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gstreamer/libs/gst/base/gstbasetransform.c
Wim Taymans 9a897acec0 gst/gstbus.c: Small documentation clarification about the signal watch. 
Original commit message from CVS:
* gst/gstbus.c:
Small documentation clarification about the signal watch.
* libs/gst/base/gstbasesink.c: (gst_base_sink_get_sync_times),
(gst_base_sink_wait_clock), (gst_base_sink_do_sync),
(gst_base_sink_perform_qos), (gst_base_sink_reset_qos),
(gst_base_sink_do_render_stats), (gst_base_sink_render_object),
(gst_base_sink_get_position_last),
(gst_base_sink_get_position_paused), (gst_base_sink_change_state):
Convert and store timestamps in stream time and running time, the
raw timestamps are not usefull, also document this better.
Use different window sizes for good and bad QoS observations so
we react to badness a little quicker.
Keep track of the amount of rendered and dropped buffers.
Send QoS timestamps in running time.
* libs/gst/base/gstbasetransform.c:
(gst_base_transform_sink_eventfunc),
(gst_base_transform_handle_buffer):
Compare QoS timestamps against running time.
2006-04-07 14:02:12 +00:00

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/* 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>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gstbasetransform
* @short_description: Base class for simple transform filters
* @see_also: #GstBaseSrc, #GstBaseSink
*
* This base class is for filter elements that process data.
*
* 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>
*
* Use Cases:
* <orderedlist>
* <listitem>
* <itemizedlist><title>Passthrough mode</title>
* <listitem><para>
* 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
* 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>
*
* <itemizedlist><title>Sub-class settable flags on GstBaseTransform</title>
* <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>
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include "../../../gst/gst_private.h"
#include "../../../gst/gst-i18n-lib.h"
#include "gstbasetransform.h"
#include <gst/gstmarshal.h>
GST_DEBUG_CATEGORY_STATIC (gst_base_transform_debug);
#define GST_CAT_DEFAULT gst_base_transform_debug
/* BaseTransform signals and args */
enum
{
/* FILL ME */
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;
};
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_buffer (GstBaseTransform
* trans, GstBuffer * input, gint size, GstCaps * caps, GstBuffer ** buf);
GType
gst_base_transform_get_type (void)
{
static GType base_transform_type = 0;
if (!base_transform_type) {
static const GTypeInfo base_transform_info = {
sizeof (GstBaseTransformClass),
(GBaseInitFunc) gst_base_transform_base_init,
NULL,
(GClassInitFunc) gst_base_transform_class_init,
NULL,
NULL,
sizeof (GstBaseTransform),
0,
(GInstanceInitFunc) gst_base_transform_init,
};
base_transform_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstBaseTransform", &base_transform_info, G_TYPE_FLAG_ABSTRACT);
}
return base_transform_type;
}
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);
static void gst_base_transform_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_base_transform_src_activate_pull (GstPad * pad,
gboolean active);
static gboolean gst_base_transform_sink_activate_push (GstPad * pad,
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_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 GstFlowReturn gst_base_transform_getrange (GstPad * pad, guint64 offset,
guint length, GstBuffer ** buffer);
static GstFlowReturn gst_base_transform_chain (GstPad * pad,
GstBuffer * buffer);
static GstCaps *gst_base_transform_getcaps (GstPad * pad);
static gboolean gst_base_transform_setcaps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_base_transform_buffer_alloc (GstPad * pad,
guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
/* 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);
g_mutex_free (trans->transform_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
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);
g_type_class_add_private (klass, sizeof (GstBaseTransformPrivate));
parent_class = g_type_class_peek_parent (klass);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_base_transform_set_property);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_base_transform_get_property);
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_QOS,
g_param_spec_boolean ("qos", "QoS", "handle QoS messages",
