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/*
* Copyright 2021 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/desktop_capture/linux/wayland/egl_dmabuf.h"
#include <asm/ioctl.h>
#include <dlfcn.h>
#include <fcntl.h>
#include <gdk/gdk.h>
#include <libdrm/drm_fourcc.h>
#include <linux/types.h>
#include <spa/param/video/format-utils.h>
#include <unistd.h>
#include <xf86drm.h>
#include <optional>
#include "absl/memory/memory.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
#include "rtc_base/sanitizer.h"
#include "rtc_base/string_encode.h"
namespace webrtc {
// EGL
typedef EGLBoolean (*eglBindAPI_func)(EGLenum api);
typedef EGLContext (*eglCreateContext_func)(EGLDisplay dpy,
EGLConfig config,
EGLContext share_context,
const EGLint* attrib_list);
typedef EGLBoolean (*eglDestroyContext_func)(EGLDisplay display,
EGLContext context);
typedef EGLBoolean (*eglTerminate_func)(EGLDisplay display);
typedef EGLImageKHR (*eglCreateImageKHR_func)(EGLDisplay dpy,
EGLContext ctx,
EGLenum target,
EGLClientBuffer buffer,
const EGLint* attrib_list);
typedef EGLBoolean (*eglDestroyImageKHR_func)(EGLDisplay dpy,
EGLImageKHR image);
typedef EGLint (*eglGetError_func)(void);
typedef void* (*eglGetProcAddress_func)(const char*);
typedef EGLDisplay (*eglGetPlatformDisplayEXT_func)(EGLenum platform,
void* native_display,
const EGLint* attrib_list);
typedef EGLDisplay (*eglGetPlatformDisplay_func)(EGLenum platform,
void* native_display,
const EGLAttrib* attrib_list);
typedef EGLBoolean (*eglInitialize_func)(EGLDisplay dpy,
EGLint* major,
EGLint* minor);
typedef EGLBoolean (*eglMakeCurrent_func)(EGLDisplay dpy,
EGLSurface draw,
EGLSurface read,
EGLContext ctx);
typedef EGLBoolean (*eglQueryDmaBufFormatsEXT_func)(EGLDisplay dpy,
EGLint max_formats,
EGLint* formats,
EGLint* num_formats);
typedef EGLBoolean (*eglQueryDmaBufModifiersEXT_func)(EGLDisplay dpy,
EGLint format,
EGLint max_modifiers,
EGLuint64KHR* modifiers,
EGLBoolean* external_only,
EGLint* num_modifiers);
typedef const char* (*eglQueryString_func)(EGLDisplay dpy, EGLint name);
typedef void (*glEGLImageTargetTexture2DOES_func)(GLenum target,
GLeglImageOES image);
// This doesn't follow naming conventions in WebRTC, where the naming
// should look like e.g. egl_bind_api instead of EglBindAPI, however
// we named them according to the exported functions they map to for
// consistency.
eglBindAPI_func EglBindAPI = nullptr;
eglCreateContext_func EglCreateContext = nullptr;
eglDestroyContext_func EglDestroyContext = nullptr;
eglTerminate_func EglTerminate = nullptr;
eglCreateImageKHR_func EglCreateImageKHR = nullptr;
eglDestroyImageKHR_func EglDestroyImageKHR = nullptr;
eglGetError_func EglGetError = nullptr;
eglGetProcAddress_func EglGetProcAddress = nullptr;
eglGetPlatformDisplayEXT_func EglGetPlatformDisplayEXT = nullptr;
eglGetPlatformDisplay_func EglGetPlatformDisplay = nullptr;
eglInitialize_func EglInitialize = nullptr;
eglMakeCurrent_func EglMakeCurrent = nullptr;
eglQueryDmaBufFormatsEXT_func EglQueryDmaBufFormatsEXT = nullptr;
eglQueryDmaBufModifiersEXT_func EglQueryDmaBufModifiersEXT = nullptr;
eglQueryString_func EglQueryString = nullptr;
glEGLImageTargetTexture2DOES_func GlEGLImageTargetTexture2DOES = nullptr;
// GL
typedef void (*glBindTexture_func)(GLenum target, GLuint texture);
typedef void (*glDeleteTextures_func)(GLsizei n, const GLuint* textures);
typedef void (*glGenTextures_func)(GLsizei n, GLuint* textures);
typedef GLenum (*glGetError_func)(void);
typedef const GLubyte* (*glGetString_func)(GLenum name);
typedef void (*glReadPixels_func)(GLint x,
GLint y,
GLsizei width,
GLsizei height,
GLenum format,
GLenum type,
void* data);
typedef void (*glGenFramebuffers_func)(GLsizei n, GLuint* ids);
typedef void (*glDeleteFramebuffers_func)(GLsizei n,
const GLuint* framebuffers);
typedef void (*glBindFramebuffer_func)(GLenum target, GLuint framebuffer);
typedef void (*glFramebufferTexture2D_func)(GLenum target,
GLenum attachment,
GLenum textarget,
GLuint texture,
GLint level);
typedef GLenum (*glCheckFramebufferStatus_func)(GLenum target);
typedef void (*glTexParameteri_func)(GLenum target, GLenum pname, GLint param);
typedef void* (*glXGetProcAddressARB_func)(const char*);
// This doesn't follow naming conventions in WebRTC, where the naming
// should look like e.g. egl_bind_api instead of EglBindAPI, however
// we named them according to the exported functions they map to for
// consistency.
