gstreamer/sys/cdrom/gstcdplayer.c

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/* gstcdplay
* Copyright (c) 2002 Charles Schmidt <cbschmid@uiuc.edu>
* 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.
*/
/* #define GST_DEBUG_ENABLED */
#include "gstcdplayer.h"
/* props */
enum {
ARG_0,
ARG_DEVICE,
ARG_NUM_TRACKS,
ARG_START_TRACK,
ARG_END_TRACK,
ARG_CURRENT_TRACK,
ARG_CDDB_DISCID,
};
/* signals */
enum {
TRACK_CHANGE,
LAST_SIGNAL,
};
static void cdplayer_class_init(CDPlayerClass *klass);
static void cdplayer_init(CDPlayer *cdp);
static void cdplayer_set_property(GObject *object,guint prop_id,const GValue *value,GParamSpec *spec);
static void cdplayer_get_property(GObject *object,guint prop_id,GValue *value,GParamSpec *spec);
static void cdplayer_dispose(GObject *object);
static gboolean cdplayer_iterate(GstBin *bin);
static GstElementStateReturn cdplayer_change_state(GstElement *element);
static gboolean plugin_init(GModule *module,GstPlugin *plugin);
static GstElementClass *parent_class;
static guint cdplayer_signals[LAST_SIGNAL] = {0};
static GstElementDetails cdplayer_details = {
"CD Player",
"Generic/Bin",
"LGPL",
"Play CD audio through the CD Drive",
VERSION,
"Charles Schmidt <cbschmid@uiuc.edu>",
"(C) 2002",
};
GType cdplayer_get_type(void)
{
static GType cdplayer_type = 0;
if (!cdplayer_type) {
static const GTypeInfo cdplayer_info = {
sizeof(CDPlayerClass),
NULL,
NULL,
(GClassInitFunc)cdplayer_class_init,
NULL,
NULL,
sizeof(CDPlayer),
0,
(GInstanceInitFunc)cdplayer_init,
NULL
};
cdplayer_type = g_type_register_static(GST_TYPE_BIN,"CDPlayer",&cdplayer_info,0);
}
return cdplayer_type;
}
static void cdplayer_class_init(CDPlayerClass *klass)
{
GObjectClass *gobject_klass;
GstElementClass *gstelement_klass;
GstBinClass *gstbin_klass;
gobject_klass = (GObjectClass *)klass;
gstelement_klass = (GstElementClass *)klass;
gstbin_klass = (GstBinClass *)klass;
parent_class = g_type_class_ref(gst_bin_get_type());
gobject_klass->dispose = GST_DEBUG_FUNCPTR(cdplayer_dispose);
gstelement_klass->change_state = GST_DEBUG_FUNCPTR(cdplayer_change_state);
gstbin_klass->iterate = GST_DEBUG_FUNCPTR(cdplayer_iterate);
g_object_class_install_property(gobject_klass,ARG_DEVICE,g_param_spec_string("device","device","CDROM device",NULL,G_PARAM_READWRITE));
g_object_class_install_property(gobject_klass,ARG_NUM_TRACKS,g_param_spec_int("num_tracks","num_tracks","Number of Tracks",G_MININT,G_MAXINT,0,G_PARAM_READABLE));
g_object_class_install_property(gobject_klass,ARG_START_TRACK,g_param_spec_int("start_track","start_track","Track to start playback on",1,CDPLAYER_MAX_TRACKS-1,1,G_PARAM_READWRITE));
g_object_class_install_property(gobject_klass,ARG_END_TRACK,g_param_spec_int("end_track","end_track","Track to end playback on",0,CDPLAYER_MAX_TRACKS-1,0,G_PARAM_READWRITE));
g_object_class_install_property(gobject_klass,ARG_CURRENT_TRACK,g_param_spec_int("current_track","current_track","Current track playing",1,CDPLAYER_MAX_TRACKS-1,1,G_PARAM_READABLE));
g_object_class_install_property(gobject_klass,ARG_CDDB_DISCID,g_param_spec_uint("cddb_discid","cddb_discid","CDDB Disc ID",0,G_MAXUINT,1,G_PARAM_READABLE));
cdplayer_signals[TRACK_CHANGE] = g_signal_new("track_change",G_TYPE_FROM_CLASS(klass),G_SIGNAL_RUN_LAST,G_STRUCT_OFFSET(CDPlayerClass,track_change),NULL,NULL,gst_marshal_VOID__INT,G_TYPE_NONE,1,G_TYPE_INT);
gobject_klass->set_property = cdplayer_set_property;
gobject_klass->get_property = cdplayer_get_property;
return;
}
static void cdplayer_init(CDPlayer *cdp)
{
cdp->device = g_strdup("/dev/cdrom");
cdp->num_tracks = -1;
cdp->start_track = 1;
cdp->end_track = 0;
cdp->current_track = 1;
cdp->paused = FALSE;
// GST_FLAG_SET(cdp,GST_BIN_FLAG_MANAGER);
return;
}
static void cdplayer_set_property(GObject *object,guint prop_id,const GValue *value,GParamSpec *spec)
{
CDPlayer *cdp;
g_return_if_fail(GST_IS_CDPLAYER(object));
cdp = CDPLAYER(object);
switch (prop_id) {
case ARG_DEVICE:
// FIXME prolly should uhh.. stop it or something
if (cdp->device) {
g_free(cdp->device);
}
cdp->device = g_strdup(g_value_get_string(value));
break;
case ARG_START_TRACK:
// FIXME prolly should uhh.. restart play, i guess... or something whatever
// FIXME we should only set current_track if its not playing...
