vo_opengl: prefix per-backend source files with context_

1 files changed, 439 insertions, 0 deletions

diff --git a/video/out/opengl/context_drm_egl.c b/video/out/opengl/context_drm_egl.c
new file mode 100644
index 0000000000..34029a1a34
--- /dev/null
+++ b/video/out/opengl/context_drm_egl.c
@@ -0,0 +1,439 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpv 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 mpv.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * You can alternatively redistribute this file and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/poll.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <gbm.h>
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <GL/gl.h>
+
+#include "context.h"
+#include "common/common.h"
+#include "video/out/drm_common.h"
+
+#define USE_MASTER 0
+
+struct framebuffer
+{
+    struct gbm_bo *bo;
+    int width, height;
+    int fd;
+    int id;
+};
+
+struct gbm
+{
+    struct gbm_surface *surface;
+    struct gbm_device *device;
+    struct gbm_bo *bo;
+    struct gbm_bo *next_bo;
+};
+
+struct egl
+{
+    EGLDisplay display;
+    EGLContext context;
+    EGLSurface surface;
+};
+
+struct priv {
+    struct kms *kms;
+
+    drmEventContext ev;
+    drmModeCrtc *old_crtc;
+
+    struct egl egl;
+    struct gbm gbm;
+    struct framebuffer fb;
+
+    bool active;
+    bool waiting_for_flip;
+
+    bool vt_switcher_active;
+    struct vt_switcher vt_switcher;
+};
+
+static EGLConfig select_fb_config_egl(struct MPGLContext *ctx, bool es)
+{
+    struct priv *p = ctx->priv;
+    const EGLint attributes[] = {
+        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+        EGL_RED_SIZE, 8,
+        EGL_GREEN_SIZE, 8,
+        EGL_BLUE_SIZE, 8,
+        EGL_ALPHA_SIZE, 0,
+        EGL_DEPTH_SIZE, 1,
+        EGL_RENDERABLE_TYPE, es ? EGL_OPENGL_ES2_BIT : EGL_OPENGL_BIT,
+        EGL_NONE
+    };
+    EGLint config_count;
+    EGLConfig config;
+    if (!eglChooseConfig(p->egl.display, attributes, &config, 1, &config_count)) {
+        MP_FATAL(ctx->vo, "Failed to configure EGL.\n");
+        return NULL;
+    }
+    if (!config_count) {
+        MP_FATAL(ctx->vo, "Could not find EGL configuration!\n");
+        return NULL;
+    }
+    return config;
+}
+
+static bool init_egl(struct MPGLContext *ctx, bool es)
+{
+    struct priv *p = ctx->priv;
+    MP_VERBOSE(ctx->vo, "Initializing EGL\n");
+    p->egl.display = eglGetDisplay(p->gbm.device);
+    if (p->egl.display == EGL_NO_DISPLAY) {
+        MP_ERR(ctx->vo, "Failed to get EGL display.\n");
+        return false;
+    }
+    if (!eglInitialize(p->egl.display, NULL, NULL)) {
+        MP_ERR(ctx->vo, "Failed to initialize EGL.\n");
+        return false;
+    }
+    if (!eglBindAPI(es ? EGL_OPENGL_ES_API : EGL_OPENGL_API)) {
+        MP_ERR(ctx->vo, "Failed to set EGL API version.\n");
+        return false;
+    }
+    EGLConfig config = select_fb_config_egl(ctx, es);
+    if (!config) {
+        MP_ERR(ctx->vo, "Failed to configure EGL.\n");
+        return false;
+    }
+    p->egl.context = eglCreateContext(p->egl.display, config, EGL_NO_CONTEXT, NULL);
+    if (!p->egl.context) {
+        MP_ERR(ctx->vo, "Failed to create EGL context.\n");
+        return false;
+    }
+    MP_VERBOSE(ctx->vo, "Initializing EGL surface\n");
+    p->egl.surface = eglCreateWindowSurface(p->egl.display, config, p->gbm.surface, NULL);
+    if (p->egl.surface == EGL_NO_SURFACE) {
+        MP_ERR(ctx->vo, "Failed to create EGL surface.\n");
+        return false;
