--- /dev/null
+/* GStreamer
+ *
+ * gstofa.c
+ *
+ * Copyright (C) 2006 M. Derezynski
+ * Copyright (C) 2008 Eric Buehl
+ * Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <ofa1/ofa.h>
+#include "gstofa.h"
+
+#define PAD_CAPS \
+ "audio/x-raw-int, " \
+ "rate = (int) [ 1, MAX ], " \
+ "channels = (int) [ 1, 2 ], " \
+ "endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, " \
+ "width = (int) { 16 }, " \
+ "depth = (int) { 16 }, " \
+ "signed = (boolean) true"
+
+GST_DEBUG_CATEGORY_STATIC (gst_ofa_debug);
+#define GST_CAT_DEFAULT gst_ofa_debug
+
+enum
+{
+ PROP_0,
+ PROP_FINGERPRINT,
+};
+
+
+#define _do_init(bla) \
+ GST_DEBUG_CATEGORY_INIT (gst_ofa_debug, "ofa", 0, "ofa element");
+
+GST_BOILERPLATE_FULL (GstOFA, gst_ofa, GstAudioFilter,
+ GST_TYPE_AUDIO_FILTER, _do_init);
+
+static void gst_ofa_finalize (GObject * object);
+static void gst_ofa_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+static GstFlowReturn gst_ofa_transform_ip (GstBaseTransform * trans,
+ GstBuffer * buf);
+static gboolean gst_ofa_event (GstBaseTransform * trans, GstEvent * event);
+
+static void
+gst_ofa_base_init (gpointer g_class)
+{
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
+ GstAudioFilterClass *audio_filter_class = (GstAudioFilterClass *) g_class;
+ GstCaps *caps;
+
+ gst_element_class_set_details_simple (gstelement_class, "OFA",
+ "MusicIP Fingerprinting element",
+ "Find a music fingerprint using MusicIP's libofa",
+ "Milosz Derezynski <internalerror@gmail.com>, Eric Buehl <eric.buehl@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_ofa_finalize (GObject * object)
+{
+ GstOFA *ofa = GST_OFA (object);
+
+ if (ofa->adapter) {
+ g_object_unref (ofa->adapter);
+ ofa->adapter = NULL;
+ }
+
+ g_free (ofa->fingerprint);
+ ofa->fingerprint = NULL;
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_ofa_class_init (GstOFAClass * klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ GstBaseTransformClass *gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (klass);
+
+ gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_ofa_get_property);
+
+ g_object_class_install_property (gobject_class, PROP_FINGERPRINT,
+ g_param_spec_string ("fingerprint", "Resulting fingerprint",
+ "Resulting fingerprint", NULL, G_PARAM_READABLE));
+
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_ofa_finalize);
+
+ gstbasetrans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_ofa_transform_ip);
+ gstbasetrans_class->event = GST_DEBUG_FUNCPTR (gst_ofa_event);
+ gstbasetrans_class->passthrough_on_same_caps = TRUE;
+}
+
+static void
+create_fingerprint (GstOFA * ofa)
+{
+ GstBuffer *buf;
+ gint rate = GST_AUDIO_FILTER (ofa)->format.rate;
+ gint channels = GST_AUDIO_FILTER (ofa)->format.channels;
+ gint width = GST_AUDIO_FILTER (ofa)->format.width / 8;
+ gint endianness =
+ (GST_AUDIO_FILTER (ofa)->format.
