Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 2008-2011 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 <fcntl.h> |
| 23 | #include <string.h> |
| 24 | #include <ctype.h> |
| 25 | |
| 26 | #include "sndfile.h" |
| 27 | #include "sfendian.h" |
| 28 | #include "common.h" |
| 29 | |
| 30 | /* |
| 31 | ** Info from Olivier Tristan <o.tristan@ultimatesoundbank.com> |
| 32 | ** |
| 33 | ** HEADER |
| 34 | ** 2 magic bytes: 1 and 4. |
| 35 | ** 17 char for the name of the sample. |
| 36 | ** 3 bytes: level, tune and channels (0 for channels is mono while 1 is stereo) |
| 37 | ** 4 uint32: sampleStart, loopEnd, sampleFrames and loopLength |
| 38 | ** 1 byte: loopMode (0 no loop, 1 forward looping) |
| 39 | ** 1 byte: number of beat in loop |
| 40 | ** 1 uint16: sampleRate |
| 41 | ** |
| 42 | ** DATA |
| 43 | ** Data are always non compressed 16 bits interleaved |
| 44 | */ |
| 45 | |
| 46 | #define HEADER_LENGTH 42 /* Sum of above data fields. */ |
| 47 | #define HEADER_NAME_LEN 17 /* Length of name string. */ |
| 48 | |
| 49 | #define SFE_MPC_NO_MARKER 666 |
| 50 | |
| 51 | /*------------------------------------------------------------------------------ |
| 52 | ** Private static functions. |
| 53 | */ |
| 54 | |
| 55 | static int mpc2k_close (SF_PRIVATE *psf) ; |
| 56 | |
| 57 | static int mpc2k_write_header (SF_PRIVATE *psf, int calc_length) ; |
| 58 | static int mpc2k_read_header (SF_PRIVATE *psf) ; |
| 59 | |
| 60 | /*------------------------------------------------------------------------------ |
| 61 | ** Public function. |
| 62 | */ |
| 63 | |
| 64 | int |
| 65 | mpc2k_open (SF_PRIVATE *psf) |
| 66 | { int error = 0 ; |
| 67 | |
| 68 | if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| 69 | { if ((error = mpc2k_read_header (psf))) |
| 70 | return error ; |
| 71 | } ; |
| 72 | |
| 73 | if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_MPC2K) |
| 74 | return SFE_BAD_OPEN_FORMAT ; |
| 75 | |
| 76 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 77 | { if (mpc2k_write_header (psf, SF_FALSE)) |
| 78 | return psf->error ; |
| 79 | |
| 80 | psf->write_header = mpc2k_write_header ; |
| 81 | } ; |
| 82 | |
| 83 | psf->container_close = mpc2k_close ; |
| 84 | |
| 85 | psf->blockwidth = psf->bytewidth * psf->sf.channels ; |
| 86 | |
| 87 | error = pcm_init (psf) ; |
| 88 | |
| 89 | return error ; |
| 90 | } /* mpc2k_open */ |
| 91 | |
| 92 | /*------------------------------------------------------------------------------ |
| 93 | */ |
| 94 | |
| 95 | static int |
| 96 | mpc2k_close (SF_PRIVATE *psf) |
| 97 | { |
| 98 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 99 | mpc2k_write_header (psf, SF_TRUE) ; |
| 100 | |
| 101 | return 0 ; |
| 102 | } /* mpc2k_close */ |
| 103 | |
| 104 | static int |
| 105 | mpc2k_write_header (SF_PRIVATE *psf, int calc_length) |
| 106 | { char sample_name [HEADER_NAME_LEN + 1] ; |
| 107 | sf_count_t current ; |
| 108 | |
| 109 | if (psf->pipeoffset > 0) |
| 110 | return 0 ; |
| 111 | |
| 112 | current = psf_ftell (psf) ; |
| 113 | |
| 114 | if (calc_length) |
| 115 | { psf->filelength = psf_get_filelen (psf) ; |
| 116 | |
| 117 | psf->dataoffset = HEADER_LENGTH ; |
| 118 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 119 | |
| 120 | psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ; |
| 121 | } ; |
