gstreamer/ext/musicbrainz/gsttrm.c

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/* GStreamer trm plugin
* Copyright (C) 2004 Jeremy Simon <jsimon13@yahoo.fr>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <sys/time.h>
#include "gsttrm.h"
/* musicbrainz signals and args */
enum
{
SIGNAL_SIGNATURE_AVAILABLE,
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_SIGNATURE,
ARG_ASCII_SIGNATURE
};
GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (bool) TRUE, "
"width = (int) { 8, 16 }, "
"depth = (int) { 8, 16 }, "
"rate = (int) [ 8000, 96000 ], " "channels = (int) [ 1, 2 ]")
);
GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (bool) TRUE, "
"width = (int) { 8, 16 }, "
"depth = (int) { 8, 16 }, "
"rate = (int) [ 8000, 96000 ], " "channels = (int) [ 1, 2 ]")
);
static void gst_musicbrainz_class_init (GstMusicBrainzClass * klass);
static void gst_musicbrainz_base_init (GstMusicBrainzClass * klass);
static void gst_musicbrainz_init (GstMusicBrainz * musicbrainz);
static void gst_musicbrainz_chain (GstPad * pad, GstData * data);
static void gst_musicbrainz_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_musicbrainz_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstElementStateReturn
gst_musicbrainz_change_state (GstElement * element);
static GstElementClass *parent_class = NULL;
static guint gst_musicbrainz_signals[LAST_SIGNAL] = { 0 };
GType
gst_musicbrainz_get_type (void)
{
static GType musicbrainz_type = 0;
if (!musicbrainz_type) {
static const GTypeInfo musicbrainz_info = {
sizeof (GstMusicBrainzClass),
(GBaseInitFunc) gst_musicbrainz_base_init,
NULL,
(GClassInitFunc) gst_musicbrainz_class_init,
NULL,
NULL,
sizeof (GstMusicBrainz),
0,
(GInstanceInitFunc) gst_musicbrainz_init,
};
musicbrainz_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstMusicBrainz", &musicbrainz_info, 0);
}
return musicbrainz_type;
}
static void
gst_musicbrainz_base_init (GstMusicBrainzClass * klass)
{
GstElementDetails gst_musicbrainz_details = {
"Compute TRM Id",
"Filter/Analyzer/Audio",
"Compute TRM Id from muscibrainz",
"Jeremy Simon <jsimon13@yahoo.fr>",
};
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details (element_class, &gst_musicbrainz_details);
}
static void
gst_musicbrainz_class_init (GstMusicBrainzClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SIGNATURE,
g_param_spec_string ("signature", "signature", "signature",
NULL, G_PARAM_READABLE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ASCII_SIGNATURE,
g_param_spec_string ("ascii_signature", "ascii_signature",
"ascii_signature", NULL, G_PARAM_READABLE));
gobject_class->set_property = gst_musicbrainz_set_property;
gobject_class->get_property = gst_musicbrainz_get_property;
gst_musicbrainz_signals[SIGNAL_SIGNATURE_AVAILABLE] =
g_signal_new ("signature-available", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMusicBrainzClass,
signature_available), NULL, NULL, g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gstelement_class->change_state = gst_musicbrainz_change_state;
}
static GstPadLinkReturn
gst_musicbrainz_sinkconnect (GstPad * pad, const GstCaps * caps)
{
GstMusicBrainz *musicbrainz;
GstStructure *structure;
const gchar *mimetype;
gint width;
musicbrainz = GST_MUSICBRAINZ (gst_pad_get_parent (pad));
musicbrainz->caps = caps;
structure = gst_caps_get_structure (caps, 0);
mimetype = gst_structure_get_name (structure);
if (!gst_structure_get_int (structure, "depth", &musicbrainz->depth) ||
!gst_structure_get_int (structure, "width", &width))
return GST_PAD_LINK_REFUSED;
if (musicbrainz->depth != width)
return GST_PAD_LINK_REFUSED;
if (!gst_structure_get_int (structure, "channels", &musicbrainz->channels))
return GST_PAD_LINK_REFUSED;
if (!gst_structure_get_int (structure, "rate", &musicbrainz->rate))
return GST_PAD_LINK_REFUSED;
trm_SetPCMDataInfo (musicbrainz->trm, musicbrainz->rate,
musicbrainz->channels, musicbrainz->depth);
