clients: add simple-v4l-dmabuf client
This client opens a V4L2 device, usually exposed as /dev/videoN, and retrieves its frames as dmabuf for later import into the compositor. It supports both single- and multi-planar devices, and any format exposed by the V4L2 device the Wayland compositor accepts. This client never changes the v4l2 settings, use `v4l2-ctl -c` if you want to change those. Signed-off-by: Emmanuel Gil Peyrot <emmanuel.peyrot@collabora.com> Acked-by: Derek Foreman <derekf@osg.samsung.com> Tested-by: Derek Foreman <derekf@osg.samsung.com> Maniphest Tasks: T90 Differential Revision: https://phabricator.freedesktop.org/D339
This commit is contained in:
Emmanuel Gil Peyrot
Derek Foreman
parent
8ef2957873
commit
5d43af3e88
1
.gitignore
vendored
1
.gitignore
vendored
@ -67,6 +67,7 @@ weston-presentation-shm
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weston-resizor
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weston-scaler
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weston-simple-dmabuf-intel
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weston-simple-dmabuf-v4l
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weston-simple-egl
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weston-simple-shm
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weston-simple-touch
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15
Makefile.am
15
Makefile.am
@ -538,6 +538,21 @@ weston_simple_dmabuf_intel_LDADD = $(SIMPLE_DMABUF_INTEL_CLIENT_LIBS) libshared.
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BUILT_SOURCES += protocol/linux-dmabuf-unstable-v1-client-protocol.h
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endif
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if BUILD_SIMPLE_DMABUF_V4L_CLIENT
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demo_clients += weston-simple-dmabuf-v4l
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weston_simple_dmabuf_v4l_SOURCES = clients/simple-dmabuf-v4l.c
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nodist_weston_simple_dmabuf_v4l_SOURCES = \
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protocol/xdg-shell-unstable-v5-protocol.c \
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protocol/xdg-shell-unstable-v5-client-protocol.h \
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protocol/fullscreen-shell-unstable-v1-protocol.c \
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protocol/fullscreen-shell-unstable-v1-client-protocol.h \
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protocol/linux-dmabuf-unstable-v1-protocol.c \
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protocol/linux-dmabuf-unstable-v1-client-protocol.h
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weston_simple_dmabuf_v4l_CFLAGS = $(AM_CFLAGS) $(SIMPLE_DMABUF_V4L_CLIENT_CFLAGS)
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weston_simple_dmabuf_v4l_LDADD = $(SIMPLE_DMABUF_V4L_CLIENT_LIBS) libshared.la
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BUILT_SOURCES += protocol/linux-dmabuf-unstable-v1-client-protocol.h
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endif
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noinst_LTLIBRARIES += libtoytoolkit.la
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libtoytoolkit_la_SOURCES = \
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945
clients/simple-dmabuf-v4l.c
Normal file
945
clients/simple-dmabuf-v4l.c
Normal file
@ -0,0 +1,945 @@
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/*
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* Copyright © 2015 Collabora Ltd.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <drm_fourcc.h>
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#include <stropts.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <linux/videodev2.h>
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#include <linux/input.h>
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#include <wayland-client.h>
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#include "xdg-shell-unstable-v5-client-protocol.h"
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#include "fullscreen-shell-unstable-v1-client-protocol.h"
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#include "linux-dmabuf-unstable-v1-client-protocol.h"
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#define CLEAR(x) memset(&(x), 0, sizeof(x))
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static int
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xioctl(int fh, int request, void *arg)
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{
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int r;
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do {
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r = ioctl(fh, request, arg);
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} while (r == -1 && errno == EINTR);
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return r;
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}
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static uint32_t
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parse_format(const char fmt[4])
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{
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return fourcc_code(fmt[0], fmt[1], fmt[2], fmt[3]);
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}
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static inline const char *
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dump_format(uint32_t format, char out[4])
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{
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#if BYTE_ORDER == BIG_ENDIAN
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format = __builtin_bswap32(format);
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#endif
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memcpy(out, &format, 4);
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return out;
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}
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struct buffer_format {
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int width;
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int height;
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enum v4l2_buf_type type;
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uint32_t format;
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unsigned num_planes;
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unsigned strides[VIDEO_MAX_PLANES];
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};
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struct display {
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struct wl_display *display;
