDEO,
gst_wayland_sink_waylandvideo_init));
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>");
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_wayland_sink_change_state);
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->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_DISPLAY,
g_param_spec_string ("display", "Wayland Display name", "Wayland "
"display name to connect to, if not supplied with GstVideoOverlay",
NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
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gst_wayland_sink_init (GstWaylandSink * sink)
{
g_cond_init (&sink->render_cond);
}
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_DISPLAY:
g_value_set_string (value, sink->display_name);
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_DISPLAY:
sink->display_name = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_wayland_sink_finalize (GObject * object)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (object);
GST_DEBUG_OBJECT (sink, "Finalizing the sink..");
if (sink->last_buffer)
gst_buffer_unref (sink->last_buffer);
if (sink->display) {
/* see comment about this call in gst_wayland_sink_change_state() */
if (sink->pool) {
gst_wayland_compositor_release_all_buffers (GST_WAYLAND_BUFFER_POOL
(sink->pool));
}
g_object_unref (sink->display);
}
if (sink->window)
g_object_unref (sink->window);
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if (sink->pool)
gst_object_unref (sink->pool);
if (sink->display_name)
g_free (sink->display_name);
g_cond_clear (&sink->render_cond);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstStateChangeReturn
gst_wayland_sink_change_state (GstElement * element, GstStateChange transition)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
if (!sink->window)
gst_video_overlay_prepare_window_handle (GST_VIDEO_OVERLAY (sink));
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (gst_wl_window_is_toplevel (sink->window)) {
/* Force all buffers to return to the pool, regardless of
* whether the compositor has released them or not. We are
* going to kill the display, so we need to return all buffers
* to be destroyed before this happens.
* Note that this is done here instead of the pool destructor
* because the buffers hold a reference to the pool. Also,
* the buffers can only be unref'ed from the display's event loop
* and the pool holds a reference to the display. If we drop
* our references here, when the compositor releases the buffers,
* they will be unref'ed from the event loop thread, which will
* unref the pool and therefore the display, which will try to
* stop the thread from within itself and cause a deadlock.
*/
if (sink->pool) {
gst_wayland_compositor_release_all_buffers (GST_WAYLAND_BUFFER_POOL
(sink->pool));
}
gst_buffer_replace (&sink->last_buffer, NULL);
g_clear_object (&sink->window);
g_clear_object (&sink->display);
g_clear_object (&sink->pool);
}
break;
default:
break;
}
return ret;
}
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 gboolean
gst_wayland_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstWaylandSink *sink;
GstBufferPool *newpool;
GstVideoInfo info;
GError *error = NULL;
enum wl_shm_format format;
GArray *formats;
gint i;
GstStructure *structure;
static GstAllocationParams params = { 0, 0, 0, 15, };
sink = GST_WAYLAND_SINK (bsink);
GST_OBJECT_LOCK (sink);
GST_DEBUG_OBJECT (sink, "set caps %" GST_PTR_FORMAT, caps);
/* extract info from caps */
if (!gst_video_info_from_caps (&info, caps))
goto invalid_format;
format = gst_video_format_to_wayland_format (GST_VIDEO_INFO_FORMAT (&info));
if (format == -1)
goto invalid_format;
/* store the video size */
sink->video_width = info.width;
sink->video_height = info.height;
/* create the output window if needed */
if (!sink->window) {
if (!sink->display)
sink->display = gst_wl_display_new (sink->display_name, &error);
if (sink->display == NULL)
goto display_failed;
sink->window = gst_wl_window_new_toplevel (sink->display, sink->video_width,
sink->video_height);
}
/* verify we support the requested format */
formats = sink->display->formats;
for (i = 0; i < formats->len; i++) {
if (g_array_index (formats, uint32_t, i) == format)
break;
}
if (i >= formats->len)
goto unsupported_format;
/* create a new pool for the new configuration */
