+++ /dev/null
-/*
-** Copyright (C) 1999-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
-**
-** This program is free software; you can redistribute it and/or modify
-** it under the terms of the GNU Lesser General Public License as published by
-** the Free Software Foundation; either version 2.1 of the License, or
-** (at your option) any later version.
-**
-** This program is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-** GNU Lesser General Public License for more details.
-**
-** You should have received a copy of the GNU Lesser General Public License
-** along with this program; if not, write to the Free Software
-** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-*/
-
-
-#include "sfconfig.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#if HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#include <string.h>
-#include <errno.h>
-
-#include "common.h"
-
-typedef struct
-{ int le_float ;
- int be_float ;
- int le_int_24_32 ;
- int be_int_24_32 ;
-} VOTE ;
-
-
-static void vote_for_format (VOTE * vote, const unsigned char * data, int datalen) ;
-
-int
-audio_detect (SF_PRIVATE * psf, AUDIO_DETECT *ad, const unsigned char * data, int datalen)
-{ VOTE vote ;
-
- if (psf == NULL)
- return 0 ;
-
- if (ad == NULL || datalen < 256)
- return 0 ;
-
- vote_for_format (&vote, data, datalen) ;
-
- psf_log_printf (psf, "audio_detect :\n"
- " le_float : %d\n"
- " be_float : %d\n"
- " le_int_24_32 : %d\n"
- " be_int_24_32 : %d\n",
- vote.le_float, vote.be_float, vote.le_int_24_32, vote.be_int_24_32) ;
-
- if (0) puts (psf->logbuffer) ;
-
- if (ad->endianness == SF_ENDIAN_LITTLE && vote.le_float > (3 * datalen) / 4)
- { /* Almost certainly 32 bit floats. */
- return SF_FORMAT_FLOAT ;
- } ;
-
- if (ad->endianness == SF_ENDIAN_LITTLE && vote.le_int_24_32 > (3 * datalen) / 4)
- { /* Almost certainly 24 bit data stored in 32 bit ints. */
- return SF_FORMAT_PCM_32 ;
- } ;
-
- return 0 ;
-} /* data_detect */
-
-static void
-vote_for_format (VOTE * vote, const unsigned char * data, int datalen)
-{
- int k ;
-
- memset (vote, 0, sizeof (VOTE)) ;
-
- datalen -= datalen % 4 ;
-
- for (k = 0 ; k < datalen ; k ++)
- { if ((k % 4) == 0)
- { if (data [k] == 0 && data [k + 1] != 0)
- vote->le_int_24_32 += 4 ;
-
- if (data [2] != 0 && data [3] == 0)
- vote->le_int_24_32 += 4 ;
-
- if (data [0] != 0 && data [3] > 0x43 && data [3] < 0x4B)
- vote->le_float += 4 ;
-
- if (data [3] != 0 && data [0] > 0x43 && data [0] < 0x4B)
- vote->be_float += 4 ;
- } ;
- } ;
-
- return ;
-} /* vote_for_format */
-