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gl: Add Mesa3D GBM backend

Browse source 
This makes it possible to use the GStreamer OpenGL elements without a
windowing system if a libdrm- and Mesa3D-supported GPU is present

https://bugzilla.gnome.org/show_bug.cgi?id=782923
This commit is contained in:
Carlos Rafael Giani 2018-02-23 19:59:45 +01:00 committed by Nicolas Dufresne
parent 79f9f9e600
commit 4df219f336
14 changed files with 1592 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
configure.ac
View file

@ -951,6 +951,7 @@ gst-libs/gst/gl/wayland/Makefile
gst-libs/gst/gl/win32/Makefile
gst-libs/gst/gl/x11/Makefile
gst-libs/gst/gl/viv-fb/Makefile
gst-libs/gst/gl/gbm/Makefile
gst-libs/gst/riff/Makefile
gst-libs/gst/rtp/Makefile
gst-libs/gst/rtsp/Makefile

5
gst-libs/gst/gl/Makefile.am
View file

@ -134,6 +134,11 @@ SUBDIRS += viv-fb
libgstgl_@GST_API_VERSION@_la_LIBADD += viv-fb/libgstgl-viv-fb.la
endif
if HAVE_WINDOW_GBM
SUBDIRS += gbm
libgstgl_@GST_API_VERSION@_la_LIBADD += gbm/libgstgl-gbm.la
endif
if USE_EGL
SUBDIRS += egl
libgstgl_@GST_API_VERSION@_la_LIBADD += egl/libgstgl-egl.la

8
gst-libs/gst/gl/egl/gstgldisplay_egl.c
View file

@ -149,6 +149,14 @@ gst_gl_display_egl_get_from_native (GstGLDisplayType type, guintptr display)
ret = _gst_eglGetPlatformDisplay (EGL_PLATFORM_WAYLAND, (gpointer) display,
NULL);
}
#endif
#if GST_GL_HAVE_WINDOW_GBM
if (ret == EGL_NO_DISPLAY && (type & GST_GL_DISPLAY_TYPE_GBM) &&
(gst_gl_check_extension ("EGL_MESA_platform_gbm", egl_exts) ||
gst_gl_check_extension ("EGL_MESA_platform_gbm", egl_exts))) {
ret = _gst_eglGetPlatformDisplay (EGL_PLATFORM_GBM_MESA, (gpointer) display,
NULL);
}
#endif
/* android only has one winsys/display connection */

31
gst-libs/gst/gl/gbm/Makefile.am Normal file
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@ -0,0 +1,31 @@
## Process this file with automake to produce Makefile.in
noinst_LTLIBRARIES = libgstgl-gbm.la
libgstgl_gbm_la_SOURCES = \
gstgl_gbm_utils.c \
gstgldisplay_gbm.c \
gstglwindow_gbm_egl.c
noinst_HEADERS = \
gstgl_gbm_utils.h \
gstgldisplay_gbm.h \
gstglwindow_gbm_egl.h
libgstgl_gbm_la_CFLAGS = \
-I$(top_srcdir)/gst-libs \
-I$(top_builddir)/gst-libs \
$(GL_CFLAGS) \
$(GST_PLUGINS_BASE_CFLAGS) \
$(GST_BASE_CFLAGS) \
$(GST_CFLAGS) \
$(DRM_CFLAGS) \
$(GBM_CFLAGS) \
$(G_UDEV_CFLAGS)
libgstgl_gbm_la_LDFLAGS = \
$(GST_LIB_LDFLAGS) \
$(GST_ALL_LDFLAGS) \
$(DRM_LIBS) \
$(GBM_LIBS) \
$(G_UDEV_LIBS)

