From 5d43af3e8888f18a4982d980b8c760d9726a9a92 Mon Sep 17 00:00:00 2001 From: Emmanuel Gil Peyrot Date: Mon, 11 Jan 2016 19:04:38 +0000 Subject: [PATCH] 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 Acked-by: Derek Foreman Tested-by: Derek Foreman Maniphest Tasks: T90 Differential Revision: https://phabricator.freedesktop.org/D339 --- .gitignore | 1 + Makefile.am | 15 + clients/simple-dmabuf-v4l.c | 945 ++++++++++++++++++++++++++++++++++++ configure.ac | 14 + 4 files changed, 975 insertions(+) create mode 100644 clients/simple-dmabuf-v4l.c diff --git a/.gitignore b/.gitignore index 719054d7..dfbb4d30 100644 --- a/.gitignore +++ b/.gitignore @@ -67,6 +67,7 @@ weston-presentation-shm weston-resizor weston-scaler weston-simple-dmabuf-intel +weston-simple-dmabuf-v4l weston-simple-egl weston-simple-shm weston-simple-touch diff --git a/Makefile.am b/Makefile.am index 1eb66aeb..623621da 100644 --- a/Makefile.am +++ b/Makefile.am @@ -538,6 +538,21 @@ weston_simple_dmabuf_intel_LDADD = $(SIMPLE_DMABUF_INTEL_CLIENT_LIBS) libshared. BUILT_SOURCES += protocol/linux-dmabuf-unstable-v1-client-protocol.h endif +if BUILD_SIMPLE_DMABUF_V4L_CLIENT +demo_clients += weston-simple-dmabuf-v4l +weston_simple_dmabuf_v4l_SOURCES = clients/simple-dmabuf-v4l.c +nodist_weston_simple_dmabuf_v4l_SOURCES = \ + protocol/xdg-shell-unstable-v5-protocol.c \ + protocol/xdg-shell-unstable-v5-client-protocol.h \ + protocol/fullscreen-shell-unstable-v1-protocol.c \ + protocol/fullscreen-shell-unstable-v1-client-protocol.h \ + protocol/linux-dmabuf-unstable-v1-protocol.c \ + protocol/linux-dmabuf-unstable-v1-client-protocol.h +weston_simple_dmabuf_v4l_CFLAGS = $(AM_CFLAGS) $(SIMPLE_DMABUF_V4L_CLIENT_CFLAGS) +weston_simple_dmabuf_v4l_LDADD = $(SIMPLE_DMABUF_V4L_CLIENT_LIBS) libshared.la +BUILT_SOURCES += protocol/linux-dmabuf-unstable-v1-client-protocol.h +endif + noinst_LTLIBRARIES += libtoytoolkit.la libtoytoolkit_la_SOURCES = \ diff --git a/clients/simple-dmabuf-v4l.c b/clients/simple-dmabuf-v4l.c new file mode 100644 index 00000000..2334e099 --- /dev/null +++ b/clients/simple-dmabuf-v4l.c @@ -0,0 +1,945 @@ +/* + * Copyright © 2015 Collabora Ltd. + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include +#include +#include +#include + +#include +#include "xdg-shell-unstable-v5-client-protocol.h" +#include "fullscreen-shell-unstable-v1-client-protocol.h" +#include "linux-dmabuf-unstable-v1-client-protocol.h" + +#define CLEAR(x) memset(&(x), 0, sizeof(x)) + +static int +xioctl(int fh, int request, void *arg) +{ + int r; + + do { + r = ioctl(fh, request, arg); + } while (r == -1 && errno == EINTR); + + return r; +} + +static uint32_t +parse_format(const char fmt[4]) +{ + return fourcc_code(fmt[0], fmt[1], fmt[2], fmt[3]); +} + +static inline const char * +dump_format(uint32_t format, char out[4]) +{ +#if BYTE_ORDER == BIG_ENDIAN + format = __builtin_bswap32(format); +#endif + memcpy(out, &format, 4); + return out; +} + +struct buffer_format { + int width; + int height; + enum v4l2_buf_type type; + uint32_t format; + + unsigned num_planes; + unsigned strides[VIDEO_MAX_PLANES]; +}; + +struct display { + struct wl_display *display; + struct wl_registry *registry; + struct wl_compositor *compositor; + struct wl_seat *seat; + struct wl_keyboard *keyboard; + struct xdg_shell *shell; + struct zwp_fullscreen_shell_v1 *fshell; + struct zwp_linux_dmabuf_v1 *dmabuf; + bool requested_format_found; + + int v4l_fd; + struct buffer_format format; + uint32_t drm_format; +}; + +struct buffer { + struct wl_buffer *buffer; + struct display *display; + int busy; + int index; + + int dmabuf_fds[VIDEO_MAX_PLANES]; + int data_offsets[VIDEO_MAX_PLANES]; +}; + +#define NUM_BUFFERS 3 + +struct window { + struct display *display; + struct wl_surface *surface; + struct xdg_surface *xdg_surface; + struct buffer