*
* 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.
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstbasetransform
+ * @title: GstBaseTransform
* @short_description: Base class for simple transform filters
* @see_also: #GstBaseSrc, #GstBaseSink
*
- * This base class is for filter elements that process data.
+ * This base class is for filter elements that process data. Elements
+ * that are suitable for implementation using #GstBaseTransform are ones
+ * where the size and caps of the output is known entirely from the input
+ * caps and buffer sizes. These include elements that directly transform
+ * one buffer into another, modify the contents of a buffer in-place, as
+ * well as elements that collate multiple input buffers into one output buffer,
+ * or that expand one input buffer into multiple output buffers. See below
+ * for more concrete use cases.
*
* It provides for:
- * <itemizedlist>
- * <listitem><para>one sinkpad and one srcpad</para></listitem>
- * <listitem><para>
- * Possible formats on sink and source pad implemented
- * with custom transform_caps function. By default uses
- * same format on sink and source.
- * </para></listitem>
- * <listitem><para>Handles state changes</para></listitem>
- * <listitem><para>Does flushing</para></listitem>
- * <listitem><para>Push mode</para></listitem>
- * <listitem><para>
- * Pull mode if the sub-class transform can operate on arbitrary data
- * </para></listitem>
- * </itemizedlist>
- *
- * <refsect2>
- * <title>Use Cases</title>
- * <para>
- * <orderedlist>
- * <listitem>
- * <itemizedlist><title>Passthrough mode</title>
- * <listitem><para>
- * Element has no interest in modifying the buffer. It may want to inspect it,
+ *
+ * * one sinkpad and one srcpad
+ * * Possible formats on sink and source pad implemented
+ * with custom transform_caps function. By default uses
+ * same format on sink and source.
+ *
+ * * Handles state changes
+ * * Does flushing
+ * * Push mode
+ * * Pull mode if the sub-class transform can operate on arbitrary data
+ *
+ * # Use Cases
+ *
+ * ## Passthrough mode
+ *
+ * * Element has no interest in modifying the buffer. It may want to inspect it,
* in which case the element should have a transform_ip function. If there
* is no transform_ip function in passthrough mode, the buffer is pushed
* intact.
- * </para></listitem>
- * <listitem><para>
- * On the GstBaseTransformClass is the passthrough_on_same_caps variable
- * which will automatically set/unset passthrough based on whether the
+ *
+ * * The #GstBaseTransformClass.passthrough_on_same_caps variable
+ * will automatically set/unset passthrough based on whether the
* element negotiates the same caps on both pads.
- * </para></listitem>
- * <listitem><para>
- * passthrough_on_same_caps on an element that doesn't implement a
- * transform_caps function is useful for elements that only inspect data
- * (such as level)
- * </para></listitem>
- * </itemizedlist>
- * <itemizedlist>
- * <title>Example elements</title>
- * <listitem>Level</listitem>
- * <listitem>Videoscale, audioconvert, ffmpegcolorspace, audioresample in
- * certain modes.</listitem>
- * </itemizedlist>
- * </listitem>
- * <listitem>
- * <itemizedlist>
- * <title>Modifications in-place - input buffer and output buffer are the
- * same thing.</title>
- * <listitem><para>
- * The element must implement a transform_ip function.
- * </para></listitem>
- * <listitem><para>
- * Output buffer size must <= input buffer size
- * </para></listitem>
- * <listitem><para>
- * If the always_in_place flag is set, non-writable buffers will be copied
- * and passed to the transform_ip function, otherwise a new buffer will be
- * created and the transform function called.
- * </para></listitem>
- * <listitem><para>
- * Incoming writable buffers will be passed to the transform_ip function
- * immediately. </para></listitem>
- * <listitem><para>
- * only implementing transform_ip and not transform implies always_in_place
- * = TRUE
- * </para></listitem>
- * </itemizedlist>
- * <itemizedlist>
- * <title>Example elements</title>
- * <listitem>Volume</listitem>
- * <listitem>Audioconvert in certain modes (signed/unsigned
- * conversion)</listitem>
- * <listitem>ffmpegcolorspace in certain modes (endianness
- * swapping)</listitem>
- * </itemizedlist>
- * </listitem>
- * <listitem>
- * <itemizedlist>
- * <title>Modifications only to the caps/metadata of a buffer</title>
- * <listitem><para>
- * The element does not require writable data, but non-writable buffers
- * should be subbuffered so that the meta-information can be replaced.
- * </para></listitem>
- * <listitem><para>
- * Elements wishing to operate in this mode should replace the
- * prepare_output_buffer method to create subbuffers of the input buffer
- * and set always_in_place to TRUE
- * </para></listitem>
- * </itemizedlist>
- * <itemizedlist>
- * <title>Example elements</title>
- * <listitem>Capsfilter when setting caps on outgoing buffers that have
- * none.</listitem>
- * <listitem>identity when it is going to re-timestamp buffers by
- * datarate.</listitem>
- * </itemizedlist>
- * </listitem>
- * <listitem>
- * <itemizedlist><title>Normal mode</title>
- * <listitem><para>
- * always_in_place flag is not set, or there is no transform_ip function
- * </para></listitem>
- * <listitem><para>
- * Element will receive an input buffer and output buffer to operate on.
- * </para></listitem>
- * <listitem><para>
- * Output buffer is allocated by calling the prepare_output_buffer function.
- * </para></listitem>
- * </itemizedlist>
- * <itemizedlist>
- * <title>Example elements</title>
- * <listitem>Videoscale, ffmpegcolorspace, audioconvert when doing
- * scaling/conversions</listitem>
- * </itemizedlist>
- * </listitem>
- * <listitem>
- * <itemizedlist><title>Special output buffer allocations</title>
- * <listitem><para>
- * Elements which need to do special allocation of their output buffers
- * other than what gst_buffer_pad_alloc allows should implement a
- * prepare_output_buffer method, which calls the parent implementation and
- * passes the newly allocated buffer.
- * </para></listitem>
- * </itemizedlist>
- * <itemizedlist>
- * <title>Example elements</title>
- * <listitem>efence</listitem>
- * </itemizedlist>
- * </listitem>
- * </orderedlist>
- * </para>
- * </refsect2>
- * <refsect2>
- * <title>Sub-class settable flags on GstBaseTransform</title>
- * <para>
- * <itemizedlist>
- * <listitem><para>
- * <itemizedlist><title>passthrough</title>
- * <listitem><para>
- * Implies that in the current configuration, the sub-class is not
- * interested in modifying the buffers.
- * </para></listitem>
- * <listitem><para>
- * Elements which are always in passthrough mode whenever the same caps
- * has been negotiated on both pads can set the class variable
- * passthrough_on_same_caps to have this behaviour automatically.
- * </para></listitem>
- * </itemizedlist>
- * </para></listitem>
- * <listitem><para>
- * <itemizedlist><title>always_in_place</title>
- * <listitem><para>
- * Determines whether a non-writable buffer will be copied before passing
- * to the transform_ip function.
- * </para></listitem>
- * <listitem><para>
- * Implied TRUE if no transform function is implemented.
- * </para></listitem>
- * <listitem><para>
- * Implied FALSE if ONLY transform function is implemented.
