/**
* SECTION:gstsegment
+ * @title: GstSegment
* @short_description: Structure describing the configured region of interest
* in a media file.
* @see_also: #GstEvent
* interest in a media file, called a segment.
*
* The structure can be used for two purposes:
- * <itemizedlist>
- * <listitem><para>performing seeks (handling seek events)</para></listitem>
- * <listitem><para>tracking playback regions (handling newsegment events)</para></listitem>
- * </itemizedlist>
+ *
+ * * performing seeks (handling seek events)
+ * * tracking playback regions (handling newsegment events)
*
* The segment is usually configured by the application with a seek event which
* is propagated upstream and eventually handled by an element that performs the seek.
* For elements that need to perform operations on media data in stream_time,
* gst_segment_to_stream_time() can be used to convert a timestamp and the segment
* info to stream time (which is always between 0 and the duration of the stream).
- *
- * Last reviewed on 2012-03-29 (0.11.3)
+ */
+
+/* FIXME 2.0: remove unused format parameter.
+ * Most of the methods in gstsegment.c take and extra GstFormat format, just to
+ * verify segment->format == format.
+ * See https://bugzilla.gnome.org/show_bug.cgi?id=788979
*/
/**
* @start: the seek start value
* @stop_type: the seek method
* @stop: the seek stop value
- * @update: boolean holding whether position was updated.
+ * @update: (out) (allow-none): boolean holding whether position was updated.
*
* Update the segment structure with the field values of a seek event (see
* gst_event_new_seek()).
* If the caller can apply a rate change, it should update @segment
* rate and applied_rate after calling this function.
*
- * @update will be set to TRUE if a seek should be performed to the segment
- * position field. This field can be FALSE if, for example, only the @rate
+ * @update will be set to %TRUE if a seek should be performed to the segment
+ * position field. This field can be %FALSE if, for example, only the @rate
* has been changed but not the playback position.
*
* Returns: %TRUE if the seek could be performed.
if (segment->duration != -1)
start = MIN (start, segment->duration);
else
- start = MAX (start, 0);
+ start = MAX ((gint64) start, 0);
/* stop can be -1 if we have not configured a stop. */
switch (stop_type) {
/* if we have a valid stop time, make sure it is clipped */
if (stop != -1) {
if (segment->duration != -1)
- stop = CLAMP (stop, 0, segment->duration);
+ stop = CLAMP ((gint64) stop, 0, (gint64) segment->duration);
else
- stop = MAX (stop, 0);
+ stop = MAX ((gint64) stop, 0);
}
/* we can't have stop before start */
if (stop != -1) {
if (start > stop) {
+ GST_WARNING ("segment update failed: start(%" G_GUINT64_FORMAT
+ ") > stop(%" G_GUINT64_FORMAT ")", start, stop);
g_return_val_if_fail (start <= stop, FALSE);
return FALSE;
}
/* flush resets the running_time */
base = 0;
} else {
+ /* make sure the position is inside the segment start/stop */
+ position = CLAMP (position, segment->start, segment->stop);
+
/* remember the elapsed time */
base = gst_segment_to_running_time (segment, format, position);
+ GST_DEBUG ("updated segment.base: %" G_GUINT64_FORMAT, base);
}
if (update_start && rate > 0.0) {
segment->flags = GST_SEGMENT_FLAG_NONE;
if ((flags & GST_SEEK_FLAG_FLUSH) != 0)
segment->flags |= GST_SEGMENT_FLAG_RESET;
- if ((flags & GST_SEEK_FLAG_SKIP) != 0)
- segment->flags |= GST_SEGMENT_FLAG_SKIP;
+ if ((flags & GST_SEEK_FLAG_TRICKMODE) != 0)
+ segment->flags |= GST_SEGMENT_FLAG_TRICKMODE;
if ((flags & GST_SEEK_FLAG_SEGMENT) != 0)
segment->flags |= GST_SEGMENT_FLAG_SEGMENT;
+ if ((flags & GST_SEEK_FLAG_TRICKMODE_KEY_UNITS) != 0)
+ segment->flags |= GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS;
+ if ((flags & GST_SEEK_FLAG_TRICKMODE_NO_AUDIO) != 0)
+ segment->flags |= GST_SEGMENT_FLAG_TRICKMODE_NO_AUDIO;
segment->rate = rate;
segment->applied_rate = 1.0;
segment->time = start;
segment->position = position;
+ GST_INFO ("segment updated: %" GST_SEGMENT_FORMAT, segment);
+
return TRUE;
}
/**
+ * gst_segment_to_stream_time_full:
+ * @segment: a #GstSegment structure.
