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