| /* Codecs handling */ |
| |
| /* |
| * This file is part of gapk (GSM Audio Pocket Knife). |
| * |
| * gapk is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation, either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * gapk 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with gapk. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #ifndef __GAPK_CODECS_H__ |
| #define __GAPK_CODECS_H__ |
| |
| #include <stdint.h> |
| |
| #define FR_CANON_LEN 33 |
| #define HR_CANON_LEN 14 |
| #define EFR_CANON_LEN 31 |
| #define PCM_CANON_LEN (160*sizeof(uint16_t)) |
| |
| enum codec_type { |
| CODEC_INVALID = 0, |
| CODEC_PCM, /* 16 bits PCM samples */ |
| CODEC_HR, /* GSM Half Rate codec GSM 06.20 */ |
| CODEC_FR, /* GSM Full Rate codec GSM 06.10 */ |
| CODEC_EFR, /* GSM Enhanced Full Rate codec GSM 06.60 */ |
| _CODEC_MAX, |
| }; |
| |
| #include <gapk/formats.h> /* need to import here because or enum interdep */ |
| |
| typedef int (*codec_conv_cb_t)(void *state, uint8_t *dst, const uint8_t *src); |
| |
| struct codec_desc { |
| enum codec_type type; |
| const char * name; |
| const char * description; |
| unsigned int canon_frame_len; |
| |
| enum format_type codec_enc_format_type; /* what the encoder provides */ |
| enum format_type codec_dec_format_type; /* what to give the decoder */ |
| void * (*codec_init)(void); |
| void (*codec_exit)(void *state); |
| codec_conv_cb_t codec_encode; |
| codec_conv_cb_t codec_decode; |
| }; |
| |
| const struct codec_desc *codec_get_from_type(enum codec_type type); |
| |
| #endif /* __GAPK_CODECS_H__ */ |