1 /*
2 * Copyright 2006, 2007, 2008 Fluendo S.A.
3 * Authors: Jan Schmidt <jan@fluendo.com>
4 * Kapil Agrawal <kapil@fluendo.com>
5 * Julien Moutte <julien@fluendo.com>
6 *
7 * This library is licensed under 3 different licenses and you
8 * can choose to use it under the terms of any one of them. The
9 * three licenses are the MPL 1.1, the LGPL and the MIT license.
10 *
11 * MPL:
12 *
13 * The contents of this file are subject to the Mozilla Public License
14 * Version 1.1 (the "License"); you may not use this file except in
15 * compliance with the License. You may obtain a copy of the License at
16 * http://www.mozilla.org/MPL/.
17 *
18 * Software distributed under the License is distributed on an "AS IS"
19 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
20 * License for the specific language governing rights and limitations
21 * under the License.
22 *
23 * LGPL:
24 *
25 * This library is free software; you can redistribute it and/or
26 * modify it under the terms of the GNU Library General Public
27 * License as published by the Free Software Foundation; either
28 * version 2 of the License, or (at your option) any later version.
29 *
30 * This library is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
33 * Library General Public License for more details.
34 *
35 * You should have received a copy of the GNU Library General Public
36 * License along with this library; if not, write to the
37 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
38 * Boston, MA 02110-1301, USA.
39 *
40 * MIT:
41 *
42 * Unless otherwise indicated, Source Code is licensed under MIT license.
43 * See further explanation attached in License Statement (distributed in the file
44 * LICENSE).
45 *
46 * Permission is hereby granted, free of charge, to any person obtaining a copy of
47 * this software and associated documentation files (the "Software"), to deal in
48 * the Software without restriction, including without limitation the rights to
49 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
50 * of the Software, and to permit persons to whom the Software is furnished to do
51 * so, subject to the following conditions:
52 *
53 * The above copyright notice and this permission notice shall be included in all
54 * copies or substantial portions of the Software.
55 *
56 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
57 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
58 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
59 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
60 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
61 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
62 * SOFTWARE.
63 *
64 * SPDX-License-Identifier: MPL-1.1 OR MIT OR LGPL-2.0-or-later
65 */
66
67 #ifdef HAVE_CONFIG_H
68 #include "config.h"
69 #endif
70
71 #include "gstbasetsmuxopus.h"
72 #include <string.h>
73 #include <gst/audio/audio.h>
74
75 #define GST_CAT_DEFAULT gst_base_ts_mux_debug
76
77 GstBuffer *
gst_base_ts_mux_prepare_opus(GstBuffer * buf,GstBaseTsMuxPad * pad,GstBaseTsMux * mux)78 gst_base_ts_mux_prepare_opus (GstBuffer * buf, GstBaseTsMuxPad * pad,
79 GstBaseTsMux * mux)
80 {
81 gssize insize = gst_buffer_get_size (buf);
82 gsize outsize;
83 GstBuffer *outbuf;
84 GstMapInfo map;
85 guint n;
86 GstAudioClippingMeta *cmeta = gst_buffer_get_audio_clipping_meta (buf);
87
88 g_assert (!cmeta || cmeta->format == GST_FORMAT_DEFAULT);
89
90 outsize = 2 + insize / 255 + 1;
91 if (cmeta && cmeta->start)
92 outsize += 2;
93 if (cmeta && cmeta->end)
94 outsize += 2;
95
96 outbuf = gst_buffer_new_and_alloc (outsize);
97 gst_buffer_copy_into (outbuf, buf,
98 GST_BUFFER_COPY_METADATA | GST_BUFFER_COPY_TIMESTAMPS, 0, 0);
99 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
100 map.data[0] = 0x7f;
101 map.data[1] = 0xe0;
102
103 if (cmeta && cmeta->start)
104 map.data[1] |= 0x10;
105 if (cmeta && cmeta->end)
106 map.data[1] |= 0x08;
107
108 n = 2;
109 do {
110 g_assert (n < outsize);
111 /* FIXME: this should be using insize for writing here but ffmpeg and the
112 * only available sample stream from obe.tv are not including the control
113 * header size in au_size
114 */
115 map.data[n] = MIN (insize, 255);
116 insize -= 255;
117 n++;
118 } while (insize >= 0);
119
120 if (cmeta && cmeta->start) {
121 GST_WRITE_UINT16_BE (&map.data[n], cmeta->start);
122 n += 2;
123 }
124
125 if (cmeta && cmeta->end)
126 GST_WRITE_UINT16_BE (&map.data[n], cmeta->end);
127
128 gst_buffer_unmap (outbuf, &map);
129
130 outbuf = gst_buffer_append (outbuf, gst_buffer_ref (buf));
131
132 return outbuf;
133 }
134