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gstreamer/gst-libs/gst/gl/egl/gsteglimage.c
Matthew Waters 51f2d05ff6 gl/docs: add to new docs system
2019-05-21 01:49:48 +00:00

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/*
* GStreamer
* Copyright (C) 2012 Collabora Ltd.
* @author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
* Copyright (C) 2014 Julien Isorce <julien.isorce@gmail.com>
* Copyright (C) 2016 Matthew Waters <matthew@centricular.com>
*
* 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.
*/
/**
* SECTION:gsteglimage
* @short_description: EGLImage abstraction
* @title: GstEGLImage
* @see_also: #GstGLMemoryEGL, #GstGLContext
*
* #GstEGLImage represents and holds an `EGLImage` handle.
*
* A #GstEGLImage can be created from a dmabuf with gst_egl_image_from_dmabuf(),
* or gst_egl_image_from_dmabuf_direct(), or #GstGLMemoryEGL provides a
* #GstAllocator to allocate `EGLImage`'s bound to and OpenGL texture.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gsteglimage.h"
#include <string.h>
#include <gst/gl/gstglfeature.h>
#include <gst/gl/gstglmemory.h>
#include "gst/gl/egl/gstegl.h"
#include "gst/gl/egl/gstglcontext_egl.h"
#include "gst/gl/egl/gstgldisplay_egl.h"
#if GST_GL_HAVE_DMABUF
#include <gst/allocators/gstdmabuf.h>
#include <libdrm/drm_fourcc.h>
#ifndef DRM_FORMAT_R8
#define DRM_FORMAT_R8 fourcc_code('R', '8', ' ', ' ')
#endif
#ifndef DRM_FORMAT_RG88
#define DRM_FORMAT_RG88 fourcc_code('R', 'G', '8', '8')
#endif
#ifndef DRM_FORMAT_GR88
#define DRM_FORMAT_GR88 fourcc_code('G', 'R', '8', '8')
#endif
#ifndef DRM_FORMAT_NV24
#define DRM_FORMAT_NV24 fourcc_code('N', 'V', '2', '4')
#endif
#endif
#ifndef EGL_LINUX_DMA_BUF_EXT
#define EGL_LINUX_DMA_BUF_EXT 0x3270
#endif
#ifndef EGL_LINUX_DRM_FOURCC_EXT
#define EGL_LINUX_DRM_FOURCC_EXT 0x3271
#endif
#ifndef EGL_DMA_BUF_PLANE0_FD_EXT
#define EGL_DMA_BUF_PLANE0_FD_EXT 0x3272
#endif
#ifndef EGL_DMA_BUF_PLANE0_OFFSET_EXT
#define EGL_DMA_BUF_PLANE0_OFFSET_EXT 0x3273
#endif
#ifndef EGL_DMA_BUF_PLANE0_PITCH_EXT
#define EGL_DMA_BUF_PLANE0_PITCH_EXT 0x3274
#endif
#ifndef EGL_DMA_BUF_PLANE1_FD_EXT
#define EGL_DMA_BUF_PLANE1_FD_EXT 0x3275
#endif
#ifndef EGL_DMA_BUF_PLANE1_OFFSET_EXT
#define EGL_DMA_BUF_PLANE1_OFFSET_EXT 0x3276
#endif
#ifndef EGL_DMA_BUF_PLANE1_PITCH_EXT
#define EGL_DMA_BUF_PLANE1_PITCH_EXT 0x3277
#endif
#ifndef EGL_DMA_BUF_PLANE2_FD_EXT
#define EGL_DMA_BUF_PLANE2_FD_EXT 0x3278
#endif
#ifndef EGL_DMA_BUF_PLANE2_OFFSET_EXT
#define EGL_DMA_BUF_PLANE2_OFFSET_EXT 0x3279
#endif
#ifndef EGL_DMA_BUF_PLANE2_PITCH_EXT
#define EGL_DMA_BUF_PLANE2_PITCH_EXT 0x327A
#endif
#ifndef DRM_FORMAT_MOD_LINEAR
#define DRM_FORMAT_MOD_LINEAR 0ULL
#endif
#ifndef EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT
#define EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT 0x3443
#endif
#ifndef EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT
#define EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT 0x3444
#endif
#ifndef EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT
#define EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT 0x3445
#endif
#ifndef EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT
#define EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT 0x3446
#endif
#ifndef EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT
#define EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT 0x3447
#endif