- * </para></listitem>
- * </itemizedlist>
- * </para></listitem>
- * </itemizedlist>
- * </para>
- * </refsect2>
+ *
+ * * #GstBaseTransformClass.passthrough_on_same_caps on an element that
+ * doesn't implement a transform_caps function is useful for elements that
+ * only inspect data (such as level)
+ *
+ * * Example elements
+ *
+ * * Level
+ * * Videoscale, audioconvert, videoconvert, audioresample in certain modes.
+ *
+ * ## Modifications in-place - input buffer and output buffer are the same thing.
+ *
+ * * The element must implement a transform_ip function.
+ * * Output buffer size must <= input buffer size
+ * * If the always_in_place flag is set, non-writable buffers will be copied
+ * and passed to the transform_ip function, otherwise a new buffer will be
+ * created and the transform function called.
+ *
+ * * Incoming writable buffers will be passed to the transform_ip function
+ * immediately.
+ * * only implementing transform_ip and not transform implies always_in_place = %TRUE
+ *
+ * * Example elements:
+ * * Volume
+ * * Audioconvert in certain modes (signed/unsigned conversion)
+ * * videoconvert in certain modes (endianness swapping)
+ *
+ * ## Modifications only to the caps/metadata of a buffer
+ *
+ * * The element does not require writable data, but non-writable buffers
+ * should be subbuffered so that the meta-information can be replaced.
+ *
+ * * Elements wishing to operate in this mode should replace the
+ * prepare_output_buffer method to create subbuffers of the input buffer
+ * and set always_in_place to %TRUE
+ *
+ * * Example elements
+ * * Capsfilter when setting caps on outgoing buffers that have
+ * none.
+ * * identity when it is going to re-timestamp buffers by
+ * datarate.
+ *
+ * ## Normal mode
+ * * always_in_place flag is not set, or there is no transform_ip function
+ * * Element will receive an input buffer and output buffer to operate on.
+ * * Output buffer is allocated by calling the prepare_output_buffer function.
+ * * Example elements:
+ * * Videoscale, videoconvert, audioconvert when doing
+ * scaling/conversions
+ *
+ * ## Special output buffer allocations
+ * * Elements which need to do special allocation of their output buffers
+ * beyond allocating output buffers via the negotiated allocator or
+ * buffer pool should implement the prepare_output_buffer method.
+ *
+ * * Example elements:
+ * * efence
+ *
+ * # Sub-class settable flags on GstBaseTransform
+ *
+ * * passthrough
+ *
+ * * Implies that in the current configuration, the sub-class is not interested in modifying the buffers.
+ * * Elements which are always in passthrough mode whenever the same caps has been negotiated on both pads can set the class variable passthrough_on_same_caps to have this behaviour automatically.
+ *
+ * * always_in_place
+ * * Determines whether a non-writable buffer will be copied before passing
+ * to the transform_ip function.
+ *
+ * * Implied %TRUE if no transform function is implemented.
+ * * Implied %FALSE if ONLY transform function is implemented.
*/
#ifdef HAVE_CONFIG_H
PROP_QOS
};
-#define GST_BASE_TRANSFORM_GET_PRIVATE(obj) \
- (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_TRANSFORM, GstBaseTransformPrivate))
-
struct _GstBaseTransformPrivate
{
/* Set by sub-class */
GstPadMode pad_mode;
gboolean gap_aware;
+ gboolean prefer_passthrough;
/* QoS stats */
guint64 processed;
static GstElementClass *parent_class = NULL;
+static gint private_offset = 0;
static void gst_base_transform_class_init (GstBaseTransformClass * klass);
static void gst_base_transform_init (GstBaseTransform * trans,
GstBaseTransformClass * klass);
+static GstFlowReturn default_submit_input_buffer (GstBaseTransform * trans,
+ gboolean is_discont, GstBuffer * input);
+static GstFlowReturn default_generate_output (GstBaseTransform * trans,
+ GstBuffer ** outbuf);
/* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
* method to get to the padtemplates */
_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstBaseTransform", &base_transform_info, G_TYPE_FLAG_ABSTRACT);
+
+ private_offset =
+ g_type_add_instance_private (_type, sizeof (GstBaseTransformPrivate));
+
g_once_init_leave (&base_transform_type, _type);
}
return base_transform_type;
}
+static inline GstBaseTransformPrivate *
+gst_base_transform_get_instance_private (GstBaseTransform * self)
+{
+ return (G_STRUCT_MEMBER_P (self, private_offset));
+}
+
static void gst_base_transform_finalize (GObject * object);
static void gst_base_transform_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
GstBuffer * inbuf, GstBuffer ** outbuf);
static gboolean default_copy_metadata (GstBaseTransform * trans,
GstBuffer * inbuf, GstBuffer * outbuf);
+static gboolean
+gst_base_transform_default_transform_meta (GstBaseTransform * trans,
+ GstBuffer * inbuf, GstMeta * meta, GstBuffer * outbuf);
/* static guint gst_base_transform_signals[LAST_SIGNAL] = { 0 }; */
gobject_class = G_OBJECT_CLASS (klass);
+ if (private_offset != 0)
+ g_type_class_adjust_private_offset (klass, &private_offset);
+
GST_DEBUG_CATEGORY_INIT (gst_base_transform_debug, "basetransform", 0,
"basetransform element");
GST_DEBUG ("gst_base_transform_class_init");
- g_type_class_add_private (klass, sizeof (GstBaseTransformPrivate));
-
parent_class = g_type_class_peek_parent (klass);
gobject_class->set_property = gst_base_transform_set_property;
GST_DEBUG_FUNCPTR (gst_base_transform_default_propose_allocation);
klass->transform_size =
GST_DEBUG_FUNCPTR (gst_base_transform_default_transform_size);
+ klass->transform_meta =
+ GST_DEBUG_FUNCPTR (gst_base_transform_default_transform_meta);
klass->sink_event = GST_DEBUG_FUNCPTR (gst_base_transform_sink_eventfunc);
klass->src_event = GST_DEBUG_FUNCPTR (gst_base_transform_src_eventfunc);
klass->prepare_output_buffer =
GST_DEBUG_FUNCPTR (default_prepare_output_buffer);
klass->copy_metadata = GST_DEBUG_FUNCPTR (default_copy_metadata);
+ klass->submit_input_buffer = GST_DEBUG_FUNCPTR (default_submit_input_buffer);
+ klass->generate_output = GST_DEBUG_FUNCPTR (default_generate_output);
}
static void
GST_DEBUG ("gst_base_transform_init");
- priv = trans->priv = GST_BASE_TRANSFORM_GET_PRIVATE (trans);
