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make mad use g_object_notify instead of events - includes creation of properties

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Original commit message from CVS:
make mad use g_object_notify instead of events - includes creation of properties
This commit is contained in:
Benjamin Otte 2002-02-06 18:10:35 +00:00
parent f5e21a92f3
commit d08e532655
2 changed files with 104 additions and 17 deletions
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2
common

@ -1 +1 @@
Subproject commit 48638606945e579672f97b09cb797de3e6aee9e7
Subproject commit c2d7711457d468d527890f2057883c133b50c3b7

117
ext/mad/gstmad.c
View file

@ -83,6 +83,12 @@ enum {
enum {
ARG_0,
ARG_LAYER,
ARG_MODE,
ARG_EMPHASIS,
ARG_BITRATE,
ARG_SAMPLERATE,
ARG_CHANNELS,
/* FILL ME */
};
@ -120,6 +126,11 @@ static void gst_mad_class_init (GstMadClass *klass);
static void gst_mad_init (GstMad *mad);
static void gst_mad_dispose (GObject *object);
static void gst_mad_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_mad_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static void gst_mad_chain (GstPad *pad, GstBuffer *buffer);
static GstElementStateReturn
@ -150,6 +161,10 @@ gst_mad_get_type (void)
return mad_type;
}
static gchar *layers[] = { "unknown", "I", "II", "III" };
static gchar *modes[] = { "single channel", "dual channel", "joint stereo", "stereo" };
static gchar *emphases[] = { "none", "50/15 microseconds", "CCITT J.17" };
static void
gst_mad_class_init (GstMadClass *klass)
{
@ -161,9 +176,34 @@ gst_mad_class_init (GstMadClass *klass)
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->set_property = gst_mad_set_property;
gobject_class->get_property = gst_mad_get_property;
gobject_class->dispose = gst_mad_dispose;
gstelement_class->change_state = gst_mad_change_state;
/* init properties */
/* currently, string representations are used, we might want to change that */
/* FIXME: descriptions need to be more technical, default values and ranges need to be selected right */
g_object_class_install_property (gobject_class, ARG_LAYER,
g_param_spec_string ("layer", "Layer", "The audio MPEG Layer this stream is encoded in",
layers[0], G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_MODE,
g_param_spec_string ("mode", "Mode", "The current mode of the channels",
modes[0], G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_EMPHASIS,
g_param_spec_string ("emphasis", "Emphasis", "Emphasis",
emphases[0], G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_BITRATE,
g_param_spec_int ("bitrate", "Bitrate", "current bitrate of the stream",
0, G_MAXINT, 0, G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_SAMPLERATE,
g_param_spec_int ("samplerate", "Samplerate", "current samplerate of the stream",
0, G_MAXINT, 0, G_PARAM_READABLE));
g_object_class_install_property (gobject_class, ARG_CHANNELS,
g_param_spec_int ("channels", "Channels", "number of channels",
1, 2, 1, G_PARAM_READABLE));
}
static void
@ -215,35 +255,82 @@ scale (mad_fixed_t sample)
return sample >> (MAD_F_FRACBITS + 1 - 16);
}
static gchar *layers[] = { "unknown", "I", "II", "III" };
static gchar *modes[] = { "single channel", "dual channel", "joint stereo", "stereo" };
static gchar *emphases[] = { "none", "50/15 microseconds", "CCITT J.17" };
/* do we need this function? */
static void
gst_mad_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstMad *mad;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_MAD (object));
mad = GST_MAD (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mad_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstMad *mad;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_MAD (object));
mad = GST_MAD (object);
switch (prop_id) {
case ARG_LAYER:
g_value_set_string (value, layers[mad->header.layer]);
break;
case ARG_MODE:
g_value_set_string (value, modes[mad->header.mode]);
break;
case ARG_EMPHASIS:
g_value_set_string (value, emphases[mad->header.emphasis]);
break;
case ARG_BITRATE:
g_value_set_int (value, mad->header.bitrate);
break;
case ARG_SAMPLERATE:
g_value_set_int (value, mad->header.samplerate);
break;
case ARG_CHANNELS:
g_value_set_int (value, mad->channels);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mad_update_info (GstMad *mad, struct mad_header const *header)
{
#define CHECK_HEADER(h1,str,prop) \
#define CHECK_HEADER(h1,str) \
G_STMT_START{ \
if (mad->header.h1 != header->h1 || mad->new_header) { \
mad->header.h1 = header->h1; \
gst_element_send_event (GST_ELEMENT (mad), \
gst_event_new_info (str, prop, NULL)); \
g_object_notify (G_OBJECT (mad), str); \
}; \
} G_STMT_END
CHECK_HEADER (layer, "layer", GST_PROPS_STRING (layers[header->layer]));
CHECK_HEADER (mode, "mode", GST_PROPS_STRING (modes[header->mode]));
CHECK_HEADER (emphasis, "emphasis", GST_PROPS_STRING (emphases[header->emphasis]));
CHECK_HEADER (bitrate, "bitrate", GST_PROPS_INT (header->bitrate));
CHECK_HEADER (samplerate, "samplerate", GST_PROPS_INT (header->samplerate));
g_object_freeze_notify (G_OBJECT (mad));
CHECK_HEADER (layer, "layer");
CHECK_HEADER (mode, "mode");
CHECK_HEADER (emphasis, "emphasis");
CHECK_HEADER (bitrate, "bitrate");
CHECK_HEADER (samplerate, "samplerate");
if (mad->channels != MAD_NCHANNELS (header) || mad->new_header) {
mad->channels = MAD_NCHANNELS (header);
gst_element_send_event (GST_ELEMENT (mad),
gst_event_new_info ("channels", GST_PROPS_INT (mad->channels), NULL));
g_object_notify (G_OBJECT (mad), "channels");
}
mad->new_header = FALSE;
g_object_thaw_notify (G_OBJECT (mad));
#undef CHECK_HEADER
}
static void