static void
gst_videodrop_chain (GstPad * pad, GstData * data)
{
GstVideodrop *videodrop = GST_VIDEODROP (gst_pad_get_parent (pad));
GstBuffer *buf;
if (GST_IS_EVENT (data)) {
GstEvent *event = GST_EVENT (data);
if (GST_EVENT_TYPE (event) == GST_EVENT_DISCONTINUOUS) {
/* since we rely on timestamps of the source, we need to handle
* changes in time carefully. */
gint64 time;
if (gst_event_discont_get_value (event, GST_FORMAT_TIME, &time)) {
videodrop->total = videodrop->pass = 0;
videodrop->time_adjust = time;
} else {
GST_ELEMENT_ERROR (videodrop, STREAM, TOO_LAZY, (NULL),
("Received discont, but no time information"));
gst_event_unref (event);
return;
}
/* FIXME: increase timestamp / speed */
}
gst_pad_event_default (pad, event);
return;
}
buf = GST_BUFFER (data);
videodrop->total++;
GST_DEBUG ("Received buffer at %u:%02u:%02u:%09u, fps=%lf, pass=%"
G_GUINT64_FORMAT " of " G_GUINT64_FORMAT ", speed=%lf",
(guint) (GST_BUFFER_TIMESTAMP (buf) / (GST_SECOND * 60 * 60)),
(guint) ((GST_BUFFER_TIMESTAMP (buf) / (GST_SECOND * 60)) % 60),
(guint) ((GST_BUFFER_TIMESTAMP (buf) / GST_SECOND) % 60),
(guint) (GST_BUFFER_TIMESTAMP (buf) % GST_SECOND),
videodrop->to_fps, videodrop->total, videodrop->pass, videodrop->speed);
while (((GST_BUFFER_TIMESTAMP (buf) - videodrop->time_adjust) /
videodrop->speed * videodrop->to_fps / GST_SECOND) >=
videodrop->pass) {
/* since we write to the struct (time/duration), we need a new struct,
* but we don't want to copy around data - a subbuffer is the easiest
* way to accomplish that... */
GstBuffer *copy = gst_buffer_create_sub (buf, 0, GST_BUFFER_SIZE (buf));
/* adjust timestamp/duration and push forward */
GST_BUFFER_TIMESTAMP (copy) = (videodrop->time_adjust / videodrop->speed) +
GST_SECOND * videodrop->pass / videodrop->to_fps;
GST_BUFFER_DURATION (copy) = GST_SECOND / videodrop->to_fps;
GST_DEBUG ("Sending out buffer from out %u:%02u:%02u:%09u",
(guint) (GST_BUFFER_TIMESTAMP (copy) / (GST_SECOND * 60 * 60)),
(guint) ((GST_BUFFER_TIMESTAMP (copy) / (GST_SECOND * 60)) % 60),
(guint) ((GST_BUFFER_TIMESTAMP (copy) / GST_SECOND) % 60),
(guint) (GST_BUFFER_TIMESTAMP (copy) % GST_SECOND));
gst_pad_push (videodrop->srcpad, GST_DATA (copy));
videodrop->pass++;
}
gst_buffer_unref (buf);
}
static gboolean
dxr3videosink_handle_event (GstPad * pad, GstEvent * event)
{
GstEventType type;
Dxr3VideoSink *sink;
sink = DXR3VIDEOSINK (gst_pad_get_parent (pad));
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_EMPTY:
//fprintf (stderr, "++++++ Video empty event\n");
{
/* FIXME: Handle this with a discontinuity or something. */
/* Write an MPEG2 sequence end code, to ensure that the card
actually displays the last picture. Apparently some DVDs are
encoded without proper sequence end codes. */
static const guint8 sec[4] = { 0x00, 0x00, 0x01, 0xb7 };
if (sink->cur_buf != NULL) {
dxr3videosink_write_data (sink, 0);
}
write (sink->video_fd, &sec, 4);
}
break;
case GST_EVENT_DISCONTINUOUS:
//fprintf (stderr, "++++++ Video discont event\n");
{
gint64 time;
gboolean has_time;
unsigned cur_scr, mpeg_scr, diff;
has_time = gst_event_discont_get_value (event, GST_FORMAT_TIME, &time);
if (has_time) {
/* fprintf (stderr, "^^^^^^ Discontinuous event has time %.4f\n", */
/* (double) time / GST_SECOND); */
/* If the SCR in the card is way off, fix it. */
ioctl (sink->control_fd, EM8300_IOCTL_SCR_GET, &cur_scr);
mpeg_scr = MPEGTIME_TO_DXRTIME (GSTTIME_TO_MPEGTIME (time));
diff = cur_scr > mpeg_scr ? cur_scr - mpeg_scr : mpeg_scr - cur_scr;
if (diff > 1800) {
unsigned zero = 0;
/* fprintf (stderr, "====== Adjusting SCR from video\n"); */
ioctl (sink->control_fd, EM8300_IOCTL_SCR_SET, &zero);
ioctl (sink->control_fd, EM8300_IOCTL_SCR_SET, &mpeg_scr);
}
} else {
/* fprintf (stderr, "^^^^^^ Discontinuous event has no time\n"); */
}
}
break;
case GST_EVENT_FLUSH:
dxr3videosink_reset_parser (sink);
break;
default:
gst_pad_event_default (pad, event);
break;
}
return TRUE;
}
