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385b9ee5c4
Original commit message from CVS: merge in tagging Includes: - gsttag.[ch] - The definition of GstTagList and tag registering/querying - gsttaginterface.[ch] - Interface for elements that can handle setting of tags - updates and merges to gststructure.[ch] and gstvalue.[ch] - testsuite/tags - some tests for tagging - bugfixes - updates to make make distcheck work - updates the version number to 0.7.2.1 Does not include: - including tagging stuff in docs - extensive tests
107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/*
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* This example shows how to use interfaces and the tag subsystem.
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* It takes an mp3 file as input, and makes an ogg file out of it. While doing
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* this, it parses the filename and sets artist and title in the ogg file.
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* It assumes the filename to be "<artist> - <title>.mp3"
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*
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* Run the program as "retag <mp3 file>"
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*
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* To run this program, you need to have the gst-plugins package (specifically
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* the vorbis and mad plugins) installed.
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*/
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/* main header */
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#include <gst/gst.h>
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/* and a header we need for the string manipulation */
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#include <string.h>
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int
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main (int argc, char *argv[])
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{
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GstElement *bin, *filesrc, *decoder, *encoder, *filesink;
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gchar *artist, *title, *ext, *filename;
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/* initialize GStreamer */
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gst_init (&argc, &argv);
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/* check that the argument is there */
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if (argc != 2) {
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g_print ("usage: %s <mp3 file>\n", argv[0]);
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return 1;
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}
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/* parse the mp3 name */
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artist = strrchr (argv[1], '/');
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if (artist == NULL)
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artist = argv[1];
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artist = g_strdup (artist);
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ext = strrchr (artist, '.');
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if (ext) *ext = '\0';
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title = strstr (artist, " - ");
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if (title == NULL) {
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g_print ("The format of the mp3 file is invalid.\n");
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return 1;
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}
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*title = '\0';
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title += 3;
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/* create a new bin to hold the elements */
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bin = gst_pipeline_new ("pipeline");
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g_assert (bin);
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/* create a file reader */
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filesrc = gst_element_factory_make ("filesrc", "disk_source");
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g_assert (filesrc);
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/* now it's time to get the decoder */
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decoder = gst_element_factory_make ("mad", "decode");
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if (!decoder) {
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g_print ("could not find plugin \"mad\"");
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return 1;
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}
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/* create the encoder */
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encoder = gst_element_factory_make ("vorbisenc", "encoder");
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if (!encoder) {
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g_print ("cound not find plugin \"vorbisenc\"");
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return 1;
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}
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/* and a file writer */
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filesink = gst_element_factory_make ("filesink", "filesink");
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g_assert (filesink);
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/* set the filenames */
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filename = g_strdup_printf ("%s.ogg", argv[1]); /* easy solution */
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g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
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g_object_set (G_OBJECT (filesink), "location", filename, NULL);
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g_free (filename);
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/* make sure the tag setter uses our stuff
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(though that should already be default) */
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gst_tag_setter_set_merge_mode (GST_TAG_SETTER (encoder), GST_TAG_MERGE_KEEP);
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/* set the tagging information */
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gst_tag_setter_add (GST_TAG_SETTER (encoder), GST_TAG_MERGE_REPLACE,
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GST_TAG_ARTIST, artist,
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GST_TAG_TITLE, title,
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NULL);
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/* add objects to the main pipeline */
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gst_bin_add_many (GST_BIN (bin), filesrc, decoder, encoder, filesink, NULL);
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/* link the elements */
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gst_element_link_many (filesrc, decoder, encoder, filesink, NULL);
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/* start playing */
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gst_element_set_state (bin, GST_STATE_PLAYING);
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while (gst_bin_iterate (GST_BIN (bin)));
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/* stop the bin */
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gst_element_set_state (bin, GST_STATE_NULL);
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return 0;
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}
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