mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-27 12:11:13 +00:00
Code Issues 1 Projects Releases Wiki Activity

adapter: use pts/dts on buffers

Browse source
This commit is contained in:
Wim Taymans 2011-10-28 12:16:21 +02:00
parent 0941cc9fb8
commit a495701900
2 changed files with 72 additions and 32 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

101
libs/gst/base/gstadapter.c
View file

@ -128,8 +128,10 @@ GST_DEBUG_CATEGORY_STATIC (gst_adapter_debug);
struct _GstAdapterPrivate
{
GstClockTime timestamp;
guint64 distance;
GstClockTime pts;
guint64 pts_distance;
GstClockTime dts;
guint64 dts_distance;
gsize scan_offset;
GSList *scan_entry;
@ -163,8 +165,10 @@ gst_adapter_init (GstAdapter * adapter)
adapter->priv = GST_ADAPTER_GET_PRIVATE (adapter);
adapter->assembled_data = g_malloc (DEFAULT_SIZE);
adapter->assembled_size = DEFAULT_SIZE;
adapter->priv->timestamp = GST_CLOCK_TIME_NONE;
adapter->priv->distance = 0;
adapter->priv->pts = GST_CLOCK_TIME_NONE;
adapter->priv->pts_distance = 0;
adapter->priv->dts = GST_CLOCK_TIME_NONE;
adapter->priv->dts_distance = 0;
}
static void
@ -218,23 +222,30 @@ gst_adapter_clear (GstAdapter * adapter)
adapter->size = 0;
adapter->skip = 0;
adapter->assembled_len = 0;
adapter->priv->timestamp = GST_CLOCK_TIME_NONE;
adapter->priv->distance = 0;
adapter->priv->pts = GST_CLOCK_TIME_NONE;
adapter->priv->pts_distance = 0;
adapter->priv->dts = GST_CLOCK_TIME_NONE;
adapter->priv->dts_distance = 0;
adapter->priv->scan_offset = 0;
adapter->priv->scan_entry = NULL;
}
static inline void
update_timestamp (GstAdapter * adapter, GstBuffer * buf)
update_timestamps (GstAdapter * adapter, GstBuffer * buf)
{
GstClockTime timestamp;
GstClockTime pts, dts;
timestamp = GST_BUFFER_TIMESTAMP (buf);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
GST_LOG_OBJECT (adapter, "new timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
adapter->priv->timestamp = timestamp;
adapter->priv->distance = 0;
pts = GST_BUFFER_PTS (buf);
if (GST_CLOCK_TIME_IS_VALID (pts)) {
GST_LOG_OBJECT (adapter, "new pts %" GST_TIME_FORMAT, GST_TIME_ARGS (pts));
adapter->priv->pts = pts;
adapter->priv->pts_distance = 0;
}
dts = GST_BUFFER_DTS (buf);
if (GST_CLOCK_TIME_IS_VALID (dts)) {
GST_LOG_OBJECT (adapter, "new dts %" GST_TIME_FORMAT, GST_TIME_ARGS (dts));
adapter->priv->dts = dts;
adapter->priv->dts_distance = 0;
}
}
@ -308,7 +319,7 @@ gst_adapter_push (GstAdapter * adapter, GstBuffer * buf)
if (G_UNLIKELY (adapter->buflist == NULL)) {
GST_LOG_OBJECT (adapter, "pushing first %" G_GSIZE_FORMAT " bytes", size);
adapter->buflist = adapter->buflist_end = g_slist_append (NULL, buf);
update_timestamp (adapter, buf);
update_timestamps (adapter, buf);
} else {
/* Otherwise append to the end, and advance our end pointer */
GST_LOG_OBJECT (adapter, "pushing %" G_GSIZE_FORMAT " bytes at end, "
@ -542,7 +553,8 @@ gst_adapter_flush_unchecked (GstAdapter * adapter, gsize flush)
/* take skip into account */
flush += adapter->skip;
/* distance is always at least the amount of skipped bytes */
priv->distance -= adapter->skip;
priv->pts_distance -= adapter->skip;
priv->dts_distance -= adapter->skip;
g = adapter->buflist;
cur = g->data;
@ -550,7 +562,8 @@ gst_adapter_flush_unchecked (GstAdapter * adapter, gsize flush)
while (flush >= size) {
/* can skip whole buffer */
GST_LOG_OBJECT (adapter, "flushing out head buffer");
priv->distance += size;
priv->pts_distance += size;
priv->dts_distance += size;
flush -= size;
gst_buffer_unref (cur);
