eglglessink: Add support for allocating EGLImages on Mali

This allows to decoders and other upstream elements to do zero-copy to the sink.
2024-12-19 06:46:38 +00:00 · 2012-12-28 12:27:43 +01:00 · 2012-12-28 12:27:43 +01:00 · 4df3e56c9a
commit 4df3e56c9a
parent 21d9fe45e4
4 changed files with 1983 additions and 516 deletions
--- a/ext/eglgles/gsteglglessink.c
+++ b/ext/eglgles/gsteglglessink.c
--- a/ext/eglgles/gsteglglessink.h
+++ b/ext/eglgles/gsteglglessink.h
@ -56,6 +56,8 @@
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>

+#include "video_platform_wrapper.h"
+
 G_BEGIN_DECLS
 #define GST_TYPE_EGLGLESSINK \
  (gst_eglglessink_get_type())
@ -124,9 +126,9 @@ struct _GstEglGlesRenderContext
  EGLNativeWindowType window, used_window;
  EGLSurface surface;
  gboolean buffer_preserved;
-  GLuint fragshader[3]; /* frame, border, frame-platform */
-  GLuint vertshader[3]; /* frame, border, frame-platform */
-  GLuint glslprogram[3]; /* frame, border, frame-platform */
+  GLuint fragshader[2]; /* frame, border */
+  GLuint vertshader[2]; /* frame, border */
+  GLuint glslprogram[2]; /* frame, border */
  GLuint texture[3]; /* RGB/Y, U/UV, V */
  EGLint surface_width;
  EGLint surface_height;
@ -135,13 +137,19 @@ struct _GstEglGlesRenderContext
  gint n_textures;

  /* shader vars */
-  GLuint position_loc[3]; /* frame, border, frame-platform */
-  GLuint texpos_loc[2]; /* frame, frame-platform */
-  GLuint tex_scale_loc[2][3]; /* [frame, frame-platform] RGB/Y, U/UV, V */
-  GLuint tex_loc[2][3]; /* [frame, frame-platform] RGB/Y, U/UV, V */
+  GLuint position_loc[2]; /* frame, border */
+  GLuint texpos_loc[2]; /* frame */
+  GLuint tex_scale_loc[1][3]; /* [frame] RGB/Y, U/UV, V */
+  GLuint tex_loc[1][3]; /* [frame] RGB/Y, U/UV, V */
  coord5 position_array[12];    /* 4 x Frame, 4 x Border1, 4 x Border2 */
  unsigned short index_array[4];
  unsigned int position_buffer, index_buffer;
+
+  gboolean can_map_eglimage;
+  GstMemoryMapFunction eglimage_map;
+  GstMemoryUnmapFunction eglimage_unmap;
+  PlatformMapVideo eglimage_video_map;
+  PlatformUnmapVideo eglimage_video_unmap;
 };

 /*
@ -201,6 +209,7 @@ struct _GstEglGlesSink
  GstCaps *current_caps, *configured_caps;
  GstVideoInfo configured_info;
  gfloat stride[3];
+  GstBufferPool *pool;

  GstEglGlesImageFmt *selected_fmt;
  GstEglGlesRenderContext eglglesctx;
--- a/ext/eglgles/video_platform_wrapper.c
+++ b/ext/eglgles/video_platform_wrapper.c
@ -47,10 +47,13 @@
 #endif

 #define EGL_EGLEXT_PROTOTYPES
-
+#define GL_GLEXT_PROTOTYPES
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 #include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <string.h>

 #include <gst/gst.h>
 #include "video_platform_wrapper.h"
@ -70,6 +73,7 @@ platform_wrapper_init (void)

 #ifdef USE_EGL_X11
 #include <X11/Xlib.h>
+#include <gst/video/gstvideopool.h>

 typedef struct
 {
@ -118,10 +122,45 @@ platform_destroy_native_window (EGLNativeDisplayType display,
  *window_data = NULL;
  return TRUE;
 }
+
+gboolean
+platform_can_map_eglimage (GstMemoryMapFunction * map,
+    GstMemoryUnmapFunction * unmap, PlatformMapVideo * video_map,
+    PlatformUnmapVideo * video_unmap)
+{
+  return FALSE;
+}
+
+gboolean
+platform_has_custom_eglimage_alloc (void)
+{
+  return FALSE;
+}
+
+gboolean
+platform_alloc_eglimage (EGLDisplay display, EGLContext context, GLint format,
+    GLint type, gint width, gint height, GLuint tex_id, EGLImageKHR * image,
+    gpointer * image_platform_data)
+{
+  g_assert_not_reached ();
+  return FALSE;
+}
+
+void
+platform_free_eglimage (EGLDisplay display, EGLContext context, GLuint tex_id,
+    EGLImageKHR * image, gpointer * image_platform_data)
+{
+  g_assert_not_reached ();
+}
 #endif