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struct wl_registry *registry;
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struct wl_compositor *compositor;
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struct wl_seat *seat;
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struct wl_keyboard *keyboard;
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struct xdg_shell *shell;
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struct zwp_fullscreen_shell_v1 *fshell;
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struct zwp_linux_dmabuf_v1 *dmabuf;
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bool requested_format_found;
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int v4l_fd;
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struct buffer_format format;
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uint32_t drm_format;
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};
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struct buffer {
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struct wl_buffer *buffer;
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struct display *display;
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int busy;
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int index;
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int dmabuf_fds[VIDEO_MAX_PLANES];
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int data_offsets[VIDEO_MAX_PLANES];
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};
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#define NUM_BUFFERS 3
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struct window {
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struct display *display;
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struct wl_surface *surface;
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struct xdg_surface *xdg_surface;
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struct buffer buffers[NUM_BUFFERS];
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struct wl_callback *callback;
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};
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static bool running = true;
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static int
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queue(struct display *display, struct buffer *buffer)
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{
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struct v4l2_buffer buf;
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struct v4l2_plane planes[VIDEO_MAX_PLANES];
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unsigned i;
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CLEAR(buf);
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buf.type = display->format.type;
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buf.memory = V4L2_MEMORY_MMAP;
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buf.index = buffer->index;
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if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
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CLEAR(planes);
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buf.length = VIDEO_MAX_PLANES;
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buf.m.planes = planes;
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}
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if (xioctl(display->v4l_fd, VIDIOC_QUERYBUF, &buf) == -1) {
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perror("VIDIOC_QUERYBUF");
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return 0;
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}
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if (xioctl(display->v4l_fd, VIDIOC_QBUF, &buf) == -1) {
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perror("VIDIOC_QBUF");
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return 0;
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}
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if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
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if (display->format.num_planes != buf.length) {
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fprintf(stderr, "Wrong number of planes returned by "
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"QUERYBUF\n");
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return 0;
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}
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for (i = 0; i < buf.length; ++i)
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buffer->data_offsets[i] = buf.m.planes[i].data_offset;
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}
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return 1;
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}
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static void
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buffer_release(void *data, struct wl_buffer *buffer)
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{
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struct buffer *mybuf = data;
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mybuf->busy = 0;
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if (!queue(mybuf->display, mybuf))
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running = false;
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}
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static const struct wl_buffer_listener buffer_listener = {
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buffer_release
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};
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static unsigned int
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set_format(struct display *display, uint32_t format)
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{
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struct v4l2_format fmt;
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char buf[4];
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CLEAR(fmt);
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fmt.type = display->format.type;
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if (xioctl(display->v4l_fd, VIDIOC_G_FMT, &fmt) == -1) {
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perror("VIDIOC_G_FMT");
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return 0;
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}
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/* No need to set the format if it already is the one we want */
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if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
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fmt.fmt.pix.pixelformat == format)
