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
avpriv_codec2_mode_bit_rate(void * logctx,int mode)26 int avpriv_codec2_mode_bit_rate(void *logctx, int mode)
27 {
28 int frame_size = avpriv_codec2_mode_frame_size(logctx, mode);
29 int block_align = avpriv_codec2_mode_block_align(logctx, mode);
30
31 if (frame_size <= 0 || block_align <= 0) {
32 return 0;
33 }
34
35 return 8 * 8000 * block_align / frame_size;
36 }
37
avpriv_codec2_mode_frame_size(void * logctx,int mode)38 int avpriv_codec2_mode_frame_size(void *logctx, int mode)
39 {
40 int frame_size_table[AVPRIV_CODEC2_MODE_MAX+1] = {
41 160, // 3200
42 160, // 2400
43 320, // 1600
44 320, // 1400
45 320, // 1300
46 320, // 1200
47 320, // 700
48 320, // 700B
49 320, // 700C
50 };
51
52 if (mode < 0 || mode > AVPRIV_CODEC2_MODE_MAX) {
53 av_log(logctx, AV_LOG_ERROR, "unknown codec2 mode %i, can't find frame_size\n", mode);
54 return 0;
55 } else {
56 return frame_size_table[mode];
57 }
58 }
59
avpriv_codec2_mode_block_align(void * logctx,int mode)60 int avpriv_codec2_mode_block_align(void *logctx, int mode)
61 {
62 int block_align_table[AVPRIV_CODEC2_MODE_MAX+1] = {
63 8, // 3200
64 6, // 2400
65 8, // 1600
66 7, // 1400
67 7, // 1300
68 6, // 1200
69 4, // 700
70 4, // 700B
71 4, // 700C
72 };
73
74 if (mode < 0 || mode > AVPRIV_CODEC2_MODE_MAX) {
75 av_log(logctx, AV_LOG_ERROR, "unknown codec2 mode %i, can't find block_align\n", mode);
76 return 0;
77 } else {
78 return block_align_table[mode];
79 }
80 }
81