Commit graph

52 commits

Author SHA1 Message Date
Vedant Paranjape
0e8d8fbd4e gstreamer: Update format specifier in Request Pad template
Change format specifier %s to %u in name template field of request pad
template.

Pad names are as follows, src_0, src_1, etc. So, instead of using string
format specifier, use unsigned integer format specifier.

Signed-off-by: Vedant Paranjape <vedantparanjape160201@gmail.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
2021-08-05 14:32:02 +09:00
Vedant Paranjape
f573198d3e gstreamer: Store group_id in GstLibcameraSrcState
This patch adds group_id in GstLibcameraSrcState, since group_id is
something which should be same for all the pads, it can be reused
later.

Signed-off-by: Vedant Paranjape <vedantparanjape160201@gmail.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
2021-07-28 10:44:37 +09:00
Kieran Bingham
5c01d54120 libcamera: rename public libcamera dependency
Now that we have a libcamera_private, make the public only dependency
libcamera_public so that it is clear which interface is being linked.

Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-06-25 16:11:11 +01:00
Vedant Paranjape
53a0d80af0 gstreamer: Added virtual functions needed to support request pads
This patch adds support for using request pads in libcamerasrc Gst
Element. It allows a user to request multiple streams if the platform
supports multistream output using libcamera.

This was tested on Raspberry Pi 4B+ with a camera connected to CSI port.
It can be tested by running the following command

gst-launch-1.0 libcamerasrc camera-name="<camera-name-here>" name=src src.src ! queue ! videoconvert ! autovideosink src.src_0 ! queue ! videoconvert ! autovideosink

Signed-off-by: Vedant Paranjape <vedantparanjape160201@gmail.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
2021-06-25 20:03:49 +09:00
Vedant Paranjape
1e5cee7017 gstreamer: Add error checking in gst_libcamera_src_task_enter()
The return value from generateConfiguration() was not checked. Only assert
was added as a guard which checked if the size of the generated camera
config was equal to size of roles passed to it.

If the roles variable has an invalid/unsupported role, it will return
a nullptr and then trying to access a member on a nullptr for size comparison
will result in a segmentation fault. So, if the function returns a nullptr,
simply push an error message on GstBus and gracefully exit.

Signed-off-by: Vedant Paranjape <vedantparanjape160201@gmail.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
2021-06-07 14:06:50 +09:00
Laurent Pinchart
19652e5028 gst: Fix compilation warning with GLib >= 2.62
GLib 2.62 has deprecated g_memdup(), which is used inline in GStreamer's
gstbytereader.h header. This results in a compilation warning:

In file included from /usr/include/gstreamer-1.0/gst/base/base.h:35,
                 from ../../src/gstreamer/gstlibcamerasrc.cpp:39:
/usr/include/gstreamer-1.0/gst/base/gstbytereader.h: In function ‘guint8* gst_byte_reader_dup_data_unchecked(GstByteReader*, guint)’:
/usr/include/gstreamer-1.0/gst/base/gstbytereader.h:365:41: error: ‘void* g_memdup(gconstpointer, guint)’ is deprecated: Use 'g_memdup2' instead [-Werror=deprecated-declarations]
  365 |   return (guint8 *) g_memdup (data, size);

GLib has a mechanism to silence warnings introduced in newer versions,
to allow compilation without warnings on multiple versions of the
library. This is done by setting the GLIB_VERSION_MIN_REQUIRED macro to
the minimum GLib version required.

As we depend on GStreamer >= 1.14, set the minimum GLib version to 2.40.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
2021-05-31 23:18:25 +03:00
Laurent Pinchart
b68721608a meson: Summarize which applications and adaptation layers are built
Add the application and adaptation layers being built to the meson
summary. The summary now prints

libcamera 0.0.0

  Configuration
         Enabled pipelines: ipu3
                            raspberrypi
                            rkisp1
                            simple
                            uvcvideo
                            vimc

           Android support: True
         GStreamer support: True
    V4L2 emulation support: True
           cam application: True
          qcam application: True
                Unit tests: True

  Subprojects
                    libyuv: YES

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
2021-03-28 01:47:26 +02:00
Laurent Pinchart
976e01d59b meson: Use subdir_done() to reduce indentation
Reduce the indentation in the gstreamer and qcam meson.build with
subdir_done(). This follows similar patterns in cam and v4l2.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-03-23 19:15:44 +02:00
Dafna Hirschfeld
287e4f82bd gst: Use the streams of CameraConfiguration when allocating buffers
Currently, when allocating buffers, the streams of the Camera object are
used. Instead the streams of the CameraConfiguration object should be
used. This is because the Camera object holds all available streams
while the CameraConfiguration holds only the streams associated with the
current configuration.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-03-15 02:13:19 +02:00
Marian Cichy
80bebfb64e libcamera: gst: Fix double-free when acquire_buffer fails
If gst_buffer_pool_acquire_buffer in gst_libcamera_task_run fails, the
unique_ptr to the request-object gets reset and hence, its destructor
is called. However, the wrap-object points to the same object and is
still alive at this moment. When the task_run-function is finished, the
destructor of the wrap-object is called, which in return calls the
destructor of the request-object again.

