/* ** Copyright (C) 2008-2017 Erik de Castro Lopo ** ** 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 #include #include #include #include "sndfile.h" #include "sfendian.h" #include "common.h" /* ** Info from Olivier Tristan ** ** 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.ptr [0] = 0 ; psf->header.indx = 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", HEADER_NAME_LEN, HEADER_NAME_LEN, psf->file.name.c) ; psf_binheader_writef (psf, "e11b", BHW1 (1), BHW1 (4), BHWv (sample_name), BHWz (HEADER_NAME_LEN)) ; psf_binheader_writef (psf, "e111", BHW1 (100), BHW1 (0), BHW1 ((psf->sf.channels - 1) & 1)) ; psf_binheader_writef (psf, "et4888", BHW4 (0), BHW8 (psf->sf.frames), BHW8 (psf->sf.frames), BHW8 (psf->sf.frames)) ; psf_binheader_writef (psf, "e112", BHW1 (0), BHW1 (1), BHW2 ((uint16_t) psf->sf.samplerate)) ; /* Always 16 bit little endian data. */ psf->bytewidth = 2 ; psf->endian = SF_ENDIAN_LITTLE ; psf_fwrite (psf->header.ptr, psf->header.indx, 1, psf) ; if (psf->error) return psf->error ; psf->dataoffset = psf->header.indx ; 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 */