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https://gitlab.linphone.org/BC/public/linphone-iphone.git
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139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/*
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mediastreamer2 library - modular sound and video processing and streaming
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Copyright (C) 2006 Simon MORLAT (simon.morlat@linphone.org)
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef waveheader_h
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#define waveheader_h
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#ifdef _WIN32
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# include <io.h>
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# ifndef R_OK
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# define R_OK 0x2
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# endif
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# ifndef W_OK
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# define W_OK 0x6
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# endif
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# ifndef F_OK
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# define F_OK 0x0
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# endif
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# ifndef S_IRUSR
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# define S_IRUSR S_IREAD
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# endif
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# ifndef S_IWUSR
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# define S_IWUSR S_IWRITE
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# endif
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# define open _open
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# define read _read
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# define write _write
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# define close _close
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# define access _access
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# define lseek _lseek
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#else /*_WIN32*/
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# ifndef O_BINARY
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# define O_BINARY 0
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# endif
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#endif /*!_WIN32*/
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#ifdef swap16
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#else
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/* all integer in wav header must be read in least endian order */
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static MS2_INLINE uint16_t swap16(uint16_t a)
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{
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return ((a & 0xFF) << 8) | ((a & 0xFF00) >> 8);
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}
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#endif
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#ifdef swap32
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#else
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static MS2_INLINE uint32_t swap32(uint32_t a)
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{
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return ((a & 0xFF) << 24) | ((a & 0xFF00) << 8) |
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((a & 0xFF0000) >> 8) | ((a & 0xFF000000) >> 24);
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}
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#endif
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#ifdef WORDS_BIGENDIAN
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#define le_uint32(a) (swap32((a)))
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#define le_uint16(a) (swap16((a)))
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#define le_int16(a) ( (int16_t) swap16((uint16_t)((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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uint32_t 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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uint32_t len ; /* length of FORMAT chunk (always 0x10) */
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uint16_t type; /* codec type*/
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uint16_t channel ; /* Channel numbers (0x01 = mono, 0x02 = stereo) */
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uint32_t rate ; /* Sample rate (binary, in Hz) */
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uint32_t bps ; /* Average Bytes Per Second */
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uint16_t blockalign ; /*number of bytes per sample */
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uint16_t 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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uint32_t 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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#ifndef _WIN32
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#define WAVE_FORMAT_PCM 0x0001
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#define WAVE_FORMAT_IEEE_FLOAT 0x0003
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#define WAVE_FORMAT_ALAW 0x0006
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#define WAVE_FORMAT_MULAW 0x0007
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#define WAVE_FORMAT_EXTENSIBLE 0xFFFE
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#endif
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#define wave_header_get_format_type(header) le_uint16((header)->format_chunk.type)
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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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#define wave_header_get_bpsmpl(header) \
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le_uint16((header)->format_chunk.blockalign)
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int ms_read_wav_header_from_fd(wave_header_t *header,int fd);
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#endif
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