*/
#include "gst_private.h"
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
#include "gstbuffer.h"
#include "gstinfo.h"
#include "gstutils.h"
static GType _gst_buffer_type = 0;
+/* buffer alignment in bytes
+ * an alignment of 8 would be the same as malloc() guarantees
+ */
+#ifdef HAVE_POSIX_MEMALIGN
+#if defined(BUFFER_ALIGNMENT_MALLOC)
+static size_t _gst_buffer_data_alignment = 8;
+#elif defined(BUFFER_ALIGNMENT_PAGESIZE)
+static size_t _gst_buffer_data_alignment = 0;
+#elif defined(BUFFER_ALIGNMENT)
+static size_t _gst_buffer_data_alignment = BUFFER_ALIGNMENT;
+#else
+#error "No buffer alignment configured"
+#endif
+
+static inline gboolean
+aligned_malloc (gpointer * memptr, guint size)
+{
+ gint res;
+
+ res = posix_memalign (memptr, _gst_buffer_data_alignment, size);
+ return (res == 0);
+}
+
+#endif /* HAVE_POSIX_MEMALIGN */
+
void
_gst_buffer_initialize (void)
{
* done from multiple threads;
* see http://bugzilla.gnome.org/show_bug.cgi?id=304551 */
g_type_class_ref (gst_buffer_get_type ());
+#ifdef HAVE_GETPAGESIZE
+#ifdef BUFFER_ALIGNMENT_PAGESIZE
+ _gst_buffer_data_alignment = getpagesize ();
+#endif
+#endif
}
#define _do_init \
#if GST_VERSION_NANO == 1
/* we enable this extra debugging in git versions only for now */
- g_return_if_fail (gst_buffer_is_metadata_writable (dest));
+ g_warn_if_fail (gst_buffer_is_metadata_writable (dest));
#endif
GST_CAT_LOG (GST_CAT_BUFFER, "copy %p to %p", src, dest);
copy = gst_buffer_new ();
/* we simply copy everything from our parent */
+#ifdef HAVE_POSIX_MEMALIGN
+ {
+ gpointer memptr = NULL;
+
+ if (G_LIKELY (buffer->size)) {
+ if (G_UNLIKELY (!aligned_malloc (&memptr, buffer->size))) {
+ /* terminate on error like g_memdup() would */
+ g_error ("%s: failed to allocate %u bytes", G_STRLOC, buffer->size);
+ } else {
+ memcpy (memptr, buffer->data, buffer->size);
+ }
+ }
+ copy->data = (guint8 *) memptr;
+ GST_BUFFER_FREE_FUNC (copy) = free;
+ }
+#else
copy->data = g_memdup (buffer->data, buffer->size);
+#endif
+
/* make sure it gets freed (even if the parent is subclassed, we return a
normal buffer) */
copy->malloc_data = copy->data;
* Creates a newly allocated buffer without any data.
*
* MT safe.
- * Returns: the new #GstBuffer.
+ *
+ * Returns: (transfer full): the new #GstBuffer.
*/
GstBuffer *
gst_buffer_new (void)
* Note that when @size == 0, the buffer data pointer will be NULL.
*
* MT safe.
- * Returns: the new #GstBuffer.
+ *
+ * Returns: (transfer full): the new #GstBuffer.
*/
GstBuffer *
gst_buffer_new_and_alloc (guint size)
newbuf = gst_buffer_new ();
+#ifdef HAVE_POSIX_MEMALIGN
+ {
+ gpointer memptr = NULL;
+
+ if (G_LIKELY (size)) {
+ if (G_UNLIKELY (!aligned_malloc (&memptr, size))) {
+ /* terminate on error like g_memdup() would */
+ g_error ("%s: failed to allocate %u bytes", G_STRLOC, size);
+ }
+ }
+ newbuf->malloc_data = (guint8 *) memptr;
+ GST_BUFFER_FREE_FUNC (newbuf) = free;
+ }
+#else
newbuf->malloc_data = g_malloc (size);
+#endif
GST_BUFFER_DATA (newbuf) = newbuf->malloc_data;
GST_BUFFER_SIZE (newbuf) = size;
*
* MT safe.
*
- * Returns: a new #GstBuffer, or NULL if the memory couldn't be allocated.
+ * Returns: (transfer full): a new #GstBuffer, or NULL if the memory couldn't
+ * be allocated.
*
* Since: 0.10.13
*/
{
GstBuffer *newbuf;
guint8 *malloc_data;
+#ifdef HAVE_POSIX_MEMALIGN
+ gpointer memptr = NULL;
+ if (G_LIKELY (size)) {
+ if (G_UNLIKELY (!aligned_malloc (&memptr, size))) {
+ GST_CAT_WARNING (GST_CAT_BUFFER, "failed to allocate %d bytes", size);
+ return NULL;
+ }
+ }
+ malloc_data = (guint8 *) memptr;
+#else
malloc_data = g_try_malloc (size);
if (G_UNLIKELY (malloc_data == NULL && size != 0)) {
GST_CAT_WARNING (GST_CAT_BUFFER, "failed to allocate %d bytes", size);
return NULL;
}
+#endif
/* FIXME: there's no g_type_try_create_instance() in GObject yet, so this
* will still abort if a new GstBuffer structure can't be allocated */
GST_BUFFER_MALLOCDATA (newbuf) = malloc_data;
GST_BUFFER_DATA (newbuf) = malloc_data;
GST_BUFFER_SIZE (newbuf) = size;
+#ifdef HAVE_POSIX_MEMALIGN
+ GST_BUFFER_FREE_FUNC (newbuf) = free;
+#endif
GST_CAT_LOG (GST_CAT_BUFFER, "new %p of size %d", newbuf, size);
* Gets the media type of the buffer. This can be NULL if there
* is no media type attached to this buffer.
