Volter,
What pipeline did you use? What audio file type are you playing? Adecoder
can run in two modes, push or pull. In pull mode, adecoder drivers the
pipeline, and as you pointed out it doesn't implement seek. In push mode,
adecoder receives data from upstream, as long as the upstream component
supports seeking, adecoder doesn't need to do anything additional.
As an example, with mp3, this won't seek correctly, because adecoder just
pulls data from the filesrc.
filesrc location=$1 ! adecoder Codec=3 ! osssink
This will seek, (but I've found it's very slow on my dm6446):
filesrc location=$1 ! mp3parse ! adecoder ! osssink
Tyler
2008/4/8 Volter Yen <[EMAIL PROTECTED]>:
> 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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