+ * @format: the format of the segment.
+ * @position: the position in the segment
+ * @stream_time: (out): result stream-time
+ *
+ * Translate @position to the total stream time using the currently configured
+ * segment. Compared to gst_segment_to_stream_time() this function can return
+ * negative stream-time.
+ *
+ * This function is typically used by elements that need to synchronize buffers
+ * against the clock or each other.
+ *
+ * @position can be any value and the result of this function for values outside
+ * of the segment is extrapolated.
+ *
+ * When 1 is returned, @position resulted in a positive stream-time returned
+ * in @stream_time.
+ *
+ * When this function returns -1, the returned @stream_time should be negated
+ * to get the real negative stream time.
+ *
+ * Returns: a 1 or -1 on success, 0 on failure.
+ *
+ * Since: 1.8
+ */
+gint
+gst_segment_to_stream_time_full (const GstSegment * segment, GstFormat format,
+ guint64 position, guint64 * stream_time)
+{
+ guint64 start, stop, time;
+ gdouble abs_applied_rate;
+ gint res;
+
+ /* format does not matter for -1 */
+ if (G_UNLIKELY (position == -1)) {
+ *stream_time = -1;
+ return 0;
+ }
+
+ g_return_val_if_fail (segment != NULL, 0);
+ g_return_val_if_fail (segment->format == format, 0);
+
+ stop = segment->stop;
+
+ start = segment->start;
+ time = segment->time;
+
+ /* time must be known */
+ if (G_UNLIKELY (time == -1))
+ return 0;
+
+ abs_applied_rate = ABS (segment->applied_rate);
+
+ /* add or subtract from segment time based on applied rate */
+ if (G_LIKELY (segment->applied_rate > 0.0)) {
+ if (G_LIKELY (position > start)) {
+ /* bring to uncorrected position in segment */
+ *stream_time = position - start;
+ /* correct for applied rate if needed */
+ if (G_UNLIKELY (abs_applied_rate != 1.0))
+ *stream_time *= abs_applied_rate;
+ /* correct for segment time */
+ *stream_time += time;
+ res = 1;
+ } else {
+ *stream_time = start - position;
+ if (G_UNLIKELY (abs_applied_rate != 1.0))
+ *stream_time *= abs_applied_rate;
+ if (*stream_time > time) {
+ *stream_time -= time;
+ res = -1;
+ } else {
+ *stream_time = time - *stream_time;
+ res = 1;
+ }
+ }
+ } else {
+ /* correct for segment time. Streams with a negative applied_rate
+ * have timestamps between start and stop, as usual, but have the
+ * time member starting high and going backwards. */
+ /* cannot continue without a known segment stop */
+ if (G_UNLIKELY (stop == -1))
+ return 0;
+ if (G_UNLIKELY (position > stop)) {
+ *stream_time = position - stop;
+ if (G_UNLIKELY (abs_applied_rate != 1.0))
+ *stream_time *= abs_applied_rate;
+ if (*stream_time > time) {
+ *stream_time -= time;
+ res = -1;
+ } else {
+ *stream_time = time - *stream_time;
+ res = 1;
+ }
+ } else {
+ *stream_time = stop - position;
+ if (G_UNLIKELY (abs_applied_rate != 1.0))
+ *stream_time *= abs_applied_rate;
+ *stream_time += time;
+ res = 1;
+ }
+ }
+
+ return res;
+}
+
+/**
* gst_segment_to_stream_time:
* @segment: a #GstSegment structure.