529
gst-libs/gst/gl/gbm/gstgl_gbm_utils.c Normal file
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@ -0,0 +1,529 @@
/*
* GStreamer
* Copyright (C) 2018 Carlos Rafael Giani <dv@pseudoterminal.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <unistd.h>
#include <fcntl.h>
#include <gudev/gudev.h>
#include "gstgl_gbm_utils.h"
GST_DEBUG_CATEGORY_EXTERN (gst_gl_gbm_debug);
#define GST_CAT_DEFAULT gst_gl_gbm_debug
const gchar *
gst_gl_gbm_get_name_for_drm_connector (drmModeConnector * connector)
{
g_assert (connector != NULL);
switch (connector->connector_type) {
case DRM_MODE_CONNECTOR_Unknown:
return "Unknown";
case DRM_MODE_CONNECTOR_VGA:
return "VGA";
case DRM_MODE_CONNECTOR_DVII:
return "DVI-I";
case DRM_MODE_CONNECTOR_DVID:
return "DVI-D";
case DRM_MODE_CONNECTOR_DVIA:
return "DVI-A";
case DRM_MODE_CONNECTOR_Composite:
return "Composite";
case DRM_MODE_CONNECTOR_SVIDEO:
return "S-Video";
case DRM_MODE_CONNECTOR_LVDS:
return "LVDS";
case DRM_MODE_CONNECTOR_Component:
return "Component";
case DRM_MODE_CONNECTOR_9PinDIN:
return "9-Pin DIN";
case DRM_MODE_CONNECTOR_DisplayPort:
return "DisplayPort";
case DRM_MODE_CONNECTOR_HDMIA:
return "HDMI-A";
case DRM_MODE_CONNECTOR_HDMIB:
return "HDMI-B";
case DRM_MODE_CONNECTOR_TV:
return "TV";
case DRM_MODE_CONNECTOR_eDP:
return "eDP";
case DRM_MODE_CONNECTOR_VIRTUAL:
return "Virtual";
case DRM_MODE_CONNECTOR_DSI:
return "DSI";
default:
return "<unknown>";
}
}
const gchar *
gst_gl_gbm_get_name_for_drm_encoder (drmModeEncoder * encoder)
{
switch (encoder->encoder_type) {
case DRM_MODE_ENCODER_NONE:
return "none";
case DRM_MODE_ENCODER_DAC:
return "DAC";
case DRM_MODE_ENCODER_TMDS:
return "TMDS";
case DRM_MODE_ENCODER_LVDS:
return "LVDS";
case DRM_MODE_ENCODER_TVDAC:
return "TVDAC";
case DRM_MODE_ENCODER_VIRTUAL:
return "Virtual";
case DRM_MODE_ENCODER_DSI:
return "DSI";
default:
return "<unknown>";
}
}
const gchar *
gst_gl_gbm_format_to_string (guint32 format)
{
if (format == GBM_BO_FORMAT_XRGB8888)
format = GBM_FORMAT_XRGB8888;
if (format == GBM_BO_FORMAT_ARGB8888)
format = GBM_FORMAT_ARGB8888;
switch (format) {
case GBM_FORMAT_C8:
return "C8";
case GBM_FORMAT_RGB332:
return "RGB332";
case GBM_FORMAT_BGR233:
return "BGR233";
case GBM_FORMAT_NV12:
return "NV12";
case GBM_FORMAT_XRGB4444:
return "XRGB4444";
case GBM_FORMAT_XBGR4444:
return "XBGR4444";
case GBM_FORMAT_RGBX4444:
return "RGBX4444";
case GBM_FORMAT_BGRX4444:
return "BGRX4444";
case GBM_FORMAT_XRGB1555:
return "XRGB1555";
case GBM_FORMAT_XBGR1555:
return "XBGR1555";
case GBM_FORMAT_RGBX5551:
return "RGBX5551";
case GBM_FORMAT_BGRX5551:
return "BGRX5551";
case GBM_FORMAT_ARGB4444:
return "ARGB4444";
case GBM_FORMAT_ABGR4444:
return "ABGR4444";
case GBM_FORMAT_RGBA4444:
return "RGBA4444";
case GBM_FORMAT_BGRA4444:
return "BGRA4444";
case GBM_FORMAT_ARGB1555:
return "ARGB1555";
case GBM_FORMAT_ABGR1555:
return "ABGR1555";
case GBM_FORMAT_RGBA5551:
return "RGBA5551";
case GBM_FORMAT_BGRA5551:
return "BGRA5551";
case GBM_FORMAT_RGB565:
return "RGB565";
case GBM_FORMAT_BGR565:
return "BGR565";
case GBM_FORMAT_YUYV:
return "YUYV";
case GBM_FORMAT_YVYU:
return "YVYU";
case GBM_FORMAT_UYVY:
return "UYVY";
case GBM_FORMAT_VYUY:
return "VYUY";
case GBM_FORMAT_RGB888:
return "RGB888";
case GBM_FORMAT_BGR888:
return "BGR888";
case GBM_FORMAT_XRGB8888:
return "XRGB8888";
case GBM_FORMAT_XBGR8888:
return "XBGR8888";
case GBM_FORMAT_RGBX8888:
return "RGBX8888";
case GBM_FORMAT_BGRX8888:
return "BGRX8888";
case GBM_FORMAT_AYUV:
return "AYUV";
case GBM_FORMAT_XRGB2101010:
return "XRGB2101010";
case GBM_FORMAT_XBGR2101010:
return "XBGR2101010";
case GBM_FORMAT_RGBX1010102:
return "RGBX1010102";
case GBM_FORMAT_BGRX1010102:
return "BGRX1010102";
case GBM_FORMAT_ARGB8888:
return "ARGB8888";
case GBM_FORMAT_ABGR8888:
return "ABGR8888";
case GBM_FORMAT_RGBA8888:
return "RGBA8888";
case GBM_FORMAT_BGRA8888:
return "BGRA8888";
case GBM_FORMAT_ARGB2101010:
return "ARGB2101010";
case GBM_FORMAT_ABGR2101010:
return "ABGR2101010";
case GBM_FORMAT_RGBA1010102:
return "RGBA1010102";
case GBM_FORMAT_BGRA1010102:
return "BGRA1010102";
default:
return "<unknown>";
}
return NULL;
}
int
gst_gl_gbm_depth_from_format (guint32 format)
{
if (format == GBM_BO_FORMAT_XRGB8888)
format = GBM_FORMAT_XRGB8888;
if (format == GBM_BO_FORMAT_ARGB8888)
format = GBM_FORMAT_ARGB8888;
switch (format) {
case GBM_FORMAT_C8:
case GBM_FORMAT_RGB332:
case GBM_FORMAT_BGR233:
return 8;
case GBM_FORMAT_NV12:
case GBM_FORMAT_XRGB4444:
case GBM_FORMAT_XBGR4444:
case GBM_FORMAT_RGBX4444:
case GBM_FORMAT_BGRX4444:
return 12;
case GBM_FORMAT_XRGB1555:
case GBM_FORMAT_XBGR1555:
case GBM_FORMAT_RGBX5551:
case GBM_FORMAT_BGRX5551:
return 15;
case GBM_FORMAT_ARGB4444:
case GBM_FORMAT_ABGR4444:
case GBM_FORMAT_RGBA4444:
case GBM_FORMAT_BGRA4444:
case GBM_FORMAT_ARGB1555:
case GBM_FORMAT_ABGR1555:
case GBM_FORMAT_RGBA5551:
case GBM_FORMAT_BGRA5551:
case GBM_FORMAT_RGB565:
case GBM_FORMAT_BGR565:
case GBM_FORMAT_YUYV:
case GBM_FORMAT_YVYU:
case GBM_FORMAT_UYVY:
case GBM_FORMAT_VYUY:
return 16;
case GBM_FORMAT_RGB888:
case GBM_FORMAT_BGR888:
case GBM_FORMAT_XRGB8888:
case GBM_FORMAT_XBGR8888:
case GBM_FORMAT_RGBX8888:
case GBM_FORMAT_BGRX8888:
case GBM_FORMAT_AYUV:
return 24;
case GBM_FORMAT_XRGB2101010:
case GBM_FORMAT_XBGR2101010:
case GBM_FORMAT_RGBX1010102:
case GBM_FORMAT_BGRX1010102:
return 30;
case GBM_FORMAT_ARGB8888:
case GBM_FORMAT_ABGR8888:
case GBM_FORMAT_RGBA8888:
case GBM_FORMAT_BGRA8888:
case GBM_FORMAT_ARGB2101010:
case GBM_FORMAT_ABGR2101010:
case GBM_FORMAT_RGBA1010102:
case GBM_FORMAT_BGRA1010102:
return 32;
default:
GST_ERROR ("unknown GBM format %" G_GUINT32_FORMAT, format);
}
return 0;
}
int
gst_gl_gbm_bpp_from_format (guint32 format)
{
if (format == GBM_BO_FORMAT_XRGB8888)
format = GBM_FORMAT_XRGB8888;
if (format == GBM_BO_FORMAT_ARGB8888)
format = GBM_FORMAT_ARGB8888;
switch (format) {
case GBM_FORMAT_C8:
case GBM_FORMAT_RGB332:
case GBM_FORMAT_BGR233:
return 8;
case GBM_FORMAT_NV12:
return 12;
case GBM_FORMAT_XRGB4444:
case GBM_FORMAT_XBGR4444:
case GBM_FORMAT_RGBX4444:
case GBM_FORMAT_BGRX4444:
case GBM_FORMAT_ARGB4444:
case GBM_FORMAT_ABGR4444:
case GBM_FORMAT_RGBA4444:
case GBM_FORMAT_BGRA4444:
case GBM_FORMAT_XRGB1555:
case GBM_FORMAT_XBGR1555:
case GBM_FORMAT_RGBX5551:
case GBM_FORMAT_BGRX5551:
case GBM_FORMAT_ARGB1555:
case GBM_FORMAT_ABGR1555:
case GBM_FORMAT_RGBA5551:
case GBM_FORMAT_BGRA5551:
case GBM_FORMAT_RGB565:
case GBM_FORMAT_BGR565:
case GBM_FORMAT_YUYV:
case GBM_FORMAT_YVYU:
case GBM_FORMAT_UYVY:
case GBM_FORMAT_VYUY:
return 16;
case GBM_FORMAT_RGB888:
case GBM_FORMAT_BGR888:
return 24;
case GBM_FORMAT_XRGB8888:
case GBM_FORMAT_XBGR8888:
case GBM_FORMAT_RGBX8888:
case GBM_FORMAT_BGRX8888:
case GBM_FORMAT_ARGB8888:
case GBM_FORMAT_ABGR8888:
case GBM_FORMAT_RGBA8888:
case GBM_FORMAT_BGRA8888:
case GBM_FORMAT_XRGB2101010:
case GBM_FORMAT_XBGR2101010:
case GBM_FORMAT_RGBX1010102:
case GBM_FORMAT_BGRX1010102:
case GBM_FORMAT_ARGB2101010:
case GBM_FORMAT_ABGR2101010:
case GBM_FORMAT_RGBA1010102:
case GBM_FORMAT_BGRA1010102:
case GBM_FORMAT_AYUV:
return 32;
default:
GST_ERROR ("unknown GBM format %" G_GUINT32_FORMAT, format);
}
return 0;
}
static void
gst_gl_gbm_drm_fb_destroy_callback (struct gbm_bo *bo, void *data)
{
int drm_fd = gbm_device_get_fd (gbm_bo_get_device (bo));
GstGLDRMFramebuffer *fb = (GstGLDRMFramebuffer *) (data);
if (fb->fb_id)
drmModeRmFB (drm_fd, fb->fb_id);
g_slice_free1 (sizeof (GstGLDRMFramebuffer), fb);
}
GstGLDRMFramebuffer *
gst_gl_gbm_drm_fb_get_from_bo (struct gbm_bo *bo)
{
GstGLDRMFramebuffer *fb;
int drm_fd;
guint32 width, height, stride, format, handle;
int depth, bpp;
int ret;
/* We want to use this buffer object (abbr. "bo") as a scanout buffer.
* To that end, we associate the bo with the DRM by using drmModeAddFB().
* However, this needs to be called exactly once for the given bo, and the
* counterpart, drmModeRmFB(), needs to be called when the bo is cleaned up.
*
* To fulfill these requirements, add extra framebuffer information to the
* bo as "user data". This way, if this user data pointer is NULL, it means
* that no framebuffer information was generated yet & the bo was not set
* as a scanout buffer with drmModeAddFB() yet, and we have perform these
* steps. Otherwise, if it is non-NULL, we know we do not have to set up
* anything (since it was done already) and just return the pointer to the
* framebuffer information. */
fb = (GstGLDRMFramebuffer *) (gbm_bo_get_user_data (bo));
if (fb != NULL) {
/* The bo was already set up as a scanout framebuffer. Just
* return the framebuffer information. */
return fb;
}
/* If this point is reached, then we have to setup the bo as a
* scanout framebuffer. */
drm_fd = gbm_device_get_fd (gbm_bo_get_device (bo));
fb = g_slice_alloc0 (sizeof (GstGLDRMFramebuffer));
fb->bo = bo;
width = gbm_bo_get_width (bo);
height = gbm_bo_get_height (bo);
stride = gbm_bo_get_stride (bo);
format = gbm_bo_get_format (bo);
handle = gbm_bo_get_handle (bo).u32;
depth = gst_gl_gbm_depth_from_format (format);
bpp = gst_gl_gbm_bpp_from_format (format);
GST_DEBUG ("Attempting to add GBM BO as scanout framebuffer width/height: %"
G_GUINT32_FORMAT "/%" G_GUINT32_FORMAT " pixels stride: %"
G_GUINT32_FORMAT " bytes format: %s depth: %d bits total bpp: %d bits",
width, height, stride, gst_gl_gbm_format_to_string (format), depth, bpp);
/* Set the bo as a scanout framebuffer */
ret = drmModeAddFB (drm_fd, width, height, depth, bpp, stride, handle,
&fb->fb_id);
if (ret != 0) {
GST_ERROR ("Failed to add GBM BO as scanout framebuffer: %s (%d)",
g_strerror (errno), errno);
g_slice_free1 (sizeof (GstGLDRMFramebuffer), fb);
return NULL;
}
/* Add the framebuffer information to the bo as user data, and also install a callback
* that cleans up this extra information whenever the bo itself is discarded */
gbm_bo_set_user_data (bo, fb, gst_gl_gbm_drm_fb_destroy_callback);
return fb;
}
int
gst_gl_gbm_find_and_open_drm_node (void)
{
/* In here we use GUDev to try to autodetect the GPU */
int drm_fd = -1;
GUdevClient *gudev_client = NULL;
GUdevEnumerator *gudev_enum = NULL;
GList *devlist = NULL;
GList *deventry = NULL;
const gchar *subsystems[2] = { "drm", NULL };
gudev_client = g_udev_client_new (subsystems);
if (gudev_client == NULL) {
GST_ERROR ("Could not create gudev client");
goto cleanup;
}
GST_DEBUG ("Created gudev client");
gudev_enum = g_udev_enumerator_new (gudev_client);
if (gudev_enum == NULL) {
GST_ERROR ("Could not create gudev enumerator");
goto cleanup;
}
GST_DEBUG ("Created gudev enumerator");
/* TODO: To be 100% sure we pick the right device, also check
* if this is a GPU, because a pure scanout device could also
* have a DRM subsystem for example. However, currently it is
* unclear how to do that. By trying to create an EGL context? */
g_udev_enumerator_add_match_subsystem (gudev_enum, "drm");
devlist = g_udev_enumerator_execute (gudev_enum);
GST_DEBUG ("Scanned for udev devices with a drm subsytem");
if (devlist == NULL) {
GST_WARNING ("Found no matching DRM devices");
goto cleanup;
}
GST_DEBUG ("Got %u potentially matching device(s)", g_list_length (devlist));
for (deventry = devlist; deventry != NULL; deventry = deventry->next) {
GUdevDevice *gudevice = G_UDEV_DEVICE (deventry->data);
const gchar *devnode = g_udev_device_get_device_file (gudevice);
if ((devnode == NULL) || !g_str_has_prefix (devnode, "/dev/dri/card"))
continue;
GST_DEBUG ("Found DRM device with device node \"%s\"", devnode);
drm_fd = open (devnode, O_RDWR | O_CLOEXEC);
if (drm_fd < 0) {
GST_WARNING ("Cannot open device node \"%s\": %s (%d)", devnode,
g_strerror (errno), errno);
continue;
}
GST_DEBUG ("Device node \"%s\" is a valid DRM device node", devnode);
break;
}
done:
if (devlist != NULL) {
g_list_free_full (devlist, g_object_unref);
devlist = NULL;
GST_DEBUG ("Cleaned up device list");
}
if (gudev_enum != NULL) {
g_object_unref (G_OBJECT (gudev_enum));
gudev_enum = NULL;
GST_DEBUG ("Cleaned up gudev enumerator");
}
if (gudev_client != NULL) {
g_object_unref (G_OBJECT (gudev_client));
gudev_client = NULL;
GST_DEBUG ("Cleaned up gudev client");
}
return drm_fd;
cleanup:
if (drm_fd >= 0) {
close (drm_fd);
drm_fd = -1;
}
goto done;
}

