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78 lines
2 KiB
C
78 lines
2 KiB
C
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/* GStreamer
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* Copyright (C) 2020 Nicolas Dufresne <nicolas.dufresne@collabora.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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#include "gstv4l2format.h"
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#define GST_CAT_DEFAULT gstv4l2codecs_debug
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GST_DEBUG_CATEGORY_EXTERN (gstv4l2codecs_debug);
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struct FormatEntry
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{
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guint32 v4l2_pix_fmt;
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gint num_planes;
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GstVideoFormat gst_fmt;
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guint bitdepth;
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gint subsampling;
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};
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static struct FormatEntry format_map[] = {
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{V4L2_PIX_FMT_NV12, 1, GST_VIDEO_FORMAT_NV12, 8, 420},
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{0,}
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};
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static struct FormatEntry *
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lookup_v4l2_fmt (guint v4l2_pix_fmt)
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{
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gint i;
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struct FormatEntry *ret = NULL;
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for (i = 0; format_map[i].v4l2_pix_fmt; i++) {
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if (format_map[i].v4l2_pix_fmt == v4l2_pix_fmt) {
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ret = format_map + i;
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break;
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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_format_to_video_info (struct v4l2_format * fmt,
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GstVideoInfo * out_info)
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{
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struct FormatEntry *entry = lookup_v4l2_fmt (fmt->fmt.pix_mp.pixelformat);
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if (!entry)
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return FALSE;
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if (entry->num_planes != 1) {
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GST_FIXME ("Multi allocation formats are not supported yet");
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return FALSE;
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}
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if (!gst_video_info_set_format (out_info, entry->gst_fmt,
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fmt->fmt.pix_mp.width, fmt->fmt.pix_mp.height))
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return FALSE;
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/* FIXME play the extrapolation danse for single FDs formats, and copy over
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* stride/offsets/size for the other formats */
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return TRUE;
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}
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