| /* |
| ** Copyright (C) 2006-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| ** Copyright (C) 2006 Paul Davis <paul@linuxaudiosystems.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 <stddef.h> |
| #include <string.h> |
| |
| #include "common.h" |
| |
| |
| static int gen_coding_history (char * added_history, int added_history_max, const SF_INFO * psfinfo) ; |
| |
| static inline size_t |
| bc_min_size (const SF_BROADCAST_INFO* info) |
| { if (info == NULL) |
| return 0 ; |
| |
| return offsetof (SF_BROADCAST_INFO, coding_history) + info->coding_history_size ; |
| } /* bc_min_size */ |
| |
| SF_BROADCAST_INFO_16K* |
| broadcast_var_alloc (void) |
| { return calloc (1, sizeof (SF_BROADCAST_INFO_16K)) ; |
| } /* broadcast_var_alloc */ |
| |
| int |
| broadcast_var_set (SF_PRIVATE *psf, const SF_BROADCAST_INFO * info, size_t datasize) |
| { size_t len ; |
| |
| if (info == NULL) |
| return SF_FALSE ; |
| |
| if (bc_min_size (info) > datasize) |
| { psf->error = SFE_BAD_BROADCAST_INFO_SIZE ; |
| return SF_FALSE ; |
| } ; |
| |
| if (datasize >= sizeof (SF_BROADCAST_INFO_16K)) |
| { psf->error = SFE_BAD_BROADCAST_INFO_TOO_BIG ; |
| return SF_FALSE ; |
| } ; |
| |
| if (psf->broadcast_16k == NULL) |
| { if ((psf->broadcast_16k = broadcast_var_alloc ()) == NULL) |
| { psf->error = SFE_MALLOC_FAILED ; |
| return SF_FALSE ; |
| } ; |
| } ; |
| |
| memcpy (psf->broadcast_16k, info, offsetof (SF_BROADCAST_INFO, coding_history)) ; |
| |
| psf_strlcpy_crlf (psf->broadcast_16k->coding_history, info->coding_history, sizeof (psf->broadcast_16k->coding_history), datasize - offsetof (SF_BROADCAST_INFO, coding_history)) ; |
| len = strlen (psf->broadcast_16k->coding_history) ; |
| |
| if (len > 0 && psf->broadcast_16k->coding_history [len - 1] != '\n') |
| psf_strlcat (psf->broadcast_16k->coding_history, sizeof (psf->broadcast_16k->coding_history), "\r\n") ; |
| |
| if (psf->file.mode == SFM_WRITE) |
| { char added_history [256] ; |
| |
| gen_coding_history (added_history, sizeof (added_history), &(psf->sf)) ; |
| psf_strlcat (psf->broadcast_16k->coding_history, sizeof (psf->broadcast_16k->coding_history), added_history) ; |
| } ; |
| |
| /* Force coding_history_size to be even. */ |
| len = strlen (psf->broadcast_16k->coding_history) ; |
| len += (len & 1) ? 1 : 2 ; |
| psf->broadcast_16k->coding_history_size = len ; |
| |
| /* Currently writing this version. */ |
| psf->broadcast_16k->version = 1 ; |
| |
| return SF_TRUE ; |
| } /* broadcast_var_set */ |
| |
| |
| int |
| broadcast_var_get (SF_PRIVATE *psf, SF_BROADCAST_INFO * data, size_t datasize) |
| { size_t size ; |
| |
| if (psf->broadcast_16k == NULL) |
| return SF_FALSE ; |
| |
| size = SF_MIN (datasize, bc_min_size ((const SF_BROADCAST_INFO *) psf->broadcast_16k)) ; |
| |
| memcpy (data, psf->broadcast_16k, size) ; |
| |
| return SF_TRUE ; |
| } /* broadcast_var_get */ |
| |
| /*------------------------------------------------------------------------------ |
| */ |
| |
| static int |
| gen_coding_history (char * added_history, int added_history_max, const SF_INFO * psfinfo) |
| { char chnstr [16] ; |
| int count, width ; |
| |
| /* |
| ** From : http://www.sr.se/utveckling/tu/bwf/docs/codhist2.htm |
| ** |
| ** Parameter Variable string <allowed option> Unit |
| ** ========================================================================================== |
| ** Coding Algorithm A=<ANALOGUE, PCM, MPEG1L1, MPEG1L2, MPEG1L3, |
| ** MPEG2L1, MPEG2L2, MPEG2L3> |
| ** Sampling frequency F=<11000,22050,24000,32000,44100,48000> [Hz] |
| ** Bit-rate B=<any bit-rate allowed in MPEG 2 (ISO/IEC [kbit/s per channel] |
| ** 13818-3)> |
| ** Word Length W=<8, 12, 14, 16, 18, 20, 22, 24> [bits] |
| ** Mode M=<mono, stereo, dual-mono, joint-stereo> |
| ** Text, free string T=<a free ASCII-text string for in house use. |
| ** This string should contain no commas (ASCII |
| ** 2Chex). Examples of the contents: ID-No; codec |
| ** type; A/D type> |
| */ |
| |
| switch (psfinfo->channels) |
| { case 0 : |
| return SF_FALSE ; |
| |
| case 1 : |
| psf_strlcpy (chnstr, sizeof (chnstr), "mono") ; |
| break ; |
| |
| case 2 : |
| psf_strlcpy (chnstr, sizeof (chnstr), "stereo") ; |
| break ; |
| |
| default : |
| snprintf (chnstr, sizeof (chnstr), "%uchn", psfinfo->channels) ; |
| break ; |
| } ; |
| |
| switch (SF_CODEC (psfinfo->format)) |
| { case SF_FORMAT_PCM_U8 : |
| case SF_FORMAT_PCM_S8 : |
| width = 8 ; |
| break ; |
| case SF_FORMAT_PCM_16 : |
| width = 16 ; |
| break ; |
| case SF_FORMAT_PCM_24 : |
| width = 24 ; |
| break ; |
| case SF_FORMAT_PCM_32 : |
| width = 32 ; |
| break ; |
| case SF_FORMAT_FLOAT : |
| width = 24 ; /* Bits in the mantissa + 1 */ |
| break ; |
| case SF_FORMAT_DOUBLE : |
| width = 53 ; /* Bits in the mantissa + 1 */ |
| break ; |
| case SF_FORMAT_ULAW : |
| case SF_FORMAT_ALAW : |
| width = 12 ; |
| break ; |
| default : |
| width = 42 ; |
| break ; |
| } ; |
| |
| count = snprintf (added_history, added_history_max, |
| "A=PCM,F=%u,W=%hu,M=%s,T=%s-%s\r\n", |
| psfinfo->samplerate, width, chnstr, PACKAGE, VERSION) ; |
| |
| if (count >= added_history_max) |
| return 0 ; |
| |
| return count ; |
| } /* gen_coding_history */ |
| |