C++ (Cpp) gst_gl_mixer_propose_allocation示例

示例#1

文件： gstglmixer.c 项目： asdlei00/gst-plugins-bad

static gboolean
gst_gl_mixer_sink_query (GstAggregator * agg, GstAggregatorPad * bpad,
    GstQuery * query)
{
  gboolean ret = FALSE;
  GstGLMixer *mix = GST_GL_MIXER (agg);

  GST_TRACE ("QUERY %" GST_PTR_FORMAT, query);

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_ALLOCATION:
    {
      GstQuery *decide_query = NULL;
      gboolean negotiated;

      GST_OBJECT_LOCK (mix);
      if (G_UNLIKELY (!(negotiated = mix->priv->negotiated))) {
        GST_DEBUG_OBJECT (mix,
            "not negotiated yet, can't answer ALLOCATION query");
        GST_OBJECT_UNLOCK (mix);
        return FALSE;
      }
      if ((decide_query = mix->priv->query))
        gst_query_ref (decide_query);
      GST_OBJECT_UNLOCK (mix);

      GST_DEBUG_OBJECT (mix,
          "calling propose allocation with query %" GST_PTR_FORMAT,
          decide_query);

      /* pass the query to the propose_allocation vmethod if any */
      ret = gst_gl_mixer_propose_allocation (mix, decide_query, query);

      if (decide_query)
        gst_query_unref (decide_query);

      GST_DEBUG_OBJECT (mix, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
      break;
    }
    case GST_QUERY_CONTEXT:
    {
      ret = gst_gl_handle_context_query ((GstElement *) mix, query,
          &mix->display);
      break;
    }
    default:
      ret = GST_AGGREGATOR_CLASS (parent_class)->sink_query (agg, bpad, query);
      break;
  }

  return ret;
}

示例#2

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

static gboolean
gst_gl_mixer_sink_query (GstAggregator * agg, GstAggregatorPad * bpad,
                         GstQuery * query)
{
    gboolean ret = FALSE;
    GstGLMixer *mix = GST_GL_MIXER (agg);
    GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);

    GST_TRACE ("QUERY %" GST_PTR_FORMAT, query);

    switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_CAPS:
    {
        GstCaps *filter, *caps;

        gst_query_parse_caps (query, &filter);
        caps = gst_gl_mixer_pad_sink_getcaps (GST_PAD (bpad), mix, filter);
        gst_query_set_caps_result (query, caps);
        gst_caps_unref (caps);
        ret = TRUE;
        break;
    }
    case GST_QUERY_ACCEPT_CAPS:
    {
        GstCaps *caps;

        gst_query_parse_accept_caps (query, &caps);
        ret = gst_gl_mixer_pad_sink_acceptcaps (GST_PAD (bpad), mix, caps);
        gst_query_set_accept_caps_result (query, ret);
        ret = TRUE;
        break;
    }
    case GST_QUERY_ALLOCATION:
    {
        GstQuery *decide_query = NULL;

        GST_OBJECT_LOCK (mix);
        if (G_UNLIKELY (!mix->priv->negotiated)) {
            GST_DEBUG_OBJECT (mix,
                              "not negotiated yet, can't answer ALLOCATION query");
            GST_OBJECT_UNLOCK (mix);
            return FALSE;
        }
        if ((decide_query = mix->priv->query))
            gst_query_ref (decide_query);
        GST_OBJECT_UNLOCK (mix);

        GST_DEBUG_OBJECT (mix,
                          "calling propose allocation with query %" GST_PTR_FORMAT,
                          decide_query);

        /* pass the query to the propose_allocation vmethod if any */
        ret = gst_gl_mixer_propose_allocation (mix, decide_query, query);

        if (decide_query)
            gst_query_unref (decide_query);

        GST_DEBUG_OBJECT (mix, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
        break;
    }
    case GST_QUERY_CONTEXT:
    {
        ret = gst_gl_handle_context_query ((GstElement *) mix, query,
                                           &mix->display, &mix->other_context);
        if (mix->display)
            gst_gl_display_filter_gl_api (mix->display,
                                          mix_class->supported_gl_api);
        break;
    }
    default:
        ret = GST_AGGREGATOR_CLASS (parent_class)->sink_query (agg, bpad, query);
        break;
    }

    return ret;
}