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Original commit message from CVS: 2005-09-02 Andy Wingo <wingo@pobox.com> * gst/gstelement.h (GstState): Renamed from GstElementState, changed to be a normal enum instead of flags. (GstStateChangeReturn): Renamed from GstElementStateReturn, names munged to be GST_STATE_CHANGE_*. (GST_STATE_CHANGE): Renamed from GST_STATE_TRANSITION, updated to work with the new state representation. (GstStateChange): New enumeration of possible state transitions. Replaces GST_STATE_FOO_TO_BAR with GST_STATE_CHANGE_FOO_TO_BAR. (GstElementClass::change_state): Pass the GstStateChange along as an argument. Helps language bindings, so they don't have to use tricky lock-needing macros like GST_STATE_CHANGE (). * scripts/update-states (file): New script. Run it on a file to update it for state naming and API changes. Updates files in place. * All files updated for the new API.
1148 lines
34 KiB
C
1148 lines
34 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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* 2005 Wim Taymans <wim@fluendo.com>
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* 2005 Andy Wingo <wingo@fluendo.com>
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* 2005 Thomas Vander Stichele <thomas at apestaart dot org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gstbasetransform
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* @short_description: Base class for simple tranform filters
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* @see_also: #GstBaseSrc, #GstBaseSink
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*
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* This base class is for filter elements that process data.
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*
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* <itemizedlist>
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* <listitem><para>one sinkpad and one srcpad</para></listitem>
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* <listitem><para>
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* possible formats on sink and source pad implemented
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* with custom transform_caps function. By default uses
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* same format on sink and source.
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* </para></listitem>
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* <listitem><para>handles state changes</para></listitem>
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* <listitem><para>does flushing</para></listitem>
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* <listitem><para>push mode</para></listitem>
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* <listitem><para>
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* pull mode if transform can operate on arbitrary data
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* </para></listitem>
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* </itemizedlist>
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*/
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#include <stdlib.h>
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "../gst-i18n-lib.h"
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#include "gstbasetransform.h"
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#include <gst/gstmarshal.h>
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GST_DEBUG_CATEGORY_STATIC (gst_base_transform_debug);
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#define GST_CAT_DEFAULT gst_base_transform_debug
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/* BaseTransform signals and args */
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enum
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{
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SIGNAL_HANDOFF,
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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PROP_0,
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};
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static GstElementClass *parent_class = NULL;
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static void gst_base_transform_base_init (gpointer g_class);
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static void gst_base_transform_class_init (GstBaseTransformClass * klass);
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static void gst_base_transform_init (GstBaseTransform * trans,
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gpointer g_class);
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GType
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gst_base_transform_get_type (void)
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{
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static GType base_transform_type = 0;
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if (!base_transform_type) {
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static const GTypeInfo base_transform_info = {
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sizeof (GstBaseTransformClass),
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(GBaseInitFunc) gst_base_transform_base_init,
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NULL,
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(GClassInitFunc) gst_base_transform_class_init,
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NULL,
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NULL,
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sizeof (GstBaseTransform),
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0,
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(GInstanceInitFunc) gst_base_transform_init,
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};
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base_transform_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstBaseTransform", &base_transform_info, G_TYPE_FLAG_ABSTRACT);
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}
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return base_transform_type;
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}
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static void gst_base_transform_finalize (GObject * object);
