| /* |
| ** Copyright (C) 2004-2011 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 <string.h> |
| |
| #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 (psf->sf.format) ; |
| 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 ((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 [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) ; |
| |
| psf_binheader_writef (psf, "Emz22", TWOBIT_MARKER, make_size_t (8), |
| psf->sf.channels == 2 ? 0xFFFF : 0, psf->bytewidth * 8) ; |
| |
| sign = ((SF_CODEC (psf->sf.format)) == SF_FORMAT_PCM_U8) ? 0 : 0xFFFF ; |
| |
| psf_binheader_writef (psf, "E222", sign, 0, 0xFFFF) ; |
| psf_binheader_writef (psf, "E4444", psf->sf.samplerate, psf->sf.frames, 0, 0) ; |
| |
| psf_binheader_writef (psf, "E222zz", 0, 0, 0, make_size_t (20), make_size_t (64)) ; |
| |
| /* Header construction complete so write it out. */ |
| 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 ; |
| } /* 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 */ |
| |