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meta: add return vale to transform

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Add a boolean return value so that we can see when a transform fails.
This commit is contained in:
Wim Taymans 2012-02-28 16:17:47 +01:00
parent 6e0e782025
commit f0105dd81f
3 changed files with 41 additions and 33 deletions
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8
gst/gstmeta.h
View file

@ -148,10 +148,12 @@ typedef struct {
* Implementations should check the @type of the transform and parse
* additional type specific fields in @data that should be used to update
* the metadata on @transbuf.
*
* Returns: %TRUE if the transform could be performed
*/
typedef void (*GstMetaTransformFunction) (GstBuffer *transbuf,
GstMeta *meta, GstBuffer *buffer,
GQuark type, gpointer data);
typedef gboolean (*GstMetaTransformFunction) (GstBuffer *transbuf,
GstMeta *meta, GstBuffer *buffer,
GQuark type, gpointer data);
/**
* GstMetaInfo:

40
libs/gst/net/gstnetaddressmeta.c
View file

@ -33,28 +33,35 @@
#include "gstnetaddressmeta.h"
static gboolean
net_address_meta_init (GstNetAddressMeta * meta, gpointer params,
GstBuffer * buffer)
net_address_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer)
{
meta->addr = NULL;
GstNetAddressMeta *nmeta = (GstNetAddressMeta *) meta;
nmeta->addr = NULL;
return TRUE;
}
static gboolean
net_address_meta_transform (GstBuffer * transbuf, GstMeta * meta,
GstBuffer * buffer, GQuark type, gpointer data)
{
GstNetAddressMeta *nmeta = (GstNetAddressMeta *) meta;
/* we always copy no matter what transform */
gst_buffer_add_net_address_meta (transbuf, nmeta->addr);
return TRUE;
}
static void
net_address_meta_transform (GstBuffer * transbuf, GstNetAddressMeta * meta,
GstBuffer * buffer, GQuark type, gpointer data)
net_address_meta_free (GstMeta * meta, GstBuffer * buffer)
{
/* we always copy no matter what transform */
gst_buffer_add_net_address_meta (transbuf, meta->addr);
}
GstNetAddressMeta *nmeta = (GstNetAddressMeta *) meta;
static void
net_address_meta_free (GstNetAddressMeta * meta, GstBuffer * buffer)
{
if (meta->addr)
g_object_unref (meta->addr);
meta->addr = NULL;
if (nmeta->addr)
g_object_unref (nmeta->addr);
nmeta->addr = NULL;
}
const GstMetaInfo *
@ -66,9 +73,8 @@ gst_net_address_meta_get_info (void)
if (meta_info == NULL) {
meta_info = gst_meta_register ("GstNetAddressMeta", "GstNetAddressMeta",
sizeof (GstNetAddressMeta),
(GstMetaInitFunction) net_address_meta_init,
(GstMetaFreeFunction) net_address_meta_free,
(GstMetaTransformFunction) net_address_meta_transform, tags);
net_address_meta_init,
net_address_meta_free, net_address_meta_transform, tags);
}
return meta_info;
}

26
tests/check/gst/gstmeta.c
View file

@ -63,27 +63,28 @@ gst_meta_test_init (GstMetaTest * meta)
}
#endif
static void
test_init_func (GstMetaTest * meta, GstBuffer * buffer)
static gboolean
test_init_func (GstMeta * meta, gpointer params, GstBuffer * buffer)
{
GST_DEBUG ("init called on buffer %p, meta %p", buffer, meta);
/* nothing to init really, the init function is mostly for allocating
* additional memory or doing special setup as part of adding the metadata to
* the buffer*/
return TRUE;
}
static void
test_free_func (GstMetaTest * meta, GstBuffer * buffer)
test_free_func (GstMeta * meta, GstBuffer * buffer)
{
GST_DEBUG ("free called on buffer %p, meta %p", buffer, meta);
/* nothing to free really */
}
static void
test_transform_func (GstBuffer * transbuf, GstMetaTest * meta,
static gboolean
test_transform_func (GstBuffer * transbuf, GstMeta * meta,
GstBuffer * buffer, GQuark type, gpointer data)
{
GstMetaTest *test;
GstMetaTest *test, *tmeta = (GstMetaTest *) meta;
GST_DEBUG ("transform %s called from buffer %p to %p, meta %p",
g_quark_to_string (type), buffer, transbuf, meta);
@ -94,11 +95,11 @@ test_transform_func (GstBuffer * transbuf, GstMetaTest * meta,
test = GST_META_TEST_ADD (transbuf);
if (copy_data->offset == 0) {
/* same offset, copy timestamps */
test->pts = meta->pts;
test->dts = meta->dts;
test->pts = tmeta->pts;
test->dts = tmeta->dts;
if (copy_data->size == gst_buffer_get_size (buffer)) {
/* same size, copy duration */
test->duration = meta->duration;
test->duration = tmeta->duration;
} else {
/* else clear */
test->duration = GST_CLOCK_TIME_NONE;
@ -108,8 +109,9 @@ test_transform_func (GstBuffer * transbuf, GstMetaTest * meta,
test->dts = -1;
test->duration = -1;
}
test->clock_rate = meta->clock_rate;
test->clock_rate = tmeta->clock_rate;
}
return TRUE;
}
static const GstMetaInfo *
@ -121,9 +123,7 @@ gst_meta_test_get_info (void)
if (meta_test_info == NULL) {
meta_test_info = gst_meta_register ("GstMetaTest", "GstMetaTest",
sizeof (GstMetaTest),
(GstMetaInitFunction) test_init_func,
(GstMetaFreeFunction) test_free_func,
(GstMetaTransformFunction) test_transform_func, tags);
test_init_func, test_free_func, test_transform_func, tags);
}
return meta_test_info;
}