glBindTexture_func GlBindTexture = nullptr;
glDeleteTextures_func GlDeleteTextures = nullptr;
glGenTextures_func GlGenTextures = nullptr;
glGetError_func GlGetError = nullptr;
glGetString_func GlGetString = nullptr;
glReadPixels_func GlReadPixels = nullptr;
glGenFramebuffers_func GlGenFramebuffers = nullptr;
glDeleteFramebuffers_func GlDeleteFramebuffers = nullptr;
glBindFramebuffer_func GlBindFramebuffer = nullptr;
glFramebufferTexture2D_func GlFramebufferTexture2D = nullptr;
glCheckFramebufferStatus_func GlCheckFramebufferStatus = nullptr;
glTexParameteri_func GlTexParameteri = nullptr;
glXGetProcAddressARB_func GlXGetProcAddressARB = nullptr;
static const std::string FormatGLError(GLenum err) {
switch (err) {
case GL_NO_ERROR:
return "GL_NO_ERROR";
case GL_INVALID_ENUM:
return "GL_INVALID_ENUM";
case GL_INVALID_VALUE:
return "GL_INVALID_VALUE";
case GL_INVALID_OPERATION:
return "GL_INVALID_OPERATION";
case GL_STACK_OVERFLOW:
return "GL_STACK_OVERFLOW";
case GL_STACK_UNDERFLOW:
return "GL_STACK_UNDERFLOW";
case GL_OUT_OF_MEMORY:
return "GL_OUT_OF_MEMORY";
default:
return "GL error code: " + std::to_string(err);
}
}
static const std::string FormatEGLError(EGLint err) {
switch (err) {
case EGL_NOT_INITIALIZED:
return "EGL_NOT_INITIALIZED";
case EGL_BAD_ACCESS:
return "EGL_BAD_ACCESS";
case EGL_BAD_ALLOC:
return "EGL_BAD_ALLOC";
case EGL_BAD_ATTRIBUTE:
return "EGL_BAD_ATTRIBUTE";
case EGL_BAD_CONTEXT:
return "EGL_BAD_CONTEXT";
case EGL_BAD_CONFIG:
return "EGL_BAD_CONFIG";
case EGL_BAD_CURRENT_SURFACE:
return "EGL_BAD_CURRENT_SURFACE";
case EGL_BAD_DISPLAY:
return "EGL_BAD_DISPLAY";
case EGL_BAD_SURFACE:
return "EGL_BAD_SURFACE";
case EGL_BAD_MATCH:
return "EGL_BAD_MATCH";
case EGL_BAD_PARAMETER:
return "EGL_BAD_PARAMETER";
case EGL_BAD_NATIVE_PIXMAP:
return "EGL_BAD_NATIVE_PIXMAP";
case EGL_BAD_NATIVE_WINDOW:
return "EGL_BAD_NATIVE_WINDOW";
case EGL_CONTEXT_LOST:
return "EGL_CONTEXT_LOST";
default:
return "EGL error code: " + std::to_string(err);
}
}
static uint32_t SpaPixelFormatToDrmFormat(uint32_t spa_format) {
switch (spa_format) {
case SPA_VIDEO_FORMAT_RGBA:
return DRM_FORMAT_ABGR8888;
case SPA_VIDEO_FORMAT_RGBx:
return DRM_FORMAT_XBGR8888;
case SPA_VIDEO_FORMAT_BGRA:
return DRM_FORMAT_ARGB8888;
case SPA_VIDEO_FORMAT_BGRx:
return DRM_FORMAT_XRGB8888;
default:
return DRM_FORMAT_INVALID;
}
}
static void CloseLibrary(void* library) {
if (library) {
dlclose(library);
library = nullptr;
}
}
static bool IsWaylandDisplay() {
static auto sGdkWaylandDisplayGetType =
(GType (*)(void))dlsym(RTLD_DEFAULT, "gdk_wayland_display_get_type");
if (!sGdkWaylandDisplayGetType) {
return false;
}
return (G_TYPE_CHECK_INSTANCE_TYPE ((gdk_display_get_default()),
sGdkWaylandDisplayGetType()));
}
static bool IsX11Display() {
static auto sGdkX11DisplayGetType =