* @format: the format of the segment.
*
* Returns: the position in stream_time or -1 when an invalid position
* was given.
+ *
+ * Since: 1.8
*/
guint64
gst_segment_to_stream_time (const GstSegment * segment, GstFormat format,
guint64 position)
{
- guint64 result, start, stop, time;
+ guint64 result;
+
+ g_return_val_if_fail (segment != NULL, -1);
+ g_return_val_if_fail (segment->format == format, -1);
+
+ /* before the segment boundary */
+ if (G_UNLIKELY (position < segment->start)) {
+ GST_DEBUG ("position(%" G_GUINT64_FORMAT ") < start(%" G_GUINT64_FORMAT
+ ")", position, segment->start);
+ return -1;
+ }
+ /* after the segment boundary */
+ if (G_UNLIKELY (segment->stop != -1 && position > segment->stop)) {
+ GST_DEBUG ("position(%" G_GUINT64_FORMAT ") > stop(%" G_GUINT64_FORMAT
+ ")", position, segment->stop);
+ return -1;
+ }
+
+ if (gst_segment_to_stream_time_full (segment, format, position, &result) == 1)
+ return result;
+
+ return -1;
+}
+
+/**
+ * gst_segment_position_from_stream_time_full:
+ * @segment: a #GstSegment structure.
+ * @format: the format of the segment.
+ * @stream_time: the stream-time
+ * @position: (out): the resulting position in the segment
+ *
+ * Translate @stream_time to the segment position using the currently configured
+ * segment. Compared to gst_segment_position_from_stream_time() this function can
+ * return negative segment position.
+ *
+ * This function is typically used by elements that need to synchronize buffers
+ * against the clock or each other.
+ *
+ * @stream_time can be any value and the result of this function for values outside
+ * of the segment is extrapolated.
+ *
+ * When 1 is returned, @stream_time resulted in a positive position returned
+ * in @position.
+ *
+ * When this function returns -1, the returned @position should be negated
+ * to get the real negative segment position.
+ *
+ * Returns: a 1 or -1 on success, 0 on failure.
+ *
+ * Since: 1.8
+ */
+gint
+gst_segment_position_from_stream_time_full (const GstSegment * segment,
+ GstFormat format, guint64 stream_time, guint64 * position)
+{
+ guint64 start, time;
gdouble abs_applied_rate;
+ gint res;
/* format does not matter for -1 */
- if (G_UNLIKELY (position == -1))
- return -1;
+ if (G_UNLIKELY (stream_time == -1)) {
+ *position = -1;
+ return 0;
+ }
g_return_val_if_fail (segment != NULL, -1);
g_return_val_if_fail (segment->format == format, -1);
- stop = segment->stop;
+ start = segment->start;
+ time = segment->time;
- /* outside of the segment boundary stop */
- if (G_UNLIKELY (stop != -1 && position > stop))
- return -1;
+ /* time must be known */
+ if (G_UNLIKELY (time == -1))
+ return 0;
- start = segment->start;
+ abs_applied_rate = ABS (segment->applied_rate);
+
+ if (G_LIKELY (segment->applied_rate > 0.0)) {
+ if (G_LIKELY (stream_time > time)) {
+ res = 1;
+ *position = stream_time - time;
+ } else {
+ res = -1;
+ *position = time - stream_time;
+ }
+ /* correct for applied rate if needed */
+ if (G_UNLIKELY (abs_applied_rate != 1.0))
+ *position /= abs_applied_rate;
+
+ if (G_UNLIKELY (res == -1)) {
+ if (*position > start) {
+ *position -= start;
+ } else {
+ *position = start - *position;
+ res = 1;
+ }
+ } else {
+ *position += start;
+ }
+ } else {
+ GstClockTime stop = segment->stop;
+ /* cannot continue without a known segment stop */
+ if (G_UNLIKELY (stop == -1))
+ return 0;
+ if (G_UNLIKELY (time > stream_time)) {
+ res = -1;
+ *position = time - stream_time;
+ } else {
+ res = 1;
+ *position = stream_time - time;
+ }
+ if (G_UNLIKELY (abs_applied_rate != 1.0))
+ *position /= abs_applied_rate;
+ if (G_UNLIKELY (stop < *position)) {
+ if (G_LIKELY (res == 1)) {
+ *position -= stop;
+ res = -1;
+ } else {
+ *position += stop;
+ res = 1;
+ }
+ } else {
+ if (G_LIKELY (res == 1)) {
+ *position = stop - *position;
+ res = 1;
+ } else {
+ *position += stop;
+ res = 1;
+ }
+ }
+ }
+
+ return res;
+}
+
+/**
+ * gst_segment_position_from_stream_time:
+ * @segment: a #GstSegment structure.