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return 1;
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if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE &&
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fmt.fmt.pix_mp.pixelformat == format)
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return fmt.fmt.pix_mp.num_planes;
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if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
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fmt.fmt.pix.pixelformat = format;
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else
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fmt.fmt.pix_mp.pixelformat = format;
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if (xioctl(display->v4l_fd, VIDIOC_S_FMT, &fmt) == -1) {
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perror("VIDIOC_S_FMT");
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return 0;
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}
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if ((display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
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fmt.fmt.pix.pixelformat != format) ||
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(display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE &&
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fmt.fmt.pix_mp.pixelformat != format)) {
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fprintf(stderr, "Failed to set format to %.4s\n",
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dump_format(format, buf));
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return 0;
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}
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if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
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return fmt.fmt.pix_mp.num_planes;
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return 1;
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}
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static int
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v4l_connect(struct display *display, const char *dev_name)
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{
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struct v4l2_capability cap;
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struct v4l2_requestbuffers req;
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unsigned int num_planes;
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display->v4l_fd = open(dev_name, O_RDWR);
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if (display->v4l_fd < 0) {
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perror(dev_name);
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return 0;
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}
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if (xioctl(display->v4l_fd, VIDIOC_QUERYCAP, &cap) == -1) {
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if (errno == EINVAL) {
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fprintf(stderr, "%s is no V4L2 device\n", dev_name);
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} else {
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perror("VIDIOC_QUERYCAP");
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}
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return 0;
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}
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if (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)
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display->format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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else if (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE)
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display->format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
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else {
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fprintf(stderr, "%s is no video capture device\n", dev_name);
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return 0;
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}
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if (!(cap.capabilities & V4L2_CAP_STREAMING)) {
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fprintf(stderr, "%s does not support dmabuf i/o\n", dev_name);
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return 0;
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}
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/* Select video input, video standard and tune here */
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num_planes = set_format(display, display->format.format);
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if (num_planes < 1)
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return 0;
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CLEAR(req);
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req.type = display->format.type;
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req.memory = V4L2_MEMORY_MMAP;
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req.count = NUM_BUFFERS * num_planes;
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if (xioctl(display->v4l_fd, VIDIOC_REQBUFS, &req) == -1) {
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if (errno == EINVAL) {
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fprintf(stderr, "%s does not support dmabuf\n",
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dev_name);
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} else {
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perror("VIDIOC_REQBUFS");
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}
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return 0;
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}
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if (req.count < NUM_BUFFERS * num_planes) {
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fprintf(stderr, "Insufficient buffer memory on %s\n", dev_name);
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return 0;
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}
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printf("Created %d buffers\n", req.count);
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return 1;
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}
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static void
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v4l_shutdown(struct display *display)
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{
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close(display->v4l_fd);