+ priv = trans->priv = gst_base_transform_get_instance_private (trans);
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
priv->cache_caps2 = NULL;
priv->pad_mode = GST_PAD_MODE_NONE;
priv->gap_aware = FALSE;
+ priv->prefer_passthrough = TRUE;
priv->passthrough = FALSE;
if (bclass->transform == NULL) {
ret = klass->transform_caps (trans, direction, caps, filter);
GST_LOG_OBJECT (trans, " to: %" GST_PTR_FORMAT, ret);
-#ifndef G_DISABLE_ASSERT
+#ifdef GST_ENABLE_EXTRA_CHECKS
if (filter) {
if (!gst_caps_is_subset (ret, filter)) {
GstCaps *intersection;
}
static gboolean
+gst_base_transform_default_transform_meta (GstBaseTransform * trans,
+ GstBuffer * inbuf, GstMeta * meta, GstBuffer * outbuf)
+{
+ const GstMetaInfo *info = meta->info;
+ const gchar *const *tags;
+
+ tags = gst_meta_api_type_get_tags (info->api);
+
+ if (!tags)
+ return TRUE;
+
+ return FALSE;
+}
+
+static gboolean
gst_base_transform_default_transform_size (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, gsize size,
GstCaps * othercaps, gsize * othersize)
/* get the caps that can be handled by @pad. We perform:
*
* - take the caps of peer of otherpad,
- * - filter against the padtemplate of otherpad,
+ * - filter against the padtemplate of otherpad,
* - calculate all transforms of remaining caps
* - filter against template of @pad
*
GstCaps * filter)
{
GstPad *otherpad;
- GstCaps *peercaps, *caps, *temp, *peerfilter = NULL;
+ GstCaps *peercaps = NULL, *caps, *temp, *peerfilter = NULL;
GstCaps *templ, *otempl;
otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
templ = gst_pad_get_pad_template_caps (pad);
otempl = gst_pad_get_pad_template_caps (otherpad);
- /* we can do what the peer can */
+ /* first prepare the filter to be send onwards. We need to filter and
+ * transform it to valid caps for the otherpad. */
if (filter) {
GST_DEBUG_OBJECT (pad, "filter caps %" GST_PTR_FORMAT, filter);
- /* filtered against our padtemplate on the other side */
+ /* filtered against our padtemplate of this pad */
GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, templ);
temp = gst_caps_intersect_full (filter, templ, GST_CAPS_INTERSECT_FIRST);
GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
GST_DEBUG_OBJECT (pad, "transformed %" GST_PTR_FORMAT, peerfilter);
gst_caps_unref (temp);
- /* and filter against the template of this pad */
- GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, otempl);
- /* We keep the caps sorted like the returned caps */
- temp =
- gst_caps_intersect_full (peerfilter, otempl, GST_CAPS_INTERSECT_FIRST);
- GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
- gst_caps_unref (peerfilter);
- peerfilter = temp;
+ if (peerfilter && !gst_caps_is_empty (peerfilter)) {
+ /* and filter against the template of the other pad */
+ GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, otempl);
+ /* We keep the caps sorted like the returned caps */
+ temp =
+ gst_caps_intersect_full (peerfilter, otempl,
+ GST_CAPS_INTERSECT_FIRST);
+ GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
+ gst_caps_unref (peerfilter);
+ peerfilter = temp;
+ }
+ }
+
+ GST_DEBUG_OBJECT (pad, "peer filter caps %" GST_PTR_FORMAT, peerfilter);
+
+ if (peerfilter && gst_caps_is_empty (peerfilter)) {
+ GST_DEBUG_OBJECT (pad, "peer filter caps are empty");
+ caps = peerfilter;
+ peerfilter = NULL;
+ goto done;
}
+ /* query the peer with the transformed filter */
peercaps = gst_pad_peer_query_caps (otherpad, peerfilter);
if (peerfilter)
GST_PAD_DIRECTION (otherpad), temp, filter);
GST_DEBUG_OBJECT (pad, "transformed %" GST_PTR_FORMAT, caps);
gst_caps_unref (temp);
- if (caps == NULL)
+ if (caps == NULL || gst_caps_is_empty (caps))
goto done;
if (peercaps) {
gst_caps_unref (caps);
caps = temp;
- /* Now try if we can put the untransformed downstream caps first */
- temp = gst_caps_intersect_full (peercaps, caps, GST_CAPS_INTERSECT_FIRST);
- if (!gst_caps_is_empty (temp)) {
- caps = gst_caps_merge (temp, caps);
- } else {
- gst_caps_unref (temp);
+ if (trans->priv->prefer_passthrough) {
+ /* Now try if we can put the untransformed downstream caps first */
+ temp = gst_caps_intersect_full (peercaps, caps, GST_CAPS_INTERSECT_FIRST);
+ if (!gst_caps_is_empty (temp)) {
+ caps = gst_caps_merge (temp, caps);
+ } else {
+ gst_caps_unref (temp);
+ }
}
} else {
gst_caps_unref (caps);
gst_query_unref (oldquery);
}
return TRUE;
-
}
static gboolean
/* by default we remove all metadata, subclasses should implement a
* filter_meta function */
- if (gst_meta_api_type_has_tag (api, GST_META_TAG_MEMORY)) {
+ if (gst_meta_api_type_has_tag (api, _gst_meta_tag_memory)) {
/* remove all memory dependent metadata because we are going to have to
* allocate different memory for input and output. */
GST_LOG_OBJECT (trans, "removing memory specific metadata %s",
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, outcaps, size, min, max);
gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
- gst_buffer_pool_set_config (pool, config);
+
+ /* buffer pool may have to do some changes */
+ if (!gst_buffer_pool_set_config (pool, config)) {
+ config = gst_buffer_pool_get_config (pool);
+
+ /* If change are not acceptable, fallback to generic pool */
+ if (!gst_buffer_pool_config_validate_params (config, outcaps, size, min,
+ max)) {
+ GST_DEBUG_OBJECT (trans, "unsupported pool, making new pool");
+
+ gst_object_unref (pool);
+ pool = gst_buffer_pool_new ();
+ gst_buffer_pool_config_set_params (config, outcaps, size, min, max);
+ gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
+ }
+
+ if (!gst_buffer_pool_set_config (pool, config))
+ goto config_failed;
+ }
}
if (update_allocator)
}
return TRUE;
+
+config_failed:
+ if (pool)
+ gst_object_unref (pool);
+
+ GST_ELEMENT_ERROR (trans, RESOURCE, SETTINGS,
+ ("Failed to configure the buffer pool"),
+ ("Configuration is most likely invalid, please report this issue."));
+ return FALSE;
}
static gboolean
if (!result)
goto no_decide_allocation;
+ /* check again in case the sub-class have switch to passthrough/in-place
+ * after looking at the meta APIs */
+ if (priv->passthrough || priv->always_in_place) {
