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 4 different licenses and you
8 * can choose to use it under the terms of any one of them. The
9 * four licenses are the MPL 1.1, the LGPL, the GPL and the MIT
10 * license.
11 *
12 * MPL:
13 *
14 * The contents of this file are subject to the Mozilla Public License
15 * Version 1.1 (the "License"); you may not use this file except in
16 * compliance with the License. You may obtain a copy of the License at
17 * http://www.mozilla.org/MPL/.
18 *
19 * Software distributed under the License is distributed on an "AS IS"
20 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
21 * License for the specific language governing rights and limitations
22 * under the License.
23 *
24 * LGPL:
25 *
26 * This library is free software; you can redistribute it and/or
27 * modify it under the terms of the GNU Library General Public
28 * License as published by the Free Software Foundation; either
29 * version 2 of the License, or (at your option) any later version.
30 *
31 * This library is distributed in the hope that it will be useful,
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
34 * Library General Public License for more details.
35 *
36 * You should have received a copy of the GNU Library General Public
37 * License along with this library; if not, write to the
38 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
39 * Boston, MA 02110-1301, USA.
40 *
41 * GPL:
42 *
43 * This program is free software; you can redistribute it and/or modify
44 * it under the terms of the GNU General Public License as published by
45 * the Free Software Foundation; either version 2 of the License, or
46 * (at your option) any later version.
47 *
48 * This program is distributed in the hope that it will be useful,
49 * but WITHOUT ANY WARRANTY; without even the implied warranty of
50 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
51 * GNU General Public License for more details.
52 *
53 * You should have received a copy of the GNU General Public License
54 * along with this program; if not, write to the Free Software
55 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
56 *
57 * MIT:
58 *
59 * Unless otherwise indicated, Source Code is licensed under MIT license.
60 * See further explanation attached in License Statement (distributed in the file
61 * LICENSE).
62 *
63 * Permission is hereby granted, free of charge, to any person obtaining a copy of
64 * this software and associated documentation files (the "Software"), to deal in
65 * the Software without restriction, including without limitation the rights to
66 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
67 * of the Software, and to permit persons to whom the Software is furnished to do
68 * so, subject to the following conditions:
69 *
70 * The above copyright notice and this permission notice shall be included in all
71 * copies or substantial portions of the Software.
72 *
73 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
74 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
75 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
76 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
77 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
78 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
79 * SOFTWARE.
80 *
81 */
82
83 #ifdef HAVE_CONFIG_H
84 #include "config.h"
85 #endif
86
87 #include "mpegtsmux_opus.h"
88 #include <string.h>
89 #include <gst/audio/audio.h>
90
91 #define GST_CAT_DEFAULT mpegtsmux_debug
92
93 GstBuffer *
mpegtsmux_prepare_opus(GstBuffer * buf,MpegTsPadData * pad_data,MpegTsMux * mux)94 mpegtsmux_prepare_opus (GstBuffer * buf, MpegTsPadData * pad_data,
95 MpegTsMux * mux)
96 {
97 gssize insize = gst_buffer_get_size (buf);
98 gsize outsize;
99 GstBuffer *outbuf;
100 GstMapInfo map;
101 guint n;
102 GstAudioClippingMeta *cmeta = gst_buffer_get_audio_clipping_meta (buf);
103
104 g_assert (!cmeta || cmeta->format == GST_FORMAT_DEFAULT);
105
106 outsize = 2 + insize / 255 + 1;
107 if (cmeta && cmeta->start)
108 outsize += 2;
109 if (cmeta && cmeta->end)
110 outsize += 2;
111
112 outbuf = gst_buffer_new_and_alloc (outsize);
113 gst_buffer_copy_into (outbuf, buf,
114 GST_BUFFER_COPY_METADATA | GST_BUFFER_COPY_TIMESTAMPS, 0, 0);
115 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
116 map.data[0] = 0x7f;
117 map.data[1] = 0xe0;
118
119 if (cmeta && cmeta->start)
120 map.data[1] |= 0x10;
121 if (cmeta && cmeta->end)
122 map.data[1] |= 0x08;
123
124 n = 2;
125 do {
126 g_assert (n < outsize);
127 /* FIXME: this should be using insize for writing here but ffmpeg and the
128 * only available sample stream from obe.tv are not including the control
129 * header size in au_size
130 */
131 map.data[n] = MIN (insize, 255);
132 insize -= 255;
133 n++;
134 } while (insize >= 0);
135
136 if (cmeta && cmeta->start) {
137 GST_WRITE_UINT16_BE (&map.data[n], cmeta->start);
138 n += 2;
139 }
140
141 if (cmeta && cmeta->end)
142 GST_WRITE_UINT16_BE (&map.data[n], cmeta->end);
143
144 gst_buffer_unmap (outbuf, &map);
145
146 outbuf = gst_buffer_append (outbuf, gst_buffer_ref (buf));
147
148 return outbuf;
149 }
150