GstAllocator *
gst_vaapi_dmabuf_allocator_new (GstVaapiDisplay * display,
    const GstVideoInfo * vip, guint flags)
{
  GstAllocator *allocator = NULL;
  GstVaapiSurface *surface = NULL;
  GstVaapiImage *image = NULL;
  GstVideoInfo alloc_info;

  g_return_val_if_fail (display != NULL, NULL);
  g_return_val_if_fail (vip != NULL, NULL);

  do {
    surface = gst_vaapi_surface_new_full (display, vip, flags);
    if (!surface)
      break;

    image = gst_vaapi_surface_derive_image (surface);
    if (!image || !gst_vaapi_image_map (image))
      break;

    gst_video_info_set_format (&alloc_info, GST_VIDEO_INFO_FORMAT (vip),
        GST_VIDEO_INFO_WIDTH (vip), GST_VIDEO_INFO_HEIGHT (vip));
    gst_video_info_update_from_image (&alloc_info, image);
    gst_vaapi_image_unmap (image);

    allocator = gst_dmabuf_allocator_new ();
    if (!allocator)
      break;
    gst_allocator_set_vaapi_video_info (allocator, &alloc_info, flags);
  } while (0);

  gst_vaapi_object_replace (&image, NULL);
  gst_vaapi_object_replace (&surface, NULL);
  return allocator;
}
Пример #2
0
static gboolean
gst_v4l2_buffer_pool_set_config (GstBufferPool * bpool, GstStructure * config)
{
  GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
  GstV4l2Object *obj = pool->obj;
  GstCaps *caps;
  guint size, min_buffers, max_buffers;
  GstAllocator *allocator;
  GstAllocationParams params;
  gboolean can_allocate = FALSE;
  gboolean updated = FALSE;
  gboolean ret;

  pool->add_videometa =
      gst_buffer_pool_config_has_option (config,
      GST_BUFFER_POOL_OPTION_VIDEO_META);

  /* parse the config and keep around */
  if (!gst_buffer_pool_config_get_params (config, &caps, &size, &min_buffers,
          &max_buffers))
    goto wrong_config;

  if (!gst_buffer_pool_config_get_allocator (config, &allocator, &params))
    goto wrong_config;

  GST_DEBUG_OBJECT (pool, "config %" GST_PTR_FORMAT, config);

  if (pool->allocator)
    gst_object_unref (pool->allocator);
  pool->allocator = NULL;

  switch (obj->mode) {
    case GST_V4L2_IO_DMABUF:
      pool->allocator = gst_dmabuf_allocator_new ();
      can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, MMAP);
      break;
    case GST_V4L2_IO_MMAP:
      can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, MMAP);
      break;
    case GST_V4L2_IO_USERPTR:
      can_allocate =
          GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, USERPTR);
      break;
    case GST_V4L2_IO_DMABUF_IMPORT:
      can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, DMABUF);
      break;
    case GST_V4L2_IO_RW:
      pool->allocator = g_object_ref (allocator);
      pool->params = params;
      /* No need to change the configuration */
      goto done;
      break;
    default:
      g_assert_not_reached ();
      break;
  }

  if (min_buffers < GST_V4L2_MIN_BUFFERS) {
    updated = TRUE;
    min_buffers = GST_V4L2_MIN_BUFFERS;
    GST_INFO_OBJECT (pool, "increasing minimum buffers to %u", min_buffers);
  }

  if (max_buffers > VIDEO_MAX_FRAME || max_buffers == 0) {
    updated = TRUE;
    max_buffers = VIDEO_MAX_FRAME;
    GST_INFO_OBJECT (pool, "reducing maximum buffers to %u", max_buffers);
  }

  if (min_buffers > max_buffers) {
    updated = TRUE;
    min_buffers = max_buffers;
    GST_INFO_OBJECT (pool, "reducing minimum buffers to %u", min_buffers);
  } else if (min_buffers != max_buffers) {
    if (!can_allocate) {
      updated = TRUE;
      max_buffers = min_buffers;
      GST_INFO_OBJECT (pool, "can't allocate, setting maximum to minimum");
    }
  }

  if (!pool->add_videometa && obj->need_video_meta) {
    GST_INFO_OBJECT (pool, "adding needed video meta");
    updated = TRUE;
    gst_buffer_pool_config_add_option (config,
        GST_BUFFER_POOL_OPTION_VIDEO_META);
  }

  if (updated)
    gst_buffer_pool_config_set_params (config, caps, size, min_buffers,
        max_buffers);

  /* keep a GstVideoInfo with defaults for the when we need to copy */
  gst_video_info_from_caps (&pool->caps_info, caps);

done:
  ret = GST_BUFFER_POOL_CLASS (parent_class)->set_config (bpool, config);

  /* If anything was changed documentation recommand to return FALSE */
  return !updated && ret;

  /* ERRORS */
wrong_config:
  {
    GST_ERROR_OBJECT (pool, "invalid config %" GST_PTR_FORMAT, config);
    return FALSE;
  }
}