+ GST_DEBUG_OBJECT (trans, "no doing passthrough, delay bufferpool");
+ gst_base_transform_set_allocation (trans, NULL, NULL, NULL, NULL);
+ gst_query_unref (query);
+ return TRUE;
+ }
+
/* we got configuration from our peer or the decide_allocation method,
* parse them */
if (gst_query_get_n_allocation_params (query) > 0) {
/* The caps we can actually output is the intersection of the transformed
* caps with the pad template for the pad */
- if (othercaps) {
+ if (othercaps && !gst_caps_is_empty (othercaps)) {
GstCaps *intersect, *templ_caps;
templ_caps = gst_pad_get_pad_template_caps (otherpad);
gst_base_transform_acceptcaps_default (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps)
{
-#if 0
- GstPad *otherpad;
- GstCaps *othercaps = NULL;
-#endif
+ GstPad *pad, *otherpad;
+ GstCaps *templ, *otempl, *ocaps = NULL;
gboolean ret = TRUE;
-#if 0
- otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
-
- /* we need fixed caps for the check, fall back to the default implementation
- * if we don't */
- if (!gst_caps_is_fixed (caps))
-#endif
- {
- GstCaps *allowed;
+ pad =
+ (direction ==
+ GST_PAD_SINK) ? GST_BASE_TRANSFORM_SINK_PAD (trans) :
+ GST_BASE_TRANSFORM_SRC_PAD (trans);
+ otherpad =
+ (direction ==
+ GST_PAD_SINK) ? GST_BASE_TRANSFORM_SRC_PAD (trans) :
+ GST_BASE_TRANSFORM_SINK_PAD (trans);
- GST_DEBUG_OBJECT (trans, "accept caps %" GST_PTR_FORMAT, caps);
+ GST_DEBUG_OBJECT (trans, "accept caps %" GST_PTR_FORMAT, caps);
- /* get all the formats we can handle on this pad */
- if (direction == GST_PAD_SRC)
- allowed = gst_pad_query_caps (trans->srcpad, NULL);
- else
- allowed = gst_pad_query_caps (trans->sinkpad, NULL);
-
- if (!allowed) {
- GST_DEBUG_OBJECT (trans, "gst_pad_query_caps() failed");
- goto no_transform_possible;
- }
-
- GST_DEBUG_OBJECT (trans, "allowed caps %" GST_PTR_FORMAT, allowed);
-
- /* intersect with the requested format */
- ret = gst_caps_is_subset (caps, allowed);
- gst_caps_unref (allowed);
-
- if (!ret)
- goto no_transform_possible;
- }
-#if 0
- else {
- GST_DEBUG_OBJECT (pad, "accept caps %" GST_PTR_FORMAT, caps);
+ templ = gst_pad_get_pad_template_caps (pad);
+ otempl = gst_pad_get_pad_template_caps (otherpad);
- /* find best possible caps for the other pad as a way to see if we can
- * transform this caps. */
- othercaps = gst_base_transform_find_transform (trans, pad, caps, FALSE);
- if (!othercaps || gst_caps_is_empty (othercaps))
- goto no_transform_possible;
+ /* get all the formats we can handle on this pad */
+ GST_DEBUG_OBJECT (trans, "intersect with pad template: %" GST_PTR_FORMAT,
+ templ);
+ if (!gst_caps_can_intersect (caps, templ))
+ goto reject_caps;
- GST_DEBUG_OBJECT (pad, "we can transform to %" GST_PTR_FORMAT, othercaps);
- }
-#endif
+ GST_DEBUG_OBJECT (trans, "trying to transform with filter: %"
+ GST_PTR_FORMAT " (the other pad template)", otempl);
+ ocaps = gst_base_transform_transform_caps (trans, direction, caps, otempl);
+ if (!ocaps || gst_caps_is_empty (ocaps))
+ goto no_transform_possible;
done:
-#if 0
- /* We know it's always NULL since we never use it */
- if (othercaps)
- gst_caps_unref (othercaps);
-#endif
-
+ GST_DEBUG_OBJECT (trans, "accept-caps result: %d", ret);
+ if (ocaps)
+ gst_caps_unref (ocaps);
+ gst_caps_unref (templ);
+ gst_caps_unref (otempl);
return ret;
/* ERRORS */
+reject_caps:
+ {
+ GST_DEBUG_OBJECT (trans, "caps can't intersect with the template");
+ ret = FALSE;
+ goto done;
+ }
no_transform_possible:
{
GST_DEBUG_OBJECT (trans,
GstCaps * incaps)
{
GstBaseTransformPrivate *priv = trans->priv;
- GstCaps *outcaps;
+ GstCaps *outcaps, *prev_incaps = NULL, *prev_outcaps = NULL;
gboolean ret = TRUE;
GST_DEBUG_OBJECT (pad, "have new caps %p %" GST_PTR_FORMAT, incaps, incaps);
outcaps = gst_caps_ref (incaps);
}
- /* call configure now */
- if (!(ret = gst_base_transform_configure_caps (trans, incaps, outcaps)))
- goto failed_configure;
+ prev_incaps = gst_pad_get_current_caps (trans->sinkpad);
+ prev_outcaps = gst_pad_get_current_caps (trans->srcpad);
+ if (prev_incaps && prev_outcaps && gst_caps_is_equal (prev_incaps, incaps)
+ && gst_caps_is_equal (prev_outcaps, outcaps)) {
+ GST_DEBUG_OBJECT (trans,
+ "New caps equal to old ones: %" GST_PTR_FORMAT " -> %" GST_PTR_FORMAT,
+ incaps, outcaps);
+ ret = TRUE;
+ } else {
+ /* call configure now */
+ if (!(ret = gst_base_transform_configure_caps (trans, incaps, outcaps)))
+ goto failed_configure;
- /* let downstream know about our caps */
- ret = gst_pad_set_caps (trans->srcpad, outcaps);
+ if (!prev_outcaps || !gst_caps_is_equal (outcaps, prev_outcaps))
+ /* let downstream know about our caps */
+ ret = gst_pad_set_caps (trans->srcpad, outcaps);
+ }
if (ret) {
/* try to get a pool when needed */
done:
if (outcaps)
gst_caps_unref (outcaps);
+ if (prev_incaps)
+ gst_caps_unref (prev_incaps);
+ if (prev_outcaps)
+ gst_caps_unref (prev_outcaps);
GST_OBJECT_LOCK (trans);
priv->negotiated = ret;
}
static gboolean
+gst_base_transform_reconfigure (GstBaseTransform * trans)
+{
+ gboolean reconfigure, ret = TRUE;
+
+ reconfigure = gst_pad_check_reconfigure (trans->srcpad);
+
+ if (G_UNLIKELY (reconfigure)) {
+ GstCaps *incaps;
+
+ GST_DEBUG_OBJECT (trans, "we had a pending reconfigure");
+
+ incaps = gst_pad_get_current_caps (trans->sinkpad);
+ if (incaps == NULL)
+ goto done;
+
+ /* if we need to reconfigure we pretend new caps arrived. This
+ * will reconfigure the transform with the new output format. */
+ if (!gst_base_transform_setcaps (trans, trans->sinkpad, incaps)) {
+ GST_ELEMENT_WARNING (trans, STREAM, FORMAT,
+ ("not negotiated"), ("not negotiated"));
+ ret = FALSE;
+ }
+
+ gst_caps_unref (incaps);
+ }
+
+done:
+
+ if (!ret)
+ gst_pad_mark_reconfigure (trans->srcpad);
+
+ return ret;
+}
+
+static gboolean
gst_base_transform_default_query (GstBaseTransform * trans,
GstPadDirection direction, GstQuery * query)
{
case GST_QUERY_ALLOCATION:
{
GstQuery *decide_query = NULL;
- gboolean negotiated;
/* can only be done on the sinkpad */
if (direction != GST_PAD_SINK)
goto done;
+ ret = gst_base_transform_reconfigure (trans);
+ if (G_UNLIKELY (!ret))
+ goto done;
+
GST_OBJECT_LOCK (trans);
- if (G_UNLIKELY (!(negotiated = priv->negotiated))) {
