81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/*
|
|
* codec2 utility functions
|
|
* Copyright (c) 2017 Tomas Härdin
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include "internal.h"
|
|
#include "libavcodec/codec2utils.h"
|
|
|
|
int avpriv_codec2_mode_bit_rate(void *logctx, int mode)
|
|
{
|
|
int frame_size = avpriv_codec2_mode_frame_size(logctx, mode);
|
|
int block_align = avpriv_codec2_mode_block_align(logctx, mode);
|
|
|
|
if (frame_size <= 0 || block_align <= 0) {
|
|
return 0;
|
|
}
|
|
|
|
return 8 * 8000 * block_align / frame_size;
|
|
}
|
|
|
|
int avpriv_codec2_mode_frame_size(void *logctx, int mode)
|
|
{
|
|
int frame_size_table[AVPRIV_CODEC2_MODE_MAX+1] = {
|
|
160, // 3200
|
|
160, // 2400
|
|
320, // 1600
|
|
320, // 1400
|
|
320, // 1300
|
|
320, // 1200
|
|
320, // 700
|
|
320, // 700B
|
|
320, // 700C
|
|
};
|
|
|
|
if (mode < 0 || mode > AVPRIV_CODEC2_MODE_MAX) {
|
|
av_log(logctx, AV_LOG_ERROR, "unknown codec2 mode %i, can't find frame_size\n", mode);
|
|
return 0;
|
|
} else {
|
|
return frame_size_table[mode];
|
|
}
|
|
}
|
|
|
|
int avpriv_codec2_mode_block_align(void *logctx, int mode)
|
|
{
|
|
int block_align_table[AVPRIV_CODEC2_MODE_MAX+1] = {
|
|
8, // 3200
|
|
6, // 2400
|
|
8, // 1600
|
|
7, // 1400
|
|
7, // 1300
|
|
6, // 1200
|
|
4, // 700
|
|
4, // 700B
|
|
4, // 700C
|
|
};
|
|
|
|
if (mode < 0 || mode > AVPRIV_CODEC2_MODE_MAX) {
|
|
av_log(logctx, AV_LOG_ERROR, "unknown codec2 mode %i, can't find block_align\n", mode);
|
|
return 0;
|
|
} else {
|
|
return block_align_table[mode];
|
|
}
|
|
}
|