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gstreamer/sys/v4l/gstv4lelement.c
Ronald S. Bultje d26a6881a9 Re-add v4lelement as an actual element. Useless within pipes but extremely useful in generic video4linux audodetectio... 
Original commit message from CVS:
Re-add v4lelement as an actual element. Useless within pipes but extremely useful in generic video4linux audodetection of features and such
2002-02-04 19:45:56 +00:00

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/* G-Streamer generic V4L element - generic V4L calls handling
* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* 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 "v4l_calls.h"
static GstElementDetails gst_v4lelement_details = {
"Generic video4linux Element",
"None/Video",
"Generic plugin for handling common video4linux calls",
VERSION,
"Ronald Bultje <rbultje@ronald.bitfreak.net>",
"(C) 2001",
};
/* V4lElement signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_CHANNEL,
ARG_CHANNEL_NAME,
ARG_NORM,
ARG_NORM_NAME,
ARG_HAS_TUNER,
ARG_FREQUENCY,
ARG_HAS_AUDIO,
ARG_MUTE,
ARG_MODE,
ARG_VOLUME,
ARG_HUE,
ARG_BRIGHTNESS,
ARG_CONTRAST,
ARG_SATURATION,
ARG_DEVICE,
ARG_DEVICE_NAME,
ARG_DEVICE_IS_CAPTURE,
ARG_DEVICE_IS_OVERLAY,
ARG_DEVICE_IS_MJPEG_CAPTURE,
ARG_DEVICE_IS_MJPEG_PLAYBACK,
ARG_DEVICE_IS_MPEG_CAPTURE,
ARG_DEVICE_IS_MPEG_PLAYBACK
};
static void gst_v4lelement_class_init (GstV4lElementClass *klass);
static void gst_v4lelement_init (GstV4lElement *v4lelement);
static void gst_v4lelement_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gst_v4lelement_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static GstElementStateReturn gst_v4lelement_change_state (GstElement *element);
static gboolean plugin_init (GModule *module,
GstPlugin *plugin);
static GstElementClass *parent_class = NULL;
//static guint gst_v4lelement_signals[LAST_SIGNAL] = { 0 };
GType
gst_v4lelement_get_type (void)
{
static GType v4lelement_type = 0;
if (!v4lelement_type) {
static const GTypeInfo v4lelement_info = {
sizeof(GstV4lElementClass),
NULL,
NULL,
(GClassInitFunc)gst_v4lelement_class_init,
NULL,
NULL,
sizeof(GstV4lElement),
0,
(GInstanceInitFunc)gst_v4lelement_init,
NULL
};
v4lelement_type = g_type_register_static(GST_TYPE_ELEMENT, "GstV4lElement", &v4lelement_info, 0);
}
return v4lelement_type;
}
static void
gst_v4lelement_class_init (GstV4lElementClass *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_CHANNEL,
g_param_spec_int("channel","channel","channel",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CHANNEL_NAME,
g_param_spec_string("channel_name","channel_name","channel_name",
NULL, G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NORM,
g_param_spec_int("norm","norm","norm",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NORM_NAME,
g_param_spec_string("norm_name","norm_name","norm_name",
NULL, G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HAS_TUNER,
g_param_spec_boolean("has_tuner","has_tuner","has_tuner",
0,G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FREQUENCY,
g_param_spec_ulong("frequency","frequency","frequency",
0,G_MAXULONG,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HAS_AUDIO,
g_param_spec_boolean("has_audio","has_audio","has_audio",
0,G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_MUTE,
g_param_spec_boolean("mute","mute","mute",
0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_VOLUME,
g_param_spec_int("volume","volume","volume",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_MODE,
g_param_spec_int("mode","mode","mode",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HUE,
g_param_spec_int("hue","hue","hue",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BRIGHTNESS,
