ext/chromaprint/gstchromaprint.c - mtk-gst-plugins-bad - Git at Google

 /* vim:si:et:sw=2:sts=2:ts=8
  *
  * GStreamer
  *
  * gstchromaprint.c
  *
  * 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>
  *
  * 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:element-chromaprint
  *
  * FIXME:Describe chromaprint here.
  *
  * <refsect2>
  * <title>Example launch line</title>
  * |[
  * gst-launch -v -m fakesrc ! chromaprint ! fakesink silent=TRUE
  * filesrc location=<file> ! decodebin ! audioconvert ! chromaprint ! fakesink sync=0 silent=TRUE
  * ]|
  * </refsect2>
  */

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

 #include <gst/gst.h>
 #include <chromaprint.h>

 #include "gstchromaprint.h"

 #define DEFAULT_MAX_DURATION 120

 #define PAD_CAPS \
 	"audio/x-raw-int, " \
         "rate = (int) [ 1, MAX ], " \
         "channels = (int) [ 1, 2 ], " \
         "endianness = (int) { BYTE_ORDER  }, " \
         "width = (int) { 16 }, " \
         "depth = (int) { 16 }, " \
 	"signed = (boolean) true"

 GST_DEBUG_CATEGORY_STATIC (gst_chromaprint_debug);
 #define GST_CAT_DEFAULT gst_chromaprint_debug

 enum
 {
   PROP_0,
   PROP_FINGERPRINT,
   PROP_MAX_DURATION
 };


 GST_BOILERPLATE (GstChromaprint, gst_chromaprint, GstElement,
     GST_TYPE_AUDIO_FILTER);

 static void gst_chromaprint_finalize (GObject * object);
 static void gst_chromaprint_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec);
 static void gst_chromaprint_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec);
 static GstFlowReturn gst_chromaprint_transform_ip (GstBaseTransform * trans,
     GstBuffer * buf);
 static gboolean gst_chromaprint_event (GstBaseTransform * trans,
     GstEvent * event);

 /* GObject vmethod implementations */

 static void
 gst_chromaprint_base_init (gpointer g_class)
 {
   GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
   GstAudioFilterClass *audio_filter_class = (GstAudioFilterClass *) g_class;
   GstCaps *caps;

   gst_element_class_set_details_simple (element_class,
       "Chromaprint",
       "Chromaprint fingerprinting element",
       "Find an audio fingerprint using the Chromaprint library",
       "Lukáš Lalinský <lalinsky@gmail.com>");

   caps = gst_caps_from_string (PAD_CAPS);
   gst_audio_filter_class_add_pad_templates (audio_filter_class, caps);
   gst_caps_unref (caps);
 }

 static void
 gst_chromaprint_class_init (GstChromaprintClass * klass)
 {
   GObjectClass *gobject_class;
   GstBaseTransformClass *gstbasetrans_class;

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

   gobject_class->set_property =
       GST_DEBUG_FUNCPTR (gst_chromaprint_set_property);
   gobject_class->get_property =
       GST_DEBUG_FUNCPTR (gst_chromaprint_get_property);

   g_object_class_install_property (gobject_class, PROP_FINGERPRINT,
       g_param_spec_string ("fingerprint", "Resulting fingerprint",
           "Resulting fingerprint", NULL, G_PARAM_READABLE));

   g_object_class_install_property (gobject_class, PROP_MAX_DURATION,
       g_param_spec_uint ("duration", "Duration limit",
           "Number of seconds of audio to use for fingerpriting",
           0, G_MAXUINT, DEFAULT_MAX_DURATION,
           G_PARAM_READABLE | G_PARAM_WRITABLE));

   gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_chromaprint_finalize);

   gstbasetrans_class->transform_ip =
       GST_DEBUG_FUNCPTR (gst_chromaprint_transform_ip);
   gstbasetrans_class->event = GST_DEBUG_FUNCPTR (gst_chromaprint_event);
   gstbasetrans_class->passthrough_on_same_caps = TRUE;
 }

 static void
 gst_chromaprint_reset (GstChromaprint * chromaprint)
 {
   if (chromaprint->fingerprint) {
     chromaprint_dealloc (chromaprint->fingerprint);
     chromaprint->fingerprint = NULL;
   }

   chromaprint->nsamples = 0;
   chromaprint->duration = 0;
   chromaprint->record = TRUE;
 }

 static void
 gst_chromaprint_create_fingerprint (GstChromaprint * chromaprint)
 {
   GstTagList *tags;

   if (chromaprint->duration <= 3)
     return;