#ifndef EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT
#define EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT 0x3448
#endif
#ifndef EGL_ITU_REC601_EXT
#define EGL_ITU_REC601_EXT 0x327F
#endif
#ifndef EGL_ITU_REC709_EXT
#define EGL_ITU_REC709_EXT 0x3280
#endif
#ifndef EGL_ITU_REC2020_EXT
#define EGL_ITU_REC2020_EXT 0x3281
#endif
#ifndef EGL_SAMPLE_RANGE_HINT_EXT
#define EGL_SAMPLE_RANGE_HINT_EXT 0x327C
#endif
#ifndef EGL_YUV_COLOR_SPACE_HINT_EXT
#define EGL_YUV_COLOR_SPACE_HINT_EXT 0x327B
#endif
#ifndef EGL_YUV_FULL_RANGE_EXT
#define EGL_YUV_FULL_RANGE_EXT 0x3282
#endif
#ifndef EGL_YUV_NARROW_RANGE_EXT
#define EGL_YUV_NARROW_RANGE_EXT 0x3283
#endif
#if !GST_GL_HAVE_EGLUINT64KHR
typedef khronos_uint64_t EGLuint64KHR;
#endif
GST_DEFINE_MINI_OBJECT_TYPE (GstEGLImage, gst_egl_image);
#ifndef GST_DISABLE_GST_DEBUG
#define GST_CAT_DEFAULT gst_egl_image_ensure_debug_category()
static GstDebugCategory *
gst_egl_image_ensure_debug_category (void)
{
static gsize cat_gonce = 0;
if (g_once_init_enter (&cat_gonce)) {
GstDebugCategory *cat = NULL;
GST_DEBUG_CATEGORY_INIT (cat, "gleglimage", 0, "EGLImage wrapper");
g_once_init_leave (&cat_gonce, (gsize) cat);
}
return (GstDebugCategory *) cat_gonce;
}
#endif /* GST_DISABLE_GST_DEBUG */
/**
* gst_egl_image_get_image:
* @image: a #GstEGLImage
*
* Returns: the `EGLImage` of @image
*/
gpointer
gst_egl_image_get_image (GstEGLImage * image)
{
g_return_val_if_fail (GST_IS_EGL_IMAGE (image), EGL_NO_IMAGE_KHR);
return image->image;
}
static void
_gst_egl_image_free_thread (GstGLContext * context, GstEGLImage * image)
{
if (image->destroy_notify)
image->destroy_notify (image, image->destroy_data);
}
static void
_gst_egl_image_free (GstMiniObject * object)
{
GstEGLImage *image = GST_EGL_IMAGE (object);
if (image->context) {
gst_gl_context_thread_add (GST_GL_CONTEXT (image->context),
(GstGLContextThreadFunc) _gst_egl_image_free_thread, image);
gst_object_unref (image->context);
}
}
static GstMiniObject *
_gst_egl_image_copy (GstMiniObject * obj)
{
return gst_mini_object_ref (obj);
}
/**
* gst_egl_image_new_wrapped:
* @context: a #GstGLContext (must be an EGL context)
* @image: the image to wrap
* @format: the #GstGLFormat
* @user_data: user data
* @user_data_destroy: (destroy user_data): called when @user_data is no longer needed
*
* Returns: a new #GstEGLImage wrapping @image
*/
GstEGLImage *
gst_egl_image_new_wrapped (GstGLContext * context, gpointer image,
GstGLFormat format, gpointer user_data,
GstEGLImageDestroyNotify user_data_destroy)
{
GstEGLImage *img = NULL;
g_return_val_if_fail (context != NULL, NULL);
g_return_val_if_fail ((gst_gl_context_get_gl_platform (context) &
GST_GL_PLATFORM_EGL) != 0, NULL);
g_return_val_if_fail (image != EGL_NO_IMAGE_KHR, NULL);
img = g_new0 (GstEGLImage, 1);
gst_mini_object_init (GST_MINI_OBJECT_CAST (img), 0, GST_TYPE_EGL_IMAGE,
(GstMiniObjectCopyFunction) _gst_egl_image_copy, NULL,
(GstMiniObjectFreeFunction) _gst_egl_image_free);
img->context = gst_object_ref (context);
img->image = image;
img->format = format;
img->destroy_data = user_data;
img->destroy_notify = user_data_destroy;
return img;
}
static EGLImageKHR
_gst_egl_image_create (GstGLContext * context, guint target,
EGLClientBuffer buffer, guintptr * attribs)
{
EGLDisplay egl_display = EGL_DEFAULT_DISPLAY;
EGLContext egl_context = EGL_NO_CONTEXT;
EGLImageKHR img = EGL_NO_IMAGE_KHR;
