--- /dev/null
+/*
+** Copyright (C) 2002-2011 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 "sfendian.h"
+
+#include <stdlib.h>
+
+#include "sndfile.h"
+#include "common.h"
+
+#define INTERLEAVE_CHANNELS 6
+
+typedef struct
+{ double buffer [SF_BUFFER_LEN / sizeof (double)] ;
+
+ sf_count_t channel_len ;
+
+ sf_count_t (*read_short) (SF_PRIVATE*, short *ptr, sf_count_t len) ;
+ sf_count_t (*read_int) (SF_PRIVATE*, int *ptr, sf_count_t len) ;
+ sf_count_t (*read_float) (SF_PRIVATE*, float *ptr, sf_count_t len) ;
+ sf_count_t (*read_double) (SF_PRIVATE*, double *ptr, sf_count_t len) ;
+
+} INTERLEAVE_DATA ;
+
+
+
+static sf_count_t interleave_read_short (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
+static sf_count_t interleave_read_int (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
+static sf_count_t interleave_read_float (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
+static sf_count_t interleave_read_double (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
+
+static sf_count_t interleave_seek (SF_PRIVATE*, int mode, sf_count_t samples_from_start) ;
+
+
+
+
+int
+interleave_init (SF_PRIVATE *psf)
+{ INTERLEAVE_DATA *pdata ;
+
+ if (psf->file.mode != SFM_READ)
+ return SFE_INTERLEAVE_MODE ;
+
+ if (psf->interleave)
+ { psf_log_printf (psf, "*** Weird, already have interleave.\n") ;
+ return 666 ;
+ } ;
+
+ /* Free this in sf_close() function. */
+ if (! (pdata = malloc (sizeof (INTERLEAVE_DATA))))
+ return SFE_MALLOC_FAILED ;
+
+puts ("interleave_init") ;
+
+ psf->interleave = pdata ;
+
+ /* Save the existing methods. */
+ pdata->read_short = psf->read_short ;
+ pdata->read_int = psf->read_int ;
+ pdata->read_float = psf->read_float ;
+ pdata->read_double = psf->read_double ;
+
+ pdata->channel_len = psf->sf.frames * psf->bytewidth ;
+
+ /* Insert our new methods. */
+ psf->read_short = interleave_read_short ;
+ psf->read_int = interleave_read_int ;
+ psf->read_float = interleave_read_float ;
+ psf->read_double = interleave_read_double ;
+
+ psf->seek = interleave_seek ;
+
+ return 0 ;
+} /* pcm_interleave_init */
+
+/*------------------------------------------------------------------------------
+*/
+
+static sf_count_t
+interleave_read_short (SF_PRIVATE *psf, short *ptr, sf_count_t len)
+{ INTERLEAVE_DATA *pdata ;
+ sf_count_t offset, templen ;
+ int chan, count, k ;
+ short *inptr, *outptr ;
+
+ if (! (pdata = psf->interleave))
+ return 0 ;
+
+ inptr = (short*) pdata->buffer ;
+
+ for (chan = 0 ; chan < psf->sf.channels ; chan++)
+ { outptr = ptr + chan ;
+
+ offset = psf->dataoffset + chan * psf->bytewidth * psf->read_current ;
+
+ if (psf_fseek (psf, offset, SEEK_SET) != offset)
+ { psf->error = SFE_INTERLEAVE_SEEK ;
+ return 0 ;
+ } ;
+
+ templen = len / psf->sf.channels ;
+
+ while (templen > 0)
+ { if (templen > SIGNED_SIZEOF (pdata->buffer) / SIGNED_SIZEOF (short))
+ count = SIGNED_SIZEOF (pdata->buffer) / SIGNED_SIZEOF (short) ;
+ else
+ count = (int) templen ;
+
+ if (pdata->read_short (psf, inptr, count) != count)
+ { psf->error = SFE_INTERLEAVE_READ ;
+ return 0 ;
+ } ;
+
+ for (k = 0 ; k < count ; k++)
+ { *outptr = inptr [k] ;
+ outptr += psf->sf.channels ;
+ } ;
+
+ templen -= count ;
+ } ;
+ } ;
+
+ return len ;
+} /* interleave_read_short */
+
+static sf_count_t
+interleave_read_int (SF_PRIVATE *psf, int *ptr, sf_count_t len)
+{ INTERLEAVE_DATA *pdata ;
+ sf_count_t offset, templen ;
+ int chan, count, k ;
+ int *inptr, *outptr ;
+
+ if (! (pdata = psf->interleave))
+ return 0 ;
+
+ inptr = (int*) pdata->buffer ;
+
+ for (chan = 0 ; chan < psf->sf.channels ; chan++)
