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gstreamer/ext/cdaudio/gstcdaudio.c
Wim Taymans 1e530c57a5 First attempt at a cd player plugins that uses libcdaudio. 
Original commit message from CVS:
First attempt at a cd player plugins that uses libcdaudio.
2002-12-30 18:01:31 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.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.
*/
#include <cdaudio.h>
#include <gst/gst.h>
#define GST_TYPE_CDAUDIO (gst_cdaudio_get_type())
#define GST_CDAUDIO(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CDAUDIO,GstCDAudio))
#define GST_CDAUDIO_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CDAUDIO,GstCDAudioClass))
#define GST_IS_CDAUDIO(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CDAUDIO))
#define GST_IS_CDAUDIO_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CDAUDIO))
typedef struct _GstCDAudio GstCDAudio;
typedef struct _GstCDAudioClass GstCDAudioClass;
struct _GstCDAudio {
GstBin element;
/* properties */
gchar *device;
gint cd_desc;
gulong discid;
gboolean was_playing;
struct disc_info info;
struct disc_volume volume;
GTimer *timer;
};
struct _GstCDAudioClass {
GstBinClass parent_class;
void (*close_tray) (GstElement *element);
/* signal callbacks */
void (*track_change) (GstElement *element, guint track);
};
/* props */
enum
{
ARG_0,
ARG_DEVICE,
ARG_DISCID,
ARG_VOLUME_FR,
ARG_VOLUME_FL,
ARG_VOLUME_BR,
ARG_VOLUME_BL,
};
/* signals */
enum
{
TRACK_CHANGE,
LAST_SIGNAL,
};
static void gst_cdaudio_class_init (GstCDAudioClass *klass);
static void gst_cdaudio_init (GstCDAudio *cdaudio);
static void gst_cdaudio_dispose (GObject *object);
static void gst_cdaudio_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *spec);
static void gst_cdaudio_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *spec);
static GstElementStateReturn
gst_cdaudio_change_state (GstElement * element);
static const GstEventMask* gst_cdaudio_get_event_masks (GstElement *element);
static gboolean gst_cdaudio_send_event (GstElement *element, GstEvent *event);
static const GstFormat* gst_cdaudio_get_formats (GstElement *element);
static gboolean gst_cdaudio_convert (GstElement *element,
GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static const GstQueryType* gst_cdaudio_get_query_types (GstElement *element);
static gboolean gst_cdaudio_query (GstElement *element, GstQueryType type,
GstFormat *format, gint64 *value);
static GstFormat track_format;
static GstFormat sector_format;
static GstElementClass *parent_class;
static guint gst_cdaudio_signals[LAST_SIGNAL] = { 0 };
static GstElementDetails gst_cdaudio_details = {
"CD Player",
"Generic/Bin",
"Play CD audio through the CD Drive",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2002",
};
GType
gst_cdaudio_get_type (void)
{
static GType gst_cdaudio_type = 0;
if (!gst_cdaudio_type) {
static const GTypeInfo gst_cdaudio_info = {
sizeof (GstCDAudioClass),
NULL,
NULL,
(GClassInitFunc) gst_cdaudio_class_init,
NULL,
NULL,
sizeof (GstCDAudio),
0,
(GInstanceInitFunc) gst_cdaudio_init,
NULL
};
gst_cdaudio_type = g_type_register_static (GST_TYPE_BIN, "GstCDAudio", &gst_cdaudio_info, 0);
track_format = gst_format_register ("track", "CD track");
sector_format = gst_format_register ("sector", "CD sector");
}
return gst_cdaudio_type;
}
static void
gst_cdaudio_class_init (GstCDAudioClass * 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->set_property = gst_cdaudio_set_property;
gobject_klass->get_property = gst_cdaudio_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_DISCID,
g_param_spec_ulong ("discid", "Disc ID", "CDDB Disc ID",
0, G_MAXULONG, 0, G_PARAM_READABLE));
g_object_class_install_property (gobject_klass, ARG_VOLUME_FL,