DEFAULT_PROP_QOS, G_PARAM_READWRITE));
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_transform_finalize);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_base_transform_change_state);
klass->passthrough_on_same_caps = FALSE;
klass->event = GST_DEBUG_FUNCPTR (gst_base_transform_sink_eventfunc);
klass->src_event = GST_DEBUG_FUNCPTR (gst_base_transform_src_eventfunc);
}
static void
gst_base_transform_init (GstBaseTransform * trans,
GstBaseTransformClass * bclass)
{
GstPadTemplate *pad_template;
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);
trans->sinkpad = gst_pad_new_from_template (pad_template, "sink");
gst_pad_set_getcaps_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_getcaps));
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_sink_event));
gst_pad_set_chain_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_chain));
gst_pad_set_activatepush_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_sink_activate_push));
gst_pad_set_bufferalloc_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_buffer_alloc));
gst_element_add_pad (GST_ELEMENT (trans), trans->sinkpad);
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
g_return_if_fail (pad_template != NULL);
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_getrange_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_getrange));
gst_pad_set_activatepull_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_src_activate_pull));
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->passthrough = FALSE;
if (bclass->transform == NULL) {
/* If no transform function, always_in_place is TRUE */
GST_DEBUG_OBJECT (trans, "setting in_place TRUE");
trans->always_in_place = TRUE;
if (bclass->transform_ip == NULL)
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;
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
/* if there is a custom transform function, use this */
if (klass->transform_caps) {
GstCaps *temp;
gint i;
/* start with empty caps */
ret = gst_caps_new_empty ();
if (gst_caps_is_any (caps)) {
/* for any caps we still have to call the transform function */
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
* function as this is easier for the element */
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstCaps *nth;
nth = gst_caps_copy_nth (caps, i);
GST_DEBUG_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);
temp = gst_caps_make_writable (temp);
gst_caps_append (ret, temp);
}
}
} else {
/* else use the identity transform */
ret = gst_caps_ref (caps);
}
GST_DEBUG_OBJECT (trans, "to: %" GST_PTR_FORMAT, ret);
return ret;
}
static gboolean
gst_base_transform_transform_size (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps,
guint size, GstCaps * othercaps, guint * othersize)
{
guint inunitsize, outunitsize, units;
GstBaseTransformClass *klass;
gboolean ret;
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
GST_DEBUG_OBJECT (trans, "asked to transform size %d for caps %"
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) {
ret = klass->transform_size (trans, direction, caps, size, othercaps,
othersize);
} else {
if (!gst_base_transform_get_unit_size (trans, caps, &inunitsize))
goto no_in_size;
GST_DEBUG_OBJECT (trans, "input size %d, input unit size %d", size,
inunitsize);
if (inunitsize == 0 || (size % inunitsize != 0))
goto no_multiple;
units = size / inunitsize;
if (!gst_base_transform_get_unit_size (trans, othercaps, &outunitsize))
goto no_out_size;
*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 ("could not get in_size");
return FALSE;
}
no_multiple:
{
GST_DEBUG_OBJECT (trans, "Size %u is not a multiple of unit size %u", size,
inunitsize);
g_warning ("Size %u is not a multiple of unit size %u", size, inunitsize);
return FALSE;
}
no_out_size:
{
GST_DEBUG_OBJECT (trans, "could not get out_size");
g_warning ("could not get out_size");
return FALSE;
}
}
static GstCaps *
gst_base_transform_getcaps (GstPad * pad)
{
GstBaseTransform *trans;
GstPad *otherpad;
GstCaps *caps;
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
/* we can do what the peer can */
caps = gst_pad_peer_get_caps (otherpad);
if (caps) {
GstCaps *temp;
const GstCaps *templ;
GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, caps);
/* filtered against our padtemplate */
templ = gst_pad_get_pad_template_caps (otherpad);
GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, templ);
temp = gst_caps_intersect (caps, templ);
GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