| 122 | |
| 123 | /* Reset the current header length to zero. */ |
| 124 | psf->header [0] = 0 ; |
| 125 | psf->headindex = 0 ; |
| 126 | |
| 127 | /* |
| 128 | ** Only attempt to seek if we are not writng to a pipe. If we are |
| 129 | ** writing to a pipe we shouldn't be here anyway. |
| 130 | */ |
| 131 | if (psf->is_pipe == SF_FALSE) |
| 132 | psf_fseek (psf, 0, SEEK_SET) ; |
| 133 | |
| 134 | snprintf (sample_name, sizeof (sample_name), "%s ", psf->file.name.c) ; |
| 135 | |
| 136 | psf_binheader_writef (psf, "e11b", 1, 4, sample_name, make_size_t (HEADER_NAME_LEN)) ; |
| 137 | psf_binheader_writef (psf, "e111", 100, 0, (psf->sf.channels - 1) & 1) ; |
| 138 | psf_binheader_writef (psf, "et4888", 0, psf->sf.frames, psf->sf.frames, psf->sf.frames) ; |
| 139 | psf_binheader_writef (psf, "e112", 0, 1, (uint16_t) psf->sf.samplerate) ; |
| 140 | |
| 141 | /* Always 16 bit little endian data. */ |
| 142 | psf->bytewidth = 2 ; |
| 143 | psf->endian = SF_ENDIAN_LITTLE ; |
| 144 | |
| 145 | psf_fwrite (psf->header, psf->headindex, 1, psf) ; |
| 146 | |
| 147 | if (psf->error) |
| 148 | return psf->error ; |
| 149 | |
| 150 | psf->dataoffset = psf->headindex ; |
| 151 | |
| 152 | if (current > 0) |
| 153 | psf_fseek (psf, current, SEEK_SET) ; |
| 154 | |
| 155 | return psf->error ; |
| 156 | } /* mpc2k_write_header */ |
| 157 | |
| 158 | static int |
| 159 | mpc2k_read_header (SF_PRIVATE *psf) |
| 160 | { char sample_name [HEADER_NAME_LEN + 1] ; |
| 161 | unsigned char bytes [4] ; |
| 162 | uint32_t sample_start, loop_end, sample_frames, loop_length ; |
| 163 | uint16_t sample_rate ; |
| 164 | |
| 165 | psf_binheader_readf (psf, "pebb", 0, bytes, 2, sample_name, make_size_t (HEADER_NAME_LEN)) ; |
| 166 | |
| 167 | if (bytes [0] != 1 || bytes [1] != 4) |
| 168 | return SFE_MPC_NO_MARKER ; |
| 169 | |
| 170 | sample_name [HEADER_NAME_LEN] = 0 ; |
| 171 | |
| 172 | psf_log_printf (psf, "MPC2000\n Name : %s\n", sample_name) ; |
| 173 | |
| 174 | psf_binheader_readf (psf, "eb4444", bytes, 3, &sample_start, &loop_end, &sample_frames, &loop_length) ; |
| 175 | |
| 176 | psf->sf.channels = bytes [2] ? 2 : 1 ; |
| 177 | |
| 178 | psf_log_printf (psf, " Level : %d\n Tune : %d\n Stereo : %s\n", bytes [0], bytes [1], bytes [2] ? "Yes" : "No") ; |
| 179 | |
| 180 | psf_log_printf (psf, " Sample start : %d\n Loop end : %d\n Frames : %d\n Length : %d\n", sample_start, loop_end, sample_frames, loop_length) ; |
| 181 | |
| 182 | psf_binheader_readf (psf, "eb2", bytes, 2, &sample_rate) ; |
| 183 | |
| 184 | psf_log_printf (psf, " Loop mode : %s\n Beats : %d\n Sample rate : %d\nEnd\n", bytes [0] ? "None" : "Fwd", bytes [1], sample_rate) ; |
| 185 | |
| 186 | psf->sf.samplerate = sample_rate ; |
| 187 | |
| 188 | psf->sf.format = SF_FORMAT_MPC2K | SF_FORMAT_PCM_16 ; |
| 189 | |
| 190 | psf->dataoffset = psf_ftell (psf) ; |
| 191 | |
| 192 | /* Always 16 bit little endian data. */ |
| 193 | psf->bytewidth = 2 ; |
| 194 | psf->endian = SF_ENDIAN_LITTLE ; |
| 195 | |
| 196 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 197 | psf->blockwidth = psf->sf.channels * psf->bytewidth ; |
| 198 | psf->sf.frames = psf->datalength / psf->blockwidth ; |
| 199 | |
| 200 | psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ; |
| 201 | |
| 202 | return 0 ; |
| 203 | } /* mpc2k_read_header */ |
| 204 | |