 #ifdef USE_EGL_MALI_FB
 #include <EGL/fbdev_window.h>
+#include <mali_egl_image.h>
+#include <ump/ump.h>
+#include <ump/ump_ref_drv.h>
+
+#include <gst/video/video.h>

 EGLNativeWindowType
 platform_create_native_window (gint width, gint height, gpointer * window_data)
@ -142,9 +181,438 @@ platform_destroy_native_window (EGLNativeDisplayType display,

  return TRUE;
 }
+
+static gpointer
+eglimage_map (GstMemory * gmem, gsize maxsize, GstMapFlags flags)
+{
+  GstEGLImageMemory *mem;
+  gint i;
+
+  g_return_val_if_fail (strcmp (gmem->allocator->mem_type,
+          GST_EGL_IMAGE_MEMORY_NAME) == 0, FALSE);
+
+  mem = GST_EGL_IMAGE_MEMORY (gmem);
+
+  g_mutex_lock (&mem->lock);
+  for (i = 0; i < mem->n_textures; i++) {
+    if (mem->memory_refcount[i]) {
+      /* Only multiple READ maps are allowed */
+      if ((mem->memory_flags[i] & GST_MAP_WRITE)) {
+        g_mutex_unlock (&mem->lock);
+        return NULL;
+      }
+    }
+  }
+
+  if (!mem->mapped_memory_refcount) {
+    EGLint attribs[] = {
+      MALI_EGL_IMAGE_PLANE, MALI_EGL_IMAGE_PLANE_Y,
+      MALI_EGL_IMAGE_ACCESS_MODE, MALI_EGL_IMAGE_ACCESS_READ_ONLY,
+      EGL_NONE
+    };
+    GstVideoInfo info;
+    mali_egl_image *mali_egl_image;
+    guint8 *plane_memory, *p;
+    gint stride, h;
+    gint j;
+
+    gst_video_info_set_format (&info, mem->format, mem->width, mem->height);
+
+    mem->mapped_memory = g_malloc (mem->parent.size);
+
+    for (i = 0; i < mem->n_textures; i++) {
+      mali_egl_image = mali_egl_image_lock_ptr (mem->image[i]);
+      if (!mali_egl_image) {
+        g_free (mem->mapped_memory);
+        GST_ERROR ("Failed to lock Mali EGL image: 0x%04x",
+            mali_egl_image_get_error ());
+        g_mutex_unlock (&mem->lock);
+        return NULL;
+      }
+      plane_memory = mali_egl_image_map_buffer (mali_egl_image, attribs);
+      if (!plane_memory) {
+        mali_egl_image_unlock_ptr (mem->image[i]);
+        g_free (mem->mapped_memory);
+        GST_ERROR ("Failed to lock Mali map image: 0x%04x",
+            mali_egl_image_get_error ());
+        g_mutex_unlock (&mem->lock);
+        return NULL;
+      }
+
+      p = ((guint8 *) mem->mapped_memory) + mem->offset[i];
+      stride = mem->stride[i];
+      h = GST_VIDEO_INFO_COMP_HEIGHT (&info, i);
+      for (j = 0; j < h; j++) {
+        memcpy (p, plane_memory, stride);
+        p += mem->stride[i];
+        plane_memory += mem->stride[i];
+      }
+
+      mali_egl_image_unmap_buffer (mem->image[i], attribs);
+      mali_egl_image_unlock_ptr (mem->image[i]);
+    }
+  } else {
+    /* Only multiple READ maps are allowed */
+    if ((mem->mapped_memory_flags & GST_MAP_WRITE)) {
+      g_mutex_unlock (&mem->lock);
+      return NULL;
+    }
+  }
+  mem->mapped_memory_refcount++;
+
+  g_mutex_unlock (&mem->lock);
+
+  return mem->mapped_memory;
+}
+
+static void
+eglimage_unmap (GstMemory * gmem)
+{
+  GstEGLImageMemory *mem;
+  gint i;
+
+  g_return_if_fail (strcmp (gmem->allocator->mem_type,
+          GST_EGL_IMAGE_MEMORY_NAME) == 0);
+
+  mem = GST_EGL_IMAGE_MEMORY (gmem);
+  g_return_if_fail (mem->mapped_memory);
+
+  g_mutex_lock (&mem->lock);
+
+  mem->mapped_memory_refcount--;
+  if (mem->mapped_memory_refcount > 0) {
+    g_mutex_unlock (&mem->lock);
+    return;
+  }
+
+  /* Write back */
+  if ((mem->mapped_memory_flags & GST_MAP_WRITE)) {
+    EGLint attribs[] = {
+      MALI_EGL_IMAGE_PLANE, MALI_EGL_IMAGE_PLANE_Y,
+      MALI_EGL_IMAGE_ACCESS_MODE, MALI_EGL_IMAGE_ACCESS_WRITE_ONLY,
+      EGL_NONE
+    };
+    GstVideoInfo info;
+    mali_egl_image *mali_egl_image;
+    guint8 *plane_memory, *p;
+    gint stride, h;
+    gint j;
+
+    gst_video_info_set_format (&info, mem->format, mem->width, mem->height);
+
+    for (i = 0; i < mem->n_textures; i++) {
+      mali_egl_image = mali_egl_image_lock_ptr (mem->image[i]);
+      if (!mali_egl_image) {
+        g_free (mem->mapped_memory);
+        GST_ERROR ("Failed to lock Mali EGL image: 0x%04x",
+            mali_egl_image_get_error ());
+        g_mutex_unlock (&mem->lock);
+        return;
+      }
+      plane_memory = mali_egl_image_map_buffer (mali_egl_image, attribs);
+      if (!plane_memory) {
