/* ** Copyright (C) 2004-2017 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 "sndfile.h" #include "sfendian.h" #include "common.h" #define TWOBIT_MARKER (MAKE_MARKER ('2', 'B', 'I', 'T')) #define AVR_HDR_SIZE 128 #define SFE_AVR_X 666 /* ** From: hyc@hanauma.Jpl.Nasa.Gov (Howard Chu) ** ** A lot of PD software exists to play Mac .snd files on the ST. One other ** format that seems pretty popular (used by a number of commercial packages) ** is the AVR format (from Audio Visual Research). This format has a 128 byte ** header that looks like this (its actually packed, but thats not portable): */ typedef struct { int marker ; /* 2BIT */ char name [8] ; /* null-padded sample name */ short mono ; /* 0 = mono, 0xffff = stereo */ short rez ; /* 8 = 8 bit, 16 = 16 bit */ short sign ; /* 0 = unsigned, 0xffff = signed */ short loop ; /* 0 = no loop, 0xffff = looping sample */ short midi ; /* 0xffff = no MIDI note assigned, */ /* 0xffXX = single key note assignment */ /* 0xLLHH = key split, low/hi note */ int srate ; /* sample frequency in hertz */ int frames ; /* sample length in bytes or words (see rez) */ int lbeg ; /* offset to start of loop in bytes or words. */ /* set to zero if unused */ int lend ; /* offset to end of loop in bytes or words. */ /* set to sample length if unused */ short res1 ; /* Reserved, MIDI keyboard split */ short res2 ; /* Reserved, sample compression */ short res3 ; /* Reserved */ char ext [20] ; /* Additional filename space, used if (name[7] != 0) */ char user [64] ; /* User defined. Typically ASCII message */ } AVR_HEADER ; /*------------------------------------------------------------------------------ ** Private static functions. */ static int avr_close (SF_PRIVATE *psf) ; static int avr_read_header (SF_PRIVATE *psf) ; static int avr_write_header (SF_PRIVATE *psf, int calc_length) ; /*------------------------------------------------------------------------------ ** Public function. */ int avr_open (SF_PRIVATE *psf) { int error = 0 ; if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) { if ((error = avr_read_header (psf))) return error ; } ; if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_AVR) return SFE_BAD_OPEN_FORMAT ; if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) { psf->endian = SF_ENDIAN_BIG ; if (avr_write_header (psf, SF_FALSE)) return psf->error ; psf->write_header = avr_write_header ; } ; psf->container_close = avr_close ; psf->blockwidth = psf->bytewidth * psf->sf.channels ; error = pcm_init (psf) ; return error ; } /* avr_open */ static int avr_read_header (SF_PRIVATE *psf) { AVR_HEADER hdr ; memset (&hdr, 0, sizeof (hdr)) ; psf_binheader_readf (psf, "pmb", 0, &hdr.marker, &hdr.name, sizeof (hdr.name)) ; psf_log_printf (psf, "%M\n", hdr.marker) ; if (hdr.marker != TWOBIT_MARKER) return SFE_AVR_X ; psf_log_printf (psf, " Name : %s\n", hdr.name) ; psf_binheader_readf (psf, "E22222", &hdr.mono, &hdr.rez, &hdr.sign, &hdr.loop, &hdr.midi) ; psf->sf.channels = (hdr.mono & 1) + 1 ; psf_log_printf (psf, " Channels : %d\n Bit width : %d\n Signed : %s\n", (hdr.mono & 1) + 1, hdr.rez, hdr.sign ? "yes" : "no") ; switch (arith_shift_left (hdr.rez, 16) + (hdr.sign & 1)) { case ((8 << 16) + 0) : psf->sf.format = SF_FORMAT_AVR | SF_FORMAT_PCM_U8 ; psf->bytewidth = 1 ; break ; case ((8 << 16) + 1) : psf->sf.format = SF_FORMAT_AVR | SF_FORMAT_PCM_S8 ; psf->bytewidth = 1 ; break ; case ((16 << 16) + 1) : psf->sf.format = SF_FORMAT_AVR | SF_FORMAT_PCM_16 ; psf->bytewidth = 2 ; break ; default : psf_log_printf (psf, "Error : bad rez/sign combination.\n") ; return SFE_AVR_X ; } ; psf_binheader_readf (psf, "E4444", &hdr.srate, &hdr.frames, &hdr.lbeg, &hdr.lend) ; psf->sf.frames = hdr.frames ; psf->sf.samplerate = hdr.srate ; psf_log_printf (psf, " Frames : %D\n", psf->sf.frames) ; psf_log_printf (psf, " Sample rate : %d\n", psf->sf.samplerate) ; psf_binheader_readf (psf, "E222", &hdr.res1, &hdr.res2, &hdr.res3) ; psf_binheader_readf (psf, "bb", hdr.ext, sizeof (hdr.ext), hdr.user, sizeof (hdr.user)) ; psf_log_printf (psf, " Ext : %s\n User : %s\n", hdr.ext, hdr.user) ; psf->endian = SF_ENDIAN_BIG ; psf->dataoffset = AVR_HDR_SIZE ; psf->datalength = hdr.frames * (hdr.rez / 8) ; if (psf->fileoffset > 0) psf->filelength = AVR_HDR_SIZE + psf->datalength ; if (psf_ftell (psf) != psf->dataoffset) psf_binheader_readf (psf, "j", psf->dataoffset - psf_ftell (psf)) ; psf->blockwidth = psf->sf.channels * psf->bytewidth ; if (psf->sf.frames == 0 && psf->blockwidth) psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ; return 0 ; } /* avr_read_header */ static int avr_write_header (SF_PRIVATE *psf, int calc_length) { sf_count_t current ; int sign ; if (psf->pipeoffset > 0) return 0 ; current = psf_ftell (psf) ; if (calc_length) { psf->filelength = psf_get_filelen (psf) ; psf->datalength = psf->filelength - psf->dataoffset ; if (psf->dataend) psf->datalength -= psf->filelength - psf->dataend ; 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) ; psf_binheader_writef (psf, "Emz22", BHWm (TWOBIT_MARKER), BHWz (8), BHW2 (psf->sf.channels == 2 ? 0xFFFF : 0), BHW2 (psf->bytewidth * 8)) ; sign = ((SF_CODEC (psf->sf.format)) == SF_FORMAT_PCM_U8) ? 0 : 0xFFFF ; psf_binheader_writef (psf, "E222", BHW2 (sign), BHW2 (0), BHW2 (0xFFFF)) ; psf_binheader_writef (psf, "E4444", BHW4 (psf->sf.samplerate), BHW4 (psf->sf.frames), BHW4 (0), BHW4 (0)) ; psf_binheader_writef (psf, "E222zz", BHW2 (0), BHW2 (0), BHW2 (0), BHWz (20), BHWz (64)) ; /* Header construction complete so write it out. */ 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 ; } /* avr_write_header */ static int avr_close (SF_PRIVATE *psf) { if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) avr_write_header (psf, SF_TRUE) ; return 0 ; } /* avr_close */