Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 2002-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| 3 | ** Copyright (C) 2007 Reuben Thomas |
| 4 | ** |
| 5 | ** This program is free software; you can redistribute it and/or modify |
| 6 | ** it under the terms of the GNU Lesser General Public License as published by |
| 7 | ** the Free Software Foundation; either version 2.1 of the License, or |
| 8 | ** (at your option) any later version. |
| 9 | ** |
| 10 | ** This program is distributed in the hope that it will be useful, |
| 11 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | ** GNU Lesser General Public License for more details. |
| 14 | ** |
| 15 | ** You should have received a copy of the GNU Lesser General Public License |
| 16 | ** along with this program; if not, write to the Free Software |
| 17 | ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | */ |
| 19 | |
| 20 | #include "sfconfig.h" |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include <fcntl.h> |
| 24 | #include <string.h> |
| 25 | #include <ctype.h> |
| 26 | |
| 27 | #include "sndfile.h" |
| 28 | #include "sfendian.h" |
| 29 | #include "common.h" |
| 30 | |
| 31 | /*------------------------------------------------------------------------------ |
| 32 | ** Macros to handle big/little endian issues, and other magic numbers. |
| 33 | */ |
| 34 | |
| 35 | #define ALAW_MARKER MAKE_MARKER ('A', 'L', 'a', 'w') |
| 36 | #define SOUN_MARKER MAKE_MARKER ('S', 'o', 'u', 'n') |
| 37 | #define DFIL_MARKER MAKE_MARKER ('d', 'F', 'i', 'l') |
| 38 | #define ESSN_MARKER MAKE_MARKER ('e', '*', '*', '\0') |
| 39 | #define PSION_VERSION ((unsigned short) 3856) |
| 40 | #define PSION_DATAOFFSET 0x20 |
| 41 | |
| 42 | /*------------------------------------------------------------------------------ |
| 43 | ** Private static functions. |
| 44 | */ |
| 45 | |
| 46 | static int wve_read_header (SF_PRIVATE *psf) ; |
| 47 | static int wve_write_header (SF_PRIVATE *psf, int calc_length) ; |
| 48 | static int wve_close (SF_PRIVATE *psf) ; |
| 49 | |
| 50 | /*------------------------------------------------------------------------------ |
| 51 | ** Public function. |
| 52 | */ |
| 53 | |
| 54 | int |
| 55 | wve_open (SF_PRIVATE *psf) |
| 56 | { int error = 0 ; |
| 57 | |
| 58 | if (psf->is_pipe) |
| 59 | return SFE_WVE_NO_PIPE ; |
| 60 | |
| 61 | if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| 62 | { if ((error = wve_read_header (psf))) |
| 63 | return error ; |
| 64 | } ; |
| 65 | |
| 66 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 67 | { if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_WVE) |
| 68 | return SFE_BAD_OPEN_FORMAT ; |
| 69 | |
| 70 | psf->endian = SF_ENDIAN_BIG ; |
| 71 | |
| 72 | if ((error = wve_write_header (psf, SF_FALSE))) |
| 73 | return error ; |
| 74 | |
| 75 | psf->write_header = wve_write_header ; |
| 76 | } ; |
| 77 | |
| 78 | psf->blockwidth = psf->bytewidth * psf->sf.channels ; |
| 79 | |
| 80 | psf->container_close = wve_close ; |
| 81 | |
| 82 | error = alaw_init (psf) ; |
| 83 | |
| 84 | return error ; |
| 85 | } /* wve_open */ |
| 86 | |
| 87 | /*------------------------------------------------------------------------------ |
| 88 | */ |
| 89 | |
| 90 | static int |
| 91 | wve_read_header (SF_PRIVATE *psf) |
| 92 | { int marker ; |
| 93 | unsigned short version, padding, repeats, trash ; |
| 94 | unsigned datalength ; |
| 95 | |
| 96 | /* Set position to start of file to begin reading header. */ |
| 97 | psf_binheader_readf (psf, "pm", 0, &marker) ; |
| 98 | if (marker != ALAW_MARKER) |
| 99 | { psf_log_printf (psf, "Could not find '%M'\n", ALAW_MARKER) ; |
| 100 | return SFE_WVE_NOT_WVE ; |
| 101 | } ; |
| 102 | |
| 103 | psf_binheader_readf (psf, "m", &marker) ; |
