Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 2004-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| 3 | ** |
| 4 | ** This program is free software; you can redistribute it and/or modify |
| 5 | ** it under the terms of the GNU Lesser General Public License as published by |
| 6 | ** the Free Software Foundation; either version 2.1 of the License, or |
| 7 | ** (at your option) any later version. |
| 8 | ** |
| 9 | ** This program is distributed in the hope that it will be useful, |
| 10 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | ** GNU Lesser General Public License for more details. |
| 13 | ** |
| 14 | ** You should have received a copy of the GNU Lesser General Public License |
| 15 | ** along with this program; if not, write to the Free Software |
| 16 | ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #include "sfconfig.h" |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <string.h> |
| 23 | |
| 24 | #include "sndfile.h" |
| 25 | #include "sfendian.h" |
| 26 | #include "common.h" |
| 27 | |
| 28 | #define TWOBIT_MARKER (MAKE_MARKER ('2', 'B', 'I', 'T')) |
| 29 | #define AVR_HDR_SIZE 128 |
| 30 | |
| 31 | #define SFE_AVR_X 666 |
| 32 | |
| 33 | /* |
| 34 | ** From: hyc@hanauma.Jpl.Nasa.Gov (Howard Chu) |
| 35 | ** |
| 36 | ** A lot of PD software exists to play Mac .snd files on the ST. One other |
| 37 | ** format that seems pretty popular (used by a number of commercial packages) |
| 38 | ** is the AVR format (from Audio Visual Research). This format has a 128 byte |
| 39 | ** header that looks like this (its actually packed, but thats not portable): |
| 40 | */ |
| 41 | |
| 42 | typedef struct |
| 43 | { int marker ; /* 2BIT */ |
| 44 | char name [8] ; /* null-padded sample name */ |
| 45 | short mono ; /* 0 = mono, 0xffff = stereo */ |
| 46 | short rez ; /* 8 = 8 bit, 16 = 16 bit */ |
| 47 | short sign ; /* 0 = unsigned, 0xffff = signed */ |
| 48 | |
| 49 | short loop ; /* 0 = no loop, 0xffff = looping sample */ |
| 50 | short midi ; /* 0xffff = no MIDI note assigned, */ |
| 51 | /* 0xffXX = single key note assignment */ |
| 52 | /* 0xLLHH = key split, low/hi note */ |
| 53 | int srate ; /* sample frequency in hertz */ |
| 54 | int frames ; /* sample length in bytes or words (see rez) */ |
| 55 | int lbeg ; /* offset to start of loop in bytes or words. */ |
| 56 | /* set to zero if unused */ |
| 57 | int lend ; /* offset to end of loop in bytes or words. */ |
| 58 | /* set to sample length if unused */ |
| 59 | short res1 ; /* Reserved, MIDI keyboard split */ |
| 60 | short res2 ; /* Reserved, sample compression */ |
| 61 | short res3 ; /* Reserved */ |
| 62 | char ext [20] ; /* Additional filename space, used if (name[7] != 0) */ |
| 63 | char user [64] ; /* User defined. Typically ASCII message */ |
| 64 | } AVR_HEADER ; |
| 65 | |
| 66 | /*------------------------------------------------------------------------------ |
| 67 | ** Private static functions. |
| 68 | */ |
| 69 | |
| 70 | static int avr_close (SF_PRIVATE *psf) ; |
| 71 | |