GstGLDisplayEGL *display_egl;
gint plat_major, plat_minor;
guint attrib_len = 0;
gst_gl_context_get_gl_platform_version (context, &plat_major, &plat_minor);
display_egl = gst_gl_display_egl_from_gl_display (context->display);
if (!display_egl) {
GST_WARNING_OBJECT (context, "Failed to retrieve GstGLDisplayEGL from %"
GST_PTR_FORMAT, context->display);
return EGL_NO_IMAGE_KHR;
}
egl_display =
(EGLDisplay) gst_gl_display_get_handle (GST_GL_DISPLAY (display_egl));
gst_object_unref (display_egl);
if (target != EGL_LINUX_DMA_BUF_EXT)
egl_context = (EGLContext) gst_gl_context_get_gl_context (context);
if (attribs)
while (attribs[attrib_len++] != EGL_NONE) {
}
#ifdef EGL_VERSION_1_5
if (GST_GL_CHECK_GL_VERSION (plat_major, plat_minor, 1, 5)) {
EGLImageKHR (*gst_eglCreateImage) (EGLDisplay dpy, EGLContext ctx,
EGLenum target, EGLClientBuffer buffer, const EGLAttrib * attrib_list);
EGLAttrib *egl_attribs = NULL;
guint i;
gst_eglCreateImage = gst_gl_context_get_proc_address (context,
"eglCreateImage");
if (!gst_eglCreateImage) {
GST_ERROR_OBJECT (context, "\"eglCreateImage\" not exposed by the "
"implementation as required by EGL >= 1.5");
return EGL_NO_IMAGE_KHR;
}
if (attribs) {
egl_attribs = g_new0 (EGLAttrib, attrib_len);
for (i = 0; i < attrib_len; i++)
egl_attribs[i] = (EGLAttrib) attribs[i];
}
img = gst_eglCreateImage (egl_display, egl_context, target, buffer,
egl_attribs);
g_free (egl_attribs);
} else
#endif
{
EGLImageKHR (*gst_eglCreateImageKHR) (EGLDisplay dpy, EGLContext ctx,
EGLenum target, EGLClientBuffer buffer, const EGLint * attrib_list);
EGLint *egl_attribs = NULL;
gint i;
gst_eglCreateImageKHR = gst_gl_context_get_proc_address (context,
"eglCreateImageKHR");
if (!gst_eglCreateImageKHR) {
GST_WARNING_OBJECT (context, "\"eglCreateImageKHR\" not exposed by the "
"implementation");
return EGL_NO_IMAGE_KHR;
}
if (attribs) {
egl_attribs = g_new0 (EGLint, attrib_len);
for (i = 0; i < attrib_len; i++)
egl_attribs[i] = (EGLint) attribs[i];
}
img = gst_eglCreateImageKHR (egl_display, egl_context, target, buffer,
egl_attribs);
g_free (egl_attribs);
}
return img;
}
static void
_gst_egl_image_destroy (GstGLContext * context, EGLImageKHR image)
{
EGLBoolean (*gst_eglDestroyImage) (EGLDisplay dpy, EGLImageKHR image);
EGLDisplay egl_display = EGL_DEFAULT_DISPLAY;
GstGLDisplayEGL *display_egl;
gst_eglDestroyImage = gst_gl_context_get_proc_address (context,
"eglDestroyImage");
if (!gst_eglDestroyImage) {
gst_eglDestroyImage = gst_gl_context_get_proc_address (context,
"eglDestroyImageKHR");
if (!gst_eglDestroyImage) {
GST_ERROR_OBJECT (context, "\"eglDestroyImage\" not exposed by the "
"implementation");
return;
}
}
display_egl = gst_gl_display_egl_from_gl_display (context->display);
if (!display_egl) {
GST_WARNING_OBJECT (context, "Failed to retrieve GstGLDisplayEGL from %"
GST_PTR_FORMAT, context->display);
return;
}
egl_display =
(EGLDisplay) gst_gl_display_get_handle (GST_GL_DISPLAY (display_egl));
gst_object_unref (display_egl);
if (!gst_eglDestroyImage (egl_display, image))
GST_WARNING_OBJECT (context, "eglDestroyImage failed");
}
static void
_destroy_egl_image (GstEGLImage * image, gpointer user_data)
{
_gst_egl_image_destroy (image->context, image->image);
}
/**
* gst_egl_image_from_texture:
* @context: a #GstGLContext (must be an EGL context)
* @gl_mem: a #GstGLMemory
* @attribs: additional attributes to add to the `eglCreateImage`() call.
