+++ /dev/null
-/*
-** Copyright (C) 1999-2011 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 "sfconfig.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-
-#include "sndfile.h"
-#include "sfendian.h"
-#include "common.h"
-
-typedef struct IMA_ADPCM_PRIVATE_tag
-{ int (*decode_block) (SF_PRIVATE *psf, struct IMA_ADPCM_PRIVATE_tag *pima) ;
- int (*encode_block) (SF_PRIVATE *psf, struct IMA_ADPCM_PRIVATE_tag *pima) ;
-
- int channels, blocksize, samplesperblock, blocks ;
- int blockcount, samplecount ;
- int previous [2] ;
- int stepindx [2] ;
- unsigned char *block ;
- short *samples ;
-#if HAVE_FLEXIBLE_ARRAY
- short data [] ; /* ISO C99 struct flexible array. */
-#else
- short data [0] ; /* This is a hack and might not work. */
-#endif
-} IMA_ADPCM_PRIVATE ;
-
-/*============================================================================================
-** Predefined IMA ADPCM data.
-*/
-
-static int ima_indx_adjust [16] =
-{ -1, -1, -1, -1, /* +0 - +3, decrease the step size */
- 2, 4, 6, 8, /* +4 - +7, increase the step size */
- -1, -1, -1, -1, /* -0 - -3, decrease the step size */
- 2, 4, 6, 8, /* -4 - -7, increase the step size */
-} ;
-
-static int ima_step_size [89] =
-{ 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
- 50, 55, 60, 66, 73, 80, 88, 97, 107, 118, 130, 143, 157, 173, 190, 209, 230,
- 253, 279, 307, 337, 371, 408, 449, 494, 544, 598, 658, 724, 796, 876, 963,
- 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066, 2272, 2499, 2749, 3024, 3327,
- 3660, 4026, 4428, 4871, 5358, 5894, 6484, 7132, 7845, 8630, 9493, 10442,
- 11487, 12635, 13899, 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794,
- 32767
-} ;
-
-static int ima_reader_init (SF_PRIVATE *psf, int blockalign, int samplesperblock) ;
-static int ima_writer_init (SF_PRIVATE *psf, int blockalign) ;
-
-static int ima_read_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima, short *ptr, int len) ;
-static int ima_write_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima, const short *ptr, int len) ;
-
-static sf_count_t ima_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
-static sf_count_t ima_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
-static sf_count_t ima_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
-static sf_count_t ima_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
-
-static sf_count_t ima_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ;
-static sf_count_t ima_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ;
-static sf_count_t ima_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ;
-static sf_count_t ima_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ;
-
-static sf_count_t ima_seek (SF_PRIVATE *psf, int mode, sf_count_t offset) ;
-
-static int ima_close (SF_PRIVATE *psf) ;
-
-static int wav_w64_ima_decode_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima) ;
-static int wav_w64_ima_encode_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima) ;
-
-/*-static int aiff_ima_reader_init (SF_PRIVATE *psf, int blockalign, int samplesperblock) ;-*/
-static int aiff_ima_decode_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima) ;
-static int aiff_ima_encode_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima) ;
-
-
-static inline int
-clamp_ima_step_index (int indx)
-{ if (indx < 0)
- return 0 ;
- if (indx >= ARRAY_LEN (ima_step_size))
- return ARRAY_LEN (ima_step_size) - 1 ;
-
- return indx ;
-} /* clamp_ima_step_index */
-
-/*============================================================================================
-** IMA ADPCM Reader initialisation function.
