C++ (Cpp) GST_VIDEO_INFO_COMP_OFFSET Examples

Example #1

File: gstintervideosrc.c Project: ylatuya/gst-plugins-bad

static GstFlowReturn
gst_inter_video_src_create (GstBaseSrc * src, guint64 offset, guint size,
    GstBuffer ** buf)
{
  GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
  GstBuffer *buffer;

  GST_DEBUG_OBJECT (intervideosrc, "create");

  buffer = NULL;

  g_mutex_lock (intervideosrc->surface->mutex);
  if (intervideosrc->surface->video_buffer) {
    buffer = gst_buffer_ref (intervideosrc->surface->video_buffer);
    intervideosrc->surface->video_buffer_count++;
    if (intervideosrc->surface->video_buffer_count >= 30) {
      gst_buffer_unref (intervideosrc->surface->video_buffer);
      intervideosrc->surface->video_buffer = NULL;
    }
  }
  g_mutex_unlock (intervideosrc->surface->mutex);

  if (buffer == NULL) {
    GstMapInfo map;

    buffer =
        gst_buffer_new_and_alloc (GST_VIDEO_INFO_SIZE (&intervideosrc->info));

    gst_buffer_map (buffer, &map, GST_MAP_WRITE);
    memset (map.data, 16, GST_VIDEO_INFO_COMP_STRIDE (&intervideosrc->info, 0) *
        GST_VIDEO_INFO_COMP_HEIGHT (&intervideosrc->info, 0));

    memset (map.data + GST_VIDEO_INFO_COMP_OFFSET (&intervideosrc->info, 1),
        128,
        2 * GST_VIDEO_INFO_COMP_STRIDE (&intervideosrc->info, 1) *
        GST_VIDEO_INFO_COMP_HEIGHT (&intervideosrc->info, 1));
    gst_buffer_unmap (buffer, &map);
  }

  buffer = gst_buffer_make_writable (buffer);

  GST_BUFFER_TIMESTAMP (buffer) =
      gst_util_uint64_scale_int (GST_SECOND * intervideosrc->n_frames,
      GST_VIDEO_INFO_FPS_D (&intervideosrc->info),
      GST_VIDEO_INFO_FPS_N (&intervideosrc->info));
  GST_DEBUG_OBJECT (intervideosrc, "create ts %" GST_TIME_FORMAT,
      GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
  GST_BUFFER_DURATION (buffer) =
      gst_util_uint64_scale_int (GST_SECOND * (intervideosrc->n_frames + 1),
      GST_VIDEO_INFO_FPS_D (&intervideosrc->info),
      GST_VIDEO_INFO_FPS_N (&intervideosrc->info)) -
      GST_BUFFER_TIMESTAMP (buffer);
  GST_BUFFER_OFFSET (buffer) = intervideosrc->n_frames;
  GST_BUFFER_OFFSET_END (buffer) = -1;
  GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DISCONT);
  if (intervideosrc->n_frames == 0) {
    GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
  }
  intervideosrc->n_frames++;

  *buf = buffer;

  return GST_FLOW_OK;
}

Example #2

File: gstdeinterlacemethod.c Project: PeterXu/gst-mobile

static void
gst_deinterlace_method_setup_impl (GstDeinterlaceMethod * self,
    GstVideoInfo * vinfo)
{
  gint i;
  GstDeinterlaceMethodClass *klass = GST_DEINTERLACE_METHOD_GET_CLASS (self);

  self->vinfo = vinfo;

  self->deinterlace_frame = NULL;

  if (GST_VIDEO_INFO_FORMAT (self->vinfo) == GST_VIDEO_FORMAT_UNKNOWN)
    return;

  for (i = 0; i < 4; i++) {
    self->width[i] = GST_VIDEO_INFO_COMP_WIDTH (vinfo, i);
    self->height[i] = GST_VIDEO_INFO_COMP_HEIGHT (vinfo, i);
    self->offset[i] = GST_VIDEO_INFO_COMP_OFFSET (vinfo, i);
    self->row_stride[i] = GST_VIDEO_INFO_COMP_STRIDE (vinfo, i);
    self->pixel_stride[i] = GST_VIDEO_INFO_COMP_PSTRIDE (vinfo, i);
  }

  switch (GST_VIDEO_INFO_FORMAT (self->vinfo)) {
    case GST_VIDEO_FORMAT_YUY2:
      self->deinterlace_frame = klass->deinterlace_frame_yuy2;
      break;
    case GST_VIDEO_FORMAT_YVYU:
      self->deinterlace_frame = klass->deinterlace_frame_yvyu;
      break;
    case GST_VIDEO_FORMAT_UYVY:
      self->deinterlace_frame = klass->deinterlace_frame_uyvy;
      break;
    case GST_VIDEO_FORMAT_I420:
      self->deinterlace_frame = klass->deinterlace_frame_i420;
      break;
    case GST_VIDEO_FORMAT_YV12:
      self->deinterlace_frame = klass->deinterlace_frame_yv12;
      break;
    case GST_VIDEO_FORMAT_Y444:
      self->deinterlace_frame = klass->deinterlace_frame_y444;
      break;
    case GST_VIDEO_FORMAT_Y42B:
      self->deinterlace_frame = klass->deinterlace_frame_y42b;
      break;
    case GST_VIDEO_FORMAT_Y41B:
      self->deinterlace_frame = klass->deinterlace_frame_y41b;
      break;
    case GST_VIDEO_FORMAT_AYUV:
      self->deinterlace_frame = klass->deinterlace_frame_ayuv;
      break;
    case GST_VIDEO_FORMAT_NV12:
      self->deinterlace_frame = klass->deinterlace_frame_nv12;
      break;
    case GST_VIDEO_FORMAT_NV21:
      self->deinterlace_frame = klass->deinterlace_frame_nv21;
      break;
    case GST_VIDEO_FORMAT_ARGB:
    case GST_VIDEO_FORMAT_xRGB:
      self->deinterlace_frame = klass->deinterlace_frame_argb;
      break;
    case GST_VIDEO_FORMAT_ABGR:
    case GST_VIDEO_FORMAT_xBGR:
      self->deinterlace_frame = klass->deinterlace_frame_abgr;
      break;
    case GST_VIDEO_FORMAT_RGBA:
    case GST_VIDEO_FORMAT_RGBx:
      self->deinterlace_frame = klass->deinterlace_frame_rgba;
      break;
    case GST_VIDEO_FORMAT_BGRA:
    case GST_VIDEO_FORMAT_BGRx:
      self->deinterlace_frame = klass->deinterlace_frame_bgra;
      break;
    case GST_VIDEO_FORMAT_RGB:
      self->deinterlace_frame = klass->deinterlace_frame_rgb;
      break;
    case GST_VIDEO_FORMAT_BGR:
      self->deinterlace_frame = klass->deinterlace_frame_bgr;
      break;
    default:
      self->deinterlace_frame = NULL;
      break;
  }
}