--- /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"
+#include "G72x/g72x.h"
+
+/* This struct is private to the G72x code. */
+struct g72x_state ;
+typedef struct g72x_state G72x_STATE ;
+
+typedef struct
+{ /* Private data. Don't mess with it. */
+ struct g72x_state * private ;
+
+ /* Public data. Read only. */
+ int blocksize, samplesperblock, bytesperblock ;
+
+ /* Public data. Read and write. */
+ int blocks_total, block_curr, sample_curr ;
+ unsigned char block [G72x_BLOCK_SIZE] ;
+ short samples [G72x_BLOCK_SIZE] ;
+} G72x_PRIVATE ;
+
+static int psf_g72x_decode_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x) ;
+static int psf_g72x_encode_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x) ;
+
+static sf_count_t g72x_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
+static sf_count_t g72x_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
+static sf_count_t g72x_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
+static sf_count_t g72x_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
+
+static sf_count_t g72x_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ;
+static sf_count_t g72x_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ;
+static sf_count_t g72x_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ;
+static sf_count_t g72x_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ;
+
+static sf_count_t g72x_seek (SF_PRIVATE *psf, int mode, sf_count_t offset) ;
+
+static int g72x_close (SF_PRIVATE *psf) ;
+
+
+/*============================================================================================
+** WAV G721 Reader initialisation function.
+*/
+
+int
+g72x_init (SF_PRIVATE * psf)
+{ G72x_PRIVATE *pg72x ;
+ int bitspersample, bytesperblock, codec ;
+
+ if (psf->codec_data != NULL)
+ { psf_log_printf (psf, "*** psf->codec_data is not NULL.\n") ;
+ return SFE_INTERNAL ;
+ } ;
+
+ psf->sf.seekable = SF_FALSE ;
+
+ if (psf->sf.channels != 1)
+ return SFE_G72X_NOT_MONO ;
+
+ if ((pg72x = calloc (1, sizeof (G72x_PRIVATE))) == NULL)
+ return SFE_MALLOC_FAILED ;
+
+ psf->codec_data = (void*) pg72x ;
+
+ pg72x->block_curr = 0 ;
+ pg72x->sample_curr = 0 ;
+
+ switch (SF_CODEC (psf->sf.format))
+ { case SF_FORMAT_G721_32 :
+ codec = G721_32_BITS_PER_SAMPLE ;
+ bytesperblock = G721_32_BYTES_PER_BLOCK ;
+ bitspersample = G721_32_BITS_PER_SAMPLE ;
+ break ;
+
+ case SF_FORMAT_G723_24:
+ codec = G723_24_BITS_PER_SAMPLE ;
+ bytesperblock = G723_24_BYTES_PER_BLOCK ;
+ bitspersample = G723_24_BITS_PER_SAMPLE ;
+ break ;
+
+ case SF_FORMAT_G723_40:
+ codec = G723_40_BITS_PER_SAMPLE ;
+ bytesperblock = G723_40_BYTES_PER_BLOCK ;
+ bitspersample = G723_40_BITS_PER_SAMPLE ;
+ break ;
+
+ default : return SFE_UNIMPLEMENTED ;
+ } ;
+
+ psf->blockwidth = psf->bytewidth = 1 ;
+
+ psf->filelength = psf_get_filelen (psf) ;
+ if (psf->filelength < psf->dataoffset)
+ psf->filelength = psf->dataoffset ;
+
+ psf->datalength = psf->filelength - psf->dataoffset ;
+ if (psf->dataend > 0)
+ psf->datalength -= psf->filelength - psf->dataend ;
+