gst_caps_unref (caps);
/* then see what we can transform this to */
caps = gst_base_transform_transform_caps (trans,
GST_PAD_DIRECTION (otherpad), temp);
GST_DEBUG_OBJECT (pad, "transformed %" GST_PTR_FORMAT, caps);
gst_caps_unref (temp);
if (caps == NULL)
goto done;
/* and filter against the template again */
templ = gst_pad_get_pad_template_caps (pad);
GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, templ);
temp = gst_caps_intersect (caps, templ);
GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
gst_caps_unref (caps);
/* this is what we can do */
caps = temp;
} else {
/* no peer, our padtemplate is enough then */
caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
}
done:
GST_DEBUG_OBJECT (trans, "returning %" GST_PTR_FORMAT, caps);
gst_object_unref (trans);
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)
{
gboolean ret = TRUE;
GstBaseTransformClass *klass;
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
/* clear the cache */
gst_caps_replace (&trans->cache_caps1, NULL);
gst_caps_replace (&trans->cache_caps2, NULL);
/* 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 */
gst_base_transform_set_in_place (trans,
klass->transform_ip && trans->have_same_caps);
/* Set the passthrough if the class wants passthrough_on_same_caps
* and we have the same caps on each pad */
if (klass->passthrough_on_same_caps)
gst_base_transform_set_passthrough (trans, trans->have_same_caps);
/* now configure the element with the caps */
if (klass->set_caps) {
GST_DEBUG_OBJECT (trans, "Calling set_caps method to setup caps");
ret = klass->set_caps (trans, in, out);
}
trans->negotiated = ret;
return ret;
}
/* called when new caps arrive on the sink or source pad */
static gboolean
gst_base_transform_setcaps (GstPad * pad, GstCaps * caps)
{
GstBaseTransform *trans;
GstBaseTransformClass *klass;
GstPad *otherpad, *otherpeer;
GstCaps *othercaps = NULL;
gboolean ret = TRUE;
gboolean peer_checked = FALSE;
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;
/* caps must be fixed here */
if (!gst_caps_is_fixed (caps))
goto unfixed_caps;
/* see how we can transform the input caps. */
othercaps = gst_base_transform_transform_caps (trans,
GST_PAD_DIRECTION (pad), caps);
/* The caps we can actually output is the intersection of the transformed
* caps with the pad template for the pad */
if (othercaps) {
GstCaps *intersect;
const GstCaps *templ_caps;
templ_caps = gst_pad_get_pad_template_caps (otherpad);
intersect = gst_caps_intersect (othercaps, templ_caps);
gst_caps_unref (othercaps);
othercaps = intersect;
}
/* check if transform is empty */
if (!othercaps || gst_caps_is_empty (othercaps))
goto no_transform;
/* 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. */
if (!gst_caps_is_fixed (othercaps)) {
GstCaps *temp;
GST_DEBUG_OBJECT (trans,
"transform returned non fixed %" GST_PTR_FORMAT, othercaps);
/* see if the target caps are a superset of the source caps, in this
* case we can try to perform passthrough */
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) {
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 */
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);
}
}
/* second attempt at fixation is done by intersecting with
* the peer caps */
if (!gst_caps_is_fixed (othercaps) && otherpeer) {
/* intersect against what the peer can do */
GstCaps *peercaps;
GstCaps *intersect;
GST_DEBUG_OBJECT (trans, "othercaps now %" GST_PTR_FORMAT, othercaps);
peercaps = gst_pad_get_caps (otherpeer);
intersect = gst_caps_intersect (peercaps, othercaps);
gst_caps_unref (peercaps);
gst_caps_unref (othercaps);
othercaps = intersect;
peer_checked = FALSE;
GST_DEBUG_OBJECT (trans,
"filtering against peer yields %" GST_PTR_FORMAT, othercaps);
}
if (gst_caps_is_empty (othercaps))
goto no_transform_possible;
/* third attempt at fixation, call the fixate vmethod and
* ultimately call the pad fixate function. */
if (!gst_caps_is_fixed (othercaps)) {
GstCaps *temp;
GST_DEBUG_OBJECT (trans,
"trying to fixate %" GST_PTR_FORMAT " on pad %s:%s",
othercaps, GST_DEBUG_PAD_NAME (otherpad));
/* since we have no other way to fixate left, we might as well just take
* the first of the caps list and fixate that */
/* FIXME: when fixating using the vmethod, it might make sense to fixate
* each of the caps; but Wim doesn't see a use case for that yet */
temp = gst_caps_copy_nth (othercaps, 0);
gst_caps_unref (othercaps);
othercaps = temp;
peer_checked = FALSE;
if (klass->fixate_caps) {