+        mali_egl_image_unlock_ptr (mem->image[i]);
+        g_free (mem->mapped_memory);
+        GST_ERROR ("Failed to lock Mali map image: 0x%04x",
+            mali_egl_image_get_error ());
+        g_mutex_unlock (&mem->lock);
+        return;
+      }
+
+      p = ((guint8 *) mem->mapped_memory) + mem->offset[i];
+      stride = mem->stride[i];
+      h = GST_VIDEO_INFO_COMP_HEIGHT (&info, i);
+      for (j = 0; j < h; j++) {
+        memcpy (plane_memory, p, stride);
+        p += mem->stride[i];
+        plane_memory += mem->stride[i];
+      }
+
+      mali_egl_image_unmap_buffer (mem->image[i], attribs);
+      mali_egl_image_unlock_ptr (mem->image[i]);
+    }
+  }
+  g_free (mem->mapped_memory);
+
+  g_mutex_unlock (&mem->lock);
+}
+
+static gboolean
+eglimage_video_map (GstVideoMeta * meta, guint plane,
+    GstMapInfo * info, gpointer * data, gint * stride, GstMapFlags flags)
+{
+  GstMemory *gmem;
+  GstEGLImageMemory *mem;
+  GstVideoInfo vinfo;
+
+  g_return_val_if_fail (gst_buffer_n_memory (meta->buffer) == 1, FALSE);
+
+  gmem = gst_buffer_peek_memory (meta->buffer, 0);
+  g_return_val_if_fail (strcmp (gmem->allocator->mem_type,
+          GST_EGL_IMAGE_MEMORY_NAME) == 0, FALSE);
+
+  mem = GST_EGL_IMAGE_MEMORY (gmem);
+
+  g_mutex_lock (&mem->lock);
+  if (mem->format == GST_VIDEO_FORMAT_YV12) {
+    if (plane == 1)
+      plane = 2;
+    else if (plane == 2)
+      plane = 1;
+  }
+
+  if (mem->mapped_memory_refcount) {
+    /* Only multiple READ maps are allowed */
+    if ((mem->mapped_memory_flags & GST_MAP_WRITE)) {
+      g_mutex_unlock (&mem->lock);
+      return FALSE;
+    }
+  }
+
+  if (!mem->memory_refcount[plane]) {
+    EGLint attribs[] = {
+      MALI_EGL_IMAGE_PLANE, MALI_EGL_IMAGE_PLANE_Y,
+      MALI_EGL_IMAGE_ACCESS_MODE, MALI_EGL_IMAGE_ACCESS_READ_WRITE,
+      EGL_NONE
+    };
+
+    if ((flags & GST_MAP_READ) && (flags & GST_MAP_WRITE))
+      attribs[3] = MALI_EGL_IMAGE_ACCESS_READ_WRITE;
+    else if ((flags & GST_MAP_READ))
+      attribs[3] = MALI_EGL_IMAGE_ACCESS_READ_ONLY;
+    else if ((flags & GST_MAP_WRITE))
+      attribs[3] = MALI_EGL_IMAGE_ACCESS_WRITE_ONLY;
+
+    mem->memory_platform_data[plane] =
+        mali_egl_image_lock_ptr (mem->image[plane]);
+    if (!mem->memory_platform_data[plane]) {
+      GST_ERROR ("Failed to lock Mali EGL image: 0x%04x",
+          mali_egl_image_get_error ());
+      goto map_error;
+    }
+
+    mem->memory[plane] =
+        mali_egl_image_map_buffer (mem->memory_platform_data[plane], attribs);
+    if (!mem->memory[plane])
+      goto map_error;
+
+    mem->memory_flags[plane] = flags;
+  } else {
+    /* Only multiple READ maps are allowed */
+    if ((mem->memory_flags[plane] & GST_MAP_WRITE)) {
+      g_mutex_unlock (&mem->lock);
+      return FALSE;
+    }
+  }
+
+  mem->memory_refcount[plane]++;
+  gst_video_info_set_format (&vinfo, mem->format, mem->width, mem->height);
+
+  *data = mem->memory[plane];
+  *stride = mem->stride[plane];
+
+  g_mutex_unlock (&mem->lock);
+  return TRUE;
+
+map_error:
+  {
+    EGLint attribs[] = {
+      MALI_EGL_IMAGE_PLANE, MALI_EGL_IMAGE_PLANE_Y,
+      EGL_NONE
+    };
+    GST_ERROR ("Failed to map Mali EGL image: 0x%04x",
+        mali_egl_image_get_error ());
+
+    if (mem->memory_platform_data[plane]) {
+      mali_egl_image_unmap_buffer (mem->image[plane], attribs);
+      mali_egl_image_unlock_ptr (mem->image[plane]);
+    }
+    mem->memory[plane] = NULL;
+    mem->memory_platform_data[plane] = NULL;
+
+    g_mutex_unlock (&mem->lock);
+
+    return FALSE;
+  }
+}
+
+static gboolean
+eglimage_video_unmap (GstVideoMeta * meta, guint plane, GstMapInfo * info)
+{
+  GstMemory *gmem;
+  GstEGLImageMemory *mem;
+  EGLint attribs[] = {
+    MALI_EGL_IMAGE_PLANE, MALI_EGL_IMAGE_PLANE_Y,
+    EGL_NONE
+  };
+
+  g_return_val_if_fail (gst_buffer_n_memory (meta->buffer) == 1, FALSE);
+
+  gmem = gst_buffer_peek_memory (meta->buffer, 0);
+  g_return_val_if_fail (strcmp (gmem->allocator->mem_type,
+          GST_EGL_IMAGE_MEMORY_NAME) == 0, FALSE);
+  mem = GST_EGL_IMAGE_MEMORY (gmem);
+
+  g_mutex_lock (&mem->lock);
+  if (mem->format == GST_VIDEO_FORMAT_YV12) {
+    if (plane == 1)
+      plane = 2;
