+++ /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.
-*/
-
-/*
-** This is the OKI / Dialogic ADPCM encoder/decoder. It converts from
-** 12 bit linear sample data to a 4 bit ADPCM.
-*/
-
-/*
- * Note: some early Dialogic hardware does not always reset the ADPCM encoder
- * at the start of each vox file. This can result in clipping and/or DC offset
- * problems when it comes to decoding the audio. Whilst little can be done
- * about the clipping, a DC offset can be removed by passing the decoded audio
- * through a high-pass filter at e.g. 10Hz.
- */
-
-#include "sfconfig.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-
-#include "sndfile.h"
-#include "sfendian.h"
-#include "common.h"
-#include "ima_oki_adpcm.h"
-
-
-static sf_count_t vox_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
-static sf_count_t vox_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
-static sf_count_t vox_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
-static sf_count_t vox_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
-
-static sf_count_t vox_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ;
-static sf_count_t vox_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ;
-static sf_count_t vox_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ;
-static sf_count_t vox_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ;
-
-static int vox_read_block (SF_PRIVATE *psf, IMA_OKI_ADPCM *pvox, short *ptr, int len) ;
-
-/*------------------------------------------------------------------------------
-*/
-
-static int
-codec_close (SF_PRIVATE * psf)
-{
- IMA_OKI_ADPCM * p = (IMA_OKI_ADPCM *) psf->codec_data ;
-
- if (p->errors)
- psf_log_printf (psf, "*** Warning : ADPCM state errors: %d\n", p->errors) ;
- return p->errors ;
-} /* code_close */
-
-int
-vox_adpcm_init (SF_PRIVATE *psf)
-{ IMA_OKI_ADPCM *pvox = NULL ;
-
- if (psf->file.mode == SFM_RDWR)
- return SFE_BAD_MODE_RW ;
-
- if (psf->file.mode == SFM_WRITE && psf->sf.channels != 1)
- return SFE_CHANNEL_COUNT ;
-
- if ((pvox = malloc (sizeof (IMA_OKI_ADPCM))) == NULL)
- return SFE_MALLOC_FAILED ;
-
- psf->codec_data = (void*) pvox ;
- memset (pvox, 0, sizeof (IMA_OKI_ADPCM)) ;
-
- if (psf->file.mode == SFM_WRITE)
- { psf->write_short = vox_write_s ;
- psf->write_int = vox_write_i ;
- psf->write_float = vox_write_f ;
- psf->write_double = vox_write_d ;
- }
- else
- { psf_log_printf (psf, "Header-less OKI Dialogic ADPCM encoded file.\n") ;
- psf_log_printf (psf, "Setting up for 8kHz, mono, Vox ADPCM.\n") ;
-
- psf->read_short = vox_read_s ;
- psf->read_int = vox_read_i ;
- psf->read_float = vox_read_f ;
- psf->read_double = vox_read_d ;
- } ;
-
- /* Standard sample rate chennels etc. */
- if (psf->sf.samplerate < 1)
- psf->sf.samplerate = 8000 ;
- psf->sf.channels = 1 ;
-
- psf->sf.frames = psf->filelength * 2 ;
-
- psf->sf.seekable = SF_FALSE ;
- psf->codec_close = codec_close ;
-
- /* Seek back to start of data. */
- if (psf_fseek (psf, 0 , SEEK_SET) == -1)
- return SFE_BAD_SEEK ;
-
- ima_oki_adpcm_init (pvox, IMA_OKI_ADPCM_TYPE_OKI) ;
-
- return 0 ;
-} /* vox_adpcm_init */
-
-/*==============================================================================
-*/
-
-static int
-vox_read_block (SF_PRIVATE *psf, IMA_OKI_ADPCM *pvox, short *ptr, int len)
-{ int indx = 0, k ;
-
- while (indx < len)