+    }
+    return true;
+}
+
+static bool init_gbm(struct MPGLContext *ctx)
+{
+    struct priv *p = ctx->priv;
+    MP_VERBOSE(ctx->vo, "Creating GBM device\n");
+    p->gbm.device = gbm_create_device(p->kms->fd);
+    if (!p->gbm.device) {
+        MP_ERR(ctx->vo, "Failed to create GBM device.\n");
+        return false;
+    }
+
+    MP_VERBOSE(ctx->vo, "Initializing GBM surface (%d x %d)\n",
+        p->kms->mode.hdisplay, p->kms->mode.vdisplay);
+    p->gbm.surface = gbm_surface_create(
+        p->gbm.device,
+        p->kms->mode.hdisplay,
+        p->kms->mode.vdisplay,
+        GBM_BO_FORMAT_XRGB8888,
+        GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
+    if (!p->gbm.surface) {
+        MP_ERR(ctx->vo, "Failed to create GBM surface.\n");
+        return false;
+    }
+    return true;
+}
+
+static void framebuffer_destroy_callback(struct gbm_bo *bo, void *data)
+{
+    struct framebuffer *fb = data;
+    if (fb) {
+        drmModeRmFB(fb->fd, fb->id);
+    }
+}
+
+static void update_framebuffer_from_bo(
+    const struct MPGLContext *ctx, struct gbm_bo *bo)
+{
+    struct priv *p = ctx->priv;
+    p->fb.bo = bo;
+    p->fb.fd = p->kms->fd;
+    p->fb.width = gbm_bo_get_width(bo);
+    p->fb.height = gbm_bo_get_height(bo);
+    int stride = gbm_bo_get_stride(bo);
+    int handle = gbm_bo_get_handle(bo).u32;
+
+    int ret = drmModeAddFB(p->kms->fd, p->fb.width, p->fb.height,
+                       24, 32, stride, handle, &p->fb.id);
+    if (ret) {
+        MP_ERR(ctx->vo, "Failed to create framebuffer: %s\n", mp_strerror(errno));
+    }
+    gbm_bo_set_user_data(bo, &p->fb, framebuffer_destroy_callback);
+}
+
+static void page_flipped(int fd, unsigned int frame, unsigned int sec,
+                                 unsigned int usec, void *data)
+{
+    struct priv *p = data;
+    p->waiting_for_flip = false;
+}
+
+static bool crtc_setup(struct MPGLContext *ctx)
+{
+    struct priv *p = ctx->priv;
+    if (p->active)
+        return true;
+    p->old_crtc = drmModeGetCrtc(p->kms->fd, p->kms->crtc_id);
+    int ret = drmModeSetCrtc(p->kms->fd, p->kms->crtc_id,
+                             p->fb.id,
+                             0,
+                             0,
+                             &p->kms->connector->connector_id,
+                             1,
+                             &p->kms->mode);
+    p->active = true;
+    return ret == 0;
+}
+
+static void crtc_release(struct MPGLContext *ctx)
+{
+    struct priv *p = ctx->priv;
+
+    if (!p->active)
+        return;
+    p->active = false;
+
+    // wait for current page flip
+    while (p->waiting_for_flip) {
+        int ret = drmHandleEvent(p->kms->fd, &p->ev);
+        if (ret) {
+            MP_ERR(ctx->vo, "drmHandleEvent failed: %i\n", ret);
+            break;
+        }
+    }
+
+    if (p->old_crtc) {
+        drmModeSetCrtc(p->kms->fd,
+                       p->old_crtc->crtc_id,
+                       p->old_crtc->buffer_id,
+                       p->old_crtc->x,
+                       p->old_crtc->y,
+                       &p->kms->connector->connector_id,
+                       1,
+                       &p->old_crtc->mode);
+        drmModeFreeCrtc(p->old_crtc);
+        p->old_crtc = NULL;
+    }
+}
+
+static void release_vt(void *data)
+{
+    struct MPGLContext *ctx = data;
+    MP_VERBOSE(ctx->vo, "Releasing VT");
+    crtc_release(ctx);
+    if (USE_MASTER) {
+        //this function enables support for switching to x, weston etc.
