1/* 2** Copyright (C) 2008-2017 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/*------------------------------------------------------------------------------ 50** Private static functions. 51*/ 52 53static int mpc2k_close (SF_PRIVATE *psf) ; 54 55static int mpc2k_write_header (SF_PRIVATE *psf, int calc_length) ; 56static int mpc2k_read_header (SF_PRIVATE *psf) ; 57 58/*------------------------------------------------------------------------------ 59** Public function. 60*/ 61 62int 63mpc2k_open (SF_PRIVATE *psf) 64{ int error = 0 ; 65 66 if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) 67 { if ((error = mpc2k_read_header (psf))) 68 return error ; 69 } ; 70 71 if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_MPC2K) 72 return SFE_BAD_OPEN_FORMAT ; 73 74 if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) 75 { if (mpc2k_write_header (psf, SF_FALSE)) 76 return psf->error ; 77 78 psf->write_header = mpc2k_write_header ; 79 } ; 80 81 psf->container_close = mpc2k_close ; 82 83 psf->blockwidth = psf->bytewidth * psf->sf.channels ; 84 85 error = pcm_init (psf) ; 86 87 return error ; 88} /* mpc2k_open */ 89 90/*------------------------------------------------------------------------------ 91*/ 92 93static int 94mpc2k_close (SF_PRIVATE *psf) 95{ 96 if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) 97 mpc2k_write_header (psf, SF_TRUE) ; 98 99 return 0 ; 100} /* mpc2k_close */ 101 102static int 103mpc2k_write_header (SF_PRIVATE *psf, int calc_length) 104{ char sample_name [HEADER_NAME_LEN + 1] ; 105 sf_count_t current ; 106 107 if (psf->pipeoffset > 0) 108 return 0 ; 109 110 current = psf_ftell (psf) ; 111 112 if (calc_length) 113 { psf->filelength = psf_get_filelen (psf) ; 114 115 psf->dataoffset = HEADER_LENGTH ; 116 psf->datalength = psf->filelength - psf->dataoffset ; 117 118 psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ; 119 } ; 120 121 /* Reset the current header length to zero. */ 122 psf->header.ptr [0] = 0 ; 123 psf->header.indx = 0 ; 124 125 /* 126 ** Only attempt to seek if we are not writng to a pipe. If we are 127 ** writing to a pipe we shouldn't be here anyway. 128 */ 129 if (psf->is_pipe == SF_FALSE) 130 psf_fseek (psf, 0, SEEK_SET) ; 131 132 snprintf (sample_name, sizeof (sample_name), "%-*.*s", HEADER_NAME_LEN, HEADER_NAME_LEN, psf->file.name) ; 133 134 psf_binheader_writef (psf, "e11b", BHW1 (1), BHW1 (4), BHWv (sample_name), BHWz (HEADER_NAME_LEN)) ; 135 psf_binheader_writef (psf, "e111", BHW1 (100), BHW1 (0), BHW1 ((psf->sf.channels - 1) & 1)) ; 136 psf_binheader_writef (psf, "et4888", BHW4 (0), BHW8 (psf->sf.frames), BHW8 (psf->sf.frames), BHW8 (psf->sf.frames)) ; 137 psf_binheader_writef (psf, "e112", BHW1 (0), BHW1 (1), BHW2 ((uint16_t) psf->sf.samplerate)) ; 138 139 /* Always 16 bit little endian data. */ 140 psf->bytewidth = 2 ; 141 psf->endian = SF_ENDIAN_LITTLE ; 142 143 psf_fwrite (psf->header.ptr, psf->header.indx, 1, psf) ; 144 145 if (psf->error) 146 return psf->error ; 147 148 psf->dataoffset = psf->header.indx ; 149 150 if (current > 0) 151 psf_fseek (psf, current, SEEK_SET) ; 152 153 return psf->error ; 154} /* mpc2k_write_header */ 155 156static int 157mpc2k_read_header (SF_PRIVATE *psf) 158{ char sample_name [HEADER_NAME_LEN + 1] ; 159 unsigned char bytes [4] ; 160 uint32_t sample_start, loop_end, sample_frames, loop_length ; 161 uint16_t sample_rate ; 162 163 psf_binheader_readf (psf, "pebb", 0, bytes, 2, sample_name, make_size_t (HEADER_NAME_LEN)) ; 164 165 if (bytes [0] != 1 || bytes [1] != 4) 166 return SFE_MPC_NO_MARKER ; 167 168 sample_name [HEADER_NAME_LEN] = 0 ; 169 170 psf_log_printf (psf, "MPC2000\n Name : %s\n", sample_name) ; 171 172 psf_binheader_readf (psf, "eb4444", bytes, 3, &sample_start, &loop_end, &sample_frames, &loop_length) ; 173 174 psf->sf.channels = bytes [2] ? 2 : 1 ; 175 176 psf_log_printf (psf, " Level : %d\n Tune : %d\n Stereo : %s\n", bytes [0], bytes [1], bytes [2] ? "Yes" : "No") ; 177 178 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) ; 179 180 psf_binheader_readf (psf, "eb2", bytes, 2, &sample_rate) ; 181 182 psf_log_printf (psf, " Loop mode : %s\n Beats : %d\n Sample rate : %d\nEnd\n", bytes [0] ? "None" : "Fwd", bytes [1], sample_rate) ; 183 184 psf->sf.samplerate = sample_rate ; 185 186 psf->sf.format = SF_FORMAT_MPC2K | SF_FORMAT_PCM_16 ; 187 188 psf->dataoffset = psf_ftell (psf) ; 189 190 /* Always 16 bit little endian data. */ 191 psf->bytewidth = 2 ; 192 psf->endian = SF_ENDIAN_LITTLE ; 193 194 psf->datalength = psf->filelength - psf->dataoffset ; 195 psf->blockwidth = psf->sf.channels * psf->bytewidth ; 196 psf->sf.frames = psf->datalength / psf->blockwidth ; 197 198 psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ; 199 200 return 0 ; 201} /* mpc2k_read_header */ 202 203