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-rw-r--r--capture_kms.c225
1 files changed, 0 insertions, 225 deletions
diff --git a/capture_kms.c b/capture_kms.c
deleted file mode 100644
index fa46bd3..0000000
--- a/capture_kms.c
+++ /dev/null
@@ -1,225 +0,0 @@
-/*
- * Copyright (C) 2023 Mikhail Burakov. This file is part of streamer.
- *
- * streamer is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * streamer is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with streamer. If not, see <https://www.gnu.org/licenses/>.
- */
-
-#include "capture_kms.h"
-
-#include <assert.h>
-#include <errno.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/timerfd.h>
-#include <time.h>
-#include <unistd.h>
-#include <xf86drm.h>
-
-#include "gpu.h"
-#include "toolbox/utils.h"
-
-static const int kCapturePeriod = 1000000000 / 60;
-
-struct CaptureContextKms {
- struct GpuContext* gpu_context;
- const struct CaptureContextCallbacks* callbacks;
- void* user;
-
- int drm_fd;
- uint32_t crtc_id;
- int timer_fd;
-};
-
-static int OpenAnyModule(void) {
- static const char* const modules[] = {
- "i915",
- "amdgpu",
- };
- for (size_t i = 0; i < LENGTH(modules); i++) {
- int drm_fd = drmOpen(modules[i], NULL);
- if (drm_fd >= 0) return drm_fd;
- LOG("Failed to open %s (%s)", modules[i], strerror(errno));
- }
- return -1;
-}
-
-static bool GetCrtcFb(int drm_fd, uint32_t crtc_id,
- struct drm_mode_fb_cmd2* drm_mode_fb_cmd2) {
- struct drm_mode_crtc drm_mode_crtc = {
- .crtc_id = crtc_id,
- };
- if (drmIoctl(drm_fd, DRM_IOCTL_MODE_GETCRTC, &drm_mode_crtc)) {
- LOG("Failed to get crtc %u (%s)", crtc_id, strerror(errno));
- return false;
- }
- if (!drm_mode_crtc.fb_id) {
- LOG("Crtc %u has no framebuffer", crtc_id);
- return false;
- }
-
- struct drm_mode_fb_cmd2 result = {
- .fb_id = drm_mode_crtc.fb_id,
- };
- if (drmIoctl(drm_fd, DRM_IOCTL_MODE_GETFB2, &result)) {
- LOG("Failed to get framebuffer %u (%s)", drm_mode_crtc.fb_id,
- strerror(errno));
- return false;
- }
- if (!result.handles[0]) {
- LOG("Framebuffer %u has no handles", drm_mode_crtc.fb_id);
- return false;
- }
-
- if (drm_mode_fb_cmd2) *drm_mode_fb_cmd2 = result;
- return true;
-}
-
-struct CaptureContextKms* CaptureContextKmsCreate(
- struct GpuContext* gpu_context,
- const struct CaptureContextCallbacks* callbacks, void* user) {
- struct CaptureContextKms* capture_context =
- malloc(sizeof(struct CaptureContextKms));
- if (!capture_context) {
- LOG("Failed to allocate capture context (%s)", strerror(errno));
- return NULL;
- }
- *capture_context = (struct CaptureContextKms){
- .gpu_context = gpu_context,
- .callbacks = callbacks,
- .user = user,
- .drm_fd = -1,
- .timer_fd = -1,
- };
-
- capture_context->drm_fd = OpenAnyModule();
- if (capture_context->drm_fd == -1) {
- LOG("Failed to open any module");
- goto rollback_capture_context;
- }
-
- uint32_t crtc_ids[16];
- struct drm_mode_card_res drm_mode_card_res = {
- .crtc_id_ptr = (uintptr_t)crtc_ids,
- .count_crtcs = LENGTH(crtc_ids),
- };
- if (drmIoctl(capture_context->drm_fd, DRM_IOCTL_MODE_GETRESOURCES,
- &drm_mode_card_res)) {
- LOG("Failed to get drm mode resources (%s)", strerror(errno));
- goto rollback_drm_fd;
- }
- for (size_t i = 0; i < drm_mode_card_res.count_crtcs; i++) {
