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gst-play: Add -i parameter for instant rate changes

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Add a command line flag that enables use of the
instant rate changes flag when doing rate changes.
This commit is contained in:
Jan Schmidt 2018-08-21 02:21:23 +10:00 committed by Sebastian Dröge
parent 9f55f8c28e
commit 0bc8998bdf
1 changed files with 28 additions and 3 deletions
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31
tools/gst-play.c
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@ -55,6 +55,7 @@ typedef enum
GST_PLAY_TRICK_MODE_DEFAULT_NO_AUDIO,
GST_PLAY_TRICK_MODE_KEY_UNITS,
GST_PLAY_TRICK_MODE_KEY_UNITS_NO_AUDIO,
GST_PLAY_TRICK_MODE_INSTANT_RATE,
GST_PLAY_TRICK_MODE_LAST
} GstPlayTrickMode;
@ -104,6 +105,7 @@ typedef struct
} GstPlay;
static gboolean quiet = FALSE;
static gboolean instant_rate_changes = FALSE;
static gboolean play_bus_msg (GstBus * bus, GstMessage * msg, gpointer data);
static gboolean play_next (GstPlay * play);
@ -934,7 +936,7 @@ play_do_seek (GstPlay * play, gint64 pos, gdouble rate, GstPlayTrickMode mode)
if (!seekable)
return FALSE;
seek_flags = GST_SEEK_FLAG_FLUSH;
seek_flags = 0;
switch (mode) {
case GST_PLAY_TRICK_MODE_DEFAULT:
@ -955,6 +957,19 @@ play_do_seek (GstPlay * play, gint64 pos, gdouble rate, GstPlayTrickMode mode)
break;
}
/* See if we can do an instant rate change (not changing dir) */
if (mode & GST_PLAY_TRICK_MODE_INSTANT_RATE && rate * play->rate > 0) {
seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
seek_flags | GST_SEEK_FLAG_INSTANT_RATE_CHANGE,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
if (gst_element_send_event (play->playbin, seek)) {
goto done;
}
}
/* No instant rate change, need to do a flushing seek */
seek_flags |= GST_SEEK_FLAG_FLUSH;
if (rate >= 0)
seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
seek_flags | GST_SEEK_FLAG_ACCURATE,
@ -969,15 +984,21 @@ play_do_seek (GstPlay * play, gint64 pos, gdouble rate, GstPlayTrickMode mode)
if (!gst_element_send_event (play->playbin, seek))
return FALSE;
done:
play->rate = rate;
play->trick_mode = mode;
play->trick_mode = mode & ~GST_PLAY_TRICK_MODE_INSTANT_RATE;
return TRUE;
}
static void
play_set_playback_rate (GstPlay * play, gdouble rate)
{
if (play_set_rate_and_trick_mode (play, rate, play->trick_mode)) {
GstPlayTrickMode mode = play->trick_mode;
if (instant_rate_changes)
mode |= GST_PLAY_TRICK_MODE_INSTANT_RATE;
if (play_set_rate_and_trick_mode (play, rate, mode)) {
gst_print (_("Playback rate: %.2f"), rate);
gst_print (" \n");
} else {
@ -1460,6 +1481,10 @@ main (int argc, char **argv)
N_("Volume"), NULL},
{"playlist", 0, 0, G_OPTION_ARG_FILENAME, &playlist_file,
N_("Playlist file containing input media files"), NULL},
{"instant-rate-changes", 'i', 0, G_OPTION_ARG_NONE, &instant_rate_changes,
N_
("Use the experimental instant-rate-change flag when changing rate"),
NULL},
{"quiet", 'q', 0, G_OPTION_ARG_NONE, &quiet,
N_("Do not print any output (apart from errors)"), NULL},
{"use-playbin3", 0, 0, G_OPTION_ARG_NONE, &use_playbin3,