/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
- * 2000 Wim Taymans <wtay@chello.be>
* 2005 Wim Taymans <wim@fluendo.com>
* 2005 Andy Wingo <wingo@fluendo.com>
* 2005 Thomas Vander Stichele <thomas at apestaart dot org>
+ * 2008 Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* 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)
+ * 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>
+ * <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>
+ * <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>
* 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.
+ * 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>
+ * 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
+ * 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>
+ * <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>
+ * <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.
+ * 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
+ * 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>
+ * <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>
* <itemizedlist>
* <title>Example elements</title>
- * <listitem>Videoscale, ffmpegcolorspace, audioconvert when doing scaling/conversions</listitem>
+ * <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
+ * 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>
* 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
+ * 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>
#include <stdlib.h>
#include <string.h>
+#include "../../../gst/gst_private.h"
#include "../../../gst/gst-i18n-lib.h"
#include "gstbasetransform.h"
#include <gst/gstmarshal.h>
LAST_SIGNAL
};
+#define DEFAULT_PROP_QOS FALSE
+
enum
{
PROP_0,
+ PROP_QOS
+};
+
+#define GST_BASE_TRANSFORM_GET_PRIVATE(obj) \
+ (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_TRANSFORM, GstBaseTransformPrivate))
+
+struct _GstBaseTransformPrivate
+{
+ /* QoS *//* with LOCK */
+ gboolean qos_enabled;
+ gdouble proportion;
+ GstClockTime earliest_time;
+ /* previous buffer had a discont */
+ gboolean discont;
+
+ GstActivateMode pad_mode;
+
+ gboolean gap_aware;
+
+ /* caps used for allocating buffers */
+ gboolean proxy_alloc;
+ GstCaps *sink_alloc;
+ GstCaps *src_alloc;
+ /* upstream caps and size suggestions */
+ GstCaps *sink_suggest;
+ guint size_suggest;
};
static GstElementClass *parent_class = NULL;
-static void gst_base_transform_base_init (gpointer g_class);
static void gst_base_transform_class_init (GstBaseTransformClass * klass);
static void gst_base_transform_init (GstBaseTransform * trans,
GstBaseTransformClass * klass);
-static GstFlowReturn gst_base_transform_prepare_output_buf (GstBaseTransform *
- trans, GstBuffer * input, gint size, GstCaps * caps, GstBuffer ** buf);
+static GstFlowReturn gst_base_transform_prepare_output_buffer (GstBaseTransform
+ * trans, GstBuffer * input, GstBuffer ** buf);
GType
gst_base_transform_get_type (void)
if (!base_transform_type) {
static const GTypeInfo base_transform_info = {
sizeof (GstBaseTransformClass),
- (GBaseInitFunc) gst_base_transform_base_init,
+ NULL,
NULL,
(GClassInitFunc) gst_base_transform_class_init,
NULL,
gboolean active);
static gboolean gst_base_transform_sink_activate_push (GstPad * pad,
gboolean active);
+static gboolean gst_base_transform_activate (GstBaseTransform * trans,
+ gboolean active);
static gboolean gst_base_transform_get_unit_size (GstBaseTransform * trans,
GstCaps * caps, guint * size);
-static GstStateChangeReturn gst_base_transform_change_state (GstElement *
- element, GstStateChange transition);
-
-static gboolean gst_base_transform_event (GstPad * pad, GstEvent * event);
-static gboolean gst_base_transform_eventfunc (GstBaseTransform * trans,
+static gboolean gst_base_transform_src_event (GstPad * pad, GstEvent * event);
+static gboolean gst_base_transform_src_eventfunc (GstBaseTransform * trans,
+ GstEvent * event);
+static gboolean gst_base_transform_sink_event (GstPad * pad, GstEvent * event);
+static gboolean gst_base_transform_sink_eventfunc (GstBaseTransform * trans,
GstEvent * event);
+static gboolean gst_base_transform_check_get_range (GstPad * pad);
static GstFlowReturn gst_base_transform_getrange (GstPad * pad, guint64 offset,
guint length, GstBuffer ** buffer);
static GstFlowReturn gst_base_transform_chain (GstPad * pad,
/* static guint gst_base_transform_signals[LAST_SIGNAL] = { 0 }; */
static void
-gst_base_transform_base_init (gpointer g_class)
-{
- GST_DEBUG_CATEGORY_INIT (gst_base_transform_debug, "basetransform", 0,
- "basetransform element");
-}
-
-static void
gst_base_transform_finalize (GObject * object)
{
GstBaseTransform *trans;
trans = GST_BASE_TRANSFORM (object);
+ gst_caps_replace (&trans->priv->sink_suggest, NULL);
g_mutex_free (trans->transform_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
gst_base_transform_class_init (GstBaseTransformClass * klass)
{
GObjectClass *gobject_class;
- GstElementClass *gstelement_class;
gobject_class = G_OBJECT_CLASS (klass);
- gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ 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->get_property =
GST_DEBUG_FUNCPTR (gst_base_transform_get_property);
- gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_transform_finalize);
+ g_object_class_install_property (gobject_class, PROP_QOS,
+ g_param_spec_boolean ("qos", "QoS", "Handle Quality-of-Service events",
+ DEFAULT_PROP_QOS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
- gstelement_class->change_state =
- GST_DEBUG_FUNCPTR (gst_base_transform_change_state);
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_transform_finalize);
klass->passthrough_on_same_caps = FALSE;
- klass->event = GST_DEBUG_FUNCPTR (gst_base_transform_eventfunc);
+ klass->event = GST_DEBUG_FUNCPTR (gst_base_transform_sink_eventfunc);
+ klass->src_event = GST_DEBUG_FUNCPTR (gst_base_transform_src_eventfunc);
}
static void
GST_DEBUG ("gst_base_transform_init");
+ trans->priv = GST_BASE_TRANSFORM_GET_PRIVATE (trans);
+
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
g_return_if_fail (pad_template != NULL);
gst_pad_set_setcaps_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_setcaps));
gst_pad_set_event_function (trans->sinkpad,
- GST_DEBUG_FUNCPTR (gst_base_transform_event));
+ GST_DEBUG_FUNCPTR (gst_base_transform_sink_event));
gst_pad_set_chain_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_chain));
gst_pad_set_activatepush_function (trans->sinkpad,
trans->srcpad = gst_pad_new_from_template (pad_template, "src");
gst_pad_set_getcaps_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_getcaps));
- gst_pad_set_setcaps_function (trans->srcpad,
- GST_DEBUG_FUNCPTR (gst_base_transform_setcaps));
+ gst_pad_set_event_function (trans->srcpad,
+ GST_DEBUG_FUNCPTR (gst_base_transform_src_event));
+ gst_pad_set_checkgetrange_function (trans->srcpad,
+ GST_DEBUG_FUNCPTR (gst_base_transform_check_get_range));
gst_pad_set_getrange_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_getrange));
gst_pad_set_activatepull_function (trans->srcpad,
gst_element_add_pad (GST_ELEMENT (trans), trans->srcpad);
trans->transform_lock = g_mutex_new ();
- trans->delay_configure = FALSE;
trans->pending_configure = FALSE;
+ trans->priv->qos_enabled = DEFAULT_PROP_QOS;
trans->cache_caps1 = NULL;
trans->cache_caps2 = NULL;
+ trans->priv->pad_mode = GST_ACTIVATE_NONE;
+ trans->priv->gap_aware = FALSE;
trans->passthrough = FALSE;
if (bclass->transform == NULL) {
GST_DEBUG_OBJECT (trans, "setting in_place TRUE");
trans->always_in_place = TRUE;
- if (bclass->transform_ip == NULL)
+ if (bclass->transform_ip == NULL) {
+ GST_DEBUG_OBJECT (trans, "setting passthrough TRUE");
trans->passthrough = TRUE;
+ }
}
}
+/* given @caps on the src or sink pad (given by @direction)
+ * calculate the possible caps on the other pad.
+ *
+ * Returns new caps, unref after usage.
+ */
static GstCaps *
gst_base_transform_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps)
GstCaps *ret;
GstBaseTransformClass *klass;
+ if (caps == NULL)
+ return NULL;
+
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
/* if there is a custom transform function, use this */
GstCaps *temp;
gint i;
+ /* start with empty caps */
ret = gst_caps_new_empty ();
+ GST_DEBUG_OBJECT (trans, "transform caps (direction = %d)", direction);
if (gst_caps_is_any (caps)) {
/* for any caps we still have to call the transform function */
- GST_DEBUG_OBJECT (trans, "from ANY:");
+ GST_DEBUG_OBJECT (trans, "from: ANY");
temp = klass->transform_caps (trans, direction, caps);
GST_DEBUG_OBJECT (trans, " to: %" GST_PTR_FORMAT, temp);
+ temp = gst_caps_make_writable (temp);
gst_caps_append (ret, temp);
} else {
/* we send caps with just one structure to the transform
GstCaps *nth;
nth = gst_caps_copy_nth (caps, i);
- GST_DEBUG_OBJECT (trans, "from[%d]: %" GST_PTR_FORMAT, i, nth);
+ GST_LOG_OBJECT (trans, "from[%d]: %" GST_PTR_FORMAT, i, nth);
temp = klass->transform_caps (trans, direction, nth);
gst_caps_unref (nth);
- GST_DEBUG_OBJECT (trans, " to[%d]: %" GST_PTR_FORMAT, i, temp);
+ GST_LOG_OBJECT (trans, " to[%d]: %" GST_PTR_FORMAT, i, temp);
+
+ temp = gst_caps_make_writable (temp);
+ /* here we need to only append those structures, that are not yet
+ * in there, we use the merge function for this */
+ gst_caps_merge (ret, temp);
- gst_caps_append (ret, temp);
+ GST_LOG_OBJECT (trans, " merged[%d]: %" GST_PTR_FORMAT, i, ret);
}
+ GST_LOG_OBJECT (trans, "merged: (%d)", gst_caps_get_size (ret));
+ /* we can't do much simplification here because we don't really want to
+ * change the caps order */
}
} else {
- /* else use the identity transform */
+ GST_DEBUG_OBJECT (trans, "identity from: %" GST_PTR_FORMAT, caps);
+ /* no transform function, use the identity transform */
ret = gst_caps_ref (caps);
}
- GST_DEBUG_OBJECT (trans, "to: %" GST_PTR_FORMAT, ret);
+ GST_DEBUG_OBJECT (trans, "to: (%d) %" GST_PTR_FORMAT, gst_caps_get_size (ret),
+ ret);
return ret;
}
+/* transform a buffer of @size with @caps on the pad with @direction to
+ * the size of a buffer with @othercaps and store the result in @othersize
+ *
+ * We have two ways of doing this:
+ * 1) use a custom transform size function, this is for complicated custom
+ * cases with no fixed unit_size.
