gstreamer/sys/cdrom/gstcdplayer.c
2012-04-05 18:02:56 +02:00

362 lines
9.6 KiB
C

/* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#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_base_init (gpointer g_class);
static void cdplayer_class_init (CDPlayerClass * klass);
static void cdplayer_init (CDPlayer * cdp);
static void cdplayer_finalize (GObject * object);
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 gboolean cdplayer_iterate (GstBin * bin);
static GstStateChangeReturn cdplayer_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class;
static guint cdplayer_signals[LAST_SIGNAL] = { 0 };
GType
cdplayer_get_type (void)
{
static GType cdplayer_type = 0;
if (!cdplayer_type) {
static const GTypeInfo cdplayer_info = {
sizeof (CDPlayerClass),
cdplayer_base_init,
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_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (element_class, "CD Player",
"Generic/Bin",
"Play CD audio through the CD Drive",
"Charles Schmidt <cbschmid@uiuc.edu>, "
"Wim Taymans <wim.taymans@chello.be>");
}
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_peek_parent (klass);
gobject_klass->finalize = GST_DEBUG_FUNCPTR (cdplayer_finalize);
gstelement_klass->change_state = GST_DEBUG_FUNCPTR (cdplayer_change_state);
gstbin_klass->iterate = GST_DEBUG_FUNCPTR (cdplayer_iterate);
gobject_klass->set_property = cdplayer_set_property;
gobject_klass->get_property = cdplayer_get_property;
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);
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_OBJECT_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_finalize (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)->finalize) {
G_OBJECT_CLASS (parent_class)->finalize (object);
}
}
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 GstStateChangeReturn
cdplayer_change_state (GstElement * element, GstStateChange transition)
{
CDPlayer *cdp;
GstState state = GST_STATE (element);
GstState pending = GST_STATE_PENDING (element);
g_return_val_if_fail (GST_IS_CDPLAYER (element), GST_STATE_CHANGE_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_CHANGE_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_CHANGE_FAILURE;
}
cdp->paused = TRUE;
}
break;
case GST_STATE_PLAYING:
if (cdp->paused == TRUE) {
if (cd_resume (CDPLAYER_CD (cdp)) == FALSE) {
return GST_STATE_CHANGE_FAILURE;
}
cdp->paused = FALSE;
} else {
if (cd_start (CDPLAYER_CD (cdp), cdp->start_track,
cdp->end_track) == FALSE) {
return GST_STATE_CHANGE_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_CHANGE_FAILURE;
}
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state) {
GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
}
return GST_STATE_CHANGE_SUCCESS;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "cdplayer", GST_RANK_NONE,
GST_TYPE_CDPLAYER);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, cdplayer, "CD Player", plugin_init, VERSION, GST_LICENSE, /* ? */
GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);