/* * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application * Copyright (C) 2005-2014, 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 * * The Initial Developer of the Original Code is * Brian West * Portions created by the Initial Developer are Copyright (C) * the Initial Developer. All Rights Reserved. * * Contributor(s): * Mathieu Rene * * mod_codec2 -- FreeSWITCH CODEC2 Module * */ #include #include /* Uncomment to log input/output data for debugging #define LOG_DATA #define CODEC2_DEBUG */ #define CODEC2_SAMPLES_PER_FRAME 160 #ifdef CODEC2_DEBUG #define codec2_assert(_x) switch_assert(_x) #else #define codec2_assert(_x) #endif SWITCH_MODULE_LOAD_FUNCTION(mod_codec2_load); SWITCH_MODULE_DEFINITION(mod_codec2, mod_codec2_load, NULL, NULL); struct codec2_context { void *encoder; void *decoder; #ifdef LOG_DATA FILE *encoder_in; FILE *encoder_out; FILE *encoder_out_unpacked; FILE *decoder_in; FILE *decoder_in_unpacked; FILE *decoder_out; #endif }; #ifdef LOG_DATA static int c2_count = 0; #endif static switch_status_t switch_codec2_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings) { uint32_t encoding, decoding; struct codec2_context *context = NULL; encoding = (flags & SWITCH_CODEC_FLAG_ENCODE); decoding = (flags & SWITCH_CODEC_FLAG_DECODE); if (!(encoding || decoding)) { return SWITCH_STATUS_FALSE; } if (!(context = switch_core_alloc(codec->memory_pool, sizeof(*context)))) { return SWITCH_STATUS_FALSE; } if (encoding) { context->encoder = codec2_create(CODEC2_MODE_2400); } if (decoding) { context->decoder = codec2_create(CODEC2_MODE_2400); } codec->private_info = context; #ifdef LOG_DATA { int c = c2_count++; char buf[1024]; switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CONSOLE, "Logging as /tmp/c2-%d-*\n", c); if (encoding) { snprintf(buf, sizeof(buf), "/tmp/c2-%d-enc-in", c); context->encoder_in = fopen(buf, "w"); snprintf(buf, sizeof(buf), "/tmp/c2-%d-enc-out", c); context->encoder_out = fopen(buf, "w"); snprintf(buf, sizeof(buf), "/tmp/c2-%d-enc-out-unpacked", c); context->encoder_out_unpacked = fopen(buf, "w"); } if (decoding) { snprintf(buf, sizeof(buf), "/tmp/c2-%d-dec-in", c); context->decoder_in = fopen(buf, "w"); snprintf(buf, sizeof(buf), "/tmp/c2-%d-dec-out", c); context->decoder_out = fopen(buf, "w"); snprintf(buf, sizeof(buf), "/tmp/c2-%d-dec-out-unpacked", c); context->decoder_in_unpacked = fopen(buf, "w"); } } #endif return SWITCH_STATUS_SUCCESS; } static switch_status_t switch_codec2_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) { struct codec2_context *context = codec->private_info; codec2_assert(decoded_data_len == CODEC2_SAMPLES_PER_FRAME * 2); #ifdef LOG_DATA fwrite(decoded_data, decoded_data_len, 1, context->encoder_in); fflush(context->encoder_in); #endif codec2_encode(context->encoder, encoded_data, decoded_data); #ifdef LOG_DATA fwrite(encode_buf, sizeof(encode_buf), 1, context->encoder_out_unpacked); fflush(context->encoder_out_unpacked); fwrite(encoded_data, 8, 1, context->encoder_out); fflush(context->encoder_out); #endif *encoded_data_len = 8; return SWITCH_STATUS_SUCCESS; } static switch_status_t switch_codec2_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) { struct codec2_context *context = codec->private_info; codec2_assert(encoded_data_len == 8 /* aligned to 8 */); #ifdef LOG_DATA fwrite(encoded_data, encoded_data_len, 1, context->decoder_in); fflush(context->decoder_in); fwrite(bits, sizeof(bits), 1, context->decoder_in_unpacked); fflush(context->decoder_in_unpacked); #endif codec2_decode(context->decoder, decoded_data, encoded_data); #ifdef LOG_DATA fwrite(decoded_data, CODEC2_SAMPLES_PER_FRAME, 2, context->decoder_out); fflush(context->decoder_out); #endif *decoded_data_len = CODEC2_SAMPLES_PER_FRAME * 2; /* 160 samples */ return SWITCH_STATUS_SUCCESS; } static switch_status_t switch_codec2_destroy(switch_codec_t *codec) { struct codec2_context *context = codec->private_info; codec2_destroy(context->encoder); codec2_destroy(context->decoder); context->encoder = NULL; context->decoder = NULL; #ifdef LOG_DATA if (context->encoder_in) { fclose(context->encoder_in); } if (context->encoder_out) { fclose(context->encoder_out); } if (context->encoder_out_unpacked) { fclose(context->encoder_out_unpacked); } if (context->decoder_in) { fclose(context->decoder_in); } if (context->decoder_in_unpacked) { fclose(context->decoder_in_unpacked); } if (context->decoder_out) { fclose(context->decoder_out); } #endif return SWITCH_STATUS_SUCCESS; } SWITCH_MODULE_LOAD_FUNCTION(mod_codec2_load) { switch_codec_interface_t *codec_interface; *module_interface = switch_loadable_module_create_module_interface(pool, modname); SWITCH_ADD_CODEC(codec_interface, "CODEC2 2550bps"); switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, 111, "CODEC2", NULL, 8000, /* samples/sec */ 8000, /* samples/sec */ 2550, /* bps */ 20000, /* ptime */ CODEC2_SAMPLES_PER_FRAME, /* samples decoded */ CODEC2_SAMPLES_PER_FRAME*2, /* bytes decoded */ 0, /* bytes encoded */ 1, /* channels */ 1, /* frames/packet */ switch_codec2_init, switch_codec2_encode, switch_codec2_decode, switch_codec2_destroy); 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 noet: */