GST_DEBUG_OBJECT (trans, "trying to fixate %" GST_PTR_FORMAT
" using caps %" GST_PTR_FORMAT
" on pad %s:%s using fixate_caps vmethod", othercaps, caps,
GST_DEBUG_PAD_NAME (otherpad));
klass->fixate_caps (trans, GST_PAD_DIRECTION (pad), caps, othercaps);
}
/* if still not fixed, no other option but to let the default pad fixate
* function do its job */
if (!gst_caps_is_fixed (othercaps)) {
GST_DEBUG_OBJECT (trans, "trying to fixate %" GST_PTR_FORMAT
" on pad %s:%s using gst_pad_fixate_caps", othercaps,
GST_DEBUG_PAD_NAME (otherpad));
gst_pad_fixate_caps (otherpad, othercaps);
}
GST_DEBUG_OBJECT (trans, "after fixating %" GST_PTR_FORMAT, othercaps);
}
/* caps should be fixed now, if not we have to fail. */
if (!gst_caps_is_fixed (othercaps))
goto could_not_fixate;
/* and peer should accept, don't check again if we already checked the
* othercaps against the peer. */
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);
trans->have_same_caps = gst_caps_is_equal (caps, othercaps);
GST_DEBUG_OBJECT (trans, "have_same_caps: %d", trans->have_same_caps);
/* see if we have to configure the element now */
if (!trans->delay_configure) {
GstCaps *incaps, *outcaps;
/* 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;
} else {
/* set pending configure, the configure will happen later with the
* caps we set on the pads above. */
trans->pending_configure = TRUE;
}
/* we know this will work, we implement the setcaps */
gst_pad_set_caps (otherpad, othercaps);
done:
if (otherpeer)
gst_object_unref (otherpeer);
if (othercaps)
gst_caps_unref (othercaps);
trans->negotiated = ret;
gst_object_unref (trans);
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,
"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
" to accept %" GST_PTR_FORMAT, otherpad, othercaps);
ret = FALSE;
goto done;
}
}
/* Allocate a buffer using gst_pad_alloc_buffer
*
* This function does not do renegotiation on the source pad
*/
static GstFlowReturn
gst_base_transform_prepare_output_buffer (GstBaseTransform * trans,
GstBuffer * in_buf, gint out_size, GstCaps * out_caps, GstBuffer ** out_buf)
{
GstBaseTransformClass *bclass;
GstFlowReturn ret = GST_FLOW_OK;
gboolean copy_inbuf = FALSE;
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 */
if (bclass->prepare_output_buffer) {
ret =
bclass->prepare_output_buffer (trans, in_buf, out_size, out_caps,
out_buf);
if (ret != GST_FLOW_OK)
goto done;
}
/* 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);
}
goto done;
} else {
/* Make a writable buffer below and copy the data */
copy_inbuf = TRUE;
}
}
if (*out_buf == NULL) {
/* Sub-class didn't already provide a buffer for us. Make one */
ret = gst_pad_alloc_buffer (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 */
gst_buffer_unref (*out_buf);
*out_buf = gst_buffer_new_and_alloc (out_size);
gst_buffer_set_caps (*out_buf, out_caps);
}
}
/* If the output buffer metadata is modifiable, copy timestamps and
* buffer flags */
if (*out_buf != in_buf && gst_buffer_is_metadata_writable (*out_buf)) {
if (copy_inbuf && gst_buffer_is_writable (*out_buf))
memcpy (GST_BUFFER_DATA (*out_buf), GST_BUFFER_DATA (in_buf), out_size);
gst_buffer_stamp (*out_buf, in_buf);
GST_BUFFER_FLAGS (*out_buf) |= GST_BUFFER_FLAGS (in_buf) &
(GST_BUFFER_FLAG_PREROLL | GST_BUFFER_FLAG_DISCONT |
GST_BUFFER_FLAG_IN_CAPS | GST_BUFFER_FLAG_DELTA_UNIT);
}
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)
{
gboolean res = FALSE;
GstBaseTransformClass *bclass;
/* see if we have the result cached */
if (trans->cache_caps1 == caps) {
*size = trans->cache_caps1_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, "returned %d from second cached", *size);
return TRUE;
}
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (bclass->get_unit_size) {
res = bclass->get_unit_size (trans, caps, size);
GST_DEBUG_OBJECT (trans, "caps %" GST_PTR_FORMAT
") 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_OBJECT (trans, "Sub-class does not implement get_unit_size");
}
return res;
}
/* your upstream peer wants to send you a buffer
* that buffer has the given offset, size and caps
* you're requested to allocate a buffer
*/
static GstFlowReturn
gst_base_transform_buffer_alloc (GstPad * pad, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
{
GstBaseTransform *trans;
GstFlowReturn res;
guint new_size;
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
/* 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);
*buf = NULL;
GST_DEBUG_OBJECT (trans, "allocating a buffer of size %d ...", size);
