1 /* GStreamer openaptx audio plugin
2 *
3 * Copyright (C) 2020 Igor V. Kovalenko <igor.v.kovalenko@gmail.com>
4 * Copyright (C) 2020 Thomas Weißschuh <thomas@t-8ch.de>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21 #ifndef __GST_OPENAPTX_PLUGIN_H__
22 #define __GST_OPENAPTX_PLUGIN_H__
23
24 #include <glib.h>
25
26 #define APTX_HD_DEFAULT 1
27 #define APTX_AUTOSYNC_DEFAULT TRUE
28
29 #define APTX_LATENCY_SAMPLES 90
30
31 /* always stereo */
32 #define APTX_NUM_CHANNELS 2
33
34 /* always S24LE */
35 #define APTX_SAMPLE_SIZE 3
36
37 /* always 4 samples per channel*/
38 #define APTX_SAMPLES_PER_CHANNEL 4
39
40 /* always 4 stereo samples */
41 #define APTX_SAMPLES_PER_FRAME (APTX_SAMPLES_PER_CHANNEL * APTX_NUM_CHANNELS)
42
43 /* fixed encoded frame size hd=0: LLRR, hd=1: LLLRRR */
44 #define APTX_FRAME_SIZE (2 * APTX_NUM_CHANNELS)
45 #define APTX_HD_FRAME_SIZE (3 * APTX_NUM_CHANNELS)
46
47 /* while finishing encoding, up to 92 frames will be produced */
48 #define APTX_FINISH_FRAMES 92
49
aptx_name(gboolean hd)50 static inline const char* aptx_name(gboolean hd)
51 {
52 return hd ? "aptX-HD" : "aptX";
53 }
54
55 /* fixed encoded frame size hd=FALSE: LLRR, hd=TRUE: LLLRRR */
aptx_frame_size(gboolean hd)56 static inline gsize aptx_frame_size(gboolean hd)
57 {
58 return hd ? APTX_HD_FRAME_SIZE : APTX_FRAME_SIZE;
59 }
60
61 #endif /* __GST_OPENAPTX_PLUGIN_H__ */
62