gstreamer/subprojects/gst-plugins-good/sys/v4l2/gstv4l2mpeg4codec.c

141 lines
4.3 KiB
C

/*
* Copyright (C) 2017 Collabora Inc.
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
* Factored out from gstv4l2mpeg4enc by Philippe Normand <philn@igalia.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.
*
*/
#include "gstv4l2mpeg4codec.h"
#include <gst/gst.h>
#include "ext/v4l2-controls.h"
static gint
v4l2_profile_from_string (const gchar * profile)
{
gint v4l2_profile = -1;
if (g_str_equal (profile, "simple"))
v4l2_profile = V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE;
else if (g_str_equal (profile, "advanced-simple"))
v4l2_profile = V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_SIMPLE;
else if (g_str_equal (profile, "core"))
v4l2_profile = V4L2_MPEG_VIDEO_MPEG4_PROFILE_CORE;
else if (g_str_equal (profile, "simple-scalable"))
v4l2_profile = V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE_SCALABLE;
else if (g_str_equal (profile, "advanced-coding-efficiency"))
v4l2_profile = V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY;
else
GST_WARNING ("Unsupported profile string '%s'", profile);
return v4l2_profile;
}
static const gchar *
v4l2_profile_to_string (gint v4l2_profile)
{
switch (v4l2_profile) {
case V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE:
return "simple";
case V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_SIMPLE:
return "advanced-simple";
case V4L2_MPEG_VIDEO_MPEG4_PROFILE_CORE:
return "core";
case V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE_SCALABLE:
return "simple-scalable";
case V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY:
return "advanced-coding-efficiency";
default:
GST_WARNING ("Unsupported V4L2 profile %i", v4l2_profile);
break;
}
return NULL;
}
static gint
v4l2_level_from_string (const gchar * level)
{
gint v4l2_level = -1;
if (g_str_equal (level, "0"))
v4l2_level = V4L2_MPEG_VIDEO_MPEG4_LEVEL_0;
else if (g_str_equal (level, "0b"))
v4l2_level = V4L2_MPEG_VIDEO_MPEG4_LEVEL_0B;
else if (g_str_equal (level, "1"))
v4l2_level = V4L2_MPEG_VIDEO_MPEG4_LEVEL_1;
else if (g_str_equal (level, "2"))
v4l2_level = V4L2_MPEG_VIDEO_MPEG4_LEVEL_2;
else if (g_str_equal (level, "3"))
v4l2_level = V4L2_MPEG_VIDEO_MPEG4_LEVEL_3;
else if (g_str_equal (level, "3b"))
v4l2_level = V4L2_MPEG_VIDEO_MPEG4_LEVEL_3B;
else if (g_str_equal (level, "4"))
v4l2_level = V4L2_MPEG_VIDEO_MPEG4_LEVEL_4;
else if (g_str_equal (level, "5"))
v4l2_level = V4L2_MPEG_VIDEO_MPEG4_LEVEL_5;
else
GST_WARNING ("Unsupported level '%s'", level);
return v4l2_level;
}
static const gchar *
v4l2_level_to_string (gint v4l2_level)
{
switch (v4l2_level) {
case V4L2_MPEG_VIDEO_MPEG4_LEVEL_0:
return "0";
case V4L2_MPEG_VIDEO_MPEG4_LEVEL_0B:
return "0b";
case V4L2_MPEG_VIDEO_MPEG4_LEVEL_1:
return "1";
case V4L2_MPEG_VIDEO_MPEG4_LEVEL_2:
return "2";
case V4L2_MPEG_VIDEO_MPEG4_LEVEL_3:
return "3";
case V4L2_MPEG_VIDEO_MPEG4_LEVEL_3B:
return "3b";
case V4L2_MPEG_VIDEO_MPEG4_LEVEL_4:
return "4";
case V4L2_MPEG_VIDEO_MPEG4_LEVEL_5:
return "5";
default:
GST_WARNING ("Unsupported V4L2 level %i", v4l2_level);
break;
}
return NULL;
}
const GstV4l2Codec *
gst_v4l2_mpeg4_get_codec (void)
{
static GstV4l2Codec *codec = NULL;
if (g_once_init_enter (&codec)) {
static GstV4l2Codec c;
c.profile_cid = V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE;
c.profile_to_string = v4l2_profile_to_string;
c.profile_from_string = v4l2_profile_from_string;
c.level_cid = V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL;
c.level_to_string = v4l2_level_to_string;
c.level_from_string = v4l2_level_from_string;
g_once_init_leave (&codec, &c);
}
return codec;
}