mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-08 18:39:54 +00:00
3ec5a0a054
Original commit message from CVS: this adds video4linux2 source and element plugins. The division in v4l2* plugins is the same as for v4l1 - i.e. an element, a src and a sink, but there won't be separate encoding plugins (like v4lmjpegsrc) - all functionality is (thanks to video4linux2) integrated in one plugin: v4l2src. v4l2sink is still to be done, that'll come later.
493 lines
15 KiB
C
493 lines
15 KiB
C
/* G-Streamer generic V4L2 element
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* Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "v4l2_calls.h"
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static GstElementDetails gst_v4l2element_details = {
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"Generic video4linux2 Element",
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"None/Video",
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"Generic plugin for handling common video4linux2 calls",
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VERSION,
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"Ronald Bultje <rbultje@ronald.bitfreak.net>",
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"(C) 2002",
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};
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/* V4l2Element signals and args */
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enum {
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/* FILL ME */
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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ARG_CHANNEL,
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ARG_CHANNEL_NAMES,
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ARG_OUTPUT,
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ARG_OUTPUT_NAMES,
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ARG_NORM,
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ARG_NORM_NAMES,
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ARG_HAS_TUNER,
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ARG_FREQUENCY,
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ARG_SIGNAL_STRENGTH,
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ARG_HAS_AUDIO,
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ARG_ATTRIBUTE,
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ARG_ATTRIBUTE_SETS,
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ARG_DEVICE,
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ARG_DEVICE_NAME,
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ARG_DEVICE_HAS_CAPTURE,
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ARG_DEVICE_HAS_OVERLAY,
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ARG_DEVICE_HAS_CODEC,
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ARG_DISPLAY,
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ARG_VIDEOWINDOW,
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ARG_CLIPPING,
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ARG_DO_OVERLAY,
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};
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static void gst_v4l2element_class_init (GstV4l2ElementClass *klass);
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static void gst_v4l2element_init (GstV4l2Element *v4lelement);
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static void gst_v4l2element_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gst_v4l2element_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static GstElementStateReturn gst_v4l2element_change_state (GstElement *element);
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static GstElementClass *parent_class = NULL;
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/*static guint gst_v4l2element_signals[LAST_SIGNAL] = { 0 }; */
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GType
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gst_v4l2element_get_type (void)
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{
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static GType v4l2element_type = 0;
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if (!v4l2element_type) {
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static const GTypeInfo v4l2element_info = {
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sizeof(GstV4l2ElementClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_v4l2element_class_init,
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NULL,
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NULL,
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sizeof(GstV4l2Element),
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0,
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(GInstanceInitFunc) gst_v4l2element_init,
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NULL
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};
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v4l2element_type = g_type_register_static(GST_TYPE_ELEMENT,
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"GstV4l2Element", &v4l2element_info, 0);
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}
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return v4l2element_type;
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}
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static void
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gst_v4l2element_class_init (GstV4l2ElementClass *klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass*)klass;
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gstelement_class = (GstElementClass*)klass;
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parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CHANNEL,
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g_param_spec_int("channel","channel","channel",
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G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CHANNEL_NAMES,
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g_param_spec_pointer("channel_names","channel_names","channel_names",
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G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_OUTPUT,
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g_param_spec_int("output","output","output",
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G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_OUTPUT_NAMES,
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g_param_spec_pointer("output_names","output_names","output_names",
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G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NORM,
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g_param_spec_int("norm","norm","norm",
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G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NORM_NAMES,
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g_param_spec_pointer("norm_names","norm_names","norm_names",