+ * @format: the format of the segment.
+ * @stream_time: the stream_time in the segment
+ *
+ * Convert @stream_time into a position in the segment so that
+ * gst_segment_to_stream_time() with that position returns @stream_time.
+ *
+ * Returns: the position in the segment for @stream_time. This function returns
+ * -1 when @stream_time is -1 or when it is not inside @segment.
+ *
+ * Since: 1.8
+ */
+guint64
+gst_segment_position_from_stream_time (const GstSegment * segment,
+ GstFormat format, guint64 stream_time)
+{
+ guint64 position;
+ gint res;
+
+ g_return_val_if_fail (segment != NULL, -1);
+ g_return_val_if_fail (segment->format == format, -1);
+
+ res =
+ gst_segment_position_from_stream_time_full (segment, format, stream_time,
+ &position);
/* before the segment boundary */
- if (G_UNLIKELY (position < start))
+ if (G_UNLIKELY (position < segment->start)) {
+ GST_DEBUG ("position(%" G_GUINT64_FORMAT ") < start(%" G_GUINT64_FORMAT
+ ")", position, segment->start);
return -1;
+ }
- time = segment->time;
-
- /* time must be known */
- if (G_UNLIKELY (time == -1))
+ /* after the segment boundary */
+ if (G_UNLIKELY (segment->stop != -1 && position > segment->stop)) {
+ GST_DEBUG ("position(%" G_GUINT64_FORMAT ") > stop(%" G_GUINT64_FORMAT
+ ")", position, segment->stop);
return -1;
+ }
- /* bring to uncorrected position in segment */
- result = position - start;
+ if (res == 1)
+ return position;
- abs_applied_rate = ABS (segment->applied_rate);
+ return -1;
+}
- /* correct for applied rate if needed */
- if (G_UNLIKELY (abs_applied_rate != 1.0))
- result *= abs_applied_rate;
+/**
+ * gst_segment_to_running_time_full:
+ * @segment: a #GstSegment structure.
+ * @format: the format of the segment.
+ * @position: the position in the segment
+ * @running_time: (out) (allow-none): result running-time
+ *
+ * Translate @position to the total running time using the currently configured
+ * segment. Compared to gst_segment_to_running_time() this function can return
+ * negative running-time.
+ *
+ * This function is typically used by elements that need to synchronize buffers
+ * against the clock or each other.
+ *
+ * @position can be any value and the result of this function for values outside
+ * of the segment is extrapolated.
+ *
+ * When 1 is returned, @position resulted in a positive running-time returned
+ * in @running_time.
+ *
+ * When this function returns -1, the returned @running_time should be negated
+ * to get the real negative running time.
+ *
+ * Returns: a 1 or -1 on success, 0 on failure.