buffers[NUM_BUFFERS]; + struct wl_callback *callback; +}; + +static bool running = true; + +static int +queue(struct display *display, struct buffer *buffer) +{ + struct v4l2_buffer buf; + struct v4l2_plane planes[VIDEO_MAX_PLANES]; + unsigned i; + + CLEAR(buf); + buf.type = display->format.type; + buf.memory = V4L2_MEMORY_MMAP; + buf.index = buffer->index; + + if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { + CLEAR(planes); + buf.length = VIDEO_MAX_PLANES; + buf.m.planes = planes; + } + + if (xioctl(display->v4l_fd, VIDIOC_QUERYBUF, &buf) == -1) { + perror("VIDIOC_QUERYBUF"); + return 0; + } + + if (xioctl(display->v4l_fd, VIDIOC_QBUF, &buf) == -1) { + perror("VIDIOC_QBUF"); + return 0; + } + + if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { + if (display->format.num_planes != buf.length) { + fprintf(stderr, "Wrong number of planes returned by " + "QUERYBUF\n"); + return 0; + } + + for (i = 0; i < buf.length; ++i) + buffer->data_offsets[i] = buf.m.planes[i].data_offset; + } + + return 1; +} + +static void +buffer_release(void *data, struct wl_buffer *buffer) +{ + struct buffer *mybuf = data; + + mybuf->busy = 0; + + if (!queue(mybuf->display, mybuf)) + running = false; +} + +static const struct wl_buffer_listener buffer_listener = { + buffer_release +}; + +static unsigned int +set_format(struct display *display, uint32_t format) +{ + struct v4l2_format fmt; + char buf[4]; + + CLEAR(fmt); + + fmt.type = display->format.type; + + if (xioctl(display->v4l_fd, VIDIOC_G_FMT, &fmt) == -1) { + perror("VIDIOC_G_FMT"); + return 0; + } + + /* No need to set the format if it already is the one we want */ + if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE && + fmt.fmt.pix.pixelformat == format) + return 1; + if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE && + fmt.fmt.pix_mp.pixelformat == format) + return fmt.fmt.pix_mp.num_planes; + + if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) + fmt.fmt.pix.pixelformat = format; + else + fmt.fmt.pix_mp.pixelformat = format; + + if (xioctl(display->v4l_fd, VIDIOC_S_FMT, &fmt) == -1) { + perror("VIDIOC_S_FMT"); + return 0; + } + + if ((display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE && + fmt.fmt.pix.pixelformat != format) || + (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE && + fmt.fmt.pix_mp.pixelformat != format)) { + fprintf(stderr, "Failed to set format to %.4s\n", + dump_format(format, buf)); + return 0; + } + + if (display->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) + return fmt.fmt.pix_mp.num_planes; + + return 1; +} + +static int +v4l_connect(struct display *display, const char *dev_name) +{ + struct v4l2_capability cap; + struct v4l2_requestbuffers req; + unsigned int num_planes; + + display->v4l_fd = open(dev_name, O_RDWR); + if (display->v4l_fd < 0) { + perror(dev_name); + return 0; + } + + if (xioctl(display->v4l_fd, VIDIOC_QUERYCAP, &cap) == -1) { + if (errno == EINVAL) { + fprintf(stderr, "%s is no V4L2 device\n", dev_name); + } else { + perror("VIDIOC_QUERYCAP"); + } + return 0; + } + + if (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) + display->format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + else if (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE) + display->format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; + else { + fprintf(stderr, "%s is no video capture device\n", dev_name); + return 0; + } + + if (!