X-Git-Url: http://git.tuebingen.mpg.de/?a=blobdiff_plain;ds=sidebyside;f=aac_common.c;h=812c742cf668e7ad67e6f5b502fbe6c93829f0a3;hb=refs%2Fheads%2Fmaint;hp=2dc979011be245850cef106167bd4fad611abe1e;hpb=cb26d94043cb3717aa3d27ff115cb73bbb555230;p=paraslash.git diff --git a/aac_common.c b/aac_common.c deleted file mode 100644 index 2dc97901..00000000 --- a/aac_common.c +++ /dev/null @@ -1,139 +0,0 @@ -/* - * Copyright (C) 2006 Andre Noll - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. - */ -/* - * based in parts on libfaad, Copyright (C) 2003-2005 M. Bakker, - * Ahead Software AG - */ - -/** \file aac_common.c common functions of aac_afh and aadcec */ - -#include "para.h" -#include "aac.h" -#include "error.h" - -/** - * get a new libfaad decoder handle - * - */ -NeAACDecHandle aac_open(void) -{ - NeAACDecHandle h = NeAACDecOpen(); - NeAACDecConfigurationPtr c = NeAACDecGetCurrentConfiguration(h); - - c->defObjectType = LC; - c->outputFormat = FAAD_FMT_16BIT; - c->downMatrix = 0; - NeAACDecSetConfiguration(h, c); - return h; -}; - -static int aac_read_decoder_length(unsigned char *buf, int *description_len) -{ - uint8_t b; - uint8_t numBytes = 0; - uint32_t length = 0; - - do { - b = buf[numBytes]; - numBytes++; - length = (length << 7) | (b & 0x7F); - } while - ((b & 0x80) && numBytes < 4); - *description_len = numBytes; - return length; -} - -/** - * search for the position and the length of the decoder configuration - * - * \param buf buffer to seach - * \param buflen length of \a buf - * \param skip Upon succesful return, this contains the offset in \a buf where - * the decoder config starts. - * - * \return The length of the decoder configuration - */ -ssize_t aac_find_esds(unsigned char *buf, size_t buflen, size_t *skip) -{ - size_t i; - - for (i = 0; i + 4 < buflen; i++) { - unsigned char *p = buf + i; - int decoder_length, description_len; - - if (p[0] != 'e' || p[1] != 's' || p[2] != 'd' || p[3] != 's') - continue; - i += 8; - p = buf + i; - PARA_INFO_LOG("found esds@%zu, next: %x\n", i, *p); - if (*p == 3) - i += 8; - else - i += 6; - p = buf + i; - PARA_INFO_LOG("next: %x\n", *p); - if (*p != 4) - continue; - i += 18; - p = buf + i; - PARA_INFO_LOG("next: %x\n", *p); - if (*p != 5) - continue; - i++; - p = buf + i; - decoder_length = aac_read_decoder_length(p, &description_len); - PARA_INFO_LOG("decoder length: %d\n", decoder_length); - i += description_len; - *skip = i; - return decoder_length; - } - return -E_ESDS; -} - -/** - * search for the first entry in the stco table - * - * \param buf buffer to seach - * \param buflen length of \a buf - * \param skip Upon succesful return, this contains the number - * of bytes to skip from the input buffer. - * - * \return the position of the first entry in the table on success, - * -E_STCO on errors. - */ -ssize_t aac_find_entry_point(unsigned char *buf, size_t buflen, size_t *skip) -{ - ssize_t ret; - size_t i; - - for (i = 0; i + 20 < buflen; i++) { - unsigned char *p = buf + i; - - if (p[0] != 's' || p[1] != 't' || p[2] != 'c' || p[3] != 'o') - continue; - PARA_INFO_LOG("found stco@%zu\n", i); - i += 12; - ret = aac_read_int32(buf + i); /* first offset */ - i += 4; - PARA_INFO_LOG("entry point: %zd\n", ret); - *skip = i; - return ret; - } - PARA_WARNING_LOG("stco not found, buflen: %zu\n", buflen); - return -E_STCO; -}