*
* Returns: (transfer full): a #GstEGLImage wrapping @gl_mem or %NULL on failure
*/
GstEGLImage *
gst_egl_image_from_texture (GstGLContext * context, GstGLMemory * gl_mem,
guintptr * attribs)
{
EGLenum egl_target;
EGLImageKHR img;
if (gl_mem->tex_target != GST_GL_TEXTURE_TARGET_2D) {
GST_FIXME_OBJECT (context, "Only know how to create EGLImage's from 2D "
"textures");
return NULL;
}
egl_target = EGL_GL_TEXTURE_2D_KHR;
img = _gst_egl_image_create (context, egl_target,
(EGLClientBuffer) (guintptr) gl_mem->tex_id, attribs);
if (!img)
return NULL;
return gst_egl_image_new_wrapped (context, img, gl_mem->tex_format, NULL,
(GstEGLImageDestroyNotify) _destroy_egl_image);
}
#if GST_GL_HAVE_DMABUF
/*
* GStreamer format descriptions differ from DRM formats as the representation
* is relative to a register, hence in native endianness. To reduce the driver
* requirement, we only import with a subset of texture formats and use
* shaders to convert. This way we avoid having to use external texture
* target.
*/
static int
_drm_rgba_fourcc_from_info (GstVideoInfo * info, int plane,
GstGLFormat * out_format)
{
GstVideoFormat format = GST_VIDEO_INFO_FORMAT (info);
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
const gint rgba_fourcc = DRM_FORMAT_ABGR8888;
const gint rgb_fourcc = DRM_FORMAT_BGR888;
const gint rg_fourcc = DRM_FORMAT_GR88;
#else
const gint rgba_fourcc = DRM_FORMAT_RGBA8888;
const gint rgb_fourcc = DRM_FORMAT_RGB888;
const gint rg_fourcc = DRM_FORMAT_RG88;
#endif
GST_DEBUG ("Getting DRM fourcc for %s plane %i",
gst_video_format_to_string (format), plane);
switch (format) {
case GST_VIDEO_FORMAT_RGB16:
case GST_VIDEO_FORMAT_BGR16:
*out_format = GST_GL_RGB565;
return DRM_FORMAT_RGB565;
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
*out_format = GST_GL_RGB;
return rgb_fourcc;
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRA:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_ABGR:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_AYUV:
*out_format = GST_GL_RGBA;
return rgba_fourcc;
case GST_VIDEO_FORMAT_GRAY8:
*out_format = GST_GL_RED;
return DRM_FORMAT_R8;
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_GRAY16_LE:
case GST_VIDEO_FORMAT_GRAY16_BE:
*out_format = GST_GL_RG;
return rg_fourcc;
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
*out_format = plane == 0 ? GST_GL_RED : GST_GL_RG;
return plane == 0 ? DRM_FORMAT_R8 : rg_fourcc;
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_Y41B:
case GST_VIDEO_FORMAT_Y42B:
case GST_VIDEO_FORMAT_Y444:
*out_format = GST_GL_RED;
return DRM_FORMAT_R8;
default:
GST_ERROR ("Unsupported format for DMABuf.");
return -1;
}
}
/**
* gst_egl_image_from_dmabuf:
* @context: a #GstGLContext (must be an EGL context)
* @dmabuf: the DMA-Buf file descriptor
* @in_info: the #GstVideoInfo in @dmabuf
* @plane: the plane in @in_info to create and #GstEGLImage for
* @offset: the byte-offset in the data
*
* Creates an EGL image that imports the dmabuf FD. The dmabuf data
* is passed as RGBA data. Shaders later take this "RGBA" data and
* convert it from its true format (described by in_info) to actual
* RGBA output. For example, with I420, three EGL images are created,
* one for each plane, each EGL image with a single-channel R format.