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static void gst_base_transform_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_base_transform_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_base_transform_src_activate_pull (GstPad * pad,
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gboolean active);
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static gboolean gst_base_transform_sink_activate_push (GstPad * pad,
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gboolean active);
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static gboolean gst_base_transform_get_unit_size (GstBaseTransform * trans,
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GstCaps * caps, guint * size);
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static GstStateChangeReturn gst_base_transform_change_state (GstElement *
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element, GstStateChange transition);
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static gboolean gst_base_transform_event (GstPad * pad, GstEvent * event);
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static GstFlowReturn gst_base_transform_getrange (GstPad * pad, guint64 offset,
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guint length, GstBuffer ** buffer);
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static GstFlowReturn gst_base_transform_chain (GstPad * pad,
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GstBuffer * buffer);
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static GstCaps *gst_base_transform_getcaps (GstPad * pad);
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static gboolean gst_base_transform_setcaps (GstPad * pad, GstCaps * caps);
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static GstFlowReturn gst_base_transform_buffer_alloc (GstPad * pad,
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guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
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/* static guint gst_base_transform_signals[LAST_SIGNAL] = { 0 }; */
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static void
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gst_base_transform_base_init (gpointer g_class)
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{
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GST_DEBUG_CATEGORY_INIT (gst_base_transform_debug, "basetransform", 0,
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"basetransform element");
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}
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static void
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gst_base_transform_finalize (GObject * object)
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{
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_base_transform_class_init (GstBaseTransformClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = G_OBJECT_CLASS (klass);
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gstelement_class = GST_ELEMENT_CLASS (klass);
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parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
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gobject_class->set_property =
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GST_DEBUG_FUNCPTR (gst_base_transform_set_property);
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gobject_class->get_property =
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GST_DEBUG_FUNCPTR (gst_base_transform_get_property);
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_transform_finalize);
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_base_transform_change_state);
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}
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static void
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gst_base_transform_init (GstBaseTransform * trans, gpointer g_class)
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{
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GstPadTemplate *pad_template;
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GST_DEBUG ("gst_base_transform_init");
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink");
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g_return_if_fail (pad_template != NULL);
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trans->sinkpad = gst_pad_new_from_template (pad_template, "sink");
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gst_pad_set_getcaps_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_getcaps));
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gst_pad_set_setcaps_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_setcaps));
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gst_pad_set_event_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_event));
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gst_pad_set_chain_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_chain));
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gst_pad_set_activatepush_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_sink_activate_push));
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gst_pad_set_bufferalloc_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_buffer_alloc));
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gst_element_add_pad (GST_ELEMENT (trans), trans->sinkpad);
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
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g_return_if_fail (pad_template != NULL);
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trans->srcpad = gst_pad_new_from_template (pad_template, "src");
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gst_pad_set_getcaps_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_getcaps));
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gst_pad_set_setcaps_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_setcaps));
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gst_pad_set_getrange_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_getrange));
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gst_pad_set_activatepull_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_src_activate_pull));
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gst_element_add_pad (GST_ELEMENT (trans), trans->srcpad);
