C++ (Cpp) GST_GL_BUFFER_POOL示例

示例#1

文件： gstglbufferpool.c 项目： ego5710/gst-plugins-bad

static GstFlowReturn
gst_gl_buffer_pool_acquire_buffer (GstBufferPool * bpool,
    GstBuffer ** buffer, GstBufferPoolAcquireParams * params)
{
  GstFlowReturn ret = GST_FLOW_OK;
  GstGLBufferPool *glpool = NULL;

  ret =
      GST_BUFFER_POOL_CLASS
      (gst_gl_buffer_pool_parent_class)->acquire_buffer (bpool, buffer, params);
  if (ret != GST_FLOW_OK || !*buffer)
    return ret;

  glpool = GST_GL_BUFFER_POOL (bpool);

  /* XXX: Don't return the memory we just rendered, glEGLImageTargetTexture2DOES()
   * keeps the EGLImage unmappable until the next one is uploaded
   */
  if (glpool->priv->want_eglimage && *buffer
      && *buffer == glpool->priv->last_buffer) {
    GstBuffer *oldbuf = *buffer;

    ret =
        GST_BUFFER_POOL_CLASS
        (gst_gl_buffer_pool_parent_class)->acquire_buffer (bpool,
        buffer, params);
    gst_object_replace ((GstObject **) & oldbuf->pool, (GstObject *) glpool);
    gst_buffer_unref (oldbuf);
  }

  return ret;
}

示例#2

文件： gsteglimagememory.c 项目： sukersuker/gst-plugins-bad

static gboolean
gst_eglimage_to_gl_texture_upload_meta (GstVideoGLTextureUploadMeta *
    meta, guint texture_id[4])
{
  gint i = 0;
  gint n = 0;

  g_return_val_if_fail (meta != NULL, FALSE);
  g_return_val_if_fail (texture_id != NULL, FALSE);

  GST_DEBUG ("Uploading for meta with textures %i,%i,%i,%i", texture_id[0],
      texture_id[1], texture_id[2], texture_id[3]);

  n = gst_buffer_n_memory (meta->buffer);

  for (i = 0; i < n; i++) {
    GstMemory *mem = gst_buffer_peek_memory (meta->buffer, i);
    const GstGLFuncs *gl = NULL;

    if (!gst_is_egl_image_memory (mem)) {
      GST_WARNING ("memory %p does not hold an EGLImage", mem);
      return FALSE;
    }

    gl = GST_GL_CONTEXT (GST_EGL_IMAGE_MEMORY (mem)->context)->gl_vtable;

    gl->ActiveTexture (GL_TEXTURE0 + i);
    gl->BindTexture (GL_TEXTURE_2D, texture_id[i]);
    gl->EGLImageTargetTexture2D (GL_TEXTURE_2D,
        gst_egl_image_memory_get_image (mem));
  }

  if (GST_IS_GL_BUFFER_POOL (meta->buffer->pool))
    gst_gl_buffer_pool_replace_last_buffer (GST_GL_BUFFER_POOL (meta->
            buffer->pool), meta->buffer);


  return TRUE;
}