(cap.capabilities & V4L2_CAP_STREAMING)) { + fprintf(stderr, "%s does not support dmabuf i/o\n", dev_name); + return 0; + } + + /* Select video input, video standard and tune here */ + + num_planes = set_format(display, display->format.format); + if (num_planes < 1) + return 0; + + CLEAR(req); + + req.type = display->format.type; + req.memory = V4L2_MEMORY_MMAP; + req.count = NUM_BUFFERS * num_planes; + + if (xioctl(display->v4l_fd, VIDIOC_REQBUFS, &req) == -1) { + if (errno == EINVAL) { + fprintf(stderr, "%s does not support dmabuf\n", + dev_name); + } else { + perror("VIDIOC_REQBUFS"); + } + return 0; + } + + if (req.count < NUM_BUFFERS * num_planes) { + fprintf(stderr, "Insufficient buffer memory on %s\n", dev_name); + return 0; + } + + printf("Created %d buffers\n", req.count); + + return 1; +} + +static void +v4l_shutdown(struct display *display) +{ + close(display->v4l_fd); +} + +static void +create_succeeded(void *data, + struct zwp_linux_buffer_params_v1 *params, + struct wl_buffer *new_buffer) +{ + struct buffer *buffer = data; + unsigned i; + + buffer->buffer = new_buffer; + wl_buffer_add_listener(buffer->buffer, &buffer_listener, buffer); + + zwp_linux_buffer_params_v1_destroy(params); + + for (i = 0; i < buffer->display->format.num_planes; ++i) + close(buffer->dmabuf_fds[i]); +} + +static void +create_failed(void *data, struct zwp_linux_buffer_params_v1 *params) +{ + struct buffer *buffer = data; + unsigned i; + + buffer->buffer = NULL; + + zwp_linux_buffer_params_v1_destroy(params); + + for (i = 0; i < buffer->display->format.num_planes; ++i) + close(buffer->dmabuf_fds[i]); + + running = false; + + fprintf(stderr, "Error: zwp_linux_buffer_params.create failed.\n"); +} + +static const struct zwp_linux_buffer_params_v1_listener params_listener = { + create_succeeded, + create_failed +}; + +static void +create_dmabuf_buffer(struct display *display, struct buffer *buffer) +{ + struct zwp_linux_buffer_params_v1 *params; + uint64_t modifier; + uint32_t flags; + unsigned i; + + modifier = 0; + flags = ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT; + + params = zwp_linux_dmabuf_v1_create_params(display->dmabuf); + for (i = 0; i < display->format.num_planes; ++i) + zwp_linux_buffer_params_v1_add(params, + buffer->dmabuf_fds[i], + i, /* plane_idx */ + buffer->data_offsets[i], /* offset */ + display->format.strides[i], + modifier >> 32, + modifier & 0xffffffff); + zwp_linux_buffer_params_v1_add_listener(params, ¶ms_listener, + buffer); + zwp_linux_buffer_params_v1_create(params, + display->format.width, + display->format.height, + display->drm_format, + flags); +} + +static int +buffer_export(struct display *display, int index, int dmafd[]) +{ + struct v4l2_exportbuffer expbuf; + unsigned i; + + CLEAR(expbuf); + + for (i = 0; i < display->format.num_planes; ++i) { + expbuf.type = display->format.type; + expbuf.index = index; + expbuf.plane = i; + if (xioctl(display->v4l_fd, VIDIOC_EXPBUF, &expbuf) == -1) { + perror("VIDIOC_EXPBUF"); + while (i) + close(dmafd[--i]); + return 0; + } + dmafd[i] = expbuf.fd; + } + + return 1; +} + +static int +queue_initial_buffers(struct display *display, + struct buffer buffers[NUM_BUFFERS]) +{ + struct buffer *buffer; + int index; + + for (index = 0; index < NUM_BUFFERS; ++index) { + buffer = &buffers[index]; + buffer->display = display; + buffer->index = index; + + if (!queue(display, buffer)) { + fprintf(stderr, "Failed to queue buffer\n"); + return 0; + } + + assert(!buffer->buffer); + if (!buffer_export(display, index, buffer->dmabuf_fds)) + return 0; + + create_dmabuf_buffer(display, buffer); + } + + return 1; +} + +static int +dequeue(struct display *display) +{ + struct v4l2_buffer buf; + struct v4l2_plane planes[VIDEO_MAX_PLANES]; + + CLEAR(buf); + buf.type = display->format.type; + buf.memory = V4L2_MEMORY_MMAP; + buf.length = VIDEO_MAX_PLANES; + buf.m.planes = planes; + + /* This ioctl is blocking until a buffer is ready to be displayed */ + 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 \n" + "DRM formats are defined in \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; +} diff --git a/configure.ac b/configure.ac index 24a9de22..97cbfe51 100644 --- a/configure.ac +++ b/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