-*/
-
-int
-wav_w64_ima_init (SF_PRIVATE *psf, int blockalign, int samplesperblock)
-{ int error ;
-
- if (psf->codec_data != NULL)
- { psf_log_printf (psf, "*** psf->codec_data is not NULL.\n") ;
- return SFE_INTERNAL ;
- } ;
-
- if (psf->file.mode == SFM_RDWR)
- return SFE_BAD_MODE_RW ;
-
- if (psf->file.mode == SFM_READ)
- if ((error = ima_reader_init (psf, blockalign, samplesperblock)))
- return error ;
-
- if (psf->file.mode == SFM_WRITE)
- if ((error = ima_writer_init (psf, blockalign)))
- return error ;
-
- psf->codec_close = ima_close ;
- psf->seek = ima_seek ;
-
- return 0 ;
-} /* wav_w64_ima_init */
-
-int
-aiff_ima_init (SF_PRIVATE *psf, int blockalign, int samplesperblock)
-{ int error ;
-
- if (psf->file.mode == SFM_RDWR)
- return SFE_BAD_MODE_RW ;
-
- if (psf->file.mode == SFM_READ)
- if ((error = ima_reader_init (psf, blockalign, samplesperblock)))
- return error ;
-
- if (psf->file.mode == SFM_WRITE)
- if ((error = ima_writer_init (psf, blockalign)))
- return error ;
-
- psf->codec_close = ima_close ;
-
- return 0 ;
-} /* aiff_ima_init */
-
-static int
-ima_close (SF_PRIVATE *psf)
-{ IMA_ADPCM_PRIVATE *pima ;
-
- pima = (IMA_ADPCM_PRIVATE*) psf->codec_data ;
-
- if (psf->file.mode == SFM_WRITE)
- { /* If a block has been partially assembled, write it out
- ** as the final block.
- */
- if (pima->samplecount && pima->samplecount < pima->samplesperblock)
- pima->encode_block (psf, pima) ;
-
- psf->sf.frames = pima->samplesperblock * pima->blockcount / psf->sf.channels ;
- } ;
-
- return 0 ;
-} /* ima_close */
-
-/*============================================================================================
-** IMA ADPCM Read Functions.
-*/
-
-static int
-ima_reader_init (SF_PRIVATE *psf, int blockalign, int samplesperblock)
-{ IMA_ADPCM_PRIVATE *pima ;
- int pimasize, count ;
-
- if (psf->file.mode != SFM_READ)
- return SFE_BAD_MODE_RW ;
-
- pimasize = sizeof (IMA_ADPCM_PRIVATE) + blockalign * psf->sf.channels + 3 * psf->sf.channels * samplesperblock ;
-
- if (! (pima = calloc (1, pimasize)))
- return SFE_MALLOC_FAILED ;
-
- psf->codec_data = (void*) pima ;
-
- pima->samples = pima->data ;
- pima->block = (unsigned char*) (pima->data + samplesperblock * psf->sf.channels) ;
-
- pima->channels = psf->sf.channels ;
- pima->blocksize = blockalign ;
- pima->samplesperblock = samplesperblock ;
-
- psf->filelength = psf_get_filelen (psf) ;
- psf->datalength = (psf->dataend) ? psf->dataend - psf->dataoffset :
- psf->filelength - psf->dataoffset ;
-
- if (pima->blocksize == 0)
- { psf_log_printf (psf, "*** Error : pima->blocksize should not be zero.\n") ;
- return SFE_INTERNAL ;
- } ;
-
- if (psf->datalength % pima->blocksize)
- pima->blocks = psf->datalength / pima->blocksize + 1 ;
- else
- pima->blocks = psf->datalength / pima->blocksize ;
-
- switch (SF_CONTAINER (psf->sf.format))
- { case SF_FORMAT_WAV :
- case SF_FORMAT_W64 :
- count = 2 * (pima->blocksize - 4 * pima->channels) / pima->channels + 1 ;
-
- if (pima->samplesperblock != count)
- { psf_log_printf (psf, "*** Error : samplesperblock should be %d.\n", count) ;
- return SFE_INTERNAL ;
- } ;
-
- pima->decode_block = wav_w64_ima_decode_block ;
-
- psf->sf.frames = pima->samplesperblock * pima->blocks ;
- break ;
-
- case SF_FORMAT_AIFF :
- psf_log_printf (psf, "still need to check block count\n") ;
- pima->decode_block = aiff_ima_decode_block ;
- psf->sf.frames = pima->samplesperblock * pima->blocks / pima->channels ;
- break ;
-
- default :
- psf_log_printf (psf, "ima_reader_init: bad psf->sf.format\n") ;
- return SFE_INTERNAL ;
- } ;
-
- pima->decode_block (psf, pima) ; /* Read first block. */
-
- psf->read_short = ima_read_s ;
- psf->read_int = ima_read_i ;
- psf->read_float = ima_read_f ;
- psf->read_double = ima_read_d ;
-
- return 0 ;
-} /* ima_reader_init */
-
-static int
-aiff_ima_decode_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima)
-{ unsigned char *blockdata ;
- int chan, k, diff, bytecode, predictor ;
- short step, stepindx, *sampledata ;
-
-static int count = 0 ;
-count ++ ;
-
- pima->blockcount += pima->channels ;
- pima->samplecount = 0 ;
-
- if (pima->blockcount > pima->blocks)
- { memset (pima->samples, 0, pima->samplesperblock * pima->channels * sizeof (short)) ;
- return 1 ;
- } ;
-
- if ((k = psf_fread (pima->block, 1, pima->blocksize * pima->channels, psf)) != pima->blocksize * pima->channels)
- psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, pima->blocksize) ;
-
- /* Read and check the block header. */
- for (chan = 0 ; chan < pima->channels ; chan++)
- { blockdata = pima->block + chan * 34 ;
- sampledata = pima->samples + chan ;
-
- predictor = (blockdata [0] << 8) | (blockdata [1] & 0x80) ;
-
- stepindx = blockdata [1] & 0x7F ;
- stepindx = clamp_ima_step_index (stepindx) ;
-
- /*
- ** Pull apart the packed 4 bit samples and store them in their
- ** correct sample positions.