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trans->passthrough = FALSE;
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trans->delay_configure = FALSE;
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trans->pending_configure = FALSE;
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trans->cache_caps1 = NULL;
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trans->cache_caps2 = NULL;
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}
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static GstCaps *
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gst_base_transform_transform_caps (GstBaseTransform * trans,
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GstPadDirection direction, GstCaps * caps)
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{
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GstCaps *ret;
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GstBaseTransformClass *klass;
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klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
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/* if there is a custom transform function, use this */
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if (klass->transform_caps) {
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GstCaps *temp;
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gint i;
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ret = gst_caps_new_empty ();
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if (gst_caps_is_any (caps)) {
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/* for any caps we still have to call the transform function */
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GST_DEBUG_OBJECT (trans, "from ANY:");
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temp = klass->transform_caps (trans, direction, caps);
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GST_DEBUG_OBJECT (trans, " to: %" GST_PTR_FORMAT, temp);
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gst_caps_append (ret, temp);
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} else {
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/* we send caps with just one structure to the transform
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* function as this is easier for the element */
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for (i = 0; i < gst_caps_get_size (caps); i++) {
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GstCaps *nth;
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nth = gst_caps_copy_nth (caps, i);
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GST_DEBUG_OBJECT (trans, "from[%d]: %" GST_PTR_FORMAT, i, nth);
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temp = klass->transform_caps (trans, direction, nth);
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gst_caps_unref (nth);
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GST_DEBUG_OBJECT (trans, " to[%d]: %" GST_PTR_FORMAT, i, temp);
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gst_caps_append (ret, temp);
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}
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}
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gst_caps_do_simplify (ret);
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} else {
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/* else use the identity transform */
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ret = gst_caps_ref (caps);
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}
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GST_DEBUG_OBJECT (trans, "to: %" GST_PTR_FORMAT, ret);
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return ret;
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}
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static gboolean
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gst_base_transform_transform_size (GstBaseTransform * trans,
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GstPadDirection direction, GstCaps * caps,
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guint size, GstCaps * othercaps, guint * othersize)
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{
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guint inunitsize, outunitsize, units;
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GstBaseTransformClass *klass;
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gint ret = -1;
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klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
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GST_DEBUG_OBJECT (trans, "asked to transform size %d for caps %"
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GST_PTR_FORMAT " to size for caps %" GST_PTR_FORMAT " in direction %s",
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size, caps, othercaps, direction == GST_PAD_SRC ? "SRC" : "SINK");
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/* if there is a custom transform function, use this */
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if (klass->transform_size) {
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ret = klass->transform_size (trans, direction, caps, size, othercaps,
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othersize);
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} else {
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g_return_val_if_fail (gst_base_transform_get_unit_size (trans, caps,
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&inunitsize), FALSE);
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GST_DEBUG_OBJECT (trans, "input size %d, input unit size %d", size,
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inunitsize);
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g_return_val_if_fail (inunitsize != 0, FALSE);
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g_return_val_if_fail (size % inunitsize == 0, FALSE);
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units = size / inunitsize;
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g_return_val_if_fail (gst_base_transform_get_unit_size (trans, othercaps,
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&outunitsize), FALSE);