g_param_spec_int ("volume_fl", "Volume fl", "Front left volume",
0, 255, 255, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_VOLUME_FR,
g_param_spec_int ("volume_fr", "Volume fr", "Front right volume",
0, 255, 255, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_VOLUME_BL,
g_param_spec_int ("volume_bl", "Volume bl", "Back left volume",
0, 255, 255, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_VOLUME_BR,
g_param_spec_int ("volume_br", "Volume br", "Back right volume",
0, 255, 255, G_PARAM_READWRITE));
gst_cdaudio_signals[TRACK_CHANGE] =
g_signal_new ("track_change", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstCDAudioClass, track_change), NULL, NULL,
gst_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_cdaudio_dispose);
gstelement_klass->change_state = GST_DEBUG_FUNCPTR (gst_cdaudio_change_state);
gstelement_klass->get_event_masks = GST_DEBUG_FUNCPTR (gst_cdaudio_get_event_masks);
gstelement_klass->send_event = GST_DEBUG_FUNCPTR (gst_cdaudio_send_event);
gstelement_klass->get_formats = GST_DEBUG_FUNCPTR (gst_cdaudio_get_formats);
gstelement_klass->convert = GST_DEBUG_FUNCPTR (gst_cdaudio_convert);
gstelement_klass->get_query_types = GST_DEBUG_FUNCPTR (gst_cdaudio_get_query_types);
gstelement_klass->query = GST_DEBUG_FUNCPTR (gst_cdaudio_query);
}
static void
gst_cdaudio_init (GstCDAudio * cdaudio)
{
cdaudio->device = g_strdup ("/dev/cdrom");
cdaudio->was_playing = FALSE;
cdaudio->timer = g_timer_new ();
GST_FLAG_SET (cdaudio, GST_BIN_FLAG_MANAGER);
GST_FLAG_SET (cdaudio, GST_BIN_SELF_SCHEDULABLE);
}
static void
gst_cdaudio_dispose (GObject * object)
{
GstCDAudio *cdaudio;
cdaudio = GST_CDAUDIO (object);
g_timer_destroy (cdaudio->timer);
g_free (cdaudio->device);
if (G_OBJECT_CLASS (parent_class)->dispose) {
G_OBJECT_CLASS (parent_class)->dispose (object);
}
}
static void
gst_cdaudio_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * spec)
{
GstCDAudio *cdaudio;
g_return_if_fail (GST_IS_CDAUDIO (object));
cdaudio = GST_CDAUDIO (object);
switch (prop_id) {
case ARG_DEVICE:
break;
case ARG_VOLUME_FR:
break;
case ARG_VOLUME_FL:
break;
case ARG_VOLUME_BR:
break;
case ARG_VOLUME_BL:
break;
default:
break;
}
}
static void
gst_cdaudio_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * spec)
{
GstCDAudio *cdaudio;
g_return_if_fail (GST_IS_CDAUDIO (object));
cdaudio = GST_CDAUDIO (object);
switch (prop_id) {
case ARG_DEVICE:
g_value_set_string (value, cdaudio->device);
break;
case ARG_DISCID:
g_value_set_ulong (value, cdaudio->discid);
break;
case ARG_VOLUME_FR:
g_value_set_int (value, cdaudio->volume.vol_front.right);
break;
case ARG_VOLUME_FL:
g_value_set_int (value, cdaudio->volume.vol_front.left);
break;
case ARG_VOLUME_BR:
g_value_set_int (value, cdaudio->volume.vol_back.right);
break;
case ARG_VOLUME_BL:
g_value_set_int (value, cdaudio->volume.vol_back.left);
break;
default:
break;
}
}
static void
print_track_info (GstCDAudio *cdaudio)
{
gint i;
for (i = 0; i < cdaudio->info.disc_total_tracks; i++) {
g_print ("%d %d:%02d\n", i,
cdaudio->info.disc_track[i].track_length.minutes,
cdaudio->info.disc_track[i].track_length.seconds);
}
}
static GstElementStateReturn
gst_cdaudio_change_state (GstElement * element)
{
GstCDAudio *cdaudio;
cdaudio = GST_CDAUDIO (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
cdaudio->cd_desc = cd_init_device(cdaudio->device);
if (cdaudio->cd_desc < 0)
return GST_STATE_FAILURE;
/* close tray */
if (cd_close (cdaudio->cd_desc) < 0)
return GST_STATE_FAILURE;
if (cd_stat (cdaudio->cd_desc, &cdaudio->info) < 0)
return GST_STATE_FAILURE;
print_track_info (cdaudio);
cdaudio->discid = cddb_discid (cdaudio->cd_desc);