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);
} 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);
}
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;
}
res =
gst_pad_alloc_buffer_and_set_caps (trans->srcpad, offset, new_size,
srccaps, buf);
gst_caps_unref (srccaps);
}
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;
}
gst_buffer_unref (*buf);
*buf = gst_buffer_new_and_alloc (new_size);
gst_buffer_set_caps (*buf, sinkcaps);
GST_BUFFER_OFFSET (*buf) = offset;
res = GST_FLOW_OK;
gst_caps_unref (srccaps);
gst_caps_unref (sinkcaps);
}
done:
g_mutex_unlock (trans->transform_lock);
gst_object_unref (trans);
return res;
not_configured:
{
/* let the default allocator handle it */
GST_DEBUG_OBJECT (trans, "not configured");
gst_buffer_replace (buf, NULL);
res = GST_FLOW_OK;
goto done;
}
unknown_size:
{
/* let the default allocator handle it */
GST_DEBUG_OBJECT (trans, "unknown size");
gst_buffer_replace (buf, NULL);
res = GST_FLOW_OK;
goto done;
}
}
static gboolean
gst_base_transform_sink_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->event)
ret = bclass->event (trans, event);
/* FIXME, do this in the default event handler so the subclass can do
* something different. */
if (ret)
ret = gst_pad_push_event (trans->srcpad, event);
gst_object_unref (trans);
return ret;
}
static gboolean
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;
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:
break;
case GST_EVENT_TAG:
break;
case GST_EVENT_NEWSEGMENT:
{
GstFormat format;
gdouble rate;
gint64 start, stop, time;
gboolean update;
gst_event_parse_new_segment (event, &update, &rate, &format, &start,
&stop, &time);
if (trans->segment.format != format)
gst_segment_init (&trans->segment, format);
gst_segment_set_newsegment (&trans->segment, update, rate, format, start,
stop, time);
trans->have_newsegment = TRUE;
if (format == GST_FORMAT_TIME) {
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),
GST_TIME_ARGS (trans->segment.stop),
GST_TIME_ARGS (trans->segment.time),
GST_TIME_ARGS (trans->segment.accum));
} else {
GST_DEBUG_OBJECT (trans, "received NEW_SEGMENT %" G_GINT64_FORMAT
" -- %" G_GINT64_FORMAT ", time %" G_GINT64_FORMAT
", accum %" G_GINT64_FORMAT,
trans->segment.start, trans->segment.stop,
trans->segment.time, trans->segment.accum);
}
break;
}
default:
break;
}
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, &timestamp);
gst_base_transform_update_qos (trans, proportion, diff, timestamp);
break;
}
default:
break;
}
ret = gst_pad_push_event (trans->sinkpad, event);
return ret;
}
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 %"
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",
inbuf, GST_BUFFER_SIZE (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
* care about caps)
*/
if (!trans->negotiated && !trans->passthrough && (bclass->set_caps != NULL))
goto not_negotiated;
/* can only do QoS if the segment is in TIME */
if (trans->segment.format != GST_FORMAT_TIME)
goto no_qos;
qostime = gst_segment_to_running_time (&trans->segment, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (inbuf));
if (qostime != -1) {
gboolean need_skip;
GstClockTime earliest_time;
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));
goto skip;
}
}
no_qos:
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;
}
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_buffer (trans, inbuf,
GST_BUFFER_SIZE (inbuf), GST_PAD_CAPS (trans->srcpad), outbuf);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto no_buffer;
ret = bclass->transform_ip (trans, *outbuf);
} else {
GST_LOG_OBJECT (trans, "doing non-inplace transform");
/* not transforming inplace, figure out the output size */
if (trans->always_in_place) {
out_size = GST_BUFFER_SIZE (inbuf);
} 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;
}
}
/* no in place transform, get buffer, this might renegotiate. */
ret = gst_base_transform_prepare_output_buffer (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));
trans->pending_configure = FALSE;
if (!success)
goto configure_failed;
}
skip:
gst_buffer_unref (inbuf);
return ret;
/* ERRORS */
not_negotiated:
{
gst_buffer_unref (inbuf);
GST_ELEMENT_ERROR (trans, STREAM, NOT_IMPLEMENTED,
("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: %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;
}
}
/* FIXME, getrange is broken, need to pull range from the other
* end based on the transform_size result.