Instead of taking care of both, the request and the wrap-object, we can
move the request to the wrap which will then effectively take care of
the request object automatically.

Signed-off-by: Marian Cichy <m.cichy@pengutronix.de>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
2021-03-12 22:38:15 +02:00
Nicolas Dufresne
6795ffe67f gst: pool: Fix GstBuffer leak on error
We borrowed a GstBuffer from the pool, if preparing the buffer failed,
we need to push it back to avoid leaking it.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-03-12 00:46:07 +02:00
Nicolas Dufresne
488bbe40a9 gst: provider: Fix crash in finalize
Both the DeviceProvider and Device classes had the same mistake,
calling G_OBJECT_GET_CLASS() instead of G_OBJECT_CLASS() when
chaining their finalize call to their base class. This would
crash at destruction, which was causing gst-device-monitor-1.0
tool to crash and application using that API to crash too.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-03-12 00:40:05 +02:00
Laurent Pinchart
db27029ce4 meson: Fix coding style when declaring arrays
The meson.build files mix array declarations with and without a space
after the opening and before the closing square bracket. The vast
majority of cases don't use spaces, so standardize on that.

While it it, fix indentation in a few places.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-02-11 18:20:22 +02:00
Laurent Pinchart
fa63d428ae gstreamer: libcamerasrc: Delete configuration before stopping camera manager
When closing the libcamerasrc, the reference to camera is released and
the camera manager is stopped. However, the camera configuration still
exists at that point, and holds a reference to the camera. This leads to
a warning from the device enumerator complaining that the media devices
are still in use:

[1:53:48.792327560] [408] ERROR DeviceEnumerator device_enumerator.cpp:165 Removing media device /dev/media1 while still in use
[1:53:48.792354022] [408] ERROR DeviceEnumerator device_enumerator.cpp:165 Removing media device /dev/media0 while still in use

A crash follows when the libcamerasrc is finalized, as deleting the
camera configuration will then release the last reference to the camera,
which attempts to delete the camera object with deleteLater() without an
event dispatcher.

Fix it by deleting the camera configuration before stopping the camera
manager.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
2020-11-07 20:24:31 +02:00
Hirokazu Honda
da0dd36149 gstreamer: Omit extra semicolons
Macros used in gstreamer (e.g. G_DEFINE_TYPE) are functions. The
end semicolons with the macros are unnecessary.

Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-10-20 13:15:47 +03:00
Paul Elder
c753223ad6 libcamera, android, cam, gstreamer, qcam, v4l2: Reuse Request
Allow reuse of the Request object by implementing reuse(). This means
the applications now have the responsibility of freeing the Request
objects, so make all libcamera users (cam, qcam, v4l2-compat, gstreamer,
android) do so.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2020-10-12 11:32:40 +09:00
Laurent Pinchart
dbafe16da7 meson: Remove -Wno-unused-parameter
We build libcamera with -Wno-unused-parameter and this doesn't cause
much issue internally. However, it prevents catching unused parameters
in inline functions defined in public headers. This can lead to
compilation warnings for applications compiled without
-Wno-unused-parameter.

To catch those issues, remove -Wno-unused-parameter and fix all the
related warnings with [[maybe_unused]].

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2020-08-25 02:58:04 +03:00
Laurent Pinchart
f976eb5cb6 libcamera: Remove void specifier for functions that take no arguments
In C++, unlike in C, a function that takes no argument doesn't need to
specify void in the arguments list. Drop the unnecessary specifiers.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2020-08-25 02:03:08 +03:00
Niklas Söderlund
2e7c80a4f9 libcamera: camera: Rename name() to id()
Rename Camera::name() to camera::id() to better describe what it
represents, a unique and stable ID for the camera. While at it improve
the documentation for the camera ID to describe it needs to be stable
for a camera between resets of the system.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-08-05 20:07:13 +02:00
Laurent Pinchart
2748265edc gst: Replace explicit DRM FourCCs with libcamera formats
Use the new pixel format constants to replace usage of macros from
drm_fourcc.h.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2020-06-18 13:26:43 +03:00
Laurent Pinchart
7a653369cb licenses: License all meson files under CC0-1.0
In an attempt to clarify the license terms of all files in the libcamera
project, the build system files deserve particular attention. While they
describe how the binaries are created, they are not themselves
transformed into any part of binary distributions of the software, and
thus don't influence the copyright on the binary packages. They are
however subject to copyright, and thus influence the distribution terms
of the source packages.