+ if (!priv->negotiated && !priv->passthrough && (klass->set_caps != NULL)) {
GST_DEBUG_OBJECT (trans,
- "not negotiated yet, can't answer ALLOCATION query");
+ "not negotiated yet but need negotiation, can't answer ALLOCATION query");
GST_OBJECT_UNLOCK (trans);
goto done;
}
- if ((decide_query = trans->priv->query))
- gst_query_ref (decide_query);
+
+ decide_query = trans->priv->query;
+ trans->priv->query = NULL;
GST_OBJECT_UNLOCK (trans);
GST_DEBUG_OBJECT (trans,
else
ret = FALSE;
- if (decide_query)
- gst_query_unref (decide_query);
+ if (decide_query) {
+ GST_OBJECT_LOCK (trans);
+
+ if (trans->priv->query == NULL)
+ trans->priv->query = decide_query;
+ else
+ gst_query_unref (decide_query);
+
+ GST_OBJECT_UNLOCK (trans);
+ }
GST_DEBUG_OBJECT (trans, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret,
query);
GstBaseTransformClass *bclass;
gboolean ret = FALSE;
- trans = GST_BASE_TRANSFORM (parent);
+ trans = GST_BASE_TRANSFORM_CAST (parent);
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (bclass->query)
GstBuffer * inbuf, GstBuffer ** outbuf)
{
GstBaseTransformPrivate *priv;
- GstFlowReturn ret = GST_FLOW_OK;
+ GstFlowReturn ret;
GstBaseTransformClass *bclass;
GstCaps *incaps, *outcaps;
gsize insize, outsize;
/* figure out how to allocate an output buffer */
if (priv->passthrough) {
- /* passthrough, we will not modify the incomming buffer so we can just
+ /* passthrough, we will not modify the incoming buffer so we can just
* reuse it */
GST_DEBUG_OBJECT (trans, "passthrough: reusing input buffer");
*outbuf = inbuf;
}
GST_DEBUG_OBJECT (trans, "using pool alloc");
ret = gst_buffer_pool_acquire_buffer (priv->pool, outbuf, NULL);
+ if (ret != GST_FLOW_OK)
+ goto alloc_failed;
+
goto copy_meta;
}
incaps = gst_pad_get_current_caps (trans->sinkpad);
outcaps = gst_pad_get_current_caps (trans->srcpad);
+ /* srcpad might be flushing already if we're being shut down */
+ if (outcaps == NULL)
+ goto no_outcaps;
+
GST_DEBUG_OBJECT (trans, "getting output size for alloc");
/* copy transform, figure out the output size */
insize = gst_buffer_get_size (inbuf);
GST_DEBUG_OBJECT (trans, "doing alloc of size %" G_GSIZE_FORMAT, outsize);
*outbuf = gst_buffer_new_allocate (priv->allocator, outsize, &priv->params);
+ if (!*outbuf) {
+ ret = GST_FLOW_ERROR;
+ goto alloc_failed;
+ }
copy_meta:
/* copy the metadata */
}
done:
- return ret;
+ return GST_FLOW_OK;
/* ERRORS */
- /* ERRORS */
activate_failed:
{
GST_ELEMENT_ERROR (trans, RESOURCE, SETTINGS,
GST_ERROR_OBJECT (trans, "unknown output size");
return GST_FLOW_ERROR;
}
+alloc_failed:
+ {
+ GST_DEBUG_OBJECT (trans, "could not allocate buffer from pool");
+ return ret;
+ }
+no_outcaps:
+ {
+ GST_DEBUG_OBJECT (trans, "no output caps, source pad has been deactivated");
+ gst_caps_unref (incaps);
+ return GST_FLOW_FLUSHING;
+ }
}
typedef struct
GstBaseTransformClass *klass;
const GstMetaInfo *info = (*meta)->info;
GstBuffer *outbuf = data->outbuf;
- gboolean do_copy;
+ gboolean do_copy = FALSE;
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
- if (GST_META_FLAG_IS_SET (*meta, GST_META_FLAG_POOLED)) {
- /* never call the transform_meta with pool private metadata */
- GST_DEBUG_OBJECT (trans, "not copying pooled metadata %s",
- g_type_name (info->api));
- do_copy = FALSE;
- } else if (gst_meta_api_type_has_tag (info->api, GST_META_TAG_MEMORY)) {
+ if (gst_meta_api_type_has_tag (info->api, _gst_meta_tag_memory)) {
/* never call the transform_meta with memory specific metadata */
GST_DEBUG_OBJECT (trans, "not copying memory specific metadata %s",
g_type_name (info->api));
do_copy = klass->transform_meta (trans, outbuf, *meta, inbuf);
GST_DEBUG_OBJECT (trans, "transformed metadata %s: copy: %d",
g_type_name (info->api), do_copy);
- } else {
- do_copy = FALSE;
- GST_DEBUG_OBJECT (trans, "not copying metadata %s",
- g_type_name (info->api));
}
/* we only copy metadata when the subclass implemented a transform_meta
- * function and when it returns TRUE */
+ * function and when it returns %TRUE */
if (do_copy) {
GstMetaTransformCopy copy_data = { FALSE, 0, -1 };
- GST_DEBUG_OBJECT (trans, "copy metadata %s", g_type_name (info->api));
/* simply copy then */
- info->transform_func (outbuf, *meta, inbuf,
- _gst_meta_transform_copy, ©_data);
+ if (info->transform_func) {
+ GST_DEBUG_OBJECT (trans, "copy metadata %s", g_type_name (info->api));
+ info->transform_func (outbuf, *meta, inbuf,
+ _gst_meta_transform_copy, ©_data);
+ } else {
+ GST_DEBUG_OBJECT (trans, "couldn't copy metadata %s",
+ g_type_name (info->api));
+ }
}
return TRUE;
}
}
}
-/* Given @caps calcultate the size of one unit.
+/* Given @caps calculate the size of one unit.
*
* For video caps, this is the size of one frame (and thus one buffer).
* For audio caps, this is the size of one sample.
* We have two cache locations to store the size, one for the source caps
* and one for the sink caps.
*
- * this function returns FALSE if no size could be calculated.
+ * this function returns %FALSE if no size could be calculated.
*/
static gboolean
gst_base_transform_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
res = bclass->get_unit_size (trans, caps, size);
GST_DEBUG_OBJECT (trans,
- "caps %" GST_PTR_FORMAT ") has unit size %" G_GSIZE_FORMAT ", res %s",
+ "caps %" GST_PTR_FORMAT " has unit size %" G_GSIZE_FORMAT ", res %s",
caps, *size, res ? "TRUE" : "FALSE");
if (res) {
GstBaseTransformClass *bclass;
gboolean ret = TRUE;
- trans = GST_BASE_TRANSFORM (parent);
+ trans = GST_BASE_TRANSFORM_CAST (parent);
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (bclass->sink_event)
/* clear any pending reconfigure flag */
gst_pad_check_reconfigure (trans->srcpad);
ret = gst_base_transform_setcaps (trans, trans->sinkpad, caps);
+ if (!ret)
+ gst_pad_mark_reconfigure (trans->srcpad);
forward = FALSE;
break;
GstBaseTransformClass *bclass;
gboolean ret = TRUE;
- trans = GST_BASE_TRANSFORM (parent);
+ trans = GST_BASE_TRANSFORM_CAST (parent);
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (bclass->src_event)
return ret;
}
-/* perform a transform on @inbuf and put the result in @outbuf.
- *
- * This function is common to the push and pull-based operations.
