*/
#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"
#include "gstminiobject.h"
+#include "gstversion.h"
-static void gst_buffer_init (GTypeInstance * instance, gpointer g_class);
-static void gst_buffer_class_init (gpointer g_class, gpointer class_data);
static void gst_buffer_finalize (GstBuffer * buffer);
static GstBuffer *_gst_buffer_copy (GstBuffer * buffer);
-static GType gst_subbuffer_get_type (void);
-static GType _gst_subbuffer_type = 0;
static GType _gst_buffer_type = 0;
-void
-_gst_buffer_initialize (void)
+/* 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)
{
- gpointer ptr;
+ gint res;
- gst_buffer_get_type ();
- gst_subbuffer_get_type ();
+ res = posix_memalign (memptr, _gst_buffer_data_alignment, size);
+ return (res == 0);
+}
+#endif /* HAVE_POSIX_MEMALIGN */
+
+void
+_gst_buffer_initialize (void)
+{
/* the GstMiniObject types need to be class_ref'd once before it can be
* done from multiple threads;
* see http://bugzilla.gnome.org/show_bug.cgi?id=304551 */
- ptr = g_type_class_ref (GST_TYPE_BUFFER);
- g_type_class_unref (ptr);
- ptr = g_type_class_ref (_gst_subbuffer_type);
- g_type_class_unref (ptr);
+ g_type_class_ref (gst_buffer_get_type ());
+#ifdef HAVE_GETPAGESIZE
+#ifdef BUFFER_ALIGNMENT_PAGESIZE
+ _gst_buffer_data_alignment = getpagesize ();
+#endif
+#endif
}
-GType
-gst_buffer_get_type (void)
-{
- if (G_UNLIKELY (_gst_buffer_type == 0)) {
- static const GTypeInfo buffer_info = {
- sizeof (GstBufferClass),
- NULL,
- NULL,
- gst_buffer_class_init,
- NULL,
- NULL,
- sizeof (GstBuffer),
- 0,
- gst_buffer_init,
- NULL
- };
-
- _gst_buffer_type = g_type_register_static (GST_TYPE_MINI_OBJECT,
- "GstBuffer", &buffer_info, 0);
- }
- return _gst_buffer_type;
+#define _do_init \
+{ \
+ _gst_buffer_type = g_define_type_id; \
}
+G_DEFINE_TYPE_WITH_CODE (GstBuffer, gst_buffer, GST_TYPE_MINI_OBJECT, _do_init);
+
static void
-gst_buffer_class_init (gpointer g_class, gpointer class_data)
+gst_buffer_class_init (GstBufferClass * klass)
{
- GstBufferClass *buffer_class = GST_BUFFER_CLASS (g_class);
-
- buffer_class->mini_object_class.copy =
- (GstMiniObjectCopyFunction) _gst_buffer_copy;
- buffer_class->mini_object_class.finalize =
+ klass->mini_object_class.copy = (GstMiniObjectCopyFunction) _gst_buffer_copy;
+ klass->mini_object_class.finalize =
(GstMiniObjectFinalizeFunction) gst_buffer_finalize;
-
}
static void
GST_CAT_LOG (GST_CAT_BUFFER, "finalize %p", buffer);
/* free our data */
- g_free (buffer->malloc_data);
+ if (G_LIKELY (buffer->malloc_data))
+ buffer->free_func (buffer->malloc_data);
gst_caps_replace (&GST_BUFFER_CAPS (buffer), NULL);
-#ifdef USE_POISONING
- memset (buffer, 0xff, sizeof (GstBuffer));
-#endif
+ if (buffer->parent)
+ gst_buffer_unref (buffer->parent);
+
+/* ((GstMiniObjectClass *) */
+/* gst_buffer_parent_class)->finalize (GST_MINI_OBJECT_CAST (buffer)); */
}
/**
g_return_if_fail (dest != NULL);
g_return_if_fail (src != NULL);
+ /* nothing to copy if the buffers are the same */
+ if (G_UNLIKELY (dest == src))
+ return;
+
+#if GST_VERSION_NANO == 1
+ /* we enable this extra debugging in git versions only for now */
+ g_warn_if_fail (gst_buffer_is_metadata_writable (dest));
+#endif
+
GST_CAT_LOG (GST_CAT_BUFFER, "copy %p to %p", src, dest);
