Commit graph

71 commits

Author SHA1 Message Date
Edward Hervey
2b59d8ab7c waylandsink: Free leaked GstStructure
Coverity CID : 1256565
2015-01-23 12:44:22 +01:00
Benjamin Gaignard
23bb5f5319 waylandsink: do not render twice the same buffer
Do not try to render a buffer that is already being rendered.
This happens typically during the initial rendering stage as the first
buffer is rendered twice: first by preroll(), then by render().
This commit avoids this assertion failure:
  CRITICAL: gst_wayland_compositor_acquire_buffer: assertion
  'meta->used_by_compositor == FALSE' failed

https://bugzilla.gnome.org/show_bug.cgi?id=738069

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
2014-10-11 17:35:41 +02:00
George Kiagiadakis
5b1c5dbf99 waylandsink: stack the video subsurface into another subsurface that covers the whole render rectangle
The main reason behind this is that when the video caps change and the video
subsurface needs to resize and change position, the wl_subsurface.set_position
call needs a commit in its parent in order to take effect. Previously,
the parent was the application's surface, over which there is no control.
Now, the parent is inside the sink, so we can commit it and change size smoothly.

As a side effect, this also allows the sink to draw its black borders on
its own, without the need for the application to do that. And another side
effect is that this can now allow resizing the sink when it is in top-level
mode and have it respect the aspect ratio.
2014-10-11 14:57:14 +02:00
George Kiagiadakis
ee7968dd4a waylandsink: rename video format conversion functions to indicate they are about wl_shm
Needed to add linux_dmabuf format conversion functions later
2014-10-11 14:57:14 +02:00
George Kiagiadakis
4377a5d71c waylandsink: remove the ugly gst_wl_display_stop() now that this mechanism is not needed anymore
Because we no longer have a custom buffer pool that holds a reference
to the display, there is no way for a cyclic reference to happen like
before, so we no longer need to explicitly call a function from the
display to release the wl_buffers.

However, the general mechanism of registering buffers to the display
and forcibly releasing them when the display is destroyed is still
needed to avoid potential memory leaks. The comment in wlbuffer.c
is updated to reflect the current situation.
2014-10-11 14:57:13 +02:00
George Kiagiadakis
d7bddb0c51 waylandsink: replace the custom buffer pool with an allocator
This reduces the complexity of having a custom buffer pool, as
we don't really need it. We only need the custom allocation part.
And since the wl_buffer is no longer saved in a GstMeta, we can
create it and add it on the buffers in the sink's render()
function, which removes the reference cycle caused by the pool
holding a reference to the display and also allows more generic
scenarios (the allocator being used in another pool, or buffers
being allocated without a pool [if anything stupid does that]).

This commit also simplifies the propose_allocation() function,
which doesn't really need to do all these complicated checks,
since there is always a correct buffer pool available, created
in set_caps().

The other side effect of this commit is that a new wl_shm_pool
is now created for every GstMemory, which means that we use
as much shm memory as we actually need and no more. Previously,
the created wl_shm_pool would allocate space for 15 buffers, no
matter if they were being used or not.
2014-10-11 14:57:13 +02:00
George Kiagiadakis
9807d58b01 waylandsink: rework the mechanism for keeping buffers out of the pool until wl_buffer::release
This also removes the GstWlMeta and adds a wrapper class for wl_buffer
which is saved in the GstBuffer qdata instead of being a GstMeta.