(GType (*)(void))dlsym(RTLD_DEFAULT, "gdk_x11_display_get_type");
if (!sGdkX11DisplayGetType) {
return false;
}
return (G_TYPE_CHECK_INSTANCE_TYPE ((gdk_display_get_default()),
sGdkX11DisplayGetType()));
}
static void* g_lib_egl = nullptr;
RTC_NO_SANITIZE("cfi-icall")
static bool OpenEGL() {
g_lib_egl = dlopen("libEGL.so.1", RTLD_NOW | RTLD_GLOBAL);
if (g_lib_egl) {
EglGetProcAddress =
(eglGetProcAddress_func)dlsym(g_lib_egl, "eglGetProcAddress");
return EglGetProcAddress;
}
return false;
}
RTC_NO_SANITIZE("cfi-icall")
static bool LoadEGL() {
if (OpenEGL()) {
EglBindAPI = (eglBindAPI_func)EglGetProcAddress("eglBindAPI");
EglCreateContext =
(eglCreateContext_func)EglGetProcAddress("eglCreateContext");
EglDestroyContext =
(eglDestroyContext_func)EglGetProcAddress("eglDestroyContext");
EglTerminate = (eglTerminate_func)EglGetProcAddress("eglTerminate");
EglCreateImageKHR =
(eglCreateImageKHR_func)EglGetProcAddress("eglCreateImageKHR");
EglDestroyImageKHR =
(eglDestroyImageKHR_func)EglGetProcAddress("eglDestroyImageKHR");
EglGetError = (eglGetError_func)EglGetProcAddress("eglGetError");
EglGetPlatformDisplayEXT = (eglGetPlatformDisplayEXT_func)EglGetProcAddress(
"eglGetPlatformDisplayEXT");
EglGetPlatformDisplay =
(eglGetPlatformDisplay_func)EglGetProcAddress("eglGetPlatformDisplay");
EglInitialize = (eglInitialize_func)EglGetProcAddress("eglInitialize");
EglMakeCurrent = (eglMakeCurrent_func)EglGetProcAddress("eglMakeCurrent");
EglQueryString = (eglQueryString_func)EglGetProcAddress("eglQueryString");
GlEGLImageTargetTexture2DOES =
(glEGLImageTargetTexture2DOES_func)EglGetProcAddress(
"glEGLImageTargetTexture2DOES");
return EglBindAPI && EglCreateContext && EglCreateImageKHR &&
EglTerminate && EglDestroyContext && EglDestroyImageKHR &&
EglGetError && EglGetPlatformDisplayEXT && EglGetPlatformDisplay &&
EglInitialize && EglMakeCurrent && EglQueryString &&
GlEGLImageTargetTexture2DOES;
}
return false;
}
static void* g_lib_gl = nullptr;
RTC_NO_SANITIZE("cfi-icall")
static bool OpenGL() {
std::vector<std::string> names = {"libGL.so.1", "libGL.so"};
for (const std::string& name : names) {
g_lib_gl = dlopen(name.c_str(), RTLD_NOW | RTLD_GLOBAL);
if (g_lib_gl) {
GlXGetProcAddressARB =
(glXGetProcAddressARB_func)dlsym(g_lib_gl, "glXGetProcAddressARB");
return GlXGetProcAddressARB;
}
}
return false;
}
RTC_NO_SANITIZE("cfi-icall")
static bool LoadGL() {
if (OpenGL()) {
GlGetString = (glGetString_func)GlXGetProcAddressARB("glGetString");
if (!GlGetString) {
return false;
}
GlBindTexture = (glBindTexture_func)GlXGetProcAddressARB("glBindTexture");
GlDeleteTextures =
(glDeleteTextures_func)GlXGetProcAddressARB("glDeleteTextures");
GlGenTextures = (glGenTextures_func)GlXGetProcAddressARB("glGenTextures");
GlGetError = (glGetError_func)GlXGetProcAddressARB("glGetError");