+ if (psf->file.mode == SFM_READ)
+ { pg72x->private = g72x_reader_init (codec, &(pg72x->blocksize), &(pg72x->samplesperblock)) ;
+ if (pg72x->private == NULL)
+ return SFE_MALLOC_FAILED ;
+
+ pg72x->bytesperblock = bytesperblock ;
+
+ psf->read_short = g72x_read_s ;
+ psf->read_int = g72x_read_i ;
+ psf->read_float = g72x_read_f ;
+ psf->read_double = g72x_read_d ;
+
+ psf->seek = g72x_seek ;
+
+ if (psf->datalength % pg72x->blocksize)
+ { psf_log_printf (psf, "*** Odd psf->datalength (%D) should be a multiple of %d\n", psf->datalength, pg72x->blocksize) ;
+ pg72x->blocks_total = (psf->datalength / pg72x->blocksize) + 1 ;
+ }
+ else
+ pg72x->blocks_total = psf->datalength / pg72x->blocksize ;
+
+ psf->sf.frames = pg72x->blocks_total * pg72x->samplesperblock ;
+
+ psf_g72x_decode_block (psf, pg72x) ;
+ }
+ else if (psf->file.mode == SFM_WRITE)
+ { pg72x->private = g72x_writer_init (codec, &(pg72x->blocksize), &(pg72x->samplesperblock)) ;
+ if (pg72x->private == NULL)
+ return SFE_MALLOC_FAILED ;
+
+ pg72x->bytesperblock = bytesperblock ;
+
+ psf->write_short = g72x_write_s ;
+ psf->write_int = g72x_write_i ;
+ psf->write_float = g72x_write_f ;
+ psf->write_double = g72x_write_d ;
+
+ if (psf->datalength % pg72x->blocksize)
+ pg72x->blocks_total = (psf->datalength / pg72x->blocksize) + 1 ;
+ else
+ pg72x->blocks_total = psf->datalength / pg72x->blocksize ;
+
+ if (psf->datalength > 0)
+ psf->sf.frames = (8 * psf->datalength) / bitspersample ;
+
+ if ((psf->sf.frames * bitspersample) / 8 != psf->datalength)
+ psf_log_printf (psf, "*** Warning : weird psf->datalength.\n") ;
+ } ;
+
+ psf->codec_close = g72x_close ;
+
+ return 0 ;
+} /* g72x_init */
+
+/*============================================================================================
+** G721 Read Functions.
+*/
+
+static int
+psf_g72x_decode_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x)
+{ int k ;
+
+ pg72x->block_curr ++ ;
+ pg72x->sample_curr = 0 ;
+
+ if (pg72x->block_curr > pg72x->blocks_total)
+ { memset (pg72x->samples, 0, G72x_BLOCK_SIZE * sizeof (short)) ;
+ return 1 ;
+ } ;
+
+ if ((k = psf_fread (pg72x->block, 1, pg72x->bytesperblock, psf)) != pg72x->bytesperblock)
+ psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, pg72x->bytesperblock) ;
+
+ pg72x->blocksize = k ;
+ g72x_decode_block (pg72x->private, pg72x->block, pg72x->samples) ;
+
+ return 1 ;
+} /* psf_g72x_decode_block */
+
+static int
+g72x_read_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x, short *ptr, int len)
+{ int count, total = 0, indx = 0 ;
+
+ while (indx < len)
+ { if (pg72x->block_curr > pg72x->blocks_total)
+ { memset (&(ptr [indx]), 0, (len - indx) * sizeof (short)) ;
+ return total ;
+ } ;
+
+ if (pg72x->sample_curr >= pg72x->samplesperblock)
+ psf_g72x_decode_block (psf, pg72x) ;
+
+ count = pg72x->samplesperblock - pg72x->sample_curr ;
+ count = (len - indx > count) ? count : len - indx ;
+
+ memcpy (&(ptr [indx]), &(pg72x->samples [pg72x->sample_curr]), count * sizeof (short)) ;
+ indx += count ;
