From 3ec5a0a054fd36290f006aa2101da35d03d9f5ed Mon Sep 17 00:00:00 2001 From: "Ronald S. Bultje" Date: Mon, 9 Sep 2002 07:14:35 +0000 Subject: this adds video4linux2 source and element plugins. The division in v4l2* plugins is the same as for v4l1 - i.e. an el... 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. --- sys/v4l2/v4l2_calls.h | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 135 insertions(+) create mode 100644 sys/v4l2/v4l2_calls.h (limited to 'sys/v4l2/v4l2_calls.h') diff --git a/sys/v4l2/v4l2_calls.h b/sys/v4l2/v4l2_calls.h new file mode 100644 index 00000000..ce562d47 --- /dev/null +++ b/sys/v4l2/v4l2_calls.h @@ -0,0 +1,135 @@ +/* G-Streamer generic V4L2 element - generic V4L2 calls handling + * Copyright (C) 2002 Ronald Bultje + * + * 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. + */ + +#ifndef __V4L2_CALLS_H__ +#define __V4L2_CALLS_H__ + +#include "gstv4l2element.h" + + +/* simple check whether the device is open */ +#define GST_V4L2_IS_OPEN(v4l2element) \ + (v4l2element->video_fd > 0) + +/* check whether the device is 'active' */ +#define GST_V4L2_IS_ACTIVE(v4l2element) \ + (v4l2element->buffer != NULL) + +#define GST_V4L2_IS_OVERLAY(v4l2element) \ + (v4l2element->vcap.flags & V4L2_FLAG_PREVIEW) + +/* checks whether the current v4lelement has already been open()'ed or not */ +#define GST_V4L2_CHECK_OPEN(v4l2element) \ + if (v4l2element->video_fd <= 0) \ + { \ + gst_element_error(GST_ELEMENT(v4l2element), \ + "Device is not open"); \ + return FALSE; \ + } + +/* checks whether the current v4lelement is close()'ed or whether it is still open */ +#define GST_V4L2_CHECK_NOT_OPEN(v4l2element) \ + if (v4l2element->video_fd != -1) \ + { \ + gst_element_error(GST_ELEMENT(v4l2element), \ + "Device is open"); \ + return FALSE; \ + } + +/* checks whether the current v4lelement does video overlay */ +#define GST_V4L2_CHECK_OVERLAY(v4l2element) \ + if (!(v4l2element->vcap.flags & V4L2_FLAG_PREVIEW)) \ + { \ + gst_element_error(GST_ELEMENT(v4l2element), \ + "Device doesn't do overlay"); \ + return FALSE; \ + } + +/* checks whether we're in capture mode or not */ +#define GST_V4L2_CHECK_ACTIVE(v4l2element) \ + if (v4l2element->buffer == NULL) \ + { \ + gst_element_error(GST_ELEMENT(v4l2element), \ + "Device is not in streaming mode"); \ + return FALSE; \ + } + +/* checks whether we're out of capture mode or not */ +#define GST_V4L2_CHECK_NOT_ACTIVE(v4l2element) \ + if (v4l2element->buffer != NULL) \ + { \ + gst_element_error(GST_ELEMENT(v4l2element), \ + "Device is in streaming mode"); \ + return FALSE; \ + } + + +/* open/close the device */ +gboolean gst_v4l2_open (GstV4l2Element *v4l2element); +gboolean gst_v4l2_close (GstV4l2Element *v4l2element); + +/* norm/input/output */ +gboolean gst_v4l2_get_norm (GstV4l2Element *v4l2element, + gint *norm); +gboolean gst_v4l2_set_norm (GstV4l2Element *v4l2element, + gint norm); +GList * gst_v4l2_get_norm_names (GstV4l2Element *v4l2element); +gboolean gst_v4l2_get_input (GstV4l2Element *v4l2element, + gint *input); +gboolean gst_v4l2_set_input (GstV4l2Element *v4l2element, + gint input); +GList * gst_v4l2_get_input_names (GstV4l2Element *v4l2element); +gboolean gst_v4l2_get_output (GstV4l2Element *v4l2element, + gint *output); +gboolean gst_v4l2_set_output (GstV4l2Element *v4l2element, + gint output); +GList * gst_v4l2_get_output_names (GstV4l2Element *v4l2element); + +/* frequency control */ +gboolean gst_v4l2_has_tuner (GstV4l2Element *v4l2element); +gboolean gst_v4l2_get_frequency (GstV4l2Element *v4l2element, + gulong *frequency); +gboolean gst_v4l2_set_frequency (GstV4l2Element *v4l2element, + gulong frequency); +gboolean gst_v4l2_signal_strength (GstV4l2Element *v4l2element, + gulong *signal_strength); + +/* attribute control */ +gboolean gst_v4l2_has_audio (GstV4l2Element *v4l2element); +GList * gst_v4l2_get_attributes (GstV4l2Element *v4l2element); +gboolean gst_v4l2_get_attribute (GstV4l2Element *v4l2element, + gint attribute_num, + gint *value); +gboolean gst_v4l2_set_attribute (GstV4l2Element *v4l2element, + gint attribute_num, + gint value); + +/* overlay */ +gboolean gst_v4l2_set_display (GstV4l2Element *v4l2element, + const gchar *display); +gboolean gst_v4l2_set_window (GstV4l2Element *v4l2element, + gint x, gint y, + gint w, gint h); +gboolean gst_v4l2_set_clips (GstV4l2Element *v4l2element, + struct v4l2_clip *clips, + gint num_clips); +gboolean gst_v4l2_enable_overlay (GstV4l2Element *v4l2element, + gboolean enable); + +#endif /* __V4L2_CALLS_H__ */ -- cgit v1.2.1