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/* GStreamer
* Copyright (C) 2020 Collabora Ltd.
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* plugin-v4l2codecs:
* @title: V4L2 Stateless codec
* @short_description: V4L2 plugin to support Statless codec drivers
*
* This plugin provides support for Video4Linux2 drivers implementing stateless
* video codecs. The plugin will generate elements based on the system
* capabilities. For this reason, this documentation may differ from output
* of running `gst-inspect-1.0` on your target.
*
* If you are having issues getting any elementis to be registered, you may want
* to verify that your user have adequate permissions to access media and video
* devices. These Linux devices are usually found in `/dev/media*` and
* `/dev/video*`.
*
* This documentation as been generated with the use of the environment variable
* `GST_V4L2_CODEC_GEN_DOC=1`. Using tis environment outside of the documentation
* generation will render your codecs unusable.
*
* Since: 1.18
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstv4l2codecav1dec.h"
#include "gstv4l2codecdevice.h"
#include "gstv4l2codech264dec.h"
#include "gstv4l2codech265dec.h"
#include "gstv4l2codecmpeg2dec.h"
#include "gstv4l2codecvp8dec.h"
#include "gstv4l2codecvp9dec.h"
#include "gstv4l2decoder.h"
#include "linux/v4l2-controls.h"
#include "linux/media.h"
#define GST_CAT_DEFAULT gstv4l2codecs_debug
GST_DEBUG_CATEGORY (gstv4l2codecs_debug);
static void
register_video_decoder (GstPlugin * plugin, GstV4l2CodecDevice * device)
{
GstV4l2Decoder *decoder = gst_v4l2_decoder_new (device);
gint i;
guint32 fmt;
if (!gst_v4l2_decoder_open (decoder)) {
g_object_unref (decoder);
return;
}
for (i = 0; gst_v4l2_decoder_enum_sink_fmt (decoder, i, &fmt); i++) {
switch (fmt) {
case V4L2_PIX_FMT_H264_SLICE:
GST_INFO_OBJECT (decoder, "Registering %s as H264 Decoder",
device->name);
gst_v4l2_codec_h264_dec_register (plugin, decoder, device,
GST_RANK_PRIMARY + 1);
break;
case V4L2_PIX_FMT_HEVC_SLICE:
GST_INFO_OBJECT (decoder, "Registering %s as H265 Decoder",
device->name);
gst_v4l2_codec_h265_dec_register (plugin, decoder, device,
GST_RANK_PRIMARY + 1);
break;
case V4L2_PIX_FMT_VP8_FRAME:
GST_INFO_OBJECT (decoder, "Registering %s as VP8 Decoder",
device->name);
gst_v4l2_codec_vp8_dec_register (plugin, decoder, device,
GST_RANK_PRIMARY + 1);
break;
case V4L2_PIX_FMT_MPEG2_SLICE:
GST_INFO_OBJECT (decoder, "Registering %s as Mpeg2 Decoder",
device->name);
gst_v4l2_codec_mpeg2_dec_register (plugin, decoder, device,
GST_RANK_PRIMARY + 1);
break;
case V4L2_PIX_FMT_VP9_FRAME:
GST_INFO_OBJECT (decoder, "Registering %s as VP9 Decoder",
device->name);
gst_v4l2_codec_vp9_dec_register (plugin, decoder, device,
GST_RANK_PRIMARY + 1);
break;
case V4L2_PIX_FMT_AV1_FRAME:
GST_INFO_OBJECT (decoder, "Registering %s as AV1 Decoder",
device->name);
gst_v4l2_codec_av1_dec_register (plugin, decoder, device,
GST_RANK_PRIMARY + 1);
break;
default:
GST_FIXME_OBJECT (decoder, "%" GST_FOURCC_FORMAT " is not supported.",
GST_FOURCC_ARGS (fmt));
break;
}
}
g_object_unref (decoder);
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GList *devices, *d;
const gchar *paths[] = { "/dev", NULL };
const gchar *names[] = { "media", NULL };
GST_DEBUG_CATEGORY_INIT (gstv4l2codecs_debug, "v4l2codecs", 0,
"V4L2 CODECs general debug");
/* Add some dependency, so the dynamic features get updated upon changes in
* /dev/media* */
gst_plugin_add_dependency (plugin,
NULL, paths, names, GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_PREFIX);
devices = gst_v4l2_codec_find_devices ();
for (d = devices; d; d = g_list_next (d)) {
GstV4l2CodecDevice *device = d->data;
if (device->function == MEDIA_ENT_F_PROC_VIDEO_DECODER)
register_video_decoder (plugin, device);
}
gst_v4l2_codec_device_list_free (devices);
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
v4l2codecs,
"V4L2 CODEC Accelerators plugin",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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