| /* |
| ** 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 */ |
| |