g_param_spec_int("brightness","brightness","brightness",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CONTRAST,
g_param_spec_int("contrast","contrast","contrast",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SATURATION,
g_param_spec_int("saturation","saturation","saturation",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE,
g_param_spec_string("device","device","device",
NULL, G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_NAME,
g_param_spec_string("device_name","device_name","device_name",
NULL, G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_IS_CAPTURE,
g_param_spec_boolean("can_capture","can_capture","can_capture",
0,G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_IS_OVERLAY,
g_param_spec_boolean("has_overlay","has_overlay","has_overlay",
0,G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_IS_MJPEG_CAPTURE,
g_param_spec_boolean("can_capture_mjpeg","can_capture_mjpeg","can_capture_mjpeg",
0,G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_IS_MJPEG_PLAYBACK,
g_param_spec_boolean("can_playback_mjpeg","can_playback_mjpeg","can_playback_mjpeg",
0,G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_IS_MPEG_CAPTURE,
g_param_spec_boolean("can_capture_mpeg","can_capture_mpeg","can_capture_mpeg",
0,G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_IS_MPEG_PLAYBACK,
g_param_spec_boolean("can_playback_mpeg","can_playback_mpeg","can_playback_mpeg",
0,G_PARAM_READABLE));
gobject_class->set_property = gst_v4lelement_set_property;
gobject_class->get_property = gst_v4lelement_get_property;
gstelement_class->change_state = gst_v4lelement_change_state;
}
static void
gst_v4lelement_init (GstV4lElement *v4lelement)
{
/* some default values */
v4lelement->video_fd = -1;
v4lelement->buffer = NULL;
v4lelement->videodev = NULL;
v4lelement->norm = -1;
v4lelement->channel = -1; /* the first channel */
v4lelement->frequency = 0;
v4lelement->mute = FALSE;
v4lelement->volume = -1;
v4lelement->mode = -1;
v4lelement->brightness = -1;
v4lelement->hue = -1;
v4lelement->contrast = -1;
v4lelement->saturation = -1;
}
static void
gst_v4lelement_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GstV4lElement *v4lelement;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_V4LELEMENT(object));
v4lelement = GST_V4LELEMENT(object);
switch (prop_id)
{
case ARG_CHANNEL:
v4lelement->channel = g_value_get_int(value);
if (GST_V4L_IS_OPEN(v4lelement) && !GST_V4L_IS_ACTIVE(v4lelement))
{
if (v4lelement->norm >= VIDEO_MODE_PAL &&
v4lelement->norm < VIDEO_MODE_AUTO &&
v4lelement->channel >= 0)
if (!gst_v4l_set_chan_norm(v4lelement, v4lelement->channel, v4lelement->norm))
return;
}
break;
case ARG_NORM:
v4lelement->norm = g_value_get_int(value);
if (GST_V4L_IS_OPEN(v4lelement) && !GST_V4L_IS_ACTIVE(v4lelement))
{
if (v4lelement->norm >= VIDEO_MODE_PAL &&
v4lelement->norm < VIDEO_MODE_AUTO &&
v4lelement->channel >= 0)
if (!gst_v4l_set_chan_norm(v4lelement, v4lelement->channel, v4lelement->norm))
return;
}
break;
case ARG_FREQUENCY:
v4lelement->frequency = g_value_get_ulong(value);
if (GST_V4L_IS_OPEN(v4lelement) && !GST_V4L_IS_ACTIVE(v4lelement))
{
if (gst_v4l_has_tuner(v4lelement))
if (!gst_v4l_set_frequency(v4lelement, v4lelement->frequency))
return;
}
break;
case ARG_MUTE:
v4lelement->mute = g_value_get_boolean(value);
if (GST_V4L_IS_OPEN(v4lelement))
{
if (gst_v4l_has_audio(v4lelement))
if (!gst_v4l_set_audio(v4lelement, V4L_AUDIO_MUTE, v4lelement->mute))
return;
}
break;
case ARG_MODE:
v4lelement->mode = g_value_get_int(value);
if (GST_V4L_IS_OPEN(v4lelement))
{
if (!gst_v4l_set_audio(v4lelement, V4L_AUDIO_MODE, v4lelement->mute))
return;
}
break;
case ARG_VOLUME:
v4lelement->volume = g_value_get_int(value);
if (GST_V4L_IS_OPEN(v4lelement))
{
if (!gst_v4l_set_audio(v4lelement, V4L_AUDIO_VOLUME, v4lelement->volume))
return;
}
break;
case ARG_HUE:
v4lelement->hue = g_value_get_int(value);
if (GST_V4L_IS_OPEN(v4lelement))
{
if (!gst_v4l_set_picture(v4lelement, V4L_PICTURE_HUE, v4lelement->hue))
return;
}
break;
case ARG_BRIGHTNESS:
v4lelement->brightness = g_value_get_int(value);
if (GST_V4L_IS_OPEN(v4lelement))
{
if (!gst_v4l_set_picture(v4lelement, V4L_PICTURE_BRIGHTNESS, v4lelement->brightness))
return;
}
break;
case ARG_CONTRAST:
v4lelement->contrast = g_value_get_int(value);
if (GST_V4L_IS_OPEN(v4lelement))
{
if (!gst_v4l_set_picture(v4lelement, V4L_PICTURE_CONTRAST, v4lelement->contrast))
return;
}
break;
case ARG_SATURATION:
v4lelement->saturation = g_value_get_int(value);
if (GST_V4L_IS_OPEN(v4lelement))
{
if (!gst_v4l_set_picture(v4lelement, V4L_PICTURE_SATURATION, v4lelement->saturation))
return;
}
break;
case ARG_DEVICE:
if (GST_V4L_IS_OPEN(v4lelement))
break; /* only set when *not* open */
if (v4lelement->videodev)
g_free(v4lelement->videodev);
v4lelement->videodev = g_strdup(g_value_get_string(value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_v4lelement_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GstV4lElement *v4lelement;
gint temp_i = 0;
gulong temp_ul = 0;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_V4LELEMENT(object));
v4lelement = GST_V4LELEMENT(object);
switch (prop_id)
{
case ARG_CHANNEL:
if (GST_V4L_IS_OPEN(v4lelement))
gst_v4l_get_chan_norm(v4lelement, &temp_i, NULL);
g_value_set_int(value, temp_i);
break;
case ARG_CHANNEL_NAME:
if (GST_V4L_IS_OPEN(v4lelement))
g_value_set_string(value, g_strdup(v4lelement->vchan.name));
else
g_value_set_string(value, g_strdup("Unknown"));
break;
case ARG_NORM:
if (GST_V4L_IS_OPEN(v4lelement))
gst_v4l_get_chan_norm(v4lelement, NULL, &temp_i);
g_value_set_int(value, temp_i);
break;
case ARG_NORM_NAME:
if (GST_V4L_IS_OPEN(v4lelement))
{
gst_v4l_get_chan_norm(v4lelement, NULL, &temp_i);
g_value_set_string(value, g_strdup(norm_name[temp_i]));
}
else
g_value_set_string(value, g_strdup("Unknwon"));
break;
case ARG_HAS_TUNER:
g_value_set_boolean(value, FALSE);
if (GST_V4L_IS_OPEN(v4lelement))
if (gst_v4l_has_tuner(v4lelement))
g_value_set_boolean(value, TRUE);
break;
case ARG_FREQUENCY:
if (GST_V4L_IS_OPEN(v4lelement))
if (gst_v4l_has_tuner(v4lelement))
gst_v4l_get_frequency(v4lelement, &temp_ul);
g_value_set_ulong(value, temp_ul);
break;
case ARG_HAS_AUDIO:
g_value_set_boolean(value, FALSE);
if (GST_V4L_IS_OPEN(v4lelement))
if (gst_v4l_has_audio(v4lelement))
g_value_set_boolean(value, TRUE);
break;
case ARG_MUTE:
if (GST_V4L_IS_OPEN(v4lelement))
if (gst_v4l_has_audio(v4lelement))
gst_v4l_get_audio(v4lelement, V4L_AUDIO_MUTE, &temp_i);
g_value_set_boolean(value, temp_i?TRUE:FALSE);
break;
case ARG_MODE:
if (GST_V4L_IS_OPEN(v4lelement))
if (gst_v4l_has_tuner(v4lelement))
gst_v4l_get_audio(v4lelement, V4L_AUDIO_MODE, &temp_i);
g_value_set_int(value, temp_i);
break;
case ARG_VOLUME:
if (GST_V4L_IS_OPEN(v4lelement))
if (gst_v4l_has_tuner(v4lelement))
gst_v4l_get_audio(v4lelement, V4L_AUDIO_VOLUME, &temp_i);
g_value_set_int(value, temp_i);
break;
case ARG_HUE:
if (GST_V4L_IS_OPEN(v4lelement))
gst_v4l_get_picture(v4lelement, V4L_PICTURE_HUE, &temp_i);
g_value_set_int(value, temp_i);
break;
case ARG_BRIGHTNESS:
if (GST_V4L_IS_OPEN(v4lelement))
gst_v4l_get_picture(v4lelement, V4L_PICTURE_BRIGHTNESS, &temp_i);
g_value_set_int(value, temp_i);
break;
case ARG_CONTRAST:
if (GST_V4L_IS_OPEN(v4lelement))
gst_v4l_get_picture(v4lelement, V4L_PICTURE_CONTRAST, &temp_i);
g_value_set_int(value, temp_i);