if (flags & GST_BUFFER_COPY_FLAGS) {
/* copy relevant flags */
mask = GST_BUFFER_FLAG_PREROLL | GST_BUFFER_FLAG_IN_CAPS |
GST_BUFFER_FLAG_DELTA_UNIT | GST_BUFFER_FLAG_DISCONT |
- GST_BUFFER_FLAG_GAP;
+ GST_BUFFER_FLAG_GAP | GST_BUFFER_FLAG_MEDIA1 |
+ GST_BUFFER_FLAG_MEDIA2 | GST_BUFFER_FLAG_MEDIA3;
GST_MINI_OBJECT_FLAGS (dest) |= GST_MINI_OBJECT_FLAGS (src) & mask;
}
}
if (flags & GST_BUFFER_COPY_CAPS) {
- if (GST_BUFFER_CAPS (src))
- GST_BUFFER_CAPS (dest) = gst_caps_ref (GST_BUFFER_CAPS (src));
- else
- GST_BUFFER_CAPS (dest) = NULL;
+ gst_caps_replace (&GST_BUFFER_CAPS (dest), GST_BUFFER_CAPS (src));
}
}
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;
}
static void
-gst_buffer_init (GTypeInstance * instance, gpointer g_class)
+gst_buffer_init (GstBuffer * buffer)
{
- GstBuffer *buffer;
-
- buffer = (GstBuffer *) instance;
-
GST_CAT_LOG (GST_CAT_BUFFER, "init %p", buffer);
GST_BUFFER_TIMESTAMP (buffer) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (buffer) = GST_CLOCK_TIME_NONE;
GST_BUFFER_OFFSET (buffer) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_OFFSET_END (buffer) = GST_BUFFER_OFFSET_NONE;
+ GST_BUFFER_FREE_FUNC (buffer) = g_free;
}
/**
* 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.
*/
-/* FIXME can we make this threadsafe without a lock on the buffer?
- * We can use compare and swap and atomic reads. */
+/* this is not made atomic because if the buffer were reffed from multiple
+ * threads, it would have a refcount > 2 and thus be immutable.
+ */
GstCaps *
gst_buffer_get_caps (GstBuffer * buffer)
{
/**
* 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
* unreffed.
*/
-/* FIXME can we make this threadsafe without a lock on the buffer?
- * We can use compare and swap and atomic reads. Another idea is to
- * not attach the caps to the buffer but use an event to signal a caps
- * change. */
+/* this is not made atomic because if the buffer were reffed from multiple
+ * threads, it would have a refcount > 2 and thus be immutable.
+ */
void
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_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)
} else {
ret = gst_buffer_create_sub (buf, 0, GST_BUFFER_SIZE (buf));
- /* copy all the flags except IN_CAPS */
- GST_BUFFER_FLAGS (ret) = GST_BUFFER_FLAGS (buf);
- GST_BUFFER_FLAG_UNSET (ret, GST_BUFFER_FLAG_IN_CAPS);
- /* data should always be set to READONLY */
- GST_BUFFER_FLAG_SET (ret, GST_BUFFER_FLAG_READONLY);
-
gst_buffer_unref (buf);
}
return ret;
}
-typedef struct _GstSubBuffer GstSubBuffer;
-typedef struct _GstSubBufferClass GstSubBufferClass;
-
-#define GST_IS_SUBBUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), _gst_subbuffer_type))
-#define GST_SUBBUFFER_CAST(obj) ((GstSubBuffer *)(obj))
-
-struct _GstSubBuffer
-{
- GstBuffer buffer;
-
- GstBuffer *parent;
-};
-
-struct _GstSubBufferClass
-{
- GstBufferClass buffer_class;
-};
-
-static GstBufferClass *sub_parent_class;
-
-static void gst_subbuffer_init (GTypeInstance * instance, gpointer g_class);
-static void gst_subbuffer_class_init (gpointer g_class, gpointer class_data);
-static void gst_subbuffer_finalize (GstSubBuffer * buffer);
-
-static GType
-gst_subbuffer_get_type (void)
-{
- if (G_UNLIKELY (_gst_subbuffer_type == 0)) {
- static const GTypeInfo subbuffer_info = {
