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sys/ximage/ximagesink.c: Avoid type checking in buffer casts.

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Original commit message from CVS:
* sys/ximage/ximagesink.c: (gst_ximage_buffer_finalize),
(gst_ximage_buffer_free), (gst_ximagesink_ximage_put),
(gst_ximagesink_setcaps), (gst_ximagesink_buffer_alloc):
Avoid type checking in buffer casts.
Avoid caps copy in buffer_alloc when we can.
Use pad_peer_accept.
This commit is contained in:
Wim Taymans 2006-06-22 12:03:14 +00:00
parent 96326bff9d
commit 261f55dd2a
3 changed files with 60 additions and 37 deletions
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9
ChangeLog
View file

@ -1,3 +1,12 @@
2006-06-22 Wim Taymans <wim@fluendo.com>
* sys/ximage/ximagesink.c: (gst_ximage_buffer_finalize),
(gst_ximage_buffer_free), (gst_ximagesink_ximage_put),
(gst_ximagesink_setcaps), (gst_ximagesink_buffer_alloc):
Avoid type checking in buffer casts.
Avoid caps copy in buffer_alloc when we can.
Use pad_peer_accept.
2006-06-22 Tim-Philipp Müller <tim at centricular dot net>
* gst-libs/gst/tag/tag.h:

2
common

@ -1 +1 @@
Subproject commit bbfa0146961f4ca61ddbca7b42360b5741a6354b
Subproject commit 123195d3bbcc0b6e1cf867d3a180685f8766a0be