- *
- * This function takes ownership of @inbuf */
+/* Takes the input buffer */
static GstFlowReturn
-gst_base_transform_handle_buffer (GstBaseTransform * trans, GstBuffer * inbuf,
- GstBuffer ** outbuf)
+default_submit_input_buffer (GstBaseTransform * trans, gboolean is_discont,
+ GstBuffer * inbuf)
{
- GstBaseTransformClass *bclass;
+ GstBaseTransformClass *bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
GstBaseTransformPrivate *priv = trans->priv;
GstFlowReturn ret = GST_FLOW_OK;
- gboolean want_in_place;
GstClockTime running_time;
GstClockTime timestamp;
- gboolean reconfigure;
-
- bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
-
- reconfigure = gst_pad_check_reconfigure (trans->srcpad);
-
- if (G_UNLIKELY (reconfigure)) {
- GstCaps *incaps;
-
- GST_DEBUG_OBJECT (trans, "we had a pending reconfigure");
-
- incaps = gst_pad_get_current_caps (trans->sinkpad);
- if (incaps == NULL)
- goto no_reconfigure;
- /* if we need to reconfigure we pretend new caps arrived. This
- * will reconfigure the transform with the new output format. */
- if (!gst_base_transform_setcaps (trans, trans->sinkpad, incaps)) {
- gst_caps_unref (incaps);
- goto not_negotiated;
- }
- gst_caps_unref (incaps);
- }
+ if (G_UNLIKELY (!gst_base_transform_reconfigure (trans)))
+ goto not_negotiated;
-no_reconfigure:
if (GST_BUFFER_OFFSET_IS_VALID (inbuf))
GST_DEBUG_OBJECT (trans,
- "handling buffer %p of size %" G_GSIZE_FORMAT " and offset %"
- G_GUINT64_FORMAT, inbuf, gst_buffer_get_size (inbuf),
- GST_BUFFER_OFFSET (inbuf));
+ "handling buffer %p of size %" G_GSIZE_FORMAT ", PTS %" GST_TIME_FORMAT
+ " and offset %" G_GUINT64_FORMAT, inbuf, gst_buffer_get_size (inbuf),
+ GST_TIME_ARGS (GST_BUFFER_PTS (inbuf)), GST_BUFFER_OFFSET (inbuf));
else
GST_DEBUG_OBJECT (trans,
- "handling buffer %p of size %" G_GSIZE_FORMAT " and offset NONE", inbuf,
- gst_buffer_get_size (inbuf));
+ "handling buffer %p of size %" G_GSIZE_FORMAT ", PTS %" GST_TIME_FORMAT
+ " and offset NONE", inbuf, gst_buffer_get_size (inbuf),
+ GST_TIME_ARGS (GST_BUFFER_PTS (inbuf)));
/* Don't allow buffer handling before negotiation, except in passthrough mode
* or if the class doesn't implement a set_caps function (in which case it doesn't
if (!priv->negotiated && !priv->passthrough && (bclass->set_caps != NULL))
goto not_negotiated;
- /* Set discont flag so we can mark the outgoing buffer */
- if (GST_BUFFER_IS_DISCONT (inbuf)) {
- GST_DEBUG_OBJECT (trans, "got DISCONT buffer %p", inbuf);
- priv->discont = TRUE;
- }
-
/* can only do QoS if the segment is in TIME */
if (trans->segment.format != GST_FORMAT_TIME)
goto no_qos;
/* mark discont for next buffer */
priv->discont = TRUE;
+ ret = GST_BASE_TRANSFORM_FLOW_DROPPED;
goto skip;
}
}
no_qos:
+ /* Stash input buffer where the default generate_output
+ * function can find it */
+ if (trans->queued_buf)
+ gst_buffer_unref (trans->queued_buf);
+ trans->queued_buf = inbuf;
+ return ret;
+skip:
+ gst_buffer_unref (inbuf);
+ return ret;
+
+not_negotiated:
+ {
+ gst_buffer_unref (inbuf);
+ if (GST_PAD_IS_FLUSHING (trans->srcpad))
+ return GST_FLOW_FLUSHING;
+ return GST_FLOW_NOT_NEGOTIATED;
+ }
+}
+
+static GstFlowReturn
+default_generate_output (GstBaseTransform * trans, GstBuffer ** outbuf)
+{
+ GstBaseTransformClass *bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
+ GstBaseTransformPrivate *priv = trans->priv;
+ GstFlowReturn ret = GST_FLOW_OK;
+ GstBuffer *inbuf;
+ gboolean want_in_place;
+
+ /* Retrieve stashed input buffer, if the default submit_input_buffer
+ * was run. Takes ownership back from there */
+ inbuf = trans->queued_buf;
+ trans->queued_buf = NULL;
+
+ /* This default processing method needs one input buffer to feed to
+ * the transform functions, we can't do anything without it */
+ if (inbuf == NULL)
+ return GST_FLOW_OK;
/* first try to allocate an output buffer based on the currently negotiated
* format. outbuf will contain a buffer suitable for doing the configured
}
}
-skip:
/* only unref input buffer if we allocated a new outbuf buffer. If we reused
* the input buffer, no refcount is changed to keep the input buffer writable
* when needed. */
return ret;
/* ERRORS */
-not_negotiated:
- {
- gst_buffer_unref (inbuf);
- *outbuf = NULL;
- GST_ELEMENT_ERROR (trans, STREAM, FORMAT,
- ("not negotiated"), ("not negotiated"));
- return GST_FLOW_NOT_NEGOTIATED;
- }
no_prepare:
{
gst_buffer_unref (inbuf);
gst_base_transform_getrange (GstPad * pad, GstObject * parent, guint64 offset,
guint length, GstBuffer ** buffer)
{
- GstBaseTransform *trans;
- GstBaseTransformClass *klass;
+ GstBaseTransformClass *klass = GST_BASE_TRANSFORM_GET_CLASS (parent);
+ GstBaseTransform *trans = GST_BASE_TRANSFORM_CAST (parent);
+ GstBaseTransformPrivate *priv = trans->priv;
GstFlowReturn ret;
GstBuffer *inbuf = NULL;
+ GstBuffer *outbuf = NULL;
- trans = GST_BASE_TRANSFORM (parent);
+ /* Try and generate a buffer, if the sub-class wants more data,
+ * pull some and repeat until a buffer (or error) is produced */
+ do {
+ ret = klass->generate_output (trans, &outbuf);
- ret = gst_pad_pull_range (trans->sinkpad, offset, length, &inbuf);
- if (G_UNLIKELY (ret != GST_FLOW_OK))
- goto pull_error;
+ /* Consume the DROPPED return value and go get more data */
+ if (ret == GST_BASE_TRANSFORM_FLOW_DROPPED)
+ ret = GST_FLOW_OK;
- klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
- if (klass->before_transform)
- klass->before_transform (trans, inbuf);
+ if (ret != GST_FLOW_OK || outbuf != NULL)
+ break;
+
+ /* No buffer generated, try and pull data */
+ ret = gst_pad_pull_range (trans->sinkpad, offset, length, &inbuf);
+ if (G_UNLIKELY (ret != GST_FLOW_OK))
+ goto pull_error;
+
+ if (klass->before_transform)
+ klass->before_transform (trans, inbuf);
+
+ /* Set discont flag so we can mark the next outgoing buffer */
+ if (GST_BUFFER_IS_DISCONT (inbuf)) {
+ GST_DEBUG_OBJECT (trans, "got DISCONT buffer %p", inbuf);
+ priv->discont = TRUE;
+ }
- ret = gst_base_transform_handle_buffer (trans, inbuf, buffer);
+ /* FIXME: Input offsets and lengths need to be translated, as per
+ * the FIXME above. For now, just advance somewhat */
+ offset += gst_buffer_get_size (inbuf);
+ ret = klass->submit_input_buffer (trans, priv->discont, inbuf);
+ if (ret != GST_FLOW_OK) {
+ if (ret == GST_BASE_TRANSFORM_FLOW_DROPPED)
+ ret = GST_FLOW_OK;
+ goto done;
+ }
+ } while (ret == GST_FLOW_OK && outbuf == NULL);
+
