/* ** Copyright (C) 1999-2011 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. */ #include "sfconfig.h" #include #include "sndfile.h" #include "common.h" static sf_count_t alaw_read_alaw2s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ; static sf_count_t alaw_read_alaw2i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ; static sf_count_t alaw_read_alaw2f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ; static sf_count_t alaw_read_alaw2d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ; static sf_count_t alaw_write_s2alaw (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ; static sf_count_t alaw_write_i2alaw (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ; static sf_count_t alaw_write_f2alaw (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ; static sf_count_t alaw_write_d2alaw (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ; static void alaw2s_array (unsigned char *buffer, int count, short *ptr) ; static void alaw2i_array (unsigned char *buffer, int count, int *ptr) ; static void alaw2f_array (unsigned char *buffer, int count, float *ptr, float normfact) ; static void alaw2d_array (unsigned char *buffer, int count, double *ptr, double normfact) ; static void s2alaw_array (const short *buffer, int count, unsigned char *ptr) ; static void i2alaw_array (const int *buffer, int count, unsigned char *ptr) ; static void f2alaw_array (const float *buffer, int count, unsigned char *ptr, float normfact) ; static void d2alaw_array (const double *buffer, int count, unsigned char *ptr, double normfact) ; int alaw_init (SF_PRIVATE *psf) { if (psf->file.mode == SFM_READ || psf->file.mode == SFM_RDWR) { psf->read_short = alaw_read_alaw2s ; psf->read_int = alaw_read_alaw2i ; psf->read_float = alaw_read_alaw2f ; psf->read_double = alaw_read_alaw2d ; } ; if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) { psf->write_short = alaw_write_s2alaw ; psf->write_int = alaw_write_i2alaw ; psf->write_float = alaw_write_f2alaw ; psf->write_double = alaw_write_d2alaw ; } ; psf->bytewidth = 1 ; psf->blockwidth = psf->sf.channels ; if (psf->filelength > psf->dataoffset) psf->datalength = (psf->dataend) ? psf->dataend - psf->dataoffset : psf->filelength - psf->dataoffset ; else psf->datalength = 0 ; psf->sf.frames = psf->blockwidth > 0 ? psf->datalength / psf->blockwidth : 0 ; return 0 ; } /* alaw_init */ /*============================================================================== * Private static functions and data. */ static short alaw_decode [256] = { -5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736, -7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784, -2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368, -3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392, -22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944, -30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136, -11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472, -15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568, -344, -328, -376, -360, -280, -264, -312, -296, -472, -456, -504, -488, -408, -392, -440, -424, -88, -72, -120, -104, -24, -8, -56, -40, -216, -200, -248, -232, -152, -136, -184, -168, -1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184, -1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696, -688, -656, -752, -720, -560, -528, -624, -592, -944, -912, -1008, -976, -816, -784, -880, -848, 5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736, 7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784, 2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368, 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392, 22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944, 30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136, 11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472, 15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568, 344, 328, 376, 360, 280, 264, 312, 296, 472, 456, 504, 488, 408, 392, 440, 424, 88, 72, 120, 104, 24, 8, 56, 40, 216, 200, 248, 232, 152, 136, 184, 168, 1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184, 1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696, 688, 656, 752, 720, 560, 528, 624, 