--- /dev/null
+/*
+** 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 */
+
projects / Faustine.git / blobdiff