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xvimagesink: Suggest caps with different width/height if bufferalloc is called with impossible width/height

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This commit is contained in:
Sebastian Dröge 2010-08-11 18:08:59 +02:00
parent acc7d51ce5
commit 59ba05a95d
1 changed files with 96 additions and 23 deletions
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95
sys/xvimage/xvimagesink.c
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@ -2452,6 +2452,54 @@ gst_xvimagesink_event (GstBaseSink * sink, GstEvent * event)
/* Buffer management */
static GstCaps *
gst_xvimage_sink_different_size_suggestion (GstXvImageSink * xvimagesink,
GstCaps * caps)
{
GstCaps *intersection;
GstCaps *new_caps;
GstStructure *s;
gint width, height;
gint par_n = 1, par_d = 1;
gint dar_n, dar_d;
gint w, h;
new_caps = gst_caps_copy (caps);
s = gst_caps_get_structure (new_caps, 0);
gst_structure_get_int (s, "width", &width);
gst_structure_get_int (s, "height", &height);
gst_structure_get_fraction (s, "pixel-aspect-ratio", &par_n, &par_d);
gst_structure_remove_field (s, "width");
gst_structure_remove_field (s, "height");
gst_structure_remove_field (s, "pixel-aspect-ratio");
intersection = gst_caps_intersect (xvimagesink->xcontext->caps, new_caps);
gst_caps_unref (new_caps);
if (gst_caps_is_empty (intersection))
return intersection;
s = gst_caps_get_structure (intersection, 0);
gst_util_fraction_multiply (width, height, par_n, par_d, &dar_n, &dar_d);
/* xvimagesink supports all PARs */
gst_structure_fixate_field_nearest_int (s, "width", width);
gst_structure_fixate_field_nearest_int (s, "height", height);
gst_structure_get_int (s, "width", &w);
gst_structure_get_int (s, "height", &h);
gst_util_fraction_multiply (h, w, dar_n, dar_d, &par_n, &par_d);
gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d,
NULL);
return intersection;
}
static GstFlowReturn
gst_xvimagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
@ -2462,7 +2510,6 @@ gst_xvimagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
GstCaps *intersection = NULL;
GstStructure *structure = NULL;
gint width, height, image_format;
GstCaps *new_caps;
xvimagesink = GST_XVIMAGESINK (bsink);
@ -2496,13 +2543,29 @@ gst_xvimagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
GST_PTR_FORMAT, intersection);
if (gst_caps_is_empty (intersection)) {
GstCaps *new_caps;
gst_caps_unref (intersection);
/* So we don't support this kind of buffer, let's define one we'd like */
new_caps = gst_caps_copy (caps);
structure = gst_caps_get_structure (new_caps, 0);
if (!gst_structure_has_field (structure, "width") ||
!gst_structure_has_field (structure, "height")) {
gst_caps_unref (new_caps);
goto invalid;
}
/* Try with YUV first */
/* Try different dimensions */
intersection =
gst_xvimage_sink_different_size_suggestion (xvimagesink, new_caps);
if (gst_caps_is_empty (intersection)) {
/* Try with different YUV formats first */
gst_structure_set_name (structure, "video/x-raw-yuv");
/* Remove format specific fields */
gst_structure_remove_field (structure, "format");
gst_structure_remove_field (structure, "endianness");
gst_structure_remove_field (structure, "depth");
@ -2513,8 +2576,14 @@ gst_xvimagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
gst_structure_remove_field (structure, "alpha_mask");
/* Reuse intersection with Xcontext */
gst_caps_unref (intersection);
intersection = gst_caps_intersect (xvimagesink->xcontext->caps, new_caps);
}
if (gst_caps_is_empty (intersection)) {
/* Try with different dimensions and YUV formats */
intersection =
gst_xvimage_sink_different_size_suggestion (xvimagesink, new_caps);
}
if (gst_caps_is_empty (intersection)) {
/* Now try with RGB */
@ -2522,19 +2591,24 @@ gst_xvimagesink_buffer_alloc (GstBaseSink * bsink, guint64 offset, guint size,
/* And interset again */
gst_caps_unref (intersection);
intersection = gst_caps_intersect (xvimagesink->xcontext->caps, new_caps);
}
if (gst_caps_is_empty (intersection)) {
/* Try with different dimensions and RGB formats */
intersection =
gst_xvimage_sink_different_size_suggestion (xvimagesink, new_caps);
}
/* Clean this copy */
gst_caps_unref (new_caps);
if (gst_caps_is_empty (intersection))
goto incompatible;
}
/* Clean this copy */
gst_caps_unref (new_caps);
/* We want fixed caps */
gst_caps_truncate (intersection);
GST_DEBUG_OBJECT (xvimagesink, "allocating a buffer with caps %"
GST_PTR_FORMAT, intersection);
} else if (gst_caps_is_equal (intersection, caps)) {
if (gst_caps_is_equal (intersection, caps)) {
/* Things work better if we return a buffer with the same caps ptr
* as was asked for when we can */
gst_caps_replace (&intersection, caps);
@ -2618,9 +2692,8 @@ incompatible:
{
GST_WARNING_OBJECT (xvimagesink, "we were requested a buffer with "
"caps %" GST_PTR_FORMAT ", but our xcontext caps %" GST_PTR_FORMAT
" are completely incompatible with those caps", new_caps,
" are completely incompatible with those caps", caps,
xvimagesink->xcontext->caps);
gst_caps_unref (new_caps);
ret = GST_FLOW_NOT_NEGOTIATED;
g_mutex_unlock (xvimagesink->pool_lock);
goto beach;