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}
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static void
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create_succeeded(void *data,
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struct zwp_linux_buffer_params_v1 *params,
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struct wl_buffer *new_buffer)
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{
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struct buffer *buffer = data;
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unsigned i;
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buffer->buffer = new_buffer;
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wl_buffer_add_listener(buffer->buffer, &buffer_listener, buffer);
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zwp_linux_buffer_params_v1_destroy(params);
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for (i = 0; i < buffer->display->format.num_planes; ++i)
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close(buffer->dmabuf_fds[i]);
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}
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static void
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create_failed(void *data, struct zwp_linux_buffer_params_v1 *params)
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{
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struct buffer *buffer = data;
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unsigned i;
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buffer->buffer = NULL;
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zwp_linux_buffer_params_v1_destroy(params);
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for (i = 0; i < buffer->display->format.num_planes; ++i)
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close(buffer->dmabuf_fds[i]);
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running = false;
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fprintf(stderr, "Error: zwp_linux_buffer_params.create failed.\n");
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}
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static const struct zwp_linux_buffer_params_v1_listener params_listener = {
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create_succeeded,
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create_failed
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};
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static void
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create_dmabuf_buffer(struct display *display, struct buffer *buffer)
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{
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struct zwp_linux_buffer_params_v1 *params;
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uint64_t modifier;
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uint32_t flags;
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unsigned i;
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modifier = 0;
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flags = ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT;
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params = zwp_linux_dmabuf_v1_create_params(display->dmabuf);
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for (i = 0; i < display->format.num_planes; ++i)
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zwp_linux_buffer_params_v1_add(params,
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buffer->dmabuf_fds[i],
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i, /* plane_idx */
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buffer->data_offsets[i], /* offset */
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display->format.strides[i],
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modifier >> 32,
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modifier & 0xffffffff);
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zwp_linux_buffer_params_v1_add_listener(params, ¶ms_listener,
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buffer);
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zwp_linux_buffer_params_v1_create(params,
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display->format.width,
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display->format.height,
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display->drm_format,
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flags);
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}
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static int
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buffer_export(struct display *display, int index, int dmafd[])
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{
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struct v4l2_exportbuffer expbuf;
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unsigned i;
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CLEAR(expbuf);
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for (i = 0; i < display->format.num_planes; ++i) {
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expbuf.type = display->format.type;
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expbuf.index = index;
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expbuf.plane = i;
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if (xioctl(display->v4l_fd, VIDIOC_EXPBUF, &expbuf) == -1) {
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perror("VIDIOC_EXPBUF");
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while (i)
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close(dmafd[--i]);
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return 0;
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}
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dmafd[i] = expbuf.fd;
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}
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return 1;
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}
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static int
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queue_initial_buffers(struct display *display,
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struct buffer buffers[NUM_BUFFERS])
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{
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struct buffer *buffer;
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int index;
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for (index = 0; index < NUM_BUFFERS; ++index) {
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buffer = &buffers[index];
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buffer->display = display;
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buffer->index = index;
