gstreamer/gst/gstbuffer.override

611 lines
15 KiB
C

/* -*- Mode: C; ; c-file-style: "python" -*- */
/* gst-python
* Copyright (C) 2002 David I. Lehn
* Copyright (C) 2004 Johan Dahlin
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Johan Dahlin <johan@gnome.org>
*/
%%
headers
static Py_ssize_t gst_buffer_getreadbuffer (PyObject *self,
Py_ssize_t index, void **ptr);
static Py_ssize_t gst_buffer_getwritebuf (PyObject *self,
Py_ssize_t index, void **ptr);
static Py_ssize_t gst_buffer_getsegcount (PyObject *self,
Py_ssize_t *lenp);
#if PY_VERSION_HEX >= 0x02050000
static Py_ssize_t gst_buffer_getcharbuf (PyObject *self,
Py_ssize_t index, char **ptr);
#else
static Py_ssize_t gst_buffer_getcharbuf (PyObject *self,
Py_ssize_t index, const char **ptr);
#endif
%%
override gst_buffer_new kwargs
static int
_wrap_gst_buffer_new(PyGstMiniObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "data", "buffer_size", NULL };
char *data = NULL;
int size = 0;
int buf_size = -1;
GST_INFO("self:%p", self);
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|z#i:GstBuffer.__init__", kwlist,
&data, &size, &buf_size))
return -1;
if (size < 0) {
PyErr_SetString(PyExc_TypeError, "buffer size must be >= 0");
return -1;
}
if (buf_size < 0)
buf_size = size;
if (buf_size < size) {
PyErr_SetString(PyExc_TypeError, "buffer size must be >= data size");
return -1;
}
self->obj = GST_MINI_OBJECT(gst_buffer_new_and_alloc(buf_size));
GST_INFO ("pyo:%p pyr:%"G_GSSIZE_FORMAT" minio:%p minir:%d",
self, ((PyObject*)self)->ob_refcnt,
self->obj, GST_MINI_OBJECT_REFCOUNT_VALUE(self->obj));
if (!self->obj) {
PyErr_SetString(PyExc_RuntimeError, "could not create GstBuffer object");
return -1;
}
pygstminiobject_register_wrapper((PyObject *) self);
if (data == NULL)
return 0;
memcpy (GST_BUFFER_DATA (self->obj), data, size);
GST_BUFFER_SIZE (self->obj) = size;
return 0;
}
%%
override-slot GstBuffer.tp_str
static PyObject *
_wrap_gst_buffer_tp_str (PyGstMiniObject *self)
{
GstBuffer *buf;
g_assert (self);
buf = GST_BUFFER(pygstminiobject_get(self));
g_assert (buf);
return PyString_FromStringAndSize((const gchar*) GST_BUFFER_DATA(buf),
(gint) GST_BUFFER_SIZE(buf));
}
%%
override-slot GstBuffer.tp_repr
static PyObject *
_wrap_gst_buffer_tp_repr (PyGstMiniObject *self)
{
GstBuffer *buf;
guchar *data;
gchar *repr;
gint size = 0;
PyObject *ret;
g_assert (self);
buf = GST_BUFFER(self->obj);
g_assert (buf);
size = GST_BUFFER_SIZE (buf);
if (size == 0) {
repr = g_strdup_printf ("<gst.Buffer %p of size %d>", buf, size);
} else {
data = GST_BUFFER_DATA (buf);
repr = g_strdup_printf (
"<gst.Buffer %p of size %d and data 0x%02x%02x%02x%02x>", buf, size,
*data,
size > 0 ? *(data + 1) : 0,
size > 1 ? *(data + 2) : 0,
size > 2 ? *(data + 3) : 0
);
}
ret = PyString_FromStringAndSize(repr, strlen (repr));
g_free (repr);
return ret;
}
%%
override-slot GstBuffer.tp_as_buffer
static PyBufferProcs _wrap_gst_buffer_tp_as_buffer = {
gst_buffer_getreadbuffer, /* bf_getreadbuffer */
gst_buffer_getwritebuf, /* bf_getwritebuffer */
gst_buffer_getsegcount, /* bf_getsegcount */
gst_buffer_getcharbuf, /* bf_getcharbuffer */
};
static Py_ssize_t
gst_buffer_getreadbuffer(PyObject *self, Py_ssize_t index,
void **ptr)
{
GstBuffer *buf = GST_BUFFER(pygstminiobject_get(self));
if ( index != 0 ) {
PyErr_SetString(PyExc_SystemError,
"accessing non-existent GstBuffer segment");
return -1;
}
*ptr = GST_BUFFER_DATA(buf);