| 104 | if (marker != SOUN_MARKER) |
| 105 | { psf_log_printf (psf, "Could not find '%M'\n", SOUN_MARKER) ; |
| 106 | return SFE_WVE_NOT_WVE ; |
| 107 | } ; |
| 108 | |
| 109 | psf_binheader_readf (psf, "m", &marker) ; |
| 110 | if (marker != DFIL_MARKER) |
| 111 | { psf_log_printf (psf, "Could not find '%M'\n", DFIL_MARKER) ; |
| 112 | return SFE_WVE_NOT_WVE ; |
| 113 | } ; |
| 114 | |
| 115 | psf_binheader_readf (psf, "m", &marker) ; |
| 116 | if (marker != ESSN_MARKER) |
| 117 | { psf_log_printf (psf, "Could not find '%M'\n", ESSN_MARKER) ; |
| 118 | return SFE_WVE_NOT_WVE ; |
| 119 | } ; |
| 120 | |
| 121 | psf_binheader_readf (psf, "E2", &version) ; |
| 122 | |
| 123 | psf_log_printf (psf, "Psion Palmtop Alaw (.wve)\n" |
| 124 | " Sample Rate : 8000\n" |
| 125 | " Channels : 1\n" |
| 126 | " Encoding : A-law\n") ; |
| 127 | |
| 128 | if (version != PSION_VERSION) |
| 129 | psf_log_printf (psf, "Psion version %d should be %d\n", version, PSION_VERSION) ; |
| 130 | |
| 131 | psf_binheader_readf (psf, "E4", &datalength) ; |
| 132 | psf->dataoffset = PSION_DATAOFFSET ; |
| 133 | if (datalength != psf->filelength - psf->dataoffset) |
| 134 | { psf->datalength = psf->filelength - psf->dataoffset ; |
| 135 | psf_log_printf (psf, "Data length %d should be %D\n", datalength, psf->datalength) ; |
| 136 | } |
| 137 | else |
| 138 | psf->datalength = datalength ; |
| 139 | |
| 140 | psf_binheader_readf (psf, "E22222", &padding, &repeats, &trash, &trash, &trash) ; |
| 141 | |
| 142 | psf->sf.format = SF_FORMAT_WVE | SF_FORMAT_ALAW ; |
| 143 | psf->sf.samplerate = 8000 ; |
| 144 | psf->sf.frames = psf->datalength ; |
| 145 | psf->sf.channels = 1 ; |
| 146 | |
| 147 | return SFE_NO_ERROR ; |
| 148 | } /* wve_read_header */ |
| 149 | |
| 150 | /*------------------------------------------------------------------------------ |
| 151 | */ |
| 152 | |
| 153 | static int |
| 154 | wve_write_header (SF_PRIVATE *psf, int calc_length) |
| 155 | { sf_count_t current ; |
| 156 | unsigned datalen ; |
| 157 | |
| 158 | current = psf_ftell (psf) ; |
| 159 | |
| 160 | if (calc_length) |
| 161 | { psf->filelength = psf_get_filelen (psf) ; |
| 162 | |
| 163 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 164 | if (psf->dataend) |
| 165 | psf->datalength -= psf->filelength - psf->dataend ; |
| 166 | |
| 167 | psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ; |
| 168 | } ; |
| 169 | |
| 170 | /* Reset the current header length to zero. */ |
| 171 | psf->header [0] = 0 ; |
| 172 | psf->headindex = 0 ; |
| 173 | psf_fseek (psf, 0, SEEK_SET) ; |
| 174 | |
| 175 | /* Write header. */ |
| 176 | datalen = psf->datalength ; |
| 177 | psf_binheader_writef (psf, "Emmmm", ALAW_MARKER, SOUN_MARKER, DFIL_MARKER, ESSN_MARKER) ; |
| 178 | psf_binheader_writef (psf, "E2422222", PSION_VERSION, datalen, 0, 0, 0, 0, 0) ; |
| 179 | psf_fwrite (psf->header, psf->headindex, 1, psf) ; |
| 180 | |
| 181 | if (psf->sf.channels != 1) |
| 182 | return SFE_CHANNEL_COUNT ; |
| 183 | |
| 184 | if (psf->error) |
| 185 | return psf->error ; |
| 186 | |
| 187 | psf->dataoffset = psf->headindex ; |
| 188 | |
| 189 | if (current > 0) |
| 190 | psf_fseek (psf, current, SEEK_SET) ; |
| 191 | |
| 192 | return psf->error ; |
| 193 | } /* wve_write_header */ |
| 194 | |
| 195 | /*------------------------------------------------------------------------------ |
| 196 | */ |
| 197 | |
| 198 | static int |
| 199 | wve_close (SF_PRIVATE *psf) |
| 200 | { |
| 201 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 202 | { /* Now we know for certain the length of the file we can re-write |
| 203 | ** the header. |
| 204 | */ |
| 205 | wve_write_header (psf, SF_TRUE) ; |
| 206 | } ; |
| 207 | |
| 208 | return 0 ; |
| 209 | } /* wve_close */ |