Date: Tue, 1 Feb 2000 14:03:31 -0500 (EST) From: Chuck Robey <chuckr@picnic.mat.net> To: John Reynolds~ <jreynold@sedona.ch.intel.com> Cc: freebsd-multimedia@FreeBSD.ORG Subject: Re: Sphinx: Speech Recognition ... Message-ID: <Pine.BSF.4.21.0002011402340.305-200000@picnic.mat.net> In-Reply-To: <14487.6895.197127.828831@hip186.ch.intel.com>
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[-- Attachment #1 --] On Tue, 1 Feb 2000, John Reynolds~ wrote: > > [ On Tuesday, February 1, Parag Patel wrote: ] > > > > According to the Project Info page's Release Notes and Changelog info, > > a new tarball is supposed to have ad-freebsd.c in it, but it doesn't > > seem to have it. > > > > > > we'll have to bug them about it then .... It's available from their cvsweb interface. I'm attaching a copy I got that way here in this mail. > > ---------------------------------------------------------------------------- Chuck Robey | Interests include C & Java programming, FreeBSD, chuckr@picnic.mat.net | electronics, communications, and signal processing. New Year's Resolution: I will not sphroxify gullible people into looking up fictitious words in the dictionary. ---------------------------------------------------------------------------- [-- Attachment #2 --] /* ==================================================================== * Copyright (c) 1997-2000 Carnegie Mellon University. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The names "Sphinx" and "Carnegie Mellon" must not be used to * endorse or promote products derived from this software without * prior written permission. To obtain permission, contact * sphinx@cs.cmu.edu. * * 4. Products derived from this software may not be called "Sphinx" * nor may "Sphinx" appear in their names without prior written * permission of Carnegie Mellon University. To obtain permission, * contact sphinx@cs.cmu.edu. * * 5. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by Carnegie * Mellon University (http://www.speech.cs.cmu.edu/)." * * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * ==================================================================== * */ /* Sphinx II libad (FreeBSD) * ^^^^^^^^^^^^^^^^^^^^^^^ * $Id: ad_i386_freebsd.c,v 1.1 2000/01/28 23:42:14 awb Exp $ * * John G. Dorsey (jd5q+@andrew.cmu.edu) * Engineering Design Research Center * Carnegie Mellon University * ******************************************************************** * * REVISION HISTORY * * 28-Jan-2000 Alan W Black (awb@cs.cmu.edu. added FreeBSD support (by simply cloning the linux support). * 09-Aug-1999 Kevin Lenzo (lenzo@cs.cmu.edu) at Cernegie Mellon University. * Incorporated nickr@cs.cmu.edu's changes (marked below) and * SPS_EPSILON to allow for sample rates that are "close enough". * * 15-Jun-1999 M. K. Ravishankar (rkm@cs.cmu.edu) Consolidated all ad functions into * this one file. Added ad_open_sps(). * Other cosmetic changes for consistency (e.g., use of err.h). * * 18-May-1999 Kevin Lenzo (lenzo@cs.cmu.edu) added <errno.h>. */ #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <machine/soundcard.h> #include <errno.h> #include "err.h" #include "ad.h" #define AUDIO_FORMAT AFMT_S16_LE /* 16-bit signed, little endian */ #define INPUT_GAIN (85) #define SPS_EPSILON 200 #ifndef SNDCTL_DSP_SETDUPLEX #define SNDCTL_DSP_SETDUPLEX -1 #endif ad_rec_t *ad_open_sps (int32 sps) { ad_rec_t *handle; int32 dspFD, mixerFD; int32 nonBlocking=1, sourceMic=1, inputGain=INPUT_GAIN; int32 audioFormat=AUDIO_FORMAT; int32 dspCaps=0; int32 sampleRate; if (sps != DEFAULT_SAMPLES_PER_SEC) { if(abs(sps - DEFAULT_SAMPLES_PER_SEC) <= SPS_EPSILON) { E_WARN("Audio sampling rate %d is within %d of %d samples/sec\n", sps, SPS_EPSILON, DEFAULT_SAMPLES_PER_SEC); } else { E_ERROR("Audio sampling rate %d not supported; must be %d samples/sec\n", sps, DEFAULT_SAMPLES_PER_SEC); return NULL; } } sampleRate = sps; /* Used to have O_NDELAY. */ if((dspFD = open ("/dev/dsp", O_RDONLY))<0){ if (errno == EBUSY) E_ERROR("Audio device busy\n"); else E_ERROR("Failed to open audio device: %s\n", strerror(errno)); return NULL; } if (ioctl (dspFD, SNDCTL_DSP_SYNC, 0) < 0){ E_ERROR("Audio ioctl(SYNC) failed: %s\n", strerror(errno)); close (dspFD); return NULL; } if (ioctl (dspFD, SNDCTL_DSP_RESET, 0) < 0){ E_ERROR("Audio ioctl(RESET) failed: %s\n", strerror(errno)); close (dspFD); return NULL; } if (ioctl (dspFD, SNDCTL_DSP_SETFMT, &audioFormat) < 0){ E_ERROR("Audio ioctl(SETFMT 