musicbrainz->linked = TRUE;
return GST_PAD_LINK_OK;
}
static void
gst_musicbrainz_init (GstMusicBrainz * musicbrainz)
{
musicbrainz->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
"sink");
gst_element_add_pad (GST_ELEMENT (musicbrainz), musicbrainz->sinkpad);
gst_pad_set_chain_function (musicbrainz->sinkpad, gst_musicbrainz_chain);
gst_pad_set_link_function (musicbrainz->sinkpad, gst_musicbrainz_sinkconnect);
musicbrainz->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
"src");
gst_element_add_pad (GST_ELEMENT (musicbrainz), musicbrainz->srcpad);
musicbrainz->trm = NULL;
musicbrainz->linked = FALSE;
musicbrainz->data_available = FALSE;
musicbrainz->total_time = 0;
musicbrainz->signature_available = FALSE;
GST_FLAG_SET (musicbrainz, GST_ELEMENT_EVENT_AWARE);
/*GST_FLAG_SET(musicbrainz, GST_ELEMENT_THREAD_SUGGESTED); */
}
static void
gst_trm_handle_event (GstPad * pad, GstData * data)
{
GstEvent *event = GST_EVENT (data);
gst_pad_event_default (pad, event);
}
static void
gst_musicbrainz_chain (GstPad * pad, GstData * data)
{
GstMusicBrainz *musicbrainz;
GstBuffer *buf;
static GstFormat format = GST_FORMAT_TIME;
gint64 nanos;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
musicbrainz = GST_MUSICBRAINZ (gst_pad_get_parent (pad));
if (GST_IS_EVENT (data)) {
gst_trm_handle_event (pad, data);
return;
}
buf = GST_BUFFER (data);
if (musicbrainz->linked && !musicbrainz->data_available)
if (gst_pad_query (gst_pad_get_peer (pad), GST_QUERY_TOTAL, &format,
&nanos)) {
musicbrainz->total_time = nanos / GST_SECOND;
trm_SetSongLength (musicbrainz->trm, musicbrainz->total_time);
musicbrainz->data_available = TRUE;
gst_pad_try_set_caps (musicbrainz->srcpad, musicbrainz->caps);
}
if (!musicbrainz->signature_available
&& trm_GenerateSignature (musicbrainz->trm, GST_BUFFER_DATA (buf),
GST_BUFFER_SIZE (buf))) {
GST_DEBUG ("Signature");
trm_FinalizeSignature (musicbrainz->trm, musicbrainz->signature, NULL);
trm_ConvertSigToASCII (musicbrainz->trm, musicbrainz->signature,
musicbrainz->ascii_signature);
musicbrainz->signature_available = TRUE;
g_signal_emit (G_OBJECT (musicbrainz),
gst_musicbrainz_signals[SIGNAL_SIGNATURE_AVAILABLE], 0);
GST_DEBUG ("Signature : %s", musicbrainz->ascii_signature);
musicbrainz->signature_available = TRUE;
}
gst_pad_push (musicbrainz->srcpad, data);
}
static void
gst_musicbrainz_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMusicBrainz *musicbrainz;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_MUSICBRAINZ (object));
musicbrainz = GST_MUSICBRAINZ (object);
switch (prop_id) {
case ARG_SIGNATURE:
case ARG_ASCII_SIGNATURE:
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_musicbrainz_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstMusicBrainz *musicbrainz;
/* it's not null if we got it, but it might not be ours */
musicbrainz = GST_MUSICBRAINZ (object);
switch (prop_id) {
case ARG_SIGNATURE:{
g_value_set_string (value, musicbrainz->signature);
break;
}
case ARG_ASCII_SIGNATURE:{
g_value_set_string (value, musicbrainz->ascii_signature);
break;
}
default:{
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
}
static GstElementStateReturn
gst_musicbrainz_change_state (GstElement * element)
{
GstMusicBrainz *musicbrainz;
g_return_val_if_fail (GST_IS_MUSICBRAINZ (element), GST_STATE_FAILURE);
musicbrainz = GST_MUSICBRAINZ (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_PAUSED:
musicbrainz->trm = trm_New ();
break;
case GST_STATE_PAUSED_TO_READY:
trm_Delete (musicbrainz->trm);
musicbrainz->trm = NULL;
musicbrainz->linked = FALSE;
musicbrainz->data_available = FALSE;
musicbrainz->total_time = 0;
musicbrainz->signature_available = FALSE;
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "trm",
GST_RANK_NONE, GST_TYPE_MUSICBRAINZ);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"trm",
"A trm signature producer",
plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN)