diff options
Diffstat (limited to 'clients/simple-dmabuf-v4l.c')
| -rw-r--r-- | clients/simple-dmabuf-v4l.c | 1001 |
1 files changed, 0 insertions, 1001 deletions
diff --git a/clients/simple-dmabuf-v4l.c b/clients/simple-dmabuf-v4l.c deleted file mode 100644 index ecdc6c3c..00000000 --- a/clients/simple-dmabuf-v4l.c +++ /dev/null @@ -1,1001 +0,0 @@ -/* - * Copyright © 2015 Collabora Ltd. - * - * Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation the rights to use, copy, modify, merge, publish, - * distribute, sublicense, and/or sell copies of the Software, and to - * permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice (including the - * next paragraph) shall be included in all copies or substantial - * portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -#include "config.h" - -#include <stdint.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <stdbool.h> -#include <assert.h> -#include <unistd.h> -#include <sys/mman.h> -#include <signal.h> -#include <fcntl.h> - -#include <drm_fourcc.h> - -#include <sys/mman.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <errno.h> -#include <linux/videodev2.h> -#include <linux/input.h> - -#include <wayland-client.h> -#include <libweston/zalloc.h> -#include "xdg-shell-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 void -redraw(void *data, struct wl_callback *callback, uint32_t time); - -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_wm_base *wm_base; - 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 xdg_toplevel *xdg_toplevel; - struct buffer buffers[NUM_BUFFERS]; - struct wl_callback *callback; - bool wait_for_configure; - bool initialized; -}; - -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 = 0; - - /* XXX: apparently some webcams may actually provide y-inverted images, - * in which case we should set - * 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; - } - - 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 -xdg_surface_handle_configure(void *data, struct xdg_surface *surface, - uint32_t serial) -{ - struct window *window = data; - - xdg_surface_ack_configure(surface, serial); - - if (window->initialized && window->wait_for_configure) - redraw(window, NULL, 0); - window->wait_for_configure = false; -} - -static const struct xdg_surface_listener xdg_surface_listener = { - xdg_surface_handle_configure, -}; - -static void -xdg_toplevel_handle_configure(void *data, struct xdg_toplevel *toplevel, - int32_t width, int32_t height, - struct wl_array *states) -{ -} - -static void -xdg_toplevel_handle_close(void *data, struct xdg_toplevel *xdg_toplevel) -{ - running = 0; -} - -static const struct xdg_toplevel_listener xdg_toplevel_listener = { - xdg_toplevel_handle_configure, - xdg_toplevel_handle_close, -}; - -static struct window * -create_window(struct display *display) -{ - struct window *window; - - window = zalloc(sizeof *window); - if (!window) - return NULL; - - window->callback = NULL; - window->display = display; - window->surface = wl_compositor_create_surface(display->compositor); - - if (display->wm_base) { - window->xdg_surface = - xdg_wm_base_get_xdg_surface(display->wm_base, - window->surface); - - assert(window->xdg_surface); - - xdg_surface_add_listener(window->xdg_surface, - &xdg_surface_listener, window); - - window->xdg_toplevel = - xdg_surface_get_toplevel(window->xdg_surface); - - assert(window->xdg_toplevel); - - xdg_toplevel_add_listener(window->xdg_toplevel, - &xdg_toplevel_listener, window); - - xdg_toplevel_set_title(window->xdg_toplevel, "simple-dmabuf-v4l"); - - window->wait_for_configure = true; - wl_surface_commit(window->surface); - } 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_toplevel) - xdg_toplevel_destroy(window->xdg_toplevel); - 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->wm_base) - 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_wm_base_ping(void *data, struct xdg_wm_base *shell, uint32_t serial) -{ - xdg_wm_base_pong(shell, serial); -} - -static const struct xdg_wm_base_listener wm_base_listener = { - xdg_wm_base_ping, -}; - -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_wm_base") == 0) { - d->wm_base = wl_registry_bind(registry, - id, &xdg_wm_base_interface, 1); - xdg_wm_base_add_listener(d->wm_base, &wm_base_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->wm_base) - xdg_wm_base_destroy(display->wm_base); - - 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); - - printf("\n" - "How to set up Vivid the virtual video driver for testing:\n" - "- build your kernel with CONFIG_VIDEO_VIVID=m\n" - "- add this to a /etc/modprobe.d/ file:\n" - " options vivid node_types=0x1 num_inputs=1 input_types=0x00\n" - "- modprobe vivid and check which device was created,\n" - " here we assume /dev/video0\n" - "- set the pixel format:\n" - " $ v4l2-ctl -d /dev/video0 --set-fmt-video=width=640,pixelformat=XR24\n" - "- launch the demo:\n" - " $ %s /dev/video0 XR24 XR24\n" - "You should see a test pattern with color bars, and some text.\n" - "\n" - "More about vivid: https://www.kernel.org/doc/Documentation/video4linux/vivid.txt\n" - "\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; - - window->initialized = true; - - if (!window->wait_for_configure) - 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; -} |