+ * 2) use the unit_size functions where there is a relationship between the
+ * caps and the size of a buffer.
+ */
static gboolean
gst_base_transform_transform_size (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps,
{
guint inunitsize, outunitsize, units;
GstBaseTransformClass *klass;
- gint ret = -1;
+ gboolean ret;
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
GST_PTR_FORMAT " to size for caps %" GST_PTR_FORMAT " in direction %s",
size, caps, othercaps, direction == GST_PAD_SRC ? "SRC" : "SINK");
- /* if there is a custom transform function, use this */
if (klass->transform_size) {
+ /* if there is a custom transform function, use this */
ret = klass->transform_size (trans, direction, caps, size, othercaps,
othersize);
} else {
- gboolean got_in_unit_size, got_out_unit_size;
+ /* there is no transform_size function, we have to use the unit_size
+ * functions. This method assumes there is a fixed unit_size associated with
+ * each caps. We provide the same amount of units on both sides. */
+ if (!gst_base_transform_get_unit_size (trans, caps, &inunitsize))
+ goto no_in_size;
- got_in_unit_size = gst_base_transform_get_unit_size (trans, caps,
- &inunitsize);
- g_return_val_if_fail (got_in_unit_size == TRUE, FALSE);
GST_DEBUG_OBJECT (trans, "input size %d, input unit size %d", size,
inunitsize);
- g_return_val_if_fail (inunitsize != 0, FALSE);
- if (size % inunitsize != 0) {
- g_warning ("Size %u is not a multiple of unit size %u", size, inunitsize);
- return FALSE;
- }
+ /* input size must be a multiple of the unit_size of the input caps */
+ if (inunitsize == 0 || (size % inunitsize != 0))
+ goto no_multiple;
+
+ /* get the amount of units */
units = size / inunitsize;
- got_out_unit_size = gst_base_transform_get_unit_size (trans, othercaps,
- &outunitsize);
- g_return_val_if_fail (got_out_unit_size == TRUE, FALSE);
+ /* now get the unit size of the output */
+ if (!gst_base_transform_get_unit_size (trans, othercaps, &outunitsize))
+ goto no_out_size;
+
+ /* the output size is the unit_size times the amount of units on the
+ * input */
*othersize = units * outunitsize;
GST_DEBUG_OBJECT (trans, "transformed size to %d", *othersize);
- }
+ ret = TRUE;
+ }
return ret;
+
+ /* ERRORS */
+no_in_size:
+ {
+ GST_DEBUG_OBJECT (trans, "could not get in_size");
+ g_warning ("%s: could not get in_size", GST_ELEMENT_NAME (trans));
+ return FALSE;
+ }
+no_multiple:
+ {
+ GST_DEBUG_OBJECT (trans, "Size %u is not a multiple of unit size %u", size,
+ inunitsize);
+ g_warning ("%s: size %u is not a multiple of unit size %u",
+ GST_ELEMENT_NAME (trans), size, inunitsize);
+ return FALSE;
+ }
+no_out_size:
+ {
+ GST_DEBUG_OBJECT (trans, "could not get out_size");
+ g_warning ("%s: could not get out_size", GST_ELEMENT_NAME (trans));
+ return FALSE;
+ }
}
+/* get the caps that can be handled by @pad. We perforn:
+ *
+ * - take the caps of peer of otherpad,
+ * - filter against the padtemplate of otherpad,
+ * - calculate all transforms of remaining caps
+ * - filter against template of @pad
+ *
+ * If there is no peer, we simply return the caps of the padtemplate of pad.
+ */
static GstCaps *
gst_base_transform_getcaps (GstPad * pad)
{
return caps;
}
+/* function triggered when the in and out caps are negotiated and need
+ * to be configured in the subclass. */
static gboolean
gst_base_transform_configure_caps (GstBaseTransform * trans, GstCaps * in,
GstCaps * out)
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
+ GST_DEBUG_OBJECT (trans, "in caps: %" GST_PTR_FORMAT, in);
+ GST_DEBUG_OBJECT (trans, "out caps: %" GST_PTR_FORMAT, out);
+
/* clear the cache */
gst_caps_replace (&trans->cache_caps1, NULL);
gst_caps_replace (&trans->cache_caps2, NULL);
+ /* figure out same caps state */
+ trans->have_same_caps = gst_caps_is_equal (in, out);
+ GST_DEBUG_OBJECT (trans, "have_same_caps: %d", trans->have_same_caps);
+
/* If we've a transform_ip method and same input/output caps, set in_place
* by default. If for some reason the sub-class prefers using a transform
* function, it can clear the in place flag in the set_caps */
return ret;
}
+/* check if caps @in on @pad can be transformed to @out on the other pad.
+ * We don't have a vmethod to test this yet so we have to do a somewhat less
+ * efficient check for this.
+ */
static gboolean
-gst_base_transform_setcaps (GstPad * pad, GstCaps * caps)
+gst_base_transform_can_transform (GstBaseTransform * trans, GstPad * pad,
+ GstCaps * in, GstCaps * out)
+{
+ GstCaps *othercaps;
+
+ /* convert the in caps to all possible out caps */
+ othercaps =
+ gst_base_transform_transform_caps (trans, GST_PAD_DIRECTION (pad), in);
+
+ /* check if transform is empty */
+ if (!othercaps || gst_caps_is_empty (othercaps))
+ goto no_transform;
+
+ /* check if the out caps is a subset of the othercaps */
+ if (!gst_caps_is_subset (out, othercaps))
+ goto no_subset;
+
+ if (othercaps)
+ gst_caps_unref (othercaps);
+
+ GST_DEBUG_OBJECT (trans, "from %" GST_PTR_FORMAT, in);
+ GST_DEBUG_OBJECT (trans, "to %" GST_PTR_FORMAT, out);
+
+ return TRUE;
+
+ /* ERRORS */
+no_transform:
+ {
+ GST_DEBUG_OBJECT (trans,
+ "transform returned useless %" GST_PTR_FORMAT, othercaps);
+ if (othercaps)
+ gst_caps_unref (othercaps);
+ return FALSE;
+ }
+no_subset:
+ {
+ GST_DEBUG_OBJECT (trans, "no subset");
+ if (othercaps)
+ gst_caps_unref (othercaps);
+ return FALSE;
+ }
+}
+
+/* given a fixed @caps on @pad, create the best possible caps for the
+ * other pad.
+ * @caps must be fixed when calling this function.
+ *
+ * This function calls the transform caps vmethod of the basetransform to figure
+ * out the possible target formats. It then tries to select the best format from
+ * this list by:
+ *
+ * - attempt passthrough if the target caps is a superset of the input caps
+ * - fixating by using peer caps
+ * - fixating with transform fixate function
+ * - fixating with pad fixate functions.
+ *
+ * this function returns a caps that can be transformed into and is accepted by
+ * the peer element.