| 72 | static int avr_read_header (SF_PRIVATE *psf) ; |
| 73 | static int avr_write_header (SF_PRIVATE *psf, int calc_length) ; |
| 74 | |
| 75 | /*------------------------------------------------------------------------------ |
| 76 | ** Public function. |
| 77 | */ |
| 78 | |
| 79 | int |
| 80 | avr_open (SF_PRIVATE *psf) |
| 81 | { int error = 0 ; |
| 82 | |
| 83 | if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| 84 | { if ((error = avr_read_header (psf))) |
| 85 | return error ; |
| 86 | } ; |
| 87 | |
| 88 | if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_AVR) |
| 89 | return SFE_BAD_OPEN_FORMAT ; |
| 90 | |
| 91 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 92 | { psf->endian = SF_ENDIAN (psf->sf.format) ; |
| 93 | psf->endian = SF_ENDIAN_BIG ; |
| 94 | |
| 95 | if (avr_write_header (psf, SF_FALSE)) |
| 96 | return psf->error ; |
| 97 | |
| 98 | psf->write_header = avr_write_header ; |
| 99 | } ; |
| 100 | |
| 101 | psf->container_close = avr_close ; |
| 102 | |
| 103 | psf->blockwidth = psf->bytewidth * psf->sf.channels ; |
| 104 | |
| 105 | error = pcm_init (psf) ; |
| 106 | |
| 107 | return error ; |
| 108 | } /* avr_open */ |
| 109 | |
| 110 | static int |
| 111 | avr_read_header (SF_PRIVATE *psf) |
| 112 | { AVR_HEADER hdr ; |
| 113 | |
| 114 | memset (&hdr, 0, sizeof (hdr)) ; |
| 115 | |
| 116 | psf_binheader_readf (psf, "pmb", 0, &hdr.marker, &hdr.name, sizeof (hdr.name)) ; |
| 117 | psf_log_printf (psf, "%M\n", hdr.marker) ; |
| 118 | |
| 119 | if (hdr.marker != TWOBIT_MARKER) |
| 120 | return SFE_AVR_X ; |
| 121 | |
| 122 | psf_log_printf (psf, " Name : %s\n", hdr.name) ; |
| 123 | |
| 124 | psf_binheader_readf (psf, "E22222", &hdr.mono, &hdr.rez, &hdr.sign, &hdr.loop, &hdr.midi) ; |
| 125 | |
| 126 | psf->sf.channels = (hdr.mono & 1) + 1 ; |
| 127 | |
| 128 | psf_log_printf (psf, " Channels : %d\n Bit width : %d\n Signed : %s\n", |
| 129 | (hdr.mono & 1) + 1, hdr.rez, hdr.sign ? "yes" : "no") ; |
| 130 | |
| 131 | switch ((hdr.rez << 16) + (hdr.sign & 1)) |
| 132 | { case ((8 << 16) + 0) : |
| 133 | psf->sf.format = SF_FORMAT_AVR | SF_FORMAT_PCM_U8 ; |
| 134 | psf->bytewidth = 1 ; |
| 135 | break ; |
| 136 | |
| 137 | case ((8 << 16) + 1) : |
| 138 | psf->sf.format = SF_FORMAT_AVR | SF_FORMAT_PCM_S8 ; |
| 139 | psf->bytewidth = 1 ; |
| 140 | break ; |
| 141 | |
| 142 | case ((16 << 16) + 1) : |
| 143 | psf->sf.format = SF_FORMAT_AVR | SF_FORMAT_PCM_16 ; |
| 144 | psf->bytewidth = 2 ; |
| 145 | break ; |
| 146 | |
| 147 | default : |
| 148 | psf_log_printf (psf, "Error : bad rez/sign combination.\n") ; |
| 149 | return SFE_AVR_X ; |
| 150 | } ; |
| 151 | |
| 152 | psf_binheader_readf (psf, "E4444", &hdr.srate, &hdr.frames, &hdr.lbeg, &hdr.lend) ; |
| 153 | |
| 154 | psf->sf.frames = hdr.frames ; |
| 155 | psf->sf.samplerate = hdr.srate ; |
| 156 | |
| 157 | psf_log_printf (psf, " Frames : %D\n", psf->sf.frames) ; |
| 158 | psf_log_printf (psf, " Sample rate : %d\n", psf->sf.samplerate) ; |
| 159 | |
| 160 | psf_binheader_readf (psf, "E222", &hdr.res1, &hdr.res2, &hdr.res3) ; |
