/* ** Copyright (C) 1999-2001 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 #include #include #include #include #include "config.h" #include "sndfile.h" #include "sfendian.h" #include "floatcast.h" #include "common.h" /*------------------------------------------------------------------------------ ** Macros to handle big/little endian issues. */ #define FAP_MARKER (MAKE_MARKER ('f', 'a', 'p', ' ')) #define PAF_MARKER (MAKE_MARKER (' ', 'p', 'a', 'f')) /*------------------------------------------------------------------------------ ** Other defines. */ #define PAF_HEADER_LENGTH 2048 /*------------------------------------------------------------------------------ ** Typedefs. */ typedef struct { unsigned int version ; unsigned int endianness ; unsigned int samplerate ; unsigned int format ; unsigned int channels ; unsigned int source ; } PAF_FMT ; typedef struct { unsigned int index, blocks, channels, samplesperblock, blockcount, blocksize, samplecount ; unsigned char *block ; int *samples ; unsigned char data [1] ; /* Data size fixed during malloc (). */ } PAF24_PRIVATE ; /*------------------------------------------------------------------------------ ** Private static functions. */ static int paf24_reader_init (SF_PRIVATE *psf) ; static int paf24_writer_init (SF_PRIVATE *psf) ; static int paf24_read_block (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24) ; static int paf24_close (SF_PRIVATE *psf) ; static int paf24_read_s (SF_PRIVATE *psf, short *ptr, int len) ; static int paf24_read_i (SF_PRIVATE *psf, int *ptr, int len) ; static int paf24_read_f (SF_PRIVATE *psf, float *ptr, int len) ; static int paf24_read_d (SF_PRIVATE *psf, double *ptr, int len, int normalize) ; static int paf24_write_s (SF_PRIVATE *psf, short *ptr, int len) ; static int paf24_write_i (SF_PRIVATE *psf, int *ptr, int len) ; static int paf24_write_f (SF_PRIVATE *psf, float *ptr, int len) ; static int paf24_write_d (SF_PRIVATE *psf, double *ptr, int len, int normalize) ; static off_t paf24_seek (SF_PRIVATE *psf, off_t offset, int whence) ; /* static void endswap_paf_fmt (PAF_FMT *ppaf_fmt) ; */ /*------------------------------------------------------------------------------ ** Public functions. */ int paf_open_read (SF_PRIVATE *psf) { PAF_FMT paf_fmt ; unsigned int marker ; int error ; psf_binheader_readf (psf, "pm", 0, &marker) ; psf_log_printf (psf, "Signature : %D\n", marker) ; if (marker == PAF_MARKER) { psf_binheader_readf (psf, "LLLLLL", &(paf_fmt.version), &(paf_fmt.endianness), &(paf_fmt.samplerate), &(paf_fmt.format), &(paf_fmt.channels), &(paf_fmt.source)) ; } else if (marker == FAP_MARKER) { psf_binheader_readf (psf, "llllll", &(paf_fmt.version), &(paf_fmt.endianness), &(paf_fmt.samplerate), &(paf_fmt.format), &(paf_fmt.channels), &(paf_fmt.source)) ; } else return SFE_PAF_NO_MARKER ; psf_log_printf (psf, "Version : %d\n", paf_fmt.version) ; if (paf_fmt.version != 0) { psf_log_printf (psf, "*** Bad version number. should be zero.\n") ; return SFE_PAF_VERSION ; } ; psf_log_printf (psf, "Endianness : %d => ", paf_fmt.endianness) ; if (paf_fmt.endianness) psf_log_printf (psf, "Little\n", paf_fmt.endianness) ; else psf_log_printf (psf, "Big\n", paf_fmt.endianness) ; psf_log_printf (psf, "Sample Rate : %d\n", paf_fmt.samplerate) ; if (psf->filelength < PAF_HEADER_LENGTH) return SFE_PAF_SHORT_HEADER ; psf->dataoffset = PAF_HEADER_LENGTH ; psf->datalength = psf->filelength - psf->dataoffset ; psf->current = 0 ; psf->endian = paf_fmt.endianness ? SF_ENDIAN_LITTLE : SF_ENDIAN_BIG ; psf_binheader_readf (psf, "p", psf->dataoffset) ; psf->sf.samplerate = paf_fmt.samplerate ; psf->sf.channels = paf_fmt.channels ; /* Only fill in type major. */ psf->sf.format = SF_FORMAT_PAF ; psf->sf.sections = 1 ; psf_log_printf (psf, "Format : %d => ", paf_fmt.format) ; switch (paf_fmt.format) { case 0 : psf_log_printf (psf, "16 bit linear PCM\n") ; psf->sf.pcmbitwidth = 16 ; psf->bytewidth = BITWIDTH2BYTES (psf->sf.pcmbitwidth) ; psf->sf.format |= paf_fmt.endianness ? SF_FORMAT_PCM_LE : SF_FORMAT_PCM_BE ; ; if ((error = pcm_read_init (psf))) return error ; psf->blockwidth = psf->bytewidth * psf->sf.channels ; psf_log_printf (psf, "X blockwidth : %d\n", psf->blockwidth) ; if (psf->blockwidth) psf->sf.samples = psf->datalength / psf->blockwidth ; else psf_log_printf (psf, "*** Warning : blockwidth == 0.\n") ; psf_log_printf (psf, "X samples : %d\n", psf->sf.samples) ; break ; case 1 : psf_log_printf (psf, "24 bit linear PCM\n") ; psf->sf.pcmbitwidth = 24 ; psf->bytewidth = BITWIDTH2BYTES (psf->sf.pcmbitwidth) ; psf->sf.format |= paf_fmt.endianness ? SF_FORMAT_PCM_LE : SF_FORMAT_PCM_BE ; ; psf->read_short = (func_short) paf24_read_s ; psf->read_int = (func_int) paf24_read_i ; psf->read_float = (func_float) paf24_read_f ; psf->read_double = (func_double) paf24_read_d ; if ((error = paf24_reader_init (psf))) return error ; psf->seek_func = (func_seek) paf24_seek ; psf->close = (func_close) paf24_close ; psf->blockwidth = psf->bytewidth * psf->sf.channels ; psf_log_printf (psf, "X blockwidth : %d\n", psf->blockwidth) ; psf->sf.samples = 10 * psf->datalength / (32 * psf->sf.channels) ; psf_log_printf (psf, "X samples : %d\n", psf->sf.samples) ; break ; default : psf_log_printf (psf, "Unknown\n") ; return SFE_PAF_UNKNOWN_FORMAT ; break ; } ; psf_log_printf (psf, "Channels : %d\n", paf_fmt.channels) ; psf_log_printf (psf, "Source : %d => ", paf_fmt.source) ; switch (paf_fmt.source) { case 1 : psf_log_printf (psf, "Analog Recording\n") ; break ; case 2 : psf_log_printf (psf, "Digital Transfer\n") ; break ; case 3 : psf_log_printf (psf, "Multi-track Mixdown\n") ; break ; case 5 : psf_log_printf (psf, "Audio Resulting From DSP Processing\n") ; break ; default : psf_log_printf (psf, "Unknown\n") ; break ; } ; return 0 ; } /* paf_open_read */ /*------------------------------------------------------------------------------ */ int paf_open_write (SF_PRIVATE *psf) { PAF_FMT paf_fmt ; int subformat, error, paf_format ; if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_PAF) return SFE_BAD_OPEN_FORMAT ; subformat = psf->sf.format & SF_FORMAT_SUBMASK ; if (subformat == SF_FORMAT_PCM_BE) psf->endian = SF_ENDIAN_BIG ; else if (subformat == SF_FORMAT_PCM_LE) psf->endian = SF_ENDIAN_LITTLE ; else if (CPU_IS_BIG_ENDIAN && subformat == SF_FORMAT_PCM) psf->endian = SF_ENDIAN_BIG ; else if (CPU_IS_LITTLE_ENDIAN && subformat == SF_FORMAT_PCM) psf->endian = SF_ENDIAN_LITTLE ; else return SFE_BAD_OPEN_FORMAT ; psf->bytewidth = BITWIDTH2BYTES (psf->sf.pcmbitwidth) ; psf->blockwidth = psf->bytewidth * psf->sf.channels ; psf->dataoffset = PAF_HEADER_LENGTH ; psf->datalength = psf->blockwidth * psf->sf.samples ; psf->filelength = psf->datalength + psf->dataoffset ; psf->error = 0 ; switch (psf->sf.pcmbitwidth) { case 16 : paf_format = 0 ; psf->bytewidth = 2 ; break ; case 24 : paf_format = 1 ; psf->bytewidth = 3 ; break ; default : return SFE_PAF_UNKNOWN_FORMAT ; } ; switch (paf_format) { case 0 : /* 16-bit linear PCM. */ if ((error = pcm_write_init (psf))) return error ; break ; case 1 : /* 24-bit linear PCM */ psf->write_short = (func_short) paf24_write_s ; psf->write_int = (func_int) paf24_write_i ; psf->write_float = (func_float) paf24_write_f ; psf->write_double = (func_double) paf24_write_d ; if ((error = paf24_writer_init (psf))) return error ; psf->seek_func = (func_seek) paf24_seek ; psf->close = (func_close) paf24_close ; break ; default : break ; } ; /* Reset the current header length to zero. */ psf->header [0] = 0 ; psf->headindex = 0 ; if (psf->endian == SF_ENDIAN_BIG) { /* Marker, version, endianness, samplerate */ psf_binheader_writef (psf, "mLLL", PAF_MARKER, 0, 0, psf->sf.samplerate) ; /* format, channels, source */ psf_binheader_writef (psf, "LLL", paf_format, psf->sf.channels, paf_fmt.source) ; } else if (psf->endian == SF_ENDIAN_LITTLE) { /* Marker, version, endianness, samplerate */ psf_binheader_writef (psf, "mlll", FAP_MARKER, 0, 1, psf->sf.samplerate) ; /* format, channels, source */ psf_binheader_writef (psf, "lll", paf_format, psf->sf.channels, 0) ; } ; /* Zero fill to dataoffset. */ psf_binheader_writef (psf, "z", psf->dataoffset - psf->headindex) ; fwrite (psf->header, psf->headindex, 1, psf->file) ; return 0 ; } /* paf_open_write */ /*=============================================================================== ** 24 bit PAF files have a really weird encoding. ** For a mono file, 10 samples (each being 3 bytes) are packed into a 32 byte ** block. The 8 ints in this 32 byte block are then endian swapped (as ints) ** if necessary before being written to disk. ** For a stereo file, blocks of 10 samples from the same channel are encoded ** into 32 bytes as fro the mono case. The 32 block bytes are then interleaved ** on disk. ** Reading has to reverse the above process :-). ** Weird!!! ** ** The code below attempts to gain efficiency while maintaining readability. */ static int paf24_reader_init (SF_PRIVATE *psf) { PAF24_PRIVATE *ppaf24 ; unsigned int paf24size ; paf24size = sizeof (PAF24_PRIVATE) + psf->sf.channels * (32 + 10 * sizeof (int)) ; if (! (psf->fdata = malloc (paf24size))) return SFE_MALLOC_FAILED ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; memset (ppaf24, 0, paf24size) ; ppaf24->channels = psf->sf.channels ; ppaf24->block = (unsigned char*) ppaf24->data ; ppaf24->samples = (int*) (ppaf24->data + 32 * ppaf24->channels) ; ppaf24->blocksize = 32 * ppaf24->channels ; ppaf24->samplesperblock = 10 ; if (psf->datalength % ppaf24->blocksize) { psf_log_printf (psf, "*** Warning : file seems to be truncated.\n") ; ppaf24->blocks = psf->datalength / ppaf24->blocksize + 1 ; } else ppaf24->blocks = psf->datalength / ppaf24->blocksize ; psf->sf.samples = ppaf24->samplesperblock * ppaf24->blocks ; paf24_read_block (psf, ppaf24) ; /* Read first block. */ return 0 ; } /* paf24_reader_init */ static int paf24_read_block (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24) { int k, *iptr, newsample, channel ; unsigned char *cptr ; ppaf24->blockcount ++ ; ppaf24->samplecount = 0 ; if (ppaf24->blockcount > ppaf24->blocks) { memset (ppaf24->samples, 0, ppaf24->samplesperblock * ppaf24->channels) ; return 1 ; } ; /* Read the block. */ if ((k = fread (ppaf24->block, 1, ppaf24->blocksize, psf->file)) != ppaf24->blocksize) psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, ppaf24->blocksize) ; /* Do endian swapping if necessary. */ iptr = (int*) (ppaf24->data) ; if ((CPU_IS_BIG_ENDIAN && psf->endian == SF_ENDIAN_LITTLE) || (CPU_IS_LITTLE_ENDIAN && psf->endian == SF_ENDIAN_BIG)) { for (k = 0 ; k < 8 * ppaf24->channels ; k++) iptr [k] = ENDSWAP_INT (iptr [k]) ; } ; /* Unpack block. */ for (k = 0 ; k < 10 * ppaf24->channels ; k++) { channel = k % ppaf24->channels ; cptr = ppaf24->block + 32 * channel + 3 * (k / ppaf24->channels) ; newsample = (cptr [0] << 8) | (cptr [1] << 16) | (cptr [2] << 24) ; ppaf24->samples [k] = newsample / 256 ; } ; return 1 ; } /* paf24_read_block */ static int paf24_read (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24, int *ptr, int len) { int count, total = 0, index = 0 ; while (index < len) { if (ppaf24->blockcount >= ppaf24->blocks && ppaf24->samplecount >= ppaf24->samplesperblock) { memset (&(ptr[index]), 0, (len - index) * sizeof (int)) ; return total ; } ; if (ppaf24->samplecount >= ppaf24->samplesperblock) paf24_read_block (psf, ppaf24) ; count = (ppaf24->samplesperblock - ppaf24->samplecount) * ppaf24->channels ; count = (len - index > count) ? count : len - index ; memcpy (&(ptr[index]), &(ppaf24->samples [ppaf24->samplecount * ppaf24->channels]), count * sizeof (int)) ; index += count ; ppaf24->samplecount += count / ppaf24->channels ; total = index ; } ; return total ; } /* paf24_read */ static int paf24_read_s (SF_PRIVATE *psf, short *ptr, int len) { PAF24_PRIVATE *ppaf24 ; int *iptr ; int k, bufferlen, readcount = 0, count ; int index = 0, total = 0 ; if (! psf->fdata) return 0 ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; iptr = (int*) psf->buffer ; bufferlen = psf->sf.channels * ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (int) ; while (len > 0) { readcount = (len >= bufferlen) ? bufferlen : len ; count = paf24_read (psf, ppaf24, iptr, readcount) ; for (k = 0 ; k < readcount ; k++) ptr [index+k] = (short) (iptr [k] / 256) ; index += readcount ; total += count ; len -= readcount ; } ; return total ; } /* paf24_read_s */ static int paf24_read_i (SF_PRIVATE *psf, int *ptr, int len) { PAF24_PRIVATE *ppaf24 ; int total ; if (! psf->fdata) return 0 ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; total = paf24_read (psf, ppaf24, ptr, len) ; return total ; } /* paf24_read_i */ static int paf24_read_f (SF_PRIVATE *psf, float *ptr, int len) { PAF24_PRIVATE *ppaf24 ; int *iptr ; int k, bufferlen, readcount = 0, count ; int index = 0, total = 0 ; if (! psf->fdata) return 0 ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; iptr = (int*) psf->buffer ; bufferlen = psf->sf.channels * ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (int) ; while (len > 0) { readcount = (len >= bufferlen) ? bufferlen : len ; count = paf24_read (psf, ppaf24, iptr, readcount) ; for (k = 0 ; k < readcount ; k++) ptr [index+k] = (float) (iptr [k]) ; index += readcount ; total += count ; len -= readcount ; } ; return total ; } /* paf24_read_f */ static int paf24_read_d (SF_PRIVATE *psf, double *ptr, int len, int normalize) { PAF24_PRIVATE *ppaf24 ; int *iptr ; int k, bufferlen, readcount = 0, count ; int index = 0, total = 0 ; if (! psf->fdata) return 0 ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; iptr = (int*) psf->buffer ; bufferlen = psf->sf.channels * ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (int) ; while (len > 0) { readcount = (len >= bufferlen) ? bufferlen : len ; count = paf24_read (psf, ppaf24, iptr, readcount) ; for (k = 0 ; k < readcount ; k++) ptr [index+k] = (double) (iptr [k]) ; index += readcount ; total += count ; len -= readcount ; } ; return total ; } /* paf24_read_d */ /*--------------------------------------------------------------------------- */ static int paf24_writer_init (SF_PRIVATE *psf) { PAF24_PRIVATE *ppaf24 ; unsigned int paf24size ; paf24size = sizeof (PAF24_PRIVATE) + psf->sf.channels * (32 + 10 * sizeof (int)) ; if (! (psf->fdata = malloc (paf24size))) return SFE_MALLOC_FAILED ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; memset (ppaf24, 0, paf24size) ; ppaf24->channels = psf->sf.channels ; ppaf24->block = (unsigned char*) ppaf24->data ; ppaf24->samples = (int*) (ppaf24->data + 32 * ppaf24->channels) ; ppaf24->blocksize = 32 * ppaf24->channels ; ppaf24->samplesperblock = 10 ; if (psf->datalength % ppaf24->blocksize) { psf_log_printf (psf, "*** Warning : file seems to be truncated.