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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Original commit message from CVS: Some changes proposed by wingo in bug #338818 (but not everything yet). Patch from Martin Rubli to fix framerate detection.
572 lines
15 KiB
C
572 lines
15 KiB
C
/*
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* GStreamer gstv4l2element.c: base class for V4L2 elements
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* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* Copyright (C) 2006 Edgard Lima <edgard.lima@indt.org.br>
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version. This library is distributed in the hope
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* that it will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Library General Public License for more details.
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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 Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* 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 <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <gst/interfaces/propertyprobe.h>
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#include "v4l2_calls.h"
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#include "gstv4l2tuner.h"
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#ifdef HAVE_XVIDEO
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#include "gstv4l2xoverlay.h"
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#endif
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#include "gstv4l2colorbalance.h"
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enum
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{
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PROP_0,
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PROP_DEVICE,
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PROP_DEVICE_NAME,
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PROP_FLAGS,
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PROP_STD,
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PROP_INPUT,
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PROP_FREQUENCY
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};
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static void gst_v4l2element_init_interfaces (GType type);
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GST_BOILERPLATE_FULL (GstV4l2Element, gst_v4l2element, GstPushSrc,
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GST_TYPE_PUSH_SRC, gst_v4l2element_init_interfaces);
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static void gst_v4l2element_dispose (GObject * object);
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static void gst_v4l2element_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_v4l2element_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static gboolean gst_v4l2element_start (GstBaseSrc * src);
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static gboolean gst_v4l2element_stop (GstBaseSrc * src);
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static gboolean
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gst_v4l2_iface_supported (GstImplementsInterface * iface, GType iface_type)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (iface);
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#ifdef HAVE_XVIDEO
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g_assert (iface_type == GST_TYPE_TUNER ||
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iface_type == GST_TYPE_X_OVERLAY || iface_type == GST_TYPE_COLOR_BALANCE);
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#else
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g_assert (iface_type == GST_TYPE_TUNER ||
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iface_type == GST_TYPE_COLOR_BALANCE);
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#endif
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if (v4l2element->video_fd == -1)
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return FALSE;
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#ifdef HAVE_XVIDEO
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if (iface_type == GST_TYPE_X_OVERLAY && !GST_V4L2_IS_OVERLAY (v4l2element))
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return FALSE;
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#endif
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return TRUE;
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}
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static void
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gst_v4l2_interface_init (GstImplementsInterfaceClass * klass)
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{
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/*
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* default virtual functions
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*/
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klass->supported = gst_v4l2_iface_supported;
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}
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static const GList *
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gst_v4l2_probe_get_properties (GstPropertyProbe * probe)
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{
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GObjectClass *klass = G_OBJECT_GET_CLASS (probe);
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static GList *list = NULL;
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/* well, not perfect, but better than no locking at all.
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* In the worst case we leak a list node, so who cares? */
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GST_CLASS_LOCK (GST_OBJECT_CLASS (klass));
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if (!list) {
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list = g_list_append (NULL, g_object_class_find_property (klass, "device"));
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}
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GST_CLASS_UNLOCK (GST_OBJECT_CLASS (klass));
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return list;
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}
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static gboolean
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gst_v4l2_class_probe_devices (GstV4l2ElementClass * klass, gboolean check)
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{
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static gboolean init = FALSE;
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static GList *devices = NULL;
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if (!init && !check) {
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gchar *dev_base[] = { "/dev/video", "/dev/v4l2/video", NULL };
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gint base, n, fd;
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while (devices) {
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GList *item = devices;
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gchar *device = item->data;
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devices = g_list_remove (devices, item);
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g_free (device);
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}
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/*
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* detect /dev entries
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*/
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for (n = 0; n < 64; n++) {
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for (base = 0; dev_base[base] != NULL; base++) {
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struct stat s;
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gchar *device = g_strdup_printf ("%s%d",
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dev_base[base],
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n);
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/*
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* does the /dev/ entry exist at all?
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*/
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if (stat (device, &s) == 0) {
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/*
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* yes: is a device attached?
