1 /*
2 * codec2 utility functions
3 * Copyright (c) 2017 Tomas Härdin
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <string.h>
23 #include "internal.h"
24 #include "libavcodec/codec2utils.h"
25
26 #if LIBAVCODEC_VERSION_MAJOR < 59
avpriv_codec2_mode_bit_rate(void * logctx,int mode)27 int avpriv_codec2_mode_bit_rate(void *logctx, int mode)
28 {
29 int frame_size = avpriv_codec2_mode_frame_size(logctx, mode);
30 int block_align = avpriv_codec2_mode_block_align(logctx, mode);
31
32 if (frame_size <= 0 || block_align <= 0) {
33 return 0;
34 }
35
36 return 8 * 8000 * block_align / frame_size;
37 }
38
avpriv_codec2_mode_frame_size(void * logctx,int mode)39 int avpriv_codec2_mode_frame_size(void *logctx, int mode)
40 {
41 int frame_size_table[CODEC2_MODE_MAX+1] = {
42 160, // 3200
43 160, // 2400
44 320, // 1600
45 320, // 1400
46 320, // 1300
47 320, // 1200
48 320, // 700
49 320, // 700B
50 320, // 700C
51 };
52
53 if (mode < 0 || mode > CODEC2_MODE_MAX) {
54 av_log(logctx, AV_LOG_ERROR, "unknown codec2 mode %i, can't find frame_size\n", mode);
55 return 0;
56 } else {
57 return frame_size_table[mode];
58 }
59 }
60
avpriv_codec2_mode_block_align(void * logctx,int mode)61 int avpriv_codec2_mode_block_align(void *logctx, int mode)
62 {
63 int block_align_table[CODEC2_MODE_MAX+1] = {
64 8, // 3200
65 6, // 2400
66 8, // 1600
67 7, // 1400
68 7, // 1300
69 6, // 1200
70 4, // 700
71 4, // 700B
72 4, // 700C
73 };
74
75 if (mode < 0 || mode > CODEC2_MODE_MAX) {
76 av_log(logctx, AV_LOG_ERROR, "unknown codec2 mode %i, can't find block_align\n", mode);
77 return 0;
78 } else {
79 return block_align_table[mode];
80 }
81 }
82 #endif
83