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127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/*
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* Copyright (C) 2019 Igalia S.L.
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* Author: Philippe Normand <philn@igalia.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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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 <fcntl.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "gstv4l2codec.h"
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#include "ext/videodev2.h"
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#include <gst/gst.h>
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gboolean
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gst_v4l2_codec_probe_profiles (const GstV4l2Codec * codec, gint video_fd,
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GValue * profiles)
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{
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struct v4l2_queryctrl query_ctrl;
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gboolean ret = FALSE;
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memset (&query_ctrl, 0, sizeof (query_ctrl));
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query_ctrl.id = codec->profile_cid;
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if (ioctl (video_fd, VIDIOC_QUERYCTRL, &query_ctrl) == 0) {
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if (query_ctrl.flags & V4L2_CTRL_FLAG_DISABLED)
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return FALSE;
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if (query_ctrl.type == V4L2_CTRL_TYPE_MENU) {
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struct v4l2_querymenu query_menu;
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memset (&query_menu, 0, sizeof (query_menu));
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query_menu.id = query_ctrl.id;
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g_value_init (profiles, GST_TYPE_LIST);
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for (query_menu.index = query_ctrl.minimum;
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query_menu.index <= query_ctrl.maximum; query_menu.index++) {
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if (ioctl (video_fd, VIDIOC_QUERYMENU, &query_menu) >= 0) {
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GValue value = G_VALUE_INIT;
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g_value_init (&value, G_TYPE_STRING);
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g_value_set_string (&value,
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codec->profile_to_string (query_menu.index));
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gst_value_list_append_and_take_value (profiles, &value);
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ret = TRUE;
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}
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}
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if (gst_value_list_get_size (profiles) == 0) {
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g_value_unset (profiles);
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ret = FALSE;
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}
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}
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}
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return ret;
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}
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gboolean
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gst_v4l2_codec_probe_levels (const GstV4l2Codec * codec, gint video_fd,
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GValue * levels)
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{
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struct v4l2_queryctrl query_ctrl;
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gboolean ret = FALSE;
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memset (&query_ctrl, 0, sizeof (query_ctrl));
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query_ctrl.id = codec->level_cid;
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if (ioctl (video_fd, VIDIOC_QUERYCTRL, &query_ctrl) == 0) {
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if (query_ctrl.flags & V4L2_CTRL_FLAG_DISABLED)
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return FALSE;
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if (query_ctrl.type == V4L2_CTRL_TYPE_MENU) {
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struct v4l2_querymenu query_menu;
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memset (&query_menu, 0, sizeof (query_menu));
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query_menu.id = query_ctrl.id;
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query_menu.index = query_ctrl.maximum;
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if (ioctl (video_fd, VIDIOC_QUERYMENU, &query_menu) >= 0) {
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gint32 i;
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g_value_init (levels, GST_TYPE_LIST);
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/* Assume that all levels below the highest one reported by the driver are supported. */
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for (i = query_ctrl.minimum; i <= query_ctrl.maximum; i++) {
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GValue value = G_VALUE_INIT;
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g_value_init (&value, G_TYPE_STRING);
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g_value_set_string (&value, codec->level_to_string (i));
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gst_value_list_append_and_take_value (levels, &value);
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ret = TRUE;
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}
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if (gst_value_list_get_size (levels) == 0) {
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g_value_unset (levels);
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ret = FALSE;
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}
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}
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}
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}
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return ret;
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}
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