Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 2006-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| 3 | ** Copyright (C) 2006 Paul Davis <paul@linuxaudiosystems.com> |
| 4 | ** |
| 5 | ** This program is free software; you can redistribute it and/or modify |
| 6 | ** it under the terms of the GNU Lesser General Public License as published by |
| 7 | ** the Free Software Foundation; either version 2.1 of the License, or |
| 8 | ** (at your option) any later version. |
| 9 | ** |
| 10 | ** This program is distributed in the hope that it will be useful, |
| 11 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | ** GNU Lesser General Public License for more details. |
| 14 | ** |
| 15 | ** You should have received a copy of the GNU Lesser General Public License |
| 16 | ** along with this program; if not, write to the Free Software |
| 17 | ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | */ |
| 19 | |
| 20 | #include "sfconfig.h" |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include <stddef.h> |
| 24 | #include <string.h> |
| 25 | |
| 26 | #include "common.h" |
| 27 | |
| 28 | |
| 29 | static int gen_coding_history (char * added_history, int added_history_max, const SF_INFO * psfinfo) ; |
| 30 | |
| 31 | static inline size_t |
| 32 | bc_min_size (const SF_BROADCAST_INFO* info) |
| 33 | { if (info == NULL) |
| 34 | return 0 ; |
| 35 | |
| 36 | return offsetof (SF_BROADCAST_INFO, coding_history) + info->coding_history_size ; |
| 37 | } /* bc_min_size */ |
| 38 | |
| 39 | SF_BROADCAST_INFO_16K* |
| 40 | broadcast_var_alloc (void) |
| 41 | { return calloc (1, sizeof (SF_BROADCAST_INFO_16K)) ; |
| 42 | } /* broadcast_var_alloc */ |
| 43 | |
| 44 | int |
| 45 | broadcast_var_set (SF_PRIVATE *psf, const SF_BROADCAST_INFO * info, size_t datasize) |
| 46 | { size_t len ; |
| 47 | |
| 48 | if (info == NULL) |
| 49 | return SF_FALSE ; |
| 50 | |
| 51 | if (bc_min_size (info) > datasize) |
| 52 | { psf->error = SFE_BAD_BROADCAST_INFO_SIZE ; |
| 53 | return SF_FALSE ; |
| 54 | } ; |
| 55 | |
| 56 | if (datasize >= sizeof (SF_BROADCAST_INFO_16K)) |
| 57 | { psf->error = SFE_BAD_BROADCAST_INFO_TOO_BIG ; |
| 58 | return SF_FALSE ; |
| 59 | } ; |
| 60 | |
| 61 | if (psf->broadcast_16k == NULL) |
| 62 | { if ((psf->broadcast_16k = broadcast_var_alloc ()) == NULL) |
| 63 | { psf->error = SFE_MALLOC_FAILED ; |
| 64 | return SF_FALSE ; |
| 65 | } ; |
| 66 | } ; |
| 67 | |
| 68 | memcpy (psf->broadcast_16k, info, offsetof (SF_BROADCAST_INFO, coding_history)) ; |
| 69 | |
| 70 | psf_strlcpy_crlf (psf->broadcast_16k->coding_history, info->coding_history, sizeof (psf->broadcast_16k->coding_history), datasize - offsetof (SF_BROADCAST_INFO, coding_history)) ; |
| 71 | len = strlen (psf->broadcast_16k->coding_history) ; |
| 72 | |
| 73 | if (len > 0 && psf->broadcast_16k->coding_history [len - 1] != '\n') |
| 74 | psf_strlcat (psf->broadcast_16k->coding_history, sizeof (psf->broadcast_16k->coding_history), "\r\n") ; |
| 75 | |
| 76 | if (psf->file.mode == SFM_WRITE) |
| 77 | { char added_history [256] ; |
| 78 | |
| 79 | gen_coding_history (added_history, sizeof (added_history), &(psf->sf)) ; |
| 80 | psf_strlcat (psf->broadcast_16k->coding_history, sizeof (psf->broadcast_16k->coding_history), added_history) ; |
| 81 | } ; |
| 82 | |
| 83 | /* Force coding_history_size to be even. */ |
| 84 | len = strlen (psf->broadcast_16k->coding_history) ; |
| 85 | len += (len & 1) ? 1 : 2 ; |
