experimental-legacy/ecdb/trunk/tools/ecdb_transcode_helper/ecdb_transcode_helper.c

140 lines
3.2 KiB
C

#include <gst/gst.h>
GstElement *pipeline, *audio;
static gboolean
bus_call(GstBus *bus, GstMessage *msg, gpointer data)
{
GMainLoop *loop = (GMainLoop *) data;
switch (GST_MESSAGE_TYPE(msg))
{
case GST_MESSAGE_EOS:
{
g_print("EOS\n");
g_main_loop_quit(loop);
break;
}
case GST_MESSAGE_ERROR:
{
gchar *debug;
GError *err;
gst_message_parse_error(msg, &err, &debug);
g_free(debug);
g_print("%s\n", err->message);
g_error_free(err);
g_main_loop_quit(loop);
break;
}
default:
break;
}
return TRUE;
}
static void
cb_newpad (GstElement *decodebin, GstPad *pad, gboolean last, gpointer data)
{
GstCaps *caps;
GstStructure *str;
GstPad *audiopad;
audiopad = gst_element_get_static_pad (audio, "sink");
if (GST_PAD_IS_LINKED (audiopad))
{
g_object_unref (audiopad);
return;
}
caps = gst_pad_get_caps (pad);
str = gst_caps_get_structure (caps, 0);
if (!g_strrstr (gst_structure_get_name (str), "audio"))
{
gst_caps_unref (caps);
gst_object_unref (audiopad);
return;
}
gst_caps_unref (caps);
gst_pad_link (pad, audiopad);
}
int
main (int argc, char ** argv)
{
GMainLoop *loop;
GstElement *src, *dec, *conv, *resample, *filter, *sink;
GstCaps *filtercaps;
GstPad *audiopad;
GstBus *bus;
gchar *path, *filename;
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
if (argc != 2)
{
g_print ("Error: no supplied file!\n");
return 1;
}
pipeline = gst_pipeline_new ("pipeline");
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);
src = gst_element_factory_make ("filesrc", NULL);
g_object_set (G_OBJECT (src), "location", argv[1], NULL);
dec = gst_element_factory_make ("decodebin", NULL);
g_signal_connect (dec, "new-decoded-pad", G_CALLBACK (cb_newpad), NULL);
gst_bin_add_many (GST_BIN (pipeline), src, dec, NULL);
gst_element_link (src, dec);
audio = gst_bin_new ("audiobin");
conv = gst_element_factory_make ("audioconvert", NULL);
/* Here's the bit of magic */
resample = gst_element_factory_make("audioresample", NULL);
filter = gst_element_factory_make("capsfilter", NULL);
filtercaps = gst_caps_new_full(gst_structure_new("audio/x-raw-int",
"channels", G_TYPE_INT, 2,
"width", G_TYPE_INT, 16,
"depth", G_TYPE_INT, 16,
"endianness", G_TYPE_INT, 1234,
"rate", G_TYPE_INT, 44100,
"signed", G_TYPE_BOOLEAN, TRUE,
NULL), NULL);
g_object_set(GST_OBJECT(filter), "caps", filtercaps, NULL);
gst_caps_unref(filtercaps);
audiopad = gst_element_get_static_pad(conv, "sink");
sink = gst_element_factory_make ("filesink", NULL);
/* Generate filename */
filename = g_path_get_basename(argv[1]);
path = g_strconcat("/tmp/ecdb/", filename, ".wav", NULL);
g_object_set(G_OBJECT(sink), "location", path, NULL);
free(filename);
free(path);
gst_bin_add_many(GST_BIN (audio), conv, resample, filter, sink, NULL);
gst_element_link_many(conv, resample, filter, sink, NULL);
gst_element_add_pad (audio, gst_ghost_pad_new ("sink", audiopad));
gst_object_unref (audiopad);
gst_bin_add (GST_BIN (pipeline), audio);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
g_main_loop_run (loop);
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (GST_OBJECT (pipeline));
return 0;
}