diff options
Diffstat (limited to 'libs/libsndfile/src/pvf.c')
| -rw-r--r-- | libs/libsndfile/src/pvf.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/libs/libsndfile/src/pvf.c b/libs/libsndfile/src/pvf.c new file mode 100644 index 0000000000..1dab17ccb1 --- /dev/null +++ b/libs/libsndfile/src/pvf.c @@ -0,0 +1,199 @@ +/* +** Copyright (C) 2002-2004 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 <fcntl.h> +#include <string.h> +#include <ctype.h> + +#include "sndfile.h" +#include "sfendian.h" +#include "common.h" + +/*------------------------------------------------------------------------------ +** Macros to handle big/little endian issues. +*/ + +#define PVF1_MARKER (MAKE_MARKER ('P', 'V', 'F', '1')) + +/*------------------------------------------------------------------------------ +** Private static functions. +*/ + +static int pvf_close (SF_PRIVATE *psf) ; + +static int pvf_write_header (SF_PRIVATE *psf, int calc_length) ; +static int pvf_read_header (SF_PRIVATE *psf) ; + +/*------------------------------------------------------------------------------ +** Public function. +*/ + +int +pvf_open (SF_PRIVATE *psf) +{ int subformat ; + int error = 0 ; + + if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0)) + { if ((error = pvf_read_header (psf))) + return error ; + } ; + + subformat = psf->sf.format & SF_FORMAT_SUBMASK ; + + if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR) + { if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_PVF) + return SFE_BAD_OPEN_FORMAT ; + + psf->endian = SF_ENDIAN_BIG ; + + if (pvf_write_header (psf, SF_FALSE)) + return psf->error ; + + psf->write_header = pvf_write_header ; + } ; + + psf->container_close = pvf_close ; + + psf->blockwidth = psf->bytewidth * psf->sf.channels ; + + switch (subformat) + { case SF_FORMAT_PCM_S8 : /* 8-bit linear PCM. */ + case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */ + case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */ + error = pcm_init (psf) ; + break ; + + default : break ; + } ; + + return error ; +} /* pvf_open */ + +/*------------------------------------------------------------------------------ +*/ + +static int +pvf_close (SF_PRIVATE *psf) +{ + psf = psf ; + + return 0 ; +} /* pvf_close */ + +static int +pvf_write_header (SF_PRIVATE *psf, int calc_length) +{ sf_count_t current ; + + if (psf->pipeoffset > 0) + return 0 ; + + calc_length = calc_length ; /* Avoid a compiler warning. */ + + current = psf_ftell (psf) ; + + /* Reset the current header length to zero. */ + psf->header [0] = 0 ; + psf->headindex = 0 ; + + if (psf->is_pipe == SF_FALSE) + psf_fseek (psf, 0, SEEK_SET) ; + + LSF_SNPRINTF ((char*) psf->header, sizeof (psf->header), "PVF1\n%d %d %d\n", + psf->sf.channels, psf->sf.samplerate, psf->bytewidth * 8) ; + + psf->headindex = strlen ((char*) psf->header) ; + + /* Header construction complete so write it out. */ + psf_fwrite (psf->header, psf->headindex, 1, psf) ; + + if (psf->error) + return psf->error ; + + psf->dataoffset = psf->headindex ; + + if (current > 0) + psf_fseek (psf, current, SEEK_SET) ; + + return psf->error ; +} /* pvf_write_header */ + +static int +pvf_read_header (SF_PRIVATE *psf) +{ char buffer [32] ; + int marker, channels, samplerate, bitwidth ; + + psf_binheader_readf (psf, "pmj", 0, &marker, 1) ; + psf_log_printf (psf, "%M\n", marker) ; + + if (marker != PVF1_MARKER) + return SFE_PVF_NO_PVF1 ; + + /* Grab characters up until a newline which is replaced by an EOS. */ + psf_binheader_readf (psf, "G", buffer, sizeof (buffer)) ; + + if (sscanf (buffer, "%d %d %d", &channels, &samplerate, &bitwidth) != 3) + return SFE_PVF_BAD_HEADER ; + + psf_log_printf (psf, " Channels : %d\n Sample rate : %d\n Bit width : %d\n", + channels, samplerate, bitwidth) ; + + psf->sf.channels = channels ; + psf->sf.samplerate = samplerate ; + + switch (bitwidth) + { case 8 : + psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_S8 ; + psf->bytewidth = 1 ; + break ; + + case 16 : + psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_16 ; + psf->bytewidth = 2 ; + break ; + case 32 : + psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_32 ; + psf->bytewidth = 4 ; + break ; + + default : + return SFE_PVF_BAD_BITWIDTH ; + } ; + + psf->dataoffset = psf_ftell (psf) ; + psf_log_printf (psf, " Data Offset : %D\n", psf->dataoffset) ; + + psf->endian = SF_ENDIAN_BIG ; + + psf->datalength = psf->filelength - psf->dataoffset ; + psf->blockwidth = psf->sf.channels * psf->bytewidth ; + + if (! psf->sf.frames && psf->blockwidth) + psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ; + + return 0 ; +} /* pvf_read_header */ +/* +** Do not edit or modify anything in this comment block. +** The arch-tag line is a file identity tag for the GNU Arch +** revision control system. +** +** arch-tag: 20a26761-8bc1-41d7-b1f3-9793bf3d9864 +*/ |