+ *
+ * Since: 1.6
+ */
+gint
+gst_segment_to_running_time_full (const GstSegment * segment, GstFormat format,
+ guint64 position, guint64 * running_time)
+{
+ gint res = 0;
+ guint64 result;
+ guint64 start, stop, offset;
+ gdouble abs_rate;
- /* add or subtract from segment time based on applied rate */
- if (G_LIKELY (segment->applied_rate > 0.0)) {
- /* correct for segment time */
- result += time;
+ if (G_UNLIKELY (position == -1)) {
+ GST_DEBUG ("invalid position (-1)");
+ goto done;
+ }
+
+ g_return_val_if_fail (segment != NULL, 0);
+ g_return_val_if_fail (segment->format == format, 0);
+
+ offset = segment->offset;
+
+ if (G_LIKELY (segment->rate > 0.0)) {
+ start = segment->start + offset;
+
+ /* bring to uncorrected position in segment */
+ if (position < start) {
+ /* negative value */
+ result = start - position;
+ res = -1;
+ } else {
+ result = position - start;
+ res = 1;
+ }
} else {
- /* correct for segment time, clamp at 0. Streams with a negative
- * applied_rate have timestamps between start and stop, as usual, but have
- * the time member starting high and going backwards. */
- if (G_LIKELY (time > result))
- result = time - result;
- else
- result = 0;
+ stop = segment->stop;
+
+ if (stop == -1 && segment->duration != -1)
+ stop = segment->start + segment->duration;
+
+ /* cannot continue if no stop position set or invalid offset */
+ g_return_val_if_fail (stop != -1, 0);
+ g_return_val_if_fail (stop >= offset, 0);
+
+ stop -= offset;
+
+ /* bring to uncorrected position in segment */
+ if (position > stop) {
+ /* negative value */
+ result = position - stop;
+ res = -1;
+ } else {
+ result = stop - position;
+ res = 1;
+ }
}
- return result;
+ if (running_time) {
+ /* scale based on the rate, avoid division by and conversion to
+ * float when not needed */
+ abs_rate = ABS (segment->rate);
+ if (G_UNLIKELY (abs_rate != 1.0))
+ result /= abs_rate;
+
+ /* correct for base of the segment */
+ if (res == 1)
+ /* positive, add base */
+ *running_time = result + segment->base;
+ else if (segment->base >= result) {
+ /* negative and base is bigger, subtract from base and we have a
+ * positive value again */
+ *running_time = segment->base - result;
+ res = 1;
+ } else {
+ /* negative and base is smaller, subtract base and remainder is
+ * negative */
+ *running_time = result - segment->base;
+ }
+ }
+ return res;
+
+done:
+ {
+ if (running_time)
+ *running_time = -1;
+ return 0;
+ }
}
/**
* segment. Position is a value between @segment start and stop time.
*
* This function is typically used by elements that need to synchronize to the
- * global clock in a pipeline. The runnning time is a constantly increasing value
+ * global clock in a pipeline. The running time is a constantly increasing value
* starting from 0. When gst_segment_init() is called, this value will reset to
* 0.
*
guint64 position)
{
guint64 result;
- guint64 start, stop;
- gdouble abs_rate;
-
- if (G_UNLIKELY (position == -1))
- return -1;
g_return_val_if_fail (segment != NULL, -1);
g_return_val_if_fail (segment->format == format, -1);
- start = segment->start;
-
- if (segment->rate > 0.0)
- start += segment->offset;
-
/* before the segment boundary */
- if (G_UNLIKELY (position < start))
+ if (G_UNLIKELY (position < segment->start)) {
+ GST_DEBUG ("position(%" G_GUINT64_FORMAT ") < start(%" G_GUINT64_FORMAT
+ ")", position, segment->start);
+ return -1;
+ }
+ /* after the segment boundary */
+ if (G_UNLIKELY (segment->stop != -1 && position > segment->stop)) {
+ GST_DEBUG ("position(%" G_GUINT64_FORMAT ") > stop(%" G_GUINT64_FORMAT
+ ")", position, segment->stop);
return -1;
-
- stop = segment->stop;
-
- if (G_LIKELY (segment->rate > 0.0)) {
- /* outside of the segment boundary stop */
- if (G_UNLIKELY (stop != -1 && position > stop))
- return -1;
-
- /* bring to uncorrected position in segment */
- result = position - start;
- } else {
- /* cannot continue if no stop position set or outside of
- * the segment. */
- if (G_UNLIKELY (stop == -1))
- return -1;
-
- stop -= segment->offset;
- if (G_UNLIKELY (position > stop))
- return -1;
-
- /* bring to uncorrected position in segment */
- result = stop - position;
}
- /* scale based on the rate, avoid division by and conversion to
- * float when not needed */
- abs_rate = ABS (segment->rate);
- if (G_UNLIKELY (abs_rate != 1.0))
- result /= abs_rate;
-
- /* correct for base of the segment */
- result += segment->base;
+ if (gst_segment_to_running_time_full (segment, format, position,
+ &result) == 1)
+ return result;
- return result;
+ return -1;
}
/**
* in @segment. @start and @stop are compared and clipped to @segment
* start and stop values.
