| /* |
| * 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 |
| */ |
| |
| #ifndef AVCODEC_CODEC2UTILS_H |
| #define AVCODEC_CODEC2UTILS_H |
| |
| #include <stdint.h> |
| |
| #include "version.h" |
| |
| //Highest mode we're willing to use. |
| //Don't want to let users accidentally produce files that can't be decoded in the future. |
| //CODEC2_MODE_WB (9) is experimental/unstable as of 2017-11-23. |
| #define CODEC2_MODE_MAX 8 //CODEC2_MODE_700C |
| |
| //Used by both codec2raw demuxer and libcodec2 encoder. |
| //The integers match the values in codec2.h, so "3200" -> CODEC2_MODE_3000 = 0 and so on. |
| //It is possible that we're linked to a version of libcodec2 that lacks some of these modes. |
| //For example Debian stretch ships with libcodec2.so.0.4 which lacks CODEC2_MODE_700C. |
| #define CODEC2_AVOPTIONS(desc, classname, min_val, default_val, option_flags) \ |
| { "mode", desc, offsetof(classname, mode), AV_OPT_TYPE_INT, {.i64 = default_val}, min_val, CODEC2_MODE_MAX, .flags=option_flags, .unit="codec2_mode"},\ |
| { "3200", "3200", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, .flags=option_flags, .unit="codec2_mode"},\ |
| { "2400", "2400", 0, AV_OPT_TYPE_CONST, {.i64 = 1}, .flags=option_flags, .unit="codec2_mode"},\ |
| { "1600", "1600", 0, AV_OPT_TYPE_CONST, {.i64 = 2}, .flags=option_flags, .unit="codec2_mode"},\ |
| { "1400", "1400", 0, AV_OPT_TYPE_CONST, {.i64 = 3}, .flags=option_flags, .unit="codec2_mode"},\ |
| { "1300", "1300", 0, AV_OPT_TYPE_CONST, {.i64 = 4}, .flags=option_flags, .unit="codec2_mode"},\ |
| { "1200", "1200", 0, AV_OPT_TYPE_CONST, {.i64 = 5}, .flags=option_flags, .unit="codec2_mode"},\ |
| { "700", "700", 0, AV_OPT_TYPE_CONST, {.i64 = 6}, .flags=option_flags, .unit="codec2_mode"},\ |
| { "700B", "700B", 0, AV_OPT_TYPE_CONST, {.i64 = 7}, .flags=option_flags, .unit="codec2_mode"},\ |
| { "700C", "700C", 0, AV_OPT_TYPE_CONST, {.i64 = 8}, .flags=option_flags, .unit="codec2_mode"} |
| |
| #if LIBAVCODEC_VERSION_MAJOR < 59 |
| //The three following functions are here to avoid needing libavformat/codec2.c to depend on libcodec2 |
| |
| //Computes bitrate from mode, with frames rounded up to the nearest octet. |
| //So 700 bit/s (28 bits/frame) becomes 800 bits/s (32 bits/frame). |
| //logctx is used for av_log() |
| //Returns <0 if mode is invalid |
| int avpriv_codec2_mode_bit_rate(void *logctx, int mode); |
| |
| //Mimics codec2_samples_per_frame() |
| int avpriv_codec2_mode_frame_size(void *logctx, int mode); |
| |
| //Mimics (codec2_bits_per_frame()+7)/8 |
| int avpriv_codec2_mode_block_align(void *logctx, int mode); |
| #endif |
| |
| #define CODEC2_EXTRADATA_SIZE 4 |
| |
| //Used in codec2raw demuxer and libcodec2 encoder |
| static inline void codec2_make_extradata(uint8_t *ptr, int mode) { |
| //version 0.8 as of 2017-12-23 (r3386) |
| ptr[0] = 0; //major |
| ptr[1] = 8; //minor |
| ptr[2] = mode; //mode |
| ptr[3] = 0; //flags |
| } |
| |
| static inline uint8_t codec2_mode_from_extradata(uint8_t *ptr) { |
| return ptr[2]; |
| } |
| |
| #endif /* AVCODEC_CODEC2UTILS_H */ |