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*/
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if (S_ISCHR (s.st_mode)) {
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if ((fd = open (device, O_RDWR | O_NONBLOCK)) > 0 || errno == EBUSY) {
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if (fd > 0)
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close (fd);
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devices = g_list_append (devices, device);
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break;
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}
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}
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}
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g_free (device);
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}
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}
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init = TRUE;
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}
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klass->devices = devices;
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return init;
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}
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static void
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gst_v4l2_probe_probe_property (GstPropertyProbe * probe,
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guint prop_id, const GParamSpec * pspec)
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{
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GstV4l2ElementClass *klass = GST_V4L2ELEMENT_GET_CLASS (probe);
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switch (prop_id) {
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case PROP_DEVICE:
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gst_v4l2_class_probe_devices (klass, FALSE);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
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break;
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}
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}
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static gboolean
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gst_v4l2_probe_needs_probe (GstPropertyProbe * probe,
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guint prop_id, const GParamSpec * pspec)
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{
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GstV4l2ElementClass *klass = GST_V4L2ELEMENT_GET_CLASS (probe);
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gboolean ret = FALSE;
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switch (prop_id) {
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case PROP_DEVICE:
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ret = !gst_v4l2_class_probe_devices (klass, TRUE);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
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break;
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}
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return ret;
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}
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static GValueArray *
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gst_v4l2_class_list_devices (GstV4l2ElementClass * klass)
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{
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GValueArray *array;
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GValue value = { 0 };
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GList *item;
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if (!klass->devices)
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return NULL;
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array = g_value_array_new (g_list_length (klass->devices));
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item = klass->devices;
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g_value_init (&value, G_TYPE_STRING);
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while (item) {
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gchar *device = item->data;
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g_value_set_string (&value, device);
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g_value_array_append (array, &value);
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item = item->next;
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}
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g_value_unset (&value);
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return array;
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}
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static GValueArray *
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gst_v4l2_probe_get_values (GstPropertyProbe * probe,
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guint prop_id, const GParamSpec * pspec)
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{
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GstV4l2ElementClass *klass = GST_V4L2ELEMENT_GET_CLASS (probe);
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GValueArray *array = NULL;
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switch (prop_id) {
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case PROP_DEVICE:
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array = gst_v4l2_class_list_devices (klass);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
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break;
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}
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return array;
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}
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static void
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gst_v4l2_property_probe_interface_init (GstPropertyProbeInterface * iface)
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{
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iface->get_properties = gst_v4l2_probe_get_properties;
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iface->probe_property = gst_v4l2_probe_probe_property;
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iface->needs_probe = gst_v4l2_probe_needs_probe;
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iface->get_values = gst_v4l2_probe_get_values;
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}
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#define GST_TYPE_V4L2_DEVICE_FLAGS (gst_v4l2_device_get_type ())
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GType
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gst_v4l2_device_get_type (void)
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{
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static GType v4l2_device_type = 0;
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if (v4l2_device_type == 0) {
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static const GFlagsValue values[] = {
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{V4L2_CAP_VIDEO_CAPTURE, "CAPTURE",
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"Device supports video capture"},
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{V4L2_CAP_VIDEO_OUTPUT, "PLAYBACK",
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"Device supports video playback"},
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{V4L2_CAP_VIDEO_OVERLAY, "OVERLAY",
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"Device supports video overlay"},
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{V4L2_CAP_VBI_CAPTURE, "VBI_CAPTURE",
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"Device supports the VBI capture"},
