diff options
author | Andreas Eversberg <jolly@eversberg.eu> | 2020-10-03 16:25:48 +0200 |
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committer | Andreas Eversberg <jolly@eversberg.eu> | 2020-12-29 19:02:57 +0100 |
commit | 58f1c9a91226f4954a4799fab082f186923aa806 (patch) | |
tree | ab137478c73bcb079e3031cbc65ecc7ef37f452e /src/libdtmf/dtmf_encode.h | |
parent | fde7cc2ce319bf294ded54da0822672fe33b1923 (diff) |
Add libraries from Osmocom-Analog
Diffstat (limited to 'src/libdtmf/dtmf_encode.h')
-rw-r--r-- | src/libdtmf/dtmf_encode.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/libdtmf/dtmf_encode.h b/src/libdtmf/dtmf_encode.h new file mode 100644 index 0000000..15ac05e --- /dev/null +++ b/src/libdtmf/dtmf_encode.h @@ -0,0 +1,14 @@ + +typedef struct dtmf_enc { + int samplerate; /* samplerate */ + char tone; /* current tone to be played */ + int pos; /* sample counter for tone */ + int max; /* max number of samples for tone duration */ + double phaseshift65536[2]; /* how much the phase of sine wave changes per sample */ + double phase65536[2]; /* current phase */ +} dtmf_enc_t; + +void dtmf_encode_init(dtmf_enc_t *dtmf, int samplerate, double dBm_level); +void dtmf_encode_set_tone(dtmf_enc_t *dtmf, char tone); +void dtmf_encode(dtmf_enc_t *dtmf, sample_t *samples, int length); + |