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videorate: Factor out a method for themax-duplication-time property

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Sensibly simplifying gst_video_rate_transform_ip

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/668>
This commit is contained in:
Thibault Saunier 2020-05-25 16:29:15 -04:00
parent 39c321835b
commit 6e82eb28f3
1 changed files with 59 additions and 50 deletions
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109
gst/videorate/gstvideorate.c
View file

@ -1334,6 +1334,62 @@ gst_video_rate_switch_mode_if_needed (GstVideoRate * videorate)
return skip;
}
static gboolean
gst_video_rate_do_max_duplicate (GstVideoRate * videorate, GstBuffer * buffer,
GstClockTime intime, GstClockTime prevtime, gint * count)
{
if (videorate->max_duplication_time <= 0)
return TRUE;
/* We already know that intime and prevtime are not out of order, based
* on the previous condition. Using ABS in case rate < 0, in which case
* the order is reversed. */
if (ABS (GST_CLOCK_DIFF (intime, prevtime)) > videorate->max_duplication_time) {
GST_DEBUG_OBJECT (videorate,
"The new buffer (%" GST_TIME_FORMAT
") is further away from previous buffer (%" GST_TIME_FORMAT
") than max-duplication-time (%" GST_TIME_FORMAT ")",
GST_TIME_ARGS (intime), GST_TIME_ARGS (prevtime),
GST_TIME_ARGS (videorate->max_duplication_time));
/* First send out enough buffers to actually reach the time of the
* previous buffer */
if (videorate->segment.rate < 0.0) {
while (videorate->next_ts > prevtime) {
gst_video_rate_flush_prev (videorate, *count > 0, GST_CLOCK_TIME_NONE);
*count += 1;
}
} else {
while (videorate->next_ts <= prevtime) {
gst_video_rate_flush_prev (videorate, *count > 0, GST_CLOCK_TIME_NONE);
*count += 1;
}
}
if (*count > 1) {
videorate->dup += *count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
}
/* The gap between the two buffers is too large. Don't fill it, just
* let a discont through */
videorate->discont = TRUE;
if (videorate->segment.rate < 0.0) {
videorate->base_ts -= prevtime - intime;
} else {
videorate->base_ts += intime - prevtime;
}
videorate->next_ts = intime;
/* Swap in new buffer and get rid of old buffer so that starting with
* the next input buffer we output from the new position */
gst_video_rate_swap_prev (videorate, buffer, intime);
return FALSE;
}
return TRUE;
}
static GstFlowReturn
gst_video_rate_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
{
@ -1489,56 +1545,9 @@ gst_video_rate_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
goto done;
}
if (videorate->max_duplication_time > 0) {
/* We already know that intime and prevtime are not out of order, based
* on the previous condition. Using ABS in case rate < 0, in which case
* the order is reversed. */
if (ABS (GST_CLOCK_DIFF (intime,
prevtime)) > videorate->max_duplication_time) {
GST_DEBUG_OBJECT (videorate,
"The new buffer (%" GST_TIME_FORMAT
") is further away from previous buffer (%"
GST_TIME_FORMAT ") than max-duplication-time (%" GST_TIME_FORMAT
")", GST_TIME_ARGS (intime), GST_TIME_ARGS (prevtime),
GST_TIME_ARGS (videorate->max_duplication_time));
/* First send out enough buffers to actually reach the time of the
* previous buffer */
if (videorate->segment.rate < 0.0) {
while (videorate->next_ts > prevtime) {
gst_video_rate_flush_prev (videorate, count > 0,
GST_CLOCK_TIME_NONE);
count += 1;
}
} else {
while (videorate->next_ts <= prevtime) {
gst_video_rate_flush_prev (videorate, count > 0,
GST_CLOCK_TIME_NONE);
count += 1;
}
}
if (count > 1) {
videorate->dup += count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
}
/* The gap between the two buffers is too large. Don't fill it, just
* let a discont through */
videorate->discont = TRUE;
if (videorate->segment.rate < 0.0) {
videorate->base_ts -= prevtime - intime;
} else {
videorate->base_ts += intime - prevtime;
}
videorate->next_ts = intime;
/* Swap in new buffer and get rid of old buffer so that starting with
* the next input buffer we output from the new position */
gst_video_rate_swap_prev (videorate, buffer, intime);
goto done;
}
}
if (!gst_video_rate_do_max_duplicate (videorate, buffer, intime, prevtime,
&count))
goto done;
/* got 2 buffers, see which one is the best */
do {