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{V4L2_CAP_VBI_OUTPUT, "VBI_OUTPUT",
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"Device supports the VBI output"},
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{V4L2_CAP_TUNER, "TUNER",
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"Device has a tuner or modulator"},
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{V4L2_CAP_AUDIO, "AUDIO",
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"Device has audio inputs or outputs"},
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{0, NULL, NULL}
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};
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v4l2_device_type =
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g_flags_register_static ("GstV4l2DeviceTypeFlags", values);
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}
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return v4l2_device_type;
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}
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static void
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gst_v4l2element_init_interfaces (GType type)
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{
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static const GInterfaceInfo v4l2iface_info = {
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(GInterfaceInitFunc) gst_v4l2_interface_init,
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NULL,
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NULL,
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};
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static const GInterfaceInfo v4l2_tuner_info = {
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(GInterfaceInitFunc) gst_v4l2_tuner_interface_init,
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NULL,
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NULL,
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};
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#ifdef HAVE_XVIDEO
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static const GInterfaceInfo v4l2_xoverlay_info = {
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(GInterfaceInitFunc) gst_v4l2_xoverlay_interface_init,
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NULL,
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NULL,
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};
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#endif
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static const GInterfaceInfo v4l2_colorbalance_info = {
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(GInterfaceInitFunc) gst_v4l2_color_balance_interface_init,
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NULL,
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NULL,
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};
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static const GInterfaceInfo v4l2_propertyprobe_info = {
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(GInterfaceInitFunc) gst_v4l2_property_probe_interface_init,
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NULL,
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NULL,
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};
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g_type_add_interface_static (type,
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GST_TYPE_IMPLEMENTS_INTERFACE, &v4l2iface_info);
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g_type_add_interface_static (type, GST_TYPE_TUNER, &v4l2_tuner_info);
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#ifdef HAVE_XVIDEO
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g_type_add_interface_static (type, GST_TYPE_X_OVERLAY, &v4l2_xoverlay_info);
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#endif
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g_type_add_interface_static (type,
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GST_TYPE_COLOR_BALANCE, &v4l2_colorbalance_info);
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g_type_add_interface_static (type, GST_TYPE_PROPERTY_PROBE,
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&v4l2_propertyprobe_info);
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}
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static void
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gst_v4l2element_base_init (gpointer g_class)
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{
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GstV4l2ElementClass *klass = GST_V4L2ELEMENT_CLASS (g_class);
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klass->devices = NULL;
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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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GstBaseSrcClass *basesrc_class;
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gobject_class = (GObjectClass *) klass;
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basesrc_class = (GstBaseSrcClass *) klass;
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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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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DEVICE,
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g_param_spec_string ("device",
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"Device", "Device location", NULL, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass),
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PROP_DEVICE_NAME,
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g_param_spec_string ("device_name",
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"Device name", "Name of the device", NULL, G_PARAM_READABLE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FLAGS,
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g_param_spec_flags ("flags", "Flags",
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"Device type flags",
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GST_TYPE_V4L2_DEVICE_FLAGS, 0, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, PROP_STD,
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g_param_spec_string ("std", "std",
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"standard (norm) to use", NULL, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_INPUT,
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g_param_spec_string ("input",
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"input",
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"input/output (channel) to switch to", NULL, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_FREQUENCY,
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g_param_spec_ulong ("frequency",
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"frequency",
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"frequency to tune to (in Hz)", 0, G_MAXULONG, 0, G_PARAM_READWRITE));
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basesrc_class->start = gst_v4l2element_start;
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basesrc_class->stop = gst_v4l2element_stop;
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gobject_class->dispose = gst_v4l2element_dispose;
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}
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static void
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gst_v4l2element_init (GstV4l2Element * v4l2element, GstV4l2ElementClass * klass)
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{
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/*
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* some default values
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*/
