gstreamer/gst/debugutils/gstdebugspy.c

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/*
* GStreamer
* Copyright (C) 2005 Thomas Vander Stichele <thomas@apestaart.org>
* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2011 Igalia S.L.
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-debugspy
* @title: debugspy
*
* A spy element that can provide information on buffers going through it, with
* bus messages.
*
* ## Example launch line
* |[
* gst-launch-1.0 -m videotestsrc ! debugspy ! fakesink
* ]|
*
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst.h>
#include "gstdebugspy.h"
GST_DEBUG_CATEGORY_STATIC (gst_debug_spy_debug);
#define GST_CAT_DEFAULT gst_debug_spy_debug
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_SILENT,
PROP_CHECKSUM_TYPE
};
/* create a GType for GChecksumType */
#define GST_DEBUG_SPY_CHECKSUM_TYPE (gst_debug_spy_checksum_get_type())
static GType
gst_debug_spy_checksum_get_type (void)
{
static GType checksum_type = 0;
static const GEnumValue checksum_values[] = {
{G_CHECKSUM_MD5, "Use the MD5 hashing algorithm", "md5"},
{G_CHECKSUM_SHA1, "Use the SHA-1 hashing algorithm", "sha1"},
{G_CHECKSUM_SHA256, "Use the SHA-256 hashing algorithm", "sha256"},
{0, NULL, NULL}
};
if (!checksum_type)
checksum_type = g_enum_register_static ("GChecksumType", checksum_values);
return checksum_type;
}
/* the capabilities of the inputs and outputs.
*
* describe the real formats here.
*/
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("ANY")
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("ANY")
);
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G_DEFINE_TYPE (GstDebugSpy, gst_debug_spy, GST_TYPE_BASE_TRANSFORM);
static void gst_debug_spy_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_debug_spy_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstFlowReturn gst_debug_spy_transform_ip (GstBaseTransform * transform,
GstBuffer * buf);
/* GObject vmethod implementations */
/* initialize the debugspy's class */
static void
gst_debug_spy_class_init (GstDebugSpyClass * klass)
{
GObjectClass *gobject_class;
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GstElementClass *element_class;
GstBaseTransformClass *base_transform_class;
gobject_class = (GObjectClass *) klass;
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element_class = (GstElementClass *) klass;
base_transform_class = (GstBaseTransformClass *) klass;
gobject_class->set_property = gst_debug_spy_set_property;
gobject_class->get_property = gst_debug_spy_get_property;
base_transform_class->passthrough_on_same_caps = TRUE;
base_transform_class->transform_ip = gst_debug_spy_transform_ip;
g_object_class_install_property (gobject_class, PROP_SILENT,
g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
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FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CHECKSUM_TYPE,
g_param_spec_enum ("checksum-type", "Checksum TYpe",
"Checksum algorithm to use", GST_DEBUG_SPY_CHECKSUM_TYPE,
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G_CHECKSUM_SHA1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (element_class,
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"DebugSpy",
"Filter/Analyzer/Debug",
"DebugSpy provides information on buffers with bus messages",
"Guillaume Emont <gemont@igalia.com>");
gst_element_class_add_static_pad_template (element_class, &src_factory);
gst_element_class_add_static_pad_template (element_class, &sink_factory);
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GST_DEBUG_CATEGORY_INIT (gst_debug_spy_debug, "debugspy", 0, "debugspy");
}
/* initialize the new element
* instantiate pads and add them to element
* set pad calback functions
* initialize instance structure
*/
static void
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gst_debug_spy_init (GstDebugSpy * debugspy)
{
debugspy->silent = FALSE;
debugspy->checksum_type = G_CHECKSUM_SHA1;
}
static void
gst_debug_spy_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDebugSpy *debugspy = GST_DEBUGSPY (object);
switch (prop_id) {
case PROP_SILENT:
debugspy->silent = g_value_get_boolean (value);
break;
case PROP_CHECKSUM_TYPE:
debugspy->checksum_type = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_debug_spy_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDebugSpy *debugspy = GST_DEBUGSPY (object);
switch (prop_id) {
case PROP_SILENT:
g_value_set_boolean (value, debugspy->silent);
break;
case PROP_CHECKSUM_TYPE:
g_value_set_enum (value, debugspy->checksum_type);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* GstBaseTransform vmethod implementations */
static GstFlowReturn
gst_debug_spy_transform_ip (GstBaseTransform * transform, GstBuffer * buf)
{
GstDebugSpy *debugspy = GST_DEBUGSPY (transform);
if (debugspy->silent == FALSE) {
gchar *checksum;
GstMessage *message;
GstStructure *message_structure;
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GstMapInfo map;
GstCaps *caps;
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gst_buffer_map (buf, &map, GST_MAP_READ);
checksum = g_compute_checksum_for_data (debugspy->checksum_type,
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map.data, map.size);
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caps = gst_pad_get_current_caps (GST_BASE_TRANSFORM_SRC_PAD (transform));
message_structure = gst_structure_new ("buffer",
"checksum", G_TYPE_STRING, checksum,
"timestamp", GST_TYPE_CLOCK_TIME, GST_BUFFER_TIMESTAMP (buf),
"duration", GST_TYPE_CLOCK_TIME, GST_BUFFER_DURATION (buf),
"offset", G_TYPE_UINT64, GST_BUFFER_OFFSET (buf),
"offset_end", G_TYPE_UINT64, GST_BUFFER_OFFSET_END (buf),
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"size", G_TYPE_UINT, map.size, "caps", GST_TYPE_CAPS, caps, NULL);
if (caps)
gst_caps_unref (caps);
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g_free (checksum);
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gst_buffer_unmap (buf, &map);
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message =
gst_message_new_element (GST_OBJECT (transform), message_structure);
gst_element_post_message (GST_ELEMENT (transform), message);
}
return GST_FLOW_OK;
}