   GST_DEBUG ("Generating fingerprint based on %d seconds of audio",
       chromaprint->duration);
   chromaprint_finish (chromaprint->context);
   chromaprint_get_fingerprint (chromaprint->context, &chromaprint->fingerprint);
   chromaprint->record = FALSE;

   tags = gst_tag_list_new ();
   gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
       GST_TAG_CHROMAPRINT_FINGERPRINT, chromaprint->fingerprint, NULL);
   gst_element_found_tags (GST_ELEMENT (chromaprint), tags);
 }

 static void
 gst_chromaprint_init (GstChromaprint * chromaprint,
     GstChromaprintClass * gclass)
 {
   gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (chromaprint), TRUE);

   chromaprint->context = chromaprint_new (CHROMAPRINT_ALGORITHM_DEFAULT);
   chromaprint->fingerprint = NULL;
   chromaprint->max_duration = DEFAULT_MAX_DURATION;
   gst_chromaprint_reset (chromaprint);
 }

 static void
 gst_chromaprint_finalize (GObject * object)
 {
   GstChromaprint *chromaprint = GST_CHROMAPRINT (object);

   chromaprint->record = FALSE;

   if (chromaprint->context) {
     chromaprint_free (chromaprint->context);
     chromaprint->context = NULL;
   }

   if (chromaprint->fingerprint) {
     chromaprint_dealloc (chromaprint->fingerprint);
     chromaprint->fingerprint = NULL;
   }

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

 static GstFlowReturn
 gst_chromaprint_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
 {
   GstChromaprint *chromaprint = GST_CHROMAPRINT (trans);
   guint nsamples;
   gint rate = GST_AUDIO_FILTER (chromaprint)->format.rate;
   gint channels = GST_AUDIO_FILTER (chromaprint)->format.channels;

   g_return_val_if_fail (rate > 0 && channels > 0, GST_FLOW_NOT_NEGOTIATED);

   if (!chromaprint->record)
     return GST_FLOW_OK;

   nsamples = GST_BUFFER_SIZE (buf) / (channels * 2);
   if (!nsamples)
     return GST_FLOW_OK;

   if (!chromaprint->nsamples) {
     chromaprint_start (chromaprint->context, rate, channels);
   }
   chromaprint->nsamples += nsamples;
   chromaprint->duration = chromaprint->nsamples / rate;

   chromaprint_feed (chromaprint->context, GST_BUFFER_DATA (buf),
       GST_BUFFER_SIZE (buf) / 2);

   if (chromaprint->duration >= chromaprint->max_duration
       && !chromaprint->fingerprint) {
     gst_chromaprint_create_fingerprint (chromaprint);
   }

   return GST_FLOW_OK;
 }

 static gboolean
 gst_chromaprint_event (GstBaseTransform * trans, GstEvent * event)
 {
   GstChromaprint *chromaprint = GST_CHROMAPRINT (trans);

   switch (GST_EVENT_TYPE (event)) {
     case GST_EVENT_FLUSH_STOP:
     case GST_EVENT_NEWSEGMENT:
       GST_DEBUG ("Got %s event, clearing buffer", GST_EVENT_TYPE_NAME (event));
       gst_chromaprint_reset (chromaprint);
       break;
     case GST_EVENT_EOS:
       if (!chromaprint->fingerprint) {
         gst_chromaprint_create_fingerprint (chromaprint);
       }
       break;
     default:
       break;
   }

   return TRUE;
 }

 static void
 gst_chromaprint_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec)
 {
   GstChromaprint *chromaprint = GST_CHROMAPRINT (object);

   switch (prop_id) {
     case PROP_MAX_DURATION:
       chromaprint->max_duration = g_value_get_uint (value);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }

 static void
 gst_chromaprint_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec)
 {
   GstChromaprint *chromaprint = GST_CHROMAPRINT (object);

   switch (prop_id) {
     case PROP_FINGERPRINT:
       g_value_set_string (value, chromaprint->fingerprint);
       break;
     case PROP_MAX_DURATION:
       g_value_set_uint (value, chromaprint->max_duration);
       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_chromaprint_debug, "chromaprint",
       0, "chromaprint element");