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*othersize = units * outunitsize;
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GST_DEBUG_OBJECT (trans, "transformed size to %d", *othersize);
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}
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return ret;
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}
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static GstCaps *
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gst_base_transform_getcaps (GstPad * pad)
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{
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GstBaseTransform *trans;
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GstPad *otherpad;
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GstCaps *caps;
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trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
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otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
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/* we can do what the peer can */
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caps = gst_pad_peer_get_caps (otherpad);
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if (caps) {
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GstCaps *temp;
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const GstCaps *templ;
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GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, caps);
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/* filtered against our padtemplate */
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templ = gst_pad_get_pad_template_caps (otherpad);
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GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, templ);
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temp = gst_caps_intersect (caps, templ);
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GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
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gst_caps_unref (caps);
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/* then see what we can tranform this to */
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caps = gst_base_transform_transform_caps (trans,
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GST_PAD_DIRECTION (otherpad), temp);
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GST_DEBUG_OBJECT (pad, "transformed %" GST_PTR_FORMAT, caps);
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gst_caps_unref (temp);
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if (caps == NULL)
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goto done;
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/* and filter against the template again */
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templ = gst_pad_get_pad_template_caps (pad);
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GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, templ);
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temp = gst_caps_intersect (caps, templ);
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GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
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gst_caps_unref (caps);
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/* this is what we can do */
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caps = temp;
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} else {
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/* no peer, our padtemplate is enough then */
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caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
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}
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done:
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GST_DEBUG_OBJECT (trans, "returning %" GST_PTR_FORMAT, caps);
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gst_object_unref (trans);
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return caps;
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}
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static gboolean
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gst_base_transform_configure_caps (GstBaseTransform * trans, GstCaps * in,
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GstCaps * out)
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{
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gboolean ret = TRUE;
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GstBaseTransformClass *klass;
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klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
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/* clear the cache */
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gst_caps_replace (&trans->cache_caps1, NULL);
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gst_caps_replace (&trans->cache_caps2, NULL);
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/* now configure the element with the caps */
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if (klass->set_caps) {
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ret = klass->set_caps (trans, in, out);
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}
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trans->negotiated = ret;
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return ret;
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}
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static gboolean
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gst_base_transform_setcaps (GstPad * pad, GstCaps * caps)
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{
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GstBaseTransform *trans;
|
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GstBaseTransformClass *klass;
|
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GstPad *otherpad, *otherpeer;
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GstCaps *othercaps = NULL;
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gboolean ret = TRUE;
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gboolean peer_checked = FALSE;
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|
