gst/accurip/gstaccurip.c - imx-gst-plugins-bad - Git at Google

 /* GStreamer AccurateRip (TM) audio checksumming element
  *
  * Copyright (C) 2012 Christophe Fergeau <teuf@gnome.org>
  *
  * Based on the GStreamer chromaprint audio fingerprinting element
  * Copyright (C) 2006 M. Derezynski
  * Copyright (C) 2008 Eric Buehl
  * Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>
  * Copyright (C) 2011 Lukáš Lalinský <lalinsky@gmail.com>
  * Copyright (C) 2012 Collabora Ltd. <tim.muller@collabora.co.uk>
  *
  * 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.
  */
 /*
  * Based on the documentation from
  * http://forum.dbpoweramp.com/showthread.php?20641-AccurateRip-CRC-Calculation
  * and
  * http://jonls.dk/2009/10/calculating-accuraterip-checksums/
  */

 /**
  * SECTION:element-accurip
  * @title: accurip
  * @short_desc: Computes an AccurateRip CRC
  *
  * The accurip element calculates a CRC for an audio stream which can be used
  * to match the audio stream to a database hosted on
  * <ulink url="http://accuraterip.com/">AccurateRip</ulink>. This database
  * is used to check for a CD rip accuracy.
  *
  * ## Example launch line
  * |[
  * gst-launch-1.0 -m uridecodebin uri=file:///path/to/song.flac ! audioconvert ! accurip ! fakesink
  * ]|
  *
  */

 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif

 #include "gstaccurip.h"

 #define DEFAULT_MAX_DURATION 120

 #define PAD_CAPS \
         "audio/x-raw, " \
         "format = (string) " GST_AUDIO_NE(S16) ", "\
         "rate = (int) 44100, " \
         "channels = (int) 2"

 GST_DEBUG_CATEGORY_STATIC (gst_accurip_debug);
 #define GST_CAT_DEFAULT gst_accurip_debug

 enum
 {
   PROP_0,
   PROP_FIRST_TRACK,
   PROP_LAST_TRACK
 };

 #define parent_class gst_accurip_parent_class
 G_DEFINE_TYPE (GstAccurip, gst_accurip, GST_TYPE_AUDIO_FILTER);


 static void gst_accurip_finalize (GObject * object);
 static void gst_accurip_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec);
 static void gst_accurip_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec);
 static GstFlowReturn gst_accurip_transform_ip (GstBaseTransform * trans,
     GstBuffer * buf);
 static gboolean gst_accurip_sink_event (GstBaseTransform * trans,
     GstEvent * event);

 static void
 gst_accurip_class_init (GstAccuripClass * klass)
 {
   GObjectClass *gobject_class;
   GstBaseTransformClass *gstbasetrans_class;
   GstCaps *caps;

   gobject_class = G_OBJECT_CLASS (klass);
   gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (klass);

   gobject_class->set_property = gst_accurip_set_property;
   gobject_class->get_property = gst_accurip_get_property;

   g_object_class_install_property (gobject_class, PROP_FIRST_TRACK,
       g_param_spec_boolean ("first-track", "First track",
           "Indicate to the CRC calculation algorithm that this is the first track of a set",
           FALSE, G_PARAM_READWRITE));

   g_object_class_install_property (gobject_class, PROP_LAST_TRACK,
       g_param_spec_boolean ("last-track", "Last track",
           "Indicate to the CRC calculation algorithm that this is the last track of a set",
           FALSE, G_PARAM_READWRITE));

   gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_accurip_finalize);

   gstbasetrans_class->transform_ip =
       GST_DEBUG_FUNCPTR (gst_accurip_transform_ip);
   gstbasetrans_class->sink_event = GST_DEBUG_FUNCPTR (gst_accurip_sink_event);
   gstbasetrans_class->passthrough_on_same_caps = TRUE;

