Hi ,
i want to implement the below pipeline using gstreamer API in c.
/* Audio has to play repeatedly */
gst-launch-0.10 interleave name=i ! alsasink filesrc
location=/home/saravanan/Music/1.wav ! decodebin ! audioconvert ! i.sink1
filesrc location=/home/saravanan/Music/s.wav ! decodebin ! audioconvert !
i.sink0
For this i have done the coding, but it is not giving error as well as not
playing also. Please guide me to solve the below code issue.
#include <gst/gst.h>
gboolean bus_callback(GstBus *bus, GstMessage *msg, gpointer data)
{
GstElement *play = GST_ELEMENT(data);
switch (GST_MESSAGE_TYPE(msg))
{
case GST_MESSAGE_EOS:
/* restart playback if at end */
if (!gst_element_seek(play,
1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
GST_SEEK_TYPE_SET, 2000000000, //2 seconds (in nanoseconds)
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE)) {
g_print("Seek failed!\n");
}
break;
default:
break;
}
return TRUE;
}
/* gst-launch-0.10 interleave name=i ! alsasink filesrc
location=/home/saravanan/Music/1.wav ! decodebin ! audioconvert !
audio/x-raw-int,channels=1 ! i.sink1 filesrc
location=/home/saravanan/Music/s.wav ! decodebin ! audioconvert !
audio/x-raw-int,channels=1 ! i.sink0 */
gint
main (gint argc,
gchar *argv[])
{
GMainLoop *loop;
GstElement *pipeline,
*filesrc_ch_1, *filesrc_ch_2,
*audioconvert_ch_1, *audioconvert_ch_2,
*decodebin_ch_1, *decodebin_ch_2,
*interleave, *alsasink;
GstPad *pad_ch_1, *pad_ch_2;
GstBus *bus;
gchar *name1, *name2;
/* init GStreamer */
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
/* make sure we have a URI */
if (argc != 3) {
g_print ("Usage: %s <URI>\n", argv[0]);
return -1;
}
pipeline = gst_pipeline_new ("pipeline0");
g_signal_connect (pipeline, "deep_notify",
G_CALLBACK(gst_object_default_deep_notify), NULL);
alsasink = gst_element_factory_make("alsasink", "alsasink");
g_assert (alsasink);
/* channel 1*/
filesrc_ch_1 = gst_element_factory_make ("filesrc", "filesrcchannel1");
g_assert (filesrc_ch_1);
decodebin_ch_1 = gst_element_factory_make("decodebin", "decodechannel1");
g_assert (decodebin_ch_1);
audioconvert_ch_1 = gst_element_factory_make("audioconvert",
"audioconvertchannle1");
g_assert (audioconvert_ch_1);
/* channel 2*/
filesrc_ch_2 = gst_element_factory_make ("filesrc", "filesrcchannel2");
g_assert (filesrc_ch_2);
decodebin_ch_2 = gst_element_factory_make("decodebin", "decodechannel2");
g_assert (decodebin_ch_2);
audioconvert_ch_2 = gst_element_factory_make("audioconvert",
"audioconvertchannel2");
g_assert (audioconvert_ch_2);
interleave = gst_element_factory_make ("interleave", "interleave");
g_assert (interleave);
g_object_set (G_OBJECT (filesrc_ch_1), "location", argv[1], NULL);
g_object_set (G_OBJECT (filesrc_ch_2), "location", argv[2], NULL);
pad_ch_1 = gst_element_get_request_pad (interleave, "sink%d");
name1 = gst_pad_get_name (pad_ch_1);
g_print ("A new pad %s was created\n", name1);
pad_ch_2 = gst_element_get_request_pad (interleave, "sink%d");
name2 = gst_pad_get_name (pad_ch_2);
g_print ("A new pad %s was created\n", name2);
if (!gst_element_link (audioconvert_ch_1, decodebin_ch_1))
{
g_error ("Failed to link audioconvert_ch_1 and decodebin_ch_1");
}
if (!gst_element_link (audioconvert_ch_2, decodebin_ch_2))
{
g_error ("Failed to link audioconvert_ch_2 and decodebin_ch_2");
}
gst_bin_add_many (GST_BIN (pipeline), interleave, alsasink,
filesrc_ch_1, decodebin_ch_1, audioconvert_ch_1,
filesrc_ch_2, decodebin_ch_2, audioconvert_ch_2,
NULL);
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_callback, pipeline);
gst_object_unref (bus);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
/* now run */
g_main_loop_run (loop);
/* also clean up */
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (GST_OBJECT (pipeline));
return 0;
}
Thanks,
Saravanan.
Larsen & Toubro Limited
www.larsentoubro.com
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