@ -561,15 +574,16 @@ gst_adapter_flush_unchecked (GstAdapter * adapter, gsize flush)
adapter->buflist_end = NULL;
break;
}
/* there is a new head buffer, update the timestamp */
/* there is a new head buffer, update the timestamps */
cur = g->data;
update_timestamp (adapter, cur);
update_timestamps (adapter, cur);
size = gst_buffer_get_size (cur);
}
adapter->buflist = g;
/* account for the remaining bytes */
adapter->skip = flush;
adapter->priv->distance += flush;
adapter->priv->pts_distance += flush;
adapter->priv->dts_distance += flush;
/* invalidate scan position */
priv->scan_offset = 0;
priv->scan_entry = NULL;
@ -855,32 +869,57 @@ gst_adapter_available_fast (GstAdapter * adapter)
}
/**
* gst_adapter_prev_timestamp:
* gst_adapter_prev_pts:
* @adapter: a #GstAdapter
* @distance: (out) (allow-none): pointer to location for distance, or NULL
*
* Get the timestamp that was before the current byte in the adapter. When
* @distance is given, the amount of bytes between the timestamp and the current
* Get the pts that was before the current byte in the adapter. When
* @distance is given, the amount of bytes between the pts and the current
* position is returned.
*
* The timestamp is reset to GST_CLOCK_TIME_NONE and the distance is set to 0 when
* The pts is reset to GST_CLOCK_TIME_NONE and the distance is set to 0 when
* the adapter is first created or when it is cleared. This also means that before
* the first byte with a timestamp is removed from the adapter, the timestamp
* the first byte with a pts is removed from the adapter, the pts
* and distance returned are GST_CLOCK_TIME_NONE and 0 respectively.
*
* Returns: The previously seen timestamp.
*
* Since: 0.10.24
* Returns: The previously seen pts.
*/
GstClockTime
gst_adapter_prev_timestamp (GstAdapter * adapter, guint64 * distance)
gst_adapter_prev_pts (GstAdapter * adapter, guint64 * distance)
{
g_return_val_if_fail (GST_IS_ADAPTER (adapter), GST_CLOCK_TIME_NONE);
if (distance)
*distance = adapter->priv->distance;
*distance = adapter->priv->pts_distance;
return adapter->priv->timestamp;
return adapter->priv->pts;
}
/**
* gst_adapter_prev_dts:
* @adapter: a #GstAdapter
* @distance: (out) (allow-none): pointer to location for distance, or NULL
*
* Get the dts that was before the current byte in the adapter. When
* @distance is given, the amount of bytes between the dts and the current
* position is returned.
*
* The dts is reset to GST_CLOCK_TIME_NONE and the distance is set to 0 when
* the adapter is first created or when it is cleared. This also means that before
* the first byte with a dts is removed from the adapter, the dts
* and distance returned are GST_CLOCK_TIME_NONE and 0 respectively.
*
* Returns: The previously seen dts.
*/
GstClockTime
gst_adapter_prev_dts (GstAdapter * adapter, guint64 * distance)
{
g_return_val_if_fail (GST_IS_ADAPTER (adapter), GST_CLOCK_TIME_NONE);
if (distance)
*distance = adapter->priv->dts_distance;
return adapter->priv->dts;
}
/**

3
libs/gst/base/gstadapter.h
View file

@ -90,7 +90,8 @@ GList* gst_adapter_take_list (GstAdapter *adapter, gs
gsize gst_adapter_available (GstAdapter *adapter);
gsize gst_adapter_available_fast (GstAdapter *adapter);
GstClockTime gst_adapter_prev_timestamp (GstAdapter *adapter, guint64 *distance);
GstClockTime gst_adapter_prev_pts (GstAdapter *adapter, guint64 *distance);
GstClockTime gst_adapter_prev_dts (GstAdapter *adapter, guint64 *distance);
gsize gst_adapter_masked_scan_uint32 (GstAdapter * adapter, guint32 mask,
guint32 pattern, gsize offset, gsize size);