[gst-devel] audioresample
Jesu Anuroop Suresh
jesuas at gmail.com
Thu Jan 13 05:21:12 CET 2011
Hi Cai,
Thanks for you response, I Will try out your suggestion of using the
filtered link.
Sorry there was some typoerror in my code what I shared.
I did initialized the 'resmux' as capasity filter and used the conv not
conv1.
The cocde works for me for mp3 playback in its original settings.
resample = gst_element_factory_make ("audioresample",
"audio-resample");
conv = gst_element_factory_make ("audioconvert", "converter1");
resmux = gst_element_factory_make ("capsfilter", "filter");
caps = gst_caps_new_simple ("audio/x-raw-int",
"width", G_TYPE_INT, 16,
"depth", G_TYPE_INT, 16,
"rate", G_TYPE_INT, 22050,
"channels",G_TYPE_INT, 2, NULL
);
if (!musicPlayer.playPipeline || !source || !sink ||
!resample || !resmux || !caps || !conv)
{
g_print ("NO MEM Exiting.\n");
return 1;
}
/* we set the input filename to the source element */
g_object_set (G_OBJECT (source), "location", filePath, NULL);
demuxer = gst_element_factory_make ("id3demux", "id3-demuxer");
decoder = gst_element_factory_make ("mad", "mp3-decoder");
if (!demuxer || !decoder || !conv)
{
g_print ("NO MEM Exiting.\n");
return 1;
}
With Warm Regards
Jesu Anuroop Suresh
"Any intelligent fool can make things bigger, more complex, and more
violent. It takes a touch of genius -- and a lot of courage -- to move in
the opposite direction."
"Anyone who has never made a mistake has never tried anything new."
On Thu, Jan 13, 2011 at 7:16 AM, Cai Yuanqing [via GStreamer-devel] <
ml-node+3215098-821959213-203210 at n4.nabble.com<ml-node%2B3215098-821959213-203210 at n4.nabble.com>
> wrote:
> Hi Suresh:
> Your application have a little problem. :-)
>
>
> On 01/12/2011 08:41 PM, Jesu Anuroop Suresh wrote:
>
> > Hi Sean,
> >
> > Yes, what I was trying is to resample the decoded mp3 data to the
> > fixed (22KHZ S16LE) formate,
> >
> > no matter what is the input rate using a C application.
> >
> > Thanks for your response.
> >
> > Here is the piece of the code for the same but it does not work with
> > audioresample with the caps filter 'resmux'. This code does work
> > without the caps filter 'resmux'.
> >
> > GstElement *source, *demuxer, *decoder, *conv, *sink,
> > *resample, *resmux;
> > GstCaps *caps;
> >
> > gst_init(NULL, NULL);
> >
> > /* Create gstreamer elements */
> > musicPlayer.playPipeline = gst_pipeline_new ("audio-player");
> > source = gst_element_factory_make ("filesrc", "file-source");
> > sink = gst_element_factory_make ("alsasink", "audio-output");
>
> > resample = gst_element_factory_make ("audioresample",
> > "audio-resample");
> > conv = gst_element_factory_make ("audioconvert",
> > "converter1");
> >
> > caps = gst_caps_new_simple ("audio/x-raw-int",
> > "width", G_TYPE_INT, 16,
> > "depth", G_TYPE_INT, 16,
> > "rate", G_TYPE_INT, 22050,
> > "channels",G_TYPE_INT, 2, NULL
> > );
> >
> > if (!musicPlayer.playPipeline || !source || !sink ||
> > !resample || !resmux || !caps || !conv)
> > {
> > g_print ("NO MEM Exiting.\n");
> > return 1;
> > }
> resmux is not initialized yet,here maybe some random value,you'd better
> remove it from check list.
>
> >
> > /* we set the input filename to the source element */
> > g_object_set (G_OBJECT (source), "location", filePath, NULL);
> >
> > demuxer = gst_element_factory_make ("id3demux", "id3-demuxer");
> > decoder = gst_element_factory_make ("mad", "mp3-decoder");
> >
> > if (!demuxer || !decoder || !conv1)
> conv1 ? dose it should be conv?
>
> > {
> > g_print ("NO MEM Exiting.\n");
> > return 1;
> > }
> >
> > g_object_set (G_OBJECT (resmux), "caps", caps, NULL);
> > gst_caps_unref (caps);
> >
> as I said before,resmux haven't initialized ,that's not quite right.
> and I suggest you to remove these two lines.
>
> > /* file-source -> demuxer -> decoder -> alsa-output */
> > gst_bin_add_many (GST_BIN (musicPlayer.playPipeline),
> > source, demuxer, decoder, conv, resample,
> > resmux,sink, NULL);
> >
> > gst_element_link (source, demuxer);
> > gst_element_link_many (decoder, conv, resample,resmux,sink,
> NULL);
> You can use gst_element_link_filtered to link resample and sink with
> caps instead of this way.
> something like:
> gst_element_link (source, demuxer);
> gst_element_link_many (decoder, conv, resample, NULL);
> if ( !gst_element_link_filtered(resample,sink,caps) ){
> g_printerr("Failed to link elements resample and alsa-sink");
> }
>
>
> > g_signal_connect (demuxer, "pad-added", G_CALLBACK
> > (on_pad_added), decoder);
> >
> > GstBus *bus =
> > gst_pipeline_get_bus(GST_PIPELINE(musicPlayer.playPipeline));
> > gst_bus_add_watch(bus, bus_call, NULL);
> > gst_object_unref(bus);
> >
> > gst_element_set_state(GST_ELEMENT(musicPlayer.playPipeline),
> > GST_STATE_PLAYING);
> >
> > musicPlayer.playLoop = g_main_loop_new(NULL, FALSE);
> >
> > g_main_loop_run(musicPlayer.playLoop);
> >
> > gst_element_set_state(GST_ELEMENT(musicPlayer.playPipeline),
> > GST_STATE_NULL);
> > gst_object_unref(GST_OBJECT(musicPlayer.playPipeline));
> >
> >
> >
> >
> > With Warm Regards
> > Jesu Anuroop Suresh
> >
> > "Any intelligent fool can make things bigger, more complex, and more
> > violent. It takes a touch of genius -- and a lot of courage -- to move
> > in the opposite direction."
> > "Anyone who has never made a mistake has never tried anything new."
> >
> >
> I attached my modified source code ,you can try it.
> Hope it helps.
>
> Thanks.
>
>
> --
> B.R
>
> Cai Yuanqing
>
>
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