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194 lines
6.5 KiB
194 lines
6.5 KiB
/* |
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HawkVoice Direct Interface (HVDI) cross platform network voice library |
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Copyright (C) 2001 Phil Frisbie, Jr. (phil@hawksoft.com) |
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This library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Library General Public |
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License as published by the Free Software Foundation; either |
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version 2 of the License, or (at your option) any later version. |
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Library General Public License for more details. |
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You should have received a copy of the GNU Library General Public |
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License along with this library; if not, write to the |
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Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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Boston, MA 02111-1307, USA. |
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Or go to http://www.gnu.org/copyleft/lgpl.html |
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*/ |
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#ifndef HVDI_H |
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#define HVDI_H |
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#include "blowfish/blowfish.h" |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#define HVDI_MAJOR_VERSION 0 |
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#define HVDI_MINOR_VERSION 7 |
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#define HVDI_VERSION_STRING "HVDI 0.7 beta" |
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/* This was copied from nl.h so that it did not need to be included */ |
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#if defined WIN32 || defined WIN64 |
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#pragma warning (disable:4514) /* disable "unreferenced inline function has |
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been removed" warning */ |
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/* The default build for Windows is as a DLL. */ |
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/* If you want a static library, define WIN_STATIC_LIB. */ |
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#ifdef WIN_STATIC_LIB |
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#define NL_EXP |
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#else |
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#if defined __LCC__ |
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#define NL_EXP extern |
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#else |
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#define NL_EXP __declspec(dllexport) |
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#endif |
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#endif |
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#define NL_APIENTRY __stdcall |
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#define NL_CALLBACK __cdecl |
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#ifdef __GNUC__ |
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#define NL_INLINE extern __inline__ |
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#else |
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#define NL_INLINE __inline |
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#endif |
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#else |
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#define NL_EXP extern |
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#define NL_APIENTRY |
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#define NL_CALLBACK |
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#ifdef __GNUC__ |
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#define NL_INLINE extern __inline__ |
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#else |
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#define NL_INLINE inline /* assuming C99 compliant compiler */ |
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#endif /* __GNUC__ */ |
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#endif /* WIN32 || WIN64 */ |
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#ifndef NL_INVALID |
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#define NL_INVALID (-1) |
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#define NL_FALSE (0) |
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#define NL_TRUE (1) |
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#endif |
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/* We will use HVDI or hvdi to prefix all HawkVoiceDI defines and functions */ |
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/* |
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The internal state of the codec. This is READ ONLY! You can read hvdi_dec_state->codec |
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if you want to know what type of codec is being used on the other side, but DO NOT |
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write to this structure!! I could have hidden these structures behind an index, but |
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this IS low level quick and dirty ;) |
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hvdi_enc_state and hvdi_dec_state are defined separately to help the compiler spot |
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your mistakes ;) |
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*/ |
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typedef struct |
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{ |
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unsigned char codec; /* the codec used with the last packet */ |
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unsigned short sequence;/* the sequence number of the last packet */ |
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void *state; /* the codec state */ |
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} hvdi_enc_state; |
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typedef struct |
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{ |
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unsigned char codec; /* the codec used with the last packet */ |
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unsigned short sequence;/* the sequence number of the last packet */ |
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void *state; /* the codec state */ |