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G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HAS_TUNER,
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g_param_spec_boolean("has_tuner","has_tuner","has_tuner",
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0,G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FREQUENCY,
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g_param_spec_ulong("frequency","frequency","frequency",
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0,G_MAXULONG,0,G_PARAM_READWRITE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SIGNAL_STRENGTH,
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g_param_spec_ulong("signal_strength","signal_strength","signal_strength",
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0,G_MAXULONG,0,G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HAS_AUDIO,
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g_param_spec_boolean("has_audio","has_audio","has_audio",
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0,G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_ATTRIBUTE,
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g_param_spec_pointer("attribute","attribute","attribute",
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G_PARAM_READWRITE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_ATTRIBUTE_SETS,
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g_param_spec_pointer("attribute_sets","attribute_sets","attribute_sets",
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G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE,
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g_param_spec_string("device","device","device",
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NULL, G_PARAM_READWRITE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_NAME,
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g_param_spec_string("device_name","device_name","device_name",
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NULL, G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_HAS_CAPTURE,
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g_param_spec_boolean("can_capture","can_capture","can_capture",
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0,G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_HAS_OVERLAY,
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g_param_spec_boolean("has_overlay","has_overlay","has_overlay",
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0,G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE_HAS_CODEC,
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g_param_spec_boolean("has_compression","has_compression","has_compression",
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0,G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DISPLAY,
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g_param_spec_string("display","display","display",
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NULL, G_PARAM_WRITABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DO_OVERLAY,
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g_param_spec_boolean("do_overlay","do_overlay","do_overlay",
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0,G_PARAM_WRITABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_VIDEOWINDOW,
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g_param_spec_pointer("videowindow","videowindow","videowindow",
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G_PARAM_WRITABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CLIPPING,
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g_param_spec_pointer("videowindowclip","videowindowclip","videowindowclip",
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G_PARAM_WRITABLE));
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gobject_class->set_property = gst_v4l2element_set_property;
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gobject_class->get_property = gst_v4l2element_get_property;
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gstelement_class->change_state = gst_v4l2element_change_state;
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}
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static void
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gst_v4l2element_init (GstV4l2Element *v4l2element)
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{
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/* some default values */
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v4l2element->video_fd = -1;
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v4l2element->buffer = NULL;
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v4l2element->device = NULL;
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v4l2element->norm = -1;
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v4l2element->channel = -1;
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v4l2element->output = -1;
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v4l2element->frequency = 0;
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v4l2element->controls = NULL;
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v4l2element->formats = NULL;
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v4l2element->outputs = NULL;
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v4l2element->inputs = NULL;
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v4l2element->norms = NULL;
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}
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static void
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gst_v4l2element_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GstV4l2Element *v4l2element;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail(GST_IS_V4L2ELEMENT(object));
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v4l2element = GST_V4L2ELEMENT(object);
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switch (prop_id) {
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case ARG_CHANNEL:
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v4l2element->channel = g_value_get_int(value);
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if (GST_V4L2_IS_OPEN(v4l2element) && !GST_V4L2_IS_ACTIVE(v4l2element)) {
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if (!gst_v4l2_set_input(v4l2element, g_value_get_int(value)))
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return;
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}
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break;
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case ARG_OUTPUT:
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v4l2element->output = g_value_get_int(value);
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if (GST_V4L2_IS_OPEN(v4l2element) && !GST_V4L2_IS_ACTIVE(v4l2element)) {
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if (!gst_v4l2_set_output(v4l2element, g_value_get_int(value)))
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return;
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}