*
- * Returns: a reference to the #GstCaps. unref after usage.
+ * Returns: (transfer full): a reference to the #GstCaps. unref after usage.
* Returns NULL if there were no caps on this buffer.
*/
/* this is not made atomic because if the buffer were reffed from multiple
/**
* gst_buffer_set_caps:
* @buffer: a #GstBuffer.
- * @caps: a #GstCaps.
+ * @caps: (transfer none): a #GstCaps.
*
* Sets the media type on the buffer. The refcount of the caps will
* be increased and any previous caps on the buffer will be
gst_buffer_set_caps (GstBuffer * buffer, GstCaps * caps)
{
g_return_if_fail (buffer != NULL);
+ g_return_if_fail (caps == NULL || GST_CAPS_IS_SIMPLE (caps));
+
#if GST_VERSION_NANO == 1
/* we enable this extra debugging in git versions only for now */
- g_return_if_fail (gst_buffer_is_metadata_writable (buffer));
+ g_warn_if_fail (gst_buffer_is_metadata_writable (buffer));
+ /* FIXME: would be nice to also check if caps are fixed here, but expensive */
#endif
gst_caps_replace (&GST_BUFFER_CAPS (buffer), caps);
/**
* gst_buffer_make_metadata_writable:
- * @buf: a #GstBuffer
+ * @buf: (transfer full): a #GstBuffer
*
* Similar to gst_buffer_make_writable, but does not ensure that the buffer
* data array is writable. Instead, this just ensures that the returned buffer
* After calling this function, @buf should not be referenced anymore. The
* result of this function has guaranteed writable metadata.
*
- * Returns: A new #GstBuffer with writable metadata.
+ * Returns: (transfer full): a new #GstBuffer with writable metadata, which
+ * may or may not be the same as @buf.
*/
GstBuffer *
gst_buffer_make_metadata_writable (GstBuffer * buf)
* to #GST_CLOCK_TIME_NONE and #GST_BUFFER_OFFSET_NONE.
*
* MT safe.
- * Returns: the new #GstBuffer.
- * Returns NULL if the arguments were invalid.
+ *
+ * Returns: (transfer full): the new #GstBuffer or NULL if the arguments were
+ * invalid.
*/
GstBuffer *
gst_buffer_create_sub (GstBuffer * buffer, guint offset, guint size)
gboolean complete;
g_return_val_if_fail (buffer != NULL, NULL);
- g_return_val_if_fail (buffer->mini_object.refcount > 0, NULL);
+ g_return_val_if_fail (buffer->mini_object.refcount, NULL);
g_return_val_if_fail (buffer->size >= offset + size, NULL);
/* find real parent */
gst_buffer_is_span_fast (GstBuffer * buf1, GstBuffer * buf2)
{
g_return_val_if_fail (buf1 != NULL && buf2 != NULL, FALSE);
- g_return_val_if_fail (buf1->mini_object.refcount > 0, FALSE);
- g_return_val_if_fail (buf2->mini_object.refcount > 0, FALSE);
+ g_return_val_if_fail (buf1->mini_object.refcount, FALSE);
+ g_return_val_if_fail (buf2->mini_object.refcount, FALSE);
/* it's only fast if we have subbuffers of the same parent */
return (GST_IS_SUBBUFFER (buf1) &&
* gst_buffer_is_span_fast() to determine if a memcpy will be needed.
*
* MT safe.
- * Returns: the new #GstBuffer that spans the two source buffers.
- * Returns NULL if the arguments are invalid.
+ *
+ * Returns: (transfer full): the new #GstBuffer that spans the two source
+ * buffers, or NULL if the arguments are invalid.
*/
GstBuffer *
gst_buffer_span (GstBuffer * buf1, guint32 offset, GstBuffer * buf2,
GstBuffer *newbuf;
g_return_val_if_fail (buf1 != NULL && buf2 != NULL, NULL);
- g_return_val_if_fail (buf1->mini_object.refcount > 0, NULL);
- g_return_val_if_fail (buf2->mini_object.refcount > 0, NULL);
- g_return_val_if_fail (len > 0, NULL);
+ g_return_val_if_fail (buf1->mini_object.refcount, NULL);
+ g_return_val_if_fail (buf2->mini_object.refcount, NULL);
+ g_return_val_if_fail (len, NULL);
g_return_val_if_fail (len <= buf1->size + buf2->size - offset, NULL);
/* if the two buffers have the same parent and are adjacent */
projects / platform / upstream / gstreamer.git / blobdiff