1 /* 2 * GStreamer gstreamer-aesdec 3 * 4 * Copyright, LCC (C) 2015 RidgeRun, LCC <carsten.behling@ridgerun.com> 5 * Copyright, 2020 Nice, Contact: Rabindra Harlalka <Rabindra.Harlalka@nice.com> 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23 * DEALINGS IN THE SOFTWARE. 24 * 25 * Alternatively, the contents of this file may be used under the 26 * GNU Lesser General Public License Version 2.1 (the "LGPL"), in 27 * which case the following provisions apply instead of the ones 28 * mentioned above: 29 * 30 * This library is free software; you can redistribute it and/or 31 * modify it under the terms of the GNU Library General Public 32 * License as published by the Free Software Foundation; either 33 * version 2 of the License, or (at your option) any later version. 34 * 35 * This library is distributed in the hope that it will be useful, 36 * but WITHOUT ANY WARRANTY; without even the implied warranty of 37 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 38 * Library General Public License for more details. 39 * 40 * You should have received a copy of the GNU Library General Public 41 * License along with this library; if not, write to the 42 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 43 * Boston, MA 02110-1335, USA. 44 */ 45 46 #ifndef __GST_AES_DEC_H__ 47 #define __GST_AES_DEC_H__ 48 49 #include "gstaeshelper.h" 50 #include <gst/base/gstbasetransform.h> 51 52 G_BEGIN_DECLS 53 54 #define GST_TYPE_AES_DEC (gst_aes_dec_get_type()) 55 G_DECLARE_FINAL_TYPE (GstAesDec, gst_aes_dec, GST, AES_DEC, GstBaseTransform) 56 #define GST_AES_DEC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AES_DEC,GstAesDec)) 57 #define GST_AES_DEC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_AES_DEC,GstAesDecClass)) 58 #define GST_AES_DEC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), GST_TYPE_AES_DEC,GstAesDecClass)) 59 #define GST_IS_AES_DEC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AES_DEC)) 60 #define GST_IS_AES_DEC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_AES_DEC)) 61 62 struct _GstAesDec 63 { 64 GstBaseTransform element; 65 66 /* Properties */ 67 GstAesCipher cipher; 68 guchar key[EVP_MAX_KEY_LENGTH]; 69 guchar iv[GST_AES_BLOCK_SIZE]; 70 gboolean serialize_iv; 71 gboolean per_buffer_padding; 72 73 /* Element variables */ 74 const EVP_CIPHER *evp_cipher; 75 EVP_CIPHER_CTX *evp_ctx; 76 gboolean awaiting_first_buffer; 77 GMutex decoder_lock; 78 /* if TRUE, then properties cannot be changed */ 79 gboolean locked_properties; 80 }; 81 82 struct _GstAesDecClass 83 { 84 GstBaseTransformClass parent_class; 85 }; 86 87 GST_ELEMENT_REGISTER_DECLARE (aesdec) 88 89 G_END_DECLS 90 #endif /* __GST_AES_DEC_H__ */ 91