return GST_BUFFER_SIZE(buf);
}
static Py_ssize_t
gst_buffer_getsegcount(PyObject *self, Py_ssize_t *lenp)
{
GstBuffer *buf = GST_BUFFER(pygstminiobject_get(self));
if (lenp)
*lenp = GST_BUFFER_SIZE(buf);
return 1;
}
/* Need a version that has const char ** for Python 2.4 */
#if PY_VERSION_HEX >= 0x02050000
static Py_ssize_t gst_buffer_getcharbuf (PyObject *self,
Py_ssize_t index, char **ptr)
#else
static Py_ssize_t gst_buffer_getcharbuf (PyObject *self,
Py_ssize_t index, const char **ptr)
#endif
{
return gst_buffer_getreadbuffer (self, index, (void **) ptr);
}
static Py_ssize_t
gst_buffer_getwritebuf(PyObject *self, Py_ssize_t index, void **ptr)
{
GstBuffer *buf = GST_BUFFER(pygstminiobject_get(self));
if ( index != 0 ) {
PyErr_SetString(PyExc_SystemError,
"accessing non-existent GstBuffer segment");
return -1;
}
if (!gst_buffer_is_writable (buf)) {
PyErr_SetString(PyExc_TypeError,
"buffer is not writable");
return -1;
}
*ptr = GST_BUFFER_DATA(buf);
return GST_BUFFER_SIZE(buf);
}
%%
override-slot GstBuffer.tp_as_sequence
/* FIXME: should buffer parts be buffers or strings? */
static Py_ssize_t
pygst_buffer_length(PyObject *self)
{
return GST_BUFFER_SIZE(pygobject_get (self));
}
static PyObject *
pygst_buffer_slice(PyObject *self, Py_ssize_t start, Py_ssize_t end)
{
GstBuffer *buf = GST_BUFFER (pygobject_get (self));
if (start < 0)
start = 0;
if (end < 0)
end = 0;
if (end > GST_BUFFER_SIZE(buf))
end = GST_BUFFER_SIZE(buf);
if (end <= start) {
PyErr_SetString(PyExc_IndexError, "buffer index out of range");
return NULL;
}
return PyString_FromStringAndSize((gchar *) GST_BUFFER_DATA (buf) + start, end - start);
}
static PyObject *
pygst_buffer_item(PyObject *self, Py_ssize_t index)
{
return pygst_buffer_slice (self, index, index + 1);
}
static int
pygst_buffer_ass_slice (PyObject *self, Py_ssize_t start,
Py_ssize_t end, PyObject *val)
{
GstBuffer *buf = GST_BUFFER (pygobject_get (self));
const void *data;
Py_ssize_t len;
if (!gst_buffer_is_writable (buf)) {
PyErr_SetString(PyExc_TypeError, "buffer is not writable");
return -1;
}
/* FIXME: policy? */
if (start < 0 || end <= start || end > GST_BUFFER_SIZE (buf)) {
PyErr_SetString(PyExc_IndexError, "buffer index out of range");
return -1;
}
end -= start;
if (PyObject_AsReadBuffer(val, &data, &len))
return -1;
if (len > end)
len = end;
memcpy (GST_BUFFER_DATA (buf) + start, data, len);
return 0;
}
static int
pygst_buffer_ass_item (PyObject *self, Py_ssize_t index, PyObject *val)
{
GstBuffer *buf = GST_BUFFER (pygobject_get (self));
const void *data;
Py_ssize_t len;
if (!gst_buffer_is_writable (buf)) {
PyErr_SetString(PyExc_TypeError, "buffer is not writable");
return -1;
}
if (index < 0 || index > GST_BUFFER_SIZE (buf)) {
PyErr_SetString(PyExc_IndexError, "buffer index out of range");
return -1;
}
if (PyObject_AsReadBuffer(val, &data, &len))
return -1;
/* FIXME: how do we handle this? */
if (len > GST_BUFFER_SIZE (buf) - index)
len = GST_BUFFER_SIZE (buf) - index;
memcpy (GST_BUFFER_DATA (buf) + index, data, len);
return 0;
}
static PySequenceMethods _wrap_gst_buffer_tp_as_sequence = {
pygst_buffer_length, /* sq_length */
NULL, /* sq_concat */
NULL, /* sq_repeat */
pygst_buffer_item, /* sq_item */
pygst_buffer_slice, /* sq_slice */
pygst_buffer_ass_item, /* sq_ass_item */
pygst_buffer_ass_slice, /* sq_ass_slice */
NULL, /* sq_contains */
NULL, /* sq_inplace_concat */
NULL, /* sq_inplace_repeat */