+ */
+static GstCaps *
+gst_base_transform_find_transform (GstBaseTransform * trans, GstPad * pad,
+ GstCaps * caps)
{
- GstBaseTransform *trans;
GstBaseTransformClass *klass;
GstPad *otherpad, *otherpeer;
- GstCaps *othercaps = NULL;
- gboolean ret = TRUE;
+ GstCaps *othercaps;
gboolean peer_checked = FALSE;
- trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
+ /* caps must be fixed here, this is a programming error if it's not */
+ g_return_val_if_fail (gst_caps_is_fixed (caps), NULL);
+
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
otherpeer = gst_pad_get_peer (otherpad);
- /* if we get called recursively, we bail out now to avoid an
- * infinite loop. */
- if (GST_PAD_IS_IN_SETCAPS (otherpad))
- goto done;
-
- /* caps must be fixed here */
- if (!gst_caps_is_fixed (caps))
- goto unfixed_caps;
-
- /* see how we can transform the input caps. */
+ /* see how we can transform the input caps. We need to do this even for
+ * passthrough because it might be possible that this element cannot support
+ * passthrough at all. */
othercaps = gst_base_transform_transform_caps (trans,
GST_PAD_DIRECTION (pad), caps);
const GstCaps *templ_caps;
templ_caps = gst_pad_get_pad_template_caps (otherpad);
+ GST_DEBUG_OBJECT (trans,
+ "intersecting against padtemplate %" GST_PTR_FORMAT, templ_caps);
+
intersect = gst_caps_intersect (othercaps, templ_caps);
gst_caps_unref (othercaps);
/* if the othercaps are not fixed, we need to fixate them, first attempt
* is by attempting passthrough if the othercaps are a superset of caps. */
+ /* FIXME. maybe the caps is not fixed because it has multiple structures of
+ * fixed caps */
if (!gst_caps_is_fixed (othercaps)) {
GstCaps *temp;
temp = gst_caps_intersect (othercaps, caps);
GST_DEBUG_OBJECT (trans, "intersect returned %" GST_PTR_FORMAT, temp);
if (temp) {
- if (!gst_caps_is_empty (temp) && otherpeer) {
+ if (!gst_caps_is_empty (temp)) {
GST_DEBUG_OBJECT (trans, "try passthrough with %" GST_PTR_FORMAT, caps);
- /* try passthrough. we know it's fixed, because caps is fixed */
- if (gst_pad_accept_caps (otherpeer, caps)) {
- GST_DEBUG_OBJECT (trans, "peer accepted %" GST_PTR_FORMAT, caps);
- /* peer accepted unmodified caps, we free the original non-fixed
- * caps and work with the passthrough caps */
+ if (otherpeer) {
+ /* try passthrough. we know it's fixed, because caps is fixed */
+ if (gst_pad_accept_caps (otherpeer, caps)) {
+ GST_DEBUG_OBJECT (trans, "peer accepted %" GST_PTR_FORMAT, caps);
+ /* peer accepted unmodified caps, we free the original non-fixed
+ * caps and work with the passthrough caps */
+ gst_caps_unref (othercaps);
+ othercaps = gst_caps_ref (caps);
+ /* mark that we checked othercaps with the peer, this
+ * makes sure we don't call accept_caps again with these same
+ * caps */
+ peer_checked = TRUE;
+ } else {
+ GST_DEBUG_OBJECT (trans,
+ "peer did not accept %" GST_PTR_FORMAT, caps);
+ }
+ } else {
+ GST_DEBUG_OBJECT (trans, "no peer, doing passthrough");
gst_caps_unref (othercaps);
othercaps = gst_caps_ref (caps);
- /* mark that we checked othercaps with the peer, this
- * makes sure we don't call accept_caps again with these same
- * caps */
- peer_checked = TRUE;
- } else {
- GST_DEBUG_OBJECT (trans,
- "peer did not accept %" GST_PTR_FORMAT, caps);
}
}
gst_caps_unref (temp);
if (!peer_checked && otherpeer && !gst_pad_accept_caps (otherpeer, othercaps))
goto peer_no_accept;
- GST_DEBUG_OBJECT (trans, "got final caps %" GST_PTR_FORMAT, othercaps);
+ GST_DEBUG_OBJECT (trans, "Input caps were %" GST_PTR_FORMAT
+ ", and got final caps %" GST_PTR_FORMAT, caps, othercaps);
- trans->have_same_caps = gst_caps_is_equal (caps, othercaps);
- GST_DEBUG_OBJECT (trans, "have_same_caps: %d", trans->have_same_caps);
+ if (otherpeer)
+ gst_object_unref (otherpeer);
- /* see if we have to configure the element now */
- if (!trans->delay_configure) {
- GstCaps *incaps, *outcaps;
+ return othercaps;
- /* make sure in and out caps are correct */
- if (pad == trans->sinkpad) {
- incaps = caps;
- outcaps = othercaps;
- } else {
- incaps = othercaps;
- outcaps = caps;
- }
- /* call configure now */
- if (!(ret = gst_base_transform_configure_caps (trans, incaps, outcaps)))
- goto failed_configure;
+ /* ERRORS */
+no_transform:
+ {
+ GST_DEBUG_OBJECT (trans,
+ "transform returned useless %" GST_PTR_FORMAT, othercaps);
+ goto error_cleanup;
+ }
+no_transform_possible:
+ {
+ GST_DEBUG_OBJECT (trans,
+ "transform could not transform %" GST_PTR_FORMAT
+ " in anything we support", caps);
+ goto error_cleanup;
+ }
+could_not_fixate:
+ {
+ GST_DEBUG_OBJECT (trans, "FAILED to fixate %" GST_PTR_FORMAT, othercaps);
+ goto error_cleanup;
+ }
+peer_no_accept:
+ {
+ GST_DEBUG_OBJECT (trans, "FAILED to get peer of %" GST_PTR_FORMAT
+ " to accept %" GST_PTR_FORMAT, otherpad, othercaps);
+ goto error_cleanup;
+ }
+error_cleanup:
+ {
+ if (otherpeer)
+ gst_object_unref (otherpeer);
+ if (othercaps)
+ gst_caps_unref (othercaps);
+ return NULL;
+ }
+}
+
+/* called when new caps arrive on the sink or source pad,
+ * We try to find the best caps for the other side using our _find_transform()
+ * function. If there are caps, we configure the transform for this new
+ * transformation.
+ *
+ * FIXME, this function is currently commutative but this should not really be
+ * because we never set caps starting from the srcpad.
+ */
+static gboolean
+gst_base_transform_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstBaseTransform *trans;
+ GstBaseTransformClass *klass;
+ GstPad *otherpad, *otherpeer;
+ GstCaps *othercaps = NULL;
+ gboolean ret = TRUE;
+ GstCaps *incaps, *outcaps;
+
+ trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
+ klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
+
+ otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
+ otherpeer = gst_pad_get_peer (otherpad);
+
+ /* if we get called recursively, we bail out now to avoid an
+ * infinite loop. */
+ if (GST_PAD_IS_IN_SETCAPS (otherpad))
+ goto done;
+
+ GST_DEBUG_OBJECT (pad, "have new caps %" GST_PTR_FORMAT, caps);
+
+ /* find best possible caps for the other pad */
+ othercaps = gst_base_transform_find_transform (trans, pad, caps);
+ if (!othercaps || gst_caps_is_empty (othercaps))
+ goto no_transform_possible;
+
+ /* configure the element now */
+ /* make sure in and out caps are correct */
+ if (pad == trans->sinkpad) {
+ incaps = caps;
+ outcaps = othercaps;
} else {
- /* set pending configure, the configure will happen later with the
- * caps we set on the pads above. */
- trans->pending_configure = TRUE;
+ incaps = othercaps;
+ outcaps = caps;
}
+#if 0
+ /* if we have the same caps, we can optimize and reuse the input caps */
+ if (gst_caps_is_equal (incaps, outcaps)) {
+ GST_INFO_OBJECT (trans, "reuse caps");
+ gst_caps_unref (outcaps);
+ outcaps = gst_caps_ref (incaps);
+ }
+#endif
+
+ /* call configure now */
+ if (!(ret = gst_base_transform_configure_caps (trans, incaps, outcaps)))
+ goto failed_configure;
+
/* we know this will work, we implement the setcaps */
gst_pad_set_caps (otherpad, othercaps);
+ if (pad == trans->srcpad && trans->priv->pad_mode == GST_ACTIVATE_PULL) {
+ /* FIXME hm? */
+ ret &= gst_pad_set_caps (otherpeer, othercaps);
+ if (!ret) {
+ GST_INFO_OBJECT (trans, "otherpeer setcaps(%" GST_PTR_FORMAT ") failed",
+ othercaps);
+ }
+ }
+
done:
if (otherpeer)
gst_object_unref (otherpeer);
return ret;
/* ERRORS */
-unfixed_caps:
- {
- GST_DEBUG_OBJECT (trans, "caps are not fixed %" GST_PTR_FORMAT, caps);
- ret = FALSE;
- goto done;
- }
-no_transform:
- {
- GST_DEBUG_OBJECT (trans,
- "transform returned useless %" GST_PTR_FORMAT, othercaps);
- ret = FALSE;
- goto done;
- }
no_transform_possible:
{
- GST_DEBUG_OBJECT (trans,
+ GST_WARNING_OBJECT (trans,
"transform could not transform %" GST_PTR_FORMAT
" in anything we support", caps);
ret = FALSE;
goto done;
}
-could_not_fixate:
- {
- GST_ERROR_OBJECT (trans, "FAILED to fixate %" GST_PTR_FORMAT, othercaps);
- ret = FALSE;
- goto done;
- }
-peer_no_accept:
- {
- GST_DEBUG_OBJECT (trans, "FAILED to get peer of %" GST_PTR_FORMAT
- " to accept %" GST_PTR_FORMAT, otherpad, othercaps);
- ret = FALSE;
- goto done;
- }
failed_configure:
{
- GST_DEBUG_OBJECT (trans, "FAILED to configure caps %" GST_PTR_FORMAT
+ GST_WARNING_OBJECT (trans, "FAILED to configure caps %" GST_PTR_FORMAT
" to accept %" GST_PTR_FORMAT, otherpad, othercaps);
ret = FALSE;
goto done;
}
}
-/* Allocate a buffer using gst_pad_alloc_buffer_and_set_caps.
+/* Allocate a buffer using gst_pad_alloc_buffer
+ *
+ * This function can do renegotiation on the source pad
*
- * This function can trigger a renegotiation on the source pad when the
- * peer alloc_buffer function sets new caps. Since we currently are
- * processing a buffer on the sinkpad when this function is called, we cannot
- * reconfigure the transform with sinkcaps different from those of the current
- * buffer. FIXME, we currently don't check if the pluging can transform to the
- * new srcpad caps using the same sinkcaps, we alloc a proper outbuf buffer
- * ourselves instead.
+ * The output buffer is always writable. outbuf can be equal to
+ * inbuf, the caller should be prepared for this and perform
+ * appropriate refcounting.