+ { outptr = ptr + chan ;
+
+ offset = psf->dataoffset + chan * psf->bytewidth * psf->read_current ;
+
+ if (psf_fseek (psf, offset, SEEK_SET) != offset)
+ { psf->error = SFE_INTERLEAVE_SEEK ;
+ return 0 ;
+ } ;
+
+ templen = len / psf->sf.channels ;
+
+ while (templen > 0)
+ { if (templen > SIGNED_SIZEOF (pdata->buffer) / SIGNED_SIZEOF (int))
+ count = SIGNED_SIZEOF (pdata->buffer) / SIGNED_SIZEOF (int) ;
+ else
+ count = (int) templen ;
+
+ if (pdata->read_int (psf, inptr, count) != count)
+ { psf->error = SFE_INTERLEAVE_READ ;
+ return 0 ;
+ } ;
+
+ for (k = 0 ; k < count ; k++)
+ { *outptr = inptr [k] ;
+ outptr += psf->sf.channels ;
+ } ;
+
+ templen -= count ;
+ } ;
+ } ;
+
+ return len ;
+} /* interleave_read_int */
+
+static sf_count_t
+interleave_read_float (SF_PRIVATE *psf, float *ptr, sf_count_t len)
+{ INTERLEAVE_DATA *pdata ;
+ sf_count_t offset, templen ;
+ int chan, count, k ;
+ float *inptr, *outptr ;
+
+ if (! (pdata = psf->interleave))
+ return 0 ;
+
+ inptr = (float*) pdata->buffer ;
+
+ for (chan = 0 ; chan < psf->sf.channels ; chan++)
+ { outptr = ptr + chan ;
+
+ offset = psf->dataoffset + pdata->channel_len * chan + psf->read_current * psf->bytewidth ;
+
+/*-printf ("chan : %d read_current : %6lld offset : %6lld\n", chan, psf->read_current, offset) ;-*/
+
+ if (psf_fseek (psf, offset, SEEK_SET) != offset)
+ { psf->error = SFE_INTERLEAVE_SEEK ;
+/*-puts ("interleave_seek error") ; exit (1) ;-*/
+ return 0 ;
+ } ;
+
+ templen = len / psf->sf.channels ;
+
+ while (templen > 0)
+ { if (templen > SIGNED_SIZEOF (pdata->buffer) / SIGNED_SIZEOF (float))
+ count = SIGNED_SIZEOF (pdata->buffer) / SIGNED_SIZEOF (float) ;
+ else
+ count = (int) templen ;
+
+ if (pdata->read_float (psf, inptr, count) != count)
+ { psf->error = SFE_INTERLEAVE_READ ;
+/*-puts ("interleave_read error") ; exit (1) ;-*/
+ return 0 ;
+ } ;
+
+ for (k = 0 ; k < count ; k++)
+ { *outptr = inptr [k] ;
+ outptr += psf->sf.channels ;
+ } ;
+
+ templen -= count ;
+ } ;
+ } ;
+
+ return len ;
+} /* interleave_read_float */
+
+static sf_count_t
+interleave_read_double (SF_PRIVATE *psf, double *ptr, sf_count_t len)
+{ INTERLEAVE_DATA *pdata ;
+ sf_count_t offset, templen ;
+ int chan, count, k ;
+ double *inptr, *outptr ;
+
+ if (! (pdata = psf->interleave))
+ return 0 ;
+
+ inptr = (double*) pdata->buffer ;
+
+ for (chan = 0 ; chan < psf->sf.channels ; chan++)
+ { outptr = ptr + chan ;
+
+ offset = psf->dataoffset + chan * psf->bytewidth * psf->read_current ;
+
+ if (psf_fseek (psf, offset, SEEK_SET) != offset)
+ { psf->error = SFE_INTERLEAVE_SEEK ;
+ return 0 ;
+ } ;
+
+ templen = len / psf->sf.channels ;
+
+ while (templen > 0)
+ { if (templen > SIGNED_SIZEOF (pdata->buffer) / SIGNED_SIZEOF (double))
+ count = SIGNED_SIZEOF (pdata->buffer) / SIGNED_SIZEOF (double) ;
+ else
+ count = (int) templen ;
+
+ if (pdata->read_double (psf, inptr, count) != count)
+ { psf->error = SFE_INTERLEAVE_READ ;
+ return 0 ;
+ } ;
+
+ for (k = 0 ; k < count ; k++)
+ { *outptr = inptr [k] ;
+ outptr += psf->sf.channels ;
+ } ;
+
+ templen -= count ;
+ } ;
+ } ;
+
+ return len ;
+} /* interleave_read_double */
+
+/*------------------------------------------------------------------------------
+*/
+
+static sf_count_t
+interleave_seek (SF_PRIVATE *psf, int mode, sf_count_t samples_from_start)
+{ psf = psf ; mode = mode ;
+
+ /*
+ ** Do nothing here. This is a place holder to prevent the default
+ ** seek function from being called.
+ */
+
+ return samples_from_start ;
+} /* interleave_seek */
+
projects / Faustine.git / blobdiff