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} hvdi_dec_state; |
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typedef struct |
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{ |
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int rate; /* HVDI_VOX_FAST, HVDI_VOX_MEDIUM, or HVDI_VOX_SLOW */ |
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int noisethreshold; /* 0(always pass) to 1000(never pass), 300 is a good starting point */ |
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int samplecount; /* init to 0; used internally by hvdiVOX */ |
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} hvdi_vox; |
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typedef struct |
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{ |
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unsigned long lcmrate; /* least common multiple of rates */ |
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unsigned long inskip, outskip; /* LCM increments for I & O rates */ |
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unsigned long total; |
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unsigned long intot, outtot; /* total samples in terms of LCM rate */ |
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long lastsamp; |
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} hvdi_rate; |
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typedef struct |
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{ |
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unsigned int sample_max; |
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int counter; |
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float gain; |
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float peak; |
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int silence_counter; |
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} hvdi_agc; |
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/* The basic codecs, from hawkvoice.h */ |
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#define HV_2_4K_CODEC 0x0001 /* LPC-10 2.4 Kbps codec */ |
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#define HV_4_8K_CODEC 0x0002 /* LPC 4.8 Kbps codec */ |
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#define HV_13_2K_CODEC 0x0004 /* GSM 13.2 Kbps codec */ |
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#define HV_32K_CODEC 0x0008 /* Intel/DVI ADPCM 32 Kbps codec */ |
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#define HV_64K_CODEC 0x0010 /* G.711 u-law 64 Kbps codec */ |
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#define HV_1_4K_CODEC 0x0011 /* OpenLPC 1.4 Kbps codec */ |
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#define HV_1_8K_CODEC 0x0012 /* OpenLPC 1.8 Kbps codec */ |
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/* Alternate codec names */ |
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#define HV_LPC10_CODEC HV_2_4K_CODEC |
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#define HV_LPC_CODEC HV_4_8K_CODEC |
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#define HV_GSM_CODEC HV_13_2K_CODEC |
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#define HV_ADPCM_32_CODEC HV_32K_CODEC |
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#define HV_PCM_64_CODEC HV_64K_CODEC |
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#define HV_G_711_CODEC HV_64K_CODEC |
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#define HV_ULAW_CODEC HV_64K_CODEC |
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#define HV_LPC_1_4_CODEC HV_1_4K_CODEC |
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#define HV_LPC_1_8_CODEC HV_1_8K_CODEC |
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/* VOX options */ |
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/* how many samples of silence to wait after voice stops */ |
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#define HVDI_VOX_FAST 4000 /* 1/2 second */ |
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#define HVDI_VOX_MEDIUM 8000 /* 1 second */ |
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#define HVDI_VOX_SLOW 12000 /* 1 1/2 seconds */ |
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/* HawkVoiceDI API */ |
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NL_EXP hvdi_enc_state* NL_APIENTRY hvdiCreateEncoderState(void); |
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NL_EXP hvdi_dec_state* NL_APIENTRY hvdiCreateDecoderState(void); |
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NL_EXP void NL_APIENTRY hvdiFreeEncoderState(hvdi_enc_state *state); |
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NL_EXP void NL_APIENTRY hvdiFreeDecoderState(hvdi_dec_state *state); |
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NL_EXP int NL_APIENTRY hvdiSetCodec(unsigned char codec, hvdi_enc_state *state); |
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NL_EXP BF_KEY* NL_APIENTRY hvdiMakeEncryptionKey(const char *string); |
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NL_EXP int NL_APIENTRY hvdiIsVoicePacket(unsigned char *packet, int length); |
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NL_EXP int NL_APIENTRY hvdiDecodePacket(unsigned char *packet, int paclen, short *buffer, |
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int buflen, BF_KEY *key, hvdi_dec_state *state); |
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NL_EXP int NL_APIENTRY hvdiEncodePacket(short *buffer, int buflen, unsigned char *packet, |
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int paclen, BF_KEY *key, hvdi_enc_state *state); |
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NL_EXP int NL_APIENTRY hvdiVOX(short *buffer, int buflen, hvdi_vox *vox); |
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NL_EXP void NL_APIENTRY hvdiRateInit(hvdi_rate *rate, int inrate, int outrate); |
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NL_EXP void NL_APIENTRY hvdiRateFlow(hvdi_rate *rate, short *inbuf, short *outbuf, int *inlen, int *outlen); |
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NL_EXP void NL_APIENTRY hvdiAGCInit(hvdi_agc *agc, float level); |
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NL_EXP void NL_APIENTRY hvdiAGC(hvdi_agc *agc, short *buffer, int len); |
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NL_EXP void NL_APIENTRY hvdiMix(short *outbuf, short **inbuf, int number, int inlen); |
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#ifdef __cplusplus |
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} /* extern "C" */ |
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#endif |
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#endif /* HVDI_H */ |
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