break;
case ARG_SATURATION:
if (GST_V4L_IS_OPEN(v4lelement))
gst_v4l_get_picture(v4lelement, V4L_PICTURE_SATURATION, &temp_i);
g_value_set_int(value, temp_i);
break;
case ARG_DEVICE:
g_value_set_string(value, g_strdup(v4lelement->videodev?v4lelement->videodev:"/dev/video"));
break;
case ARG_DEVICE_NAME:
if (GST_V4L_IS_OPEN(v4lelement))
g_value_set_string(value, g_strdup(v4lelement->vcap.name));
else
g_value_set_string(value, g_strdup("None"));
break;
case ARG_DEVICE_IS_CAPTURE:
g_value_set_boolean(value, FALSE);
if (GST_V4L_IS_OPEN(v4lelement))
g_value_set_boolean(value, v4lelement->vcap.type & VID_TYPE_CAPTURE);
break;
case ARG_DEVICE_IS_OVERLAY:
g_value_set_boolean(value, FALSE);
if (GST_V4L_IS_OPEN(v4lelement))
g_value_set_boolean(value, v4lelement->vcap.type & VID_TYPE_OVERLAY);
break;
case ARG_DEVICE_IS_MJPEG_CAPTURE:
g_value_set_boolean(value, FALSE);
if (GST_V4L_IS_OPEN(v4lelement))
g_value_set_boolean(value, v4lelement->vcap.type & VID_TYPE_MJPEG_ENCODER);
break;
case ARG_DEVICE_IS_MJPEG_PLAYBACK:
g_value_set_boolean(value, FALSE);
if (GST_V4L_IS_OPEN(v4lelement))
g_value_set_boolean(value, v4lelement->vcap.type & VID_TYPE_MJPEG_DECODER);
break;
case ARG_DEVICE_IS_MPEG_CAPTURE:
g_value_set_boolean(value, FALSE);
if (GST_V4L_IS_OPEN(v4lelement))
g_value_set_boolean(value, v4lelement->vcap.type & VID_TYPE_MPEG_ENCODER);
break;
case ARG_DEVICE_IS_MPEG_PLAYBACK:
g_value_set_boolean(value, FALSE);
if (GST_V4L_IS_OPEN(v4lelement))
g_value_set_boolean(value, v4lelement->vcap.type & VID_TYPE_MPEG_DECODER);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_v4lelement_change_state (GstElement *element)
{
GstV4lElement *v4lelement;
g_return_val_if_fail(GST_IS_V4LELEMENT(element), GST_STATE_FAILURE);
v4lelement = GST_V4LELEMENT(element);
/* if going down into NULL state, close the device if it's open
* if going to READY, open the device (and set some options)
*/
switch (GST_STATE_TRANSITION(element))
{
case GST_STATE_NULL_TO_READY:
{
int n, temp;
if (!gst_v4l_open(v4lelement))
return GST_STATE_FAILURE;
/* now, sync options */
if (v4lelement->norm >= VIDEO_MODE_PAL &&
v4lelement->norm < VIDEO_MODE_AUTO &&
v4lelement->channel >= 0)
{
if (!gst_v4l_set_chan_norm(v4lelement, v4lelement->channel, v4lelement->norm))
return GST_STATE_FAILURE;
}
if (v4lelement->frequency > 0 && gst_v4l_has_tuner(v4lelement))
{
if (!gst_v4l_set_frequency(v4lelement, v4lelement->frequency))
return GST_STATE_FAILURE;
}
for (n=V4L_AUDIO_VOLUME;n<=V4L_AUDIO_MODE;n++)
{
switch (n)
{
case V4L_AUDIO_MUTE: temp = v4lelement->mute; break;
case V4L_AUDIO_VOLUME: temp = v4lelement->volume; break;
case V4L_AUDIO_MODE: temp = v4lelement->mode; break;
}
if (temp >= 0 && gst_v4l_has_audio(v4lelement))
{
if (!gst_v4l_set_audio(v4lelement, n, temp))
return GST_STATE_FAILURE;
}
}
for (n=V4L_PICTURE_HUE;n<=V4L_PICTURE_SATURATION;n++)
{
switch (n)
{
case V4L_PICTURE_HUE: temp = v4lelement->hue; break;
case V4L_PICTURE_BRIGHTNESS: temp = v4lelement->brightness; break;
case V4L_PICTURE_SATURATION: temp = v4lelement->saturation; break;
case V4L_PICTURE_CONTRAST: temp = v4lelement->contrast; break;
}
if (temp >= 0)
{
if (!gst_v4l_set_picture(v4lelement, n, temp))
return GST_STATE_FAILURE;
}
}
}
break;
case GST_STATE_READY_TO_NULL:
if (!gst_v4l_close(v4lelement))
return GST_STATE_FAILURE;
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 (GModule *module,
GstPlugin *plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the v4lelement */
factory = gst_elementfactory_new("v4lelement", GST_TYPE_V4LELEMENT,
&gst_v4lelement_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"v4lelement",
plugin_init
};
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