- */
- for (k = 0 ; k < pima->blocksize - 2 ; k++)
- { bytecode = blockdata [k + 2] ;
- sampledata [pima->channels * (2 * k + 0)] = bytecode & 0xF ;
- sampledata [pima->channels * (2 * k + 1)] = (bytecode >> 4) & 0xF ;
- } ;
-
- /* Decode the encoded 4 bit samples. */
- for (k = 0 ; k < pima->samplesperblock ; k ++)
- { step = ima_step_size [stepindx] ;
-
- bytecode = pima->samples [pima->channels * k + chan] ;
-
- stepindx += ima_indx_adjust [bytecode] ;
- stepindx = clamp_ima_step_index (stepindx) ;
-
- diff = step >> 3 ;
- if (bytecode & 1) diff += step >> 2 ;
- if (bytecode & 2) diff += step >> 1 ;
- if (bytecode & 4) diff += step ;
- if (bytecode & 8) diff = -diff ;
-
- predictor += diff ;
- if (predictor < -32768)
- predictor = -32768 ;
- else if (predictor > 32767)
- predictor = 32767 ;
-
- pima->samples [pima->channels * k + chan] = predictor ;
- } ;
- } ;
-
- return 1 ;
-} /* aiff_ima_decode_block */
-
-static int
-aiff_ima_encode_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima)
-{ int chan, k, step, diff, vpdiff, blockindx, indx ;
- short bytecode, mask ;
-
- /* Encode the block header. */
- for (chan = 0 ; chan < pima->channels ; chan ++)
- { blockindx = chan * pima->blocksize ;
-
- pima->block [blockindx] = (pima->samples [chan] >> 8) & 0xFF ;
- pima->block [blockindx + 1] = (pima->samples [chan] & 0x80) + (pima->stepindx [chan] & 0x7F) ;
-
- pima->previous [chan] = pima->samples [chan] ;
- } ;
-
- /* Encode second and later samples for every block as a 4 bit value. */
- for (k = pima->channels ; k < (pima->samplesperblock * pima->channels) ; k ++)
- { chan = (pima->channels > 1) ? (k % 2) : 0 ;
-
- diff = pima->samples [k] - pima->previous [chan] ;
-
- bytecode = 0 ;
- step = ima_step_size [pima->stepindx [chan]] ;
- vpdiff = step >> 3 ;
- if (diff < 0)
- { bytecode = 8 ;
- diff = -diff ;
- } ;
- mask = 4 ;
- while (mask)
- { if (diff >= step)
- { bytecode |= mask ;
- diff -= step ;
- vpdiff += step ;
- } ;
- step >>= 1 ;
- mask >>= 1 ;
- } ;
-
- if (bytecode & 8)
- pima->previous [chan] -= vpdiff ;
- else
- pima->previous [chan] += vpdiff ;
-
- if (pima->previous [chan] > 32767)
- pima->previous [chan] = 32767 ;
- else if (pima->previous [chan] < -32768)
- pima->previous [chan] = -32768 ;
-
- pima->stepindx [chan] += ima_indx_adjust [bytecode] ;
-
- pima->stepindx [chan] = clamp_ima_step_index (pima->stepindx [chan]) ;
- pima->samples [k] = bytecode ;
- } ;
-
- /* Pack the 4 bit encoded samples. */
-
- for (chan = 0 ; chan < pima->channels ; chan ++)
- { for (indx = pima->channels ; indx < pima->channels * pima->samplesperblock ; indx += 2 * pima->channels)
- { blockindx = chan * pima->blocksize + 2 + indx / 2 ;
-
- pima->block [blockindx] = pima->samples [indx] & 0x0F ;
- pima->block [blockindx] |= (pima->samples [indx + chan] << 4) & 0xF0 ;
- } ;
- } ;
-
- /* Write the block to disk. */
-
- if ((k = psf_fwrite (pima->block, 1, pima->channels * pima->blocksize, psf)) != pima->channels * pima->blocksize)