592, 944, 912, 1008, 976, 816, 784, 880, 848 } ; /* alaw_decode */ static unsigned char alaw_encode [2048 + 1] = { 0xd5, 0xd4, 0xd7, 0xd6, 0xd1, 0xd0, 0xd3, 0xd2, 0xdd, 0xdc, 0xdf, 0xde, 0xd9, 0xd8, 0xdb, 0xda, 0xc5, 0xc4, 0xc7, 0xc6, 0xc1, 0xc0, 0xc3, 0xc2, 0xcd, 0xcc, 0xcf, 0xce, 0xc9, 0xc8, 0xcb, 0xca, 0xf5, 0xf5, 0xf4, 0xf4, 0xf7, 0xf7, 0xf6, 0xf6, 0xf1, 0xf1, 0xf0, 0xf0, 0xf3, 0xf3, 0xf2, 0xf2, 0xfd, 0xfd, 0xfc, 0xfc, 0xff, 0xff, 0xfe, 0xfe, 0xf9, 0xf9, 0xf8, 0xf8, 0xfb, 0xfb, 0xfa, 0xfa, 0xe5, 0xe5, 0xe5, 0xe5, 0xe4, 0xe4, 0xe4, 0xe4, 0xe7, 0xe7, 0xe7, 0xe7, 0xe6, 0xe6, 0xe6, 0xe6, 0xe1, 0xe1, 0xe1, 0xe1, 0xe0, 0xe0, 0xe0, 0xe0, 0xe3, 0xe3, 0xe3, 0xe3, 0xe2, 0xe2, 0xe2, 0xe2, 0xed, 0xed, 0xed, 0xed, 0xec, 0xec, 0xec, 0xec, 0xef, 0xef, 0xef, 0xef, 0xee, 0xee, 0xee, 0xee, 0xe9, 0xe9, 0xe9, 0xe9, 0xe8, 0xe8, 0xe8, 0xe8, 0xeb, 0xeb, 0xeb, 0xeb, 0xea, 0xea, 0xea, 0xea, 0x95, 0x95, 0x95, 0x95, 0x95, 0x95, 0x95, 0x95, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x97, 0x97, 0x97, 0x97, 0x97, 0x97, 0x97, 0x97, 0x96, 0x96, 0x96, 0x96, 0x96, 0x96, 0x96, 0x96, 0x91, 0x91, 0x91, 0x91, 0x91, 0x91, 0x91, 0x91, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x93, 0x93, 0x93, 0x93, 0x93, 0x93, 0x93, 0x93, 0x92, 0x92, 0x92, 0x92, 0x92, 0x92, 0x92, 0x92, 0x9d, 0x9d, 0x9d, 0x9d, 0x9d, 0x9d, 0x9d, 0x9d, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9f, 0x9f, 0x9f, 0x9f, 0x9f, 0x9f, 0x9f, 0x9f, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x9b, 0x9b, 0x9b, 0x9b, 0x9b, 0x9b, 0x9b, 0x9b, 0x9a, 0x9a, 0x9a, 0x9a, 0x9a, 0x9a, 0x9a, 0x9a, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x87, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x86, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8d, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8c, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x8e, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x89, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8b, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0x8a, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb5, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 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0xb2, 0xb2, 0xb2, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xb8, 0xb8, 0xb8, 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*ptr) { while (--count >= 0) ptr [count] = alaw_decode [(int) buffer [count]] << 16 ; } /* alaw2i_array */ static inline void alaw2f_array (unsigned char *buffer, int count, float *ptr, float normfact) { while (--count >= 0) ptr [count] = normfact * alaw_decode [(int) buffer [count]] ; } /* alaw2f_array */ static inline void alaw2d_array (unsigned char *buffer, int count, double *ptr, double normfact) { while (--count >= 0) ptr [count] = normfact * alaw_decode [(int) buffer [count]] ; } /* alaw2d_array */ static inline void s2alaw_array (const short *ptr, int count, unsigned char *buffer) { while (--count >= 0) { if (ptr [count] >= 0) buffer [count] = alaw_encode [ptr [count] / 16] ; else buffer [count] = 0x7F & alaw_encode [ptr [count] / -16] ; } ; } /* s2alaw_array */ static inline void i2alaw_array (const int *ptr, int count, unsigned char *buffer) { while (--count >= 0) { if (ptr [count] >= 0) buffer [count] = alaw_encode [ptr [count] >> (16 + 4)] ; else buffer [count] = 0x7F & alaw_encode [- ptr [count] >> (16 + 4)] ; } ; } /* i2alaw_array */ static inline void f2alaw_array (const float *ptr, int count, unsigned char *buffer, float normfact) { while (--count >= 0) { if (ptr [count] >= 0) buffer [count] = alaw_encode [lrintf (normfact * ptr [count])] ; else buffer [count] = 0x7F & alaw_encode [- lrintf (normfact * ptr [count])] ; } ; } /* f2alaw_array */ static inline void d2alaw_array (const double *ptr, int count, unsigned char *buffer, double normfact) { while (--count >= 0) { if (ptr [count] >= 0) buffer [count] = alaw_encode [lrint (normfact * ptr [count])] ; else buffer [count] = 0x7F & alaw_encode [- lrint (normfact * ptr [count])] ; } ; } /* d2alaw_array */ /*============================================================================== */ static sf_count_t alaw_read_alaw2s (SF_PRIVATE *psf, short *ptr, sf_count_t len) { int bufferlen, readcount ; sf_count_t total = 0 ; bufferlen = ARRAY_LEN (psf->u.ucbuf) ; while (len > 0) { if (len < bufferlen) bufferlen = (int) len ; readcount = psf_fread (psf->u.ucbuf, 1, bufferlen, psf) ; alaw2s_array (psf->u.ucbuf, readcount, ptr + total) ; total += readcount ; if (readcount < bufferlen) break ; len -= readcount ; } ; return total ; } /* alaw_read_alaw2s */ static sf_count_t alaw_read_alaw2i (SF_PRIVATE *psf, int *ptr, sf_count_t len) { int bufferlen, readcount ; sf_count_t total = 0 ; bufferlen = ARRAY_LEN (psf->u.ucbuf) ; while (len > 0) { if (len < bufferlen) bufferlen = (int) len ; readcount = psf_fread (psf->u.ucbuf, 1, bufferlen, psf) ; alaw2i_array (psf->u.ucbuf, readcount, ptr + total) ; total += readcount ; if (readcount < bufferlen) break ; len -= readcount ; } ; return total ; } /* alaw_read_alaw2i */ static sf_count_t alaw_read_alaw2f (SF_PRIVATE *psf, float *ptr, sf_count_t len) { int bufferlen, readcount ; sf_count_t total = 0 ; float normfact ; normfact = (psf->norm_float == SF_TRUE) ? 1.0 / ((float) 0x8000) : 1.0 ; bufferlen = ARRAY_LEN (psf->u.ucbuf) ; while (len > 0) { if (len < bufferlen) bufferlen = (int) len ; readcount = psf_fread (psf->u.ucbuf, 1, bufferlen, psf) ; alaw2f_array (psf->u.ucbuf, readcount, ptr + total, normfact) ; total += readcount ; if (readcount < bufferlen) break ; len -= readcount ; } ; return total ; } /* alaw_read_alaw2f */ static sf_count_t alaw_read_alaw2d (SF_PRIVATE *psf, double *ptr, sf_count_t len) { int bufferlen, readcount ; sf_count_t total = 0 ; double normfact ; normfact = (psf->norm_double) ? 1.0 / ((double) 0x8000) : 1.0 ; bufferlen = ARRAY_LEN (psf->u.ucbuf) ; while (len > 0) { if (len < bufferlen) bufferlen = (int) len ; readcount = psf_fread (psf->u.ucbuf, 1, bufferlen, psf) ; alaw2d_array (psf->u.ucbuf, readcount, ptr + total, normfact) ; total += readcount ; if (readcount < bufferlen) break ; len -= readcount ; } ; return total ; } /* alaw_read_alaw2d */ /*============================================================================================= */ static sf_count_t alaw_write_s2alaw (SF_PRIVATE *psf, const short *ptr, sf_count_t len) { int bufferlen, writecount ; sf_count_t total = 0 ; bufferlen = ARRAY_LEN (psf->u.ucbuf) ; while (len > 0) { if (len < bufferlen) bufferlen = (int) len ; s2alaw_array (ptr + total, bufferlen, psf->u.ucbuf) ; writecount = psf_fwrite (psf->u.ucbuf, 1, bufferlen, psf) ; total += writecount ; if (writecount < bufferlen) break ; len -= writecount ; } ; return total ; } /* alaw_write_s2alaw */ static sf_count_t alaw_write_i2alaw (SF_PRIVATE *psf, const int *ptr, sf_count_t len) { int bufferlen, writecount ; sf_count_t total = 0 ; bufferlen = ARRAY_LEN (psf->u.ucbuf) ; while (len > 0) { if (len < bufferlen) bufferlen = (int) len ; i2alaw_array (ptr + total, bufferlen, psf->u.ucbuf) ; writecount = psf_fwrite (psf->u.ucbuf, 1, bufferlen, psf) ; total += writecount ; if (writecount < bufferlen) break ; len -= writecount ; } ; return total ; } /* alaw_write_i2alaw */ static sf_count_t alaw_write_f2alaw (SF_PRIVATE *psf, const float *ptr, sf_count_t len) { int bufferlen, writecount ; sf_count_t total = 0 ; float normfact ; normfact = (psf->norm_float == SF_TRUE) ? (1.0 * 0x7FFF) / 16.0 : 1.0 / 16 ; bufferlen = ARRAY_LEN (psf->u.ucbuf) ; while (len > 0) { if (len < bufferlen) bufferlen = (int) len ; f2alaw_array (ptr + total, bufferlen, psf->u.ucbuf, normfact) ; writecount = psf_fwrite (psf->u.ucbuf, 1, bufferlen, psf) ; total += writecount ; if (writecount < bufferlen) break ; len -= writecount ; } ; return total ; } /* alaw_write_f2alaw */ static sf_count_t alaw_write_d2alaw (SF_PRIVATE *psf, const double *ptr, sf_count_t len) { int bufferlen, writecount ; sf_count_t total = 0 ; double normfact ; normfact = (psf->norm_double) ? (1.0 * 0x7FFF) / 16.0 : 1.0 / 16.0 ; bufferlen = ARRAY_LEN (psf->u.ucbuf) ; while (len > 0) { if (len < bufferlen) bufferlen = (int) len ; d2alaw_array (ptr + total, bufferlen, psf->u.ucbuf, normfact) ; writecount = psf_fwrite (psf->u.ucbuf, 1, bufferlen, psf) ; total += writecount ; if (writecount < bufferlen) break ; len -= writecount ; } ; return total ; } /* alaw_write_d2alaw */