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112 lines
3.0 KiB
112 lines
3.0 KiB
15 years ago
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/*
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linphone
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Copyright (C) 2000 Simon MORLAT (simon.morlat@free.fr)
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* the following code was taken from a free software utility that I don't remember the name. */
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/* sorry */
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#include <ms.h>
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#ifndef waveheader_h
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#define waveheader_h
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typedef struct uint16scheme
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{
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unsigned char lo_byte;
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unsigned char hi_byte;
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} uint16scheme_t;
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typedef struct uint32scheme
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{
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guint16 lo_int;
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guint16 hi_int;
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} uint32scheme_t;
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/* all integer in wav header must be read in least endian order */
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inline guint16 _readuint16(guint16 a)
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{
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guint16 res;
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uint16scheme_t *tmp1=(uint16scheme_t*)&a;
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((uint16scheme_t *)(&res))->lo_byte=tmp1->hi_byte;
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((uint16scheme_t *)(&res))->hi_byte=tmp1->lo_byte;
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return res;
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}
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inline guint32 _readuint32(guint32 a)
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{
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guint32 res;
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uint32scheme_t *tmp1=(uint32scheme_t*)&a;
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((uint32scheme_t *)(&res))->lo_int=_readuint16(tmp1->hi_int);
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((uint32scheme_t *)(&res))->hi_int=_readuint16(tmp1->lo_int);
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return res;
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}
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#ifdef WORDS_BIGENDIAN
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#define le_uint32(a) (_readuint32((a)))
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#define le_uint16(a) (_readuint16((a)))
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#define le_int16(a) ( (gint16) _readuint16((guint16)((a))) )
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#else
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#define le_uint32(a) (a)
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#define le_uint16(a) (a)
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#define le_int16(a) (a)
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#endif
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typedef struct _riff_t {
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char riff[4] ; /* "RIFF" (ASCII characters) */
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guint32 len ; /* Length of package (binary, little endian) */
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char wave[4] ; /* "WAVE" (ASCII characters) */
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} riff_t;
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/* The FORMAT chunk */
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typedef struct _format_t {
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char fmt[4] ; /* "fmt_" (ASCII characters) */
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guint32 len ; /* length of FORMAT chunk (always 0x10) */
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guint16 que ; /* Always 0x01 */
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guint16 channel ; /* Channel numbers (0x01 = mono, 0x02 = stereo) */
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guint32 rate ; /* Sample rate (binary, in Hz) */
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guint32 bps ; /* Bytes Per Second */
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guint16 bpsmpl ; /* bytes per sample: 1 = 8 bit Mono,
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2 = 8 bit Stereo/16 bit Mono,
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4 = 16 bit Stereo */
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guint16 bitpspl ; /* bits per sample */
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} format_t;
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/* The DATA chunk */
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typedef struct _data_t {
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char data[4] ; /* "data" (ASCII characters) */
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int len ; /* length of data */
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} data_t;
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typedef struct _wave_header_t
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{
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riff_t riff_chunk;
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format_t format_chunk;
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data_t data_chunk;
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} wave_header_t;
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#define wave_header_get_rate(header) le_uint32((header)->format_chunk.rate)
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#define wave_header_get_channel(header) le_uint16((header)->format_chunk.channel)
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#endif
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