+    else if (plane == 2)
+      plane = 1;
+  }
+
+  if (!mem->memory_refcount[plane]) {
+    g_mutex_unlock (&mem->lock);
+    g_return_val_if_reached (FALSE);
+  }
+
+  mem->memory_refcount[plane]--;
+  if (mem->memory_refcount[plane] > 0) {
+    g_mutex_unlock (&mem->lock);
+    return TRUE;
+  }
+
+  /* Unmaps automatically */
+  if (mem->memory_platform_data[plane]) {
+    mali_egl_image_unmap_buffer (mem->image[plane], attribs);
+    mali_egl_image_unlock_ptr (mem->image[plane]);
+  }
+  mem->memory[plane] = NULL;
+  mem->memory_platform_data[plane] = NULL;
+
+  g_mutex_unlock (&mem->lock);
+
+  return TRUE;
+}
+
+gboolean
+platform_can_map_eglimage (GstMemoryMapFunction * map,
+    GstMemoryUnmapFunction * unmap, PlatformMapVideo * video_map,
+    PlatformUnmapVideo * video_unmap)
+{
+  *map = eglimage_map;
+  *unmap = eglimage_unmap;
+  *video_map = eglimage_video_map;
+  *video_unmap = eglimage_video_unmap;
+  return TRUE;
+}
+
+gboolean
+platform_has_custom_eglimage_alloc (void)
+{
+  return TRUE;
+}
+
+gboolean
+platform_alloc_eglimage (EGLDisplay display, EGLContext context, GLint format,
+    GLint type, gint width, gint height, GLuint tex_id, EGLImageKHR * image,
+    gpointer * image_platform_data)
+{
+  fbdev_pixmap pixmap;
+
+  pixmap.flags = FBDEV_PIXMAP_SUPPORTS_UMP;
+  pixmap.width = width;
+  pixmap.height = height;
+
+  switch (format) {
+    case GL_LUMINANCE:
+      g_return_val_if_fail (type == GL_UNSIGNED_BYTE, FALSE);
+      pixmap.red_size = 0;
+      pixmap.green_size = 0;
+      pixmap.blue_size = 0;
+      pixmap.alpha_size = 0;
+      pixmap.luminance_size = 8;
+      break;
+    case GL_LUMINANCE_ALPHA:
+      g_return_val_if_fail (type == GL_UNSIGNED_BYTE, FALSE);
+      pixmap.red_size = 0;
+      pixmap.green_size = 0;
+      pixmap.blue_size = 0;
+      pixmap.alpha_size = 8;
+      pixmap.luminance_size = 8;
+      break;
+    case GL_RGB:
+      if (type == GL_UNSIGNED_BYTE) {
+        pixmap.red_size = 8;
+        pixmap.green_size = 8;
+        pixmap.blue_size = 8;
+        pixmap.alpha_size = 0;
+        pixmap.luminance_size = 0;
+      } else if (type == GL_UNSIGNED_SHORT_5_6_5) {
+        pixmap.red_size = 5;
+        pixmap.green_size = 6;
+        pixmap.blue_size = 5;
+        pixmap.alpha_size = 0;
+        pixmap.luminance_size = 0;
+      } else {
+        g_return_val_if_reached (FALSE);
+      }
+      break;
+    case GL_RGBA:
+      g_return_val_if_fail (type == GL_UNSIGNED_BYTE, FALSE);
+      pixmap.red_size = 8;
+      pixmap.green_size = 8;
+      pixmap.blue_size = 8;
+      pixmap.alpha_size = 8;
+      pixmap.luminance_size = 0;
+      break;
+    default:
+      g_assert_not_reached ();
+      return FALSE;
+  }
+
+  pixmap.buffer_size =
+      pixmap.red_size + pixmap.green_size + pixmap.blue_size +
+      pixmap.alpha_size + pixmap.luminance_size;
+  pixmap.bytes_per_pixel = pixmap.buffer_size / 8;
+  pixmap.format = 0;
+
+  if (ump_open () != UMP_OK) {
+    GST_ERROR ("Failed to open UMP");
+    return FALSE;
+  }
+
+  pixmap.data =
+      ump_ref_drv_allocate (GST_ROUND_UP_4 (pixmap.width) * pixmap.height *
+      pixmap.bytes_per_pixel, UMP_REF_DRV_CONSTRAINT_PHYSICALLY_LINEAR);
+  if (pixmap.data == UMP_INVALID_MEMORY_HANDLE) {
+    GST_ERROR ("Failed to allocate pixmap data via UMP");
+    ump_close ();
+    return FALSE;
+  }
+
+  *image_platform_data = g_slice_dup (fbdev_pixmap, &pixmap);
+  *image =
+      eglCreateImageKHR (display, EGL_NO_CONTEXT, EGL_NATIVE_PIXMAP_KHR,
+      (EGLClientBuffer) * image_platform_data, NULL);
+  if (!image) {
+    GST_ERROR ("Failed to create EGLImage for pixmap");
+    ump_reference_release ((ump_handle) pixmap.data);
+    ump_close ();
+    g_slice_free (fbdev_pixmap, *image_platform_data);
+    return FALSE;
+  }
+
+  return TRUE;
+}
+
+void
+platform_free_eglimage (EGLDisplay display, EGLContext context, GLuint tex_id,
+    EGLImageKHR * image, gpointer * image_platform_data)
+{
+  fbdev_pixmap *pixmap = *image_platform_data;
+
+  eglDestroyImageKHR (display, *image);
+  ump_reference_release ((ump_handle) pixmap->data);
+  ump_close ();
+  g_slice_free (fbdev_pixmap, *image_platform_data);
+}
+
 #endif