49
gst-libs/gst/gl/gbm/gstgl_gbm_utils.h Normal file
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@ -0,0 +1,49 @@
/*
* GStreamer
* Copyright (C) 2018 Carlos Rafael Giani <dv@pseudoterminal.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_GL_GBM_PRIVATE_H__
#define __GST_GL_GBM_PRIVATE_H__
#include <gbm.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <gst/gst.h>
typedef struct _GstGLDRMFramebuffer GstGLDRMFramebuffer;
struct _GstGLDRMFramebuffer
{
struct gbm_bo *bo;
guint32 fb_id;
};
const gchar* gst_gl_gbm_get_name_for_drm_connector (drmModeConnector * connector);
const gchar* gst_gl_gbm_get_name_for_drm_encoder (drmModeEncoder * encoder);
const gchar* gst_gl_gbm_format_to_string (guint32 format);
int gst_gl_gbm_depth_from_format (guint32 format);
int gst_gl_gbm_bpp_from_format (guint32 format);
GstGLDRMFramebuffer* gst_gl_gbm_drm_fb_get_from_bo (struct gbm_bo *bo);
int gst_gl_gbm_find_and_open_drm_node (void);
#endif /* __GST_GL_DISPLAY_GBM_UTILS_H__ */

423
gst-libs/gst/gl/gbm/gstgldisplay_gbm.c Normal file
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@ -0,0 +1,423 @@
/*
* GStreamer
* Copyright (C) 2018 Carlos Rafael Giani <dv@pseudoterminal.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstgldisplay_gbm.h"
#include "gstgl_gbm_utils.h"
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
GST_DEBUG_CATEGORY (gst_gl_gbm_debug);
GST_DEBUG_CATEGORY_STATIC (gst_gl_display_debug);
#define GST_CAT_DEFAULT gst_gl_display_debug
#define INVALID_CRTC ((guint32)0)
G_DEFINE_TYPE (GstGLDisplayGBM, gst_gl_display_gbm, GST_TYPE_GL_DISPLAY);
static void gst_gl_display_gbm_finalize (GObject * object);
static guintptr gst_gl_display_gbm_get_handle (GstGLDisplay * display);
static guint32 gst_gl_gbm_find_crtc_id_for_encoder (GstGLDisplayGBM *
display_gbm, drmModeEncoder const *encoder);
static guint32 gst_gl_gbm_find_crtc_id_for_connector (GstGLDisplayGBM *
display_gbm);
static gboolean gst_gl_display_gbm_setup_drm (GstGLDisplayGBM * display_gbm);
static void gst_gl_display_gbm_shutdown_drm (GstGLDisplayGBM * display_gbm);
static gboolean gst_gl_display_gbm_setup_gbm (GstGLDisplayGBM * display_gbm);
static void gst_gl_display_gbm_shutdown_gbm (GstGLDisplayGBM * display_gbm);
static void
gst_gl_display_gbm_class_init (GstGLDisplayGBMClass * klass)
{
GST_GL_DISPLAY_CLASS (klass)->get_handle =
GST_DEBUG_FUNCPTR (gst_gl_display_gbm_get_handle);
G_OBJECT_CLASS (klass)->finalize = gst_gl_display_gbm_finalize;
}
static void
gst_gl_display_gbm_init (GstGLDisplayGBM * display_gbm)
{
GstGLDisplay *display = (GstGLDisplay *) display_gbm;
display->type = GST_GL_DISPLAY_TYPE_GBM;
display_gbm->drm_fd = -1;
}
static void
gst_gl_display_gbm_finalize (GObject * object)
{
GstGLDisplayGBM *display_gbm = GST_GL_DISPLAY_GBM (object);
gst_gl_display_gbm_shutdown_gbm (display_gbm);
gst_gl_display_gbm_shutdown_drm (display_gbm);
G_OBJECT_CLASS (gst_gl_display_gbm_parent_class)->finalize (object);
}
static guintptr
gst_gl_display_gbm_get_handle (GstGLDisplay * display)
{
return (guintptr) GST_GL_DISPLAY_GBM (display)->gbm_dev;
}
static guint32
gst_gl_gbm_find_crtc_id_for_encoder (GstGLDisplayGBM * display_gbm,
drmModeEncoder const *encoder)
{
int i;
for (i = 0; i < display_gbm->drm_mode_resources->count_crtcs; ++i) {
/* possible_crtcs is a bitmask as described here:
* https://dvdhrm.wordpress.com/2012/09/13/linux-drm-mode-setting-api */
guint32 const crtc_mask = 1 << i;
guint32 const crtc_id = display_gbm->drm_mode_resources->crtcs[i];
if (encoder->possible_crtcs & crtc_mask)
return crtc_id;
}
/* No match found */
return INVALID_CRTC;
}
static guint32
gst_gl_gbm_find_crtc_id_for_connector (GstGLDisplayGBM * display_gbm)
{
int i;
for (i = 0; i < display_gbm->drm_mode_connector->count_encoders; ++i) {
guint32 encoder_id = display_gbm->drm_mode_connector->encoders[i];
drmModeEncoder *encoder =
drmModeGetEncoder (display_gbm->drm_fd, encoder_id);
if (encoder != NULL) {
guint32 crtc_id =
gst_gl_gbm_find_crtc_id_for_encoder (display_gbm, encoder);
drmModeFreeEncoder (encoder);
if (crtc_id != INVALID_CRTC)
return crtc_id;
}
}
/* No match found */
return INVALID_CRTC;
}
static gboolean
gst_gl_display_gbm_setup_drm (GstGLDisplayGBM * display_gbm)
{
int i;
g_assert (display_gbm != NULL);
g_assert (display_gbm->drm_fd >= 0);
/* Get the DRM mode resources */
display_gbm->drm_mode_resources = drmModeGetResources (display_gbm->drm_fd);
if (display_gbm->drm_mode_resources == NULL) {
GST_ERROR ("Could not get DRM resources: %s (%d)", g_strerror (errno),
errno);
goto cleanup;
}
GST_DEBUG ("Got DRM resources");
/* Find a connected connector. The connector is where the pixel data is
* finally sent to, and typically connects to some form of display, like an
* HDMI TV, an LVDS panel etc. */
{
drmModeConnector *connector = NULL;
GST_DEBUG ("Checking %d DRM connector(s)",
display_gbm->drm_mode_resources->count_connectors);
for (i = 0; i < display_gbm->drm_mode_resources->count_connectors; ++i) {
connector = drmModeGetConnector (display_gbm->drm_fd,
display_gbm->drm_mode_resources->connectors[i]);
GST_DEBUG ("Found DRM connector #%d \"%s\" with ID %" G_GUINT32_FORMAT, i,
gst_gl_gbm_get_name_for_drm_connector (connector),
connector->connector_id);
if (connector->connection == DRM_MODE_CONNECTED) {
GST_DEBUG ("DRM connector #%d is connected", i);
break;
}
drmModeFreeConnector (connector);
connector = NULL;
}
if (connector == NULL) {
GST_ERROR ("No connected DRM connector found");
goto cleanup;
}
display_gbm->drm_mode_connector = connector;
}
/* Check out what modes are supported by the chosen connector,
* and pick either the "preferred" mode or the one with the largest
* pixel area. */
{
int selected_mode_index = -1;
int selected_mode_area = -1;
GST_DEBUG ("Checking %d DRM mode(s) from selected connector",
display_gbm->drm_mode_connector->count_modes);
for (i = 0; i < display_gbm->drm_mode_connector->count_modes; ++i) {
drmModeModeInfo *current_mode =
&(display_gbm->drm_mode_connector->modes[i]);
int current_mode_area = current_mode->hdisplay * current_mode->vdisplay;
GST_DEBUG ("Found DRM mode #%d width/height %" G_GUINT16_FORMAT "/%"
G_GUINT16_FORMAT " hsync/vsync start %" G_GUINT16_FORMAT "/%"
G_GUINT16_FORMAT " hsync/vsync end %" G_GUINT16_FORMAT "/%"
G_GUINT16_FORMAT " htotal/vtotal %" G_GUINT16_FORMAT "/%"
G_GUINT16_FORMAT " hskew %" G_GUINT16_FORMAT " vscan %"
G_GUINT16_FORMAT " vrefresh %" G_GUINT32_FORMAT " preferred %d", i,
current_mode->hdisplay, current_mode->vdisplay,
current_mode->hsync_start, current_mode->vsync_start,
current_mode->hsync_end, current_mode->vsync_end,
current_mode->htotal, current_mode->vtotal, current_mode->hskew,
current_mode->vscan, current_mode->vrefresh,
(current_mode->type & DRM_MODE_TYPE_PREFERRED) ? TRUE : FALSE);
if ((current_mode->type & DRM_MODE_TYPE_PREFERRED) ||
(current_mode_area > selected_mode_area)) {
display_gbm->drm_mode_info = current_mode;
selected_mode_area = current_mode_area;
selected_mode_index = i;
if (current_mode->type & DRM_MODE_TYPE_PREFERRED)
break;
}
}
if (display_gbm->drm_mode_info == NULL) {
GST_ERROR ("No usable DRM mode found");
goto cleanup;
}
GST_DEBUG ("Selected DRM mode #%d", selected_mode_index);
}
/* Find an encoder that is attached to the chosen connector. Also find the
* index/id of the CRTC associated with this encoder. The encoder takes pixel
* data from the CRTC and transmits it to the connector. The CRTC roughly
* represents the scanout framebuffer.
*
* Ultimately, we only care about the CRTC index & ID, so the encoder
* reference is discarded here once these are found. The CRTC index is the
* index in the m_drm_mode_resources' CRTC array, while the ID is an identifier
* used by the DRM to refer to the CRTC universally. (We need the CRTC
* information for page flipping and DRM scanout framebuffer configuration.) */
{
drmModeEncoder *encoder = NULL;
GST_DEBUG ("Checking %d DRM encoder(s)",
display_gbm->drm_mode_resources->count_encoders);
for (i = 0; i < display_gbm->drm_mode_resources->count_encoders; ++i) {
encoder = drmModeGetEncoder (display_gbm->drm_fd,
display_gbm->drm_mode_resources->encoders[i]);
GST_DEBUG ("Found DRM encoder #%d \"%s\"", i,
gst_gl_gbm_get_name_for_drm_encoder (encoder));
if (encoder->encoder_id == display_gbm->drm_mode_connector->encoder_id) {
GST_DEBUG ("DRM encoder #%d corresponds to selected DRM connector "
"-> selected", i);
break;
}
drmModeFreeEncoder (encoder);
encoder = NULL;
}
if (encoder == NULL) {
GST_DEBUG ("No encoder found; searching for CRTC ID in the connector");
display_gbm->crtc_id =
gst_gl_gbm_find_crtc_id_for_connector (display_gbm);
} else {
GST_DEBUG ("Using CRTC ID from selected encoder");
display_gbm->crtc_id = encoder->crtc_id;
drmModeFreeEncoder (encoder);
}
if (display_gbm->crtc_id == INVALID_CRTC) {
GST_ERROR ("No CRTC found");
goto cleanup;
}
GST_DEBUG ("CRTC with ID %" G_GUINT32_FORMAT " found; now locating it in "
"the DRM mode resources CRTC array", display_gbm->crtc_id);
for (i = 0; i < display_gbm->drm_mode_resources->count_crtcs; ++i) {
if (display_gbm->drm_mode_resources->crtcs[i] == display_gbm->crtc_id) {
display_gbm->crtc_index = i;
break;
}
}
if (display_gbm->crtc_index < 0) {
GST_ERROR ("No matching CRTC entry in DRM resources found");
goto cleanup;
}
GST_DEBUG ("CRTC with ID %" G_GUINT32_FORMAT " can be found at index #%d "
"in the DRM mode resources CRTC array", display_gbm->crtc_id,
display_gbm->crtc_index);
}
GST_DEBUG ("DRM structures initialized");
return TRUE;
cleanup:
gst_gl_display_gbm_shutdown_drm (display_gbm);
return FALSE;
}
static void
gst_gl_display_gbm_shutdown_drm (GstGLDisplayGBM * display_gbm)
{
g_assert (display_gbm != NULL);
display_gbm->drm_mode_info = NULL;
display_gbm->crtc_index = -1;
display_gbm->crtc_id = INVALID_CRTC;
if (display_gbm->drm_mode_connector != NULL) {
drmModeFreeConnector (display_gbm->drm_mode_connector);
display_gbm->drm_mode_connector = NULL;
}
if (display_gbm->drm_mode_resources != NULL) {
drmModeFreeResources (display_gbm->drm_mode_resources);
display_gbm->drm_mode_resources = NULL;
}
}
static gboolean
gst_gl_display_gbm_setup_gbm (GstGLDisplayGBM * display_gbm)
{
display_gbm->gbm_dev = gbm_create_device (display_gbm->drm_fd);
if (display_gbm->gbm_dev == NULL) {
GST_ERROR ("Creating GBM device failed");
return FALSE;
}
GST_DEBUG ("GBM structures initialized");
return TRUE;
}
static void
gst_gl_display_gbm_shutdown_gbm (GstGLDisplayGBM * display_gbm)
{
if (display_gbm->gbm_dev != NULL) {
gbm_device_destroy (display_gbm->gbm_dev);
display_gbm->gbm_dev = NULL;
}
}
static void
_init_debug (void)
{
static volatile gsize _init = 0;
if (g_once_init_enter (&_init)) {
GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
GST_DEBUG_CATEGORY_INIT (gst_gl_gbm_debug, "gleglgbm", 0,
"Mesa3D EGL GBM debugging");
g_once_init_leave (&_init, 1);
}
}
GstGLDisplayGBM *
gst_gl_display_gbm_new (void)
{
int drm_fd = -1;
GstGLDisplayGBM *display;
const gchar *drm_node_name;
_init_debug ();
drm_node_name = g_getenv ("GST_GL_GBM_DRM_DEVICE");
if (drm_node_name != NULL) {
GST_DEBUG ("attempting to open device %s (specified by the "
"GST_GL_GBM_DRM_DEVICE environment variable)", drm_node_name);
drm_fd = open (drm_node_name, O_RDWR | O_CLOEXEC);
if (drm_fd < 0) {
GST_ERROR ("could not open DRM device %s: %s (%d)", drm_node_name,
g_strerror (errno), errno);
return NULL;
}
} else {
GST_DEBUG ("GST_GL_GBM_DRM_DEVICE environment variable is not "
"set - trying to autodetect device");
drm_fd = gst_gl_gbm_find_and_open_drm_node ();
if (drm_fd < 0) {
GST_ERROR ("could not find or open DRM device");
return NULL;
}
}
display = g_object_new (GST_TYPE_GL_DISPLAY_GBM, NULL);
display->drm_fd = drm_fd;
if (!gst_gl_display_gbm_setup_drm (display)) {
GST_ERROR ("Failed to initialize DRM");
goto cleanup;
}
if (!gst_gl_display_gbm_setup_gbm (display)) {
GST_ERROR ("Failed to initialize GBM");
goto cleanup;
}
GST_DEBUG ("Created GBM EGL display %p", (gpointer) display);
return display;
cleanup:
gst_gl_display_gbm_shutdown_gbm (display);
gst_gl_display_gbm_shutdown_drm (display);
gst_object_unref (G_OBJECT (display));
if (drm_fd >= 0)
close (drm_fd);
return NULL;
}