Most of the meson.build files would not meet the threshold of
originality criteria required for copyright protection. Some of the more
complex meson.build files may be eligible for copyright protection. To
avoid any ambiguity and uncertainty, state our intent to not assert
copyrights on the build system files by putting them in the public
domain with the CC0-1.0 license.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Acked-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Acked-by: Jacopo Mondi <jacopo@jmondi.org>
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Acked-by: Naushir Patuck <naush@raspberrypi.com>
Acked-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Acked-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Acked-by: Paul Elder <paul.elder@ideasonboard.com>
Acked-by: Show Liu <show.liu@linaro.org>
2020-05-13 16:46:24 +03:00
Laurent Pinchart
4ff18e9506 libcamera: framebuffer_allocator: Lift camera restrictions on allocator
The Camera class currently requires the allocator to have no allocated
buffer before the camera is reconfigured, and the allocator to be
destroyed before the camera is released. There's no basis for these
restrictions anymore, remove them.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2020-03-18 19:15:18 +02:00
Laurent Pinchart
718f5e99a9 libcamera: PixelFormat: Make constructor explicit
To achieve the goal of preventing unwanted conversion between a DRM and
a V4L2 FourCC, make the PixelFormat constructor that takes an integer
value explicit. All users of pixel formats flagged by the compiler
are fixed.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2020-03-18 18:02:40 +01:00
Niklas Söderlund
f28ca20960 libcamera: Use PixelFormat instead of unsigned int where appropriate
Use the PixelFormat instead of unsigned int where a pixel format is to
be used. PixelFormat is defined as an unsigned int but is about to be
turned into a class to add functionality.

There is no functional change in this patch.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-18 18:02:40 +01:00
Laurent Pinchart
34396936f7 gst: Fix GLib detection
Commit 17cccc68a8 ("Add GStreamer plugin and element skeleton") has
gained a last minute fix for a clang compilation error with GLib prior
to v2.63.0. The fix wasn't properly tested, and failed to check the GLib
dependency correctly. This resulted in compilation of the GStreamer
element to always be disabled.

Fix this by changing the GLib package name from 'glib' to 'glib-2.0'.

Fixes: 17cccc68a8 ("Add GStreamer plugin and element skeleton")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
2020-03-07 21:54:06 +02:00
Laurent Pinchart
f36ecf9824 gst: Turn the top-level plugin file gstlibcamera.c into a C++ file
The top-level plugin file gstlibcamera.c is the only C source file in
the whole libcamera GStreamer element. To avoid specifying both C and
C++ compiler arguments in the future, turn it into a C++ file.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
2020-03-07 21:53:59 +02:00
Jakub Adam
170def84c6 gst: libcamerasrc: Prevent src task deadlock on exhausted buffer pool
Allow GstLibcameraPool to notify the source when a new buffer has become
available in a previously exhausted buffer pool. This can be used to
resume a src task that got paused because it couldn't acquire a buffer.

Without this change the src task will never resume from pause once the
pool gets exhausted.

To trigger the deadlock (it doesn't happen every time), run:

  gst-launch-1.0 libcamerasrc ! queue ! glimagesink

Signed-off-by: Jakub Adam <jakub.adam@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:58:08 +02:00
Jakub Adam
9dab15bed6 gst: utils: Factor-out the task resume helper
Task resume will be added in the core GStreamer API in the future and
we will need to call this in another location in the following patches.

Signed-off-by: Jakub Adam <jakub.adam@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:58:08 +02:00
Nicolas Dufresne
a9ce14b0e0 gst: libcamerasrc: Add a TODO comment
This is to guide upcoming contributors toward what is left to do to get
toward a production ready element.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:58:08 +02:00
Nicolas Dufresne
0c4147c3b6 gst: libcamerasrc: Implement timestamp support
This is an experimental patch adding timestamp support to the libcamerasrc
element. This patch currently assume that the driver timestamp are relative to
the system monotonic clock. Without a reference clock source, the timestamp are
otherwise unusable, and without timestamp only minor use case can be achieved.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:58:08 +02:00
Nicolas Dufresne
d1d1348228 gst: libcamerasrc: Implement initial streaming
With this patch, the element is now able to push buffers to the next
element in the graph. The buffers are currently missing any metadata
like timestamp, sequence number. This will be added in the next commit.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:58:08 +02:00
Nicolas Dufresne
5d6db0936f gst: pad: Add method to store retrieve pending buffers
These will be useful for streaming. The requestComplete callback will
store the buffers on each pads so that the _run() can pick them up
and push them through the pads from a streaming thread.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:58:08 +02:00
Nicolas Dufresne
db50b1072a gst: Add getters for Stream and FrameBuffer
This adds getters on pad/pool/allocator so that we can retrieve the
Stream or FrameBuffer.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:58:08 +02:00
Nicolas Dufresne
6d0cf98bb1 gst: libcamerasrc: Allocate and release buffers
Setup the allocation and the release of buffers in the
element. We have one pooling GstAllocator that wraps the
FrameBufferAllocator and tracks the lifetime of FrameBuffer
objects. Then, for each pad we have a GstBufferPool object
which is only used to avoid re-allocating the GstBuffer
structure every time we push a buffer.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:58:08 +02:00
Nicolas Dufresne
a801f5e4f6 gst: libcamerapad: Allow storing a pool
This adds get/set helper to store a pool on the pad.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:58:08 +02:00
Nicolas Dufresne
bde275408c gst: Add a pool and an allocator implementation
This is needed to track the lifetime of the FrameBufferAllocator in relation to
the GstBuffer/GstMemory objects travelling inside GStreamer.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:58:07 +02:00
Nicolas Dufresne
d343326d28 gst: libcamerasrc: Push segment event
Now that we have stream-start and caps, we can now push a segment event to
announce what time will our buffer correlate to. For live sources this is just
an open segment in time format.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
2575b49160 gst: libcamerasrc: Implement minimal caps negotiation
This is not expected to work in every possible cases, but should be sufficient as
an initial implementation. What it does is that it turns the StreamFormats into
caps and queries downstream caps with that as a filter.