*/
static GstFlowReturn
-gst_base_transform_prepare_output_buf (GstBaseTransform * trans,
- GstBuffer * in_buf, gint out_size, GstCaps * out_caps, GstBuffer ** out_buf)
+gst_base_transform_prepare_output_buffer (GstBaseTransform * trans,
+ GstBuffer * in_buf, GstBuffer ** out_buf)
{
GstBaseTransformClass *bclass;
+ GstBaseTransformPrivate *priv;
GstFlowReturn ret = GST_FLOW_OK;
- gboolean copy_inbuf = FALSE;
+ guint outsize, newsize;
+ gboolean discard;
+ GstCaps *incaps, *oldcaps, *newcaps;
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
- /* we cannot reconfigure the element yet as we are still processing
- * the old buffer. We will therefore delay the reconfiguration of the
- * element until we have processed this last buffer. */
- trans->delay_configure = TRUE;
- /* out_caps is the caps of the src pad gathered through the GST_PAD_CAPS
- macro. If a set_caps occurs during this function this caps will become
- invalid. We want to keep them during preparation of the output buffer. */
- if (out_caps)
- gst_caps_ref (out_caps);
-
- /* see if the subclass wants to alloc a buffer */
+ priv = trans->priv;
+
+ /* figure out how to allocate a buffer based on the current configuration */
+ if (trans->passthrough) {
+ GST_DEBUG_OBJECT (trans, "doing passthrough alloc");
+ /* passthrough, we don't really need to call pad alloc but we still need to
+ * in order to get upstream negotiation. The output size is the same as the
+ * input size. */
+ outsize = GST_BUFFER_SIZE (in_buf);
+ /* we always alloc and discard here */
+ discard = TRUE;
+ } else {
+ gboolean want_in_place = (bclass->transform_ip != NULL)
+ && trans->always_in_place;
+
+ if (want_in_place) {
+ GST_DEBUG_OBJECT (trans, "doing inplace alloc");
+ /* we alloc a buffer of the same size as the input */
+ outsize = GST_BUFFER_SIZE (in_buf);
+ /* only discard it when the input was not writable, otherwise, we reuse
+ * the input buffer. */
+ discard = gst_buffer_is_writable (in_buf);
+ } else {
+ GST_DEBUG_OBJECT (trans, "getting output size for copy transform");
+ /* copy transform, figure out the output size */
+ if (!gst_base_transform_transform_size (trans,
+ GST_PAD_SINK, GST_PAD_CAPS (trans->sinkpad),
+ GST_BUFFER_SIZE (in_buf), GST_PAD_CAPS (trans->srcpad),
+ &outsize)) {
+ goto unknown_size;
+ }
+ /* never discard this buffer, we need it for storing the output */
+ discard = FALSE;
+ }
+ }
+
+ oldcaps = GST_PAD_CAPS (trans->srcpad);
+
if (bclass->prepare_output_buffer) {
+ GST_DEBUG_OBJECT (trans,
+ "calling prepare buffer with caps %" GST_PTR_FORMAT, oldcaps);
ret =
- bclass->prepare_output_buffer (trans, in_buf, out_size, out_caps,
+ bclass->prepare_output_buffer (trans, in_buf, outsize, oldcaps,
out_buf);
- if (ret != GST_FLOW_OK)
- goto done;
+
+ /* FIXME 0.11:
+ * decrease refcount again if vmethod returned refcounted in_buf. This
+ * is because we need to make sure that the buffer is writable for the
+ * in_place transform. The docs of the vmethod say that you should return
+ * a reffed inbuf, which is exactly what we don't want :), oh well.. */
+ if (in_buf == *out_buf)
+ gst_buffer_unref (in_buf);
+
+ /* never discard the buffer from the prepare_buffer method */
+ discard = FALSE;
+ } else {
+ GST_DEBUG_OBJECT (trans, "doing alloc with caps %" GST_PTR_FORMAT, oldcaps);
+
+ ret = gst_pad_alloc_buffer (trans->srcpad,
+ GST_BUFFER_OFFSET (in_buf), outsize, oldcaps, out_buf);
}
- /* See if we want to prepare the buffer for in place output */
- if (*out_buf == NULL && GST_BUFFER_SIZE (in_buf) == out_size
- && bclass->transform_ip) {
- if (gst_buffer_is_writable (in_buf)) {
- if (trans->have_same_caps) {
- /* Input buffer is already writable and caps are the same, just ref and return it */
- *out_buf = in_buf;
- gst_buffer_ref (in_buf);
- } else {
- /* Writable buffer, but need to change caps => subbuffer */
- *out_buf = gst_buffer_create_sub (in_buf, 0, GST_BUFFER_SIZE (in_buf));
- gst_caps_replace (&GST_BUFFER_CAPS (*out_buf), out_caps);
+ if (ret != GST_FLOW_OK)
+ goto alloc_failed;
+
+ /* must always return a buffer */
+ g_assert (*out_buf != NULL);
+
+ /* check if we got different caps on this new output buffer */
+ newcaps = GST_BUFFER_CAPS (*out_buf);
+ newsize = GST_BUFFER_SIZE (*out_buf);
+ if (!gst_caps_is_equal (newcaps, oldcaps)) {
+ GstCaps *othercaps;
+ gboolean can_convert;
+
+ GST_DEBUG_OBJECT (trans, "received new caps %" GST_PTR_FORMAT, newcaps);
+
+ incaps = GST_PAD_CAPS (trans->sinkpad);
+
+ /* it's possible that the buffer we got is of the wrong size, get the
+ * expected size here */
+ gst_base_transform_transform_size (trans,
+ GST_PAD_SINK, incaps, GST_BUFFER_SIZE (in_buf), newcaps, &outsize);
+
+ /* check if we can convert the current incaps to the new target caps */
+ can_convert =
+ gst_base_transform_can_transform (trans, trans->sinkpad, incaps,
+ newcaps);
+
+ if (can_convert) {
+ GST_DEBUG_OBJECT (trans, "reconfigure transform for current buffer");
+ /* caps not empty, try to renegotiate to the new format */
+ if (!gst_base_transform_configure_caps (trans, incaps, newcaps)) {
+ /* not sure we need to fail hard here, we can simply continue our
+ * conversion with what we negotiated before */
+ goto failed_configure;
}
- goto done;
+ /* new format configure, and use the new output buffer */
+ gst_pad_set_caps (trans->srcpad, newcaps);
+ discard = FALSE;
} else {
- /* Make a writable buffer below and copy the data */
- copy_inbuf = TRUE;
+ GST_DEBUG_OBJECT (trans, "cannot perform transform on current buffer");
+
+ /* we cannot convert the current buffer but we might be able to suggest a
+ * new format upstream, try to find what the best format is. */
+ othercaps =
+ gst_base_transform_find_transform (trans, trans->srcpad, newcaps);
+
+ if (!othercaps) {
+ GST_DEBUG_OBJECT (trans, "incompatible caps, ignoring");
+ /* we received caps that we cannot transform. Upstream is behaving badly
+ * because it should have checked if we could handle these caps. We can
+ * simply ignore these caps and produce a buffer with our original caps. */
+ } else {
+ guint size_suggest;
+
+ GST_DEBUG_OBJECT (trans, "getting size of suggestion");
+
+ /* not a subset, we have a new upstream suggestion, remember it and
+ * allocate a default buffer. First we try to convert the size */
+ if (gst_base_transform_transform_size (trans,
+ GST_PAD_SRC, newcaps, outsize, othercaps, &size_suggest)) {
+
+ /* ok, remember the suggestions now */
+ GST_DEBUG_OBJECT (trans,
+ "storing new caps and size suggestion of %u and %" GST_PTR_FORMAT,
+ size_suggest, othercaps);
+
+ GST_OBJECT_LOCK (trans->sinkpad);
+ if (priv->sink_suggest)
+ gst_caps_unref (priv->sink_suggest);
+ priv->sink_suggest = gst_caps_ref (othercaps);
+ priv->size_suggest = size_suggest;
+ GST_OBJECT_UNLOCK (trans->sinkpad);
+ }
+ gst_caps_unref (othercaps);
+ }
+ if (in_buf != *out_buf)
+ gst_buffer_unref (*out_buf);
+ *out_buf = NULL;
+ }
+
+ /* if we got a buffer of the wrong size, discard it now */
+ if (newsize != outsize) {
+ if (in_buf != *out_buf)
+ gst_buffer_unref (*out_buf);
+ *out_buf = NULL;
+ discard = FALSE;
}
}
if (*out_buf == NULL) {
- /* Sub-class didn't already provide a buffer for us. Make one */
- ret =
- gst_pad_alloc_buffer_and_set_caps (trans->srcpad,
- GST_BUFFER_OFFSET (in_buf), out_size, out_caps, out_buf);
- if (ret != GST_FLOW_OK || *out_buf == NULL)
- goto done;
-
- /* allocated buffer could be of different caps than what we requested */
- if (G_UNLIKELY (!gst_caps_is_equal (out_caps, GST_BUFFER_CAPS (*out_buf)))) {
- /* FIXME, it is possible we can reconfigure the transform with new caps at this
- * point but for now we just create a buffer ourselves */
+ if (!discard) {
+ GST_DEBUG_OBJECT (trans, "make default output buffer");
+ /* no valid buffer yet, make one */
+ *out_buf = gst_buffer_new_and_alloc (outsize);
+ gst_buffer_copy_metadata (*out_buf, in_buf,
+ GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS);
+ } else {
+ GST_DEBUG_OBJECT (trans, "reuse input buffer");
+ *out_buf = in_buf;
+ }
+ } else {
+ if (discard) {
+ GST_DEBUG_OBJECT (trans, "discard buffer, reuse input buffer");
gst_buffer_unref (*out_buf);
- *out_buf = gst_buffer_new_and_alloc (out_size);
- gst_buffer_set_caps (*out_buf, out_caps);
+ *out_buf = in_buf;
+ } else {
+ GST_DEBUG_OBJECT (trans, "using pad-alloc buffer");
+ gst_buffer_copy_metadata (*out_buf, in_buf,
+ GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS);
}
}
+ gst_buffer_set_caps (*out_buf, GST_PAD_CAPS (trans->srcpad));
- /* If the output buffer metadata is modifiable, copy timestamps and
- * buffer flags */
- if (*out_buf != in_buf && gst_buffer_is_metadata_writable (*out_buf) == 1) {
+ /* clear the GAP flag when the subclass does not understand it */
+ if (!trans->priv->gap_aware)
+ GST_BUFFER_FLAG_UNSET (*out_buf, GST_BUFFER_FLAG_GAP);
- if (copy_inbuf && gst_buffer_is_writable (*out_buf))
- memcpy (GST_BUFFER_DATA (*out_buf), GST_BUFFER_DATA (in_buf), out_size);
+ return ret;
- gst_buffer_stamp (*out_buf, in_buf);
- GST_BUFFER_FLAGS (*out_buf) |= GST_BUFFER_FLAGS (in_buf) &
- (GST_BUFFER_FLAG_PREROLL | GST_BUFFER_FLAG_IN_CAPS |
- GST_BUFFER_FLAG_DELTA_UNIT);
+ /* ERRORS */
+alloc_failed:
+ {
+ GST_WARNING_OBJECT (trans, "pad-alloc failed: %s", gst_flow_get_name (ret));
+ return ret;
+ }
+unknown_size:
+ {
+ GST_ERROR_OBJECT (trans, "unknown output size");
+ return GST_FLOW_ERROR;
+ }
+failed_configure:
+ {
+ GST_WARNING_OBJECT (trans, "failed to configure caps");
+ return GST_FLOW_NOT_NEGOTIATED;
}
-
-done:
- if (out_caps)
- gst_caps_unref (out_caps);
- trans->delay_configure = FALSE;
-
- return ret;
}
+/* Given @caps calcultate 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.
