aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* 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];
}
}
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