Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 2002-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| 3 | ** |
| 4 | ** This program is free software; you can redistribute it and/or modify |
| 5 | ** it under the terms of the GNU Lesser General Public License as published by |
| 6 | ** the Free Software Foundation; either version 2.1 of the License, or |
| 7 | ** (at your option) any later version. |
| 8 | ** |
| 9 | ** This program is distributed in the hope that it will be useful, |
| 10 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | ** GNU Lesser General Public License for more details. |
| 13 | ** |
| 14 | ** You should have received a copy of the GNU Lesser General Public License |
| 15 | ** along with this program; if not, write to the Free Software |
| 16 | ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #include "sfconfig.h" |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <fcntl.h> |
| 23 | #include <string.h> |
| 24 | #include <ctype.h> |
| 25 | |
| 26 | #include "sndfile.h" |
| 27 | #include "sfendian.h" |
| 28 | #include "common.h" |
| 29 | |
| 30 | /*------------------------------------------------------------------------------ |
| 31 | ** Macros to handle big/little endian issues. |
| 32 | */ |
| 33 | |
| 34 | #define PVF1_MARKER (MAKE_MARKER ('P', 'V', 'F', '1')) |
| 35 | |
| 36 | /*------------------------------------------------------------------------------ |
| 37 | ** Private static functions. |
| 38 | */ |
| 39 | |
| 40 | static int pvf_close (SF_PRIVATE *psf) ; |
| 41 | |
| 42 | static int pvf_write_header (SF_PRIVATE *psf, int calc_length) ; |
| 43 | static int pvf_read_header (SF_PRIVATE *psf) ; |
| 44 | |
| 45 | /*------------------------------------------------------------------------------ |
| 46 | ** Public function. |
| 47 | */ |
| 48 | |
| 49 | int |
| 50 | pvf_open (SF_PRIVATE *psf) |
| 51 | { int subformat ; |
| 52 | int error = 0 ; |
| 53 | |
| 54 | if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| 55 | { if ((error = pvf_read_header (psf))) |
| 56 | return error ; |
| 57 | } ; |
| 58 | |
| 59 | subformat = SF_CODEC (psf->sf.format) ; |
| 60 | |
| 61 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 62 | { if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_PVF) |
| 63 | return SFE_BAD_OPEN_FORMAT ; |
| 64 | |
| 65 | psf->endian = SF_ENDIAN_BIG ; |
| 66 | |
| 67 | if (pvf_write_header (psf, SF_FALSE)) |
| 68 | return psf->error ; |
| 69 | |
| 70 | psf->write_header = pvf_write_header ; |
| 71 | } ; |
| 72 | |
| 73 | psf->container_close = pvf_close ; |
| 74 | |
| 75 | psf->blockwidth = psf->bytewidth * psf->sf.channels ; |
| 76 | |
| 77 | switch (subformat) |
| 78 | { case SF_FORMAT_PCM_S8 : /* 8-bit linear PCM. */ |
| 79 | case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */ |
| 80 | case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */ |
| 81 | error = pcm_init (psf) ; |
| 82 | break ; |
| 83 | |
| 84 | default : break ; |
| 85 | } ; |
| 86 | |
| 87 | return error ; |
| 88 | } /* pvf_open */ |
| 89 | |
| 90 | /*------------------------------------------------------------------------------ |
| 91 | */ |
| 92 | |
| 93 | static int |
| 94 | pvf_close (SF_PRIVATE * UNUSED (psf)) |
| 95 | { |
| 96 | return 0 ; |
| 97 | } /* pvf_close */ |
| 98 | |
| 99 | static int |
| 100 | pvf_write_header (SF_PRIVATE *psf, int UNUSED (calc_length)) |
| 101 | { sf_count_t current ; |
| 102 | |
| 103 | if (psf->pipeoffset > 0) |
| 104 | return 0 ; |
| 105 | |
| 106 | current = psf_ftell (psf) ; |
| 107 | |
| 108 | /* Reset the current header length to zero. */ |
| 109 | psf->header [0] = 0 ; |
| 110 | psf->headindex = 0 ; |
| 111 | |
| 112 | if (psf->is_pipe == SF_FALSE) |
| 113 | psf_fseek (psf, 0, SEEK_SET) ; |
| 114 | |
| 115 | snprintf ((char*) psf->header, sizeof (psf->header), "PVF1\n%d %d %d\n", |
| 116 | psf->sf.channels, psf->sf.samplerate, psf->bytewidth * 8) ; |
| 117 | |
| 118 | psf->headindex = strlen ((char*) psf->header) ; |
| 119 | |
| 120 | /* Header construction complete so write it out. */ |
| 121 | psf_fwrite (psf->header, psf->headindex, 1, psf) ; |
| 122 | |
| 123 | if (psf->error) |
| 124 | return psf->error ; |
| 125 | |
| 126 | psf->dataoffset = psf->headindex ; |
| 127 | |
| 128 | if (current > 0) |
| 129 | psf_fseek (psf, current, SEEK_SET) ; |
| 130 | |
| 131 | return psf->error ; |
| 132 | } /* pvf_write_header */ |
| 133 | |
| 134 | static int |
| 135 | pvf_read_header (SF_PRIVATE *psf) |
| 136 | { char buffer [32] ; |
| 137 | int marker, channels, samplerate, bitwidth ; |
| 138 | |
| 139 | psf_binheader_readf (psf, "pmj", 0, &marker, 1) ; |
| 140 | psf_log_printf (psf, "%M\n", marker) ; |
| 141 | |
| 142 | if (marker != PVF1_MARKER) |
| 143 | return SFE_PVF_NO_PVF1 ; |
| 144 | |
| 145 | /* Grab characters up until a newline which is replaced by an EOS. */ |
| 146 | psf_binheader_readf (psf, "G", buffer, sizeof (buffer)) ; |
| 147 | |
| 148 | if (sscanf (buffer, "%d %d %d", &channels, &samplerate, &bitwidth) != 3) |
| 149 | return SFE_PVF_BAD_HEADER ; |
| 150 | |
| 151 | psf_log_printf (psf, " Channels : %d\n Sample rate : %d\n Bit width : %d\n", |
| 152 | channels, samplerate, bitwidth) ; |
| 153 | |
| 154 | psf->sf.channels = channels ; |
| 155 | psf->sf.samplerate = samplerate ; |
| 156 | |
| 157 | switch (bitwidth) |
| 158 | { case 8 : |
| 159 | psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_S8 ; |
| 160 | psf->bytewidth = 1 ; |
| 161 | break ; |
| 162 | |
| 163 | case 16 : |
| 164 | psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_16 ; |
| 165 | psf->bytewidth = 2 ; |
| 166 | break ; |
| 167 | case 32 : |
| 168 | psf->sf.format = SF_FORMAT_PVF | SF_FORMAT_PCM_32 ; |
| 169 | psf->bytewidth = 4 ; |
| 170 | break ; |
| 171 | |
| 172 | default : |
| 173 | return SFE_PVF_BAD_BITWIDTH ; |
| 174 | } ; |
| 175 | |
| 176 | psf->dataoffset = psf_ftell (psf) ; |
| 177 | psf_log_printf (psf, " Data Offset : %D\n", psf->dataoffset) ; |
| 178 | |
| 179 | psf->endian = SF_ENDIAN_BIG ; |
| 180 | |
| 181 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 182 | psf->blockwidth = psf->sf.channels * psf->bytewidth ; |
| 183 | |
| 184 | if (! psf->sf.frames && psf->blockwidth) |
| 185 | psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ; |
| 186 | |
| 187 | return 0 ; |
| 188 | } /* pvf_read_header */ |