/* * 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 * * Portions created by the Initial Developer are Copyright (C) * the Initial Developer. All Rights Reserved. * * Contributor(s): * * for fsg729 ( which used IPP media libraries ) * Matteo Brancaleoni * * The bcg729 codec itself is not distributed with this module. * * mod_bcg729.c -- G.729 Codec Module * */ #include "switch.h" #include "bcg729/encoder.h" #include "bcg729/decoder.h" SWITCH_MODULE_LOAD_FUNCTION(mod_bcg729_load); SWITCH_MODULE_DEFINITION(mod_bcg729, mod_bcg729_load, NULL, NULL); struct bcg729_context { bcg729DecoderChannelContextStruct *decoder_object; bcg729EncoderChannelContextStruct *encoder_object; }; static switch_status_t switch_bcg729_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings) { struct bcg729_context *context = NULL; int encoding, decoding; encoding = (flags & SWITCH_CODEC_FLAG_ENCODE); decoding = (flags & SWITCH_CODEC_FLAG_DECODE); if (!(encoding || decoding) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(struct bcg729_context))))) { return SWITCH_STATUS_FALSE; } else { /* if (codec->fmtp_in) { codec->fmtp_out = switch_core_strdup(codec->memory_pool, codec->fmtp_in); } */ codec->fmtp_out = switch_core_strdup(codec->memory_pool, "annexb=no"); if (encoding) { context->encoder_object = initBcg729EncoderChannel(0); } if (decoding) { context->decoder_object = initBcg729DecoderChannel(); } codec->private_info = context; return SWITCH_STATUS_SUCCESS; } } static switch_status_t switch_bcg729_destroy(switch_codec_t *codec) { struct bcg729_context *context = codec->private_info; closeBcg729EncoderChannel(context->encoder_object); closeBcg729DecoderChannel(context->decoder_object); codec->private_info = NULL; return SWITCH_STATUS_SUCCESS; } static switch_status_t switch_bcg729_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 bcg729_context *context = codec->private_info; if (!context) { return SWITCH_STATUS_FALSE; } if (decoded_data_len % 160 == 0) { uint32_t new_len = 0; int16_t *ddp = decoded_data; uint8_t *edp = encoded_data; int x; int loops = (int) decoded_data_len / 160; for (x = 0; x < loops && new_len < *encoded_data_len; x++) { uint8_t frameSize; bcg729Encoder(context->encoder_object, ddp, edp, &frameSize); edp += frameSize; ddp += frameSize * 8; new_len += frameSize; } if (new_len <= *encoded_data_len) { *encoded_data_len = new_len; } else { switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "buffer overflow!!! %u >= %u\n", new_len, *encoded_data_len); return SWITCH_STATUS_FALSE; } } return SWITCH_STATUS_SUCCESS; } static switch_status_t switch_bcg729_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 bcg729_context *context = codec->private_info; if (!context) { return SWITCH_STATUS_FALSE; } int framesize; int x; uint32_t new_len = 0; uint8_t *edp = encoded_data; int16_t *ddp = decoded_data; if (encoded_data_len == 0) { /* Native PLC interpolation */ bcg729Decoder(context->decoder_object, NULL, 0, 1, 0, 0, ddp); ddp += 80; decoded_data_len = (uint32_t *) 160; switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "g729 zero length frame\n"); return SWITCH_STATUS_SUCCESS; } for(x = 0; x < encoded_data_len && new_len < *decoded_data_len; x += framesize) { uint8_t isSID = (encoded_data_len - x < 8) ? 1 : 0; framesize = (isSID==1) ? 2 : 10; bcg729Decoder(context->decoder_object, edp, encoded_data_len, 0, isSID, 0, ddp); ddp += 80; edp += framesize; new_len += 160; } if (new_len <= *decoded_data_len) { *decoded_data_len = new_len; } else { switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "buffer overflow!!!\n"); return SWITCH_STATUS_FALSE; } return SWITCH_STATUS_SUCCESS; } SWITCH_MODULE_LOAD_FUNCTION(mod_bcg729_load) { switch_codec_interface_t *codec_interface; int mpf = 10000, spf = 80, bpf = 160, ebpf = 10, count; /* 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, "G.729"); for (count = 12; count > 0; count--) { switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, 18, /* the IANA code number */ "G729", /* the IANA code name */ "annexb=no", /* default fmtp to send (can be overridden by the init function) */ 8000, /* samples transferred per second */ 8000, /* actual samples transferred per second */ 8000, /* bits transferred per second */ mpf * count, /* number of microseconds per frame */ spf * count, /* number of samples per frame */ bpf * count, /* number of bytes per frame decompressed */ ebpf * count, /* number of bytes per frame compressed */ 1, /* number of channels represented */ count * 10, /* number of frames per network packet */ switch_bcg729_init, /* function to initialize a codec handle using this implementation */ switch_bcg729_encode, /* function to encode raw data into encoded data */ switch_bcg729_decode, /* function to decode encoded data into raw data */ switch_bcg729_destroy); /* deinitalize a codec handle using this implementation */ } /* 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: */