*/
static GstFlowReturn
gst_base_transform_getrange (GstPad * pad, guint64 offset,
guint length, GstBuffer ** buffer)
{
GstBaseTransform *trans;
GstFlowReturn ret;
GstBuffer *inbuf;
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
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);
return ret;
}
static GstFlowReturn
gst_base_transform_chain (GstPad * pad, GstBuffer * buffer)
{
GstBaseTransform *trans;
GstFlowReturn ret;
GstBuffer *outbuf = NULL;
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
/* 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);
/* outbuf can be NULL, this means a dropped buffer */
if (outbuf != NULL) {
if (ret == GST_FLOW_OK)
ret = gst_pad_push (trans->srcpad, outbuf);
else
gst_buffer_unref (outbuf);
}
gst_object_unref (trans);
return ret;
}
static void
gst_base_transform_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstBaseTransform *trans;
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;
}
}
static void
gst_base_transform_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstBaseTransform *trans;
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;
}
}
static gboolean
gst_base_transform_sink_activate_push (GstPad * pad, gboolean active)
{
gboolean result = TRUE;
GstBaseTransform *trans;
GstBaseTransformClass *bclass;
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);
}
gst_object_unref (trans);
return result;
}
static gboolean
gst_base_transform_src_activate_pull (GstPad * pad, gboolean active)
{
gboolean result = FALSE;
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);
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)
{
GstBaseTransform *trans;
GstBaseTransformClass *bclass;
GstStateChangeReturn result;
trans = GST_BASE_TRANSFORM (element);
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
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);
trans->priv->proportion = 1.0;
trans->priv->earliest_time = -1;
GST_OBJECT_UNLOCK (trans);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
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);
if (bclass->stop)
result = bclass->stop (trans);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return result;
}
/**
* gst_base_transform_set_passthrough:
* @trans: the #GstBaseTransform to set
* @passthrough: boolean indicating passthrough mode.
*
* 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
* or transform_ip method.
*
* MT safe.
*/
void
gst_base_transform_set_passthrough (GstBaseTransform * trans,
gboolean passthrough)
{
GstBaseTransformClass *bclass;
g_return_if_fail (trans != NULL);
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
GST_OBJECT_LOCK (trans);
if (passthrough == FALSE) {
if (bclass->transform_ip || bclass->transform)
trans->passthrough = FALSE;
} else {
trans->passthrough = TRUE;
}
GST_DEBUG_OBJECT (trans, "set passthrough %d", trans->passthrough);
GST_OBJECT_UNLOCK (trans);
}
/**
* gst_base_transform_is_passthrough:
* @trans: the #GstBaseTransform to query
*
* See if @trans is configured as a passthrough transform.
*
* Returns: TRUE is the transform is configured in passthrough mode.
*
* MT safe.
*/
gboolean
gst_base_transform_is_passthrough (GstBaseTransform * trans)
{
gboolean result;
g_return_val_if_fail (trans != NULL, FALSE);
GST_OBJECT_LOCK (trans);
result = trans->passthrough;
GST_OBJECT_UNLOCK (trans);
return result;
}
/**
* gst_base_transform_set_in_place:
* @trans: the #GstBaseTransform to modify
* @in_place: Boolean value indicating that we would like to operate
* on in_place buffers.
*
* 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_ip function is implemented.</listitem>
* </itemizedlist>
*
* MT safe.
*/
void
gst_base_transform_set_in_place (GstBaseTransform * trans, gboolean in_place)
{
GstBaseTransformClass *bclass;
g_return_if_fail (trans != NULL);
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
GST_OBJECT_LOCK (trans);
if (in_place) {
if (bclass->transform_ip) {
GST_DEBUG_OBJECT (trans, "setting in_place TRUE");
trans->always_in_place = TRUE;
}
} else {
if (bclass->transform) {
GST_DEBUG_OBJECT (trans, "setting in_place FALSE");
trans->always_in_place = FALSE;
}
}
GST_OBJECT_UNLOCK (trans);
}
/**
* gst_base_transform_is_in_place:
* @trans: the #GstBaseTransform to query
*
* See if @trans is configured as a in_place transform.
*
* Returns: TRUE is the transform is configured in in_place mode.
*
* MT safe.
*/
gboolean
gst_base_transform_is_in_place (GstBaseTransform * trans)
{
gboolean result;
g_return_val_if_fail (trans != NULL, FALSE);
GST_OBJECT_LOCK (trans);
result = trans->always_in_place;
GST_OBJECT_UNLOCK (trans);
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
*
* Set the QoS parameters in the transform.
*
* Since: 0.10.5
*
* MT safe.
*/
void
gst_base_transform_update_qos (GstBaseTransform * trans,
gdouble proportion, GstClockTimeDiff diff, GstClockTime timestamp)
{
g_return_if_fail (trans != NULL);
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 (trans != NULL);
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 (trans != NULL, FALSE);
GST_OBJECT_LOCK (trans);
result = trans->priv->qos_enabled;
GST_OBJECT_UNLOCK (trans);
return result;
}
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