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baseparse: Add a mode/flag for disabling PTS interpolation

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To be used by sub-classes implementing video formats with reordering
such as MPEG.
This commit is contained in:
Jan Schmidt 2012-09-12 22:44:37 -07:00
parent f4b530ed9e
commit 196caf5ed6
1 changed files with 22 additions and 1 deletions
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23
libs/gst/base/gstbaseparse.c
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@ -246,6 +246,7 @@ struct _GstBaseParsePrivate
guint min_frame_size;
gboolean passthrough;
gboolean pts_interpolate;
gboolean syncable;
gboolean has_timing_info;
guint fps_num, fps_den;
@ -725,6 +726,7 @@ gst_base_parse_reset (GstBaseParse * parse)
parse->priv->next_dts = 0;
parse->priv->syncable = TRUE;
parse->priv->passthrough = FALSE;
parse->priv->pts_interpolate = TRUE;
parse->priv->has_timing_info = FALSE;
parse->priv->post_min_bitrate = TRUE;
parse->priv->post_avg_bitrate = TRUE;
@ -1910,7 +1912,7 @@ gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
parse->priv->next_dts =
GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
if (GST_BUFFER_PTS_IS_VALID (buffer)) {
if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
GstClockTime next_pts =
GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
if (next_pts >= parse->priv->next_dts)
@ -3336,6 +3338,25 @@ gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
}
/**
* gst_base_parse_set_pts_interpolation:
* @parse: a #GstBaseParse
* @passthrough: %TRUE if parser should interpolate PTS timestamps
*
* By default, the base class will guess PTS timestamps using a simple
* interpolation (previous timestamp + duration), which is incorrect for
* data streams with reordering, where PTS can go backward. Sub-classes
* implementing such formats should disable PTS interpolation.
*/
void
gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
gboolean pts_interpolate)
{
parse->priv->pts_interpolate = pts_interpolate;
GST_INFO_OBJECT (parse, "PTS interpolation: %s",
(pts_interpolate) ? "yes" : "no");
}
/**
* gst_base_parse_set_latency:
* @parse: a #GstBaseParse