- sizeof (GstSubBufferClass),
- NULL,
- NULL,
- gst_subbuffer_class_init,
- NULL,
- NULL,
- sizeof (GstSubBuffer),
- 0,
- gst_subbuffer_init,
- NULL
- };
-
- _gst_subbuffer_type = g_type_register_static (GST_TYPE_BUFFER,
- "GstSubBuffer", &subbuffer_info, 0);
- }
- return _gst_subbuffer_type;
-}
-
-static void
-gst_subbuffer_class_init (gpointer g_class, gpointer class_data)
-{
- GstBufferClass *buffer_class = GST_BUFFER_CLASS (g_class);
-
- sub_parent_class = g_type_class_peek_parent (g_class);
-
- buffer_class->mini_object_class.finalize =
- (GstMiniObjectFinalizeFunction) gst_subbuffer_finalize;
-}
-
-static void
-gst_subbuffer_finalize (GstSubBuffer * buffer)
-{
- gst_buffer_unref (buffer->parent);
-
- GST_MINI_OBJECT_CLASS (sub_parent_class)->
- finalize (GST_MINI_OBJECT_CAST (buffer));
-}
-
-static void
-gst_subbuffer_init (GTypeInstance * instance, gpointer g_class)
-{
- GST_BUFFER_FLAG_SET (GST_BUFFER_CAST (instance), GST_BUFFER_FLAG_READONLY);
-}
+#define GST_IS_SUBBUFFER(obj) (GST_BUFFER_CAST(obj)->parent != NULL)
/**
* gst_buffer_create_sub:
* 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)
{
- GstSubBuffer *subbuffer;
+ GstBuffer *subbuffer;
GstBuffer *parent;
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 */
if (GST_IS_SUBBUFFER (buffer)) {
- parent = GST_SUBBUFFER_CAST (buffer)->parent;
+ parent = buffer->parent;
} else {
parent = buffer;
}
gst_buffer_ref (parent);
/* create the new buffer */
- subbuffer = (GstSubBuffer *) gst_mini_object_new (_gst_subbuffer_type);
+ subbuffer = gst_buffer_new ();
subbuffer->parent = parent;
+ GST_BUFFER_FLAG_SET (subbuffer, GST_BUFFER_FLAG_READONLY);
GST_CAT_LOG (GST_CAT_BUFFER, "new subbuffer %p (parent %p)", subbuffer,
parent);
/* set the right values in the child */
- GST_BUFFER_DATA (GST_BUFFER_CAST (subbuffer)) = buffer->data + offset;
- GST_BUFFER_SIZE (GST_BUFFER_CAST (subbuffer)) = size;
+ GST_BUFFER_DATA (subbuffer) = buffer->data + offset;
+ GST_BUFFER_SIZE (subbuffer) = size;
+
+ if ((offset == 0) && (size == GST_BUFFER_SIZE (buffer))) {
+ /* copy all the flags except IN_CAPS */
+ GST_BUFFER_FLAG_SET (subbuffer, GST_BUFFER_FLAGS (buffer));
+ GST_BUFFER_FLAG_UNSET (subbuffer, GST_BUFFER_FLAG_IN_CAPS);
+ } else {
+ /* copy only PREROLL & GAP flags */
+ GST_BUFFER_FLAG_SET (subbuffer, (GST_BUFFER_FLAGS (buffer) &
+ (GST_BUFFER_FLAG_PREROLL | GST_BUFFER_FLAG_GAP)));
+ }
/* we can copy the timestamp and offset if the new buffer starts at
* offset 0 */
GST_BUFFER_OFFSET_END (subbuffer) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_CAPS (subbuffer) = NULL;
}
- return GST_BUFFER_CAST (subbuffer);
+ return subbuffer;
}
/**
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_IS_SUBBUFFER (buf2) &&
- (GST_SUBBUFFER_CAST (buf1)->parent == GST_SUBBUFFER_CAST (buf2)->parent)
+ GST_IS_SUBBUFFER (buf2) && (buf1->parent == buf2->parent)
&& ((buf1->data + buf1->size) == buf2->data));
}
* 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 */
if (gst_buffer_is_span_fast (buf1, buf2)) {
- GstBuffer *parent = GST_SUBBUFFER_CAST (buf1)->parent;
+ GstBuffer *parent = buf1->parent;
/* we simply create a subbuffer of the common parent */
newbuf = gst_buffer_create_sub (parent,
projects / platform / upstream / gstreamer.git / blobdiff