+ *
+ * These values are cached since they do not change and the calculation
+ * potentially involves parsing caps and other expensive stuff.
+ *
+ * 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.
+ */
static gboolean
gst_base_transform_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
guint * size)
/* see if we have the result cached */
if (trans->cache_caps1 == caps) {
*size = trans->cache_caps1_size;
- GST_DEBUG_OBJECT (trans, "get size returned cached 1 %d", *size);
+ GST_DEBUG_OBJECT (trans, "returned %d from first cache", *size);
return TRUE;
}
if (trans->cache_caps2 == caps) {
*size = trans->cache_caps2_size;
- GST_DEBUG_OBJECT (trans, "get size returned cached 2 %d", *size);
+ GST_DEBUG_OBJECT (trans, "returned %d from second cached", *size);
return TRUE;
}
") has unit size %d, result %s", caps, *size, res ? "TRUE" : "FALSE");
if (res) {
+ /* and cache the values */
if (trans->cache_caps1 == NULL) {
gst_caps_replace (&trans->cache_caps1, caps);
trans->cache_caps1_size = *size;
+ GST_DEBUG_OBJECT (trans, "caching %d in first cache", *size);
} else if (trans->cache_caps2 == NULL) {
gst_caps_replace (&trans->cache_caps2, caps);
trans->cache_caps2_size = *size;
+ GST_DEBUG_OBJECT (trans, "caching %d in second cache", *size);
+ } else {
+ GST_DEBUG_OBJECT (trans, "no free spot to cache unit_size");
}
}
} else {
- GST_DEBUG ("Sub-class does not implement get_unit_size");
+ GST_DEBUG_OBJECT (trans, "Sub-class does not implement get_unit_size");
}
return res;
}
GstCaps * caps, GstBuffer ** buf)
{
GstBaseTransform *trans;
+ GstBaseTransformPrivate *priv;
GstFlowReturn res;
- guint new_size;
+ gboolean proxy = FALSE, suggest = FALSE;
+ GstCaps *sink_suggest;
+ guint size_suggest = 0;
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
+ priv = trans->priv;
- /* we cannot run this when we are transforming data and as such doing
- * another negotiation in the transform method. */
- g_mutex_lock (trans->transform_lock);
+ GST_DEBUG_OBJECT (pad, "alloc with caps %" GST_PTR_FORMAT ", size %u", caps,
+ size);
*buf = NULL;
- GST_DEBUG_OBJECT (trans, "allocating a buffer of size %d ...", size, offset);
- if (offset == GST_BUFFER_OFFSET_NONE)
- GST_DEBUG_OBJECT (trans, "... and offset NONE");
- else
- GST_DEBUG_OBJECT (trans, "... and offset %" G_GUINT64_FORMAT, offset);
-
- /* before any buffers are pushed, have_same_caps is TRUE; allocating can trigger
- * a renegotiation and change that to FALSE */
- if (trans->have_same_caps) {
- /* request a buffer with the same caps */
- GST_DEBUG_OBJECT (trans, "requesting buffer with same caps, size %d", size);
-
- res =
- gst_pad_alloc_buffer_and_set_caps (trans->srcpad, offset, size, caps,
- buf);
+ /* we remember our previous alloc request to quickly see if we can proxy or
+ * not. */
+ if (caps && gst_caps_is_equal (priv->sink_alloc, caps)) {
+ /* we have seen this before, see if we need to proxy */
+ GST_DEBUG_OBJECT (trans, "have old caps");
+ sink_suggest = caps;
+ suggest = FALSE;
+ res = GST_FLOW_OK;
} else {
- /* if we are configured, request a buffer with the src caps */
- GstCaps *srccaps = gst_pad_get_negotiated_caps (trans->srcpad);
- GstCaps *sinkcaps = gst_pad_get_negotiated_caps (trans->sinkpad);
-
- if (!srccaps)
- goto not_configured;
-
- if (sinkcaps != NULL) {
- if (sinkcaps != caps || !gst_caps_is_equal (sinkcaps, caps)) {
- gst_caps_unref (sinkcaps);
- gst_caps_unref (srccaps);
- goto not_configured;
- }
- gst_caps_unref (sinkcaps);
+ GstCaps *temp, *othercaps;
+ const GstCaps *templ;
+ gboolean empty;
+
+ GST_DEBUG_OBJECT (trans, "new format %" GST_PTR_FORMAT, caps);
+
+ /* if we have a suggestion, pretend we got these as input */
+ GST_OBJECT_LOCK (pad);
+ if ((priv->sink_suggest && !gst_caps_is_equal (caps, priv->sink_suggest))) {
+ sink_suggest = gst_caps_ref (priv->sink_suggest);
+ size_suggest = priv->size_suggest;
+ GST_DEBUG_OBJECT (trans, "have suggestion %" GST_PTR_FORMAT,
+ sink_suggest);
+ suggest = TRUE;
+ } else {
+ GST_DEBUG_OBJECT (trans, "using caps %" GST_PTR_FORMAT, caps);
+ sink_suggest = caps;
+ suggest = FALSE;
}
+ GST_OBJECT_UNLOCK (pad);
- GST_DEBUG_OBJECT (trans, "calling transform_size");
- if (!gst_base_transform_transform_size (trans,
- GST_PAD_DIRECTION (pad), caps, size, srccaps, &new_size)) {
- gst_caps_unref (srccaps);
- goto unknown_size;
- }
+ /* check if we actually handle this format on the sinkpad */
+ if (sink_suggest) {
+ templ = gst_pad_get_pad_template_caps (pad);
+ temp = gst_caps_intersect (sink_suggest, templ);
- res =
- gst_pad_alloc_buffer_and_set_caps (trans->srcpad, offset, new_size,
- srccaps, buf);
- gst_caps_unref (srccaps);
- }
+ empty = gst_caps_is_empty (temp);
+ gst_caps_unref (temp);
- if (res == GST_FLOW_OK && !trans->have_same_caps) {
- /* note that we might have had same caps before, but calling the
- alloc_buffer caused setcaps to switch us out of in_place -- in any case
- the alloc_buffer served to transmit caps information but we can't use the
- buffer. fall through and allocate a buffer corresponding to our sink
- caps, if any */
- GstCaps *sinkcaps = gst_pad_get_negotiated_caps (trans->sinkpad);
- GstCaps *srccaps = gst_pad_get_negotiated_caps (trans->srcpad);
-
- if (!sinkcaps)
- goto not_configured;
-
- if (!gst_base_transform_transform_size (trans,
- GST_PAD_DIRECTION (trans->srcpad), srccaps, GST_BUFFER_SIZE (*buf),
- sinkcaps, &new_size)) {
- gst_caps_unref (srccaps);
- gst_caps_unref (sinkcaps);
- goto unknown_size;
+ if (empty)
+ goto not_supported;
}
- gst_buffer_unref (*buf);
-
- *buf = gst_buffer_new_and_alloc (new_size);
- gst_buffer_set_caps (*buf, sinkcaps);
- GST_BUFFER_OFFSET (*buf) = offset;
+ /* find the best format for the other side */
+ if (sink_suggest == NULL) {
+ /* always proxy when the caps are NULL. When this is a new format, see if
+ * we can proxy it downstream */
+ GST_DEBUG_OBJECT (trans, "null caps, marking for proxy");
+ priv->proxy_alloc = TRUE;
+ } else {
+ othercaps = gst_base_transform_find_transform (trans, pad, sink_suggest);
+ if (!othercaps || gst_caps_is_empty (othercaps)) {
+ /* no transform, can't proxy */
+ GST_DEBUG_OBJECT (trans, "can't find transform, disable proxy");
+ priv->proxy_alloc = FALSE;
+ } else {
+ if (gst_caps_is_equal (caps, othercaps)) {
+ GST_DEBUG_OBJECT (trans,
+ "best caps same as input, marking for proxy");
+ priv->proxy_alloc = TRUE;
+ } else {
+ GST_DEBUG_OBJECT (trans,
+ "best caps different from input, disable proxy");
+ priv->proxy_alloc = FALSE;
+ }
+ }
+ if (othercaps)
+ gst_caps_unref (othercaps);
+ }
+ }
+ /* remember the new caps */
+ gst_caps_replace (&priv->sink_alloc, sink_suggest);
+ proxy = priv->proxy_alloc;
+ GST_DEBUG_OBJECT (trans, "doing default alloc, proxy %d", proxy);
+
+ if (proxy) {
+ GstCaps *newcaps;
+
+ GST_DEBUG_OBJECT (trans, "proxy buffer-alloc with caps %" GST_PTR_FORMAT
+ ", size %u", caps, size);
+
+ res = gst_pad_alloc_buffer (trans->srcpad, offset, size, caps, buf);
+ if (res != GST_FLOW_OK)
+ goto alloc_failed;
+
+ /* check if the caps changed */
+ newcaps = GST_BUFFER_CAPS (*buf);
+
+ GST_DEBUG_OBJECT (trans, "got caps %" GST_PTR_FORMAT, newcaps);
+
+ if (newcaps != caps) {
+ GST_DEBUG_OBJECT (trans, "got new caps %" GST_PTR_FORMAT, newcaps);
+ if (!suggest) {
+ /* we have new caps, see if we can proxy downstream */
+ if (gst_pad_peer_accept_caps (trans->sinkpad, newcaps)) {
+ /* peer accepts the caps, return a buffer in this format */
+ GST_DEBUG_OBJECT (trans, "peer accepted new caps");
+ /* remember the format */
+ gst_caps_replace (&priv->sink_alloc, newcaps);
+ } else {
+ GST_DEBUG_OBJECT (trans, "peer did not accept new caps");
+ /* peer does not accept the caps, create a buffer of the requested
+ * format. */