newpool = gst_wayland_buffer_pool_new (sink->display);
if (!newpool)
goto pool_failed;
structure = gst_buffer_pool_get_config (newpool);
gst_buffer_pool_config_set_params (structure, caps, info.size, 2, 0);
gst_buffer_pool_config_set_allocator (structure, NULL, &params);
if (!gst_buffer_pool_set_config (newpool, structure))
goto config_failed;
gst_object_replace ((GstObject **) & sink->pool, (GstObject *) newpool);
gst_object_unref (newpool);
GST_OBJECT_UNLOCK (sink);
return TRUE;
invalid_format:
{
GST_DEBUG_OBJECT (sink,
"Could not locate image format from caps %" GST_PTR_FORMAT, caps);
goto failure;
}
display_failed:
{
GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_READ_WRITE,
("Could not initialise Wayland output"),
("Failed to create GstWlDisplay: '%s'", error->message));
g_error_free (error);
goto failure;
}
unsupported_format:
{
GST_DEBUG_OBJECT (sink, "Format %s is not available on the display",
gst_wayland_format_to_string (format));
goto failure;
}
pool_failed:
{
GST_DEBUG_OBJECT (sink, "Failed to create new pool");
goto failure;
}
config_failed:
{
GST_DEBUG_OBJECT (bsink, "failed setting config");
goto failure;
}
failure:
{
GST_OBJECT_UNLOCK (sink);
return FALSE;
}
}
static gboolean
gst_wayland_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (bsink);
GstBufferPool *pool = NULL;
GstStructure *config;
GstCaps *caps;
guint size;
gboolean need_pool;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
if (sink->pool)
pool = gst_object_ref (sink->pool);
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->display);
/* 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)
{
GstWaylandSink *sink = data;
GST_LOG ("frame_redraw_cb");
g_atomic_int_set (&sink->redraw_pending, FALSE);
wl_callback_destroy (callback);
}
static const struct wl_callback_listener frame_callback_listener = {
frame_redraw_callback
};
/* must be called with the object lock */
static void
render_last_buffer (GstWaylandSink * sink)
{
GstWlMeta *meta;
struct wl_surface *surface;
struct wl_callback *callback;
GstVideoRectangle src, dst, res;
meta = gst_buffer_get_wl_meta (sink->last_buffer);
surface = gst_wl_window_get_wl_surface (sink->window);
g_atomic_int_set (&sink->redraw_pending, TRUE);
callback = wl_surface_frame (surface);
wl_callback_add_listener (callback, &frame_callback_listener, sink);
/* Here we essentially add a reference to the buffer. This represents
* the fact that the compositor is using the buffer and it should
* not return back to the pool and be reused until the compositor
* releases it. The release is handled internally in the pool */
gst_wayland_compositor_acquire_buffer (meta->pool, sink->last_buffer);
src.w = sink->video_width;
src.h = sink->video_height;
dst.w = sink->window->width;
dst.h = sink->window->height;
gst_video_sink_center_rect (src, dst, &res, FALSE);
wl_viewport_set (sink->window->viewport, wl_fixed_from_int (0),
wl_fixed_from_int (0), wl_fixed_from_int (src.w),
wl_fixed_from_int (src.h), res.w, res.h);
wl_surface_attach (surface, meta->wbuffer, 0, 0);
wl_surface_damage (surface, 0, 0, res.w, res.h);
wl_surface_commit (surface);
wl_display_flush (sink->display->display);
}
static GstFlowReturn
gst_wayland_sink_render (GstBaseSink * bsink, GstBuffer * buffer)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (bsink);
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GstBuffer *to_render;
GstWlMeta *meta;
GstFlowReturn ret = GST_FLOW_OK;
GST_OBJECT_LOCK (sink);
GST_LOG_OBJECT (sink, "render buffer %p", buffer);
/* surface is resizing - drop buffers until finished */
if (sink->drawing_frozen)
goto done;
/* drop buffers until we get a frame callback */
if (g_atomic_int_get (&sink->redraw_pending) == TRUE)
goto done;
meta = gst_buffer_get_wl_meta (buffer);
if (meta && meta->pool->display == sink->display) {
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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);
}
gst_buffer_replace (&sink->last_buffer, to_render);
render_last_buffer (sink);
/* notify _resume_rendering() in case it's waiting */
sink->rendered = TRUE;
g_cond_broadcast (&sink->render_cond);
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if (buffer != to_render)
gst_buffer_unref (to_render);
goto done;
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no_buffer:
{
GST_WARNING_OBJECT (sink, "could not create image");