+ pg72x->sample_curr += count ;
+ total = indx ;
+ } ;
+
+ return total ;
+} /* g72x_read_block */
+
+static sf_count_t
+g72x_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len)
+{ G72x_PRIVATE *pg72x ;
+ int readcount, count ;
+ sf_count_t total = 0 ;
+
+ if (psf->codec_data == NULL)
+ return 0 ;
+ pg72x = (G72x_PRIVATE*) psf->codec_data ;
+
+ while (len > 0)
+ { readcount = (len > 0x10000000) ? 0x10000000 : (int) len ;
+
+ count = g72x_read_block (psf, pg72x, ptr, readcount) ;
+
+ total += count ;
+ len -= count ;
+
+ if (count != readcount)
+ break ;
+ } ;
+
+ return total ;
+} /* g72x_read_s */
+
+static sf_count_t
+g72x_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len)
+{ G72x_PRIVATE *pg72x ;
+ short *sptr ;
+ int k, bufferlen, readcount = 0, count ;
+ sf_count_t total = 0 ;
+
+ if (psf->codec_data == NULL)
+ return 0 ;
+ pg72x = (G72x_PRIVATE*) psf->codec_data ;
+
+ sptr = psf->u.sbuf ;
+ bufferlen = SF_BUFFER_LEN / sizeof (short) ;
+ while (len > 0)
+ { readcount = (len >= bufferlen) ? bufferlen : len ;
+ count = g72x_read_block (psf, pg72x, sptr, readcount) ;
+
+ for (k = 0 ; k < readcount ; k++)
+ ptr [total + k] = sptr [k] << 16 ;
+
+ total += count ;
+ len -= readcount ;
+ if (count != readcount)
+ break ;
+ } ;
+
+ return total ;
+} /* g72x_read_i */
+
+static sf_count_t
+g72x_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len)
+{ G72x_PRIVATE *pg72x ;
+ short *sptr ;
+ int k, bufferlen, readcount = 0, count ;
+ sf_count_t total = 0 ;
+ float normfact ;
+
+ if (psf->codec_data == NULL)
+ return 0 ;
+ pg72x = (G72x_PRIVATE*) psf->codec_data ;
+
+ normfact = (psf->norm_float == SF_TRUE) ? 1.0 / ((float) 0x8000) : 1.0 ;
+
+ sptr = psf->u.sbuf ;
+ bufferlen = SF_BUFFER_LEN / sizeof (short) ;
+ while (len > 0)
+ { readcount = (len >= bufferlen) ? bufferlen : len ;
+ count = g72x_read_block (psf, pg72x, sptr, readcount) ;
+ for (k = 0 ; k < readcount ; k++)
+ ptr [total + k] = normfact * sptr [k] ;
+
+ total += count ;
+ len -= readcount ;
+ if (count != readcount)
+ break ;
+ } ;
+
+ return total ;
+} /* g72x_read_f */
+
+static sf_count_t
+g72x_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len)
+{ G72x_PRIVATE *pg72x ;
+ short *sptr ;
+ int k, bufferlen, readcount = 0, count ;
+ sf_count_t total = 0 ;
+ double normfact ;
+
+ if (psf->codec_data == NULL)
+ return 0 ;
+ pg72x = (G72x_PRIVATE*) psf->codec_data ;
+
+ normfact = (psf->norm_double == SF_TRUE) ? 1.0 / ((double) 0x8000) : 1.0 ;
+
+ sptr = psf->u.sbuf ;
+ bufferlen = SF_BUFFER_LEN / sizeof (short) ;
+ while (len > 0)
+ { readcount = (len >= bufferlen) ? bufferlen : len ;
+ count = g72x_read_block (psf, pg72x, 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 ;
+} /* g72x_read_d */
+
+static sf_count_t
+g72x_seek (SF_PRIVATE *psf, int UNUSED (mode), sf_count_t UNUSED (offset))
+{
+ psf_log_printf (psf, "seek unsupported\n") ;
+
+ /* No simple solution. To do properly, would need to seek
+ ** to start of file and decode everything up to seek position.
+ ** Maybe implement SEEK_SET to 0 only?