+ gst_buffer_unref (*buf);
+ *buf = NULL;
+ }
+ }
+ }
+ }
+ if (suggest) {
+ *buf = gst_buffer_new_and_alloc (size_suggest);
+ GST_DEBUG_OBJECT (trans,
+ "doing suggestion of size %u, caps %" GST_PTR_FORMAT, size_suggest,
+ sink_suggest);
+ GST_BUFFER_CAPS (*buf) = sink_suggest;
res = GST_FLOW_OK;
-
- gst_caps_unref (srccaps);
- gst_caps_unref (sinkcaps);
}
- g_mutex_unlock (trans->transform_lock);
gst_object_unref (trans);
return res;
-not_configured:
+ /* ERRORS */
+alloc_failed:
{
- /* let the default allocator handle it */
- GST_DEBUG_OBJECT (trans, "not configured");
- if (*buf) {
- gst_buffer_unref (*buf);
- *buf = NULL;
- }
- g_mutex_unlock (trans->transform_lock);
+ GST_DEBUG_OBJECT (trans, "pad alloc failed: %s", gst_flow_get_name (res));
+ if (suggest)
+ gst_caps_unref (sink_suggest);
gst_object_unref (trans);
- return GST_FLOW_OK;
+ return res;
}
-unknown_size:
+not_supported:
{
- /* let the default allocator handle it */
- GST_DEBUG_OBJECT (trans, "unknown size");
- if (*buf) {
- gst_buffer_unref (*buf);
- *buf = NULL;
- }
- g_mutex_unlock (trans->transform_lock);
+ GST_DEBUG_OBJECT (trans, "pad alloc with unsupported caps");
+ if (suggest)
+ gst_caps_unref (sink_suggest);
gst_object_unref (trans);
- return GST_FLOW_OK;
+ return GST_FLOW_NOT_NEGOTIATED;
}
}
static gboolean
-gst_base_transform_event (GstPad * pad, GstEvent * event)
+gst_base_transform_sink_event (GstPad * pad, GstEvent * event)
{
GstBaseTransform *trans;
GstBaseTransformClass *bclass;
gboolean ret = TRUE;
+ gboolean forward = TRUE;
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (bclass->event)
- ret = bclass->event (trans, event);
+ forward = bclass->event (trans, event);
/* FIXME, do this in the default event handler so the subclass can do
* something different. */
- if (ret)
- ret = gst_pad_event_default (pad, event);
+ if (forward)
+ ret = gst_pad_push_event (trans->srcpad, event);
+ else
+ gst_event_unref (event);
gst_object_unref (trans);
}
static gboolean
-gst_base_transform_eventfunc (GstBaseTransform * trans, GstEvent * event)
+gst_base_transform_sink_eventfunc (GstBaseTransform * trans, GstEvent * event)
{
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
break;
case GST_EVENT_FLUSH_STOP:
+ GST_OBJECT_LOCK (trans);
+ /* reset QoS parameters */
+ trans->priv->proportion = 1.0;
+ trans->priv->earliest_time = -1;
+ trans->priv->discont = FALSE;
+ GST_OBJECT_UNLOCK (trans);
/* we need new segment info after the flush. */
+ trans->have_newsegment = FALSE;
gst_segment_init (&trans->segment, GST_FORMAT_UNDEFINED);
break;
case GST_EVENT_EOS:
case GST_EVENT_NEWSEGMENT:
{
GstFormat format;
- gdouble rate;
+ gdouble rate, arate;
gint64 start, stop, time;
gboolean update;
- gst_event_parse_new_segment (event, &update, &rate, &format, &start,
- &stop, &time);
-
- gst_segment_set_newsegment (&trans->segment, update, rate, format, start,
- stop, time);
+ gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
+ &start, &stop, &time);
trans->have_newsegment = TRUE;
+ gst_segment_set_newsegment_full (&trans->segment, update, rate, arate,
+ format, start, stop, time);
+
if (format == GST_FORMAT_TIME) {
- GST_DEBUG_OBJECT (trans, "received NEW_SEGMENT %" GST_TIME_FORMAT
+ GST_DEBUG_OBJECT (trans, "received TIME NEW_SEGMENT %" GST_TIME_FORMAT
" -- %" GST_TIME_FORMAT ", time %" GST_TIME_FORMAT
", accum %" GST_TIME_FORMAT,
GST_TIME_ARGS (trans->segment.start),
return TRUE;
}
+static gboolean
+gst_base_transform_src_event (GstPad * pad, GstEvent * event)
+{
+ GstBaseTransform *trans;
+ GstBaseTransformClass *bclass;
+ gboolean ret = TRUE;
+
+ trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
+ bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
+
+ if (bclass->src_event)
+ ret = bclass->src_event (trans, event);
+
+ gst_object_unref (trans);
+
+ return ret;
+}
+
+static gboolean
+gst_base_transform_src_eventfunc (GstBaseTransform * trans, GstEvent * event)
+{
+ gboolean ret;
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_SEEK:
+ break;
+ case GST_EVENT_NAVIGATION:
+ break;
+ case GST_EVENT_QOS:
+ {
+ gdouble proportion;
+ GstClockTimeDiff diff;
+ GstClockTime timestamp;
+
+ gst_event_parse_qos (event, &proportion, &diff, ×tamp);
+ gst_base_transform_update_qos (trans, proportion, diff, timestamp);
+ break;
+ }
+ default:
+ break;
+ }
+
+ ret = gst_pad_push_event (trans->sinkpad, 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 */
static GstFlowReturn
gst_base_transform_handle_buffer (GstBaseTransform * trans, GstBuffer * inbuf,
GstBuffer ** outbuf)
{
GstBaseTransformClass *bclass;
GstFlowReturn ret = GST_FLOW_OK;
- guint out_size;
gboolean want_in_place;
+ GstClockTime qostime;
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (GST_BUFFER_OFFSET_IS_VALID (inbuf))
- GST_LOG_OBJECT (trans, "handling buffer %p of size %d and offset %"
+ GST_DEBUG_OBJECT (trans, "handling buffer %p of size %d and offset %"
G_GUINT64_FORMAT, inbuf, GST_BUFFER_SIZE (inbuf),
GST_BUFFER_OFFSET (inbuf));
else
- GST_LOG_OBJECT (trans, "handling buffer %p of size %d and offset NONE",
+ GST_DEBUG_OBJECT (trans, "handling buffer %p of size %d and offset NONE",
inbuf, GST_BUFFER_SIZE (inbuf));
/* Don't allow buffer handling before negotiation, except in passthrough mode
if (!trans->negotiated && !trans->passthrough && (bclass->set_caps != NULL))
goto not_negotiated;
- if (trans->passthrough) {
- /* In passthrough mode, give transform_ip a look at the
- * buffer, without making it writable, or just push the
- * data through */
- GST_LOG_OBJECT (trans, "element is in passthrough mode");
-
- if (bclass->transform_ip)
- ret = bclass->transform_ip (trans, inbuf);
-
- *outbuf = inbuf;
-
- return ret;
+ /* 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);
+ trans->priv->discont = TRUE;
}
- want_in_place = (bclass->transform_ip != NULL) && trans->always_in_place;
- *outbuf = NULL;
-
- if (want_in_place) {
- /* If want_in_place is TRUE, we may need to prepare a new output buffer
- * Sub-classes can implement a prepare_output_buffer function as they
- * wish. */
- GST_LOG_OBJECT (trans, "doing inplace transform");
-
- ret = gst_base_transform_prepare_output_buf (trans, inbuf,
- GST_BUFFER_SIZE (inbuf), GST_PAD_CAPS (trans->srcpad), outbuf);
- if (G_UNLIKELY (ret != GST_FLOW_OK))
- goto no_buffer;
+ /* can only do QoS if the segment is in TIME */
+ if (trans->segment.format != GST_FORMAT_TIME)
+ goto no_qos;
+
+ /* QOS is done on the running time of the buffer, get it now */
+ qostime = gst_segment_to_running_time (&trans->segment, GST_FORMAT_TIME,
+ GST_BUFFER_TIMESTAMP (inbuf));
+
+ if (qostime != -1) {
+ gboolean need_skip;
+ GstClockTime earliest_time;
+
+ /* lock for getting the QoS parameters that are set (in a different thread)
+ * with the QOS events */
+ GST_OBJECT_LOCK (trans);
+ earliest_time = trans->priv->earliest_time;
+ /* check for QoS, don't perform conversion for buffers
+ * that are known to be late. */
+ need_skip = trans->priv->qos_enabled &&
+ earliest_time != -1 && qostime != -1 && qostime <= earliest_time;
+ GST_OBJECT_UNLOCK (trans);
+
+ if (need_skip) {
+ GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, trans, "skipping transform: qostime %"
+ GST_TIME_FORMAT " <= %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (qostime), GST_TIME_ARGS (earliest_time));
+ /* mark discont for next buffer */
+ trans->priv->discont = TRUE;
+ goto skip;
+ }
+ }
- ret = bclass->transform_ip (trans, *outbuf);
+no_qos:
- } else {
- GST_LOG_OBJECT (trans, "doing non-inplace transform");
+ /* first try to allocate an output buffer based on the currently negotiated
+ * format. While we call pad-alloc we could renegotiate the srcpad format or
+ * have a new suggestion for upstream buffer-alloc.
