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Diffstat (limited to 'nylsf/au.c')
| -rw-r--r-- | nylsf/au.c | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/nylsf/au.c b/nylsf/au.c new file mode 100644 index 0000000..3a5f93b --- /dev/null +++ b/nylsf/au.c @@ -0,0 +1,453 @@ +/* +** Copyright (C) 1999-2004 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 <fcntl.h> +#include <string.h> +#include <ctype.h> + +#include "sndfile.h" +#include "sfendian.h" +#include "common.h" + +/*------------------------------------------------------------------------------ +** Macros to handle big/little endian issues. +*/ + +#define DOTSND_MARKER (MAKE_MARKER ('.', 's', 'n', 'd')) +#define DNSDOT_MARKER (MAKE_MARKER ('d', 'n', 's', '.')) + +#define AU_DATA_OFFSET 24 + +/*------------------------------------------------------------------------------ +** Known AU file encoding types. +*/ + +enum +{ AU_ENCODING_ULAW_8 = 1, /* 8-bit u-law samples */ + AU_ENCODING_PCM_8 = 2, /* 8-bit linear samples */ + AU_ENCODING_PCM_16 = 3, /* 16-bit linear samples */ + AU_ENCODING_PCM_24 = 4, /* 24-bit linear samples */ + AU_ENCODING_PCM_32 = 5, /* 32-bit linear samples */ + + AU_ENCODING_FLOAT = 6, /* floating-point samples */ + AU_ENCODING_DOUBLE = 7, /* double-precision float samples */ + AU_ENCODING_INDIRECT = 8, /* fragmented sampled data */ + AU_ENCODING_NESTED = 9, /* ? */ + AU_ENCODING_DSP_CORE = 10, /* DSP program */ + AU_ENCODING_DSP_DATA_8 = 11, /* 8-bit fixed-point samples */ + AU_ENCODING_DSP_DATA_16 = 12, /* 16-bit fixed-point samples */ + AU_ENCODING_DSP_DATA_24 = 13, /* 24-bit fixed-point samples */ + AU_ENCODING_DSP_DATA_32 = 14, /* 32-bit fixed-point samples */ + + AU_ENCODING_DISPLAY = 16, /* non-audio display data */ + AU_ENCODING_MULAW_SQUELCH = 17, /* ? */ + AU_ENCODING_EMPHASIZED = 18, /* 16-bit linear with emphasis */ + AU_ENCODING_NEXT = 19, /* 16-bit linear with compression (NEXT) */ + AU_ENCODING_COMPRESSED_EMPHASIZED = 20, /* A combination of the two above */ + AU_ENCODING_DSP_COMMANDS = 21, /* Music Kit DSP commands */ + AU_ENCODING_DSP_COMMANDS_SAMPLES = 22, /* ? */ + + AU_ENCODING_ADPCM_G721_32 = 23, /* G721 32 kbs ADPCM - 4 bits per sample. */ + AU_ENCODING_ADPCM_G722 = 24, /* G722 64 kbs ADPCM */ + AU_ENCODING_ADPCM_G723_24 = 25, /* G723 24 kbs ADPCM - 3 bits per sample. */ + AU_ENCODING_ADPCM_G723_40 = 26, /* G723 40 kbs ADPCM - 5 bits per sample. */ + + AU_ENCODING_ALAW_8 = 27 +} ; + +/*------------------------------------------------------------------------------ +** Typedefs. +*/ + +typedef struct +{ int dataoffset ; + int datasize ; + int encoding ; + int samplerate ; + int channels ; +} AU_FMT ; + + +/*------------------------------------------------------------------------------ +** Private static functions. +*/ + +static int au_close (SF_PRIVATE *psf) ; + +static int au_format_to_encoding (int format) ; + +static int au_write_header (SF_PRIVATE *psf, int calc_length) ; +static int au_read_header (SF_PRIVATE *psf) ; + +/*------------------------------------------------------------------------------ +** Public function. +*/ + +int +au_open (SF_PRIVATE *psf) +{ int subformat ; + int error = 0 ; + + if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0)) + { if ((error = au_read_header (psf))) + return error ; + } ; + + if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_AU) + return SFE_BAD_OPEN_FORMAT ; + + subformat = psf->sf.format & SF_FORMAT_SUBMASK ; + + if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR) + { psf->endian = psf->sf.format & SF_FORMAT_ENDMASK ; + if (CPU_IS_LITTLE_ENDIAN && psf->endian == SF_ENDIAN_CPU) + psf->endian = SF_ENDIAN_LITTLE ; + else if (psf->endian != SF_ENDIAN_LITTLE) + psf->endian = SF_ENDIAN_BIG ; + + if (au_write_header (psf, SF_FALSE)) + return psf->error ; + + psf->write_header = au_write_header ; + } ; + + psf->container_close = au_close ; + + psf->blockwidth = psf->bytewidth * psf->sf.channels ; + + switch (subformat) + { case SF_FORMAT_ULAW : /* 8-bit Ulaw encoding. */ + ulaw_init (psf) ; + break ; + + case SF_FORMAT_PCM_S8 : /* 8-bit linear PCM. */ + error = pcm_init (psf) ; + break ; + + case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */ + case SF_FORMAT_PCM_24 : /* 24-bit linear PCM */ + case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */ + error = pcm_init (psf) ; + break ; + + case SF_FORMAT_ALAW : /* 8-bit Alaw encoding. */ + alaw_init (psf) ; + break ; + + /* Lite remove start */ + case SF_FORMAT_FLOAT : /* 32-bit floats. */ + error = float32_init (psf) ; + break ; + + case SF_FORMAT_DOUBLE : /* 64-bit double precision floats. */ + error = double64_init (psf) ; + break ; + + case SF_FORMAT_G721_32 : + error = g72x_init (psf) ; + psf->sf.seekable = SF_FALSE ; + break ; + + case SF_FORMAT_G723_24 : + error = g72x_init (psf) ; + psf->sf.seekable = SF_FALSE ; + break ; + + case SF_FORMAT_G723_40 : + error = g72x_init (psf) ; + psf->sf.seekable = SF_FALSE ; + break ; + /* Lite remove end */ + + default : break ; + } ; + + return error ; +} /* au_open */ + +/*------------------------------------------------------------------------------ +*/ + +static int +au_close (SF_PRIVATE *psf) +{ + if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR) + au_write_header (psf, SF_TRUE) ; + + return 0 ; +} /* au_close */ + +static int +au_write_header (SF_PRIVATE *psf, int calc_length) +{ sf_count_t current ; + int encoding, datalength ; + + 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) ; + } ; + + encoding = au_format_to_encoding (psf->sf.format & SF_FORMAT_SUBMASK) ; + if (! encoding) + return (psf->error = SFE_BAD_OPEN_FORMAT) ; + + /* 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) ; + + /* + ** AU format files allow a datalength value of -1 if the datalength + ** is not know at the time the header is written. + ** Also use this value of -1 if the datalength > 2 gigabytes. + */ + if (psf->datalength < 0 || psf->datalength > 0x7FFFFFFF) + datalength = -1 ; + else + datalength = (int) (psf->datalength & 0x7FFFFFFF) ; + + if (psf->endian == SF_ENDIAN_BIG) + { psf_binheader_writef (psf, "Em4", DOTSND_MARKER, AU_DATA_OFFSET) ; + psf_binheader_writef (psf, "E4444", datalength, encoding, psf->sf.samplerate, psf->sf.channels) ; + } + else if (psf->endian == SF_ENDIAN_LITTLE) + { psf_binheader_writef (psf, "em4", DNSDOT_MARKER, AU_DATA_OFFSET) ; + psf_binheader_writef (psf, "e4444", datalength, encoding, psf->sf.samplerate, psf->sf.channels) ; + } + else + return (psf->error = SFE_BAD_OPEN_FORMAT) ; + + /* 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 ; +} /* au_write_header */ + +static int +au_format_to_encoding (int format) +{ + switch (format) + { case SF_FORMAT_PCM_S8 : return AU_ENCODING_PCM_8 ; + case SF_FORMAT_PCM_16 : return AU_ENCODING_PCM_16 ; + case SF_FORMAT_PCM_24 : return AU_ENCODING_PCM_24 ; + case SF_FORMAT_PCM_32 : return AU_ENCODING_PCM_32 ; + + case SF_FORMAT_FLOAT : return AU_ENCODING_FLOAT ; + case SF_FORMAT_DOUBLE : return AU_ENCODING_DOUBLE ; + + case SF_FORMAT_ULAW : return AU_ENCODING_ULAW_8 ; + case SF_FORMAT_ALAW : return AU_ENCODING_ALAW_8 ; + + case SF_FORMAT_G721_32 : return AU_ENCODING_ADPCM_G721_32 ; + case SF_FORMAT_G723_24 : return AU_ENCODING_ADPCM_G723_24 ; + case SF_FORMAT_G723_40 : return AU_ENCODING_ADPCM_G723_40 ; + + default : break ; + } ; + return 0 ; +} /* au_format_to_encoding */ + +static int +au_read_header (SF_PRIVATE *psf) +{ AU_FMT au_fmt ; + int marker, dword ; + + memset (&au_fmt, 0, sizeof (au_fmt)) ; + psf_binheader_readf (psf, "pm", 0, &marker) ; + psf_log_printf (psf, "%M\n", marker) ; + + if (marker == DOTSND_MARKER) + { psf->endian = SF_ENDIAN_BIG ; + + psf_binheader_readf (psf, "E44444", &(au_fmt.dataoffset), &(au_fmt.datasize), + &(au_fmt.encoding), &(au_fmt.samplerate), &(au_fmt.channels)) ; + } + else if (marker == DNSDOT_MARKER) + { psf->endian = SF_ENDIAN_LITTLE ; + psf_binheader_readf (psf, "e44444", &(au_fmt.dataoffset), &(au_fmt.datasize), + &(au_fmt.encoding), &(au_fmt.samplerate), &(au_fmt.channels)) ; + } + else + return SFE_AU_NO_DOTSND ; + + psf_log_printf (psf, " Data Offset : %d\n", au_fmt.dataoffset) ; + + if (psf->fileoffset > 0 && au_fmt.datasize == -1) + { psf_log_printf (psf, " Data Size : -1\n") ; + return SFE_AU_EMBED_BAD_LEN ; + } ; + + if (psf->fileoffset > 0) + { psf->filelength = au_fmt.dataoffset + au_fmt.datasize ; + psf_log_printf (psf, " Data Size : %d\n", au_fmt.datasize) ; + } + else if (au_fmt.datasize == -1 || au_fmt.dataoffset + au_fmt.datasize == psf->filelength) + psf_log_printf (psf, " Data Size : %d\n", au_fmt.datasize) ; + else if (au_fmt.dataoffset + au_fmt.datasize < psf->filelength) + { psf->filelength = au_fmt.dataoffset + au_fmt.datasize ; + psf_log_printf (psf, " Data Size : %d\n", au_fmt.datasize) ; + } + else + { dword = psf->filelength - au_fmt.dataoffset ; + psf_log_printf (psf, " Data Size : %d (should be %d)\n", au_fmt.datasize, dword) ; + au_fmt.datasize = dword ; + } ; + + psf->dataoffset = au_fmt.dataoffset ; + psf->datalength = psf->filelength - psf->dataoffset ; + + if (psf_ftell (psf) < psf->dataoffset) + psf_binheader_readf (psf, "j", psf->dataoffset - psf_ftell (psf)) ; + + psf->sf.samplerate = au_fmt.samplerate ; + psf->sf.channels = au_fmt.channels ; + + /* Only fill in type major. */ + if (psf->endian == SF_ENDIAN_BIG) + psf->sf.format = SF_FORMAT_AU ; + else if (psf->endian == SF_ENDIAN_LITTLE) + psf->sf.format = SF_ENDIAN_LITTLE | SF_FORMAT_AU ; + + psf_log_printf (psf, " Encoding : %d => ", au_fmt.encoding) ; + + psf->sf.format = psf->sf.format & SF_FORMAT_ENDMASK ; + + switch (au_fmt.encoding) + { case AU_ENCODING_ULAW_8 : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_ULAW ; + psf->bytewidth = 1 ; /* Before decoding */ + psf_log_printf (psf, "8-bit ISDN u-law\n") ; + break ; + + case AU_ENCODING_PCM_8 : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_S8 ; + psf->bytewidth = 1 ; + psf_log_printf (psf, "8-bit linear PCM\n") ; + break ; + + case AU_ENCODING_PCM_16 : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_16 ; + psf->bytewidth = 2 ; + psf_log_printf (psf, "16-bit linear PCM\n") ; + break ; + + case AU_ENCODING_PCM_24 : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_24 ; + psf->bytewidth = 3 ; + psf_log_printf (psf, "24-bit linear PCM\n") ; + break ; + + case AU_ENCODING_PCM_32 : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_PCM_32 ; + psf->bytewidth = 4 ; + psf_log_printf (psf, "32-bit linear PCM\n") ; + break ; + + case AU_ENCODING_FLOAT : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_FLOAT ; + psf->bytewidth = 4 ; + psf_log_printf (psf, "32-bit float\n") ; + break ; + + case AU_ENCODING_DOUBLE : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_DOUBLE ; + psf->bytewidth = 8 ; + psf_log_printf (psf, "64-bit double precision float\n") ; + break ; + + case AU_ENCODING_ALAW_8 : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_ALAW ; + psf->bytewidth = 1 ; /* Before decoding */ + psf_log_printf (psf, "8-bit ISDN A-law\n") ; + break ; + + case AU_ENCODING_ADPCM_G721_32 : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_G721_32 ; + psf->bytewidth = 0 ; + psf_log_printf (psf, "G721 32kbs ADPCM\n") ; + break ; + + case AU_ENCODING_ADPCM_G723_24 : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_G723_24 ; + psf->bytewidth = 0 ; + psf_log_printf (psf, "G723 24kbs ADPCM\n") ; + break ; + + case AU_ENCODING_ADPCM_G723_40 : + psf->sf.format |= SF_FORMAT_AU | SF_FORMAT_G723_40 ; + psf->bytewidth = 0 ; + psf_log_printf (psf, "G723 40kbs ADPCM\n") ; + break ; + + case AU_ENCODING_ADPCM_G722 : + psf_log_printf (psf, "G722 64 kbs ADPCM (unsupported)\n") ; + break ; + + case AU_ENCODING_NEXT : + psf_log_printf (psf, "Weird NeXT encoding format (unsupported)\n") ; + break ; + + default : + psf_log_printf (psf, "Unknown!!\n") ; + break ; + } ; + + psf_log_printf (psf, " Sample Rate : %d\n", au_fmt.samplerate) ; + psf_log_printf (psf, " Channels : %d\n", au_fmt.channels) ; + + psf->blockwidth = psf->sf.channels * psf->bytewidth ; + + if (! psf->sf.frames && psf->blockwidth) + psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ; + + return 0 ; +} /* au_read_header */ +/* +** Do not edit or modify anything in this comment block. +** The arch-tag line is a file identity tag for the GNU Arch +** revision control system. +** +** arch-tag: 31f691b1-cde9-4ed2-9469-6bca60fb9cd0 +*/ |