/* * 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 / ISAC codec module * * 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): * Anthony Minessale II * * * mod_isac.c -- isac Codec Module * */ #include #include "isac.h" SWITCH_MODULE_LOAD_FUNCTION(mod_isac_codec_load); SWITCH_MODULE_DEFINITION(mod_isac, mod_isac_codec_load, NULL, NULL); struct isac_context { ISACStruct *ISAC_main_inst; }; static switch_status_t switch_isac_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings) { uint32_t encoding, decoding; WebRtc_Word16 err; struct isac_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; } codec->private_info = context; err = WebRtcIsac_Create(&context->ISAC_main_inst); if (err < 0) return SWITCH_STATUS_FALSE; if (encoding) { if (WebRtcIsac_EncoderInit(context->ISAC_main_inst, 0) < 0) { return SWITCH_STATUS_FALSE; } WebRtcIsac_SetEncSampRate(context->ISAC_main_inst, codec->implementation->actual_samples_per_second / 1000); } if (decoding) { if (WebRtcIsac_DecoderInit(context->ISAC_main_inst) < 0) { return SWITCH_STATUS_FALSE; } WebRtcIsac_SetDecSampRate(context->ISAC_main_inst, codec->implementation->actual_samples_per_second / 1000); } if (codec->implementation->actual_samples_per_second == 16000) { if (WebRtcIsac_ControlBwe(context->ISAC_main_inst, 32000, codec->implementation->microseconds_per_packet / 1000, 1) < 0) { return SWITCH_STATUS_FALSE; } if (WebRtcIsac_SetMaxPayloadSize(context->ISAC_main_inst, 400) < 0) { return SWITCH_STATUS_FALSE; } } else { if (WebRtcIsac_Control(context->ISAC_main_inst, 32000, codec->implementation->microseconds_per_packet / 1000) < 0) { return SWITCH_STATUS_FALSE; } if (WebRtcIsac_SetMaxPayloadSize(context->ISAC_main_inst, 600) < 0) { return SWITCH_STATUS_FALSE; } } if (WebRtcIsac_SetMaxRate(context->ISAC_main_inst, codec->implementation->bits_per_second) < 0) { return SWITCH_STATUS_FALSE; } return SWITCH_STATUS_SUCCESS; } static switch_status_t switch_isac_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 isac_context *context = codec->private_info; WebRtc_Word16 len = 0, *in, *out; int rise = (codec->implementation->actual_samples_per_second / 100); in = decoded_data; out = encoded_data; while(len == 0) { len = WebRtcIsac_Encode(context->ISAC_main_inst, in, out); in += rise; } if (len < 0) { return SWITCH_STATUS_GENERR; } *encoded_data_len = (uint32_t) len; return SWITCH_STATUS_SUCCESS; } static switch_status_t switch_isac_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 isac_context *context = codec->private_info; WebRtc_Word16 len, speechType[1]; if ((*flag & SFF_PLC)) { len = WebRtcIsac_DecodePlc(context->ISAC_main_inst, decoded_data, 1); } else { len = WebRtcIsac_Decode(context->ISAC_main_inst, encoded_data, encoded_data_len, decoded_data, speechType); } if (len < 0) { *decoded_data_len = 0; return SWITCH_STATUS_GENERR; } *decoded_data_len = (uint32_t) len * 2; return SWITCH_STATUS_SUCCESS; } static switch_status_t switch_isac_destroy(switch_codec_t *codec) { struct isac_context *context = codec->private_info; WebRtcIsac_Free(context->ISAC_main_inst); return SWITCH_STATUS_SUCCESS; } SWITCH_MODULE_LOAD_FUNCTION(mod_isac_codec_load) { switch_codec_interface_t *codec_interface; *module_interface = switch_loadable_module_create_module_interface(pool, modname); SWITCH_ADD_CODEC(codec_interface, "isac"); /* 8.0kbit */ switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, 99, "isac", "ibitrate=32000;maxbitrate=53400", 16000, 16000, 53400, 30000, 480, 960, 0, 1, 3, switch_isac_init, switch_isac_encode, switch_isac_decode, switch_isac_destroy); switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, 99, "isac", "ibitrate=32000;maxbitrate=53400", 16000, 16000, 53400, 60000, 960, 1920, 0, 1, 6, switch_isac_init, switch_isac_encode, switch_isac_decode, switch_isac_destroy); switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, 99, "isac", "ibitrate=32000;maxbitrate=160000", 32000, 32000, 160000, 30000, 960, 1920, 0, 1, 6, switch_isac_init, switch_isac_encode, switch_isac_decode, switch_isac_destroy); switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, 99, "isac", "ibitrate=32000;maxbitrate=160000", 32000, 32000, 160000, 60000, 1920, 3840, 0, 1, 6, switch_isac_init, switch_isac_encode, switch_isac_decode, switch_isac_destroy); /* 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 noet: */