sndfile.c

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	psf->last_op = SFM_READ ;

	if (psf->read_current > psf->sf.frames)
	{	count = psf->sf.channels * (psf->read_current - psf->sf.frames) ;
		psf->read_current = psf->sf.frames ;
		} ;

	return count / psf->sf.channels ;
} /* sf_readf_int */

/*------------------------------------------------------------------------------
*/

sf_count_t
sf_read_float	(SNDFILE *sndfile, float *ptr, sf_count_t len)
{	SF_PRIVATE 	*psf ;
	sf_count_t	count, extra ;

	VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf, 1) ;

	if (psf->mode == SFM_WRITE)
	{	psf->error = SFE_NOT_READMODE ;
		return 0 ;
		} ;

	if (len % psf->sf.channels)
	{	psf->error = SFE_BAD_READ_ALIGN ;
		return 0 ;
		} ;

	if (len <= 0 || psf->read_current >= psf->sf.frames)
	{	psf_memset (ptr, 0, len * sizeof (float)) ;
		return 0 ;
		} ;

	if (! psf->read_float || psf->seek == NULL)
	{	psf->error = SFE_UNIMPLEMENTED ;
		return	0 ;
		} ;

	if (psf->last_op != SFM_READ)
		if (psf->seek (psf, SFM_READ, psf->read_current) < 0)
			return 0 ;

	count = psf->read_float (psf, ptr, len) ;

	if (psf->read_current + count / psf->sf.channels > psf->sf.frames)
	{	count = (psf->sf.frames - psf->read_current) * psf->sf.channels ;
		extra = len - count ;
		psf_memset (ptr + count, 0, extra * sizeof (float)) ;
		psf->read_current = psf->sf.frames ;
		} ;

	psf->read_current += count / psf->sf.channels ;

	psf->last_op = SFM_READ ;

	if (psf->read_current > psf->sf.frames)
	{	count = psf->sf.channels * (psf->read_current - psf->sf.frames) ;
		psf->read_current = psf->sf.frames ;
		} ;

	return count ;
} /* sf_read_float */

sf_count_t
sf_readf_float	(SNDFILE *sndfile, float *ptr, sf_count_t frames)
{	SF_PRIVATE 	*psf ;
	sf_count_t	count, extra ;

	VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf, 1) ;

	if (psf->mode == SFM_WRITE)
	{	psf->error = SFE_NOT_READMODE ;
		return 0 ;
		} ;

	if (frames <= 0 || psf->read_current >= psf->sf.frames)
	{	psf_memset (ptr, 0, frames * psf->sf.channels * sizeof (float)) ;
		return 0 ;
		} ;

	if (! psf->read_float || psf->seek == NULL)
	{	psf->error = SFE_UNIMPLEMENTED ;
		return	0 ;
		} ;

	if (psf->last_op != SFM_READ)
		if (psf->seek (psf, SFM_READ, psf->read_current) < 0)
			return 0 ;

	count = psf->read_float (psf, ptr, frames * psf->sf.channels) ;

	if (psf->read_current + count / psf->sf.channels > psf->sf.frames)
	{	count = (psf->sf.frames - psf->read_current) * psf->sf.channels ;
		extra = frames * psf->sf.channels - count ;
		psf_memset (ptr + count, 0, extra * sizeof (float)) ;
		psf->read_current = psf->sf.frames ;
		} ;

	psf->read_current += count / psf->sf.channels ;

	psf->last_op = SFM_READ ;

	if (psf->read_current > psf->sf.frames)
	{	count = psf->sf.channels * (psf->read_current - psf->sf.frames) ;
		psf->read_current = psf->sf.frames ;
		} ;

	return count / psf->sf.channels ;
} /* sf_readf_float */

/*------------------------------------------------------------------------------
*/

sf_count_t
sf_read_double	(SNDFILE *sndfile, double *ptr, sf_count_t len)
{	SF_PRIVATE 	*psf ;
	sf_count_t	count, extra ;

	VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf, 1) ;

	if (psf->mode == SFM_WRITE)
	{	psf->error = SFE_NOT_READMODE ;
		return 0 ;
		} ;

	if (len % psf->sf.channels)
	{	psf->error = SFE_BAD_READ_ALIGN ;
		return 0 ;
		} ;

	if (len <= 0 || psf->read_current >= psf->sf.frames)
	{	psf_memset (ptr, 0, len * sizeof (double)) ;
		return 0 ;
		} ;

	if (! psf->read_double || psf->seek == NULL)
	{	psf->error = SFE_UNIMPLEMENTED ;
		return	0 ;
		} ;

	if (psf->last_op != SFM_READ)
		if (psf->seek (psf, SFM_READ, psf->read_current) < 0)
			return 0 ;

