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#include <stdlib.h>
#include <gst/gst.h>
#include <string.h>
static void
get_position_info (GstElement *cdparanoia)
{
GstFormat track_format;
const GstFormat *formats;
GstPad *pad;
track_format = gst_format_get_by_nick ("track");
g_assert (track_format != 0);
pad = gst_element_get_pad (cdparanoia, "src");
formats = gst_pad_get_formats (pad);
while (*formats) {
const GstFormatDefinition *definition;
GstFormat format;
gint64 position;
gboolean res;
definition = gst_format_get_details (*formats);
format = *formats;
res = gst_pad_query (pad, GST_QUERY_POSITION,
&format, &position);
if (format == GST_FORMAT_TIME) {
position /= GST_SECOND;
g_print ("%s: %lld:%02lld", definition->nick, position/60, position%60);
}
else {
g_print ("%s: %lld", definition->nick, position);
}
formats++;
if (*formats) {
g_print (", ");
}
}
g_print ("\r");
}
static void
get_track_info (GstElement *cdparanoia)
{
GstFormat track_format;
gint64 total_tracks = 0, total_time = 0;
GstPad *pad;
const GstFormat *formats;
gint i;
gint64 time_count = 0;
track_format = gst_format_get_by_nick ("track");
g_assert (track_format != 0);
pad = gst_element_get_pad (cdparanoia, "src");
formats = gst_pad_get_formats (pad);
/* we loop over all supported formats and report the total
* number of them */
while (*formats) {
const GstFormatDefinition *definition;
gint64 total;
GstFormat format;
gboolean res;
definition = gst_format_get_details (*formats);
format = *formats;
res = gst_pad_query (pad, GST_QUERY_TOTAL,
&format, &total);
if (res) {
if (format == GST_FORMAT_TIME) {
total /= GST_SECOND;
g_print ("%s total: %lld:%02lld\n", definition->nick, total/60, total%60);
}
else
g_print ("%s total: %lld\n", definition->nick, total);
if (format == track_format)
total_tracks = total;
else if (format == GST_FORMAT_TIME)
total_time = total;
}
else
g_print ("failed to get %s total\n", definition->nick);
formats++;
}
/* then we loop over all the tracks to get more info.
* since pad_convert always works from 0, the time from track 1 needs
* to be substracted from track 2 */
for (i = 0; i <= total_tracks; i++) {
gint64 time;
gboolean res;
if (i < total_tracks) {
GstFormat format;
format = GST_FORMAT_TIME;
res = gst_pad_convert (pad, track_format, i,
&format, &time);
time /= GST_SECOND;
}
else {
time = total_time;
res = TRUE;
}
if (res) {
/* for the first track (i==0) we wait until we have the
* time of the next track */
if (i > 0) {
gint64 length = time - time_count;
g_print ("track %d: %lld:%02lld -> %lld:%02lld, length: %lld:%02lld\n",
i-1,
time_count / 60, time_count % 60,
time / 60, time % 60,
length / 60, length % 60);
}
}
else {
g_print ("could not get time for track %d\n", i);
}
time_count = time;
}
}
int
main (int argc, char **argv)
{
GstElement *pipeline;
GstElement *cdparanoia;
GstElement *osssink;
GstPad *pad;
GstFormat track_format;
GstEvent *event;
gint count;
gboolean res;
gst_init (&argc, &argv);
pipeline = gst_pipeline_new ("pipeline");
cdparanoia = gst_element_factory_make ("cdparanoia", "cdparanoia");
g_assert (cdparanoia);
g_object_set (G_OBJECT (cdparanoia), "paranoia_mode", 0, NULL);
osssink = gst_element_factory_make ("osssink", "osssink");
g_assert (osssink);
gst_bin_add (GST_BIN (pipeline), cdparanoia);
gst_bin_add (GST_BIN (pipeline), osssink);
gst_element_link_pads (cdparanoia, "src", osssink, "sink");
g_signal_connect (G_OBJECT (pipeline), "deep_notify",
G_CALLBACK (gst_element_default_deep_notify), NULL);
gst_element_set_state (pipeline, GST_STATE_PAUSED);
/* now we go into probe mode */
get_track_info (cdparanoia);
track_format = gst_format_get_by_nick ("track");
g_assert (track_format != 0);
pad = gst_element_get_pad (cdparanoia, "src");
g_assert (pad);
g_print ("playing from track 3\n");
/* seek to track3 */
event = gst_event_new_seek (track_format |
GST_SEEK_METHOD_SET |
GST_SEEK_FLAG_FLUSH,
3);
res = gst_pad_send_event (pad, event);
if (!res)
g_warning ("seek failed");
gst_element_set_state (pipeline, GST_STATE_PLAYING);
count = 0;
while (gst_bin_iterate (GST_BIN (pipeline))) {
get_position_info (cdparanoia);
if (count++ > 500)
break;
}
gst_element_set_state (pipeline, GST_STATE_PAUSED);
g_print ("\nplaying from second 25 to second 29\n");
/* seek to some seconds */
event = gst_event_new_segment_seek (GST_FORMAT_TIME |
GST_SEEK_METHOD_SET |
GST_SEEK_FLAG_FLUSH,
25 * GST_SECOND, 29 * GST_SECOND);
res = gst_pad_send_event (pad, event);
if (!res)
g_warning ("seek failed");
gst_element_set_state (pipeline, GST_STATE_PLAYING);
while (gst_bin_iterate (GST_BIN (pipeline))) {
get_position_info (cdparanoia);
}
g_print ("\n");
/* shutdown everything again */
gst_element_set_state (pipeline, GST_STATE_NULL);
return 0;
}
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