- { pvox->code_count = (len - indx > IMA_OKI_ADPCM_PCM_LEN) ? IMA_OKI_ADPCM_CODE_LEN : (len - indx + 1) / 2 ;
-
- if ((k = psf_fread (pvox->codes, 1, pvox->code_count, psf)) != pvox->code_count)
- { if (psf_ftell (psf) != psf->filelength)
- psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, pvox->code_count) ;
- if (k == 0)
- break ;
- } ;
-
- pvox->code_count = k ;
-
- ima_oki_adpcm_decode_block (pvox) ;
-
- memcpy (&(ptr [indx]), pvox->pcm, pvox->pcm_count * sizeof (short)) ;
- indx += pvox->pcm_count ;
- } ;
-
- return indx ;
-} /* vox_read_block */
-
-
-static sf_count_t
-vox_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len)
-{ IMA_OKI_ADPCM *pvox ;
- int readcount, count ;
- sf_count_t total = 0 ;
-
- if (! psf->codec_data)
- return 0 ;
- pvox = (IMA_OKI_ADPCM*) psf->codec_data ;
-
- while (len > 0)
- { readcount = (len > 0x10000000) ? 0x10000000 : (int) len ;
-
- count = vox_read_block (psf, pvox, ptr, readcount) ;
-
- total += count ;
- len -= count ;
- if (count != readcount)
- break ;
- } ;
-
- return total ;
-} /* vox_read_s */
-
-static sf_count_t
-vox_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len)
-{ IMA_OKI_ADPCM *pvox ;
- short *sptr ;
- int k, bufferlen, readcount, count ;
- sf_count_t total = 0 ;
-
- if (! psf->codec_data)
- return 0 ;
- pvox = (IMA_OKI_ADPCM*) psf->codec_data ;
-
- sptr = psf->u.sbuf ;
- bufferlen = ARRAY_LEN (psf->u.sbuf) ;
- while (len > 0)
- { readcount = (len >= bufferlen) ? bufferlen : (int) len ;
- count = vox_read_block (psf, pvox, sptr, readcount) ;
- for (k = 0 ; k < readcount ; k++)
- ptr [total + k] = ((int) sptr [k]) << 16 ;
- total += count ;
- len -= readcount ;
- if (count != readcount)
- break ;
- } ;
-
- return total ;
-} /* vox_read_i */
-
-static sf_count_t
-vox_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len)
-{ IMA_OKI_ADPCM *pvox ;
- short *sptr ;
- int k, bufferlen, readcount, count ;
- sf_count_t total = 0 ;
- float normfact ;
-
- if (! psf->codec_data)
- return 0 ;
- pvox = (IMA_OKI_ADPCM*) psf->codec_data ;
-
- normfact = (psf->norm_float == SF_TRUE) ? 1.0 / ((float) 0x8000) : 1.0 ;
-
- sptr = psf->u.sbuf ;
- bufferlen = ARRAY_LEN (psf->u.sbuf) ;
- while (len > 0)
- { readcount = (len >= bufferlen) ? bufferlen : (int) len ;
- count = vox_read_block (psf, pvox, sptr, readcount) ;
- for (k = 0 ; k < readcount ; k++)
- ptr [total + k] = normfact * (float) (sptr [k]) ;
- total += count ;
- len -= readcount ;
- if (count != readcount)
- break ;
- } ;
-
- return total ;
-} /* vox_read_f */
-
-static sf_count_t
-vox_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len)
-{ IMA_OKI_ADPCM *pvox ;
- short *sptr ;
- int k, bufferlen, readcount, count ;
- sf_count_t total = 0 ;
- double normfact ;
-
- if (! psf->codec_data)
- return 0 ;
- pvox = (IMA_OKI_ADPCM*) psf->codec_data ;
-
- normfact = (psf->norm_double == SF_TRUE) ? 1.0 / ((double) 0x8000) : 1.0 ;
-
- sptr = psf->u.sbuf ;
- bufferlen = ARRAY_LEN (psf->u.sbuf) ;
- while (len > 0)
- { readcount = (len >= bufferlen) ? bufferlen : (int) len ;
- count = vox_read_block (psf, pvox, sptr, readcount) ;
- for (k = 0 ; k < readcount ; k++)
- ptr [total + k] = normfact * (double) (sptr [k]) ;
- total += count ;
- len -= readcount ;
- if (count != readcount)
- break ;
- } ;
-
- return total ;
-} /* vox_read_d */
-
-/*------------------------------------------------------------------------------
-*/
-
-static int