cdp->current_track = cdp->start_track = g_value_get_int(value);
break;
case ARG_END_TRACK:
// FIXME prolly should restart play, maybe, or try to set it without interrupt..
cdp->end_track = g_value_get_int(value);
break;
default:
break;
}
return;
}
static void cdplayer_get_property(GObject *object,guint prop_id,GValue *value,GParamSpec *spec)
{
CDPlayer *cdp;
g_return_if_fail(GST_IS_CDPLAYER(object));
cdp = CDPLAYER(object);
switch (prop_id) {
case ARG_DEVICE:
g_value_set_string(value,cdp->device);
break;
case ARG_NUM_TRACKS:
g_value_set_int(value,cdp->num_tracks);
break;
case ARG_START_TRACK:
g_value_set_int(value,cdp->start_track);
break;
case ARG_END_TRACK:
g_value_set_int(value,cdp->end_track);
case ARG_CURRENT_TRACK:
g_value_set_int(value,cdp->current_track);
break;
case ARG_CDDB_DISCID:
g_value_set_uint(value,cdp->cddb_discid);
default:
break;
}
return;
}
static void cdplayer_dispose(GObject *object)
{
CDPlayer *cdp;
g_return_if_fail(GST_IS_CDPLAYER(object));
cdp = CDPLAYER(object);
g_free(cdp->device);
if (G_OBJECT_CLASS(parent_class)->dispose) {
G_OBJECT_CLASS(parent_class)->dispose(object);
}
return;
}
static gboolean cdplayer_iterate(GstBin *bin)
{
CDPlayer *cdp = CDPLAYER(bin);
gint current_track;
switch (cd_status(CDPLAYER_CD(cdp))) {
case CD_PLAYING:
current_track = cd_current_track(CDPLAYER_CD(cdp));
if (current_track > cdp->end_track && cdp->end_track != 0) {
return FALSE;
}
if (current_track != -1 && current_track != cdp->current_track) {
cdp->current_track = current_track;
g_signal_emit(G_OBJECT(cdp),cdplayer_signals[TRACK_CHANGE],0,cdp->current_track);
}
return TRUE;
break;
case CD_ERROR:
gst_element_set_state(GST_ELEMENT(bin),GST_STATE_PAUSED);
return FALSE;
break;
case CD_COMPLETED:
gst_element_set_state(GST_ELEMENT(bin),GST_STATE_PAUSED);
gst_element_set_eos(GST_ELEMENT(bin));
return FALSE;
break;
}
return FALSE;
}
static GstElementStateReturn cdplayer_change_state(GstElement *element)
{
CDPlayer *cdp;
GstElementState state = GST_STATE(element);
GstElementState pending = GST_STATE_PENDING(element);
g_return_val_if_fail(GST_IS_CDPLAYER(element),GST_STATE_FAILURE);
cdp = CDPLAYER(element);
switch (pending) {
case GST_STATE_READY:
if (state != GST_STATE_PAUSED) {
if (cd_init(CDPLAYER_CD(cdp),cdp->device) == FALSE) {
return GST_STATE_FAILURE;
}
cdp->num_tracks = cdp->cd.num_tracks;
cdp->cddb_discid = cd_cddb_discid(CDPLAYER_CD(cdp));
}
break;
case GST_STATE_PAUSED:
/* ready->paused is not useful */
if (state != GST_STATE_READY) {
if (cd_pause(CDPLAYER_CD(cdp)) == FALSE) {
return GST_STATE_FAILURE;
}
cdp->paused = TRUE;
}
break;
case GST_STATE_PLAYING:
if (cdp->paused == TRUE) {
if (cd_resume(CDPLAYER_CD(cdp)) == FALSE) {
return GST_STATE_FAILURE;
}
cdp->paused = FALSE;
} else {
if (cd_start(CDPLAYER_CD(cdp),cdp->start_track,cdp->end_track) == FALSE) {
return GST_STATE_FAILURE;
}
}
break;
case GST_STATE_NULL:
/* stop & close fd */
if (cd_stop(CDPLAYER_CD(cdp)) == FALSE || cd_close(CDPLAYER_CD(cdp)) == FALSE) {
return GST_STATE_FAILURE;
}
break;
default:
break;
}
if (GST_ELEMENT_CLASS(parent_class)->change_state) {
GST_ELEMENT_CLASS(parent_class)->change_state(element);
}
return GST_STATE_SUCCESS;
}
static gboolean plugin_init(GModule *module,GstPlugin *plugin)
{
GstElementFactory *factory;
factory = gst_element_factory_new("cdplayer",GST_TYPE_CDPLAYER,&cdplayer_details);
g_return_val_if_fail(factory != NULL,FALSE);
gst_plugin_add_feature(plugin,GST_PLUGIN_FEATURE(factory));
gst_plugin_set_longname(plugin,"CD Player");
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"cdplayer",
plugin_init
};