/* ** Copyright (C) 2006 Paul Davis ** Copyright (C) 2006-2009 Erik de Castro Lopo ** ** 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 #include #include #include "common.h" static void strncpy_crlf (char *dest, const char *src, size_t destmax, size_t srcmax) ; 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 ; } /* broadcast_size */ static inline size_t bc_var_coding_hist_size (const SF_BROADCAST_VAR* var) { return var->size - offsetof (SF_BROADCAST_VAR, binfo.coding_history) ; } /* broadcast_size */ SF_BROADCAST_VAR* broadcast_var_alloc (size_t datasize) { SF_BROADCAST_VAR * data ; if ((data = calloc (1, datasize)) != NULL) data->size = datasize ; return data ; } /* broadcast_var_alloc */ int broadcast_var_set (SF_PRIVATE *psf, const SF_BROADCAST_INFO * info, size_t datasize) { char added_history [256] ; int added_history_len, len ; if (info == NULL) return SF_FALSE ; if (bc_min_size (info) > datasize) { psf->error = SFE_BAD_BROADCAST_INFO_SIZE ; return SF_FALSE ; } ; added_history_len = gen_coding_history (added_history, sizeof (added_history), &(psf->sf)) ; if (psf->broadcast_var != NULL) { size_t coding_hist_offset = offsetof (SF_BROADCAST_INFO, coding_history) ; if (psf->broadcast_var->binfo.coding_history_size + added_history_len < datasize - coding_hist_offset) { free (psf->broadcast_var) ; psf->broadcast_var = NULL ; } ; } ; if (psf->broadcast_var == NULL) { int size = datasize + added_history_len + 512 ; psf->broadcast_var = calloc (1, size) ; psf->broadcast_var->size = size ; } ; memcpy (&(psf->broadcast_var->binfo), info, offsetof (SF_BROADCAST_INFO, coding_history)) ; strncpy_crlf (psf->broadcast_var->binfo.coding_history, info->coding_history, bc_var_coding_hist_size (psf->broadcast_var), info->coding_history_size) ; len = strlen (psf->broadcast_var->binfo.coding_history) ; if (len > 0 && psf->broadcast_var->binfo.coding_history [len] != '\n') strncat (psf->broadcast_var->binfo.coding_history, "\r\n", 2) ; if (psf->mode == SFM_WRITE) strncat (psf->broadcast_var->binfo.coding_history, added_history, strlen (added_history)) ; psf->broadcast_var->binfo.coding_history_size = strlen (psf->broadcast_var->binfo.coding_history) ; /* Fore coding_history_size to be even. */ psf->broadcast_var->binfo.coding_history_size += (psf->broadcast_var->binfo.coding_history_size & 1) ? 1 : 0 ; /* Currently writing this version. */ psf->broadcast_var->binfo.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_var == NULL) return SF_FALSE ; size = SF_MIN (datasize, bc_min_size (&(psf->broadcast_var->binfo))) ; memcpy (data, &(psf->broadcast_var->binfo), size) ; return SF_TRUE ; } /* broadcast_var_set */ /*------------------------------------------------------------------------------ ** Strncpy which converts all line endings to CR/LF. */ static void strncpy_crlf (char *dest, const char *src, size_t destmax, size_t srcmax) { char * destend = dest + destmax - 1 ; const char * srcend = src + srcmax ; while (dest < destend && src < srcend) { if ((src [0] == '\r' && src [1] == '\n') || (src [0] == '\n' && src [1] == '\r')) { *dest++ = '\r' ; *dest++ = '\n' ; src += 2 ; continue ; } ; if (src [0] == '\r') { *dest++ = '\r' ; *dest++ = '\n' ; src += 1 ; continue ; } ; if (src [0] == '\n') { *dest++ = '\r' ; *dest++ = '\n' ; src += 1 ; continue ; } ; *dest++ = *src++ ; } ; /* Make sure dest is terminated. */ *dest = 0 ; } /* strncpy_crlf */ 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 Unit ** ========================================================================================== ** Coding Algorithm A= ** Sampling frequency F=<11000,22050,24000,32000,44100,48000> [Hz] ** Bit-rate B= ** Word Length W=<8, 12, 14, 16, 18, 20, 22, 24> [bits] ** Mode M= ** Text, free string T= */ switch (psfinfo->channels) { case 0 : return SF_FALSE ; case 1 : strncpy (chnstr, "mono", sizeof (chnstr)) ; break ; case 2 : strncpy (chnstr, "stereo", sizeof (chnstr)) ; 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 */