   GST_DEBUG ("libchromaprint %s", chromaprint_get_version ());

   ret = gst_element_register (plugin, "chromaprint", GST_RANK_NONE,
       GST_TYPE_CHROMAPRINT);

   if (ret) {
     gst_tag_register (GST_TAG_CHROMAPRINT_FINGERPRINT, GST_TAG_FLAG_META,
         G_TYPE_STRING, "chromaprint fingerprint", "Chromaprint fingerprint",
         NULL);
   }

   return ret;
 }

 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
     GST_VERSION_MINOR,
     "chromaprint",
     "Calculate Chromaprint fingerprint from audio files",
     plugin_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/")
	/* vim:si:et:sw=2:sts=2:ts=8
	*
	* GStreamer
	*
	* gstchromaprint.c
	*
	* 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>
	*
	* 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:element-chromaprint
	*
	* FIXME:Describe chromaprint here.
	*
	* <refsect2>
	* <title>Example launch line</title>
	* \|[
	* gst-launch -v -m fakesrc ! chromaprint ! fakesink silent=TRUE
	* filesrc location=<file> ! decodebin ! audioconvert ! chromaprint ! fakesink sync=0 silent=TRUE
	* ]\|
	* </refsect2>
	*/

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

	#include <gst/gst.h>
	#include <chromaprint.h>

	#include "gstchromaprint.h"

	#define DEFAULT_MAX_DURATION 120

	#define PAD_CAPS \
	"audio/x-raw-int, " \
	"rate = (int) [ 1, MAX ], " \
	"channels = (int) [ 1, 2 ], " \
	"endianness = (int) { BYTE_ORDER }, " \
	"width = (int) { 16 }, " \
	"depth = (int) { 16 }, " \
	"signed = (boolean) true"

	GST_DEBUG_CATEGORY_STATIC (gst_chromaprint_debug);
	#define GST_CAT_DEFAULT gst_chromaprint_debug

	enum
	{
	PROP_0,
	PROP_FINGERPRINT,
	PROP_MAX_DURATION
	};


	GST_BOILERPLATE (GstChromaprint, gst_chromaprint, GstElement,
	GST_TYPE_AUDIO_FILTER);

	static void gst_chromaprint_finalize (GObject * object);
	static void gst_chromaprint_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec);
	static void gst_chromaprint_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec);
	static GstFlowReturn gst_chromaprint_transform_ip (GstBaseTransform * trans,
	GstBuffer * buf);
	static gboolean gst_chromaprint_event (GstBaseTransform * trans,
	GstEvent * event);

	/* GObject vmethod implementations */

	static void
	gst_chromaprint_base_init (gpointer g_class)
	{
	GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
	GstAudioFilterClass audio_filter_class = (GstAudioFilterClass ) g_class;
	GstCaps *caps;

	gst_element_class_set_details_simple (element_class,
	"Chromaprint",
	"Chromaprint fingerprinting element",
	"Find an audio fingerprint using the Chromaprint library",
	"Lukáš Lalinský <lalinsky@gmail.com>");

	caps = gst_caps_from_string (PAD_CAPS);
	gst_audio_filter_class_add_pad_templates (audio_filter_class, caps);
	gst_caps_unref (caps);
	}

	static void
	gst_chromaprint_class_init (GstChromaprintClass * klass)
	{
	GObjectClass *gobject_class;
	GstBaseTransformClass *gstbasetrans_class;

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

	gobject_class->set_property =
	GST_DEBUG_FUNCPTR (gst_chromaprint_set_property);
	gobject_class->get_property =
	GST_DEBUG_FUNCPTR (gst_chromaprint_get_property);

	g_object_class_install_property (gobject_class, PROP_FINGERPRINT,
	g_param_spec_string ("fingerprint", "Resulting fingerprint",
	"Resulting fingerprint", NULL, G_PARAM_READABLE));

	g_object_class_install_property (gobject_class, PROP_MAX_DURATION,
	g_param_spec_uint ("duration", "Duration limit",
	"Number of seconds of audio to use for fingerpriting",
	0, G_MAXUINT, DEFAULT_MAX_DURATION,
	G_PARAM_READABLE \| G_PARAM_WRITABLE));

	gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_chromaprint_finalize);

	gstbasetrans_class->transform_ip =
	GST_DEBUG_FUNCPTR (gst_chromaprint_transform_ip);
	gstbasetrans_class->event = GST_DEBUG_FUNCPTR (gst_chromaprint_event);
	gstbasetrans_class->passthrough_on_same_caps = TRUE;
	}

	static void
	gst_chromaprint_reset (GstChromaprint * chromaprint)
	{
	if (chromaprint->fingerprint) {
	chromaprint_dealloc (chromaprint->fingerprint);
	chromaprint->fingerprint = NULL;
	}

	chromaprint->nsamples = 0;
	chromaprint->duration = 0;
	chromaprint->record = TRUE;
	}

	static void
	gst_chromaprint_create_fingerprint (GstChromaprint * chromaprint)
	{
	GstTagList *tags;

	if (chromaprint->duration <= 3)
	return;

