diff options
author | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2003-01-10 22:58:35 +0000 |
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committer | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2003-01-10 22:58:35 +0000 |
commit | ae45e8aaefd1e199616c6c633704ae17a52418de (patch) | |
tree | fb0c1220d904c61d9bb5a5d91cda04ad1abc896c | |
parent | 85b12813204767a23c85850cba4aeffd4474a9f2 (diff) |
Version 0.3.0 from FTP
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@583 f38db490-d61c-443f-a65b-d21fe96a405b
-rwxr-xr-x | include/asterisk/dsp.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/include/asterisk/dsp.h b/include/asterisk/dsp.h new file mode 100755 index 000000000..6bf3a1683 --- /dev/null +++ b/include/asterisk/dsp.h @@ -0,0 +1,73 @@ +/* + * Asterisk -- A telephony toolkit for Linux. + * + * Convenient Signal Processing routines + * + * Copyright (C) 1999, Mark Spencer + * + * Mark Spencer <markster@linux-support.net> + * + * This program is free software, distributed under the terms of + * the GNU General Public License + */ + +#ifndef _ASTERISK_DSP_H +#define _ASTERISK_DSP_H + +#define DSP_FEATURE_SILENCE_SUPPRESS (1 << 0) +#define DSP_FEATURE_BUSY_DETECT (1 << 1) +#define DSP_FEATURE_CALL_PROGRESS (1 << 2) +#define DSP_FEATURE_DTMF_DETECT (1 << 3) + +#define DSP_DIGITMODE_DTMF 0 /* Detect DTMF digits */ +#define DSP_DIGITMODE_MF 1 /* Detect MF digits */ + +#define DSP_DIGITMODE_NOQUELCH (1 << 8) /* Do not quelch DTMF from in-band */ +#define DSP_DIGITMODE_MUTECONF (1 << 9) /* Mute conference */ +#define DSP_DIGITMODE_MUTEMAX (1 << 10) /* Delay audio by a frame to try to extra quelch */ +#define DSP_DIGITMODE_RELAXDTMF (1 << 11) /* "Radio" mode (relaxed DTMF) */ + +struct ast_dsp; + +struct ast_dsp *ast_dsp_new(void); +void ast_dsp_free(struct ast_dsp *dsp); +/* Set threshold value for silence */ +void ast_dsp_set_threshold(struct ast_dsp *dsp, int threshold); + +/* Set number of required cadences for busy */ +void ast_dsp_set_busy_count(struct ast_dsp *dsp, int cadences); + +/* Scans for progress indication in audio */ +int ast_dsp_call_progress(struct ast_dsp *dsp, struct ast_frame *inf); + +/* Return AST_FRAME_NULL frames when there is silence, AST_FRAME_BUSY on + busies, and call progress, all dependent upon which features are enabled */ +struct ast_frame *ast_dsp_process(struct ast_channel *chan, struct ast_dsp *dsp, struct ast_frame *inf, int needlock); + +/* Return non-zero if this is silence. Updates "totalsilence" with the total + number of seconds of silence */ +int ast_dsp_silence(struct ast_dsp *dsp, struct ast_frame *f, int *totalsilence); + +/* Return non-zero if historically this should be a busy, request that + ast_dsp_silence has already been called */ +int ast_dsp_busydetect(struct ast_dsp *dsp); + +/* Return non-zero if DTMF hit was found */ +int ast_dsp_digitdetect(struct ast_dsp *dsp, struct ast_frame *f); + +/* Reset total silence count */ +void ast_dsp_reset(struct ast_dsp *dsp); + +/* Reset DTMF detector */ +void ast_dsp_digitreset(struct ast_dsp *dsp); + +/* Select feature set */ +void ast_dsp_set_features(struct ast_dsp *dsp, int features); + +/* Get pending DTMF/MF digits */ +int ast_dsp_getdigits(struct ast_dsp *dsp, char *buf, int max); + +/* Set digit mode */ +int ast_dsp_digitmode(struct ast_dsp *dsp, int digitmode); + +#endif |