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break;
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case ARG_NORM:
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v4l2element->norm = g_value_get_int(value);
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if (GST_V4L2_IS_OPEN(v4l2element) && !GST_V4L2_IS_ACTIVE(v4l2element)) {
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if (!gst_v4l2_set_norm(v4l2element, g_value_get_int(value)))
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return;
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}
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break;
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case ARG_FREQUENCY:
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v4l2element->frequency = g_value_get_ulong(value);
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if (GST_V4L2_IS_OPEN(v4l2element) && !GST_V4L2_IS_ACTIVE(v4l2element)) {
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if (!gst_v4l2_set_frequency(v4l2element, g_value_get_ulong(value)))
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return;
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}
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break;
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case ARG_ATTRIBUTE:
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if (GST_V4L2_IS_OPEN(v4l2element)) {
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gst_v4l2_set_attribute(v4l2element,
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((GstV4l2Attribute*)g_value_get_pointer(value))->index,
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((GstV4l2Attribute*)g_value_get_pointer(value))->value);
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}
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break;
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case ARG_DEVICE:
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if (!GST_V4L2_IS_OPEN(v4l2element)) {
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if (v4l2element->device)
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g_free(v4l2element->device);
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v4l2element->device = g_strdup(g_value_get_string(value));
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}
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break;
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case ARG_DISPLAY:
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if (!gst_v4l2_set_display(v4l2element, g_value_get_string(value)))
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return;
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break;
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case ARG_VIDEOWINDOW:
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if (GST_V4L2_IS_OPEN(v4l2element)) {
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gst_v4l2_set_window(v4l2element,
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((GstV4l2Rect*)g_value_get_pointer(value))->x,
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((GstV4l2Rect*)g_value_get_pointer(value))->y,
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((GstV4l2Rect*)g_value_get_pointer(value))->w,
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((GstV4l2Rect*)g_value_get_pointer(value))->h);
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}
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break;
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case ARG_CLIPPING:
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if (GST_V4L2_IS_OPEN(v4l2element)) {
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gint i;
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struct v4l2_clip *clips;
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GList *list = (GList*)g_value_get_pointer(value);
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clips = g_malloc(sizeof(struct v4l2_clip) * g_list_length(list));
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for (i=0;i<g_list_length(list);i++)
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{
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clips[i].x = ((GstV4l2Rect*)g_list_nth_data(list, i))->x;
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clips[i].y = ((GstV4l2Rect*)g_list_nth_data(list, i))->y;
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clips[i].width = ((GstV4l2Rect*)g_list_nth_data(list, i))->w;
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clips[i].height = ((GstV4l2Rect*)g_list_nth_data(list, i))->h;
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}
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gst_v4l2_set_clips(v4l2element, clips, g_list_length(list));
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g_free(clips);
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}
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break;
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case ARG_DO_OVERLAY:
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if (GST_V4L2_IS_OPEN(v4l2element)) {
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if (!gst_v4l2_enable_overlay(v4l2element, g_value_get_boolean(value)))
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return;
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}
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_v4l2element_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GstV4l2Element *v4l2element;
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gint temp_i = 0;
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gulong temp_ul = 0;
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GList *list = NULL;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail(GST_IS_V4L2ELEMENT(object));
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v4l2element = GST_V4L2ELEMENT(object);
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switch (prop_id) {
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case ARG_CHANNEL:
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if (GST_V4L2_IS_OPEN(v4l2element))
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gst_v4l2_get_input(v4l2element, &temp_i);
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g_value_set_int(value, temp_i);
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break;
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case ARG_CHANNEL_NAMES:
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if (GST_V4L2_IS_OPEN(v4l2element))
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list = gst_v4l2_get_input_names(v4l2element);
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g_value_set_pointer(value, list);
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break;
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case ARG_OUTPUT:
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if (GST_V4L2_IS_OPEN(v4l2element))
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gst_v4l2_get_output(v4l2element, &temp_i);