};
%%
define GstBuffer.copy_on_write
static PyObject *
_wrap_gst_buffer_copy_on_write (PyObject *self)
{
GstBuffer *buf = GST_BUFFER(pygstminiobject_get(self));
GST_INFO("INCREF");
if (gst_buffer_is_writable (buf)) {
Py_INCREF (self);
return self;
}
buf = gst_buffer_copy (buf);
self = pygstminiobject_new ((GstMiniObject *)(buf));
gst_buffer_unref (buf);
return self;
}
%%
define GstBuffer.flag_is_set
static PyObject *
_wrap_gst_buffer_flag_is_set(PyObject *self, PyObject *args)
{
int flag;
PyObject *retval;
GstBuffer *buf;
if (!PyArg_ParseTuple(args, "i:GstBuffer.flag_is_set", &flag))
return NULL;
buf = GST_BUFFER(pygstminiobject_get(self));
g_assert(GST_IS_BUFFER(buf));
retval = GST_BUFFER_FLAG_IS_SET(buf, flag) ? Py_True : Py_False;
Py_INCREF(retval);
return retval;
}
%%
define GstBuffer.flag_set
static PyObject *
_wrap_gst_buffer_flag_set(PyObject *self, PyObject *args)
{
int flag;
GstBuffer *buf;
if (!PyArg_ParseTuple(args, "i:GstBuffer.set", &flag))
return NULL;
buf = GST_BUFFER(pygstminiobject_get(self));
g_assert(GST_IS_BUFFER(buf));
GST_BUFFER_FLAG_SET(buf, flag);
Py_INCREF(Py_None);
return Py_None;
}
%%
define GstBuffer.flag_unset
static PyObject *
_wrap_gst_buffer_flag_unset(PyObject *self, PyObject *args)
{
int flag;
GstBuffer *buf;
if (!PyArg_ParseTuple(args, "i:GstBuffer.unset", &flag))
return NULL;
buf = GST_BUFFER(pygstminiobject_get(self));
g_assert(GST_IS_BUFFER(buf));
GST_BUFFER_FLAG_UNSET(buf, flag);
Py_INCREF(Py_None);
return Py_None;
}
%%
override-attr GstBuffer.data
static PyObject *
_wrap_gst_buffer__get_data(PyObject *self, void *closure)
{
GstBuffer *buf;
g_assert (self);
buf = GST_BUFFER(pygstminiobject_get(self));
g_assert (buf);
return PyString_FromStringAndSize((const gchar*) GST_BUFFER_DATA(buf),
(gint) GST_BUFFER_SIZE(buf));
}
%%
override-attr GstBuffer.size
static PyObject *
_wrap_gst_buffer__get_size(PyObject *self, void *closure)
{
return PyLong_FromUnsignedLongLong((guint) GST_BUFFER_SIZE(GST_BUFFER(pygstminiobject_get(self))));
}
static int
_wrap_gst_buffer__set_size(PyGstMiniObject *self, PyObject *value, void *closure)
{
guint val;
GstBuffer *buf;
void* ptr;
if (PyInt_CheckExact(value))
val = PyInt_AsUnsignedLongLongMask(value);
else
val = PyLong_AsUnsignedLongLong(value);
if (PyErr_Occurred())
return -1;
g_assert (self);
buf = GST_BUFFER(pygstminiobject_get(self));
g_assert (buf);
ptr = realloc( GST_BUFFER_DATA(buf), val );
if (ptr)
{
GST_BUFFER_DATA(buf) = ptr;
GST_BUFFER_SIZE(buf) = val;
}
else
{
/* Raise an error */
PyErr_SetString( PyExc_RuntimeError, "Unable to realloc Buffer" );
}
return 0;
}
%%
override-attr GstBuffer.timestamp
static PyObject *
_wrap_gst_buffer__get_timestamp(PyObject *self, void *closure)
{
guint64 ret;
ret = GST_BUFFER(pygstminiobject_get(self))->timestamp;
return PyLong_FromUnsignedLongLong(ret);
}
static int
_wrap_gst_buffer__set_timestamp(PyGstMiniObject *self, PyObject *value, void *closure)
{
guint64 val;
if (PyInt_CheckExact(value))
val = PyInt_AsUnsignedLongLongMask(value);
else
val = PyLong_AsUnsignedLongLong(value);
if (PyErr_Occurred())
return -1;
GST_BUFFER(self->obj)->timestamp = val;
return 0;
}
%%
override-attr GstBuffer.duration
static PyObject *
_wrap_gst_buffer__get_duration(PyObject *self, void *closure)
{
guint64 ret;
ret = GST_BUFFER(pygstminiobject_get(self))->duration;
return PyLong_FromUnsignedLongLong(ret);
}
static int