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/*
* GStreamer
* Copyright (C) 2018 Carlos Rafael Giani <dv@pseudoterminal.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_GL_DISPLAY_GBM_H__
#define __GST_GL_DISPLAY_GBM_H__
#include <gbm.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <gst/gst.h>
#include <gst/gl/gstgldisplay.h>
#include <gst/gl/egl/gstegl.h>
G_BEGIN_DECLS
GType gst_gl_display_gbm_get_type (void);
#define GST_TYPE_GL_DISPLAY_GBM (gst_gl_display_gbm_get_type())
#define GST_GL_DISPLAY_GBM(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_DISPLAY_GBM,GstGLDisplayGBM))
#define GST_GL_DISPLAY_GBM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_GL_DISPLAY_GBM,GstGLDisplayGBMClass))
#define GST_IS_GL_DISPLAY_GBM(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_DISPLAY_GBM))
#define GST_IS_GL_DISPLAY_GBM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_GL_DISPLAY_GBM))
#define GST_GL_DISPLAY_GBM_CAST(obj) ((GstGLDisplayGBM*)(obj))
#define GST_GL_DISPLAY_GBM_PRIVATE(obj) (((GstGLDisplayGBM*)(obj))->priv)
typedef struct _GstGLDisplayGBM GstGLDisplayGBM;
typedef struct _GstGLDisplayGBMClass GstGLDisplayGBMClass;
struct _GstGLDisplayGBM
{
GstGLDisplay parent;
/* <private> */
int drm_fd;
drmModeRes *drm_mode_resources;
drmModeConnector *drm_mode_connector;
drmModeModeInfo *drm_mode_info;
int crtc_index;
guint32 crtc_id;
struct gbm_device *gbm_dev;
gpointer _reserved[GST_PADDING];
};
struct _GstGLDisplayGBMClass
{
GstGLDisplayClass object_class;
/*< private >*/
gpointer _reserved[GST_PADDING_LARGE];
};
GstGLDisplayGBM *gst_gl_display_gbm_new (void);
G_END_DECLS
#endif /* __GST_GL_DISPLAY_GBM_H__ */