+ *buffer = outbuf;
+ if (outbuf) {
+ /* apply DISCONT flag if the buffer is not yet marked as such */
+ if (priv->discont) {
+ GST_DEBUG_OBJECT (trans, "we have a pending DISCONT");
+ if (!GST_BUFFER_IS_DISCONT (outbuf)) {
+ GST_DEBUG_OBJECT (trans, "marking DISCONT on output buffer");
+ outbuf = gst_buffer_make_writable (outbuf);
+ GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
+ }
+ priv->discont = FALSE;
+ }
+ priv->processed++;
+ }
done:
return ret;
}
}
+/* The flow of the chain function is the reverse of the
+ * getrange() function - we have data, feed it to the sub-class
+ * and then iterate, pushing buffers it generates until it either
+ * wants more data or returns an error */
static GstFlowReturn
gst_base_transform_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
- GstBaseTransform *trans;
- GstBaseTransformClass *klass;
- GstBaseTransformPrivate *priv;
+ GstBaseTransform *trans = GST_BASE_TRANSFORM_CAST (parent);
+ GstBaseTransformClass *klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
+ GstBaseTransformPrivate *priv = trans->priv;
GstFlowReturn ret;
GstClockTime position = GST_CLOCK_TIME_NONE;
GstClockTime timestamp, duration;
GstBuffer *outbuf = NULL;
- trans = GST_BASE_TRANSFORM (parent);
- priv = trans->priv;
-
timestamp = GST_BUFFER_TIMESTAMP (buffer);
duration = GST_BUFFER_DURATION (buffer);
position = timestamp;
}
- klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (klass->before_transform)
klass->before_transform (trans, buffer);
- /* protect transform method and concurrent buffer alloc */
- ret = gst_base_transform_handle_buffer (trans, buffer, &outbuf);
-
- /* outbuf can be NULL, this means a dropped buffer, if we have a buffer but
- * GST_BASE_TRANSFORM_FLOW_DROPPED we will not push either. */
- if (outbuf != NULL) {
- if (ret == GST_FLOW_OK) {
- GstClockTime position_out = GST_CLOCK_TIME_NONE;
-
- /* Remember last stop position */
- if (position != GST_CLOCK_TIME_NONE &&
- trans->segment.format == GST_FORMAT_TIME)
- trans->segment.position = position;
-
- if (GST_BUFFER_TIMESTAMP_IS_VALID (outbuf)) {
- position_out = GST_BUFFER_TIMESTAMP (outbuf);
- if (GST_BUFFER_DURATION_IS_VALID (outbuf))
- position_out += GST_BUFFER_DURATION (outbuf);
- } else if (position != GST_CLOCK_TIME_NONE) {
- position_out = position;
- }
- if (position_out != GST_CLOCK_TIME_NONE
- && trans->segment.format == GST_FORMAT_TIME)
- priv->position_out = position_out;
-
- /* apply DISCONT flag if the buffer is not yet marked as such */
- if (trans->priv->discont) {
- GST_DEBUG_OBJECT (trans, "we have a pending DISCONT");
- if (!GST_BUFFER_IS_DISCONT (outbuf)) {
- GST_DEBUG_OBJECT (trans, "marking DISCONT on output buffer");
- outbuf = gst_buffer_make_writable (outbuf);
- GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
+ /* Set discont flag so we can mark the outgoing buffer */
+ if (GST_BUFFER_IS_DISCONT (buffer)) {
+ GST_DEBUG_OBJECT (trans, "got DISCONT buffer %p", buffer);
+ priv->discont = TRUE;
+ }
+
+ /* Takes ownership of input buffer */
+ ret = klass->submit_input_buffer (trans, priv->discont, buffer);
+ if (ret != GST_FLOW_OK)
+ goto done;
+
+ do {
+ outbuf = NULL;
+
+ ret = klass->generate_output (trans, &outbuf);
+
+ /* outbuf can be NULL, this means a dropped buffer, if we have a buffer but
+ * GST_BASE_TRANSFORM_FLOW_DROPPED we will not push either. */
+ if (outbuf != NULL) {
+ if (ret == GST_FLOW_OK) {
+ GstClockTime position_out = GST_CLOCK_TIME_NONE;
+
+ /* Remember last stop position */
+ if (position != GST_CLOCK_TIME_NONE &&
+ trans->segment.format == GST_FORMAT_TIME)
+ trans->segment.position = position;
+
+ if (GST_BUFFER_TIMESTAMP_IS_VALID (outbuf)) {
+ position_out = GST_BUFFER_TIMESTAMP (outbuf);
+ if (GST_BUFFER_DURATION_IS_VALID (outbuf))
+ position_out += GST_BUFFER_DURATION (outbuf);
+ } else if (position != GST_CLOCK_TIME_NONE) {
+ position_out = position;
}
- priv->discont = FALSE;
- }
- priv->processed++;
+ if (position_out != GST_CLOCK_TIME_NONE
+ && trans->segment.format == GST_FORMAT_TIME)
+ priv->position_out = position_out;
+
+ /* apply DISCONT flag if the buffer is not yet marked as such */
+ if (trans->priv->discont) {
+ GST_DEBUG_OBJECT (trans, "we have a pending DISCONT");
+ if (!GST_BUFFER_IS_DISCONT (outbuf)) {
+ GST_DEBUG_OBJECT (trans, "marking DISCONT on output buffer");
+ outbuf = gst_buffer_make_writable (outbuf);
+ GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
+ }
+ priv->discont = FALSE;
+ }
+ priv->processed++;
- ret = gst_pad_push (trans->srcpad, outbuf);
- } else {
- GST_DEBUG_OBJECT (trans, "we got return %s", gst_flow_get_name (ret));
- gst_buffer_unref (outbuf);
+ ret = gst_pad_push (trans->srcpad, outbuf);
+ } else {
+ GST_DEBUG_OBJECT (trans, "we got return %s", gst_flow_get_name (ret));
+ gst_buffer_unref (outbuf);
+ }
}
- }
+ } while (ret == GST_FLOW_OK && outbuf != NULL);
+done:
/* convert internal flow to OK and mark discont for the next buffer. */
if (ret == GST_BASE_TRANSFORM_FLOW_DROPPED) {
GST_DEBUG_OBJECT (trans, "dropped a buffer, marking DISCONT");
{
GstBaseTransform *trans;
- trans = GST_BASE_TRANSFORM (object);
+ trans = GST_BASE_TRANSFORM_CAST (object);
switch (prop_id) {
case PROP_QOS:
{
GstBaseTransform *trans;
- trans = GST_BASE_TRANSFORM (object);
+ trans = GST_BASE_TRANSFORM_CAST (object);
switch (prop_id) {
case PROP_QOS:
GST_PAD_STREAM_UNLOCK (trans->sinkpad);
priv->have_same_caps = FALSE;
- /* We can only reset the passthrough mode if the instance told us to
+ /* We can only reset the passthrough mode if the instance told us to
handle it in configure_caps */
if (bclass->passthrough_on_same_caps) {
gst_base_transform_set_passthrough (trans, FALSE);
gst_caps_replace (&priv->cache_caps1, NULL);
gst_caps_replace (&priv->cache_caps2, NULL);
+ /* Make sure any left over buffer is freed */
+ gst_buffer_replace (&trans->queued_buf, NULL);
+
if (priv->pad_mode != GST_PAD_MODE_NONE && bclass->stop)
result &= bclass->stop (trans);
gboolean result = FALSE;
GstBaseTransform *trans;
- trans = GST_BASE_TRANSFORM (parent);
+ trans = GST_BASE_TRANSFORM_CAST (parent);
switch (mode) {
case GST_PAD_MODE_PUSH:
gboolean result = FALSE;
GstBaseTransform *trans;
- trans = GST_BASE_TRANSFORM (parent);
+ trans = GST_BASE_TRANSFORM_CAST (parent);
switch (mode) {
case GST_PAD_MODE_PULL:
* Set passthrough mode for this filter by default. This is mostly
* useful for filters that do not care about negotiation.