- psf_log_printf (psf, "*** Warning : short write (%d != %d).\n", k, pima->channels * pima->blocksize) ;
-
- memset (pima->samples, 0, pima->channels * pima->samplesperblock * sizeof (short)) ;
- pima->samplecount = 0 ;
- pima->blockcount ++ ;
-
- return 1 ;
-} /* aiff_ima_encode_block */
-
-static int
-wav_w64_ima_decode_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima)
-{ int chan, k, predictor, blockindx, indx, indxstart, diff ;
- short step, bytecode, stepindx [2] ;
-
- pima->blockcount ++ ;
- pima->samplecount = 0 ;
-
- if (pima->blockcount > pima->blocks)
- { memset (pima->samples, 0, pima->samplesperblock * pima->channels * sizeof (short)) ;
- return 1 ;
- } ;
-
- if ((k = psf_fread (pima->block, 1, pima->blocksize, psf)) != pima->blocksize)
- psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, pima->blocksize) ;
-
- /* Read and check the block header. */
-
- for (chan = 0 ; chan < pima->channels ; chan++)
- { predictor = pima->block [chan*4] | (pima->block [chan*4+1] << 8) ;
- if (predictor & 0x8000)
- predictor -= 0x10000 ;
-
- stepindx [chan] = pima->block [chan*4+2] ;
- stepindx [chan] = clamp_ima_step_index (stepindx [chan]) ;
-
-
- if (pima->block [chan*4+3] != 0)
- psf_log_printf (psf, "IMA ADPCM synchronisation error.\n") ;
-
- pima->samples [chan] = predictor ;
- } ;
-
- /*
- ** Pull apart the packed 4 bit samples and store them in their
- ** correct sample positions.
- */
-
- blockindx = 4 * pima->channels ;
-
- indxstart = pima->channels ;
- while (blockindx < pima->blocksize)
- { for (chan = 0 ; chan < pima->channels ; chan++)
- { indx = indxstart + chan ;
- for (k = 0 ; k < 4 ; k++)
- { bytecode = pima->block [blockindx++] ;
- pima->samples [indx] = bytecode & 0x0F ;
- indx += pima->channels ;
- pima->samples [indx] = (bytecode >> 4) & 0x0F ;
- indx += pima->channels ;
- } ;
- } ;
- indxstart += 8 * pima->channels ;
- } ;
-
- /* Decode the encoded 4 bit samples. */
-
- for (k = pima->channels ; k < (pima->samplesperblock * pima->channels) ; k ++)
- { chan = (pima->channels > 1) ? (k % 2) : 0 ;
-
- bytecode = pima->samples [k] & 0xF ;
-
- step = ima_step_size [stepindx [chan]] ;
- predictor = pima->samples [k - pima->channels] ;
-
- diff = step >> 3 ;
- if (bytecode & 1)
- diff += step >> 2 ;
- if (bytecode & 2)
- diff += step >> 1 ;
- if (bytecode & 4)
- diff += step ;
- if (bytecode & 8)
- diff = -diff ;
-
- predictor += diff ;
-
- if (predictor > 32767)
- predictor = 32767 ;
- else if (predictor < -32768)
- predictor = -32768 ;
-
- stepindx [chan] += ima_indx_adjust [bytecode] ;
- stepindx [chan] = clamp_ima_step_index (stepindx [chan]) ;
-
- pima->samples [k] = predictor ;
- } ;
-
- return 1 ;
-} /* wav_w64_ima_decode_block */
-
-static int
-wav_w64_ima_encode_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima)
-{ int chan, k, step, diff, vpdiff, blockindx, indx, indxstart ;
- short bytecode, mask ;
-
- /* Encode the block header. */
- for (chan = 0 ; chan < pima->channels ; chan++)
- { pima->block [chan*4] = pima->samples [chan] & 0xFF ;