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if (!queue(display, buffer)) {
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fprintf(stderr, "Failed to queue buffer\n");
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return 0;
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}
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assert(!buffer->buffer);
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if (!buffer_export(display, index, buffer->dmabuf_fds))
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return 0;
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create_dmabuf_buffer(display, buffer);
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}
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return 1;
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}
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static int
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dequeue(struct display *display)
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{
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struct v4l2_buffer buf;
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struct v4l2_plane planes[VIDEO_MAX_PLANES];
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CLEAR(buf);
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buf.type = display->format.type;
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buf.memory = V4L2_MEMORY_MMAP;
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buf.length = VIDEO_MAX_PLANES;
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buf.m.planes = planes;
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/* This ioctl is blocking until a buffer is ready to be displayed */
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||||
if (xioctl(display->v4l_fd, VIDIOC_DQBUF, &buf) == -1) {
|
||||
perror("VIDIOC_DQBUF");
|
||||
return -1;
|
||||
}
|
||||
|
||||
assert(buf.flags & V4L2_BUF_FLAG_DONE);
|
||||
|
||||
return buf.index;
|
||||
}
|
||||
|
||||
static int
|
||||
fill_buffer_format(struct display *display)
|
||||
{
|
||||
struct v4l2_format fmt;
|
||||
struct v4l2_pix_format *pix;
|
||||
struct v4l2_pix_format_mplane *pix_mp;
|
||||
int i;
|
||||
char buf[4];
|
||||
|
||||
CLEAR(fmt);
|
||||
fmt.type = display->format.type;
|
||||
|
||||
/* Preserve original settings as set by v4l2-ctl for example */
|
||||
if (xioctl(display->v4l_fd, VIDIOC_G_FMT, &fmt) == -1) {
|
||||
perror("VIDIOC_G_FMT");
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
|
||||
pix = &fmt.fmt.pix;
|
||||
|
||||
printf("%d×%d, %.4s\n", pix->width, pix->height,
|
||||
dump_format(pix->pixelformat, buf));
|
||||
|
||||
display->format.num_planes = 1;
|
||||
display->format.width = pix->width;
|
||||
display->format.height = pix->height;
|
||||
display->format.strides[0] = pix->bytesperline;
|
||||
} else {
|
||||
pix_mp = &fmt.fmt.pix_mp;
|
||||
|
||||
display->format.num_planes = pix_mp->num_planes;
|
||||
display->format.width = pix_mp->width;
|
||||
display->format.height = pix_mp->height;
|
||||
|
||||
for (i = 0; i < pix_mp->num_planes; ++i)
|
||||
display->format.strides[i] = pix_mp->plane_fmt[i].bytesperline;
|
||||
|
||||
printf("%d×%d, %.4s, %d planes\n",
|
||||
pix_mp->width, pix_mp->height,
|
||||
dump_format(pix_mp->pixelformat, buf),
|
||||
pix_mp->num_planes);
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
v4l_init(struct display *display, struct buffer buffers[NUM_BUFFERS]) {
|
||||
if (!fill_buffer_format(display)) {
|
||||
fprintf(stderr, "Failed to fill buffer format\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (!queue_initial_buffers(display, buffers)) {
|
||||
fprintf(stderr, "Failed to queue initial buffers\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
start_capture(struct display *display)
|
||||
{
|
||||
int type = display->format.type;
|
||||
|
||||
if (xioctl(display->v4l_fd, VIDIOC_STREAMON, &type) == -1) {
|
||||
perror("VIDIOC_STREAMON");
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static void
|
||||
handle_configure(void *data, struct xdg_surface *surface,
|
||||
int32_t width, int32_t height,
|
||||
struct wl_array *states, uint32_t serial)
|
||||
{
|
||||
}
|
||||
|
||||
static void
|
||||
handle_delete(void *data, struct xdg_surface *xdg_surface)
|
||||
{
|
||||
running = false;
|
||||
}
|
||||
|
||||
static const struct xdg_surface_listener xdg_surface_listener = {
|
||||
handle_configure,
|
||||
handle_delete,
|
||||
};
|
||||
|
||||
static struct window *
|
||||
create_window(struct display *display)
|
||||
{
|
||||
struct window *window;
|
||||
|
||||
window = calloc(1, sizeof *window);
|
||||
if (!window)
|
||||
return NULL;
|
||||
|
||||
window->callback = NULL;
|
||||
window->display = display;
|
||||
window->surface = wl_compositor_create_surface(display->compositor);
|
||||
|
||||
if (display->shell) {
|
||||
window->xdg_surface =
|
||||
xdg_shell_get_xdg_surface(display->shell,
|
||||
window->surface);
|
||||
|
||||
assert(window->xdg_surface);
|
||||
|
||||
xdg_surface_add_listener(window->xdg_surface,
|
||||
&xdg_surface_listener, window);
|
||||
|
||||
xdg_surface_set_title(window->xdg_surface, "simple-dmabuf-v4l");
|
||||
} else if (display->fshell) {
|
||||
zwp_fullscreen_shell_v1_present_surface(display->fshell,
|
||||
window->surface,
|
||||
ZWP_FULLSCREEN_SHELL_V1_PRESENT_METHOD_DEFAULT,
|
||||
NULL);
|
||||
} else {
|
||||
assert(0);
|
||||
}
|
||||
|
||||
return window;
|
||||
}
|
||||
|
||||
static void
|
||||
destroy_window(struct window *window)
|
||||
{
|
||||
int i;
|
||||
unsigned j;
|
||||
|
||||
if (window->callback)
|
||||
wl_callback_destroy(window->callback);
|
||||
|
||||
if (window->xdg_surface)
|
||||
xdg_surface_destroy(window->xdg_surface);
|
||||
wl_surface_destroy(window->surface);
|
||||
|
||||
for (i = 0; i < NUM_BUFFERS; i++) {
|
||||
if (!window->buffers[i].buffer)
|
||||
continue;
|
||||
|
||||
wl_buffer_destroy(window->buffers[i].buffer);
|
||||
for (j = 0; j < window->display->format.num_planes; ++j)
|
||||
close(window->buffers[i].dmabuf_fds[j]);
|
||||
}
|
||||
|
||||
v4l_shutdown(window->display);
|
||||
|
||||
free(window);
|
||||
}
|
||||
|
||||
static const struct wl_callback_listener frame_listener;
|
||||
|
||||
static void
|
||||
redraw(void *data, struct wl_callback *callback, uint32_t time)
|
||||
{
|
||||
struct window *window = data;
|
||||
struct buffer *buffer;
|
||||
int index, num_busy = 0;
|
||||
|
||||
/* Check for a deadlock situation where we would block forever trying
|
||||
* to dequeue a buffer while all of them are locked by the compositor.
|
||||
*/
|
||||
for (index = 0; index < NUM_BUFFERS; ++index)
|
||||
if (window->buffers[index].busy)
|
||||
++num_busy;
|
||||
|
||||
/* A robust application would just postpone redraw until it has queued
|
||||
* a buffer.