   gst_element_class_set_metadata (GST_ELEMENT_CLASS (klass),
       "AccurateRip(TM) CRC element",
       "Filter/Analyzer/Audio",
       "Computes an AccurateRip CRC", "Christophe Fergeau <teuf@gnome.org>");

   caps = gst_caps_from_string (PAD_CAPS);
   gst_audio_filter_class_add_pad_templates (GST_AUDIO_FILTER_CLASS (klass),
       caps);
   gst_caps_unref (caps);
 }

 static void
 ring_free (GstAccurip * accurip)
 {
   g_free (accurip->crcs_ring);
   g_free (accurip->crcs_v2_ring);
   accurip->crcs_ring = NULL;
   accurip->crcs_v2_ring = NULL;
   accurip->ring_samples = 0;
 }

 static void
 gst_accurip_reset (GstAccurip * accurip)
 {
   if (accurip->num_samples != 0) {
     /* Don't reset these values on the NEW_SEGMENT event we get when
      * the pipeline starts playing, they may have been set by the
      * element user while creating the pipeline
      */
     accurip->is_first = FALSE;
     accurip->is_last = FALSE;
     ring_free (accurip);
   }
   accurip->crc = 0;
   accurip->crc_v2 = 0;

   accurip->num_samples = 0;
 }

 /* We must ignore the first and last 5 CD sectors. A CD sector is worth
  * 2352 bytes of audio */
 #define IGNORED_SAMPLES_COUNT (2352 * 5 / (2*2))

 static void
 gst_accurip_emit_tags (GstAccurip * accurip)
 {
   GstTagList *tags;

   if (accurip->num_samples == 0)
     return;

   if (accurip->is_last) {
     guint index;
     if (accurip->ring_samples <= IGNORED_SAMPLES_COUNT) {
       return;
     }
     index = accurip->ring_samples - IGNORED_SAMPLES_COUNT;
     index %= (IGNORED_SAMPLES_COUNT + 1);
     accurip->crc = accurip->crcs_ring[index];
     accurip->crc_v2 = accurip->crcs_v2_ring[index];
   }

   GST_DEBUG_OBJECT (accurip,
       "Generating CRC based on %" G_GUINT64_FORMAT " samples",
       accurip->num_samples);

   tags = gst_tag_list_new (GST_TAG_ACCURIP_CRC, accurip->crc,
       GST_TAG_ACCURIP_CRC_V2, accurip->crc_v2, NULL);

   GST_DEBUG_OBJECT (accurip, "Computed CRC=%08X and CRCv2=0x%08X \n",
       accurip->crc, accurip->crc_v2);

   gst_pad_push_event (GST_BASE_TRANSFORM_SRC_PAD (accurip),
       gst_event_new_tag (tags));
 }

 static void
 gst_accurip_init (GstAccurip * accurip)
 {
   gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (accurip), TRUE);
 }

 static void
 gst_accurip_finalize (GObject * object)
 {
   ring_free (GST_ACCURIP (object));

   G_OBJECT_CLASS (parent_class)->finalize (object);
 }

 static GstFlowReturn
 gst_accurip_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
 {
   GstAccurip *accurip = GST_ACCURIP (trans);
   GstAudioFilter *filter = GST_AUDIO_FILTER (trans);
   guint32 *data;
   GstMapInfo map_info;
   guint nsamples;
   gint channels;
   guint i;

   channels = GST_AUDIO_INFO_CHANNELS (&filter->info);

   if (G_UNLIKELY (channels != 2))
     return GST_FLOW_NOT_NEGOTIATED;

   if (!gst_buffer_map (buf, &map_info, GST_MAP_READ))
     return GST_FLOW_ERROR;

   data = (guint32 *) map_info.data;
   nsamples = map_info.size / (channels * 2);

   for (i = 0; i < nsamples; i++) {
     guint64 mult_sample;

     /* the AccurateRip algorithm counts samples starting from 1 instead
      * of 0, that's why we start by incrementing the number of samples
      * before doing the calculations
      */
     accurip->num_samples++;