 #if !defined(USE_EGL_X11) && !defined(USE_EGL_MALI_FB)
+#include <gst/video/gstvideopool.h>
+
 /* Dummy functions for creating a native Window */
 EGLNativeWindowType
 platform_create_native_window (gint width, gint height, gpointer * window_data)
@ -161,4 +629,33 @@ platform_destroy_native_window (EGLNativeDisplayType display,
  return TRUE;
 }

+gboolean
+platform_can_map_eglimage (GstMemoryMapFunction * map,
+    GstMemoryUnmapFunction * unmap, PlatformMapVideo * video_map,
+    PlatformUnmapVideo * video_unmap)
+{
+  return FALSE;
+}
+
+gboolean
+platform_has_custom_eglimage_alloc (void)
+{
+  return FALSE;
+}
+
+gboolean
+platform_alloc_eglimage (EGLDisplay display, EGLContext context, GLint format,
+    GLint type, gint width, gint height, GLuint tex_id, EGLImageKHR * image,
+    gpointer * image_platform_data)
+{
+  g_assert_not_reached ();
+  return FALSE;
+}
+
+void
+platform_free_eglimage (EGLDisplay display, EGLContext context, GLuint tex_id,
+    EGLImageKHR * image, gpointer * image_platform_data)
+{
+  g_assert_not_reached ();
+}
 #endif
--- a/ext/eglgles/video_platform_wrapper.h
+++ b/ext/eglgles/video_platform_wrapper.h
@ -51,6 +51,8 @@
 #define __GST_ANDROID_VIDEO_PLATFORM_WRAPPER__