goto done;
}
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"));
ret = GST_FLOW_ERROR;
goto done;
}
activate_failed:
{
GST_ERROR_OBJECT (sink, "failed to activate bufferpool.");
ret = GST_FLOW_ERROR;
goto done;
}
done:
{
GST_OBJECT_UNLOCK (sink);
return ret;
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}
}
static void
gst_wayland_sink_videooverlay_init (GstVideoOverlayInterface * iface)
{
iface->set_window_handle = gst_wayland_sink_set_window_handle;
iface->expose = gst_wayland_sink_expose;
}
static void
gst_wayland_sink_set_window_handle (GstVideoOverlay * overlay, guintptr handle)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (overlay);
GstWaylandWindowHandle *whandle = (GstWaylandWindowHandle *) handle;
GError *error = NULL;
GstPad *peer;
g_return_if_fail (sink != NULL);
GST_DEBUG_OBJECT (sink, "Setting window handle %" GST_PTR_FORMAT,
(void *) handle);
if (GST_STATE (sink) > GST_STATE_READY)
gst_wayland_sink_pause_rendering (GST_WAYLAND_VIDEO (sink));
g_clear_object (&sink->window);
g_clear_object (&sink->display);
if (handle) {
sink->display =
gst_wl_display_new_existing (whandle->display, FALSE, &error);
if (error) {
GST_ELEMENT_WARNING (sink, RESOURCE, OPEN_READ_WRITE,
("Could not set window handle"),
("Failed to use the external wayland display: '%s'", error->message));
g_error_free (error);
} else {
wl_proxy_set_queue ((struct wl_proxy *) whandle->surface,
sink->display->queue);
sink->window = gst_wl_window_new_from_surface (sink->display,
whandle->surface, whandle->width, whandle->height);
}
} else {
/* reconfigure to force creation of new window in set_caps */
sink->negotiated = FALSE;
peer = gst_pad_get_peer (GST_VIDEO_SINK_PAD (sink));
if (peer) {
gst_pad_send_event (peer, gst_event_new_reconfigure ());
gst_object_unref (peer);
}
}
if (GST_STATE (sink) > GST_STATE_READY)
gst_wayland_sink_resume_rendering (GST_WAYLAND_VIDEO (sink));
}
static void
gst_wayland_sink_expose (GstVideoOverlay * overlay)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (overlay);
g_return_if_fail (sink != NULL);
GST_DEBUG_OBJECT (sink, "expose");
GST_OBJECT_LOCK (sink);
if (sink->last_buffer && g_atomic_int_get (&sink->redraw_pending) == FALSE) {
GST_DEBUG_OBJECT (sink, "redrawing last buffer");
render_last_buffer (sink);
}
GST_OBJECT_UNLOCK (sink);
}
static void
gst_wayland_sink_waylandvideo_init (GstWaylandVideoInterface * iface)
{
iface->set_surface_size = gst_wayland_sink_set_surface_size;
iface->pause_rendering = gst_wayland_sink_pause_rendering;
iface->resume_rendering = gst_wayland_sink_resume_rendering;
}
static void
gst_wayland_sink_set_surface_size (GstWaylandVideo * video, gint w, gint h)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (video);
g_return_if_fail (sink != NULL);
g_return_if_fail (sink->window != NULL);
GST_OBJECT_LOCK (sink);
if (!sink->window) {
GST_OBJECT_UNLOCK (sink);
GST_WARNING_OBJECT (sink,
"set_surface_size called without window, ignoring");
return;
}
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GST_DEBUG_OBJECT (sink, "changing window size to %d x %d", w, h);
gst_wl_window_set_size (sink->window, w, h);
GST_OBJECT_UNLOCK (sink);
}
static void
gst_wayland_sink_pause_rendering (GstWaylandVideo * video)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (video);
g_return_if_fail (sink != NULL);
GST_OBJECT_LOCK (sink);
sink->drawing_frozen = TRUE;
GST_OBJECT_UNLOCK (sink);
}
static void
gst_wayland_sink_resume_rendering (GstWaylandVideo * video)
{
GstWaylandSink *sink = GST_WAYLAND_SINK (video);
g_return_if_fail (sink != NULL);
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GST_DEBUG_OBJECT (sink, "resuming rendering");
GST_OBJECT_LOCK (sink);
sink->drawing_frozen = FALSE;
if (GST_STATE (sink) == GST_STATE_PLAYING) {
sink->rendered = FALSE;
while (sink->rendered == FALSE)
g_cond_wait (&sink->render_cond, GST_OBJECT_GET_LOCK (sink));
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GST_DEBUG_OBJECT (sink, "synchronized with render()");
} else if (sink->window && sink->last_buffer &&
g_atomic_int_get (&sink->redraw_pending) == FALSE) {
render_last_buffer (sink);
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GST_DEBUG_OBJECT (sink, "last buffer redrawn");
}
GST_OBJECT_UNLOCK (sink);
}
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)