+ */
+ return 0 ;
+
+/*
+** G72x_PRIVATE *pg72x ;
+** int newblock, newsample, sample_curr ;
+**
+** if (psf->codec_data == NULL)
+** return 0 ;
+** pg72x = (G72x_PRIVATE*) psf->codec_data ;
+**
+** if (! (psf->datalength && psf->dataoffset))
+** { psf->error = SFE_BAD_SEEK ;
+** return PSF_SEEK_ERROR ;
+** } ;
+**
+** sample_curr = (8 * psf->datalength) / G721_32_BITS_PER_SAMPLE ;
+**
+** switch (whence)
+** { case SEEK_SET :
+** if (offset < 0 || offset > sample_curr)
+** { psf->error = SFE_BAD_SEEK ;
+** return PSF_SEEK_ERROR ;
+** } ;
+** newblock = offset / pg72x->samplesperblock ;
+** newsample = offset % pg72x->samplesperblock ;
+** break ;
+**
+** case SEEK_CUR :
+** if (psf->current + offset < 0 || psf->current + offset > sample_curr)
+** { psf->error = SFE_BAD_SEEK ;
+** return PSF_SEEK_ERROR ;
+** } ;
+** newblock = (8 * (psf->current + offset)) / pg72x->samplesperblock ;
+** newsample = (8 * (psf->current + offset)) % pg72x->samplesperblock ;
+** break ;
+**
+** case SEEK_END :
+** if (offset > 0 || sample_curr + offset < 0)
+** { psf->error = SFE_BAD_SEEK ;
+** return PSF_SEEK_ERROR ;
+** } ;
+** newblock = (sample_curr + offset) / pg72x->samplesperblock ;
+** newsample = (sample_curr + offset) % pg72x->samplesperblock ;
+** break ;
+**
+** default :
+** psf->error = SFE_BAD_SEEK ;
+** return PSF_SEEK_ERROR ;
+** } ;
+**
+** if (psf->file.mode == SFM_READ)
+** { psf_fseek (psf, psf->dataoffset + newblock * pg72x->blocksize, SEEK_SET) ;
+** pg72x->block_curr = newblock ;
+** psf_g72x_decode_block (psf, pg72x) ;
+** pg72x->sample_curr = newsample ;
+** }
+** else
+** { /+* What to do about write??? *+/
+** psf->error = SFE_BAD_SEEK ;
+** return PSF_SEEK_ERROR ;
+** } ;
+**
+** psf->current = newblock * pg72x->samplesperblock + newsample ;
+** return psf->current ;
+**
+*/
+} /* g72x_seek */
+
+/*==========================================================================================
+** G72x Write Functions.
+*/
+
+static int
+psf_g72x_encode_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x)
+{ int k ;
+
+ /* Encode the samples. */
+ g72x_encode_block (pg72x->private, pg72x->samples, pg72x->block) ;
+
+ /* Write the block to disk. */
+ if ((k = psf_fwrite (pg72x->block, 1, pg72x->blocksize, psf)) != pg72x->blocksize)
+ psf_log_printf (psf, "*** Warning : short write (%d != %d).\n", k, pg72x->blocksize) ;
+
+ pg72x->sample_curr = 0 ;
+ pg72x->block_curr ++ ;
+
+ /* Set samples to zero for next block. */
+ memset (pg72x->samples, 0, G72x_BLOCK_SIZE * sizeof (short)) ;
+
+ return 1 ;
+} /* psf_g72x_encode_block */
+
+static int
+g72x_write_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x, const short *ptr, int len)
+{ int count, total = 0, indx = 0 ;
+
+ while (indx < len)
+ { count = pg72x->samplesperblock - pg72x->sample_curr ;
+
+ if (count > len - indx)
+ count = len - indx ;
+
+ memcpy (&(pg72x->samples [pg72x->sample_curr]), &(ptr [indx]), count * sizeof (short)) ;
+ indx += count ;
+ pg72x->sample_curr += count ;
+ total = indx ;
+
+ if (pg72x->sample_curr >= pg72x->samplesperblock)
+ psf_g72x_encode_block (psf, pg72x) ;
+ } ;
+
+ return total ;
+} /* g72x_write_block */
+
+static sf_count_t
+g72x_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len)
+{ G72x_PRIVATE *pg72x ;
