--- /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