X-Git-Url: https://scm.cri.ensmp.fr/git/Faustine.git/blobdiff_plain/1059e1cc0c2ecfa237406949aa26155b6a5b9154..66f23d4fabf89ad09adbd4dfc15ac6b5b2b7da83:/interpreter/lib/src/libsndfile-1.0.25/src/vox_adpcm.c diff --git a/interpreter/lib/src/libsndfile-1.0.25/src/vox_adpcm.c b/interpreter/lib/src/libsndfile-1.0.25/src/vox_adpcm.c new file mode 100644 index 0000000..579a5d0 --- /dev/null +++ b/interpreter/lib/src/libsndfile-1.0.25/src/vox_adpcm.c @@ -0,0 +1,394 @@ +/* +** Copyright (C) 2002-2011 Erik de Castro Lopo +** +** 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 +#include +#include +#include + +#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 */ +