-vox_write_block (SF_PRIVATE *psf, IMA_OKI_ADPCM *pvox, const short *ptr, int len)
-{ int indx = 0, k ;
-
- while (indx < len)
- { pvox->pcm_count = (len - indx > IMA_OKI_ADPCM_PCM_LEN) ? IMA_OKI_ADPCM_PCM_LEN : len - indx ;
-
- memcpy (pvox->pcm, &(ptr [indx]), pvox->pcm_count * sizeof (short)) ;
-
- ima_oki_adpcm_encode_block (pvox) ;
-
- if ((k = psf_fwrite (pvox->codes, 1, pvox->code_count, psf)) != pvox->code_count)
- psf_log_printf (psf, "*** Warning : short write (%d != %d).\n", k, pvox->code_count) ;
-
- indx += pvox->pcm_count ;
- } ;
-
- return indx ;
-} /* vox_write_block */
-
-static sf_count_t
-vox_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len)
-{ IMA_OKI_ADPCM *pvox ;
- int writecount, count ;
- sf_count_t total = 0 ;
-
- if (! psf->codec_data)
- return 0 ;
- pvox = (IMA_OKI_ADPCM*) psf->codec_data ;
-
- while (len)
- { writecount = (len > 0x10000000) ? 0x10000000 : (int) len ;
-
- count = vox_write_block (psf, pvox, ptr, writecount) ;
-
- total += count ;
- len -= count ;
- if (count != writecount)
- break ;
- } ;
-
- return total ;
-} /* vox_write_s */
-
-static sf_count_t
-vox_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len)
-{ IMA_OKI_ADPCM *pvox ;
- short *sptr ;
- int k, bufferlen, writecount, count ;
- sf_count_t total = 0 ;
-
- if (! psf->codec_data)
- return 0 ;
- pvox = (IMA_OKI_ADPCM*) psf->codec_data ;
-
- sptr = psf->u.sbuf ;
- bufferlen = ARRAY_LEN (psf->u.sbuf) ;
- while (len > 0)
- { writecount = (len >= bufferlen) ? bufferlen : (int) len ;
- for (k = 0 ; k < writecount ; k++)
- sptr [k] = ptr [total + k] >> 16 ;
- count = vox_write_block (psf, pvox, sptr, writecount) ;
- total += count ;
- len -= writecount ;
- if (count != writecount)
- break ;
- } ;
-
- return total ;
-} /* vox_write_i */
-
-static sf_count_t
-vox_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len)
-{ IMA_OKI_ADPCM *pvox ;
- short *sptr ;
- int k, bufferlen, writecount, count ;
- sf_count_t total = 0 ;
- float normfact ;
-
- if (! psf->codec_data)
- return 0 ;
- pvox = (IMA_OKI_ADPCM*) psf->codec_data ;
-
- normfact = (psf->norm_float == SF_TRUE) ? (1.0 * 0x7FFF) : 1.0 ;
-
- sptr = psf->u.sbuf ;
- bufferlen = ARRAY_LEN (psf->u.sbuf) ;
- while (len > 0)
- { writecount = (len >= bufferlen) ? bufferlen : (int) len ;
- for (k = 0 ; k < writecount ; k++)
- sptr [k] = lrintf (normfact * ptr [total + k]) ;
- count = vox_write_block (psf, pvox, sptr, writecount) ;
- total += count ;
- len -= writecount ;
- if (count != writecount)
- break ;
- } ;
-
- return total ;
-} /* vox_write_f */
-
-static sf_count_t
-vox_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len)
-{ IMA_OKI_ADPCM *pvox ;
- short *sptr ;
- int k, bufferlen, writecount, count ;
- sf_count_t total = 0 ;
- double normfact ;
-
- if (! psf->codec_data)
- return 0 ;
- pvox = (IMA_OKI_ADPCM*) psf->codec_data ;
-
- normfact = (psf->norm_double == SF_TRUE) ? (1.0 * 0x7FFF) : 1.0 ;
-
- sptr = psf->u.sbuf ;
- bufferlen = ARRAY_LEN (psf->u.sbuf) ;
- while (len > 0)
- { writecount = (len >= bufferlen) ? bufferlen : (int) len ;
- for (k = 0 ; k < writecount ; k++)
- sptr [k] = lrint (normfact * ptr [total + k]) ;
- count = vox_write_block (psf, pvox, sptr, writecount) ;
- total += count ;
- len -= writecount ;
- if (count != writecount)
- break ;
- } ;
-
- return total ;
-} /* vox_write_d */
-
projects / Faustine.git / blobdiff
