/*

** Copyright (C) 1999-2016 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->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))

	{	if ((error = au_read_header (psf)))

			return error ;

		} ;

	if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_AU)

		return	SFE_BAD_OPEN_FORMAT ;

	subformat = SF_CODEC (psf->sf.format) ;

	if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)

	{	psf->endian = SF_ENDIAN (psf->sf.format) ;

		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->file.mode == SFM_WRITE || psf->file.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 ;

		} ;

	encoding = au_format_to_encoding (SF_CODEC (psf->sf.format)) ;

	if (! encoding)

		return (psf->error = SFE_BAD_OPEN_FORMAT) ;

	/* 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) ;

	/*

	**	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.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 ;

} /* 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 = SF_ENDIAN (psf->sf.format) ;

	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) ;

	if (au_fmt.channels < 1)

	{	psf_log_printf (psf, "  Channels    : %d  **** should be >= 1\n", au_fmt.channels) ;

		return SFE_CHANNEL_COUNT_ZERO ;

		}

	else if (au_fmt.channels > SF_MAX_CHANNELS)

	{	psf_log_printf (psf, "  Channels    : %d  **** should be <= %d\n", au_fmt.channels, SF_MAX_CHANNELS) ;

		return SFE_CHANNEL_COUNT ;

		} ;

	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 */