diff --git a/build/modules.conf.in b/build/modules.conf.in index 80970cf7f6..50aaba51b0 100644 --- a/build/modules.conf.in +++ b/build/modules.conf.in @@ -51,6 +51,7 @@ applications/mod_voicemail codecs/mod_amr #codecs/mod_amrwb codecs/mod_bv +codecs/mod_b64 #codecs/mod_celt #codecs/mod_codec2 #codecs/mod_com_g729 diff --git a/conf/vanilla/autoload_configs/modules.conf.xml b/conf/vanilla/autoload_configs/modules.conf.xml index d271b2ea96..c6b5b54d6b 100644 --- a/conf/vanilla/autoload_configs/modules.conf.xml +++ b/conf/vanilla/autoload_configs/modules.conf.xml @@ -87,6 +87,7 @@ + diff --git a/src/mod/codecs/mod_b64/mod_b64.c b/src/mod/codecs/mod_b64/mod_b64.c new file mode 100644 index 0000000000..15d2f6cfe1 --- /dev/null +++ b/src/mod/codecs/mod_b64/mod_b64.c @@ -0,0 +1,185 @@ +/* + * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application + * Copyright (C) 2005-2012, Anthony Minessale II + * + * Version: MPL 1.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application + * + * The Initial Developer of the Original Code is + * Anthony Minessale II + * Portions created by the Initial Developer are Copyright (C) + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Brian K. West + * + * mod_b64.c -- The B64 ultra-low delay audio codec (http://www.b64-codec.org/) + * + */ + +#include "switch.h" + +SWITCH_MODULE_LOAD_FUNCTION(mod_b64_load); +SWITCH_MODULE_DEFINITION(mod_b64, mod_b64_load, NULL, NULL); + +#define HEADER "----Come to ClueCon Every August! " +#define HLEN strlen(HEADER) + +static switch_status_t switch_codec_b64_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings) +{ + return SWITCH_STATUS_SUCCESS; +} + +static switch_status_t switch_codec_b64_destroy(switch_codec_t *codec) +{ + + codec->private_info = NULL; + return SWITCH_STATUS_SUCCESS; +} + +static int rot(char *p, char min, char max, int i) +{ + int r = 0; + int c; + + if (*p >= min && *p <= max) { + if ((c = *p + i) <= max) { + *p = c; + } else { + *p = *p - i; + } + r++; + } + + return r; +} + +static void rot13_buffer(char *buf, size_t len) +{ + char *p = buf; + char *e = buf + len; + + while(p < e) { + if (!rot(p, 'a', 'z', 13)) { + rot(p, 'A', 'Z', 13); + } + p++; + } +} + +static switch_status_t switch_codec_b64_encode(switch_codec_t *codec, + switch_codec_t *other_codec, + void *decoded_data, + uint32_t decoded_data_len, + uint32_t decoded_rate, void *encoded_data, uint32_t *encoded_data_len, uint32_t *encoded_rate, + unsigned int *flag) +{ + char *p = encoded_data; + strncpy(p, HEADER, *encoded_data_len - HLEN); + p += HLEN; + encoded_data = p; + *encoded_data_len -= HLEN; + + switch_b64_encode((unsigned char *) decoded_data, decoded_data_len, (unsigned char *) encoded_data, *encoded_data_len); + *encoded_data_len = strlen(encoded_data); + rot13_buffer(encoded_data, *encoded_data_len); + *encoded_data_len += HLEN; + + return SWITCH_STATUS_SUCCESS; + +} + +static switch_status_t switch_codec_b64_decode(switch_codec_t *codec, + switch_codec_t *other_codec, + void *encoded_data, + uint32_t encoded_data_len, + uint32_t encoded_rate, void *decoded_data, uint32_t *decoded_data_len, uint32_t *decoded_rate, + unsigned int *flag) +{ + + char *p = encoded_data; + + if (strncmp(p, HEADER, HLEN)) { + switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "HEADER CHECK ERROR!"); + return SWITCH_STATUS_FALSE; + } + + p += HLEN; + encoded_data = p; + encoded_data_len -= HLEN; + + rot13_buffer(encoded_data, encoded_data_len); + switch_b64_decode(encoded_data, decoded_data, *decoded_data_len); + *decoded_data_len = codec->implementation->decoded_bytes_per_packet; + + return SWITCH_STATUS_SUCCESS; +} + +SWITCH_MODULE_LOAD_FUNCTION(mod_b64_load) +{ + switch_codec_interface_t *codec_interface; + int samples = 160; + int bytes = 320; + int mss = 20000; + int x = 0; + int rate = 8000; + int bits = 171200; + + /* connect my internal structure to the blank pointer passed to me */ + *module_interface = switch_loadable_module_create_module_interface(pool, modname); + + SWITCH_ADD_CODEC(codec_interface, "B64 (STANDARD)"); + + for (x = 0; x < 3; x++) { + switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, /* enumeration defining the type of the codec */ + 116, /* the IANA code number */ + "b64",/* the IANA code name */ + NULL, /* default fmtp to send (can be overridden by the init function) */ + rate, /* samples transferred per second */ + rate, /* actual samples transferred per second */ + bits, /* bits transferred per second */ + mss, /* number of microseconds per frame */ + samples, /* number of samples per frame */ + bytes, /* number of bytes per frame decompressed */ + 0, /* number of bytes per frame compressed */ + 1, /* number of channels represented */ + 1, /* number of frames per network packet */ + switch_codec_b64_init, /* function to initialize a codec handle using this implementation */ + switch_codec_b64_encode, /* function to encode raw data into encoded data */ + switch_codec_b64_decode, /* function to decode encoded data into raw data */ + switch_codec_b64_destroy); /* deinitalize a codec handle using this implementation */ + + bytes *= 2; + samples *= 2; + rate *= 2; + bits *= 2; + + } + + /* indicate that the module should continue to be loaded */ + return SWITCH_STATUS_SUCCESS; +} + +/* For Emacs: + * Local Variables: + * mode:c + * indent-tabs-mode:t + * tab-width:4 + * c-basic-offset:4 + * End: + * For VIM: + * vim:set softtabstop=4 shiftwidth=4 tabstop=4: + */ +