[gst-devel] seek help about fast forward/backward & plugin

[Volter Yen]

Hi sudarshan ,
    It have simply processed the state changes. namely when  the change is ST_STATE_CHANGE_READY_TO_NULL, reset the decode and clear the buffers,
and I am tring to change to pipeline's scheduling mode according to Tyler's suggestion. anyhow,thank you a lot!
   Volter
 

在2008-04-09，"sudarshan bisht" <bisht.sudarshan at gmail.com> 写道：

Hi Volter,
              Its better to implement all the event handling in _change_state function . 


2008/4/8 Volter Yen <volter619 at 163.com>:

Hi all,
    Recently,I used the adecode to try to implement an audio player with  fast forward/backwad fuctions, but It gave no response to my seeking action in my application, and the probelm maybe be caused by the event process in the decode element,it just forward the event to other elements in the pipe. 
 and  the related codes are as follow: 
 
static gboolean gst_adecoder_src_event(GstPad * pad, GstEvent * event)
{
    gboolean res;
    GstADecoder *adecoder;
    adecoder = GST_ADECODER(GST_PAD_PARENT(pad));
    if (adecoder->codec_handle == NULL)
    goto no_decoder;
    res = gst_pad_push_event(adecoder->sinkpad, event);
    return res;
    no_decoder:
    {
        GST_DEBUG_OBJECT(adecoder, "no decoder, cannot handle event");
        gst_event_unref(event);
        return FALSE;
    }
}
 
 
static gboolean gst_adecoder_sink_event(GstPad * pad, GstEvent * event)
{
    GstADecoder *adecoder = GST_ADECODER(GST_PAD_PARENT(pad));
    gboolean ret = TRUE;
    #ifdef DEBUG
    printf("Got %s event on sink pad\n", GST_EVENT_TYPE_NAME(event));
    #endif
    switch (GST_EVENT_TYPE(event))
    {
  case GST_EVENT_NEWSEGMENT:
  ret = gst_pad_event_default(pad, event);
  break;
     case GST_EVENT_FLUSH_START:
        ret = gst_pad_event_default(pad, event);
        break;
     case GST_EVENT_FLUSH_STOP:
        ret = gst_pad_event_default(pad, event);
        break;
     case GST_EVENT_EOS:
      gst_adecoder_decode_remaining(adecoder);
      ret = gst_pad_event_default(pad, event);
        break;
     default:
        ret = gst_pad_event_default(pad, event);
        break;
    }
    return ret;
}
 
      Is there any problem? Any suggestion? Thank you!
 
      Volter



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-- 
Regards,

Sudarshan Bisht
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