     /* On the first track, we have to ignore the first 5 CD sectors of
      * audio data
      */
     if (accurip->is_first && accurip->num_samples < IGNORED_SAMPLES_COUNT)
       continue;

     /* Actual CRC computation is here */
     mult_sample = data[i] * accurip->num_samples;
     accurip->crc += mult_sample;
     accurip->crc_v2 += mult_sample & 0xffffffff;
     accurip->crc_v2 += (mult_sample >> 32);

     /* On the last track, we've got to ignore the last 5 CD sectors of
      * audio data, since we cannot know in advance when the last buffer
      * will be, we keep 5 CD sectors samples + 1 in memory so that we
      * can rollback to the 'good' value when we reach the end of stream.
      * This magic is only needed when the 'track-last' property is set.
      */
     if (accurip->is_last) {
       guint index = accurip->ring_samples % (IGNORED_SAMPLES_COUNT + 1);
       accurip->ring_samples++;
       accurip->crcs_ring[index] = accurip->crc;
       accurip->crcs_v2_ring[index] = accurip->crc_v2;
     }
   }

   gst_buffer_unmap (buf, &map_info);

   return GST_FLOW_OK;
 }

 static gboolean
 gst_accurip_sink_event (GstBaseTransform * trans, GstEvent * event)
 {
   GstAccurip *accurip = GST_ACCURIP (trans);

   switch (GST_EVENT_TYPE (event)) {
     case GST_EVENT_FLUSH_STOP:
     case GST_EVENT_SEGMENT:
       GST_DEBUG_OBJECT (trans, "Got %s event, clearing buffer",
           GST_EVENT_TYPE_NAME (event));
       gst_accurip_emit_tags (accurip);
       gst_accurip_reset (accurip);
       break;
     case GST_EVENT_EOS:
       gst_accurip_emit_tags (accurip);
       break;
     default:
       break;
   }

   return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
 }

 static void
 gst_accurip_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec)
 {
   GstAccurip *accurip = GST_ACCURIP (object);

   switch (prop_id) {
     case PROP_FIRST_TRACK:
       accurip->is_first = g_value_get_boolean (value);
       break;
     case PROP_LAST_TRACK:
       if (accurip->is_last != g_value_get_boolean (value)) {
         ring_free (accurip);
       }
       accurip->is_last = g_value_get_boolean (value);
       if (accurip->is_last) {
         if (accurip->crcs_ring == NULL) {
           accurip->crcs_ring = g_new0 (guint32, IGNORED_SAMPLES_COUNT + 1);
         }
         if (accurip->crcs_v2_ring == NULL) {
           accurip->crcs_v2_ring = g_new0 (guint32, IGNORED_SAMPLES_COUNT + 1);
         }
       }
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }

 static void
 gst_accurip_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec)
 {
   GstAccurip *accurip = GST_ACCURIP (object);

   switch (prop_id) {
     case PROP_FIRST_TRACK:
       g_value_set_boolean (value, accurip->is_first);
       break;
     case PROP_LAST_TRACK:
       g_value_set_boolean (value, accurip->is_last);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }

 static gboolean
 plugin_init (GstPlugin * plugin)
 {
   gboolean ret;

   GST_DEBUG_CATEGORY_INIT (gst_accurip_debug, "accurip", 0, "accurip element");

   ret = gst_element_register (plugin, "accurip", GST_RANK_NONE,
       GST_TYPE_ACCURIP);

   if (ret) {
     gst_tag_register (GST_TAG_ACCURIP_CRC, GST_TAG_FLAG_META,
         G_TYPE_UINT, "accurip crc", "AccurateRip(TM) CRC", NULL);
     gst_tag_register (GST_TAG_ACCURIP_CRC_V2, GST_TAG_FLAG_META,
         G_TYPE_UINT, "accurip crc (v2)", "AccurateRip(TM) CRC (version 2)",
         NULL);
   }