|
||||
*/
|
||||
assert(num_busy < NUM_BUFFERS);
|
||||
|
||||
index = dequeue(window->display);
|
||||
if (index < 0) {
|
||||
/* We couldn’t get any buffer out of the camera, exiting. */
|
||||
running = false;
|
||||
return;
|
||||
}
|
||||
|
||||
buffer = &window->buffers[index];
|
||||
assert(!buffer->busy);
|
||||
|
||||
wl_surface_attach(window->surface, buffer->buffer, 0, 0);
|
||||
wl_surface_damage(window->surface, 0, 0,
|
||||
window->display->format.width,
|
||||
window->display->format.height);
|
||||
|
||||
if (callback)
|
||||
wl_callback_destroy(callback);
|
||||
|
||||
window->callback = wl_surface_frame(window->surface);
|
||||
wl_callback_add_listener(window->callback, &frame_listener, window);
|
||||
wl_surface_commit(window->surface);
|
||||
buffer->busy = 1;
|
||||
}
|
||||
|
||||
static const struct wl_callback_listener frame_listener = {
|
||||
redraw
|
||||
};
|
||||
|
||||
static void
|
||||
dmabuf_format(void *data, struct zwp_linux_dmabuf_v1 *zwp_linux_dmabuf,
|
||||
uint32_t format)
|
||||
{
|
||||
struct display *d = data;
|
||||
|
||||
if (format == d->drm_format)
|
||||
d->requested_format_found = true;
|
||||
}
|
||||
|
||||
static const struct zwp_linux_dmabuf_v1_listener dmabuf_listener = {
|
||||
dmabuf_format
|
||||
};
|
||||
|
||||
static void
|
||||
keyboard_handle_keymap(void *data, struct wl_keyboard *keyboard,
|
||||
uint32_t format, int fd, uint32_t size)
|
||||
{
|
||||
/* Just so we don’t leak the keymap fd */
|
||||
close(fd);
|
||||
}
|
||||
|
||||
static void
|
||||
keyboard_handle_enter(void *data, struct wl_keyboard *keyboard,
|
||||
uint32_t serial, struct wl_surface *surface,
|
||||
struct wl_array *keys)
|
||||
{
|
||||
}
|
||||
|
||||
static void
|
||||
keyboard_handle_leave(void *data, struct wl_keyboard *keyboard,
|
||||
uint32_t serial, struct wl_surface *surface)
|
||||
{
|
||||
}
|
||||
|
||||
static void
|
||||
keyboard_handle_key(void *data, struct wl_keyboard *keyboard,
|
||||
uint32_t serial, uint32_t time, uint32_t key,
|
||||
uint32_t state)
|
||||
{
|
||||
struct display *d = data;
|
||||
|
||||
if (!d->shell)
|
||||
return;
|
||||
|
||||
if (key == KEY_ESC && state)
|
||||
running = false;
|
||||
}
|
||||
|
||||
static void
|
||||
keyboard_handle_modifiers(void *data, struct wl_keyboard *keyboard,
|
||||
uint32_t serial, uint32_t mods_depressed,
|
||||
uint32_t mods_latched, uint32_t mods_locked,
|
||||
uint32_t group)
|
||||
{
|
||||
}
|
||||
|
||||
static const struct wl_keyboard_listener keyboard_listener = {
|
||||
keyboard_handle_keymap,
|
||||
keyboard_handle_enter,
|
||||
keyboard_handle_leave,
|
||||
keyboard_handle_key,
|
||||
keyboard_handle_modifiers,
|
||||
};
|
||||
|
||||
static void
|
||||
seat_handle_capabilities(void *data, struct wl_seat *seat,
|
||||
enum wl_seat_capability caps)
|
||||
{
|
||||
struct display *d = data;
|
||||
|
||||
if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !d->keyboard) {
|
||||
d->keyboard = wl_seat_get_keyboard(seat);
|
||||
wl_keyboard_add_listener(d->keyboard, &keyboard_listener, d);
|
||||
} else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && d->keyboard) {
|
||||
wl_keyboard_destroy(d->keyboard);
|
||||
d->keyboard = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static const struct wl_seat_listener seat_listener = {
|
||||
seat_handle_capabilities,
|
||||
};
|
||||
|
||||
static void
|
||||
xdg_shell_ping(void *data, struct xdg_shell *shell, uint32_t serial)
|
||||
{
|
||||
xdg_shell_pong(shell, serial);
|
||||
}
|
||||
|
||||
static const struct xdg_shell_listener xdg_shell_listener = {
|
||||
xdg_shell_ping,
|
||||
};
|
||||
|
||||