GlReadPixels = (glReadPixels_func)GlXGetProcAddressARB("glReadPixels");
GlGenFramebuffers =
(glGenFramebuffers_func)GlXGetProcAddressARB("glGenFramebuffers");
GlDeleteFramebuffers =
(glDeleteFramebuffers_func)GlXGetProcAddressARB("glDeleteFramebuffers");
GlBindFramebuffer =
(glBindFramebuffer_func)GlXGetProcAddressARB("glBindFramebuffer");
GlFramebufferTexture2D = (glFramebufferTexture2D_func)GlXGetProcAddressARB(
"glFramebufferTexture2D");
GlCheckFramebufferStatus =
(glCheckFramebufferStatus_func)GlXGetProcAddressARB(
"glCheckFramebufferStatus");
GlTexParameteri =
(glTexParameteri_func)GlXGetProcAddressARB("glTexParameteri");
return GlBindTexture && GlDeleteTextures && GlGenTextures && GlGetError &&
GlReadPixels && GlGenFramebuffers && GlDeleteFramebuffers &&
GlBindFramebuffer && GlFramebufferTexture2D &&
GlCheckFramebufferStatus && GlTexParameteri;
}
return false;
}
RTC_NO_SANITIZE("cfi-icall")
EglDmaBuf::EglDmaBuf() {
if (!LoadEGL()) {
RTC_LOG(LS_ERROR) << "Unable to load EGL entry functions.";
CloseLibrary(g_lib_egl);
return;
}
if (!LoadGL()) {
RTC_LOG(LS_ERROR) << "Failed to load OpenGL entry functions.";
CloseLibrary(g_lib_gl);
return;
}
if (!GetClientExtensions(EGL_NO_DISPLAY, EGL_EXTENSIONS)) {
return;
}
bool has_platform_base_ext = false;
bool has_platform_gbm_ext = false;
bool has_khr_platform_gbm_ext = false;
for (const auto& extension : egl_.extensions) {
if (extension == "EGL_EXT_platform_base") {
has_platform_base_ext = true;
continue;
} else if (extension == "EGL_MESA_platform_gbm") {
has_platform_gbm_ext = true;
continue;
} else if (extension == "EGL_KHR_platform_gbm") {
has_khr_platform_gbm_ext = true;
continue;
}
}
if (!has_platform_base_ext || !has_platform_gbm_ext ||
!has_khr_platform_gbm_ext) {
RTC_LOG(LS_ERROR) << "One of required EGL extensions is missing";
return;
}
if (IsWaylandDisplay()) {
egl_.display = EglGetPlatformDisplay(EGL_PLATFORM_WAYLAND_KHR,
(void*)EGL_DEFAULT_DISPLAY, nullptr);
} else if (IsX11Display()) {
egl_.display = EglGetPlatformDisplay(EGL_PLATFORM_X11_KHR,
(void*)EGL_DEFAULT_DISPLAY, nullptr);
}
if (egl_.display == EGL_NO_DISPLAY) {
RTC_LOG(LS_ERROR) << "Failed to obtain default EGL display: "
<< FormatEGLError(EglGetError()) << "\n"
<< "Defaulting to using first available render node";
std::optional<std::string> render_node = GetRenderNode();
if (!render_node) {
return;
}
drm_fd_ = open(render_node->c_str(), O_RDWR);
if (drm_fd_ < 0) {
RTC_LOG(LS_ERROR) << "Failed to open drm render node: "
<< strerror(errno);
return;
}
gbm_device_ = gbm_create_device(drm_fd_);
if (!gbm_device_) {
RTC_LOG(LS_ERROR) << "Cannot create GBM device: " << strerror(errno);
close(drm_fd_);
return;
}
// Use eglGetPlatformDisplayEXT() to get the display pointer
// if the implementation supports it.
