| /* |
| ** Copyright (C) 2002-2011 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 <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->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| { if ((error = pvf_read_header (psf))) |
| return error ; |
| } ; |
| |
| subformat = SF_CODEC (psf->sf.format) ; |
| |
| if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| { if ((SF_CONTAINER (psf->sf.format)) != 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 * UNUSED (psf)) |
| { |
| return 0 ; |
| } /* pvf_close */ |
| |
| static int |
| pvf_write_header (SF_PRIVATE *psf, int UNUSED (calc_length)) |
| { sf_count_t current ; |
| |
| if (psf->pipeoffset > 0) |
| return 0 ; |
| |
| 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) ; |
| |
| 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 */ |