The motivation behind this is mainly to allow attaching wl_buffers on
GstBuffers that have not been allocated inside the GstWaylandBufferPool,
so that if for example an upstream element is sending us a buffer
from a different pool, which however does not need to be copied
to a buffer from our pool because it may be a hardware buffer
(hello dmabuf!), we can create a wl_buffer directly from it and first,
attach it on it so that we don't have to re-create a wl_buffer every
time the same GstBuffer arrives and second, force the whole mechanism
for keeping the buffer out of the pool until there is a wl_buffer::release
on that foreign GstBuffer.
2014-10-11 14:57:13 +02:00
Ognyan Tonchev
8b0030d044 waylandsink: do not leak buffer pool in error case
https://bugzilla.gnome.org/show_bug.cgi?id=736735
2014-09-17 09:43:58 +03:00
Sebastian Dröge
902a9a56d0 waylandsink: Fix compiler warning
gstwaylandsink.c:480:14: error: comparison of constant -1 with expression of
      type 'enum wl_shm_format' is always false
      [-Werror,-Wtautological-constant-out-of-range-compare]
  if (format == -1)
      ~~~~~~ ^  ~~
2014-06-21 16:57:18 +02:00
George Kiagiadakis
c4616a550a waylandsink: remove the buffer from the surface when going PAUSED -> READY
This essentially hides the video and allows the application to
potentially draw a black background or whatever else it wants.
This allows to differentiate the "paused" and "stopped" modes
from the user's point of view.

Also reworded a comment there to make my thinking more clear,
since the "reason for keeping the display around" is not really
the exposed() calls, as there is no buffer shown in READY/NULL
anymore.
2014-06-17 13:51:30 +02:00
George Kiagiadakis
bda600ed92 waylandsink: improve the way the video size is passed to wlwindow and also improve the code for window creation 2014-06-17 13:51:29 +02:00
George Kiagiadakis
86930cab13 waylandsink: rename pause/resume_rendering to begin/end_geometry_change and update their documentation 2014-06-17 13:51:28 +02:00
George Kiagiadakis
06639dd727 waylandsink: remove the manual synchronization from pause/resume_rendering and use subsurface sync/desync
Previously, in order to change the surface size we had to let the pipeline
redraw it, which at first also involved re-negotiating caps, etc, so a
synchronization with the pipeline was absolutely necessary.

At the moment, we are using wl_viewport, which separates the surface size
from the buffer size and it also allows us to commit a surface resize without
attaching a new buffer, so it is enough to just do:

gst_wayland_video_pause_rendering():
	wl_subsurface_set_sync()
gst_video_overlay_set_render_rectangle():
	wl_subsurface_set_position()
	wl_viewport_set_destination()
	wl_surface_damage()
	wl_surface_commit()
... commit the parent surface ...
gst_wayland_video_resume_rendering():
	wl_subsurface_set_desync()

This is enough to synchronize a surface resize and the pipeline can continue
drawing independently. Now of course, the names pause/resume_rendering are
bad. I will rename them in another commit.
2014-06-17 13:51:28 +02:00
George Kiagiadakis
c17521c096 waylandsink: protect access to properties with the OBJECT_LOCK 2014-06-17 13:51:28 +02:00
George Kiagiadakis
d4d46fa43a waylandsink: protect access to the display with a new display_lock
Access is protected only for setting/creating/destroying the display
handle. set_caps() for example is not protected because it cannot be
called before changing state to READY, at which point there will be
a display handle available and which cannot change by any thread at
that point
2014-06-17 13:51:28 +02:00
George Kiagiadakis
c323171dc1 waylandsink: remove the OBJECT_LOCK from set_caps()
It's not really necessary, this method is protected from GstBaseSink with the PREROLL_LOCK
2014-06-17 13:51:28 +02:00
George Kiagiadakis
db8caa9da4 waylandsink: Replace the OBJECT_LOCK with a private render_lock to lock render operations
This is because:
* GST_ELEMENT_WARNING/ERROR do lock the OBJECT_LOCK and we deadlock instantly
* In future commits I want to make use of GstBaseSink functions that also
  lock the OBJECT_LOCK inside this code
2014-06-17 13:51:28 +02:00
George Kiagiadakis
cffb38993d waylandsink: move surface resizing logic to the GstWlWindow and make it be called from the main thread 2014-06-17 13:51:28 +02:00
George Kiagiadakis
07f671fcaf waylandsink: create and maintain the subsurface inside the sink
This means that the given surface in set_window_handle can now be
the window's top-level surface on top of which waylandsink creates
its own subsurface for rendering the video.

