| /* |
| ** Copyright (C) 2002-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| ** Copyright (C) 2007 Reuben Thomas |
| ** |
| ** 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 <fcntl.h> |
| #include <string.h> |
| #include <ctype.h> |
| |
| #include "sndfile.h" |
| #include "sfendian.h" |
| #include "common.h" |
| |
| /*------------------------------------------------------------------------------ |
| ** Macros to handle big/little endian issues, and other magic numbers. |
| */ |
| |
| #define ALAW_MARKER MAKE_MARKER ('A', 'L', 'a', 'w') |
| #define SOUN_MARKER MAKE_MARKER ('S', 'o', 'u', 'n') |
| #define DFIL_MARKER MAKE_MARKER ('d', 'F', 'i', 'l') |
| #define ESSN_MARKER MAKE_MARKER ('e', '*', '*', '\0') |
| #define PSION_VERSION ((unsigned short) 3856) |
| #define PSION_DATAOFFSET 0x20 |
| |
| /*------------------------------------------------------------------------------ |
| ** Private static functions. |
| */ |
| |
| static int wve_read_header (SF_PRIVATE *psf) ; |
| static int wve_write_header (SF_PRIVATE *psf, int calc_length) ; |
| static int wve_close (SF_PRIVATE *psf) ; |
| |
| /*------------------------------------------------------------------------------ |
| ** Public function. |
| */ |
| |
| int |
| wve_open (SF_PRIVATE *psf) |
| { int error = 0 ; |
| |
| if (psf->is_pipe) |
| return SFE_WVE_NO_PIPE ; |
| |
| if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| { if ((error = wve_read_header (psf))) |
| return error ; |
| } ; |
| |
| if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| { if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_WVE) |
| return SFE_BAD_OPEN_FORMAT ; |
| |
| psf->endian = SF_ENDIAN_BIG ; |
| |
| if ((error = wve_write_header (psf, SF_FALSE))) |
| return error ; |
| |
| psf->write_header = wve_write_header ; |
| } ; |
| |
| psf->blockwidth = psf->bytewidth * psf->sf.channels ; |
| |
| psf->container_close = wve_close ; |
| |
| error = alaw_init (psf) ; |
| |
| return error ; |
| } /* wve_open */ |
| |
| /*------------------------------------------------------------------------------ |
| */ |
| |
| static int |
| wve_read_header (SF_PRIVATE *psf) |
| { int marker ; |
| unsigned short version, padding, repeats, trash ; |
| unsigned datalength ; |
| |
| /* Set position to start of file to begin reading header. */ |
| psf_binheader_readf (psf, "pm", 0, &marker) ; |
| if (marker != ALAW_MARKER) |
| { psf_log_printf (psf, "Could not find '%M'\n", ALAW_MARKER) ; |
| return SFE_WVE_NOT_WVE ; |
| } ; |
| |
| psf_binheader_readf (psf, "m", &marker) ; |
| if (marker != SOUN_MARKER) |
| { psf_log_printf (psf, "Could not find '%M'\n", SOUN_MARKER) ; |
| return SFE_WVE_NOT_WVE ; |
| } ; |
| |
| psf_binheader_readf (psf, "m", &marker) ; |
| if (marker != DFIL_MARKER) |
| { psf_log_printf (psf, "Could not find '%M'\n", DFIL_MARKER) ; |
| return SFE_WVE_NOT_WVE ; |
| } ; |
| |
| psf_binheader_readf (psf, "m", &marker) ; |
| if (marker != ESSN_MARKER) |
| { psf_log_printf (psf, "Could not find '%M'\n", ESSN_MARKER) ; |
| return SFE_WVE_NOT_WVE ; |
| } ; |
| |
| psf_binheader_readf (psf, "E2", &version) ; |
| |
| psf_log_printf (psf, "Psion Palmtop Alaw (.wve)\n" |
| " Sample Rate : 8000\n" |
| " Channels : 1\n" |
| " Encoding : A-law\n") ; |
| |
| if (version != PSION_VERSION) |
| psf_log_printf (psf, "Psion version %d should be %d\n", version, PSION_VERSION) ; |
| |
| psf_binheader_readf (psf, "E4", &datalength) ; |
| psf->dataoffset = PSION_DATAOFFSET ; |
| if (datalength != psf->filelength - psf->dataoffset) |
| { psf->datalength = psf->filelength - psf->dataoffset ; |
| psf_log_printf (psf, "Data length %d should be %D\n", datalength, psf->datalength) ; |
| } |
| else |
| psf->datalength = datalength ; |
| |
| psf_binheader_readf (psf, "E22222", &padding, &repeats, &trash, &trash, &trash) ; |
| |
| psf->sf.format = SF_FORMAT_WVE | SF_FORMAT_ALAW ; |
| psf->sf.samplerate = 8000 ; |
| psf->sf.frames = psf->datalength ; |
| psf->sf.channels = 1 ; |
| |
| return SFE_NO_ERROR ; |
| } /* wve_read_header */ |
| |
| /*------------------------------------------------------------------------------ |
| */ |
| |
| static int |
| wve_write_header (SF_PRIVATE *psf, int calc_length) |
| { sf_count_t current ; |
| unsigned datalen ; |
| |
| current = psf_ftell (psf) ; |
| |
| if (calc_length) |
| { psf->filelength = psf_get_filelen (psf) ; |
| |
| psf->datalength = psf->filelength - psf->dataoffset ; |
| if (psf->dataend) |
| psf->datalength -= psf->filelength - psf->dataend ; |
| |
| psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ; |
| } ; |
| |
| /* Reset the current header length to zero. */ |
| psf->header [0] = 0 ; |
| psf->headindex = 0 ; |
| psf_fseek (psf, 0, SEEK_SET) ; |
| |
| /* Write header. */ |
| datalen = psf->datalength ; |
| psf_binheader_writef (psf, "Emmmm", ALAW_MARKER, SOUN_MARKER, DFIL_MARKER, ESSN_MARKER) ; |
| psf_binheader_writef (psf, "E2422222", PSION_VERSION, datalen, 0, 0, 0, 0, 0) ; |
| psf_fwrite (psf->header, psf->headindex, 1, psf) ; |
| |
| if (psf->sf.channels != 1) |
| return SFE_CHANNEL_COUNT ; |
| |
| if (psf->error) |
| return psf->error ; |
| |
| psf->dataoffset = psf->headindex ; |
| |
| if (current > 0) |
| psf_fseek (psf, current, SEEK_SET) ; |
| |
| return psf->error ; |
| } /* wve_write_header */ |
| |
| /*------------------------------------------------------------------------------ |
| */ |
| |
| static int |
| wve_close (SF_PRIVATE *psf) |
| { |
| if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| { /* Now we know for certain the length of the file we can re-write |
| ** the header. |
| */ |
| wve_write_header (psf, SF_TRUE) ; |
| } ; |
| |
| return 0 ; |
| } /* wve_close */ |