| 86 | psf->broadcast_16k->coding_history_size = len ; |
| 87 | |
| 88 | /* Currently writing this version. */ |
| 89 | psf->broadcast_16k->version = 1 ; |
| 90 | |
| 91 | return SF_TRUE ; |
| 92 | } /* broadcast_var_set */ |
| 93 | |
| 94 | |
| 95 | int |
| 96 | broadcast_var_get (SF_PRIVATE *psf, SF_BROADCAST_INFO * data, size_t datasize) |
| 97 | { size_t size ; |
| 98 | |
| 99 | if (psf->broadcast_16k == NULL) |
| 100 | return SF_FALSE ; |
| 101 | |
| 102 | size = SF_MIN (datasize, bc_min_size ((const SF_BROADCAST_INFO *) psf->broadcast_16k)) ; |
| 103 | |
| 104 | memcpy (data, psf->broadcast_16k, size) ; |
| 105 | |
| 106 | return SF_TRUE ; |
| 107 | } /* broadcast_var_get */ |
| 108 | |
| 109 | /*------------------------------------------------------------------------------ |
| 110 | */ |
| 111 | |
| 112 | static int |
| 113 | gen_coding_history (char * added_history, int added_history_max, const SF_INFO * psfinfo) |
| 114 | { char chnstr [16] ; |
| 115 | int count, width ; |
| 116 | |
| 117 | /* |
| 118 | ** From : http://www.sr.se/utveckling/tu/bwf/docs/codhist2.htm |
| 119 | ** |
| 120 | ** Parameter Variable string <allowed option> Unit |
| 121 | ** ========================================================================================== |
| 122 | ** Coding Algorithm A=<ANALOGUE, PCM, MPEG1L1, MPEG1L2, MPEG1L3, |
| 123 | ** MPEG2L1, MPEG2L2, MPEG2L3> |
| 124 | ** Sampling frequency F=<11000,22050,24000,32000,44100,48000> [Hz] |
| 125 | ** Bit-rate B=<any bit-rate allowed in MPEG 2 (ISO/IEC [kbit/s per channel] |
| 126 | ** 13818-3)> |
| 127 | ** Word Length W=<8, 12, 14, 16, 18, 20, 22, 24> [bits] |
| 128 | ** Mode M=<mono, stereo, dual-mono, joint-stereo> |
| 129 | ** Text, free string T=<a free ASCII-text string for in house use. |
| 130 | ** This string should contain no commas (ASCII |
| 131 | ** 2Chex). Examples of the contents: ID-No; codec |
| 132 | ** type; A/D type> |
| 133 | */ |
| 134 | |
| 135 | switch (psfinfo->channels) |
| 136 | { case 0 : |
| 137 | return SF_FALSE ; |
| 138 | |
| 139 | case 1 : |
| 140 | psf_strlcpy (chnstr, sizeof (chnstr), "mono") ; |
| 141 | break ; |
| 142 | |
| 143 | case 2 : |
| 144 | psf_strlcpy (chnstr, sizeof (chnstr), "stereo") ; |
| 145 | break ; |
| 146 | |
| 147 | default : |
| 148 | snprintf (chnstr, sizeof (chnstr), "%uchn", psfinfo->channels) ; |
| 149 | break ; |
| 150 | } ; |
| 151 | |
| 152 | switch (SF_CODEC (psfinfo->format)) |
| 153 | { case SF_FORMAT_PCM_U8 : |
| 154 | case SF_FORMAT_PCM_S8 : |
| 155 | width = 8 ; |
| 156 | break ; |
| 157 | case SF_FORMAT_PCM_16 : |
| 158 | width = 16 ; |
| 159 | break ; |
| 160 | case SF_FORMAT_PCM_24 : |
| 161 | width = 24 ; |
| 162 | break ; |
| 163 | case SF_FORMAT_PCM_32 : |
| 164 | width = 32 ; |
| 165 | break ; |
| 166 | case SF_FORMAT_FLOAT : |
| 167 | width = 24 ; /* Bits in the mantissa + 1 */ |
| 168 | break ; |
| 169 | case SF_FORMAT_DOUBLE : |
| 170 | width = 53 ; /* Bits in the mantissa + 1 */ |
| 171 | break ; |
| 172 | case SF_FORMAT_ULAW : |
| 173 | case SF_FORMAT_ALAW : |
| 174 | width = 12 ; |
| 175 | break ; |
| 176 | default : |
| 177 | width = 42 ; |
| 178 | break ; |
| 179 | } ; |
| 180 | |
| 181 | count = snprintf (added_history, added_history_max, |
| 182 | "A=PCM,F=%u,W=%hu,M=%s,T=%s-%s\r\n", |
| 183 | psfinfo->samplerate, width, chnstr, PACKAGE, VERSION) ; |
| 184 | |
| 185 | if (count >= added_history_max) |
| 186 | return 0 ; |
| 187 | |
| 188 | return count ; |
| 189 | } /* gen_coding_history */ |
| 190 | |