This has many advantages:
* We can maintain aspect ratio by overlaying the subsurface in
  the center of the given area and fill the parent surface's area
  black in case we need to draw borders (instead of adding another
  subsurface inside the subsurface given from the application,
  so, less subsurfaces)
* We can more easily support toolkits without subsurfaces (see gtk)
* We can get properly use gst_video_overlay_set_render_rectangle
  as our api to set the video area size from the application and
  therefore remove gst_wayland_video_set_surface_size.
2014-06-17 13:51:27 +02:00
George Kiagiadakis
b806313396 wayland: add public API for creating & using the display handle GstContext 2014-06-17 13:51:27 +02:00
George Kiagiadakis
c62ec6f815 waylandsink: get the external display handle using GstContext
This drops the ugly GstWaylandWindowHandle structure and is much
more elegant because we can now request the display separately
from the window handle. Therefore the window handle can be requested
in render(), i.e. when it is really needed and we can still open
the correct display for getting caps and creating the pool earlier.

This change also separates setting the wl_surface from setting its size.
Applications should do that by calling two functions in sequence:

  gst_video_overlay_set_window_handle (overlay, surface);
  gst_wayland_video_set_surface_size (overlay, w, h);
2014-06-17 13:51:27 +02:00
George Kiagiadakis
bd5ad17e58 waylandsink: drop width/height arguments from gst_wl_window_new_from_surface() 2014-06-17 13:51:27 +02:00
George Kiagiadakis
882e1dd240 waylandsink: fix assertion failure when stopping immediately after starting, without displaying anything
This was triggered in scenarios like
filesrc location=nonexistent_file ! decodebin ! waylandsink
2014-06-17 13:51:27 +02:00
George Kiagiadakis
a543aef5ee waylandsink: Update wl_scaler to version 2 2014-06-17 13:51:26 +02:00
George Kiagiadakis
2f45d91ccd waylandsink: Add myself to the authors list 2014-06-17 13:51:26 +02:00
George Kiagiadakis
c015a96dda waylandsink: create/destroy the display when entering/leaving the READY state instead of PAUSED
This is the only way to get the negotiation working with the dynamic
detection of formats from the display, because the pipeline needs
to know the supported formats in the READY state and the supported
formats can only be known if we open the display.

Unfortunately,in wayland we cannot have a separate connection to
the display from the rest of the application, so we need to ask for a
window handle when going to READY in order to get the display from it.

And since it's too early to create a top level window from the state
change to READY, create it in render() when there is no other window.

This also changes set_window_handle() to not support window handle
changes in PAUSED/PLAYING (because it's complex to handle and useless
in practice) and make sure that there is always a valid display pointer
around in the READY state.
2014-06-17 13:51:26 +02:00
George Kiagiadakis
f6e824ecba waylandsink: Support all video formats supported by the display 2014-06-17 13:51:26 +02:00
George Kiagiadakis
de15c21413 waylandsink: fix crash in case there is no pool because of a caps negotiation error 2014-06-17 13:51:25 +02:00
George Kiagiadakis
a98f589aef waylandsink: increase debug messages 2014-06-17 13:51:25 +02:00
George Kiagiadakis
5bb889a3df waylandsink: Use a boolean in combination with render_cond to comply with GCond's usage documentation 2014-06-17 13:51:25 +02:00
George Kiagiadakis
66f8c1389b waylandsink: Implement expose() and handle resizing properly in non-PLAYING states 2014-06-17 13:51:25 +02:00
George Kiagiadakis
086ac4ee81 waylandsink: Use wl_scaler/wl_viewport to scale the surface in the compositor/hardware 2014-06-17 13:51:25 +02:00
George Kiagiadakis
12444ec84e waylandsink: Set external surfaces and their child objects to use our own event queue
This fixes weird freezes because of frame_redraw_callback() not being
called from the main thread when it should with weston's toy toolkit.