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trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
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klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
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otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
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otherpeer = gst_pad_get_peer (otherpad);
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|
|
/* if we get called recursively, we bail out now to avoid an
|
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* infinite loop. */
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if (GST_PAD_IS_IN_SETCAPS (otherpad))
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goto done;
|
|
|
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/* caps must be fixed here */
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if (!gst_caps_is_fixed (caps))
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goto unfixed_caps;
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|
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/* see how we can transform the input caps. */
|
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othercaps = gst_base_transform_transform_caps (trans,
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GST_PAD_DIRECTION (pad), caps);
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|
|
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/* check if transform is empty */
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if (!othercaps || gst_caps_is_empty (othercaps))
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goto no_transform;
|
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|
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/* if the othercaps are not fixed, we need to fixate them, first attempt
|
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* is by attempting passthrough if the othercaps are a superset of caps. */
|
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if (!gst_caps_is_fixed (othercaps)) {
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GstCaps *temp;
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|
|
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GST_DEBUG_OBJECT (trans,
|
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"transform returned non fixed %" GST_PTR_FORMAT, othercaps);
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|
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/* see if the target caps are a superset of the source caps, in this
|
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* case we can try to perform passthrough */
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temp = gst_caps_intersect (othercaps, caps);
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GST_DEBUG_OBJECT (trans, "intersect returned %" GST_PTR_FORMAT, temp);
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if (temp) {
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if (!gst_caps_is_empty (temp) && otherpeer) {
|
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GST_DEBUG_OBJECT (trans, "try passthrough with %" GST_PTR_FORMAT, caps);
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/* try passthrough. we know it's fixed, because caps is fixed */
|
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if (gst_pad_accept_caps (otherpeer, caps)) {
|
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GST_DEBUG_OBJECT (trans, "peer accepted %" GST_PTR_FORMAT, caps);
|
|
/* peer accepted unmodified caps, we free the original non-fixed
|
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* caps and work with the passthrough caps */
|
|
gst_caps_unref (othercaps);
|
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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;
|
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} else {
|
|
GST_DEBUG_OBJECT (trans,
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"peer did not accept %" GST_PTR_FORMAT, caps);
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}
|
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}
|
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gst_caps_unref (temp);
|
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}
|
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}
|
|
|
|
/* second attempt at fixation is done by intersecting with
|
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* the peer caps */
|
|
if (!gst_caps_is_fixed (othercaps) && otherpeer) {
|
|
/* intersect against what the peer can do */
|
|
GstCaps *peercaps;
|
|
GstCaps *intersect;
|
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|
|
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->in_place = gst_caps_is_equal (caps, othercaps);
|
|
GST_DEBUG_OBJECT (trans, "in_place: %d", trans->in_place);
|
|
|
|
/* 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);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
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, "get size returned cached 1 %d", *size);
|
|
return TRUE;
|
|
}
|
|
if (trans->cache_caps2 == caps) {
|
|
*size = trans->cache_caps2_size;
|
|
GST_DEBUG_OBJECT (trans, "get size returned cached 2 %d", *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) {
|
|
if (trans->cache_caps1 == NULL) {
|
|
gst_caps_replace (&trans->cache_caps1, caps);
|
|
trans->cache_caps1_size = *size;
|
|
} else if (trans->cache_caps2 == NULL) {
|
|
gst_caps_replace (&trans->cache_caps2, caps);
|
|
trans->cache_caps2_size = *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 processing data or doing another
|
|
* negotiation in the streaming thread. */
|
|
GST_STREAM_LOCK (pad);
|
|
|
|
*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, in_place is TRUE; allocating can trigger
|
|
* a renegotiation and change that to FALSE */
|
|
if (trans->in_place) {
|
|
/* request a buffer with the same caps */
|
|
GST_DEBUG_OBJECT (trans, "requesting buffer with same caps, size %d", size);
|
|
res = gst_pad_alloc_buffer (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);
|
|
|
|
if (!srccaps)
|
|
goto not_configured;
|
|
|
|
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 (trans->srcpad, offset, new_size, srccaps, buf);
|
|
gst_caps_unref (srccaps);
|
|
}
|
|
|
|