The result is the subset of caps that can be used. We then keep the first
structure in that result and fixate using the default values found in
StreamConfiguration as a default in case a range is available.

We then validate this configuration and turn the potentially modified
configuration into caps that we push downstream. Note that we trust the order
in StreamFormats as being sorted best first, but this is not currently in
libcamera. A todo has been added in the head of this file as a reminder to fix
that in the core.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
bd0c2df110 gst: utils: Add StreamConfiguration helpers
This adds helpers to deal with the conversion from StreamConfiguration
to caps and vice-versa. This is needed to implement caps negotiation.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
e5f4398c19 gst: libcamerasrc: Send stream start event
Prior to sending caps, we need to send a stream-start event. This requires
generating a stream and a group id. The stream id is random for live sources and
the group id is shared across all pads.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
6d69661c24 gst: libcamerasrc: Store the srcpad in a vector
This will allow implementing generic algorithm even if we cannot
request pads yet.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
d41b356564 gst: libcamerapad: Add a method to access the role
Each pad can have a different roles. Users will have to request and configure
their pads role before moving to a higher state.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
1d8cbaf214 gst: libcamerasrc: Add a task for the streaming thread
Use a GstTask as our internal streaming thread. Unlike GstBaseSrc, we
will be running a streaming thread at the element level rather than
per pad. This is needed to combine buffer request for multiple pads.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
58feb69f85 gst: libcamerasrc: Implement selection and acquisition
This adds code to select and acquire a camera. With this, it is now
possible to run a pipeline like:

   gst-launch-1.0 libcamerasrc ! fakesink

Though no buffer will be streamed yet. In this function, we implement the
change_state() virtual method to trigger actions on specific state transitions.
Note that we also return GST_STATE_CHANGE_NO_PREROLL in
GST_STATE_CHANGE_READY_TO_PAUSED and GST_STATE_CHANGE_PLAYING_TO_PAUSED
transitions as this is required for all live sources.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
cfa61225a4 gst: libcamerasrc: Add a debug category
This will allow selecting libcamerasrc traces with the following
environment:

  GST_DEBUG=libcamerasrc:7

Or all libcamera GStreamer element traces using

  GST_DEBUG="libcamera*:7"

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
2c93810ec1 gst: libcamerasrc: Add camera-name property
This property will be used to select by name the camera to use.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
26c923a27c gst: libcamerasrc: Allocate and add static pad
This pad will always be present and will allow simple pipeline to be used to
stream from the camera.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
71a28f9593 gst: Add pads to the source
This simply adds the boiler plate for pads on the source element. The
design is that we have one pad, called "src", that will always be
present, and then more pads can be requested prior in READY or less
state. Initially pads have one property "stream-role" that let you
decide which role this pad will have.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
7e82d3c2a1 gst: utils: Add simple scoped lockers for GMutex and GRectMutex
While GLib has locker implementation already using g_autoptr(), recursive mutex
locker was only introduced in recent GLib. Implement a simple locker for GMutex
and GRectMutex in order to allow making locking simpler and safer.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00
Nicolas Dufresne
0e0cc2149e gst: Add initial device provider
This feature is used with GstDeviceMonitor in order to enumerate
and monitor devices to be used with the source element. The resulting
GstDevice implementation is also used by application to abstract the
configuration of the source element.

Implementation notes:
  - libcamera does not support polling yet
  - The device ID isn't unique in libcamera yet
  - The "name" property does not yet exist in libcamerasrc yet

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07 01:57:45 +02:00