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Diffstat (limited to 'etiinput.cpp')
| -rw-r--r-- | etiinput.cpp | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/etiinput.cpp b/etiinput.cpp deleted file mode 100644 index 8f47ec0..0000000 --- a/etiinput.cpp +++ /dev/null @@ -1,198 +0,0 @@ -/* - Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 - Her Majesty the Queen in Right of Canada (Communications Research - Center Canada) - - Copyrigth (C) 2014 - Matthias P. Braendli, matthias.braendli@mpb.li - - Taken from ODR-DabMod - - Supported file formats: RAW, FRAMED, STREAMED - Supports re-sync to RAW ETI file - */ -/* - This file is part of ODR-DabMod. - - ODR-DabMod 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 3 of the - License, or (at your option) any later version. - - ODR-DabMod 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 ODR-DabMod. If not, see <http://www.gnu.org/licenses/>. - */ -#include "etiinput.hpp" -#include <stdlib.h> -#include <stdint.h> -#include <string.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <unistd.h> -#include <fcntl.h> /* Definition of AT_* constants */ -#include <sys/stat.h> - -int identify_eti_format(FILE* inputFile, int *streamType) -{ - *streamType = ETI_STREAM_TYPE_NONE; - - struct stat inputFileStat; - fstat(fileno(inputFile), &inputFileStat); - size_t inputfilelength_ = inputFileStat.st_size; - - int nbframes_; - - uint32_t sync; - uint32_t nbFrames; - uint16_t frameSize; - - char discard_buffer[6144]; - - if (fread(&sync, sizeof(sync), 1, inputFile) != 1) { - fprintf(stderr, "Unable to read sync in input file!\n"); - perror(""); - return -1; - } - if ((sync == 0x49c5f8ff) || (sync == 0xb63a07ff)) { - *streamType = ETI_STREAM_TYPE_RAW; - if (inputfilelength_ > 0) { - nbframes_ = inputfilelength_ / 6144; - } - else { - nbframes_ = ~0; - } - if (fseek(inputFile, -sizeof(sync), SEEK_CUR) != 0) { - // if the seek fails, consume the rest of the frame - if (fread(discard_buffer, 6144 - sizeof(sync), 1, inputFile) - != 1) { - fprintf(stderr, "Unable to read from input file!\n"); - perror(""); - return -1; - } - } - return 0; - } - - nbFrames = sync; - if (fread(&frameSize, sizeof(frameSize), 1, inputFile) != 1) { - fprintf(stderr, "Unable to read frame size in input file!\n"); - perror(""); - return -1; - } - sync >>= 16; - sync &= 0xffff; - sync |= ((uint32_t)frameSize) << 16; - - if ((sync == 0x49c5f8ff) || (sync == 0xb63a07ff)) { - *streamType = ETI_STREAM_TYPE_STREAMED; - frameSize = nbFrames & 0xffff; - if (inputfilelength_ > 0) { - nbframes_ = inputfilelength_ / (frameSize + 2); - } - else { - nbframes_ = ~0; - } - if (fseek(inputFile, -6, SEEK_CUR) != 0) { - // if the seek fails, consume the rest of the frame - if (fread(discard_buffer, frameSize - 4, 1, inputFile) - != 1) { - fprintf(stderr, "Unable to read from input file!\n"); - perror(""); - return -1; - } - } - return 0; - } - - if (fread(&sync, sizeof(sync), 1, inputFile) != 1) { - fprintf(stderr, "Unable to read nb frame in input file!\n"); - perror(""); - return -1; - } - if ((sync == 0x49c5f8ff) || (sync == 0xb63a07ff)) { - *streamType = ETI_STREAM_TYPE_FRAMED; - if (fseek(inputFile, -6, SEEK_CUR) != 0) { - // if the seek fails, consume the rest of the frame - if (fread(discard_buffer, frameSize - 4, 1, inputFile) - != 1) { - fprintf(stderr, "Unable to read from input file!\n"); - perror(""); - return -1; - } - } - nbframes_ = ~0; - return 0; - } - - // Search for the sync marker byte by byte - for (size_t i = 10; i < 6144 + 10; ++i) { - sync >>= 8; - sync &= 0xffffff; - if (fread((uint8_t*)&sync + 3, 1, 1, inputFile) != 1) { - fprintf(stderr, "Unable to read from input file!\n"); - perror(""); - return -1; - } - if ((sync == 0x49c5f8ff) || (sync == 0xb63a07ff)) { - *streamType = ETI_STREAM_TYPE_RAW; - if (inputfilelength_ > 0) { - nbframes_ = (inputfilelength_ - i) / 6144; - } - else { - nbframes_ = ~0; - } - if (fseek(inputFile, -sizeof(sync), SEEK_CUR) != 0) { - if (fread(discard_buffer, 6144 - sizeof(sync), 1, inputFile) - != 1) { - fprintf(stderr, "Unable to read from input file!\n"); - perror(""); - return -1; - } - } - return 0; - } - } - - (void)nbframes_; // suppress warning "nbframes_ unused" - fprintf(stderr, "Bad input file format!\n"); - return -1; -} - -int get_eti_frame(FILE* inputfile, int stream_type, void* buf) -{ - // Initialise buffer - memset(buf, 0x55, 6144); - - uint16_t frameSize; - if (stream_type == ETI_STREAM_TYPE_RAW) { - frameSize = 6144; - } - else { - if (fread(&frameSize, sizeof(frameSize), 1, inputfile) != 1) { - // EOF - return 0; - } - } - - if (frameSize > 6144) { // there might be a better limit - printf("Wrong frame size %u in ETI file!\n", frameSize); - return -1; - } - - int read_bytes = fread(buf, 1, frameSize, inputfile); - if (read_bytes != frameSize) { - // A short read of a frame (i.e. reading an incomplete frame) - // is not tolerated. Input files must not contain incomplete frames - printf("Incomplete frame in ETI file!\n"); - return -1; - } - - // We have added padding, so we always return 6144 bytes - return 6144; -} - |