+ * In any case, outbuf will contain a buffer suitable for doing the configured
+ * transform after this function. */
+ ret = gst_base_transform_prepare_output_buffer (trans, inbuf, outbuf);
+ if (G_UNLIKELY (ret != GST_FLOW_OK))
+ goto no_buffer;
- /* not transforming inplace, figure out the output size */
- if (trans->always_in_place) {
- out_size = GST_BUFFER_SIZE (inbuf);
+ /* now perform the needed transform */
+ if (trans->passthrough) {
+ /* In passthrough mode, give transform_ip a look at the
+ * buffer, without making it writable, or just push the
+ * data through */
+ if (bclass->transform_ip) {
+ GST_DEBUG_OBJECT (trans, "doing passthrough transform");
+ ret = bclass->transform_ip (trans, *outbuf);
} else {
- if (!gst_base_transform_transform_size (trans,
- GST_PAD_DIRECTION (trans->sinkpad), GST_PAD_CAPS (trans->sinkpad),
- GST_BUFFER_SIZE (inbuf), GST_PAD_CAPS (trans->srcpad),
- &out_size)) {
- /* we have an error */
- goto no_size;
- }
+ GST_DEBUG_OBJECT (trans, "element is in passthrough");
}
+ } else {
+ want_in_place = (bclass->transform_ip != NULL) && trans->always_in_place;
- /* no in place transform, get buffer, this might renegotiate. */
- ret = gst_base_transform_prepare_output_buf (trans, inbuf, out_size,
- GST_PAD_CAPS (trans->srcpad), outbuf);
- if (ret != GST_FLOW_OK)
- goto no_buffer;
-
- if (bclass->transform)
- ret = bclass->transform (trans, inbuf, *outbuf);
- else
- ret = GST_FLOW_NOT_SUPPORTED;
- }
-
- /* if we got renegotiated we can configure now */
- if (trans->pending_configure) {
- gboolean success;
-
- success =
- gst_base_transform_configure_caps (trans,
- GST_PAD_CAPS (trans->sinkpad), GST_PAD_CAPS (trans->srcpad));
+ if (want_in_place) {
+ GST_DEBUG_OBJECT (trans, "doing inplace transform");
- trans->pending_configure = FALSE;
+ if (inbuf != *outbuf) {
+ /* different buffers, copy the input to the output first, we then do an
+ * in-place transform on the output buffer. */
+ memcpy (GST_BUFFER_DATA (*outbuf), GST_BUFFER_DATA (inbuf),
+ GST_BUFFER_SIZE (inbuf));
+ }
+ ret = bclass->transform_ip (trans, *outbuf);
+ } else {
+ GST_DEBUG_OBJECT (trans, "doing non-inplace transform");
- if (!success)
- goto configure_failed;
+ if (bclass->transform)
+ ret = bclass->transform (trans, inbuf, *outbuf);
+ else
+ ret = GST_FLOW_NOT_SUPPORTED;
+ }
}
- gst_buffer_unref (inbuf);
+
+skip:
+ /* only unref input buffer if we allocated a new outbuf buffer */
+ if (*outbuf != inbuf)
+ gst_buffer_unref (inbuf);
return ret;
("not negotiated"), ("not negotiated"));
return GST_FLOW_NOT_NEGOTIATED;
}
-no_size:
- {
- gst_buffer_unref (inbuf);
- GST_ELEMENT_ERROR (trans, STREAM, NOT_IMPLEMENTED,
- ("subclass did not specify output size"),
- ("subclass did not specify output size"));
- return GST_FLOW_ERROR;
- }
no_buffer:
{
gst_buffer_unref (inbuf);
- GST_DEBUG_OBJECT (trans, "could not get buffer from pool");
+ GST_WARNING_OBJECT (trans, "could not get buffer from pool: %s",
+ gst_flow_get_name (ret));
return ret;
}
-configure_failed:
- {
- gst_buffer_unref (inbuf);
- GST_DEBUG_OBJECT (trans, "could not negotiate");
- return GST_FLOW_NOT_NEGOTIATED;
- }
+}
+
+static gboolean
+gst_base_transform_check_get_range (GstPad * pad)
+{
+ GstBaseTransform *trans;
+ gboolean ret;
+
+ trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
+
+ ret = gst_pad_check_pull_range (trans->sinkpad);
+
+ gst_object_unref (trans);
+
+ return ret;
}
/* FIXME, getrange is broken, need to pull range from the other
ret = gst_pad_pull_range (trans->sinkpad, offset, length, &inbuf);
if (ret == GST_FLOW_OK) {
- g_mutex_lock (trans->transform_lock);
ret = gst_base_transform_handle_buffer (trans, inbuf, buffer);
- g_mutex_unlock (trans->transform_lock);
}
gst_object_unref (trans);
{
GstBaseTransform *trans;
GstFlowReturn ret;
+ GstClockTime last_stop = GST_CLOCK_TIME_NONE;
GstBuffer *outbuf = NULL;
- trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
+ trans = GST_BASE_TRANSFORM (GST_OBJECT_PARENT (pad));
+
+ /* calculate end position of the incoming buffer */
+ if (GST_BUFFER_TIMESTAMP (buffer) != GST_CLOCK_TIME_NONE) {
+ if (GST_BUFFER_DURATION (buffer) != GST_CLOCK_TIME_NONE)
+ last_stop = GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
+ else
+ last_stop = GST_BUFFER_TIMESTAMP (buffer);
+ }
/* protect transform method and concurrent buffer alloc */
- g_mutex_lock (trans->transform_lock);
ret = gst_base_transform_handle_buffer (trans, buffer, &outbuf);
- g_mutex_unlock (trans->transform_lock);
- if (ret == GST_FLOW_OK) {
- ret = gst_pad_push (trans->srcpad, outbuf);
- } else if (outbuf != NULL)
- gst_buffer_unref (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)) {
+ /* Remember last stop position */
+ if ((last_stop != GST_CLOCK_TIME_NONE) &&
+ (trans->segment.format == GST_FORMAT_TIME))
+ gst_segment_set_last_stop (&trans->segment, GST_FORMAT_TIME, last_stop);
+
+ /* apply DISCONT flag if the buffer is not yet marked as such */
+ if (trans->priv->discont) {
+ if (!GST_BUFFER_IS_DISCONT (outbuf)) {
+ outbuf = gst_buffer_make_metadata_writable (outbuf);
+ GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
+ }
+ trans->priv->discont = FALSE;
+ }
+ ret = gst_pad_push (trans->srcpad, outbuf);
+ } else
+ gst_buffer_unref (outbuf);
+ }
- gst_object_unref (trans);
+ /* convert internal flow to OK and mark discont for the next buffer. */
+ if (ret == GST_BASE_TRANSFORM_FLOW_DROPPED) {
+ trans->priv->discont = TRUE;
+ ret = GST_FLOW_OK;
+ }
return ret;
}
trans = GST_BASE_TRANSFORM (object);
switch (prop_id) {
+ case PROP_QOS:
+ gst_base_transform_set_qos_enabled (trans, g_value_get_boolean (value));
+ break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
trans = GST_BASE_TRANSFORM (object);
switch (prop_id) {
+ case PROP_QOS:
+ g_value_set_boolean (value, gst_base_transform_is_qos_enabled (trans));
+ break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
+/* not a vmethod of anything, just an internal method */
static gboolean
-gst_base_transform_sink_activate_push (GstPad * pad, gboolean active)
+gst_base_transform_activate (GstBaseTransform * trans, gboolean active)
{
- gboolean result = TRUE;
- GstBaseTransform *trans;
GstBaseTransformClass *bclass;
+ gboolean result = TRUE;
- trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (active) {
- if (bclass->start)
- result = bclass->start (trans);
+ if (trans->priv->pad_mode == GST_ACTIVATE_NONE && bclass->start)
+ result &= bclass->start (trans);
+
+ GST_OBJECT_LOCK (trans);
+
+ if (GST_PAD_CAPS (trans->sinkpad) && GST_PAD_CAPS (trans->srcpad))
+ trans->have_same_caps =
+ gst_caps_is_equal (GST_PAD_CAPS (trans->sinkpad),
+ GST_PAD_CAPS (trans->srcpad)) || trans->passthrough;
+ else
+ trans->have_same_caps = trans->passthrough;
+ GST_DEBUG_OBJECT (trans, "have_same_caps %d", trans->have_same_caps);
+ trans->negotiated = FALSE;
+ trans->have_newsegment = FALSE;
+ gst_segment_init (&trans->segment, GST_FORMAT_UNDEFINED);
+ trans->priv->proportion = 1.0;
+ trans->priv->earliest_time = -1;
+ trans->priv->discont = FALSE;
+ gst_caps_replace (&trans->priv->sink_suggest, NULL);
+
+ GST_OBJECT_UNLOCK (trans);
+ } else {
+ /* We must make sure streaming has finished before resetting things
+ * and calling the ::stop vfunc */
+ GST_PAD_STREAM_LOCK (trans->sinkpad);
+ GST_PAD_STREAM_UNLOCK (trans->sinkpad);
+
+ trans->have_same_caps = FALSE;
+ /* 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 (&trans->cache_caps1, NULL);
+ gst_caps_replace (&trans->cache_caps2, NULL);
+ gst_caps_replace (&trans->priv->sink_alloc, NULL);
+ gst_caps_replace (&trans->priv->sink_suggest, NULL);
+
+ if (trans->priv->pad_mode != GST_ACTIVATE_NONE && bclass->stop)