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g_value_set_int(value, temp_i);
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break;
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case ARG_OUTPUT_NAMES:
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if (GST_V4L2_IS_OPEN(v4l2element))
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list = gst_v4l2_get_output_names(v4l2element);
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g_value_set_pointer(value, list);
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break;
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case ARG_NORM:
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if (GST_V4L2_IS_OPEN(v4l2element))
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gst_v4l2_get_norm(v4l2element, &temp_i);
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g_value_set_int(value, temp_i);
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break;
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case ARG_NORM_NAMES:
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if (GST_V4L2_IS_OPEN(v4l2element))
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list = gst_v4l2_get_norm_names(v4l2element);
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g_value_set_pointer(value, list);
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break;
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case ARG_HAS_TUNER:
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if (GST_V4L2_IS_OPEN(v4l2element))
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temp_i = gst_v4l2_has_tuner(v4l2element);
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g_value_set_boolean(value, temp_i>0?TRUE:FALSE);
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break;
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case ARG_FREQUENCY:
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if (GST_V4L2_IS_OPEN(v4l2element))
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gst_v4l2_get_frequency(v4l2element, &temp_ul);
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g_value_set_ulong(value, temp_ul);
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break;
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case ARG_SIGNAL_STRENGTH:
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if (GST_V4L2_IS_OPEN(v4l2element))
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gst_v4l2_signal_strength(v4l2element, &temp_ul);
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g_value_set_ulong(value, temp_ul);
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break;
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case ARG_HAS_AUDIO:
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if (GST_V4L2_IS_OPEN(v4l2element))
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temp_i = gst_v4l2_has_audio(v4l2element);
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g_value_set_boolean(value, temp_i>0?TRUE:FALSE);
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break;
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case ARG_ATTRIBUTE:
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if (GST_V4L2_IS_OPEN(v4l2element))
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gst_v4l2_get_attribute(v4l2element,
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((GstV4l2Attribute*)g_value_get_pointer(value))->index, &temp_i);
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((GstV4l2Attribute*)g_value_get_pointer(value))->value = temp_i;
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break;
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case ARG_ATTRIBUTE_SETS:
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if (GST_V4L2_IS_OPEN(v4l2element))
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list = gst_v4l2_get_attributes(v4l2element);
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g_value_set_pointer(value, list);
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break;
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case ARG_DEVICE:
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g_value_set_string(value, g_strdup(v4l2element->device));
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break;
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case ARG_DEVICE_NAME:
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if (GST_V4L2_IS_OPEN(v4l2element))
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g_value_set_string(value, g_strdup(v4l2element->vcap.name));
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break;
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case ARG_DEVICE_HAS_CAPTURE:
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if (GST_V4L2_IS_OPEN(v4l2element) &&
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(v4l2element->vcap.type == V4L2_TYPE_CODEC ||
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v4l2element->vcap.type == V4L2_TYPE_CAPTURE) &&
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v4l2element->vcap.flags & V4L2_FLAG_STREAMING)
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temp_i = 1;
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g_value_set_boolean(value, temp_i>0?TRUE:FALSE);
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break;
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case ARG_DEVICE_HAS_OVERLAY:
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if (GST_V4L2_IS_OPEN(v4l2element) &&
|
|
v4l2element->vcap.flags & V4L2_FLAG_PREVIEW)
|
|
temp_i = 1;
|
|
g_value_set_boolean(value, temp_i>0?TRUE:FALSE);
|
|
break;
|
|
case ARG_DEVICE_HAS_CODEC:
|
|
if (GST_V4L2_IS_OPEN(v4l2element) &&
|
|
v4l2element->vcap.type == V4L2_TYPE_CODEC)
|
|
temp_i = 1;
|
|
g_value_set_boolean(value, temp_i>0?TRUE:FALSE);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static GstElementStateReturn
|
|
gst_v4l2element_change_state (GstElement *element)
|
|
{
|
|
GstV4l2Element *v4l2element;
|
|
|
|
g_return_val_if_fail(GST_IS_V4L2ELEMENT(element), GST_STATE_FAILURE);
|
|
|
|
v4l2element = GST_V4L2ELEMENT(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:
|
|
if (!gst_v4l2_open(v4l2element))
|
|
return GST_STATE_FAILURE;
|
|
|
|
/* now, sync options */
|
|
if (v4l2element->norm >= 0)
|
|
if (!gst_v4l2_set_norm(v4l2element, v4l2element->norm))
|
|
return GST_STATE_FAILURE;
|
|
if (v4l2element->channel >= 0)
|
|
if (!gst_v4l2_set_input(v4l2element, v4l2element->channel))
|
|
return GST_STATE_FAILURE;
|
|
if (v4l2element->output >= 0)
|
|
if (!gst_v4l2_set_output(v4l2element, v4l2element->output))
|
|
return GST_STATE_FAILURE;
|
|
if (v4l2element->frequency > 0)
|
|
if (!gst_v4l2_set_frequency(v4l2element, v4l2element->frequency))
|
|
return GST_STATE_FAILURE;
|
|
break;
|
|
case GST_STATE_READY_TO_NULL:
|
|
if (!gst_v4l2_close(v4l2element))
|
|
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 v4l2element */
|
|
factory = gst_element_factory_new("v4l2element", GST_TYPE_V4L2ELEMENT,
|
|
&gst_v4l2element_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,
|
|
"v4l2element",
|
|
plugin_init
|
|
};
|