*
- * If the function returns FALSE, @start and @stop are known to fall
+ * If the function returns %FALSE, @start and @stop are known to fall
* outside of @segment and @clip_start and @clip_stop are not updated.
*
- * When the function returns TRUE, @clip_start and @clip_stop will be
+ * When the function returns %TRUE, @clip_start and @clip_stop will be
* updated. If @clip_start or @clip_stop are different from @start or @stop
* respectively, the region fell partially in the segment.
*
* Note that when @stop is -1, @clip_stop will be set to the end of the
* segment. Depending on the use case, this may or may not be what you want.
*
- * Returns: TRUE if the given @start and @stop times fall partially or
- * completely in @segment, FALSE if the values are completely outside
+ * Returns: %TRUE if the given @start and @stop times fall partially or
+ * completely in @segment, %FALSE if the values are completely outside
* of the segment.
*/
gboolean
g_return_val_if_fail (segment->format == format, FALSE);
/* if we have a stop position and a valid start and start is bigger,
- * we're outside of the segment */
- if (G_UNLIKELY (segment->stop != -1 && start != -1 && start >= segment->stop))
+ * we're outside of the segment. (Special case) segment start and
+ * segment stop can be identical. In this case, if start is also identical,
+ * it's inside of segment */
+ if (G_UNLIKELY (segment->stop != -1 && start != -1 && (start > segment->stop
+ || (segment->start != segment->stop && start == segment->stop))))
return FALSE;
/* if a stop position is given and is before the segment start,
}
/**
- * gst_segment_to_position:
+ * gst_segment_position_from_running_time:
* @segment: a #GstSegment structure.
* @format: the format of the segment.
* @running_time: the running_time in the segment
*
* Returns: the position in the segment for @running_time. This function returns
* -1 when @running_time is -1 or when it is not inside @segment.
+ *
+ * Since: 1.8
*/
guint64
-gst_segment_to_position (const GstSegment * segment, GstFormat format,
- guint64 running_time)
+gst_segment_position_from_running_time (const GstSegment * segment,
+ GstFormat format, guint64 running_time)
{
- guint64 result;
- guint64 start, stop, base;
- gdouble abs_rate;
-
- if (G_UNLIKELY (running_time == -1))
- return -1;
+ guint64 position;
+ gint res;
g_return_val_if_fail (segment != NULL, -1);
- g_return_val_if_fail (segment->format == format, FALSE);
+ g_return_val_if_fail (segment->format == format, -1);
- base = segment->base;
+ res =
+ gst_segment_position_from_running_time_full (segment, format,
+ running_time, &position);
- /* this running_time was for a previous segment */
- if (running_time < base)
+ if (res != 1)
return -1;
- /* start by subtracting the base time */
- result = running_time - base;
+ /* before the segment boundary */
+ if (G_UNLIKELY (position < segment->start)) {
+ GST_DEBUG ("position(%" G_GUINT64_FORMAT ") < start(%" G_GUINT64_FORMAT
+ ")", position, segment->start);
+ return -1;
+ }
+
+ /* after the segment boundary */
+ if (G_UNLIKELY (segment->stop != -1 && position > segment->stop)) {
+ GST_DEBUG ("position(%" G_GUINT64_FORMAT ") > stop(%" G_GUINT64_FORMAT
+ ")", position, segment->stop);
+ return -1;
+ }
+
+ return position;
+}
+
+/**
+ * gst_segment_position_from_running_time_full:
+ * @segment: a #GstSegment structure.