- pima->block [chan*4+1] = (pima->samples [chan] >> 8) & 0xFF ;
-
- pima->block [chan*4+2] = pima->stepindx [chan] ;
- pima->block [chan*4+3] = 0 ;
-
- pima->previous [chan] = pima->samples [chan] ;
- } ;
-
- /* Encode the samples as 4 bit. */
-
- for (k = pima->channels ; k < (pima->samplesperblock * pima->channels) ; k ++)
- { chan = (pima->channels > 1) ? (k % 2) : 0 ;
-
- diff = pima->samples [k] - pima->previous [chan] ;
-
- bytecode = 0 ;
- step = ima_step_size [pima->stepindx [chan]] ;
- vpdiff = step >> 3 ;
- if (diff < 0)
- { bytecode = 8 ;
- diff = -diff ;
- } ;
- mask = 4 ;
- while (mask)
- { if (diff >= step)
- { bytecode |= mask ;
- diff -= step ;
- vpdiff += step ;
- } ;
- step >>= 1 ;
- mask >>= 1 ;
- } ;
-
- if (bytecode & 8)
- pima->previous [chan] -= vpdiff ;
- else
- pima->previous [chan] += vpdiff ;
-
- if (pima->previous [chan] > 32767)
- pima->previous [chan] = 32767 ;
- else if (pima->previous [chan] < -32768)
- pima->previous [chan] = -32768 ;
-
- pima->stepindx [chan] += ima_indx_adjust [bytecode] ;
- pima->stepindx [chan] = clamp_ima_step_index (pima->stepindx [chan]) ;
-
- pima->samples [k] = bytecode ;
- } ;
-
- /* Pack the 4 bit encoded samples. */
-
- blockindx = 4 * pima->channels ;
-
- indxstart = pima->channels ;
- while (blockindx < pima->blocksize)
- { for (chan = 0 ; chan < pima->channels ; chan++)
- { indx = indxstart + chan ;
- for (k = 0 ; k < 4 ; k++)
- { pima->block [blockindx] = pima->samples [indx] & 0x0F ;
- indx += pima->channels ;
- pima->block [blockindx] |= (pima->samples [indx] << 4) & 0xF0 ;
- indx += pima->channels ;
- blockindx ++ ;
- } ;
- } ;
- indxstart += 8 * pima->channels ;
- } ;
-
- /* Write the block to disk. */
-
- if ((k = psf_fwrite (pima->block, 1, pima->blocksize, psf)) != pima->blocksize)
- psf_log_printf (psf, "*** Warning : short write (%d != %d).\n", k, pima->blocksize) ;
-
- memset (pima->samples, 0, pima->samplesperblock * sizeof (short)) ;
- pima->samplecount = 0 ;
- pima->blockcount ++ ;
-
- return 1 ;
-} /* wav_w64_ima_encode_block */
-
-static int
-ima_read_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima, short *ptr, int len)
-{ int count, total = 0, indx = 0 ;
-
- while (indx < len)
- { if (pima->blockcount >= pima->blocks && pima->samplecount >= pima->samplesperblock)
- { memset (&(ptr [indx]), 0, (size_t) ((len - indx) * sizeof (short))) ;
- return total ;
- } ;
-
- if (pima->samplecount >= pima->samplesperblock)
- pima->decode_block (psf, pima) ;
-
- count = (pima->samplesperblock - pima->samplecount) * pima->channels ;
- count = (len - indx > count) ? count : len - indx ;
-
- memcpy (&(ptr [indx]), &(pima->samples [pima->samplecount * pima->channels]), count * sizeof (short)) ;
- indx += count ;
- pima->samplecount += count / pima->channels ;
- total = indx ;
- } ;
-
- return total ;
-} /* ima_read_block */
-
-static sf_count_t
-ima_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len)
-{ IMA_ADPCM_PRIVATE *pima ;
- int readcount, count ;
- sf_count_t total = 0 ;
-