+ result &= bclass->stop (trans);
}
- gst_object_unref (trans);
return result;
}
static gboolean
-gst_base_transform_src_activate_pull (GstPad * pad, gboolean active)
+gst_base_transform_sink_activate_push (GstPad * pad, gboolean active)
{
- gboolean result = FALSE;
+ gboolean result = TRUE;
GstBaseTransform *trans;
- GstBaseTransformClass *bclass;
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
- bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
- result = gst_pad_activate_pull (trans->sinkpad, active);
+ result = gst_base_transform_activate (trans, active);
+
+ if (result)
+ trans->priv->pad_mode = active ? GST_ACTIVATE_PUSH : GST_ACTIVATE_NONE;
- if (active) {
- if (result && bclass->start)
- result &= bclass->start (trans);
- }
gst_object_unref (trans);
return result;
}
-static GstStateChangeReturn
-gst_base_transform_change_state (GstElement * element,
- GstStateChange transition)
+static gboolean
+gst_base_transform_src_activate_pull (GstPad * pad, gboolean active)
{
+ gboolean result = FALSE;
GstBaseTransform *trans;
- GstBaseTransformClass *bclass;
- GstStateChangeReturn result;
- trans = GST_BASE_TRANSFORM (element);
- bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
+ trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
+ result = gst_pad_activate_pull (trans->sinkpad, active);
- switch (transition) {
- case GST_STATE_CHANGE_NULL_TO_READY:
- break;
- case GST_STATE_CHANGE_READY_TO_PAUSED:
- GST_OBJECT_LOCK (trans);
- if (GST_PAD_CAPS (trans->sinkpad) && GST_PAD_CAPS (trans->srcpad))
- trans->have_same_caps =
- gst_caps_is_equal (GST_PAD_CAPS (trans->sinkpad),
- GST_PAD_CAPS (trans->srcpad)) || trans->passthrough;
- else
- trans->have_same_caps = trans->passthrough;
- GST_DEBUG_OBJECT (trans, "have_same_caps %d", trans->have_same_caps);
- trans->negotiated = FALSE;
- trans->have_newsegment = FALSE;
- gst_segment_init (&trans->segment, GST_FORMAT_UNDEFINED);
- GST_OBJECT_UNLOCK (trans);
- break;
- case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
- break;
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- gst_caps_replace (&trans->cache_caps1, NULL);
- gst_caps_replace (&trans->cache_caps2, NULL);
- default:
- break;
- }
+ if (result)
+ result &= gst_base_transform_activate (trans, active);
- result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+ if (result)
+ trans->priv->pad_mode = active ? GST_ACTIVATE_PULL : GST_ACTIVATE_NONE;
- switch (transition) {
- case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
- break;
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- if (bclass->stop)
- result = bclass->stop (trans);
- break;
- case GST_STATE_CHANGE_READY_TO_NULL:
- break;
- default:
- break;
- }
+ gst_object_unref (trans);
return result;
}
{
GstBaseTransformClass *bclass;
- g_return_if_fail (trans != NULL);
+ g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
{
gboolean result;
- g_return_val_if_fail (trans != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_BASE_TRANSFORM (trans), FALSE);
GST_OBJECT_LOCK (trans);
result = trans->passthrough;
* to the transform_ip function.
* <itemizedlist>
* <listitem>Always TRUE if no transform function is implemented.</listitem>
- * <listitem>Always FALSE if ONLY transform_ip function is implemented.</listitem>
+ * <listitem>Always FALSE if ONLY transform function is implemented.</listitem>
* </itemizedlist>
*
* MT safe.
{
GstBaseTransformClass *bclass;
- g_return_if_fail (trans != NULL);
+ g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
{
gboolean result;
- g_return_val_if_fail (trans != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_BASE_TRANSFORM (trans), FALSE);
GST_OBJECT_LOCK (trans);
result = trans->always_in_place;
return result;
}
+
+/**
+ * gst_base_transform_update_qos:
+ * @trans: a #GstBaseTransform
+ * @proportion: the proportion
+ * @diff: the diff against the clock
+ * @timestamp: the timestamp of the buffer generating the QoS expressed in
+ * running_time.
+ *
+ * Set the QoS parameters in the transform. This function is called internally
+ * when a QOS event is received but subclasses can provide custom information
+ * when needed.
+ *
+ * Since: 0.10.5
+ *
+ * MT safe.
+ */
+void
+gst_base_transform_update_qos (GstBaseTransform * trans,
+ gdouble proportion, GstClockTimeDiff diff, GstClockTime timestamp)
+{
+
+ g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
+
+ GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, trans,
+ "qos: proportion: %lf, diff %" G_GINT64_FORMAT ", timestamp %"
+ GST_TIME_FORMAT, proportion, diff, GST_TIME_ARGS (timestamp));
+
+ GST_OBJECT_LOCK (trans);
+ trans->priv->proportion = proportion;
+ trans->priv->earliest_time = timestamp + diff;
+ GST_OBJECT_UNLOCK (trans);
+}
+
+/**
+ * gst_base_transform_set_qos_enabled:
+ * @trans: a #GstBaseTransform
+ * @enabled: new state
+ *
+ * Enable or disable QoS handling in the transform.
+ *
+ * Since: 0.10.5
+ *
+ * MT safe.
+ */
+void
+gst_base_transform_set_qos_enabled (GstBaseTransform * trans, gboolean enabled)
+{
+ g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
+
+ GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, trans, "enabled: %d", enabled);
+
+ GST_OBJECT_LOCK (trans);
+ trans->priv->qos_enabled = enabled;
+ GST_OBJECT_UNLOCK (trans);
+}
+
+/**
+ * gst_base_transform_is_qos_enabled:
+ * @trans: a #GstBaseTransform
+ *
+ * Queries if the transform will handle QoS.
+ *
+ * Returns: TRUE if QoS is enabled.
+ *
+ * Since: 0.10.5
+ *
+ * MT safe.
+ */
+gboolean
+gst_base_transform_is_qos_enabled (GstBaseTransform * trans)
+{
+ gboolean result;
+
+ g_return_val_if_fail (GST_IS_BASE_TRANSFORM (trans), FALSE);
+
+ GST_OBJECT_LOCK (trans);
+ result = trans->priv->qos_enabled;
+ GST_OBJECT_UNLOCK (trans);
+
+ return result;
+}
+
+/**
+ * gst_base_transform_set_gap_aware:
+ * @trans: a #GstBaseTransform
+ * @gap_aware: New state
+ *
+ * If @gap_aware is %FALSE (the default), output buffers will have the
+ * %GST_BUFFER_FLAG_GAP flag unset.
+ *
+ * If set to %TRUE, the element must handle output buffers with this flag set
+ * correctly, i.e. it can assume that the buffer contains neutral data but must
+ * unset the flag if the output is no neutral data.
+ *
+ * Since: 0.10.16
+ *
+ * MT safe.
+ */
+void
+gst_base_transform_set_gap_aware (GstBaseTransform * trans, gboolean gap_aware)
+{
+ g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
+
+ GST_OBJECT_LOCK (trans);
+ trans->priv->gap_aware = gap_aware;
+ GST_DEBUG_OBJECT (trans, "set gap aware %d", trans->priv->gap_aware);
+ GST_OBJECT_UNLOCK (trans);
+}
+
+/**
+ * gst_base_transform_suggest:
+ * @trans: a #GstBaseTransform
+ * @gcaps: caps to suggest
+ *
+ * Instructs @trans to suggest new @caps upstream.
+ *
+ * Since: 0.10.21
+ */
+void
+gst_base_transform_suggest (GstBaseTransform * trans, GstCaps * caps,
+ guint size)
+{
+ g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
+
+ GST_OBJECT_LOCK (trans->sinkpad);
+ if (trans->priv->sink_suggest)
+ gst_caps_unref (trans->priv->sink_suggest);
+ trans->priv->sink_suggest = gst_caps_copy (caps);
+ trans->priv->size_suggest = size;
+ gst_caps_replace (&trans->priv->sink_alloc, NULL);
+ GST_DEBUG_OBJECT (trans, "new suggest %" GST_PTR_FORMAT, caps);
+ GST_OBJECT_UNLOCK (trans->sinkpad);
+}
+
+#if 0
+/**
+ * gst_base_transform_reconfigure:
+ * @trans: a #GstBaseTransform
+ *
+ * Instructs @trans to renegotiate a new downstream transform on the next
+ * buffer.
+ *
+ * Note: Not yet implemented.
+ *
+ * Since: 0.10.21
+ */
+void
+gst_base_transform_reconfigure (GstBaseTransform * trans)
+{
+}
+#endif
projects / platform / upstream / gstreamer.git / blobdiff