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