| 161 | psf_binheader_readf (psf, "bb", hdr.ext, sizeof (hdr.ext), hdr.user, sizeof (hdr.user)) ; |
| 162 | |
| 163 | psf_log_printf (psf, " Ext : %s\n User : %s\n", hdr.ext, hdr.user) ; |
| 164 | |
| 165 | psf->endian = SF_ENDIAN_BIG ; |
| 166 | |
| 167 | psf->dataoffset = AVR_HDR_SIZE ; |
| 168 | psf->datalength = hdr.frames * (hdr.rez / 8) ; |
| 169 | |
| 170 | if (psf->fileoffset > 0) |
| 171 | psf->filelength = AVR_HDR_SIZE + psf->datalength ; |
| 172 | |
| 173 | if (psf_ftell (psf) != psf->dataoffset) |
| 174 | psf_binheader_readf (psf, "j", psf->dataoffset - psf_ftell (psf)) ; |
| 175 | |
| 176 | psf->blockwidth = psf->sf.channels * psf->bytewidth ; |
| 177 | |
| 178 | if (psf->sf.frames == 0 && psf->blockwidth) |
| 179 | psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ; |
| 180 | |
| 181 | return 0 ; |
| 182 | } /* avr_read_header */ |
| 183 | |
| 184 | static int |
| 185 | avr_write_header (SF_PRIVATE *psf, int calc_length) |
| 186 | { sf_count_t current ; |
| 187 | int sign ; |
| 188 | |
| 189 | if (psf->pipeoffset > 0) |
| 190 | return 0 ; |
| 191 | |
| 192 | current = psf_ftell (psf) ; |
| 193 | |
| 194 | if (calc_length) |
| 195 | { psf->filelength = psf_get_filelen (psf) ; |
| 196 | |
| 197 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 198 | if (psf->dataend) |
| 199 | psf->datalength -= psf->filelength - psf->dataend ; |
| 200 | |
| 201 | psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ; |
| 202 | } ; |
| 203 | |
| 204 | /* Reset the current header length to zero. */ |
| 205 | psf->header [0] = 0 ; |
| 206 | psf->headindex = 0 ; |
| 207 | |
| 208 | /* |
| 209 | ** Only attempt to seek if we are not writng to a pipe. If we are |
| 210 | ** writing to a pipe we shouldn't be here anyway. |
| 211 | */ |
| 212 | if (psf->is_pipe == SF_FALSE) |
| 213 | psf_fseek (psf, 0, SEEK_SET) ; |
| 214 | |
| 215 | psf_binheader_writef (psf, "Emz22", TWOBIT_MARKER, make_size_t (8), |
| 216 | psf->sf.channels == 2 ? 0xFFFF : 0, psf->bytewidth * 8) ; |
| 217 | |
| 218 | sign = ((SF_CODEC (psf->sf.format)) == SF_FORMAT_PCM_U8) ? 0 : 0xFFFF ; |
| 219 | |
| 220 | psf_binheader_writef (psf, "E222", sign, 0, 0xFFFF) ; |
| 221 | psf_binheader_writef (psf, "E4444", psf->sf.samplerate, psf->sf.frames, 0, 0) ; |
| 222 | |
| 223 | psf_binheader_writef (psf, "E222zz", 0, 0, 0, make_size_t (20), make_size_t (64)) ; |
| 224 | |
| 225 | /* Header construction complete so write it out. */ |
| 226 | psf_fwrite (psf->header, psf->headindex, 1, psf) ; |
| 227 | |
| 228 | if (psf->error) |
| 229 | return psf->error ; |
| 230 | |
| 231 | psf->dataoffset = psf->headindex ; |
| 232 | |
| 233 | if (current > 0) |
| 234 | psf_fseek (psf, current, SEEK_SET) ; |
| 235 | |
| 236 | return psf->error ; |
| 237 | } /* avr_write_header */ |
| 238 | |
| 239 | static int |
| 240 | avr_close (SF_PRIVATE *psf) |
| 241 | { |
| 242 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 243 | avr_write_header (psf, SF_TRUE) ; |
| 244 | |
| 245 | return 0 ; |
| 246 | } /* avr_close */ |
| 247 | |