86
sys/ximage/ximagesink.c
View file

@ -217,7 +217,7 @@ gst_ximage_buffer_finalize (GstXImageBuffer * ximage)
/* In that case we can reuse the image and add it to our image pool. */
GST_LOG_OBJECT (ximagesink, "recycling image %p in pool", ximage);
/* need to increment the refcount again to recycle */
gst_buffer_ref (GST_BUFFER (ximage));
gst_buffer_ref (GST_BUFFER_CAST (ximage));
g_mutex_lock (ximagesink->pool_lock);
ximagesink->buffer_pool = g_slist_prepend (ximagesink->buffer_pool, ximage);
g_mutex_unlock (ximagesink->pool_lock);
@ -234,7 +234,7 @@ gst_ximage_buffer_free (GstXImageBuffer * ximage)
/* make sure it is not recycled */
ximage->width = -1;
ximage->height = -1;
gst_buffer_unref (GST_BUFFER (ximage));
gst_buffer_unref (GST_BUFFER_CAST (ximage));
}
static void
@ -618,7 +618,7 @@ gst_ximagesink_ximage_put (GstXImageSink * ximagesink, GstXImageBuffer * ximage)
}
GST_LOG_OBJECT (ximagesink, "reffing %p as our current image", ximage);
ximagesink->cur_image =
GST_XIMAGE_BUFFER (gst_buffer_ref (GST_BUFFER (ximage)));
GST_XIMAGE_BUFFER (gst_buffer_ref (GST_BUFFER_CAST (ximage)));
}
/* Expose sends a NULL image, we take the latest frame */
@ -1298,7 +1298,7 @@ gst_ximagesink_setcaps (GstBaseSink * bsink, GstCaps * caps)
(GST_VIDEO_SINK_HEIGHT (ximagesink) != ximagesink->ximage->height))) {
GST_DEBUG_OBJECT (ximagesink, "our image is not usable anymore, unref %p",
ximagesink->ximage);
gst_buffer_unref (GST_BUFFER (ximagesink->ximage));
gst_buffer_unref (GST_BUFFER_CAST (ximagesink->ximage));
ximagesink->ximage = NULL;
}
@ -1464,8 +1464,16 @@ no_ximage:
}
}
/* Buffer management */
/* Buffer management
*
* The buffer_alloc function must either return a buffer with given size and
* caps or create a buffer with different caps attached to the buffer. This
* last option is called reverse negotiation, ie, where the sink suggests a
* different format from the upstream peer.
*
* We try to do reverse negotiation when our geometry changes and we like a
* resized buffer.
*/
static GstFlowReturn
gst_ximagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
@ -1473,9 +1481,9 @@ gst_ximagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
GstXImageSink *ximagesink;
GstXImageBuffer *ximage = NULL;
GstStructure *structure = NULL;
GstCaps *desired_caps = NULL;
GstFlowReturn ret = GST_FLOW_OK;
gboolean rev_nego = FALSE;
GstCaps *alloc_caps;
gboolean alloc_unref = FALSE;
gint width, height;
ximagesink = GST_XIMAGESINK (bsink);
@ -1484,9 +1492,14 @@ gst_ximagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
"a buffer of %d bytes was requested with caps %" GST_PTR_FORMAT
" and offset %" G_GUINT64_FORMAT, size, caps, offset);
desired_caps = gst_caps_copy (caps);
/* assume we're going to alloc what was requested, keep track of
* wheter we need to unref or not. When we suggest a new format
* upstream we will create a new caps that we need to unref. */
alloc_caps = caps;
alloc_unref = FALSE;
structure = gst_caps_get_structure (desired_caps, 0);
/* get struct to see what is requested */
structure = gst_caps_get_structure (caps, 0);
if (gst_structure_get_int (structure, "width", &width) &&
gst_structure_get_int (structure, "height", &height)) {
@ -1497,7 +1510,6 @@ gst_ximagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
/* We take the flow_lock because the window might go away */
g_mutex_lock (ximagesink->flow_lock);
if (!ximagesink->xwindow) {
g_mutex_unlock (ximagesink->flow_lock);
goto alloc;
@ -1525,35 +1537,44 @@ gst_ximagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
/* We would like another geometry */
if (width != result.w || height != result.h) {
int nom, den;
GstPad *peer = gst_pad_get_peer (GST_VIDEO_SINK_PAD (ximagesink));
GstCaps *desired_caps;
GstStructure *desired_struct;
if (!GST_IS_PAD (peer)) {
/* Is this situation possible ? */
goto alloc;
}
/* make a copy of the incomming caps to create the new
* suggestion. We can't use make_writable because we might
* then destroy the original caps which we still need when the
* peer does not accept the suggestion. */
desired_caps = gst_caps_copy (caps);
desired_struct = gst_caps_get_structure (desired_caps, 0);
GST_DEBUG ("we would love to receive a %dx%d video", result.w, result.h);
gst_structure_set (structure, "width", G_TYPE_INT, result.w, NULL);
gst_structure_set (structure, "height", G_TYPE_INT, result.h, NULL);
gst_structure_set (desired_struct, "width", G_TYPE_INT, result.w, NULL);
gst_structure_set (desired_struct, "height", G_TYPE_INT, result.h, NULL);
/* PAR property overrides the X calculated one */
if (ximagesink->par) {
nom = gst_value_get_fraction_numerator (ximagesink->par);
den = gst_value_get_fraction_denominator (ximagesink->par);
gst_structure_set (structure, "pixel-aspect-ratio",
gst_structure_set (desired_struct, "pixel-aspect-ratio",
GST_TYPE_FRACTION, nom, den, NULL);
} else if (ximagesink->xcontext->par) {
nom = gst_value_get_fraction_numerator (ximagesink->xcontext->par);
den = gst_value_get_fraction_denominator (ximagesink->xcontext->par);
gst_structure_set (structure, "pixel-aspect-ratio",
gst_structure_set (desired_struct, "pixel-aspect-ratio",
GST_TYPE_FRACTION, nom, den, NULL);
}
if (gst_pad_accept_caps (peer, desired_caps)) {
/* see if peer accepts our new suggestion, if there is no peer, this
* function returns true. */
if (gst_pad_peer_accept_caps (GST_VIDEO_SINK_PAD (ximagesink),
desired_caps)) {
gint bpp;
bpp = size / height / width;
rev_nego = TRUE;
/* we will not alloc a buffer of the new suggested caps. Make sure
* we also unref this new caps after we set it on the buffer. */
alloc_caps = desired_caps;
alloc_unref = TRUE;
width = result.w;
height = result.h;
size = bpp * width * height;
@ -1562,11 +1583,10 @@ gst_ximagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
} else {
GST_DEBUG ("peer pad does not accept our desired caps %" GST_PTR_FORMAT,
desired_caps);
rev_nego = FALSE;
/* we alloc a buffer with the original incomming caps */
width = GST_VIDEO_SINK_WIDTH (ximagesink);
height = GST_VIDEO_SINK_HEIGHT (ximagesink);
}
gst_object_unref (peer);
}
}
@ -1595,24 +1615,18 @@ alloc:
/* We haven't found anything, creating a new one */
if (!ximage) {
if (rev_nego) {
ximage = gst_ximagesink_ximage_new (ximagesink, desired_caps);
} else {
ximage = gst_ximagesink_ximage_new (ximagesink, caps);
}
ximage = gst_ximagesink_ximage_new (ximagesink, alloc_caps);
}
/* Now we should have a ximage, set appropriate caps on it */
if (ximage) {
if (rev_nego) {
gst_buffer_set_caps (GST_BUFFER (ximage), desired_caps);
} else {
gst_buffer_set_caps (GST_BUFFER (ximage), caps);
}
gst_buffer_set_caps (GST_BUFFER_CAST (ximage), alloc_caps);
}
gst_caps_unref (desired_caps);
/* could be our new reffed suggestion or the original unreffed caps */
if (alloc_unref)
gst_caps_unref (alloc_caps);
*buf = GST_BUFFER (ximage);
*buf = GST_BUFFER_CAST (ximage);
return ret;
}