C++ (Cpp) g_omx_port_recv示例

示例#1

文件： gstomx_base_filter2.c 项目： andreimironenko/gst-openmax

static void
output_loop (gpointer data)
{
    GstPad *pad;
    GOmxCore *gomx;
    GOmxPort *out_port;
    GstOmxBaseFilter2 *self;
    GstFlowReturn ret = GST_FLOW_OK;
    GstOmxBaseFilter2Class *bclass;

    pad = data;
    self = GST_OMX_BASE_FILTER2 (gst_pad_get_parent (pad));
    gomx = self->gomx;

    bclass = GST_OMX_BASE_FILTER2_GET_CLASS (self);

    GST_LOG_OBJECT (self, "begin");

    if (!self->ready)
    {
        g_error ("not ready");
        return;
    }

    out_port = (GOmxPort *)gst_pad_get_element_private(pad);

    if (G_LIKELY (out_port->enabled))
    {
        gpointer obj = g_omx_port_recv (out_port);

        if (G_UNLIKELY (!obj))
        {
            GST_WARNING_OBJECT (self, "null buffer: leaving");
            ret = GST_FLOW_WRONG_STATE;
            goto leave;
        }

        if (G_LIKELY (GST_IS_BUFFER (obj)))
        {
            if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (obj, GST_BUFFER_FLAG_IN_CAPS)))
            {
                GstCaps *caps = NULL;
                GstStructure *structure;
                GValue value = { 0 };

                caps = gst_pad_get_negotiated_caps (pad);
                caps = gst_caps_make_writable (caps);
                structure = gst_caps_get_structure (caps, 0);

                g_value_init (&value, GST_TYPE_BUFFER);
                gst_value_set_buffer (&value, obj);
                gst_buffer_unref (obj);
                gst_structure_set_value (structure, "codec_data", &value);
                g_value_unset (&value);

                gst_pad_set_caps (pad, caps);
            }
            else
            {
                GstBuffer *buf = GST_BUFFER (obj);
                ret = bclass->push_buffer (self, buf);
                GST_DEBUG_OBJECT (self, "ret=%s", gst_flow_get_name (ret));
				// HACK!! Dont care if one of the output pads are not connected
                ret = GST_FLOW_OK;
            }
        }
        else if (GST_IS_EVENT (obj))
        {
            GST_DEBUG_OBJECT (self, "got eos");
            gst_pad_push_event (pad, obj);
            ret = GST_FLOW_UNEXPECTED;
            goto leave;
        }

    }

leave:

    self->last_pad_push_return = ret;

    if (gomx->omx_error != OMX_ErrorNone)
    {
        GST_DEBUG_OBJECT (self, "omx_error=%s", g_omx_error_to_str (gomx->omx_error));
        ret = GST_FLOW_ERROR;
    }

    if (ret != GST_FLOW_OK)
    {
        GST_INFO_OBJECT (self, "pause task, reason:  %s",
                         gst_flow_get_name (ret));
        gst_pad_pause_task (pad);
    }

    GST_LOG_OBJECT (self, "end");

    gst_object_unref (self);
}

示例#2

文件： gstomx_base_src.c 项目： prashantn/dm816x-gstreamer

/* protected helper method which can be used by derived classes:
 */
GstFlowReturn
gst_omx_base_src_create_from_port (GstOmxBaseSrc *self,
                                   GOmxPort *out_port,
                                   GstBuffer **ret_buf)
{
    GOmxCore *gomx;
    GstFlowReturn ret = GST_FLOW_OK;

    gomx = self->gomx;

    GST_LOG_OBJECT (self, "begin");

    if (out_port->enabled)
    {
        if (G_UNLIKELY (gomx->omx_state == OMX_StateIdle))
        {
            GST_INFO_OBJECT (self, "omx: play");
            g_omx_core_start (gomx);
        }

        if (G_UNLIKELY (gomx->omx_state != OMX_StateExecuting))
        {
            GST_ERROR_OBJECT (self, "Whoa! very wrong");
            ret = GST_FLOW_ERROR;
            goto beach;
        }

        while (out_port->enabled)
        {
            gpointer obj = g_omx_port_recv (out_port);

            if (G_UNLIKELY (!obj))
            {
                ret = GST_FLOW_ERROR;
                break;
            }

            if (G_LIKELY (GST_IS_BUFFER (obj)))
            {
                GstBuffer *buf = GST_BUFFER (obj);
                if (G_LIKELY (GST_BUFFER_SIZE (buf) > 0))
                {
                    PRINT_BUFFER (self, buf);
                    *ret_buf = buf;
                    break;
                }
            }
            else if (GST_IS_EVENT (obj))
            {
                GST_INFO_OBJECT (self, "got eos");
                g_omx_core_set_done (gomx);
                break;
            }
        }
    }

    if (!out_port->enabled)
    {
        GST_WARNING_OBJECT (self, "done");
        ret = GST_FLOW_UNEXPECTED;
    }

beach:

    GST_LOG_OBJECT (self, "end");

    return ret;
}