Hi,
Sorry im new to g-streamer so appologies if my question is basic, Im
writing a plugin for a multi-standard audio decoder (dsp), im finding
that my set_caps funtion on my sink pad is not being called so i
cannot setup the hardware to the correct data type, my pad is setup as
follows:
static GstStaticPadTemplate pipe0_sink_factory = GST_STATIC_PAD_TEMPLATE(
"pipe0-sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS(
"audio/x-ac3; "
"audio/x-flac; "
"audio/mpeg, "
"mpegversion = (int) { 1, 4 }, "
"layer = (int) { 1, 3 }; "
"audio/pn-realaudio; "
"audio/x-vorbis; "
"audio/x-wma; "
));
and I register my set_caps function in my init function as per the
boilerplate code:
static void gst_axd_init(GstAxd *axd, GstAxdClass *gclass)
{
g_print("Initialising AXD plugin\n");
axd->pipe0_sinkpad = gst_pad_new_from_static_template(
&pipe0_sink_factory,
"pipe0-sink");
gst_pad_set_setcaps_function(
axd->pipe0_sinkpad,
GST_DEBUG_FUNCPTR(gst_axd_set_caps)
);
gst_pad_set_getcaps_function(
axd->pipe0_sinkpad,
GST_DEBUG_FUNCPTR(gst_pad_proxy_getcaps)
);
gst_pad_set_chain_function(axd->pipe0_sinkpad,
GST_DEBUG_FUNCPTR(gst_axd_chain));
axd->pipe0_srcpad = gst_pad_new_from_static_template(
&pipe0_src_factory,
"pipe0-src"
);
gst_pad_set_getcaps_function(
axd->pipe0_srcpad,
GST_DEBUG_FUNCPTR(gst_pad_proxy_getcaps)
);
gst_element_add_pad(GST_ELEMENT(axd), axd->pipe0_sinkpad);
gst_element_add_pad(GST_ELEMENT(axd), axd->pipe0_srcpad);
axd->silent = FALSE;
but my 'gst_axd_set_caps' function does appear to get called and I end
up at pre-roll without setting up the hardware
any help appreciated ???
I invoked my plugin with 'gst-launch filesrc location=test.mp3 ! axd ! alsasink
Cheers,
Neil
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