+        //however, for whatever reason, it can be called only by root users.
+        //until things change, this is commented.
+        struct priv *p = ctx->priv;
+        if (drmDropMaster(p->kms->fd)) {
+            MP_WARN(ctx->vo, "Failed to drop DRM master: %s\n", mp_strerror(errno));
+        }
+    }
+}
+
+static void acquire_vt(void *data)
+{
+    struct MPGLContext *ctx = data;
+    MP_VERBOSE(ctx->vo, "Acquiring VT");
+    if (USE_MASTER) {
+        struct priv *p = ctx->priv;
+        if (drmSetMaster(p->kms->fd)) {
+            MP_WARN(ctx->vo, "Failed to acquire DRM master: %s\n", mp_strerror(errno));
+        }
+    }
+
+    crtc_setup(ctx);
+}
+
+static void drm_egl_uninit(MPGLContext *ctx)
+{
+    struct priv *p = ctx->priv;
+    crtc_release(ctx);
+
+    if (p->vt_switcher_active)
+        vt_switcher_destroy(&p->vt_switcher);
+
+    eglMakeCurrent(p->egl.display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    eglDestroyContext(p->egl.display, p->egl.context);
+    eglDestroySurface(p->egl.display, p->egl.surface);
+    gbm_surface_destroy(p->gbm.surface);
+    eglTerminate(p->egl.display);
+    gbm_device_destroy(p->gbm.device);
+    p->egl.context = EGL_NO_CONTEXT;
+    eglDestroyContext(p->egl.display, p->egl.context);
+
+    if (p->kms) {
+        kms_destroy(p->kms);
+        p->kms = 0;
+    }
+}
+
+static int drm_egl_init(struct MPGLContext *ctx, int flags)
+{
+    if (ctx->vo->probing) {
+        MP_VERBOSE(ctx->vo, "DRM EGL backend can be activated only manually.\n");
+        return -1;
+    }
+    struct priv *p = ctx->priv;
+    p->kms = NULL;
+    p->old_crtc = NULL;
+    p->gbm.surface = NULL;
+    p->gbm.device = NULL;
+    p->active = false;
+    p->waiting_for_flip = false;
+    p->ev.version = DRM_EVENT_CONTEXT_VERSION;
+    p->ev.page_flip_handler = page_flipped;
+
+    p->vt_switcher_active = vt_switcher_init(&p->vt_switcher, ctx->vo->log);
+    if (p->vt_switcher_active) {
+        vt_switcher_acquire(&p->vt_switcher, acquire_vt, ctx);
+        vt_switcher_release(&p->vt_switcher, release_vt, ctx);
+    } else {
+        MP_WARN(ctx->vo, "Failed to set up VT switcher. Terminal switching will be unavailable.\n");
+    }
+
+    MP_VERBOSE(ctx->vo, "Initializing KMS\n");
+    p->kms = kms_create(ctx->vo->log);
+    if (!p->kms) {
+        MP_ERR(ctx->vo, "Failed to create KMS.\n");
+        return -1;
+    }
+
+    // TODO: arguments should be configurable
+    if (!kms_setup(p->kms, "/dev/dri/card0", -1, 0)) {
+        MP_ERR(ctx->vo, "Failed to configure KMS.\n");
+        return -1;
+    }
+
+    if (!init_gbm(ctx)) {
+        MP_ERR(ctx->vo, "Failed to setup GBM.\n");
+        return -1;
+    }
+
+    if (!init_egl(ctx, flags & VOFLAG_GLES)) {
+        MP_ERR(ctx->vo, "Failed to setup EGL.\n");
+        return -1;
+    }
+