- if (GetCrtcFb(capture_context->drm_fd, crtc_ids[i], NULL)) {
- LOG("Capturing crtc %u", crtc_ids[i]);
- capture_context->crtc_id = crtc_ids[i];
- break;
- }
- }
- if (!capture_context->crtc_id) {
- LOG("Nothing to capture");
- goto rollback_drm_fd;
- }
-
- capture_context->timer_fd = timerfd_create(CLOCK_MONOTONIC, 0);
- if (capture_context->timer_fd == -1) {
- LOG("Failed to create timer (%s)", strerror(errno));
- goto rollback_drm_fd;
- }
- static const struct itimerspec kTimerSpec = {
- .it_interval.tv_nsec = kCapturePeriod,
- .it_value.tv_nsec = kCapturePeriod,
- };
- if (timerfd_settime(capture_context->timer_fd, 0, &kTimerSpec, NULL)) {
- LOG("Failed to arm timer (%s)", strerror(errno));
- goto rollback_timer_fd;
- }
- return capture_context;
-
-rollback_timer_fd:
- close(capture_context->timer_fd);
-rollback_drm_fd:
- drmClose(capture_context->drm_fd);
-rollback_capture_context:
- free(capture_context);
- return NULL;
-}
-
-int CaptureContextKmsGetEventsFd(struct CaptureContextKms* capture_context) {
- return capture_context->timer_fd;
-}
-
-bool CaptureContextKmsProcessEvents(struct CaptureContextKms* capture_context) {
- uint64_t expirations;
- if (read(capture_context->timer_fd, &expirations, sizeof(expirations)) !=
- sizeof(expirations)) {
- LOG("Failed to read timer expirations (%s)", strerror(errno));
- return false;
- }
-
- struct drm_mode_fb_cmd2 drm_mode_fb_cmd2;
- if (!GetCrtcFb(capture_context->drm_fd, capture_context->crtc_id,
- &drm_mode_fb_cmd2)) {
- return false;
- }
-
- struct GpuFramePlane planes[] = {
- {.dmabuf_fd = -1},
- {.dmabuf_fd = -1},
- {.dmabuf_fd = -1},
- {.dmabuf_fd = -1},
- };
- static_assert(LENGTH(planes) == LENGTH(drm_mode_fb_cmd2.handles),
- "Suspicious drm_mode_fb_cmd2 structure");
-
- size_t nplanes = 0;
- for (; nplanes < LENGTH(planes); nplanes++) {
- if (!drm_mode_fb_cmd2.handles[nplanes]) break;
- int status = drmPrimeHandleToFD(capture_context->drm_fd,
- drm_mode_fb_cmd2.handles[nplanes], 0,
- &planes[nplanes].dmabuf_fd);
- if (status) {
- LOG("Failed to get dmabuf fd (%d)", status);
- goto release_planes;
- }
- planes[nplanes].offset = drm_mode_fb_cmd2.offsets[nplanes];
- planes[nplanes].pitch = drm_mode_fb_cmd2.pitches[nplanes];
- planes[nplanes].modifier = drm_mode_fb_cmd2.modifier[nplanes];
- }
-
- struct GpuFrame* gpu_frame = GpuContextCreateFrame(
- capture_context->gpu_context, drm_mode_fb_cmd2.width,
- drm_mode_fb_cmd2.height, drm_mode_fb_cmd2.pixel_format, nplanes, planes);
- if (!gpu_frame) {
- LOG("Failed to create gpu frame");
- goto release_planes;
- }
-
- // mburakov: Capture context might get destroyed in callback.
- struct GpuContext* gpu_context = capture_context->gpu_context;
- capture_context->callbacks->OnFrameReady(capture_context->user, gpu_frame);
- GpuContextDestroyFrame(gpu_context, gpu_frame);
- return true;
-
-release_planes:
- CloseUniqueFds((int[]){planes[0].dmabuf_fd, planes[1].dmabuf_fd,
- planes[2].dmabuf_fd, planes[3].dmabuf_fd});
- return false;
-}
-
-void CaptureContextKmsDestroy(struct CaptureContextKms* capture_context) {
- close(capture_context->timer_fd);
- drmClose(capture_context->drm_fd);
- free(capture_context);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-16 20:28:09 +0000