X-Git-Url: https://scm.cri.ensmp.fr/git/Faustine.git/blobdiff_plain/1059e1cc0c2ecfa237406949aa26155b6a5b9154..66f23d4fabf89ad09adbd4dfc15ac6b5b2b7da83:/interpreter/lib/src/libsndfile-1.0.25/src/mpc2k.c?ds=sidebyside diff --git a/interpreter/lib/src/libsndfile-1.0.25/src/mpc2k.c b/interpreter/lib/src/libsndfile-1.0.25/src/mpc2k.c new file mode 100644 index 0000000..0170f7c --- /dev/null +++ b/interpreter/lib/src/libsndfile-1.0.25/src/mpc2k.c @@ -0,0 +1,204 @@ +/* +** Copyright (C) 2008-2011 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 [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 */ +