+ * @format: the format of the segment.
+ * @running_time: the running-time
+ * @position: (out): the resulting position in the segment
+ *
+ * Translate @running_time to the segment position using the currently configured
+ * segment. Compared to gst_segment_position_from_running_time() this function can
+ * return negative segment position.
+ *
+ * This function is typically used by elements that need to synchronize buffers
+ * against the clock or each other.
+ *
+ * @running_time can be any value and the result of this function for values
+ * outside of the segment is extrapolated.
+ *
+ * When 1 is returned, @running_time resulted in a positive position returned
+ * in @position.
+ *
+ * When this function returns -1, the returned @position was < 0, and the value
+ * in the position variable should be negated to get the real negative segment
+ * position.
+ *
+ * Returns: a 1 or -1 on success, 0 on failure.
+ *
+ * Since: 1.8
+ */
+gint
+gst_segment_position_from_running_time_full (const GstSegment * segment,
+ GstFormat format, guint64 running_time, guint64 * position)
+{
+ gint res;
+ guint64 start, stop, base;
+ gdouble abs_rate;
+
+ if (G_UNLIKELY (running_time == -1)) {
+ *position = -1;
+ return 0;
+ }
+
+ g_return_val_if_fail (segment != NULL, 0);
+ g_return_val_if_fail (segment->format == format, 0);
+
+ base = segment->base;
- /* move into the segment at the right rate */
abs_rate = ABS (segment->rate);
- if (G_UNLIKELY (abs_rate != 1.0))
- result = ceil (result * abs_rate);
start = segment->start;
stop = segment->stop;
if (G_LIKELY (segment->rate > 0.0)) {
- /* bring to corrected position in segment */
- result += start;
-
- /* outside of the segment boundary stop */
- if (G_UNLIKELY (stop != -1 && result > stop))
- return -1;
+ /* start by subtracting the base time */
+ if (G_LIKELY (running_time >= base)) {
+ *position = running_time - base;
+ /* move into the segment at the right rate */
+ if (G_UNLIKELY (abs_rate != 1.0))
+ *position = ceil (*position * abs_rate);
+ /* bring to corrected position in segment */
+ *position += start + segment->offset;
+ res = 1;
+ } else {
+ *position = base - running_time;
+ if (G_UNLIKELY (abs_rate != 1.0))
+ *position = ceil (*position * abs_rate);
+ if (start + segment->offset >= *position) {
+ /* The TS is before the segment, but the result is >= 0 */
+ *position = start + segment->offset - *position;
+ res = 1;
+ } else {
+ /* The TS is before the segment, and the result is < 0
+ * so negate the return result */
+ *position = *position - (start + segment->offset);
+ res = -1;
+ }
+ }
} else {
- /* cannot continue if no stop position set or outside of
- * the segment. */
- if (G_UNLIKELY (stop == -1 || result + start > stop))
- return -1;
-
- /* bring to corrected position in segment */
- result = stop - result;
+ if (G_LIKELY (running_time >= base)) {
+ *position = running_time - base;
+ if (G_UNLIKELY (abs_rate != 1.0))
+ *position = ceil (*position * abs_rate);
+ if (G_UNLIKELY (stop < *position + segment->offset)) {
+ *position += segment->offset - stop;
+ res = -1;
+ } else {
+ *position = stop - *position - segment->offset;
+ res = 1;
+ }
+ } else {
+ /* This case is tricky. Requested running time precedes the
+ * segment base, so in a reversed segment where rate < 0, that
+ * means it's before the alignment point of (stop - offset).
+ * Before = always bigger than (stop-offset), which is usually +ve,
+ * but could be -ve is offset is big enough. -ve position implies
+ * that the offset has clipped away the entire segment anyway */
+ *position = base - running_time;
+ if (G_UNLIKELY (abs_rate != 1.0))
+ *position = ceil (*position * abs_rate);
+
+ if (G_LIKELY (stop + *position >= segment->offset)) {
+ *position = stop + *position - segment->offset;
+ res = 1;
+ } else {
+ /* Requested position is still negative because offset is big,
+ * so negate the result */
+ *position = segment->offset - *position - stop;
+ res = -1;
+ }
+ }
}
- return result;
+ return res;
}
+/**
+ * gst_segment_to_position:
+ * @segment: a #GstSegment structure.