	count = psf->read_double (psf, ptr, len) ;

	if (psf->read_current + count / psf->sf.channels > psf->sf.frames)
	{	count = (psf->sf.frames - psf->read_current) * psf->sf.channels ;
		extra = len - count ;
		psf_memset (ptr + count, 0, extra * sizeof (double)) ;
		psf->read_current = psf->sf.frames ;
		} ;

	psf->read_current += count / psf->sf.channels ;

	psf->last_op = SFM_READ ;

	if (psf->read_current > psf->sf.frames)
	{	count = psf->sf.channels * (psf->read_current - psf->sf.frames) ;
		psf->read_current = psf->sf.frames ;
		} ;

	return count ;
} /* sf_read_double */

sf_count_t
sf_readf_double	(SNDFILE *sndfile, double *ptr, sf_count_t frames)
{	SF_PRIVATE 	*psf ;
	sf_count_t	count, extra ;

	VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf, 1) ;

	if (psf->mode == SFM_WRITE)
	{	psf->error = SFE_NOT_READMODE ;
		return 0 ;
		} ;

	if (frames <= 0 || psf->read_current >= psf->sf.frames)
	{	psf_memset (ptr, 0, frames * psf->sf.channels * sizeof (double)) ;
		return 0 ;
		} ;

	if (! psf->read_double || psf->seek == NULL)
	{	psf->error = SFE_UNIMPLEMENTED ;
		return	0 ;
		} ;

	if (psf->last_op != SFM_READ)
		if (psf->seek (psf, SFM_READ, psf->read_current) < 0)
			return 0 ;

	count = psf->read_double (psf, ptr, frames * psf->sf.channels) ;

	if (psf->read_current + count / psf->sf.channels > psf->sf.frames)
	{	count = (psf->sf.frames - psf->read_current) * psf->sf.channels ;
		extra = frames * psf->sf.channels - count ;
		psf_memset (ptr + count, 0, extra * sizeof (double)) ;
		psf->read_current = psf->sf.frames ;
		} ;

	psf->read_current += count / psf->sf.channels ;

	psf->last_op = SFM_READ ;

	if (psf->read_current > psf->sf.frames)
	{	count = psf->sf.channels * (psf->read_current - psf->sf.frames) ;
		psf->read_current = psf->sf.frames ;
		} ;

	return count / psf->sf.channels ;
} /* sf_readf_double */

/*------------------------------------------------------------------------------
*/

sf_count_t
sf_write_raw	(SNDFILE *sndfile, void *ptr, sf_count_t len)
{	SF_PRIVATE 	*psf ;
	sf_count_t	count ;
	int			bytewidth, blockwidth ;

	VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf, 1) ;

	bytewidth = (psf->bytewidth > 0) ? psf->bytewidth : 1 ;
	blockwidth = (psf->blockwidth > 0) ? psf->blockwidth : 1 ;

	if (psf->mode == SFM_READ)
	{	psf->error = SFE_NOT_WRITEMODE ;
		return 0 ;
		} ;

	if (len % (psf->sf.channels * bytewidth))
	{	psf->error = SFE_BAD_WRITE_ALIGN ;
		return 0 ;
		} ;

	if (psf->have_written == SF_FALSE && psf->write_header != NULL)
		psf->write_header (psf, SF_FALSE) ;
	psf->have_written = SF_TRUE ;

	count = psf_fwrite (ptr, 1, len, psf) ;

	psf->write_current += count / blockwidth ;

	if (psf->write_current > psf->sf.frames)
		psf->sf.frames = psf->write_current ;

	psf->last_op = SFM_WRITE ;

	return count ;
} /* sf_write_raw */

/*------------------------------------------------------------------------------
*/

sf_count_t
sf_write_short	(SNDFILE *sndfile, short *ptr, sf_count_t len)
{	SF_PRIVATE 	*psf ;
	sf_count_t	count ;

	VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf, 1) ;

	if (psf->mode == SFM_READ)
	{	psf->error = SFE_NOT_WRITEMODE ;
		return 0 ;
		} ;

	if (len % psf->sf.channels)
	{	psf->error = SFE_BAD_WRITE_ALIGN ;
		return 0 ;
		} ;

	if (! psf->write_short || psf->seek == NULL)
	{	psf->error = SFE_UNIMPLEMENTED ;
		return 0 ;
		} ;

	if (psf->last_op != SFM_WRITE)
		if (psf->seek (psf, SFM_WRITE, psf->write_current) < 0)
			return 0 ;

	if (psf->have_written == SF_FALSE && psf->write_header != NULL)
		psf->write_header (psf, SF_FALSE) ;
	psf->have_written = SF_TRUE ;

	count = psf->write_short (psf, ptr, len) ;

	psf->write_current += count / psf->sf.channels ;

	psf->last_op = SFM_WRITE ;

	if (psf->auto_header)
		psf->write_header (psf, SF_TRUE) ;

	if (psf->write_current > psf->sf.frames)
		psf->sf.frames = psf->write_current ;

	return count ;
} /* sf_write_short */

sf_count_t
sf_writef_short	(SNDFILE *sndfile, short *ptr, sf_count_t frames)
{	SF_PRIVATE 	*psf ;
	sf_count_t	count ;

	VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf, 1) ;

	if (psf->mode == SFM_READ)
	{	psf->error = SFE_NOT_WRITEMODE ;
		return 0 ;
		} ;

	if (! psf->write_short || psf->seek == NULL)
	{	psf->error = SFE_UNIMPLEMENTED ;
		return 0 ;
		} ;

	if (psf->last_op != SFM_WRITE)
		if (psf->seek (psf, SFM_WRITE, psf->write_current) < 0)
			return 0 ;

	if (psf->have_written == SF_FALSE && psf->write_header != NULL)
		psf->write_header (psf, SF_FALSE) ;
	psf->have_written = SF_TRUE ;

	count = psf->write_short (psf, ptr, frames * psf->sf.channels) ;

	psf->write_current += count / psf->sf.channels ;

	psf->last_op = SFM_WRITE ;

	if (psf->auto_header)
		psf->write_header (psf, SF_TRUE) ;

	if (psf->write_current > psf->sf.frames)
		psf->sf.frames = psf->write_current ;

	return count / psf->sf.channels ;
} /* sf_writef_short */

/*------------------------------------------------------------------------------
*/

sf_count_t
sf_write_int	(SNDFILE *sndfile, int *ptr, sf_count_t len)
{	SF_PRIVATE 	*psf ;
	sf_count_t	count ;

	VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf, 1) ;

	if (psf->mode == SFM_READ)
	{	psf->error = SFE_NOT_WRITEMODE ;
		return 0 ;
		} ;

	if (len % psf->sf.channels)
	{	psf->error = SFE_BAD_WRITE_ALIGN ;
		return 0 ;
		} ;

	if (! psf->write_int || psf->seek == NULL)
	{	psf->error = SFE_UNIMPLEMENTED ;
		return 0 ;
		} ;

	if (psf->last_op != SFM_WRITE)
		if (psf->seek (psf, SFM_WRITE, psf->write_current) < 0)
			return 0 ;

	if (psf->have_written == SF_FALSE && psf->write_header != NULL)
		psf->write_header (psf, SF_FALSE) ;
	psf->have_written = SF_TRUE ;

	count = psf->write_int (psf, ptr, len) ;

	psf->write_current += count / psf->sf.channels ;

	psf->last_op = SFM_WRITE ;

	if (psf->auto_header)
		psf->write_header (psf, SF_TRUE) ;

	if (psf->write_current > psf->sf.frames)
		psf->sf.frames = psf->write_current ;

	return count ;
} /* sf_write_int */

sf_count_t
sf_writef_int	(SNDFILE *sndfile, int *ptr, sf_count_t frames)
{	SF_PRIVATE 	*psf ;
	sf_count_t	count ;

	VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf, 1) ;

	if (psf->mode == SFM_READ)
	{	psf->error = SFE_NOT_WRITEMODE ;
		return 0 ;
		} ;

	if (! psf->write_int || psf->seek == NULL)
	{	psf->error = SFE_UNIMPLEMENTED ;
		return 0 ;
		} ;

	if (psf->last_op != SFM_WRITE)
		if (psf->seek (psf, SFM_WRITE, psf->write_current) < 0)
			return 0 ;

	if (psf->have_written == SF_FALSE && psf->write_header != NULL)
		psf->write_header (psf, SF_FALSE) ;
	psf->have_written = SF_TRUE ;

	count = psf->write_int (psf, ptr, frames * psf->sf.channels) ;

	psf->write_current += count / psf->sf.channels ;

	psf->last_op = SFM_WRITE ;

	if (psf->auto_header)
		psf->write_header (psf, SF_TRUE) ;

	if (psf->write_current > psf->sf.frames)
		psf->sf.frames = psf->write_current ;

	return count / psf->sf.channels ;
} /* sf_writef_int */

/*------------------------------------------------------------------------------
*/

sf_count_t
sf_write_float	(SNDFILE *sndfile, float *ptr, sf_count_t len)
{	SF_PRIVATE 	*psf ;
	sf_count_t	count ;

	VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf, 1) ;

	if (psf->mode == SFM_READ)
	{	psf->error = SFE_NOT_WRITEMODE ;
		return 0 ;
		} ;