357
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/*
* GStreamer
* Copyright (C) 2018 Carlos Rafael Giani <dv@pseudoterminal.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <poll.h>
#include "../gstgl_fwd.h"
#include <gst/gl/gstglcontext.h>
#include <gst/gl/egl/gstglcontext_egl.h>
#include "gstgldisplay_gbm.h"
#include "gstglwindow_gbm_egl.h"
#include "gstgl_gbm_utils.h"
#include "../gstglwindow_private.h"
#define GST_CAT_DEFAULT gst_gl_window_debug
#define GST_GL_WINDOW_GBM_EGL_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
GST_TYPE_GL_WINDOW_GBM_EGL, GstGLWindowGBMEGLPrivate))
G_DEFINE_TYPE (GstGLWindowGBMEGL, gst_gl_window_gbm_egl, GST_TYPE_GL_WINDOW);
static guintptr gst_gl_window_gbm_egl_get_window_handle (GstGLWindow * window);
static guintptr gst_gl_window_gbm_egl_get_display (GstGLWindow * window);
static void gst_gl_window_gbm_egl_set_window_handle (GstGLWindow * window,
guintptr handle);
static void gst_gl_window_gbm_egl_close (GstGLWindow * window);
static void gst_gl_window_gbm_egl_draw (GstGLWindow * window);
static gboolean gst_gl_window_gbm_init_surface (GstGLWindowGBMEGL * window_egl);
static void gst_gl_window_gbm_egl_cleanup (GstGLWindowGBMEGL * window_egl);
static void
gst_gl_window_gbm_egl_class_init (GstGLWindowGBMEGLClass * klass)
{
GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
window_class->get_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_gbm_egl_get_window_handle);
window_class->get_display =
GST_DEBUG_FUNCPTR (gst_gl_window_gbm_egl_get_display);
window_class->set_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_gbm_egl_set_window_handle);
window_class->close = GST_DEBUG_FUNCPTR (gst_gl_window_gbm_egl_close);
window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_gbm_egl_draw);
/* TODO: add support for set_render_rectangle (assuming this functionality
* is possible with libdrm/gbm) */
}
static void
gst_gl_window_gbm_egl_init (GstGLWindowGBMEGL * window_gbm)
{
window_gbm->gbm_surf = NULL;
window_gbm->current_bo = NULL;
window_gbm->prev_bo = NULL;
window_gbm->waiting_for_flip = 0;
}
static guintptr
gst_gl_window_gbm_egl_get_window_handle (GstGLWindow * window)
{
GstGLWindowGBMEGL *window_egl = GST_GL_WINDOW_GBM_EGL (window);
/* This function is called in here, and not in the open()
* vmethod. The reason for this is explained inside the
* gst_gl_window_gbm_init_surface() function. */
if (window_egl->gbm_surf == NULL) {
if (!gst_gl_window_gbm_init_surface (window_egl))
return 0;
}
return (guintptr) GST_GL_WINDOW_GBM_EGL (window)->gbm_surf;
}
static guintptr
gst_gl_window_gbm_egl_get_display (GstGLWindow * window)
{
return gst_gl_display_get_handle (window->display);
}
static void
gst_gl_window_gbm_egl_set_window_handle (G_GNUC_UNUSED GstGLWindow * window,
G_GNUC_UNUSED guintptr handle)
{
/* TODO: Currently, it is unclear how to use external GBM buffer objects,
* since it is not defined how this would work together with DRM page flips
*/
}
static void
gst_gl_window_gbm_egl_close (GstGLWindow * window)
{
GstGLWindowGBMEGL *window_egl = GST_GL_WINDOW_GBM_EGL (window);
gst_gl_window_gbm_egl_cleanup (window_egl);
GST_GL_WINDOW_CLASS (gst_gl_window_gbm_egl_parent_class)->close (window);
}
static void
_page_flip_handler (G_GNUC_UNUSED int fd, G_GNUC_UNUSED unsigned int frame,
G_GNUC_UNUSED unsigned int sec, G_GNUC_UNUSED unsigned int usec, void *data)
{
/* If we reach this point, it means the page flip has been completed.
* Signal this by clearing the flag so the poll() loop in draw_cb()
* can exit. */
int *waiting_for_flip = data;
*waiting_for_flip = 0;
}
static void
draw_cb (gpointer data)
{
GstGLWindowGBMEGL *window_egl = data;
GstGLWindow *window = GST_GL_WINDOW (window_egl);
GstGLContext *context = gst_gl_window_get_context (window);
GstGLContextClass *context_class = GST_GL_CONTEXT_GET_CLASS (context);
GstGLDisplayGBM *display = (GstGLDisplayGBM *) window->display;
struct gbm_bo *next_bo;
GstGLDRMFramebuffer *framebuf;
int ret;
drmEventContext evctx = {
.version = DRM_EVENT_CONTEXT_VERSION,
.page_flip_handler = _page_flip_handler,
};
struct pollfd pfd = {
.fd = display->drm_fd,
.events = POLLIN,
.revents = 0,
};
/* Rendering, page flipping etc. are connect this way:
*
* The frames are stored in buffer objects (BOs). Inside the eglSwapBuffers()
* call, GBM creates new BOs if necessary. BOs can be "locked" for rendering,
* meaning that EGL cannot use them as a render target. If all available
* BOs are locked, the GBM code inside eglSwapBuffers() creates a new,
* unlocked one. We make use of this to implement triple buffering.
*
* There are 3 BOs in play:
*
* * next_bo: The BO we just rendered into.
* * current_bo: The currently displayed BO.
* * prev_bo: The previously displayed BO.
*
* current_bo and prev_bo are involed in page flipping. next_bo is not.
*
* Once rendering is done, the next_bo is retrieved and locked. Then, we
* wait until any ongoing page flipping finishes. Once it does, the
* current_bo is displayed on screen, and the prev_bo isn't anymore. At
* this point, it is safe to release the prev_bo, which unlocks it and
* makes it available again as a render target. Then we initiate the
* next page flipping; this time, we flip to next_bo. At that point,
* next_bo becomes current_bo, and current_bo becomes prev_bo.
*/
/*
* There is a special case at the beginning. There is no currently
* displayed BO at first, so we create an empty one to get the page
* flipping cycle going. Also, we use this first BO for setting up
* the CRTC.
*/
if (window_egl->current_bo == NULL) {
/* Call eglSwapBuffers() to create a BO. */
context_class->swap_buffers (context);
/* Lock the BO so we get our first current_bo. */
window_egl->current_bo =
gbm_surface_lock_front_buffer (window_egl->gbm_surf);
framebuf = gst_gl_gbm_drm_fb_get_from_bo (window_egl->current_bo);
/* Configure CRTC to show this first BO. */
ret = drmModeSetCrtc (display->drm_fd, display->crtc_id, framebuf->fb_id,
0, 0, &(display->drm_mode_connector->connector_id), 1,
display->drm_mode_info);
if (ret != 0) {
GST_ERROR ("Could not set DRM CRTC: %s (%d)", g_strerror (errno), errno);
/* XXX: it is not possible to communicate the error to the pipeline */
return;
}
}
/* Do the actual drawing */
if (window->draw)
window->draw (window->draw_data);
/* Let the context class call eglSwapBuffers(). As mentioned above,
* if necessary, this function creates a new unlocked framebuffer
* that can be used as render target. */
context_class->swap_buffers (context);
gst_object_unref (context);
next_bo = gbm_surface_lock_front_buffer (window_egl->gbm_surf);
framebuf = gst_gl_gbm_drm_fb_get_from_bo (next_bo);
GST_LOG ("rendered new frame into bo %p", (gpointer) next_bo);
/* Wait until any ongoing page flipping is done. After this is done,
* prev_bo is no longer involved in any page flipping, and can be
* safely released. */
while (window_egl->waiting_for_flip) {
ret = poll (&pfd, 1, -1);
if (ret < 0) {
if (errno == EINTR)
GST_DEBUG ("Signal caught during poll() call");
else
GST_ERROR ("poll() failed: %s (%d)", g_strerror (errno), errno);
/* XXX: it is not possible to communicate errors and interruptions
* to the pipeline */
return;
}
drmHandleEvent (display->drm_fd, &evctx);
}
GST_LOG ("now showing bo %p", (gpointer) (window_egl->current_bo));
/* Release prev_bo, since it is no longer shown on screen. */
if (G_LIKELY (window_egl->prev_bo != NULL)) {
gbm_surface_release_buffer (window_egl->gbm_surf, window_egl->prev_bo);
GST_LOG ("releasing bo %p", (gpointer) (window_egl->prev_bo));
}
/* Presently, current_bo is shown on screen. Schedule the next page
* flip, this time flip to next_bo. The flip happens asynchronously, so
* we can continue and render etc. in the meantime. */
window_egl->waiting_for_flip = 1;
ret = drmModePageFlip (display->drm_fd, display->crtc_id, framebuf->fb_id,
DRM_MODE_PAGE_FLIP_EVENT, &(window_egl->waiting_for_flip));
if (ret != 0) {
/* NOTE: According to libdrm sources, the page is _not_
* considered flipped if drmModePageFlip() reports an error,
* so we do not update the priv->current_bo pointer here */
GST_ERROR ("Could not initialize GBM surface");
/* XXX: it is not possible to communicate the error to the pipeline */
return;
}
/* At this point, we relabel the current_bo as the prev_bo.
* This may not actually be the case yet, but it will be soon - latest
* when the wait loop above finishes.
* Also, next_bo becomes current_bo. */
window_egl->prev_bo = window_egl->current_bo;
window_egl->current_bo = next_bo;
}
static void
gst_gl_window_gbm_egl_draw (GstGLWindow * window)
{
gst_gl_window_send_message (window, (GstGLWindowCB) draw_cb, window);
}
static gboolean
gst_gl_window_gbm_init_surface (GstGLWindowGBMEGL * window_egl)
{
/* NOTE: This function cannot be called in the open() vmethod
* since context_egl->egl_display and context_egl->egl_config
* must have been set to valid values at this point, and open()
* is called _before_ these are set.
* Also, eglInitialize() is called _after_ the open() vmethod,
* which means that the return value of gbm_surface_create()
* contains some function pointers that are set to NULL and
* shouldn't be. This is because Mesa's eglInitialize() loads
* the DRI2 driver and the relevant functions aren't available
* until then. */
GstGLWindow *window = GST_GL_WINDOW (window_egl);
GstGLDisplayGBM *display = (GstGLDisplayGBM *) window->display;
drmModeModeInfo *drm_mode_info = display->drm_mode_info;
GstGLContext *context = gst_gl_window_get_context (window);
GstGLContextEGL *context_egl = GST_GL_CONTEXT_EGL (context);
EGLint gbm_format;
/* With GBM-based EGL displays and configs, the native visual ID
* is a GBM pixel format. */
if (!eglGetConfigAttrib (context_egl->egl_display, context_egl->egl_config,
EGL_NATIVE_VISUAL_ID, &gbm_format)) {
GST_ERROR ("eglGetConfigAttrib failed: %s",
gst_egl_get_error_string (eglGetError ()));
return FALSE;
}
/* Create a GBM surface that shall contain the BOs we are
* going to render into. */
window_egl->gbm_surf = gbm_surface_create (display->gbm_dev,
drm_mode_info->hdisplay, drm_mode_info->vdisplay, gbm_format,
GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
gst_gl_window_resize (window, drm_mode_info->hdisplay,
drm_mode_info->vdisplay);
GST_DEBUG ("Successfully created GBM surface");
return TRUE;
}
static void
gst_gl_window_gbm_egl_cleanup (GstGLWindowGBMEGL * window_egl)
{
if (window_egl->gbm_surf != NULL) {
if (window_egl->current_bo != NULL) {
gbm_surface_release_buffer (window_egl->gbm_surf, window_egl->current_bo);
window_egl->current_bo = NULL;
}
gbm_surface_destroy (window_egl->gbm_surf);
window_egl->gbm_surf = NULL;
}
}
/* Must be called in the gl thread */
GstGLWindowGBMEGL *
gst_gl_window_gbm_egl_new (GstGLDisplay * display)
{
GstGLWindowGBMEGL *window_egl;
if ((gst_gl_display_get_handle_type (display) & GST_GL_DISPLAY_TYPE_GBM) == 0)
/* we require a GBM display to create windows */
return NULL;
window_egl = g_object_new (GST_TYPE_GL_WINDOW_GBM_EGL, NULL);
return window_egl;
}