+ * @format: the format of the segment.
+ * @running_time: the running_time in the segment
+ *
+ * Convert @running_time into a position in the segment so that
+ * gst_segment_to_running_time() with that position returns @running_time.
+ *
+ * Returns: the position in the segment for @running_time. This function returns
+ * -1 when @running_time is -1 or when it is not inside @segment.
+ *
+ * Deprecated: Use gst_segment_position_from_running_time() instead.
+ */
+#ifndef GST_REMOVE_DEPRECATED
+guint64
+gst_segment_to_position (const GstSegment * segment, GstFormat format,
+ guint64 running_time)
+{
+ return gst_segment_position_from_running_time (segment, format, running_time);
+}
+#endif
/**
* gst_segment_set_running_time:
guint64 start, stop;
/* start by bringing the running_time into the segment position */
- position = gst_segment_to_position (segment, format, running_time);
+ position =
+ gst_segment_position_from_running_time (segment, format, running_time);
/* we must have a valid position now */
if (G_UNLIKELY (position == -1))
return TRUE;
}
+
+/**
+ * gst_segment_offset_running_time:
+ * @segment: a #GstSegment structure.
+ * @format: the format of the segment.
+ * @offset: the offset to apply in the segment
+ *
+ * Adjust the values in @segment so that @offset is applied to all
+ * future running-time calculations.
+ *
+ * Since: 1.2.3
+ *
+ * Returns: %TRUE if the segment could be updated successfully. If %FALSE is
+ * returned, @offset is not in @segment.
+ */
+gboolean
+gst_segment_offset_running_time (GstSegment * segment, GstFormat format,
+ gint64 offset)
+{
+ g_return_val_if_fail (segment != NULL, FALSE);
+ g_return_val_if_fail (segment->format == format, FALSE);
+
+ if (offset == 0)
+ return TRUE;
+
+ if (offset > 0) {
+ /* positive offset, we can simply apply to the base time */
+ segment->base += offset;
+ } else {
+ offset = -offset;
+ /* negative offset, first try to subtract from base */
+ if (segment->base > offset) {
+ segment->base -= offset;
+ } else {
+ guint64 position;
+
+ /* subtract all from segment.base, remainder in offset */
+ offset -= segment->base;
+ segment->base = 0;
+ position =
+ gst_segment_position_from_running_time (segment, format, offset);
+ if (position == -1)
+ return FALSE;
+
+ segment->offset = position - segment->start;
+ }
+ }
+ return TRUE;
+}
+
+/**
+ * gst_segment_is_equal:
+ * @s0: a #GstSegment structure.
+ * @s1: a #GstSegment structure.
+ *
+ * Checks for two segments being equal. Equality here is defined
+ * as perfect equality, including floating point values.
+ *
+ * Since: 1.6
+ *
+ * Returns: %TRUE if the segments are equal, %FALSE otherwise.
+ */
+gboolean
+gst_segment_is_equal (const GstSegment * s0, const GstSegment * s1)
+{
+ if (s0->flags != s1->flags)
+ return FALSE;
+ if (s0->rate != s1->rate)
+ return FALSE;
+ if (s0->applied_rate != s1->applied_rate)
+ return FALSE;
+ if (s0->format != s1->format)
+ return FALSE;
+ if (s0->base != s1->base)
+ return FALSE;
+ if (s0->offset != s1->offset)
+ return FALSE;
+ if (s0->start != s1->start)
+ return FALSE;
+ if (s0->stop != s1->stop)
+ return FALSE;
+ if (s0->time != s1->time)
+ return FALSE;
+ if (s0->position != s1->position)
+ return FALSE;
+ if (s0->duration != s1->duration)
+ return FALSE;
+ return TRUE;
+}
projects / platform / upstream / gstreamer.git / blobdiff