   return ret;
 }

 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
     GST_VERSION_MINOR,
     accurip,
     "Computes an AccurateRip CRC",
     plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
	/* GStreamer AccurateRip (TM) audio checksumming element
	*
	* Copyright (C) 2012 Christophe Fergeau <teuf@gnome.org>
	*
	* Based on the GStreamer chromaprint audio fingerprinting element
	* Copyright (C) 2006 M. Derezynski
	* Copyright (C) 2008 Eric Buehl
	* Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>
	* Copyright (C) 2011 Lukáš Lalinský <lalinsky@gmail.com>
	* Copyright (C) 2012 Collabora Ltd. <tim.muller@collabora.co.uk>
	*
	* 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.
	*/
	/*
	* Based on the documentation from
	* http://forum.dbpoweramp.com/showthread.php?20641-AccurateRip-CRC-Calculation
	* and
	* http://jonls.dk/2009/10/calculating-accuraterip-checksums/
	*/

	/**
	* SECTION:element-accurip
	* @title: accurip
	* @short_desc: Computes an AccurateRip CRC
	*
	* The accurip element calculates a CRC for an audio stream which can be used
	* to match the audio stream to a database hosted on
	* <ulink url="http://accuraterip.com/">AccurateRip</ulink>. This database
	* is used to check for a CD rip accuracy.
	*
	* ## Example launch line
	* \|[
	* gst-launch-1.0 -m uridecodebin uri=file:///path/to/song.flac ! audioconvert ! accurip ! fakesink
	* ]\|
	*
	*/

	#ifdef HAVE_CONFIG_H
	#include <config.h>
	#endif

	#include "gstaccurip.h"

	#define DEFAULT_MAX_DURATION 120

	#define PAD_CAPS \
	"audio/x-raw, " \
	"format = (string) " GST_AUDIO_NE(S16) ", "\
	"rate = (int) 44100, " \
	"channels = (int) 2"

	GST_DEBUG_CATEGORY_STATIC (gst_accurip_debug);
	#define GST_CAT_DEFAULT gst_accurip_debug

	enum
	{
	PROP_0,
	PROP_FIRST_TRACK,
	PROP_LAST_TRACK
	};

	#define parent_class gst_accurip_parent_class
	G_DEFINE_TYPE (GstAccurip, gst_accurip, GST_TYPE_AUDIO_FILTER);



	static void gst_accurip_finalize (GObject * object);
	static void gst_accurip_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec);
	static void gst_accurip_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec);
	static GstFlowReturn gst_accurip_transform_ip (GstBaseTransform * trans,
	GstBuffer * buf);
	static gboolean gst_accurip_sink_event (GstBaseTransform * trans,
	GstEvent * event);

	static void
	gst_accurip_class_init (GstAccuripClass * klass)
	{
	GObjectClass *gobject_class;
	GstBaseTransformClass *gstbasetrans_class;
	GstCaps *caps;

	gobject_class = G_OBJECT_CLASS (klass);
	gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (klass);

	gobject_class->set_property = gst_accurip_set_property;
	gobject_class->get_property = gst_accurip_get_property;

	g_object_class_install_property (gobject_class, PROP_FIRST_TRACK,
	g_param_spec_boolean ("first-track", "First track",
	"Indicate to the CRC calculation algorithm that this is the first track of a set",
	FALSE, G_PARAM_READWRITE));

	g_object_class_install_property (gobject_class, PROP_LAST_TRACK,
	g_param_spec_boolean ("last-track", "Last track",
	"Indicate to the CRC calculation algorithm that this is the last track of a set",
	FALSE, G_PARAM_READWRITE));

	gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_accurip_finalize);

	gstbasetrans_class->transform_ip =
	GST_DEBUG_FUNCPTR (gst_accurip_transform_ip);
	gstbasetrans_class->sink_event = GST_DEBUG_FUNCPTR (gst_accurip_sink_event);
	gstbasetrans_class->passthrough_on_same_caps = TRUE;

	gst_element_class_set_metadata (GST_ELEMENT_CLASS (klass),
	"AccurateRip(TM) CRC element",
	"Filter/Analyzer/Audio",
	"Computes an AccurateRip CRC", "Christophe Fergeau <teuf@gnome.org>");