* With NV12, two EGL images are created, one with R format, one
* with RG format etc.
*
* Returns: a #GstEGLImage wrapping @dmabuf or %NULL on failure
*/
GstEGLImage *
gst_egl_image_from_dmabuf (GstGLContext * context,
gint dmabuf, GstVideoInfo * in_info, gint plane, gsize offset)
{
GstGLFormat format = 0;
guintptr attribs[13];
EGLImageKHR img;
gint atti = 0;
gint fourcc;
gint i;
fourcc = _drm_rgba_fourcc_from_info (in_info, plane, &format);
GST_DEBUG ("fourcc %.4s (%d) plane %d (%dx%d)",
(char *) &fourcc, fourcc, plane,
GST_VIDEO_INFO_COMP_WIDTH (in_info, plane),
GST_VIDEO_INFO_COMP_HEIGHT (in_info, plane));
attribs[atti++] = EGL_WIDTH;
attribs[atti++] = GST_VIDEO_INFO_COMP_WIDTH (in_info, plane);
attribs[atti++] = EGL_HEIGHT;
attribs[atti++] = GST_VIDEO_INFO_COMP_HEIGHT (in_info, plane);
attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
attribs[atti++] = fourcc;
attribs[atti++] = EGL_DMA_BUF_PLANE0_FD_EXT;
attribs[atti++] = dmabuf;
attribs[atti++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
attribs[atti++] = offset;
attribs[atti++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
attribs[atti++] = GST_VIDEO_INFO_PLANE_STRIDE (in_info, plane);
attribs[atti] = EGL_NONE;
g_assert (atti == G_N_ELEMENTS (attribs) - 1);
for (i = 0; i < atti; i++)
GST_LOG ("attr %i: %" G_GINTPTR_FORMAT, i, attribs[i]);
img = _gst_egl_image_create (context, EGL_LINUX_DMA_BUF_EXT, NULL, attribs);
if (!img) {
GST_WARNING ("eglCreateImage failed: %s",
gst_egl_get_error_string (eglGetError ()));
return NULL;
}
return gst_egl_image_new_wrapped (context, img, format, NULL,
(GstEGLImageDestroyNotify) _destroy_egl_image);
}
/*
* Variant of _drm_rgba_fourcc_from_info() that is used in case the GPU can
* handle YUV formats directly (by using internal shaders, or hardwired
* YUV->RGB conversion matrices etc.)
*/
static int
_drm_direct_fourcc_from_info (GstVideoInfo * info)
{
GstVideoFormat format = GST_VIDEO_INFO_FORMAT (info);
GST_DEBUG ("Getting DRM fourcc for %s", gst_video_format_to_string (format));
switch (format) {
case GST_VIDEO_FORMAT_YUY2:
return DRM_FORMAT_YUYV;
case GST_VIDEO_FORMAT_YVYU:
return DRM_FORMAT_YVYU;
case GST_VIDEO_FORMAT_UYVY:
return DRM_FORMAT_UYVY;
case GST_VIDEO_FORMAT_VYUY:
return DRM_FORMAT_VYUY;
case GST_VIDEO_FORMAT_AYUV:
return DRM_FORMAT_AYUV;
case GST_VIDEO_FORMAT_NV12:
return DRM_FORMAT_NV12;
case GST_VIDEO_FORMAT_NV21:
return DRM_FORMAT_NV21;
case GST_VIDEO_FORMAT_NV16:
return DRM_FORMAT_NV16;
case GST_VIDEO_FORMAT_NV61:
return DRM_FORMAT_NV61;
case GST_VIDEO_FORMAT_NV24:
return DRM_FORMAT_NV24;
case GST_VIDEO_FORMAT_YUV9:
return DRM_FORMAT_YUV410;
case GST_VIDEO_FORMAT_YVU9:
return DRM_FORMAT_YVU410;
case GST_VIDEO_FORMAT_Y41B:
return DRM_FORMAT_YUV411;
case GST_VIDEO_FORMAT_I420:
return DRM_FORMAT_YUV420;
case GST_VIDEO_FORMAT_YV12:
return DRM_FORMAT_YVU420;
case GST_VIDEO_FORMAT_Y42B:
return DRM_FORMAT_YUV422;
case GST_VIDEO_FORMAT_Y444:
return DRM_FORMAT_YUV444;
case GST_VIDEO_FORMAT_RGB16:
return DRM_FORMAT_RGB565;
case GST_VIDEO_FORMAT_BGR16:
return DRM_FORMAT_BGR565;
case GST_VIDEO_FORMAT_RGBA:
return DRM_FORMAT_ABGR8888;
case GST_VIDEO_FORMAT_RGBx:
return DRM_FORMAT_XBGR8888;
case GST_VIDEO_FORMAT_BGRA:
return DRM_FORMAT_ARGB8888;
case GST_VIDEO_FORMAT_BGRx:
return DRM_FORMAT_XRGB8888;
case GST_VIDEO_FORMAT_ARGB:
return DRM_FORMAT_BGRA8888;
case GST_VIDEO_FORMAT_xRGB:
return DRM_FORMAT_BGRX8888;
case GST_VIDEO_FORMAT_ABGR:
return DRM_FORMAT_RGBA8888;
case GST_VIDEO_FORMAT_xBGR:
return DRM_FORMAT_RGBX8888;
default:
GST_INFO ("Unsupported format for direct DMABuf.");
return -1;
}
}
static gboolean
_gst_egl_image_check_dmabuf_direct (GstGLContext * context, int fourcc)
{
EGLDisplay egl_display = EGL_DEFAULT_DISPLAY;
GstGLDisplayEGL *display_egl;
EGLint *formats;
EGLint num_formats;
EGLuint64KHR *modifiers;
EGLBoolean *external_only;
int num_modifiers;
gboolean ret;
int i;
EGLBoolean (*gst_eglQueryDmaBufFormatsEXT) (EGLDisplay dpy,
EGLint max_formats, EGLint * formats, EGLint * num_formats);
EGLBoolean (*gst_eglQueryDmaBufModifiersEXT) (EGLDisplay dpy,
int format, int max_modifiers, EGLuint64KHR * modifiers,
EGLBoolean * external_only, int *num_modifiers);
gst_eglQueryDmaBufFormatsEXT =
gst_gl_context_get_proc_address (context, "eglQueryDmaBufFormatsEXT");
gst_eglQueryDmaBufModifiersEXT =
gst_gl_context_get_proc_address (context, "eglQueryDmaBufModifiersEXT");
if (!gst_eglQueryDmaBufFormatsEXT || !gst_eglQueryDmaBufModifiersEXT)
return FALSE;
display_egl = gst_gl_display_egl_from_gl_display (context->display);
if (!display_egl) {
GST_WARNING_OBJECT (context,
"Failed to retrieve GstGLDisplayEGL from %" GST_PTR_FORMAT,
context->display);
return FALSE;
}
egl_display =
(EGLDisplay) gst_gl_display_get_handle (GST_GL_DISPLAY (display_egl));
gst_object_unref (display_egl);
ret = gst_eglQueryDmaBufFormatsEXT (egl_display, 0, NULL, &num_formats);
if (!ret || num_formats == 0)
return FALSE;
formats = g_new (EGLint, num_formats);
ret = gst_eglQueryDmaBufFormatsEXT (egl_display, num_formats, formats,
&num_formats);
if (!ret || num_formats == 0) {
g_free (formats);
return FALSE;
}
for (i = 0; i < num_formats; i++) {
if (formats[i] == fourcc)
break;
}
g_free (formats);
if (i == num_formats) {
GST_DEBUG ("driver does not support importing fourcc %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (fourcc));
return FALSE;
}
ret = gst_eglQueryDmaBufModifiersEXT (egl_display, fourcc, 0, NULL, NULL,
&num_modifiers);
if (!ret || num_modifiers == 0) {
GST_DEBUG ("driver does not report modifiers for fourcc %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc));
return FALSE;
}
modifiers = g_new (EGLuint64KHR, num_modifiers);
external_only = g_new (EGLBoolean, num_modifiers);
ret = gst_eglQueryDmaBufModifiersEXT (egl_display, fourcc, num_modifiers,
modifiers, external_only, &num_modifiers);
if (!ret || num_modifiers == 0) {
g_free (modifiers);
g_free (external_only);
return FALSE;
}
for (i = 0; i < num_modifiers; ++i) {
if (modifiers[i] == DRM_FORMAT_MOD_LINEAR) {
if (external_only[i]) {
GST_DEBUG ("driver only supports external import of fourcc %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc));
}
ret = !external_only[i];
g_free (modifiers);
g_free (external_only);
return ret;
}
}
GST_DEBUG ("driver only supports non-linear import of fourcc %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc));
g_free (modifiers);
g_free (external_only);
return FALSE;
}
/**
* gst_egl_image_from_dmabuf_direct:
* @context: a #GstGLContext (must be an EGL context)
* @fd: Array of DMABuf file descriptors
* @offset: Array of offsets, relative to the DMABuf
* @in_info: the #GstVideoInfo
*
* Creates an EGL image that imports the dmabuf FD. The dmabuf data
* is passed directly as the format described in in_info. This is
* useful if the hardware is capable of performing color space conversions
* internally. The appropriate DRM format is picked, and the EGL image
* is created with this DRM format.
