2 ** Copyright (C) 2008-2009 Erik de Castro Lopo <erikd@mega-nerd.com>
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.
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.
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.
31 ** Info from Olivier Tristan <o.tristan@ultimatesoundbank.com>
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
43 ** Data are always non compressed 16 bits interleaved
46 #define HEADER_LENGTH 42 /* Sum of above data fields. */
47 #define HEADER_NAME_LEN 17 /* Length of name string. */
49 #define SFE_MPC_NO_MARKER 666
51 /*------------------------------------------------------------------------------
52 ** Private static functions.
55 static int mpc2k_close (SF_PRIVATE *psf) ;
57 static int mpc2k_write_header (SF_PRIVATE *psf, int calc_length) ;
58 static int mpc2k_read_header (SF_PRIVATE *psf) ;
60 /*------------------------------------------------------------------------------
65 mpc2k_open (SF_PRIVATE *psf)
69 if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
70 { if ((error = mpc2k_read_header (psf)))
74 if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_MPC2K)
75 return SFE_BAD_OPEN_FORMAT ;
77 subformat = SF_CODEC (psf->sf.format) ;
79 if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
80 { if (mpc2k_write_header (psf, SF_FALSE))
83 psf->write_header = mpc2k_write_header ;
86 psf->container_close = mpc2k_close ;
88 psf->blockwidth = psf->bytewidth * psf->sf.channels ;
90 error = pcm_init (psf) ;
95 /*------------------------------------------------------------------------------
99 mpc2k_close (SF_PRIVATE *psf)
101 if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
102 mpc2k_write_header (psf, SF_TRUE) ;
108 mpc2k_write_header (SF_PRIVATE *psf, int calc_length)
109 { char sample_name [HEADER_NAME_LEN + 1] ;
112 if (psf->pipeoffset > 0)
115 current = psf_ftell (psf) ;
118 { psf->filelength = psf_get_filelen (psf) ;
120 psf->dataoffset = HEADER_LENGTH ;
121 psf->datalength = psf->filelength - psf->dataoffset ;
123 psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
126 /* Reset the current header length to zero. */
127 psf->header [0] = 0 ;
131 ** Only attempt to seek if we are not writng to a pipe. If we are
132 ** writing to a pipe we shouldn't be here anyway.
134 if (psf->is_pipe == SF_FALSE)
135 psf_fseek (psf, 0, SEEK_SET) ;
137 snprintf (sample_name, sizeof (sample_name), "%s ", psf->file.name.c) ;
139 psf_binheader_writef (psf, "e11b", 1, 4, sample_name, make_size_t (HEADER_NAME_LEN)) ;
140 psf_binheader_writef (psf, "e111", 100, 0, (psf->sf.channels - 1) & 1) ;
141 psf_binheader_writef (psf, "et4888", 0, psf->sf.frames, psf->sf.frames, psf->sf.frames) ;
142 psf_binheader_writef (psf, "e112", 0, 1, (uint16_t) psf->sf.samplerate) ;
144 /* Always 16 bit little endian data. */
146 psf->endian = SF_ENDIAN_LITTLE ;
148 psf_fwrite (psf->header, psf->headindex, 1, psf) ;
153 psf->dataoffset = psf->headindex ;
156 psf_fseek (psf, current, SEEK_SET) ;
159 } /* mpc2k_write_header */
162 mpc2k_read_header (SF_PRIVATE *psf)
163 { char sample_name [HEADER_NAME_LEN + 1] ;
164 unsigned char bytes [4] ;
165 uint32_t sample_start, loop_end, sample_frames, loop_length ;
166 uint16_t sample_rate ;
168 psf_binheader_readf (psf, "pebb", 0, bytes, 2, sample_name, make_size_t (HEADER_NAME_LEN)) ;
170 if (bytes [0] != 1 || bytes [1] != 4)
171 return SFE_MPC_NO_MARKER ;
173 sample_name [HEADER_NAME_LEN] = 0 ;
175 psf_log_printf (psf, "MPC2000\n Name : %s\n", sample_name) ;
177 psf_binheader_readf (psf, "eb4444", bytes, 3, &sample_start, &loop_end, &sample_frames, &loop_length) ;
179 psf->sf.channels = bytes [2] ? 2 : 1 ;
181 psf_log_printf (psf, " Level : %d\n Tune : %d\n Stereo : %s\n", bytes [0], bytes [1], bytes [2] ? "Yes" : "No") ;
183 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) ;
185 psf_binheader_readf (psf, "eb2", bytes, 2, &sample_rate) ;
187 psf_log_printf (psf, " Loop mode : %s\n Beats : %d\n Sample rate : %d\nEnd\n", bytes [0] ? "None" : "Fwd", bytes [1], sample_rate) ;
189 psf->sf.samplerate = sample_rate ;
191 psf->sf.format = SF_FORMAT_MPC2K | SF_FORMAT_PCM_16 ;
193 psf->dataoffset = psf_ftell (psf) ;
195 /* Always 16 bit little endian data. */
197 psf->endian = SF_ENDIAN_LITTLE ;
199 psf->datalength = psf->filelength - psf->dataoffset ;
200 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
201 psf->sf.frames = psf->datalength / psf->blockwidth ;
203 psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
206 } /* mpc2k_read_header */