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/*
** Copyright (C) 2008-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU Lesser General Public License as published by
** the Free Software Foundation; either version 2.1 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "sfconfig.h"
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <ctype.h>
#include "sndfile.h"
#include "sfendian.h"
#include "common.h"
/*
** Info from Olivier Tristan <o.tristan@ultimatesoundbank.com>
**
** HEADER
** 2 magic bytes: 1 and 4.
** 17 char for the name of the sample.
** 3 bytes: level, tune and channels (0 for channels is mono while 1 is stereo)
** 4 uint32: sampleStart, loopEnd, sampleFrames and loopLength
** 1 byte: loopMode (0 no loop, 1 forward looping)
** 1 byte: number of beat in loop
** 1 uint16: sampleRate
**
** DATA
** Data are always non compressed 16 bits interleaved
*/
#define HEADER_LENGTH 42 /* Sum of above data fields. */
#define HEADER_NAME_LEN 17 /* Length of name string. */
#define SFE_MPC_NO_MARKER 666
/*------------------------------------------------------------------------------
** Private static functions.
*/
static int mpc2k_close (SF_PRIVATE *psf) ;
static int mpc2k_write_header (SF_PRIVATE *psf, int calc_length) ;
static int mpc2k_read_header (SF_PRIVATE *psf) ;
/*------------------------------------------------------------------------------
** Public function.
*/
int
mpc2k_open (SF_PRIVATE *psf)
{ int error = 0 ;
if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
{ if ((error = mpc2k_read_header (psf)))
return error ;
} ;
if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_MPC2K)
return SFE_BAD_OPEN_FORMAT ;
if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
{ if (mpc2k_write_header (psf, SF_FALSE))
return psf->error ;
psf->write_header = mpc2k_write_header ;
} ;
psf->container_close = mpc2k_close ;
psf->blockwidth = psf->bytewidth * psf->sf.channels ;
error = pcm_init (psf) ;
return error ;
} /* mpc2k_open */
/*------------------------------------------------------------------------------
*/
static int
mpc2k_close (SF_PRIVATE *psf)
{
if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
mpc2k_write_header (psf, SF_TRUE) ;
return 0 ;
} /* mpc2k_close */
static int
mpc2k_write_header (SF_PRIVATE *psf, int calc_length)
{ char sample_name [HEADER_NAME_LEN + 1] ;
sf_count_t current ;
if (psf->pipeoffset > 0)
return 0 ;
current = psf_ftell (psf) ;
if (calc_length)
{ psf->filelength = psf_get_filelen (psf) ;
psf->dataoffset = HEADER_LENGTH ;
psf->datalength = psf->filelength - psf->dataoffset ;
psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
} ;
/* Reset the current header length to zero. */
psf->header [0] = 0 ;
psf->headindex = 0 ;
/*
** Only attempt to seek if we are not writng to a pipe. If we are
** writing to a pipe we shouldn't be here anyway.
*/
if (psf->is_pipe == SF_FALSE)
psf_fseek (psf, 0, SEEK_SET) ;
snprintf (sample_name, sizeof (sample_name), "%s ", psf->file.name.c) ;
psf_binheader_writef (psf, "e11b", 1, 4, sample_name, make_size_t (HEADER_NAME_LEN)) ;
psf_binheader_writef (psf, "e111", 100, 0, (psf->sf.channels - 1) & 1) ;
psf_binheader_writef (psf, "et4888", 0, psf->sf.frames, psf->sf.frames, psf->sf.frames) ;
psf_binheader_writef (psf, "e112", 0, 1, (uint16_t) psf->sf.samplerate) ;
/* Always 16 bit little endian data. */
psf->bytewidth = 2 ;
psf->endian = SF_ENDIAN_LITTLE ;
psf_fwrite (psf->header, psf->headindex, 1, psf) ;
if (psf->error)
return psf->error ;
psf->dataoffset = psf->headindex ;
if (current > 0)
psf_fseek (psf, current, SEEK_SET) ;
return psf->error ;
} /* mpc2k_write_header */
static int
mpc2k_read_header (SF_PRIVATE *psf)
{ char sample_name [HEADER_NAME_LEN + 1] ;
unsigned char bytes [4] ;
uint32_t sample_start, loop_end, sample_frames, loop_length ;
uint16_t sample_rate ;
psf_binheader_readf (psf, "pebb", 0, bytes, 2, sample_name, make_size_t (HEADER_NAME_LEN)) ;
if (bytes [0] != 1 || bytes [1] != 4)
return SFE_MPC_NO_MARKER ;
sample_name [HEADER_NAME_LEN] = 0 ;
psf_log_printf (psf, "MPC2000\n Name : %s\n", sample_name) ;
psf_binheader_readf (psf, "eb4444", bytes, 3, &sample_start, &loop_end, &sample_frames, &loop_length) ;
psf->sf.channels = bytes [2] ? 2 : 1 ;
psf_log_printf (psf, " Level : %d\n Tune : %d\n Stereo : %s\n", bytes [0], bytes [1], bytes [2] ? "Yes" : "No") ;
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) ;
psf_binheader_readf (psf, "eb2", bytes, 2, &sample_rate) ;
psf_log_printf (psf, " Loop mode : %s\n Beats : %d\n Sample rate : %d\nEnd\n", bytes [0] ? "None" : "Fwd", bytes [1], sample_rate) ;
psf->sf.samplerate = sample_rate ;
psf->sf.format = SF_FORMAT_MPC2K | SF_FORMAT_PCM_16 ;
psf->dataoffset = psf_ftell (psf) ;
/* Always 16 bit little endian data. */
psf->bytewidth = 2 ;
psf->endian = SF_ENDIAN_LITTLE ;
psf->datalength = psf->filelength - psf->dataoffset ;
psf->blockwidth = psf->sf.channels * psf->bytewidth ;
psf->sf.frames = psf->datalength / psf->blockwidth ;
psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ;
return 0 ;
} /* mpc2k_read_header */
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