- if (! psf->codec_data)
- return 0 ;
- pima = (IMA_ADPCM_PRIVATE*) psf->codec_data ;
-
- while (len > 0)
- { readcount = (len > 0x10000000) ? 0x10000000 : (int) len ;
-
- count = ima_read_block (psf, pima, ptr, readcount) ;
-
- total += count ;
- len -= count ;
- if (count != readcount)
- break ;
- } ;
-
- return total ;
-} /* ima_read_s */
-
-static sf_count_t
-ima_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len)
-{ IMA_ADPCM_PRIVATE *pima ;
- short *sptr ;
- int k, bufferlen, readcount, count ;
- sf_count_t total = 0 ;
-
- if (! psf->codec_data)
- return 0 ;
- pima = (IMA_ADPCM_PRIVATE*) psf->codec_data ;
-
- sptr = psf->u.sbuf ;
- bufferlen = ARRAY_LEN (psf->u.sbuf) ;
- while (len > 0)
- { readcount = (len >= bufferlen) ? bufferlen : (int) len ;
- count = ima_read_block (psf, pima, 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 ;
-} /* ima_read_i */
-
-static sf_count_t
-ima_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len)
-{ IMA_ADPCM_PRIVATE *pima ;
- short *sptr ;
- int k, bufferlen, readcount, count ;
- sf_count_t total = 0 ;
- float normfact ;
-
- if (! psf->codec_data)
- return 0 ;
- pima = (IMA_ADPCM_PRIVATE*) 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 = ima_read_block (psf, pima, 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 ;
-} /* ima_read_f */
-
-static sf_count_t
-ima_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len)
-{ IMA_ADPCM_PRIVATE *pima ;
- short *sptr ;
- int k, bufferlen, readcount, count ;
- sf_count_t total = 0 ;
- double normfact ;
-
- if (! psf->codec_data)
- return 0 ;
- pima = (IMA_ADPCM_PRIVATE*) 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 = ima_read_block (psf, pima, 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 ;
-} /* ima_read_d */
-
-static sf_count_t
-ima_seek (SF_PRIVATE *psf, int mode, sf_count_t offset)
-{ IMA_ADPCM_PRIVATE *pima ;
- int newblock, newsample ;
-
- if (! psf->codec_data)
- return 0 ;
- pima = (IMA_ADPCM_PRIVATE*) psf->codec_data ;
-
- if (psf->datalength < 0 || psf->dataoffset < 0)
- { psf->error = SFE_BAD_SEEK ;
- return PSF_SEEK_ERROR ;
- } ;
-
- if (offset == 0)
- { psf_fseek (psf, psf->dataoffset, SEEK_SET) ;
- pima->blockcount = 0 ;
- pima->decode_block (psf, pima) ;
- pima->samplecount = 0 ;
- return 0 ;
- } ;
-
- if (offset < 0 || offset > pima->blocks * pima->samplesperblock)
- { psf->error = SFE_BAD_SEEK ;
- return PSF_SEEK_ERROR ;
- } ;
-
- newblock = offset / pima->samplesperblock ;
- newsample = offset % pima->samplesperblock ;
-
- if (mode == SFM_READ)
- { psf_fseek (psf, psf->dataoffset + newblock * pima->blocksize, SEEK_SET) ;
- pima->blockcount = newblock ;
- pima->decode_block (psf, pima) ;
- pima->samplecount = newsample ;
- }
- else
- { /* What to do about write??? */
- psf->error = SFE_BAD_SEEK ;
- return PSF_SEEK_ERROR ;
- } ;
-
- return newblock * pima->samplesperblock + newsample ;
-} /* ima_seek */
-
-/*==========================================================================================
-** IMA ADPCM Write Functions.