It's also safer to know that frame_redraw_callback() will always be
called from our display thread... Otherwise it could be called after
the sink has been destroyed for example.
2014-06-17 13:51:24 +02:00
George Kiagiadakis
fabc5305be waylandsink: Wait for the frame_cb to redraw and drop frames meanwhile
We are not supposed to redraw until we receive a frame callback and this
is especially useful to avoid allocating too many buffers while the
window is not visible, because the compositor may not call wl_buffer.release
until the window becomes visible (ok, this is a wayland bug, but...).
2014-06-17 13:51:24 +02:00
George Kiagiadakis
51a2c694ad waylandsink: Handle wl_buffer::release and don't reuse buffers that are not released
This is achieved by adding an extra reference on the buffers, which does
not allow them to return to the pool. When they are released, this reference
is dropped.

The rest complexity of this patch (hash table, mutex, flag, explicit release calls)
merely exists to allow a safe, guaranteed and deadlock-free destruction sequence.
See the added comment on gstwaylandsink.c for details.
2014-06-17 13:51:24 +02:00
George Kiagiadakis
e56f305274 waylandsink: implement the GstVideoOverlay & GstWaylandVideo interfaces
This is the initial implementation, without the GstVideoOverlay.expose()
method. It only implements using an external (sub)surface and resizing
it with GstWaylandVideo.
2014-06-17 13:51:24 +02:00
George Kiagiadakis
68133361ec waylandsink: implement with stubs the GstWaylandVideo & GstVideoOverlay interfaces 2014-06-17 13:51:23 +02:00
George Kiagiadakis
26ce7f2344 waylandsink: handle the list of supported formats properly
enum wl_shm_format is not a flags enum, as it may have been in the past,
so multiple formats cannot be stored in a bitfield. Use an array instead.
2014-06-17 13:51:23 +02:00
George Kiagiadakis
f800e2b4fa waylandsink: unref the buffer pool 2014-06-17 13:51:23 +02:00
George Kiagiadakis
a67b08cdd0 waylandsink/waylandpool: ref the display instead of the sink to avoid cyclic references
The reference to the sink is not really needed anyway in waylandpool,
what matters basically is that the display is active as long as the
pool is active, so we really want to reference the display object
instead of the sink.
2014-06-17 13:51:23 +02:00
George Kiagiadakis
253eafd4ef waylandsink: make the display property useful
Let the display property control the name of the display,
like in x(v)imagesink.
2014-06-17 13:51:23 +02:00
George Kiagiadakis
e7650117af waylandsink: access sink->pool in a more atomic fashion 2014-06-17 13:51:22 +02:00
George Kiagiadakis
58a4d247b3 waylandsink: remove the useless wayland_lock 2014-06-17 13:51:22 +02:00
George Kiagiadakis
ac9503ed65 waylandsink: cleanup header includes 2014-06-17 13:51:22 +02:00
George Kiagiadakis
ae6aebd9d5 waylandsink: split window-related code out to a new GstWlWindow class
GstWlWindow also has API ready to support subsurfaces.
2014-06-17 13:51:22 +02:00
George Kiagiadakis
05f0842572 waylandsink: remove callback and redraw_pending variables from the window structure 2014-06-17 13:51:22 +02:00
George Kiagiadakis
f6e72c8725 waylandsink: split video format related functions out to a separate file 2014-06-17 13:51:21 +02:00
George Kiagiadakis
1e45b1480c waylandsink: move struct shm_pool and its related functions to waylandpool.c
And also make the instance of this struct to be owned by the buffer
pool instead of the element, for the sake of isolation
2014-06-17 13:51:21 +02:00
George Kiagiadakis
4208ae6203 waylandsink: remove unused variables 2014-06-17 13:51:21 +02:00
George Kiagiadakis
e600a323b7 waylandsink: process display events in a separate thread
This also moves the display-related code into a new GstWlDisplay class,
which takes care of the new thread
2014-06-17 13:51:20 +02:00