_wrap_gst_buffer__set_duration(PyGstMiniObject *self, PyObject *value, void *closure)
{
guint64 val;
if (PyInt_CheckExact(value))
val = PyInt_AsUnsignedLongLongMask(value);
else
val = PyLong_AsUnsignedLongLong(value);
if (PyErr_Occurred())
return -1;
GST_BUFFER(self->obj)->duration = val;
return 0;
}
%%
override-attr GstBuffer.offset
static PyObject *
_wrap_gst_buffer__get_offset (PyObject *self, void *closure)
{
guint64 ret;
GstMiniObject *miniobject;
g_assert (self);
miniobject = pygstminiobject_get (self);
g_assert (miniobject);
ret = GST_BUFFER_OFFSET (GST_BUFFER (miniobject));
return PyLong_FromUnsignedLongLong (ret);
}
static int
_wrap_gst_buffer__set_offset (PyGstMiniObject *self, PyObject *value, void *closure)
{
guint64 val;
g_assert (self);
if (PyInt_CheckExact (value))
val = PyInt_AsUnsignedLongLongMask (value);
else
val = PyLong_AsUnsignedLongLong (value);
if (PyErr_Occurred())
return -1;
GST_BUFFER_OFFSET (GST_BUFFER (self->obj)) = val;
return 0;
}
%%
override-attr GstBuffer.offset_end
static PyObject *
_wrap_gst_buffer__get_offset_end (PyObject *self, void *closure)
{
guint64 ret;
GstMiniObject *miniobject;
g_assert (self);
miniobject = pygstminiobject_get (self);
g_assert (miniobject);
ret = GST_BUFFER_OFFSET_END (GST_BUFFER (miniobject));
return PyLong_FromUnsignedLongLong (ret);
}
static int
_wrap_gst_buffer__set_offset_end (PyGstMiniObject *self, PyObject *value, void *closure)
{
guint64 val;
g_assert (self);
if (PyInt_CheckExact (value))
val = PyInt_AsUnsignedLongLongMask (value);
else
val = PyLong_AsUnsignedLongLong (value);
if (PyErr_Occurred ())
return -1;
GST_BUFFER_OFFSET_END (GST_BUFFER (self->obj)) = val;
return 0;
}
%%
override gst_buffer_stamp kwargs
static PyObject *
_wrap_gst_buffer_stamp (PyGstMiniObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "src", NULL };
PyGstMiniObject *srcobj;
GstBuffer *dest, *src;
if (!PyArg_ParseTupleAndKeywords (args, kwargs,
"O:GstBuffer.stamp",
kwlist, &srcobj))
return NULL;
dest = GST_BUFFER(pygstminiobject_get(self));
src = GST_BUFFER(pygstminiobject_get(srcobj));
gst_buffer_stamp (dest, (const GstBuffer*) src);
Py_INCREF(Py_None);
return Py_None;
}
%%
override-attr GstBuffer.caps
static PyObject *
_wrap_gst_buffer__get_caps (PyObject *self, void *closure)
{
GstMiniObject *miniobject;
GstCaps *ret;
miniobject = pygstminiobject_get (self);
g_assert (miniobject);
pyg_begin_allow_threads;
ret = gst_buffer_get_caps(GST_BUFFER(miniobject));
pyg_end_allow_threads;
return pyg_boxed_new (GST_TYPE_CAPS, ret, FALSE, TRUE);
}
static int
_wrap_gst_buffer__set_caps (PyGstMiniObject *self, PyObject *value, void *closure)
{
GstCaps *caps;
g_assert (self);
caps = pygst_caps_from_pyobject (value, NULL);
if (PyErr_Occurred())
return -1;
pyg_begin_allow_threads;
gst_buffer_set_caps(GST_BUFFER(self->obj), caps);
gst_caps_unref (caps);
pyg_end_allow_threads;
return 0;
}
%%
override gst_buffer_set_caps kwargs
static PyObject *
_wrap_gst_buffer_set_caps(PyGstMiniObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "caps", NULL };
PyObject *py_caps;
GstCaps *caps;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O:GstBuffer.set_caps", kwlist, &py_caps))
return NULL;
caps = pygst_caps_from_pyobject (py_caps, NULL);
if (PyErr_Occurred())
return NULL;
pyg_begin_allow_threads;
gst_buffer_set_caps(GST_BUFFER(self->obj), caps);
gst_caps_unref (caps);
pyg_end_allow_threads;
Py_INCREF(Py_None);
return Py_None;
}