*
* Another notable difference to gst_egl_image_from_dmabuf()
* is that this function creates one EGL image for all planes, not one for
* a single plane.
*
* Returns: a #GstEGLImage wrapping @dmabuf or %NULL on failure
*/
GstEGLImage *
gst_egl_image_from_dmabuf_direct (GstGLContext * context,
gint * fd, gsize * offset, GstVideoInfo * in_info)
{
EGLImageKHR img;
guint n_planes = GST_VIDEO_INFO_N_PLANES (in_info);
gint fourcc;
gint i;
gboolean with_modifiers;
/* Explanation of array length:
* - 6 plane independent values are at the start (width, height, format FourCC)
* - 10 values per plane, and there are up to MAX_NUM_DMA_BUF_PLANES planes
* - 4 values for color space and range
* - 1 extra value for the EGL_NONE sentinel
*/
guintptr attribs[41]; /* 6 + 10 * 3 + 4 + 1 */
gint atti = 0;
fourcc = _drm_direct_fourcc_from_info (in_info);
if (fourcc == -1)
return NULL;
if (!_gst_egl_image_check_dmabuf_direct (context, fourcc))
return NULL;
with_modifiers = gst_gl_context_check_feature (context,
"EGL_EXT_image_dma_buf_import_with_modifiers");
/* EGL DMABuf importation supports a maximum of 3 planes */
if (G_UNLIKELY (n_planes > 3))
return NULL;
attribs[atti++] = EGL_WIDTH;
attribs[atti++] = GST_VIDEO_INFO_WIDTH (in_info);
attribs[atti++] = EGL_HEIGHT;
attribs[atti++] = GST_VIDEO_INFO_HEIGHT (in_info);
attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
attribs[atti++] = fourcc;
/* first plane */
{
attribs[atti++] = EGL_DMA_BUF_PLANE0_FD_EXT;
attribs[atti++] = fd[0];
attribs[atti++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
attribs[atti++] = offset[0];
attribs[atti++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
attribs[atti++] = in_info->stride[0];
if (with_modifiers) {
attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
attribs[atti++] = DRM_FORMAT_MOD_LINEAR & 0xffffffff;
attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
attribs[atti++] = (DRM_FORMAT_MOD_LINEAR >> 32) & 0xffffffff;
}
}
/* second plane */
if (n_planes >= 2) {
attribs[atti++] = EGL_DMA_BUF_PLANE1_FD_EXT;
attribs[atti++] = fd[1];
attribs[atti++] = EGL_DMA_BUF_PLANE1_OFFSET_EXT;
attribs[atti++] = offset[1];
attribs[atti++] = EGL_DMA_BUF_PLANE1_PITCH_EXT;
attribs[atti++] = in_info->stride[1];
if (with_modifiers) {
attribs[atti++] = EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT;
attribs[atti++] = DRM_FORMAT_MOD_LINEAR & 0xffffffff;
attribs[atti++] = EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT;
attribs[atti++] = (DRM_FORMAT_MOD_LINEAR >> 32) & 0xffffffff;
}
}
/* third plane */
if (n_planes == 3) {
attribs[atti++] = EGL_DMA_BUF_PLANE2_FD_EXT;
attribs[atti++] = fd[2];
attribs[atti++] = EGL_DMA_BUF_PLANE2_OFFSET_EXT;
attribs[atti++] = offset[2];
attribs[atti++] = EGL_DMA_BUF_PLANE2_PITCH_EXT;
attribs[atti++] = in_info->stride[2];
if (with_modifiers) {
attribs[atti++] = EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT;
attribs[atti++] = DRM_FORMAT_MOD_LINEAR & 0xffffffff;
attribs[atti++] = EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT;