+ bigend) ? OFA_BIG_ENDIAN : OFA_LITTLE_ENDIAN;
+ GstTagList *tags;
+
+ buf =
+ gst_adapter_take_buffer (ofa->adapter,
+ gst_adapter_available (ofa->adapter));
+
+ ofa->fingerprint = g_strdup (ofa_create_print (GST_BUFFER_DATA (buf),
+ endianness,
+ GST_BUFFER_SIZE (buf) / width, rate, (channels == 2) ? 1 : 0));
+
+ gst_buffer_unref (buf);
+
+ tags = gst_tag_list_new ();
+ gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
+ GST_TAG_OFA_FINGERPRINT, ofa->fingerprint, NULL);
+ gst_element_found_tags (GST_ELEMENT (ofa), tags);
+
+ ofa->record = FALSE;
+}
+
+static gboolean
+gst_ofa_event (GstBaseTransform * trans, GstEvent * event)
+{
+ GstOFA *ofa = GST_OFA (trans);
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_FLUSH_STOP:
+ case GST_EVENT_NEWSEGMENT:
+ gst_adapter_clear (ofa->adapter);
+ ofa->record = TRUE;
+ g_free (ofa->fingerprint);
+ ofa->fingerprint = NULL;
+ break;
+ case GST_EVENT_EOS:
+ /* we got to the end of the stream but never generated a fingerprint
+ * (probably under 135 seconds)
+ */
+ if (!ofa->fingerprint)
+ create_fingerprint (ofa);
+ break;
+ default:
+ break;
+ }
+
+ return TRUE;
+}
+
+static void
+gst_ofa_init (GstOFA * ofa, GstOFAClass * g_class)
+{
+ gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (ofa), TRUE);
+
+ ofa->fingerprint = NULL;
+ ofa->record = TRUE;
+
+ ofa->adapter = gst_adapter_new ();
+}
+
+static GstFlowReturn
+gst_ofa_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
+{
+ GstOFA *ofa = GST_OFA (trans);
+ guint64 nframes;
+ GstClockTime duration;
+ gint rate = GST_AUDIO_FILTER (ofa)->format.rate;
+ gint channels = GST_AUDIO_FILTER (ofa)->format.channels;
+ gint width = GST_AUDIO_FILTER (ofa)->format.width / 8;
+
+ g_return_val_if_fail (rate > 0 && channels > 0
+ && width > 0, GST_FLOW_NOT_NEGOTIATED);
+
+ if (ofa->record)
+ gst_adapter_push (ofa->adapter, gst_buffer_copy (buf));
+
+ nframes =
+ gst_util_uint64_scale (gst_adapter_available (ofa->adapter), 1,
+ channels * width);
+ duration =
+ GST_FRAMES_TO_CLOCK_TIME (gst_adapter_available (ofa->adapter), rate);
+
+ if (duration >= 135 * GST_SECOND && ofa->fingerprint == NULL)
+ create_fingerprint (ofa);
+
+ return GST_FLOW_OK;
+}
+
+static void
+gst_ofa_get_property (GObject * object, guint prop_id, GValue * value,
+ GParamSpec * pspec)
+{
+ GstOFA *ofa = GST_OFA (object);
+
+ switch (prop_id) {
+ case PROP_FINGERPRINT:
+ g_value_set_string (value, ofa->fingerprint);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ gboolean ret;
+
+ ret = gst_element_register (plugin, "ofa", GST_RANK_NONE, GST_TYPE_OFA);
+
+ if (ret) {
+ /* TODO: get this into core */
+ gst_tag_register (GST_TAG_OFA_FINGERPRINT, GST_TAG_FLAG_META,
+ G_TYPE_STRING, "ofa fingerprint", "OFA fingerprint", NULL);
+ }
+
+ return ret;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "ofa",
+ "Calculate MusicIP fingerprint from audio files",
+ plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
--- /dev/null
+/* GStreamer
+ *
+ * gstofa.h
+ *
+ * Copyright (C) 2006 M. Derezynski
+ * Copyright (C) 2008 Eric Buehl
+ * Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __GST_OFA_H__
+#define __GST_OFA_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstadapter.h>
+#include <gst/audio/gstaudiofilter.h>
+#include <gst/audio/audio.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_OFA \
+ (gst_ofa_get_type())
+#define GST_OFA(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OFA,GstOFA))
+#define GST_OFA_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OFA,GstOFAClass))
+#define GST_IS_OFA(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OFA))
+#define GST_IS_OFA_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OFA))
+
+#define GST_TAG_OFA_FINGERPRINT "ofa-fingerprint"
+
+typedef struct _GstOFA GstOFA;
+typedef struct _GstOFAClass GstOFAClass;
+
+
+/**
+ * GstOFA:
+ *
+ * Opaque #GstOFA data structure
+ */
+
+struct _GstOFA
+{
+ GstAudioFilter element;
+
+ /*< private > */
+
+ GstAdapter *adapter;
+ char *fingerprint;
+ gboolean record;
+};
+
+struct _GstOFAClass
+{
+ GstAudioFilterClass parent_class;
+};
+
+GType gst_ofa_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_OFA_H__ */
projects / platform / upstream / gstreamer.git / commitdiff