0x%x) failed: %s\n", audioFormat, strerror(errno)); close (dspFD); return NULL; } if (audioFormat != AUDIO_FORMAT) { E_ERROR("Audio ioctl(SETFMT): 0x%x, expected: 0x%x\n", audioFormat, AUDIO_FORMAT); close (dspFD); return NULL; } if (ioctl (dspFD, SNDCTL_DSP_SPEED, &sampleRate) < 0) { E_ERROR("Audio ioctl(SPEED %d) failed %s\n", sampleRate, strerror(errno)); close (dspFD); return NULL; } if (sampleRate != sps) { E_ERROR("Audio ioctl(SPEED): %d, expected: %d\n", sampleRate, sps); close (dspFD); return NULL; } if (ioctl (dspFD, SNDCTL_DSP_NONBLOCK, &nonBlocking) < 0) { E_ERROR("ioctl(NONBLOCK) failed: %s\n", strerror(errno)); close (dspFD); return NULL; } if (ioctl (dspFD, SNDCTL_DSP_GETCAPS, &dspCaps) < 0) { E_ERROR("ioctl(GETCAPS) failed: %s\n", strerror(errno)); close (dspFD); return NULL; } #if 0 E_INFO ("DSP Revision %d:\n", dspCaps&DSP_CAP_REVISION); E_INFO ("DSP %s duplex capability.\n", (dspCaps&DSP_CAP_DUPLEX)?"has":"does not have"); E_INFO ("DSP %s real time capability.\n", (dspCaps&DSP_CAP_REALTIME)?"has":"does not have"); E_INFO ("DSP %s batch capability.\n", (dspCaps&DSP_CAP_BATCH)?"has":"does not have"); E_INFO ("DSP %s coprocessor capability.\n", (dspCaps&DSP_CAP_COPROC)?"has":"does not have"); E_INFO ("DSP %s trigger capability.\n", (dspCaps&DSP_CAP_TRIGGER)?"has":"does not have"); E_INFO ("DSP %s memory map capability.\n", (dspCaps&DSP_CAP_MMAP)?"has":"does not have"); #endif if ((dspCaps & DSP_CAP_DUPLEX) && (ioctl (dspFD, SNDCTL_DSP_SETDUPLEX, 0) < 0)) E_ERROR("ioctl(SETDUPLEX) failed: %s\n", strerror(errno)); /* Patched by N. Roy (nickr@ri.cmu.edu), 99/7/23. Previously, mixer was set through dspFD. This is incorrect. Should be set through mixerFD, /dev/mixer. Also, only the left channel volume was being set. */ if((mixerFD=open("/dev/mixer", O_RDONLY))<0){ if(errno==EBUSY){ fprintf(stderr, "%s %d: mixer device busy.\n", __FILE__, __LINE__); fprintf(stderr, "%s %d: Using current setting.\n", __FILE__, __LINE__); } else { fprintf(stderr, "%s %d: %s\n", __FILE__, __LINE__, strerror(errno)); exit(1); } } if (mixerFD >= 0) { if(ioctl(mixerFD, SOUND_MIXER_WRITE_RECSRC, &sourceMic)<0) { if (errno == ENXIO) fprintf(stderr, "%s %d: can't set mic source for this device.\n", __FILE__, __LINE__); else { fprintf(stderr, "%s %d: mixer set to mic: %s\n", __FILE__, __LINE__, strerror(errno)); exit(1); } } /* Set the same gain for left and right channels. */ inputGain = inputGain << 8 | inputGain; if(ioctl(mixerFD, SOUND_MIXER_WRITE_MIC, &inputGain)<0){ fprintf(stderr, "%s %d: mixer input gain to %d: %s\n", __FILE__, __LINE__, strerror(errno)); exit(1); } close(mixerFD); } if ((handle = (ad_rec_t *) calloc (1, sizeof(ad_rec_t))) == NULL) E_FATAL("calloc(%d) failed\n", sizeof(ad_rec_t)); handle->dspFD = dspFD; handle->recording = 0; handle->sps = sps; handle->bps = sizeof(int16); return(handle); } ad_rec_t *ad_open ( void ) { return ad_open_sps (DEFAULT_SAMPLES_PER_SEC); } int32 ad_close (ad_rec_t *handle) { if (handle->dspFD < 0) return AD_ERR_NOT_OPEN; if (handle->recording) { if (ad_stop_rec (handle) < 0) return AD_ERR_GEN; } close (handle->dspFD); free(handle); return(0); } int32 ad_start_rec (ad_rec_t *handle) { if (handle->dspFD < 0) return AD_ERR_NOT_OPEN; if (handle->recording) return AD_ERR_GEN; /* Sample rate, format, input mix settings, &c. are configured * with ioctl(2) calls under Linux. It makes more sense to handle * these at device open time and consider the state of the device * to be fixed until closed. */ handle->recording = 1; /* rkm@cs: This doesn't actually do anything. How do we turn recording on/off? */ return(0); } int32 ad_stop_rec (ad_rec_t *handle) { if (handle->dspFD < 0) return AD_ERR_NOT_OPEN; if (! handle->recording) return AD_ERR_GEN; if (ioctl (handle->dspFD, SNDCTL_DSP_SYNC, 0) < 0) { E_ERROR("Audio ioctl(SYNC) failed: %s\n", strerror(errno)); return AD_ERR_GEN; } handle->recording = 0; return (0); } int32 ad_read (ad_rec_t *handle, int16 *buf, int32 max) { int32 length; length = max * handle->bps; /* #samples -> #bytes */ if ((length = read (handle->dspFD, buf, length)) > 0) { #if 0 if ((length % handle->bps) != 0) E_ERROR("Audio read returned non-integral #sample bytes (%d)\n", length); #endif length /= handle->bps; } if (length < 0) { E_ERROR("Audio read error\n"); return AD_ERR_GEN; } if ((length == 0) && (! handle->recording)) return AD_EOF; return length; }
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