+    if (!eglMakeCurrent(p->egl.display, p->egl.surface, p->egl.surface, p->egl.context)) {
+        MP_ERR(ctx->vo, "Failed to make context current.\n");
+        return -1;
+    }
+
+    const char *egl_exts = eglQueryString(p->egl.display, EGL_EXTENSIONS);
+    void *(*gpa)(const GLubyte*) = (void *(*)(const GLubyte*))eglGetProcAddress;
+    mpgl_load_functions(ctx->gl, gpa, egl_exts, ctx->vo->log);
+
+    // required by gbm_surface_lock_front_buffer
+    eglSwapBuffers(p->egl.display, p->egl.surface);
+
+    MP_VERBOSE(ctx->vo, "Preparing framebuffer\n");
+    p->gbm.bo = gbm_surface_lock_front_buffer(p->gbm.surface);
+    if (!p->gbm.bo) {
+        MP_ERR(ctx->vo, "Failed to lock GBM surface.\n");
+        return -1;
+    }
+    update_framebuffer_from_bo(ctx, p->gbm.bo);
+    if (!p->fb.id) {
+        MP_ERR(ctx->vo, "Failed to create framebuffer.\n");
+        return -1;
+    }
+
+    if (!crtc_setup(ctx)) {
+        MP_ERR(
+               ctx->vo,
+               "Failed to set CRTC for connector %u: %s\n",
+               p->kms->connector->connector_id,
+               mp_strerror(errno));
+        return -1;
+    }
+
+    return 0;
+}
+
+static int drm_egl_reconfig(struct MPGLContext *ctx)
+{
+    struct priv *p = ctx->priv;
+    ctx->vo->dwidth = p->fb.width;
+    ctx->vo->dheight = p->fb.height;
+    return 0;
+}
+
+static int drm_egl_control(struct MPGLContext *ctx, int *events, int request,
+                           void *arg)
+{
+    return VO_NOTIMPL;
+}
+
+static void drm_egl_swap_buffers(MPGLContext *ctx)
+{
+    struct priv *p = ctx->priv;
+    eglSwapBuffers(p->egl.display, p->egl.surface);
+    p->gbm.next_bo = gbm_surface_lock_front_buffer(p->gbm.surface);
+    p->waiting_for_flip = true;
+    update_framebuffer_from_bo(ctx, p->gbm.next_bo);
+    int ret = drmModePageFlip(p->kms->fd, p->kms->crtc_id, p->fb.id,
+                              DRM_MODE_PAGE_FLIP_EVENT, p);
+    if (ret) {
+        MP_WARN(ctx->vo, "Failed to queue page flip: %s\n", mp_strerror(errno));
+    }
+
+    // poll page flip finish event
+    const int timeout_ms = 3000;
+    struct pollfd fds[1] = { { .events = POLLIN, .fd = p->kms->fd } };
+    poll(fds, 1, timeout_ms);
+    if (fds[0].revents & POLLIN) {
+        ret = drmHandleEvent(p->kms->fd, &p->ev);
+        if (ret != 0) {
+            MP_ERR(ctx->vo, "drmHandleEvent failed: %i\n", ret);
+            return;
+        }
+    }
+
+    gbm_surface_release_buffer(p->gbm.surface, p->gbm.bo);
+    p->gbm.bo = p->gbm.next_bo;
+}
+
+const struct mpgl_driver mpgl_driver_drm_egl = {
+    .name           = "drm-egl",
+    .priv_size      = sizeof(struct priv),
+    .init           = drm_egl_init,
+    .reconfig       = drm_egl_reconfig,
+    .swap_buffers   = drm_egl_swap_buffers,
+    .control        = drm_egl_control,
+    .uninit         = drm_egl_uninit,
+};