g_object_notify (G_OBJECT (cdaudio), "discid");
cdaudio->was_playing = FALSE;
break;
case GST_STATE_PAUSED_TO_PLAYING:
{
gint res;
if (cdaudio->was_playing)
res = cd_resume (cdaudio->cd_desc);
else
res = cd_play (cdaudio->cd_desc, 1);
if (res < 0)
return GST_STATE_FAILURE;
cdaudio->was_playing = TRUE;
g_timer_start (cdaudio->timer);
break;
}
case GST_STATE_PLAYING_TO_PAUSED:
if (cd_pause (cdaudio->cd_desc) < 0)
return GST_STATE_FAILURE;
g_timer_stop (cdaudio->timer);
break;
case GST_STATE_PAUSED_TO_READY:
if (cd_stop (cdaudio->cd_desc) < 0)
return GST_STATE_FAILURE;
if (cd_finish (cdaudio->cd_desc) < 0)
return GST_STATE_FAILURE;
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state) {
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
}
return GST_STATE_SUCCESS;
}
GST_ELEMENT_EVENT_MASK_FUNCTION (gst_cdaudio_get_event_masks,
{ GST_EVENT_SEEK, GST_SEEK_FLAG_FLUSH },
{ GST_EVENT_SEEK_SEGMENT, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_SEGMENT_LOOP }
)
gboolean
gst_cdaudio_send_event (GstElement *element, GstEvent *event)
{
GstCDAudio *cdaudio;
gboolean res = TRUE;
cdaudio = GST_CDAUDIO (element);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
switch (GST_EVENT_SEEK_FORMAT (event)) {
case GST_FORMAT_TIME:
{
struct disc_timeval time;
time.minutes = GST_EVENT_SEEK_OFFSET (event) / (60 * GST_SECOND);
time.seconds = (GST_EVENT_SEEK_OFFSET (event) / GST_SECOND) % 60;
cd_advance (cdaudio->cd_desc, time);
break;
}
default:
res = FALSE;
break;
}
break;
default:
res = FALSE;
break;
}
gst_event_unref (event);
return res;
}
const GstFormat*
gst_cdaudio_get_formats (GstElement *element)
{
static GstFormat formats[] = {
GST_FORMAT_TIME,
GST_FORMAT_BYTES,
GST_FORMAT_UNITS,
0, /* fillted below */
0, /* fillted below */
0,
};
formats[3] = track_format;
formats[4] = sector_format;
return formats;
}
gboolean
gst_cdaudio_convert (GstElement *element,
GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
return FALSE;
}
const GstQueryType*
gst_cdaudio_get_query_types (GstElement *element)
{
static const GstQueryType query_types[] = {
GST_QUERY_TOTAL,
GST_QUERY_POSITION,
GST_QUERY_START,
GST_QUERY_SEGMENT_END,
0
};
return query_types;
}
gboolean
gst_cdaudio_query (GstElement *element, GstQueryType type,
GstFormat *format, gint64 *value)
{
GstCDAudio *cdaudio;
gboolean res = TRUE;
gulong micros;
gdouble seconds;
cdaudio = GST_CDAUDIO (element);
/* take new snapshot every 100000 miliseconds */
seconds = g_timer_elapsed (cdaudio->timer, &micros);
if (micros > 100000) {
cd_stat (cdaudio->cd_desc, &cdaudio->info);
g_timer_start (cdaudio->timer);
}
switch (type) {
case GST_QUERY_TOTAL:
switch (*format) {
case GST_FORMAT_DEFAULT:
*format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
*value = (cdaudio->info.disc_length.minutes * 60 +
cdaudio->info.disc_length.seconds) * GST_SECOND;
break;
default:
{
if (*format == track_format) {
*value = cdaudio->info.disc_total_tracks;
}
else {
res = FALSE;
}
break;
}
}
break;
case GST_QUERY_POSITION:
switch (*format) {
case GST_FORMAT_DEFAULT:
*format = GST_FORMAT_TIME;
case GST_FORMAT_TIME:
*value = (cdaudio->info.disc_time.minutes * 60 +
cdaudio->info.disc_time.seconds) * GST_SECOND;
break;
default:
{
if (*format == track_format) {
*value = cdaudio->info.disc_current_track;
}
else {
res = FALSE;
}
break;
}
}
break;
default:
res = FALSE;
break;
}
return res;
}
static gboolean
plugin_init (GModule * module, GstPlugin * plugin)
{
GstElementFactory *factory;
factory = gst_element_factory_new ("cdaudio", GST_TYPE_CDAUDIO, &gst_cdaudio_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,
"cdaudio",
plugin_init
};
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