-*/
-
-static int
-ima_writer_init (SF_PRIVATE *psf, int blockalign)
-{ IMA_ADPCM_PRIVATE *pima ;
- int samplesperblock ;
- unsigned int pimasize ;
-
- if (psf->file.mode != SFM_WRITE)
- return SFE_BAD_MODE_RW ;
-
- samplesperblock = 2 * (blockalign - 4 * psf->sf.channels) / psf->sf.channels + 1 ;
-
- pimasize = sizeof (IMA_ADPCM_PRIVATE) + blockalign + 3 * psf->sf.channels * samplesperblock ;
-
- if ((pima = calloc (1, pimasize)) == NULL)
- return SFE_MALLOC_FAILED ;
-
- psf->codec_data = (void*) pima ;
-
- pima->channels = psf->sf.channels ;
- pima->blocksize = blockalign ;
- pima->samplesperblock = samplesperblock ;
-
- pima->block = (unsigned char*) pima->data ;
- pima->samples = (short*) (pima->data + blockalign) ;
-
- pima->samplecount = 0 ;
-
- switch (SF_CONTAINER (psf->sf.format))
- { case SF_FORMAT_WAV :
- case SF_FORMAT_W64 :
- pima->encode_block = wav_w64_ima_encode_block ;
- break ;
-
- case SF_FORMAT_AIFF :
- pima->encode_block = aiff_ima_encode_block ;
- break ;
-
- default :
- psf_log_printf (psf, "ima_reader_init: bad psf->sf.format\n") ;
- return SFE_INTERNAL ;
- } ;
-
- psf->write_short = ima_write_s ;
- psf->write_int = ima_write_i ;
- psf->write_float = ima_write_f ;
- psf->write_double = ima_write_d ;
-
- return 0 ;
-} /* ima_writer_init */
-
-/*==========================================================================================
-*/
-
-static int
-ima_write_block (SF_PRIVATE *psf, IMA_ADPCM_PRIVATE *pima, const short *ptr, int len)
-{ int count, total = 0, indx = 0 ;
-
- while (indx < len)
- { count = (pima->samplesperblock - pima->samplecount) * pima->channels ;
-
- if (count > len - indx)
- count = len - indx ;
-
- memcpy (&(pima->samples [pima->samplecount * pima->channels]), &(ptr [total]), count * sizeof (short)) ;
- indx += count ;
- pima->samplecount += count / pima->channels ;
- total = indx ;
-
- if (pima->samplecount >= pima->samplesperblock)
- pima->encode_block (psf, pima) ;
- } ;
-
- return total ;
-} /* ima_write_block */
-
-static sf_count_t
-ima_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len)
-{ IMA_ADPCM_PRIVATE *pima ;
- int writecount, count ;
- sf_count_t total = 0 ;
-
- if (! psf->codec_data)
- return 0 ;
- pima = (IMA_ADPCM_PRIVATE*) psf->codec_data ;
-
- while (len)
- { writecount = (len > 0x10000000) ? 0x10000000 : (int) len ;
-
- count = ima_write_block (psf, pima, ptr, writecount) ;
-
- total += count ;
- len -= count ;
- if (count != writecount)
- break ;
- } ;
-
- return total ;
-} /* ima_write_s */
-
-static sf_count_t
-ima_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len)
-{ IMA_ADPCM_PRIVATE *pima ;
- short *sptr ;
- int k, bufferlen, writecount, count ;
- sf_count_t total = 0 ;
-
- if (! psf->codec_data)
- return 0 ;
- pima = (IMA_ADPCM_PRIVATE*) 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 = ima_write_block (psf, pima, sptr, writecount) ;
- total += count ;
- len -= writecount ;
- if (count != writecount)
- break ;
- } ;
-
- return total ;
-} /* ima_write_i */
-
-static sf_count_t
-ima_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len)
-{ IMA_ADPCM_PRIVATE *pima ;
- short *sptr ;
- int k, bufferlen, writecount, count ;
- sf_count_t total = 0 ;
- float normfact ;
-
- if (! psf->codec_data)
- return 0 ;
- pima = (IMA_ADPCM_PRIVATE*) 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 = ima_write_block (psf, pima, sptr, writecount) ;
- total += count ;
- len -= writecount ;
- if (count != writecount)
- break ;
- } ;
-
- return total ;
-} /* ima_write_f */
-
-static sf_count_t
-ima_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len)
-{ IMA_ADPCM_PRIVATE *pima ;
- short *sptr ;
- int k, bufferlen, writecount, count ;
- sf_count_t total = 0 ;
- double normfact ;
-
- if (! psf->codec_data)
- return 0 ;
- pima = (IMA_ADPCM_PRIVATE*) 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 = ima_write_block (psf, pima, sptr, writecount) ;
- total += count ;
- len -= writecount ;
- if (count != writecount)
- break ;
- } ;
-
- return total ;
-} /* ima_write_d */
-
projects / Faustine.git / blobdiff