	caps = gst_caps_from_string (PAD_CAPS);
	gst_audio_filter_class_add_pad_templates (GST_AUDIO_FILTER_CLASS (klass),
	caps);
	gst_caps_unref (caps);
	}

	static void
	ring_free (GstAccurip * accurip)
	{
	g_free (accurip->crcs_ring);
	g_free (accurip->crcs_v2_ring);
	accurip->crcs_ring = NULL;
	accurip->crcs_v2_ring = NULL;
	accurip->ring_samples = 0;
	}

	static void
	gst_accurip_reset (GstAccurip * accurip)
	{
	if (accurip->num_samples != 0) {
	/* Don't reset these values on the NEW_SEGMENT event we get when
	* the pipeline starts playing, they may have been set by the
	* element user while creating the pipeline
	*/
	accurip->is_first = FALSE;
	accurip->is_last = FALSE;
	ring_free (accurip);
	}
	accurip->crc = 0;
	accurip->crc_v2 = 0;

	accurip->num_samples = 0;
	}

	/* We must ignore the first and last 5 CD sectors. A CD sector is worth
	* 2352 bytes of audio */
	#define IGNORED_SAMPLES_COUNT (2352 * 5 / (2*2))

	static void
	gst_accurip_emit_tags (GstAccurip * accurip)
	{
	GstTagList *tags;

	if (accurip->num_samples == 0)
	return;

	if (accurip->is_last) {
	guint index;
	if (accurip->ring_samples <= IGNORED_SAMPLES_COUNT) {
	return;
	}
	index = accurip->ring_samples - IGNORED_SAMPLES_COUNT;
	index %= (IGNORED_SAMPLES_COUNT + 1);
	accurip->crc = accurip->crcs_ring[index];
	accurip->crc_v2 = accurip->crcs_v2_ring[index];
	}

	GST_DEBUG_OBJECT (accurip,
	"Generating CRC based on %" G_GUINT64_FORMAT " samples",
	accurip->num_samples);

	tags = gst_tag_list_new (GST_TAG_ACCURIP_CRC, accurip->crc,
	GST_TAG_ACCURIP_CRC_V2, accurip->crc_v2, NULL);

	GST_DEBUG_OBJECT (accurip, "Computed CRC=%08X and CRCv2=0x%08X \n",
	accurip->crc, accurip->crc_v2);

	gst_pad_push_event (GST_BASE_TRANSFORM_SRC_PAD (accurip),
	gst_event_new_tag (tags));
	}

	static void
	gst_accurip_init (GstAccurip * accurip)
	{
	gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (accurip), TRUE);
	}

	static void
	gst_accurip_finalize (GObject * object)
	{
	ring_free (GST_ACCURIP (object));

	G_OBJECT_CLASS (parent_class)->finalize (object);
	}

	static GstFlowReturn
	gst_accurip_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
	{
	GstAccurip *accurip = GST_ACCURIP (trans);
	GstAudioFilter *filter = GST_AUDIO_FILTER (trans);
	guint32 *data;
	GstMapInfo map_info;
	guint nsamples;
	gint channels;
	guint i;

	channels = GST_AUDIO_INFO_CHANNELS (&filter->info);

	if (G_UNLIKELY (channels != 2))
	return GST_FLOW_NOT_NEGOTIATED;

	if (!gst_buffer_map (buf, &map_info, GST_MAP_READ))
	return GST_FLOW_ERROR;

	data = (guint32 *) map_info.data;
	nsamples = map_info.size / (channels * 2);

	for (i = 0; i < nsamples; i++) {
	guint64 mult_sample;

	/* the AccurateRip algorithm counts samples starting from 1 instead
	* of 0, that's why we start by incrementing the number of samples
	* before doing the calculations
	*/
	accurip->num_samples++;

