LCOV - code coverage report
Current view: top level - libavcodec - codec2utils.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 10 0.0 %
Date: 2018-05-20 11:54:08 Functions: 0 3 0.0 %

          Line data    Source code
       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             : #ifndef AVCODEC_CODEC2UTILS_H
      23             : #define AVCODEC_CODEC2UTILS_H
      24             : 
      25             : #include <stdint.h>
      26             : 
      27             : //Highest mode we're willing to use.
      28             : //Don't want to let users accidentally produce files that can't be decoded in the future.
      29             : //CODEC2_MODE_WB (9) is experimental/unstable as of 2017-11-23.
      30             : #define AVPRIV_CODEC2_MODE_MAX 8 //CODEC2_MODE_700C
      31             : 
      32             : //Used by both codec2raw demuxer and libcodec2 encoder.
      33             : //The integers match the values in codec2.h, so "3200" -> CODEC2_MODE_3000 = 0 and so on.
      34             : //It is possible that we're linked to a version of libcodec2 that lacks some of these modes.
      35             : //For example Debian stretch ships with libcodec2.so.0.4 which lacks CODEC2_MODE_700C.
      36             : #define AVPRIV_CODEC2_AVOPTIONS(desc, classname, min_val, default_val, option_flags) \
      37             :     { "mode", desc, offsetof(classname, mode), AV_OPT_TYPE_INT, {.i64 = default_val}, min_val, AVPRIV_CODEC2_MODE_MAX, .flags=option_flags, .unit="codec2_mode"},\
      38             :     { "3200", "3200", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, .flags=option_flags, .unit="codec2_mode"},\
      39             :     { "2400", "2400", 0, AV_OPT_TYPE_CONST, {.i64 = 1}, .flags=option_flags, .unit="codec2_mode"},\
      40             :     { "1600", "1600", 0, AV_OPT_TYPE_CONST, {.i64 = 2}, .flags=option_flags, .unit="codec2_mode"},\
      41             :     { "1400", "1400", 0, AV_OPT_TYPE_CONST, {.i64 = 3}, .flags=option_flags, .unit="codec2_mode"},\
      42             :     { "1300", "1300", 0, AV_OPT_TYPE_CONST, {.i64 = 4}, .flags=option_flags, .unit="codec2_mode"},\
      43             :     { "1200", "1200", 0, AV_OPT_TYPE_CONST, {.i64 = 5}, .flags=option_flags, .unit="codec2_mode"},\
      44             :     { "700",  "700",  0, AV_OPT_TYPE_CONST, {.i64 = 6}, .flags=option_flags, .unit="codec2_mode"},\
      45             :     { "700B", "700B", 0, AV_OPT_TYPE_CONST, {.i64 = 7}, .flags=option_flags, .unit="codec2_mode"},\
      46             :     { "700C", "700C", 0, AV_OPT_TYPE_CONST, {.i64 = 8}, .flags=option_flags, .unit="codec2_mode"}
      47             : 
      48             : //The three following functions are here to avoid needing libavformat/codec2.c to depend on libcodec2
      49             : 
      50             : //Computes bitrate from mode, with frames rounded up to the nearest octet.
      51             : //So 700 bit/s (28 bits/frame) becomes 800 bits/s (32 bits/frame).
      52             : //logctx is used for av_log()
      53             : //Returns <0 if mode is invalid
      54             : int avpriv_codec2_mode_bit_rate(void *logctx, int mode);
      55             : 
      56             : //Mimics codec2_samples_per_frame()
      57             : int avpriv_codec2_mode_frame_size(void *logctx, int mode);
      58             : 
      59             : //Mimics (codec2_bits_per_frame()+7)/8
      60             : int avpriv_codec2_mode_block_align(void *logctx, int mode);
      61             : 
      62             : #define AVPRIV_CODEC2_EXTRADATA_SIZE 4
      63             : 
      64             : //Used in codec2raw demuxer and libcodec2 encoder
      65           0 : static inline void avpriv_codec2_make_extradata(uint8_t *ptr, int mode) {
      66             :     //version 0.8 as of 2017-12-23 (r3386)
      67           0 :     ptr[0] = 0;     //major
      68           0 :     ptr[1] = 8;     //minor
      69           0 :     ptr[2] = mode;  //mode
      70           0 :     ptr[3] = 0;     //flags
      71           0 : }
      72             : 
      73             : //Returns version as a 16-bit value. 0.8 -> 0x0008
      74           0 : static inline uint16_t avpriv_codec2_version_from_extradata(uint8_t *ptr) {
      75           0 :     return (ptr[0] << 8) + ptr[1];
      76             : }
      77             : 
      78           0 : static inline uint8_t avpriv_codec2_mode_from_extradata(uint8_t *ptr) {
      79           0 :     return ptr[2];
      80             : }
      81             : 
      82             : #endif /* AVCODEC_CODEC2UTILS_H */

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