if (res == GST_FLOW_OK && !trans->in_place) {
|
|
/* note that we might have been in place 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);
|
|
}
|
|
GST_STREAM_UNLOCK (pad);
|
|
|
|
gst_object_unref (trans);
|
|
|
|
return res;
|
|
|
|
not_configured:
|
|
{
|
|
/* let the default allocator handle it */
|
|
GST_DEBUG_OBJECT (trans, "not configured");
|
|
if (*buf) {
|
|
gst_buffer_unref (*buf);
|
|
*buf = NULL;
|
|
}
|
|
GST_STREAM_UNLOCK (pad);
|
|
gst_object_unref (trans);
|
|
return GST_FLOW_OK;
|
|
}
|
|
unknown_size:
|
|
{
|
|
/* let the default allocator handle it */
|
|
GST_DEBUG_OBJECT (trans, "unknown size");
|
|
if (*buf) {
|
|
gst_buffer_unref (*buf);
|
|
*buf = NULL;
|
|
}
|
|
GST_STREAM_UNLOCK (pad);
|
|
gst_object_unref (trans);
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_transform_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstBaseTransform *trans;
|
|
GstBaseTransformClass *bclass;
|
|
gboolean ret = FALSE;
|
|
gboolean unlock;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
if (bclass->event)
|
|
bclass->event (trans, event);
|
|
|
|
unlock = FALSE;
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_STREAM_LOCK (pad);
|
|
unlock = TRUE;
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
GST_STREAM_LOCK (pad);
|
|
unlock = TRUE;
|
|
break;
|
|
case GST_EVENT_NEWSEGMENT:
|
|
{
|
|
GstFormat format;
|
|
gdouble rate;
|
|
gint64 start, stop, base;
|
|
|
|
GST_STREAM_LOCK (pad);
|
|
gst_event_parse_newsegment (event, &rate, &format, &start, &stop, &base);
|
|
if (format == GST_FORMAT_TIME) {
|
|
GST_DEBUG_OBJECT (trans, "received NEW_SEGMENT %" GST_TIME_FORMAT
|
|
" -- %" GST_TIME_FORMAT ", base %" GST_TIME_FORMAT,
|
|
start, stop, base);
|
|
trans->have_newsegment = TRUE;
|
|
trans->segment_start = start;
|
|
trans->segment_stop = stop;
|
|
trans->segment_base = base;
|
|
trans->segment_rate = rate;
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans,
|
|
"received NEW_SEGMENT in non-time format, ignoring");
|
|
}
|
|
GST_STREAM_UNLOCK (pad);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
ret = gst_pad_event_default (pad, event);
|
|
if (unlock)
|
|
GST_STREAM_UNLOCK (pad);
|
|
|
|
gst_object_unref (trans);
|
|
|
|
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;
|
|
|
|
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
GST_LOG_OBJECT (trans, "handling buffer %p of size %d ...", inbuf,
|
|
GST_BUFFER_SIZE (inbuf));
|
|
if (GST_BUFFER_OFFSET_IS_VALID (inbuf))
|
|
GST_LOG_OBJECT (trans, "... and offset %" G_GUINT64_FORMAT,
|
|
GST_BUFFER_OFFSET (inbuf));
|
|
else
|
|
GST_LOG_OBJECT (trans, "... and offset NONE");
|
|
|
|
if (!trans->negotiated && !trans->passthrough)
|
|
goto not_negotiated;
|
|
|
|
if (trans->in_place) {
|
|
/* passthrough elements or when the buffer is writable
|
|
* can be performed with the _ip method */
|
|
gboolean may_do_in_place = gst_buffer_is_writable (inbuf) ||
|
|
trans->passthrough;
|
|
|
|
/* check if we can and may do inplace */
|
|
if (bclass->transform_ip && may_do_in_place) {
|
|
/* in place transform and subclass supports method */
|
|
GST_LOG_OBJECT (trans, "doing inplace transform");
|
|
gst_buffer_ref (inbuf);
|
|
|
|
ret = bclass->transform_ip (trans, inbuf);
|
|
*outbuf = inbuf;
|
|
} else {
|
|
GST_LOG_OBJECT (trans, "doing fake inplace transform");
|
|
/* in place transform and subclass does not support method or
|
|
* buffer is not writable. */
|
|
if (bclass->transform) {
|
|
/* make a copy of the buffer. We really need a copy since the
|
|
* element might not be able to really do inplace. */
|
|
*outbuf = inbuf;
|
|
inbuf = gst_buffer_copy (inbuf);
|
|
|
|
ret = bclass->transform (trans, inbuf, *outbuf);
|
|
} else {
|
|
ret = GST_FLOW_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
} else {
|
|
GST_LOG_OBJECT (trans, "doing non-inplace transform");
|
|
/* not inplace, figure out the output size */
|
|
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;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
/* no in place transform, get buffer, this might renegotiate. */
|
|
ret = gst_pad_alloc_buffer (trans->srcpad,
|
|
GST_BUFFER_OFFSET (inbuf), out_size,
|
|
GST_PAD_CAPS (trans->srcpad), outbuf);
|
|
|
|
trans->delay_configure = FALSE;
|
|
|
|
if (ret != GST_FLOW_OK)
|
|
goto no_buffer;
|
|
|
|
gst_buffer_stamp (*outbuf, inbuf);
|
|
|
|
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;
|
|
}
|
|
}
|
|
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");
|
|
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) {
|
|
ret = gst_base_transform_handle_buffer (trans, inbuf, buffer);
|
|
}
|
|
|
|
gst_object_unref (trans);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_base_transform_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstBaseTransform *trans;
|
|
GstFlowReturn ret;
|
|
GstBuffer *outbuf;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
|
|
ret = gst_base_transform_handle_buffer (trans, buffer, &outbuf);
|
|
if (ret == GST_FLOW_OK) {
|
|
ret = gst_pad_push (trans->srcpad, 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) {
|
|
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) {
|
|
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_LOCK (trans);
|
|
if (GST_PAD_CAPS (trans->sinkpad) && GST_PAD_CAPS (trans->srcpad))
|
|
trans->in_place = gst_caps_is_equal (GST_PAD_CAPS (trans->sinkpad),
|
|
GST_PAD_CAPS (trans->srcpad)) || trans->passthrough;
|
|
else
|
|
trans->in_place = trans->passthrough;
|
|
GST_DEBUG_OBJECT (trans, "in_place %d", trans->in_place);
|
|
gst_caps_replace (&trans->cache_caps1, NULL);
|
|
gst_caps_replace (&trans->cache_caps2, NULL);
|
|
trans->negotiated = FALSE;
|
|
GST_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:
|
|
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
|
|
* usefull for filters that do not care about negotiation.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
void
|
|
gst_base_transform_set_passthrough (GstBaseTransform * trans,
|
|
gboolean passthrough)
|
|
{
|
|
g_return_if_fail (trans != NULL);
|
|
|
|
GST_DEBUG_OBJECT (trans, "setting passthrough %d", passthrough);
|
|
|
|
GST_LOCK (trans);
|
|
trans->passthrough = passthrough;
|
|
GST_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_LOCK (trans);
|
|
result = trans->passthrough;
|
|
GST_UNLOCK (trans);
|
|
|
|
return result;
|
|
}
|