\n") ; ppaf24->blocks = psf->datalength / ppaf24->blocksize + 1 ; } else ppaf24->blocks = psf->datalength / ppaf24->blocksize ; psf->sf.samples = ppaf24->samplesperblock * ppaf24->blocks ; return 0 ; } /* paf24_writer_init */ static int paf24_write_block (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24) { int k, *iptr, nextsample, channel ; unsigned char *cptr ; /* First pack block. */ for (k = 0 ; k < 10 * ppaf24->channels ; k++) { channel = k % ppaf24->channels ; cptr = ppaf24->block + 32 * channel + 3 * (k / ppaf24->channels) ; nextsample = ppaf24->samples [k] ; cptr [0] = nextsample & 0xFF ; cptr [1] = (nextsample >> 8) & 0xFF ; cptr [2] = (nextsample >> 16) & 0xFF ; } ; /* Do endian swapping if necessary. */ iptr = (int*) (ppaf24->data) ; if ((CPU_IS_BIG_ENDIAN && psf->endian == SF_ENDIAN_LITTLE) || (CPU_IS_LITTLE_ENDIAN && psf->endian == SF_ENDIAN_BIG)) { for (k = 0 ; k < 8 * ppaf24->channels ; k++) iptr [k] = ENDSWAP_INT (iptr [k]) ; } ; /* Write block to disk. */ if ((k = fwrite (ppaf24->block, 1, ppaf24->blocksize, psf->file)) != ppaf24->blocksize) psf_log_printf (psf, "*** Warning : short write (%d != %d).\n", k, ppaf24->blocksize) ; ppaf24->blockcount ++ ; ppaf24->samplecount = 0 ; return 1 ; } /* paf24_write_block */ static int paf24_write (SF_PRIVATE *psf, PAF24_PRIVATE *ppaf24, int *ptr, int len) { int count, total = 0, index = 0 ; while (index < len) { count = (ppaf24->samplesperblock - ppaf24->samplecount) * ppaf24->channels ; if (count > len - index) count = len - index ; memcpy (&(ppaf24->samples [ppaf24->samplecount * ppaf24->channels]), &(ptr [index]), count * sizeof (int)) ; index += count ; ppaf24->samplecount += count / ppaf24->channels ; total = index ; if (ppaf24->samplecount >= ppaf24->samplesperblock) paf24_write_block (psf, ppaf24) ; } ; return total ; } /* paf24_write */ static int paf24_write_s (SF_PRIVATE *psf, short *ptr, int len) { PAF24_PRIVATE *ppaf24 ; int *iptr ; int k, bufferlen, writecount = 0, count ; int index = 0, total = 0 ; if (! psf->fdata) return 0 ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; iptr = (int*) psf->buffer ; bufferlen = psf->sf.channels * ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (int) ; while (len > 0) { writecount = (len >= bufferlen) ? bufferlen : len ; for (k = 0 ; k < writecount ; k++) iptr [k] = ((int) ptr [index+k]) * 256 ; count = paf24_write (psf, ppaf24, iptr, writecount) ; index += writecount ; total += count ; len -= writecount ; } ; return total ; } /* paf24_write_s */ static int paf24_write_i (SF_PRIVATE *psf, int *ptr, int len) { PAF24_PRIVATE *ppaf24 ; int total = 0 ; if (! psf->fdata) return 0 ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; total = paf24_write (psf, ppaf24, ptr, len) ; return total ; } /* paf24_write_i */ static int paf24_write_f (SF_PRIVATE *psf, float *ptr, int len) { PAF24_PRIVATE *ppaf24 ; int *iptr ; int k, bufferlen, writecount = 0, count ; int index = 0, total = 0 ; if (! psf->fdata) return 0 ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; iptr = (int*) psf->buffer ; bufferlen = psf->sf.channels * ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (int) ; while (len > 0) { writecount = (len >= bufferlen) ? bufferlen : len ; for (k = 0 ; k < writecount ; k++) iptr [k] = FLOAT_TO_INT (ptr [index+k]) ; count = paf24_write (psf, ppaf24, iptr, writecount) ; index += writecount ; total += count ; len -= writecount ; } ; return total ; } /* paf24_write_f */ static int paf24_write_d (SF_PRIVATE *psf, double *ptr, int len, int normalize) { PAF24_PRIVATE *ppaf24 ; int *iptr ; int k, bufferlen, writecount = 0, count ; int index = 0, total = 0 ; if (! psf->fdata) return 0 ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; iptr = (int*) psf->buffer ; bufferlen = psf->sf.channels * ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (int) ; while (len > 0) { writecount = (len >= bufferlen) ? bufferlen : len ; for (k = 0 ; k < writecount ; k++) iptr [k] = DOUBLE_TO_INT (ptr [index+k]) ; count = paf24_write (psf, ppaf24, iptr, writecount) ; index += writecount ; total += count ; len -= writecount ; } ; return total ; } /* paf24_write_d */ /*--------------------------------------------------------------------------- */ static off_t paf24_seek (SF_PRIVATE *psf, off_t offset, int whence) { PAF24_PRIVATE *ppaf24 ; int newblock, newsample ; if (! psf->fdata) return 0 ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; if (! (psf->blockwidth && psf->datalength && psf->dataoffset)) { psf->error = SFE_BAD_SEEK ; return ((off_t) -1) ; } ; switch (whence) { case SEEK_SET : if (offset < 0 || offset > ppaf24->blocks * ppaf24->samplesperblock) { psf->error = SFE_BAD_SEEK ; return ((off_t) -1) ; } ; newblock = offset / ppaf24->samplesperblock ; newsample = offset % ppaf24->samplesperblock ; break ; case SEEK_CUR : if (psf->current + offset < 0 || psf->current + offset > ppaf24->blocks * ppaf24->samplesperblock) { psf->error = SFE_BAD_SEEK ; return ((off_t) -1) ; } ; newblock = (psf->current + offset) / ppaf24->samplesperblock ; newsample = (psf->current + offset) % ppaf24->samplesperblock ; break ; case SEEK_END : if (offset > 0 || ppaf24->samplesperblock * ppaf24->blocks + offset < 0) { psf->error = SFE_BAD_SEEK ; return ((off_t) -1) ; } ; newblock = (ppaf24->samplesperblock * ppaf24->blocks + offset) / ppaf24->samplesperblock ; newsample = (ppaf24->samplesperblock * ppaf24->blocks + offset) % ppaf24->samplesperblock ; break ; default : psf->error = SFE_BAD_SEEK ; return ((off_t) -1) ; } ; if (psf->mode == SF_MODE_READ) { fseek (psf->file, (int) (psf->dataoffset + newblock * ppaf24->blocksize), SEEK_SET) ; ppaf24->blockcount = newblock ; paf24_read_block (psf, ppaf24) ; ppaf24->samplecount = newsample ; } else { /* What to do about write??? */ psf->error = SFE_BAD_SEEK ; return ((off_t) -1) ; } ; psf->current = newblock * ppaf24->samplesperblock + newsample ; return psf->current ; } /* paf24_seek */ /*--------------------------------------------------------------------------- */ static int paf24_close (SF_PRIVATE *psf) { PAF24_PRIVATE *ppaf24 ; if (! psf->fdata) return 0 ; ppaf24 = (PAF24_PRIVATE*) psf->fdata ; if (psf->mode == SF_MODE_WRITE) { if (ppaf24->samplecount && ppaf24->samplecount < ppaf24->samplesperblock) paf24_write_block (psf, ppaf24) ; } ; free (psf->fdata) ; psf->fdata = NULL ; return 0 ; } /* paf24_close */ /*--------------------------------------------------------------------------- */ /*- static void endswap_paf_fmt (PAF_FMT *ppaf_fmt) { ppaf_fmt->version = ENDSWAP_INT (ppaf_fmt->version) ; ppaf_fmt->endianness = ENDSWAP_INT (ppaf_fmt->endianness) ; ppaf_fmt->samplerate = ENDSWAP_INT (ppaf_fmt->samplerate) ; ppaf_fmt->format = ENDSWAP_INT (ppaf_fmt->format) ; ppaf_fmt->channels = ENDSWAP_INT (ppaf_fmt->channels) ; ppaf_fmt->source = ENDSWAP_INT (ppaf_fmt->source) ; } /+* endswap_paf_fmt *+/ -*/