	/* On the first track, we have to ignore the first 5 CD sectors of
	* audio data
	*/
	if (accurip->is_first && accurip->num_samples < IGNORED_SAMPLES_COUNT)
	continue;

	/* Actual CRC computation is here */
	mult_sample = data[i] * accurip->num_samples;
	accurip->crc += mult_sample;
	accurip->crc_v2 += mult_sample & 0xffffffff;
	accurip->crc_v2 += (mult_sample >> 32);

	/* On the last track, we've got to ignore the last 5 CD sectors of
	* audio data, since we cannot know in advance when the last buffer
	* will be, we keep 5 CD sectors samples + 1 in memory so that we
	* can rollback to the 'good' value when we reach the end of stream.
	* This magic is only needed when the 'track-last' property is set.
	*/
	if (accurip->is_last) {
	guint index = accurip->ring_samples % (IGNORED_SAMPLES_COUNT + 1);
	accurip->ring_samples++;
	accurip->crcs_ring[index] = accurip->crc;
	accurip->crcs_v2_ring[index] = accurip->crc_v2;
	}
	}

	gst_buffer_unmap (buf, &map_info);

	return GST_FLOW_OK;
	}

	static gboolean
	gst_accurip_sink_event (GstBaseTransform * trans, GstEvent * event)
	{
	GstAccurip *accurip = GST_ACCURIP (trans);

	switch (GST_EVENT_TYPE (event)) {
	case GST_EVENT_FLUSH_STOP:
	case GST_EVENT_SEGMENT:
	GST_DEBUG_OBJECT (trans, "Got %s event, clearing buffer",
	GST_EVENT_TYPE_NAME (event));
	gst_accurip_emit_tags (accurip);
	gst_accurip_reset (accurip);
	break;
	case GST_EVENT_EOS:
	gst_accurip_emit_tags (accurip);
	break;
	default:
	break;
	}

	return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
	}

	static void
	gst_accurip_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec)
	{
	GstAccurip *accurip = GST_ACCURIP (object);

	switch (prop_id) {
	case PROP_FIRST_TRACK:
	accurip->is_first = g_value_get_boolean (value);
	break;
	case PROP_LAST_TRACK:
	if (accurip->is_last != g_value_get_boolean (value)) {
	ring_free (accurip);
	}
	accurip->is_last = g_value_get_boolean (value);
	if (accurip->is_last) {
	if (accurip->crcs_ring == NULL) {
	accurip->crcs_ring = g_new0 (guint32, IGNORED_SAMPLES_COUNT + 1);
	}
	if (accurip->crcs_v2_ring == NULL) {
	accurip->crcs_v2_ring = g_new0 (guint32, IGNORED_SAMPLES_COUNT + 1);
	}
	}
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}

	static void
	gst_accurip_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec)
	{
	GstAccurip *accurip = GST_ACCURIP (object);

	switch (prop_id) {
	case PROP_FIRST_TRACK:
	g_value_set_boolean (value, accurip->is_first);
	break;
	case PROP_LAST_TRACK:
	g_value_set_boolean (value, accurip->is_last);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}

	static gboolean
	plugin_init (GstPlugin * plugin)
	{
	gboolean ret;

	GST_DEBUG_CATEGORY_INIT (gst_accurip_debug, "accurip", 0, "accurip element");

	ret = gst_element_register (plugin, "accurip", GST_RANK_NONE,
	GST_TYPE_ACCURIP);

	if (ret) {
	gst_tag_register (GST_TAG_ACCURIP_CRC, GST_TAG_FLAG_META,
	G_TYPE_UINT, "accurip crc", "AccurateRip(TM) CRC", NULL);
	gst_tag_register (GST_TAG_ACCURIP_CRC_V2, GST_TAG_FLAG_META,
	G_TYPE_UINT, "accurip crc (v2)", "AccurateRip(TM) CRC (version 2)",
	NULL);
	}

	return ret;
	}

	GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
	GST_VERSION_MINOR,
	accurip,
	"Computes an AccurateRip CRC",
	plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)