*
- * Always TRUE for filters which don't implement either a transform
+ * Always %TRUE for filters which don't implement either a transform
* or transform_ip method.
*
* MT safe.
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
GST_OBJECT_LOCK (trans);
- if (passthrough == FALSE) {
+ if (!passthrough) {
if (bclass->transform_ip || bclass->transform)
trans->priv->passthrough = FALSE;
} else {
*
* See if @trans is configured as a passthrough transform.
*
- * Returns: TRUE is the transform is configured in passthrough mode.
+ * Returns: %TRUE is the transform is configured in passthrough mode.
*
* MT safe.
*/
*
* Determines whether a non-writable buffer will be copied before passing
* to the transform_ip function.
- * <itemizedlist>
- * <listitem>Always TRUE if no transform function is implemented.</listitem>
- * <listitem>Always FALSE if ONLY transform function is implemented.</listitem>
- * </itemizedlist>
+ *
+ * * Always %TRUE if no transform function is implemented.
+ * * Always %FALSE if ONLY transform function is implemented.
*
* MT safe.
*/
*
* See if @trans is configured as a in_place transform.
*
- * Returns: TRUE is the transform is configured in in_place mode.
+ * Returns: %TRUE is the transform is configured in in_place mode.
*
* MT safe.
*/
* when needed.
*
* MT safe.
- *
- * Since: 0.10.5
*/
void
gst_base_transform_update_qos (GstBaseTransform * trans,
* Enable or disable QoS handling in the transform.
*
* MT safe.
- *
- * Since: 0.10.5
*/
void
gst_base_transform_set_qos_enabled (GstBaseTransform * trans, gboolean enabled)
*
* Queries if the transform will handle QoS.
*
- * Returns: TRUE if QoS is enabled.
+ * Returns: %TRUE if QoS is enabled.
*
* MT safe.
- *
- * Since: 0.10.5
*/
gboolean
gst_base_transform_is_qos_enabled (GstBaseTransform * trans)
* unset the flag if the output is no neutral data.
*
* MT safe.
- *
- * Since: 0.10.16
*/
void
gst_base_transform_set_gap_aware (GstBaseTransform * trans, gboolean gap_aware)
}
/**
+ * gst_base_transform_set_prefer_passthrough:
+ * @trans: a #GstBaseTransform
+ * @prefer_passthrough: New state
+ *
+ * If @prefer_passthrough is %TRUE (the default), @trans will check and
+ * prefer passthrough caps from the list of caps returned by the
+ * transform_caps vmethod.
+ *
+ * If set to %FALSE, the element must order the caps returned from the
+ * transform_caps function in such a way that the preferred format is
+ * first in the list. This can be interesting for transforms that can do
+ * passthrough transforms but prefer to do something else, like a
+ * capsfilter.
+ *
+ * MT safe.
+ *
+ * Since: 1.0.1
+ */
+void
+gst_base_transform_set_prefer_passthrough (GstBaseTransform * trans,
+ gboolean prefer_passthrough)
+{
+ g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
+
+ GST_OBJECT_LOCK (trans);
+ trans->priv->prefer_passthrough = prefer_passthrough;
+ GST_DEBUG_OBJECT (trans, "prefer passthrough %d", prefer_passthrough);
+ GST_OBJECT_UNLOCK (trans);
+}
+
+/**
* gst_base_transform_reconfigure_sink:
* @trans: a #GstBaseTransform
*
* Instructs @trans to renegotiate a new downstream transform on the next
* buffer. This function is typically called after properties on the transform
* were set that influence the output format.
- *
- * Since: 0.10.21
*/
void
gst_base_transform_reconfigure_src (GstBaseTransform * trans)
gst_pad_mark_reconfigure (trans->srcpad);
}
+
+/**
+ * gst_base_transform_get_buffer_pool:
+ * @trans: a #GstBaseTransform
+ *
+ * Returns: (transfer full): the instance of the #GstBufferPool used
+ * by @trans; free it after use it
+ */
+GstBufferPool *
+gst_base_transform_get_buffer_pool (GstBaseTransform * trans)
+{
+ g_return_val_if_fail (GST_IS_BASE_TRANSFORM (trans), NULL);
+
+ if (trans->priv->pool)
+ return gst_object_ref (trans->priv->pool);
+
+ return NULL;
+}
+
+/**
+ * gst_base_transform_get_allocator:
+ * @trans: a #GstBaseTransform
+ * @allocator: (out) (allow-none) (transfer full): the #GstAllocator
+ * used
+ * @params: (out) (allow-none) (transfer full): the
+ * #GstAllocationParams of @allocator
+ *
+ * Lets #GstBaseTransform sub-classes to know the memory @allocator
+ * used by the base class and its @params.
+ *
+ * Unref the @allocator after use it.
+ */
+void
+gst_base_transform_get_allocator (GstBaseTransform * trans,
+ GstAllocator ** allocator, GstAllocationParams * params)
+{
+ g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
+
+ if (allocator)
+ *allocator = trans->priv->allocator ?
+ gst_object_ref (trans->priv->allocator) : NULL;
+
+ if (params)
+ *params = trans->priv->params;
+}
+
+/**
+ * gst_base_transform_update_src_caps:
+ * @trans: a #GstBaseTransform
+ * @updated_caps: An updated version of the srcpad caps to be pushed
+ * downstream
+ *
+ * Updates the srcpad caps and send the caps downstream. This function
+ * can be used by subclasses when they have already negotiated their caps
+ * but found a change in them (or computed new information). This way,
+ * they can notify downstream about that change without losing any
+ * buffer.
+ *
+ * Returns: %TRUE if the caps could be send downstream %FALSE otherwise
+ *
+ * Since: 1.6
+ */
+gboolean
+gst_base_transform_update_src_caps (GstBaseTransform * trans,
+ GstCaps * updated_caps)
+{
+ g_return_val_if_fail (GST_IS_BASE_TRANSFORM (trans), FALSE);
+
+ if (gst_pad_push_event (GST_BASE_TRANSFORM_SRC_PAD (trans),
+ gst_event_new_caps (updated_caps))) {
+ gst_pad_mark_reconfigure (trans->srcpad);
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
projects / platform / upstream / gstreamer.git / blobdiff