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v4l2element->video_fd = -1;
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v4l2element->buffer = NULL;
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v4l2element->videodev = g_strdup ("/dev/video0");
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v4l2element->stds = NULL;
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v4l2element->inputs = NULL;
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v4l2element->colors = NULL;
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v4l2element->xwindow_id = 0;
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}
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static void
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gst_v4l2element_dispose (GObject * object)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (object);
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if (v4l2element->videodev) {
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g_free (v4l2element->videodev);
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v4l2element->videodev = NULL;
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}
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if (((GObjectClass *) parent_class)->dispose)
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((GObjectClass *) parent_class)->dispose (object);
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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, const GValue * value, GParamSpec * pspec)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (object);
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switch (prop_id) {
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case PROP_DEVICE:
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if (v4l2element->videodev)
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g_free (v4l2element->videodev);
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v4l2element->videodev = g_strdup (g_value_get_string (value));
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break;
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case PROP_STD:
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if (GST_V4L2_IS_OPEN (v4l2element)) {
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GstTuner *tuner = GST_TUNER (v4l2element);
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GstTunerNorm *norm = gst_tuner_find_norm_by_name (tuner,
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(gchar *)
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g_value_get_string (value));
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if (norm) {
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/* more generic would be gst_tuner_set_norm (tuner, norm)
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without g_object_notify */
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gst_v4l2_tuner_set_norm (tuner, norm);
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}
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} else {
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g_free (v4l2element->std);
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v4l2element->std = g_value_dup_string (value);
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}
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break;
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case PROP_INPUT:
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if (GST_V4L2_IS_OPEN (v4l2element)) {
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GstTuner *tuner = GST_TUNER (v4l2element);
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GstTunerChannel *channel = gst_tuner_find_channel_by_name (tuner,
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(gchar *)
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g_value_get_string (value));
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if (channel) {
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/* more generic would be gst_tuner_set_channel (tuner, channel)
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without g_object_notify */
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gst_v4l2_tuner_set_channel (tuner, channel);
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}
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} else {
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g_free (v4l2element->input);
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v4l2element->input = g_value_dup_string (value);
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}
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break;
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case PROP_FREQUENCY:
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if (GST_V4L2_IS_OPEN (v4l2element)) {
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GstTuner *tuner = GST_TUNER (v4l2element);
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GstTunerChannel *channel = gst_tuner_get_channel (tuner);
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if (channel &&
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GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
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/* more generic would be
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gst_tuner_set_frequency (tuner, channel, g_value_get_ulong (value))
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without g_object_notify */
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gst_v4l2_tuner_set_frequency (tuner, channel,
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g_value_get_ulong (value));
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}
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} else {
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v4l2element->frequency = g_value_get_ulong (value);
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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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|
}
|
|
}
|
|
|
|
|
|
static void
|
|
gst_v4l2element_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstV4l2Element *v4l2element = GST_V4L2ELEMENT (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_DEVICE:
|
|
g_value_set_string (value, v4l2element->videodev);
|
|
break;
|
|
case PROP_DEVICE_NAME:
|
|
{
|
|
gchar *new = NULL;
|
|
|
|
if (GST_V4L2_IS_OPEN (v4l2element))
|
|
new = (gchar *) v4l2element->vcap.card;
|
|
g_value_set_string (value, new);
|
|
break;
|
|
}
|
|
case PROP_FLAGS:
|
|
{
|
|
guint flags = 0;
|
|
|
|
if (GST_V4L2_IS_OPEN (v4l2element)) {
|
|
flags |= v4l2element->vcap.capabilities &
|
|
(V4L2_CAP_VIDEO_CAPTURE |
|
|
V4L2_CAP_VIDEO_OUTPUT |
|
|
V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_TUNER | V4L2_CAP_AUDIO);
|
|
if (v4l2element->vcap.capabilities & V4L2_CAP_AUDIO)
|
|
flags |= V4L2_FBUF_CAP_CHROMAKEY;
|
|
}
|
|
g_value_set_flags (value, flags);
|
|
break;
|
|
}
|
|
case PROP_STD:
|
|
g_value_set_string (value, v4l2element->std);
|
|
break;
|
|
case PROP_INPUT:
|
|
g_value_set_string (value, v4l2element->input);
|
|
break;
|
|
case PROP_FREQUENCY:
|
|
g_value_set_ulong (value, v4l2element->frequency);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2element_start (GstBaseSrc * src)
|
|
{
|
|
GstV4l2Element *v4l2element = GST_V4L2ELEMENT (src);
|
|
|
|
if (!gst_v4l2_open (v4l2element))
|
|
return FALSE;
|
|
|
|
#ifdef HAVE_XVIDEO
|
|
gst_v4l2_xoverlay_start (v4l2element);
|
|
#endif
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2element_stop (GstBaseSrc * src)
|
|
{
|
|
GstV4l2Element *v4l2element = GST_V4L2ELEMENT (src);
|
|
|
|
#ifdef HAVE_XVIDEO
|
|
gst_v4l2_xoverlay_stop (v4l2element);
|
|
#endif
|
|
|
|
if (!gst_v4l2_close (v4l2element))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|