69
gst-libs/gst/gl/gbm/gstglwindow_gbm_egl.h Normal file
View file

@ -0,0 +1,69 @@
/*
* GStreamer
* Copyright (C) 2018 Carlos Rafael Giani <dv@pseudoterminal.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_GL_WINDOW_GBM_EGL_H__
#define __GST_GL_WINDOW_GBM_EGL_H__
#include <gbm.h>
#include <gst/gl/gl.h>
#include <gst/gl/egl/gstegl.h>
G_BEGIN_DECLS
#define GST_TYPE_GL_WINDOW_GBM_EGL (gst_gl_window_gbm_egl_get_type())
#define GST_GL_WINDOW_GBM_EGL(o) (G_TYPE_CHECK_INSTANCE_CAST((o), GST_TYPE_GL_WINDOW_GBM_EGL, GstGLWindowGBMEGL))
#define GST_GL_WINDOW_GBM_EGL_CLASS(k) (G_TYPE_CHECK_CLASS((k), GST_TYPE_GL_WINDOW_GBM_EGL, GstGLWindowGBMEGLClass))
#define GST_IS_GL_WINDOW_GBM_EGL(o) (G_TYPE_CHECK_INSTANCE_TYPE((o), GST_TYPE_GL_WINDOW_GBM_EGL))
#define GST_IS_GL_WINDOW_GBM_EGL_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE((k), GST_TYPE_GL_WINDOW_GBM_EGL))
#define GST_GL_WINDOW_GBM_EGL_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS((o), GST_TYPE_GL_WINDOW_GBM_EGL, GstGLWindowGBMEGL_Class))
typedef struct _GstGLWindowGBMEGL GstGLWindowGBMEGL;
typedef struct _GstGLWindowGBMEGLClass GstGLWindowGBMEGLClass;
typedef struct _GstGLDisplayGBM GstGLDisplayGBM;
struct _GstGLWindowGBMEGL {
/*< private >*/
GstGLWindow parent;
struct gbm_surface *gbm_surf;
struct gbm_bo *current_bo, *prev_bo;
int waiting_for_flip;
GstGLDisplayGBM *display;
gpointer _reserved[GST_PADDING];
};
struct _GstGLWindowGBMEGLClass {
/*< private >*/
GstGLWindowClass parent_class;
/*< private >*/
gpointer _reserved[GST_PADDING_LARGE];
};
GType gst_gl_window_gbm_egl_get_type (void);
GstGLWindowGBMEGL * gst_gl_window_gbm_egl_new (GstGLDisplay * display);
G_END_DECLS
#endif /* __GST_GL_WINDOW_GBM_EGL_H__ */

8
gst-libs/gst/gl/gstgldisplay.c
View file

@ -73,6 +73,9 @@
#if GST_GL_HAVE_WINDOW_VIV_FB
#include <gst/gl/viv-fb/gstgldisplay_viv_fb.h>
#endif
#if GST_GL_HAVE_WINDOW_GBM
#include <gst/gl/gbm/gstgldisplay_gbm.h>
#endif
GST_DEBUG_CATEGORY_STATIC (gst_context);
GST_DEBUG_CATEGORY_STATIC (gst_gl_display_debug);
@ -313,6 +316,11 @@ gst_gl_display_new (void)
display = GST_GL_DISPLAY (gst_gl_display_viv_fb_new (disp_idx));
}
#endif
#if GST_GL_HAVE_WINDOW_GBM
if (!display && (!user_choice || g_strstr_len (user_choice, 3, "gbm"))) {
display = GST_GL_DISPLAY (gst_gl_display_gbm_new ());
}
#endif
#if GST_GL_HAVE_PLATFORM_EGL
if (!display && (!platform_choice
|| g_strstr_len (platform_choice, 3, "egl")))