+ int writecount, count ;
+ sf_count_t total = 0 ;
+
+ if (psf->codec_data == NULL)
+ return 0 ;
+ pg72x = (G72x_PRIVATE*) psf->codec_data ;
+
+ while (len > 0)
+ { writecount = (len > 0x10000000) ? 0x10000000 : (int) len ;
+
+ count = g72x_write_block (psf, pg72x, ptr, writecount) ;
+
+ total += count ;
+ len -= count ;
+ if (count != writecount)
+ break ;
+ } ;
+
+ return total ;
+} /* g72x_write_s */
+
+static sf_count_t
+g72x_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len)
+{ G72x_PRIVATE *pg72x ;
+ short *sptr ;
+ int k, bufferlen, writecount = 0, count ;
+ sf_count_t total = 0 ;
+
+ if (psf->codec_data == NULL)
+ return 0 ;
+ pg72x = (G72x_PRIVATE*) psf->codec_data ;
+
+ sptr = psf->u.sbuf ;
+ bufferlen = ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (short) ;
+ while (len > 0)
+ { writecount = (len >= bufferlen) ? bufferlen : len ;
+ for (k = 0 ; k < writecount ; k++)
+ sptr [k] = ptr [total + k] >> 16 ;
+ count = g72x_write_block (psf, pg72x, sptr, writecount) ;
+
+ total += count ;
+ len -= writecount ;
+ if (count != writecount)
+ break ;
+ } ;
+ return total ;
+} /* g72x_write_i */
+
+static sf_count_t
+g72x_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len)
+{ G72x_PRIVATE *pg72x ;
+ short *sptr ;
+ int k, bufferlen, writecount = 0, count ;
+ sf_count_t total = 0 ;
+ float normfact ;
+
+ if (psf->codec_data == NULL)
+ return 0 ;
+ pg72x = (G72x_PRIVATE*) psf->codec_data ;
+
+ normfact = (psf->norm_float == SF_TRUE) ? (1.0 * 0x8000) : 1.0 ;
+
+ sptr = psf->u.sbuf ;
+ bufferlen = ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (short) ;
+ while (len > 0)
+ { writecount = (len >= bufferlen) ? bufferlen : len ;
+ for (k = 0 ; k < writecount ; k++)
+ sptr [k] = lrintf (normfact * ptr [total + k]) ;
+ count = g72x_write_block (psf, pg72x, sptr, writecount) ;
+
+ total += count ;
+ len -= writecount ;
+ if (count != writecount)
+ break ;
+ } ;
+
+ return total ;
+} /* g72x_write_f */
+
+static sf_count_t
+g72x_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len)
+{ G72x_PRIVATE *pg72x ;
+ short *sptr ;
+ int k, bufferlen, writecount = 0, count ;
+ sf_count_t total = 0 ;
+ double normfact ;
+
+ if (psf->codec_data == NULL)
+ return 0 ;
+ pg72x = (G72x_PRIVATE*) psf->codec_data ;
+
+ normfact = (psf->norm_double == SF_TRUE) ? (1.0 * 0x8000) : 1.0 ;
+
+ sptr = psf->u.sbuf ;
+ bufferlen = ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (short) ;
+ while (len > 0)
+ { writecount = (len >= bufferlen) ? bufferlen : len ;
+ for (k = 0 ; k < writecount ; k++)
+ sptr [k] = lrint (normfact * ptr [total + k]) ;
+ count = g72x_write_block (psf, pg72x, sptr, writecount) ;
+
+ total += count ;
+ len -= writecount ;
+ if (count != writecount)
+ break ;
+ } ;
+
+ return total ;
+} /* g72x_write_d */
+
+static int
+g72x_close (SF_PRIVATE *psf)
+{ G72x_PRIVATE *pg72x ;
+
+ pg72x = (G72x_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 (pg72x->sample_curr && pg72x->sample_curr < G72x_BLOCK_SIZE)
+ psf_g72x_encode_block (psf, pg72x) ;
+
+ if (psf->write_header)
+ psf->write_header (psf, SF_FALSE) ;
+ } ;
+
+ /* Only free the pointer allocated by g72x_(reader|writer)_init. */
+ free (pg72x->private) ;
+
+ return 0 ;
+} /* g72x_close */
+
projects / Faustine.git / blobdiff