egl_.display =
EglGetPlatformDisplayEXT(EGL_PLATFORM_GBM_KHR, gbm_device_, nullptr);
}
if (egl_.display == EGL_NO_DISPLAY) {
RTC_LOG(LS_ERROR) << "Error during obtaining EGL display: "
<< FormatEGLError(EglGetError());
return;
}
EGLint major, minor;
if (EglInitialize(egl_.display, &major, &minor) == EGL_FALSE) {
RTC_LOG(LS_ERROR) << "Error during eglInitialize: "
<< FormatEGLError(EglGetError());
return;
}
if (EglBindAPI(EGL_OPENGL_API) == EGL_FALSE) {
RTC_LOG(LS_ERROR) << "bind OpenGL API failed";
return;
}
egl_.context =
EglCreateContext(egl_.display, nullptr, EGL_NO_CONTEXT, nullptr);
if (egl_.context == EGL_NO_CONTEXT) {
RTC_LOG(LS_ERROR) << "Couldn't create EGL context: "
<< FormatGLError(EglGetError());
return;
}
if (!GetClientExtensions(egl_.display, EGL_EXTENSIONS)) {
return;
}
bool has_image_dma_buf_import_modifiers_ext = false;
for (const auto& extension : egl_.extensions) {
if (extension == "EGL_EXT_image_dma_buf_import") {
has_image_dma_buf_import_ext_ = true;
continue;
} else if (extension == "EGL_EXT_image_dma_buf_import_modifiers") {
has_image_dma_buf_import_modifiers_ext = true;
continue;
}
}
if (has_image_dma_buf_import_ext_ && has_image_dma_buf_import_modifiers_ext) {
EglQueryDmaBufFormatsEXT = (eglQueryDmaBufFormatsEXT_func)EglGetProcAddress(
"eglQueryDmaBufFormatsEXT");
EglQueryDmaBufModifiersEXT =
(eglQueryDmaBufModifiersEXT_func)EglGetProcAddress(
"eglQueryDmaBufModifiersEXT");
}
RTC_LOG(LS_INFO) << "Egl initialization succeeded";
egl_initialized_ = true;
}
RTC_NO_SANITIZE("cfi-icall")
EglDmaBuf::~EglDmaBuf() {
if (gbm_device_) {
gbm_device_destroy(gbm_device_);
close(drm_fd_);
}
if (egl_.context != EGL_NO_CONTEXT) {
EglDestroyContext(egl_.display, egl_.context);
}
if (egl_.display != EGL_NO_DISPLAY) {
EglTerminate(egl_.display);
}
if (fbo_) {
GlDeleteFramebuffers(1, &fbo_);
}
if (texture_) {
GlDeleteTextures(1, &texture_);
}
// BUG: crbug.com/1290566
// Closing libEGL.so.1 when using NVidia drivers causes a crash
// when EglGetPlatformDisplayEXT() is used, at least this one is enough
// to be called to make it crash.
// It also looks that libepoxy and glad don't dlclose it either
// CloseLibrary(g_lib_egl);
// CloseLibrary(g_lib_gl);
}
RTC_NO_SANITIZE("cfi-icall")
bool EglDmaBuf::GetClientExtensions(EGLDisplay dpy, EGLint name) {
// Get the list of client extensions
const char* client_extensions_cstring = EglQueryString(dpy, name);
if (!client_extensions_cstring) {
// If eglQueryString() returned NULL, the implementation doesn't support
// EGL_EXT_client_extensions. Expect an EGL_BAD_DISPLAY error.