 #include <gst/gst.h>
+#include <gst/video/video.h>
+#include <gst/video/gstvideometa.h>
 #include <EGL/egl.h>

 gboolean platform_wrapper_init (void);
@ -58,5 +60,44 @@ EGLNativeWindowType platform_create_native_window (gint width, gint height, gpoi
 gboolean platform_destroy_native_window (EGLNativeDisplayType display,
    EGLNativeWindowType w, gpointer * window_data);

+GstBufferPool *platform_create_buffer_pool (EGLDisplay display);
+
+#define GST_EGL_IMAGE_MEMORY_NAME "GstEGLImage"
+typedef struct
+{
+  GstMemory parent;
+  
+  GstVideoFormat format;
+  gint width, height;
+
+  GMutex lock;
+
+  /* Always in order RGB/Y, UV/U, V */
+  EGLImageKHR image[3];
+  gpointer image_platform_data[3];
+  GLuint texture[3];
+  gint stride[3];
+  gsize offset[3];
+  guint n_textures;
+
+  gpointer memory[3];
+  gpointer memory_platform_data[3];
+  gint memory_refcount[3];
+  GstMapFlags memory_flags[3];
+
+  gpointer mapped_memory;
+  gint mapped_memory_refcount;
+  GstMapFlags mapped_memory_flags;
+} GstEGLImageMemory;
+
+#define GST_EGL_IMAGE_MEMORY(m) ((GstEGLImageMemory*)(m))
+
+typedef gboolean (*PlatformMapVideo)    (GstVideoMeta *meta, guint plane, GstMapInfo *info, gpointer *data, gint * stride, GstMapFlags flags);
+typedef gboolean (*PlatformUnmapVideo)  (GstVideoMeta *meta, guint plane, GstMapInfo *info);
+
+gboolean platform_can_map_eglimage (GstMemoryMapFunction *map, GstMemoryUnmapFunction *unmap, PlatformMapVideo *video_map, PlatformUnmapVideo *video_unmap);
+gboolean platform_has_custom_eglimage_alloc (void);
+gboolean platform_alloc_eglimage (EGLDisplay display, EGLContext context, GLint format, GLint type, gint width, gint height, GLuint tex_id, EGLImageKHR *image, gpointer *image_platform_data);
+void platform_free_eglimage (EGLDisplay display, EGLContext context, GLuint tex_id, EGLImageKHR *image, gpointer *image_platform_data);

 #endif