2
gst-libs/gst/gl/gstgldisplay.h
View file

@ -49,6 +49,7 @@ GType gst_gl_display_get_type (void);
* @GST_GL_DISPLAY_TYPE_DISPMANX: Dispmanx display
* @GST_GL_DISPLAY_TYPE_EGL: EGL display
* @GST_GL_DISPLAY_TYPE_VIV_FB: Vivante Framebuffer display
* @GST_GL_DISPLAY_TYPE_GBM: Mesa3D GBM display
* @GST_GL_DISPLAY_TYPE_ANY: any display type
*/
typedef enum
@ -61,6 +62,7 @@ typedef enum
GST_GL_DISPLAY_TYPE_DISPMANX = (1 << 4),
GST_GL_DISPLAY_TYPE_EGL = (1 << 5),
GST_GL_DISPLAY_TYPE_VIV_FB = (1 << 6),
GST_GL_DISPLAY_TYPE_GBM = (1 << 7),
GST_GL_DISPLAY_TYPE_ANY = G_MAXUINT32
} GstGLDisplayType;

7
gst-libs/gst/gl/gstglwindow.c
View file

@ -62,6 +62,9 @@
#if GST_GL_HAVE_WINDOW_VIV_FB
#include "viv-fb/gstglwindow_viv_fb_egl.h"
#endif
#if GST_GL_HAVE_WINDOW_GBM
#include "gbm/gstglwindow_gbm_egl.h"
#endif
#if GST_GL_HAVE_WINDOW_DISPMANX
#include "dispmanx/gstglwindow_dispmanx_egl.h"
#endif
@ -279,6 +282,10 @@ gst_gl_window_new (GstGLDisplay * display)
if (!window && (!user_choice || g_strstr_len (user_choice, 6, "viv-fb")))
window = GST_GL_WINDOW (gst_gl_window_viv_fb_egl_new (display));
#endif
#if GST_GL_HAVE_WINDOW_GBM
if (!window && (!user_choice || g_strstr_len (user_choice, 3, "gbm")))
window = GST_GL_WINDOW (gst_gl_window_gbm_egl_new (display));
#endif
if (!window) {
/* subclass returned a NULL window */

27
m4/gst-gl.m4
View file

@ -126,6 +126,7 @@ HAVE_GLES2=no
HAVE_GLES3_H=no
HAVE_WAYLAND_EGL=no
HAVE_VIV_FB_EGL=no
HAVE_GBM_EGL=no
HAVE_EGL_RPI=no
case $host in
@ -171,6 +172,12 @@ case $host in
AC_CHECK_LIB([EGL], [fbGetDisplay], [HAVE_VIV_FB_EGL=yes])
fi
if test "x$HAVE_EGL" = "xyes" -a "x$HAVE_DRM" = "xyes"; then
PKG_CHECK_MODULES(GBM, gbm, HAVE_GBM_EGL=yes, HAVE_GBM_EGL=no)
AC_SUBST(GBM_CFLAGS)
AC_SUBST(GBM_LIBS)
fi
dnl FIXME: Mali EGL depends on GLESv1 or GLESv2
AC_CHECK_HEADER([EGL/fbdev_window.h],
[
@ -467,6 +474,16 @@ case $host in
fi
fi
if test "x$HAVE_GBM_EGL" = "xyes"; then
if test "x$NEED_EGL" = "xno" -o "x$HAVE_EGL" = "xno"; then
AC_MSG_WARN([EGL is required by the Mesa GBM EGL backend])
else
HAVE_WINDOW_GBM=yes
GL_LIBS="$GL_LIBS"
GL_CFLAGS="$GL_CFLAGS"
fi
fi
if test "x$HAVE_X11_XCB" = "xyes" -a "x$HAVE_EGL_RPI" = "xno"; then
if test "x$NEED_X11" != "xno"; then
GL_LIBS="$GL_LIBS $X11_XCB_LIBS"
@ -511,7 +528,7 @@ case $host in
fi
else
if test "x$NEED_EGL" != "xno"; then
if test "x$HAVE_WINDOW_WAYLAND" = "xyes" -o "x$HAVE_WINDOW_X11" = "xyes" -o "x$HAVE_WINDOW_DISPMANX" = "xyes" -o "x$HAVE_WINDOW_VIV_FB" = "xyes"; then
if test "x$HAVE_WINDOW_WAYLAND" = "xyes" -o "x$HAVE_WINDOW_X11" = "xyes" -o "x$HAVE_WINDOW_DISPMANX" = "xyes" -o "x$HAVE_WINDOW_VIV_FB" = "xyes" -o "x$HAVE_WINDOW_GBM" = "xyes"; then
GL_LIBS="$GL_LIBS -lEGL $EGL_LIBS"
GL_CFLAGS="$GL_CFLAGS $EGL_CFLAGS"
USE_EGL=yes
@ -669,6 +686,7 @@ GST_GL_HAVE_WINDOW_ANDROID=0
GST_GL_HAVE_WINDOW_DISPMANX=0
GST_GL_HAVE_WINDOW_EAGL=0
GST_GL_HAVE_WINDOW_VIV_FB=0
GST_GL_HAVE_WINDOW_GBM=0
if test "x$HAVE_WINDOW_X11" = "xyes"; then
GL_WINDOWS="x11 $GL_WINDOWS"
@ -702,6 +720,10 @@ if test "x$HAVE_WINDOW_VIV_FB" = "xyes"; then
GL_WINDOWS="viv-fb $GL_WINDOWS"
GST_GL_HAVE_WINDOW_VIV_FB=1
fi
if test "x$HAVE_WINDOW_GBM" = "xyes"; then
GL_WINDOWS="gbm $GL_WINDOWS"
GST_GL_HAVE_WINDOW_GBM=1
fi
GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
#define GST_GL_HAVE_WINDOW_X11 $GST_GL_HAVE_WINDOW_X11
@ -712,6 +734,7 @@ GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
#define GST_GL_HAVE_WINDOW_DISPMANX $GST_GL_HAVE_WINDOW_DISPMANX
#define GST_GL_HAVE_WINDOW_EAGL $GST_GL_HAVE_WINDOW_EAGL
#define GST_GL_HAVE_WINDOW_VIV_FB $GST_GL_HAVE_WINDOW_VIV_FB
#define GST_GL_HAVE_WINDOW_GBM $GST_GL_HAVE_WINDOW_GBM
"
dnl PLATFORM's
@ -789,6 +812,7 @@ if test "x$GL_APIS" = "x" -o "x$GL_PLATFORMS" = "x" -o "x$GL_WINDOWS" = "x"; the
HAVE_WINDOW_COCOA=no
HAVE_WINDOW_EAGL=no
HAVE_WINDOW_VIV_FB=no
HAVE_WINDOW_GBM=no
fi
AC_SUBST(GL_APIS)
@ -808,6 +832,7 @@ AM_CONDITIONAL(HAVE_WINDOW_WAYLAND, test "x$HAVE_WINDOW_WAYLAND" = "xyes")
AM_CONDITIONAL(HAVE_WINDOW_ANDROID, test "x$HAVE_WINDOW_ANDROID" = "xyes")
AM_CONDITIONAL(HAVE_WINDOW_EAGL, test "x$HAVE_WINDOW_EAGL" = "xyes")
AM_CONDITIONAL(HAVE_WINDOW_VIV_FB, test "x$HAVE_WINDOW_VIV_FB" = "xyes")
AM_CONDITIONAL(HAVE_WINDOW_GBM, test "x$HAVE_WINDOW_GBM" = "xyes")
AM_CONDITIONAL(USE_OPENGL, test "x$USE_OPENGL" = "xyes")
AM_CONDITIONAL(USE_GLES2, test "x$USE_GLES2" = "xyes")