RTC_LOG(LS_ERROR) << "No client extensions defined! "
<< FormatEGLError(EglGetError());
return false;
}
std::vector<absl::string_view> client_extensions =
rtc::split(client_extensions_cstring, ' ');
for (const auto& extension : client_extensions) {
egl_.extensions.push_back(std::string(extension));
}
return true;
}
RTC_NO_SANITIZE("cfi-icall")
bool EglDmaBuf::ImageFromDmaBuf(const DesktopSize& size,
uint32_t format,
const std::vector<PlaneData>& plane_datas,
uint64_t modifier,
const DesktopVector& offset,
const DesktopSize& buffer_size,
uint8_t* data) {
if (!egl_initialized_) {
return false;
}
if (plane_datas.size() <= 0) {
RTC_LOG(LS_ERROR) << "Failed to process buffer: invalid number of planes";
return false;
}
EGLint attribs[47];
int atti = 0;
attribs[atti++] = EGL_WIDTH;
attribs[atti++] = static_cast<EGLint>(size.width());
attribs[atti++] = EGL_HEIGHT;
attribs[atti++] = static_cast<EGLint>(size.height());
attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
attribs[atti++] = SpaPixelFormatToDrmFormat(format);
if (plane_datas.size() > 0) {
attribs[atti++] = EGL_DMA_BUF_PLANE0_FD_EXT;
attribs[atti++] = plane_datas[0].fd;
attribs[atti++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
attribs[atti++] = plane_datas[0].offset;
attribs[atti++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
attribs[atti++] = plane_datas[0].stride;
if (modifier != DRM_FORMAT_MOD_INVALID) {
attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
attribs[atti++] = modifier & 0xFFFFFFFF;
attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
attribs[atti++] = modifier >> 32;
}
}
if (plane_datas.size() > 1) {
attribs[atti++] = EGL_DMA_BUF_PLANE1_FD_EXT;
attribs[atti++] = plane_datas[1].fd;
attribs[atti++] = EGL_DMA_BUF_PLANE1_OFFSET_EXT;
attribs[atti++] = plane_datas[1].offset;
attribs[atti++] = EGL_DMA_BUF_PLANE1_PITCH_EXT;
attribs[atti++] = plane_datas[1].stride;
if (modifier != DRM_FORMAT_MOD_INVALID) {
attribs[atti++] = EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT;
attribs[atti++] = modifier & 0xFFFFFFFF;
attribs[atti++] = EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT;
attribs[atti++] = modifier >> 32;
}
}
if (plane_datas.size() > 2) {
attribs[atti++] = EGL_DMA_BUF_PLANE2_FD_EXT;
attribs[atti++] = plane_datas[2].fd;
attribs[atti++] = EGL_DMA_BUF_PLANE2_OFFSET_EXT;
attribs[atti++] = plane_datas[2].offset;
attribs[atti++] = EGL_DMA_BUF_PLANE2_PITCH_EXT;
attribs[atti++] = plane_datas[2].stride;
if (modifier != DRM_FORMAT_MOD_INVALID) {
attribs[atti++] = EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT;
attribs[atti++] = modifier & 0xFFFFFFFF;
attribs[atti++] = EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT;
attribs[atti++] = modifier >> 32;
}
}
if (plane_datas.size() > 3) {
attribs[atti++] = EGL_DMA_BUF_PLANE3_FD_EXT;
attribs[atti++] = plane_datas[3].fd;
attribs[atti++] = EGL_DMA_BUF_PLANE3_OFFSET_EXT;
attribs[atti++] = plane_datas[3].offset;
attribs[atti++] = EGL_DMA_BUF_PLANE3_PITCH_EXT;
attribs[atti++] = plane_datas[3].stride;
if (modifier != DRM_FORMAT_MOD_INVALID) {
attribs[atti++] = EGL_DMA_BUF_PLANE3_MODIFIER_LO_EXT;
attribs[atti++] = modifier & 0xFFFFFFFF;
attribs[atti++] = EGL_DMA_BUF_PLANE3_MODIFIER_HI_EXT;
attribs[atti++] = modifier >> 32;
}
}
attribs[atti++] = EGL_NONE;
// bind context to render thread
EglMakeCurrent(egl_.display, EGL_NO_SURFACE, EGL_NO_SURFACE, egl_.context);
// create EGL image from attribute list
EGLImageKHR image = EglCreateImageKHR(
egl_.display, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, nullptr, attribs);
if (image == EGL_NO_IMAGE) {
RTC_LOG(LS_ERROR) << "Failed to record frame: Error creating EGLImage - "
<< FormatEGLError(EglGetError());
return false;
}
// create GL 2D texture for framebuffer
if (!texture_) {
GlGenTextures(1, &texture_);
GlTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
GlTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
GlTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
GlTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
GlBindTexture(GL_TEXTURE_2D, texture_);
GlEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
if (!fbo_) {
GlGenFramebuffers(1, &fbo_);
}
GlBindFramebuffer(GL_FRAMEBUFFER, fbo_);
GlFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
texture_, 0);
if (GlCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
RTC_LOG(LS_ERROR) << "Failed to bind DMA buf framebuffer";
EglDestroyImageKHR(egl_.display, image);
return false;
}
GLenum gl_format = GL_BGRA;
switch (format) {
case SPA_VIDEO_FORMAT_RGBx:
gl_format = GL_RGBA;
break;
case SPA_VIDEO_FORMAT_RGBA:
gl_format = GL_RGBA;
break;
case SPA_VIDEO_FORMAT_BGRx:
gl_format = GL_BGRA;
break;
default:
gl_format = GL_BGRA;
break;
}
GlReadPixels(offset.x(), offset.y(), buffer_size.width(),
buffer_size.height(), gl_format, GL_UNSIGNED_BYTE, data);
const GLenum error = GlGetError();
if (error) {
RTC_LOG(LS_ERROR) << "Failed to get image from DMA buffer.";
}
EglDestroyImageKHR(egl_.display, image);
return !error;
}
RTC_NO_SANITIZE("cfi-icall")
std::vector<uint64_t> EglDmaBuf::QueryDmaBufModifiers(uint32_t format) {
if (!egl_initialized_) {
return {};
}
// Explicit modifiers not supported, return just DRM_FORMAT_MOD_INVALID as we
// can still use modifier-less DMA-BUFs if we have required extension
if (EglQueryDmaBufFormatsEXT == nullptr ||
EglQueryDmaBufModifiersEXT == nullptr) {
return has_image_dma_buf_import_ext_
? std::vector<uint64_t>{DRM_FORMAT_MOD_INVALID}
: std::vector<uint64_t>{};
}
uint32_t drm_format = SpaPixelFormatToDrmFormat(format);
// Should never happen as it's us who controls the list of supported formats
RTC_DCHECK(drm_format != DRM_FORMAT_INVALID);
EGLint count = 0;
EGLBoolean success =
EglQueryDmaBufFormatsEXT(egl_.display, 0, nullptr, &count);
if (!success || !count) {
RTC_LOG(LS_WARNING) << "Cannot query the number of formats.";
return {DRM_FORMAT_MOD_INVALID};
}
std::vector<uint32_t> formats(count);
if (!EglQueryDmaBufFormatsEXT(egl_.display, count,
reinterpret_cast<EGLint*>(formats.data()),
&count)) {
RTC_LOG(LS_WARNING) << "Cannot query a list of formats.";
return {DRM_FORMAT_MOD_INVALID};
}
if (std::find(formats.begin(), formats.end(), drm_format) == formats.end()) {
RTC_LOG(LS_WARNING) << "Format " << drm_format
<< " not supported for modifiers.";
return {DRM_FORMAT_MOD_INVALID};
}
success = EglQueryDmaBufModifiersEXT(egl_.display, drm_format, 0, nullptr,
nullptr, &count);
if (!success || !count) {
RTC_LOG(LS_WARNING) << "Cannot query the number of modifiers.";
return {DRM_FORMAT_MOD_INVALID};
}
std::vector<uint64_t> modifiers(count);
if (!EglQueryDmaBufModifiersEXT(egl_.display, drm_format, count,
modifiers.data(), nullptr, &count)) {
RTC_LOG(LS_WARNING) << "Cannot query a list of modifiers.";
}
// Support modifier-less buffers
modifiers.push_back(DRM_FORMAT_MOD_INVALID);
return modifiers;
}
std::optional<std::string> EglDmaBuf::GetRenderNode() {
int max_devices = drmGetDevices2(0, nullptr, 0);
if (max_devices <= 0) {
RTC_LOG(LS_ERROR) << "drmGetDevices2() has not found any devices (errno="
<< -max_devices << ")";
return std::nullopt;
}
std::vector<drmDevicePtr> devices(max_devices);
int ret = drmGetDevices2(0, devices.data(), max_devices);
if (ret < 0) {
RTC_LOG(LS_ERROR) << "drmGetDevices2() returned an error " << ret;
return std::nullopt;
}
std::string render_node;
for (const drmDevicePtr& device : devices) {
if (device->available_nodes & (1 << DRM_NODE_RENDER)) {
render_node = device->nodes[DRM_NODE_RENDER];
break;
}
}
drmFreeDevices(devices.data(), ret);
return render_node;
}
} // namespace webrtc