attribs[atti++] = (DRM_FORMAT_MOD_LINEAR >> 32) & 0xffffffff;
}
}
{
uint32_t color_space;
switch (in_info->colorimetry.matrix) {
case GST_VIDEO_COLOR_MATRIX_BT601:
color_space = EGL_ITU_REC601_EXT;
break;
case GST_VIDEO_COLOR_MATRIX_BT709:
color_space = EGL_ITU_REC709_EXT;
break;
case GST_VIDEO_COLOR_MATRIX_BT2020:
color_space = EGL_ITU_REC2020_EXT;
break;
default:
color_space = 0;
break;
}
if (color_space != 0) {
attribs[atti++] = EGL_YUV_COLOR_SPACE_HINT_EXT;
attribs[atti++] = color_space;
}
}
{
uint32_t range;
switch (in_info->colorimetry.range) {
case GST_VIDEO_COLOR_RANGE_0_255:
range = EGL_YUV_FULL_RANGE_EXT;
break;
case GST_VIDEO_COLOR_RANGE_16_235:
range = EGL_YUV_NARROW_RANGE_EXT;
break;
default:
range = 0;
break;
}
if (range != 0) {
attribs[atti++] = EGL_SAMPLE_RANGE_HINT_EXT;
attribs[atti++] = range;
}
}
/* Add the EGL_NONE sentinel */
attribs[atti] = EGL_NONE;
g_assert (atti <= G_N_ELEMENTS (attribs) - 1);
for (i = 0; i < atti; i++)
GST_LOG ("attr %i: %" G_GINTPTR_FORMAT, i, attribs[i]);
img = _gst_egl_image_create (context, EGL_LINUX_DMA_BUF_EXT, NULL, attribs);
if (!img) {
GST_WARNING ("eglCreateImage failed: %s",
gst_egl_get_error_string (eglGetError ()));
return NULL;
}
return gst_egl_image_new_wrapped (context, img, GST_GL_RGBA, NULL,
(GstEGLImageDestroyNotify) _destroy_egl_image);
}
gboolean
gst_egl_image_export_dmabuf (GstEGLImage * image, int *fd, gint * stride,
gsize * offset)
{
EGLBoolean (*gst_eglExportDMABUFImageQueryMESA) (EGLDisplay dpy,
EGLImageKHR image, int *fourcc, int *num_planes,
EGLuint64KHR * modifiers);
EGLBoolean (*gst_eglExportDMABUFImageMESA) (EGLDisplay dpy, EGLImageKHR image,
int *fds, EGLint * strides, EGLint * offsets);
GstGLDisplayEGL *display_egl;
EGLDisplay egl_display = EGL_DEFAULT_DISPLAY;
int num_planes = 0;
int egl_fd = 0;
EGLint egl_stride = 0;
EGLint egl_offset = 0;
gst_eglExportDMABUFImageQueryMESA =
gst_gl_context_get_proc_address (image->context,
"eglExportDMABUFImageQueryMESA");
gst_eglExportDMABUFImageMESA =
gst_gl_context_get_proc_address (image->context,
"eglExportDMABUFImageMESA");
if (!gst_eglExportDMABUFImageQueryMESA || !gst_eglExportDMABUFImageMESA)
return FALSE;
display_egl =
(GstGLDisplayEGL *) gst_gl_display_egl_from_gl_display (image->
context->display);
if (!display_egl) {
GST_WARNING_OBJECT (image->context,
"Failed to retrieve GstGLDisplayEGL from %" GST_PTR_FORMAT,
image->context->display);
return FALSE;
}
egl_display =
(EGLDisplay) gst_gl_display_get_handle (GST_GL_DISPLAY (display_egl));
gst_object_unref (display_egl);
if (!gst_eglExportDMABUFImageQueryMESA (egl_display, image->image,
NULL, &num_planes, NULL))
return FALSE;
/* Don't allow multi-plane dmabufs */
if (num_planes > 1)
return FALSE;
if (!gst_eglExportDMABUFImageMESA (egl_display, image->image, &egl_fd,
&egl_stride, &egl_offset))
return FALSE;
*fd = egl_fd;
*stride = egl_stride;
*offset = egl_offset;
return TRUE;
}
#endif /* GST_GL_HAVE_DMABUF */
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