diff options
| author | Harald Welte <laforge@gnumonks.org> | 2008-12-01 10:28:04 +0530 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2008-12-01 10:28:04 +0530 |
| commit | 10f2fcca8dd1be2719bccefa16fd9dac9a76c749 (patch) | |
| tree | 0b521a2ccc7d0d81a89e08b05650dec2421777d2 /gsmstack/conv.h | |
| parent | fd405f799425b6832a0c9cc7a56b07f43288b8b1 (diff) | |
[gsmdecode] import {interleave,conv}.[ch] from gsm-tvoid
* change convolutional decode to cope with TCH
* add tch.c file with reordering/decoding for TCH/F
Diffstat (limited to 'gsmstack/conv.h')
| -rw-r--r-- | gsmstack/conv.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gsmstack/conv.h b/gsmstack/conv.h new file mode 100644 index 0000000..4bd96a1 --- /dev/null +++ b/gsmstack/conv.h @@ -0,0 +1,24 @@ +/* This file was taken from gsm-tvoid */ +#ifndef _GSM_CONV_H +#define _GSM_CONV_H + +#define DATA_BLOCK_SIZE 184 +#define PARITY_SIZE 40 +#define FLUSH_BITS_SIZE 4 +#define PARITY_OUTPUT_SIZE (DATA_BLOCK_SIZE + PARITY_SIZE + FLUSH_BITS_SIZE) + +#define CONV_INPUT_SIZE_TCH_F 189 +#define CONV_INPUT_SIZE_CCH PARITY_OUTPUT_SIZE +#define CONV_MAX_INPUT_SIZE PARITY_OUTPUT_SIZE +#define CONV_SIZE (2 * CONV_MAX_INPUT_SIZE) + +#define BLOCKS 4 +#define iBLOCK_SIZE (CONV_SIZE / BLOCKS) +#define eBLOCK_SIZE (iBLOCK_SIZE + 2) + +int conv_decode(unsigned char *output, unsigned char *data, + unsigned int input_size); +int parity_check(unsigned char *data); +int compress_bits(unsigned char *dbuf, int dlen, unsigned char *src, int len); + +#endif /* _GSM_CONV_H */ |