	GST_DEBUG ("Generating fingerprint based on %d seconds of audio",
	chromaprint->duration);
	chromaprint_finish (chromaprint->context);
	chromaprint_get_fingerprint (chromaprint->context, &chromaprint->fingerprint);
	chromaprint->record = FALSE;

	tags = gst_tag_list_new ();
	gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
	GST_TAG_CHROMAPRINT_FINGERPRINT, chromaprint->fingerprint, NULL);
	gst_element_found_tags (GST_ELEMENT (chromaprint), tags);
	}

	static void
	gst_chromaprint_init (GstChromaprint * chromaprint,
	GstChromaprintClass * gclass)
	{
	gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (chromaprint), TRUE);

	chromaprint->context = chromaprint_new (CHROMAPRINT_ALGORITHM_DEFAULT);
	chromaprint->fingerprint = NULL;
	chromaprint->max_duration = DEFAULT_MAX_DURATION;
	gst_chromaprint_reset (chromaprint);
	}

	static void
	gst_chromaprint_finalize (GObject * object)
	{
	GstChromaprint *chromaprint = GST_CHROMAPRINT (object);

	chromaprint->record = FALSE;

	if (chromaprint->context) {
	chromaprint_free (chromaprint->context);
	chromaprint->context = NULL;
	}

	if (chromaprint->fingerprint) {
	chromaprint_dealloc (chromaprint->fingerprint);
	chromaprint->fingerprint = NULL;
	}

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

	static GstFlowReturn
	gst_chromaprint_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
	{
	GstChromaprint *chromaprint = GST_CHROMAPRINT (trans);
	guint nsamples;
	gint rate = GST_AUDIO_FILTER (chromaprint)->format.rate;
	gint channels = GST_AUDIO_FILTER (chromaprint)->format.channels;

	g_return_val_if_fail (rate > 0 && channels > 0, GST_FLOW_NOT_NEGOTIATED);

	if (!chromaprint->record)
	return GST_FLOW_OK;

	nsamples = GST_BUFFER_SIZE (buf) / (channels * 2);
	if (!nsamples)
	return GST_FLOW_OK;

	if (!chromaprint->nsamples) {
	chromaprint_start (chromaprint->context, rate, channels);
	}
	chromaprint->nsamples += nsamples;
	chromaprint->duration = chromaprint->nsamples / rate;

	chromaprint_feed (chromaprint->context, GST_BUFFER_DATA (buf),
	GST_BUFFER_SIZE (buf) / 2);

	if (chromaprint->duration >= chromaprint->max_duration
	&& !chromaprint->fingerprint) {
	gst_chromaprint_create_fingerprint (chromaprint);
	}

	return GST_FLOW_OK;
	}

	static gboolean
	gst_chromaprint_event (GstBaseTransform * trans, GstEvent * event)
	{
	GstChromaprint *chromaprint = GST_CHROMAPRINT (trans);

	switch (GST_EVENT_TYPE (event)) {
	case GST_EVENT_FLUSH_STOP:
	case GST_EVENT_NEWSEGMENT:
	GST_DEBUG ("Got %s event, clearing buffer", GST_EVENT_TYPE_NAME (event));
	gst_chromaprint_reset (chromaprint);
	break;
	case GST_EVENT_EOS:
	if (!chromaprint->fingerprint) {
	gst_chromaprint_create_fingerprint (chromaprint);
	}
	break;
	default:
	break;
	}

	return TRUE;
	}

	static void
	gst_chromaprint_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec)
	{
	GstChromaprint *chromaprint = GST_CHROMAPRINT (object);

	switch (prop_id) {
	case PROP_MAX_DURATION:
	chromaprint->max_duration = g_value_get_uint (value);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}

	static void
	gst_chromaprint_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec)
	{
	GstChromaprint *chromaprint = GST_CHROMAPRINT (object);

	switch (prop_id) {
	case PROP_FINGERPRINT:
	g_value_set_string (value, chromaprint->fingerprint);
	break;
	case PROP_MAX_DURATION:
	g_value_set_uint (value, chromaprint->max_duration);
	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_chromaprint_debug, "chromaprint",
	0, "chromaprint element");

	GST_DEBUG ("libchromaprint %s", chromaprint_get_version ());

	ret = gst_element_register (plugin, "chromaprint", GST_RANK_NONE,
	GST_TYPE_CHROMAPRINT);

	if (ret) {
	gst_tag_register (GST_TAG_CHROMAPRINT_FINGERPRINT, GST_TAG_FLAG_META,
	G_TYPE_STRING, "chromaprint fingerprint", "Chromaprint fingerprint",
	NULL);
	}

	return ret;
	}

	GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
	GST_VERSION_MINOR,
	"chromaprint",
	"Calculate Chromaprint fingerprint from audio files",
	plugin_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/")