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author | Mark Purcell <msp@debian.org> | 2008-06-22 11:00:40 +1000 |
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committer | etobi <git@e-tobi.net> | 2013-09-03 09:48:42 +0200 |
commit | 891c51ff368ed700dec6025eeb47ce4d96f76418 (patch) | |
tree | 3729664829e4faa691d403274f38eb10890b533c /lib/libesg/representation/init_message.c | |
parent | 1c6e1f28f54ec2606c23936c1d8689f2be55a86c (diff) | |
parent | ab959d7b4194715870128e616b8e29d4a101e488 (diff) | |
download | linux-dvb-apps-a966623153d5c69ef156542.tar.gz |
Imported Debian patch 1.1.1+rev1207-1debian/1.1.1+rev1207-1
Diffstat (limited to 'lib/libesg/representation/init_message.c')
-rw-r--r-- | lib/libesg/representation/init_message.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/lib/libesg/representation/init_message.c b/lib/libesg/representation/init_message.c new file mode 100644 index 0000000..0038607 --- /dev/null +++ b/lib/libesg/representation/init_message.c @@ -0,0 +1,112 @@ +/* + * ESG parser + * + * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr) + * + * This library 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 library 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 library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#include <stdlib.h> +#include <string.h> + +#include <libesg/representation/init_message.h> +#include <libesg/representation/textual_decoder_init.h> +#include <libesg/representation/bim_decoder_init.h> + +struct esg_init_message *esg_init_message_decode(uint8_t *buffer, uint32_t size) { + uint32_t pos; + struct esg_init_message *init_message; + + if ((buffer == NULL) || (size <= 3)) { + return NULL; + } + + pos = 0; + + init_message = (struct esg_init_message *) malloc(sizeof(struct esg_init_message)); + memset(init_message, 0, sizeof(struct esg_init_message)); + + init_message->encoding_version = buffer[pos]; + pos += 1; + + init_message->indexing_flag = (buffer[pos] & 0x80) >> 7; + pos += 1; + + init_message->decoder_init_ptr = buffer[pos]; + pos += 1; + + if (init_message->indexing_flag) { + init_message->indexing_version = buffer[pos]; + pos += 1; + } + + switch (init_message->encoding_version) { + case 0xF1: { + struct esg_bim_encoding_parameters *encoding_parameters = (struct esg_bim_encoding_parameters *) malloc(sizeof(struct esg_bim_encoding_parameters)); + memset(encoding_parameters, 0, sizeof(struct esg_bim_encoding_parameters)); + init_message->encoding_parameters = (void *) encoding_parameters; + + encoding_parameters->buffer_size_flag = (buffer[pos] & 0x80) >> 7; + encoding_parameters->position_code_flag = (buffer[pos] & 0x40) >> 6; + pos += 1; + + encoding_parameters->character_encoding = buffer[pos]; + pos += 1; + + if (encoding_parameters->buffer_size_flag) { + encoding_parameters->buffer_size = (buffer[pos] << 16) | (buffer[pos+1] << 8) | buffer[pos+2]; + pos += 3; + } + +// TODO +// init_message->decoder_init = (void *) esg_bim_decoder_init_decode(buffer + init_message->decoder_init_ptr, size - init_message->decoder_init_ptr); + break; + } + case 0xF2: + case 0xF3: { + struct esg_textual_encoding_parameters *encoding_parameters = (struct esg_textual_encoding_parameters *) malloc(sizeof(struct esg_textual_encoding_parameters)); + memset(encoding_parameters, 0, sizeof(struct esg_textual_encoding_parameters)); + init_message->encoding_parameters = (void *) encoding_parameters; + + encoding_parameters->character_encoding = buffer[pos]; + pos += 1; + + init_message->decoder_init = (void *) esg_textual_decoder_init_decode(buffer + init_message->decoder_init_ptr, size - init_message->decoder_init_ptr); + break; + } + default: { + esg_init_message_free(init_message); + return NULL; + } + } + + return init_message; +} + +void esg_init_message_free(struct esg_init_message *init_message) { + if (init_message == NULL) { + return; + } + + if (init_message->encoding_parameters) { + free(init_message->encoding_parameters); + } + + if (init_message->decoder_init) { + free(init_message->decoder_init); + } + + free(init_message); +} |