#define XDG_VERSION 5 /* The version of xdg-shell that we implement */
|
||||
#ifdef static_assert
|
||||
static_assert(XDG_VERSION == XDG_SHELL_VERSION_CURRENT,
|
||||
"Interface version doesn't match implementation version");
|
||||
#endif
|
||||
|
||||
static void
|
||||
registry_handle_global(void *data, struct wl_registry *registry,
|
||||
uint32_t id, const char *interface, uint32_t version)
|
||||
{
|
||||
struct display *d = data;
|
||||
|
||||
if (strcmp(interface, "wl_compositor") == 0) {
|
||||
d->compositor =
|
||||
wl_registry_bind(registry,
|
||||
id, &wl_compositor_interface, 1);
|
||||
} else if (strcmp(interface, "wl_seat") == 0) {
|
||||
d->seat = wl_registry_bind(registry,
|
||||
id, &wl_seat_interface, 1);
|
||||
wl_seat_add_listener(d->seat, &seat_listener, d);
|
||||
} else if (strcmp(interface, "xdg_shell") == 0) {
|
||||
d->shell = wl_registry_bind(registry,
|
||||
id, &xdg_shell_interface, 1);
|
||||
xdg_shell_use_unstable_version(d->shell, XDG_VERSION);
|
||||
xdg_shell_add_listener(d->shell, &xdg_shell_listener, d);
|
||||
} else if (strcmp(interface, "zwp_fullscreen_shell_v1") == 0) {
|
||||
d->fshell = wl_registry_bind(registry,
|
||||
id, &zwp_fullscreen_shell_v1_interface,
|
||||
1);
|
||||
} else if (strcmp(interface, "zwp_linux_dmabuf_v1") == 0) {
|
||||
d->dmabuf = wl_registry_bind(registry,
|
||||
id, &zwp_linux_dmabuf_v1_interface,
|
||||
1);
|
||||
zwp_linux_dmabuf_v1_add_listener(d->dmabuf, &dmabuf_listener,
|
||||
d);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
registry_handle_global_remove(void *data, struct wl_registry *registry,
|
||||
uint32_t name)
|
||||
{
|
||||
}
|
||||
|
||||
static const struct wl_registry_listener registry_listener = {
|
||||
registry_handle_global,
|
||||
registry_handle_global_remove
|
||||
};
|
||||
|
||||
static struct display *
|
||||
create_display(uint32_t requested_format)
|
||||
{
|
||||
struct display *display;
|
||||
|
||||
display = malloc(sizeof *display);
|
||||
if (display == NULL) {
|
||||
fprintf(stderr, "out of memory\n");
|
||||
exit(1);
|
||||
}
|
||||
display->display = wl_display_connect(NULL);
|
||||
assert(display->display);
|
||||
|
||||
display->drm_format = requested_format;
|
||||
|
||||
display->registry = wl_display_get_registry(display->display);
|
||||
wl_registry_add_listener(display->registry,
|
||||
®istry_listener, display);
|
||||
wl_display_roundtrip(display->display);
|
||||
if (display->dmabuf == NULL) {
|
||||
fprintf(stderr, "No zwp_linux_dmabuf global\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
wl_display_roundtrip(display->display);
|
||||
|
||||
/* XXX: fake, because the compositor does not yet advertise anything */
|
||||
display->requested_format_found = true;
|
||||
|
||||
if (!display->requested_format_found) {
|
||||
fprintf(stderr, "DRM_FORMAT_YUYV not available\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
return display;
|
||||
}
|
||||
|
||||
static void
|
||||
destroy_display(struct display *display)
|
||||
{
|
||||
if (display->dmabuf)
|
||||
zwp_linux_dmabuf_v1_destroy(display->dmabuf);
|
||||
|
||||
if (display->shell)
|
||||
xdg_shell_destroy(display->shell);
|
||||
|
||||
if (display->fshell)
|
||||
zwp_fullscreen_shell_v1_release(display->fshell);
|
||||
|
||||
if (display->compositor)
|
||||
wl_compositor_destroy(display->compositor);
|
||||
|
||||
wl_registry_destroy(display->registry);
|
||||
wl_display_flush(display->display);
|
||||
wl_display_disconnect(display->display);
|
||||
free(display);
|
||||
}
|
||||
|
||||
static void
|
||||
usage(const char *argv0)
|
||||
{
|
||||
printf("Usage: %s [V4L2 device] [V4L2 format] [DRM format]\n"
|
||||
