C++ (Cpp) gst_video_info_convertの例

コード例 #1

ファイル: gstvideotestsrc.c プロジェクト: rawoul/gst-plugins-base

static gboolean
gst_video_test_src_query (GstBaseSrc * bsrc, GstQuery * query)
{
  gboolean res;
  GstVideoTestSrc *src;

  src = GST_VIDEO_TEST_SRC (bsrc);

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_CONVERT:
    {
      GstFormat src_fmt, dest_fmt;
      gint64 src_val, dest_val;

      gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
      res =
          gst_video_info_convert (&src->info, src_fmt, src_val, dest_fmt,
          &dest_val);
      gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
      break;
    }
    default:
      res = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
      break;
  }
  return res;
}

コード例 #2

ファイル: gstgltestsrc.c プロジェクト: CogentEmbedded/gst-plugins-bad

static gboolean
gst_gl_test_src_query (GstBaseSrc * bsrc, GstQuery * query)
{
  gboolean res = FALSE;
  GstGLTestSrc *src;

  src = GST_GL_TEST_SRC (bsrc);

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_CONTEXT:
    {
      const gchar *context_type;
      GstContext *context, *old_context;

      res = gst_gl_handle_context_query ((GstElement *) src, query,
          &src->display, &src->other_context);
      if (src->display)
        gst_gl_display_filter_gl_api (src->display, SUPPORTED_GL_APIS);

      gst_query_parse_context_type (query, &context_type);

      if (g_strcmp0 (context_type, "gst.gl.local_context") == 0) {
        GstStructure *s;

        gst_query_parse_context (query, &old_context);

        if (old_context)
          context = gst_context_copy (old_context);
        else
          context = gst_context_new ("gst.gl.local_context", FALSE);

        s = gst_context_writable_structure (context);
        gst_structure_set (s, "context", GST_TYPE_GL_CONTEXT, src->context,
            NULL);
        gst_query_set_context (query, context);
        gst_context_unref (context);

        res = src->context != NULL;
      }
      GST_LOG_OBJECT (src, "context query of type %s %i", context_type, res);

      if (res)
        return res;

      break;
    }
    case GST_QUERY_CONVERT:
    {
      GstFormat src_fmt, dest_fmt;
      gint64 src_val, dest_val;

      gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
      res =
          gst_video_info_convert (&src->out_info, src_fmt, src_val, dest_fmt,
          &dest_val);
      gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);

      return res;
    }
    default:
      break;
  }

  return GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
}