"\n"
|
||||
"The default V4L2 device is /dev/video0\n"
|
||||
"\n"
|
||||
"Both formats are FOURCC values (see http://fourcc.org/)\n"
|
||||
"V4L2 formats are defined in <linux/videodev2.h>\n"
|
||||
"DRM formats are defined in <libdrm/drm_fourcc.h>\n"
|
||||
"The default for both formats is YUYV.\n"
|
||||
"If the V4L2 and DRM formats differ, the data is simply "
|
||||
"reinterpreted rather than converted.\n", argv0);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
static void
|
||||
signal_int(int signum)
|
||||
{
|
||||
running = false;
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
struct sigaction sigint;
|
||||
struct display *display;
|
||||
struct window *window;
|
||||
const char *v4l_device;
|
||||
uint32_t v4l_format, drm_format;
|
||||
int ret = 0;
|
||||
|
||||
if (argc < 2) {
|
||||
v4l_device = "/dev/video0";
|
||||
} else if (!strcmp(argv[1], "--help")) {
|
||||
usage(argv[0]);
|
||||
} else {
|
||||
v4l_device = argv[1];
|
||||
}
|
||||
|
||||
if (argc < 3)
|
||||
v4l_format = parse_format("YUYV");
|
||||
else
|
||||
v4l_format = parse_format(argv[2]);
|
||||
|
||||
if (argc < 4)
|
||||
drm_format = v4l_format;
|
||||
else
|
||||
drm_format = parse_format(argv[3]);
|
||||
|
||||
display = create_display(drm_format);
|
||||
display->format.format = v4l_format;
|
||||
|
||||
window = create_window(display);
|
||||
if (!window)
|
||||
return 1;
|
||||
|
||||
if (!v4l_connect(display, v4l_device))
|
||||
return 1;
|
||||
|
||||
if (!v4l_init(display, window->buffers))
|
||||
return 1;
|
||||
|
||||
sigint.sa_handler = signal_int;
|
||||
sigemptyset(&sigint.sa_mask);
|
||||
sigint.sa_flags = SA_RESETHAND;
|
||||
sigaction(SIGINT, &sigint, NULL);
|
||||
|
||||
/* Here we retrieve the linux-dmabuf objects, or error */
|
||||
wl_display_roundtrip(display->display);
|
||||
|
||||
/* In case of error, running will be 0 */
|
||||
if (!running)
|
||||
return 1;
|
||||
|
||||
/* We got all of our buffers, we can start the capture! */
|
||||
if (!start_capture(display))
|
||||
return 1;
|
||||
|
||||
redraw(window, NULL, 0);
|
||||
|
||||
while (running && ret != -1)
|
||||
ret = wl_display_dispatch(display->display);
|
||||
|
||||
fprintf(stderr, "simple-dmabuf-v4l exiting\n");
|
||||
destroy_window(window);
|
||||
destroy_display(display);
|
||||
|
||||
return 0;
|
||||
}
|
||||
14
configure.ac
14
configure.ac
@ -356,6 +356,20 @@ if ! test "x$enable_simple_dmabuf_intel_client" = "xno"; then
|
||||
fi
|
||||
AM_CONDITIONAL(BUILD_SIMPLE_DMABUF_INTEL_CLIENT, test "x$enable_simple_dmabuf_intel_client" = "xyes")
|
||||
|
||||
AC_ARG_ENABLE(simple-dmabuf-v4l-client,
|
||||
AS_HELP_STRING([--disable-simple-dmabuf-v4l-client],
|
||||
[do not build the simple dmabuf v4l client]),,
|
||||
enable_simple_dmabuf_v4l_client="auto")
|
||||
if ! test "x$enable_simple_dmabuf_v4l_client" = "xno"; then
|
||||
PKG_CHECK_MODULES(SIMPLE_DMABUF_V4L_CLIENT, [wayland-client libdrm],
|
||||
have_simple_dmabuf_v4l_client=yes, have_simple_dmabuf_v4l_client=no)
|
||||
if test "x$have_simple_dmabuf_v4l_client" = "xno" -a "x$enable_simple_dmabuf_v4l_client" = "xyes"; then
|
||||
AC_MSG_ERROR([V4L dmabuf client explicitly enabled, but libdrm couldn't be found])
|
||||
fi
|
||||
enable_simple_dmabuf_v4l_client="$have_simple_dmabuf_v4l_client"
|
||||
fi
|
||||
AM_CONDITIONAL(BUILD_SIMPLE_DMABUF_V4L_CLIENT, test "x$enable_simple_dmabuf_v4l_client" = "xyes")
|
||||
|
||||
AC_ARG_ENABLE(clients, [ --enable-clients],, enable_clients=yes)
|
||||
AM_CONDITIONAL(BUILD_CLIENTS, test x$enable_clients = xyes)
|
||||
if test x$enable_clients = xyes; then
|
||||
|
||||
Loading…
Reference in New Issue
Block a user